Wallet Auth API Docs describes the InsumerAPI, an infrastructure platform for condition-based access using blockchain wallet authentication. The service enables verification of token balances, NFT ownership, and EAS attestations across 37 blockchains through a single API call. Each response is ECDSA-signed, allowing client-side verification without the need to trust the network, and supports the creation of signed boolean attestations and wallet trust profiles for various use cases.
The API is designed for a wide range of users, including merchants, token and NFT holders, foundations, and AI agents. It offers 44 curated checks across 25 chains in five dimensions, which can be expanded to 49 checks across 27 chains in nine dimensions with support for additional wallets such as Solana, XRPL, Bitcoin, and Tron. The platform supports both single and batch endpoints for generating trust profiles and fact attestations. Custom conditions can be specified, and the service provides pre-configured compliance templates for verifying KYC attestations, including integrations with Coinbase Verifications, Gitcoin Passport, and Farcaster identity.
Developers can access the API using languages such as JavaScript, Python, and through command-line tools like curl. The authentication system supports both API key-based access and wallet-based authorization for EVM agents holding an Insumer Access pass, which can be used on specific endpoints. AI agents have the ability to autonomously purchase API keys using USDC. The API provides a JWKS endpoint for public key retrieval, enabling verification of ECDSA signatures and ensuring the integrity of attestations.
The platform's architecture is built around a pipeline that reads blockchain state and outputs signed attestations, compatible with ACP and UCP protocols. It is suitable for use cases such as commerce, compliance, access control, and agent trust. Merchant onboarding is supported programmatically, allowing for domain verification, token and NFT configuration, and directory publishing without the need for a dashboard. Documentation includes a complete API reference, quickstart guides, and verification instructions.
Wallet Auth API Docs is an Infrastructure & Backend product. It provides a unified API for verifying wallet ownership, token balances, and NFT holdings across multiple blockchains. Wallet Auth API Docs is an open-source project aimed at developers building blockchain-integrated apps. The project is open source (MIT). It runs on the web, the command line, and embeddable surfaces.
Insumer builds and maintains Wallet Auth API Docs, and the product first shipped in 2026. The project is developed in the open on GitHub with 12 commits in the last 90 days. Among its 6 catalogued features are wallet authentication, multi-chain support, and NFT verification. It exposes integrations via an MCP server and a public API.
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