tool::http-status-detail
429 Too Many Requests
The user has sent too many requests in a given time (rate limiting).
Status Code
429
Name
Too Many Requests
Category
4xxDetailed Explanation
HTTP 429 Too Many Requests indicates the client has sent too many requests in a given time window. It is the standard response for API rate limiting. The Retry-After header can tell clients when they may send requests again. It is used to defend against DDoS attacks, prevent API abuse, and ensure fair usage.
Common Causes
- ▸Exceeding the per-minute or per-hour request quota for an API key
- ▸A crawler or scraper sending excessive requests in a short period
- ▸A retry loop calling an API repeatedly without a backoff strategy
- ▸Multiple clients sharing the same IP and consuming a shared quota
How to Fix
- 1.Wait for the duration specified in the Retry-After header before retrying
- 2.Implement an exponential backoff retry strategy
- 3.Consider upgrading your API key plan to a higher tier
- 4.Cache responses to avoid repeatedly requesting the same data
- 5.Distribute requests across multiple API keys (check terms of service)
Related HTTP Headers
Retry-AfterX-RateLimit-LimitX-RateLimit-RemainingX-RateLimit-ResetResponse Example
HTTP/1.1 429 Too Many Requests
Retry-After: 60
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1711900800
Content-Type: application/json
{"error":"rate_limit_exceeded","message":"Too many requests. Please retry after 60 seconds."}Related Status Codes
400Bad RequestThe server could not understand the request due to invalid syntax.→401UnauthorizedAuthentication is required and has failed or not been provided.→402Payment RequiredReserved for future use; some services use it for payment walls.→403ForbiddenThe server refuses to fulfill the request (authenticated but unauthorized).→404Not FoundThe requested resource could not be found.→
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