Locate a free open-access PDF for a DOI. Returns whether an open-access copy exists and the best PDF link with its license, version and host type, from Unpaywall and OpenAlex. A cheap, focused open-access locator.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.008000 USDC | 0xF22e...f493 |
| Polygon | exact | $0.008000 USDC | 0xF22e...f493 |
| Arbitrum One | exact | $0.008000 USDC | 0xF22e...f493 |
| eip155:480 | exact | 0.01 tokens | 0xF22e...f493 |
| solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp | exact | 0.01 tokens | AytHnv...8R1u |