Syncing all transactions & inventory from Oval POS (v21.4.2026) to Manager Cloud via API

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1

Hi All,

I’m looking to fully automate the flow of data from Oval POS (version 21.4.2026) into Manager (Cloud edition) — specifically:

  • All transactions (sales, refunds, etc.) recorded in Oval should be reflected in Manager under the correct accounts (revenue, tax, discounts, etc.)
  • Inventory data (stock levels, item movements) should stay in sync between the two systems

Essentially, whatever activity shows up in Oval should automatically appear in Manager, correctly categorized, without manual re-entry.

What I need help with:

  1. Has anyone built or seen an integration between Oval POS and Manager Cloud specifically? Direct API-to-API, or via middleware (Zapier, Make, custom script)?
  2. For transactions: does it make more sense to push these into Manager as Sales Invoices/Receipts, or as Journal Entries summarizing daily totals? What’s worked well for others in terms of keeping account mapping clean?
  3. For inventory: does Manager’s API support updating inventory items/quantities directly, or is this typically handled through a different mechanism (e.g., inventory write-offs, purchase invoices)?
  4. Any advice on authentication (API keys, OAuth, etc.) for Manager Cloud, and whether Oval exposes webhooks or requires polling to detect new transactions?
  5. Any unexpected issues around chart of accounts mapping — e.g., making sure each Oval transaction type lands in the right Manager account automatically?

If anyone has done something similar or has sample code/workflow to share, I’d really appreciate it.

Thanks

2

Hi @Yvonne

Thank you so much for taking the initiative and sharing this—really appreciate your effort and great idea!

Building on this, I’d like to suggest considering open-source POS solutions from the ERPNext / Frappe ecosystem (such as POSAwesome or the built-in ERPNext POS). They offer excellent quality, high performance, and complete flexibility.

The main advantage is that Frappe provides powerful REST API endpoints and built-in Server Scripts natively. This makes connecting and syncing sales data directly to Manager.io via API completely seamless—without any recurring API fees or third-party limitations.

Here are a few useful references:

Thanks again for driving this forward!

Best regards,

Abed