Claude.ai
Claude.ai supports adding remote MCP servers as custom connectors. Paste your Overslash MCP URL into the connector setup flow, complete the OAuth consent in the popup, and Overslash tools (overslash_search, overslash_call, …) become available inside Claude.ai conversations.
Add Overslash as a custom connector
On a Pro or Max individual plan:
- Go to Settings → Connectors (also reachable via Customize → Connectors).
- Click + Add custom connector (the "+" next to Connectors).
- Paste your MCP server URL:
https://<your-overslash>/mcp. - (Optional) Expand Advanced settings to supply an OAuth Client ID / Secret — leave these blank to let Overslash register the client dynamically.
- Click Add, then Connect to start the OAuth flow.
On a Team or Enterprise plan, an owner adds it once for the org first: Settings → Connectors → Add → Custom → Web, paste the URL, Add. Members then open Customize → Connectors and click Connect on the listed connector.
What the consent screen asks
The OAuth popup signs you into Overslash and asks you to pick or create an agent for Claude.ai to act as. Overslash requests a single mcp scope. After you confirm, Claude.ai stores the agent's bearer token and the connector goes live.
Verifying the connection
Open a new conversation, click the tools/connectors control, and confirm Overslash's tools (overslash_search, overslash_call, …) appear and are enabled. Asking Claude to run overslash_auth whoami echoes back the agent identity it's acting as.
Limits and known issues
Claude.ai connects from Anthropic's cloud
Custom connectors reach your MCP server from Anthropic's cloud, not from your device — your instance must be reachable over the public internet. A http://localhost:3000/mcp URL will not work; if your server sits behind a firewall, allowlist Anthropic's published IP ranges.
Plan availability: custom connectors are available on Free, Pro, Max, Team, and Enterprise, with Free limited to a single custom connector. The feature is in beta, so exact labels may shift between releases.