Capability Host Protocol

{
  "protocolVersion": "0.3.0",
  "name": "Capability Host Protocol",
  "description": "CHP is the open evidence layer for the agentic web. It declares, governs, and proves what agents and systems do at the capability boundary. Discover capabilities here; invoke them via the MCP endpoint; every action becomes replayable, tamper-evident evidence.",
  "version": "0.8.0",
  "url": "https://capabilityhostprotocol.com/api/mcp",
  "preferredTransport": "JSONRPC",
  "provider": {
    "organization": "Capability Host Protocol",
    "url": "https://capabilityhostprotocol.com"
  },
  "documentationUrl": "https://docs.capabilityhostprotocol.com",
  "iconUrl": "https://capabilityhostprotocol.com/icon.svg",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": true
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/markdown"
  ],
  "skills": [
    {
      "id": "discover-capabilities",
      "name": "Discover capabilities",
      "description": "List the named, versioned, evidence-wrapped capabilities the open CHP adapter ecosystem declares, by category.",
      "tags": [
        "discovery",
        "capabilities",
        "chp"
      ],
      "examples": [
        "What capabilities can CHP host?",
        "List the AI & inference capabilities."
      ]
    },
    {
      "id": "get-capability-descriptor",
      "name": "Get a capability descriptor",
      "description": "Resolve a capability id to its CapabilityDescriptor \u2014 identity, version, policy, and whether it emits provable evidence.",
      "tags": [
        "capabilities",
        "descriptor",
        "governance"
      ],
      "examples": [
        "Describe chp.adapters.github.create_issue."
      ]
    },
    {
      "id": "browse-adapters",
      "name": "Browse adapters",
      "description": "Browse the open adapter ecosystem that turns provider actions into governed CHP capabilities.",
      "tags": [
        "adapters",
        "ecosystem"
      ],
      "examples": [
        "What adapters cover code and DevOps?"
      ]
    },
    {
      "id": "explain-protocol",
      "name": "Explain the protocol",
      "description": "Answer questions about the CHP spec, schemas, evidence model, and conformance.",
      "tags": [
        "spec",
        "docs",
        "evidence"
      ],
      "examples": [
        "How does CHP make evidence tamper-evident?"
      ]
    }
  ],
  "additionalInterfaces": [
    {
      "url": "https://capabilityhostprotocol.com/api/mcp",
      "transport": "MCP"
    },
    {
      "url": "https://capabilityhostprotocol.com/.well-known/capabilities.json",
      "transport": "capabilities.txt"
    }
  ],
  "x-chp": {
    "role": "evidence-layer",
    "capabilitiesTxt": "https://capabilityhostprotocol.com/capabilities.txt",
    "capabilitiesManifest": "https://capabilityhostprotocol.com/.well-known/capabilities.json",
    "mcpServerCard": "https://capabilityhostprotocol.com/.well-known/mcp/server-card.json",
    "categories": [
      {
        "id": "agents",
        "label": "Agent operations",
        "adapters": 8
      },
      {
        "id": "ai",
        "label": "AI & inference",
        "adapters": 12
      },
      {
        "id": "cloud",
        "label": "Cloud",
        "adapters": 7
      },
      {
        "id": "code",
        "label": "Code & DevOps",
        "adapters": 4
      },
      {
        "id": "data",
        "label": "Data & knowledge",
        "adapters": 9
      },
      {
        "id": "filesystem",
        "label": "Files & storage",
        "adapters": 3
      },
      {
        "id": "infra",
        "label": "Infrastructure",
        "adapters": 10
      },
      {
        "id": "messaging",
        "label": "Messaging",
        "adapters": 4
      },
      {
        "id": "network",
        "label": "Network & APIs",
        "adapters": 6
      },
      {
        "id": "platform",
        "label": "Platform",
        "adapters": 2
      }
    ],
    "note": "Web Bot Auth answers who an agent is; CHP answers what it did, whether it was allowed, and proves it."
  }
}