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Fix Python "JSONDecodeError: Expecting value" When Calling APIs

Self-Hosting & Infra beginner 6 min read $0.01 Updated 2026-10-20

Diagnosing Python JSON parsing failures: reading status code and raw text, empty bodies, HTML error pages, Content-Type checks, BOM, NaN and trailing commas, NDJSON, large integers and clear error handling for requests and httpx.

response.json() raises JSONDecodeError. The body is empty, HTML, a rate-limit page, gzip junk or JSON Lines. Print the status and body first, check content type, and parse defensively.

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