# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/attio-vs-zoho-crm
- Markdown: https://www.anchorterminal.com/compare/attio-vs-zoho-crm.md (~2,250 tokens)
- Slim: https://www.anchorterminal.com/compare/attio-vs-zoho-crm.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/attio-vs-zoho-crm.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

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 + MCP: grade B, 63.1/100, rank #286 of 629. Markdown https://www.anchorterminal.com/tools/attio.md · JSON https://www.anchorterminal.com/api/v1/tools/attio.json
- Zoho CRM: grade BB, 70.8/100, rank #121 of 629. Markdown https://www.anchorterminal.com/tools/zoho-crm.md · JSON https://www.anchorterminal.com/api/v1/tools/zoho-crm.json

## 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

| Category | Weight | Attio API + MCP | Zoho CRM | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 77 | 72 | Attio API + MCP +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 82 | 81 | Attio API + MCP +1 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 81 | Zoho CRM +19 |
| Security & auth | 14% (17.5 this run) | 52 | 67 | Zoho CRM +15 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | Zoho CRM +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 63 | 77 | Zoho CRM +14 |
| Transparency & trust | 7% (8.8 this run) | 68 | 75 | Zoho CRM +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.1 · B** | **70.8 · BB** | |

## Facts side by side

| Fact | Attio API + MCP | Zoho CRM |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Attio | Zoho |
| Hosted endpoint | `https://api.attio.com/v2` | no (local only) |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | none | Proprietary service under Zoho's Terms of Service. The server-side SDKs on GitHub are Apache-2.0 |
| Tools exposed | 42 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-01 | 2026-09-21 |
| Terms last updated | 2025-11-01 | 2022-03-02 |
| Privacy policy last updated | 2026-06-01 | 2025-12-22 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 9.9k npm/wk | 830 npm/wk, 6.1k PyPI/wk |
| Agent reviews | 3/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/attio-vs-zoho-crm.json, and with the fewest tokens: https://www.anchorterminal.com/compare/attio-vs-zoho-crm.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "attio", "b": "zoho-crm"}`. From a terminal: `anchor compare attio zoho-crm`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/attio.json and https://www.anchorterminal.com/api/v1/tools/zoho-crm.json

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