{"slug":"sandbaseai-email-validator","name":"email-validator","description":"Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation.","tagline":"Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation.","category":"research","tags":["agent-skill"],"author":{"name":"sandbaseai","verified":false,"url":"https://github.com/sandbaseai"},"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"recursive skill source sync","sourceDetail":"sandbaseai/sandbase-skills","creatorName":"sandbaseai","creatorUrl":"https://github.com/sandbaseai","sourceUrl":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/sandbaseai-email-validator#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. Creators can claim the listing to update ownership signals."},"stats":{"stars":68,"forks":3,"verified_installs":0,"install_attempts":0,"successful_runs":0,"total_outcomes":0,"downloads":0,"rating":0,"review_count":0,"quality_score":35.67},"quality":{"score":65,"tier":"promising","label":"Promising","summary":"Useful candidate, but compare it with alternatives before adopting.","signals":[{"label":"GitHub stars","value":"68","tone":"neutral"},{"label":"Freshness","value":"11d ago","tone":"positive"},{"label":"Install ready","value":"Yes","tone":"positive"},{"label":"License","value":"Apache-2.0","tone":"neutral"}],"warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations."]},"trust":{"version":"trust-score-v4","score":67,"tier":"review","label":"Manual review","summary":"Potentially useful, but at least one trust signal needs human inspection.","recommendedAction":"Inspect the repository, license, and recent activity before connecting it to agent workflows.","dimensions":[{"id":"github_adoption","label":"GitHub adoption","score":48,"weight":0.13,"status":"warn","detail":"68 GitHub stars"},{"id":"repo_activity","label":"Stars/forks activity","score":43,"weight":0.08,"status":"warn","detail":"68 stars, 3 forks; issue activity unavailable in current metadata"},{"id":"maintenance","label":"Recent maintenance","score":100,"weight":0.14,"status":"pass","detail":"11d since push"},{"id":"license","label":"License clarity","score":86,"weight":0.09,"status":"pass","detail":"Apache-2.0"},{"id":"documentation","label":"README/SKILL.md completeness","score":76,"weight":0.14,"status":"info","detail":"Public metadata needs stronger README/SKILL.md context"},{"id":"dependency_risk","label":"Dependency/runtime risk","score":82,"weight":0.12,"status":"pass","detail":"network or browser surface"},{"id":"installability","label":"Install availability","score":92,"weight":0.1,"status":"pass","detail":"npx skills add sandbaseai/sandbase-skills --skill email-validator"},{"id":"install_safety","label":"Install command safety","score":92,"weight":0.1,"status":"pass","detail":"standard package or runtime install path"},{"id":"permission_surface","label":"Permission surface","score":74,"weight":0.07,"status":"info","detail":"network or browser access, database access"},{"id":"repository","label":"Repository evidence","score":86,"weight":0.04,"status":"pass","detail":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator"},{"id":"review_status","label":"Review status","score":66,"weight":0.05,"status":"info","detail":"AI review data available"},{"id":"agent_outcomes","label":"Agent Proven outcomes","score":54,"weight":0.13,"status":"info","detail":"No agent outcome data yet"}],"checks":[{"status":"warn","label":"GitHub adoption","detail":"68 GitHub stars"},{"status":"warn","label":"Stars/forks activity","detail":"68 stars, 3 forks; issue activity unavailable in current metadata"},{"status":"pass","label":"Recent maintenance","detail":"11d since push"},{"status":"pass","label":"License clarity","detail":"Apache-2.0"},{"status":"info","label":"README/SKILL.md completeness","detail":"Public metadata needs stronger README/SKILL.md context"},{"status":"pass","label":"Dependency/runtime risk","detail":"network or browser surface"},{"status":"pass","label":"Install availability","detail":"npx skills add sandbaseai/sandbase-skills --skill email-validator"},{"status":"pass","label":"Install command safety","detail":"standard package or runtime install path"},{"status":"info","label":"Permission surface","detail":"network or browser access, database access"},{"status":"pass","label":"Repository evidence","detail":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator"},{"status":"info","label":"Review status","detail":"AI review data available"},{"status":"info","label":"Agent Proven outcomes","detail":"No agent outcome data yet"},{"status":"warn","label":"Ownership","detail":"No approved owner claim yet"},{"status":"info","label":"OpenAgentSkill usage","detail":"No local usage activity yet"},{"status":"info","label":"Agent outcomes","detail":"No agent outcome data yet"}],"strengths":["AI review approved","Install path is available","Repository evidence is available","Recently maintained repository","Install command has no obvious high-risk pattern"],"warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"],"evidence":{"stars":"68 GitHub stars","repoActivity":"68 stars, 3 forks","lastPushed":"11d since