Slateo MCP Server

From the CLI, add it as a remote HTTP server (-s user makes it available in every project, not just the current one):

claude mcp add --transport http slateo https://app.slateo.io/mcp \
  --header "Authorization: Bearer <api-key>" \
  -s user

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project), then enable it under Settings → MCP:

{
  "mcpServers": {
    "slateo": {
      "url": "https://app.slateo.io/mcp",
      "headers": {
        "Authorization": "Bearer <api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json, or via the Command Palette → MCP: Add Server → HTTP. MCP tools only appear in Copilot Chat's Agent mode, not Ask mode:

{
  "servers": {
    "slateo": {
      "type": "http",
      "url": "https://app.slateo.io/mcp",
      "headers": {
        "Authorization": "Bearer <api-key>"
      }
    }
  }
}

Settings → Connectors → Add custom connector → paste the endpoint, then open Request headers and add Authorization / Bearer <api-key>.

Header-based auth for custom connectors is currently in beta and may not be enabled on every account yet — if you don't see a Request headers section, it isn't available for you yet.

Edit ~/.codeium/windsurf/mcp_config.json — note the field is serverUrl, not url. Fully quit and reopen Windsurf afterward; closing the window alone doesn't reload MCP config:

{
  "mcpServers": {
    "slateo": {
      "serverUrl": "https://app.slateo.io/mcp",
      "headers": {
        "Authorization": "Bearer <api-key>"
      }
    }
  }
}

ChatGPT's custom connectors (Settings → Apps & Connectors → Advanced settings → Developer mode) currently only support OAuth or no auth for remote MCP servers — there's no field for a static API key or bearer token. That means the Slateo MCP server can't be connected through ChatGPT's connector UI today. Use the REST API directly, or a client from this list that supports header-based auth, instead.

Edit ~/.codex/config.toml. Keep the key out of the file by reading it from an environment variable:

[mcp_servers.slateo]
url = "https://app.slateo.io/mcp"
bearer_token_env_var = "SLATEO_API_KEY"

Then export SLATEO_API_KEY=<api-key> in the shell you launch codex from.

Edit ~/.gemini/config/mcp_config.json (global) or .agents/mcp_config.json (workspace) — note the field is serverUrl, not url:

{
  "mcpServers": {
    "slateo": {
      "serverUrl": "https://app.slateo.io/mcp",
      "headers": {
        "Authorization": "Bearer <api-key>"
      }
    }
  }
}

Any client that supports a remote HTTP (or SSE) MCP server with custom headers can connect with:

Clients that only support local stdio servers (a command to launch, no url) can't connect to a remote server like this one directly.