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 - [Gotobi Calendar API](https://gotobi.hugen.tokyo) - Japanese FX gotobi date intelligence for AI trading agents. Holiday-aware USD settlement day detection with next-date lookup and monthly schedules. $0.001 USDC per call on Base. [Source](https://github.com/bartonguestier1725-collab/x402-gotobi-api)
 - [Weather API](https://weather.hugen.tokyo) - Global weather data for AI agents. Real-time conditions and 7-day forecasts for any city worldwide. $0.001 USDC per call on Base. [Source](https://github.com/bartonguestier1725-collab/x402-weather-api)
 - [Scout MCP](https://scout.hugen.tokyo) - Multi-source intelligence API for AI agents. Search across Hacker News, GitHub, npm, PyPI, Product Hunt, X/Twitter, and x402 Bazaar in one call. 10 endpoints from $0.001 USDC on Base. [Source](https://github.com/bartonguestier1725-collab/scout-mcp)
+- [Carbon & Cashmere](https://www.carbon-cashmere.de) — Crypto trading intelligence API with **166 operational x402 endpoints** (+ 11 sponsor tier) across **7 networks** (Base, Polygon, Arbitrum, World Chain, Solana, Algorand, Stellar). Powered by own blockchain nodes (Bitcoin Core pruned, Kaspa Rusty, Bittensor Subtensor, Ethereum Nimbus beacon) + proprietary ML ensemble (XGBoost + LightGBM + LSTM + ARF + Meta-learner). Coverage: signals/decisions, BTC/Kaspa/Subtensor derivatives, macro/funding/liquidations, RWA Trust Score, Tokenized-Equity Cross-Issuer Index. $0.005 commodity → $0.25 premium signals. x402 v2 with Bazaar enrichment, offer-receipt EIP-712, gas-sponsoring. MCP server `@carbon-cashmere/x402-mcp` on Anthropic Registry + Smithery + Glama + npm. ([Manifest](https://api.carbon-cashmere.de/.well-known/x402)) | ([Sponsor manifest](https://api.carbon-cashmere.de/.well-known/x402-sponsor)) | ([Docs](https://api.carbon-cashmere.de/docs)) | ([npm](https://www.npmjs.com/package/@carbon-cashmere/x402-mcp))
 - [Mailcheck API](https://mailcheck.hugen.tokyo) - Email validation for AI agents. Syntax, MX records, disposable domain detection, free provider check, role-based address detection, and typo suggestion. $0.001 USDC per call on Base. [Source](https://github.com/bartonguestier1725-collab/x402-mailcheck-api)
 - [MoonMaker API](https://api.moonmaker.cc) - AI-native crypto data API with x402 pay-per-call. 11 endpoints: signals, market context, DeFi regime, institutions, ETF flows, DeFi yields, DEX alpha. $0.02–$0.10/call USDC on Base. No signup. [llms.txt](https://api.moonmaker.cc/llms.txt)
 - [x402 AI API — zeroreader](https://api.zeroreader.com) - 29 Cloudflare Workers AI models (LLM, Embeddings, Image Generation, Audio, Translation) via x402 micropayments. $0.001–$0.015 per request, USDC on Base. Supports streaming, batch processing, OpenAI-compatible format. [llms.txt](https://api.zeroreader.com/llms.txt) | [OpenAPI](https://api.zeroreader.com/openapi.json)