Integration
Connect FreeAgent and Harpoon
When New Bank Transaction fires in FreeAgent, your agent runs Add Invoice in Harpoon, or New Client in Harpoon to Create Contact in FreeAgent. 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 FreeAgent 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 FreeAgent and Harpoon can do together
From FreeAgent to Harpoon
When New Bank Transaction in FreeAgent
then Add Invoice in Harpoon
When New Contact in FreeAgent
then Create Contact in Harpoon
From Harpoon to FreeAgent
When New Client in Harpoon
then Create Contact in FreeAgent
When New Contact in Harpoon
then Create Invoice in FreeAgent
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 FreeAgent and Harpoon
Triggers and actions 15 triggers · 96 actions
Trigger
New Bank TransactionTriggers when a new transaction appears in a FreeAgent bank account.
Trigger
New ContactTriggers when a new contact is created.
Trigger
New InvoiceTriggers when a new invoice is created.
Trigger
New or Updated ContactTriggers when a contact is created or changed in FreeAgent.
Trigger
New or Updated TimeslipTriggers when a timeslip (time entry) is created or edited in FreeAgent.
Trigger
New ProjectTriggers when a new project is created.
Action
Convert Estimate to InvoiceConverts an estimate into an invoice, marking the estimate as Invoiced and returning the URL of the new invoice.
Action
Create BillCreates a bill from a supplier contact in FreeAgent, with its line items, and returns the new bill.
Action
Create ContactCreate a new contact.
Action
Create Credit NoteCreates a draft credit note for a FreeAgent contact, with optional line items.
Action
Create EstimateCreates a new estimate, quote or proposal in FreeAgent for a contact or project, optionally with line items.
Action
Create ExpenseCreates an expense claim in FreeAgent for a user, with its category, date, amount and sales tax details.
Action
Create InvoiceCreate an invoice for a contact.
Action
Create Mileage ClaimCreates a mileage claim (a mileage expense) for a user in FreeAgent and returns the new claim.
Action
Create NoteAdds a note to a FreeAgent contact or project.
Action
Create Price List ItemCreates a price list item in FreeAgent that can be added to invoices and estimates.
Action
Create ProjectCreate a project for a contact.
Action
Create TaskCreates a task under a FreeAgent project.
Action
Create TimeslipCreate a timeslip (time tracking entry).
Action
Delete ContactDelete a contact by id.
Action
Delete InvoiceDeletes an invoice from FreeAgent.
Action
Delete TimeslipDeletes a timeslip from FreeAgent.
Action
Explain Bank TransactionExplains a bank transaction in FreeAgent by creating a bank transaction explanation (categorising it, or matching it to an invoice, bill, transfer or user payment). Returns the created explanation.
Action
Find Contact by EmailFinds FreeAgent contacts whose email or billing email matches the given address.
Action
Get BillReturns a single bill, including its line items, by its ID.
Action
Get ContactGet a single contact by id.
Action
Get Credit NoteReturns a single FreeAgent credit note, including its line items, status and totals.
Action
Get EstimateReturns a single FreeAgent estimate with its line items.
Action
Get ExpenseReturns a single FreeAgent expense by its ID, including amounts, category, claimant and attachment details.
Action
Get InvoiceGet a single invoice by id.
Action
Get NoteReturns a single note attached to a FreeAgent contact or project, including its text, author and timestamps.
Action
Get Price List ItemReturns a single price list item from FreeAgent by its ID.
Action
Get ProjectReturns a single FreeAgent project by its ID, including its contact, status, budget and billing details.
Action
Get TimeslipReturns a single FreeAgent timeslip, including its hours, date, user, project and task.
Action
List Bank AccountsReturns the bank accounts in your FreeAgent company, optionally filtered to standard, credit card or PayPal accounts.
Action
List Bank TransactionsReturns the bank transactions in a FreeAgent bank account, optionally filtered by date range, last update time, or explanation status.
Action
List BillsList bills.
Action
List CategoriesReturns all accounting categories for the company, grouped into admin expenses, cost of sales, income and general categories, optionally including sub accounts.
Action
List ContactsList contacts in FreeAgent.
Action
List Corporation Tax ReturnsReturns the company's Corporation Tax Returns, including amount due, payment and filing deadlines, and filing/payment status.
Action
List EstimatesList estimates.
Action
List ExpensesList expenses.
Action
List InvoicesList invoices.
Action
List ProjectsList projects.
Action
List Self Assessment ReturnsReturns the Self Assessment (income tax) returns for a FreeAgent user, including payments due and filing status.
Action
List TasksReturns the tasks in your FreeAgent account, optionally filtered by status, project or last-updated date.
Action
List TimeslipsList timeslips (time tracking entries).
Action
List UsersReturns the users on the FreeAgent account, optionally filtered to staff or advisors.
Action
Mark Invoice as CancelledMarks a FreeAgent invoice as cancelled, writing it off as unpaid. The invoice must be sent and past its due date.
Action
Mark Invoice as SentMarks a FreeAgent invoice as sent without emailing it. Can also re-open a cancelled invoice.
Action
Update BillUpdates an existing bill in FreeAgent — its supplier, reference, dates, rebilling, recurrence and bill items. Only the values you supply are changed.
Action
Update ContactUpdate an existing contact.
Action
Update ExpenseUpdates an existing expense in FreeAgent, changing only the details you supply.
Action
Update InvoiceUpdates an existing FreeAgent invoice's details, such as dates, contact, payment terms, comments and line items. Only the fields you fill in are changed.
Action
Update ProjectUpdates an existing FreeAgent project's name, client, status, budget, billing rate and dates. Only the fields you fill in are changed.
Action
Update TimeslipUpdates an existing timeslip in FreeAgent, changing its task, user, project, date, hours or comment. Fields left blank are not 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
FreeAgent and Harpoon, answered
What can start an automation from FreeAgent?
Any of FreeAgent's 6 triggers in the catalog, including New Bank Transaction, New Contact, New Invoice and New or Updated 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 FreeAgent?
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 FreeAgent?
Yes. When something happens in Harpoon, your agent can act in FreeAgent too. This page covers both directions: Harpoon's triggers and FreeAgent's actions are listed here as well.
Do I have to build a connector for FreeAgent 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 FreeAgent 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.