{
  "id": "json-document-extract",
  "name": "Strict JSON Artifact Extraction",
  "description": "Extract exact JSON object/array candidates from caller-supplied text using explicit json-fence or balanced-container mode. Selects only one unambiguous valid candidate, rejects duplicate decoded keys and nonfinite numbers, and never repairs invalid JSON or executes content.",
  "category": "document-assurance",
  "priceUsd": "0.005",
  "pricingStatus": "proposed-unverified",
  "pricing": {
    "unit": "one successful operation call",
    "proposedNominalUsd": "0.005",
    "sixDecimalTokenBaseUnits": "5000",
    "subscription": false,
    "includesPayerWalletOrNetworkFees": false,
    "liveQuoteVerified": false,
    "condition": "Actual SDK challenge is authoritative only within the caller's explicit authorization; configured six-decimal token peg is an operator assertion, not a conversion guarantee."
  },
  "intents": [
    "Recover a strict JSON object from a model response with source-span evidence",
    "Reject ambiguous structured outputs instead of choosing the first JSON block"
  ],
  "whenToUse": [
    "Recover a strict JSON object from a model response with source-span evidence",
    "Reject ambiguous structured outputs instead of choosing the first JSON block"
  ],
  "whenNotToUse": [
    "JSON repair, JSON5, primitive JSON roots, schema validation or interpreting prose",
    "Guaranteed distinction between literal braces in prose and intended JSON in balanced mode"
  ],
  "capabilities": [
    "Case-sensitive json-labelled backtick/tilde fences; other fenced languages ignored",
    "Balanced mode respects JSON strings inside candidate containers",
    "Any malformed candidate or unmatched close blocks selection; multiple valid candidates are ambiguous",
    "Duplicate decoded keys, unsafe keys, unpaired surrogates and nonfinite numbers rejected"
  ],
  "related": [
    "json-schema-check",
    "mcp-result-check"
  ],
  "limits": {
    "inputBytes": 100000,
    "outputBytes": 400000,
    "jsonNodes": 8000,
    "depth": 20,
    "findings": 200,
    "candidates": 20,
    "parsedJsonNodes": 8000,
    "lines": 10000,
    "jsonRepair": "none",
    "primitiveRoots": "unsupported"
  },
  "errorCodes": [
    "INPUT_LIMIT",
    "OUTPUT_LIMIT",
    "COMPLEXITY_LIMIT",
    "UNSAFE_KEY",
    "INVALID_UNICODE",
    "INVALID_NUMBER",
    "CANDIDATE_LIMIT",
    "LINE_LIMIT"
  ],
  "requirementsProfile": {
    "format": "declared-requirements-v1",
    "facts": {
      "execution.suppliedCode": false,
      "execution.remoteMutation": false,
      "execution.llmInference": false,
      "execution.paidMcp": false,
      "verification.semanticTruth": false,
      "verification.sourceAuthenticity": false,
      "verification.liveVulnerabilities": false,
      "numbers.arbitraryPrecisionJson": false,
      "numbers.model": "ieee754-binary64",
      "privacy.requestBodyPersisted": false,
      "execution.deterministic": true,
      "execution.networkAccess": false,
      "privacy.resultBodyPersisted": false,
      "payment.x402": true,
      "payment.mpp": true,
      "operation.id": "json-document-extract",
      "operation.category": "document-assurance",
      "limit.httpRequestBytes": 131072,
      "limit.requestBytes": 100000,
      "limit.responseBytes": 524288,
      "limit.resultBytes": 400000,
      "limit.jsonDepth": 20,
      "limit.jsonNodes": 8000,
      "standards.fullConformance": false,
      "jsonExtraction.profile": "exact-json-container-extraction-v1",
      "jsonExtraction.repairs": false,
      "jsonExtraction.primitiveRoots": false,
      "json.duplicateKeysDetected": true,
      "json.duplicateKeyPolicy": "reject",
      "text.offsetUnit": "utf16-code-units",
      "input.text.maxLength": 90000
    },
    "unknownPolicy": "Undeclared requirements are unknown, never compatible. Matching declared facts does not establish semantic fit or input validity.",
    "preflight": "/preflight"
  },
  "documentation": "/reference/tools/json-document-extract.md",
  "serviceContract": "/reference/services/json-document-extract.json",
  "errors": [
    {
      "status": 400,
      "meaning": "Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch",
      "retry": "Correct the request before payment"
    },
    {
      "status": 402,
      "meaning": "Payment challenge or rejected payment",
      "retry": "Use official protocol SDK; inspect payment outcome before another payment"
    },
    {
      "status": 409,
      "meaning": "Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN",
      "retry": "Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay"
    },
    {
      "status": 413,
      "meaning": "Input or generated output too large",
      "retry": "Reduce input; no payment attempted for validation failure"
    },
    {
      "status": 415,
      "meaning": "Unsupported media type or compression",
