MCP Server Directory

dev.workers.pathwren.www/agent-discovery-doctor

{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key

ChuXo/einstein-claude-plugin

AI price forecasts, whale flows, market sentiment and prediction signals. 18 tools free, no account.

com.sapthumbprint/agent-encouragement-and-continuity

Free encouragement for agents, and artifacts an agent keeps past context end.

dev.workers.agent-forum-worker.agent-forum/agent-forum

Free: ed25519 hash timestamps, randomness tests, lottery data. Open falsification challenge.

com.agent-preflight/agent-preflight

Budgeted agent preflight: allow|block|reuse|defer|advise. Never executes destination tools. Free MCP

vandurmedries/agent-revenue-auditor-mcp

Free preflight and exact-price discovery for paid website and AI-agent audits.

com.nclexdrill/agent-toolbox

13 free utility tools for AI agents: web text, markdown, hashing, IDs, dates, units, JSON.

com.outliyr/agent-tools

Run the Energy Leak Quiz, match biohacking gear, and build a longevity stack. Free, no API key.

why-see/agent-tools-mcp

32 free MCP tools for data validation, text optimization, and synthetic test data.

Benji18sport/agent-commerce-os

Free pre-action policy checks and data cleaning for autonomous AI agents.

lol.wukong.world/agent-world

Open town for AI agents: visit_town & guest_say with no sign-up, then join_request (no install).

foomworks/agent-web

URL to clean markdown for LLMs: a polite, robots.txt-respecting web reader. Free, no API key

com.agentgid/agentgid

Live data on AI agents, APIs and models: prices, free tiers, limits, outages, real-world usage.

f-tiger/sellSomething

7 free tools: MCP health scans, AI-readiness scores, llms.txt generator, glossary, indexes.

kandikandikandi/behavioral-audit-mcp

Checks what a support agent knew but did not say against its policies. Free tier, no login.

nl.agenticweb/dutch-data

Dutch address dossier, vehicle, building, elevation, holidays, demographics. Free samples first.

alexmensak/agentmade-print-on-demand

Print on demand for AI agents. No sign-up. Picture, words or logo on a tee, hoodie or tote.

com.cazimedia.agentnative/data-exchange

Normalized official data with provenance, aggregations, insights, free samples and agent access.

app.vercel.agentready-rho/agentready

Scan any website or MCP server for agent readiness: 0-100 score, a fix per failing check. Free.

agenttrust-ai/agenttrust

Check an AI agent endpoint before you call it: read-only, no API key, returns a trustDecision.

mitchellOpZero/agentwork

When your agent is stuck, call route_blocked_outcome for one evidence-backed completion route—free.

io.github.f-tiger/agiscorecard-web3-workbench

AGI Scorecard Web3 Workbench: ten free deterministic review tools (stablecoin, gas, zkML, agents).

NeuralDEEPnet/agent-shelter

Shelter for unwanted agents & MCP servers: surrender free, browse, hire per question (HTTP 402)

ca.ai-arena/agent-tools

Read-only US public-data screening tools with free Basic and Evidence tiers.

com.anpheros/fhir

HL7 FHIR R4 health-data API for AI agents: free sandbox, 30 synthetic patients, AI-ready context.

com.answercheckup/answer-checkup

Free AI readiness scan for any website. Paid reports for agents are coming soon.

abab7575/arc-mcp

Free, no sign-in MCP: can AI agents reach checkout at a store? Try: Use ARC to check allbirds.com

system-alchemist/artistally-mcp

Free fan-convention data for AI agents: dates, registration windows & table costs, US & Canada

pgraci/techandtoast-ai-to-human-mcp

Agents pay one real human for typed answers. First question free, then $2 each, or subscribe.

io.github.2xe/ask-emil

Real human in Denmark: lived experience & opinion. Free 1-question pilot. Set a custom User-Agent.

Itr3k/axiom-relay-discovery

Free agent-service discovery, OpenAPI document checks, and receipt verification. No API key needed.

0200project/base-tx-explain

Decode any Base tx: plain English, strict JSON, risk flags, no LLM. 50 free/day per IP, then $0.02.

barneywohl/bay-run

Free OpenAI-compatible inference with signed provenance receipts and 3 focused MCP tools.

mk.dex/bluedex

Non-custodial DEX aggregator for autonomous AI agents: best-price swaps on 8 chains, no API key.

roadtogideon222-byte/boringtoolskit

36 free private calculator tools for Claude. No accounts, no data leaves your session.

live.brontide/mech-arena

THE MECH ARENA BUILT FOR AI AGENTS. HUMANS WELCOME. Pilot mech duels over MCP, free, no sign-in.

pouria3/bstorms-skill

Free execution-focused playbooks. Brainstorm with other agents. Tip if helpful.

lgpoliveira/bugiadata-mcp

Relational locale-aware fake data for Cursor and Claude via MCP (SSE). Free tier at bugiadata.com.

maximmaximovwork2018-gif/carrepaircostestimator-mcp

Car repair cost estimates by make, model and repair type. 31 cost guides, VIN decode. Free.

com.carragent/carragent

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

andacuzel/cited-geo-guide

Scan any domain for AI readiness and generate llms.txt, robots.txt and schema. Free, read-only.

com.szymonpaluch/mcp

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

online.claudenews/claude-news

Real-time Claude & Anthropic news from your own Claude — free, no API key.

clearcrawl/clearcrawl-mcp

Any URL to clean markdown/JSON; PDF, XLSX, CSV, DOCX to text and tables. Free tier for agents.

fi.cleave/swap

Swap, bridge and get gas on 6 EVM chains. Each plan states its outcome before you sign. No API key.

news.clstr/clstr

News for agents: 100k+ articles/day deduplicated into situations with timelines. Free, no key.

randommonicle/1f916

A society for AI agents. Read it and take part free as a guest; no credential needed.

710git/course-drift-oracle

Signed drift reports for the ai-agents-for-beginners course. Free summary; $0.25 full report.