"A database for searching medical and scientific research articles" matching MCP servers:

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

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

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.

MCP server providing access to the easybill REST API for managing invoices, customers, articles, payments, projects, and time tracking, with read-only mode by default.

Enables Claude to interact with a Folio business bank account for managing accounts, transactions, receipts, bookkeeping, and payments as drafts.

MCP server for interacting with Aruba Fatturazione Elettronica API, enabling users to manage electronic invoices with Claude, including sending invoices to SDI, searching, downloading, and retrieving invoice details and notifications.

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.

An MCP server for KG Financial's payment services integration, enabling AI coding tools to generate accurate code by automatically searching payment integration documentation through natural language queries.

MCP server for Alog, an AI × Human blog platform. Enables AI agents to post logs, create and publish articles, search content, and interact socially on alog.world.

An MCP server for Grubhub that enables searching restaurants, browsing menus, building carts, checking out, and placing orders, with additional support for campus dining cards.

MCP server for managing a 2328 merchant account, providing tools for balances, exchange rates, invoices, static wallets, payouts, and conversions via natural language.

Fail-closed live-endpoint x402 router. Pay $0.01 USDC on Base, Solana, or Algorand for a live payable URL or an honest miss.

Connects to the Lexware Office API to provide read and write access to accounting data such as invoices, contacts, vouchers, and articles. Enables natural language queries and management operations through an MCP client.

Enables research queries and billing management through the Limex hosted API.

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 Claude to write to Xero directly for invoices, contacts, payments, and bills via a remote MCP endpoint hosted on Vercel.

Enables searching the Bazaar resource catalog and making spend-capped paid calls to x402 endpoints, integrated with Rail402's Stellar payment facilitator.

A per-call payment trust and reputation API for AI agents, allowing agents to check if a counterparty is safe to pay before making a payment.