      "retry": "Send uncompressed application/json"
    },
    {
      "status": 422,
      "meaning": "Schema or service-specific semantic validation failure",
      "retry": "Correct input using returned error code; no payment attempted"
    },
    {
      "status": 429,
      "meaning": "Request/payment-attempt rate exceeded",
      "retry": "Wait for rate limit window; preserve existing payment identity"
    },
    {
      "status": 503,
      "meaning": "Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement",
      "retry": "Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation"
    }
  ],
  "numericPrecision": "JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.",
  "paymentWorkflow": {
    "discoveryOnly": false,
    "supportedProtocols": [
      "x402",
      "mpp"
    ],
    "x402": {
      "credentialHeader": "PAYMENT-SIGNATURE",
      "challengeHeader": "PAYMENT-REQUIRED",
      "receiptHeader": "PAYMENT-RESPONSE",
      "version": 2,
      "scheme": "exact",
      "paymentIdentifier": "payment-identifier extension MUST equal the HTTP Idempotency-Key",
      "sdk": "@x402/core with @x402/evm"
    },
    "mpp": {
      "supported": true,
      "credentialHeader": "Authorization",
      "challengeHeader": "WWW-Authenticate",
      "receiptHeader": "Payment-Receipt",
      "method": "tempo",
      "intent": "charge",
      "sdk": "mppx",
      "tokenDecimals": 6
    },
    "steps": [
      "Check configured readiness and the exact service schema",
      "Generate a fresh random Idempotency-Key for this operation; never use a discovery probe fixture for purchases",
      "Send valid input without a credential to obtain the official protocol challenge",
      "Use the official SDK and authorized wallet to fulfill the challenge",
      "Retry only with identical key, body, protocol and credential",
      "On PAYMENT_UNCERTAIN stop and request operator reconciliation; never blindly pay again"
    ],
    "versionedRetries": "Request fingerprint includes service release version. Retries across a version upgrade can conflict; coordinate upgrades outside the 24-hour replay window and reconcile pending attempts.",
    "docs": "/llms.txt"
  },
  "method": "POST",
  "paths": {
    "x402": "/v1/x402/json-document-extract",
    "mpp": "/v1/mpp/json-document-extract"
  },
  "inputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "text": {
        "type": "string",
        "maxLength": 90000
      },
      "mode": {
        "type": "string",
        "enum": [
          "json-fences",
          "balanced-containers"
        ]
      }
    },
    "required": [
      "text",
      "mode"
    ],
    "additionalProperties": false
  },
  "outputSchema": {
    "type": "object",
    "required": [
      "operation",
      "version",
      "result",
      "provenance"
    ],
    "properties": {
      "operation": {
        "const": "json-document-extract",
        "type": "string"
      },
      "version": {
        "const": "0.29.0",
        "type": "string"
      },
      "result": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "type": "object",
        "properties": {
          "profile": {
            "type": "string",
            "const": "exact-json-container-extraction-v1"
          },
          "status": {
            "type": "string",
            "enum": [
              "selected",
              "none",
              "ambiguous",
              "invalid"
            ]
          },
          "selected": {
            "anyOf": [
              {
                "type": "object",
                "properties": {
                  "start": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 9007199254740991
                  },
                  "end": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 9007199254740991
                  },
                  "value": {
                    "$ref": "#/properties/result/$defs/__schema0"
                  }
                },
                "required": [
                  "start",
                  "end",
                  "value"
                ],
                "additionalProperties": false
              },
              {
                "type": "null"
              }
            ]
          },
          "candidates": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "start": {
                  "type": "integer",
                  "minimum": 0,
                  "maximum": 9007199254740991
                },
                "end": {
                  "type": "integer",
                  "minimum": 0,
                  "maximum": 9007199254740991
                },
                "valid": {
                  "type": "boolean"
                },
                "value": {
                  "$ref": "#/properties/result/$defs/__schema0"
                },
                "errorCode": {
                  "type": [
