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audit-api-usage

Inventory the integrations, service keys, legacy private apps, and internal tooling that call HubSpot APIs, and flag anything on legacy v1-v4 endpoints or legacy app architecture ahead of HubSpot's 2027 cutoffs. Produces a migration checklist to date-based API versions and servic

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Audit API Usage Before the 2027 Cutoffs

In March 2026 HubSpot replaced semantic API versioning (v1-v4) with date-based versions (/2026-09/-style paths, two releases a year, at least 18 months of support each). Two clocks are now running: v4 loses support on March 30, 2027, and v1-v3 are already unsupported, with enforcement in September 2027. Separately, HubSpot is retiring legacy private apps in favor of service keys. This skill inventories what in your stack calls HubSpot and produces a migration checklist for both.

Why This Matters

The deadline fails quietly: unsupported APIs "no longer receive updates, bug fixes, or stability guarantees," and marketplace apps that don't migrate risk losing certification. A portal typically has more callers than anyone remembers — service keys, legacy private apps, marketplace apps, middleware (Zapier/Make), form embeds, internal scripts, data warehouse syncs. Finding them takes an afternoon now or an incident later.

Key Facts

Fact	Detail
Current version	`2026-09` (for example `/crm/objects/2026-09/contacts`)
Release cadence	March and September, every year; each version is immutable
Support lifecycle	At least 18 months per version
v4 end of support	March 30, 2027
v1-v3 status	Unsupported since September 15, 2026 (no bug fixes, reliability, or security updates); enforcement September 2027
Legacy private apps	Creation disabled October 26, 2026 for existing accounts (September 28, 2026 for new ones). Existing apps keep working and must migrate by September 2027
Replacement for private apps	Service keys (Settings > Integrations > Service Keys): bearer tokens for REST calls, no webhooks
Also deprecated	Legacy v1 OAuth API (token issuance/introspection)
Behavior change in `2026-09`	CRM writes enforce admin-configured required and conditionally required properties, returning HTTP 400 where v3 accepted the write

Sources: HubSpot developer changelog, "Introducing date-based API versioning" (2026-03-30), "Deprecating support for HubSpot v4 APIs" (2026-05-21), "Legacy private app creation sunset" (2026-08-27), and "Legacy APIs and legacy apps: what's going unsupported and when" (2026-09-15). Re-check these before quoting dates to stakeholders; HubSpot has moved sunset dates before.

Prerequisites

Super Admin access (to view Integrations settings and app logs)
Optionally: a service key or existing legacy private app token (HUBSPOT_ACCESS_TOKEN in .env) for the account-level usage query
Access to the source code of any internal integrations

Execution Pattern

Stage 1: Plan

Confirm with the user: which systems are known to touch HubSpot (CRM syncs, website forms, analytics pipelines, internal scripts), and who owns each.

Stage 2: Before — Build the Caller Inventory

Work through each discovery source and record every caller in a checklist (owner, what it does, endpoints/versions used):

Legacy private apps and service keys: Settings > Integrations > Private Apps, and Settings > Integrations > Service Keys. Open each legacy app > Logs: the API call log shows the exact request paths (/crm/v3/..., /contacts/v1/...), which reveal the version in use. Record every legacy private app as a migration item in its own right, whatever endpoints it calls.
Connected/marketplace apps: Settings > Integrations > Connected Apps. You can't see their internals; note each vendor — certified apps are being pushed to migrate by HubSpot, but confirm with the vendor for anything business-critical.

Internal codebases: grep for version-revealing patterns:

grep -rEn "api\.hubapi\.com/[a-z-]+/v[0-9]|/contacts/v1|/email/public/v1|hubapi.com/automation/v[23]" .

Middleware (Zapier, Make, Workato, n8n): platform-managed connectors migrate on the vendor's schedule; custom HTTP steps inside them do not — check those by hand.
Account-wide API usage (optional script check): the account-info API reports daily API usage totals for privately distributed apps:
```
resp = requests.get(f"{BASE}/account-info/v3/api-usage/daily", headers=HEADERS)
```
This confirms how much traffic flows, not which versions — use the per-app logs from step 1 for version detail.

