"Calibre-Web" matching MCP connectors:

Evidence-backed x402 web verification for AI agents, with auditable decisions for every condition.

MUJ428 verifies intent and evidence before consequential AI-agent actions.

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

Payment-rail-independent intent-to-effect integrity for consequential agent actions.

8 pay-per-call web intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).

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

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.

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.

Signed attestations for agents, $0.01/call via x402: URL witness, AI permission, tx finality, JWKS.

Live MCP endpoint delivering web scraping, PDF extraction, and Base analytics via x402 USDC micropayments.