LLM-powered wallet agent for Coinbase CDP
The Challenge
The client needed a natural-language interface for Coinbase CDP wallet operations. Every existing reference implementation was either a toy demo with no safety controls, or a raw API wrapper with no intelligence. The real challenge was combining LLM reasoning with blockchain operations in a way that was actually safe for production — where an unchecked agent action has irreversible financial consequences.
Our Approach
We inverted the typical AI-first build order: guardrails came before capabilities. Transaction limits, action confirmation steps, and protected backend endpoints were defined and enforced before any intelligence was layered on. This meant the system defaulted to safe behavior by design, and the LLM's role was to assist within clearly defined bounds rather than act autonomously. Each agent action is logged end-to-end for audit.
What We Built
- •LLM agent orchestration for natural language wallet and transaction commands
- •Coinbase CDP wallet creation, management, and balance queries
- •On-chain transaction execution with explicit confirmation flows
- •Multi-tier safety guardrails including transaction limits and operation whitelisting
- •Authentication middleware protecting all state-changing REST endpoints
- •Full audit logging for every agent action and on-chain operation
The Results
- ✓Natural language interface for wallet creation and on-chain transactions
- ✓Zero unauthorized transactions — multi-tier guardrail system enforced throughout
- ✓Full audit log of every agent action for compliance and review
- ✓Protected REST endpoints with authentication middleware on all state-changing operations
