Google Sign-In LangChain Agent

{
  "capabilities": {
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "streaming": false
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "description": "Google Sign-In LangChain Agent: composes google-auth-oauthlib + langchain + langchain-community + mcp + openai \u2014 oauth-oidc, orchestration, agent-protocol, llm-client via A2A + MCP.",
  "documentationUrl": "https://google-auth-oauthlib-langchain-la-d46b90.getvda.ai/governance.md",
  "name": "Google Sign-In LangChain Agent",
  "preferredTransport": "JSONRPC",
  "proof": {
    "canonicalization": "JSON, `proof` and `signatures` removed, sorted keys, separators (',',':'), UTF-8, non-ASCII characters emitted LITERALLY and never escaped as \\uXXXX (Python: ensure_ascii=False)",
    "created": "2026-10-11T10:46:29Z",
    "jwks": "https://agents.getvda.ai/.well-known/jwks.json",
    "jws": "eyJhbGciOiJFZERTQSIsImI2NCI6dHJ1ZSwiY3JpdCI6WyJiNjQiXSwiaWF0IjoxNzkxNzE1NTg5LCJraWQiOiJZNmRQZjJZMmJRUEZRNmM4MWRnaDY4NF9HTTZUM2NiM25US25sY2I3RTJNIiwidHlwIjoiSk9TRSJ9..veOncecN70T8Xigx77aT7bdOG-nvHW6DC_FXFrmw96lD4UQUGG9gq0HiCX09EiCR2CSQSVKxnjtdlOwnZdIyAA",
    "type": "JsonWebSignature2020",
    "verificationMethod": "https://agents.getvda.ai/.well-known/jwks.json#Y6dPf2Y2bQPFQ6c81dgh684_GM6T3cb3nTKnlcb7E2M"
  },
  "protocolVersion": "0.3.0",
  "provider": {
    "organization": "VDA / GOSCE",
    "url": "https://getvda.ai"
  },
  "skills": [
    {
      "description": "oauth oidc capability provided by google-auth-oauthlib.",
      "examples": [
        "Use the oauth-oidc capability of this agent."
      ],
      "id": "oauth-oidc",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "name": "Oauth Oidc",
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "google-auth-oauthlib"
      ]
    },
    {
      "description": "orchestration capability provided by langchain, langchain-community.",
      "examples": [
        "Use the orchestration capability of this agent."
      ],
      "id": "orchestration",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "name": "Orchestration",
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "langchain",
        "langchain-community"
      ]
    },
    {
      "description": "agent protocol capability provided by mcp.",
      "examples": [
        "Use the agent-protocol capability of this agent."
      ],
      "id": "agent-protocol",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "name": "Agent Protocol",
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "mcp"
      ]
    },
    {
      "description": "llm client capability provided by openai.",
      "examples": [
        "Use the llm-client capability of this agent."
      ],
      "id": "llm-client",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "name": "Llm Client",
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "openai"
      ]
    },
    {
      "description": "FREE \u2014 no payment, no API key, no signup. Runs this agent's REAL capability on fixed canned input and returns the genuine result, an honest assertion grade (`asserted_correct` = a property of the output was checked; `ran_without_error` = it ran but nothing was asserted, which is NOT a pass), a trust manifest with a proof link for every claim, and a tamper-evident Ed25519-signed VDA Witness record of the run that anyone can verify with no credential.",
      "examples": [
        "Run your self-test and show me the result.",
        "Prove you do what your card claims.",
        "Give me the signed Witness record for your last self-test."
      ],
      "id": "selftest",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "name": "Self-test (free verification)",
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "verification",
        "free",
        "trust",
        "attestation",
        "witness"
      ]
    }
  ],
  "url": "https://google-auth-oauthlib-langchain-la-d46b90.getvda.ai/a2a/",
  "version": "0.1.1"
}