# x402 API Marketplace — klymax402.com
> 100 monetized APIs for AI agents via x402 protocol (USDC micropayments on Base L2)
> All APIs accept payment-signature header. Endpoint /mcp for MCP SSE clients.


## Toolkit Bundles

Pre-composed bundles of APIs for common agent use cases. Each bundle is a curated subset chainable in a few lines of code.

- [Crypto Trading Agent Toolkit](https://klymax402.com/bundles/crypto-trading): 10 APIs for DEX quotes, perp funding, token safety, yields. ~$0.08 USDC per cycle.
- [B2B SDR Agent](https://klymax402.com/bundles/b2b-sdr): 6 APIs for lead enrichment (email + person + tech + company + social). ~$0.06 USDC per cycle.
- [SEO Research Toolkit](https://klymax402.com/bundles/seo-research): 5 APIs for full domain audit (SEO + keywords + intel + scrape + screenshot). ~$0.04 USDC per cycle.
- [Security Audit Toolkit](https://klymax402.com/bundles/security-audit): 6 APIs for GDPR/PII/ports/crypto scan. ~$0.03 USDC per cycle.
- [Web Intelligence Toolkit](https://klymax402.com/bundles/web-intelligence): 6 APIs to scrape, convert, classify, detect language and sentiment. ~$0.035 USDC per cycle.
- [Crypto News & Sentiment Toolkit](https://klymax402.com/bundles/crypto-news-sentiment): 6 APIs for Twitter sentiment + news + prediction markets + trust scores. ~$0.055 USDC per cycle.

