Code Quality Rank: L4
Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Tags: HTTP     Ajax     Request     Agent    
Latest version: v6.1.0

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build status code coverage code style styled with prettier made with lass [license](LICENSE)

Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features

Table of Contents



npm install superagent


yarn add superagent



const superagent = require('superagent');

// callback
  .send({ name: 'Manny', species: 'cat' }) // sends a JSON post body
  .set('X-API-Key', 'foobar')
  .set('accept', 'json')
  .end((err, res) => {
    // Calling the end function will send the request

// promise with then/catch

// promise with async/await
(async () => {
  try {
    const res = await superagent.post('/api/pet');
  } catch (err) {


The browser-ready, minified version of superagent is only 6 KB (minified and gzipped)!

Browser-ready versions of this module are available via jsdelivr, unpkg, and also in the node_modules/superagent/dist folder in downloads of the superagent package.

Note that we also provide unminified versions with .js instead of .min.js file extensions.


This is the solution for you if you're just using <script> tags everywhere!

<script src="https://polyfill.io/v3/polyfill.min.js?features=Array.from,Promise,Symbol,Object.setPrototypeOf,Object.getOwnPropertySymbols,Set,Math.trunc"></script>
<script src="https://cdn.jsdelivr.net/npm/superagent"></script>
<!-- if you wish to use unpkg.com instead: -->
<!-- <script src="https://unpkg.com/superagent"></script> -->
<script type="text/javascript">
  (function() {
    // superagent is exposed as `window.superagent`
    // if you wish to use "request" instead please
    // uncomment the following line of code:
    // `window.request = superagent;`
      .send({ name: 'Manny', species: 'cat' }) // sends a JSON post body
      .set('X-API-Key', 'foobar')
      .set('accept', 'json')
      .end(function (err, res) {
        // Calling the end function will send the request


If you are using browserify, webpack, rollup, or another bundler, then you can follow the same usage as Node above.

Supported Platforms

  • Node: v6.x+
  • Browsers (see [.browserslistrc](.browserslistrc)):
  npx browserslist
  and_chr 71
  and_ff 64
  and_qq 1.2
  and_uc 11.8
  android 67
  android 4.4.3-4.4.4
  baidu 7.12
  bb 10
  bb 7
  chrome 73
  chrome 72
  chrome 71
  edge 18
  edge 17
  firefox 66
  firefox 65
  ie 11
  ie 10
  ie 9
  ie_mob 11
  ie_mob 10
  ios_saf 12.0-12.1
  ios_saf 11.3-11.4
  op_mini all
  op_mob 46
  op_mob 12.1
  opera 58
  opera 57
  safari 12
  safari 11.1
  samsung 8.2
  samsung 7.2-7.4

Required Browser Features

We recommend using https://polyfill.io (specifically with the bundle mentioned in VanillaJS above):

<script src="https://polyfill.io/v3/polyfill.min.js?features=Array.from,Promise,Symbol,Object.setPrototypeOf,Object.getOwnPropertySymbols,Set,Math.trunc"></script>
  • IE 9-10 requires a polyfill for Promise, Array.from, Symbol, Object.getOwnPropertySymbols, and Object.setPrototypeOf
  • IE 9 requires a polyfill for window.FormData (we recommend formdata-polyfill), Set, and Math.trunc


SuperAgent is easily extended via plugins.

const nocache = require('superagent-no-cache');
const superagent = require('superagent');
const prefix = require('superagent-prefix')('/static');

  .query({ action: 'edit', city: 'London' }) // query string
  .use(prefix) // Prefixes *only* this request
  .use(nocache) // Prevents caching of *only* this request
  .end((err, res) => {
    // Do something

Existing plugins:

Please prefix your plugin with superagent-* so that it can easily be found by others.

For SuperAgent extensions such as couchdb and oauth visit the wiki.

Upgrading from previous versions

Please see GitHub releases page for the current changelog.

Our breaking changes are mostly in rarely used functionality and from stricter error handling.

  • 6.0 to 6.1
  • 5.x to 6.x:
    • Retry behavior is still opt-in, however we now have a more fine-grained list of status codes and error codes that we retry against (see updated docs)
    • A specific issue with Content-Type matching not being case-insensitive is fixed
    • Set is now required for IE 9, see Required Browser Features for more insight
  • 4.x to 5.x:
    • We've implemented the build setup of Lass to simplify our stack and linting
    • Unminified browserified build size has been reduced from 48KB to 20KB (via tinyify and the latest version of Babel using @babel/preset-env and .browserslistrc)
    • Linting support has been added using caniuse-lite and eslint-plugin-compat
    • We can now target what versions of Node we wish to support more easily using .babelrc
  • 3.x to 4.x:
    • Ensure you're running Node 6 or later. We've dropped support for Node 4.
    • We've started using ES6 and for compatibility with Internet Explorer you may need to use Babel.
    • We suggest migrating from .end() callbacks to .then() or await.
  • 2.x to 3.x:
    • Ensure you're running Node 4 or later. We've dropped support for Node 0.x.
    • Test code that calls .send() multiple times. Invalid calls to .send() will now throw instead of sending garbage.
  • 1.x to 2.x:
    • If you use .parse() in the browser version, rename it to .serialize().
    • If you rely on undefined in query-string values being sent literally as the text "undefined", switch to checking for missing value instead. ?key=undefined is now ?key (without a value).
    • If you use .then() in Internet Explorer, ensure that you have a polyfill that adds a global Promise object.
  • 0.x to 1.x:
    • Instead of 1-argument callback .end(function(res){}) use .then(res => {}).


Kornel Lesiński
Peter Lyons
Hunter Loftis
Nick Baugh


[MIT](LICENSE) © TJ Holowaychuk

*Note that all licence references and agreements mentioned in the superagent README section above are relevant to that project's source code only.