{
  "schemaVersion": "1.0",
  "item": {
    "slug": "xproof",
    "name": "xProof — Blockchain Proof for Agents",
    "source": "tencent",
    "type": "skill",
    "category": "AI 智能",
    "sourceUrl": "https://clawhub.ai/jasonxkensei/xproof",
    "canonicalUrl": "https://clawhub.ai/jasonxkensei/xproof",
    "targetPlatform": "OpenClaw"
  },
  "install": {
    "downloadMode": "redirect",
    "downloadUrl": "/downloads/xproof",
    "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=xproof",
    "sourcePlatform": "tencent",
    "targetPlatform": "OpenClaw",
    "installMethod": "Manual import",
    "extraction": "Extract archive",
    "prerequisites": [
      "OpenClaw"
    ],
    "packageFormat": "ZIP package",
    "includedAssets": [
      "SKILL.md"
    ],
    "primaryDoc": "SKILL.md",
    "quickSetup": [
      "Download the package from Yavira.",
      "Extract the archive and review SKILL.md first.",
      "Import or place the package into your OpenClaw setup."
    ],
    "agentAssist": {
      "summary": "Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.",
      "steps": [
        "Download the package from Yavira.",
        "Extract it into a folder your agent can access.",
        "Paste one of the prompts below and point your agent at the extracted folder."
      ],
      "prompts": [
        {
          "label": "New install",
          "body": "I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete."
        },
        {
          "label": "Upgrade existing",
          "body": "I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run."
        }
      ]
    },
    "sourceHealth": {
      "source": "tencent",
      "status": "healthy",
      "reason": "direct_download_ok",
      "recommendedAction": "download",
      "checkedAt": "2026-04-30T16:55:25.780Z",
      "expiresAt": "2026-05-07T16:55:25.780Z",
      "httpStatus": 200,
      "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=network",
      "contentType": "application/zip",
      "probeMethod": "head",
      "details": {
        "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=network",
        "contentDisposition": "attachment; filename=\"network-1.0.0.zip\"",
        "redirectLocation": null,
        "bodySnippet": null
      },
      "scope": "source",
      "summary": "Source download looks usable.",
      "detail": "Yavira can redirect you to the upstream package for this source.",
      "primaryActionLabel": "Download for OpenClaw",
      "primaryActionHref": "/downloads/xproof"
    },
    "validation": {
      "installChecklist": [
        "Use the Yavira download entry.",
        "Review SKILL.md after the package is downloaded.",
        "Confirm the extracted package contains the expected setup assets."
      ],
      "postInstallChecks": [
        "Confirm the extracted package includes the expected docs or setup files.",
        "Validate the skill or prompts are available in your target agent workspace.",
        "Capture any manual follow-up steps the agent could not complete."
      ]
    },
    "downloadPageUrl": "https://openagent3.xyz/downloads/xproof",
    "agentPageUrl": "https://openagent3.xyz/skills/xproof/agent",
    "manifestUrl": "https://openagent3.xyz/skills/xproof/agent.json",
    "briefUrl": "https://openagent3.xyz/skills/xproof/agent.md"
  },
  "agentAssist": {
    "summary": "Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.",
    "steps": [
      "Download the package from Yavira.",
      "Extract it into a folder your agent can access.",
      "Paste one of the prompts below and point your agent at the extracted folder."
    ],
    "prompts": [
      {
        "label": "New install",
        "body": "I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete."
      },
      {
        "label": "Upgrade existing",
        "body": "I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run."
      }
    ]
  },
  "documentation": {
    "source": "clawhub",
    "primaryDoc": "SKILL.md",
    "sections": [
      {
        "title": "xProof — Blockchain Proof of Existence for Agents",
        "body": "xProof anchors agent outputs to the MultiversX blockchain. Any text, hash, file, or decision becomes a permanent, tamper-proof record with a verifiable on-chain certificate.\n\nUse this skill when:\n\nCertifying agent outputs, decisions, or reports that need to be verifiable\nAnchoring content before it is shared, published, or acted upon\nBuilding audit trails for autonomous agent pipelines\nProving a document or output existed at a specific point in time"
      },
      {
        "title": "Authentication",
        "body": "Option 1 — API Key (recommended):\nSet XPROOF_API_KEY in your environment. Get a key at https://xproof.app.\n\nOption 2 — x402 (no account required):\nSend USDC on Base. The API returns a 402 with payment instructions; include the X-Payment header (base64-encoded JSON) in your follow-up request."