## APIs

- [Address Validator API](https://address-validator.api.klymax402.com): Parse, validate and normalize postal addresses. Detect country, verify format. x402.
- [AI Text Summarizer API](https://ai-summarizer.api.klymax402.com): Summarize text or URLs into key points with compression ratio and reading time. x402 USDC.
- [Airdrop Checker API](https://airdrop-checker.api.klymax402.com): Check wallet eligibility for active crypto airdrops — LayerZero, EigenLayer, Scroll. x402.
- [Barcode Generator API](https://barcode-generator.api.klymax402.com): Generate barcodes — EAN-13, UPC-A, Code128, Code39. Returns SVG. x402 micropayment.
- [Base DeFi Yield Optimizer API](https://base-defi.api.klymax402.com): Base chain DeFi yields — Aerodrome, Moonwell, APY, TVL, risk scores. x402.
- [Base64 Codec API](https://base64-codec.api.klymax402.com): Encode/decode base64 and URL-safe base64. x402 micropayment.
- [Cross-Chain Bridge Route API](https://bridge-routes.api.klymax402.com): Best cross-chain bridge routes with fees, time, providers. LI.FI-powered. x402.
- [Code Sandbox API](https://code-sandbox.api.klymax402.com): Execute Python, JavaScript, SQL code in a sandbox. x402 micropayment.
- [Color Palette Generator API](https://color-palette.api.klymax402.com): Generate harmonious color palettes — complementary, analogous, triadic. x402 micropayment.
- [Company Enrichment API](https://company-enrichment.api.klymax402.com): Company firmographics from domain: name, socials, tech stack, emails, phone, address
- [Cron Parser API](https://cron-parser.api.klymax402.com): Parse, validate and explain cron expressions. Get next run times. x402 micropayment.
- [Crontab Generator API](https://crontab-generator.api.klymax402.com): Natural language to cron expression converter. x402 micropayment.
- [Crypto News Feed API](https://crypto-news.api.klymax402.com): Real-time crypto news with sentiment scores, token mentions. CoinGecko + CryptoPanic. x402.
- [CSV to JSON API](https://csv-to-json.api.klymax402.com): Parse CSV to JSON array. Auto-detect delimiter, headers. x402 micropayment.
- [Currency Converter API](https://currency-converter.api.klymax402.com): Fiat and crypto currency conversion — ECB + CoinGecko rates. x402 micropayment.
- [DeFi Yield Finder API](https://defi-yields.api.klymax402.com): Best DeFi yields by token — APY, TVL, risk, protocol. DeFiLlama-powered. x402.
- [DEX Swap Quotes API](https://dex-quotes.api.klymax402.com): Best swap quotes across DEXes (Uniswap, SushiSwap, Aerodrome). Base & Ethereum. x402.
- [Diff Checker API](https://diff-checker.api.klymax402.com): Compare two texts line-by-line — additions, deletions, unchanged. x402 micropayment.
- [DNS Lookup API](https://dns-lookup.api.klymax402.com): DNS record lookup — A, AAAA, MX, TXT, CNAME, NS via Cloudflare. x402 micropayment.
- [Domain Intelligence API](https://domain-intelligence.api.klymax402.com): WHOIS, DNS records, SSL certificate data for any domain in one call. x402.
- [Email Deliverability Audit API](https://email-deliverability.api.klymax402.com): Audit email domain deliverability: SPF, DKIM, DMARC, MX. Score 0-100. x402.
- [Email Finder API](https://email-finder.api.klymax402.com): Find email addresses from name and company domain. x402 paid.
- [Email Send API](https://email-send.api.klymax402.com): Send emails programmatically via Resend. Text and HTML. x402 micropayment.
- [Email Verification API](https://email-verification.api.klymax402.com): Verify emails: syntax, MX records, disposable detection, quality score 0-100. x402 USDC.
- [ENS Resolver API](https://ens-resolver.api.klymax402.com): Resolve ENS names to Ethereum addresses and reverse. x402 micropayment.
- [Event Resolver API](https://event-resolver.api.klymax402.com): Resolve prediction market events. Price checks, claim verification, outcome confidence.
- [Fact Checker API](https://fact-checker.api.klymax402.com): Verify claims with web evidence. Returns sources and verdict. x402 micropayment.
- [Funding Rate Arbitrage Scanner API](https://funding-arb.api.klymax402.com): Cross-venue perp funding rate arb — Hyperliquid, Binance, Bybit, OKX spreads. x402.
- [Perpetual Funding Rates API](https://funding-rates.api.klymax402.com): Perp funding rates across Binance, Bybit, OKX — open interest, sentiment. x402.
- [Gas Estimator API](https://gas-estimator.api.klymax402.com): Multi-chain gas estimation — ETH, Base, Polygon, Arbitrum, BSC. x402 micropayment.
- [Gas Oracle API](https://gas-oracle.api.klymax402.com): Real-time gas prices, gwei tiers, USD cost estimates for Base and Ethereum. x402.
- [GDPR Scanner API](https://gdpr-scanner.api.klymax402.com): Scan website GDPR compliance: consent, privacy policy, trackers. Score 0-100. x402.
- [Hash Generator API](https://hash-generator.api.klymax402.com): Cryptographic hashing — MD5, SHA1, SHA256, SHA512, bcrypt. x402 micropayment.
- [Hyperliquid Funding Rates API](https://hl-funding.api.klymax402.com): HL perp funding rates for 229 markets. Sort, history, arb opportunities. x402.
