7 posts tagged with "Tutorial"

A BSC memecoin sniper bot watches PancakeSwap and other BSC DEXes for newly-added liquidity pairs, then races to buy a small position before the token pumps or rugs. BSC remains the highest-volume memecoin chain in 2026 — over $1.5B in daily DEX volume according to DefiLlama, with hundreds of new tokens listed every week. Building a sniper requires three things: a mempool or events listener for new pairs, a swap API that handles the BSC decimals gotcha (USDT and USDC are 18 decimals on BSC, not 6), and a slippage-tolerant executor that retries on revert. Using swapapi.dev removes the auth and rate-limit pain — one GET request per quote, no API key, supports BSC (chain ID 56) natively.

This guide walks through a production-quality BSC sniper in TypeScript using viem and swapapi.dev. By the end you'll have a ~250-line Bun script that detects new pairs, checks safety conditions, and executes with the slippage retry pattern.

The best DCA bot strategy in 2026 is one that runs as a scheduled job without human intervention — which means the swap API it calls must require no API key and no account. Dollar-cost averaging (DCA) is the most-executed automated strategy in crypto: cron-triggered swaps that buy a fixed dollar amount on a fixed cadence, regardless of price. On-chain DCA vaults collectively hold over $1.2 billion in TVL across EVM chains, and the vast majority of those positions are driven by scheduled bots running weekly or daily swaps. The blocker for most DIY DCA bots has historically been the swap API — rate limits, key rotation, and auth headers turn a simple cron job into a maintenance burden.

Using swapapi.dev as the swap backend removes that entire category of pain: one GET request, calldata back, submit. This guide ranks 5 DCA strategies by risk-adjusted performance, shows the code for each, and ends with a production-ready Bun cron that runs unattended.

Building a crypto arbitrage bot across EVM chains comes down to three things: quotes from every chain in parallel, a fast comparison loop that spots price gaps larger than fees, and a slippage-tolerant executor that actually lands the trade before the gap closes. Arbitrage windows on EVM chains typically last under 30 seconds on majors and 2-10 seconds on L2s, which means your bot's latency budget is tight — every extra HTTP round-trip is another trade lost. Using swapapi.dev as the swap backend removes two of the biggest latency sources: no API key to validate, no account rate limits to juggle. One GET request per chain, calldata back, submit.

This guide walks through a production-quality arbitrage bot in TypeScript that scans the same trading pair across Ethereum, Base, Arbitrum, Optimism, and Polygon in parallel, ranks the opportunities, and executes with the slippage retry pattern. By the end you'll have ~250 lines of Bun + viem code that you can deploy and start scanning.

Building an AI agent for memecoin trading comes down to four pieces: an LLM that picks what to trade, a swap API that returns executable calldata, a wallet that signs transactions, and — most importantly — a slippage retry loop that handles the inevitable reverts. Memecoin volume on Ethereum and Base routinely exceeds $2 billion per day, and the share handled by autonomous agents is growing fast. But memecoins revert constantly: they're volatile, many charge transfer taxes, and the first quote you get is rarely the price you actually execute at. This guide walks through a production-quality AI memecoin trading agent in TypeScript, using swapapi.dev as the swap backend because it's the only aggregator that requires no API key — meaning your agent can self-execute without a human onboarding step.

By the end, you'll have a ~200-line Bun script that takes an LLM decision, fetches a quote, retries on revert with escalating slippage, and enforces safety guardrails like max position size and a token blacklist.

Telegram has over 1 billion monthly active users, and crypto trading bots are one of the fastest-growing categories on the platform. Bots like Banana Gun and Trojan have processed over $40 billion in cumulative swap volume, proving that users want to trade tokens without leaving their chat window. Adding token swaps to your own Telegram bot is simpler than you think: a single GET request to swapapi.dev returns ready-to-execute calldata, no API key required.

This guide walks you through building a Telegram bot in TypeScript that fetches swap quotes, displays them to users, and submits on-chain transactions — all from a /swap command.

This guide walks you through building a production-ready crypto trading bot using swapapi — the only DEX aggregator API that requires no API key or authentication.

TL;DR​

You can swap any ERC-20 token on 46 EVM chains with a single GET request to swapapi. No API key, no SDK, no account. The response includes executable calldata ready for on-chain submission.