Integration
Connect Harpoon and Klaviyo
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. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Harpoon and Klaviyo to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne 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.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)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)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)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)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)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)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
From Klaviyo to 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
- New Client
Triggered when a new client is created in Harpoon.
- New Contact
Triggered when a new contact is created in Harpoon.
- New Expense
Triggered when a new expense is created in your Harpoon account.
- New Expense Category
Triggered when a new expense category is created in Harpoon.
- New Invoice
Triggered when a new invoice is created in Harpoon.
- New Payment
Triggered when a new payment is recorded in your Harpoon account.
- New Project
Triggered when a new project is created in Harpoon.
- New Task Category
Triggered when a new task category is added in your Harpoon account.
- New Time Entry
Triggered when a new time entry is logged in Harpoon.
- 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.
- 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.
- 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.
- Add Note
Adds a note to a client, project or invoice in Harpoon. Returns the note that was created.
- 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.
- 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.
- Create Contact
Creates a contact person under a Harpoon client, with their name, email address, and phone number. Returns the contact that was created.
- 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.
- Create Expense Category
Creates a new expense category in your Harpoon account so expenses can be grouped under it.
- 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.
- 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.
- Delete Client
Deletes a client from your Harpoon account.
- Delete Expense
Permanently deletes an expense from your Harpoon account.
- Delete Invoice
Permanently removes an invoice from Harpoon. Returns Harpoon's confirmation that the invoice was deleted.
- Delete Note
Deletes a note from your Harpoon account.
- Delete Recurring Expense
Deletes a recurring expense template from Harpoon by its id, so it stops generating new expenses.
- 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.
- Delete Time Entry
Deletes a time entry from your Harpoon account.
- Get Client
Returns a single client from your Harpoon account, including its name, contact details and other stored attributes.
- Get Client Credits
Returns a client's credit entries in Harpoon, along with the credit still available on the account.
- Get Contact
Returns a single Harpoon contact, including their name, email address, phone number, and the client they belong to.
- Get Estimate
Returns a single estimate from your Harpoon account, including its client, line items, totals and status.
- 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.
- Get Expense Category
Returns a single Harpoon expense category with every detail it carries, including its name and budget settings.
- 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.
- Get Lead Source
Returns a single lead source from your Harpoon account.
- Get Project
Returns a single project from your Harpoon account, including its client, budget and status.
- 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.
- Get Recurring Invoice
Returns a single recurring invoice schedule from Harpoon, including its client, frequency, dates, and line items.
- Get Task
Returns a single task category from your Harpoon account, including its name and hourly rate.
- Get Team
Returns a single team from your Harpoon account, including its name, email address, phone, address, owner and whether it is active.
- Get Time Entry
Returns a single tracked time entry from your Harpoon account, including its date, hours, client, project and notes.
- List Contacts
Returns the contacts in your Harpoon account, including each contact's name, email address and phone number.
- List Estimates
Returns the estimates in a Harpoon account, optionally narrowed to a year, client, project, status, or search text.
- List Expense Categories
Returns the expense categories set up in Harpoon, each with its budget settings.
- List Expenses
Returns the expenses in your Harpoon account, optionally narrowed by date range, client, project, category, billing status or search text.
- List Invoices
Returns the invoices in your Harpoon account, optionally narrowed by year, client, project, status or a search term.
- List Projects
Returns the projects in a Harpoon account, with their client, budget, rate, and dates.
- List Teams
Returns the teams in your Harpoon account, along with the total number of teams found.
- 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.
- Update Expense
Updates an existing expense in your Harpoon account. Only the values you supply are changed.
- Update Invoice
Updates an existing invoice in your Harpoon account. Only the values you supply are changed.
- Update Project
Updates an existing project in Harpoon — its name, client, billing type, status, dates, budget and task rates. Returns the updated project.
- 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.
- Update Recurring Invoice
Updates an existing recurring invoice template in your Harpoon account. Only the values you supply are changed.
- Update Time Entry
Updates an existing time entry in Harpoon — its date, hours, description, project, task or billing state.
- New Event
Polling trigger. Fires when a new event (metric occurrence) is recorded, ordered by most-recent datetime.
- New or Updated Profile
Polling trigger. Fires when a profile is created or updated, ordered by most-recently updated.
- Add Categories to Catalog Item
Add Categories to Catalog Item
- Add Items to Catalog Category
Add Items to Catalog Category
- Add Profiles to List
Add Profiles to List
- Add Profile to List
Add an existing profile to a list by profile ID.
- Bulk Create Catalog Categories
Bulk Create Catalog Categories
- Bulk Create Catalog Items
Bulk Create Catalog Items
- Bulk Create Catalog Variants
Bulk Create Catalog Variants
- Bulk Create Coupon Codes
Bulk Create Coupon Codes
- Bulk Create Events
Bulk Create Events
- Bulk Delete Catalog Categories
Bulk Delete Catalog Categories
- Bulk Delete Catalog Items
Bulk Delete Catalog Items
- Bulk Delete Catalog Variants
Bulk Delete Catalog Variants
- Bulk Import Profiles
Bulk Import Profiles
- Bulk Subscribe Profiles
Bulk Subscribe Profiles
- Bulk Suppress Profiles
Bulk Suppress Profiles
- Bulk Unsubscribe Profiles
Bulk Unsubscribe Profiles
- Bulk Unsuppress Profiles
Bulk Unsuppress Profiles
- Bulk Update Catalog Categories
Bulk Update Catalog Categories
- Bulk Update Catalog Items
Bulk Update Catalog Items
- Bulk Update Catalog Variants
Bulk Update Catalog Variants
- Cancel Campaign Send
Cancel Campaign Send
- Clone Campaign
Clone Campaign
- Clone Template
Clone Template
- Create Back In Stock Subscription
Create Back In Stock Subscription
- Create Campaign
Create Campaign
- Create Campaign Clone
Create Campaign Clone
- Create Catalog Category
Create Catalog Category
- Create Catalog Item
Create Catalog Item
- Create Catalog Variant
Create Catalog Variant
- Create Coupon
Create Coupon
- Create Coupon Code
Create Coupon Code
- Create Event
Track an event for a profile (e.g. a custom metric like "Placed Order").
