Integration
Connect BigMailer and Harpoon
When New Contact fires in BigMailer, your agent runs Create Contact in Harpoon, or New Client in Harpoon to Add/Update Contact in BigMailer. 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 BigMailer 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 BigMailer and Harpoon can do together
From BigMailer to Harpoon
When New Contact in BigMailer
then Create Contact in Harpoon
When New Contact in BigMailer
then Add Invoice in Harpoon
From Harpoon to BigMailer
When New Client in Harpoon
then Add/Update Contact in BigMailer
When New Contact in Harpoon
then Create a bulk campaign in BigMailer
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 BigMailer and Harpoon
Triggers and actions 10 triggers · 81 actions
Trigger
New ContactTriggered when a new contact is created in a BigMailer brand.
Action
Add/Update ContactCreates a BigMailer contact, or updates the existing contact with that email address. Custom fields for the selected brand can be mapped alongside list membership and unsubscribe settings.
Action
Create a bulk campaignCreates a bulk email campaign in a BigMailer brand — name, subject, sender, content, recipient lists, tracking and optional schedule.
Action
Create an RSS campaignCreates an RSS-to-email campaign in a BigMailer brand: watches a feed URL and emails new items on the schedule you choose.
Action
Create a transactional campaignCreates a transactional campaign in a BigMailer brand — the reusable email template and settings you later send one-off emails with.
Action
Create listCreates a new contact list inside a BigMailer brand.
Action
Create segmentCreates a segment in a BigMailer brand: a saved set of conditions that picks out the contacts you want to target.
Action
Create templateCreates a reusable email or landing-page template in a BigMailer brand.
Action
Delete contactDeletes a contact from a BigMailer brand, by contact ID or email address.
Action
Delete listDeletes a contact list from a BigMailer brand.
Action
Delete segmentDeletes a segment from a BigMailer brand.
Action
Delete templateDeletes a template from a BigMailer brand.
Action
Get brandReturns one BigMailer brand: its name, default sender, bounce settings, contact count and engagement stats.
Action
Get bulk campaignReturns one bulk campaign from a BigMailer brand, including its content, recipients and send statistics.
Action
Get contactReturns one BigMailer contact by ID or email address, including its custom field values.
Action
Get listReturns one contact list from a BigMailer brand.
Action
Get RSS campaignReturns one RSS campaign from a BigMailer brand, including its feed URL, schedule and content.
Action
Get segmentReturns one segment from a BigMailer brand, including the conditions that define it.
Action
Get templateReturns one template from a BigMailer brand, including its HTML.
Action
Get transactional campaignReturns one transactional campaign from a BigMailer brand, including its content and send statistics.
Action
List brandsLists the brands in your BigMailer account.
Action
List bulk campaignsLists the bulk campaigns in a BigMailer brand.
Action
List contactsLists the contacts in a BigMailer brand, optionally limited to one list.
Action
List listsLists the contact lists in a BigMailer brand.
Action
List RSS campaignsLists the RSS campaigns in a BigMailer brand.
Action
List segmentsLists the segments in a BigMailer brand.
Action
List sendersLists the sending identities in a BigMailer brand.
Action
List templatesLists the templates in a BigMailer brand.
Action
List transactional campaignsLists the transactional campaigns in a BigMailer brand.
Action
Update a bulk campaignUpdates an existing bulk campaign in a BigMailer brand. Only the fields you fill in are changed.
Action
Update an RSS campaignUpdates an existing RSS campaign in a BigMailer brand. Only the fields you fill in are changed.
Action
Update a transactional campaignUpdates an existing transactional campaign in a BigMailer brand. Only the fields you fill in are changed.
Action
Update brandUpdates an existing BigMailer brand — its name, default sender name and email, website URL, unsubscribe text, bounce thresholds, contact limit and logo. Only the fields you fill in are changed.
Action
Update listRenames an existing contact list inside a BigMailer brand.
Action
Update segmentUpdates an existing BigMailer segment — its name, match operator (all/any) and its list of conditions. Only the fields you fill in are changed.
Action
Update templateUpdates an existing BigMailer template — its name, type, HTML content and account-wide sharing. Only the fields you fill in are changed.
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.
Each app on its own
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Questions
BigMailer and Harpoon, answered
What can start an automation from BigMailer?
Any of BigMailer's 1 trigger in the catalog, including New Contact. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Harpoon when something happens in BigMailer?
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 BigMailer?
Yes. When something happens in Harpoon, your agent can act in BigMailer too. This page covers both directions: Harpoon's triggers and BigMailer's actions are listed here as well.
Do I have to build a connector for BigMailer 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 BigMailer 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.