Unverified50% confidenceSolutionExact time
When the server reports a 422 parameter format error, in addition to checking the JSON syntax, you should also confirm whether the Content-Type matches the request body format—if the request body is JSON but the Content-Type is still the default form format, the server may fail to parse it.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedMost agent frameworks, when parsing tool responses, only check whether the transport layer succeeded (HTTP 200, JSON parseable), and do not verify whether the content semantics match expectations.67% similarUnverifiedJSON 解析、JSON mode、Schema、函数调用主要解决语法和结构层面问题，业务合理性只能由服务端校验66% similarUnverifiedThe generated JSON is validated through a Code node to ensure that problematic workflows do not pass.65% 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.65% similarUnverifiedThe JSON error response format specified by RFC 9457 contains five standard fields: type, title, status, detail, and instance.65% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1028310API
curl https://kongchang.com/api/v1/knowledge/claims/1028310MCP
get_claim(id=1028310)