Validate caller-supplied JSON against Forest bounded JSON Schema subset v1 befor

Validate caller-supplied JSON against Forest bounded JSON Schema subset v1 before an agent trusts or forwards structured output. Returns deterministic machine-readable violations with stable paths; performs no network request, remote $ref resolution, regex evaluation, model inference or mutation. Base mainnet USDC

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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/json/validate

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "schema": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "type": "integer"
        },
        "status": {
          "enum": [
            "ready",
            "blocked"
          ]
        }
      },
      "required": [
        "id",
        "status"
      ],
      "type": "object"
    },
    "value": {
      "id": 42,
      "status": "ready"
    }
  },
  "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": {
            "schema": {
              "description": "Public schema value used to scope this lookup.",
              "type": "object"
            },
            "value": {
              "description": "Public value value used to scope this lookup."
            }
          },
          "required": [
            "value",
            "schema"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "additionalProperties": false,
          "properties": {
            "capability": {
              "const": "json.validate",
              "description": "Public capability value used to scope this lookup."
            },
            "data": {
              "additionalProperties": false,
              "description": "Public data value used to scope this lookup.",
              "properties": {
                "input_bytes": {
                  "description": "Public input bytes value used to scope this lookup.",
                  "maximum": 131072,
                  "minimum": 0,
                  "type": "integer"
                },
                "schema_nodes": {
                  "description": "Public schema nodes value used to scope this lookup.",
                  "maximum": 512,
                  "minimum": 1,
                  "type": "integer"
                },
                "schema_scope": {
                  "const": "forest_bounded_json_schema_subset_v1",
                  "description": "Public schema scope value used to scope this lookup."
                },
                "truncated": {
                  "description": "Public truncated value used to scope this lookup.",
                  "type": "boolean"
                },
                "valid": {
                  "description": "Public valid value used to scope this lookup.",
                  "type": "boolean"
                },
                "value_nodes_visited": {
                  "description": "Public value nodes visited value used to scope this lookup.",
                  "maximum": 10000,
                  "minimum": 0,
                  "type": "integer"
                },
                "violation_count": {
                  "description": "Public violation count value used to scope this lookup.",
                  "maximum": 64,
                  "minimum": 0,
                  "type": "integer"
                },
                "violations": {
                  "description": "Public violations value used to scope this lookup.",
                  "items": {
                    "additionalProperties": false,
                    "properties": {
                      "code": {
                        "description": "Public code value used to scope this lookup.",
                        "enum": [
                          "type",
                          "enum",
                          "const",
                          "minimum",
                          "maximum",
                          "minLength",
                          "maxLength",
                          "minItems",
                          "maxItems",
                          "required",
                          "additionalProperties",
                          "value_too_deep",
                          "work_limit"
                        ]
                      },
                      "message": {
                        "description": "Public message value used to scope this lookup.",
                        "maxLength": 512,
                        "minLength": 1,
                        "type": "string"
                      },
                      "path": {
                        "description": "Repository file path whose public metadata should be checked.",
                        "maxLength": 2048,
                        "minLength": 1,
                        "type": "string"
                      }
                    },
                    "required": [
                      "path",
                      "code",
                      "message"
                    ],
                    "type": "object"
                  },
                  "maxItems": 64,
                  "type": "array"
                }
              },
              "required": [
                "valid",
                "violation_count",
                "violations",
                "truncated",
                "input_bytes",
                "schema_nodes",
                "value_nodes_visited",
                "schema_scope"
              ],
              "type": "object"
            },
            "meta": {
              "additionalProperties": false,
              "description": "Public meta value used to scope this lookup.",
              "properties": {
                "cache": {
                  "description": "Public cache value used to scope this lookup.",
                  "enum": [
                    "hit",
                    "miss",
                    "bypass"
                  ]
                },
                "checked_at": {
                  "description": "Public checked at value used to scope this lookup.",
                  "type": "string"
                },
                "duration_ms": {
                  "description": "Public duration ms value u

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