Trillion gives your AI a set of questions to walk through, in order, before it recommends a choice. On a paid plan every run is saved to your account, and you can read or share it as a document. On the free plan nothing is kept.
Copy everything below and paste it into the AI you use. It sets Trillion up itself where it can, or walks you through each click, one step at a time.
Help me connect Trillion to the AI app where we are having this conversation. First identify this app; if you cannot, ask me which app it is. Use Trillion's MCP server at https://app.gettrillion.ai/mcp. If you can configure this app's MCP connection or run its CLI, do that here with OAuth. If you cannot, guide me through this app's actual settings one click at a time. Do not set up a different app. Keep the sign-in attempt running while I authorize it. If it times out, start a fresh login and use its new Trillion sign-in link. I can sign in with my email and password, a passkey, or choose 'Email me a code'. Never ask me for a password, API key, or a 127.0.0.1 callback link. When connected, list Trillion's tools in this app to verify it worked, and tell me I now work with Trillion right here, and anywhere else I use this AI, such as Slack with other people.
Connect Trillion to Grok with a custom connector. Grok Business and Enterprise accounts need an admin to add it first.
1. Open Grok Connectors. Sign in to Grok and open Connectors.
Open Grok Connectors: https://grok.com/connectors
2. Add a custom connector. Choose New Connector, then Custom. On Grok Business or Enterprise, ask your admin to add an Other connector under Grok Business, Connectors in console.x.ai first.
If not: If New Connector is unavailable in a Business or Enterprise workspace, the workspace admin must add it first.
3. Paste Trillion's address. Name the connector Trillion and paste this server address:
https://app.gettrillion.ai/mcp
4. Sign in on Trillion's page. Save the connector, then choose Connect or Authenticate when Grok offers it. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Grok. No password yet? Choose Email me a code and type the code we email you.
When it worked: Trillion appears as a connected connector in Grok.
If not: If the Trillion page says your app took too long, or it closed before you finished: go back to Grok Connectors and connect Trillion again. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
5. Check it is connected. Open Grok Connectors.
When it worked: Trillion is listed as connected.
6. Let Trillion run without asking. If Grok asks before a Trillion tool runs, choose to always allow it, so it stops asking each time.
7. Connect it in every account you use. Use Grok with more than one account, such as a personal one and a work one? Each account keeps its own connectors, so sign in to each one in turn and do these steps again, signing in to the same Trillion every time.
Connect another Grok account: https://grok.com/connectors
8. Ask for something. Ask Grok to use Trillion, for example:
Use Trillion to help me decide what to focus on this week.
For claude.ai and the Claude desktop app, on any plan (the Free plan allows one custom connector). Each claude.ai account keeps its own list of connectors, so a second Claude account adds Trillion once too and signs in with the same passkey, reaching the same Trillion. Claude Code keeps its own list on each computer instead (see the Claude Code tab).
1. Open your Connectors. Sign in to claude.ai, or open the Claude desktop app. In the left sidebar click Customize, then Connectors. The button below opens that page.
Open Claude connectors: https://claude.ai/settings/connectors
If not: On a Team or Enterprise plan only the owner can add connectors. Ask them to add Trillion in Organization settings, Connectors, Add, Custom, Web, with the address in step 3. Then you open Customize, Connectors and click Connect next to Trillion, and skip to step 5.
2. Click + and then Add custom connector. The + is at the top of the Connectors list. A window called Add custom connector opens.
3. Type the name and paste the address. In the name box type Trillion. Copy the address below and paste it in the URL box. Then click the button at the bottom right to go on.
https://app.gettrillion.ai/mcp
If not: If Claude says the address is not valid, check that it starts with https:// and ends with /mcp, with no space before or after.
4. Click Add. The next part of the window shows Claude's sign-in choices. Claude has already picked the right ones for Trillion, so do not change anything. Scroll down and click Add.
Leave as it is: Authentication: Sign in now (Detected). OAuth client: Use Claude's published identity (Detected). Request headers: none. Advanced, Transport: Streamable HTTP.
When it worked: Trillion in your Connectors list.
5. Sign in on Trillion's page. Next to Trillion click Connect. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Claude. No password yet? Choose Email me a code and type the code we email you.
When it worked: The page closes by itself and Trillion shows as connected.
