"Using Claude to Check the Current Weather Without an API Key" matching MCP servers:

Provides current weather conditions and 7-day forecasts for any location worldwide, covering temperature, humidity, wind, and precipitation, with pay-per-call micropayments via x402.

An MCP server that wraps the Check Payroll API, providing 263 tools for managing companies, employees, contractors, payrolls, tax configuration, and more.

Minimal MCP server exposing today's weather for a city via tool, resource, and prompt, with optional paywall protection via Nevermined Payments.

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.

An MCP server for Nexi POS payment operations, enabling creation of purchases and refunds, polling payment states, confirming transactions, and recovering unconfirmed transactions.

Connects Claude to the customer side of Housecall Pro, letting you view estimates and invoices, check company details, and decline estimate options using the link your contractor sent.

Enables local MCP clients to query the dxpert.ai API using an API key. Users can ask advisory questions, run agents and diagnostics, convert CSV exports to bundles, and manage purchases.

Enables AI agents to issue, query, and cancel Serbia SEF eFaktura electronic invoices (UBL 2.1 SRB-CIUS) into the national Ministry of Finance system, using the merchant's own API key.

Connects AI assistants to Quaderno's tax compliance engine, enabling tax calculation, tax ID validation, and invoice creation via natural language.

Enables AI agents to send free and paid faxes to US and Canada numbers, check fax status, and purchase prepaid credits, all without leaving the chat.

A reference MCP server demonstrating Bitcoin Lightning micropayments for weather data via the Tollbooth DPYC SDK, wrapping Open-Meteo and providing paid tools for current, forecast, and historical weather.

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.

x402-trust gives AI agents a "check before you pay" layer for the x402 ecosystem.

MCP server providing Polymarket weather-market bucket-transition signals for AI agents, with free city/signal inspection tools and paid signal bundles via USDC on Base using x402.

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.

Travel eSIMs for 193 countries. Stripe + Bitcoin checkout. QR by email in 30s. No API key.

Enables MCP-capable agents to read Fintaro invoices and transactions, and upload receipts, via a scoped API key with PII-safe projections.