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PennyRail JSON Path GET
x402
PennyRail JSON Path GET is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).
Fetches a JSON value at a specified path from a remote resource, payable per-call via x402 micropayment
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the value found at the requested path within the remote resource. The response schema is open-ended (additionalProperties: true), meaning the returned shape depends on the data stored at that path.
Example use cases
Extract nested config from paid API
“Pull the value at the 'settings.theme.color' path from the PennyRail resource node — I need that specific field from the JSON it serves.”
Retrieve live data field for dashboard
“Fetch the 'metrics.activeUsers' field from the PennyRail JSON resource node and give me the current number so I can update my dashboard.”
Validate a key exists in remote JSON
“Check whether the 'status' key is present and what its value is in the PennyRail JSON resource — query it by path and tell me what comes back.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/json.get--get-json-path?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to extract a specific value from a machine-readable, micropayment-gated JSON resource using path-based access. It is best suited for agents that already know the structure of the target JSON and need a single field or subtree, and are comfortable settling via x402 USDC micropayments at $0.001 per call.
Side effects
- Path not found in the JSON resource — may return empty or null result
- Invalid or malformed input object causes a 400-level error
- Payment failure via x402 protocol results in 402 Payment Required response
- Resource node unavailable or Vercel cold-start timeout
- Overly broad path expression returns unexpectedly large payload
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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