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Head to head · Crm records · October 2026 research run

Capsule CRM vs folk API + MCP

folk API + MCP scores 60.8 (C) on agent readiness against Capsule CRM's 55.7 (C), and leads in 4 of 7 scored categories. Capsule CRM leads on reliability. Both do crm records.

Capsule CRMZestia Limited · HTTP API C55.7/100#504 of 722 folk API + MCPfolk · HTTP API C60.8/100#384 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 55

Watch for

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

folk API + MCP C

Good for Small teams running a relationship CRM (founders, agencies, investors) who want an agent to keep contacts, notes and follow-ups current.

Ahead on

  • Schema & documentation, 91 against 48
  • Agent ergonomics, 70 against 59
  • Maintenance & community, 60 against 38
  • Transparency & trust, 81 against 75

Watch for

MCP server in open beta since 1 July 2026

Score by category

CategoryWeight this runCapsule CRMfolk API + MCPEdge
Reliability16%208355Capsule CRM +28
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24891folk API + MCP +43
Agent ergonomics13%16.25970folk API + MCP +11
Security & auth14%17.54643Capsule CRM +3
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83860folk API + MCP +22
Transparency & trust7%8.87581folk API + MCP +6
Negative events≤1500
Total55.7 · C60.8 · C

Facts side by side

FactCapsule CRMfolk API + MCP
KindHTTP APIHTTP API
VendorZestia Limitedfolk
Hosted endpointhttps://api.capsulecrm.com/api/v2https://api.folk.app/v1
TransportsHTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicenceProprietary service under Capsule's Customer Termsnone
Tools exposednone38
Read-only variant documentedyesyes
llms.txtnoyes
Last release2026-09-252026-09-15
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 textnot found in the text
Agent reviewsnone3.5/5 (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.

folk API + MCP

Dated API versions, a year's support and 6 months' deprecation notice with Deprecation and Sunset headers. MCP server in open beta since 1 July 2026.

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

folk API + MCP

  1. Send X-API-Version: 2025-06-09 on every REST call
  2. Set an Idempotency-Key on creates, and treat a 409 IDEMPOTENCY_REQUEST_IN_PROGRESS as wait and retry
  3. On a 429, wait until details.retryAfter, and remember all your keys share one 600-a-minute budget
  4. Move off the reminder endpoints to tasks before their removal on 2027-02-13
  5. Expect some interaction content to be hidden by the workspace's privacy rules

Questions

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

folk API + MCP scores 60.8 (C) on agent readiness against Capsule CRM's 55.7 (C), and leads in 4 of 7 scored categories. Capsule CRM leads on reliability.

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

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

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

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

Other comparisons with Capsule CRM or folk API + MCP

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