FreeScout vs Plain API + MCP

FreeScout 35

No OpenAPI, Postman collection or other machine-readable contract found (0). No llms.txt (404) or Markdown docs (0). Each endpoint has a short description and parameter notes such as what imported and embed do (10 of 20). Parameters are marked required or optional with types, and few enums (8 of 15). curl, JavaScript and PHP examples for each endpoint, and a status-code table with an errorCode and errors body (12 of 15). Module versions and core releases are tagged, with no dated API changelog (5 of 15). 0 + 0 + 10 + 8 + 12 + 5 = 35.

Plain API + MCP 92

A downloadable GraphQL schema is the typed contract (25). llms.txt with about 1,000 links and Markdown pages (10). Reference pages for every query and mutation, and the MCP page labels each of its 32 tools read or write (15). GraphQL types, enums and non-null inputs throughout (15). MutationError returns a type, a code from a published list and per-field errors, with examples in the docs (14). A dated API changelog with entries on 10 days in September 2026, which lists breaking changes under Changed and removed. The GraphQL API itself isn't versioned, the webhooks are (13).

FreeScout 30

A global API key and personal keys that act with a user's permissions, sent in a header or Basic auth, with no scopes. The docs list an api_key query parameter as a way to authenticate, so 10 off (20 less 10, 10). Personal keys follow user roles, with no read-only key and no confirmation step for deletes (5 of 20). Conversations carry customer email, the security policy notes that external images in received email load by default, and no prompt-injection guidance was found (0). No API audit log found (0). SECURITY.md routes core reports through GitHub security advisories, CVEs are requested after fixes, and advisories are published, with no bug bounty or certification (15 of 20). 10 + 5 + 0 + 0 + 15 = 30.

Plain API + MCP 67

Machine users hold API keys with per-key fine-grained permissions such as customer:read, several keys per user for rotation without downtime. The MCP server uses OAuth as the signed-in user (30). Permissions let you make a read-only key, and MCP is bound by the user's role, with writes left to the client to confirm (16). Threads carry customer-written text and we found no injection guidance for the MCP server or API (0). Replies and notes are attributed to the machine user or person, and we found no audit log (5). Security at Plain, read on 1 November, states SOC 2 Type II with the report through trust.plain.com, and its responsible disclosure policy acknowledges reports within 48 hours and pays a bounty for confirmed high-severity vulnerabilities, amounts decided case by case. A valid security.txt. No public advisory record found (16; 14 on 1 October, when no bounty was found).

FreeScout 36

AGPL-3.0 core, and the module page says the module is AGPL-3.0 too (30). The software keeps data on the operator's server; the site's privacy policy was not read and no data-handling statement for the API was found (10 of 30). No deprecation policy or dated notices (0). No telemetry statement or opt-out found (5 of 20, since self-hosted data stays with the operator). 30 + 10 + 0 + 5 = 45.

Plain API + MCP 73

Closed service with published terms (15). The privacy policy was last updated August 2025 and doesn't cover data processed in the support platform, which falls under the Data Processing Addendum (updated 24 February 2026, effective 24 March 2026), which deletes or returns customer data at the end of processing. The AI and your data page, read on 1 November, says thread content goes to OpenAI and Anthropic only while its AI capabilities are on, neither trains on it, Plain is in OpenAI's zero data retention programme, and admins can turn AI off. The security page says inactive unpaid workspaces are deleted after 6 months with 14 days' warning. No retention periods for live support data (18; 10 on 1 October, when no AI training statement was found). Deprecated fields are marked in the schema and the SDK changelog explains each removal, but some removals followed their deprecation within days, and FeatureKey.DATA_IMPORTERS was removed on 23 October with no earlier notice (8). Data stored on AWS in eu-west-2 (London) per the security page, with US providers under standard contractual clauses. The DPA points to a sub-processor list in the trust centre, which we didn't read, while the security page says the list is in the DPA (10).

FreeScout 0

Self-hosted rule, with pricing scored on the paid module the API needs. No x402, MPP or L402 (0). The module's price is drawn by the store's script and could not be read, so it scores as not found (0). The core is free, but no free route to the API exists (0). A person buys the module in a browser and installs it (0). 0 + 0 + 0 + 0 = 0.

Plain API + MCP 30

No x402, MPP or L402 (0). Foundation $35 a month and Horizon $299 a month published, Frontier custom, with AI credits per plan and nothing per API call (10). 7-day trial with no card (20). A person signs up and creates a machine user and key in Settings (0).

FreeScout 50

Responses can be sized with embed (threads, timelogs, tags) and pageSize (12 of 25). Page and pageSize paging, with conversation filters by mailbox, folder, status, state, type, assignee, customer email and phone (16 of 20). Errors return a status code, an errorCode and a list of messages, with each code explained (14 of 20). The docs say a timed-out call is safe to retry; no idempotency keys for creates (3 of 20). No official SDK; few required parameters on most calls (5 of 15). 12 + 16 + 14 + 3 + 5 = 50.

Plain API + MCP 68

43 MCP tools on 1 November (29 read, 14 write), over the 30 line, with no toolsets (5). On the GraphQL side a caller picks every field it gets back, so we averaged the two (12). Cursor pagination and filters on threads and customers (20). Typed errors with codes, field errors and explicit retry guidance (20). MCP tools are labelled read or write and Plain says most clients will ask before running a write. assignThread takes onlyIfUnassigned and addLabels onlyIfNoLabels since 23 October, and no idempotency keys were found (8). One official SDK, for TypeScript (8).

FreeScout 70

Core v1.8.249 tagged on 31 October 2026 (30). Twelve tags from 30 August to 31 October (20). Issue responsiveness was not read because the GitHub API refused us for its rate limit (10 of 25, unchecked). No official SDK, and no MCP server from the project (0). CI with tests on MySQL and PostgreSQL, and a Laravel dependency advisory taken on 31 October (10). 30 + 20 + 10 + 0 + 10 = 70.

Plain API + MCP 84

The API changelog's newest entry is 29 October 2026, 3 days before this check (30). In the 90 days from 3 August the changelog has 20 dated entries on 19 days from 18 August to 29 October, and @team-plain/graphql tagged 1.5.0 (4 September) to 3.2.0 (24 September) and 3.3.0 and 3.3.1 late on 1 November (20). A dated API changelog and support, no public issue tracker (12). Official TypeScript SDK kept current with majors for most breaks. The older @team-plain/typescript-sdk last released on 30 March 2026 (12). CI and release workflows in the SDK monorepo (10).