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May 22, 2026

MCP now accepts API key auth — no more daily re-logins

Christian Palou
Christian Palou

Co-Founder at TheirStack

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 now accepts a TheirStack API key as a Bearer token on the same endpoint. Create one at app.theirstack.com → API Keys. Keys don't expire until you revoke them, so the connection stays stable.

The MCP docs 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.

Cursor / VS Code / Cline / Windsurf
{
    "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.