A simple setup guide for anyone juggling multiple Gmail inboxes or Slack workspaces. This gives Claude one place to search them all. No terminal. No code. No sweat.
Search personal-gmail, work-gmail, agency-slack, and client-a-slack for the renewal thread. Label every source.
The renewal appears to be waiting on finance approval. Most recent source is client-a-slack, then work-gmail.
Open Claude settings, go to Connectors, choose Add custom connector, and paste this URL. Name it "Multi Connector". If Composio asks you to sign in or create a free account, do it.
https://connect.composio.dev/mcp
Claude should open browser approval links through Composio. Sign in with the account you want to connect, review the permissions, and approve only what you understand.
Use Composio to connect my Gmail and Slack accounts. Start with read/search use cases only.
If Claude says Gmail and Slack are already connected, that only means one of each is active. Ask for a fresh connection link for the next Gmail account or the next Slack workspace.
Using only Composio, help me add another Gmail account and another Slack workspace. Generate fresh OAuth connection links for each one. Do not reuse the Gmail or Slack connection that is already active.
Most Gmail addresses and Slack workspace names are already useful. Add simple labels only when you want a more natural way to refer to them, like personal email, main work email, or client Slack.
Using only Composio, list my connected Gmail accounts and Slack workspaces. Keep the existing email addresses and workspace names, but help me add friendly labels for any that are ambiguous, like personal email or client Slack.
This tells Claude how to behave in the current chat. For a reusable setup, paste it into a Claude Project's instructions or your profile instructions too. Connector tool permissions are still the real backstop.
When using Gmail or Slack, always label every result with the account or workspace alias. If the account is unclear, ask me before searching. Do not send emails, post Slack messages, delete, archive, or modify anything unless I explicitly confirm the exact action and destination.
Search all connected Gmail accounts and Slack workspaces for “[topic/person/company]”. Return the most relevant results grouped by source. For each result, show the email address or Slack workspace, date, sender, and why it matters.
Check my connected business Gmail accounts and Slack workspaces from the last 24 hours. Summarize only items that likely need my attention. Group by: urgent, waiting on me, useful context, and can ignore.
I have a call about [client/project] in 20 minutes. Search connected Gmail and Slack sources for recent context. Give me a briefing with: latest decision, unresolved questions, people involved, and links or identifiers for the source messages.
Search across connected Gmail and Slack for [topic]. Tell me which source appears most current and authoritative. Separate confirmed facts from guesses. If Gmail and Slack disagree, show the conflict clearly.
Search my personal Gmail and business Gmail separately for “[topic]”. Keep the results in two sections. Do not mix personal and business context unless the same person or thread appears in both.
Based on the latest Gmail and Slack context about [topic], draft a reply I could send from [email account]. Do not send it. Include the source messages you used so I can verify the draft.
Ask Claude to list the connected Gmail and Slack accounts it can see through Composio. If the second account is missing, connect it again and rename it with a clear alias.
Ask Claude to retry the connection. Composio approval links can expire, so a fresh link is usually enough.
Some Slack workspaces require an owner or admin to approve app installs. That is a workspace policy, not a Claude issue.
Disconnect the connector in Claude settings and remove the connected account from Composio. You can also revoke Google and Slack app access from their own security settings.
No. If you paste it into one chat, it guides that chat. For persistence, add it to a Claude Project's instructions or profile instructions. For real enforcement, keep risky connector tools set to needs approval or disabled.
Know someone juggling multiple Gmail inboxes or Slack workspaces? Send them this setup guide so Claude can search across the accounts they actually use.