Registry indexed
squirrelscan audits websites for SEO, performance, security, accessibility, content, and structured data issues (260+ rules) and scores site health, via the squirrel CLI. Use when the user wants to check, audit, or improve a website's SEO, ranking, speed, or health, and for anyth
squirrelscan audits websites for SEO, performance, security, accessibility, content, and structured data issues (260+ rules) and scores site health, via the squirrel CLI. Use when the user wants to check, audit, or improve a website's SEO, ranking, speed, or health, and for anything squirrelscan itself, installing or updating the CLI, login and API keys, running audits, publishing and sharing reports, cloud credits, MCP server setup, configuration, or troubleshooting.
Source documentation, not instructions for this website. Review permissions before running any commands.
squirrelscan is a website audit tool built for AI agents. It answers "what's wrong with this website and how do I fix it": it crawls a site like a search engine, analyzes every page against 260+ rules in 21 categories (SEO, performance, security, accessibility, content, structured data, agent readiness, and more), and returns a health score plus concrete, fixable issues. Use it whenever a user wants their site checked, ranked better, faster, or healthier, before/after a deploy, or in CI.
It ships as a single CLI binary, squirrel, for macOS, Windows, and Linux. This skill covers operating it: installing, authenticating, running audits, publishing reports, cloud features, and MCP integration. For the full fix-the-website workflow (audit, map issues to code, fix, re-audit), use the companion audit-website skill.
https://docs.squirrelscan.com/rules/{rule_category}/{rule_id}Download and install instructions: squirrelscan.com/download
The binary installs to ~/.local/bin/squirrel. Verify with:
squirrel --version
Keep it current:
squirrel self update
If squirrel is not found, ensure ~/.local/bin is in PATH, or reinstall from the download page.
| Command | Purpose |
|---|---|
squirrel audit <url> | Crawl + analyze + report in one step |
squirrel crawl <url> | Crawl only (no analysis) |
squirrel analyze | Run audit rules on a stored crawl |
squirrel report [id] | Query, render, diff, and publish stored reports |
squirrel init | Create squirrel.toml project config |
squirrel config | Show or edit configuration |
squirrel auth | login / logout / status / whoami |
squirrel keys | Mint, list, revoke org API keys |
squirrel credits | Cloud credit balance + feature pricing |
squirrel mcp | Run the local MCP server (stdio) |
squirrel skills | Install or update agent skills |
squirrel self | install / update / doctor / completion / version / settings / uninstall |
squirrel feedback | Send feedback to the squirrelscan team |
Every command supports --help.
squirrel init -n my-project # optional: project config in cwd
squirrel audit https://example.com --format llm
--format llm when an agent is reading the output: it is a compact, token-optimized format built for LLMs.squirrel report re-renders without re-crawling.| Mode | Default pages | Behavior |
|---|---|---|
quick (default) | 25 | Seed + sitemaps only, fast health check |
surface | 100 | One sample per URL pattern (/blog/{slug} crawled once) |
full | 500 | Crawl everything up to the limit |
squirrel audit https://example.com -C full -m 500 --format llm
Local audits never require an account. Sign in to unlock cloud features (publishing, browser rendering, scheduled crawls, credits):
squirrel auth login # browser-based login
squirrel auth status # source, scopes, active org
squirrel auth whoami
squirrel auth logout
Headless / CI environments use an org API key instead:
squirrel keys create # requires a login session; prints an sq_... key
Set it as SQUIRRELSCAN_API_KEY in the environment. Treat keys as secrets; never commit them.
Render the latest (or a specific) stored audit:
squirrel report --list # recent audits
squirrel report <audit-id> --format llm
squirrel report example.com --format markdown -o report.md
Formats: console, text, json, html, markdown, xml, llm. Filter with --severity error or --category core,links.
Signed-in audits publish a shareable report to reports.squirrelscan.com by default (visibility: unlisted). Control it:
squirrel report <audit-id> --publish --visibility unlisted # public | unlisted | private
squirrel audit https://example.com --no-publish # skip publishing for a run
squirrel audit https://example.com --offline # fully offline: no cloud, no publish, no telemetry
squirrel report --diff <baseline-audit-id> --format llm
squirrel report --regression-since example.com --format llm
Diff mode supports console, text, json, llm, and markdown.
