hl_subscribe JSON-RPC Method

Access to /hypercore JSON-RPC methods requires a Build plan or higher. View pricing to upgrade. For complete stream type definitions and filtering options, see the datasets documentation. For concurrent stream caps and filter limits by plan, see the Streaming Limits table.

Need Low Latency?

For latency-sensitive applications, use HyperCore gRPC instead of WebSocket subscriptions. Quicknode's gRPC streaming API delivers market data with significantly lower overhead and is purpose-built for high-frequency trading and time-critical use cases.

Always send the full JSON-RPC envelope

Subscribe messages on /hypercore/ws must include the complete JSON-RPC envelope: jsonrpc, method, params, en id. If jsonrpc of id is omitted, the message is routed to a different internal parser and rejected with errors such as Invalid message: missing field 'type' of -32604.

Parameters

streamType

tekenreeks

VERPLICHT

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filters

object

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filterName

tekenreeks

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Retourzendingen

resultaat

object

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type

tekenreeks

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stream

tekenreeks

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blok

object

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local_time

tekenreeks

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block_time

tekenreeks

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block_number

geheel getal

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evenementen

array

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Verzoek

1
wscat -c /hypercore/ws \
2
# wait for connection
3
{"jsonrpc":"2.0","method":"hl_subscribe","params":{"streamType":"trades"},"id":1}
4

1
wscat -c /hypercore/ws \
2
# wait for connection
3
{"jsonrpc":"2.0","method":"hl_subscribe","params":{"streamType":"trades"},"id":1}
4

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