Search: free
Search MCP servers and agent skills by name, description, category or topic — 240 results.
forgemeshlabs/aso-audit-mcp
Free Agent Signal Optimization scanner for website/API agent readiness. Scores discovery, identity, trust, commerce, reputation, and memory signals; validates robots.txt AI bot rules, llms.txt, agent.json, Google A2A agent cards, MCP server cards, API catalogs, OAuth metadata, x402, pricing, security.txt, status endpoints, and cross-file identity consistency. Returns ASO maturity levels, evidence,
lisamaraventano-spine/mcp-server
The Underground Cultural District MCP server. 23 tools for AI agents: 13 free developer utilities (UUID, JSON formatter, Base64, hashing, JWT decoder, regex, cron, ETH converter), 7 paid creative tools, and a browsable marketplace of 218+ digital goods across 22 shops. npm: `@underground-cultural-district/mcp-server`
Logitale/toreador-mcp-server
Generate crypto QR codes (BTC, ETH, SOL, USDC, USDT, EURC) and manage payment sessions from Claude Desktop or any MCP client. Non-custodial, free.
Fabio662/yieldagentx402-sdks
Custody-free, policy-gated, receipt-backed execution layer for AI agents. 16 MCP tools across 18 chains (Base, Ethereum, Bitcoin native, Starknet, NEAR, Solana, Stacks, BNB, Rootstock, Filecoin, Aptos, Sui, TON, Tron, XRPL, Stellar, Algorand). One NEAR MPC key authority signs on EVM and BTC, no private keys held anywhere. ShadeGuard policy enforcement, Intel TDX TEE attestation, HMAC-SHA256 receip
summerstateofmind/cityparity
Cost-of-living and quality-of-life comparison across ~165 cities: take-home pay, taxes, the equivalent salary you'd need in the target city, and the non-cash deltas people move for (childcare, healthcare, statutory vacation, parental leave). Free, no API key, hosted Streamable HTTP.
tunedforai/x402-mcp
Real-time crypto market structure for AI agents — orderflow across 20 exchanges, 24 tokens. 9 tools: price/funding/OI snapshots, cross-exchange CVD with whale activity, 7yr OHLCV history with buy/sell flow, on-chain address risk. Free via MCP ([`@tunedforai/x402-mcp`](https://www.npmjs.com/package/@tunedforai/x402-mcp) on npm) or pay-per-call in USDC on Base via x402 REST at [`x402.tunedfor.ai`](h
PostalDataPI/postaldatapi-mcp
Global postal code lookups, validation, and city search for 240+ countries with timezone, admin region, and elevation metadata. Sub-10ms responses at $0.000028/query with 1,000 free queries on signup.
SelfPy/science-ai-mcp-server
Academic peer-review and research workflow tools from [Science AI Journal](https://scienceaijournal.com): Pre-Check (paper-tier prediction), AI multi-agent peer review, Research Gaps Finder, Journal Recommender (1,214 venues with predatory-journal flags), Duplicate Publication Checker (CrossRef/arXiv/medRxiv/bioRxiv/Unpaywall/900k-paper library), and the Article Writer pipeline. Free local tools (
Gaoshan0971/digeguigui
Global reptile & exotic pet knowledge base. 633 species, AI identification, genetics calculator, 12-dimension care, health diagnosis, pricing, and blockchain provenance. Free tier: 9 tools, 10 req/min. MCP: https://api.digeguigui.com/mcp
KOVY/agentforge-trust-mcp
Query the AgentForge Trust Score (0-100 across five dimensions: security, code health, behavioral audit, community trust, EU compliance) for any MCP server before connecting. Exposes `check_trust`, `evaluate_policy`, `list_trusted`, and `recommend` tools. 3,600+ servers audited, free public API.
Bichev/agentradar-mcp
On-chain trust oracle for the ERC-8004 + x402 agent economy. 18 tools for verifying AI agents: 6-signal composite trust scoring (0-100), 272-wallet scam database, ERC-8004 identity lookup, EAS attestations on Base mainnet. x402-payable. Free `get_score` / `check_scam`. Live at [vvpro.ai](https://vvpro.ai) · npm [`@agentradar/mcp`](https://www.npmjs.com/package/@agentradar/mcp).
drashrafsaiyed-cyber/instagram-mcp
Control Instagram from Claude: publish photos, reels, and carousels, read account insights, manage comments, and reply to DMs. 14 tools via the Instagram Login API. One-click free Render deploy for Claude Web and mobile.
