MCP (Model Context Protocol)

External tool integration via Model Context Protocol servers.

Files

mcp.md — McpManager, transports (stdio/HTTP), protocol version + MCP-Protocol-Version header, tools/list pagination, structured tool results, media tool results (image/audio/resource → data/mcp_media/ + /api/mcp-media/), cancellation (notifications/cancelled) + Tasks (block-and-poll tasks/get/result/cancel), enable/disable, tool registration
Specification reference (in specs/ subdirectory) — one file per official MCP spec revision, as background for future Skald MCP work. See specs/index.md for the comparative overview:
- specs/2026-07-28-draft.md — Draft / RC: stateless redesign, per-request negotiation, extensions framework
- specs/2025-11-25.md — Latest Stable: OIDC Discovery, icons, URL-mode elicitation, experimental Tasks
- specs/2025-06-18.md — Stable: Streamable HTTP, Elicitation, structured tool output
- specs/2024-11-05.md — Legacy: first public release
Servers (in servers/ subdirectory):
- servers/gmail.md — Gmail read+modify+send MCP server (custom Python)
- servers/gcal.md — Google Calendar read+write MCP server (custom Python)
- servers/gmaps.md — Google Maps transit/directions MCP server (custom Python)
- servers/serpapi_flights.md — SerpAPI Google Flights search MCP server (custom Python)
- servers/whatsapp.md — WhatsApp read+send MCP server (custom Node.js)