Register your company, generate an API key, and read balances, blocks and transactions from a simple REST API — no node to run, no raw JSON-RPC required.
Every API key is tied to a company so we can reach you about rate limits, incidents, or abuse. This is a self-service form — no manual approval, your key is issued immediately.
https://bb84.com/v1 · all endpoints require the X-API-Key header · JSON responses.Send your key on every request:
curl https://bb84.com/v1/status \ -H "X-API-Key: bb84_live_YOUR_KEY"
| Method & Path | Description |
|---|---|
| GET /v1/status | Chain ID, latest block number, current gas price |
| GET /v1/block/latest | Latest block — number, hash, timestamp, tx count |
| GET /v1/balance?address=0x.. | Native ETH balance of an address (wei + ETH) |
| GET /v1/token-balance?token=0x..&address=0x.. | ERC-20 balance of an address for any token contract |
| GET /v1/tx?hash=0x.. | Transaction details + confirmation status |
curl "https://bb84.com/v1/balance?address=0xYourAddress" \
-H "X-API-Key: bb84_live_YOUR_KEY"
# {"address":"0x...","balanceWei":"1000000000000000000","balanceEth":"1.000000000000000000"}
Lost or compromised key? Revoke it — you'll need to register a new one. Revoking requires the key itself as proof of ownership.
https://bb84.com/rpc, see the docs. For custom needs, reach out via the support button.Question, bug report or feedback — we'll get back to you by email.