JSON Schema Validation

Validate JSON against a JSON Schema and get each error with its path and message.

Pay by wallet (x402) json-schema-validate

Example

Example answer

{
  "valid": true,
  "errors": [],
  "error_count": 0
}

Inputs

Field	Type	Required	What it is
`data`	any	Yes	JSON data to validate
`schema`	object	Yes	JSON Schema to validate against

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`valid`	boolean	Always (present in every successful answer)
`errors`	array	Always (present in every successful answer)
`error_count`	integer	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "json-schema-validate",
    "inputs": {
      "data": {
        "age": 30,
        "name": "Alice"
      },
      "schema": {
        "type": "object",
        "properties": {
          "age": {
            "type": "integer"
          },
          "name": {
            "type": "string"
          }
        }
      }
    },
    "max_price_cents": 2
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "json-schema-validate",
    "inputs": {
      "data": {
        "age": 30,
        "name": "Alice"
      },
      "schema": {
        "type": "object",
        "properties": {
          "age": {
            "type": "integer"
          },
          "name": {
            "type": "string"
          }
        }
      }
    },
    "max_price_cents": 2
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "json-schema-validate",
  inputs: {
    "data": {
      "age": 30,
      "name": "Alice"
    },
    "schema": {
      "type": "object",
      "properties": {
        "age": {
          "type": "integer"
        },
        "name": {
          "type": "string"
        }
      }
    }
  },
  max_price_cents: 2,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="json-schema-validate",
    inputs={
        "data": {
            "age": 30,
            "name": "Alice",
        },
        "schema": {
            "type": "object",
            "properties": {
                "age": {
                    "type": "integer",
                },
                "name": {
                    "type": "string",
                },
            },
        },
    },
    max_price_cents=2,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i -X POST https://api.strale.io/x402/v2/json-schema-validate \
  -H 'Content-Type: application/json' \
  -d '{
    "data": {
      "age": 30,
      "name": "Alice"
    },
    "schema": {
      "type": "object",
      "properties": {
        "age": {
          "type": "integer"
        },
        "name": {
          "type": "string"
        }
      }
    }
  }'

Limitations

Only JSON Schema Draft-07 is supported
Validates against JSON Schema Draft-07 — newer drafts (2019-09, 2020-12) may have features not fully supported
What to do instead: Specify your target draft version and test edge cases with draft-specific keywords like $dynamicRef

Related tools

JSON Diff €0.03