API examples copied from documentation, chat, PDFs or tickets can fail for reasons unrelated to the API. Smart quotes, hidden formatting, trailing comments, line wrapping and placeholder text can all make a request look valid while breaking the test.
Start with JSON Formatter and Validator for JSON payloads. Use Strip Markdown Formatting, Remove Non-ASCII, Remove Extra Spaces and Trim Text when the copied example contains formatting noise.
Remove the wrapper, keep the payload
Docs often wrap payloads inside code fences, comments or explanatory text. Keep the actual request body separate from the documentation around it.
Replace placeholders deliberately
Do not leave values like YOUR_API_KEY, example.com or fake IDs in a live test. Replace them one by one so you know what changed.
Validate before sending
If the request body is JSON, validate it before calling the API. A local syntax error is faster to fix than a confusing API error response.

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