"How to build your own knowledge base" matching MCP connectors:

Ready for a new way to bill pay? Pay any US bill in a snap, right from your AI assistant. Describe or snap a photo of your bill (electric, water, gas, internet, phone, medical, credit card, rent, parking tickets, traffic violations and more) and Papaya reads it, then hands you a secure link to pay by card. Fast, secure, and no juggling twelve logins, with full or partial payments and status updates. Available in the US only. Powered by Papaya (papayapay.com).

Pay any US bill in a snap, right from your chat — utilities, medical, rent, parking tickets & more.

Pay-per-call QUBO/Ising optimization for AI agents via x402 (USDC on Base). No API keys.

MCP marketplace: agents pay per call in USDC via x402. Plus Base chain data and a USDC<->bank ramp.

AI-native settlement rail + intelligence oracle for autonomous agents. x402, Base mainnet, 81 tools.

PayPal MCP Pack — read-only access to PayPal transactions, orders, invoices, and disputes.

Stripe MCP Pack — read-only access to Stripe data via API key.

AgisHub — pay-per-call tools for AI agents over x402 (USDC on Base). No API key.

Verify your agent's x402 payment flow for free on Base Sepolia testnet before real money moves.

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

Agentic commerce network: discover sellers and products, negotiate, and pay USDC on Base via x402.

Pay-per-query x402 business intelligence on Base, settled in USDC via the native 402 payment flow.

Pay for HTTP APIs and charge for your own: x402 micropayments in USDC on Base.

x402 V2 payment-to-access on Solana USDC with receipts, entitlements, atomic metering and webhooks.

Pre-signature x402 payment-risk oracle. AI agents call forecast_payment before paying a counterparty and get a GO / HOLD / STOP verdict from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions screening — plus a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; returns an x402 payment challenge over that.

Send real faxes to EU institutions: pay per fax via checkout link or prepaid API key.

Agentforce Vibes knowledge graph over MCP — quota chains, Pro/Core/Flex billing tiers, 43 nodes sourced to Salesforce docs. Works in claude.ai in 30 seconds.

Discover Algerian COD stores on Mystoq, or manage your own: products, prices, shipping/fraud tools.

Buy any of 24,000+ live x402 services with USDC on Base — the open marketplace for the agent economy.

Print & mail PDF/HTML/Markdown/text/DOCX/images to US addresses; pay per call in x402 USDC on Base.