- [HL Portfolio API](https://hl-portfolio.api.klymax402.com): Hyperliquid account analysis: positions, PnL, fills, orders, funding. x402 pay-per-call.
- [Hyperliquid Spot API](https://hl-spot.api.klymax402.com): Hyperliquid spot tokens, prices, volume, wallet balances. 454 tokens. x402 micropayment.
- [Hyperliquid Vaults API](https://hl-vaults.api.klymax402.com): Hyperliquid vault summaries — APR, TVL, PnL, followers, sorted by performance. x402.
- [HTML to Markdown API](https://html-to-markdown.api.klymax402.com): Convert HTML to clean markdown. Strips scripts and styles. x402 micropayment.
- [HTTP Headers Analyzer API](https://http-headers.api.klymax402.com): HTTP header analysis — security headers, cache, server detection. x402 micropayment.
- [Hyperliquid Perp Market Data API](https://hyperliquid-data.api.klymax402.com): Hyperliquid perp order book, prices, funding, OI, candles. x402 paid.
- [Hyperliquid Whale Position Tracker API](https://hyperliquid-whales.api.klymax402.com): Top Hyperliquid trader positions — long/short, size, PnL, leverage, sentiment. x402.
- [Image Resize API](https://image-resize.api.klymax402.com): Resize images from URL — PNG, JPEG, WebP output. x402 micropayment.
- [IP Geolocation API](https://ip-geolocation.api.klymax402.com): IP geolocation with city, ISP, ASN, VPN/proxy/tor detection. x402.
- [JSON Validator API](https://json-validator.api.klymax402.com): JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.
- [Jupiter Solana Swap Quote API](https://jupiter-quotes.api.klymax402.com): Solana swap quotes via Jupiter — best route, price impact, priority fees, USD pricing. x402.
- [JWT Decoder API](https://jwt-decoder.api.klymax402.com): Decode JWT tokens — inspect header, payload, claims, expiry. x402 micropayment.
- [Keyword Research API](https://keyword-research.api.klymax402.com): SEO keyword research with Google Suggest, intent scoring, long-tail discovery. x402.
- [Language Detector API](https://language-detector.api.klymax402.com): Detect language from text via trigram analysis. 30+ languages, script detection. x402.
- [DeFi Liquidation Oracle API](https://liquidation-oracle.api.klymax402.com): Real-time DeFi liquidation risk levels by protocol and asset. DeFiLlama-powered. x402.
- [Lorem Ipsum Generator API](https://lorem-ipsum.api.klymax402.com): Generate placeholder text — paragraphs, sentences, words. x402 micropayment.
- [Markdown Renderer API](https://markdown-renderer.api.klymax402.com): Render markdown to styled HTML with light/dark/github themes. x402 micropayment.
- [Markdown to HTML API](https://markdown-to-html.api.klymax402.com): Convert markdown to clean HTML with headings, lists, code blocks. x402 micropayment.
- [NFT Floor Price & Rarity API](https://nft-floor.api.klymax402.com): NFT collection floor price, volume, holders, rarity rank via Reservoir. ETH + Base. x402.
- [NFT Metadata API](https://nft-metadata.api.klymax402.com): Fetch NFT metadata — name, image, traits from contract+tokenId. x402 micropayment.
- [OCR Text Extraction API](https://ocr-extract.api.klymax402.com): Extract text from images using OCR. Tesseract-powered. x402 micropayment.
- [Order Book Depth API](https://orderbook-depth.api.klymax402.com): Uniswap V3 pool liquidity depth analysis — price impact at 1/2/5/10% levels. x402.
- [Password Strength Analyzer API](https://password-strength.api.klymax402.com): Password strength scoring with entropy, crack time estimation, common password detection. x402.
- [PDF Generator API](https://pdf-generator.api.klymax402.com): Generate PDF from HTML or Markdown with custom pages, margins, layout. x402.
- [Person Enrichment API](https://person-enrichment.api.klymax402.com): Person lookup from email: name, title, company, social profiles. x402.
- [Phone Number Validation API](https://phone-validation.api.klymax402.com): Validate phone numbers worldwide: carrier, line type, country, E.164. x402.
- [PII Detector API](https://pii-detector.api.klymax402.com): Detect PII in text: emails, phones, SSNs, credit cards, IPs. Regex + Luhn. x402.
- [Port Scanner API](https://port-scanner.api.klymax402.com): TCP port scanning — check open ports on any host. x402 micropayment.
- [Prediction Markets API](https://prediction-markets.api.klymax402.com): Prediction market odds from Polymarket. Active markets, probabilities, volume. x402.
- [QR Code Generator API](https://qr-code.api.klymax402.com): Generate QR codes from text or URLs. Returns base64 PNG. x402 micropayment.
- [Regex Tester API](https://regex-generator.api.klymax402.com): Test, validate and explain regular expressions with match highlighting. x402 micropayment.
- [Research Report API](https://research-report.api.klymax402.com): Multi-source research report generator with web fetching. x402 micropayment.
- [Screenshot & PDF Capture API](https://screenshot-pdf.api.klymax402.com): Capture screenshots (PNG/JPEG/WebP) and generate PDFs from any URL. x402 payments.
- [Sentiment Analyzer API](https://sentiment-analyzer.api.klymax402.com): Analyze text sentiment, emotions, confidence scores, and key phrases. x402 USDC.
