What You Can Do with the Developer Portal
An overview of what the ReceiptRoller developer portal lets you do. Combine data retrieval and operations via the REST API with real-time event delivery via Webhooks to connect store and user data from external systems.
Webhook overview
Which webhook events are actually sent, what the request and signature headers look like, how duplicates, order and lost events behave, and when to use the API.
Designing resends, ordering, and idempotency
What counts as success, the retry rules (1 min, 10 min, 1 h, four attempts), ordering and lost events, and dropping duplicates by X-RR-Delivery.
Receive new sales by webhook and post them to Slack
Register a receipt.created webhook, verify its signature and drop duplicates in Node.js, and post each new sale to a Slack channel.
Webhook is not being delivered
When a webhook does not arrive: narrow it down with a test send and the delivery log, then check the active flag, subscribed events, connection and signature.
How to register a Webhook
Register a webhook in the developer portal or through the API, choose events that are actually sent, run a test send, and change, pause or delete a webhook.
Signature verification and security
How X-RR-Signature is computed, verification code for Node.js, Python and C#, guarding against replays, and how to replace a webhook secret.
Monitoring and handling failures
Read a webhook's active flag, last delivery time and delivery log, notice when it has switched itself off, recover, and fill the gap from the API.
Show a store's reservations in your own calendar
Fetch the next 7 days of a store's reservations with the Reservations API and write them to an iCalendar (.ics) file with Node.js.
Using the Reservations API
How to read, create, change, move and update the status of reservations, generate slots, and read menus, settings, tables and monthly counts.
PosTransactionDto specification — field reference for transaction data
A complete field reference for PosTransactionDto, the canonical model for the transaction data ReceiptRoller handles. For each category — identifiers, dates, amounts, line items, payments, staff, status, and CRM linkage — it summarizes the field names, types, meanings, and how each POS vendor populates them. A reference for developers and external-system integrators. Also referenced from the Smaregi and Square mapping articles.