"Free APIs and services without commercial fees" matching MCP servers:

Pay-per-call access to SEO and SERP data, keyword research, backlink and site audits, local business search, SMS verification, social marketing, EU-hosted LLM inference, and read-only on-chain calls. No signup and no API key: agents pay per request in USDC on Base via x402.

Enables AI assistants to interact with LinkedIn and LinkedIn Sales Navigator for searching profiles, managing leads, and handling messaging via cookie-based authentication. It supports professional networking tasks such as sending connection requests and retrieving account details through the Model Context Protocol.

Provides AI agents with access to trending topics from Reddit and HackerNews using free public APIs without authentication.

Real-time LinkedIn, X (Twitter) and Reddit data for AI agents: profiles, companies, people search, tweets, subreddits, and search. Free start: self-mint a key in one call, no signup, no card.

Live Elon Musk & Ted Cruz tweet feed, real-time tweet counters, and market data for Polymarket's tweet-count markets. Hosted remote server (streamable-http at https://polystrike.xyz/mcp); free tier is keyless.

Exposes JustOneAPI endpoints as MCP tools, returning raw upstream JSON without field parsing for maximum data fidelity.

Analyzes public Instagram post URLs, returning captions and photos as image content for multimodal models like Claude, without requiring paid vision APIs.

Enables AI agents to interact with the Stars Cash Flow reseller API for real Telegram actions, including listing services, checking balance, creating orders with cost confirmation, and managing orders.

MCP server that wraps Meta's Messenger Platform, Instagram Messaging, and comment moderation APIs as semantic tools for LLM agents to read inbox, reply, and moderate comments.

Enables fetching tweets, threads, and converting them to blog posts without requiring a Twitter API key.

Enables MCP agents to perform native X (Twitter) searches with original-post citations and transparent usage tracking. Supports existing Grok login sessions or explicit xAI API billing without runtime dependencies.

A dependency-free MCP server that reads Reddit through its RSS feeds, enabling search, browsing subreddits, and reading post comments without any API keys or authentication.

Local-first MCP server using LinkedIn's official OAuth and REST APIs to connect a member account, read profile, and publish text posts.

Free MCP server for fetching social media metrics (views, likes, comments) from public post URLs across YouTube, Twitter, TikTok, and Instagram. No API key needed.

Provides AI agents with unified access to 21 social media platforms and 105 endpoints for retrieving profiles, posts, comments, search results, trending content, and analytics without per-platform authentication.

A local-first MCP server for auditing, drafting, and planning updates to your personal LinkedIn profile safely, without automation or scraping.

A lightweight MCP server that provides read-only access to Xiaohongshu (Little Red Book) data, enabling search, note details, user profiles, and trending feeds via direct HTTP APIs.

TikTok creator toolkit for AI assistants. Four tools: download watermark-free videos by URL, look up curated 15-hashtag sets for 15 niches with strategy tips, retrieve best posting times for 12 countries, and generate viral hook formulas across 8 categories. Stdio transport, runs via npx -y tiktapdown-mcp, no API keys, no signup, free. MIT license.

An MCP server that provides LLM clients with direct access to XTapDown's Twitter creator toolkit, enabling tweet downloads, engagement calculations, content generation, and trend analysis without authentication or rate limits.

A production-oriented MCP server foundation for connecting Claude Desktop to social-media and marketing platforms, featuring a reusable connector framework and an optional Meta connector using official APIs.