- Create Flow
Create Flow
- Create List
Create a new list.
- Create or Update Profile
Create a profile if it doesn't exist, otherwise update the matching profile (upsert by email/phone/id).
- Create Profile
Create a new profile. Errors if a profile with the email already exists.
- Create Segment
Create Segment
- Create Tag
Create Tag
- Create Template
Create Template
- Delete Campaign
Delete Campaign
- Delete Catalog Category
Delete Catalog Category
- Delete Catalog Item
Delete Catalog Item
- Delete Catalog Variant
Delete Catalog Variant
- Delete Coupon
Delete Coupon
- Delete Coupon Code
Delete Coupon Code
- Delete Flow
Delete Flow
- Delete List
Delete List
- Delete Segment
Delete Segment
- Delete Tag
Delete Tag
- Delete Template
Delete Template
- Get Campaign
Get Campaign
- Get Campaign Recipient Estimation
Get Campaign Recipient Estimation
- Get Campaigns
Get Campaigns
- Get Catalog Categories
Get Catalog Categories
- Get Catalog Category
Get Catalog Category
- Get Catalog Item
Get Catalog Item
- Get Catalog Items
Get Catalog Items
- Get Catalog Variant
Get Catalog Variant
- Get Catalog Variants
Get Catalog Variants
- Get Coupon
Get Coupon
- Get Coupon Code
Get Coupon Code
- Get Coupon Codes
Get Coupon Codes
- Get Coupons
Get Coupons
- Get Event
Get Event
- Get Events
Retrieve events, optionally filtered (e.g. by metric or profile).
- Get Flow
Get Flow
- Get Flows
Get Flows
- Get Flows Triggered by List
Get Flows Triggered by List
- Get Flows Triggered by Metric
Get Flows Triggered by Metric
- Get Flows Triggered by Segment
Get Flows Triggered by Segment
- Get Form
Get Form
- Get Forms
Get Forms
- Get Form Version
Get Form Version
- Get Image
Get Image
- Get Images
Get Images
- Get List
Get List
- Get List Profiles
Get all profiles that are members of a given list.
- Get Lists
Retrieve all lists in the account.
- Get Metric
Get Metric
- Get Metrics
Retrieve all metrics in the account.
- Get Profile
Get Profile
- Get Profile by Email
Fetch a single profile by its email address. Emits empty values if no profile is found.
- Get Profile by ID
Fetch a single profile by its Klaviyo profile ID.
- Get Profiles
List profiles, optionally filtered by email or other attributes.
- Get Push Tokens
Get Push Tokens
- Get Reviews
Get Reviews
- Get Segment
Get Segment
- Get Segment Profiles
Get all profiles in a given segment.
- Get Segments
Retrieve all segments in the account.
- Get Tag
Get Tag
- Get Tags
Get Tags
- Get Template
Get Template
- Get Templates
Get Templates
- Merge Profiles
Merge Profiles
- Query Campaign Values
Query Campaign Values
- Query Flow Series
Query Flow Series
- Query Flow Values
Query Flow Values
- Query Form Series
Query Form Series
- Query Form Values
Query Form Values
- Query Metric Aggregates
Query Metric Aggregates
- Query Segment Series
Query Segment Series
- Query Segment Values
Query Segment Values
- Refresh Campaign Recipient Estimation
Refresh Campaign Recipient Estimation
- Remove Categories from Catalog Item
Remove Categories from Catalog Item
- Remove Items from Catalog Category
Remove Items from Catalog Category
- Remove Profile from List
Remove a profile from a list by profile ID.
- Remove Profiles from List
Remove Profiles from List
- Remove Tag from Campaigns
Remove Tag from Campaigns
- Remove Tag from Flows
Remove Tag from Flows
- Remove Tag from Lists
Remove Tag from Lists
- Remove Tag from Segments
Remove Tag from Segments
- Render Template
Render Template
- Request Profile Deletion
Request Profile Deletion
- Send Campaign
Send Campaign
- Subscribe Profile
Subscribe a profile (email/SMS consent) to a given list.
- Suppress Profile
Suppress a profile from receiving email marketing (global suppression).
- Tag Campaigns
Tag Campaigns
- Tag Flows
Tag Flows
- Tag Lists
Tag Lists
- Tag Segments
Tag Segments
- Unsubscribe Profile
Unsubscribe a profile from email/SMS marketing for a given list.
- Update Campaign
Update Campaign
- Update Catalog Category
Update Catalog Category
- Update Catalog Item
Update Catalog Item
- Update Catalog Variant
Update Catalog Variant
- Update Categories for Catalog Item
Update Categories for Catalog Item
- Update Coupon
Update Coupon
- Update Coupon Code
Update Coupon Code
- Update Flow Status
Update Flow Status
- 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.
- Update Items for Catalog Category
Update Items for Catalog Category
- Update List
Update List
- Update Profile
Update an existing profile by its Klaviyo profile ID.
- Update Segment
Update Segment
- Update Tag
Update Tag
- Update Template
Update Template
- Upload Image From File
Upload Image From File
- Upload Image From URL
Upload Image From URL
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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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.