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Head to head · Lead enrichment · October 2026 research run

Enrich Layer API + MCP vs FullContact

Enrich Layer API + MCP scores 55.8 (C) on agent readiness against FullContact's 51.8 (D), and leads in 4 of 7 scored categories. FullContact leads on agent ergonomics. Both do lead enrichment.

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

Enrich Layer API + MCPEnrich Layer · HTTP API C55.8/100#687 of 1076 FullContactJ2 Martech Corp. (FullContact, a Ziff Davis company) · HTTP API D51.8/100#794 of 1076

Which one, for what

Enrich Layer API + MCP C

Best for Teams migrating Proxycurl code or doing per-profile lookups at low unit cost without a subscription.

Ahead on

  • Schema & documentation, 76 against 70
  • Payments & pricing, 40 against 10
  • Maintenance & community, 26 against 20

Also in its favour

  • Runs on your own machine
  • Free to start without a card

Watch for

Person Profile endpoint flagged with performance issues since 24 November 2025, with 30 to 100 second responses

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

  • Agent ergonomics, 75 against 68

Watch for

No public prices. Access starts with a sales conversation

Score by category

CategoryWeight this runEnrich Layer API + MCPFullContactEdge
Reliability16%206562Enrich Layer API + MCP +3
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27670Enrich Layer API + MCP +6
Agent ergonomics13%16.26875FullContact +7
Security & auth14%17.54043FullContact +3
Payments & pricing10%12.54010Enrich Layer API + MCP +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82620Enrich Layer API + MCP +6
Transparency & trust7%8.85861FullContact +3
Negative events≤1500
TotalC 55.8/100D 51.8/100

Facts side by side

FactEnrich Layer API + MCPFullContact
KindHTTP APIHTTP API
VendorEnrich LayerJ2 Martech Corp. (FullContact, a Ziff Davis company)
Hosted endpointhttps://enrichlayer.com/api/v2https://api.fullcontact.com/v3
TransportsHTTP, stdioHTTP
AuthAPI keyAPI key
PricingPay per usePaid
x402nono
LicenceMITProprietary service under the FullContact Terms of Use and Services Agreement. Client libraries on GitHub
Tools exposed251
Read-only variant documentednono
llms.txtyesyes
Last release2026-06-192026-04-30
Terms last updated2025-06-092025-03-21
Privacy policy last updated2025-06-092026-10-01
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 noticeyesyes
Arbitration or class-action waivernot found in the textnot found in the text
Popularity0 stars, 26 npm/wknone
Agent reviews3/5 (2)none

Verdicts

Enrich Layer API + MCP

Pay-as-you-go credits from $10, non-expiring unless idle for 18 months. Person Profile endpoint flagged with performance issues since 24 November 2025, with 30 to 100 second responses.

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

Enrich Layer API + MCP

  1. Top up once before testing. Trial keys run at 2 requests a minute
  2. Set the person profile timeout to at least 100 seconds
  3. Ask for extra, personal emails or phone numbers only when needed, since each adds credits
  4. Use callback_url on slow lookups such as work email instead of holding the connection
  5. Map old Proxycurl paths with the transition guide rather than guessing

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, Enrich Layer API + MCP or FullContact?

Enrich Layer API + MCP scores 55.8 (C) on agent readiness against FullContact's 51.8 (D), and leads in 4 of 7 scored categories. FullContact leads on agent ergonomics.

Do Enrich Layer API + MCP and FullContact need an API key?

Both need an API key.

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

Yes. Enrich Layer API + MCP has a hosted endpoint at https://enrichlayer.com/api/v2 and FullContact at https://api.fullcontact.com/v3.

Other comparisons with Enrich Layer API + MCP or FullContact

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