Space Markets Index (SMI) by SMX / Space Markets: orbital launch activity from public data. Weekly 2026 launch series, per-launch records (rocket, mission, payloads, mass status) and SMI prints, as small JSON. Each read costs $0.01 test USDC via x402 on Base Sepolia (testnet). Data: GCAT (J. McDowell, planet4589.org), CC BY 4.0, modified by Space Markets. Not affiliated with or endorsed by SpaceX. Data only, not advice. Free: /smi/latest
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base Sepolia | exact | $0.01 USDC | 0x5799...E0e9 |