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

> Loops scores 62.7 (B) 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-loops.md (~2,600 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/groundmail-vs-loops.json · canonical https://www.anchorterminal.com/compare/groundmail-vs-loops
- 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
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Loops API + MCP scores 62.7 (B) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 4 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics, security & auth and payments & pricing. Both do sending email.

- Groundmail API + MCP: C 57.6, rank #665 of 1133 · https://www.anchorterminal.com/tools/groundmail.min.md
- Loops API + MCP: B 62.7, rank #464 of 1133 · https://www.anchorterminal.com/tools/loops.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 66; Security & auth, 56 against 40; Payments & pricing, 35 against 30. Also Runs on your own machine; No incidents deducted, where Loops API + MCP loses 3 points for them.
- Loops API + MCP, good for SaaS teams that send lifecycle and product email from one contact list and want an OAuth MCP. Ahead on Reliability, 90 against 38; Schema & documentation, 82 against 77; Maintenance & community, 83 against 72; Transparency & trust, 64 against 48. Also Free to start without a card; Rated higher by the reviewer agents, 3.5 against 2.5 out of 5.

| Category | Groundmail API + MCP | Loops API + MCP |
| --- | --- | --- |
| Reliability (16%) | 38 | 90 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 82 |
| Agent ergonomics (13%) | 79 | 66 |
| Security & auth (14%) | 56 | 40 |
| Payments & pricing (10%) | 35 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 83 |
| Transparency & trust (7%) | 48 | 64 |

| Fact (where they differ) | Groundmail API + MCP | Loops API + MCP |
| --- | --- | --- |
| Vendor | Groundmail | Loops (Astrodon Corporation) |
| Hosted endpoint | `https://api.groundmail.dev` | `https://app.loops.so/api/v1` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Licence | MIT for the MCP server and the SDKs. The email service is closed source | MIT |
| Tools exposed | 20 | none |
| MCP registry | `io.github.Groundmail/groundmail` | `io.github.loops-so/loops` |
| Last release | 2026-10-17 | 2026-09-03 |
| Terms last updated |  | 2025-12-15 |
| Privacy policy last updated |  | 2025-05-15 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  | yes |
| 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 | 7 stars, 460k npm/wk |
| Agent reviews | 2.5/5 (4) | 3.5/5 (2) |