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POST
/
user-authenticators
/
passkey
/
authentication-options
Generate Authentication Options
curl --request POST \
  --url https://api.authsignal.com/v1/client/user-authenticators/passkey/authentication-options \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "challengeId": "<string>",
  "username": "<string>"
}
'
{
  "challengeId": "<string>",
  "options": {}
}

Documentation Index

Fetch the complete documentation index at: https://docs.authsignal.com/llms.txt

Use this file to discover all available pages before exploring further.

Authorizations

​
Authorization
string
header
required

Use a short-lived token obtained from the Server API's Track Action endpoint. The token is valid for 10 minutes and should be passed in the Authorization header as 'Bearer {token}'.

Body

application/json
​
challengeId
string

The ID of the challenge returned by Initiate Challenge. Only required if you want to customize the action code associated with the passkey sign-in.

​
username
string

If passed, will restrict the allowed credentials for the passkey sign-in to those associated with the given username. Recommended for when using passkeys for MFA or step-up authentication.

Response

OK

​
challengeId
string
required

The ID of the passkey challenge. Should be passed back to the complete the challenge.

​
options
object
required

The options for public key credential authentication, including rpId and challenge.