--- title: "Connect Harpoon and Klaviyo - APIANT.ai" description: "When \"New Client\" fires in Harpoon, your agent runs \"Add Categories to Catalog Item\" in Klaviyo, or \"New Event\" in Klaviyo to \"Add Invoice\" in Harpoon." canonical: "https://apiant.ai/connect/harpoon-to-klaviyo" --- # Connect Harpoon and Klaviyo When **New Client** fires in [Harpoon](https://apiant.ai/connections/harpoon), your agent runs **Add Categories to Catalog Item** in [Klaviyo](https://apiant.ai/connections/klaviyo), or **New Event** in Klaviyo to **Add Invoice** in Harpoon. Describe the whole flow and it is built, tested on every scenario and kept running. Harpoon **9** triggers Harpoon **46** actions Klaviyo **2** triggers Klaviyo **138** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Harpoon and Klaviyo 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 Harpoon and Klaviyo can do together ### From Harpoon to Klaviyo - When **New Client** in Harpoon then **Add Categories to Catalog Item** in Klaviyo - When **New Contact** in Harpoon then **Add Items to Catalog Category** in Klaviyo ### From Klaviyo to Harpoon - When **New Event** in Klaviyo then **Add Invoice** in Harpoon - When **New or Updated Profile** in Klaviyo then **Add Lead Source** in Harpoon 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 Harpoon and Klaviyo ## Triggers and actions 11 triggers · 184 actions - Trigger **New Client** Triggered when a new client is created in Harpoon. - Trigger **New Contact** Triggered when a new contact is created in Harpoon. - Trigger **New Expense** Triggered when a new expense is created in your Harpoon account. - Trigger **New Expense Category** Triggered when a new expense category is created in Harpoon. - Trigger **New Invoice** Triggered when a new invoice is created in Harpoon. - Trigger **New Payment** Triggered when a new payment is recorded in your Harpoon account. - Trigger **New Project** Triggered when a new project is created in Harpoon. - Trigger **New Task Category** Triggered when a new task category is added in your Harpoon account. - Trigger **New Time Entry** Triggered when a new time entry is logged in Harpoon. - Action **Add Credit Entry** Creates a new credit entry on a client's account in Harpoon, recording an amount, a date and an optional note or originating invoice. Returns the credit entry that was created. - Action **Add Invoice** Creates a new invoice in Harpoon for a client or project, with an invoice number, issue date, and optional line items. Returns the invoice that was created. - Action **Add Lead Source** Creates a new lead source in Harpoon, so new clients can be tagged with where they came from. Returns the lead source that was created. - Action **Add Note** Adds a note to a client, project or invoice in Harpoon. Returns the note that was created. - Action **Add Team** Creates a new team in your Harpoon account. Harpoon populates the new team from your account details; the API accepts no team attributes on creation. - Action **Clone Time Entry** Creates a copy of an existing time entry in Harpoon. The copy keeps the original's project, task and description, and starts with today's date and zero hours logged. - Action **Create Contact** Creates a contact person under a Harpoon client, with their name, email address, and phone number. Returns the contact that was created. - Action **Create Expense** Records a one-off expense in Harpoon with its date, amount, and vendor, optionally attributed to a client, project, or expense category. Returns the expense that was created. - Action **Create Expense Category** Creates a new expense category in your Harpoon account so expenses can be grouped under it. - Action **Create Project** Creates a project in Harpoon for a client, with its budget, rate, and start and end dates. Returns the project that was created. - Action **Create Time Entry** Logs hours worked in Harpoon for a team member on a given date, optionally against a client or project. Returns the time entry that was created. - Action **Delete Client** Deletes a client from your Harpoon account. - Action **Delete Expense** Permanently deletes an expense from your Harpoon account. - Action **Delete Invoice** Permanently removes an invoice from Harpoon. Returns Harpoon's confirmation that the invoice was deleted. - Action **Delete Note** Deletes a note from your Harpoon account. - Action **Delete Recurring Expense** Deletes a recurring expense template from Harpoon by its id, so it stops generating new expenses. - Action **Delete Recurring Invoice** Stops and removes a recurring invoice schedule in Harpoon so it no longer generates invoices. Returns Harpoon's confirmation that it was deleted. - Action **Delete Time Entry** Deletes a time entry from your Harpoon account. - Action **Get Client** Returns a single client from your Harpoon account, including its name, contact details and other stored attributes. - Action **Get Client Credits** Returns