Connect OneSignal (REST API) to Postmark

Automate workflows between OneSignal (REST API) and Postmark. No coding required.

What you can automate between OneSignal (REST API) and Postmark

  • Add subscriber when new contact created

    Add someone to your mailing list automatically when a new contact is added to your crm.

    Trigger
    New contact created in OneSignal (REST API)
    Action
    Add subscriber in Postmark

  • Create contact when new subscriber

    Add a new contact to your CRM automatically when someone joins your mailing list.

    Trigger
    New subscriber in Postmark
    Action
    Create contact in OneSignal (REST API)

  • Sync OneSignal (REST API) changes to Postmark

    Keep Postmark updated when a new deal or opportunity is created.

    Trigger
    New deal created in OneSignal (REST API)
    Action
    Update subscriber in Postmark

What syncs between OneSignal (REST API) and Postmark

Contact and deal data from OneSignal (REST API) syncs to Postmark for targeted campaigns. Segment by deal stage, contact type, or custom fields.

From OneSignal (REST API)

  • Contacts
  • Deals / opportunities
  • Pipeline stages
  • Notes
  • Custom fields

To Postmark

  • Campaign data
  • Subscriber lists
  • Email opens / clicks
  • Audience segments
  • Tags

How to connect OneSignal (REST API) to Postmark

What you'll need

  • An active OneSignal (REST API) account with API access enabled
  • An active Postmark account
  • A free Arahi AI account (sign up takes 30 seconds)
  • Admin or API access in OneSignal (REST API) to authorize the connection

  1. Create your Arahi AI account

    Sign up at app.arahi.ai — it takes 30 seconds and starts a 7-day free trial.

  2. Authenticate OneSignal (REST API)

    Grant Arahi read/write access to your contacts, deals, and pipeline data. You choose which objects the integration can access.

  3. Authenticate Postmark

    Grant Arahi access to your campaigns, audiences, and analytics data. You control which lists and campaigns the integration can modify.

  4. Choose your trigger

    Select the event that starts your workflow. Popular triggers include: new contact created in onesignal (rest api) or new subscriber in postmark.

  5. Configure the action

    Define what happens when the trigger fires — for example, add subscriber in postmark. Map the data fields between OneSignal (REST API) and Postmark.

  6. Test and activate

    Run a test to confirm data flows correctly between OneSignal (REST API) and Postmark, then toggle the workflow on. It runs 24/7 with automatic retries and error monitoring.

Why connect OneSignal (REST API) and Postmark?

Sales and marketing alignment starts with shared data. When OneSignal (REST API) contacts and deal stages sync to Postmark automatically, campaigns target the right people at the right time.

  • Sync OneSignal (REST API) contacts to Postmark lists so campaigns always target the right people
  • Trigger Postmark nurture sequences when OneSignal (REST API) deals stall or enter a new stage
  • Enrich OneSignal (REST API) records with Postmark engagement data like opens and clicks
  • Align sales and marketing by keeping OneSignal (REST API) and Postmark data in sync

Tips for your OneSignal (REST API) + Postmark integration

  • Map your custom fields during setup so data lands in the right place
  • Sync subscriber tags to keep segmentation consistent across tools
  • Use deal stage changes as triggers for the most impactful automations
  • Trigger workflows from campaign events like opens or clicks for timely follow-up

Who uses the OneSignal (REST API) + Postmark integration?

  • Sales reps tracking deal progress who rely on Postmark for marketing
  • Growth teams who need real-time data from OneSignal (REST API)
  • Sales teams and growth teams collaborating across tools

Frequently asked questions

How do I connect OneSignal (REST API) to Postmark?
Sign up for a free Arahi AI account, then click "Add Connection" to authenticate both OneSignal (REST API) and Postmark via OAuth. Choose a workflow template — like syncing crm events to marketing actions — customize the field mapping, and activate. The entire setup takes under 5 minutes.
What can I automate between OneSignal (REST API) and Postmark?
Common workflows include: sync OneSignal (REST API) contacts to Postmark email lists, trigger Postmark nurture sequences on OneSignal (REST API) deal stage changes, update OneSignal (REST API) lead scores from Postmark engagement data, and segment Postmark audiences by OneSignal (REST API) deal properties.
Is the OneSignal (REST API) and Postmark integration free?
Arahi AI includes 100 free actions per month on the Starter plan — enough for most small teams. If your OneSignal (REST API)-to-Postmark workflows need more volume, paid plans start at $49/month with unlimited workflows and priority execution.
Is my OneSignal (REST API) data secure when connected to Postmark?
Yes. Arahi uses OAuth 2.0 for authentication — we never store your OneSignal (REST API) or Postmark passwords. All data is encrypted in transit (TLS 1.3) and at rest (AES-256). Your crm data is only accessed when a workflow runs, and you can revoke access at any time from your Arahi dashboard.
Can I sync data both ways between OneSignal (REST API) and Postmark?
Yes. You can set up workflows that trigger from either OneSignal (REST API) or Postmark. For example, create a workflow where OneSignal (REST API) events update Postmark, and a separate one where Postmark changes sync back to OneSignal (REST API). Each direction is configured independently so you have full control.
Do I need technical skills to connect OneSignal (REST API) and Postmark?
No coding is required. Arahi's visual workflow builder lets you configure triggers, actions, and field mapping with clicks. If you can use OneSignal (REST API) and Postmark, you can set up the integration. Most users are running their first workflow within 10 minutes.

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