{
      "tool_id": "art-130-signature-directory-validator",
      "tool_version": "1.0.0",
      "display_name": "HTTP Signatures Directory Validator",
      "mcp_name": "validate_signature_directory",
      "mandate_type": "compliance_mandate",
      "wave": 24,
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-130-signature-directory-validator.html",
      "description": "Validate the /.well-known/http-message-signatures-directory JWKS: well-formed, keys are OKP/Ed25519, the keyid from Signature-Input resolves to a key in the directory, well-known path correct. Agent fetches the directory once and passes the JSON. Consumes art-129, feeds art-131.",
      "input_schema_ref": "chaingraph/art-130-signature-directory-validator.html#manifest",
      "consumes": [
        "art-129-webbotauth-signature-verifier"
      ],
      "feeds": [
        "art-131-signature-agent-card-validator"
      ],
      "status": "live",
      "conformance_fixtures": true,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:3826cbd5f7c8d26075aaa4ebe3fa0b1f62f959e159a28b2eb6a153d6f307efcb","valid_from":"2026-07-10"},{"system":"risc0","image_id":"sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6","valid_from":"2026-06-28"}],
      "compute_proof": {
        "type": "ZkVmReceipt",
        "system": "risc0",
        "receiptFormat": "groth16-bn254",
        "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
        "seal": "GkwHoRI81OtxC3geFYnZqL7dHVtMIJB7+5uZopQA20Ir1RPcf/gTgPQP5+p/Hko1hVNnR3i6dW6B9t5kC3tosha9BWJnr+YI/VCC/4HbWcO7mVCOA4MaOzFc/7XaeZ6sEeMYGvvguMzX5APOF7fYfaoviLgjP+YUreFsBiwbGkMIBvjR+0Bglsin7ndP5ro24j+3zOKRc30VzN+pWpSJpw05203QGuF/nzy5QkGTU8h2TcrJ1dPGHVmdLcN8o8eZAoTVtZhd3yrWLL2G2mbnixDR4rkxcqclt96zz5WrUpEpQzyE9LZI6QwtOQ9/cXEL6hrzKeM+leiX9jQkZfsHyg==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:db148368f675c5d641f2c9ea89f3b543c2bd3e2fbf2ab45410f829800ad7ac44",
          "output": {}
        }
      },
      "export_capability": [
        "json",
        "vc"
      ]
    }