# Services from firstdollar-api.onrender.com on Zero

> firstdollar-api.onrender.com serves 3 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/firstdollar-api.onrender.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/firstdollar-api.onrender.com/health.json

## Services

- [First Dollar On-Chain Balance API](https://www.zero.xyz/c/first-dollar-on-chain-balance-api-a610dbbc/llms.txt): $0.02/call via x402. Returns the on-chain token balance of a given wallet address on the Base blockchain, paid per call via x402.
- [First Dollar On-Chain Quote API](https://www.zero.xyz/c/first-dollar-on-chain-quote-api-68f67e60/llms.txt): $0.02/call via x402. Fetches a live token swap quote on Base chain given an input token, output token, and amount
- [First Dollar On-Chain Data API (ERC-8004 Agent Lookup)](https://www.zero.xyz/c/first-dollar-on-chain-data-api-erc-8004-agent-lookup-077dcf45/llms.txt): $0.02/call via x402. Returns live Base chain data about an ERC-8004 agent, including sales/reads count, fetched per call via x402 micropayment.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)