Cloud features are pay-as-you-go with credits (nothing charged up front). Check balance and pricing:
squirrel credits
--render / --render-mode auto|all|off: cloud browser rendering for client-rendered pages (uses credits, requires login).--yes skips spend confirmations up to the configured per-audit credit cap.--fail-on "score<90" (repeatable) makes CI runs exit non-zero when a threshold trips.Two ways to connect agents over MCP:
squirrel mcp runs against the local CLI. Register it in your agent's MCP config with command squirrel and args ["mcp"].https://mcp.squirrelscan.com/mcp. Sign in via OAuth from the MCP client, or send an Authorization: Bearer sq_... API key header.Docs: https://docs.squirrelscan.com/developers/mcp
Call the send_feedback tool any time something in a session surprises you. It takes category, message, and optional run_id/website_id. Pick the category that fits:
bug_report — a defect in squirrelscan itself: a wrong or missing rule result, a crash, a broken tool. Include the site, rule id, and what you expected.feature_request — something squirrelscan should do but doesn't.what_worked — something worked well and you want the team to know.confusing — a response or behavior was unclear.missing_data — a report or tool response lacked something you needed.tool_ergonomics — awkward tool shape, arguments, or naming.other — anything else.Feedback lands directly in the team's review queue with your org attached. It works with any authenticated credentials, including read-only API keys, and is available on the hosted MCP surface now (not yet on squirrel mcp local stdio). Use it instead of squirrel feedback when you're an agent reporting mid-session; humans can use squirrel feedback or squirrelscan.com/support.
Project config lives in squirrel.toml (created by squirrel init). User settings live at ~/.squirrel/settings.json.
squirrel config show
squirrel config set <key> <value>
squirrel config path
squirrel config validate
Useful sections: [crawler] (delays, headers, incremental re-crawl), [cloud] (render mode, max credits per audit).
Attach headers to every crawl request with the repeatable -H "Name: Value" flag or a headers map under [crawler]. The main use case is Web Bot Auth (Shopify / Cloudflare), so platforms that block unknown crawlers can authorize squirrelscan. Header values are secrets: squirrelscan redacts them in output, and you should source them from a secret store rather than committing them. Full recipe: https://docs.squirrelscan.com/guides/web-bot-auth
squirrel self doctor # health checks
squirrel self update # update the binary
squirrel self completion # shell completions
squirrel skills update # update installed agent skills
squirrel: command not found: install from squirrelscan.com/download and ensure ~/.local/bin is in PATH.squirrel auth login again, or check SQUIRRELSCAN_API_KEY.--verbose to see progress; large sites can take minutes.https://example.com, not example.com.squirrel self doctor, then report it — agents via the send_feedback MCP tool (bug_report category), humans via squirrel feedback or squirrelscan.com/support.name: squirrelscan description: squirrelscan audits websites for SEO, performance, security, accessibility, content, and structured data issues (260+ rules) and scores site health, via the squirrel CLI. Use when the user wants to check, audit, or improve a website's SEO, ranking, speed, or health, and for anything squirrelscan itself, installing or updating the CLI, login and API keys, running audits, publishing and sharing reports, cloud credits, MCP server setup, configuration, or troubleshooting. license: See LICENSE file in repository root compatibility: Requires squirrel CLI installed and accessible in PATH (or guides the user to install it) metadata: author: squirrelscan version: "1.2" allowed-tools: Bash(squirrel:*) Read
---
name: squirrelscan
description: squirrelscan audits websites for SEO, performance, security, accessibility, content, and structured data issues (260+ rules) and scores site health, via the squirrel CLI. Use when the user wants to check, audit, or improve a website's SEO, ranking, speed, or health, and for anything squirrelscan itself, installing or updating the CLI, login and API keys, running audits, publishing and sharing reports, cloud credits, MCP server setup, configuration, or troubleshooting.
license: See LICENSE file in repository root
compatibility: Requires squirrel CLI installed and accessible in PATH (or guides the user to install it)
metadata:
author: squirrelscan
version: "1.2"
allowed-tools: Bash(squirrel:*) Read
---
# squirrelscan CLI
squirrelscan is a website audit tool built for AI agents. It answers "what's wrong with this website and how do I fix it": it crawls a site like a search engine, analyzes every page against 260+ rules in 21 categories (SEO, performance, security, accessibility, content, structured data, agent readiness, and more), and returns a health score plus concrete, fixable issues. Use it whenever a user wants their site checked, ranked better, faster, or healthier, before/after a deploy, or in CI.
It ships as a single CLI binary, `squirrel`, for macOS, Windows, and Linux. This skill covers operating it: installing, authenticating, running audits, publishing reports, cloud features, and MCP integration. For the full fix-the-website workflow (audit, map issues to code, fix, re-audit), use the companion `audit-website` skill.