Stage 3: Execute — Classify and Plan Migrations

For every caller, classify:

Status	Meaning	Action
Red	Calls v1/v2 legacy endpoints (e.g., `/contacts/v1/`, `/email/public/v1/`, forms v2) or legacy OAuth v1	Migrate now. Many of these have already been shut off (Contact Lists v1 returns 404 since April 30, 2026; Pipelines v1 sunsets December 4, 2026)
Amber (v4)	Calls `/v4/` endpoints, such as `/automation/v4/flows` or `/crm/v4/` associations	Supported until 2027-03-30; migrate to date-based paths before then
Amber (v3)	Calls `/v3/` endpoints	Already unsupported, still working; migrate to `2026-09` date-based paths before September 2027
Amber (app)	Runs on a legacy private app token, whatever it calls	Move to a service key before September 2027
Green	Calls date-based paths with a service key or a projects-based app, or vendor-managed and confirmed migrating	Monitor

For amber/red internal code, the migration is usually mechanical: same resources, new path shape (/crm/v3/objects/contacts becomes /crm/objects/2026-09/contacts) and sometimes renamed fields. HubSpot's migration guide says many v3 contracts carry over unchanged but not all, so test each endpoint rather than assuming. Batch the work per codebase, not per endpoint.

Test writes in particular. From 2026-09, a create or update that omits a property an admin marked required is rejected with MISSING_REQUIRED_PROPERTY or MISSING_CONDITIONAL_REQUIRED_PROPERTY. An integration that wrote sparse records through v3 will start failing after migration unless it sends those properties.

This repo's own scripts are amber: they target /crm/v3/, /marketing/v3/, and /automation/v4/. They work today, and they are on the migration list in CONTRIBUTING.md like everyone else's.

Stage 4: After

Every caller in the inventory has a status and an owner.
Red items have migration tickets with dates; v4 callers are scheduled before 2027-03, v3 callers and legacy private apps before 2027-09.
Re-run this audit every 6 months — each March/September release starts a new support clock.

Rollback

Read-only — nothing to roll back.

Technical Gotchas

App logs are the ground truth. Code greps miss dynamically-built URLs; the per-app request logs in Settings show what is actually being called.
404 vs 403 vs unsupported. After end of support, endpoints may keep working for a while — "unsupported" means no fixes or guarantees, not an instant shutoff. Do not treat "it still works" as "we're fine."
You cannot create a new private app as a stopgap. After October 26, 2026 the option is gone for existing accounts. A new internal integration needs a service key from day one.
Service keys do not receive webhooks. An integration that relies on webhook subscriptions needs a projects-based app, not a service key.
OAuth is part of this. Apps using legacy v1 OAuth token endpoints must move to the date-based OAuth API even if their data endpoints are current.
SDK versions pin API versions. If an integration uses an official HubSpot SDK, the SDK's major version determines which API version it calls — check the SDK changelog, not just your code.

View source ↗

File metadata

name: audit-api-usage
description: "Inventory the integrations, service keys, legacy private apps, and internal tooling that call HubSpot APIs, and flag anything on legacy v1-v4 endpoints or legacy app architecture ahead of HubSpot's 2027 cutoffs. Produces a migration checklist to date-based API versions and service keys."
license: MIT
metadata:
  author: tomgranot
  version: "1.2"
  category: audit-planning

View original text

---
name: audit-api-usage
description: "Inventory the integrations, service keys, legacy private apps, and internal tooling that call HubSpot APIs, and flag anything on legacy v1-v4 endpoints or legacy app architecture ahead of HubSpot's 2027 cutoffs. Produces a migration checklist to date-based API versions and service keys."
license: MIT
metadata:
  author: tomgranot
  version: "1.2"
  category: audit-planning
---

# Audit API Usage Before the 2027 Cutoffs

In March 2026 HubSpot replaced semantic API versioning (v1-v4) with date-based versions (`/2026-09/`-style paths, two releases a year, at least 18 months of support each). Two clocks are now running: **v4 loses support on March 30, 2027**, and **v1-v3 are already unsupported, with enforcement in September 2027**. Separately, HubSpot is retiring legacy private apps in favor of service keys. This skill inventories what in your stack calls HubSpot and produces a migration checklist for both.

