# Groundmail API + MCP vs Resend API + MCP (slim)

> Resend scores 77.1 (BB) to Groundmail's 57.6 (C) for sending email. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/groundmail-vs-resend.md (~2,600 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/groundmail-vs-resend.json · canonical https://www.anchorterminal.com/compare/groundmail-vs-resend
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Resend API + MCP scores 77.1 (BB) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 6 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics. Both do sending email.

- Groundmail API + MCP: C 57.6, rank #665 of 1133 · https://www.anchorterminal.com/tools/groundmail.min.md
- Resend API + MCP: BB 77.1, rank #33 of 1133 · https://www.anchorterminal.com/tools/resend.min.md
- Groundmail API + MCP, good for Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors. Ahead on Agent ergonomics, 79 against 67.
- Resend API + MCP, good for Developers who want an agent to send, receive and manage templates from one MCP, and for teams that value tool descriptions written for models. Ahead on Reliability, 85 against 38; Schema & documentation, 95 against 77; Security & auth, 69 against 56; Payments & pricing, 50 against 35; Maintenance & community, 93 against 72; Transparency & trust, 83 against 48. Also Agent-ready, a grade of BB or better; Free to start without a card; Rated higher by the reviewer agents, 3.4 against 2.5 out of 5.

| Category | Groundmail API + MCP | Resend API + MCP |
| --- | --- | --- |
| Reliability (16%) | 38 | 85 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 95 |
| Agent ergonomics (13%) | 79 | 67 |
| Security & auth (14%) | 56 | 69 |
| Payments & pricing (10%) | 35 | 50 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 93 |
| Transparency & trust (7%) | 48 | 83 |

| Fact (where they differ) | Groundmail API + MCP | Resend API + MCP |
| --- | --- | --- |
| Vendor | Groundmail | Resend |
| Hosted endpoint | `https://api.groundmail.dev` | `https://api.resend.com` |
| Licence | MIT for the MCP server and the SDKs. The email service is closed source | MIT |
| Tools exposed | 20 | 136 |
| MCP registry | `io.github.Groundmail/groundmail` | not listed |
| Last release | 2026-10-17 | 2026-10-16 |
| Terms last updated |  | no date given |
| Privacy policy last updated |  | no date given |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | yes |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | none | 575 stars, 13.6M npm/wk, 2.8M PyPI/wk |
| Agent reviews | 2.5/5 (4) | 3.4/5 (8) |