- Log in with Rheos (OAuth) — used by chat tools like claude.ai and ChatGPT. You select “Connect”, get bounced to rheos.app to approve, and you’re done. No keys to copy.
- API key — used by local tools like Claude Code, Cursor, and other CLI clients. Generate a key in Settings → MCP, paste it into the client’s config.
Pick whichever your tool supports. Most chat tools use OAuth; most local tools use API keys.
Generate an API key
1
Open MCP settings
2
Create a key
Select Generate new key, give it a label (e.g. “Cursor laptop”), and copy the secret. You’ll only see it once.
3
Store it safely
Treat the key like a password. Anyone with it can act as you in Rheos. Revoke unused keys from the same screen.
Client setup
- claude.ai
- Claude Code
- Cursor
- ChatGPT
- Other clients
Claude.ai uses OAuth — no API key needed.
1
Open Connectors
In claude.ai, select your avatar → Settings → Connectors → Add custom connector.
2
Add Rheos
- Name:
Rheos - URL:
https://mcp.rheos.app
3
Authorize
Claude.ai will redirect you to
rheos.app to sign in and approve. After approval you’ll be bounced back with the connection active.4
Test
Start a new chat and ask: “What Rheos brands do I have?” Claude should call
rheos_list_brands and return your brands.Verifying the connection
Once connected, any of these prompts should produce a tool call:- “List my Rheos brands.” →
rheos_list_brands - “Load the context for my first Rheos brand.” →
rheos_get_context
- The Authorization header is exact —
Bearerprefix included, no trailing whitespace. - The key hasn’t been revoked. Re-check Settings → MCP in the dashboard.
- Your client supports the Streamable HTTP transport (most do as of 2026).

