Largest US-centric B2B contact/company database (100M+ companies, 500M+ professionals, 50+ signals) now sold headless as 'GTM AI by ZoomInfo': OAuth REST API at api.zoominfo.com/gtm, official MCP server, CLI, free search and pay-per-enrich credits. Best for free search/lookup/lookalikes before paying: credits only on enrich.
The actions you pay for, as ZoomInfo prices them in credits.
| Action | Cost | Per |
|---|---|---|
| Search / lookup / find similar / recommended contacts | Free | per call |
| Enrich company or contact (or unlock intent record) | 1 data credit | per new record (API up to 25 per call, MCP up to 10); free re-enrich for 12 months under Records Under Management |
| Data credit (self-serve) | $0.38 | per credit at $1,000 spend tier |
| AI credit (account/contact research, agents) | $0.05 | per credit; pricing page: ~1-20 credits per AI action, account research ~9-12; MCP credits doc: Account/Contact Research most calls 5-15, Conversation Intelligence at least 9 |
| Load a record into a GTM Studio audience (Upsert Audience / Manage Audience Rows) | 1 data credit | per new matched record; unmatched own-data rows free |
US dollars, as ZoomInfo's pricing page shows them on 25 Oct 2026. Monthly and annual billing are shown apart.
Free tier GTM AI Free: 1,000 data credits + 1,000 AI credits at signup, no credit card; MCP + API + CLI access (5 apps), 5 req/sec, audiences 5 x 500 rows; free search, lookup, find similar
$0
Free
1,000 data + 1,000 AI credits free; top-ups from $20; data credits $0.38 each at the $1,000 spend tier (5,000 credits listed at $1,900 before a 70% first-purchase promo, $570 after); AI credits $0.05 flat
Top-up packs, no contract, no seats
Custom quote
Annual volume + bonus credits; Records Under Management; unlimited apps; custom rate limits; audience waterfall (25+ vendors); mobile phone data; SSO/SAML; SLA support
Annual volume
One-off pack
Quote only; predetermined monthly credits per package
Credits can be added
Custom quote
Quote only
Custom quote
Quote only; lists 'Custom integrations'
75K included credits; 25 intent topics
100 intent topics
Custom quote
150K included credits; unlimited intent topics
Per tenant, three simultaneous windows (per-second, sliding per-hour, sliding per-day).
Rejected requests do not consume quota. Headers X-RateLimit-Limit-/Remaining-Second|Hour|Day; on 429: Retry-After, X-RateLimit-Rejected-Bucket, X-RateLimit-Reset. Legacy X-RateLimit-Limit/Remaining removed 2027-01-01. Search returns up to 25 records per request via API, 10 via MCP/CLI.
ZoomInfo uses OAuth. The steps below follow ZoomInfo's own docs.
https://api.zoominfo.com/gtm/oauth/v1/token (client_credentials with Basic auth, or Authorization Code + PKCE with refresh tokens). Scopes such as api:data:contact, api:data:company, api:data:intent, api:data:news, api:data:scoops.curl -X POST "https://api.zoominfo.com/gtm/data/v1/contacts/search" \
-H "Authorization: Bearer $ZOOMINFO_ACCESS_TOKEN" \
-H "Content-Type: application/json" \
-d '{}'| What | Where |
|---|---|
| Documentation | docs.gtm.ai/docs/overview |
| API reference | docs.gtm.ai/reference/api-overview |
| OpenAPI spec | docs.zoominfo.com/openapi.md |
| llms.txt | docs.gtm.ai/llms.txt |
| Changelog | gtm.ai/llms.txt |
| Base URL | https://api.zoominfo.com/gtm |
| MCP server | https://mcp.zoominfo.com/mcp |
| SDKs | @zoominfo/gtm-ai-cli (npm) / brew zoominfo/gtm-ai/gtm-ai-cli (gtm CLI), OpenAPI spec for SDK generation, Legacy: PKI/username auth libraries for Java, Python, NodeJS on github.com/Zoominfo |
https://api.zoominfo.com/gtm, version v1.0, OAuth 2.0. Legacy Enterprise API (api-docs.zoominfo.com, PKI/username JWT auth, 1-hour tokens) is being deprecated.Other Sourcing tools in this directory, each with its own review.
Best for sizing an ICP for almost nothing: People Preview costs 1 credit per page of up to 100.
AI Ark API reviewBest for people search at 0 credits on paid plans to size and pull prospect lists.
Apollo API reviewBest for high-volume list building at a flat monthly price.
BlitzAPI API reviewFour things to settle first, each read off ZoomInfo's own pages.
https://api.zoominfo.com/gtm/oauth/v1/token (client_credentials with Basic auth, or Authorization Code + PKCE with refresh tokens). Scopes such as api:data:contact, api:data:company, api:data:intent, api:data:news, api:data:scoops..https://api.zoominfo.com/gtm, version v1.0, OAuth 2.0. Legacy Enterprise API (api-docs.zoominfo.com, PKI/username JWT auth, 1-hour tokens) is being deprecated.Tell us what you want ZoomInfo to do in your stack. We will show you how we would wire it into your data, outbound or CRM, and what we would check first.
