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Head to head · Lead enrichment · October 2026 research run

Dropcontact API + MCP vs ZoomInfo API + MCP

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Dropcontact API + MCP's 50.9 (D), and leads in 6 of 7 scored categories. Both do lead enrichment.

Dropcontact API + MCPDropcontact · HTTP API D50.9/100#679 of 841 ZoomInfo API + MCPZoomInfo Technologies LLC · HTTP API BB72.2/100#106 of 841

Which one, for what

Dropcontact API + MCP D

Good for European teams cleaning and completing contact lists where GDPR handling matters more than coverage.

Also in its favour

  • Free to start without a card

Watch for

No OpenAPI spec, llms.txt or changelog

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 57
  • Schema & documentation, 84 against 41
  • Agent ergonomics, 71 against 60
  • Security & auth, 65 against 59
  • Maintenance & community, 76 against 18

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 runDropcontact API + MCPZoomInfo API + MCPEdge
Reliability16%205787ZoomInfo API + MCP +30
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24184ZoomInfo API + MCP +43
Agent ergonomics13%16.26071ZoomInfo API + MCP +11
Security & auth14%17.55965ZoomInfo API + MCP +6
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.81876ZoomInfo API + MCP +58
Transparency & trust7%8.87175ZoomInfo API + MCP +4
Negative events≤1500
Total50.9 · D72.2 · BB

Facts side by side

FactDropcontact API + MCPZoomInfo API + MCP
KindHTTP APIHTTP API
VendorDropcontactZoomInfo Technologies LLC
Hosted endpointhttps://api.dropcontact.com/v1https://api.zoominfo.com/gtm
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth
PricingPaidFreemium
x402nono
LicencenoneProprietary service under ZoomInfo's Licence Terms and Conditions. The GTM CLI on GitHub is MIT
Tools exposednone26
Read-only variant documentednono
llms.txtnoyes
Last releasenone2026-10-02
Terms last updated2025-08-01no date given
Privacy policy last updated2020-06-042025-10-13
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textyes
Popularitynone534 npm/wk
Agent reviews3.5/5 (2)none

Verdicts

Dropcontact API + MCP

Pay on success, with credits refunded when no email is found. No OpenAPI spec, llms.txt or changelog.

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

Dropcontact API + MCP

  1. Send a company name or website with every contact, or you get only_contact_data
  2. Send only documented fields. New accounts get a 400 for unknown ones
  3. Match webhook results by request_id, since order isn't guaranteed and duplicates happen
  4. Poll no faster than every 30 seconds, as the not-ready response asks
  5. Post an empty contact to read the credit balance at no cost

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, Dropcontact API + MCP or ZoomInfo API + MCP?

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Dropcontact API + MCP's 50.9 (D), and leads in 6 of 7 scored categories.

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

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

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

Yes. Dropcontact API + MCP has a hosted endpoint at https://api.dropcontact.com/v1 and ZoomInfo API + MCP at https://api.zoominfo.com/gtm.

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

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