Integration
Connect Beehiiv and Harpoon
When New subscriber to publication fires in Beehiiv, your agent runs Add Invoice in Harpoon, or New Client in Harpoon to Update subscription by email in Beehiiv. 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 Beehiiv and Harpoon 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 Beehiiv and Harpoon can do together
From Beehiiv to Harpoon
When New subscriber to publication in Beehiiv
then Add Invoice in Harpoon
When New unsubscriber to publication in Beehiiv
then Add Lead Source in Harpoon
From Harpoon to Beehiiv
When New Client in Harpoon
then Update subscription by email in Beehiiv
When New Contact in Harpoon
then Add subscription tag in Beehiiv
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 Beehiiv and Harpoon
Triggers and actions 17 triggers · 89 actions
Trigger
List automationspoll for automations; new automations surface over time (trigger).
Trigger
List newsletter listspoll newsletter lists; new lists surface over time (trigger).
Trigger
List pollspoll for polls; new polls surface over time (trigger).
Trigger
List segment subscriber IDspoll subscriber IDs in a segment; new IDs surface over time (trigger).
Trigger
List segment subscriberspoll subscribers in a segment; new members surface over time (trigger).
Trigger
List tierspoll subscription tiers; new tiers surface over time (trigger).
Trigger
New subscriber to publicationPolls Beehiiv and emits each new subscriber to the specified publication. Lists subscriptions newest-first; dedup by subscription id.
Trigger
New unsubscriber to publicationPolls Beehiiv and emits each new unsubscriber (inactive subscription) to the specified publication. Dedup by subscription id.
Action
Add subscription tagadd a tag to a subscription.
Action
Bulk create subscriptioncreate multiple subscriptions in a single bulk request.
Action
Create custom fieldcreate a new custom field.
Action
Create newsletter listcreate a new newsletter list.
Action
Create segmentcreate a new segment.
Action
Create subscriptionCreates a new subscriber on a publication. Sets email plus optional custom fields, UTM attribution, and referral source.
Action
Delete custom fielddelete a custom field.
Action
Delete newsletter listdelete a newsletter list.
Action
Delete segmentdelete a segment.
Action
Delete subscriptionRemove a subscriber from a publication.
Action
Get aggregate statsget aggregate statistics across posts.
Action
Get authorget details for a specific author.
Action
Get custom fieldget details for a specific custom field.
Action
Get newsletter listget details for a specific newsletter list.
Action
Get newsletter list subscriptionget details for a newsletter list subscription.
Action
Get postRetrieve a single post by ID. Returns content, stats, and publish status.
Action
Get post templatesget available post templates for a publication.
Action
Get publicationget details for a specific publication.
Action
Get publication engagementsget aggregate engagement stats for a publication.
Action
Get publications by subscription emailget publications associated with a subscriber email.
Action
Get referral programget referral program details for a publication.
Action
Get segmentget details for a specific segment.
Action
Get subscription by emailRetrieve a single subscription by email address. Returns the subscriber's status, tier, and custom fields.
Action
Get subscription by IDget details for a subscription by its ID.
Action
Get subscription updateget a specific bulk subscription update record.
Action
Identify userget current OAuth user info.
Action
Identify workspaceget current workspace info.
Action
List authorslist all authors for a publication.
Action
List complimentary accesslist free access grants for a publication.
Action
List condition setslist all condition sets for a publication.
Action
List custom fieldsList a publication's subscriber custom fields. Returns field names and types for mapping.
Action
List postsList posts for a publication. Returns posts with status, audience, and publish metadata.
Action
List publicationsList the publications on the account. Returns each publication's id, name, and settings — the entry point for resolving a publication id.
Action
List segmentsList segments for a publication. Returns segment ids, names, and types for audience targeting.
Action
List subscriptionsList subscriptions for a publication. Returns subscribers with status, tier, and custom fields, supports filtering/pagination.
Action
List subscription updateslist bulk subscription update records.
Action
Recalculate segmentrecalculate segment membership.
Action
Update a tierupdate an existing tier.
Action
Update custom fieldupdate an existing custom field.
Action
Update subscription by emailUpdate an existing subscriber identified by email. Changes tier, status, or custom fields.
Action
Update subscription by IDupdate a subscription by its ID.
Action
Update subscriptionsupdate multiple subscriptions at once.
Action
Update subscriptions' statusbulk update subscription status.
Trigger
New ClientTriggered when a new client is created in Harpoon.
Trigger
New ContactTriggered when a new contact is created in Harpoon.
Trigger
New ExpenseTriggered when a new expense is created in your Harpoon account.
Trigger
New Expense CategoryTriggered when a new expense category is created in Harpoon.
