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Head to head · Lead search · October 2026 research run

FullEnrich API + MCP vs ZoomInfo API + MCP

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against FullEnrich API + MCP's 59.6 (C), and leads in 6 of 7 scored categories. Both do lead search.

FullEnrich API + MCPFullEnrich · HTTP API C59.6/100#491 of 841 ZoomInfo API + MCPZoomInfo Technologies LLC · HTTP API BB72.2/100#106 of 841

Which one, for what

FullEnrich API + MCP C

Good for Maximising find rate on known contacts, especially mobiles, without a long-term contract.

Also in its favour

  • Free to start without a card

Watch for

Enrichment sources are third-party providers the vendor doesn't name

ZoomInfo API + MCP BB

Good for Sales and marketing agents that need company, contact, intent and business-event data from one vendor, with free search before paid enrichment.

Ahead on

  • Reliability, 87 against 60
  • Schema & documentation, 84 against 72
  • Agent ergonomics, 71 against 60
  • Security & auth, 65 against 55
  • Maintenance & community, 76 against 68
  • Transparency & trust, 75 against 64

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

The Licence Terms and Conditions bar disclosing benchmark results and automated access outside ZoomInfo's own tools without written approval

Score by category

CategoryWeight this runFullEnrich API + MCPZoomInfo API + MCPEdge
Reliability16%206087ZoomInfo API + MCP +27
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27284ZoomInfo API + MCP +12
Agent ergonomics13%16.26071ZoomInfo API + MCP +11
Security & auth14%17.55565ZoomInfo API + MCP +10
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86876ZoomInfo API + MCP +8
Transparency & trust7%8.86475ZoomInfo API + MCP +11
Negative events≤1500
Total59.6 · C72.2 · BB

Facts side by side

FactFullEnrich API + MCPZoomInfo API + MCP
KindHTTP APIHTTP API
VendorFullEnrichZoomInfo Technologies LLC
Hosted endpointhttps://app.fullenrich.com/api/v2https://api.zoominfo.com/gtm
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth
PricingFreemiumFreemium
x402nono
LicencenoneProprietary service under ZoomInfo's Licence Terms and Conditions. The GTM CLI on GitHub is MIT
Tools exposed1326
Read-only variant documentednono
llms.txtyesyes
MCP registryio.github.FullEnrich/fullenrichnot listed
Last release2026-08-272026-10-02
Terms last updated2026-08-20no date given
Privacy policy last updated2026-08-202025-10-13
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesyes
Popularitynone534 npm/wk
Agent reviews3.5/5 (2)none

Verdicts

FullEnrich API + MCP

Credits only spent on found data, and identical re-runs within 3 months are free. Enrichment sources are third-party providers the vendor doesn't name.

ZoomInfo API + MCP

Search, lookup and similar-record calls cost no credits, and a free account with 1,000 data and 1,000 AI credits needs no card. OAuth carries 20 scopes and limits are published per package. The Licence Terms and Conditions bar disclosing benchmark results, and the two documentation sites disagree on batch sizes and rate-limit headers.

Before you call either

FullEnrich API + MCP

  1. Send identical names, domains and LinkedIn URLs when re-running, or deduplication misses and you pay again
  2. Expect 30 to 90 seconds a contact. Use the webhook or poll get_enrichment_results
  3. Ask for mobiles only when needed. They cost 10 credits against 1 for a work email
  4. Call list_industries and list_seniorities before filtering search
  5. Use the 0-credit test contacts in the docs to check an integration

ZoomInfo API + MCP

  1. Call Lookup first and pass the returned IDs to Search. Unknown industry, metro or topic strings are rejected with a 422
  2. Search before Enrich. Search is free, and each newly enriched record costs one data credit
  3. Request only the scopes the task needs in the scope parameter of the token call. Omitting it grants every scope configured on the app
  4. On 429 read X-RateLimit-Rejected-Bucket and wait for Retry-After. An exhausted hourly window can mean a wait of several hundred seconds
  5. Turn off model training in the AI client before connecting the MCP server. ZoomInfo prohibits MCP data being used for training

Questions

Which is better for AI agents, FullEnrich API + MCP or ZoomInfo API + MCP?

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against FullEnrich API + MCP's 59.6 (C), and leads in 6 of 7 scored categories.

Do FullEnrich API + MCP and ZoomInfo API + MCP need an API key?

FullEnrich API + MCP takes an API key or an OAuth sign-in. ZoomInfo API + MCP uses an OAuth sign-in.

Can an agent call FullEnrich API + MCP and ZoomInfo API + MCP without installing anything?

Yes. FullEnrich API + MCP has a hosted endpoint at https://app.fullenrich.com/api/v2 and ZoomInfo API + MCP at https://api.zoominfo.com/gtm.

Other comparisons with FullEnrich API + MCP or ZoomInfo API + MCP

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