API Payload Preflight Checklist

A checklist for formatting JSON, checking query strings, decoding tokens, converting timestamps, and reviewing payloads before testing an API.

Validate structure first

Before blaming the server, confirm that the JSON is valid, fields are spelled correctly, arrays are in the expected place, and required values are present.

Check encoding and dates

URL encoding, Base64, JWTs, and timestamps are common places for hidden mistakes. Convert and inspect these values before retrying requests.

Keep sensitive data out of examples

When sharing an API issue, replace private tokens, IDs, emails, addresses, and internal URLs with safe sample values.

These tools are designed for estimates, formatting, planning, and workflow support. Check important results before using them in business, legal, financial, medical, or technical decisions.