Vincentwei1021/agent-toolbox
Production-ready MCP server providing 13 tools for AI agents: web search, content extraction, screenshots, weather, finance, email validation, translation, news, GeoIP, WHOIS, DNS, PDF extraction, and QR code generation. 1,000 free calls/month, no setup required.
hoklims/stacksfinder-mcp
Deterministic tech stack recommendations with 6-dimension scoring. Analyze, compare technologies, get optimal stack suggestions for any project type. 10 tools (4 free, 6 Pro).
mnlt/wellread
Shared research cache across AI agents. Hit → instant answer from verified sources. Miss → your research saves the next dev's tokens. `npx wellread`, free.
wkalidev/multichain-mcp
Read balances/prices and prepare transfers across Stacks, Celo, and Base from one MCP server — no RPC keys required to start. Free tier (`get_balance`, `get_prices`) plus license-gated Pro/Team tools (`get_portfolio`, `prepare_transfer`, `deploy_token`). `npx @wkalidev/multichain-mcp`
reefapi/reefapi-mcp
One MCP for 160+ live web-data APIs — search engines, social (Reddit, TikTok, Threads, Bluesky), e-commerce (Amazon, eBay, AliExpress, Etsy), real estate (Zillow, Redfin), jobs, travel, news, finance and company/people intel. Clean JSON from sites that block scrapers; one key, one shared credit pool, free tier. Remote streamable-http at api.reefapi.com/mcp.
pskill9/web-search
An MCP server that enables free web searching using Google search results, with no API keys required.
DappierAI/dappier-mcp
Enable fast, free real-time web search and access premium data from trusted media brands—news, financial markets, sports, entertainment, weather, and more. Build powerful AI agents with Dappier.
aparajithn/agent-scraper-mcp
Web scraping MCP server for AI agents. 6 tools: clean content extraction, structured scraping with CSS selectors, full-page screenshots via Playwright, link extraction, metadata extraction (OG/Twitter cards), and Google search. Free tier with x402 micropayments.
carrierone/verilexdata-mcp
20 structured datasets (NPI healthcare, SEC filings, OFAC sanctions, crypto whales, Polymarket signals, patents, economic indicators) via x402 pay-per-query with USDC. Free stats/sample endpoints, MCP + HTTP transport.
CryptoRugMunch/rug-munch-mcp
19 crypto token risk intelligence tools for AI agents. Rug pull detection, honeypot scoring, deployer tracking, holder deep-dive, KOL shill detection, social OSINT, and LLM forensic analysis. Free tier (1 call/day) + API keys + x402 USDC micropayments. Remote SSE transport available.
jacobsd32-cpu/djd-agent-score-mcp
Reputation scoring for AI agent wallets on Base. 9 tools: trust scores, fraud reports, blacklist checks, leaderboard, badge generation, and agent registration. Free + x402 paid tiers.
AgentBase1/mcp-server
AgentBase: open registry of agent instruction files for AI agents. Search and retrieve system prompts, skills, workflows, domain packs, and safety filters via MCP tools. 44 files, CC0-licensed, free.
Davison-Francis/min8t-sdks
`@deliveriq/mcp` — email-deliverability tools for AI agents. 12 tools: single + batch verification, email finder, DNSBL across 50 zones, SPF/DKIM/DMARC/MTA-STS/BIMI infrastructure analysis, spam-trap scoring on 13 weighted signals, composite domain trust report, account credits. 5-stage / 21-check pipeline under the hood. Free tier, no card. Install: `npx -y @deliveriq/mcp`.
node-man/dechonet-mcp
Domain security reconnaissance for AI agents. 13 tools — DNS + DNSSEC, SSL/TLS chain & grade, HTTP security headers, SPF/DKIM/DMARC email auth, TCP port scan, ASN, RDAP/WHOIS — plus a one-shot `security_scan` returning a 0-100 Health Score (A–F). Free, no API key. `npx -y dechonet-mcp`
farukkolip/tiktapdown-mcp
TikTok creator toolkit MCP — download videos without watermark, get curated 15-hashtag sets across 15 niches with strategy tips, look up best posting times for 12 countries, and generate viral hook formulas across 8 categories. No API keys, no signup, free. Install: `npx -y tiktapdown-mcp`. Companion to [tiktapdown.com](https://tiktapdown.com).
4dmrkey/cryptopolitan-mcp
Real-time cryptocurrency news, analysis, and price predictions for AI agents. 5 tools to search 50,000+ articles across 12 categories, filter by asset ticker (120+ coins), and access content with built-in attribution. Free with attribution. SSE and Streamable HTTP transport.
aparajithn/agent-deploy-dashboard-mcp
Unified deployment dashboard MCP server across Vercel, Render, Railway, and Fly.io. 9 tools for deploy status, logs, environment variables, rollback, and health checks across all platforms. Free tier with x402 micropayments.
namixai/funding-mcp
Multi-venue perpetual funding-rate data & cross-exchange funding arbitrage across 20+ exchanges (incl. HIP-3 sub-DEXes). Free screener; paid signals via x402 micropayments with built-in auto-pay. 3 tools, stdio. Install with `npx -y @usenami/funding-mcp`.
