---
title: MCP now accepts API key auth — no more daily re-logins
description: Authenticate to TheirStack's MCP with an API key instead of OAuth so the connection never expires and your AI client stops asking you to re-log in.
url: https://theirstack.com/en/product-updates/2026-05-22-mcp-api-key-auth
---

Most MCP clients today don't refresh OAuth tokens transparently, so you end up re-logging in every day. Annoying when you're in the middle of a conversation with Claude or Cursor.

Our [MCP server](/en/docs/mcp) now accepts a TheirStack [API key](/en/docs/api-reference/authentication) as a Bearer token on the same endpoint. Create one at [app.theirstack.com → API Keys](https://app.theirstack.com/settings/api-key). Keys don't expire until you revoke them, so the connection stays stable.

The [MCP docs](/en/docs/mcp) now show both options side-by-side inside every client tab — Claude Code, Claude.ai, Cursor, VS Code, ChatGPT, Windsurf, Cline, Codex, Gemini CLI. Pick OAuth or API key per agent; your choice is remembered across tabs.

```
{
    "mcpServers": {
        "theirstack": {
            "url": "https://api.theirstack.com/mcp",
            "headers": { "Authorization": "Bearer <YOUR_API_KEY>" }
        }
    }
}
```

OAuth still works — it's just no longer your only option.