      },
      {
        "title": "Certify Text or a Hash",
        "body": "# Certify text content\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\n    \"content\": \"The agent decided: deploy to production at 2026-02-20T14:00:00Z\",\n    \"metadata\": {\"agent\": \"deploy-bot\", \"pipeline\": \"release-v2.1\"}\n  }'\n\n# Certify a SHA-256 hash (if you already have it)\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"hash\": \"sha256:<64-char-hex>\"}'\n\nResponse:\n\n{\n  \"id\": \"cert_abc123\",\n  \"status\": \"pending\",\n  \"hash\": \"sha256:...\",\n  \"txHash\": \"...\",\n  \"blockchainUrl\": \"https://explorer.multiversx.com/transactions/...\",\n  \"verifyUrl\": \"https://xproof.app/verify/cert_abc123\",\n  \"certifiedAt\": \"2026-02-20T14:00:05Z\"\n}"
      },
      {
        "title": "Certify a File",
        "body": "# Hash a file locally and certify the hash\nFILE_HASH=$(sha256sum report.pdf | awk '{print $1}')\n\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \"{\\\"hash\\\": \\\"sha256:${FILE_HASH}\\\", \\\"metadata\\\": {\\\"filename\\\": \\\"report.pdf\\\"}}\""
      },
      {
        "title": "Batch Certify (up to 50)",
        "body": "curl -s -X POST https://xproof.app/api/batch \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\n    \"proofs\": [\n      {\"content\": \"Output 1\"},\n      {\"content\": \"Output 2\"},\n      {\"hash\": \"sha256:<hash-3>\"}\n    ]\n  }'"
      },
      {
        "title": "Verify a Certificate",
        "body": "# By certificate ID\ncurl -s https://xproof.app/api/proof/cert_abc123\n\n# Response includes on-chain status: pending | confirmed | failed"
      },
      {
        "title": "MX-8004 Integration (MultiversX Agent Validation Loop)",
        "body": "xProof implements the full MX-8004 validation loop. To submit a certified proof as an on-chain MX-8004 validation:\n\n# Step 1: Certify the output\nCERT=$(curl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"content\": \"Agent output to validate\"}')\n\nCERT_ID=$(echo $CERT | jq -r '.id')\nCERT_HASH=$(echo $CERT | jq -r '.hash')\n\n# Step 2: Submit as MX-8004 proof (handled by xProof internally)\n# xProof anchors on MultiversX and calls giveFeedback on the Validation Registry.\n# The verifyUrl in the response is the permanent on-chain reference.\necho \"Certificate: $CERT_ID\"\necho \"Verify at: $(echo $CERT | jq -r '.verifyUrl')\""
      },
      {
        "title": "x402 Payment (No Account Required)",
        "body": "# Step 1: Attempt the request — receive 402\nRESPONSE=$(curl -s -w \"\\n%{http_code}\" -X POST https://xproof.app/api/proof \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"content\": \"Certify this\"}')\n\nHTTP_CODE=$(echo \"$RESPONSE\" | tail -1)\nBODY=$(echo \"$RESPONSE\" | head -1)\n\nif [ \"$HTTP_CODE\" = \"402\" ]; then\n  # Step 2: Parse payment instructions and pay with USDC on Base\n  # Then resubmit with X-Payment header (base64-encoded payment JSON)\n  echo \"Payment required: $(echo $BODY | jq -r '.accepts[0]')\"\nfi"
      },
      {
        "title": "MCP Server",
        "body": "xProof exposes an MCP server at https://xproof.app/mcp.\n\nAdd to your OpenClaw config:\n\n{\n  \"mcp\": {\n    \"servers\": {\n      \"xproof\": {\n        \"url\": \"https://xproof.app/mcp\",\n        \"headers\": {\"Authorization\": \"Bearer ${XPROOF_API_KEY}\"}\n      }\n    }\n  }\n}\n\nAvailable MCP tools: certify_content, certify_hash, certify_batch, verify_proof."