push","license":"Apache-2.0","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","install":"npx skills add sandbaseai/sandbase-skills --skill email-validator","installSafety":"standard package or runtime install path","permissionSurface":"network or browser access, database access","documentation":"Usable metadata, review docs","agentOutcomes":"No agent outcome data yet"},"installReadiness":{"ready":true,"command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","policy":"human_review_before_install","label":"Human review before install","notes":["Install path is available","Repository evidence is available","License is declared","No Agent Proven outcome evidence yet","11d since push"]},"agentCompatibility":["Codex","Claude Code","Cursor","OpenAgentSkill CLI"],"riskSummary":{"level":"medium","label":"Review before production","notes":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"outcomeEvidence":{"total":0,"successes":0,"failures":0,"notRelevant":0,"successRate":null,"installAttempts":0,"riskBlocked":0,"setupRequired":0,"installSuccessRate":null,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"recentSuccessRate":null,"recentFailureRate":null,"uniqueAgents":0,"agentProvenScore":0,"agentProvenLabel":"Needs first agent run","lastOutcomeAt":null,"label":"No agent outcome data yet"},"autoInstall":{"allowed":false,"sandboxRequired":true,"policy":"human_review_before_install","reason":"Human review or sandbox validation is required before automatic installation."},"bestFor":["research","agent-skill"],"doNotUseFor":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace"],"knownRisks":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"safety":{"score":60,"level":"review_before_install","label":"Review before install","safety_tier":{"tier":"reviewed","label":"Reviewed with permission notes","badge":"REVIEWED","summary":"Usable candidate, but the agent should surface permission and audit notes before installation.","recommended_action":"Require human approval before installing into a real workspace.","auto_install_policy":"review","reasons":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","60/100 agent safety score"]},"auto_install_allowed":false,"human_review_required":true,"blocked":false,"audit_risk":"needs_review","permission_hints":[{"id":"network","label":"Network access","reason":"Skill likely fetches remote pages, APIs, repositories, or external services.","severity":"medium"},{"id":"database","label":"Database access","reason":"Skill may inspect schemas, query databases, or work with persistent stores.","severity":"medium"}],"policy_warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations."],"constraints_applied":{"max_risk":"medium","needs_install_command":true,"min_stars":0}},"safety_gate":{"tier":"reviewed","label":"Reviewed with permission notes","badge":"REVIEWED","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Require human approval before installing into a real workspace.","reasons":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","60/100 agent safety score"]},"supply_profile":{"track":{"slug":"research","label":"Research and knowledge work","shortLabel":"Research","description":"Deep research, source comparison, literature review, RAG, knowledge search, and reports."},"scenario":{"label":"Research agents","description":"I need my agent to research a topic, compare sources, and produce a concise report.","useCases":[{"slug":"research-agents","title":"Research agents"},{"slug":"browser-automation","title":"Browser automation"},{"slug":"workflow-automation","title":"Workflow automation"}]},"applicableAgents":["Claude Code","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":68,"starsLabel":"68","forks":3,"license":"Apache-2.0","qualityScore":65,"trustScore":67,"auditScore":76},"maintenance":{"status":"fresh","label":"11d since push","daysSincePush":11,"lastPushedAt":"2026-08-28T00:35:16+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review"]},"coverageTags":["Research","Research agents","agent-skill"]},"audit":{"audit_score":76,"risk_level":"needs_review","risk_label":"Needs review","warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review"]},"decision":{"readiness_score":64,"readiness_label":"Prototype first","headline":"Fallback candidate for Research agents","role":"Fallback candidate","primary_fit":"Research agents","best_for":["Research agents workflows","Claude Code teams","builders willing to evaluate younger projects"],"risks":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No OpenAgentSkill engagement data yet"],"next_steps":["Install it in a sandbox agent and run one Research agents task end to end.","Compare output quality, latency, and failure behavior against at least one alternative.","Promote it into production only after reviewing repository permissions, license, and maintenance signals."]