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HTTP Request & Response Service, written in Python + Flask.
Python HTML
Latest commit dee15b5 @sigmavirus24 sigmavirus24 Merge pull request #271 from mozillazg/fix-not-in
`not x in` -> `x not in`


httpbin(1): HTTP Request & Response Service

Freely hosted in HTTP, HTTPS & EU flavors by Runscope


Build Status


Endpoint Description
/ This page.
/ip Returns Origin IP.
/user-agent Returns user-agent.
/headers Returns header dict.
/get Returns GET data.
/post Returns POST data.
/patch Returns PATCH data.
/put Returns PUT data.
/delete Returns DELETE data
/gzip Returns gzip-encoded data.
/deflate Returns deflate-encoded data.
/status/:code Returns given HTTP Status code.
/response-headers Returns given response headers.
/redirect/:n 302 Redirects n times.
/redirect-to?url=foo 302 Redirects to the foo URL.
/relative-redirect/:n 302 Relative redirects n times.
/cookies Returns cookie data.
/cookies/set?name=value Sets one or more simple cookies.
/cookies/delete?name Deletes one or more simple cookies.
/basic-auth/:user/:passwd Challenges HTTPBasic Auth.
/hidden-basic-auth/:user/:passwd 404'd BasicAuth.
/digest-auth/:qop/:user/:passwd Challenges HTTP Digest Auth.
/stream/:n Streams n - 100 lines.
/delay/:n Delays responding for n - 10 seconds.
/drip Drips data over a duration after an optional initial delay, then (optionally) returns with the given status code.
/range/:n Streams n bytes, and allows specifying a Range header to select a subset of the data. Accepts a chunk_size and request duration parameter.
/html Renders an HTML Page.
/robots.txt Returns some robots.txt rules.
/deny Denied by robots.txt file.
/cache Returns 200 unless an If-Modified-Since or If-None-Match header is provided, when it returns a 304.
/cache/:n Sets a Cache-Control header for n seconds.
/bytes/:n Generates n random bytes of binary data, accepts optional seed integer parameter.
/stream-bytes/:n Streams n random bytes of binary data, accepts optional seed and chunk_size integer parameters.
/links/:n Returns page containing n HTML links.
/forms/post HTML form that submits to /post
/xml Returns some XML
/encoding/utf8 Returns page containing UTF-8 data.


Testing an HTTP Library can become difficult sometimes. RequestBin is fantastic for testing POST requests, but doesn't let you control the response. This exists to cover all kinds of HTTP scenarios. Additional endpoints are being considered.

All endpoint responses are JSON-encoded.


$ curl

{"origin": ""}

$ curl

{"user-agent": "curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3"}

$ curl

   "args": {},
   "headers": {
      "Accept": "*/*",
      "Connection": "close",
      "Content-Length": "",
      "Content-Type": "",
      "Host": "",
      "User-Agent": "curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3"
   "origin": "",
   "url": ""

$ curl -I

Server: nginx/0.7.67
Date: Mon, 13 Jun 2011 04:25:38 GMT
Connection: close
Content-Length: 135

$ curl

  "headers": {
    "Content-Length": "",
    "Accept-Language": "en-US,en;q=0.8",
    "Accept-Encoding": "gzip,deflate,sdch",
    "X-Forwarded-Port": "443",
    "X-Forwarded-For": "",
    "Host": "",
    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "User-Agent": "Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.83 Safari/535.11",
    "X-Request-Start": "1350053933441",
    "Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.3",
    "Connection": "keep-alive",
    "X-Forwarded-Proto": "https",
    "Cookie": "_gauges_unique_day=1; _gauges_unique_month=1; _gauges_unique_year=1; _gauges_unique=1; _gauges_unique_hour=1",
    "Content-Type": ""
  "args": {
    "show_env": "1"
  "origin": "",
  "url": ""

Installing and running from PyPI

You can install httpbin as a library from PyPI and run it as a WSGI app. For example, using Gunicorn:

$ pip install httpbin
$ gunicorn httpbin:app

Or run it directly:

$ python -m httpbin.core


  • 0.4.1: Added floating-point support for /delay endpoint
  • 0.4.0: New /image/svg endpoint, add deploy to heroku button, add 406 response to /image, and don't always emit the transfer-encoding header for stream endpoint.
  • 0.3.0: A number of new features, including a /range endpoint, lots of bugfixes, and a /encoding/utf8 endpoint
  • 0.2.0: Added an XML endpoint. Also fixes several bugs with unicode, CORS headers, digest auth, and more.
  • 0.1.2: Fix a couple Python3 bugs with the random byte endpoints, fix a bug when uploading files without a Content-Type header set.
  • 0.1.1: Added templates as data in
  • 0.1.0: Added python3 support and (re)publish on PyPI


A Runscope Community Project. Originally created by Kenneth Reitz.


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