# Block402

> Read-only Bitcoin and Ethereum mainnet RPC for AI agents: seven Bitcoin methods and 37 Ethereum methods covering balances, blocks, transactions, receipts, logs, proofs and simulations. One POST endpoint per network; JSON-RPC method and params in the body. Payments currently use test USDC on Base Sepolia through Coinbase CDP, at 0.0025–0.01 per call. Historical Ethereum state is subject to node retention; archive state is not guaranteed.

- **Domain**: `api.block402.xyz`
- **Provider**: api.block402.xyz (https://api.block402.xyz)
- **Kind**: paid_api
- **Category**: blockchain
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 0%
- **Payment protocol**: x402

## URLs
- Agent card: https://api.block402.xyz/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/api.block402.xyz
- Documentation: https://api.block402.xyz