"How to obtain an API key" matching MCP servers:

Publishes a spending-summary tool alongside an interactive HTML view, letting people click a category in the answer to fetch the individual expense records behind that total. Keeps calculations and their supporting evidence together in a single inspectable flow.

MCP server that resolves postal/ZIP codes to place names, states, and coordinates using Zippopotam.us. Free, no API key required.

Enables real-time domain registration lookups via RDAP, including availability, expiration, and registrar details, with no API key required. Supports natural language queries like 'is example.com available?' or 'when does example.com expire?'.

Enables currency conversion and exchange rate lookups using real ECB reference rates, free and without an API key. Supports natural language queries like 'convert 100 USD to EUR' or 'what's the exchange rate between GBP and JPY?'.

Publish Markdown or HTML to a shareable link from your AI assistant, then list, inspect, update or delete your pages. Six tools cover publishing, page management and account usage. Connect through hosted Streamable HTTP with OAuth, or use an API key for headless clients.

MCP server for AI Diagram Maker — generate software engineering diagrams from natural language, code, ASCII diagram, images, or Mermaid. Inline diagram rendering using MCP apps UI and diagram URL in responses. Works with Cursor, Claude Desktop, Claude Code, and any MCP-compatible AI.

Provides real-time weather temperature queries for any city with an interactive UI form, using Open-Meteo API (no API key needed).

Enables AI assistants to search places and addresses, compute driving, walking, and kickboard routes, optimize waypoints, and calculate distance and time matrices. Results can be displayed as interactive maps within conversations.

Provides real-time cryptocurrency prices, market cap, and 24h change using CoinGecko, with free access and no API key required.

Enables UPS shipping operations on your own UPS account: negotiated rate shopping, live tracking with an interactive MCP Apps card, and landed-cost estimates for international shipments.

Enables Claude to control the AI Coach desktop pet, making the mascot react to the conversation, accept care, show messages, act out activities, preview local files, and manage user memos.

MCP server demo by Banco D that shows a loan application interactive widget across six steps, demonstrating three levels of agent visibility (full, result-only, and hidden) per MCP Apps (SEP-1865). It enables users to simulate a loan request with plan selection, PIN authorization, and disbursement while controlling what the agent sees.

Enables AI assistants to look up futures prop firm rules with each rule's verification status and cited source, run 217 tested technical indicators and candlestick patterns, and compute Setup Odds for intraday setups on the user's own bars, all through read-only tools that need no account or API key.

MCP server for B2B lead generation and company search using the Generect Live API. Provides tools to search leads, companies, generate emails, and get lead by URL.

Enables MCP clients to obtain cited answers with paragraph-level source checks, verify drafts against provided sources, and manage research runs, credits, and pricing.

An MCP server for Action1, a cloud-native RMM platform, enabling remote monitoring, patch management, and endpoint management through Action1's API.

An MCP server that provides live status updates for the Eco via Sirens game server, displaying meteor countdowns, player statistics, and world information directly within Claude Desktop. It also serves as a minimal reference implementation for building MCP Apps in Python without complex tooling.

Turns any idea, blog post, or article into hand-drawn Tinku illustrations that explain key concepts, with an interactive viewer in the chat.

A design harness for AI coding agents. Better Design gives an agent design systems, UI and UX principles, icons and UI review: it finds or creates a design system that fits the product and installs its components, explains how sign-up, forms and onboarding should work, and reviews finished screens for readability, accessibility and unclear copy.

Pay the provider's own price. No markup, no subscription. Use 400+ Vercel AI Gateway models, including Veo, Kling, Seedance, Nano Banana and GPT Image, to make video, images, voice and text right inside Claude, ChatGPT or any MCP app. Deploy your own copy to Vercel in one click; every call is billed to your own Gateway credits.

Connects AI assistants to web page content and Google search results, enabling them to retrieve HTML, Markdown, or screenshots from a URL, run Google queries, and check account plan and token usage. It supports hosted OAuth sign-in as well as local and self-hosted deployments with an API key.

Enables users to set up and run an affiliate program from any MCP client in plain language, including planning commissions, creating campaigns, adding tracking, inviting affiliates, approving sales, and viewing payouts. It relays requests to a hosted backend using the user's sign-in or API key, with plan limits and audit logging applied.

This MCP server enables MCP Apps-compatible hosts to render an interactive React-based UI and invoke a sample tool over streamable HTTP or stdio transports.

Provides live product search, offer comparison, and price history retrieval from BestPrice.gr through three read-only tools, enabling AI applications to query shopping data without an API key.

AI reads your codebase like a book - one page at a time. Pharaoh gives it the index and a map of how every chapter connects.

Enables recording how React components render in headless Chrome and explains the main performance problem in a card inside Claude.

Enables agents to search, explore trending content, retrieve video metadata and hot comments, and obtain subtitle transcripts for summarisation on Bilibili, with an anonymous tier and an optional account tier for personalized feeds.

The best free social media publishing and scheduling API. Publish to 11 platforms from a single API call. Schedule posts, upload media, track analytics, and automate your social media workflow.

An MCP server for SuperOps PSA/RMM, enabling MSPs to manage tickets, assets, clients, and field technician operations through SuperOps's API.

MCP server for Checkpoint Harmony Email & Collaboration (Avanan). Enables AI assistants to manage email security, anti-phishing, anti-malware, and threat detection via the Avanan API.

MCP server for Sherweb Partner API - distributor billing, service provider management, customer subscriptions, and payable charges

Read-only Bitcoin market data and indicator explanations: the Bitcoin Barometer heat score and zone, eight on-chain and market indicators, and score history. No API key, no tracking.

Enables interaction with the Xero Accounting API to manage contacts, invoices, payments, accounts, and financial reports. It provides a suite of tools for natural language access to accounting records and business performance data.

An MCP server for Abnormal Security, enabling management of threat detection, email security cases, and AI-powered attack protection through Abnormal's API.

Enables MCP clients such as Claude Code, Codex, and Cursor to run Textile Designer AI's textile design tools on image files and URLs — upscaling, repeats, background and watermark removal, channeling, colourways, vectorizing, and more — and save the results locally. Handles device-code account login, plan and credit checks, cost estimates, and job status/download for long-running runs.

Provides programmatic access to the FDIC BankFind Suite API, enabling users to query public data on FDIC-insured financial institutions, bank failures, and branch locations. It supports advanced filtering for financial reports, demographics, and institutional history without requiring an API key.

Open-source home design and floor plan editor for AI agents: draw walls and rooms, place furniture, doors and windows, build kitchens and wardrobes, check lighting, ergonomics, electrical and plumbing against building codes, and render the plan, 3D views or photorealistic images. Runs in the desktop app, the browser or the hosted server, and every change can be undone.

MCP server for KnowBe4 — security awareness training, phishing simulation, and user risk management API integration

Enables MCP clients to manage X/Twitter advertising campaigns, ad groups, audiences, pixels, and creative assets via the Ads API v12, with safety defaults like paused writes and explicit confirmations for spend and deletions.

Enables AI assistants to look up travel times for driving, walking and cycling, turn-by-turn directions, multi-stop route plans, place details with opening hours, and map images, all from Google's map data. It works read-only without an API key, billing or a Google account, and renders routes and places as interactive cards in supporting clients.