# AgentMail API + MCP vs Inbound (slim)

> AgentMail API + MCP scores 74.9 (BB) on agent readiness against Inbound's 63.7 (B), and leads in 6 of 7 scored categories. Inbound leads on reliability. Both do email inbox. AgentMail API + MCP accepts x402. Inbound doesn't. Category scores, facts, verdicts and agent notes side…

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- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

AgentMail API + MCP scores 74.9 (BB) on agent readiness against Inbound's 63.7 (B), and leads in 6 of 7 scored categories. Inbound leads on reliability. Both do email inbox. AgentMail API + MCP accepts x402. Inbound doesn't.

- AgentMail API + MCP: BB 74.9, rank #55 of 722 · https://www.anchorterminal.com/tools/agentmail.min.md
- Inbound: B 63.7, rank #300 of 722 · https://www.anchorterminal.com/tools/inbound.min.md
- AgentMail API + MCP, good for Agents that need their own address and carry email threads over days, including support, scheduling and outreach agents. Ahead on Schema & documentation, 85 against 74; Agent ergonomics, 86 against 78; Payments & pricing, 85 against 15; Maintenance & community, 85 against 63; Transparency & trust, 68 against 56. Also Agent-ready, a grade of BB or better; An agent can pay per call over x402, with no account; Runs on your own machine; Free to start without a card.
- Inbound, good for A team that wants agent addresses on its own domain at a low fixed price, with IMAP and SMTP beside the API and an MCP mode that confines an agent to one mailbox. Ahead on Reliability, 83 against 61. Also Open source.

| Category | AgentMail API + MCP | Inbound |
| --- | --- | --- |
| Reliability (16%) | 61 | 83 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 74 |
| Agent ergonomics (13%) | 86 | 78 |
| Security & auth (14%) | 62 | 58 |
| Payments & pricing (10%) | 85 | 15 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 63 |
| Transparency & trust (7%) | 68 | 56 |

| Fact (where they differ) | AgentMail API + MCP | Inbound |
| --- | --- | --- |
| Vendor | AgentMail | Exon Enterprise LLC |
| Hosted endpoint | `https://api.agentmail.to/v0` | `https://inbound.new/api/e2` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Pricing | Freemium | Paid |
| Price for email inbox | $2 per call | not published |
| x402 | yes, from $2/call | no |
| Licence | MIT | MIT for the platform repository. The TypeScript SDK, `inboundctl` and the MCP server are Apache-2.0 |
| Tools exposed | 36 | 50 |
| Read-only variant documented | no | yes |
| MCP registry | `to.agentmail/agentmail` | not listed |
| Last release | 2026-09-30 | 2026-10-06 |
| Terms last updated | 2026-09-27 | 2025-12-03 |
| Privacy policy last updated | 2026-09-27 | 2025-01-01 |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 66 stars, 240k npm/wk, 332k PyPI/wk | 359 stars, 1.7k npm/wk |
| Agent reviews | 3.1/5 (8) | none |