Runway MCP is Streamable HTTP only: connecting Sume the same way

Runway's help page says its MCP currently supports only Streamable HTTP, not SSE or stdio, and that an SSE connection returns a 405. Sume's hosted MCP is likewise a single remote URL, https://mcp.sume.com/mcp, which the quickstart connects with an HTTP transport. If your client lets you pick a transport, choose HTTP or Streamable HTTP for both.

Two connectors compared

Add both to Cursor

Cursor's mcp.json takes a url entry for each remote server. After saving, press Connect next to each and sign in; for Sume, consent is on the MCP host.

{
  "mcpServers": {
    "Runway": { "url": "https://mcp.runwayml.com/mcp" },
    "sume": { "url": "https://mcp.sume.com/mcp" }
  }
}

Claude Code

For Claude Code, the Sume quickstart gives two commands: add the server with an HTTP transport, then log in. Ask the client to call tools_list or mcp_health to confirm.

claude mcp add --transport http sume https://mcp.sume.com/mcp
claude mcp login sume

If something fails

• A 405 on Runway usually means the client chose SSE; switch the transport to HTTP.
• Check the client's MCP log; Runway's page points Cursor users at the MCP Logs panel.
• On Sume, call mcp_health and confirm authenticated.auth_source before debugging tools.