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// http header · response header

Retry-After

When to retry (with 429 or 503)

What the Retry-After header does

Retry-After accompanies a 429 Too Many Requests or 503 Service Unavailable and tells the client how long to wait before retrying — either seconds or an HTTP date. Well-behaved clients honour it instead of hammering the server.

Example

Retry-After: 120

Where it's used

Retry-After is a response header. Response headers are sent by the server to describe the response and tell the client how to handle it.

Other response headers

Content-Encoding Content-Disposition ETag Last-Modified Location Set-Cookie Server Retry-After WWW-Authenticate
TOOL

HTTP Headers Parser

Turn a block of raw headers into readable JSON.

REFERENCE

All HTTP Headers

Common request, response, caching, CORS, and security headers.

GUIDE

How to Read and Parse HTTP Headers

The anatomy of headers and how to work with them.