Every agent and developer hits broken or confusing JSON

Every agent and developer hits broken or confusing JSON. This tool handles the common headaches in one place: check whether JSON is valid with the exact error location, repair near-JSON with typos, pretty-print or minify, pull values out with a path expression, diff two documents, convert to and from YAML or CSV, produce a byte-stable canonical form for hashing, validate against a schema, and report size and structure. Same input, same output, no side effects.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://json-suite.underscoredone.com/json

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "data": {
      "order": {
        "id": "A-1029",
        "items": [
          {
            "qty": 2,
            "sku": "BIL-CUE-07"
          },
          {
            "qty": 5,
            "sku": "BIL-CHALK-01"
          }
        ]
      }
    },
    "op": "query",
    "options": {
      "jsonpath": "$.order.items[*].sku"
    }
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "data": {
              "description": "The JSON value you want to work with - can be an object, array, string, number, or anything valid. Required for all operations except validate and repair (which use data_raw instead).",
              "type": "object"
            },
            "data_raw": {
              "description": "The raw text you want to validate or repair. Use this instead of data only for the validate and repair operations, because those need to see the original broken text exactly as-is.",
              "type": "string"
            },
            "op": {
              "description": "What you want to do. Choose one of: validate, repair, format, canonicalize, convert, query, diff, patch, schema, stats.",
              "type": "string"
            },
            "options": {
              "description": "Extra settings for the chosen operation. For example: indent, sort_keys, jsonpath, pointer, to (for convert), schema, data_b (for diff/patch). All optional - the API uses sensible defaults.",
              "type": "object"
            }
          },
          "required": [
            "op"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "api_version": {
              "type": "string"
            },
            "match_count": {
              "type": "integer"
            },
            "matches": {
              "items": {
                "type": "object"
              },
              "type": "array"
            },
            "op": {
              "type": "string"
            },
            "valid": {
              "type": "boolean"
            }
          },
          "required": [
            "api_version",
            "op",
            "valid",
            "matches",
            "match_count"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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