a client's credit entries in Harpoon, along with the credit still available on the account. - Action **Get Contact** Returns a single Harpoon contact, including their name, email address, phone number, and the client they belong to. - Action **Get Estimate** Returns a single estimate from your Harpoon account, including its client, line items, totals and status. - Action **Get Expense** Returns a single expense from your Harpoon account, including its amount, date, vendor, category and the client or project it is attached to. - Action **Get Expense Category** Returns a single Harpoon expense category with every detail it carries, including its name and budget settings. - Action **Get Invoice** Fetches one invoice from Harpoon by its id, with its client, line items and payment totals. An error occurs if the invoice is not found. - Action **Get Lead Source** Returns a single lead source from your Harpoon account. - Action **Get Project** Returns a single project from your Harpoon account, including its client, budget and status. - Action **Get Recurring Expense** Fetches one recurring expense template from Harpoon by its id, with its vendor, amount, frequency and schedule. An error occurs if it is not found. - Action **Get Recurring Invoice** Returns a single recurring invoice schedule from Harpoon, including its client, frequency, dates, and line items. - Action **Get Task** Returns a single task category from your Harpoon account, including its name and hourly rate. - Action **Get Team** Returns a single team from your Harpoon account, including its name, email address, phone, address, owner and whether it is active. - Action **Get Time Entry** Returns a single tracked time entry from your Harpoon account, including its date, hours, client, project and notes. - Action **List Contacts** Returns the contacts in your Harpoon account, including each contact's name, email address and phone number. - Action **List Estimates** Returns the estimates in a Harpoon account, optionally narrowed to a year, client, project, status, or search text. - Action **List Expense Categories** Returns the expense categories set up in Harpoon, each with its budget settings. - Action **List Expenses** Returns the expenses in your Harpoon account, optionally narrowed by date range, client, project, category, billing status or search text. - Action **List Invoices** Returns the invoices in your Harpoon account, optionally narrowed by year, client, project, status or a search term. - Action **List Projects** Returns the projects in a Harpoon account, with their client, budget, rate, and dates. - Action **List Teams** Returns the teams in your Harpoon account, along with the total number of teams found. - Action **List Time Entries** Returns time entries from your Harpoon account — either the timers running now or logged history for a date range — optionally narrowed by client, project, task, team member or billing status. - Action **Update Expense** Updates an existing expense in your Harpoon account. Only the values you supply are changed. - Action **Update Invoice** Updates an existing invoice in your Harpoon account. Only the values you supply are changed. - Action **Update Project** Updates an existing project in Harpoon — its name, client, billing type, status, dates, budget and task rates. Returns the updated project. - Action **Update Recurring Expense** Updates a recurring expense in Harpoon — its vendor, amount, frequency, category, dates, and status. Anything left blank keeps its current value. Returns the updated recurring expense. - Action **Update Recurring Invoice** Updates an existing recurring invoice template in your Harpoon account. Only the values you supply are changed. - Action **Update Time Entry** Updates an existing time entry in Harpoon — its date, hours, description, project, task or billing state. - Trigger **New Event** Polling trigger. Fires when a new event (metric occurrence) is recorded, ordered by most-recent datetime. - Trigger **New or Updated Profile** Polling trigger. Fires when a profile is created or updated, ordered by most-recently updated. - Action **Add Categories to Catalog Item** Add Categories to Catalog Item - Action **Add Items to Catalog Category** Add Items to Catalog Category - Action **Add Profiles to List** Add Profiles to List - Action **Add Profile to List** Add an existing profile to a list by profile ID. - Action **Bulk Create Catalog Categories** Bulk Create Catalog Categories - Action **Bulk Create Catalog Items** Bulk Create Catalog Items - Action **Bulk Create Catalog Variants** Bulk Create Catalog Variants - Action **Bulk Create Coupon Codes** Bulk Create Coupon Codes - Action **Bulk Create Events** Bulk Create Events - Action **Bulk Delete Catalog Categories** Bulk Delete Catalog Categories - Action **Bulk Delete Catalog Items** Bulk Delete Catalog Items - Action **Bulk Delete Catalog Variants** Bulk Delete Catalog Variants - Action **Bulk Import Profiles** Bulk Import Profiles - Action **Bulk Subscribe Profiles** Bulk Subscribe Profiles - Action **Bulk Suppress Profiles** Bulk Suppress Profiles - Action **Bulk Unsubscribe Profiles** Bulk Unsubscribe Profiles - Action **Bulk Unsuppress Profiles** Bulk Unsuppress Profiles - Action **Bulk Update Catalog Categories** Bulk Update Catalog Categories - Action **Bulk Update Catalog Items** Bulk Update Catalog Items - Action **Bulk Update Catalog Variants** Bulk Update Catalog Variants - Action **Cancel Campaign Send** Cancel Campaign Send - Action **Clone Campaign** Clone Campaign - Action **Clone Template** Clone Template - Action **Create Back In Stock Subscription** Create Back In Stock Subscription - Action **Create Campaign** Create Campaign - Action **Create Campaign Clone** Create Campaign Clone - Action **Create Catalog Category** Create Catalog Category - Action **Create Catalog Item** Create Catalog Item - Action **Create Catalog Variant** Create Catalog Variant - Action **Create Coupon** Create Coupon - Action **Create Coupon Code** Create Coupon Code - Action **Create Event** Track an event for a profile (e.g. a custom metric like "Placed Order"). - Action **Create Flow** Create Flow - Action **Create List** Create a new list. - Action **Create or Update Profile** Create a profile if it doesn't exist, otherwise update the matching profile (upsert by email/phone/id). - Action **Create Profile** Create a new profile. Errors if a profile with the email already exists. - Action **Create Segment** Create Segment - Action **Create Tag** Create Tag - Action **Create Template** Create Template - Action **Delete Campaign** Delete Campaign - Action **Delete Catalog Category** Delete Catalog Category - Action **Delete Catalog Item** Delete Catalog Item - Action **Delete Catalog Variant** Delete Catalog Variant - Action **Delete Coupon** Delete Coupon - Action **Delete Coupon Code** Delete Coupon Code - Action **Delete Flow** Delete Flow - Action **Delete List** Delete List - Action **Delete Segment** Delete Segment - Action **Delete Tag** Delete Tag - Action **Delete Template** Delete Template - Action **Get Campaign** Get Campaign - Action **Get Campaign Recipient Estimation** Get Campaign Recipient Estimation - Action **Get Campaigns** Get Campaigns - Action **Get Catalog Categories** Get Catalog Categories - Action **Get Catalog Category** Get Catalog Category - Action **Get Catalog Item** Get Catalog Item - Action **Get Catalog Items** Get Catalog Items - Action **Get Catalog Variant** Get Catalog Variant - Action **Get Catalog Variants** Get Catalog Variants - Action **Get Coupon** Get Coupon - Action **Get Coupon Code** Get Coupon Code - Action **Get Coupon Codes** Get Coupon Codes - Action **Get Coupons** Get Coupons - Action **Get Event** Get Event - Action **Get Events** Retrieve events, optionally filtered (e.g. by metric or profile). - Action **Get Flow** Get Flow - Action **Get Flows** Get Flows - Action **Get Flows Triggered by List** Get Flows Triggered by List - Action **Get Flows Triggered by Metric** Get Flows Triggered by Metric - Action **Get Flows Triggered by Segment** Get Flows Triggered by Segment - Action **Get Form** Get Form - Action **Get Forms** Get Forms - Action **Get Form Version** Get Form Version - Action **Get Image** Get Image - Action **Get Images** Get Images - Action **Get List** Get List - Action **Get List Profiles** Get all profiles that are members of a given list. - Action **Get Lists** Retrieve all lists in the account. - Action **Get Metric** Get Metric - Action **Get Metrics** Retrieve all metrics in the account. - Action **Get Profile** Get Profile - Action **Get Profile by Email** Fetch a single profile by its email address. Emits empty values if no profile is found. - Action **Get Profile by ID** Fetch a single profile by its Klaviyo profile ID. - Action **Get Profiles** List profiles, optionally filtered by email or other attributes. - Action **Get Push Tokens** Get Push Tokens - Action **Get Reviews** Get Reviews - Action **Get Segment** Get Segment - Action **Get Segment Profiles** Get all profiles in a given segment. - Action **Get Segments** Retrieve all segments in the account. - Action **Get Tag** Get Tag - Action **Get Tags** Get Tags - Action **Get Template** Get Template - Action **Get Templates** Get Templates - Action **Merge Profiles** Merge Profiles - Action **Query Campaign Values** Query Campaign Values - Action **Query Flow Series** Query Flow Series - Action **Query Flow Values** Query Flow Values - Action **Query Form Series** Query Form Series - Action **Query Form Values** Query Form Values - Action **Query Metric Aggregates** Query Metric Aggregates - Action **Query Segment Series** Query Segment Series - Action **Query Segment Values** Query Segment Values - Action **Refresh Campaign Recipient Estimation** Refresh Campaign Recipient Estimation - Action **Remove Categories