The latest block number on Ethereum, Base, Polygon, Arbitrum or Optimism from keyless public nodes with fallback. Use it as the cheapest possible on-chain read: a liveness check for a chain, a timestamp anchor for a query, or the first paid call to prove an x402 client works end to end.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.001000 USDC | 0xaBF4...a9D0 |
| Polygon | exact | $0.001000 USDC | 0xaBF4...a9D0 |
| Arbitrum One | exact | $0.001000 USDC | 0xaBF4...a9D0 |
| eip155:143 | exact | 0.00 tokens | 0xaBF4...a9D0 |
| eip155:43114 | exact | 0.00 tokens | 0xaBF4...a9D0 |
| eip155:1329 | exact | 0.00 tokens | 0xaBF4...a9D0 |
| Optimism | exact | $0.002000 USDC | 0xaBF4...a9D0 |
| eip155:4663 | exact | 0.00 tokens | 0xaBF4...a9D0 |
| Celo | exact | 0.00 tokens | 0xaBF4...a9D0 |
| Base | upto | $0.001000 USDC | 0xaBF4...a9D0 |
| solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp | exact | 0.00 tokens | J7aN3P...3xwg |
| stellar:pubnet | exact | 0.01 tokens | GDNJXC...WWRL |
| algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8= | exact | 0.00 tokens | C7IIHG...2XIE |