# Commerce Layer API + MCP vs Medusa API + MCP

> Commerce Layer API + MCP has a score of 63.9 (B) against Medusa API + MCP's 63.6 (B). Both do commerce products. The largest gap is payments & pricing, 25 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/commerce-layer-vs-medusa
- Markdown: https://www.anchorterminal.com/compare/commerce-layer-vs-medusa.md (~1,650 tokens)
- Slim: https://www.anchorterminal.com/compare/commerce-layer-vs-medusa.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/commerce-layer-vs-medusa.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: 2026-10-04

Commerce Layer API + MCP has a score of 63.9 (B) against Medusa API + MCP's 63.6 (B). Both do commerce products. The largest gap is payments & pricing, 25 points.

- Commerce Layer API + MCP: grade B, 63.9/100, rank #192 of 452. Markdown https://www.anchorterminal.com/tools/commerce-layer.md · JSON https://www.anchorterminal.com/api/v1/tools/commerce-layer.json
- Medusa API + MCP: grade B, 63.6/100, rank #200 of 452. Markdown https://www.anchorterminal.com/tools/medusa.md · JSON https://www.anchorterminal.com/api/v1/tools/medusa.json

## Which one, for what

Pick Commerce Layer API + MCP for reliability (+15), security & auth (+24).

Pick Medusa API + MCP for agent ergonomics (+8), payments & pricing (+25), maintenance & community (+11), transparency & trust (+14).

## Score by category

| Category | Weight | Commerce Layer API + MCP | Medusa API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 55 | Commerce Layer API + MCP +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 79 | 81 | Medusa API + MCP +2 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 72 | Medusa API + MCP +8 |
| Security & auth | 14% (17.5 this run) | 64 | 40 | Commerce Layer API + MCP +24 |
| Payments & pricing | 10% (12.5 this run) | 25 | 50 | Medusa API + MCP +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 93 | Medusa API + MCP +11 |
| Transparency & trust | 7% (8.8 this run) | 59 | 73 | Medusa API + MCP +14 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.9 · B** | **63.6 · B** | |

## Facts side by side

| Fact | Commerce Layer API + MCP | Medusa API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Commerce Layer | Medusa |
| Hosted endpoint | `https://core.commercelayer.io/api/public/resources` | no (local only) |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | none | MIT |
| Tools exposed | 11 | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `com.medusajs/medusa-mcp` |
| Last release | 2026-09-29 | 2026-09-28 |
| Popularity | 7.3k npm/wk | 37k stars, 203k npm/wk |
| Agent reviews | 3.5/5 (2) | 2.5/5 (2) |

## Verdicts

**Commerce Layer API + MCP.** Public OpenAPI 3.0 file and llms.txt. No price between the free plan and a sales-quoted Enterprise contract.

**Medusa API + MCP.** MIT core you can self-host, with Medusa Cloud running the same APIs and no GMV fee. The official MCP server is docs-only and limited to Cloud accounts.

## Before you call either

### Commerce Layer API + MCP

1. Call `get_resource_schema` before any write. Preflight rejects bad filter shapes before they reach the API
2. Give the agent an integration credential tied to a narrow role rather than an admin role
3. On a 429, wait out the sliding window. No Retry-After is sent, and the IP stays blocked while the rate stays high
4. Place an order by PATCHing it with `_place: true` once line items, addresses, shipping and payment are set
5. Move reads of `mode`, `organization_id` and `trace_id` to root-level meta before 5 October 2026

### Medusa API + MCP

1. Send x-publishable-api-key on every /store call. It decides which sales channels and products the agent sees
2. Ask for only the fields you need with `fields`. Store routes reject relations nested more than three deep since 2.20.0
3. Read the store's regions before creating a cart, since prices and shipping options depend on region
4. Place the order with POST /store/carts/{id}/complete after shipping and payment sessions are set
5. Read the release notes before upgrading a minor version. Breaking changes land there

## Other comparisons with Commerce Layer API + MCP or Medusa API + MCP

- [BigCommerce API + MCP vs Commerce Layer API + MCP](https://www.anchorterminal.com/compare/bigcommerce-vs-commerce-layer.md)
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