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ONE Engine JSON Validator
x402
ONE Engine JSON Validator is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0011/call, status unknown (last checked 2026-10-02).
Validates a JSON text string and returns its parsed type plus normalized JSON output when valid
Price / call$0.0011
Success—
StatusUnknown
How this service works
Validate JSON text and return parsed type plus normalized JSON when valid
Output
Returns whether the input text is valid JSON, the parsed data type (e.g. object, array, string, number, boolean, null), and a normalized (canonically formatted) JSON representation when the input is valid. On invalid input, returns an error or failure indicator.
Example use cases
Pre-flight JSON check in agent pipeline
“Before I store this API response, validate it as JSON and tell me what type it parses to: '[{"id":1,"value":"foo"},{"id":2,"value":"bar"}]'”
Debugging malformed config file
“I got this config text from a user and I'm not sure if it's valid JSON — can you validate it and return the normalized version if it is: '{name: "test", enabled: true}'”
Sanitizing agent-generated output
“The language model returned this string and I need to confirm it's well-formed JSON before passing it downstream — validate it please: '{"status":"ok","count":5}'”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/json/validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs a lightweight, cheap ($0.0011 USDC), deterministic JSON validation step — especially inside automated pipelines where confirming JSON well-formedness and obtaining a normalized canonical form is required before downstream processing, storage, or forwarding. Prefer over general-purpose LLM JSON parsing when you want a reliable, structured pass/fail signal and normalized output without ambiguity.
Side effects
- Empty or missing 'text' field returns an error
- Non-JSON text (plain English, XML, CSV) returns invalid result
- Malformed JSON (unquoted keys, trailing commas) returns invalid with no normalized output
- Very large JSON payloads may hit size limits
- Network timeout on the workers.dev edge runtime
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | JSON text to validate |
Tags
x402
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