- [SEO Page Analyzer](https://seo-analyzer.api.klymax402.com): SEO audit any URL: meta tags, headings, links, images, Schema.org, score 0-100. x402.
- [Slug Generator API](https://slug-generator.api.klymax402.com): URL-friendly slugs from text — transliteration, custom separators. x402 micropayment.
- [SMS Validator API](https://sms-validator.api.klymax402.com): Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.
- [Social Profile Enrichment API](https://social-profile.api.klymax402.com): Social media profile lookup for GitHub, Twitter/X, LinkedIn, YouTube. x402.
- [Solana Priority Fee Estimator API](https://solana-fees.api.klymax402.com): Solana priority fees at 6 levels, cost in SOL/USD, congestion. x402.
- [Solana Token Launch Scanner API](https://solana-launches.api.klymax402.com): New Solana token launches — pump.fun, Raydium, PumpSwap. Price, liquidity, volume. x402.
- [Solana Pool Liquidity Scanner API](https://solana-pools.api.klymax402.com): Solana DEX pool liquidity depth — TVL, slippage, volume, Raydium/Orca/Meteora. x402.
- [SSL Checker API](https://ssl-checker.api.klymax402.com): SSL certificate check — validity, expiry, issuer, chain, grade. x402 micropayment.
- [Stock Price API](https://stock-price.api.klymax402.com): Real-time stock quotes — price, change, volume, market cap. x402 micropayment.
- [Technology Stack Detection API](https://tech-enrichment.api.klymax402.com): Detect 50+ technologies on any website: CMS, frameworks, analytics, CDN. x402.
- [Text Classifier API](https://text-classifier.api.klymax402.com): Classify text into categories with confidence, readability, content type. x402.
- [Text to Speech API](https://text-to-speech.api.klymax402.com): Convert text to MP3 speech audio in 50+ languages. x402 micropayment.
- [Text Translator API](https://text-translator.api.klymax402.com): Translate text between 50+ languages with auto-detection. x402 micropayment.
- [Timezone Converter API](https://timezone-converter.api.klymax402.com): Convert datetime between timezones. List all IANA zones. x402 micropayment.
- [Token Holders API](https://token-holders.api.klymax402.com): Token holder distribution — top holders, whale count, concentration score. x402.
- [Token OHLCV History API](https://token-ohlcv.api.klymax402.com): Historical OHLCV candles for any token. CoinGecko + GeckoTerminal on-chain. x402.
- [Token Price API](https://token-price.api.klymax402.com): Real-time crypto token prices — price, 24h change, market cap, volume. x402 micropayment.
- [Token Safety & Contract Risk API](https://token-safety.api.klymax402.com): Token safety check — honeypot, tax, proxy, blacklist, risk score. GoPlus-powered. x402.
- [Trust Score API](https://trust-score.api.klymax402.com): Trust scoring for domains, wallets, APIs. SSL+DNS+WHOIS+headers. Score 0-100.
- [Twitter Scraper API](https://twitter-scraper.api.klymax402.com): Scrape Twitter/X profiles, tweets, search. No API key. Structured JSON. x402 pay-per-call.
- [Unit Converter API](https://unit-converter.api.klymax402.com): Unit conversion — length, weight, temperature, volume, speed, data. x402 micropayment.
- [URL Shortener API](https://url-shortener.api.klymax402.com): Shorten URLs with hash-based codes or custom aliases. x402 micropayment.
- [User Agent Parser API](https://user-agent-parser.api.klymax402.com): Parse user agents — browser, OS, device, bot detection. x402 micropayment.
- [UUID Generator API](https://uuid-generator.api.klymax402.com): Generate UUIDs v4, v7, ULID, nanoid. Batch support. x402 micropayment.
- [Vector Search API](https://vector-search.api.klymax402.com): In-memory vector search with TF-IDF and cosine similarity. x402 micropayment.
- [Wallet Portfolio Tracker API](https://wallet-portfolio.api.klymax402.com): Crypto wallet balances, ERC-20 tokens, USD values across Base and Ethereum. x402.
- [Weather API](https://weather-api.api.klymax402.com): Current weather and 7-day forecast for any location. OpenMeteo-powered. x402 micropayment.
- [Web Scraper to Markdown API](https://web-scraper.api.klymax402.com): Extract clean markdown from any URL. Removes boilerplate. For RAG pipelines. x402.
- [Web Search API](https://web-search.api.klymax402.com): Web search returning structured results — titles, URLs, snippets. x402 micropayment.
- [Webhook Tester API](https://webhook-tester.api.klymax402.com): Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment.
- [Whale Alert API](https://whale-alert.api.klymax402.com): Track large on-chain whale transactions on Ethereum and Base. x402 micropayment.
- [Word Counter API](https://word-counter.api.klymax402.com): Count words, characters, sentences, paragraphs, reading time. x402 micropayment.

## Discovery
- MCP Registry: https://registry.modelcontextprotocol.io/v0/servers?search=Br0ski777
- Smithery: https://smithery.ai/profile/axel-belfort
- Bazaar (CDP): https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources
- GitHub source: https://github.com/Br0ski777

## Payment
Payment via x402 protocol — USDC on Base L2 (eip155:8453).
Wallet receiver: 0x6E8B64638b24C6D625b045dD353120d850064E2E
Total APIs: 100