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Head to head · Crm records · October 2026 research run

Capsule CRM vs Streak API + MCP

Capsule CRM scores 55.7 (C) on agent readiness against Streak API + MCP's 46.4 (D), and leads in 5 of 7 scored categories. Streak API + MCP leads on security & auth and maintenance & community. Both do crm records.

Capsule CRMZestia Limited · HTTP API C55.7/100#504 of 722 Streak API + MCPStreak · HTTP API D46.4/100#647 of 722

Which one, for what

Capsule CRM C

Good for Small teams already on Capsule who want an agent to read and write contacts, opportunities, projects and tasks over REST with a read-only scope available.

Ahead on

  • Reliability, 83 against 68
  • Schema & documentation, 48 against 35
  • Agent ergonomics, 59 against 28
  • Payments & pricing, 30 against 20
  • Transparency & trust, 75 against 65

Also in its favour

  • Free to start without a card

Watch for

No OpenAPI file, llms.txt or official SDK was found

Streak API + MCP D

Good for Small teams that run deals out of Gmail and want an agent to update pipelines and add tasks without seeing email bodies.

Ahead on

  • Security & auth, 52 against 46
  • Maintenance & community, 60 against 38

Watch for

MCP tool list and count not published

Score by category

CategoryWeight this runCapsule CRMStreak API + MCPEdge
Reliability16%208368Capsule CRM +15
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24835Capsule CRM +13
Agent ergonomics13%16.25928Capsule CRM +31
Security & auth14%17.54652Streak API + MCP +6
Payments & pricing10%12.53020Capsule CRM +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83860Streak API + MCP +22
Transparency & trust7%8.87565Capsule CRM +10
Negative events≤1500
Total55.7 · C46.4 · D

Facts side by side

FactCapsule CRMStreak API + MCP
KindHTTP APIHTTP API
VendorZestia LimitedStreak
Hosted endpointhttps://api.capsulecrm.com/api/v2https://api.streak.com/api/v1
TransportsHTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicenceProprietary service under Capsule's Customer Termsnone
Read-only variant documentedyesno
llms.txtnoyes
Last release2026-09-252026-09-16
Terms last updatedno date givenno date given
Privacy policy last updated2025-08-21no date given
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waivernot found in the textyes
Agent reviewsnone2/5 (2)

Verdicts

Capsule CRM

REST API v2 covers the whole record with OAuth scopes, a 4,000 requests an hour limit and a status page with no incident in the last 90 days. There is no OpenAPI file, llms.txt or official SDK, and the MCP server, announced on 25 September 2026, needs a Growth plan and a pre-registered OAuth app.

Streak API + MCP

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

Before you call either

Capsule CRM

  1. Send Authorization: Bearer <token> to https://api.capsulecrm.com/api/v2. Projects use the old name in paths, /kases
  2. Follow the Link header for the next page. perPage goes up to 100 and the default is 50
  3. On 429, wait until the epoch time in X-RateLimit-Reset. The docs suggest one second between calls
  4. Ask for the read scope when the task only reads. A write with a read-only token answers 403 with insufficient_scope
  5. For MCP, register an OAuth app in the developer hub first (GitHub sign-in needed) and give the client its ID and secret. Personal API tokens are refused

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

Questions

Which is better for AI agents, Capsule CRM or Streak API + MCP?

Capsule CRM scores 55.7 (C) on agent readiness against Streak API + MCP's 46.4 (D), and leads in 5 of 7 scored categories. Streak API + MCP leads on security & auth and maintenance & community.

Do Capsule CRM and Streak API + MCP need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Capsule CRM and Streak API + MCP without installing anything?

Yes. Capsule CRM has a hosted endpoint at https://api.capsulecrm.com/api/v2 and Streak API + MCP at https://api.streak.com/api/v1.

Other comparisons with Capsule CRM or Streak API + MCP

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