{
  "generated_at": "2026-04-24T15:01:35.625676+00:00",
  "slug": "api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
  "title": "Engrave Protocol \u00b7 Check Transaction Output Spends",
  "url": "https://api.engrave-protocol.ai/api/v1/mempool/tx/outspends",
  "category": "data",
  "summary": "Returns spend status for transaction outputs, indicating whether specific UTXO-like outputs have been consumed.",
  "seo": {
    "title": "Engrave Protocol Mempool Outspend API | x402 Pay-Per-Call",
    "description": "Check if transaction outputs have been spent on Solana. Query mempool tx outspend status for $0.01 USDC per call via x402."
  },
  "use_cases": [
    "Verify payment receipt before releasing goods or services",
    "Detect double-spend attempts in transaction monitoring",
    "Confirm settlement status for cross-chain operations"
  ],
  "ideal_buyer": "Payment processors, cross-chain bridge operators, and transaction monitoring services requiring spend confirmation.",
  "example_prompt": "Check if transaction output 5a3b...c4d2 has been spent.",
  "risk_notes": [],
  "pricing_sanity": {
    "flag": "normal",
    "ratio": 0.5,
    "median_category_atomic": 20000
  },
  "pricing_review_required": false,
  "pricing_decimal_suspect": false,
  "trust_tier": "indexed_external",
  "accepts": [
    {
      "scheme": "exact",
      "network": "solana",
      "pay_to": "2bwTtMvLVvCtLZiNfjWjPJ8GYNjnU2evQyonCSHmPP2T",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "max_amount_required_atomic": "10000",
      "max_timeout_seconds": 60,
      "mime_type": "application/json",
      "description": "Get transaction output spend status",
      "verified": false,
      "hints": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "txid": {
              "type": "string",
              "required": true,
              "description": "Transaction ID (64 hex characters)"
            }
          }
        },
        "output": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "vin": {
                "type": "number"
              },
              "txid": {
                "type": "string"
              },
              "spent": {
                "type": "boolean"
              }
            }
          }
        }
      }
    }
  ],
  "duplicate_cluster_id": "data-cl-164eb67f5aff",
  "origin": {
    "slug": "api-engrave-protocol-ai",
    "host": "api.engrave-protocol.ai",
    "url": "https://api.engrave-protocol.ai",
    "favicon": "https://engrave-protocol.ai/favicon-32x32.png"
  },
  "json_ld": {
    "@id": "https://x402all.com/resource/api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
    "url": "https://x402all.com/resource/api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
    "name": "Engrave Protocol \u00b7 Check Transaction Output Spends",
    "@type": "WebAPI",
    "offers": {
      "url": "https://x402all.com/resource/api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
      "@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": "solana"
        },
        {
          "@type": "PropertyValue",
          "name": "paymentAsset",
          "value": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
        }
      ]
    },
    "sameAs": "https://api.engrave-protocol.ai/api/v1/mempool/tx/outspends",
    "@context": "https://schema.org",
    "provider": {
      "@id": "https://x402all.com/server/api-engrave-protocol-ai",
      "url": "https://api.engrave-protocol.ai",
      "name": "api.engrave-protocol.ai",
      "@type": "Organization"
    },
    "identifier": "api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
    "description": "Check if transaction outputs have been spent on Solana. Query mempool tx outspend status for $0.01 USDC per call via x402.",
    "potentialAction": {
      "@type": "BuyAction",
      "target": "https://axon402.com/test-buy?resource=api-engrave-protocol-ai-api-v1-mempool-tx-outspends",
      "description": "Test-buy this endpoint on AXON"
    },
    "applicationCategory": "data"
  },
  "axon_deep_link": "https://axon402.com/test-buy?resource=api-engrave-protocol-ai-api-v1-mempool-tx-outspends"
}