MAXX can answer questions about your store from inside Claude, ChatGPT, Codex or a Slack channel. Add it once, sign in with your PDQ login, and ask away from wherever you already work.
You don't need an API key or token for any of this. Every tool asks you to sign in with your PDQ user after you add MAXX.
The MAXX server URL
Claude, ChatGPT and Codex all ask for the same URL. Copy it before you start:
Connect MAXX to Claude (just you)
Step 1: Add a custom connector
In Claude, go to Customize > Connectors. Click Add, then Add custom connector. Name it PDQ MAXX, paste the MAXX server URL and click Continue.
Step 2: Sign in with PDQ
Click Connect and log in with your PDQ user. MAXX now shows up in your Claude chats.
Connect MAXX to Claude for your whole team
This one is for Claude Team and Enterprise owners. You add MAXX once and everyone in your organization can use it.
Step 1: Add the connector
Go to Organization settings > Connectors. Click Add > Custom > Web, enter PDQ MAXX and the MAXX server URL, then click Continue.
Step 2: Pick the sign-in options
Set Authentication to Sign in now and OAuth client to Register automatically. Don't keep the option Claude marks as "Recommended". MAXX doesn't support it and the connection will fail.
Step 3: Each teammate connects
Everyone on the team goes to Customize > Connectors > PDQ MAXX, clicks Connect and logs in with their own PDQ user.
Connect MAXX to ChatGPT
Step 1: Add a custom MCP server
On chatgpt.com or in the ChatGPT app, go to Plugins. Click Add, then Add custom MCP server. Name it PDQ MAXX and paste the MAXX server URL as the Server URL.
Step 2: Create the plugin and sign in
Leave Authentication on OAuth. Tick I understand and want to continue, click Create as a plugin, then Continue and log in with your PDQ user.
The plugin lands in your Personal tab, so only you can use it. On a ChatGPT Business workspace, an admin or owner can publish it for the whole team.
Connect MAXX to Codex
How you add MAXX depends on which Codex you use. Codex settings are per user and separate from your ChatGPT plugins, so you'll need to add MAXX here even if it's already in ChatGPT.
Codex Mac app (inside the ChatGPT app)
Follow the ChatGPT steps above. The flow is the same.
Codex with an MCPs tab
Go to Plugins > MCPs, click Add, then Connect to a custom MCP. Set Type to Streamable HTTP and paste the MAXX server URL. Leave Bearer token env var, Headers and Headers from environment variables empty. Click Save and log in with your PDQ user.
Codex CLI
Run this in your terminal. It opens the PDQ login in your browser:
codex mcp add pdq-maxx --url https://maxx-external-mcp-server.pdqprod.link/mcp
If you ever need to sign in again, run codex mcp login pdq-maxx.
Connect a Slack channel to MAXX
Step 1: Add MAXX to the channel
In Slack, open the channel's member list and click Add people or agents. Search for MAXX and add it. You can also type /invite @MAXX in the channel.
Step 2: Copy the channel ID
Open the channel details and go to About. Copy the Channel ID at the bottom.
Step 3: Connect it in PDQ
In PDQ, go to Settings > MAXX > Slack and click Connect Slack. Paste the Channel ID, click Check and confirm the channel. MAXX posts a hello message so you know it worked.
Good to know
In Slack, MAXX only answers when you tag @MAXX. You can change that per channel in Settings > MAXX > Slack.
Your MAXX settings follow you everywhere. Change something in Settings > MAXX and Claude, ChatGPT, Codex and Slack pick it up on your next message.
MAXX can prepare setup changes as drafts for you to review. It never publishes a change on its own.
That's it! Happy asking! If you get stuck, reach out to support@prettydamnquick.com.