"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP connectors:
Matching Connector Tools:
Hosted AgentLux MCP server for marketplace, identity, creator, services, and social flows.
40 AI crypto tools: whale tracking, security scans, DeFi analytics, quantum security, and more.
49 developer tools via MCP: DNS, WHOIS, IP lookup, JWT, hashing, QR, and more.
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.
Agent registry with Nostr identity, reputation, escrow, observability, and Lightning payments.
Search and retrieve Avalanche blockchain documentation for building on AVAX.
AudioAlpha turns 100+ daily finance and crypto podcasts into structured intelligence — α-sentiment scores, narrative signals, asset mentions, transcripts, and market snapshots with 40+ custom metrics. Built for AI-driven research and trading workflows.
Financial podcast intelligence platform — sentiment, narrative, and asset signals from 100+ podcasts
A self-improving memory layer. Your memory, notes, tasks and goals, remembered everywhere.
Decentralized AI agent labor market on Ethereum. 15 tools for on-chain job lifecycle.
Official MCP server for Certifier to issue, manage, and track certificates and badges.
1,589 tools, 102 services. Stripe, Slack, CRM, GitHub, Supabase + 97 more. One install.
Crypto market data for AI agents via x402. 16 tools: prices, funding, DeFi yields, arbitrage, TA.
Enterprise code intelligence for M&A, security audits, and tech debt. Hosted server with 200k free.
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.
MCP server exposing T54 XRPL x402 seller SKUs (OpenAPI) as tools: structured query, research brief, commerce data, and related routes. HTTP 402 + x402 settlement via broker (XRPL / Base USDC per env). Unified HTTPS host with health at /health.
AI-verified knowledge base with trust scoring, temporal facts, and skill cards.
Generate AGENTS.md, AP2 compliance docs, checkout rules, debug playbook & MCP configs from any repo.
AgentMail is the email inbox API for AI agents. It gives agents their own email inboxes, like Gmail
A Remote MCP Server that checks every email before your agent acts on it. Connect via MCP protocol, pay per use with Skyfire.
Create high quality presentations with AI
Real-time Amazon data API built for AI agents. 200M+ products, 1B+ reviews, live BSR, pricing, and competitor data as clean JSON. 10 agent skills for market research, competitor monitoring, pricing analysis, and listing audits.
US business bankruptcy data via MCP: search by name, EIN. Lookup docket items.
Agent-to-agent marketplace MCP server. Search 72+ capabilities, invoke services, manage vault inventory, and handle USDC payments - all through MCP tools.
Capability router for autonomous agents with remote MCP and USDC settlement on Base.
Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.
ClearPolicy is a document signing and compliance tracking tool for organizations. Once connected, your AI assistant can import documents, send signature requests, track who has and hasn't signed, and manage your contacts — all by prompt.
Free MCP tools: the only MCP linter, health checks, cost estimation, and trust evaluation.
Remote enterprise management of Android devices and apps
Remote MCP server for EDD memos, OFAC screening, Monte Carlo reports, and document output.
Flight search & booking for AI agents. 400+ airlines, $20-50 cheaper than OTAs.
Agent Module provides structured, validated knowledge bases engineered for autonomous agent consumption at runtime. Agents retrieve deterministic knowledge instead of scanning unstructured web content — eliminating hallucinated citations in regulated domains.
EU AI Act compliance knowledge for autonomous agents. Deterministic, structured, MCP-native.
Deterministic compliance and vertical knowledge bases for autonomous agents. Free 24hr trial.
Connect AI coding agents to Anima Playground, Figma, and your design system.
AI-powered eSIM recommendation agent for travelers. Provides real-time coverage checks, package search by country, and pricing across 190+ destinations via structured tool calls. Tools available: - list_countries - full list of supported destinations - check_coverage - network operators by country code - search_packages - filter eSIM plans by country - get_package_details - pricing and data specs - create_checkout - generate payment link for purchase No auth required for search tools. Ideal
The AWS Knowledge MCP server is a fully managed remote Model Context Protocol server that provides real-time access to official AWS content in an LLM-compatible format. It offers structured access to AWS documentation, code samples, blog posts, What's New announcements, Well-Architected best practices, and regional availability information for AWS APIs and CloudFormation resources. Key capabilities include searching and reading documentation in markdown format, getting content recommendations, listing AWS regions, and checking regional availability for services and features.
Visit https://brave.com/search/api/ for a free API key. Search the web, local businesses, images,…
ClaimHit runs 9 frontier AI models simultaneously to find products and technical standards that potentially infringe your patent in about 60 seconds. Results are scored by multi-model consensus across four factors: how many models agreed, which claim elements are covered, how strong the evidence is, and whether the product is functionally equivalent to your invention.
**ColdState Knowledge Search MCP Server** https://github.com/daniel-coldstate/coldstate-mcp Semantic search over 64.6M knowledge entries — the structured alternative to web search APIs and web scraping for LLM agents. No crawling, no rate limits, sub-3s responses. Cloud-hosted at services.coldstate.ai
Agentic commerce MCP: live Shopify catalog + inventory + AI citation measurement
AI service marketplace — agents discover, call, and pay for API services automatically.
AgentPMT is the AI agent marketplace that turns any MCP-compatible AI assistant into an autonomous employee. Connect once and your agents gain access to a growing ecosystem of tools, workflows, and skills spanning communication, data analytics, development, file management, search, and more. AgentPMT dynamically discovers and orchestrates tools from across the MCP ecosystem, so your agents can independently find the right tool for any task without manual configuration.
Check website AI-readiness: Schema.org, llms.txt, E-E-A-T, robots.txt. Works in Cursor & Claude.
County GDP, personal income, and employment from the Bureau of Economic Analysis
MCP server that delivers up-to-date Bitrix24 REST API documentation.
Book discovery using an AI-curated book catalog that eliminates hallucinations and surfaces lesser-known titles.
Leading causes of death, mortality rates, infant mortality, and drug overdose data
A managed AI marketing agent that plugs into all your AI tools. Ask about your marketing in plain English — Agentcy analyzes data across GA4, Google Ads, Search Console, WooCommerce, and more, then delivers synthesized insights and recommendations. Not a data dump. Not a dashboard. An agent that thinks. Sign up at goagentcy.com to configure your domains and data sources. Free plan includes 50 requests/month — paid plans start at $29/mo.
Scan any website for AI agent readiness, payment protocols, and discovery endpoints
MCP server for static security analysis of Android source code
Model Context Protocol server for the Apideck Unified API. Connect any MCP-compatible agent framework to 100+ accounting systems, HRIS platforms, file storage providers, and more through one integration. More information https://www.apideck.com/mcp-server
Art Institute of Chicago MCP — wraps the ARTIC public API (free, no auth)
Unemployment rates, labor force, and Consumer Price Index from the Bureau of Labor Statistics
Book appointments with service providers on booboooking.com — no token required.
Search 60,000+ AI agent skills via MCP. Supports 7 languages (EN/ZH/JA/KO/DE/FR/ES). Free, no auth required.
Search 585+ free cancer support resources across Washington State in 7 languages