Integration
Connect Harpoon and Loop Returns
When New Client fires in Harpoon, your agent runs Create Allowlist Item in Loop Returns, or New Return Created in Loop Returns 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 Loop Returns to do together?
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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 Loop Returns can do together
From Harpoon to Loop Returns
When New Client in Harpoon
then Create Allowlist Item in Loop Returns
When New Contact in Harpoon
then Create Blocklist Item in Loop Returns
From Loop Returns to Harpoon
When New Return Created in Loop Returns
then Add Invoice in Harpoon
When Return Status Updated in Loop Returns
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 Loop Returns
Triggers and actions 11 triggers · 128 actions
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.
Trigger
New Return CreatedTriggers when a new return is created in Loop.
Trigger
Return Status UpdatedTriggers when a Loop return changes state (for example open to closed or cancelled).
Action
Add Product to CollectionAttach a product to a collection.
Action
Add Product to Collection by External IDAttach a product to a collection by commerce `external_id`.
Action
Advanced Shipping NoticeThis endpoint will pull all packages by tracking statuses/timeframe. The ASN endpoint will return an array of
Action
Cancel Draft ReturnCancel a draft return.
Action
Cancel ReturnCancel a return in Loop. Canceling a return will allow a customer to make another return with the same
Action
Close ReturnClose a return. Closing a return will not fulfill any outcomes such as exchanges or gift cards, and the
Action
Create Allowlist ItemCreate an allowlist entry.
Action
Create Blocklist ItemCreate a blocklist entry.
Action
Create Bulk OperationUploads a JSONL file of order, product or other jobs and starts a Loop bulk operation that runs them.
Action
Create DestinationCreate a destination.
Action
Create Fraud ReportAttach a fraud report to a return.
Action
Create Return NotePost a new note to a return.
Action
Delete Allowlist ItemDelete an allowlist entry.
Action
Delete Blocklist ItemDelete a blocklist entry.
Action
Delete CollectionDelete a collection.
Action
Delete Collection by External IDDelete a collection by its commerce `external_id`.
Action
Delete CustomerDelete a customer.
Action
Delete Customer by External IDDelete a customer by its commerce `external_id`.
Action
Delete DestinationDelete a destination.
Action
Delete InventoryDelete an inventory.
Action
Delete Inventory by External IDsDelete an inventory record identified by the product variant's `external_id` and the location's `external_id`. If more than one product variant in the shop shares the same `external_id`, this request returns `409 Conflict`.
Action
Delete LocationDelete a location.
Action
Delete Location by External IDDelete a location by its commerce `external_id`.
Action
Delete OrderDelete a specific order.
Action
Delete Order by External IDDelete a specific order by its commerce `external_id`.
Action
Delete Product by External IDDelete a product by its commerce `external_id`.
Action
Delete Product from CollectionDelete a product from a collection.
Action
Delete Product from Collection by External IDDelete a product from a collection by commerce `external_id`.
Action
Delete Product VariantDelete a product variant.
Action
Delete Product Variant by External IDDelete a product variant by the parent product's commerce `external_id` and the variant's commerce `external_id`.
Action
Detailed Returns ListPull a detailed list of returns created within a given timeframe.
Action
Finalize ItemsFinalizes the returning items and cart items of the draft return.
Action
Flag ReturnFlag a return in Loop for review. This will prevent automated processing and will require a human to go
Action
Get All DestinationsRetrieve all destinations.
Action
Get Allowlist ItemRetrieve an allowlist entry.
Action
Get Blocklist ItemRetrieve a blocklist entry.
Action
Get Bulk OperationGet the details about a specific bulk operation.
Action
Get CollectionGet details about a single collection.
Action
Get Collection by External IDGet details about a single collection by its commerce `external_id`.
Action
Get CustomerGet details about a single customer.
Action
Get Customer by External IDGet details about a single customer by its commerce `external_id`.
Action
Get Destination DetailsGet details for a single destination.