AgentModule/mcp
Agent-native knowledge infrastructure. Deterministic, vertical-specific knowledge bases engineered for autonomous agent consumption via MCP. Ethics module (22 modules, EU AI Act mapped) included with every membership. Free 24hr ethics trial.
agenticdecks/deckrun-mcp
Generate presentation PDFs, narrated videos, and MP3 audio from Markdown. Free tier requires no API key or local install — add a URL to your IDE config and start generating. Paid tier adds video, audio, async jobs, and account tools.
junipr-labs/mcp-server
Web intelligence API for AI agents — screenshot capture, PDF generation, page metadata extraction, and 75+ specialized data extractors for news, social media, SERP, pricing, and more. Free tier included.
Spix-HQ/spix-mcp
Give AI agents a real phone number and voice. Make outbound calls, handle inbound calls, send email, and manage contacts via 26 MCP tools. ~500ms voice latency (Deepgram Nova-3 + Claude + Cartesia Sonic-3). Install: `pip install spix-mcp`. [Free tier available](https://spix.sh).
Jambozx/onlinecybertools-mcp-server
280+ free developer & security tools as MCP tools — encoders/decoders, hashes (MD5/SHA/HMAC/bcrypt/argon2/scrypt), JWT decoder, regex tester, JSON/YAML/XML formatters, network diagnostics (ping/traceroute/dig/whois/SSL/SPF/DMARC), OSINT (IP geo, EXIF, vendor lookups), and more. Proxies to the public API at onlinecybertools.com — no auth required. Published to npm with SLSA v1 provenance.
kindly-software/kdb
AI-powered time-travel debugger with bidirectional execution replay, audit-compliant hash-chain logging, and SIMD-accelerated stack unwinding. Free Hobby tier available.
atmospore/atmospore-mcp
Per-species pollen forecasts at any point on Earth, seven days ahead, via the Atmospore API. Tools: `get_pollen`, `get_top_species`, `get_area_average`, `list_supported_species`. Free tier (100 calls/day, no credit card). Hosted variant at `mcp.atmospore.com`.
autonsol/sol-mcp
Solana token risk scoring and pump.fun graduation signals. Score any token by mint address (0-100 risk, risk_label, holder concentration, liquidity), detect graduation momentum (buy/sell ratio, velocity), and query trust attestations. Live API. Freemium — 4 free tools, PRO via x402 micropayments ($0.01/call USDC).
rnwkr7rscy-lang/fittin-mcp
Patent prior art search and startup IP intelligence for AI founders. Clone risk score, defensibility map, patentable features, competitor patent landscape — free analysis in ~2 minutes. Full IP Portfolio Package (6 documents) available for $99. `pip install fittin-mcp`
alberthild/shieldapi-mcp
Security intelligence for AI agents: password breach checks (900M+ HIBP hashes), email/domain/IP/URL reputation, prompt injection detection (200+ patterns), and skill supply chain scanning. Pay-per-request via x402 USDC micropayments or free demo mode, no API key needed.
GUCCI-atlasv/skillssafe-mcp
Free AI agent skill security scanner. Scan SKILL.md, MCP configs, and system prompts for credential theft, prompt injection, zero-width character attacks, and ClawHavoc indicators. Supports OpenClaw, Claude Code, Cursor, and Codex. No signup required.
eyloni/pythia-oracle
Oracle for AI agents that need to think past obvious answers. One tool, one reading. Free tier included.
sonnyflylock/voxie-ai-directory-mcp
AI Phone Number Directory providing access to AI services via webchat. Query Voxie AI personas and third-party services like ChatGPT, with instant webchat URLs for free interactions.
andreas-roennestad/openhive-mcp
Shared knowledge base where AI agents search and post problem-solution pairs. Agents query before solving, post after resolving. Semantic search via pgvector, duplicate detection, auto-scoring. `npx openhive-mcp`, Free to use
gpartin/CryptoGuardClient
Per-transaction deterministic crypto validator for AI trading agents. Validate trades (PROCEED/CAUTION/BLOCK), scan tokens, detect rug pulls — powered by WaveGuard physics engine. 5 free calls/day, x402 USDC payments. `pip install CryptoGuardClient`
janswist/mcp-dexscreener
Real-time on-chain market prices using open and free Dexscreener API
oerc-s/primordia
AI agent economic settlement. Verify receipts, emit meters (FREE). Net settlements, credit lines, audit-grade balance sheets (PAID/402).
omni-fun-mcp-server
Multichain memecoin launchpad across 8 chains (Base, Arb, OP, Polygon, BSC, ETH, Avax, Solana). Tokenize yourself as an oMeme — earn 0.5% creator fee forever + 50% Uniswap V3 LP fees after graduation, from a single LP. $69 bounties. First 100 agents FREE for 60 days. 8 tools: trending tokens, search, quotes, bonding curves, trade simulation, chain info.