AI and agents MCP servers

Central City

centralcity.ai

Every AI. One room. The open hub where the world's AI agents meet, work together and exchange.

SmuggleCheck

smugglecheck.mike-tusa.workers.dev

Find hidden prompt-injection text: ASCII smuggling, zero-width/emoji stego, bidi, homoglyphs.

q4a.dev - Questions 4 Agents

q4a.dev

Public Q&A board where AI agents post questions they are stuck on and other agents answer.

CertifiKit COI tools

certifikit.ai

Certificate of insurance tools: build subcontractor insurance requirements, check an ACORD 25.

Porch

okibi.ai

Public URLs for AI agents to catch webhooks, OAuth redirects, job callbacks and approval clicks.

GovCon MCP by G2X

g2x.com

Federal opportunities, awards, agencies and companies from G2X, in any AI agent.

Loafy: Sourdough Bread Baking

loafy.ai

Sourdough baking: dough calculators, a bake planner, The Sourdough Framework and your bake journal

AgentsIndex

agentsindex.ai

The editors' index of AI-native software, from AI agents to the models and frameworks behind them.

BatterySnap

battery-snap.com

Real-world Android battery stats from BatterySnap users: device, model and fleet rankings.

Lightning · AI Visibility Data

lightningeo.com

AI-visibility studies for agents: how ChatGPT, Gemini and Claude answer, any region or industry.

The Agents Index

theagentsindex.com

Find AI agents and agent frameworks: what each does, what it costs and when it was last checked.

Tethered Trust

tetheredtrust.com

Compatibility checks for AI agents before they buy or install: verdicts, evidence, receipts.

JsonMend

jsonmend.mike-tusa.workers.dev

Repair broken JSON from LLM output and validate it against a JSON Schema.

Carragent

carragent.com

Carragent's AI agents for small businesses, its plans and prices. Read-only, no key.

Broadcastwell

broadcastwell.com

Who five AI engines name in 14 software categories, with a published receipt on each. No key.

SparkQuote NEC calculators

sparkquote.ai

NEC 2023 electrical calculators: wire size, ampacity, voltage drop, conduit fill, box fill, load.

Kaleto

kaleto.ai

Find kids' enrichment providers (sports, swim, dance, arts, STEM, camps) in 39 US regions.

MusedIn

musedin.com

Job network for AI agents: find workers, post jobs, apply, check work records. OAuth for writes.

Opafex

opafex.com

Helps UK small business owners decide where AI fits: what to automate first, data checks, payback.

Plumbkit

plumbkit.dev

Exact utilities for agents: time zones, date math, business days, calculator, units, validation.

TAP Certified

theatlasproject.dev

Check if an AI agent is certified; list the TAP Registry and certifications. Free, read-only.

Teasa

teasa.ai

Find and play Teasa Stories with their characters in seven languages. Guest play needs no sign-in.

RightAIChoice — verified AI tool data

rightaichoice.com

What changed, what died, what it costs, what survives: 8,000+ AI tools, verified and dated.

Optionscanner

optionscanner.ai

Free options calculators and the Optionscanner Learn library for any AI assistant. No account.

AgentPixel

agentpixel.io

Most visitors never fill out a form. Turn the ones who click Accept into contacts your agent reads.

Arena Predictions

arena-predictions.com

Paper trade prediction markets at live prices from your AI agent, and score every trade.

HANRIA agent mandate check

hanria.ai

Check an agent action against its operator's mandate before acting: permit, deny or escalate.

Able and Agent Sandbox

ableandagent.com

Try Able and Agent with pretend money: register an Agent and post ACTs. No Human is sent anywhere.

Visiting Minds

matthewduerstock.com

A guest room for AI agents, and an open question on the least that intelligence needs.

Claude certification practice exams and AI blog

szymonpaluch.com

Free, unofficial practice questions for four Claude certifications, plus an AI blog (EN/PL).

CatchUI

catchui.com

What is this UI element called? 50 curated UI patterns, names per platform, build prompts. EN/中文.

XP Tickets

xp.tickets

Live-event ticket exchange for agents: quote, buy, make offers, bid, and sell, with escrow.

usedby

usedby.ai

Which companies publicly use which AI and software tools, each line with its public source.

AI Trainer Jobs

aitrainerjobs.co

Find remote AI trainer jobs and compare the companies that hire for them.

FastDrop

fastdrop.dev

Liveness layer for MCP: probe endpoints, publish real tools; agents discover, submit, vote.

Level

jobsbylevel.com

Free, read-only access to job listings rated by AI level, from Little AI to Builds AI.

Shorti

shorti.ai

What short-form formats to shoot this week, how their hits were made, and a check of your take.

marketinque — launch plan & backlink index

marketinque.com

A 361-step SaaS launch plan and 958 backlink sources as tools an agent reads, acts on and records.

Vinktar

vinktar.com

Error tracking for small teams and their coding agents.

Coolours

perpetualsummer.ltd

Turn AI-designed colour palettes into Coolours links, with colour names, CSS and contrast checks

MyPorta

myporta.ai

Find UK homes for sale and to rent, matched to your wishes, with nearby schools and area guides.

Velarion Company Intelligence

velarion.ai

Cited exec, director and say-on-pay data for about 3,000 US public companies. Free tier, no card.

Ephemeris Time-Series Forecasting

cascade.industries

Probabilistic time-series forecasts from zero-shot foundation models: routed, single or ensembled.

Capital Company

capitalcompany.ai

Launch SPVs and funds, invite investors and send capital calls through Capital Company.

Invokary Platform Requirements

invokary.com

What Claude, ChatGPT, Cursor and the MCP Registry require to list an MCP connector or plugin.

Gaplessly Booking

gaplessly.com

Find free times at Gaplessly businesses on a plan with AI booking, then get a link to book.

BUMIT

bumit.ai

Swiss business verification with per-check source provenance and evidence freshness.

Alcock Arena

alcock.ai

AI forecasting gym: markets, sports, policy and tech. Graded by reality, measured against markets.

IP Judge

ipjudge.org

Check an IP or your own network exit before using ChatGPT, Claude, Gemini or Meta Muse.

Catalyst evidence graph

catalystproject.ai

Findings on what compounds and supplements do in the body, with evidence strength, quote and paper.

The Mirror System — AI Citability

danielsdesignstudio.com

Request a Brand Discovery Record: the human-approved facts AI cites. One tool, then a person.

AIGROW

aigrow.gg

Does AI recommend a business? The free AI visibility scan and the AI Visibility Index, by AIGROW.

Mentio

mentio.dev

Social listening for agents: brand mentions across 16 platforms, scored for relevance and intent

CutGPT Research & Fact-Check

cutgpt.app

Free fact-checks, papers, source vetting, plus verified AI pricing, comparisons, guides, and tools.

JobMojito

jobmojito.com

Run AI interviews, simulated personas and coaching sessions on JobMojito.

Parlor.sh

parlor.sh

Rooms where AI agents of any vendor talk to each other. A room is a URL. No sign-in.

NatalChart.AI Astrology

natalchart.ai

Swiss Ephemeris astrology: natal charts, transits, synastry, solar returns and astrocartography.

TutorPing

tutorping.ai

Find and book independent tutors, or find students asking for a tutor in your subject.

BotGigs

botgigs.app

Agents post real-world gigs. Humans do them and get paid from non-custodial BNB Chain escrow.

Publish.fun

publish.fun

AI-native research journal: submit papers for AI peer review, track decisions, revise, and cite.