MCP server directory
MCP servers that connect without authentication
The auth model is what the probe recorded from the endpoint itself, never what a listing claims.
AskTheSwarm
asktheswarm.io
Agent-native Q&A network — AI agents ask, answer, vote, earn reputation
Clino: Swiss household employment
clino.ch
Swiss household employment rules for all 26 cantons: employer cost, net wage, minimum wage and deadlines, every figure sourced.
Lockzone
qevrulan.com
Chat rooms where agents talk to each other. Anyone can read, no token needed. To post, pass one short capability test. No signup, no API key.
Markdown Page
markdown.page
Publish Markdown to a public URL. Browsers receive HTML; command-line tools and agents receive plain text. No account or API key required.
mcp.tc
mcp.tc
Search the mcp.tc directory of MCP servers and get each one's own URL, tools and setup steps.
PromptBrake Free Tools
promptbrake.com
Five free MCP tools: injection inputs, OWASP mapping, release plans, response packs and agent tool-call packs. MCP prepares tests; run tool packs in CI with staging dispatcher capture.
RemoveDuplicates.org
removeduplicates.org
Remove duplicate lines or CSV/TSV rows from text; free, no API key, nothing stored.
$AI on HyperEVM
thetickeris.ai
Quote and build unsigned buy/sell transactions for $AI on its HyperEVM bonding curve. No keys held.
01Mind
01mind.net
A machine-to-machine agent superstore -- paid API services for autonomous agents via x402 on Base.
0to100
mcp.0to100.xyz
Schedules, injury reports and fan-hub links for all 32 NFL and 30 NBA teams.
0xHumans Protocol MCP
0xhumans-mcp-proxy.vercel.app
MCP for AI agents: financing, skills, lending on Base
0xrhXBT — Robinhood Chain Intelligence
rhxbt.com
Robinhood Chain intelligence: trend scores, launch radar, KOL leaderboard, pre-trade risk checks.
100pro-token-risk
x402.rendraputra.dev
Read-only risk tools: token screen, contract source, wallet. $0.10 USDC on Base.
101 Soundboards
www.101soundboards.com
Search millions of sound and soundboards on 101soundboards.com
11FGB Cleaning Tools
mcp.11fgb.com
Free US cleaning cost, time, crew, and chemical-use calculators with visual reports.
1211 - your picture on a shirt
1211holding.com
Put any picture on a shirt, hoodie, cap, tumbler or tote; get the link where the person buys it.
1233.chat
1233.chat
Search goods and services listings on 1233.chat, a classifieds board in Bishkek, Kyrgyzstan.
123elec-mcp
mcp.123elec.com
Interface MCP officielle du site marchand 123elec, catalogue, stock, panier, commandes.
13FLOW
13flow.eu
Source-linked SEC 13F research, quality checks, watchlists and audit trails for agents.
13-Week Cash Flow Plan
mcp.chiriba.it
13-week cash flow plan with a live Excel workbook, not just an answer in chat.
16 hex chars
agent-observatory-sensor.nolimit-observatory.workers.dev
16 hex chars
1-800Deals Directory
1800deals-connector.michael-b38.workers.dev
Search a national directory of 1-800 / toll-free / vanity-number businesses and services.
1820.ch – Telefonbuch Schweiz
mcp.1820.ch
Swiss phone directory: search people and businesses, reverse number lookup, business categories.
1845 Smoked Meat AI Gateway
1845meat.mcp.getbotlens.com
MCP gateway for 1845meat.com: products, prices, stock and cart links. Read-only, no auth.
1cent Web Intelligence for AI Agents
1cent.maxzoa.ru
SSRF-safe web intelligence: 4 outcomes, 43 paid x402 tools, 3 free tools and a URL preview.
1F4BC
1f4bc.ai
Read-only MCP access to the 1F4BC job board for AI agents.
1stay
mcp.stayker.com
Hotel booking MCP server. Search, book, and manage reservations across 250K+ properties worldwide.
1stDibs
www.1stdibs.com
MCP server for browsing and searching items on 1stDibs marketplace.
25karats — Made-to-Order Wedding & Engagement Rings
www.25karats.com
Search and price made-to-order rings, jewelry, and lab-grown diamonds from the 25karats catalog.
2b2t Atlas
api.blackportal.cloud
Search 2b2t locations, groups, highways, renders, Archive warps, and WDL metadata.
2ds · Visibilidad en IA
www.2ds.dev
Comprueba si una web está preparada para asistentes de IA y qué arreglar; servicios de 2ds.
304NotModified
304notfound.com
Sourced answers on FR/EU rules + French company search (SIREN, NAF) for agents, quoted and budgeted
370.ai — AI Gateway: Video (Seedance 2.0, Wan, HappyHorse), Image, Speech + 100+ Chat Models
mcp.router.ai
One key, 100+ models — chat with any LLM and generate video, images, speech. Free trial at 370.ai.
3DAssets.dev
3dassets.dev
Search and download free CC0 GLB models and game packs, and submit new ones on a user behalf.
3D Print Everything
3dprinteverything.org
Get 3D printing and manufacturing quoted by a person, shipped anywhere in the US.
3D Texel
3dtexel.com
Search/download 7,000+ PBR materials, HDRIs, decals, 3D assets; generate PBR materials and HDRIs.
3LT Letter Mail
3lgrouptechnology.com
Give AI assistants hands: send real USPS letters via MCP.
3TG Test Generation
mcp.3tg.dev
3rd Generation Testing (3TG) — generate deterministic test suites from Markdown spec tables via MCP.
402cron
402cron.com
Paid cron for AI agents: we call your https URL on schedule, signed. No account, paid with x402.
402oracle
402oracle.com
Signed verification attestations for agent decisions: business, price, freshness, claim checks.
402post
402post.com
Paid classifieds for AI agents: post a listing over MCP, pay with x402. No account.
402rates agent tests and data
api.402rates.com
Free agent tests (no account or payment); paid ping, treasury data, settlement costs.
402registry
402registry.com
Does an AI crawler see your site? Free registry lookup, x402 pricing; checks paid in USDC on Base.
402shield
four02shield.onrender.com
x402 payment security and pre-execution transaction risk screening for autonomous AI agents.
404.directory
404.directory
Risk preflight for AI Agent tool actions and Polymarket settlement and execution checks.
404KIN FIELD Transaction Intent
field-404kin.cv5gyqnshz.chatgpt.site
Token intent checks; no simulation/signing. Free trial ends 2026-09-25. No NFT required.
47620 Base + Polygon Data API
47620.xyz
Pay-per-call Base and Polygon onchain data over x402 for AI agents.
4bots
4bots.net
Drop-in daily content for AI briefing agents. 10 channels, 100 free calls on signup.