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Sindri JSON Schema Validator
x402
Sindri JSON Schema Validator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Validates a JSON document against a provided JSON Schema using the ajv validator, returning a validity flag and human-readable error messages.
Price / call$0.01
Success—
StatusUnknown
How this service works
Validates a JSON document against a JSON Schema using the industry-standard ajv validator, returning whether it is valid and a list of human-readable error messages if not.
Output
Returns a validity boolean indicating whether the document conforms to the schema, plus a list of human-readable error messages (each describing the exact field path and constraint violation) when validation fails. If valid, the error list is empty.
Example use cases
API request body validation
“Before I send this request to our payment API, validate this JSON payload against the payment schema to catch any type mismatches or missing required fields — schema is {"type":"object","required":["amount","currency"],"properties":{"amount":{"type":"number"},"currency":{"type":"string"}}} and the document is {"amount":"100","currency":"USD"}.”
Config file correctness check
“I have a deployment config JSON and a strict schema for it — can you check whether the config is valid and give me a plain-English list of any problems? Schema: {"type":"object","required":["host","port"],"properties":{"host":{"type":"string"},"port":{"type":"integer"}}} and config: {"host":"localhost"}.”
User form submission validation
“A user submitted this JSON form data and I need to know if it passes our user registration schema before storing it — schema requires 'email' as a string and 'age' as an integer at minimum, and the submitted data is {"email":42,"username":"jdoe"}.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/jsonSchemaValidateWhen to prefer
Choose this endpoint when you need programmatic, standards-compliant JSON Schema validation with human-readable error messages powered by ajv — the industry-standard validator. Ideal for agents validating API payloads, form data, or config files on-the-fly without running local code. Prefer over custom validators when ajv compatibility and clear error messaging matter.
Side effects
- Schema or document exceeds 50KB serialized limit — request rejected
- Malformed or invalid JSON Schema object provided — ajv may throw a parse/compile error
- Missing 'schema' or 'document' fields in request body — returns error
- Document is null or non-JSON — validation fails or errors returned
- Payment not included or insufficient — 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | object | A JSON Schema object. Max 50KB serialized. |
| document | — | The JSON document to validate against the schema. Max 50KB serialized. |
Tags
x402
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