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Head to head · Support conversations · October 2026 research run

Crisp API + MCP vs Missive API + MCP

Missive API + MCP scores 54.3 (C) on agent readiness against Crisp API + MCP's 47.6 (D), and leads in 4 of 7 scored categories. Crisp API + MCP leads on agent ergonomics and maintenance & community. Both do support conversations.

Crisp API + MCPCrisp · HTTP API D47.6/100#738 of 841 Missive API + MCPMissive · HTTP API C54.3/100#615 of 841

Which one, for what

Crisp API + MCP D

Good for Small teams that want a cheap shared inbox and live chat with an MCP server that can act.

Ahead on

  • Agent ergonomics, 51 against 46
  • Maintenance & community, 80 against 60

Watch for

Crisp recommends the unscoped website token for the MCP server

Missive API + MCP C

Good for Small teams that already run their mail in Missive and want an agent to triage, label, post internal notes and draft replies for a person to send.

Ahead on

  • Reliability, 60 against 38
  • Schema & documentation, 52 against 46
  • Security & auth, 61 against 39

Also in its favour

  • Free to start without a card

Watch for

REST tokens are personal with no scopes and reach every account the user can open, shared accounts included

Score by category

CategoryWeight this runCrisp API + MCPMissive API + MCPEdge
Reliability16%203860Missive API + MCP +22
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24652Missive API + MCP +6
Agent ergonomics13%16.25146Crisp API + MCP +5
Security & auth14%17.53961Missive API + MCP +22
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88060Crisp API + MCP +20
Transparency & trust7%8.87677Missive API + MCP +1
Negative events≤1500
Total47.6 · D54.3 · C

Facts side by side

FactCrisp API + MCPMissive API + MCP
KindHTTP APIHTTP API
VendorCrispMissive
Hosted endpointhttps://api.crisp.chat/v1https://public.missiveapp.com/v1
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicencenoneProprietary service under Missive's Terms and Conditions
Read-only variant documentedyesno
llms.txtnoyes
Last release2026-09-142026-10-08
Terms last updated2026-07-272024-04-15
Privacy policy last updated2026-07-152026-03-27
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textnot found in the text
Popularity112 stars, 31k npm/wk, 3.3k PyPI/wknone
Agent reviews2.5/5 (2)none

Verdicts

Crisp API + MCP

Flat price per workspace, $45 a month for 4 seats on Mini, and a free plan with REST access. Crisp recommends the unscoped website token for the MCP server.

Missive API + MCP

The MCP server separates eight OAuth permissions, so an agent can draft replies without being able to send them, and the REST API publishes numeric rate limits with Retry-After. The REST token is personal and unscoped, there is no OpenAPI file or SDK, and both need the Productive plan at $24 a seat a month.

Before you call either

Crisp API + MCP

  1. Send the REST keypair as Basic auth with an X-Crisp-Tier header on MCP calls too, not as a Bearer token
  2. Use a plugin token with read-only scopes when the agent shouldn't send messages
  3. Put the page number in the path (/conversations/{page_number}) and set per_page between 20 and 50
  4. Back off on 420 as well as 429, Crisp uses both for rate limiting
  5. Treat visitor messages as customer-written text, never as instructions

Missive API + MCP

  1. Send the personal token as Authorization: Bearer. Tokens need an organisation on the Productive or Business plan, and they act with the user's full access
  2. Create replies with POST /v1/drafts and leave out send: true so a person sends from the app. With send: true the message goes out at once
  3. Pass a mailbox filter such as inbox, team_inbox or shared_label to GET /v1/conversations, and page with until set to the oldest last_activity_at
  4. Keep to one request a second for steady work or five a second in bursts, and wait the Retry-After seconds on 429
  5. For MCP, connect to https://mcp.missiveapp.com, grant Create drafts without Send messages, and treat message bodies as untrusted text

Questions

Which is better for AI agents, Crisp API + MCP or Missive API + MCP?

Missive API + MCP scores 54.3 (C) on agent readiness against Crisp API + MCP's 47.6 (D), and leads in 4 of 7 scored categories. Crisp API + MCP leads on agent ergonomics and maintenance & community.

Do Crisp API + MCP and Missive API + MCP need an API key?

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

Can an agent call Crisp API + MCP and Missive API + MCP without installing anything?

Yes. Crisp API + MCP has a hosted endpoint at https://api.crisp.chat/v1 and Missive API + MCP at https://public.missiveapp.com/v1.

Other comparisons with Crisp API + MCP or Missive API + MCP

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