Realtime SSE

The realtime HTTP service implements:

Method	Path	Response
GET	`/healthz`	`text/plain` process liveness
GET	`/events`	`text/event-stream` live trade stream

Each market message uses event type trade, deterministic SSE id, and JSON data:

event: trade
id: 5042002:0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:4
data: {"identity":"5042002:0xaaaa...:4","chain_id":5042002,"token":"0x1111...","market":"0x2222...","source":"curve","side":"buy","block_number":60000000,"block_timestamp":1800000000,"transaction_hash":"0xaaaa...","log_index":4,"removed":false,"received_at":"2026-01-01T00:00:00Z","token_amount_raw":"1000000000000000000","usdc_amount_raw":"1000000000000000000","usdc_decimals":18,"raw_fields":{}}

The example is abbreviated and illustrative. source is curve or uniswap_v3; usdc_decimals is respectively 18 or 6. removed: true retracts the event with the same identity. There is no historical replay and Last-Event-ID is not replayed. Heartbeats are : ping comments. Browser origins must match the configured allowlist. Use canonical token/chart/trade API snapshots to recover gaps and retire provisional events.

Overview

Protocol

Using Cooket

Developers

API Reference

Security

Reference