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Headers & Caching

Set any response header, test ETags, Last-Modified and Cache-Control.

About Headers & Caching

/response-headers?X-Test=1 sends back the headers you ask for. /cache answers 304 Not Modified when you send If-Modified-Since or If-None-Match, /cache/{seconds} sets Cache-Control max-age, and /etag/{etag} implements If-None-Match (304) and If-Match (412).

How to use

  1. Pick an endpoint and fill in its path, query and header values – the defaults already work.
  2. Press Send to call it from your browser, or copy the ready-made curl command for your terminal.
  3. Read the status, timing, response headers and body – or open the request in the Request Tester to change anything.

Requests are answered and forgotten: HttpNex never stores what you send – only an anonymous count of calls per endpoint group.

Related tools

Status Code EndpointReturn any status code – or a random one from a weighted list. Response FormatsSample JSON, XML, HTML, UTF-8 text and a robots.txt-denied page. CompressionResponses compressed with gzip or deflate, whatever you ask for. HTTP Request TesterBuild any request – method, URL, query, headers, auth, body – send it and inspect the response. HTTP Status CodesEvery HTTP status code with its meaning – and a live test for each one. HTTP MethodsGET, POST, PUT, PATCH and DELETE endpoints that echo your request back. AnythingOne endpoint that accepts any method and any path and echoes it all back. Request InspectionSee your request headers, your public IP address and your User-Agent.