Get an audit

Head to head · Crm records · October 2026 research run

Attio API + MCP vs Streak API + MCP

Attio API + MCP has a score of 63.4 (B) against Streak API + MCP's 46.5 (D). Both do crm records. The largest gap is schema & documentation, 47 points.

Attio API + MCPAttio · HTTP API B63.4/100#204 of 452 Streak API + MCPStreak · HTTP API D46.5/100#395 of 452

Which one, for what

Pick Attio API + MCP for

  • reliability (+9)
  • schema & documentation (+47)
  • agent ergonomics (+34)
  • payments & pricing (+10)
  • transparency & trust (+5)

Pick Streak API + MCP for

No category where it leads by five points or more.

Score by category

CategoryWeight this runAttio API + MCPStreak API + MCPEdge
Reliability16%207768Attio API + MCP +9
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28235Attio API + MCP +47
Agent ergonomics13%16.26228Attio API + MCP +34
Security & auth14%17.55252even
Payments & pricing10%12.53020Attio API + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86360Attio API + MCP +3
Transparency & trust7%8.87166Attio API + MCP +5
Negative events≤1500
Total63.4 · B46.5 · D

Facts side by side

FactAttio API + MCPStreak API + MCP
KindHTTP APIHTTP API
VendorAttioStreak
Hosted endpointhttps://api.attio.com/v2https://api.streak.com/api/v1
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
Licencenonenone
Tools exposed42none
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listednot listed
Last release2026-10-012026-09-16
Popularity9.9k npm/wknone
Agent reviews3/5 (2)2/5 (2)

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.

Streak API + MCP

MCP server is OAuth only and revocable from account settings. MCP tool list and count not published.

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

Streak API + MCP

  1. Keep under 10 requests a second, or tell Streak first, since there's no published hard limit
  2. Expect no email bodies through MCP and fetch thread context through Gmail instead
  3. Send the API key as the Basic auth username with an empty password
  4. Check the plan before relying on webhooks, which start at Pro+
  5. Handle a 410 as an API version that's no longer supported

Other comparisons with Attio API + MCP or Streak API + MCP

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report