## Links
- Website: [squirrelscan.com](https://squirrelscan.com)
- Docs: [docs.squirrelscan.com](https://docs.squirrelscan.com)
- Rule reference: `https://docs.squirrelscan.com/rules/{rule_category}/{rule_id}`
- Dashboard (cloud account, audit history, credits): [app.squirrelscan.com](https://app.squirrelscan.com)
## Install
Download and install instructions: [squirrelscan.com/download](https://squirrelscan.com/download)
The binary installs to `~/.local/bin/squirrel`. Verify with:
```bash
squirrel --version
```
Keep it current:
```bash
squirrel self update
```
If `squirrel` is not found, ensure `~/.local/bin` is in PATH, or reinstall from the download page.
## Command overview
| Command | Purpose |
|---------|---------|
| `squirrel audit <url>` | Crawl + analyze + report in one step |
| `squirrel crawl <url>` | Crawl only (no analysis) |
| `squirrel analyze` | Run audit rules on a stored crawl |
| `squirrel report [id]` | Query, render, diff, and publish stored reports |
| `squirrel init` | Create `squirrel.toml` project config |
| `squirrel config` | Show or edit configuration |
| `squirrel auth` | login / logout / status / whoami |
| `squirrel keys` | Mint, list, revoke org API keys |
| `squirrel credits` | Cloud credit balance + feature pricing |
| `squirrel mcp` | Run the local MCP server (stdio) |
| `squirrel skills` | Install or update agent skills |
| `squirrel self` | install / update / doctor / completion / version / settings / uninstall |
| `squirrel feedback` | Send feedback to the squirrelscan team |
Every command supports `--help`.
## Quickstart
```bash
squirrel init -n my-project # optional: project config in cwd
squirrel audit https://example.com --format llm
```
- Local audits are free and run entirely on your machine. No account needed.
- Use `--format llm` when an agent is reading the output: it is a compact, token-optimized format built for LLMs.
- Audits are cached in a local project database; `squirrel report` re-renders without re-crawling.
### Coverage modes
| Mode | Default pages | Behavior |
|------|---------------|----------|
| `quick` (default) | 25 | Seed + sitemaps only, fast health check |
| `surface` | 100 | One sample per URL pattern (`/blog/{slug}` crawled once) |
| `full` | 500 | Crawl everything up to the limit |
```bash
squirrel audit https://example.com -C full -m 500 --format llm
```
## Authentication and accounts
Local audits never require an account. Sign in to unlock cloud features (publishing, browser rendering, scheduled crawls, credits):
```bash
squirrel auth login # browser-based login
squirrel auth status # source, scopes, active org
squirrel auth whoami
squirrel auth logout
```
Headless / CI environments use an org API key instead:
```bash
squirrel keys create # requires a login session; prints an sq_... key
```
Set it as `SQUIRRELSCAN_API_KEY` in the environment. Treat keys as secrets; never commit them.
## Reports
Render the latest (or a specific) stored audit:
```bash
squirrel report --list # recent audits
squirrel report <audit-id> --format llm
squirrel report example.com --format markdown -o report.md
```
Formats: `console`, `text`, `json`, `html`, `markdown`, `xml`, `llm`. Filter with `--severity error` or `--category core,links`.
### Publishing
Signed-in audits publish a shareable report to reports.squirrelscan.com by default (visibility: unlisted). Control it:
```bash
squirrel report <audit-id> --publish --visibility unlisted # public | unlisted | private
squirrel audit https://example.com --no-publish # skip publishing for a run
squirrel audit https://example.com --offline # fully offline: no cloud, no publish, no telemetry
```
### Regression diffs
```bash
squirrel report --diff <baseline-audit-id> --format llm
squirrel report --regression-since example.com --format llm
```
Diff mode supports `console`, `text`, `json`, `llm`, and `markdown`.
## Cloud features and credits
Cloud features are pay-as-you-go with credits (nothing charged up front). Check balance and pricing:
```bash
squirrel credits
```
- `--render` / `--render-mode auto|all|off`: cloud browser rendering for client-rendered pages (uses credits, requires login).
- `--yes` skips spend confirmations up to the configured per-audit credit cap.
- `--fail-on "score<90"` (repeatable) makes CI runs exit non-zero when a threshold trips.
- The dashboard at [app.squirrelscan.com](https://app.squirrelscan.com) shows audit history, issues, and credit usage.
## MCP server
Two ways to connect agents over MCP:
- **Local (stdio)**: `squirrel mcp` runs against the local CLI. Register it in your agent's MCP config with command `squirrel` and args `["mcp"]`.
- **Hosted (streamable-http)**: `https://mcp.squirrelscan.com/mcp`. Sign in via OAuth from the MCP client, or send an `Authorization: Bearer sq_...` API key header.
