Bybit C Client

Pure-C Bybit REST client (C11) with public and private endpoint helpers, built on libcurl + OpenSSL.

Features

• Core request signer (HMAC SHA-256) and HTTP wrapper.
• Public endpoints: server time, tickers, instruments info, orderbook, klines.
• Private endpoints: place order, cancel order, open orders, positions, wallet balance.
• Examples: public and private usage.
• Unit tests for signing, payload builders, and query builders.

Build

cmake -S . -B build
cmake --build build

Run tests

ctest --test-dir build

Examples

./build/example_public
./build/example_private   # set API key/secret in examples/private_example.c

API helpers

• Public: bybit_get_server_time, bybit_get_ticker, bybit_get_instruments_info, bybit_get_orderbook, bybit_get_kline.
• Private: bybit_place_order, bybit_cancel_order, bybit_get_open_orders, bybit_get_positions, bybit_get_wallet_balance.

Usage (snippet)

BybitClient *c = bybit_client_create("https://api.bybit.com", api_key, api_secret);
char *resp = NULL; long status = 0;
bybit_get_ticker(c, "linear", "BTCUSDT", &resp, &status);
printf("%ld %s\n", status, resp);
free(resp);
bybit_client_free(c);

Dependencies

• libcurl
• OpenSSL (crypto)

On macOS (Homebrew): brew install openssl curl.