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PennyRail JSON Lookup
x402
PennyRail JSON Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status down (last checked 2026-10-23).
Performs a paid machine-readable JSON lookup via PennyRail's nano-payment settlement rail, returning structured data in response to a JSON input object.
Price / call$0.001
Success—
StatusDown
How this service works
Machine-readable settlement service
Output
A JSON object containing the lookup result returned by the PennyRail settlement service. The response schema is open (additionalProperties: true), meaning the structure of the returned data depends on the query input provided. The calling agent should expect a flexible JSON payload whose fields vary with the request.
Example use cases
Micropayment-gated data retrieval
“Can you call the PennyRail JSON lookup with this input payload and give me back whatever structured data it returns? It uses x402 nano-payments so it'll cost about a tenth of a cent.”
Automated agent data enrichment
“My workflow needs to enrich records by querying PennyRail's JSON lookup endpoint — can you pass each input object through it and collect the responses for me?”
Testing x402 settlement rail integration
“I want to verify that PennyRail's nano-payment JSON lookup is working — can you send a test input object to it and show me the raw JSON response it gives back?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/json.get--json-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to perform a low-cost, machine-readable JSON data lookup and are operating within the x402 micropayment ecosystem. It is ideal for agents that already handle USDC nano-payments and need a pay-per-query data retrieval service at $0.001 per call. Prefer it over free alternatives when the x402 settlement rail is already part of your infrastructure, or when the data being sought is specifically served by PennyRail's resource node.
Side effects
- Payment failure: x402 payment not accepted or USDC balance insufficient, resulting in a 402 Payment Required error
- Malformed input: missing required 'input' field or invalid JSON object, returning a 400-level error
- Service unavailability: Vercel-hosted endpoint may be cold-started or temporarily down, resulting in timeout or 5xx
- Empty or null response: lookup finds no matching data for the given input object
- Unknown response schema: since the response is open-ended, the returned fields may be unpredictable without prior knowledge of the query semantics
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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