Client compatibility

MCP client compatibility

Drop-in configuration snippets for the popular MCP clients. The endpoint is the public demo store; replace with your own slug for production.

Integration patterns by bucket

Each typical client picks the MCP bucket based on operation scope. Discovery (anonymous) → Customer (OAuth) → Checkout (AgenticTrust + idempotency).

Client	Recommended bucket	Why
Claude.ai agent	discovery → customer → checkout	Starts in Discovery (no login). If the user signs in via Custom Connector, escalates to Customer. Checkout requires a mandate signed by the principal.
KYApay (agent payment service)	checkout	Only calls transactional tools with AgenticTrust + Idempotency-Key. Does not need Discovery or Customer scope.
ChatGPT Custom GPT	discovery (vía OpenAPI Action)	ChatGPT does not implement MCP transport. We map Discovery to an OpenAPI Action; Customer/Checkout are not exposed to custom GPTs.
Custom agent (own SDK)	scope-driven	Detect capabilities via /.well-known/mcp.json. Each bucket publishes its own descriptor + independent JWKS.

Legacy /{storeSlug}/mcp deprecated — migrate to the per-bucket endpoints. Migration guide.

Claude Desktop

Transport: MCP Streamable HTTP
Authentication: OAuth 2.1 web flow on first call (Discovery via /.well-known/oauth-protected-resource).

Configuration — claude_desktop_config.json

{
  "mcpServers": {
    "trusteed": {
      "url": "https://trusteed.xyz/demo-store/mcp",
      "transport": "streamable-http"
    }
  }
}

Official client docs →

Claude.ai (Custom Connectors)

Transport: MCP Streamable HTTP
Authentication: Browser OAuth flow within Claude.ai when connector is added.

Configuration — Settings → Connectors → Add Custom Connector

URL: https://trusteed.xyz/demo-store/mcp
Name: Trusteed
(OAuth handled in-browser by Claude.ai)

Official client docs →

ChatGPT / GPT Builder

Transport: OpenAPI Action
Authentication: API key (header X-Agent-Api-Key) — ChatGPT does NOT yet implement MCP transport.

Limitations

MCP transport is not supported in ChatGPT custom GPTs. Use the REST API via OpenAPI Action; the PostMessage build is for the ChatGPT Apps SDK only, not Claude.ai.

Configuration — GPT Builder → Actions → Import OpenAPI

OpenAPI URL: https://api.trusteed.xyz/api/v1/openapi.json
Auth: API key, custom header "X-Agent-Api-Key"

Official client docs →

Cursor

Transport: MCP Streamable HTTP
Authentication: OAuth 2.1 launched from Cursor on first tool call.

Configuration — ~/.cursor/mcp.json

{
  "mcpServers": {
    "trusteed": {
      "url": "https://trusteed.xyz/demo-store/mcp",
      "type": "http"
    }
  }
}

Official client docs →

Continue.dev

Transport: MCP Streamable HTTP
Authentication: OAuth 2.1 (web flow on first call).

Configuration — ~/.continue/config.json

{
  "experimental": {
    "modelContextProtocolServers": [
      {
        "transport": { "type": "streamable-http", "url": "https://trusteed.xyz/demo-store/mcp" }
      }
    ]
  }
}

Official client docs →