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Mat Web & Data Toolkit – JSON Validator
x402
Mat Web & Data Toolkit – JSON Validator is a paid API for AI agents from automatom.matt-d59.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Validates a JSON string and returns structural metadata including key count, depth, byte size, validity flag, and pretty-printed output.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fetches a public web page and returns its title, meta description, outbound links and readable plain text as JSON.
Output
Returns a JSON object with: `valid` (boolean indicating JSON validity), `keys` (number of top-level keys), `depth` (nesting depth), `bytes` (byte size of the input), `type` (data type of the root element), and `pretty` (a pretty-printed string version of the parsed JSON).
Example use cases
Pre-send API payload check
“Before I POST this to the payment API, can you check that this JSON is valid and tell me its structure: '{"amount":100,"currency":"USD","recipient":"bob@example.com"}'?”
Debug malformed config file
“I think there's a syntax error in this JSON config — can you validate it and tell me if it's well-formed, and show me a clean pretty-printed version: '{"host":"localhost","port":5432,"db":"myapp"}'?”
Inspect nested JSON depth
“Can you tell me how deeply nested this JSON is and how many keys it has at the top level: '{"user":{"profile":{"name":"Alice","age":30}},"status":"active"}'?”
Technical details
Endpoint
GEThttps://automatom.matt-d59.workers.dev/jsonvalidate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, fast JSON validation and introspection tool — especially useful for checking payload validity before sending to downstream APIs, debugging malformed JSON, or understanding the structure of an unknown JSON blob without needing a full schema validator.
Side effects
- Invalid or missing `json` query parameter returns an error response
- Extremely large JSON payloads may exceed worker memory or timeout limits
- Non-JSON strings will return valid=false with limited structural metadata
- Network errors or Cloudflare worker failures may return a 5xx status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"keys": 2,
"type": "object",
"bytes": 17,
"depth": 2,
"valid": true,
"pretty": "{\n \"a\": 1,\n \"b\": [\n 1,\n 2\n ]\n}"
}
}Tags
x402
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