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PennyRail JSON Path Reader
x402
PennyRail JSON Path Reader is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status down (last checked 2026-10-31).
Reads a value at a specified dot-notation path from a JSON object via a paid settlement API
Price / call$0.001
Success—
StatusDown
How this service works
Machine-readable settlement service
Output
Returns the value found at the specified dot-notation path within the provided JSON input object, as a JSON object with the extracted result. If the path does not exist, the response may return null or an error indicator.
Example use cases
Extract nested config value
“I have a large JSON config blob and I need you to pull out just the value at 'database.primary.host' — can you read that path for me?”
Parse API response field
“I got a JSON response from a third-party API and I need the value sitting at 'data.items.0.id' — can you extract that for me?”
Retrieve user profile attribute
“From this user profile JSON, grab the value at 'profile.preferences.theme' so I can check what display mode they have set.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/json.get--read-dot-path?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call JSON path extraction service without setting up a full data-processing pipeline. Ideal for agents that occasionally need to pull a specific nested field from JSON payloads and want a simple, stateless micro-service with per-call micro-pricing via USDC.
Side effects
- Invalid or malformed JSON input causes a parsing error
- Requested dot-notation path does not exist in the provided object, returning null or empty
- Missing required 'input' field results in a 400-level error
- Network or payment settlement failure from the x402 micro-payment layer
- Deeply nested or large JSON objects may time out or exceed size limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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