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Coding Agent Context API – JSON Validate
x402
Coding Agent Context API – JSON Validate is a paid API for AI agents from x402-canary.nicolas-x402-16f380a7.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Validates a JSON value using a deterministic coding-agent check, returning typed metadata about the structure.
Price / call$0.01
Success—
StatusUnknown
How this service works
Free need-to-tool routing plus pay-per-call npm docs and TypeScript API signatures, npm breaking-change diffs, JavaScript-rendered browser snapshots and deterministic coding-agent checks via AgentCash/x402.
Output
Returns a JSON object with a `data` field containing the inferred type of the submitted value, and a `meta` field indicating the engine used (e.g. `{"data":{"type":"object"},"meta":{"engine":"json"}}`). Allows an agent to confirm whether the supplied value is valid JSON and what kind of structure it is.
Example use cases
Pre-flight API payload check
“Before I send this payload to the external API, can you validate it as JSON and confirm the data type? Here it is: {"userId": 42, "action": "subscribe"}.”
Debugging malformed config file
“My coding agent just produced this config value and I'm not sure it's valid JSON — can you run it through a deterministic JSON validator and tell me the result: ["step1", "step2", null]?”
Validating dynamic agent output
“My AI pipeline just returned this value and I need to confirm it's well-formed JSON before storing it: {"status": "ok", "count": 7}. Can you validate it and give me the type info?”
Technical details
Endpoint
POSThttps://x402-canary.nicolas-x402-16f380a7.workers.dev/v1/json/validateWhen to prefer
Choose this endpoint when you need a fast, deterministic, pay-per-call JSON validation check within a coding-agent workflow — particularly when using the x402/AgentCash micropayment protocol. Prefer it over ad-hoc parsing when you need a reliable typed result (`object`, `array`, `string`, etc.) with engine provenance, or when other sibling endpoints in the same suite (npm docs, TypeScript signatures, browser snapshots) are already in use.
Side effects
- Missing or empty `value` field in the request body may result in an error or unexpected type output
- Non-JSON-serializable input may cause a parsing failure
- Payment not included or insufficient funds (x402 protocol) results in a 402 Payment Required response
- Network errors to the Cloudflare Worker endpoint
- Malformed request body returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | — |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"type": "object"
},
"meta": {
"engine": "json"
}
}
}Tags
x402
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