API Key AuthOpenAPI Spec
Enterprise payment processing platform offering card payments, digital wallets, and fraud management solutions. Designed primarily for merchants and financial institutions rather than direct API integration by autonomous agents.
#66 of 72 in Payments
Checklist Breakdown
10 of 33 checks passed.
14 unscored.
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
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
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)
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
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
Worldpay has an OpenAPI specification and sandbox environment, which helps with discovery and testing. However, account creation requires extensive manual KYC processes, merchant underwriting, and contract negotiation—making programmatic signup impossible. The API tooling is mature for payment transactions but oriented toward backend systems, not autonomous agent orchestration. High-value payment processing means strict reliability and compliance requirements, but no public MCP server or llms.txt file exists for easy agent integration.
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