Northwind Insurance · Staging
What WhatsOnChain sells, what this organisation has, and how each one is running.
Blocks, transactions, addresses and script history over REST and WebSocket.
The API WhatsOnChain has always served. Reads are counted per request against your plan's per-second and per-day limits, and every key is bound to one network so a testnet call can never reach mainnet.
Anchor a SHA-256 hash on chain and get permanent, independent proof.
You send a hash, we build, sign and broadcast the transaction that commits it, and hand back a transaction id immediately. Once mined, reading the record returns a BEEF envelope: an SPV proof you keep, which verifies against the public header chain without us. Two endpoints, no wallet, no satoshis.
Resolve BRC-100 identities and DID documents recorded on chain.
Point lookup of a known identity key or DID, returning the current document and the transaction that set it. Key-gated and rate-limited like the rest of the API, and counted per lookup.
Identity lookups returning stale documents