Unverified50% confidenceFactExact time
Most web frameworks (such as Express's express.json() and Next.js's req.json()) automatically parse the request body into a JavaScript object, and when it is later restored with JSON.stringify(body), details such as key order, whitespace and Unicode escaping may differ from the original bytes, causing the signature comparison to fail.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIn Express, if the webhook route is registered after the express.json() middleware, the request body is parsed into an object, so what is passed to constructEvent is not the raw string, causing signature verification to fail.75% similarUnverifiedThe Structured Output package supports two constraint methods: JSON schema and regular expressions (regex).71% similarUnverified在FastMCP中，函数的类型提示和文档字符串会自动转换为符合JSON Schema规范的工具模式，无需手写JSON Schema69% similarUnverifiedEven when using structured output interfaces, occasional format drift or missing fields from the model still occur, and production environments typically require adding JSON validation and exception fallback mechanisms.68% similarUnverifiedJSON originally emerged from the JavaScript ecosystem and is now natively supported by virtually all programming languages, becoming the de facto standard for Web API communication.68% similar
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