Action
Get Draft ReturnRetrieves the details of a draft return, including its current state, returning items, cart items, and
Action
Get InventoryGet inventory details for a product variant by location.
Action
Get Inventory by External IDsGet inventory details for a product variant at a location, identified by the variant's `external_id` and the location's `external_id`. If more than one product variant in the shop shares the same `external_id`, this request returns `409 Conflict`.
Action
Get LocationGet the details about a single location.
Action
Get Location by External IDGet the details about a single location by its commerce `external_id`.
Action
Get OrderGet details about a specific order.
Action
Get Order by External IDGet details about a specific order by its commerce `external_id`.
Action
Get Product by External IDGet the details about a single product by its commerce `external_id`.
Action
Get Product VariantGet the details about a single product variant.
Action
Get Product Variant by External IDGet the details about a single product variant by the parent product's commerce `external_id` and the variant's commerce `external_id`.
Action
Get Return DetailsGet the details of a specific return based on a return's ID,
Action
Get Return NotesGet notes on a specific return using the return's ID.
Action
Get Shipment InformationGet high level information from a Happy Returns shipment.
Action
Get Shipment ItemsGet all items for a Happy Returns shipment.
Action
Get ShipmentsGet information about all Happy Returns shipments created within a given timeframe.
Action
List Allowlist ItemsRetrieve a list of paginated allowlist entries.
Action
List Blocklist ItemsRetrieve a list of paginated blocklist entries.
Action
List Bulk Operation JobsRetrieve a list of bulk operation jobs.
Action
List Bulk OperationsRetrieve a list of bulk operations. The list can be sorted and paginated using the parameters below.
Action
List CollectionsRetrieve a list of collections. The list can be filtered, sorted, and paginated using the parameters below.
Action
List CustomersRetrieve a list of customers. The list can be filtered, sorted, and paginated using the parameters below.
Action
List InventoriesRetrieve a list of inventories. The list can be filtered, sorted, and paginated using the parameters below.
Action
List LocationsRetrieve a list of locations. The list can be filtered, sorted, and paginated using the parameters below.
Action
List OrdersList all orders.
Action
List ProductsRetrieve a list of products. The list can be filtered, sorted, and paginated using the body parameters below.
Action
List Product VariantsRetrieve a list of product variants. The list can be filtered, sorted, and paginated using the body parameters below.
Action
Look Up Order Return Eligibility by Order NameReport per-line-item return eligibility for an order, by its order name, without starting a return.
Action
Process ReturnProcess a return in Loop based on the return ID. Processing a return will archive it in Loop and
Action
Remove Cart ItemRemoves a specific item from the draft return's cart.
Action
Remove Line ItemsRemove one or more line items from an open return.
Action
Remove Returning ItemRemoves a specific item from the draft return's ReturningItems.
Action
Set AddressSets the return shipping address for the draft return.
Action
Set Credit TypeSets the credit type for the draft return.
Action
Set CustomerSets the customer information for the draft return.
Action
Set Processing TypeSets the processing type (`regular` or `instant`) of the draft return.
Action
Set Returning Item Return TypeSets the return type for a specific returning item.
Action
Submit Draft ReturnSubmits the draft return.
Action
Unfinalize ItemsReopens the returning items and cart items of the draft return for modification.
Action
Update DestinationUpdate a destination.
Action
Upsert InventoryUpsert inventory details for a product variant by location. If the inventory exists, it will be updated; if it doesn't exist, it will be created.
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
Harpoon and Loop Returns, 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 Loop Returns when something happens in Harpoon?
Any of Loop Returns's 82 actions, including Create Allowlist Item, Create Blocklist Item, Create Bulk Operation and Create Destination. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Loop Returns to Harpoon?
Yes. When something happens in Loop Returns, your agent can act in Harpoon too. This page covers both directions: Loop Returns's triggers and Harpoon's actions are listed here as well.
Do I have to build a connector for Harpoon or Loop Returns?
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 Loop Returns 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.