## Why This Matters

The deadline fails quietly: unsupported APIs "no longer receive updates, bug fixes, or stability guarantees," and marketplace apps that don't migrate risk losing certification. A portal typically has more callers than anyone remembers — service keys, legacy private apps, marketplace apps, middleware (Zapier/Make), form embeds, internal scripts, data warehouse syncs. Finding them takes an afternoon now or an incident later.

## Key Facts

| Fact | Detail |
|------|--------|
| Current version | `2026-09` (for example `/crm/objects/2026-09/contacts`) |
| Release cadence | March and September, every year; each version is immutable |
| Support lifecycle | At least 18 months per version |
| v4 end of support | **March 30, 2027** |
| v1-v3 status | **Unsupported since September 15, 2026** (no bug fixes, reliability, or security updates); enforcement **September 2027** |
| Legacy private apps | Creation disabled **October 26, 2026** for existing accounts (September 28, 2026 for new ones). Existing apps keep working and must migrate by September 2027 |
| Replacement for private apps | **Service keys** (Settings > Integrations > Service Keys): bearer tokens for REST calls, no webhooks |
| Also deprecated | Legacy v1 OAuth API (token issuance/introspection) |
| Behavior change in `2026-09` | CRM writes enforce admin-configured required and conditionally required properties, returning HTTP 400 where v3 accepted the write |

Sources: HubSpot developer changelog, "Introducing date-based API versioning" (2026-03-30), "Deprecating support for HubSpot v4 APIs" (2026-05-21), "Legacy private app creation sunset" (2026-08-27), and "Legacy APIs and legacy apps: what's going unsupported and when" (2026-09-15). Re-check these before quoting dates to stakeholders; HubSpot has moved sunset dates before.

## Prerequisites

- Super Admin access (to view Integrations settings and app logs)
- Optionally: a service key or existing legacy private app token (`HUBSPOT_ACCESS_TOKEN` in `.env`) for the account-level usage query
- Access to the source code of any internal integrations

## Execution Pattern

### Stage 1: Plan

Confirm with the user: which systems are known to touch HubSpot (CRM syncs, website forms, analytics pipelines, internal scripts), and who owns each.

### Stage 2: Before — Build the Caller Inventory

Work through each discovery source and record every caller in a checklist (owner, what it does, endpoints/versions used):

1. **Legacy private apps and service keys**: Settings > Integrations > Private Apps, and Settings > Integrations > Service Keys. Open each legacy app > **Logs**: the API call log shows the exact request paths (`/crm/v3/...`, `/contacts/v1/...`), which reveal the version in use. Record every legacy private app as a migration item in its own right, whatever endpoints it calls.
2. **Connected/marketplace apps**: Settings > Integrations > Connected Apps. You can't see their internals; note each vendor — certified apps are being pushed to migrate by HubSpot, but confirm with the vendor for anything business-critical.
3. **Internal codebases**: grep for version-revealing patterns:
   ```bash
   grep -rEn "api\.hubapi\.com/[a-z-]+/v[0-9]|/contacts/v1|/email/public/v1|hubapi.com/automation/v[23]" .
   ```
4. **Middleware** (Zapier, Make, Workato, n8n): platform-managed connectors migrate on the vendor's schedule; custom HTTP steps inside them do not — check those by hand.
5. **Account-wide API usage** (optional script check): the account-info API reports daily API usage totals for privately distributed apps:
   ```python
   resp = requests.get(f"{BASE}/account-info/v3/api-usage/daily", headers=HEADERS)
   ```
   This confirms *how much* traffic flows, not which versions — use the per-app logs from step 1 for version detail.

