Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The response read-only property of the PublicKeyCredential interface is an AuthenticatorResponse object which is sent from the authenticator to the user agent for the creation/fetching of credentials. The information contained in this response will be used by the relying party's server to verify the demand is legitimate.

An AuthenticatorResponse is either:

In order to validate the creation of credentials, a relying party's server needs both:

Note: When validating the fetching of existing credentials, the whole PublicKeyCredential object and the client extensions are necessary for the relying party's server.

Note: This property may only be used in top-level contexts and will not be available in an <iframe> for example.


response = publicKeyCredential.response


An AuthenticatorResponse object containing the data a relying party's script will receive and which should be sent to the relying party's server in order to validate the demand for creation or fetching. This object contains data from the client (AuthenticatorResponse/clientDataJSON) and from the authenticator.


var options = {
  challenge: new Uint8Array(16) /* from the server */,
  rp: {
    name: "Example CORP",
    id  : ""
  user: {
    id: new Uint8Array(16) /* from the server */,
    name: "",
    displayName: "John Doe"
  pubKeyCredParams: [
      type: "public-key",
      alg: -7

navigator.credentials.create({  publickey: options })
  .then(function (pubKeyCredential) {
    var response = pubKeyCredential.response;
    var clientExtResults = pubKeyCredential.getClientExtensionResults();
    // Send response and client extensions to the server so that it can validate
    // and create credentials

}).catch(function (err) {
  // Deal with any error


Specification Status Comment
Web Authentication: An API for accessing Public Key Credentials Level 1
The definition of 'response' in that specification.
Recommendation Initial definition.

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
responseChrome Full support 67
Full support 67
Full support 65
Notes Disabled
Notes Only supports USB U2F tokens.
Disabled From version 65: this feature is behind the Web Authentication API preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.
Edge Full support 18Firefox Full support 60
Full support 60
Notes Only supports USB U2F tokens.
IE No support NoOpera No support NoSafari Full support 13WebView Android Full support 70Chrome Android Full support 70Firefox Android Full support 60
Full support 60
Notes Only supports USB U2F tokens.
Opera Android No support NoSafari iOS Full support 13.3Samsung Internet Android No support No


Full support
Full support
No support
No support
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.