You wrote code to read X-RateLimit-Remaining from response headers but always get null. What is the most likely cause?

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Rest API - Rate Limiting and Throttling

You wrote code to read X-RateLimit-Remaining from response headers but always get null. What is the most likely cause?

AThe header name is case-sensitive and was misspelled

BThe API does not send rate limit headers

CYou accessed headers before the response arrived

DThe response body is empty

Step-by-Step Solution

Solution:

Step 1: Check header name case sensitivity
HTTP headers are case-insensitive, but some APIs or libraries require exact casing when accessing headers.
Step 2: Consider other causes
API usually sends rate limit headers; accessing headers before response or empty body does not cause null header value.
Final Answer:
The header name is case-sensitive and was misspelled -> Option A
Quick Check:
Correct header name spelling is crucial [OK]

Quick Trick: Check exact header name spelling and casing [OK]

Common Mistakes:

MISTAKES

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