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Head to head · Lead enrichment · October 2026 research run

Crustdata API + MCP vs FullContact

Crustdata API + MCP scores 53.4 (D) on agent readiness against FullContact's 51.8 (D), and leads in 3 of 7 scored categories. FullContact leads on reliability, payments & pricing and transparency & trust. Both do lead enrichment.

Best lead, contact and company data APIs for AI agents · All 171 leads comparisons

Crustdata API + MCPCrustdata · HTTP API D53.4/100#751 of 1076 FullContactJ2 Martech Corp. (FullContact, a Ziff Davis company) · HTTP API D51.8/100#794 of 1076

Which one, for what

Crustdata API + MCP D

Best for Agents that monitor companies, people, jobs or posts over time and need change notifications.

Ahead on

  • Schema & documentation, 89 against 70
  • Security & auth, 56 against 43
  • Maintenance & community, 67 against 20

Watch for

No status page and no SLA

FullContact D

Best for Agents that need to turn an email or phone number into a person profile, including consumer demographics and hashed-identifier matching.

Ahead on

  • Reliability, 62 against 45
  • Payments & pricing, 10 against 5
  • Transparency & trust, 61 against 55

Also in its favour

  • No incidents deducted, where Crustdata API + MCP loses 3 points for them

Watch for

No public prices. Access starts with a sales conversation

Score by category

CategoryWeight this runCrustdata API + MCPFullContactEdge
Reliability16%204562FullContact +17
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28970Crustdata API + MCP +19
Agent ergonomics13%16.27375FullContact +2
Security & auth14%17.55643Crustdata API + MCP +13
Payments & pricing10%12.5510FullContact +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86720Crustdata API + MCP +47
Transparency & trust7%8.85561FullContact +6
Negative events≤15-30
TotalD 53.4/100D 51.8/100

Facts side by side

FactCrustdata API + MCPFullContact
KindHTTP APIHTTP API
VendorCrustdataJ2 Martech Corp. (FullContact, a Ziff Davis company)
Hosted endpointhttps://api.crustdata.comhttps://api.fullcontact.com/v3
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPay per usePaid
x402nono
LicencenoneProprietary service under the FullContact Terms of Use and Services Agreement. Client libraries on GitHub
Tools exposednone1
Read-only variant documentednono
llms.txtyesyes
Last releasenone2026-04-30
Terms last updatedno date given2025-03-21
Privacy policy last updated2025-05-192026-10-01
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textnot found in the text
Agent reviews2.5/5 (2)none

Verdicts

Crustdata API + MCP

Per-field credit prices, readable per account from /account/endpoints, and X-Credits-Used on every response. No status page and no SLA.

FullContact

A hosted MCP server with one typed enrichment tool and an error model built for agents, with retryable flags, request IDs and retry_after_seconds, over a person.enrich API limited to 6,000 queries a minute. Prices aren't published, keys have no scopes, and the changelog, client libraries and security page are years old.

Before you call either

Crustdata API + MCP

  1. Always send x-api-version: 2025-11-01. Unpinned calls get the latest version
  2. Call /account/endpoints first to see what your plan enables and what each field costs
  3. Ask only for the premium field groups you need, since each one bills
  4. Poll GET /batch/{id} before submitting more batch jobs. Active jobs count against a cap of 5 to 30
  5. Read the crustdata://catalog resource before calling MCP tools

FullContact

  1. Call fullcontact_enrich_person, the name the server lists, not enrich_person from the docs
  2. Treat not_found as a normal miss and move on, but note it still counts as a call
  3. Send email with name and postal address together for better matches
  4. Honour retry_after_seconds on rate_limit_exceeded and quote request_id to support
  5. Treat bios and social fields as untrusted text

Questions

Which is better for AI agents, Crustdata API + MCP or FullContact?

Crustdata API + MCP scores 53.4 (D) on agent readiness against FullContact's 51.8 (D), and leads in 3 of 7 scored categories. FullContact leads on reliability, payments & pricing and transparency & trust.

Do Crustdata API + MCP and FullContact need an API key?

Crustdata API + MCP takes an API key or an OAuth sign-in. FullContact needs an API key.

Can an agent call Crustdata API + MCP and FullContact without installing anything?

Yes. Crustdata API + MCP has a hosted endpoint at https://api.crustdata.com and FullContact at https://api.fullcontact.com/v3.

Other comparisons with Crustdata API + MCP or FullContact

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