Introduction
Sona Intel is a free HTTP API and website for onchain intelligence. You send a GET request and get JSON back. There is no API key and no sign-up.
What Sona serves
| Area | What you get | Chains |
|---|---|---|
| x402 payments | Facilitators, sellers, payers, every payment and how much volume looks genuine | Monad, Base |
| Perpl risk | Liquidation maps, stress tests, concentration, liquidations, funding and a risk card per wallet | Monad |
| Prediction markets | Polymarket trader records, leaderboards, calibration, and the busiest live markets and largest recent trades | Polygon history, not chain-scoped |
| Tokens and holders | Token pages, holders, transfers, holder maps and price charts | Ethereum, Monad, Arc |
| DeFi and markets | TVL, protocols, stablecoins, DEX volume, daily activity and the largest coins | Ethereum, Monad, Arc |
| Explorer | Blocks, transactions, addresses, search and chain status | Ethereum, Monad, Arc |
Sona only serves data. It never sends a transaction, and a request that carries a payment header is refused.
How these docs are organised
- Get started explains the rules every route shares: limits, the response envelope, errors, IDs and caching.
- Data covers one area per page, with what each answer means and how to read it.
- API reference lists every endpoint with its parameters, a response example and ready-to-run snippets.
Start with the Quickstart. Every request in these docs runs against https://api.sonaintel.com.
Next steps
- Quickstart sends the first request.
- Limits and credits explains what the free tier allows.
- API reference documents every endpoint.