"A server for testing APIs" matching MCP servers:

A Model Context Protocol (MCP) server that provides testing and debugging tools for Stripe integrations, including test clock management, customer and product management, and subscription testing.

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.

An MCP server that exposes Alipay AI Pay capabilities to AI agents, enabling skill discovery, payment integration guides, and merchant onboarding workflows via Alipay's payment APIs.

Marketplace MCP for paid HTTP APIs. Pay per call in USDC on Base via the open x402 standard — non-custodial. 13 tools for discovery, buying, and publishing APIs.

Enables AI assistants to parse, validate, send, and inspect X12 EDI documents via the SignalEDI Core API, with optional QuickBooks integration and a demo mode for keyless local testing.

Enables AI assistants to interact with the full range of Paystack APIs, allowing operations like transaction management, customer creation, and payments through natural language.

A local MCP server for Stripe payment operations with 52 tools across 8 domains, featuring built-in PII redaction and strict input validation for safe AI-assisted development workflows.

Enables sending letters and MICR-encoded checks, managing contacts and templates, and verifying US/Canadian addresses via the PostGrid Print & Mail and Address Verification APIs from Claude.

An MCP server that enables AI assistants to interact with Interswitch APIs for payments, transfers, VAS, cardless paycodes, Transaction Search, Card 360, lending, payouts, agency banking, and fintech card-processing utilities.

MCP server for integrating HiPay's Enterprise payment API, providing tools for transaction management, payment processing, and hosted payment pages.

Enables AI agents to discover, pay for, and retrieve receipts for external APIs via USDC micropayments through the SynapseNetwork Gateway, supporting stdio and Remote MCP.

Enables full CRUD operations on 29 QuickBooks Online entity types and 11 financial reports via natural language, allowing users to manage customers, invoices, payments, and more through MCP-compatible clients.

A Model Context Protocol server that exposes the flexprice API as tools for AI assistants, enabling management of customers, plans, prices, subscriptions, invoices, payments, and events from IDEs or CLI.

MCP server that allows AI agents to discover and pay for thousands of APIs (x402 on Solana/Base) using a single key, with automatic payment handling and a federated catalog of machine-payable endpoints.

Enables AI agents to discover, pay for, and sell APIs using crypto on Solana and Base networks, with support for automated x402 payments.

An MCP server that exposes tools for Taiwan's ezPay e-invoice lifecycle, enabling AI assistants to issue, void, and query invoices and allowances through the standard MCP 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.

MCP server for Mercury Banking API that enables listing accounts and retrieving transactions via natural language.

MCP server for interacting with NexBank API v2, providing six business tools and supporting Bearer Token or OAuth authentication.

MCP server for Online Boutique AI Assistant that exposes 18 e-commerce microservice functions via the Model Context Protocol, enabling any MCP client to manage products, carts, checkout, payments, and shipping.