### Stage 3: Execute — Classify and Plan Migrations

For every caller, classify:

| Status | Meaning | Action |
|--------|---------|--------|
| **Red** | Calls v1/v2 legacy endpoints (e.g., `/contacts/v1/`, `/email/public/v1/`, forms v2) or legacy OAuth v1 | Migrate now. Many of these have already been shut off (Contact Lists v1 returns 404 since April 30, 2026; Pipelines v1 sunsets December 4, 2026) |
| **Amber (v4)** | Calls `/v4/` endpoints, such as `/automation/v4/flows` or `/crm/v4/` associations | Supported until 2027-03-30; migrate to date-based paths before then |
| **Amber (v3)** | Calls `/v3/` endpoints | Already unsupported, still working; migrate to `2026-09` date-based paths before September 2027 |
| **Amber (app)** | Runs on a legacy private app token, whatever it calls | Move to a service key before September 2027 |
| **Green** | Calls date-based paths with a service key or a projects-based app, or vendor-managed and confirmed migrating | Monitor |

For amber/red internal code, the migration is usually mechanical: same resources, new path shape (`/crm/v3/objects/contacts` becomes `/crm/objects/2026-09/contacts`) and sometimes renamed fields. HubSpot's migration guide says many v3 contracts carry over unchanged but not all, so test each endpoint rather than assuming. Batch the work per codebase, not per endpoint.

Test writes in particular. From `2026-09`, a create or update that omits a property an admin marked required is rejected with `MISSING_REQUIRED_PROPERTY` or `MISSING_CONDITIONAL_REQUIRED_PROPERTY`. An integration that wrote sparse records through v3 will start failing after migration unless it sends those properties.

This repo's own scripts are **amber**: they target `/crm/v3/`, `/marketing/v3/`, and `/automation/v4/`. They work today, and they are on the migration list in `CONTRIBUTING.md` like everyone else's.

### Stage 4: After

1. Every caller in the inventory has a status and an owner.
2. Red items have migration tickets with dates; v4 callers are scheduled before 2027-03, v3 callers and legacy private apps before 2027-09.
3. Re-run this audit every 6 months — each March/September release starts a new support clock.

## Rollback

Read-only — nothing to roll back.

## Technical Gotchas

1. **App logs are the ground truth.** Code greps miss dynamically-built URLs; the per-app request logs in Settings show what is actually being called.
2. **404 vs 403 vs unsupported.** After end of support, endpoints may keep working for a while — "unsupported" means no fixes or guarantees, not an instant shutoff. Do not treat "it still works" as "we're fine."
3. **You cannot create a new private app as a stopgap.** After October 26, 2026 the option is gone for existing accounts. A new internal integration needs a service key from day one.
4. **Service keys do not receive webhooks.** An integration that relies on webhook subscriptions needs a projects-based app, not a service key.
5. **OAuth is part of this.** Apps using legacy v1 OAuth token endpoints must move to the date-based OAuth API even if their data endpoints are current.
6. **SDK versions pin API versions.** If an integration uses an official HubSpot SDK, the SDK's major version determines which API version it calls — check the SDK changelog, not just your code.

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Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
The Python snippet for account-wide API usage references `BASE` and `HEADERS` without showing their definitions, so an agent must infer the correct base URL and authorization header format.
The skill relies heavily on HubSpot-specific dates and UI navigation paths that will become stale over time; while it warns to re-check, the embedded dates are stated as facts and should be clearly marked as time-sensitive.
There is no explicit instruction to redact or limit exposure of sensitive information found in app logs when generating the audit checklist.
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 76 GitHub stars
Stars/forks activity: 76 stars, 17 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

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Source & usage notes

IndexedAI Reviewed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: TomGranot/hubspot-admin-skills
License: MIT
Version: 1.2
Last GitHub push: Oct 13, 2026
Registry updated: Oct 15, 2026
Instruction path: skills/audit-api-usage/SKILL.md @ 15db04633834

Version reported in registry metadata; check source releases before relying on it.

