--- title: "Connect Basecamp 3 and Sellsy - APIANT.ai" description: "When \"New Project\" fires in Basecamp 3, your agent runs \"Create Contact\" in Sellsy, or \"New Company\" in Sellsy to \"Get project\" in Basecamp 3." canonical: "https://apiant.ai/connect/basecamp-3-to-sellsy" --- # Connect Basecamp 3 and Sellsy When **New Project** fires in [Basecamp 3](https://apiant.ai/connections/basecamp-3), your agent runs **Create Contact** in [Sellsy](https://apiant.ai/connections/sellsy), or **New Company** in Sellsy to **Get project** in Basecamp 3. Describe the whole flow and it is built, tested on every scenario and kept running. Basecamp 3 **3** triggers Basecamp 3 **5** actions Sellsy **9** triggers Sellsy **15** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Basecamp 3 and Sellsy 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 Basecamp 3 and Sellsy can do together ### From Basecamp 3 to Sellsy - When **New Project** in Basecamp 3 then **Create Contact** in Sellsy - When **New To-do** in Basecamp 3 then **Create Task** in Sellsy ### From Sellsy to Basecamp 3 - When **New Company** in Sellsy then **Get project** in Basecamp 3 - When **New Contact** in Sellsy then **List projects** in Basecamp 3 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 Basecamp 3 and Sellsy ## Triggers and actions 12 triggers · 20 actions - Trigger **New Project** Polling trigger that fires when a new project is created in the Basecamp account. - Trigger **New To-do** Instant (webhook) trigger that fires when a new to-do is created in the selected Basecamp project. Basecamp POSTs a webhook event payload; the kind is filtered to todo_created and the recording (the to-do) is surfaced. - Trigger **New To-do in any project** Instant (webhook) trigger that fires when a new to-do is created in any Basecamp project. Basecamp POSTs a webhook event payload; the kind is filtered to todo_created and the recording (the to-do) is surfaced. - Action **Create Webhook** Creates a webhook subscription in a Basecamp project (bucket), delivering events to a payload URL. Returns the webhook id and details. - Action **Delete Webhook** Deletes a registered webhook from a Basecamp project (bucket). Returns the deleted webhook id. - Action **Get project** Retrieves a single Basecamp project by its ID, including its tools (dock) and people summary. - Action **List people** Lists every person visible to the connected user on the Basecamp account. - Action **List projects** Lists the projects visible to the connected user, most recently created first, optionally filtered by status. - Trigger **Deleted Task** Triggers when a task is deleted. - Trigger **New Company** Triggers when a new company (client or prospect) is created. - Trigger **New Contact** Triggers when a new contact is created. - Trigger **New Opportunity** Triggers when a new opportunity is created. - Trigger **New Task** Triggers when a new task is created. - Trigger **Updated Company** Triggers when a company (client or prospect) is updated. - Trigger **Updated Contact** Triggers when a contact is updated. - Trigger **Updated Opportunity Status** Triggers when the status is changed on an opportunity. - Trigger **Updated Task** Triggers when a task is updated. - Action **Create Annotation** Creates a new annotation. - Action **Create Company** Creates a new company (prospect or client). - Action **Create Contact** Creates a new contact. - Action **Create Opportunity** Creates an opportunity. - Action **Create Task** Creates a new Task. - Action **Create/Update Company** Creates a new company (prospect or client). Make an update if we found an existing company with provided email. - Action **Create/Update Contact** Creates a new contact. Make an update if we found an existing contact with provided email. - Action **Delete Task** Deletes a Sellsy task. - Action **Find Company** Finds an existing company (prospect or client). - Action **Find Contact** Finds an existing contact. - Action **Get Opportunity** Returns one Sellsy opportunity by id. - Action **Get Task** Returns one Sellsy task by id. - Action **List Opportunity Pipeline Steps** Lists the steps of a pipeline; supplies the required step id for Create Opportunity. - Action **Update Opportunity** updates an existing opportunity's fields, including its status (open/won/lost/cancelled/...) and pipeline step; a status change fires the opportunity.status webhook event. - Action **Update Task** updates a task's title, description, due date, status etc.; fires task.updated. ## Each app on its own - [ **Basecamp 3** Basecamp 3 is a project management and team collaboration tool by 37signals.](https://apiant.ai/connections/basecamp-3) - [ **Sellsy** Sellsy is a French SaaS that helps SMBs and VBEs manage sales, invoicing, marketing, and cash flow in one...](https://apiant.ai/connections/sellsy) Reviews ## What our customers say ## More from Basecamp 3 - [ **Basecamp 3 to FreeAgent** FreeAgent is cloud accounting software for small businesses and freelancers — manage contacts, invoices...](https://apiant.ai/connect/basecamp-3-to-freeagent) - [ **Basecamp 3 to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/basecamp-3-to-hubspot) - [ **Basecamp 3 to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/basecamp-3-to-salesforce) - [ **Basecamp 3 to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/basecamp-3-to-slack) - [ **Basecamp 3 to Google Sheets** Google Sheets](https://apiant.ai/connect/basecamp-3-to-google-sheets) - [ **Basecamp 3 to Gmail** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/basecamp-3-to-gmail) ## More into Sellsy - [ **Discord to Sellsy** Discord is an all-in-one voice and text chat for gamers.](https://apiant.ai/connect/discord-to-sellsy) - [ **HubSpot to Sellsy** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-sellsy) - [ **Salesforce to Sellsy** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-sellsy) - [ **Google Sheets to Sellsy** Google Sheets](https://apiant.ai/connect/google-sheets-to-sellsy) - [ **Gmail to Sellsy** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-sellsy) - [ **Google Calendar to Sellsy** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-sellsy) Questions ## Basecamp 3 and Sellsy, answered ### ### What can start an automation from Basecamp 3? Any of Basecamp 3's 3 triggers in the catalog, including New Project, New To-do and New To-do in any project. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Sellsy when something happens in Basecamp 3? Any of Sellsy's 15 actions, including Create Annotation, Create Company, Create Contact and Create Opportunity. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Sellsy to Basecamp 3? Yes. When something happens in Sellsy, your agent can act in Basecamp 3 too. This page covers both directions: Sellsy's triggers and Basecamp 3's actions are listed here as well. ### ### Do I have to build a connector for Basecamp 3 or Sellsy? 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 Basecamp 3 and Sellsy 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.