Unverified50% confidenceFactExact time
TTS services usually limit the number of requests per minute, and exceeding the limit returns 429 Too Many Requests.
1
Sources
50%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedAPI Rate Limit refers to the maximum number of requests a third-party service allows within a given time period; exceeding it returns a 429 Too Many Requests error.78% similarUnverified在高并发场景下，一个平均延迟180ms的TTS服务大约每8次响应就有1次飙到400ms以上73% similarPartially VerifiedThe cache is not permanently valid; providers usually have a TTL of a few minutes to an hour, and the hit rate fluctuates with user behavior.64% similarUnverifiedUnder a 4M TPM premise, long Agent turns with a 400K context can trigger at most 10 requests per minute (hitting the TPM cap), and full-context requests only 4 per minute.64% similarUnverified大多数服务商对Webhook回调有超时限制，通常为5-30秒63% similar
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