web3-identity-auth

To implement Sign-In with Ethereum (SIWE), you need a backend flow for nonce handling, message verification, and issuing JWT session tokens. This framework provides the end-to-end workflow for secure wallet authentication using FastAPI and Pydantic.

ENS resolution maps human-readable names to Ethereum addresses and performs reverse lookups. Using the web3 and ens libraries in Python, you can securely resolve decentralized identities and map addresses back to human-readable names.

Yes, FastAPI can be used for Web3 session management by handling nonce verification and issuing JWT-based session tokens. Combined with Pydantic for data validation, it creates persistent, secure logins for authenticated wallet users.

Yes, SIWE authentication requires strict backend nonce handling to prevent replay attacks. The server must generate, track, and verify unique nonces during the wallet signing process before issuing any verifiable credentials or session tokens.

You can integrate Web3 identity authentication into API endpoints by running authentication-aware agents that validate wallet-based login flows. The framework demonstrates integrating SIWE verification and JWT session validation directly into your API routes.

Decentralized identity for agent authentication requires continuous backend verification, strict nonce handling, and robust session management to prevent replay attacks. You must ensure your ENS resolution and SIWE message verification logic remains synchronized across distributed agents.