# Aurinko Email API vs Fastmail API (JMAP) (slim)

> Fastmail scores 54.1 (C) to Aurinko Email's 44.2 (E) for mailbox access. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.md (~2,450 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.json · canonical https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Fastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema & documentation and payments & pricing. Both do mailbox access.

- Aurinko Email API: E 44.2, rank #878 of 950 · https://www.anchorterminal.com/tools/aurinko-email.min.md
- Fastmail API (JMAP): C 54.1, rank #694 of 950 · https://www.anchorterminal.com/tools/fastmail.min.md
- Aurinko Email API, good for A product that connects many users' Gmail and Microsoft mailboxes and wants one schema, delta sync, tracking and webhooks at a low price per account. Ahead on Schema & documentation, 67 against 52; Payments & pricing, 40 against 30. Also A hosted endpoint, with nothing to install.
- Fastmail API (JMAP), good for An agent working in its owner's own Fastmail mailbox, where JMAP gives batched reads, structured search and state-based sync on an open standard, and MCP gives a ready connection with read, write and send levels. Ahead on Reliability, 54 against 40; Agent ergonomics, 73 against 49; Security & auth, 60 against 42; Maintenance & community, 26 against 13; Transparency & trust, 74 against 44.

| Category | Aurinko Email API | Fastmail API (JMAP) |
| --- | --- | --- |
| Reliability (16%) | 40 | 54 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 67 | 52 |
| Agent ergonomics (13%) | 49 | 73 |
| Security & auth (14%) | 42 | 60 |
| Payments & pricing (10%) | 40 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 13 | 26 |
| Transparency & trust (7%) | 44 | 74 |

| Fact (where they differ) | Aurinko Email API | Fastmail API (JMAP) |
| --- | --- | --- |
| Vendor | Yoxel, Inc. | Fastmail Pty Ltd |
| Hosted endpoint | `https://api.aurinko.io` | no (local only) |
| Auth | OAuth | OAuth or key |
| Licence | Proprietary service under Yoxel's Terms of Services Agreement | Proprietary service under Fastmail's API Terms of Service and API Developer Policy. JMAP is an open IETF standard, and the sample code on GitHub is MIT |
| Read-only variant documented | no | yes |
| llms.txt | yes | no |
| Last release | none | 2026-04-22 |
| Terms last updated | 2022-08-11 | no date given |
| Privacy policy last updated | 2022-08-11 | no date given |
| Terms restrict automated access | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 123 stars |