"Accessing the OpenAI API" matching MCP servers:

MCP Server for the LINE Shopping API, enabling AI agents and tools to interact with LINE Shopping data and operations via the Model Context Protocol.

A comprehensive Model Context Protocol (MCP) server that provides complete access to the Recharge Storefront API endpoints. Enables AI assistants to manage subscriptions, customers, orders, and billing through a standardized interface.

Pay-per-call USDC payment proxy for AI agents. Issue scoped Pay Tokens with hard spending caps and auto-journal every charge to freee / Money Forward / QuickBooks.

A template for building MCP servers with a built-in paywall gate that offers free local execution and premium server-side execution via Stripe and x402 payment lanes.

Provides currency conversion using the Wise API, supporting real-time and historical rates with caching and cross-rate calculation.

MCP server for creating and fiscalizing invoices via solo.com.hr API. Enables AI agents to generate invoices, retrieve invoice details, list invoices, and check next invoice number.

Create invoices from any MCP client via the Invovate API — compute totals and generate PDF, JSON, or UBL invoices in 11 languages. Exposes four tools: calculate_invoice_totals (no API key needed), generate_invoice_pdf, generate_invoice_ubl, and get_invoice_capabilities.

MCP server for the Monei API that gives AI agents access to wallets, transfers, crypto sends, swaps, offramp, and bill payments through natural language.

MCP server wrapping the Chargebee REST API to manage customers, subscriptions, invoices, and transactions.

Bridges AP2 and x402 payment mandates into ISO 20022 pain.001/pacs.008 records with spending-cap, expiry and authorisation guardrails, via an MCP server.

Enables interaction with the Yugo Payments API to manage payins, payouts, and accounts through auto-generated MCP tools.

Enables interaction with the Centrapay payments API for testing NZ payment flows, including creating, managing, and settling payment requests through natural language.

Enables AI agents to create hosted checkouts, charge mobile wallets, query transactions, and process refunds via the JazzCash payment API.

A read-only MCP server for securely accessing Xendit payment platform data. It enables querying balances, invoices, transactions, disbursements, refunds, and virtual account payments while preventing any money-moving operations.

Enables AI agents to manage financial operations including balance checks, money transfers, invoicing, spending policies, and audit logs through the PayGent API.

Unofficial MCP server for the Privat24 Business API that provides tools for account statements, balances, transactions, payment creation, and exchange-rate lookups.

MCP server to connect AI assistants to the AdvinPay payment API, enabling PIX charges, transaction queries, and documentation search.

Enables AI agents to interact with the Griffin API for banking operations like opening accounts, creating payments, and managing legal persons.

Enables AI agents to autonomously pay for and discover services using HPP USDC.e over the x402 protocol, without API keys or manual signing.

Pay for any x402-gated content or API with USDC micropayments on Base. Discover payment gates, execute payments, and view transaction history.