"How to obtain an API key" matching MCP servers:

Enables listing, reading, and searching daily AI news from AI Daily Insights with structured tools and no API key required.

Enables sentiment analysis of text blocks using the Api Ninjas API, returning sentiment scores and overall sentiment classification for up to 2000 characters of text.

an api wrapper for the us government info api

This read-only remote MCP server lets AI clients query a curated catalog for AI-assisted development and agent workflow articles, retrieve recent posts or daily snapshots, and obtain source metadata and links to the originals for review and summarization.

Enables fetching Google's AI Overview answers and cited sources as structured JSON, with support for batch queries and country/language targeting.

Give AI agents cited funding, money-market, FX and capital-market evidence through 16 public MCP tools. Keep source dates, freshness checks and coverage gaps attached; China macro coverage is metadata-only. No API key is required for the public surface. Research context only; no trade execution.

CNN's Fear & Greed index for the US stock market: current score and rating, the seven component indicators, and about a year of daily history. Go standard library only, no API key required.

Enables researching YouTube channels and videos by listing uploads, reading transcripts, extracting frames, and searching, without needing a YouTube API key.

Query verified pricing, aggregated user ratings, feature comparisons, and category rankings for 508+ SaaS, AI, and security tools across 45 categories. No API key required - install with npx @comparedge/mcp-server

Startup engineering acceleration signals for VC investors. Tracks commit velocity, contributor growth, and repo expansion across 20 sectors via public GitHub data. No API key required.

An MCP server that enables AI agents to query RevenueCat's subscription analytics API using natural language, retrieving metrics like MRR, churn, and revenue.

Enables users to query news mention volume time series, growth percentages, and live Google News feeds as an MCP tool, integrating with AI hosts like Claude and Cursor.

MCP server for key driver and feature importance analysis based on rule mining

Enables AI hosts to query App Store download trends, growth percentages, and live top charts, along with 30+ other trend data sources, through MCP.

An MCP server for the U.S. Census Bureau's International Trade Data API, enabling queries of monthly export and import statistics by HS, NAICS, end-use, and other classifications, with tools for trade balance, top partners, and country code lookup.

Real human judgment as agent tools -- an AI agent can ask a question and get back a structured, schema-validated JSON answer from a real quality-scored human. 16 response types (yes/no, ratings, rankings, A/B tests, sentiment, image/video/audio review, voice/video/photo capture). Fully programmatic signup with a $5 free trial credit, no card required.

MCP server for UNICEF child development statistics. Query 790+ child-focused indicators across 200+ countries with disaggregations by sex, age, wealth quintile, and residence. No API key required.

Enables AI to query Reddit discussion volume trends, growth rates, and top topics for any keyword without hitting Reddit API limits.

A keyless MCP server that lets agents search YouTube across multiple languages and queries, pull transcript highlights, ranges or query-matched passages, fetch real video frames, comments, chapters and channel outlier scores, all without an API key, OAuth or cookies. It also ships a research skill that plans multi-language queries, fans out to subagents, spot-checks quotes and reports coverage.

Enables AI clients to analyze any company domain and determine its AI maturity tier (commercialized, deployed, declared, or none) with supporting evidence, via a single tool backed by an Apify actor.

Airtight math tools an AI uses over MCP — 3.7M-theorem search, PSLQ constant ID, OEIS, real Lean kernel checks, applicability checklists. No LLM inside, no API key.

An MCP server that searches across the Internet Archive and Library of Congress at once, merging results while keeping each archive's differences. Provides tools to search inside texts, search catalogues, and retrieve item records, all read-only and without an API key.

Enables agents to search and analyze US federal procurement data across SAM.gov opportunities, FPDS awards, SAM entities, FFATA subawards, exclusions, and full-text solicitation attachments, with 6 tools for market research, opportunity discovery, teaming, pricing, and compliance.

Zero-auth hosted MCP for AI builders: optimize/convert images (WebP/AVIF/JPEG), paste-ready SVG QR codes, plus cited Cleanor Labs data on device storage capacity and next-gen image-format savings. No API key or signup.

Clinical research MCP server providing real-time access to PubMed (35M+ papers) and ClinicalTrials.gov (400K+ trials). Built for trial coordinators and life sciences teams. No API key required.

Exposes NCBI PubMed as MCP tools for searching literature, fetching abstracts, exploring citation graphs, and finding author publications without requiring an API key.

Provides access to live UK Parliament data including bills, votes, MP profiles, and financial interests without requiring an API key. It enables users to track parliamentary rebellions, search petitions, and cross-reference voting records with declared financial interests.

An MCP server for Perplexity's Agent API, enabling multi-step web research with citations through tools to start, collect, and cancel research runs.

Schedules, scores, odds, splits & explainable AI bet confidence — 8+ sports, free instant key.

Agent-readable feed of AI and agent tech news (framework releases, security advisories, compliance deadlines, classified hourly) and upcoming live events. Read anonymously; post items with a free API key.

Enables an LLM to search and research Goodreads books, ratings, and reviews using public data, without login or writes.

Enables AI agents to search and read PubMed academic literature directly, without requiring an NCBI API key.

Academic peer-review (HAKEM), research-gap finding, journal recommender (1,214 venues with predatory flags), duplicate publication checker, and article writer tools from Science AI Journal. Free local FTS5 tools + LLM-backed tools that bill the caller's account.

Deterministic US equity-compensation tax optimizer. Six tools cover ISO/AMT exercise scheduling, NSO sell-vs-hold, RSU vest-and-sell, single-stock concentration, protective put / zero-cost collar pricing, and Section 1202 QSBS qualification. Federal plus 50-state plus DC tax math.

Enables searching and reading of AI/ML papers from conference proceedings and arxiv, with tools for full-text search, table of contents, and content grep.

Gateway connector between LLM agents and world data, providing access to financial market prices, macroeconomic indicators, and news through a bundled endpoint catalog.

Enables coding agents to query AI model API prices, including historical point-in-time lookups with cited sources, using a bundled dated dataset and requiring no API keys.

Vedic astrology MCP server providing 6 tools: horoscope predictions (200+ life aspects), compatibility match reports with Kuta scoring, Chaldean numerology, raw planet and house chart data, 24 general astro properties, and Ashtakvarga charts. Free tier included with no API key required, premium unlimited tier also available

An MCP server for searching and accessing RNA sequencing datasets from the European Nucleotide Archive (ENA), supporting bulk, single-cell, and spatial transcriptomics with advanced filtering and download capabilities.

Enables searching live job postings, aggregating labour-market slices, and reporting how long listings have been open, with filters for titles, location, salary, and more.