If not: If the Trillion page says your app took too long, or it closed before you finished: click Connect next to Trillion in Customize, Connectors again. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
6. Check it is connected. In Customize, Connectors, look at Trillion.
When it worked: Trillion shows as connected.
7. Let Trillion run without asking. Still in Customize, Connectors, click Trillion. Under Tool permissions, set Interactive tools, Read-only tools and Write/delete tools each to Always allow. Claude then uses Trillion without stopping to ask you each time.
Open Claude connectors: https://claude.ai/customize/connectors
When it worked: Always allow next to Interactive tools, Read-only tools and Write/delete tools.
If not: If Claude still asks before a Trillion tool, click Always allow on that prompt; it stays that way for that tool. A Team or Enterprise owner can stop Always allow for everyone; then ask them to allow it.
8. Connect it in every account you use. Have more than one Claude account, such as a personal one and a work one? Each keeps its own connectors. Sign in to the other account at claude.ai, press the button below and do these steps again there, signing in to the same Trillion every time.
Connect another Claude account: https://claude.ai/settings/connectors
9. Ask for something. Start a new chat. Click the + at the bottom left of the message box, choose Connectors and switch Trillion on. Then ask for what you want, for example:
Use Trillion to help me decide what to focus on this week.
If not: If Claude answers without using Trillion, write "Use Trillion" at the start of your message.
For ChatGPT in a web browser at chatgpt.com, on the Plus, Pro, Business, Enterprise and Education plans. Set it up in the browser; the phone app cannot add it.
1. Turn on Developer mode. Sign in at chatgpt.com. Click your name at the bottom left, then Settings, then Security and login. Switch on Developer mode.
When it worked: The switch is on. ChatGPT may draw an orange border round the window while Developer mode is on; that is normal.
If not: No Developer mode switch? On a Business or Enterprise workspace an admin must allow it first, in Workspace settings, Permissions & roles. On the Free plan it is not offered.
2. Open Plugins and click +. Go to ChatGPT's Plugins page (the button below opens it) and click the + button. A window called New Plugin opens.
Open ChatGPT Plugins: https://chatgpt.com/plugins
If not: If there is no + button, Developer mode is still off: do step 1 again and reload the page.
3. Type the name and paste the address. In Name type Trillion. Under Connection, keep Server URL selected and paste the address below in the box under it.
https://app.gettrillion.ai/mcp
Leave as it is: Icon and Description (both optional).
4. Keep OAuth, tick the box, click Create. Tick "I understand and want to continue", then click Create.
Leave as it is: Authentication: OAuth. Advanced OAuth settings: do not open it; ChatGPT finds Trillion's settings itself.
If not: If Create stays grey, the address box is empty or the box is not ticked.
5. Sign in on Trillion's page. ChatGPT opens a Trillion page by itself after Create. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow ChatGPT. No password yet? Choose Email me a code and type the code we email you.
When it worked: The page closes by itself.
If not: If the Trillion page says your app took too long, or it closed before you finished: open Plugins, click Trillion and connect it again. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
6. Check it is connected. Open ChatGPT's Plugins page.
When it worked: Trillion in your plugins, with its list of tools.
7. Let Trillion run without asking. When ChatGPT asks before a Trillion tool that changes something, choose to remember your answer: it stops asking for the rest of that chat. ChatGPT does not offer a setting that keeps it for every chat.
8. Connect it in every account you use. Use ChatGPT with more than one account, such as a personal one and a work one? Each account keeps its own connectors, so sign in to each one in turn and do these steps again, signing in to the same Trillion every time.
Connect another ChatGPT account: https://chatgpt.com/plugins
9. Ask for something. Start a new chat. Click the + by the message box, choose Developer mode and pick Trillion. Then ask for what you want, for example:
Use Trillion to help me decide whether to launch this week or next.
For Muse (Meta's AI) and any AI that has no settings screen for this: you connect it by sending it a message. It runs on its own computer in the cloud, so it only ever uses Trillion's web address. Do this once for each account you use it with.