      },
      {
        "title": "Pricing",
        "body": "VolumePrice0 - 100K certs/month$0.05/cert100K - 1M certs/month$0.025/cert1M+ certs/month$0.01/cert\n\nCheck current pricing: curl https://xproof.app/api/pricing"
      },
      {
        "title": "Security & Privacy",
        "body": "Content submitted via content field is hashed server-side before anchoring; the original text is not stored on-chain.\nOnly the SHA-256 hash and optional metadata are written to MultiversX.\nAPI keys are scoped to a single account and can be rotated at https://xproof.app.\nx402 payments are processed on Base; no account or email required.\n\nExternal endpoints called: https://xproof.app only.\n\nBy using this skill, hashes and optional metadata are sent to xproof.app for blockchain anchoring on MultiversX."
      },
      {
        "title": "Resources",
        "body": "Homepage: https://xproof.app\nAPI docs: https://xproof.app/llms.txt\nFull reference: https://xproof.app/llms-full.txt\nAgent manifest: https://xproof.app/.well-known/agent.json\nMCP Registry: https://registry.modelcontextprotocol.io/v0/servers?search=xproof\nMultiversX explorer: https://explorer.multiversx.com"
      }
    ],
    "body": "xProof — Blockchain Proof of Existence for Agents\n\nxProof anchors agent outputs to the MultiversX blockchain. Any text, hash, file, or decision becomes a permanent, tamper-proof record with a verifiable on-chain certificate.\n\nUse this skill when:\n\nCertifying agent outputs, decisions, or reports that need to be verifiable\nAnchoring content before it is shared, published, or acted upon\nBuilding audit trails for autonomous agent pipelines\nProving a document or output existed at a specific point in time\nAuthentication\n\nOption 1 — API Key (recommended): Set XPROOF_API_KEY in your environment. Get a key at https://xproof.app.\n\nOption 2 — x402 (no account required): Send USDC on Base. The API returns a 402 with payment instructions; include the X-Payment header (base64-encoded JSON) in your follow-up request.\n\nCertify Text or a Hash\n# Certify text content\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\n    \"content\": \"The agent decided: deploy to production at 2026-02-20T14:00:00Z\",\n    \"metadata\": {\"agent\": \"deploy-bot\", \"pipeline\": \"release-v2.1\"}\n  }'\n\n# Certify a SHA-256 hash (if you already have it)\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"hash\": \"sha256:<64-char-hex>\"}'\n\n\nResponse:\n\n{\n  \"id\": \"cert_abc123\",\n  \"status\": \"pending\",\n  \"hash\": \"sha256:...\",\n  \"txHash\": \"...\",\n  \"blockchainUrl\": \"https://explorer.multiversx.com/transactions/...\",\n  \"verifyUrl\": \"https://xproof.app/verify/cert_abc123\",\n  \"certifiedAt\": \"2026-02-20T14:00:05Z\"\n}\n\nCertify a File\n# Hash a file locally and certify the hash\nFILE_HASH=$(sha256sum report.pdf | awk '{print $1}')\n\ncurl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \"{\\\"hash\\\": \\\"sha256:${FILE_HASH}\\\", \\\"metadata\\\": {\\\"filename\\\": \\\"report.pdf\\\"}}\"\n\nBatch Certify (up to 50)\ncurl -s -X POST https://xproof.app/api/batch \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\n    \"proofs\": [\n      {\"content\": \"Output 1\"},\n      {\"content\": \"Output 2\"},\n      {\"hash\": \"sha256:<hash-3>\"}\n    ]\n  }'\n\nVerify a Certificate\n# By certificate ID\ncurl -s https://xproof.app/api/proof/cert_abc123\n\n# Response includes on-chain status: pending | confirmed | failed\n\nMX-8004 Integration (MultiversX Agent Validation Loop)\n\nxProof implements the full MX-8004 validation loop. To submit a certified proof as an on-chain MX-8004 validation:\n\n# Step 1: Certify the output\nCERT=$(curl -s -X POST https://xproof.app/api/proof \\\n  -H \"Authorization: Bearer $XPROOF_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"content\": \"Agent output to validate\"}')\n\nCERT_ID=$(echo $CERT | jq -r '.id')\nCERT_HASH=$(echo $CERT | jq -r '.hash')\n\n# Step 2: Submit as MX-8004 proof (handled by xProof internally)\n# xProof anchors on MultiversX and calls giveFeedback on the Validation Registry.\n# The verifyUrl in the response is the permanent on-chain reference.\necho \"Certificate: $CERT_ID\"\necho \"Verify at: $(echo $CERT | jq -r '.verifyUrl')\"\n\nx402 Payment (No Account Required)\n# Step 1: Attempt the request — receive 402\nRESPONSE=$(curl -s -w \"\\n%{http_code}\" -X POST https://xproof.app/api/proof \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"content\": \"Certify this\"}')\n\nHTTP_CODE=$(echo \"$RESPONSE\" | tail -1)\nBODY=$(echo \"$RESPONSE\" | head -1)\n\nif [ \"$HTTP_CODE\" = \"402\" ]; then\n  # Step 2: Parse payment instructions and pay with USDC on Base\n  # Then resubmit with X-Payment header (base64-encoded payment JSON)\n  echo \"Payment required: $(echo $BODY | jq -r '.accepts[0]')\"\nfi\n\nMCP Server\n\nxProof exposes an MCP server at https://xproof.app/mcp.\n\nAdd to your OpenClaw config:\n\n{\n  \"mcp\": {\n    \"servers\": {\n      \"xproof\": {\n        \"url\": \"https://xproof.app/mcp\",\n        \"headers\": {\"Authorization\": \"Bearer ${XPROOF_API_KEY}\"}\n      }\n    }\n  }\n}\n\n\nAvailable MCP tools: certify_content, certify_hash, certify_batch, verify_proof.\n\nPricing\nVolume\tPrice\n0 - 100K certs/month\t$0.05/cert\n100K - 1M certs/month\t$0.025/cert\n1M+ certs/month\t$0.01/cert\n\nCheck current pricing: curl https://xproof.app/api/pricing\n\nSecurity & Privacy\nContent submitted via content field is hashed server-side before anchoring; the original text is not stored on-chain.\nOnly the SHA-256 hash and optional metadata are written to MultiversX.\nAPI keys are scoped to a single account and can be rotated at https://xproof.app.\nx402 payments are processed on Base; no account or email required.\n\nExternal endpoints called: https://xproof.app only.\n\nBy using this skill, hashes and optional metadata are sent to xproof.app for blockchain anchoring on MultiversX.\n\nResources\nHomepage: https://xproof.app\nAPI docs: https://xproof.app/llms.txt\nFull reference: https://xproof.app/llms-full.txt\nAgent manifest: https://xproof.app/.well-known/agent.json\nMCP Registry: https://registry.modelcontextprotocol.io/v0/servers?search=xproof\nMultiversX explorer: https://explorer.multiversx.com"
  },
  "trust": {
    "sourceLabel": "tencent",
    "provenanceUrl": "https://clawhub.ai/jasonxkensei/xproof",
    "publisherUrl": "https://clawhub.ai/jasonxkensei/xproof",
    "owner": "jasonxkensei",
    "version": "1.2.0",
    "license": null,
    "verificationStatus": "Indexed source record"
  },
  "links": {
    "detailUrl": "https://openagent3.xyz/skills/xproof",
    "downloadUrl": "https://openagent3.xyz/downloads/xproof",
    "agentUrl": "https://openagent3.xyz/skills/xproof/agent",
    "manifestUrl": "https://openagent3.xyz/skills/xproof/agent.json",
    "briefUrl": "https://openagent3.xyz/skills/xproof/agent.md"
  }
}