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What do you want MailUp and Shift4 to do together?
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https://mcp.apiant.aiAny client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
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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 MailUp can start in Shift4
When New Email Message in List in MailUp
then Add card in Shift4
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 MailUp and Shift4
Triggers and actions 4 triggers · 46 actions
- New Email Message in List
A new email message was created in the list. MailUp is a multi-list environment and messages are list-specific.
- New Group
New group added to the specified list. MailUp is a multi-list environment and groups are list-specific.
- New Recipient Subscribed
There is a new subscriber in the specified list. MailUp is a multi-list environment.
- New Recipient Unsubscribed
A recipient unsubscribed from the specified list. MailUp is a multi-list environment.
- Add list
Create a new list. POST Console/List
- Add Recipient to Group
Add recipient to the specified group on the list.
- Add Recipient to List
Adds a new recipient to the specified list as a subscriber.
- Create New Email Message
Create a new email message on the specified list.
- Create New Group
Add a new group to the specified list. MailUp is a multi-list environment.
- Delete email message
Delete an email message. DELETE Console/List/{id_List}/Email/{id_Message}
- Delete group
Delete a group in a list. DELETE Console/List/{id_List}/Group/{id_Group}
- Delete list
Delete a list. DELETE Console/List/{id_List}
- Get email message
Retrieve email message details. GET Console/List/{id_List}/Email/{id_Message}
- Get list
Retrieve list details by id. GET Console/List/{id_List}
- List email messages
Retrieve email messages of a list. GET Console/List/{id_List}/Emails
- List Email Message Sendings
lists the sendings (send tasks, with recipients count and status) created for an email message.
- List Group Recipients
Lists the recipients in a MailUp group (GET Console/Group/{id_group}/Recipients), with id, email, name and personal data fields.
- List groups
Retrieve groups of a list. GET Console/List/{id_List}/Groups
- List lists
Retrieve the console's lists. GET Console/List on services.mailup.com/API/v1.1/Rest/ConsoleService.svc
- List subscribed recipients
Retrieve subscribed recipients of a list. GET Console/List/{id_List}/Recipients/Subscribed
- Remove recipient from group
Unsubscribe a recipient from a group. DELETE Console/Group/{id_Group}/Unsubscribe/{id_Recipient}
- Remove Recipient From List
This method unsubscribe the given recipient from the specified list.
- Send Message to Email Address
Sends the specified message (previously created in MailUp in the specified List) to the email address specified.
- Send Message to Group
Send a message to a predefined group in the specified list.
- Send message to list
Send an email message to all recipients of a list. POST Console/List/{id_List}/Email/{id_Message}/Send
- Unsubscribe recipient from list
Unsubscribe a recipient from a list. DELETE Console/List/{id_List}/Unsubscribe/{id_Recipient}
- Update email message
Modify an email message. PUT Console/List/{id_List}/Email/{id_Message}
- Update group
Modify a group in a list. PUT Console/List/{id_List}/Group/{id_Group}
- Update list
Modify details of a list. PUT Console/List/{id_List}
- Add card
Saves a credit or debit card to an existing Shift4 customer, either from a card token / successful charge, or from full card details.
- Add charge
Creates a new charge to a customer or card.
- Add customer
Creates a new customer in Shift4, optionally saving a card to them as their default card.
- Add plan
Creates a new subscription plan that customers can be subscribed to.
- Add refund
Refunds an existing charge in full or in part, returning the funds to the card that was charged.
- Add subscription
Creates a subscription that bills a customer automatically according to a plan.
- Delete card
Deletes a saved card from a Shift4 customer. If the deleted card was the customer's default, the most recently added card becomes the new default.
- Delete customer
Deletes an existing Shift4 customer.
- Delete plan
Deletes a plan by ID.
- Delete subscription
Cancels/deletes an existing subscription by ID.
- Get charge
Fetches a charge by ID.
- Get customer
Fetches a customer by ID.
- Get dispute
Fetches a dispute by ID.
- Get plan
Fetches a plan by ID.
- Get refund
Retrieves an existing Shift4 refund by its id.
- Get subscription
Fetches a subscription by ID.
- List cards
Lists the saved cards of a Shift4 customer, most recently created first.
- List refunds
Returns all refunds.
- Update charge
Updates an existing Shift4 charge's customer, description, shipping, billing, fraud status or metadata. Fields left blank are unchanged.
- Update customer
Updates an existing Shift4 customer. Any field left blank is left unchanged.
- Update subscription
Updates an existing subscription. Any field left blank is left unchanged.
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
MailUp and Shift4, answered
What can start an automation from MailUp?
Any of MailUp's 4 triggers in the catalog, including New Email Message in List, New Group, New Recipient Subscribed and New Recipient Unsubscribed. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Shift4 when something happens in MailUp?
Any of Shift4's 21 actions, including Update charge, Update customer, Update subscription and Add card. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Shift4 to MailUp?
Shift4 has no triggers in the catalog today, so automations start in MailUp. If you need the other direction, ask: your agent reads Shift4's API documentation and adds it.
Do I have to build a connector for MailUp or Shift4?
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.
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.