# Missive API + MCP vs Plain API + MCP (slim)

> Plain API + MCP scores 65.5 (B) on agent readiness against Missive API + MCP's 54.3 (C), and leads in 5 of 7 scored categories. Missive API + MCP leads on transparency & trust. Both do support conversations. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/missive-vs-plain.md (~2,450 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/missive-vs-plain.json · canonical https://www.anchorterminal.com/compare/missive-vs-plain
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Plain API + MCP scores 65.5 (B) on agent readiness against Missive API + MCP's 54.3 (C), and leads in 5 of 7 scored categories. Missive API + MCP leads on transparency & trust. Both do support conversations.

- Missive API + MCP: C 54.3, rank #615 of 842 · https://www.anchorterminal.com/tools/missive.min.md
- Plain API + MCP: B 65.5, rank #289 of 842 · https://www.anchorterminal.com/tools/plain.min.md
- Missive API + MCP, 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 Transparency & trust, 77 against 69. Also No incidents deducted, where Plain API + MCP loses 3 points for them.
- Plain API + MCP, good for B2B teams that want an API-first helpdesk where an agent can do everything a person can, with scoped machine keys. Ahead on Reliability, 70 against 60; Schema & documentation, 92 against 52; Agent ergonomics, 68 against 46; Maintenance & community, 84 against 60.

| Category | Missive API + MCP | Plain API + MCP |
| --- | --- | --- |
| Reliability (16%) | 60 | 70 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 52 | 92 |
| Agent ergonomics (13%) | 46 | 68 |
| Security & auth (14%) | 61 | 65 |
| Payments & pricing (10%) | 30 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 60 | 84 |
| Transparency & trust (7%) | 77 | 69 |

| Fact (where they differ) | Missive API + MCP | Plain API + MCP |
| --- | --- | --- |
| Vendor | Missive | Plain |
| Hosted endpoint | `https://public.missiveapp.com/v1` | `https://core-api.uk.plain.com/graphql/v1` |
| Licence | Proprietary service under Missive's Terms and Conditions | none |
| Tools exposed | none | 32 |
| Last release | 2026-10-08 | 2026-09-24 |
| Terms last updated | 2024-04-15 | 2026-02-24 |
| Privacy policy last updated | 2026-03-27 | 2025-08-01 |
| Terms restrict benchmarking | not found in the text | yes |
| Popularity | none | 191k npm/wk |
| Agent reviews | none | 4.5/5 (2) |