> ## Documentation Index > Fetch the complete documentation index at: https://docs.streambird.io/llms.txt > Use this file to discover all available pages before exploring further. # Initiate WebAuthn Registration (beta) > Initiate a WebAuthn Registration Request. This endpoint requires that a user already exists on MoonKey. Pass the returned JSON object in `public_key_credential_creation_options` property into `await create(options)` as `options` if you are using [webauthn-json](https://github.com/github/webauthn-json) or to [navigator.credentials.create(options)](https://w3c.github.io/webappsec-credential-management/#algorithm-create-cred). ## Returns A successful response returns a `public_key_credential_creation_options` property and `user_id` property. ## OpenAPI ````yaml post /v1/auth/webauthn/registrations/begin openapi: 3.1.0 info: title: MoonKey Auth API description: >- Explore all the details of MoonKey Auth API. All of our APIs are RESTful and accept and return JSON. version: v1 servers: - url: https://api.moonkey.fun description: Production variables: {} security: - Authorization: [] tags: - name: Users description: User management API - name: Magic Links description: '' - name: OTPs description: >- Send OTP (One-time passcodes) by all the supported delivery methods such as SMS, email. - name: OAuth description: '' - name: Wallets Login description: '' - name: Managed Wallets description: '' - name: Wallet Import description: >- Import existing wallets into the platform using secure HPKE encryption. This flow ensures raw entropy (seed phrases or private keys) never touches the server in plaintext. externalDocs: url: '' description: '' paths: /v1/auth/webauthn/registrations/begin: parameters: [] post: tags: - WebAuthn summary: Initiate WebAuthn Registration (beta) description: >- Initiate a WebAuthn Registration Request. This endpoint requires that a user already exists on MoonKey. Pass the returned JSON object in `public_key_credential_creation_options` property into `await create(options)` as `options` if you are using [webauthn-json](https://github.com/github/webauthn-json) or to [navigator.credentials.create(options)](https://w3c.github.io/webappsec-credential-management/#algorithm-create-cred). ## Returns A successful response returns a `public_key_credential_creation_options` property and `user_id` property. operationId: BeginWebAuthnRegistration requestBody: content: application/json: schema: $ref: '#/components/schemas/BeginWebAuthnRegistrationRequest' examples: BeginWebAuthnRegistrationReq: value: domain: localhost user_id: user_24wFP9pDa9YiMJLun94iKykoZs2 responses: '200': description: OK content: application/json: schema: description: '' type: object properties: public_key_credential_creation_options: type: object properties: publicKey: type: object properties: challenge: type: string minLength: 1 rp: type: object properties: name: type: string minLength: 1 id: type: string minLength: 1 required: - name - id user: type: object properties: name: type: string minLength: 1 displayName: type: string minLength: 1 id: type: string minLength: 1 required: - name - displayName - id pubKeyCredParams: type: array uniqueItems: true minItems: 1 items: required: - type - alg properties: type: type: string minLength: 1 alg: type: number authenticatorSelection: type: object properties: authenticatorAttachment: type: string minLength: 1 userVerification: type: string minLength: 1 required: - authenticatorAttachment - userVerification timeout: type: number excludeCredentials: type: array uniqueItems: true minItems: 1 items: required: - type - id properties: type: type: string minLength: 1 id: type: string minLength: 1 required: - challenge - rp - user - pubKeyCredParams - authenticatorSelection - timeout - excludeCredentials required: - publicKey user_id: type: string minLength: 1 required: - public_key_credential_creation_options - user_id examples: BeginWebAuthnRegistrationResp: value: public_key_credential_creation_options: publicKey: challenge: pz6ZOb3m7DnCLh+r7jFBymXY4N1Opz99hzAiVTTsRxU= rp: name: My App id: localhost user: name: John Smith displayName: John id: dXNlcl8yNmw3ZGJmQVk1OWZ0ZWptbTZtM09UZjRvejE= pubKeyCredParams: - type: public-key alg: -7 authenticatorSelection: authenticatorAttachment: platform userVerification: discouraged timeout: 60000 excludeCredentials: - type: public-key id: >- AQIWquELcChySRRIz9LpkduwNywFhzzKxsZye7Ms/t1noz72KiECL7tNSehkJGRwK22tlPdUBddfnyvjXQtfAJGa6oQ68D0LYLZlIleHyCin89yyZaZ9 user_id: user_24wFP9pDa9YiMJLun94iKykoZs2 components: schemas: BeginWebAuthnRegistrationRequest: description: '' type: object properties: domain: type: string minLength: 1 description: >- `Required` Domain of the app that will be using WebAuthn to provide user sign in. user_id: type: string minLength: 1 description: >- `Required` User ID of the user to attach this WebAuthn registration to. authenticator_type: type: string minLength: 1 description: >- `Optional` The intended authenticator type for the WebAuthn device used. `cross-platform` is recommended for portable WebAuthn device like YubiKey and `platform` if you want to enable log in via platform specific methods such as FaceID or TouchID. Possible values: platform, cross-platform. Defaults to platform. required: - domain - user_id securitySchemes: Authorization: type: http scheme: bearer description: >- Auth Platform API includes all the Auth related features. All Users, Phone Numbers, Emails, and OTPs are associated with an `App` as the container. Endpoints only accept App's `Secret API keys` other than certain endpoints that are used client side or via SDK that accept the `public_token`. ## Authentication using App Api Key ## Header: ``` Authorization: Bearer {api_key} ``` ## Authenticated Request ```curl curl \ -X GET https://api.moonkey.fun/v1/auth/users/user_24wFP9pDa9YiMJLun94iKykoZs2 \ -H "Authorization: Bearer sk_test_pRqweh3wvWmJAAVYv7Z0T5iPLzFM4ql0muoyQcjOxGeN3p1r" ``` ````