White-labeling authentication

There are three places where Composio branding shows up during authentication:

Customizing the Connect Link

The Connect Link is the hosted page your users see when connecting their accounts. By default it shows Composio branding.

To replace it with your own branding:

1. Go to Project Settings → Auth Screen
2. Upload your Logo and set your App Title

This applies to all Connect Link flows across all toolkits, for both in-chat and manual authentication. Each project has one logo and app title, so if you need different branding per product, use separate projects.

Using your own OAuth apps

OAuth toolkits like Google and GitHub show a consent screen that says which app is requesting access. By default this reads "Composio wants to connect to your account." To show your app name instead, register your own OAuth app and tell Composio to use it. This is done by creating a custom auth config with your own credentials. See when to use your own OAuth apps.

https://backend.composio.dev/api/v3/toolkits/auth/callback

session = composio.create(
    user_id="user_123",
    auth_configs={
        "github": "ac_your_github_config",
        "slack": "ac_your_slack_config",
        # gmail, linear, etc. use Composio managed auth automatically
    },
)

const session = await composio.create("user_123", {
  authConfigs: {
    github: "ac_your_github_config",
    slack: "ac_your_slack_config",
    // gmail, linear, etc. use Composio managed auth automatically
  },
});

When to use your own OAuth apps

• Production apps where end users see consent screens. They should see your brand, not Composio's.
• Enterprise customers who require your branding end-to-end.
• Toolkits where you need custom scopes beyond what Composio's default app provides.

For development and testing, Composio's managed auth works fine. No OAuth app setup required.

Custom redirect domain

During OAuth, the browser briefly redirects through backend.composio.dev so Composio can capture the auth token. Some toolkits also display this URL on the consent screen.

If you need to hide Composio's domain, you can proxy the redirect through your own domain instead.

Set the redirect URI to your domain

In your OAuth app's settings, set the authorized redirect URI to your own endpoint:

https://yourdomain.com/api/composio-redirect

Create a proxy endpoint

This endpoint receives the OAuth callback and immediately 302-redirects it to Composio:

PythonTypeScript

from fastapi import FastAPI, Request
from fastapi.responses import RedirectResponse

app = FastAPI()

@app.get("/api/composio-redirect")
def composio_redirect(request: Request):
    composio_url = "https://backend.composio.dev/api/v3/toolkits/auth/callback"
    return RedirectResponse(url=f"{composio_url}?{request.url.query}")

// pages/api/composio-redirect.ts (Next.js)
import type { NextApiRequest, NextApiResponse } from "next";

export default function handler(req: NextApiRequest, res: NextApiResponse) {
  const composioUrl = "https://backend.composio.dev/api/v3/toolkits/auth/callback";
  const params = new URLSearchParams(req.query as Record<string, string>);
  res.redirect(302, `${composioUrl}?${params.toString()}`);
}

Your endpoint must return a 302 redirect. Do not follow the redirect server-side or make a fetch call to Composio. The user's browser needs to be redirected so the OAuth flow completes correctly.

Update your auth config

In the Composio dashboard, update your auth config to use your custom redirect URI.

Here's how the redirect flow works. Your proxy just forwards the browser redirect to Composio. It never touches the authorization code or token.

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