ISBN check, validate an ISBN. Check an ISBN-10 or ISBN-13 check digit and convert valid ISBN-10s to ISBN-13. Hyphens and spaces are ignored. Use before cataloguing or ordering books.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.002000 USDC | 0x2074...77f5 |
| Polygon | exact | $0.002000 USDC | 0x2074...77f5 |
| Arbitrum One | exact | $0.002000 USDC | 0x2074...77f5 |
| solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp | exact | 0.00 tokens | 82wfSC...a9Q6 |