"An MCP to access OpenAI's RAG system via API" matching MCP servers:

MCP server providing access to Russian Railways ticket API, enabling train search, station lookup, and trip information.

Real-time last-minute tour and activity booking across 18 suppliers in 15 countries via the OCTO open standard. Search available slots, create Stripe checkout sessions, and check booking status.

55+ pay-per-call tools for AI agents over MCP: live telemetry, blockchain/on-chain checks, environmental, transit, finance, and network utilities. No API key or signup — agents pay per request with x402 USDC micropayments (Base and Solana).

Enables users to plan Singapore itineraries by combining a retrieval-augmented knowledge base with live weather forecasts and currency conversion through MCP tools.

Enables AI assistants to interact with the GoodPass API for searching products, retrieving details, checking availability, pricing, and managing orders.

Enables AI assistants to access South Korean tourism information via the official Korea Tourism Organization API, providing comprehensive search for attractions, events, food, and accommodations with multilingual support.

Enables AI clients to search discounted private-jet empty-leg flights, retrieve flight details, obtain booking links, estimate charter prices, and submit charter enquiries.

Enables realtime bus arrival queries, route and stop searches, nearby station lookups, and transit planning for Chelaile-supported cities through MCP tools.

Search, localized specs (180 spec types across 19 categories), compare, and structured filters over 102k+ vehicle variants in 19 languages, from cars-data.com.

Enables finding the cheapest flight destinations from an airport as structured JSON, with bargain detection via typical price comparisons and booking links.

Enables AI clients to search Tripadvisor hotels, restaurants, and attractions and fetch full review streams through the Apify MCP server. Integrates with Claude, ChatGPT, Cursor, and other tools via natural language.

Provides live hotel room rates, availability, and guest reviews from Agoda, enabling searches by destination and dates, property details, and structured review data.

Enables AI clients to search trips, find locations, and manage bookings through the Flowteller backend.

Enables AI assistants to search for and book hotels via the Amadeus Travel API, providing hotel listings, offers, and booking capabilities.

An MCP service for interacting with Transport NSW's API that enables users to find transport stops around locations and retrieve information about transport alerts and disruptions.

Enables AI agents to integrate with UPS shipping and logistics capabilities, including package tracking with delivery status and transit information, and address validation for U.S. and Puerto Rico locations.

Enables flight search capabilities through the Amadeus Flight Offers Search API, allowing users to search for flights between locations with specified dates using natural language queries.

Integrates Kuaidi100 logistics services to provide real-time package tracking, delivery time estimations, and shipping cost calculations. It enables users to query express delivery information directly through an MCP-compatible interface.

Enables interactive trip planning and booking through MCP Apps cards, with constraint-based scoring, cross-session memory, and a two-phase booking flow that requires explicit confirmation before charging.

Enables AI agents to query real-time fuel station availability and summaries across Thailand via MCP tools.