from Catalog Item** Remove Categories from Catalog Item - Action **Remove Items from Catalog Category** Remove Items from Catalog Category - Action **Remove Profile from List** Remove a profile from a list by profile ID. - Action **Remove Profiles from List** Remove Profiles from List - Action **Remove Tag from Campaigns** Remove Tag from Campaigns - Action **Remove Tag from Flows** Remove Tag from Flows - Action **Remove Tag from Lists** Remove Tag from Lists - Action **Remove Tag from Segments** Remove Tag from Segments - Action **Render Template** Render Template - Action **Request Profile Deletion** Request Profile Deletion - Action **Send Campaign** Send Campaign - Action **Subscribe Profile** Subscribe a profile (email/SMS consent) to a given list. - Action **Suppress Profile** Suppress a profile from receiving email marketing (global suppression). - Action **Tag Campaigns** Tag Campaigns - Action **Tag Flows** Tag Flows - Action **Tag Lists** Tag Lists - Action **Tag Segments** Tag Segments - Action **Unsubscribe Profile** Unsubscribe a profile from email/SMS marketing for a given list. - Action **Update Campaign** Update Campaign - Action **Update Catalog Category** Update Catalog Category - Action **Update Catalog Item** Update Catalog Item - Action **Update Catalog Variant** Update Catalog Variant - Action **Update Categories for Catalog Item** Update Categories for Catalog Item - Action **Update Coupon** Update Coupon - Action **Update Coupon Code** Update Coupon Code - Action **Update Flow Status** Update Flow Status - Action **Update Image** Update a Klaviyo image. Reads the image first, overlays only the values you supply, then saves the merged result — so anything you leave blank keeps its current value. - Action **Update Items for Catalog Category** Update Items for Catalog Category - Action **Update List** Update List - Action **Update Profile** Update an existing profile by its Klaviyo profile ID. - Action **Update Segment** Update Segment - Action **Update Tag** Update Tag - Action **Update Template** Update Template - Action **Upload Image From File** Upload Image From File - Action **Upload Image From URL** Upload Image From URL ## Each app on its own - [ **Harpoon** Harpoon is a financial planning, scheduling, time-tracking, invoicing, and budgeting platform for...](https://apiant.ai/connections/harpoon) - [ **Klaviyo** Klaviyo is a marketing automation platform for email and SMS.](https://apiant.ai/connections/klaviyo) Reviews ## What our customers say ## More from Harpoon - [ **Harpoon to Bugcrowd** Bugcrowd API for interacting and tracking the reported issues programmatically](https://apiant.ai/connect/harpoon-to-bugcrowd) - [ **Harpoon to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/harpoon-to-hubspot) - [ **Harpoon to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/harpoon-to-salesforce) - [ **Harpoon to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/harpoon-to-slack) - [ **Harpoon to Google Sheets** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/harpoon-to-google-sheets) - [ **Harpoon to Gmail** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/harpoon-to-gmail) ## More into Klaviyo - [ **HubSpot to Klaviyo** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-klaviyo) - [ **ActiveCampaign to Klaviyo** ActiveCampaign is a marketing automation, email marketing, and CRM platform.](https://apiant.ai/connect/activecampaign-to-klaviyo) - [ **JIRA to Klaviyo** Atlassian JIRA Cloud — issue tracking and project management.](https://apiant.ai/connect/jira-to-klaviyo) - [ **Intercom to Klaviyo** Intercom is a customer communications platform for support, engagement, and marketing.](https://apiant.ai/connect/intercom-to-klaviyo) - [ **Freshdesk to Klaviyo** Freshdesk is a cloud-based customer support and helpdesk platform.](https://apiant.ai/connect/freshdesk-to-klaviyo) - [ **Webflow to Klaviyo** Webflow is a professional website builder and CMS for designing, building, and launching responsive...](https://apiant.ai/connect/webflow-to-klaviyo) Questions ## Harpoon and Klaviyo, answered ### ### What can start an automation from Harpoon? Any of Harpoon's 9 triggers in the catalog, including New Client, New Contact, New Expense and New Expense Category. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Klaviyo when something happens in Harpoon? Any of Klaviyo's 138 actions, including Create Back In Stock Subscription, Create Campaign, Create Campaign Clone and Create Catalog Category. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Klaviyo to Harpoon? Yes. When something happens in Klaviyo, your agent can act in Harpoon too. This page covers both directions: Klaviyo's triggers and Harpoon's actions are listed here as well. ### ### Do I have to build a connector for Harpoon or Klaviyo? 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 Harpoon and Klaviyo 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.