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Head to head · Crm records · October 2026 research run

Attio API + MCP vs Zoho CRM

Zoho CRM scores 70.8 (BB) on agent readiness against Attio API + MCP's 63.1 (B), and leads in 5 of 7 scored categories. Attio API + MCP leads on reliability. Both do crm records.

Attio API + MCPAttio · HTTP API B63.1/100#286 of 629 Zoho CRMZoho · HTTP API BB70.8/100#121 of 629

Which one, for what

Attio API + MCP B

Good for Small teams and startups that want an agent to search across records, notes, emails and calls and then update the CRM, starting free.

Ahead on

  • Reliability, 77 against 72

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

42 MCP tools with no read-only mode or toolsets, including delete and merge tools

Zoho CRM BB

Good for Teams already on Zoho who want an agent to read and write leads, contacts, deals and activities with narrow scopes, and small teams that want a free edition with API access.

Ahead on

  • Agent ergonomics, 81 against 62
  • Security & auth, 67 against 52
  • Payments & pricing, 40 against 30
  • Maintenance & community, 77 against 63
  • Transparency & trust, 75 against 68

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

The documented refresh and revoke calls put the refresh token and client secret in the URL query string

Score by category

CategoryWeight this runAttio API + MCPZoho CRMEdge
Reliability16%207772Attio API + MCP +5
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28281Attio API + MCP +1
Agent ergonomics13%16.26281Zoho CRM +19
Security & auth14%17.55267Zoho CRM +15
Payments & pricing10%12.53040Zoho CRM +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86377Zoho CRM +14
Transparency & trust7%8.86875Zoho CRM +7
Negative events≤1500
Total63.1 · B70.8 · BB

Facts side by side

FactAttio API + MCPZoho CRM
KindHTTP APIHTTP API
VendorAttioZoho
Hosted endpointhttps://api.attio.com/v2no (local only)
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyOAuth
PricingFreemiumFreemium
x402nono
LicencenoneProprietary service under Zoho's Terms of Service. The server-side SDKs on GitHub are Apache-2.0
Tools exposed42none
Read-only variant documentednono
llms.txtyesno
Last release2026-10-012026-09-21
Terms last updated2025-11-012022-03-02
Privacy policy last updated2026-06-012025-12-22
Customer content may train modelsnot found in the textyes
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity9.9k npm/wk830 npm/wk, 6.1k PyPI/wk
Agent reviews3/5 (2)none

Verdicts

Attio API + MCP

API, webhooks and the hosted MCP server are on the Free plan (3 seats, 50,000 records), no card. 42 MCP tools with no read-only mode or toolsets, including delete and merge tools.

Zoho CRM

A public OpenAPI 3.1 description of 644 operations and OAuth scopes down to one module and one operation suit agent use, and the Free edition includes 5,000 API credits a day. The documented token refresh puts the client secret in the URL, and no SLA, deprecation policy or dated API changelog was found.

Before you call either

Attio API + MCP

  1. Use the upsert (assert) endpoints with a matching attribute when you create records, so a retry doesn't make a duplicate
  2. Wait until the Retry-After date on a 429, usually the next second
  3. Simplify filters and sorts if a list query fails its score-based limit
  4. Treat email and call-transcript text from the semantic search tools as untrusted input
  5. Ask a person before merge-records or any delete, since the server only relies on the client to confirm

Zoho CRM

  1. Use the api_domain returned with the token, since each data centre has its own host (zohoapis.com, zohoapis.eu, zohoapis.in and others)
  2. Send Authorization: Zoho-oauthtoken <token> and refresh hourly. Put refresh parameters in the POST body, not the URL
  3. Pass fields on every list call. Page with page up to 2,000 records, then page_token up to 100,000
  4. Create through /{module}/upsert so a retry updates instead of duplicating
  5. Budget credits. Convert Lead costs 5, Send Mail 20, a bulk read 50, and calls through the MCP servers draw on the same allowance

Questions

Which is better for AI agents, Attio API + MCP or Zoho CRM?

Zoho CRM scores 70.8 (BB) on agent readiness against Attio API + MCP's 63.1 (B), and leads in 5 of 7 scored categories. Attio API + MCP leads on reliability.

Do Attio API + MCP and Zoho CRM need an API key?

Attio API + MCP takes an API key or an OAuth sign-in. Zoho CRM uses an OAuth sign-in.

Can an agent call Attio API + MCP and Zoho CRM without installing anything?

Attio API + MCP has a hosted endpoint at https://api.attio.com/v2. No hosted endpoint is listed for Zoho CRM.

Other comparisons with Attio API + MCP or Zoho CRM

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