1. Paste this message into Muse. Open a chat with Muse, paste the message below and send it.
Connect Trillion to yourself with your own "Add a custom connector" sheet, using OAuth. Do not give me a link to open in a browser, do not use a 127.0.0.1 address, and do not ask me for a key. Use exactly these values: name custom.trillion; domain app.gettrillion.ai; authorization_url https://app.gettrillion.ai/authorize; token_url https://app.gettrillion.ai/oauth/token; client_id muse; redirect_uri https://agent.meta.ai/api/hatch/oauth/callback; token_endpoint_auth_method none; scope decisions. Trillion's MCP server is https://app.gettrillion.ai/mcp. Then send me the Add a custom connector link.
If not: If Muse replies with a link to open in Safari, a 127.0.0.1 address, or asks for a key or a client id, paste the message again and add: Use the Add a custom connector sheet with client_id muse.
2. Sign in on Trillion's page. Muse answers with a blue link called Add a custom connector. Tap it: a Meta sheet names Trillion and app.gettrillion.ai. Tap Connect. Every box on the sheet is already filled in: if it shows a Client ID box, it says muse. Stay in the sheet; do not open any link from it in Safari. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Muse. No password yet? Choose Email me a code and type the code we email you.
When it worked: You are back in the chat and Muse says Trillion is connected.
If not: If the Trillion page says your app took too long, or it closed before you finished: tap the Add a custom connector link again, or if the Client ID box was empty, tell Muse: Put client_id muse in the connector and send the link again. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
3. Check it is connected. Send Muse this message.
List your Trillion tools.
When it worked: Muse lists Trillion's tools, such as decisions, files and people.
4. Let Trillion run without asking. If Muse asks before a Trillion tool runs, choose to always allow it, so it stops asking each time.
5. Connect it in every account you use. Use Muse with more than one account, such as a personal one and a work one? Each account keeps its own connectors, so sign in to each one in turn and do these steps again, signing in to the same Trillion every time.
6. Ask for something. Ask in plain words, for example:
Use Trillion to help me decide what to focus on this week.
For Claude Code in your terminal. Claude Code keeps its own list on each computer, separate from your claude.ai account: do this once on each computer you use, and it covers every Claude account you use there, including several accounts a local proxy such as CLIProxyAPI switches between.
1. Open Terminal. On a Mac press Command and Space, type Terminal and press Return. On Windows open PowerShell.
2. Paste this line and press Return. It adds Trillion for every folder on this computer.
claude mcp add --transport http --scope user trillion https://app.gettrillion.ai/mcp && claude mcp login trillion
If not: "command not found: claude" means Claude Code is not installed on this computer. Install it from claude.com/claude-code, then paste the line again.
3. Sign in on Trillion's page. The line you pasted opens a Trillion page in your browser. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Claude Code. No password yet? Choose Email me a code and type the code we email you.
When it worked: Terminal says the sign-in worked.
If not: If the Trillion page says your app took too long, or it closed before you finished: paste claude mcp login trillion and press Return, or in Claude Code type /mcp, choose trillion and choose Authenticate. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
4. Check it is connected. Paste this and press Return.
claude mcp list
When it worked: A line that starts with trillion and says Connected.
5. Let Trillion run without asking. Open the file ~/.claude/settings.json and add "mcp__trillion" to the list under permissions, allow, as below. Claude Code then uses every Trillion tool without asking you each time.
{ "permissions": { "allow": ["mcp__trillion"] } }
Leave as it is: Everything else already in the file: add the line to the allow list that is there, or add the permissions part if there is none.
6. Connect it in every account you use. Claude Code keeps Trillion on each computer, not in your Claude account: do this once on every computer you use Claude Code on. It then works for every Claude account you use there.
7. Ask for something. Start Claude Code by typing claude, then ask in plain words, for example:
Use Trillion to help me decide which bug to fix first.
For Codex in an editor, the Codex app or Terminal. They read the same server list on this computer, so add Trillion once per computer.
1. Use Codex or open Terminal. If you use Codex inside an editor, ask it to run the command below on this computer. Otherwise, on a Mac press Command and Space, type Terminal and press Return; on Windows open PowerShell.
2. Add Trillion to Codex. Ask Codex to run this line, or paste it in Terminal and press Return. It adds the server and starts sign-in. Keep that command running while you finish in the browser.
codex mcp add trillion --url https://app.gettrillion.ai/mcp
If not: "command not found: codex" means Codex is not installed on this computer. Install it from developers.openai.com/codex, then paste the line again.
