--- title: "Connect Bart and Langfuse - APIANT.ai" description: "When \"New service advisory\" fires in Bart, your agent runs \"Add Comment\" in Langfuse." canonical: "https://apiant.ai/connect/bart-to-langfuse" --- # Connect Bart and Langfuse When **New service advisory** fires in [Bart](https://apiant.ai/connections/bart), your agent runs **Add Comment** in [Langfuse](https://apiant.ai/connections/langfuse), or **New Trace** in Langfuse to **Find trips by origin and destination** in Bart. Describe the whole flow and it is built, tested on every scenario and kept running. Bart **1** trigger Bart **8** actions Langfuse **1** trigger Langfuse **14** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Bart and Langfuse 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 Bart and Langfuse can do together ### From Bart to Langfuse - When **New service advisory** in Bart then **Add Comment** in Langfuse - When **New service advisory** in Bart then **Add Dataset Item** in Langfuse ### From Langfuse to Bart - When **New Trace** in Langfuse then **Find trips by origin and destination** in Bart - When **New Trace** in Langfuse then **Get route** in Bart 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 Bart and Langfuse ## Triggers and actions 2 triggers · 22 actions - Trigger **New service advisory** Triggers when BART posts a new service advisory (delay, emergency or information notice). - Action **Find trips by origin and destination** Finds BART trips departing from an origin station to a destination station around a given time, with fares and legs for each trip. - Action **Get route** Returns details for a BART route: its name, colour, origin and destination, and the ordered list of stations it serves. - Action **Get station** Returns detailed information about a BART station, including its address, location, routes, platforms and nearby attractions. - Action **Get station schedule** Returns the full day's scheduled train departures from a BART station, with line, destination, time and platform for each. - Action **List real-time departures** Returns the current estimated departure times for trains leaving a BART station, grouped by destination. - Action **List routes** Returns the list of BART routes (lines) in service for the current or a chosen schedule date. - Action **List service advisories** Returns BART's current service advisories (delays, emergencies and general information). - Action **List stations** Returns every BART station with its full name, abbreviation, coordinates and address. - Trigger **New Trace** Polling trigger: fires for newly created traces (dedup by trace id / timestamp). - Action **Add Comment** Add a comment to a trace/observation/session/prompt object. - Action **Add Dataset** Create a new dataset. - Action **Add Dataset Item** Create an item (input/expected_output/metadata) in a dataset. - Action **Add Prompt** Create a new prompt version (text or chat). - Action **Add Score** Create a score attached to a trace/observation/session (numeric, categorical, or boolean). - Action **Delete Trace** Delete a trace by id. - Action **Get Project** Reads the Langfuse project that the connection's project-scoped API key belongs to. - Action **Get Prompt** Get a prompt by name (and optional version/label). - Action **Get Trace** Get a single trace by id, including nested observations/scores. - Action **List Dataset Items** List items in a dataset. - Action **List Datasets** List all datasets in the project. - Action **List Prompts** List all prompts in the project. - Action **List Scores** List scores with optional filters. - Action **List Traces** List traces with optional filters (user, session, tags, timerange). ## Each app on its own - [ **Bart** Real-time BART (Bay Area Rapid Transit) train schedules, arrivals, and station data API.](https://apiant.ai/connections/bart) - [ **Langfuse** Langfuse is an open-source LLM engineering platform (GitHub) that helps teams collaboratively debug...](https://apiant.ai/connections/langfuse) Reviews ## What our customers say ## More from Bart - [ **Bart to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/bart-to-hubspot) - [ **Bart to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/bart-to-salesforce) - [ **Bart to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/bart-to-slack) - [ **Bart to Google Sheets** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/bart-to-google-sheets) - [ **Bart to Gmail** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/bart-to-gmail) - [ **Bart to Google Calendar** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/bart-to-google-calendar) ## More into Langfuse - [ **Salesforce to Langfuse** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-langfuse) - [ **Google Drive to Langfuse** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-langfuse) - [ **HubSpot to Langfuse** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-langfuse) - [ **Slack to Langfuse** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-langfuse) - [ **Google Sheets to Langfuse** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-langfuse) - [ **Gmail to Langfuse** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-langfuse) Questions ## Bart and Langfuse, answered ### ### What can start an automation from Bart? Any of Bart's 1 trigger in the catalog, including New service advisory. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Langfuse when something happens in Bart? Any of Langfuse's 14 actions, including Add Comment, Add Dataset, Add Dataset Item and Add Prompt. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Langfuse to Bart? Yes. When something happens in Langfuse, your agent can act in Bart too. This page covers both directions: Langfuse's triggers and Bart's actions are listed here as well. ### ### Do I have to build a connector for Bart or Langfuse? 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 Bart and Langfuse 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.