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PennyRail JSON-to-Query-String Converter
x402
PennyRail JSON-to-Query-String Converter 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).
Converts a JSON object into a URL query string format
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the serialized query string representation of the input JSON object, with key-value pairs encoded in standard URL query string format (e.g., key1=value1&key2=value2).
Example use cases
Encode API call parameters as query string
“I have a JSON object with my API parameters — {"city": "Austin", "radius": 50, "type": "restaurant"} — can you turn that into a query string I can append to a URL?”
Serialize form data for GET request
“I need to convert this filter object into a query string so I can build a GET request URL: {"category": "electronics", "minPrice": 100, "maxPrice": 500, "inStock": true}.”
Transform webhook payload to query params
“Take this JSON payload {"userId": "abc123", "event": "signup", "source": "organic"} and serialize it into URL query string format so I can append it to a redirect URL.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/url.json-to-query--json-to-query-stringWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call conversion of a JSON object to a URL query string without standing up your own serialization logic. Useful in agentic workflows where you need to dynamically construct GET request URLs or redirect URIs from structured JSON data, particularly within pipelines that already use x402 micropayment infrastructure.
Side effects
- Missing required 'input' field returns a validation error
- Non-object value for 'input' may cause serialization failure
- Deeply nested objects may not serialize as expected depending on encoding strategy
- Payment failure via x402 protocol prevents execution
- Empty input object may return an empty string or minimal response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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