Unverified50% confidenceFactExact time
A response beginning with '<' typically means the client expected JSON but actually received HTML
1
Sources
50%
Confidence
Long-term
Relevance
10/11/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedAfter the API server processes a request, it packages the result in JSON format and returns it, containing the AI response text along with metadata such as token usage.64% similarUnverifiedEventSource only supports GET requests and cannot carry a JSON request body; therefore chat-type endpoints that require POST should switch to using fetch to read the stream.64% similarUnverifiedWhen a cache is missing the Vary header, it may return the JSON version to users expecting HTML, causing cache poisoning and page rendering failures.63% similarUnverifiedBacktesting results can be exported as JSON files.63% similarUnverifiedExplicit URL suffix schemes (such as /data returning HTML and /data.json returning JSON) are more predictable, easier to cache, and simpler to debug and share than content negotiation.60% similar
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