MCP Server Directory

io.github.kira-autonoma/devtools

23 developer utilities — base64, JWT, UUID, hash, QR, regex, timestamps. No API keys.

Open Corporates

OpenCorporates MCP — Global company registry data (free, no auth, rate limited)

Healthdata

HealthData.gov MCP — wraps HealthData.gov CKAN API (free, no auth)

NeuroDock (hosted)

Hosted NeuroDock — stateless communication and planning tools over OAuth-secured Streamable HTTP.

SSL Checker API

SSL certificate check — validity, expiry, issuer, chain, grade. x402 micropayment.

dotrepo

Trust-aware repository facts for agents: build, test, docs, license, and security, no scraping.

Security Feeds

Security Feeds MCP.

Linear

Linear MCP — wraps the Linear GraphQL API (OAuth)

io.github.ofershap/dns

MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config

Stablecoin Yield Index (SYX) and live USDC vault APYs across Ethereum, Base, Arbitrum.

io.github.onelogin/onelogin-mcp

MCP server for OneLogin API - manage users, apps, roles, and authentication

io.github.mikerawsonnz/authenticated-mcp-agent

JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion.

Rick And Morty

Rick and Morty MCP — wraps the Rick and Morty API (free, no auth)

io.github.moooonad/mcp-google-sheets-full

Full Google Sheets MCP: 26 tools + run_sheets_script escape hatch. User OAuth, no service account.

Linear MCP (multi-workspace, PAT auth)

Multi-workspace Linear MCP — PAT auth, 57 tools + 3 prompts, substrate enforcement, drop-in.

1,451 security controls across 261 frameworks with bidirectional mapping

io.github.rog0x/dep

License check, outdated deps, security for AI agents

GRTwo Docs

Publish and share Markdown/HTML docs from AI assistants. Requires grtwo.app Pro. OAuth or API key.

io.github.chirag127/secenv-mcp

Centralized secrets manager MCP server. Generate .env files, rotate keys, sync to GitHub Actions.

CyberLens

Security scanning for websites, public repositories, and Open CLAW skills.

MCP Gateway Scan

Read-only MCP/agent-gateway readiness scanner — scores a repo across 7 security dimensions.

Auth, email, journeys, surveys, webhooks, and analytics for SaaS in one project, one API key.

org.wegtultrarich/mcp

A free, no-auth, computation-only MCP server that makes billionaire/trillionaire wealth tangible.

io.github.dulzuradev/liveauth-mcp

MCP server for LiveAuth: PoW + Lightning auth, L402 bundles, and paid MCP tool receipts.