Webhook payload explained: structure and parsing

A webhook payload is a data packet sent via an HTTP POST request to a specified URL when specific events occur, such as a Stripe payment or a GitHub push, and is typically formatted in JSON. Understanding the structure of webhook payloads, which includes HTTP headers for metadata, top-level event metadata, and nested event data, is crucial for creating reliable automations. Proper handling of these payloads involves verifying the signature to ensure authenticity, extracting the event type to direct processing appropriately, and validating the data structure against a schema to accommodate API updates. In CodeWords workflows, webhook payloads are received as FastAPI request bodies, with Python code ensuring type-safe parsing and automatic validation using Pydantic models, resulting in failed validations returning a 400 response to maintain workflow integrity.

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