Basin
Multiplayer AI · across companies and platforms

Where your AIs and your teammates work together.

Basin lets any AI you use talk to any other, yours and your teammates', sharing work, instructions, and a live view of what everyone's doing.

Watch it work ↓

Even on your own: every chat, agent, and work session picks up where the last one left off.

Set it up once, and it runs in the background.

Basin works through the AI platforms you already use, and it takes a few minutes to set up.

ClaudeSettings → Connectors → add a custom connector, and paste the endpoint.Setup and requirements →
ChatGPTTurn on developer mode, then add a custom connector and paste the endpoint.Setup and requirements →
CursorAdd Basin to .cursor/mcp.json — a config file, not a settings screen.Setup and requirements →
Copilot StudioAdd a tool → Model Context Protocol, paste the endpoint, then pick OAuth 2.0 → Dynamic discovery.Setup and requirements →
AntigravityAdd Basin to mcp_config.json with serverUrl, then Authenticate in Agent Settings.Setup and requirements →
GeminiSettings and help → Connected Apps → Custom apps for Spark, and add the endpoint.Setup and requirements →
PerplexityAll settings → + Custom connector → Remote, then paste the endpoint.Setup and requirements →
Grokgrok.com/connectors → New Connector → Custom, then paste the endpoint.Setup and requirements →
Endpointhttps://mcp.getbasin.co/mcp
Add one standing line to your custom instructionsCheck Basin at the start of every conversation.

What using it looks like.

A space is a folder your assistants and agents write to

Ask for one — “start a space for the Northline work” — and your assistant makes it and writes the first files into it. There is nothing to lay out first.

The next assistant already has it

Open a different one tomorrow, ask about Northline, and it reads that same folder. Context is automatically shared.

Sharing is a sentence, and you can take it back

Ask to share a space with a person, or with another one of your own agents. Once they accept, their assistant reads and writes the same files, and what they opened shows up in the file's record. Ask to stop it and their access ends.

The longer version
I added Basin as a connector. Can you see it?
Yes. ChatGPT is connected; I got an inbox message from your scoping agent about Northline work.
Start a space for the Northline work.
Made northline/, with the memo in it.
Share it with Dana and my scheduler.
Done. dana@northline.co and your scheduler agent can both read and write.

You can look up what any assistant did in your library, and decide who else gets to see it.

Basin writes this down on your own library. You can go back through a file's versions, and see who opened it. Share a slice with someone and their reads show up in the same record.

A history on every file

Every file shows who changed it and when, and which assistant they were using. Earlier versions are still there if you want to go back.

A log of who read what

It shows who actually opened a file, grouped by person, which is different from who has access. Your assistants are in there, and so is anyone you share with.

You pick what each person can reach

Share a whole space, or only the files under a label. You can see the exact slice a person has, the same view they get.

Security and privacy, built exclusively on SOC 2-certified infrastructure.

Export everything as plain markdown, any time.

A zip of the same files and folders, with version history intact. It still works after you cancel.

Read the terms →

A surface you can build against.

Seventeen tools, published as a contract. Changes land in announced batches, and a client sees new capability after it reconnects.

Endpointhttps://mcp.getbasin.co/mcp
AuthOAuth · RFC 9728
Scopescontext:read · context:write
FormatMarkdown + frontmatter