What is BuildAWallet and What Does It Do?

Written by the team at cytd.aiOct 06, 2026

BuildAWallet is a specialized platform that allows users to design custom self-custody crypto wallets for humans and provides paid API endpoints for autonomous AI agents. It bridges personal financial management and automated agent operations. This guide covers wallet design, agent endpoints, and policy-controlled signing.

Crypto Wallet Design

BuildAWallet empowers users to create wallets tailored to their specific needs. Unlike generic wallets, this platform offers a visual studio where you can customize the interface, assets, and security settings. You can choose from various styles, such as Minimal, Trader, or Neon, to match your preferences. The design process is intuitive and allows for deep customization of the user experience.

Customization Options

Deployment and Installation

Once designed, the wallet can be deployed as a web application or an Android build. The Android build wraps the web wallet in a WebView, allowing users to create or restore their wallet on their device. This flexibility ensures that users can access their wallet on multiple platforms while maintaining consistent functionality and security.

Agent Endpoints

BuildAWallet provides paid API endpoints for autonomous AI agents. These endpoints allow agents to read balances, prepare transactions, and interact with multiple blockchains. The API is designed to be machine-readable and discoverable, making it easy for agents to integrate with the platform. Agents can use prepaid units to access these services without requiring a traditional checkout process.

API Access and Discovery

Agents can discover the available services by reading standard machine-readable manifests, such as /llms.txt or /openapi.json. This ensures that agents can easily identify and use the correct endpoints for their needs. The API supports multiple chains, including EVM, Solana, Bitcoin, and Tron, providing a unified interface for diverse blockchain interactions.

Prepaid Units and Billing

Agents can purchase prepaid API units using USDC on Base or Solana. These units are deducted from the agent's account as it makes API calls, eliminating the need for per-transaction blockchain payments. This model simplifies billing and ensures that agents can operate efficiently without complex payment integrations.

Policy Controlled Signing

BuildAWallet emphasizes user control and policy-controlled signing. This means that users can define specific rules and permissions for their wallets, ensuring that transactions are only executed under certain conditions. This feature enhances security by preventing unauthorized actions and providing users with granular control over their funds.

Security and Custody

The platform is non-custodial by default, meaning that users retain control of their private keys. BuildAWallet does not hold user keys or funds, ensuring that users have full custody of their assets. This design philosophy aligns with the core principles of self-custody in the crypto ecosystem, providing users with peace of mind and security.

Transaction Preparation and Broadcasting

Agents can use the API to prepare unsigned transactions and broadcast them after local signing. This ensures that the private keys never leave the user's device, maintaining the highest level of security. The API reserves units for broadcast attempts, including rejected ones, ensuring that users are only charged for successful operations.

Key Takeaways

BuildAWallet allows users to design custom self-custody wallets with extensive customization options.
The platform provides paid API endpoints for autonomous AI agents to interact with multiple blockchains.
Policy-controlled signing ensures that transactions are only executed under user-defined conditions.
Agents can use prepaid units to access API services without per-transaction blockchain payments.
The platform is non-custodial, ensuring that users retain full control of their private keys and funds.
BuildAWallet supports multiple chains, including EVM, Solana, Bitcoin, and Tron.
The API is machine-readable and discoverable, making it easy for agents to integrate.
Users can deploy their wallets as web applications or Android builds for cross-platform access.

Frequently Asked Questions

What is BuildAWallet?

BuildAWallet is a specialized platform that allows users to design custom self-custody crypto wallets for humans and provides paid API endpoints for autonomous AI agents.

How does BuildAWallet handle custody?

BuildAWallet is non-custodial by default, meaning that users retain control of their private keys and funds. The platform does not hold user keys or funds, ensuring full custody for the user.

What are agent endpoints?

Agent endpoints are paid API endpoints provided by BuildAWallet that allow autonomous AI agents to read balances, prepare transactions, and interact with multiple blockchains.

How do agents pay for API access?

What is policy-controlled signing?

Policy-controlled signing is a feature that allows users to define specific rules and permissions for their wallets, ensuring that transactions are only executed under certain conditions.

Which chains does BuildAWallet support?

BuildAWallet supports multiple chains, including EVM, Solana, Bitcoin, and Tron, providing a unified interface for diverse blockchain interactions.

Can I deploy my wallet as an Android app?

Yes, BuildAWallet allows users to deploy their wallets as Android builds. The Android build wraps the web wallet in a WebView, allowing users to create or restore their wallet on their device.

How do agents discover the available API services?

Conclusion

BuildAWallet is a versatile platform that caters to both human users and autonomous AI agents. It provides tools for designing custom self-custody wallets and paid API endpoints for agent operations. By emphasizing user control and policy-controlled signing, BuildAWallet ensures security and flexibility. To explore the platform, visit BuildAWallet.