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You operate a receipt collection network. OpenCard connects your receipts to card transactions and passes enriched data to EMS integrators.

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Where you sit

  1. You continuously collect receipts from merchants in your network
  2. OpenCard receives a card transaction marked receiptable: true
  3. OpenCard sends you the transaction details to match against your receipts
  4. When you find a match, you POST the receipt to OpenCard
  5. OpenCard stores the receipt, extracts VAT + line items
  6. EMS apps receive receipt.fetched, transaction.true.vat, and transaction.line.items webhooks
You only integrate with OpenCard — not with EMS apps or card programs.

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What you deliver to OpenCard

You sendOpenCard doesEMS receives
Receipt file (PDF, image, XML)Stores file, generates URLreceipt.fetched
VAT breakdown in receiptCreates TrueVAT recordstransaction.true.vat
Line items in receiptCreates LineItem recordstransaction.line.items

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Onboarding checklist

  • Receive client secret from OpenCard
  • Endpoint ready to receive match requests from OpenCard
  • Implement outbound callback to OpenCard (POST /v1/service/marcet/callback/{referenceId})
  • Handle CallbackRequestResolved and CallbackRequestDeleted
  • Sign every payload with HMAC-SHA256
→ Callback delivery for endpoint details. Contact support@opencard.io to get started.