Base Verify API

Base Verify lets users prove that they control verified accounts without exposing their credentials to your application. Use it to add Sybil resistance, prevent duplicate participation across wallets, and gate actions on verified traits.

Choose an Integration

Verify Social Accounts

Check verified account ownership and traits in your application backend.

Verify Users Onchain

Enforce identity deduplication and eligibility policies directly in a smart contract.

How the Integrations Differ

	Verify Social Accounts	Verify Users Onchain
Enforcement	Your application backend	Your smart contract
Base surface	Base Verify REST API	Base Verify REST API and onchain contracts
Result	Verification token and traits	Signed `identityHash`, expiration, and signature
Best for	Gated application experiences, rewards, and backend-controlled claims	Contract-level claims, deposits, mints, votes, and other onchain actions
Application backend	Required	Not required at claim time

Both integrations use a wallet-signed SIWE message as proof that the requester controls the wallet. Base Verify evaluates the requested provider or policy and returns only the verification data needed for the selected flow.

Authenticate Users

Connect a wallet and authenticate users with Base Account.

Sign and Verify Typed Data

Collect and validate wallet signatures in your application.

Overview

CLIs

Base Chain API

Base Account SDK

Base MCP

Base Verify API

Choose an Integration

Verify Social Accounts

Verify Users Onchain

How the Integrations Differ

Authenticate Users

Sign and Verify Typed Data

​Choose an Integration

Verify Social Accounts

Verify Users Onchain

​How the Integrations Differ

​Related Resources

Authenticate Users

Sign and Verify Typed Data

Choose an Integration

How the Integrations Differ

Related Resources