Read from gtm.ai/pricing, docs.gtm.ai/reference/api-overview and docs.gtm.ai/docs/rate-limits. Verified 25 Oct 2026.
| Method | Path | What it does | Cost |
|---|---|---|---|
| POST | /data/v1/contacts/search | Search contacts (preview records with has* flags, accuracy score, DNC flags) | Free (no credits, no record limit); counts against rate and request limits |
| POST | /data/v1/companies/search | Search companies by firmographics, technology, location, etc. | Free |
| POST | /data/v1/intent/search | Search intent signals across companies | 0 credits; each intent signal returned counts as a Record and the response as a Request; requires Intent SKU |
| POST | /data/v1/news/search | Search news articles | Free (does not consume credits) |
| POST | /data/v1/scoops/search | Search Scoops (business events) across companies | Free (does not consume credits) |
| POST | /data/v1/contacts/enrich | Enrich up to 25 contacts (by personId, or email/phone/name+company match) | 1 data credit per new contact record not already Under Management (12 months); no charge on no-match/error; every enriched record counts against record limit; LIMIT_EXCEEDED when credits exhausted |
| POST | /data/v1/companies/enrich | Enrich up to 25 companies (id, domain, name, ticker, website) | 1 data credit per new company record not Under Management |
| POST | /data/v1/companies/corporate-hierarchy/enrich | Corporate hierarchy for up to 25 companies | 1 credit per record returned unless Under Management; none on NoMatch |
| POST | /data/v1/companies/org-chart/enrich | Org chart contacts for a company by department | A credit counted for the enriched company, when applicable |
| POST | /data/v1/companies/technologies/enrich | Technologies installed at a company | 1 credit for the enriched company; company counts as a Record |
| POST | /data/v1/companies/hashtags/enrich | Predefined hashtags for a company | 1 credit for the enriched company |
| POST | /data/v1/intent/enrich | Intent signals for one company | Bulk data credits; requires Intent SKU |
| POST | /data/v1/news/enrich | News for one company | 1 credit for the company if applicable; each article counts as a Record |
| POST | /data/v1/scoops/enrich | Scoops for one company | 1 credit for the company if applicable; each scoop counts as a Record |
| GET | /data/v1/lookup/{fieldName} | Valid filter values (industries, metros, management levels, departments, intent topics, tech vendors/products) | Free |
| GET | /data/v1/lookup/search | Available search fields by entity | Free (Lookup listed free on the credit table; no charge stated on the reference page) |
| GET | /data/v1/lookup/enrich | Available enrich output fields by entity | Free (Lookup listed free on the credit table; no charge stated on the reference page) |
| GET | /data/v1/users/usage | Current user's API usage and limits | Free |
| POST | /copilot/v1/companies/insights | Sales signals (funding, leadership changes, intent spikes, hiring anomalies) for up to 50 companies by type | Not stated |
| GET | /copilot/v1/companies/lookalikes | Find similar companies | Free |
| GET | /copilot/v1/contacts/lookalikes | Find similar contacts | Free |
| GET | /copilot/v1/contacts/recommendations | Recommended outreach-ready contacts for an account | Free |
| GET/POST | /copilot/v1/companies/{companyId}/account-summary (+ /actions/ask) | AI account summary and Q&A on it | Not stated on reference page. MCP Account Research (the AI equivalent) costs most calls 5 to 15 AI credits |
| GET/POST/DELETE | /copilot/v1/{customer-buyer-personas|customer-competitors|ideal-company-profile|products|customer-settings}[/{id}][/actions/archive|unarchive] | Context API: manage buyer personas, competitors, ICPs, products/services, settings that drive lookalikes and recommendations (grouped, ~27 operations) | Not stated |
| GET/POST/PATCH/DELETE | /studio/v1/{folders|audiences}[/{id}], /studio/v1/audiences/{id}/{columns|rows}/... | GTM Studio audiences: folders, audiences, columns, rows (upsert up to 50 sync; bulk upsert up to 500 per call), filter metadata, match criteria (grouped, ~20 operations) | Structure calls free; loading records costs 1 data credit per NEW record loaded into an audience (own-data rows charged only when they match a ZoomInfo record; unmatched rows free). Free tier: 5 audiences x 500 rows |
| POSTasync | /studio/v1/audiences/{audienceId}/actions/enrich | Async enrichment of an audience (scope AUDIENCE or ROW) | Not stated on reference page (data credits presumably apply) |
| GET | /studio/v1/audiences/{audienceId}/jobs/{jobId} | Poll async audience job status | Free |
| GET/POST/PUT/DELETE | /marketing/v1/audiences[/{id}][/uploads[/{uploadId}]] | Marketing API audiences and uploads (grouped, 7 operations) | Not stated |
| GET/POSTasync | /platform/v1/exports, /exports/{exportId}, /exports/{exportId}/actions/execute, /exports/executions/{executionId} | Data exports: list, inspect, execute against person or company IDs (async, 202 PENDING), poll status | Not stated |
| GET/POST/DELETE | /platform/v1/engagements/content-interactions[/{id}] | Engagements (beta): upsert/get/delete content interaction records | Not stated |
| GET/POSTasync | /agent/v1/agents[/{agentId}][/runs[/{runId}]][/stream] | Agent API: list agents, get inputs, start runs (async or SSE stream), list/get runs, resume stream (7 operations) | Not stated (AI credits likely; see pricing) |
| POST | /data-quality/v1/prepare | Parse/validate/normalize phones, emails, addresses, job titles, names in bulk | Not stated |
| GET/POST/PATCH/DELETE | /data-quality/v1/{prepare/normalize|score|segment}/configs[/{configId}], /score/actions/run, /segment/actions/run | Data Quality: normalize, score and segment configs and synchronous batch runs (grouped, 17 operations) | Not stated |
| POST | https://api.zoominfo.com/gtm/oauth/v1/token | OAuth token (client_credentials; PKCE authorization code and refresh flows also supported) | Free |
No endpoint matches that filter.
