Binance Order Filters for Trading Bots
A runnable Binance Futures bot reads symbol filters, prepares BTCUSDT orders, and refreshes cached metadata without fetching exchange info before every order.
Siebly.io JavaScript SDKs | Tutorials, Guides and News
Crypto Exchange API Guides
Guides & best practices to building reliable exchange REST API and WebSocket integrations, event-driven workflows, and algorithmic systems.
Articles
41
Updated
Nov 5
Latest articles, guides, news & updates
Tutorials, guides, and news for JavaScript developers, traders & dev-traders working with cryptocurrency exchange REST APIs & WebSockets.
41 articles
Batching WebSocket UI Updates
A runnable price-board example compares rendering every message with rendering once per frame, including measurements and the limits of display batching.
Bounding a Private Account Event Consumer
A bounded serial queue keeps asynchronous account writes in arrival order and stops accepting events after overflow or a failed write.
Diagnosing Binance Signature Error -1022 in JavaScript
A read-only diagnostic separates invalid signatures from timestamp, environment, and parameter errors without logging credentials or account payloads.
Recording Public Trades with Node.js and SQLite
A bounded Bybit trade collector commits SQLite batches, skips repeated trade IDs, and records interruptions that still need historical backfill.
Deduplicating WebSocket Messages in Node.js
A repeated trade should be stored once. A later update to the same order still needs processing. Practical examples of telling them apart.
Consuming Binance miniTicker Updates in Node.js
Merge changed symbols into a bounded miniTicker table and show receipt age without treating rolling 24-hour statistics as daily bars.
A Local Crypto Price Dashboard with Node.js
Serve public Bybit ticker updates to a local browser with server-sent events, bounded connections, and visible upstream interruptions.
Validating SDK WebSocket Events at Runtime
Validate complete Bybit trade batches before recording them, preserve decimal strings and native IDs, and distinguish malformed trades from unrelated messages.
Using Siebly Skills with a Coding Agent
Load current SDK references into a coding agent, request one public-data script, and check its imports, methods, responses, and failure path.
Testnet, Demo, and Local Simulation in Node.js
Choose fixtures, a local paper executor, validation endpoints, or exchange demo services according to the behaviour being tested.
Initializing and Recovering Account State
Track which balances are initialized, distinguish an absent asset from a zero balance, and keep incoming private events available during the initial REST read.
Consuming Bybit Ticker Snapshots and Deltas
A runnable Bybit ticker consumer applies snapshots and deltas, retains decimal prices, and clears cached values when the connection is interrupted.
Building a Small Paper Execution Model in JavaScript
A runnable local executor models a buy with a spread adjustment, fees, partial fills, and an affordable-quantity limit in exact integer units.
Diagnosing Exchange Timestamp Errors in Node.js
Measure clock offset with a public server-time call and separate timestamp units, queue delay, receive windows, and client synchronization options.
HTX Linear Swaps and Cross-Margin Workflows
Match HTX linear-swap metadata, cross-margin account methods, order commands, and private topics within one contract scope.
Gate Futures Contract Sizes and Settlement Routes
Use Gate settlement routes and contract multipliers to translate an intended quantity into a supported futures order size.
OKX Perpetual Order Sizes and Position Modes
Read OKX SWAP contract units and match tdMode and posSide to the account before interpreting order quantities and results.
Bitget Futures: Classic V2 and Unified V3 Clients
Compare Bitget Classic V2 and UTA V3 client boundaries, then migrate account fields, requests, and stream parsers together.
Kraken Spot and Futures Use Different API Contracts
Compare Kraken Spot and Futures authentication, order fields, and private stream setup before selecting the derivatives client.
Migrating Coinbase Pro Code to Advanced Trade
Replace Pro-era authentication, order bodies, identifiers, and event parsers with the Advanced Trade contracts used by the target account.
Bybit Inverse Contracts: Quantities and Position Modes
Read inverse instrument metadata and match quantity units, settlement, and position mode before constructing a Bybit order.
Debugging the Bytes in an Exchange Signature
Compare synthetic Bybit and OKX signing inputs, then trace serialization, paths, timestamps, and digest encoding at the actual client boundary.
Separating Market Data, Decisions, and Execution
Follow one market observation through recording, state updates, decisions, and dispatch, with a separate queue and failure policy for each consumer.
Pre-Trade Checks and Kill Switches for Trading Bots
Reserve outstanding order capacity, block queued submissions during a halt, and track cancellation outcomes and fills without assuming the account is flat.
Diagnosing Bybit Authentication Errors in Node.js
Use one testnet account read to distinguish Bybit environment, key-type, permission, signature, and timestamp failures.
Handling Exchange API Rate Limits in Node.js
Why a request queue can still hit a rate limit, how to pace weighted requests, and what to do when an exchange rejects a call.
Checking Bybit Unified Account Compatibility
Inspect Bybit account status and margin mode, then verify wallet fields and product compatibility before migrating consumers.
Kraken Nonces Across Node.js Workers
Keep Kraken Spot nonce allocation and dispatch under one owner per key, including restarts and requests that arrive out of order.
Fetching Closed Candles for a JavaScript Backtest
Download six hours of closed one-minute Binance candles, check every expected slot, and save the source parameters with the dataset.
Awaiting WebSocket Replies in Node.js
Correlate concurrent WebSocket replies, distinguish request completion from fills, and handle a missing reply without resubmitting an unresolved order.
Consuming Coinbase Market and User WebSocket Feeds
Subscribe to Coinbase user events with the SDK while tracking market connectivity, user subscriptions, and account recovery separately.
HTTP and SOCKS Proxies with Siebly SDKs
Configure HTTP and SOCKS proxy agents at the REST and WebSocket boundaries, including internal token requests used by private streams.
Testing Exchange Connectors Without Live Orders
Runnable Node.js tests cover one-send dispatch, intent ID collisions, lost replies, and cumulative order progress without placing live orders.
Handling Order Acknowledgements, Fills, and Timeouts
Keep acceptance, cumulative fills, and cancellation outcomes separately so late replies and reconnects cannot reset established order progress.
Binance User Data Stream 410 Gone: Fix Spot listenKey in JavaScript
Replace retired Spot listenKey startup with the SDK WebSocket API subscription, keep product routing distinct, and recover account state after reconnects.
WebSocket Reconnects and Backfill
Recovering missed trades and account state after a disconnect, with examples of overlapping history and live data, partial fills, and delayed updates.
Binance, Bybit, and Coinbase Connector Boundaries
Compare three concrete product routes, map native client IDs, and test request translation without hiding unsupported account operations.
A Public-Data First Bot Program in Node.js
Record three public Bybit price observations and their decisions, then replay the saved inputs before adding a state consumer or executor.
Choosing a JavaScript Exchange SDK
Evaluate an SDK against one account workflow, including response fields, subscription failures, reconnect recovery, and unsupported operations.
What an Exchange SDK Handles
Compare the SDK signing and connection layer with application-owned pagination, request budgets, order identity, and state recovery.