Crypto trading API: REST, WebSocket and SDKs

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API

REST for state, WebSocket for the tape, SDKs for the rest. The same prices and the same fees as the app, with keys you can scope to read, trade or withdraw.

Get an API key API status

Latency 01234567890123456789 ms

curl https://api.halyard.exchange/v1/markets/BTC-USD \
  -H "X-API-Key: $HALYARD_KEY"

{
  "pair": "BTC-USD",
  "last": 67412.80,
  "bid": 67411.10,
  "ask": 67414.30,
  "change24h": 2.41,
  "volume24h": 184200000
}

Endpoints

MethodEndpointWhat it does
GET/v1/marketsList every market with price and 24h stats
GET/v1/markets/{pair}One market, best bid and ask
GET/v1/orderbook/{pair}Order book to a depth you choose
GET/v1/trades/{pair}Recent trades
POST/v1/ordersPlace a market or limit order (signed)
DELETE/v1/orders/{id}Cancel an order (signed)
GET/v1/balancesBalances per asset (signed)
GET/v1/earn/productsEarn products and live APY

Rate limits

Public600 per minute
Signed300 per minute
WebSocket100 subscriptions

Per key, per minute, with a burst of 20 per second. Limits reset on a rolling window; the headers tell you what is left.

API

REST for state, WebSocket for the tape, SDKs for the rest. The same prices and the same fees as the app, with keys you can scope to read, trade or withdraw.

Get an API key API status

Latency 01234567890123456789 ms

curl https://api.halyard.exchange/v1/markets/BTC-USD \
  -H "X-API-Key: $HALYARD_KEY"

{
  "pair": "BTC-USD",
  "last": 67412.80,
  "bid": 67411.10,
  "ask": 67414.30,
  "change24h": 2.41,
  "volume24h": 184200000
}

Endpoints

MethodEndpointWhat it does
GET/v1/marketsList every market with price and 24h stats
GET/v1/markets/{pair}One market, best bid and ask
GET/v1/orderbook/{pair}Order book to a depth you choose
GET/v1/trades/{pair}Recent trades
POST/v1/ordersPlace a market or limit order (signed)
DELETE/v1/orders/{id}Cancel an order (signed)
GET/v1/balancesBalances per asset (signed)
GET/v1/earn/productsEarn products and live APY

Rate limits

Public600 per minute
Signed300 per minute
WebSocket100 subscriptions

Per key, per minute, with a burst of 20 per second. Limits reset on a rolling window; the headers tell you what is left.

API

REST for state, WebSocket for the tape, SDKs for the rest. The same prices and the same fees as the app, with keys you can scope to read, trade or withdraw.

Get an API key API status

Latency 01234567890123456789 ms

curl https://api.halyard.exchange/v1/markets/BTC-USD \
  -H "X-API-Key: $HALYARD_KEY"

{
  "pair": "BTC-USD",
  "last": 67412.80,
  "bid": 67411.10,
  "ask": 67414.30,
  "change24h": 2.41,
  "volume24h": 184200000
}

Endpoints

MethodEndpointWhat it does
GET/v1/marketsList every market with price and 24h stats
GET/v1/markets/{pair}One market, best bid and ask
GET/v1/orderbook/{pair}Order book to a depth you choose
GET/v1/trades/{pair}Recent trades
POST/v1/ordersPlace a market or limit order (signed)
DELETE/v1/orders/{id}Cancel an order (signed)
GET/v1/balancesBalances per asset (signed)
GET/v1/earn/productsEarn products and live APY