Integrate PostOnce with Systeme.io to automate workflows, sync data between apps, and eliminate repetitive tasks with AI-powered automation.
Assign a Tag to a Contact in Systemedotio when New Post Created in PostOnce
Create/Update a Contact in Systeme.io when New Post Created in PostOnce
Search Contact by Email in Systeme.io when New Post Created in PostOnce
Grant access to course in Systemedotio when New Post Created in PostOnce
Create Upload URL in Postonce when New Contact in Systeme.io
Start from a real workflow other teams are already running.
PostOnce
When this happens...
New Post Created
Systeme.io
Automatically do this!
Assign a Tag to a Contact
Create/Update a Contact
Search Contact by Email
Grant access to course
Assign a Tag to a Contact in Systemedotio when New Post Created in PostOnce
Use this flowCreate/Update a Contact in Systeme.io when New Post Created in PostOnce
Use this flowSearch Contact by Email in Systeme.io when New Post Created in PostOnce
Use this flowGrant access to course in Systemedotio when New Post Created in PostOnce
Use this flowCreate Upload URL in Postonce when New Contact in Systeme.io
Use this flowGet Media from Postonce when New Contact in Systeme.io
Use this flowCreate Post on Postonce when New Contact in Systeme.io
Use this flowList Posts from Postonce when New Contact in Systeme.io
Use this flowCancel Post in Postonce when New Contact in Systeme.io
Use this flowPublish Post on Postonce when New Contact in Systeme.io
Use this flowEverything you can automate between PostOnce and Systeme.io.
When this happensTriggers
A trigger is an event that starts a workflow.
Runs when a new post is created. You can filter by account and set the lookback minutes.
Triggers when a new contact is created.
Action is the task that follows automatically within your PostOnce integrations.
Generate a signed upload URL for a media file by filename; MIME type is auto-detected from the filename extension.
Retrieve a media item's storage path and public URL using its media ID.
Create a post to selected accounts with content, media, scheduling, and platform-specific options.
Retrieve posts or a single post by ID. Leave fields empty to return all data; set limit (1–100) and after cursor.
Cancel a scheduled or pending post by Post ID without deleting its record or published content.
Publish a scheduled or draft Postonce post immediately by specifying the post ID.

Follow a simple walkthrough to create, test, and launch your first automation.
Connect your apps
Link the apps you want to automate.
Configure your workflow
Set up triggers, actions, and map your data.
Test & publish
Test your workflow and publish it.
Recognized by leading review platforms and trusted by 10,000+ businesses worldwide.
Just describe the task in plain English. viaSocket AI selects the right apps, builds the workflow, maps the fields, and prepares everything for review before you publish.

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PostOnce is a social media automation platform that enables creators, teams, and businesses to schedule and crosspost content across platforms including TikTok, Instagram, YouTube, Facebook, LinkedIn, X, Threads, Bluesky, and Pinterest.
Learn moreSysteme.io is an all-in-one marketing platform designed to help entrepreneurs and small businesses manage and automate their online marketing efforts. It offers a range of tools including sales funnels, email marketing, online courses, and membership sites, all integrated into a single platform to streamline business operations and enhance productivity.
Learn moreSign up for a free viaSocket account, then authorize both your PostOnce and Systeme.io accounts. From there, pick a trigger in one app and an action in the other. Your first workflow can be live in under five minutes.
Yes. viaSocket uses instant triggers where available, so data moves between PostOnce and Systeme.io as soon as the event happens. Scheduled polling triggers run at a maximum interval of 15 minutes.
Yes. You can map specific fields, apply filters to skip records that do not match your conditions, and transform values before they reach Systeme.io. No coding required.
Yes. You can set up a workflow where PostOnce triggers actions in Systeme.io, and a separate workflow where Systeme.io triggers actions in PostOnce. Both run independently and in real time.
viaSocket logs every run so you can see exactly what succeeded and what failed. Failed tasks can be retried from the dashboard without re-configuring the workflow.
Yes, there is a free plan that covers basic workflows between PostOnce and Systeme.io. Paid plans unlock higher task limits, faster polling, and advanced features like multi-step workflows and conditional logic.
No. The entire PostOnce and Systeme.io integration is built through a visual, point-and-click interface. Code blocks are available if you want them, but they are never required.