"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
European directory of freight carriers: find carriers by route, equipment and certificates.
Public chauffeur information, policies and anonymous price previews in the provider’s published service areas. On explicit customer request, prepare a binding unpaid offer using email OR E.164 phone, without an account. Customers review bound terms and explicitly confirm in Samuelz checkout. The same endpoint provides OAuth-protected booking status, payment review, history, and amendment/cancellation workflows. Booking data and actions require authorized customer access; changes and cancellations require the applicable object-bound consent. Tool discovery is public. Quotes do not guarantee availability, and MCP does not take payment.
Neutral freight reference + validation layer for AI agents: ADR, HS, UN/LOCODE, freight math
6 runtime tools: 2 HemmaBo tools, 2 host onboarding tools, and 2 VRP verification tools. Not an OTA.
Plans a short, walkable night out for people of legal drinking age where they are. Give it a place and it returns 2-4 stops from venues DrinkedIn has validated against an official licence register or premises census, or the venue's own website, with walking estimates and an optional share link. Free, no sign-in. DrinkedIn does not sell or serve alcohol and books nothing.
Real-time Google Flights fares for agents. Three things people do with this server. Scan for deals: one call takes a date range and a list of destination airports, expands every combination server side, and returns each fare with Google's own low, typical or high verdict. Put live search in your app: flat JSON with a bookable link on every result, and round trips priced as paired legs. Run a 24/7 AI travel agent: add the server, sign in with Google, and schedule it. No ads, no sponsored content. You bring your own RapidAPI key, so every search is billed to your plan and never to anyone else's. Add https://flights.flightpowers.com/mcp , click Sign in, sign in with Google, and paste your RapidAPI key once on the page that opens. Scripts and clients without a sign-in button send the key as x-rapidapi-key on the same URL.
Hotels ranked by real comfort, not commission: search 30,000+ hotels by quiet, beds, WiFi and more
AI dispatch for food & local delivery: assigns orders to drivers, sequences stops, times departures.
Real-time Booking.com rates for agents. Three things people do with this server. Scan for rate gaps: price_as_seen_from prices the same room from another market, so an agent can sample a property across countries and compare. Put live search in your app: search a destination or look a property up by name, no internal IDs, room-level rates as flat JSON. Run a 24/7 AI travel agent: add the server, sign in with Google, and schedule it. No ads, no sponsored content. You bring your own RapidAPI key, so every search is billed to your plan and never to anyone else's. Add https://hotels.flightpowers.com/mcp , click Sign in, sign in with Google, and paste your RapidAPI key once on the page that opens. Scripts and clients without a sign-in button send the key as x-rapidapi-key on the same URL.
Read-only Maldives resort research for approved travel agencies. Search and compare published resorts, explore villas, dining, spas, dive centres, experiences, photographs and 360° tours, and return source links. An agency Bearer key is required. Directory evaluation credentials are available with limited resorts and request budgets. No prices, live availability, quotations or bookings. Documentation: https://resortlife.travel/docs
Free US moving quotes for AI agents (long-distance nationwide, local DC/MD/VA). Optional x402 quote.
Search and book 3M+ hotels in 200+ countries. Agents pay per reservation in USDC on Base over x402. Hosted, no auth.
Search and compare Carnival and Royal Caribbean cruises, itineraries, cabin offers and recorded price history. Explore Viator tours and activities at supported cruise ports. Free, read-only access with no account or API key required. Confirm final prices and availability with the provider.
Madeira hiking permit trails: availability for 120 days, fees, booking links and reservations.
Plan vehicle routes, job assignments and load packing from stops, fleet and constraints.
Get date-specific quotes and book private UK airport and cruise-port transfers through your AI assistant. Compare vehicle options, validate flights, retrieve bookings, amend details and cancel with customer confirmation. No registration required to start, subject to service limits; optional API-key and OAuth access for registered integrations. Transfer fares are payable separately and cancellation conditions apply. Live demo and connection instructions: https://ai.airport-pickups-london.com/ Technical documentation: https://mcp.airport-pickups-london.com/docs
CitedTravel gives AI agents and developers travel facts they can cite. It covers plug types and voltage, currency, emergency numbers, driving side, public holidays (3 years) and tipping norms for 195 countries, plus a visa/entry pilot for GB, US and JP passport holders. Every value comes with its sources (publisher, URL, license, verbatim quote), a last-verified date and a 0-1 confidence score with reasons. Data comes only from sources that allow commercial reuse, such as Wikidata, Unicode CLDR, UK FCDO, the US State Department and Japan MOFA. Entry answers quote official government pages and are decision support, never a go/no-go verdict. Remote MCP server (Streamable HTTP, 9 read-only tools) and REST API (OpenAPI 3.1). Answers in English, Japanese, Simplified and Traditional Chinese. Free: static facts need no key; a free key adds 1,000 calls/month. Paid: Builder $19/month, Pro $99/month, or x402 pay-per-call in USDC on Base.
SimFuse is a travel eSIM storefront covering 200+ countries and regions. This connector lets an AI assistant plan a trip, compare live prices and open a checkout for eSIM data. Browsing needs no authentication. What it does: - plan-trip: give the stops (country code and days in each) and it compares one plan covering the whole route against one plan per country against a mix, on live prices, then flags the cheapest complete option and lists any country it cannot cover. - list-destinations: search every country and region SimFuse sells for, with the cheapest plan price per destination. - list-plans and get-plan: browse a destination's plan ladder, filter by data amount, validity and price, and inspect a single plan in detail. - get-plan-coverage: check every country a plan works in before buying. - create-checkout-session: open a checkout for the selected plans at frozen prices. Nothing is charged by that call; payment, completion and cancellation happen over the agentic HTTP API with the returned key. Good to know: prices come back in minor units of the currency you ask for, data allowances are in megabytes, and quotes are offers rather than reservations, so the charged total is computed at checkout. Operated by Qorinx OÜ. Buy directly at https://simfuse.app, agent documentation at https://simfuse.app/agent/.
Real cost of car hire at 120+ airports: second driver, cover, deposits, debit cards, desk hours.
Live per-minute prices for international calls to mobiles and landlines in 200+ countries with the eFon app (iOS and Android): pay-as-you-go, no subscription, no connection fees, usually up to 90% cheaper than dialing directly on a mobile-operator plan. Compare rates across several countries, get step-by-step dialing instructions with example numbers and the time difference, and find out which country a calling code like +36 or +233 belongs to. Read-only, no API key or sign-in needed.