},"agent_readable_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"sandbaseai-email-validator","name":"email-validator","description":"Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation.","category":"research","url":"https://www.openagentskill.com/skills/sandbaseai-email-validator","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","github_repo":"sandbaseai/sandbase-skills"},"suited_tasks":["Research agents workflows","Claude Code teams","builders willing to evaluate younger projects","Search sources","Extract claims","Synthesize findings","Navigate pages","Click and type safely"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","CLI"],"install":{"command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add sandbaseai-email-validator"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"email-validator\" agent skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"email-validator\" as a Claude Code skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"email-validator\" from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/sandbaseai-email-validator/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/sandbaseai-email-validator"},"trust":{"score":67,"label":"Manual review","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"68 GitHub stars","repoActivity":"68 stars, 3 forks","lastPushed":"11d since push","license":"Apache-2.0","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","install":"npx skills add sandbaseai/sandbase-skills --skill email-validator","installSafety":"standard package or runtime install path","permissionSurface":"network or browser access, database access","documentation":"Usable metadata, review docs","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["research","agent-skill"],"known_risks":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":76,"risk_level":"needs_review","risk_label":"Needs review","warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"safety_gate":{"tier":"reviewed","label":"Reviewed with permission notes","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Require human approval before installing into a real workspace."},"quality":{"score":65,"label":"Promising"},"supply":{"track":"Research and knowledge work","scenario":"Research agents","maintenance":"11d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","production agents without a repository review","The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No OpenAgentSkill engagement data yet","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review"],"agent_contract":{"task_input":"Use email-validator in an agent workflow","recommended_action":"Require human approval before installing into a real workspace.","install_policy":"review","minimum_review_before_use":["Trust: 67/100 Manual review","Audit: 76/100 Needs review","Safety: 60/100 Review before install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"sandbaseai-email-validator (email-validator)","install_command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","risk_summary":"Needs review; Reviewed with permission notes; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"sandbaseai-email-validator","task":"Use email-validator in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/sandbaseai-email-validator","api":"https://www.openagentskill.com/api/agent/skills/sandbaseai-email-validator","audit":"https://www.openagentskill.com/skills/sandbaseai-email-validator/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=sandbaseai-email-validator&task=Use%20email-validator%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20email-validator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20email-validator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/sandbaseai-email-validator/install","manifest":"https://www.openagentskill.com/api/registry/manifest/sandbaseai-email-validator"}},"machine_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"sandbaseai-email-validator","name":"email-validator","description":"Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation.","category":"research","url":"https://www.openagentskill.com/skills/sandbaseai-email-validator","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","github_repo":"sandbaseai/sandbase-skills"},"suited_tasks":["Research agents workflows","Claude Code teams","builders willing to evaluate younger projects","Search sources","Extract claims","Synthesize findings","Navigate pages","Click and type safely"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","CLI"],"install":{"command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add sandbaseai-email-validator"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"email-validator\" agent skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"email-validator\" as a Claude Code skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"email-validator\" from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/sandbaseai-email-validator/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/sandbaseai-email-validator"},"trust":{"score":67,"label":"Manual review","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"68 GitHub stars","repoActivity":"68 stars, 3 forks","lastPushed":"11d since push","license":"Apache-2.0","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","install":"npx skills add sandbaseai/sandbase-skills --skill email-validator","installSafety":"standard package or runtime install path","permissionSurface":"network or browser access, database access","documentation":"Usable metadata, review docs","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["research","agent-skill"],"known_risks":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":76,"risk_level":"needs_review","risk_label":"Needs review","warnings":["The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review","GitHub adoption: 68 GitHub stars","Stars/forks activity: 68 stars, 3 forks; issue activity unavailable in current metadata"]},"safety_gate":{"tier":"reviewed","label":"Reviewed with permission notes","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Require human approval before installing into a real workspace."