3. Sign in on Trillion's page. Codex may open a Trillion page or print a Trillion authorization URL. If it prints the URL, open that HTTPS Trillion page while the command is still running. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Codex. No password yet? Choose Email me a code and type the code we email you.
When it worked: Codex says "Successfully logged in".
If not: If the Trillion page says your app took too long, or it closed before you finished: run codex mcp login trillion and open the NEW Trillion authorization URL it prints while that command is running. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
4. Check it is connected. Paste this and press Return.
codex mcp list
When it worked: A row for trillion with its address.
5. Let Trillion run without asking. Open the file ~/.codex/config.toml, find the part that starts with [mcp_servers.trillion] and add the line below under it. Codex then uses every Trillion tool without asking you each time.
default_tools_approval_mode = "approve"
6. Connect it in every account you use. Codex keeps Trillion on each computer: do this once on every computer you use Codex on. It then works for every account you use Codex with there.
7. Ask for something. Start Codex by typing codex, then ask in plain words, for example:
Use Trillion to find a tool that transcribes my recording, then run it.
For the Gemini app at gemini.google.com, with a personal Google Account, for people 18 or over in the US, in English. Add it in the web app; it then works in the Gemini phone app too. Work and school Google Accounts cannot add it.
1. Open Connected Apps. Sign in at gemini.google.com. At the bottom left click Settings, then Connected Apps.
Open Gemini: https://gemini.google.com/
If not: No Connected Apps there? Click Personal Intelligence first, then Connected Apps. Custom apps are hidden while Keep Activity is off, so switch Keep Activity on.
2. Add a custom app. Under Custom apps click Add a custom app, paste the address below and click Next.
https://app.gettrillion.ai/mcp
Leave as it is: Advanced features: do not open it; Gemini finds Trillion's sign-in settings itself.
3. Sign in on Trillion's page. Follow Gemini's on-screen steps until a Trillion page opens. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Gemini. No password yet? Choose Email me a code and type the code we email you.
When it worked: Trillion listed under Custom apps, switched on.
If not: If the Trillion page says your app took too long, or it closed before you finished: go back to Settings, Connected Apps and add Trillion again. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
4. Check it is connected. Open Settings, Connected Apps.
When it worked: Trillion listed under Custom apps, switched on.
5. Let Trillion run without asking. If Gemini asks before a Trillion tool runs, choose to always allow it, so it stops asking each time.
6. Connect it in every account you use. Use Gemini with more than one account, such as a personal one and a work one? Each account keeps its own connectors, so sign in to each one in turn and do these steps again, signing in to the same Trillion every time.
Connect another Google account: https://gemini.google.com/
7. Ask for something. In a chat, type @ and pick Trillion, then ask for what you want, for example:
@Trillion help me decide whether to launch this week or next.
If not: To turn it off later: Settings, Connected Apps, then switch Trillion off under Custom apps, or More details, Disconnect.
For Gemini in your terminal (the Gemini CLI). For the Gemini app in a browser, use the Gemini tile.
1. Add Trillion. In Terminal, paste this line and press Return. It adds Trillion as a remote server.
gemini mcp add --transport http trillion https://app.gettrillion.ai/mcp
2. Sign in on Trillion's page. Gemini opens a Trillion page in your browser when it first needs you to sign in. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Gemini. No password yet? Choose Email me a code and type the code we email you.
When it worked: Gemini says Trillion is authenticated.
If not: If the Trillion page says your app took too long, or it closed before you finished: in a Gemini CLI session type /mcp auth trillion. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
3. Check it is connected. Paste this and press Return.
gemini mcp list
When it worked: Trillion appears in the list of connected MCP servers.
If not: In a Gemini CLI session, type /mcp list to see the connection.
4. Let Trillion run without asking. Open the file ~/.gemini/settings.json, find trillion under mcpServers and add the line below inside it. Gemini then uses every Trillion tool without asking you each time.
"trust": true
Leave as it is: Everything else already in the file.
If not: Adding Trillion with gemini mcp add --trust does the same.
5. Connect it in every account you use. The Gemini CLI keeps Trillion on each computer: do this once on every computer you use it on. It then works for every Google account you sign in with there.
