Contribution Exchange

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "com.signalaf/contribution-exchange",
  "description": "Contribution Exchange MCP: domain discovery, policies, preflight, proposals, and signals.",
  "title": "Contribution Exchange",
  "repository": {
    "url": "https://github.com/SunrisesIllNeverSee/sigrank-app",
    "source": "github"
  },
  "version": "1.0.0",
  "websiteUrl": "https://signalaf.com/exchange",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://signalaf.com/api/exchange/mcp"
    }
  ],
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "agent_guide": "https://signalaf.com/agents.md",
      "authentication": {
        "note": "Read-only tools (6) are always visible. Mutation tools (4) require scope headers.",
        "required": false,
        "scopes": {
          "exchange:attempt": "Granted when x-exchange-actor-id header is present. Covers exchange_create_attempt and exchange_submit_attempt.",
          "exchange:propose": "Granted when x-exchange-agent-key or x-exchange-proposer-key header is present. Covers exchange_propose and exchange_create_proposal_from_attempt.",
          "exchange:read": "Always granted. Covers all read-only tools."
        }
      },
      "commitment_schema": "https://signalaf.com/exchange.schema.json",
      "exchange_profile": "https://signalaf.com/.well-known/exchange.json",
      "invariants": [
        "No MCP tool creates a Commitment",
        "No MCP tool grants execution authorization",
        "No MCP tool creates a payment obligation",
        "Proposal is non-binding; Commitments require separate bilateral acceptance",
        "Signals are before proposals and commitments; they do not bypass bilateral Commitment formation"
      ],
      "protocol_versions": [
        "2025-06-18",
        "2025-03-26"
      ],
      "server_card": "https://signalaf.com/.well-known/exchange-mcp.json",
      "tool_count": 10,
      "tools": [
        "exchange_discover_domain",
        "exchange_get_policy",
        "exchange_preflight",
        "exchange_propose",
        "exchange_list_signals",
        "exchange_get_signal",
        "exchange_get_attempt",
        "exchange_create_attempt",
        "exchange_submit_attempt",
        "exchange_create_proposal_from_attempt"
      ]
    }
  }
}