Blockchain.com

Channels

• /inv#addr_sub
  Stream of transactions involving a specific Bitcoin address. The `addr` parameter is required and identifies the address being watched. Subscribe with `{"op":"addr_sub","addr":"$bitcoin_address"}`; un
  Blockchain.com WebSocket APIs
• /inv#blocks_sub
  Stream of newly mined Bitcoin blocks. Subscribe with `{"op":"blocks_sub"}`; unsubscribe with `{"op":"blocks_unsub"}`.
  Blockchain.com WebSocket APIs
• /inv#op_return_sub
  Stream of transactions containing OP_RETURN outputs (arbitrary data embeds).
  Blockchain.com WebSocket APIs
• /inv#ping
  Generic connection-keepalive ping. Send `{"op":"ping"}` to keep the connection open.
  Blockchain.com WebSocket APIs
• /inv#ping_block
  Debug ping that requests the latest block observed by the server.
  Blockchain.com WebSocket APIs
• /inv#ping_tx
  Debug ping that requests the latest transaction observed by the server.
  Blockchain.com WebSocket APIs
• /inv#unconfirmed_sub
  Stream of all new unconfirmed Bitcoin transactions broadcast to the network. Subscribe with `{"op":"unconfirmed_sub"}`; unsubscribe with `{"op":"unconfirmed_unsub"}`.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#auth
  Authenticates the WebSocket connection using an API secret as `token`. As an alternative, a connection may set the `auth_token` cookie header at handshake time, in which case authentication happens au
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#balances
  Authenticated channel that emits a `snapshot` of the user's balances on initial subscription and again on every balance change. Zero balances are omitted from the initial snapshot.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#heartbeat
  Server-pushed heartbeat sent every 5 seconds after subscription.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#l2
  Level 2 (price-aggregated) order book per symbol. Each entry has price (`px`), aggregated quantity (`qty`), and order count (`num`). Updates with `qty:0` indicate the price level should be removed.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#l3
  Level 3 (order-by-order) book per symbol. Each entry has order `id`, `px`, and `qty`. Updates with `qty:0` indicate the order should be removed.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#prices
  Candlestick (OHLCV) market data per symbol. Subscriptions require `granularity` in seconds; supported values are 60, 300, 900, 3600, 21600, 86400. Updates contain a `price` array: [timestamp, open, hi
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#symbols
  Symbol reference data: a snapshot of all trading symbols with their currency, scale, order size limits, status (open / close / suspend / halt / halt-freeze), and any auction details. Subsequent update
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#ticker
  Ticker snapshot for a symbol: 24-hour reference price, 24-hour volume, and last trade price.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#trades
  Per-symbol stream of executed trades on the Exchange, including side, size, price, and `trade_id`.
  Blockchain.com WebSocket APIs
• /mercury-gateway/v1/ws#trading
  Authenticated trading channel. Subscribers receive an initial snapshot of live orders and execution-report updates thereafter. The channel supports the following actions: `NewOrderSingle`, `CancelOrde
  Blockchain.com WebSocket APIs