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  • Zap step setup and testing using the Zap editor
  • Zap startup - turning a Zap on
  • Zap step execution when a Zap runs
The following pages describe the operating constraints of these run-time modes, the errors your integration users could run into, and best practices. Developers in the Platform CLI development environment and those using Code Mode in the Platform UI will find these pages most relevant. Many errors can be viewed in your integration’s log monitoring in the Platform UI, or if using the Platform CLI, by using zapier-platform logs (or deprecated zapier logs) command.

Important Zapier constraints summary

Note: File inputs are handled via dehydration when passed between Zap steps, meaning the actual file contents don’t count against the Trigger/Action input payload limits. Files are referenced by URL and fetched as needed by the receiving action.
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