Trigger
New InvoiceTriggered when a new invoice is created in Harpoon.
Trigger
New PaymentTriggered when a new payment is recorded in your Harpoon account.
Trigger
New ProjectTriggered when a new project is created in Harpoon.
Trigger
New Task CategoryTriggered when a new task category is added in your Harpoon account.
Trigger
New Time EntryTriggered when a new time entry is logged in Harpoon.
Action
Add Credit EntryCreates 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 InvoiceCreates 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 SourceCreates 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 NoteAdds a note to a client, project or invoice in Harpoon. Returns the note that was created.
Action
Add TeamCreates 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 EntryCreates 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 ContactCreates a contact person under a Harpoon client, with their name, email address, and phone number. Returns the contact that was created.
Action
Create ExpenseRecords 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 CategoryCreates a new expense category in your Harpoon account so expenses can be grouped under it.
Action
Create ProjectCreates 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 EntryLogs 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 ClientDeletes a client from your Harpoon account.
Action
Delete ExpensePermanently deletes an expense from your Harpoon account.
Action
Delete InvoicePermanently removes an invoice from Harpoon. Returns Harpoon's confirmation that the invoice was deleted.
Action
Delete NoteDeletes a note from your Harpoon account.
Action
Delete Recurring ExpenseDeletes a recurring expense template from Harpoon by its id, so it stops generating new expenses.
Action
Delete Recurring InvoiceStops 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 EntryDeletes a time entry from your Harpoon account.
Action
Get ClientReturns a single client from your Harpoon account, including its name, contact details and other stored attributes.
Action
Get Client CreditsReturns a client's credit entries in Harpoon, along with the credit still available on the account.
Action
Get ContactReturns a single Harpoon contact, including their name, email address, phone number, and the client they belong to.
Action
Get EstimateReturns a single estimate from your Harpoon account, including its client, line items, totals and status.
Action
Get ExpenseReturns 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 CategoryReturns a single Harpoon expense category with every detail it carries, including its name and budget settings.
Action
Get InvoiceFetches 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 SourceReturns a single lead source from your Harpoon account.
Action
Get ProjectReturns a single project from your Harpoon account, including its client, budget and status.
Action
Get Recurring ExpenseFetches 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 InvoiceReturns a single recurring invoice schedule from Harpoon, including its client, frequency, dates, and line items.
Action
Get TaskReturns a single task category from your Harpoon account, including its name and hourly rate.
Action
Get TeamReturns a single team from your Harpoon account, including its name, email address, phone, address, owner and whether it is active.
Action
Get Time EntryReturns a single tracked time entry from your Harpoon account, including its date, hours, client, project and notes.
Action
List ContactsReturns the contacts in your Harpoon account, including each contact's name, email address and phone number.
Action
List EstimatesReturns the estimates in a Harpoon account, optionally narrowed to a year, client, project, status, or search text.
Action
List Expense CategoriesReturns the expense categories set up in Harpoon, each with its budget settings.
Action
List ExpensesReturns the expenses in your Harpoon account, optionally narrowed by date range, client, project, category, billing status or search text.
Action
List InvoicesReturns the invoices in your Harpoon account, optionally narrowed by year, client, project, status or a search term.
Action
List ProjectsReturns the projects in a Harpoon account, with their client, budget, rate, and dates.
Action
List TeamsReturns the teams in your Harpoon account, along with the total number of teams found.
Action
List Time EntriesReturns 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 ExpenseUpdates an existing expense in your Harpoon account. Only the values you supply are changed.
Action
Update InvoiceUpdates an existing invoice in your Harpoon account. Only the values you supply are changed.
Action
Update ProjectUpdates an existing project in Harpoon — its name, client, billing type, status, dates, budget and task rates. Returns the updated project.
Action
Update Recurring ExpenseUpdates 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 InvoiceUpdates an existing recurring invoice template in your Harpoon account. Only the values you supply are changed.
Action
Update Time EntryUpdates an existing time entry in Harpoon — its date, hours, description, project, task or billing state.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
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Questions
Beehiiv and Harpoon, answered
What can start an automation from Beehiiv?
Any of Beehiiv's 8 triggers in the catalog, including New subscriber to publication, New unsubscriber to publication, List automations and List newsletter lists. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Harpoon when something happens in Beehiiv?
Any of Harpoon's 46 actions, including Create Contact, Create Expense, Create Expense Category and Create Project. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Harpoon to Beehiiv?
Yes. When something happens in Harpoon, your agent can act in Beehiiv too. This page covers both directions: Harpoon's triggers and Beehiiv's actions are listed here as well.
Do I have to build a connector for Beehiiv or Harpoon?
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 Beehiiv and Harpoon 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.