Accepted input

Accepts API endpoints, request payloads, headers, schemas, or captured responses depending on the tool. Large bodies stay in your browser unless the tool explicitly sends a request to the endpoint you provide.

How to use

1. Open Header Builder and paste, type, or upload the input it expects.
2. Adjust the available options until the preview or output reflects the workflow you need.
3. Use copy, download, or related follow-up tools once the result looks correct.

Tips

• Pair it with other api tools from the same category when you need a broader workflow.
• Pinned tools and recent history make it faster to return to repeated workflows.