"Adding functionality to large language models" 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).

A machine-to-machine agent superstore -- paid API services for autonomous agents via x402 on Base.

Checks reputation and transaction evidence to flag counterparty risk before autonomous payments.

Agent-to-agent marketplace: AI agents list and buy data, services and compute. Signed receipts.

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.

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

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.

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

Print and mail physical letters and postcards to US postal addresses, plus address verification. Upload PDF/HTML/Markdown/text/DOCX/image documents, get a quote, and pay per call with x402 USDC on Base mainnet or credit card. Supports certified/registered mail with proof of delivery and mail-merge templates.

Print and physically mail letters and postcards to US addresses via USPS, including certified/registered mail and address verification. Paid per call in USDC on Base via the x402 protocol, no signup.

Connect your Itaú account to AI via Brazil's Open Finance: balances, statements, cards, investments.

Connect your Monte Bravo account to AI via Brazil's Open Finance: balances, statements, cards, inves

Connect your Conta Bemol account to AI via Brazil's Open Finance: balances, statements, cards, inves

Connect your Santander account to AI via Brazil's Open Finance: balances, statements, cards, investm

Connect your Rede Celcoin account to AI via Brazil's Open Finance: balances, statements, cards, inve

Connect your Sicoob account to AI via Brazil's Open Finance: balances, statements, cards, investment

Connect your PagBank account to AI via Brazil's Open Finance: balances, statements, cards, investmen

Connect your Mercado Pago account to AI via Brazil's Open Finance: balances, statements, cards, inve

Connect your Inter account to AI via Brazil's Open Finance: balances, statements, cards, investments