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Agent API Listings Package Readiness Check
x402
Agent API Listings Package Readiness Check is a paid API for AI agents from agent-api-listings.krimskrams.xyz, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-13).
Analyzes an API's OpenAPI spec and origin to determine readiness, blockers, or unsupported status for mpp.dev and x402-list package directories, with detailed reasons — without requiring submission or directory fees.
Price / call$0.2
Success—
StatusUnknown
How this service works
Provide an API origin, inline OpenAPI document, and optional target list. Receive JSON with ready, blocked, or unsupported mpp.dev and x402-list packages, including exact reasons, without submission or directory fees.
Output
A JSON object containing per-target results for each requested directory (mpp.dev and/or x402-list), where each result is labeled as 'ready', 'blocked', or 'unsupported', accompanied by exact human-readable reasons explaining the status — enabling developers to understand and address specific issues before submission.
Example use cases
Pre-submission readiness check for x402 API
“Before I try to list my payments API on x402-list, can you run a readiness check using my OpenAPI spec and the origin https://payments.myservice.io — I want to know if it'll be accepted or what's blocking it?”
Diagnose blocked mpp.dev listing
“My API at https://tools.mycompany.com was rejected from mpp.dev — can you analyze my OpenAPI document and tell me exactly what's blocking it so I know what to fix?”
Dual-directory eligibility assessment
“Check my API at https://api.agentapp.dev against both mpp.dev and x402-list requirements using this OpenAPI doc — my contact email is dev@agentapp.dev and the category is 'productivity'. Tell me the status and reasons for each target.”
Technical details
Endpoint
POSThttps://agent-api-listings.krimskrams.xyz/v1/packagesWhen to prefer
Use this endpoint when you need a programmatic, fee-free pre-check of your API's eligibility for mpp.dev or x402-list directories before investing time in a formal submission. It is especially valuable when you want detailed, machine-readable reasons for any blockers so you can iterate on your OpenAPI spec or configuration without trial-and-error submissions. Prefer this over manual directory review processes or submitting blindly and waiting for rejection feedback.
Side effects
- Missing or invalid 'origin' field returns a 422 validation error
- Malformed or incomplete OpenAPI document may result in unsupported status with generic reasons
- Missing contact email when targeting x402-list (and none in openapi.info.contact.email) causes a blocked result
- Invalid target values (not 'mpp.dev' or 'x402-list') return validation errors
- Payment not fulfilled causes 402 response blocking the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| name | — | |
| tags | array | |
| — | Required for a ready x402-list package unless openapi.info.contact.email contains a valid email | |
| notes | — | |
| origin | string | |
| openapi | object | |
| targets | — | |
| category | — | |
| service_id | — | |
| website_url | — | |
| provider_name | — | |
| endpoint_paths | array |
Tags
x402
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