6. Ask for something. Start Gemini by typing gemini, then ask in plain words, for example:
Use Trillion to help me decide what to focus on this week.
For the Cursor editor. Do it once on each computer you use.
1. Click Add to Cursor. Cursor opens and asks whether to install trillion. Confirm it.
When it worked: trillion in Cursor Settings, in the MCP section.
If not: If nothing opened, do the next step instead.
2. Only if nothing opened: add it by hand. Open Cursor Settings (Command and comma), go to the MCP section and add a new MCP server. Cursor opens a file called mcp.json. Replace what is in it with the lines below and save with Command and S.
{ "mcpServers": { "trillion": { "url": "https://app.gettrillion.ai/mcp" } } }
3. Sign in on Trillion's page. In Cursor Settings, MCP section, click Connect next to trillion. Your browser opens a Trillion page. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow Cursor. No password yet? Choose Email me a code and type the code we email you.
When it worked: A green dot next to trillion and a list of its tools.
If not: If the Trillion page says your app took too long, or it closed before you finished: quit Cursor completely (Command and Q), open it again and click Connect next to trillion once more. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
4. Check it is connected. Open Cursor Settings, MCP section.
When it worked: A green dot next to trillion and a list of its tools.
5. Let Trillion run without asking. The first time Cursor asks before a Trillion tool runs, choose Add to allowlist. Or open Cursor Settings, Agents, Approvals & Execution and add Trillion's tools to the MCP allowlist there. Cursor then runs them without asking you each time.
6. Connect it in every account you use. Cursor keeps Trillion on each computer: do this once on every computer you use Cursor on.
7. Ask for something. Open Cursor's chat and ask in plain words, for example:
Use Trillion to help me decide how to split this feature into releases.
Any app that can add an MCP server or a connector.
1. Find where your app adds an MCP server. Look for Connectors, Integrations, Plugins, Tools or MCP in its settings.
2. Paste this address. Most apps ask only for this address. If the app asks how to sign in, choose OAuth. If it asks for a client id, leave it empty so it registers itself; there is nothing to type.
https://app.gettrillion.ai/mcp
3. Only if the app cannot sign in and asks for an API key. Some older apps and scripts cannot sign in. Only for those: make a personal key in Account & security, copy it once, and paste it where the app asks for a key. An app that can sign in never needs one.
Authorization: Bearer <your personal key>
4. Sign in on Trillion's page. Your app opens a Trillion page when it signs in. On the Trillion page, sign in with your email and password, or choose Sign in with a passkey, then allow your app. No password yet? Choose Email me a code and type the code we email you.
When it worked: Your app lists Trillion's tools.
If not: If the Trillion page says your app took too long, or it closed before you finished: start the sign-in again from your app's server or connector settings. No Trillion account yet? Choose Create your Trillion account under New here? on that page.
5. Check it is connected. Open your app's list of servers or connectors.
When it worked: Trillion is there with its tools.
6. Let Trillion run without asking. If your app asks before a Trillion tool runs, choose to always allow it, so it stops asking each time.
7. Connect it in every account you use. Use your app with more than one account, such as a personal one and a work one? Each account keeps its own connectors, so sign in to each one in turn and do these steps again, signing in to the same Trillion every time.
8. Ask for something. Ask your app in plain words, for example:
Use Trillion to help me decide what to focus on this week.
Use Trillion to decide what to cook tonight. I have 25 minutes and some leftover rice.
Use Trillion to decide whether to fix the checkout bug or ship the new pricing page first, then export the decision.
Show me my earlier Trillion decisions that look like this one, and how they turned out.
Tell Trillion that last week's dinner decision worked: it took 18 minutes.
One general method plus versions for cooking, relationships, software and tennis.
Opens a decision with your options and evidence, answers each question in order, and records the choice with its reason and next step.
Saves notes to a decision at any time.
On the paid plan, shows your earlier decisions like this one and, if others share theirs, how people decided in similar situations.
Saves what happened afterwards, in your words.
Returns the whole run as a readable document or as data.
The free plan gives a set number of decisions each month and keeps none of them. A paid plan keeps every decision and what you are working toward, and lets your AI read your past decisions and show similar ones.
Write to hello@gettrillion.ai.