🛠 Free Crypto Tools

26 free tools for crypto users. No signup, no wallet connect, no payments. Just useful data.

All Free Tools

📊 x402 Crypto Price API — Compare & Save 5x

minia2a ($0.002) vs CoinGecko x402 ($0.01). Side-by-side pricing, coverage, features. Free, no signup.

🆓 Free Crypto APIs — No Key Required

6 free JSON APIs: crypto prices, Polymarket odds, gas tracker. Copy-paste curl examples. No signup.

Crypto Dashboard

Live crypto prices, gas fees, GitHub trending. All-in-one free dashboard.

/dashboard.html

Gas Tracker Dashboard

Live gas fees across Ethereum, Base, Arbitrum, Optimism, Polygon. Real-time updates.

/gas-dashboard.html

⛽ Gas Price Widget (Embeddable)

Compact iframe widget — live gas across 7 chains. Copy-paste embed, auto-refreshing. Free.

/gas-widget.html

🔧 MCP Tool Directory

Searchable directory of MCP-compatible tools and AI agent services. JSON API + web UI. Free.

/mcp-tools.html

Token Security Scanner

Check any token for honeypot risk, liquidity lock, ownership renounced, buy/sell tax.

/token-scanner.html

Token Launch Scanner

New Base chain tokens — live prices, volume, liquidity, instant security checks. Free.

/token-launch-scanner.html

Decode EVM transaction hash — from, to, value, gas, status, input data, logs.

/tx-decoder.html

Wallet Portfolio Viewer

Check any EVM wallet balance across 5 chains. ETH + ERC-20 tokens.

/wallet-viewer.html

💼 Portfolio Value Tracker

Enter any wallet address — see ETH balance + USD value on Base + Ethereum. Free, no signup.

/portfolio.html

Forward and reverse ENS resolution. .eth name → address, address → .eth name.

/ens-resolver.html

EVM Unit Converter

Wei ↔ Gwei ↔ Ether ↔ Szabo ↔ Finney. Instant conversion.

/unit-converter.html

USDC Gas Calculator

Compare USDC transfer costs across 6 chains. Find cheapest chain to send.

/usdc-gas-calculator.html

Test all 28 paid APIs live. See responses, get curl commands. Free to explore.

/playground.html

Compare two texts side-by-side. Unified or inline diff format. Runs in browser, no data sent.

Polymarket Scanner

Live Polymarket odds. Extreme prices, high volume, near-expiry. Find mispriced prediction markets.

/polymarket-dashboard.html

Polymarket Odds Badges

Free embeddable SVG badges for any Polymarket market. Copy-paste Markdown/HTML. Auto-updating.

/poly-embed.html

Crypto Price Badges

Free embeddable SVG badges for BTC, ETH, SOL + 9 more. Live prices in READMEs, blogs, forums.

/price-embed.html

🔍 DEX Arbitrage Scanner

Live Base chain cross-DEX price spreads. Find arb opportunities across Uniswap, Aerodrome, PancakeSwap. Updated every 5 min.

🔍 DEX Arbitrage Scanner (Live)

Same as above — alternate path. Cross-DEX arb finder with live data, no .html extension.

Polymarket Extreme Odds API

Real-time extreme-odds JSON API. Sort by probability distance, volume, or expiry. Free for agents.

Crypto Price Feed

Real-time BTC, ETH, SOL + 7 more (JSON API). Free, no payment needed.

Complete x402 ecosystem overview: providers, directories, SDKs, settlement chains.

☁️ Cloudflare Wallets Guide

Cloudflare Wallets for AI agents. Pay for APIs with USDC via x402. Launched Aug 4, 2026.

/cloudflare-wallets

API Catalog (JSON)

Full 32-service catalog with prices, routes, descriptions. Machine-readable.

💰 Also check our 32 paid APIs for AI agents — crypto prices, wallet scanning, CAPTCHA solving, web scraping, and more via x402 micropayments from $0.001/call.