JSON Schema Validator · keyronne.com

Validate a JSON value against a JSON Schema and coerce common…

Validate a JSON value against a JSON Schema and coerce common LLM-output mistakes (numbers as strings, stringified booleans, scalars where arrays are expected, missing defaults, extra properties). Returns the coerced value plus a structured error report. Built for cleaning up LLM tool-call arguments and structured outputs. POST a JSON body like: {"schema":{"type":"object","required":["name","age"],"properties":{"name":{"type":"string"},"age":{"type":"integer"}}},"data":{"name":"Ada","age":"36"}}

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Sample input

input4 keys

body2 keys

data{ age, name }2 keys

schema{ properties, required, type }3 keys

bodyType"json"

method"POST"

type"http"

inputobject, 4 keys

Sample response

response4 keys

errors0 items

validtrue

value2 keys

age36

name"Ada"

warnings1 item

0{ message, path }2 keys

responseobject, 4 keys

Track record

Paid calls, last 30 days: 1
Buyers, last 30 days: 1
Last paid call: 2 weeks ago

Reported by the x402 directory.

A$0.0015 per call

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