Integration
Connect PostStack to Synthflow AI
When Contact Updated (instant) fires in PostStack, your agent runs Create Assistant in Synthflow AI. 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 PostStack and Synthflow AI 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 PostStack can start in Synthflow AI
When Contact Updated (instant) in PostStack
then Create Assistant in Synthflow AI
When New Contact (instant) in PostStack
then Create Booking Calcom Action in Synthflow AI
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 PostStack and Synthflow AI
Triggers and actions 7 triggers · 56 actions
Trigger
Contact Deleted (instant)Fires when a contact is deleted (event: contact.deleted).
Trigger
Contact Updated (instant)Fires when a contact is updated (event: contact.updated).
Trigger
Email Bounced (instant)Fires when an email bounces (event: email.bounced).
Trigger
Email Delivered (instant)Fires when an email is delivered (event: email.delivered).
Trigger
New Contact (instant)Fires when a contact is created (event: contact.created).
Trigger
New Inbound EmailPolls for newly received inbound emails.
Trigger
New Sent Email (instant)Fires when an email is sent (event: email.sent).
Action
Add a broadcastCreate a new marketing broadcast.
Action
Add a contactCreate a new contact.
Action
Add a segmentCreate a new manual contact segment.
Action
Add a templateCreate a new email template.
Action
Add contacts to segmentAdd contacts to an existing segment.
Action
Add suppressionAdd an address to the suppression list.
Action
Cancel broadcastCancel an in-flight broadcast.
Action
Cancel emailCancel a scheduled or queued email before it sends.
Action
Delete a contactDelete a contact.
Action
Delete a templateDelete an email template.
Action
Get a contactFetch one contact by ID.
Action
Get a templateFetch one email template by ID.
Action
Get broadcastRetrieve one broadcast by its public id, including the HTML and text bodies that the list endpoint omits.
Action
Get emailFetch one sent or queued email by ID.
Action
Get email eventsGet the delivery event timeline for one email.
Action
Get inbound emailFetch one received inbound email by ID.
Action
Import contactsBulk-import a CSV list of contacts.
Action
List broadcastsList marketing broadcasts.
Action
List contactsList contacts in the account.
Action
List emailsList sent, queued, and scheduled emails.
Action
List inbound emailsList emails received via inbound parsing.
Action
List segmentsList contact segments.
Action
List suppressed addressesList addresses on the suppression list.
Action
List templatesList email templates.
Action
Send an emailSend a transactional email through PostStack.
Action
Send broadcastStart sending a broadcast to its recipients.
Action
Send emails in batchSend up to 100 emails in a single request.
Action
Update a contactUpdate an existing contact's fields.
Action
Update a templateUpdate an email template, creating a new version.
Action
Update emailReschedule a queued email's send time.
Action
Validate email addressCheck whether an email address is valid and deliverable.
Action
Attach ActionAttaches one or more existing actions to a Synthflow agent, optionally setting when each action runs and how its input variables are filled.
Action
Create AssistantCreates a new Synthflow voice agent with its prompt, voice, language and call behavior, and returns the new agent's ID.
Action
Create Booking Calcom ActionCreates a real-time booking action that lets a Synthflow agent offer and book Cal.com appointments during a call.
Action
Create Booking GHL ActionCreates a real-time booking action that lets a Synthflow agent book appointments on a GoHighLevel calendar during a call.
Action
Create CallPlaces a real-time outbound phone call from a Synthflow AI agent to the recipient you specify, and returns the new call's ID.
Action
Create Information Extractor Open Question ActionCreates an information extractor action that has a Synthflow agent capture a free-form answer from a call. Returns the new action's ID, ready to attach to an agent.
Action
Create Information Extractor Single Choice ActionCreates an information extractor action that has the agent pick one answer from a list of choices during a call. Returns the new action's ID.
Action
Create Information Extractor Yes No ActionCreates a yes/no information extractor action, which pulls a yes or no answer out of a call conversation.
Action
Create SMS ActionCreates a Send SMS action that an agent can use to text a message during a call, and returns the new action's ID.
Action
Create Transfer Call ActionCreates a live transfer action that a Synthflow agent can use to hand a call over to a phone number, SIP target or phone book.
Action
Delete ActionDeletes an action from your Synthflow account by its ID.
Action
Delete AssistantDeletes a Synthflow agent (assistant) by its ID.
Action
Detach ActionDetaches one or more actions from a Synthflow agent so the agent can no longer use them.
Action
Get ActionReturns the details of a Synthflow action, including its type, name, description and configured settings. Can also list the agents the action is assigned to.
Action
Get AssistantReturns one Synthflow agent by its ID, including its voice, prompt and call settings and its attached phone numbers.
Action
Get CallReturns a phone call's transcript, status, duration, executed actions and other details. An error occurs if the call is not found.
Action
List ActionsReturns all actions in the Synthflow AI account, including each action's type, name, description and configuration.
Action
Text - Generate ResponseSends a text message to an agent in an existing chat session and returns the response the agent generates.
Action
Update AssistantUpdates an existing agent's name, phone number, voice, prompt or other settings. Only the values provided are changed.
Action
Update Booking Calcom ActionUpdates a real-time booking action that schedules appointments through Cal.com, including its availability window, meeting type and SMS confirmation. Returns the ID of the updated action.
Action
Update Booking GHL ActionUpdates a real-time booking action that books appointments through a GoHighLevel calendar, including its scheduling settings, confirmation mode and title. Returns the ID of the updated action.
Action
Update Information Extractor Open Question ActionUpdates an open-question information extractor action in Synthflow, changing its title, description or example answers. Anything left blank keeps its current value.
Action
Update Information Extractor Single Choice ActionUpdates the title, description, answer choices or examples of a single-choice information extractor action. Anything left blank keeps its current value.
Action
Update Information Extractor Yes No ActionUpdates the title, description or example answers of a yes/no information extractor action in Synthflow. Anything left blank keeps its current value.
Action
Update SMS ActionUpdates the name, message text or sending instructions of an existing SMS action.
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
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Questions
PostStack and Synthflow AI, answered
What can start an automation from PostStack?
Any of PostStack's 7 triggers in the catalog, including Contact Updated (instant), New Contact (instant), New Inbound Email and New Sent Email (instant). Describe the moment in plain language and your agent picks the right one.
What can your agent do in Synthflow AI when something happens in PostStack?
Any of Synthflow AI's 25 actions, including Create Assistant, Create Booking Calcom Action, Create Booking GHL Action and Create Call. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Synthflow AI to PostStack?
Synthflow AI has no triggers in the catalog today, so automations start in PostStack. If you need the other direction, ask: your agent reads Synthflow AI's API documentation and adds it.
Do I have to build a connector for PostStack or Synthflow AI?
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 PostStack and Synthflow AI 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.