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mirrored listing x402 eip155:8453

Validate a JSON value against a JSON Schema and coerce common LLM-output mistakes (numbers

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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1000 (raw units)
price
2
calls / 30d
2
unique payers
2026-09-08
updated

Provider

keyronne.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 60
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "data": {
            "age": "36",
            "name": "Ada"
          },
          "schema": {
            "properties": {
              "age": {
                "type": "integer"
              },
              "name": {
                "type": "string"
              }
            },
            "required": [
              "name",
              "age"
            ],
            "type": "object"
          }
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "errors": [],
          "valid": true,
          "value": {
            "age": 36,
            "name": "Ada"
          },
          "warnings": [
            {
              "message": "coerced string \"36\" to integer",
              "path": "$.age"
            }
          ]
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "body": {
              "properties": {
                "coerce": {
                  "default": true,
                  "description": "Attempt type coercion and default-filling before validating.",
                  "type": "boolean"
                },
                "data": {
                  "description": "The candidate JSON value to validate and coerce."
                },
                "schema": {
                  "description": "JSON Schema (draft-07 style subset: type, properties, required, items, enum, const, additionalProperties, min/max constraints, pattern, default).",
                  "type": "object"
                }
              },
              "required": [
                "schema",
                "data"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "type": "object"
        },
        "output": {
          "properties": {
            "errors": {
              "items": {
                "properties": {
                  "message": {
                    "type": "string"
                  },
                  "path": {
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": "array"
            },
            "valid": {
              "type": "boolean"
            },
            "value": {
              "description": "The (possibly coerced) value."
            },
            "warnings": {
              "items": {
                "properties": {
                  "message": {
                    "type": "string"
                  },
                  "path": {
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": "array"
            }
          },
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://keyronne.com/api/validate-json"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://keyronne.com/api/validate-json");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://keyronne.com/api/validate-json")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/815.json, and this resource appears in /discovery/resources and /discovery/search.