--- title: "Connect Bread & Butter to OnceOnly - APIANT.ai" description: "When \"New Authentication\" fires in Bread & Butter, your agent runs \"Add event\" in OnceOnly." canonical: "https://apiant.ai/connect/bread-butter-to-onceonly" --- # Connect Bread & Butter to OnceOnly When **New Authentication** fires in [Bread & Butter](https://apiant.ai/connections/bread-butter), your agent runs **Add event** in [OnceOnly](https://apiant.ai/connections/onceonly). Describe the whole flow and it is built, tested on every scenario and kept running. Bread & Butter **6** triggers Bread & Butter **24** actions OnceOnly **11** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Bread & Butter and OnceOnly to do together? Give your AI client this address. `https://mcp.apiant.ai` One connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser. ### Set it up in your client ### Claude Code Run this in the directory you want to work in. `claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai` Start Claude Code there, approve the server, and sign in in the browser page it opens. [Claude Code guide (opens in a new tab)](https://apiant.ai/docs/mcp/claude-code) ### Claude, web and desktop Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Cursor Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Zed Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Codex and the ChatGPT desktop app Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Any other MCP client Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) Example flows ## What Bread & Butter can start in OnceOnly - When **New Authentication** in Bread & Butter then **Add event** in OnceOnly - When **New Contact Us Submission** in Bread & Butter then **Add policy** in OnceOnly Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships. Everything your agent can do with Bread & Butter and OnceOnly ## Triggers and actions 6 triggers · 35 actions - Trigger **New Authentication** Triggers every time a user signs in. - Trigger **New Contact Us Submission** Triggers when a user submits the Contact Us tool. - Trigger **New Custom Fields** Triggers when a user submits the Custom Fields for Registration. - Trigger **New Custom User Event** Triggers when a user subscribes to custom events, selected in the triggers section below. - Trigger **New Email Captured** Triggers when a user enters their email address, or signs in with SSO for the first time. - Trigger **New Profile Verified** Triggers when a user signs in for the first time. - Action **Add contact us submission** Records a Contact Us submission from a visitor's device in a Bread & Butter app. - Action **Add event** Records an event (such as a page view or custom event code) for a device in a Bread & Butter app. - Action **Add form submission** Records a form submission from a visitor's device in a Bread & Butter app, capturing their email, name and any extra form fields. - Action **Add lead list** Creates a lead list in a Bread & Butter app from a set of leads, returning the new list with its lead count and credit quote. - Action **Add tag** Creates a new tag in a Bread & Butter app. - Action **Add user custom values** Saves custom field values (key/value pairs) for a visitor in a Bread & Butter app. - Action **Create custom event definition** Creates a custom event definition in a Bread & Butter app, which users can then trigger and which can be subscribed to. - Action **Create webhook** Subscribes a webhook URL to a Bread & Butter event so Bread & Butter posts each new occurrence to it. Returns the id of the new subscription. - Action **Delete tag** Deletes a tag from a Bread & Butter app. - Action **Get credit balance** Returns the credit balance for a Bread & Butter app, including credits used this period, the monthly allowance and pending enrichments. - Action **Get device profile** Returns the sign-in options and the visitor's profile state for one registered device. - Action **Get lead list** Returns a Bread & Butter lead list by its ID, including its processing status, lead counts and credit usage. - Action **Identify user** Identifies an anonymous visitor's device as a known person in a Bread & Butter app by attaching their email address and name. - Action **List app triggers** Returns the triggers set up in a Bread & Butter app, including webhook subscriptions, with their kind, filters and activity state. - Action **List custom event definitions** Returns the event definitions configured in a Bread & Butter app, optionally filtered to enabled or disabled ones. - Action **List Events** Returns the events recorded in a Bread & Butter app — sign-ins, page views, custom events, form submissions and more — optionally narrowed to one user or a date range. - Action **List lead lists** Returns all lead lists in a Bread & Butter app, including each list's status, lead counts and credit usage. - Action **List tags** Returns every tag defined in a Bread & Butter app, with each tag's id and name. - Action **List user events** Returns