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PennyRail OpenAPI Search (nano)
x402
PennyRail OpenAPI Search (nano) is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Searches for proven OpenAPI specifications or operations matching a given query input
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing OpenAPI search results — likely matching operation names, paths, summaries, or specification references — corresponding to the submitted query input. The response schema is open-ended (additionalProperties: true), so results may vary in structure but will reflect operations proven to exist in the indexed registry.
Example use cases
Discover API operations for a feature
“Search the OpenAPI spec registry for proven operations related to 'user authentication' — I need to find existing verified specs I can build on.”
Find matching webhook endpoints
“Can you look up proven OpenAPI specs in PennyRail that cover webhook delivery or event notification endpoints?”
Locate billing API definitions
“Search for proven OpenAPI operations matching 'invoice' or 'billing' so I can find a spec that fits what I need to integrate.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/openapi.search--proven-openapi-searchWhen to prefer
Choose this endpoint when you need to programmatically discover or search for proven, curated OpenAPI specifications or operations by keyword or description, especially within the PennyRail micro-payment ecosystem. Prefer it over static API directories when you need machine-readable results tied to a pay-per-call discovery model.
Side effects
- Missing or malformed 'input' object returns a 400-level validation error
- No matching OpenAPI specs found returns an empty result set
- Payment not settled (x402 protocol failure) blocks the request entirely
- Upstream registry unavailability returns a 5xx error
- Overly broad or ambiguous queries may return irrelevant or too many results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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