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"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP servers:

  • Recharge Storefront API MCP

    bearded-giant
    A
    license
    Not graded
    quality
    D
    maintenance
    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.
    2
    MIT

  • mcp-nexi-pos-api

    Knoseman
    F
    license
    Not graded
    quality
    A
    maintenance
    An MCP server for Nexi POS payment operations, enabling creation of purchases and refunds, polling payment states, confirming transactions, and recovering unconfirmed transactions.
    20

  • Stripe MCP

    ampcome-mcps
    A
    license
    Not graded
    quality
    D
    maintenance
    Enables integration with Stripe APIs through function calling, supporting operations on customers, products, invoices, subscriptions, and more.
    10,572
    MIT

  • Quaderno MCP Server

    AnderRahe
    A
    license
    Not graded
    quality
    D
    maintenance
    Connects AI assistants to Quaderno's tax compliance engine, enabling tax calculation, tax ID validation, and invoice creation via natural language.
    MIT

  • @powforge/captcha-mcp

    zekebuilds-lab
    A
    license
    A
    quality
    B
    maintenance
    MCP server that gates API calls to AI agents using proof-of-work (free) or Lightning payment (3 sats), providing challenge, verify, and status tools for per-call authentication without accounts.
    3
    64
    1
    MIT
  • novapay-mcp by NovaPay

    novapay-mcpofficial

    NovaPay
    A
    license
    A
    quality
    C
    maintenance
    MCP server for NovaPay that enables AI agents to create payment links, poll payment status, manage session lifecycle, and generate merchant keys.
    9
    132
    MIT

  • x402-gateway-mcp

    Marysbrain
    A
    license
    A
    quality
    B
    maintenance
    Enables MCP clients to access all endpoints of an x402 gateway by paying real-time microtransactions (USDC on Base) per API call, with automatic tool discovery and spend guardrails.
    23
    89
    MIT

  • monobank-mcp

    todesstoss
    A
    license
    A
    quality
    A
    maintenance
    A Model Context Protocol server that enables interaction with Monobank API, providing tools for currency exchange rates, client info, and account statements.
    8
    11
    MIT

  • mcp-proofjson

    proofjson
    A
    license
    A
    quality
    A
    maintenance
    A local MCP server that integrates ProofJSON to assess invoices before payment, providing allow/review/block decisions with confidence scores and verification capabilities.
    3
    MIT

  • openfinance-br-mcp

    brunovicco
    A
    license
    A
    quality
    A
    maintenance
    Enables Claude to interact with the Open Finance Brasil APIs, allowing users to query accounts, balances, transactions, credit cards, PIX keys, initiate PIX payments, and view investments across supported Brazilian banks using natural language.
    18
    MIT
  • MAP Maraventano Agent Protocol by maraventano

    MAP Maraventano Agent Protocolofficial

    maraventano
    A
    license
    A
    quality
    B
    maintenance
    MAP (Maraventano Agent Protocol). One MCP server with three subtractive parts — Merchant Key (read any product URL into one CleanRead), Atlas (publish your own catalog by reading yourself), Provisions (wallet curriculum), Teacher, not butler: never signs, pays, or holds keys.
    23
    53
    Inno Setup

  • MCP Midtrans Documentation

    rissets
    A
    license
    A
    quality
    D
    maintenance
    Enables AI agents to integrate Midtrans payments by providing comprehensive documentation, API references, and code examples for 15+ payment methods across 5 languages. Includes tools for generating charge requests, webhook handlers, and searching documentation without requiring API keys.
    9
    1
    MIT

  • giskard-search

    giskard09
    A
    license
    A
    quality
    C
    maintenance
    Pay-per-use semantic web search for AI agents. Powered by SearxNG, agents pay in sats via Lightning Network micropayments — no API keys required.
    5
    1
    Apache 2.0

  • Invoicetronic MCP Server

    fgasparetto
    A
    license
    A
    quality
    D
    maintenance
    MCP server for Italian electronic invoicing via the Invoicetronic API, enabling management of invoices through SDI with 20 tools for sending, receiving, exporting, and more.
    18
    MIT