"Resources and Techniques for Testing in React" 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.

Credit and payments for AI agent developers — over MCP. No crypto required

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.

Provides a three-layer payment firewall for AI agents, enabling identity verification, risk screening, and execution authorization with on-chain policy enforcement for secure and auditable transactions.

Free x402 endpoint checker plus paid report and metadata tools. Remote MCP server for agents. Written by AI named Nock, not a human.

MCP server exposing a fictional payment domain as tools, resources, and prompts, enabling reasoning over transactions, payment hubs, services, and system health.

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

Enables AI assistants to manage restaurant operations by integrating with Toast POS, including orders, menus, employees, payments, inventory, and reporting through 50+ tools and 18 React apps.

An MCP server that provides a standardized interface for AI assistants to interact with TropiPay's payment platform, enabling account management, transactions, beneficiary management, and payment link creation through tools and resources.

A production-ready MCP server with 24 tools for Stripe, Twilio, Resend, GitHub, and Slack, plus pre-built workflow prompts and live resources.

Enables API documentation lookup and live API tools for managing Upmind platform resources like brands, products, clients, invoices, and tickets through natural language.

Enables interaction with Safaricom M-Pesa Daraja 3.0 API, covering payments, disbursements, treasury, and fraud checks, with a built-in simulator for testing without credentials.

Single-tenant MCP server for Polish KSeF e-invoice workflows, supporting local stdio testing, draft management, and invoice submission with safety gates.

Enables AI agents to manage MONA Cloud resources such as VPS and databases, use a shared VND wallet, integrate MONA Pay payments, and send transactional email via MONA Mail, all through natural language in MCP-compatible clients.

Official hosted MCP server for Whop, enabling AI clients to manage Whop businesses and resources via OAuth with prepare-and-confirm safeguards.

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 creating non-custodial payment drafts and pay links for BTC, USDC, USDT, and EURC, with signing and broadcast remaining in the user's wallet.

A one-command paywall for local servers that enables testing AI agents' payment flows by simulating HTTP 402 Payment Required responses. It proxies requests with valid payment headers to the actual server, making it easy to develop and test x402 client logic without real blockchain transactions.

Enables AI agents to pay for protected HTTP resources using Stellar USDC via the x402 protocol, facilitating automated payments and access to paid APIs.

An MCP server for Splitwise that lets you manage expenses, balances, settlements, groups, and comments in natural language from any MCP client.