Secure auth for MCP servers

Add OAuth to your MCP server

An MCP server that talks to real data needs to know who is asking. Paycux gives you the authorization endpoints, token issuance, refresh and revocation, so your server only has to validate a token.

The flow is the standard one. Clients discover your metadata, redirect the user, and exchange a code for a token — nothing bespoke for an agent to learn.

• Authorization server metadata served for you
• Short-lived access tokens with refresh
• Per-client scopes, revocable individually

Bring your own users

If your users already sign in through Paycux, MCP clients authenticate against the same identity. There is no second user table and no second password.

If they sign in somewhere else, connect that provider once and MCP inherits it.

What an agent gets

A token bound to one user, one client and one scope set, with a lifetime measured in minutes. Every call it makes is attributable to a person, which is what makes an audit trail meaningful.

Revocation is immediate and per client, so pulling one agent's access does not sign everyone else out.