---
title: "Claude Desktop"
description: "Connect with OAuth via Add custom connector — approve in the browser. API-key bridge as fallback."
url: https://www.unitpost.com/guides/mcp/claude-desktop
section: MCP
updated: 2026-08-28
---
# Claude Desktop

## Connection settings

- **Server URL**: https://mcp.unitpost.com/mcp
- **Transport**: Streamable HTTP
- **Auth (recommended)**: OAuth 2.1 — add the URL, approve in the browser (scopes match API capabilities; tokens refresh automatically)
- **Auth (legacy)**: Authorization: Bearer pk_live_YOUR_KEY (workspace API key from Settings → API keys; for clients that can only paste a key)
- **Tools**: one per API operation (email_send, email_campaigns_send, …)

## Claude Desktop

> Connect with OAuth via Add custom connector — approve in the browser. API-key bridge as fallback.

Claude Desktop connects with OAuth: add the server URL, approve in the browser, done. No browser or older plan? The headless guide has the mcp-remote bridge config.

### 1. Add a custom connector (recommended)

In Claude Desktop: Settings → Connectors → Add custom connector. Paste the server URL below as the Remote MCP server URL and complete the browser approval. No key to copy. Your client opens Unitpost in the browser — pick a workspace, approve the scopes, and you're connected. Tokens refresh automatically.

- Remote MCP server URL: https://mcp.unitpost.com/mcp

### 2. Verify

The unitpost connector should show as connected with its tools available in chat.

> Don't see it? Fully quit and reopen the client — closing the window is often not enough — then check again.

### 3. Send a test

Ask Claude to send an email from a verified domain and confirm it in Unitpost Activity.

## Related

- [Codex](https://www.unitpost.com/guides/mcp/codex): Connect ChatGPT/Codex with OAuth in the browser. Codex CLI takes a static key instead.
- [GitHub Copilot](https://www.unitpost.com/guides/mcp/copilot): Connect VS Code agent mode to Unitpost with OAuth — approve in the browser. API key as fallback.
- [Gemini CLI](https://www.unitpost.com/guides/mcp/gemini): Connect the Gemini CLI to Unitpost — OAuth in the browser, or a key block.