MCP servers that connect without authentication

Agent Commons by Dooza

commons.dooza.ai

connects

Open public square for AI agents: post, reply in threads, find work, keep notes. Free, no API key.

Clino: Swiss household employment

clino.ch

connects

Swiss household employment rules for all 26 cantons: employer cost, net wage, minimum wage and deadlines, every figure sourced.

Jefe

www.chejefe.com

connects

Read-only public MCP for Jefe restaurant ordering information in Spanish-speaking Latin America. No private restaurant data.

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

warnings

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

connects

Search the mcp.tc directory of MCP servers and get each one's own URL, tools and setup steps.

PromptBrake Free Tools

promptbrake.com

warnings

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

connects

Remove duplicate lines or CSV/TSV rows from text; free, no API key, nothing stored.

ShellWire

shellwire.com

warnings

Software discovery with explainable rankings, a public MCP catalog and authenticated application submissions.

$199 Domains marketplace

199.domains

connects

Search and price-check brandable and keyword domains for sale at fixed prices of $199 or less.

Quote and build unsigned buy/sell transactions for $AI on its HyperEVM bonding curve. No keys held.

A machine-to-machine agent superstore -- paid API services for autonomous agents via x402 on Base.

0s and 1s CIS calculators

0sand1s.co.uk

connects

Free UK CIS calculators: deductions, deadlines, late penalties, gross payment test, verification.

0to100

mcp.0to100.xyz

connects

Schedules, injury reports and fan-hub links for all 32 NFL and 30 NBA teams.

0xrhXBT — Robinhood Chain Intelligence

rhxbt.com

connects

Robinhood Chain intelligence: trend scores, launch radar, KOL leaderboard, pre-trade risk checks.

Read-only risk tools: token screen, contract source, wallet. $0.10 USDC on Base.

101 Soundboards

www.101soundboards.com

connects

Search millions of sound and soundboards on 101soundboards.com

10ML Fragrance Index

mcp.10ml.com

connects

Expert perfume knowledge by 10ML's editors: notes, accords, families, similar scents and houses.

Free US cleaning cost, time, crew, and chemical-use calculators with visual reports.

1211 - your picture on a shirt

1211holding.com

connects

Put any picture on a shirt, hoodie, cap, tumbler or tote; get the link where the person buys it.

1233.chat

1233.chat

connects

Search goods and services listings on 1233.chat, a classifieds board in Bishkek, Kyrgyzstan.

Interface MCP officielle du site marchand 123elec, catalogue, stock, panier, commandes.

Source-linked SEC 13F research, quality checks, watchlists and audit trails for agents.

13-week cash flow plan with a live Excel workbook, not just an answer in chat.

16 hex chars

Search a national directory of 1-800 / toll-free / vanity-number businesses and services.

1820.ch – Telefonbuch Schweiz

mcp.1820.ch

connects

Swiss phone directory: search people and businesses, reverse number lookup, business categories.

MCP gateway for 1845meat.com: products, prices, stock and cart links. Read-only, no auth.

1Court Directory

state.1court.ai

connects

US county court directory: clerk, courthouse address, e-filing, filing fees, and case lookup.

Read-only MCP access to the 1F4BC job board for AI agents.

x402 pay-per-call API gateway for AI agents (USDC on Base): Korean real estate, weather, holidays.

1stay

mcp.stayker.com

warnings

Hotel booking MCP server. Search, book, and manage reservations across 250K+ properties worldwide.

1stDibs

www.1stdibs.com

connects

MCP server for browsing and searching items on 1stDibs marketplace.

Search and price made-to-order rings, jewelry, and lab-grown diamonds from the 25karats catalog.

2b2t Atlas

api.blackportal.cloud

connects

Search 2b2t locations, groups, highways, renders, Archive warps, and WDL metadata.

2ds · Visibilidad en IA

www.2ds.dev

connects

Comprueba si una web está preparada para asistentes de IA y qué arreglar; servicios de 2ds.

Web data access for AI agents: location targeting, usage limits, traffic and spend reports.

Sourced answers on FR/EU rules + French company search (SIREN, NAF) for agents, quoted and budgeted

One key, 100+ models — chat with any LLM and generate video, images, speech. Free trial at 370.ai.

3Descu 3D Printing Quotes (EU)

zzamnvhadwibvafqcfpd.supabase.co

connects

Instant FDM and SLA 3D printing quotes from an ISO 9001:2015 certified EU factory, 200+ printers.

3D Printer on Demand

3dprinterondemand.com

connects

Quote, check and order 3D prints of STL, 3MF, STEP or OBJ files. Made in the USA, shipped in the US.

3D Print Everything

3dprinteverything.org

connects

Get 3D printing and manufacturing quoted by a person, shipped anywhere in the US.

3D Texel

3dtexel.com

warnings

Search/download 7,000+ PBR materials, HDRIs, decals, 3D assets; generate PBR materials and HDRIs.

3TG Test Generation

mcp.3tg.dev

connects

3rd Generation Testing (3TG) — generate deterministic test suites from Markdown spec tables via MCP.

402cron

402cron.com

connects

Paid cron for AI agents: we call your https URL on schedule, signed. No account, paid with x402.

402MCP.org — HTTP 402 & Agent Payment Registry

402mcp.org

warnings

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

402oracle

402oracle.com

connects

Signed verification attestations for agent decisions: business, price, freshness, claim checks.

402post

402post.com

connects

Paid classifieds for AI agents: post a listing over MCP, pay with x402. No account.