Integration
Connect Harpoon and Slack
When New Client fires in Harpoon, your agent runs Send Direct Message in Slack, or New Channel in Slack 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 Slack 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 Slack can do together
From Harpoon to Slack
When New Client in Harpoon
then Send Direct Message in Slack
From Slack 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 Slack
Triggers and actions 24 triggers · 106 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 Channel
Triggers when a new channel is created in the workspace.
- New Channel (instant)
Triggers when a new channel is created (Slack event channel_created).
- New Channel Member
Triggers when a member joins a chosen channel (Slack event member_joined_channel).
- New File (instant)
Triggers when a new file is uploaded to the workspace (Slack event file_created).
- New Mention (instant)
Triggers when a username or keyword is mentioned in a channel. Events API message events with keyword filter.
- New Message Posted to Channel
Triggers when a message is posted to a chosen channel (Slack event message.channels).
- New Message Posted to Private Channel
Triggers when a message is posted to a chosen private channel or group DM (Slack events message.groups, message.mpim).
- New Pinned Item
Triggers when an item is pinned in a channel.
- New Public Message Posted Anywhere
Triggers when a message is posted to any public channel (Slack event message.channels).
- New Reaction Added
Triggers when an emoji reaction is added to a message (Slack event reaction_added).
- New Saved Message
Triggers when a message or file is saved (starred) (Slack event star_added).
- New Team Custom Emoji
Triggers when a custom emoji is added to the workspace (Slack event emoji_changed).
- New Thread Reply
Triggers when a new reply is added to a message thread.
- New User
Triggers when a new user joins the workspace. Polling; deduped by user id.
- New User (instant)
Triggers when a new user joins the workspace (Slack event team_join).
- Add Bookmark
Add a bookmark to a channel.
- Add Reaction
Add an emoji reaction to a message.
- Add Star
Save a message or file by starring it.
- Archive Channel
Archive a channel.
- Complete Reminder
Mark a reminder as complete.
- Create Canvas
Create a standalone canvas document.
- Create Channel
Create a new public or private channel.
- Create Channel Canvas
Create a canvas attached to a channel.
- Create Reminder
Create a reminder for a user at a specified time.
- Delete Canvas
Delete a canvas.
- Delete File
Delete a file from the workspace.
- Delete Message
Delete a message from a channel by timestamp.
- Delete Reminder
Delete a reminder.
- Delete Scheduled Message
Cancel a scheduled message before it is sent.
- Edit Bookmark
Edit an existing channel bookmark.
- Edit Canvas
Edit the content of a canvas.
- Find Channel by Name
List channels filtered to locate a channel by name (client filters the returned list).
- Find User by Email
Look up a Slack user by their email address.
- Get Channel Messages
Fetch the message history of a channel.
- Get File Info
Get information about a file.
- Get Message Permalink
Get a permanent link to a specific message.
- Get Message Reactions
Get the emoji reactions on a message.
- Get Team Info
Get information about the workspace.
- Get Thread Replies
Get the replies in a message thread.
- Get User Info
Get profile information for a Slack user by ID.
- Get User Presence
Get a user's current presence status.
- Get User Profile
Get a user's profile fields.
- Invite User to Channel
Invite one or more users to a channel (comma-separated user IDs).
- Join Channel
Join a public channel.
- Leave Channel
Leave a channel.
- List Bookmarks
List the bookmarks in a channel.
- List Channel Members
List the members of a channel.
- List Channels
List channels in the workspace (public and private).
- List Custom Emojis
List the workspace's custom emojis.
- List Files
List files in the workspace, optionally filtered by channel or user.
- List Pinned Items
List the items pinned in a channel.
- List Scheduled Messages
List messages scheduled to be sent later.
- List User Groups
List the workspace's user groups.
- List Users
List all users in the workspace.
- List User's Channels
List the channels a user is a member of.
- Mark Channel Read
Set the read cursor position in a channel.
- Pin Message
Pin a message to a channel.
- Remove Bookmark
Remove a bookmark from a channel.
- Remove Reaction
Remove an emoji reaction from a message.
- Remove Star
Remove a star from a message or file.
- Remove User from Channel
Remove a member from a channel.
- Rename Channel
Rename a channel.
- Schedule Message
Schedule a message to be sent to a channel at a future Unix time.
- Search Files
Search files across the workspace.
- Search Messages
Search messages across the workspace.
- Send Direct Message
Open a DM with a user and post a message to it.
- Send Ephemeral Message
Send a message in a channel that is visible only to one user.
- Send Message
Post a message to a channel, private group, or DM.
- Set Channel Purpose
Set the purpose (description) for a channel.
- Set Channel Topic
Set the topic for a channel.
- Set User Presence
Set the authenticated user's presence status.
- Unarchive Channel
Restore an archived channel.
- Unpin Message
Remove a pinned message from a channel.
- Update Message
Update an existing message in a channel by timestamp.
- Upload File
Upload a file and share it to one or more channels.
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 Slack, 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 Slack when something happens in Harpoon?
Any of Slack's 60 actions, including Create Canvas, Create Channel, Create Channel Canvas and Create Reminder. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Slack to Harpoon?
Yes. When something happens in Slack, your agent can act in Harpoon too. This page covers both directions: Slack's triggers and Harpoon's actions are listed here as well.
Do I have to build a connector for Harpoon or Slack?
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 Slack 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.