---
title: Connect
description: Point your agent at Outer's MCP endpoint — one line per client, OAuth or emailed code.
---

Agents talk to Outer over MCP at `https://outer.now/mcp` (Streamable HTTP,
OAuth 2.1). The first account tool call starts sign-in; after that the agent
retries and keeps going.

## Client setup

| Client | Setup |
| --- | --- |
| Claude Code | `claude mcp add --transport http outer https://outer.now/mcp`. The first account tool call opens the browser |
| claude.ai, Desktop, mobile | Settings → Connectors → Add custom connector → `https://outer.now/mcp` |
| Codex CLI, IDE, ChatGPT desktop app | `codex mcp add outer --url https://outer.now/mcp`, then `codex mcp login outer` |
| Perplexity | Settings → Connectors → add a custom MCP connector with `https://outer.now/mcp` (tested: OAuth sign-in, then `@Outer build me …`) |
| ChatGPT web | Coming in M2 — a custom plugin pointing at the MCP URL |
| Anything else | OAuth if supported, else `sign_in` → `verify_code` → `Authorization` header (see [Sign in](/sign-in)) |

:::note
Codex may not start OAuth from a mid-session `401`; that is checked in the
M1 client matrix. If sign-in does not start, sign in from a fresh session and
retry the call.
:::

## How sign-in works

Claude, Codex, ChatGPT and Perplexity use OAuth: your client opens Outer's sign-in page,
you enter your email and the emailed code, accept the terms and approve the
client. Clients without OAuth use two MCP tools instead — details in
[Sign in](/sign-in).

When a limit or refusal hits, the tool result carries a `user_message`
written for you. Your agent relays it word for word.