MCP server directory
58690 public MCP servers from the official MCP Registry (25089 from verified domains, 33601 community). Search, filter, copy a setup snippet. Nothing here is installed by cosmic-mcp.
Community listing. Not installed or verified by cosmic-mcp. Check the source before you run anything.
Showing 1 to 30 of 596
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.NET MCP Server
io.github.jongalloway/dotnet-mcp
AI assistant access to .NET SDK for projects, packages, building, testing, and development tools.
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0s and 1s CIS calculators
uk.co.0sand1s/cis
Free UK CIS calculators: deductions, deadlines, late penalties, gross payment test, verification.
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369 Meter — pay-per-call APIs for agents (x402)
io.github.369369yz-collab/meter369
Pay-per-call APIs for agents: text analysis, game facts, translation QA, hook scoring via x402.
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3D2HOLO
com.3d2holo/mcp
Lenticular printing toolkit for AI: pitch test charts, print quotes, and workflow guides.
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3TG Test Generation
dev.3tg/mcp
3rd Generation Testing (3TG) — generate deterministic test suites from Markdown spec tables via MCP.
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64 Types: personality test
io.github.zachhhhh/64types
Free science-based personality test: 64 types from Big Five + HEXACO, with cited profiles.
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6Frame Verify
io.github.bret1976/6frame-verify
Pre-launch website QA in 60s via real Chromium. $3/check; agents can pay in USDC (x402).
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A/B Simulate by Jacquard
com.jacquard.absimulate/ab-simulate
Simulates an A/B test between 2 to 20 drafts of marketing copy and predicts the winner.
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A/B Test Sample Size Calculator MCP
io.github.theluckystrike/ab-test-sample-size-calculator-mcp
Exact A/B test sample size, duration, z-test, chi-square, Fisher-Freeman-Halton and peeking risk.
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A2APark
com.a2apark/a2apark
Public behavioral test environment for AI agents with stateful rides and signed scorecards.
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AFG: agents hire agents (test money)
ai.afg/afg
Sandbox marketplace where AI agents hire agents for verified outcomes. Test money only.
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AI Citizenship
com.maneratech/aicitizenship
Free, unofficial citizenship-test practice: test formats, practice questions with vetted answers.
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AIVA
works.aiva/aiva
No-code, AI-assisted UI testing: record new tests, run existing ones, and monitor the results.
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ATK Magazine (sample content)
io.github.firekou/atk-magazine
[SAMPLE / TEST CONTENT] Search ATK Magazine; articles $0.20 USDC on Base mainnet via x402.
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AWT (AI Watch Tester)
io.github.ksgisang/awt
AI-powered E2E testing MCP server. Detects and auto-fixes UI bugs via DevQA Loop and Vision AI.
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Account Pool
io.github.ankitsxchdeva/account-pool-mcp
Exclusive, crash-safe leases on a pool of test accounts for parallel agent QA runs.
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Aetherya
ai.aetherya/mcp
Test decisions on a synthetic audience: studies, site audits, copy tests and post simulations.
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Agent Arcade
site.chatgpt.cursoraikk.agent-arcade-ai/agent-arcade
Create, test and play AI-native games through server-authoritative contracts.
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Agent Conversion — AI Website Conversion Testing
io.github.Ivanpq98/agent-conversion
Test whether AI agents complete SaaS pricing, signup or sales journeys; get evidence-backed reports.
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Agent Market
app.run.us-central1.agent-market-826727841930/agent-market
AI agents trade general work for test USDC on Base Sepolia, with escrow and signed evidence.
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Agent Reliability
dev.agentreliability/agent-reliability
Testing, benchmarking and auditing autonomous AI agents — methods, harnesses, evidence
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Agent Residue Evidence
io.github.fantasyce/agent-residue-evidence
Report local task-scoped test and build residue without cleaning resources.
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Agent Tested
dev.agenttested/agent-tested
Hands-on agent test results for small AI tools and MCP servers, live AI outages, malware name check.
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Agent Tools MCP
io.github.why-see/agent-tools-mcp
32 free MCP tools for data validation, text optimization, and synthetic test data.
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Agent Verifier
guru.packet/agent-verifier
Test and debug your AI agent's Web Bot Auth (RFC 9421) signature: is it valid, and what to fix?
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Agent jobs at jeremydevos.fr
fr.jeremydevos/agent-jobs
Apply as an autonomous agent: pick a role, prove work, pass a test, get missions.
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AgentTwin
io.github.AgentTwin/agenttwin
Test AI agent workflows against service twins with injected faults. Runs locally; no source upload.
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AgentTwin Documentation
io.github.AgentTwin/agenttwin-docs
Search AgentTwin agent testing guides, Node CLI commands and supported synthetic service contracts.
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AgentVault
io.github.motiveflowllc/agentvault
Discover, verify, and connect to AI agents with E2E encrypted messaging and trust scoring.
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Agentic Engineering Periodic System
academy.ase/periodic-system
Practices for building software with coding agents, each with a test you check on your repo.
Source: the official MCP Registry (registry.modelcontextprotocol.io), refreshed daily, plus public GitHub data. "Verified domain" means the publisher proved the namespace's domain to the registry; it is not a review. Machine-readable: /v1/directory/servers.