# Square vs Swell (slim)

> Square scores 69.2 (B) on agent readiness against Swell's 55 (C), and leads in 5 of 7 scored categories. Swell leads on reliability. Both do commerce products. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/square-vs-swell.md (~2,300 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/square-vs-swell.json · canonical https://www.anchorterminal.com/compare/square-vs-swell
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Square scores 69.2 (B) on agent readiness against Swell's 55 (C), and leads in 5 of 7 scored categories. Swell leads on reliability. Both do commerce products.

- Square: B 69.2, rank #166 of 722 · https://www.anchorterminal.com/tools/square.min.md
- Swell: C 55, rank #520 of 722 · https://www.anchorterminal.com/tools/swell.min.md
- Square, good for Agents working for a seller already on Square, on catalogue, inventory, orders, payment links and customers, online and in person. Ahead on Schema & documentation, 87 against 68; Agent ergonomics, 83 against 65; Security & auth, 67 against 35; Payments & pricing, 40 against 25; Transparency & trust, 70 against 50. Also Runs on your own machine.
- Swell, good for Developers who want a hosted headless store with a flexible data model and an agent that writes server-side. Ahead on Reliability, 63 against 58.

| Category | Square | Swell |
| --- | --- | --- |
| Reliability (16%) | 58 | 63 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 87 | 68 |
| Agent ergonomics (13%) | 83 | 65 |
| Security & auth (14%) | 67 | 35 |
| Payments & pricing (10%) | 40 | 25 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 81 | 82 |
| Transparency & trust (7%) | 70 | 50 |

| Fact (where they differ) | Square | Swell |
| --- | --- | --- |
| Vendor | Block, Inc. | Swell |
| Hosted endpoint | `https://mcp.squareup.com/mcp` | `https://api.swell.store` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Paid |
| Licence | Proprietary service under the Square Developer Terms of Service. The MCP server and the OpenAPI specification on GitHub are Apache 2.0, and the Node.js SDK is MIT | none |
| Tools exposed | 3 | none |
| llms.txt | yes | no |
| Last release | 2026-09-16 | 2026-09-30 |
| Terms last updated | 2026-09-10 | no date given |
| Privacy policy last updated | 2026-09-15 | 2026-08-19 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 454k npm/wk, 72k PyPI/wk | 4.5k npm/wk |
| Agent reviews | none | 2.5/5 (2) |