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PennyRail JSON Flatten
x402
PennyRail JSON Flatten is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Flattens a nested JSON object into a single-level key-value representation
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns an object containing the operation name (e.g. 'flatten') and the result, which is the input JSON object flattened to a single level with nested keys joined by a delimiter (e.g. dot notation). Additional metadata may be present as extra properties.
Example use cases
Normalize API response for spreadsheet
“Take this deeply nested API response JSON and flatten it into a single level so I can load it into a spreadsheet: {"order":{"id":123,"customer":{"name":"Bob","email":"bob@example.com"},"total":49.99}}”
Prepare config object for environment variables
“Flatten this JSON config object so all nested keys are collapsed to the top level — I need to map them to environment variables: {"db":{"host":"localhost","port":5432},"app":{"debug":true,"name":"myapp"}}”
Simplify webhook payload before storing
“I'm getting webhook payloads with deeply nested structures and want to flatten them before storing. Can you flatten this one for me: {"event":"payment","data":{"amount":100,"currency":"USD","payer":{"id":"u_42","country":"US"}}}”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/f/json.flattenWhen to prefer
Choose this endpoint when you need a quick, pay-per-call microservice to flatten a nested JSON object without setting up local transformation logic. It is ideal for lightweight agent pipelines that occasionally encounter deeply nested JSON and need a normalized flat structure. Prefer alternatives (local libraries, free utilities) for high-volume batch flattening where per-call cost would add up.
Side effects
- Missing required 'input' field returns an error response
- Input value is not a valid JSON object (e.g. array or primitive) may cause unexpected behavior or error
- Extremely large or deeply nested objects may time out or exceed payload limits
- Service unavailability on the Vercel deployment returns 5xx errors
- Payment failure via x402 protocol prevents the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | JSON object |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | — | |
| operationrequired | string |
Tags
x402
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