Quality

66/100

Promising

Trust

53/100

Do not auto-install

Audit

73/100

Needs review

Open full audit View eval report

Dependency or permission surface needs review
Permission surface may require sandboxing
The Python snippet for account-wide API usage references `BASE` and `HEADERS` without showing their definitions, so an agent must infer the correct base URL and authorization header format.
The skill relies heavily on HubSpot-specific dates and UI navigation paths that will become stale over time; while it warns to re-check, the embedded dates are stated as facts and should be clearly marked as time-sensitive.
There is no explicit instruction to redact or limit exposure of sensitive information found in app logs when generating the audit checklist.
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 76 GitHub stars
Stars/forks activity: 76 stars, 17 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

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      "reason": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
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    "best_for": [
      "other",
      "agent-skill"
    ],
    "known_risks": [
      "The Python snippet for account-wide API usage references `BASE` and `HEADERS` without showing their definitions, so an agent must infer the correct base URL and authorization header format.",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 76 GitHub stars",
      "Stars/forks activity: 76 stars, 17 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"
    ]
  },
  "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": 73,
    "risk_level": "needs_review",
    "risk_label": "Needs review",
    "warnings": [
      "Dependency or permission surface needs review",
      "Permission surface may require sandboxing",
      "The Python snippet for account-wide API usage references `BASE` and `HEADERS` without showing their definitions, so an agent must infer the correct base URL and authorization header format.",
      "The skill relies heavily on HubSpot-specific dates and UI navigation paths that will become stale over time; while it warns to re-check, the embedded dates are stated as facts and should be clearly marked as time-sensitive.",
      "There is no explicit instruction to redact or limit exposure of sensitive information found in app logs when generating the audit checklist.",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 76 GitHub stars"
    ]
  },
  "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": "Data, BI, and analytics",
    "scenario": "Database and SQL",
    "maintenance": "5d 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 Python snippet for account-wide API usage references `BASE` and `HEADERS` without showing their definitions, so an agent must infer the correct base URL and authorization header format.",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "The skill relies heavily on HubSpot-specific dates and UI navigation paths that will become stale over time; while it warns to re-check, the embedded dates are stated as facts and should be clearly marked as time-sensitive.",
    "There is no explicit instruction to redact or limit exposure of sensitive information found in app logs when generating the audit checklist."
  ],
  "agent_contract": {
    "task_input": "Use audit-api-usage 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: 61/100 Manual review",
      "Audit: 73/100 Needs review",
      "Safety: 25/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "tomgranot-audit-api-usage (audit-api-usage)",
      "install_command": "npx skills add TomGranot/hubspot-admin-skills --skill audit-api-usage",
      "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": "tomgranot-audit-api-usage",
      "task": "Use audit-api-usage 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/tomgranot-audit-api-usage",
    "api": "https://www.openagentskill.com/api/agent/skills/tomgranot-audit-api-usage",
    "audit": "https://www.openagentskill.com/skills/tomgranot-audit-api-usage/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=tomgranot-audit-api-usage&task=Use%20audit-api-usage%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20audit-api-usage%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20audit-api-usage%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/tomgranot-audit-api-usage/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/tomgranot-audit-api-usage"
  }
}

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Creator: tomgranot
Source: TomGranot/hubspot-admin-skills
Indexed by: OpenAgentSkill community index

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Overview

Audit API Usage Before the 2027 Cutoffs

Why This Matters

Key Facts

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Execution Pattern

Stage 1: Plan

Stage 2: Before — Build the Caller Inventory

Stage 3: Execute — Classify and Plan Migrations

Stage 4: After

Rollback

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