the page views and events (sign-ins, custom events, form submissions and more) a user recorded during one of their sessions in a Bread & Butter app. - Action **List users** Returns the users (visitors and leads) recorded in a Bread & Butter app, optionally narrowed to one email address or user state. - Action **List user sessions** Lists the sessions of one Bread & Butter user, newest first, with each session's ID, start time, location, device and page view count. - Action **Record external authentication** Records that a visitor signed in through your own login system, linking their device to the user with that email address. - Action **Register device** Registers a new visitor device in a Bread & Butter app and returns its device ID. - Action **Update user lead status** Updates a user's lead status in a Bread & Butter app by setting their lead status rank. - Action **Add event** Adds an event to an agent run's timeline in OnceOnly, such as a step starting, a tool call, or a failure. - Action **Add policy** Creates or updates the governance policy for an agent, such as rate limits, spend limits and allowed or blocked tools. - Action **Add tool** Creates or updates a tool in your OnceOnly tool registry, pointing at your backend URL. Returns the saved tool without its secret. - Action **Check & Lock** Checks an idempotency key and locks it if it is new, telling you whether the event is a first occurrence or a duplicate. - Action **Delete tool** Permanently deletes a tool from your OnceOnly tool registry. - Action **Get policy** Returns the governance policy configured for an agent. - Action **Get run** Returns a run's timeline: the run id, the total number of events and the list of events recorded for it. - Action **Get tool** Returns the details of a registered tool by name, including its URL, scope, enabled state and retry settings. - Action **List policies** Returns every agent policy on the OnceOnly account, each with its agent id and policy settings. - Action **List runs** Returns the runs recorded on your OnceOnly account, with each run's latest status and event count. - Action **List tools** Returns the tools registered in your OnceOnly tool registry for a scope. ## Each app on its own - [ **Bread & Butter** Augment your lead funnel with first-party data.](https://apiant.ai/connections/bread-butter) - [ **OnceOnly** OnceOnly is an idempotency API that prevents duplicate automation runs by blocking repeated events in...](https://apiant.ai/connections/onceonly) Reviews ## What our customers say ## More from Bread & Butter - [ **Bread & Butter to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/bread-butter-to-hubspot) - [ **Bread & Butter to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/bread-butter-to-salesforce) - [ **Bread & Butter to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/bread-butter-to-slack) - [ **Bread & Butter to Google Sheets** Google Sheets](https://apiant.ai/connect/bread-butter-to-google-sheets) - [ **Bread & Butter to Gmail** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/bread-butter-to-gmail) - [ **Bread & Butter to Google Calendar** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/bread-butter-to-google-calendar) ## More into OnceOnly - [ **HubSpot to OnceOnly** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-onceonly) - [ **Salesforce to OnceOnly** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-onceonly) - [ **Slack to OnceOnly** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-onceonly) - [ **Google Sheets to OnceOnly** Google Sheets](https://apiant.ai/connect/google-sheets-to-onceonly) - [ **Gmail to OnceOnly** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-onceonly) - [ **Google Calendar to OnceOnly** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-onceonly) Questions ## Bread & Butter and OnceOnly, answered ### ### What can start an automation from Bread & Butter? Any of Bread & Butter's 6 triggers in the catalog, including New Authentication, New Contact Us Submission, New Custom Fields and New Custom User Event. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in OnceOnly when something happens in Bread & Butter? Any of OnceOnly's 11 actions, including Add event, Add policy, Add tool and Check & Lock. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from OnceOnly to Bread & Butter? OnceOnly has no triggers in the catalog today, so automations start in Bread & Butter. If you need the other direction, ask: your agent reads OnceOnly's API documentation and adds it. ### ### Do I have to build a connector for Bread & Butter or OnceOnly? No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running. ### ### Can my AI client use Bread & Butter and OnceOnly without building an automation? Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both. ### ### What happens when something fails? Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships. ### ### Is there a free plan? Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.