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AgentResolver JSON Schema Validator
x402
AgentResolver JSON Schema Validator is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-18).
Validates a JSON data string against a provided JSON Schema and returns a boolean result with detailed validation errors
Price / call$0.001
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with a boolean 'valid' field indicating overall pass/fail, an integer 'errorCount', and an 'errors' array where each item includes the JSON path where the error occurred, the JSON Schema keyword that was violated (e.g. 'type', 'required', 'minLength'), and a human-readable error message.
Example use cases
Validate API response before processing
“Before I store this API response, validate it against my expected schema — the JSON is '{"userId":"abc","score":"high"}' and the schema requires userId to be a string and score to be a number. Tell me if it's valid and list any errors.”
Debug failing form submission data
“I'm getting schema validation errors on a form submission. Can you check this JSON '{"email":"","age":-1}' against a schema that requires email to be a non-empty string and age to be a positive integer, and tell me exactly what's wrong?”
Pre-flight check on generated JSON output
“Before I send this LLM-generated JSON to the downstream service, can you validate '{"items":[1,"two",3],"total":"6"}' against a schema that requires items to be an array of numbers and total to be a number, and give me a count of how many errors there are?”
Technical details
Endpoint
POSThttps://agentresolver.vercel.app/api/json-schema-validateWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call JSON Schema validation service without setting up your own validation infrastructure. Ideal for AI agents doing data quality checks, pre-flight validation of generated or received JSON, or debugging schema compliance issues at runtime. Prefer this over embedding a local JSON Schema library when operating in a serverless or agent environment without native validation libraries.
Side effects
- Invalid or unparseable JSON string in 'data' field returns validation failure or 400 error
- Malformed schema object causes schema parsing failure
- Missing required 'data' or 'schema' fields returns error response
- Extremely large JSON payloads may time out or be rejected
- Schema references external $ref URIs that are unreachable may cause schema resolution failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | |
| schema | object |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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