# Saleor API + MCP vs Square

> Square and Saleor API + MCP score within a point of each other on agent readiness, 69.2 (B) and 68.6 (B). Saleor API + MCP leads on payments & pricing and transparency & trust. Both do commerce products. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/saleor-vs-square
- Markdown: https://www.anchorterminal.com/compare/saleor-vs-square.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/saleor-vs-square.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/saleor-vs-square.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Square and Saleor API + MCP score within a point of each other on agent readiness, 69.2 (B) and 68.6 (B). Saleor API + MCP leads on payments & pricing and transparency & trust. Both do commerce products.

- Saleor API + MCP: grade B, 68.6/100, rank #175 of 722. Markdown https://www.anchorterminal.com/tools/saleor.md · JSON https://www.anchorterminal.com/api/v1/tools/saleor.json
- Square: grade B, 69.2/100, rank #166 of 722. Markdown https://www.anchorterminal.com/tools/square.md · JSON https://www.anchorterminal.com/api/v1/tools/square.json

## Which one, for what

### Saleor API + MCP (B)

Good for: Teams that want an open-source GraphQL backend with multi-channel pricing and an agent that reads store data safely.

Ahead on:
- Payments & pricing, 45 against 40
- Transparency & trust, 76 against 70

Also in its favour:
- Open source

Watch for: The MCP server can't create checkouts or orders

### Square (B)

Good for: Agents working for a seller already on Square, on catalogue, inventory, orders, payment links and customers, online and in person.

Ahead on:
- Reliability, 58 against 50

Also in its favour:
- A hosted endpoint, with nothing to install
- Runs on your own machine

Watch for: The MCP server is marked beta, and the remote server reaches production data only


## Score by category

| Category | Weight | Saleor API + MCP | Square | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 58 | Square +8 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 89 | 87 | Saleor API + MCP +2 |
| Agent ergonomics | 13% (16.2 this run) | 86 | 83 | Saleor API + MCP +3 |
| Security & auth | 14% (17.5 this run) | 71 | 67 | Saleor API + MCP +4 |
| Payments & pricing | 10% (12.5 this run) | 45 | 40 | Saleor API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 81 | Saleor API + MCP +4 |
| Transparency & trust | 7% (8.8 this run) | 76 | 70 | Saleor API + MCP +6 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **68.6 · B** | **69.2 · B** | |

## Facts side by side

| Fact | Saleor API + MCP | Square |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Saleor | Block, Inc. |
| Hosted endpoint | no (local only) | `https://mcp.squareup.com/mcp` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | BSD-3-Clause | 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 |
| Tools exposed | 8 | 3 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-09-16 |
| Terms last updated | no date given | 2026-09-10 |
| Privacy policy last updated | no date given | 2026-09-15 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 23k stars, 7.3k npm/wk | 454k npm/wk, 72k PyPI/wk |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Saleor API + MCP.** One GraphQL schema with 78 typed error-code enums and 464 marked deprecations. The MCP server can't create checkouts or orders.

**Square.** The REST API has a public OpenAPI 3.0 spec, OAuth scopes split by read and write for each resource, idempotency keys on writes and a free sandbox. The MCP server is in beta and its remote instance reaches production only. No numeric REST rate limits or SLA were found, and the status page recorded widespread errors on 27 September 2026.

## Before you call either

### Saleor API + MCP

1. Pass the channel slug on product and checkout queries. Prices and availability are per channel
2. Send X-Saleor-API-URL and X-Saleor-Auth-Token on every MCP request, with a token holding MANAGE_PRODUCTS and MANAGE_ORDERS
3. Read the `errors` array in every mutation payload. A 200 response can still carry a CheckoutErrorCode
4. Keep queries under the 50,000 complexity cap and 100 items a page, and send at most 4 mutations per request
5. The 3.24 changelog removes the old dummy payment plugins, so test checkouts should use a payment app

### Square

1. Test against the sandbox first with the local MCP server and `SANDBOX=true`. The remote server at mcp.squareup.com reaches production only
2. Set `DISALLOW_WRITES=true` on the local MCP server when the task only reads
3. Call `get_service_info`, then `get_type_info`, before each `make_api_request`. The request body is otherwise untyped
4. Send a fresh `idempotency_key` on every write, and reuse it when retrying the same write
5. Pin `Square-Version` in each request. Use a page cursor within 5 minutes of receiving it

## Questions

### Which is better for AI agents, Saleor API + MCP or Square?

Square and Saleor API + MCP score within a point of each other on agent readiness, 69.2 (B) and 68.6 (B). Saleor API + MCP leads on payments & pricing and transparency & trust.

### Do Saleor API + MCP and Square need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Saleor API + MCP and Square without installing anything?

No hosted endpoint is listed for Saleor API + MCP. Square has a hosted endpoint at https://mcp.squareup.com/mcp.

### Are Saleor API + MCP and Square open source?

Saleor API + MCP is open source (BSD-3-Clause). No open-source release is listed for Square.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/saleor-vs-square.json, and with the fewest tokens: https://www.anchorterminal.com/compare/saleor-vs-square.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "saleor", "b": "square"}`. From a terminal: `anchor compare saleor square`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/saleor.json and https://www.anchorterminal.com/api/v1/tools/square.json

## Other comparisons with Saleor API + MCP or Square

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- [Adobe Commerce (Magento) vs Square](https://www.anchorterminal.com/compare/adobe-commerce-vs-square.md)
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