},"quality":{"score":65,"label":"Promising"},"supply":{"track":"Research and knowledge work","scenario":"Research agents","maintenance":"11d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","production agents without a repository review","The API map file is circular: it only says 'See sandbase_describe_tool for details' for every tool, so SKILL.md does not independently document inputs, outputs, or limitations.","No OpenAgentSkill engagement data yet","No explicit security guidance for handling untrusted email data or API responses as potential prompt-injection content.","No setup or prerequisites are documented, such as SandBase gateway availability, authentication assumptions, rate limits, or PII handling expectations.","No examples or expected output format are provided, which may lead to inconsistent synthesis of results.","Quality score needs review"],"agent_contract":{"task_input":"Use email-validator in an agent workflow","recommended_action":"Require human approval before installing into a real workspace.","install_policy":"review","minimum_review_before_use":["Trust: 67/100 Manual review","Audit: 76/100 Needs review","Safety: 60/100 Review before install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"sandbaseai-email-validator (email-validator)","install_command":"npx skills add sandbaseai/sandbase-skills --skill email-validator","risk_summary":"Needs review; Reviewed with permission notes; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"sandbaseai-email-validator","task":"Use email-validator in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/sandbaseai-email-validator","api":"https://www.openagentskill.com/api/agent/skills/sandbaseai-email-validator","audit":"https://www.openagentskill.com/skills/sandbaseai-email-validator/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=sandbaseai-email-validator&task=Use%20email-validator%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20email-validator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20email-validator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/sandbaseai-email-validator/install","manifest":"https://www.openagentskill.com/api/registry/manifest/sandbaseai-email-validator"}},"platforms":["Claude Code"],"use_cases":[{"slug":"research-agents","title":"Research agents","url":"https://www.openagentskill.com/use-cases/research-agents"},{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"workflow-automation","title":"Workflow automation","url":"https://www.openagentskill.com/use-cases/workflow-automation"},{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"}],"install":"npx skills add sandbaseai/sandbase-skills --skill email-validator","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add sandbaseai-email-validator","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"email-validator\" agent skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"email-validator\" as a Claude Code skill from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"email-validator\" from https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Validate email addresses for deliverability, check reputation scores, verify MX records, and assess email-sending safety. Covers deliverability checks, reputation scoring, bounce risk assessment, and bulk validation for outreach campaign preparation. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"sandbaseai-email-validator\",\"task\":\"Install email-validator\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator","github_repo":"sandbaseai/sandbase-skills","version":"1.0.0","license":"Apache-2.0","updated_at":"2026-09-01T11:59:28.941454+00:00","canonical_key":"sandbaseai/sandbase-skills#research/email-validator","recommendation_reasons":["Install handoff is available","Repository freshness signal is available"],"urls":{"web":"https://www.openagentskill.com/skills/sandbaseai-email-validator","api":"https://www.openagentskill.com/api/agent/skills/sandbaseai-email-validator","install_api":"https://www.openagentskill.com/api/skills/sandbaseai-email-validator/install","audit":"https://www.openagentskill.com/skills/sandbaseai-email-validator/audit","repository":"https://github.com/sandbaseai/sandbase-skills/tree/main/research/email-validator"},"meta":{"endpoint":"/api/registry/manifest/{slug}","canonical_agent_endpoint":"/api/agent/skills/sandbaseai-email-validator","agent_friendly":true,"api_version":"1.0","generated_at":"2026-09-08T12:38:54.614Z"}}