# PkcePair (/docs/auth/api/interfaces/PkcePair)



[@kysoql/auth](/docs/auth/api) / PkcePair

PKCE verifier and matching S256 challenge.

## Properties [#properties]

| Property                                      | Modifier   | Type     | Description                                                      |
| --------------------------------------------- | ---------- | -------- | ---------------------------------------------------------------- |
| <a id="api-property-verifier" /> `verifier`   | `readonly` | `string` | High-entropy PKCE code verifier retained for the token exchange. |
| <a id="api-property-challenge" /> `challenge` | `readonly` | `string` | Base64url-encoded SHA-256 challenge sent during authorization.   |