Get an audit

Head to head · Support notes · October 2026 research run

HelpDesk vs Missive API + MCP

Missive API + MCP scores 54.3 (C) on agent readiness against HelpDesk's 50.3 (D), and leads in 3 of 7 scored categories. HelpDesk leads on schema & documentation and payments & pricing. Both do support notes.

Best customer support and helpdesk APIs for AI agents · All 153 support comparisons

HelpDeskText, Inc. · HTTP API D50.3/100#774 of 950 Missive API + MCPMissive · HTTP API C54.3/100#689 of 950

Which one, for what

HelpDesk D

Good for A team already on HelpDesk or Text that wants an agent to read queues, draft replies, add private notes and change status over REST.

Ahead on

  • Schema & documentation, 63 against 52
  • Payments & pricing, 35 against 30

Watch for

No rate limit, 429 behaviour or idempotency key found in the API description or Text's docs

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

  • Security & auth, 61 against 50
  • Maintenance & community, 60 against 39
  • Transparency & trust, 77 against 67

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 runHelpDeskMissive API + MCPEdge
Reliability16%206060even
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26352HelpDesk +11
Agent ergonomics13%16.24746HelpDesk +1
Security & auth14%17.55061Missive API + MCP +11
Payments & pricing10%12.53530HelpDesk +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83960Missive API + MCP +21
Transparency & trust7%8.86777Missive API + MCP +10
Negative events≤15-20
Total50.3 · D54.3 · C

Facts side by side

FactHelpDeskMissive API + MCP
KindHTTP APIHTTP API
VendorText, Inc.Missive
Hosted endpointhttps://api.helpdesk.comhttps://public.missiveapp.com/v1
TransportsHTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
LicenceProprietary service under Text's Terms of UseProprietary service under Missive's Terms and Conditions
Read-only variant documentednono
llms.txtyesyes
Last releasenone2026-10-08
Terms last updatedno date given2024-04-15
Privacy policy last updatedno date given2026-03-27
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 benchmarkingyesnot found in the text
Terms or service can change without noticeyesyes
Arbitration or class-action waivernot found in the textnot found in the text

Verdicts

HelpDesk

The API covers the ticket workflow in 139 operations with a public OpenAPI 3.0.3 description, cursor pagination and about 39 list filters. No rate limit, error format or 429 handling was found in the reviewed documentation, and tokens carry no ticket-level scopes, so a token can do whatever its user's role allows.

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

HelpDesk

  1. Send Basic auth with the account ID as username and the personal access token as password, and always set a User-Agent header
  2. Create the token from a Viewer or Agent account when the task allows. A token inherits its creator's role, and only Administrators can change settings
  3. Reply or add a note through PATCH /v1/tickets/{ticketID} with message.text. Set isPrivate to true for an internal note, because the default sends to the requester
  4. Page /v1/tickets with next.value and next.ID from the last item, keep sortBy and order fixed, and pass silo to read archive, spam or trash
  5. Budget for metered calls. Text's docs count every request except those answered 500 against the plan's monthly API allowance

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, HelpDesk or Missive API + MCP?

Missive API + MCP scores 54.3 (C) on agent readiness against HelpDesk's 50.3 (D), and leads in 3 of 7 scored categories. HelpDesk leads on schema & documentation and payments & pricing.

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

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

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

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

Other comparisons with HelpDesk or Missive 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