[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [WebAuthn](./puppeteer.protocol.webauthn.md) > [Credential](./puppeteer.protocol.webauthn.credential.md) > [rpId](./puppeteer.protocol.webauthn.credential.rpid.md) ## Protocol.WebAuthn.Credential.rpId property Relying Party ID the credential is scoped to. Must be set when adding a credential. Signature: ```typescript rpId?: string; ```