"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.

54+ pay-per-use AI & data tools for agents, payable in USDC via x402 on Solana — no API keys, no subscriptions. AI image, video, music and voice generation (cheaper than official APIs), web search, cited research reports, Claude Opus Q&A, crypto prices, page scraping, domain info and more. Pay only for what you call, straight from the agent wallet. Free directory tool lists all live endpoints.

Pay-per-use web extract, token prices, and wallet balances via x402 USDC micropayments.

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.

63 pay-per-call tools for agents: vision, text, data, web, blockchain. USDC on Base via x402.

Bounded data, document, web-quality, and operations services purchased with USDC through x402.

Pay-per-call web & EU business intelligence for AI agents (x402 USDC on Base). 11 tools.

Pay-per-call AI tools over x402: web research, summarization, structured extraction (USDC, Base).

x402 MCP web parser: URLs to Markdown for agents. USDC on Base, Polygon, Arbitrum, Ethereum.

30 pay-per-call APIs for AI agents: compliance, trade, safety, web, data. USDC on Base via x402.

64 x402 tools: cheap LLM $0.002, web+news search, French residential-IP scraping, FR/UK/US data.

Pay-per-call data tools for AI agents: crypto signal, web reader, SEO audit. x402 USDC on Base.

x402-paid tools: text to 3D-printable STL, web search, and search+read. USDC on Base.

247 LLMs + image/video/voice/music gen + crypto/DeFi/markets/web-search. Pay-per-call USDC, no key.

Lets AI agents autonomously pay for and call L402-protected APIs in Bitcoin Lightning. 12 tools across two layers: l402_fetch / l402_balance / l402_set_budget / l402_spending_report (generic L402 client) + 11 VERITY paid services (BTC price, web search, scrape, AI summarize/sentiment/translate, world state, domain intel, deep research, strategic alpha, integration). Sub-second settlement, no API keys, no chargebacks.

Live financial data MCP: FX, crypto, stocks, news, URL reader. x402 on Base: $0.001/call.

AI agent gateway with web fetching, data extraction, crypto pricing, and x402 payments

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.