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The Poix MCP server (https://mcp.poix.io) uses the same authentication as the Poix REST API. Take a look at how authentication works.

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Bearer Token

When connecting to the MCP server, you will need a Token — create one in the Dashboard. Paste it as an Authorization: Bearer header on the MCP connection; every client setup guide in this section shows exactly where that header goes for that client. Here’s the header your MCP client needs to send on every request to https://mcp.poix.io:
For example, testing the connection directly with cURL (the MCP endpoint speaks JSON-RPC over Streamable HTTP):
Always keep your Token safe and reset it if you suspect it has been compromised. You can create, revoke or delete your Token in the Dashboard. Once created, it will be shown only once so keep it safe.

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OAuth

Clients that support native MCP connectors — currently Claude and ChatGPT — can authorize your Poix account with a browser sign-in instead of copying a Token by hand.
  1. In the client, add https://mcp.poix.io as a connector (see Claude Desktop or ChatGPT for the exact steps).
  2. You’re sent to https://app.poix.io to sign in with Google or GitHub.
  3. Review the consent screen — it names the app requesting access and confirms that its requests will be billed to your project balance — and approve it.
The client then receives a token automatically; there’s nothing to copy or paste. If you don’t already have a Poix account, signing in creates one for you, along with a Default project, so you can connect straight from a client with no separate signup step.
A brand-new account starts with no balance, and Poix requires credits for the connection itself, not just for tool calls — a zero-balance account can fail to connect or show no tools at all, without a clear error explaining why. Add credits at app.poix.io/settings/billing right after connecting, before doing anything else with the client.
Each app you approve gets its own token, scoped to your project. You can see every connected app — when it was connected, when it was last used — and revoke access at any time under Connected apps at app.poix.io/mcp. Disconnecting an app immediately revokes its token; your other tokens and connections are unaffected. Which to use: pick OAuth for Claude and ChatGPT connectors — it’s the fastest path and there’s no Token to manage. Pick a Bearer Token for CLI tools, scripts, and any client that doesn’t support browser-based sign-in (see the client setup guides in this section for which each client expects).