SDK reference for the DAA web SDK package, which runs the Strong Customer Authentication ceremony in your web application.
The DAA web SDK handles the client-side Strong Customer Authentication (SCA)
ceremony for Digital Asset Accounts. Your backend creates a frame token through
the Circle API; the SDK uses that token to render the WebAuthn passkey prompt in
a Circle-hosted iframe and return the signed result.For a step-by-step integration guide, see
How-to: Implement Strong Customer Authentication.
attestationResponse: a structured object representing the signed WebAuthn
attestation. Pass it to your backend and forward it to
POST /v1/accounts/passkeys unchanged.
Do not re-serialize attestationResponse before forwarding it to your
backend. Re-serialization alters the binary encoding and causes a verification
error.
Both enroll and approve throw if the ceremony fails or the frame token is
invalid. Wrap calls in try/catch and surface errors to the end user.
try { const assertion = await sca.approve(frameToken, { mode: "modal" });} catch (err) { // Show an error state and allow the user to retry}
Common failure causes:
DAA error code
Numeric code
Cause
What to do
CEREMONY_CONSUMED_OR_EXPIRED
420057
Frame token already used or expired (10 min enrollment / 5 min challenge).
Fetch a new token from your backend and retry.
CEREMONY_TOKEN_REQUIRED
420056
Frame token missing or malformed.
Ensure you pass the frameToken exactly as returned by the backend.
SCA_ORIGIN_NOT_CONFIGURED
420064
Your application origin is not registered.
Contact your support team to register the origin before running any ceremony.
Cancelled
—
User dismissed the ceremony or a cancel signal fired.
Prompt the user to try again, or handle the cancellation gracefully.
Was this page helpful?
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In Claude Code: run /plugin marketplace add circlefin/skills then /plugin install circle-skills@circle. With Vercel Skills CLI: run npx skills add circlefin/skills. Available skills: use-usdc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-usdc/SKILL.md (balances, transfers, approvals on EVM and Solana); EURC has no skill — see https://developers.circle.com/stablecoins/what-is-eurc.md; bridge-stablecoin https://github.com/circlefin/skills/blob/master/plugins/circle/skills/bridge-stablecoin/SKILL.md (crosschain transfers via CCTP, USDC, EURC, and third-party assets); use-arc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-arc/SKILL.md (Arc chain config, contract deployment, USDC bridging — Arc docs: https://docs.arc.io/llms.txt); use-circle-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-circle-wallets/SKILL.md (choose wallet type); use-developer-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-developer-controlled-wallets/SKILL.md (custodial wallets for payouts and treasury); use-user-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-user-controlled-wallets/SKILL.md (embedded wallets with Web2 login); use-modular-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-modular-wallets/SKILL.md (smart contract wallets with passkeys and ERC-4337); use-gateway https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-gateway/SKILL.md (unified USDC balance, nanopayments); use-smart-contract-platform https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-smart-contract-platform/SKILL.md (deploy, interact, monitor contracts). Pair any skill with the Circle MCP server for live SDK signatures, contract addresses, and chain IDs: {\"mcpServers\":{\"circle\":{\"url\":\"https://api.circle.com/v1/codegen/mcp\"}}}.","Read the product overview first. Each product has an overview explaining when and why to use it. Read it before quickstarts.","Pick the right wallet type. Developer-controlled (you hold keys), user-controlled (end user holds keys via PIN/social login), or modular (smart contract wallets with passkeys). See https://developers.circle.com/wallets.md.","Use CCTP V2 for crosschain transfers. CCTP natively transfers USDC and EURC via burn-and-mint, and supports permissionless wrapping of third-party assets via lock-and-mint. V1 is legacy; always use V2 unless V1 is specified or the chain requires it (Noble, Sui, and Aptos still require V1). Migration guide: https://developers.circle.com/cctp/migration-from-v1-to-v2.md.","Use Bridge Kit for frontend bridging. 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