Swell

https://swell.is
39
Fair
Agent Native Score
Free TierAPI Key AuthOpenAPI Spec

Swell is a headless commerce platform that provides APIs for building custom e-commerce experiences. It offers product management, shopping cart, checkout, and order processing capabilities.

Categories: Ecommerce · Commerce Api
#16 of 28 in Ecommerce · #2 of 3 in Commerce Api
Checklist Breakdown

13 of 33 checks passed. 14 unscored.

Discovery 63%

Can an agent find and understand this tool without a web search?

✓ Published OpenAPI/Swagger spec
✗ Has llms.txt or llms-full.txt
✗ Has an MCP server (official or well-maintained)
✗ MCP server listed in a public registry
✓ API reference docs are publicly accessible
✓ Docs include runnable code examples
✓ Has a public changelog or release notes
✓ Has a public status page
Auth & Onboarding 50%

Can an agent create an account and get credentials without human intervention?

✗ Signup does not require CAPTCHA
✗ Signup does not require phone verification
✓ Supports API key auth (not only OAuth)
✗ API key obtainable without manual approval
✓ No mandatory billing info to start
✓ Can sign up without creating an organization
Pricing 100%

Can an agent operate autonomously without upfront payment or contracts?

✓ Has a free tier
✓ Usage-based pricing available
✓ No minimum contract or commitment
✓ Pricing page is public (no 'contact sales')
✓ Free tier sufficient for testing (not just a trial)
Agent Tooling Not yet scored

How well does the API work for non-human consumers?

— SDK available in 2+ languages
— Structured error responses (JSON with error codes)
— Idempotency support on write endpoints
— Pagination on list endpoints
— Webhook/event support
— Sandbox or test mode available
— Rate limit headers in responses
— Consistent REST resource naming
Reliability Not yet scored

Does the tool fail gracefully when an agent makes a mistake?

— Meaningful error messages (not just 500)
— 429 responses include Retry-After header
— Documented uptime SLA (99.9%+)
— Graceful degradation under rate limits
— Request IDs in responses for debugging
— API versioning supported
Reviewer Notes

Swell has solid API documentation and an OpenAPI spec, making discovery moderately accessible, though no MCP server or llms.txt file exists. Account creation requires manual signup—no programmatic registration path for agents. The REST API is well-structured with reasonable error responses, but lacks real-time SDKs and webhook reliability details. Free tier and sandbox environment are available, enabling cost-free agent experimentation. Main weakness: human-dependent onboarding prevents true agent autonomy; main strength: comprehensive REST API and sandbox testing.

Let your agents find tools like Swell

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claude mcp add --transport http agent-native-registry https://agentnativeregistry.com/api/mcp