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x402 Utils – JSON Schema Validator
x402
x402 Utils – JSON Schema Validator is a paid API for AI agents from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Validates a JSON value against a JSON Schema (draft-07/2019-09) and returns a detailed list of all validation errors with their paths, using RE2-safe pattern matching.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate a JSON value against a JSON Schema (draft-07 and 2019-09 keywords, formats such as email, uri, date-time) and list every error with its path. Patterns run on RE2, so a schema cannot stall the check.
Output
Returns a structured result indicating whether the JSON value is valid against the provided schema, and if not, a list of all validation errors each with the JSON path to the failing field and a human-readable error message describing the constraint violation.
Example use cases
API request payload pre-flight check
“Before I send this user registration payload to the backend, validate it against my schema — the schema requires 'email' as a valid email format, 'age' as a number between 18 and 120, and 'username' as a string of 3–20 characters. Here's the payload: {"email": "bob@", "age": 15, "username": "x"}.”
Debug failing form submission
“My form submission is getting rejected and I'm not sure why. Can you run this JSON against my draft-07 schema and list every validation error with the exact field path so I know what to fix? The data is {"dob": "not-a-date", "phone": null} and the schema expects 'dob' to be a date-time and 'phone' to be a string.”
CI pipeline data contract check
“I need to validate this config file JSON against our internal JSON Schema to make sure it meets the contract before deployment — the schema uses 2019-09 keywords. Give me every error and the path where it fails so we can block the merge if it's invalid.”
Technical details
Endpoint
POSThttps://qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/v1/json-schema?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, safe, server-side JSON Schema validation with full error reporting and RE2-safe pattern evaluation — especially useful in agentic pipelines where you need to validate API payloads, config files, or user input against a schema before passing data downstream. Prefer it over client-side validators when you want consistent, sandboxed validation without dependency on a local library, or when your schema uses email, uri, or date-time format keywords that require format validation support.
Side effects
- Invalid or malformed JSON Schema provided — may return a schema parsing error
- Data field missing entirely — validation may fail or return unexpected results
- Schema references external $ref URIs — remote refs may not be resolved
- Regex patterns in schema that are RE2-incompatible are silently safe but may not behave as expected in other validators
- Network timeout on the Lambda endpoint under cold-start conditions
- Payment of $0.001 USDC not fulfilled — request rejected with 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | the JSON value to check |
| schema | object | the JSON Schema |
Tags
x402
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