"An MCP that can programmatically interact with any online API" matching MCP servers:

Dynamically converts any API with an OpenAPI v3 specification into MCP tools for AI assistants. It supports multiple authentication methods including OAuth2, Bearer tokens, and API keys for flexible integration.

Provides phone intelligence for AI voice agents, enabling inbound caller identification, outbound risk assessment, line type detection, and do-not-contact checks via four read-only MCP tools.

Provides verified event dates, countdown semantics, and custom countdown sharing from Countdowns Online to MCP-compatible AI clients.

Enables AI clients to retrieve verified countdown event dates, semantics, and FAQ from Countdowns Online, allowing users to browse event categories and understand date contexts without API keys.

MCP server for ATOL Online fiscal receipt API. Enables 54-FZ compliant receipt generation, refunds, corrections, and status checks for Russian online cash registers.

Enables interaction with MongoDB databases through CRUD operations, aggregation, and schema discovery, with automatic field validation and ObjectId conversion.

このMCPサーバーは、EVE Onlineのマーケットデータにアクセスするためのインターフェースを提供します。ESI（EVE Swagger Interface）APIを使用して、リアルタイムの市場データを取得できます。

A configurable MCP server that adapts any HTTP API into an MCP toolset with generic HTTP tools (GET, POST, PUT, DELETE) and pluggable authentication. Includes API discovery scripts and supports dynamic tool generation from OpenAPI specs or wordlist scans.

Zero-config MCP server for SharePoint Online that enables managing sites, pages, navigation, and branding via natural language, with automatic device code authentication and no Azure registration required.

Hosted MCP server for Exact Online. Ask questions, pull reports, and prepare bookings you approve first.

Enables AI agents to analyze whether they should send an email, evaluating passive aggression and regret probability with a recommendation heavily weighted toward no.

Provides complete coverage of the QuickBooks Online Accounting API v3, enabling queries, financial reports, sales and expense management, and write operations with deployment-controlled access.

Exposes the Porn Game Online directory knowledge surface including scope, FAQ, and official links to MCP clients like Claude Desktop, Cursor, Windsurf, and Continue. Read-only, no API keys required.

A remote, read-only MCP server for the CAN-IMMUNE cancer neoantigen platform, enabling AI agents to query the database in plain language. It provides tools for searching genes, cell lines, mutations, and MHC binding data.

Enables reading and creating invoices, and looking up customers and items in QuickBooks Online via natural language.

MCP server that integrates with OneDrive and Excel Workbooks via Microsoft Graph API for creating and modifying worksheets.

An official MCP server for Online Tone Generator. Discover audio frequencies for instrument tuning, acoustic testing, meditation, and generate direct listening links.

An MCP (Model Context Protocol) server that provides OSINT (Open Source Intelligence) capabilities for EVE Online using multiple APIs including ESI, EveWho, and zKillboard. This server allows AI assistants to gather comprehensive intelligence on EVE Online characters, corporations, and alliances by

Read-only MCP server exposing Flux-2 Online's image generation knowledge surface, including styles, pricing, FAQ, and official links, with no API key required and ~50 ms cold start.

Free DEX aggregator API that returns executable swap calldata across 46 EVM chains. No API key required. Single GET request returns ready-to-sign transactions for any token pair.