"Calibre-Web" matching MCP connectors:

x402 MCP get-paid path: USDC, spend caps, AUP, $49 kit. CAPTCHA/web-unlock for payment-ready agents.

Browse, verify and buy Twelve Permissions NFTs on XRP Ledger. Every claim is checkable.

Verify live jobs/RFPs, deadlines, eligibility, terms changes, and Base/web data via x402.

Buy timestamped web, company, commerce, social, document and decision data via x402.

Check a Base contract, transaction or web page before you act. Free pricing, paid per call in USDC.

x402 paid APIs for AI agents on Base. Blockchain, wallet, DEX, crypto, web search.

OpenSpender

OpenSpender gives your agent an allowance, not your API keys: one self-custodial USDC wallet that pays per request for web search, frontier models (Claude, GPT, Gemini, Grok), image and video generation, and a growing catalog of x402/MPP machine-payable APIs — every call priced before it's paid and capped by budgets you set.

Formo

Formo makes analytics and attribution easy for crypto apps, so you can focus on growth. Measure what matters and drive growth onchain with the data platform for onchain apps. Get the best of web, product, and onchain analytics on one versatile platform.

Production MCP Suite of 10 Autonomous Security, KYA, Web Extraction & Intelligence Tools with x402 Micropayment Settlement on Base and Solana. Get Top 10 most common in-demand services at lowest prices: audit_smart_contract, check_kya_risk, generate_code_patch, extract_web_markdown, check_token_honeypot, stream_intent_feed, scan_yield_spread, simulate_dao_proposal, analyze_social_momentum, optimize_gas_routing

web3d-mcp is an MCP server for AI-powered 3D scene and ad generation on the web. It provides tools to generate, edit, animate, preview, validate, and export 3D scenes built with React Three Fiber (R3F). Designed for web developers and creative teams, it enables programmatic creation of production-ready interactive 3D web experiences and advertisements through natural language.

Open API Marketplace for AI Agents. Crypto data tools with USDC payments on Base.

Crypto prices, Polymarket CLOB, AI research & web rendering. x402 Solana payments.

Production-grade MCP gateway delivering 8 real-time AI tools with instant x402 micropayments settled in USDC on Base Mainnet or SPL-USDC on Solana. Features Basescan contract auditing, wallet analytics, headless browser scraping, and pre-scraped oracle data feeds.