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Agent API Listings Package Builder
x402
Agent API Listings Package Builder is a paid API for AI agents from agent-api-listings.46-224-157-88.sslip.io, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-13).
Generates validated MPP and x402 directory listing packages from OpenAPI metadata for AI agent API discovery registries.
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 and a static document-readiness report, without submission or directory fees.
Output
Returns a JSON package set with format 'agent-api-listings-package-set-v1', listing each targeted directory (mpp.dev, x402-list) and the build status ('ready' or error details) for each. On success, validated listing packages are ready for submission to the respective directories.
Example use cases
Publish new AI API to agent directories
“I just built an AI translation API at https://translate.myapp.io and want to get it listed on both mpp.dev and x402-list — can you take my OpenAPI spec and generate the validated directory packages for me? My email is founder@myapp.io and the category is 'language'.”
Register x402-enabled service for discovery
“My API at https://summarizer.acme.dev supports x402 payments and I need to create a listing package for x402-list so agents can discover and pay for it automatically — can you build the package from my OpenAPI spec with provider name 'Acme AI' and tag it as 'text' and 'summarization'?”
Batch-register multiple endpoints on mpp.dev
“I have a data enrichment API at https://enrich.databot.ai with five endpoints I want listed on mpp.dev — can you build the directory package from my OpenAPI spec, targeting just mpp.dev, with service ID 'databot-enrich' and notes explaining it's for B2B data pipelines?”
Technical details
Endpoint
POSThttps://agent-api-listings.46-224-157-88.sslip.io/v1/packagesWhen to prefer
Choose this endpoint when you need to generate validated, ready-to-submit listing packages for AI agent API directories (mpp.dev or x402-list) directly from an OpenAPI specification. It is the canonical tool for publishing x402-compatible services to agent marketplaces and automating the listing workflow, especially when you want both MPP and x402-list packages produced in a single call.
Side effects
- Invalid or missing origin URL returns a validation error
- Malformed or incomplete OpenAPI object causes schema validation failure
- Missing required email when targeting x402-list without a contact email in OpenAPI spec returns an error
- Invalid target values outside ['mpp.dev','x402-list'] are rejected
- Exceeding maxItems limits on tags (20) or endpoint_paths (50) returns a validation error
- Payment not sent or insufficient USDC triggers 402 response before processing
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 |
Output
Schema · Response
{
"type": "json",
"example": {
"format": "agent-api-listings-package-set-v1",
"results": {
"mpp.dev": {
"status": "ready"
},
"x402-list": {
"status": "ready"
}
},
"targets": [
"mpp.dev",
"x402-list"
]
}
}Tags
x402
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