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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 2026-09-14).
Flattens a nested JSON object into a single-level key-value structure using dot or bracket notation
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
A flattened JSON object where all nested keys are collapsed into a single level, typically using dot notation (e.g. 'address.city': 'New York') — returned as a JSON object with no nested structures.
Example use cases
Flatten API response for CSV export
“I got this deeply nested JSON back from a third-party API and I need to flatten it into a single-level structure so I can drop it into a spreadsheet — can you run it through the flattener?”
Normalize config before database insert
“I have a nested config object with several levels of nesting that I need to flatten into dot-notation key-value pairs before inserting it into my database table.”
Simplify webhook payload for logging
“This webhook payload has a bunch of nested objects inside it — can you flatten the whole thing so my logging system can index every field at the top level?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/json.flatten--flatten-jsonWhen to prefer
Choose this endpoint when you need a quick, pay-per-call JSON flattening operation without standing up your own transformation pipeline. Useful in agent workflows where you receive nested API responses and need to normalize them for downstream processing like CSV export, database insertion, or flat-field logging. Prefer this over general-purpose code execution when you want a lightweight, dedicated utility with no setup.
Side effects
- Missing or malformed 'input' field returns a validation error
- Input containing circular references may cause processing failure
- Non-object input types (arrays, primitives at root) may be rejected or produce unexpected output
- Very large deeply nested objects may hit size or depth limits
- Network timeout on the Vercel serverless function under cold-start conditions
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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