HubSpot CRM API

Full-featured CRM REST API for managing contacts, companies, deals, pipelines, and marketing workflows across the HubSpot platform.

Evaluated Mar 06, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Other hubspot crm contacts deals pipelines workflows inbound-marketing rest-api sdk

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

100

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Private App tokens are scoped and revocable. OAuth2 flow supports refresh tokens. HTTPS enforced on all endpoints. HIPAA available on Enterprise tier.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

An agent needs deep CRM automation across contacts, deals, and marketing workflows on the HubSpot platform.

Avoid When

You only need simple contact storage and don't need HubSpot's full marketing/sales suite.

Use Cases

• Syncing contact and company records from external sources into HubSpot CRM
• Creating and updating deals through pipeline stages based on agent-detected signals
• Enrolling contacts into HubSpot workflows triggered by agent events
• Querying deal pipeline status to generate sales forecasting reports
• Associating objects (contacts to companies, deals to contacts) to maintain relationship graphs

Not For

• Lightweight CRM needs where HubSpot's complexity and pricing are overkill
• Real-time bidirectional sync requiring sub-100ms latency
• Teams that need a self-hosted or open-source CRM solution

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

SDK

Yes

Webhooks

Yes

OpenAPI Spec ↗

Authentication

Methods: api_key oauth2 private_app_token

OAuth: Yes Scopes: Yes

Private App tokens (recommended for agents) replace legacy API keys. OAuth2 for user-facing apps. Scopes are granular per object type (crm.contacts.read, crm.deals.write, etc.).

Pricing

Model: freemium

Free tier: Yes

Requires CC: No

Free tier has API access but low rate limits. Workflow and automation APIs require paid tiers. Cost can escalate quickly for large orgs.

Agent Metadata

Pagination

cursor

Idempotent

Partial

Retry Guidance

Documented

Known Gotchas

⚠ Multiple API versions coexist (v1, v2, v3) — always target v3 CRM APIs; legacy endpoints behave differently
⚠ Association API is separate from object APIs; agents must make additional calls to link contacts, companies, and deals
⚠ Rate limit headers use non-standard names (X-HubSpot-RateLimit-*); agents must parse carefully
⚠ Workflow enrollment via API requires the workflow to have an enrollment trigger set to 'API' — silent failures otherwise
⚠ Batch upsert for contacts uses email as unique key; duplicate emails can cause unexpected merge behavior

Alternatives

salesforce-api pipedrive-api close-api zoho-crm-api attio-api

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for HubSpot CRM API.

$99

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Scores are editorial opinions as of 2026-03-06.