Integration
Connect ActiveCampaign Postmark to OnceOnly
When New Bounce fires in ActiveCampaign Postmark, your agent runs Add event in OnceOnly. 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 ActiveCampaign Postmark and OnceOnly 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 ActiveCampaign Postmark can start in OnceOnly
When New Bounce in ActiveCampaign Postmark
then Add event in OnceOnly
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 ActiveCampaign Postmark and OnceOnly
Triggers and actions 6 triggers · 24 actions
- New Bounce
Triggers when an email sent through Postmark bounces.
- New Delivery
Triggers when Postmark confirms an email was accepted by a recipient's mail server (one event per recipient).
- New Email Open
Triggers when a recipient opens an email sent through Postmark with open tracking enabled.
- New Inbound Message
Triggers when an email arrives at the server's inbound address and Postmark parses it.
- New Link Click
Triggers when a recipient clicks a tracked link in an email for the first time.
- New Spam Complaint
Triggers when a recipient marks an email sent through Postmark as spam.
- Activate bounce
Reactivates an email address that Postmark deactivated because of a bounce, so it can receive email again.
- Add template
Creates a new email template (standard or layout) on your Postmark server.
- Delete template
Deletes an email template from your Postmark server by its ID or alias.
- Find bounces by criteria
Returns bounces on your Postmark server matching criteria such as bounce type, email address, tag, message, stream, or date range.
- Find outbound messages by criteria
Searches outbound email messages sent through your Postmark server by recipient, sender, tag, status, subject, date range or message stream. Returns up to 500 matching messages.
- Get bounce
Returns the details of a single bounce, including the bounced email address, bounce type, and whether the address can be reactivated.
- Get outbound message
Returns the full details of one sent email, including its bodies, recipients, status, metadata and delivery events.
- Get template
Returns a single email template, including its subject, HTML and text content, by its ID or alias.
- List templates
Returns the email templates on your Postmark server, optionally filtered by template type or layout.
- Send an Email
Sends a single email through your Postmark server.
- Send batch emails
Sends up to 500 emails in a single request and returns Postmark's per-message result for each.
- Send Email With Template
Sends an email rendered from one of your Postmark templates, filling it with the values you supply.
- Update template
Updates an existing Postmark template's name, subject, HTML or text content, alias, or layout.
- Add event
Adds an event to an agent run's timeline in OnceOnly, such as a step starting, a tool call, or a failure.
- Add policy
Creates or updates the governance policy for an agent, such as rate limits, spend limits and allowed or blocked tools.
- Add tool
Creates or updates a tool in your OnceOnly tool registry, pointing at your backend URL. Returns the saved tool without its secret.
- Check & Lock
Checks an idempotency key and locks it if it is new, telling you whether the event is a first occurrence or a duplicate.
- Delete tool
Permanently deletes a tool from your OnceOnly tool registry.
- Get policy
Returns the governance policy configured for an agent.
- Get run
Returns a run's timeline: the run id, the total number of events and the list of events recorded for it.
- Get tool
Returns the details of a registered tool by name, including its URL, scope, enabled state and retry settings.
- List policies
Returns every agent policy on the OnceOnly account, each with its agent id and policy settings.
- List runs
Returns the runs recorded on your OnceOnly account, with each run's latest status and event count.
- List tools
Returns the tools registered in your OnceOnly tool registry for a scope.
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
ActiveCampaign Postmark and OnceOnly, answered
What can start an automation from ActiveCampaign Postmark?
Any of ActiveCampaign Postmark's 6 triggers in the catalog, including New Bounce, New Delivery, New Email Open and New Inbound Message. Describe the moment in plain language and your agent picks the right one.
What can your agent do in OnceOnly when something happens in ActiveCampaign Postmark?
Any of OnceOnly's 11 actions, including Add event, Add policy, Add tool and Check & Lock. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from OnceOnly to ActiveCampaign Postmark?
OnceOnly has no triggers in the catalog today, so automations start in ActiveCampaign Postmark. If you need the other direction, ask: your agent reads OnceOnly's API documentation and adds it.
Do I have to build a connector for ActiveCampaign Postmark or OnceOnly?
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 ActiveCampaign Postmark and OnceOnly 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.