{
  "generated_at": "2026-04-24T15:01:35.625676+00:00",
  "slug": "3hcvxvrh-nx-link-postleafhash",
  "title": "Witness \u00b7 Post Leaf Hash Attestation",
  "url": "https://3hcvxvrh.nx.link/postLeafHash",
  "category": "tools",
  "summary": "Submit leaf hashes to the Witness attestation protocol for immutable timestamping.",
  "seo": {
    "title": "Blockchain Attestation API | Witness x402",
    "description": "Post cryptographic leaf hashes for blockchain attestation via x402 micropayments. Witness protocol integration. 0.01 USDC per hash. Base network."
  },
  "use_cases": [
    "Timestamp document hashes on blockchain",
    "Create immutable audit trails",
    "Verify data integrity with cryptographic proofs",
    "Build attestation-based verification systems"
  ],
  "ideal_buyer": "Developers building audit trails and integrity verification systems requiring blockchain attestation.",
  "example_prompt": "Post this document hash to Witness for immutable timestamping: 0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3",
  "example_request_body": {
    "leafHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3"
  },
  "risk_notes": [],
  "pricing_sanity": {
    "flag": "normal",
    "ratio": 0.333,
    "median_category_atomic": 30000
  },
  "pricing_review_required": false,
  "pricing_decimal_suspect": false,
  "trust_tier": "indexed_external",
  "accepts": [
    {
      "scheme": "exact",
      "network": "base",
      "pay_to": "0xcbbdecc1287ae7492d75318796b5b3f8cc464694",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "max_amount_required_atomic": "10000",
      "max_timeout_seconds": 300,
      "mime_type": "application/json",
      "description": "Witness API https://api.witness.co - POST postLeafHash",
      "verified": false,
      "hints": {
        "responses": {
          "200": {
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": [
                    "leafHash",
                    "leafIndex"
                  ],
                  "properties": {
                    "leafHash": {
                      "type": "string",
                      "description": "The inserted leaf hash"
                    },
                    "leafIndex": {
                      "type": "string",
                      "description": "The index of the inserted leaf hash"
                    }
                  },
                  "description": "The inserted leaf hash and its index.",
                  "additionalProperties": false
                },
                "example": {
                  "leafHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3",
                  "leafIndex": "123456789"
                }
              }
            },
            "description": "Successful response"
          },
          "default": {
            "$ref": "#/components/responses/error"
          }
        },
        "parameters": [],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "leafHash"
                ],
                "properties": {
                  "leafHash": {
                    "type": "string",
                    "description": "The leaf hash to insert."
                  }
                },
                "additionalProperties": false
              },
              "example": {
                "leafHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3"
              }
            }
          },
          "required": true
        }
      }
    }
  ],
  "duplicate_cluster_id": "finance-cl-0de9882429f3",
  "origin": {
    "slug": "3hcvxvrh-nx-link",
    "host": "3hcvxvrh.nx.link",
    "url": "https://3hcvxvrh.nx.link"
  },
  "json_ld": {
    "@id": "https://x402all.com/resource/3hcvxvrh-nx-link-postleafhash",
    "url": "https://x402all.com/resource/3hcvxvrh-nx-link-postleafhash",
    "name": "Witness \u00b7 Post Leaf Hash Attestation",
    "@type": "WebAPI",
    "offers": {
      "url": "https://x402all.com/resource/3hcvxvrh-nx-link-postleafhash",
      "@type": "Offer",
      "price": "0.01",
      "availability": "https://schema.org/InStock",
      "priceCurrency": "USDC",
      "priceSpecification": {
        "@type": "UnitPriceSpecification",
        "price": "0.010000",
        "unitText": "call",
        "priceCurrency": "USDC"
      },
      "eligibleCustomerType": "Agent",
      "additionalProperty": [
        {
          "@type": "PropertyValue",
          "name": "paymentNetwork",
          "value": "base"
        },
        {
          "@type": "PropertyValue",
          "name": "paymentAsset",
          "value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        }
      ]
    },
    "sameAs": "https://3hcvxvrh.nx.link/postLeafHash",
    "@context": "https://schema.org",
    "provider": {
      "@id": "https://x402all.com/server/3hcvxvrh-nx-link",
      "url": "https://3hcvxvrh.nx.link",
      "name": "3hcvxvrh.nx.link",
      "@type": "Organization"
    },
    "identifier": "3hcvxvrh-nx-link-postleafhash",
    "description": "Post cryptographic leaf hashes for blockchain attestation via x402 micropayments. Witness protocol integration. 0.01 USDC per hash. Base network.",
    "potentialAction": {
      "@type": "BuyAction",
      "target": "https://axon402.com/test-buy?resource=3hcvxvrh-nx-link-postleafhash",
      "description": "Test-buy this endpoint on AXON"
    },
    "applicationCategory": "tools"
  },
  "axon_deep_link": "https://axon402.com/test-buy?resource=3hcvxvrh-nx-link-postleafhash"
}