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Siebly.io

Build crypto exchange API integrations with Codex, Claude Code, and Cursor using JavaScript SDKs for Binance, Bybit, Kraken, Coinbase...

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Description

Build crypto exchange API integrations with Codex, Claude Code, and Cursor using JavaScript SDKs for Binance, Bybit, Kraken, Coinbase, and more.

About Siebly.io

What is Siebly.io?

Siebly.io is a collection of open-source TypeScript and JavaScript SDKs for cryptocurrency exchange REST APIs and WebSockets.

What Siebly.io does

Siebly.io provides open-source TypeScript and JavaScript SDKs for cryptocurrency exchange REST APIs and WebSockets. It covers 10 exchanges including Binance, Bybit, OKX, Gate, Bitget, KuCoin, Coinbase, Kraken, HTX, and Hyperliquid. Each SDK wraps authenticated trading endpoints, market data streams, order management, and WebSocket reconnects into typed functions across Node.js, Bun, and Deno runtimes.

Who Siebly.io is for

Algorithmic traders and JavaScript developers building cryptocurrency exchange REST and WebSocket integrations.

Key features

  • Provides 10 dedicated exchange SDKs with full TypeScript support, covering Binance, Bybit, OKX, Gate, Bitget, KuCoin, Coinbase, Kraken, HTX, and Hyperliquid.
  • Supports authenticated trading endpoints, spot, margin, futures, options, public market data, and account management.
  • Manages WebSocket connections with automated reconnect handling, heartbeats, subscription routing, and order execution via WebSocket APIs.
  • Operates across modern JavaScript runtimes including Node.js, Bun, and Deno with minimal external dependencies.
  • Employs tokenless package releases with provenance metadata, dependency scanning, and OIDC on npm.
  • Works without credentials for public market data, while accepting API keys via constructor parameters for private operations.

Facts from siebly.io, checked 8 November 2026

  • All SDKs are completely free and open-source under npm packages.
  • Features dedicated packages for 10 cryptocurrency exchanges with TypeScript definitions.
  • Works across Node.js, Bun, and Deno environments.
  • Signed releases include provenance metadata linked to GitHub commits.

Written from Siebly.io's own website (Homepage, Docs). The maker can claim this listing to edit it.

Categories

Developer ToolsCrypto & Web3AI & Machine Learning

Frequently asked questions

Is Siebly free to use?

Yes, all SDKs are open-source and free to use for personal and commercial projects without licensing fees.

Which cryptocurrency exchanges are supported?

The collection includes 10 exchange SDKs: Binance, Bybit, OKX, Gate, Bitget, KuCoin, Coinbase, Kraken, HTX, and Hyperliquid.

Which JavaScript runtimes work with the SDKs?

The SDKs support modern JavaScript runtimes including Node.js, Bun, and Deno.

Do I need API keys to access public market data?

No, public market data endpoints work without API credentials. Credentials are only required for account management and authenticated trading.

How are sensitive credentials managed?

The SDK never persists keys. Credentials are injected at runtime via environment variables, KMS, or vaults, and requests are signed in memory.

What packages are used for network requests?

Most SDKs rely on common dependencies like axios for HTTP requests and ws for WebSocket connections, utilizing Web Crypto for request signing.

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