--- title: "Connect Langfuse and Mailjet - APIANT.ai" description: "When \"New Trace\" fires in Langfuse, your agent runs \"Add Contact to List\" in Mailjet, or \"New Contact\" in Mailjet to \"Add Comment\" in Langfuse." canonical: "https://apiant.ai/connect/langfuse-to-mailjet" --- # Connect Langfuse and Mailjet When **New Trace** fires in [Langfuse](https://apiant.ai/connections/langfuse), your agent runs **Add Contact to List** in [Mailjet](https://apiant.ai/connections/mailjet), or **New Contact** in Mailjet to **Add Comment** in Langfuse. Describe the whole flow and it is built, tested on every scenario and kept running. Langfuse **1** trigger Langfuse **14** actions Mailjet **3** triggers Mailjet **16** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Langfuse and Mailjet 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 Langfuse and Mailjet can do together ### From Langfuse to Mailjet - When **New Trace** in Langfuse then **Add Contact to List** in Mailjet - When **New Trace** in Langfuse then **Create Contact** in Mailjet ### From Mailjet to Langfuse - When **New Contact** in Mailjet then **Add Comment** in Langfuse - When **New Contact in List** in Mailjet then **Add Dataset Item** in Langfuse 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 Langfuse and Mailjet ## Triggers and actions 4 triggers · 30 actions - 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). - Trigger **New Contact** Polls for newly created contacts across the account. - Trigger **New Contact in List** Polls for contacts newly added to a specific contact list. - Trigger **New Contact List** Polls for newly created contact lists. - Action **Add Contact to List** Add (subscribe) a contact to a contact list via managecontact. - Action **Create Contact** Create a new contact. - Action **Create Contact List** Create a new contact list. - Action **Create Contact Property** Create a custom contact property (contactmetadata). - Action **Delete Contact List** Delete a contact list by ID. - Action **Get Contact** Retrieve a contact by ID or email address. - Action **Get Contact Data** Returns all the contact property values stored on a Mailjet contact. An error occurs if the contact is not found. - Action **Get Contact List** Retrieve a contact list by ID. - Action **Get Contacts in List** List contacts belonging to a specific contact list. - Action **Get Message** Retrieve a message by its ID. - Action **Get Statistics** Retrieve aggregated message/campaign statistics counters. - Action **List Contact Lists** List all contact lists. - Action **List Contacts** List contacts with optional pagination. - Action **Remove Contact from List** Unsubscribe/remove a contact from a contact list via managecontact. - Action **Send Email** Send a transactional or marketing email via the Send API v3.1. - Action **Update Contact** Update a contact's name or campaign-exclusion status. ## Each app on its own - [ **Langfuse** Langfuse is an open-source LLM engineering platform (GitHub) that helps teams collaboratively debug...](https://apiant.ai/connections/langfuse) - [ **Mailjet** Mailjet is an all-in-one solution to send, track and deliver transactional, notification and marketing emails.](https://apiant.ai/connections/mailjet) Reviews ## What our customers say ## More from Langfuse - [ **Langfuse to 5DollarFootball** Football fixtures, results, standings and historical odds with corner and card lines](https://apiant.ai/connect/langfuse-to-5dollarfootball) - [ **Langfuse to Cloudflare Trace** Cloudflare Trace is a free JSON wrapper over Cloudflare's edge trace endpoint that reports what Cloudflare...](https://apiant.ai/connect/langfuse-to-cloudflare-trace) - [ **Langfuse to PaperClean** Clean document photos for printing, remove shadows, fix lighting](https://apiant.ai/connect/langfuse-to-paperclean) - [ **Langfuse to Postman** Postman is a platform for building and testing APIs.](https://apiant.ai/connect/langfuse-to-postman) - [ **Langfuse to Rendobar** Hosted media processing over REST: transcode, caption, watermark video](https://apiant.ai/connect/langfuse-to-rendobar) - [ **Langfuse to Runpod** Cloud GPU platform for renting on-demand compute to train and deploy AI models, including serverless...](https://apiant.ai/connect/langfuse-to-runpod) ## More into Mailjet - [ **Mailchimp to Mailjet** Mailchimp marketing automation and email platform.](https://apiant.ai/connect/mailchimp-to-mailjet) - [ **ActiveCampaign to Mailjet** ActiveCampaign is a marketing automation, email marketing, and CRM platform.](https://apiant.ai/connect/activecampaign-to-mailjet) - [ **JIRA to Mailjet** Atlassian JIRA Cloud — issue tracking and project management.](https://apiant.ai/connect/jira-to-mailjet) - [ **Twilio to Mailjet** Cloud communications platform for sending SMS/MMS messages, making and managing voice calls, and looking up...](https://apiant.ai/connect/twilio-to-mailjet) - [ **Freshdesk to Mailjet** Freshdesk is a cloud-based customer support and helpdesk platform.](https://apiant.ai/connect/freshdesk-to-mailjet) - [ **Klaviyo to Mailjet** Klaviyo is a marketing automation platform for email and SMS.](https://apiant.ai/connect/klaviyo-to-mailjet) Questions ## Langfuse and Mailjet, answered ### ### What can start an automation from Langfuse? Any of Langfuse's 1 trigger in the catalog, including New Trace. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Mailjet when something happens in Langfuse? Any of Mailjet's 16 actions, including Create Contact, Create Contact List, Create Contact Property and Send Email. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Mailjet to Langfuse? Yes. When something happens in Mailjet, your agent can act in Langfuse too. This page covers both directions: Mailjet's triggers and Langfuse's actions are listed here as well. ### ### Do I have to build a connector for Langfuse or Mailjet? 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 Langfuse and Mailjet 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.