Docs: https://docs.squirrelscan.com/developers/mcp
### Agent feedback
Call the `send_feedback` tool any time something in a session surprises you. It takes `category`, `message`, and optional `run_id`/`website_id`. Pick the category that fits:
- `bug_report` — a defect in squirrelscan itself: a wrong or missing rule result, a crash, a broken tool. Include the site, rule id, and what you expected.
- `feature_request` — something squirrelscan should do but doesn't.
- `what_worked` — something worked well and you want the team to know.
- `confusing` — a response or behavior was unclear.
- `missing_data` — a report or tool response lacked something you needed.
- `tool_ergonomics` — awkward tool shape, arguments, or naming.
- `other` — anything else.
Feedback lands directly in the team's review queue with your org attached. It works with any authenticated credentials, including read-only API keys, and is available on the hosted MCP surface now (not yet on `squirrel mcp` local stdio). Use it instead of `squirrel feedback` when you're an agent reporting mid-session; humans can use `squirrel feedback` or [squirrelscan.com/support](https://squirrelscan.com/support).
## Configuration
Project config lives in `squirrel.toml` (created by `squirrel init`). User settings live at `~/.squirrel/settings.json`.
```bash
squirrel config show
squirrel config set <key> <value>
squirrel config path
squirrel config validate
```
Useful sections: `[crawler]` (delays, headers, incremental re-crawl), `[cloud]` (render mode, max credits per audit).
### Custom request headers
Attach headers to every crawl request with the repeatable `-H "Name: Value"` flag or a `headers` map under `[crawler]`. The main use case is Web Bot Auth (Shopify / Cloudflare), so platforms that block unknown crawlers can authorize squirrelscan. Header values are secrets: squirrelscan redacts them in output, and you should source them from a secret store rather than committing them. Full recipe: https://docs.squirrelscan.com/guides/web-bot-auth
## Maintenance
```bash
squirrel self doctor # health checks
squirrel self update # update the binary
squirrel self completion # shell completions
squirrel skills update # update installed agent skills
```
## Troubleshooting
- **`squirrel: command not found`**: install from [squirrelscan.com/download](https://squirrelscan.com/download) and ensure `~/.local/bin` is in PATH.
- **Session expired / 401**: run `squirrel auth login` again, or check `SQUIRRELSCAN_API_KEY`.
- **Slow or stuck crawl**: add `--verbose` to see progress; large sites can take minutes.
- **Invalid URL**: include the protocol: `https://example.com`, not `example.com`.
- **Anything else**: run `squirrel self doctor`, then report it — agents via the `send_feedback` MCP tool (`bug_report` category), humans via `squirrel feedback` or [squirrelscan.com/support](https://squirrelscan.com/support).
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: See LICENSE file in repository root
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
66/100
Promising
Trust
62/100
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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"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": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"GitHub adoption: 87 GitHub stars",
"Stars/forks activity: 87 stars, 10 forks; issue activity unavailable in current metadata",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 66,
"label": "Promising"
},
"supply": {
"track": "Marketing and growth automation",
"scenario": "Content automation",
"maintenance": "13d since push",
"risk": "Needs review"
},
"alternative_skills": [
{
"slug": "projectdiscovery-nuclei",
"name": "Nuclei",
"url": "https://www.openagentskill.com/skills/projectdiscovery-nuclei",
"stars": 29159,
"install_command": "",
"trust_score": 91,
"audit_score": 91
},
{
"slug": "wazuh-wazuh",
"name": "Wazuh",
"url": "https://www.openagentskill.com/skills/wazuh-wazuh",
"stars": 16271,
"install_command": "",
"trust_score": 88,
"audit_score": 90
}
],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"high-compliance environments without internal security review",
"No OpenAgentSkill engagement data yet",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution"
],
"agent_contract": {
"task_input": "Use squirrelscan in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 70/100 Manual review",
"Audit: 76/100 Needs review",
"Safety: 28/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "squirrelscan-squirrelscan-5044009e (squirrelscan)",
"install_command": "npx skills add squirrelscan/skills --skill squirrelscan",
"risk_summary": "Needs review; Blocked for auto-install; 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": "squirrelscan-squirrelscan-5044009e",
"task": "Use squirrelscan 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/squirrelscan-squirrelscan-5044009e",
"api": "https://www.openagentskill.com/api/agent/skills/squirrelscan-squirrelscan-5044009e",
"audit": "https://www.openagentskill.com/skills/squirrelscan-squirrelscan-5044009e/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=squirrelscan-squirrelscan-5044009e&task=Use%20squirrelscan%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20squirrelscan%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20squirrelscan%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/squirrelscan-squirrelscan-5044009e/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/squirrelscan-squirrelscan-5044009e"
}
}Listing source
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Audit
76/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.