The catalog is broad rather than deep — Hyperliquid market data, B2B enrichment, security scans, scraping, NLP and a code sandbox in the same place — and the payment model is the point: no account with any of the providers, a signed USDC micro-payment per request instead. What you accept in return is that a private key does the signing, which is why the project tells you to fund a separate wallet, and that every tool's price is fixed and visible up front.
A catalog of API tools behind x402 micropayments. A call comes back as HTTP 402 Payment Required, the client signs a USDC payment on Base, the request retries and the data arrives. No signup, no key, no subscription — an agent needs a funded wallet. It is reachable as a Streamable HTTP endpoint at https://klymax402.com/mcp, and as an npm package with LangChain and Vercel AI SDK bindings.
- Hyperliquid coverage: hyperliquid_data for perp markets with open interest and orderbook depth, hyperliquid_whales for large positions with PnL, entry price and leverage, hl_funding with an arbitrage scanner, plus hl_vaults, hl_portfolio and hl_spot
- prediction_markets pulls active events from Polymarket and Kalshi with probabilities and volume, and event_resolver settles an outcome or verifies a claim against it
- Crypto and DeFi: dex_quotes with price impact, defi_yields, token_price, gas_oracle, whale_alert, token_holders, token_ohlcv, bridge_routes across chains through LI.FI, airdrop_checker, and Solana-specific launches, Jupiter quotes, priority fees and pool liquidity
- Security and trust: trust_score scores a domain, wallet or API from 0 to 100; token_safety checks honeypot, liquidity and ownership; domain_intelligence returns DNS, WHOIS, SSL and registrar, alongside ssl_checker, http_headers, port_scanner and jwt_decoder
- B2B enrichment: company_enrichment and person_enrichment, email_finder from a name and domain, email_verification, tech_enrichment detecting technologies on a site, social_profile, and email_deliverability auditing SPF, DKIM and DMARC
- Web work: web_search, web_scraper turning a URL into clean Markdown with headless rendering, screenshot_pdf, seo_analyzer, keyword_research and twitter_scraper
- Text and NLP: ai_summarizer, sentiment_analyzer, text_translator across 50+ languages, text_classifier, language_detector, ocr_extract and text_to_speech, plus diff, regex, Markdown and HTML conversion utilities
- Research and compliance: fact_checker with evidence and sources, research_report across multiple sources, gdpr_scanner, pii_detector, and code_sandbox for running Python, JavaScript or SQL
- Every tool publishes its own per-call price, from $0.001 for a funding-rate scan to $0.06 for a full SEO audit or a research report
A wallet holding USDC on Base L2 and the private key that signs the payments — the project recommends a dedicated agent wallet rather than your main one. There are no API keys and no subscription; each call is charged at its listed price when the server answers 402. Reach it as a Streamable HTTP endpoint at https://klymax402.com/mcp, or from Node.js 18 or newer through the x402-agent-tools package alongside @x402/fetch, @x402/evm and viem, which exposes the same catalog as LangChain and Vercel AI SDK tool objects.
One command — npm install x402-agent-tools @x402/fetch @x402/evm viem