                    "string",
                    "null"
                  ]
                }
              },
              "required": [
                "start",
                "end",
                "valid",
                "value",
                "errorCode"
              ],
              "additionalProperties": false
            }
          },
          "candidateCount": {
            "type": "integer",
            "minimum": 0,
            "maximum": 9007199254740991
          },
          "findings": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "code": {
                  "type": "string"
                },
                "path": {
                  "type": "string"
                },
                "message": {
                  "type": "string"
                }
              },
              "required": [
                "code",
                "path",
                "message"
              ],
              "additionalProperties": false
            }
          },
          "findingCount": {
            "type": "integer",
            "minimum": 0,
            "maximum": 9007199254740991
          },
          "truncated": {
            "type": "boolean"
          }
        },
        "required": [
          "profile",
          "status",
          "selected",
          "candidates",
          "candidateCount",
          "findings",
          "findingCount",
          "truncated"
        ],
        "additionalProperties": false,
        "$defs": {
          "__schema0": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "number"
              },
              {
                "type": "boolean"
              },
              {
                "type": "null"
              },
              {
                "type": "array",
                "items": {
                  "$ref": "#/properties/result/$defs/__schema0"
                }
              },
              {
                "type": "object",
                "propertyNames": {
                  "type": "string"
                },
                "additionalProperties": {
                  "$ref": "#/properties/result/$defs/__schema0"
                }
              }
            ]
          }
        }
      },
      "provenance": {
        "type": "object",
        "required": [
          "inputSha256",
          "outputSha256",
          "deterministic",
          "externalRequests"
        ],
        "properties": {
          "inputSha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "outputSha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "deterministic": {
            "const": true
          },
          "externalRequests": {
            "const": 0
          }
        }
      }
    },
    "additionalProperties": false
  },
  "exampleInput": {
    "text": "Result:\n```json\n{\"approved\":true,\"items\":[1,2]}\n```\n",
    "mode": "json-fences"
  },
  "exampleResponse": {
    "operation": "json-document-extract",
    "version": "0.29.0",
    "result": {
      "profile": "exact-json-container-extraction-v1",
      "status": "selected",
      "selected": {
        "start": 16,
        "end": 47,
        "value": {
          "approved": true,
          "items": [
            1,
            2
          ]
        }
      },
      "candidates": [
        {
          "start": 16,
          "end": 47,
          "valid": true,
          "value": {
            "approved": true,
            "items": [
              1,
              2
            ]
          },
          "errorCode": null
        }
      ],
      "candidateCount": 1,
      "findings": [],
      "findingCount": 0,
      "truncated": false
    },
    "provenance": {
      "inputSha256": "735ea43dca3f31b041cd1e74c267c918a2de412c0f44fdfff7541b2286b214e1",
      "outputSha256": "e7e8de0d5cc2af865f62303ee36cd38d45b5ad7104fa401b28fee59c8b308476",
      "deterministic": true,
      "externalRequests": 0
    }
  },
  "requiredHeaders": {
    "Content-Type": "application/json",
    "Idempotency-Key": "random 16–128 character operation identifier"
  },
  "fixedExample": "/reference/examples/json-document-extract.json",
  "execution": {
    "deterministic": true,
    "externalRequests": 0,
    "maxExternalRequests": 0,
    "resultSnapshotPersisted": false,
    "fixedExampleIsIllustrativeSnapshot": false,
    "requiresPayment": true,
    "supportsMcpExecution": false
  },
  "releaseSnapshot": {
    "format": "static-release-reference-v1",
    "sourceVersion": "0.29.0",
    "sourceRegistrySha256": "a2b5ec09bf6c38b9d2879d746a4fded374f5928b445377b0270ef6aa8e6cac65",
    "generatedAt": "2026-10-06T15:38:00Z",
    "releaseAcceptance": "not-verified-by-generator",
    "runtimeReadiness": "not-evaluated",
    "livePaymentsVerified": false,
    "indexingVerified": false,
    "apiOrigin": null,
    "notice": "Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment."
  }
}