How do you transform a webhook payload?
Transforming a webhook payload means mapping, reshaping, and validating the incoming JSON before your API sees it — so downstream code reads one schema, no matter how many senders are on the other side. In Slashbin, you draw the mapping in a visual editor and pin it to a Golden Model so drift fails at the edge, not in production.
The problem it solves
You have webhooks from N sources — Stripe, Shopify, Square, an internal service — each with its own field names, nesting, and quirks (integers-as-strings, cents-vs-decimals, missing customer IDs). Downstream, you want one schema. Without a transform layer, that normalization scatters into per-source handlers, per-source bugs, and a schema no single team owns.
How it works in Slashbin
- Map fields visually. Drag a source field onto a destination field — no glue code, no deploy.
- Validate against a Golden Model. The transform's output is checked against your canonical schema. Drift is rejected before your API ever sees it.
- Cast values safely. Decimal currency, integer coercion, and unit conversion happen in the transform, not in your handler.
- Version and replay. Every transform edit is a versioned model. Replay historical payloads through the current version to heal past mistakes.
Feature detail
Visual Field Mapping
Drag-and-drop field mapping between source and destination schemas.
Golden Model Validation
Enforce a canonical schema across all your webhook sources.
Safe Decimal Casting
Prevent floating-point errors in currency and numeric fields.
Payload Reshaping
Flatten, nest, rename, and filter fields to match your target API.
Worked examples
Learn how to build your first transform.