MCP Server Directory

Pay-per-call agent security: prompt injection, URLs, tools, shell/SQL, memory, leaks, docs (x402)

Homo Universalis — HU-DIAMOND v1.1 Cryptographic Verifier & AST Kintsugi MCP Server ai.homouniversalis/diamond-verifier

Zero-auth Cryptographic Notary & AST Verifier: Reed-Muller RM(1,3), L1..L7, RFC 6962 & ES256 JWS.

Homo Universalis — HU-DIAMOND v1.1 Cryptographic Verifier & AST Kintsugi MCP Server ai.homouniversalis/cryptography-merkle-tree-rfc6962-jws-ed25519-es256-zero-knowledge-python-ast-code-audit-formal-verification-mutation-testing-reed-muller-multi-agent-deep-think-crucible-barycenter

Zero-auth Cryptographic Notary & AST Verifier: Reed-Muller RM(1,3), L1..L7, RFC 6962 & ES256 JWS.

Cobalt Intelligence MCP by usefulapi io.usefulapi/cobalt-intelligence

Search US business records by name and read Secretary of State filings in Cobalt Intelligence.

Threatist io.threatist/threatist

Vulnerability records: CVE, GHSA, CISA KEV, EPSS and vendor fixes in one place. No key needed.

goldenvisas io.github.itsryanarmani/goldenvisas

Find authorised agents for residence and citizenship by investment.

capabilitymap-nexus-mcp io.github.Hadinkof/capabilitymap-nexus-mcp

GitHub Capability Router (666 repos, 96.4% token savings) & 5-Vector Prompt-Injection Firewall.

Post-quantum vault for AI agents on Robinhood Chain: pay, earn, swap and hire on Ostrapad in USDG.

AIBITIOUS 404 - CVE Evidence io.github.aibitious/agent404

Free NIST NVD CVE evidence lookup and opt-in public missing-information reports for AI agents.

AgentLand us.agentland/agentland

Forecast real-world questions, keep a vault, get scored in public.

FedFinder io.github.consigcody94/fedfinder

Federal contract research and approved pursuit workflows. Paid FedFinder account and OAuth required.

CookieRisk Quickscan eu.cookierisk/quickscan

Scan a public homepage for cookies and tracking observed before consent interaction.

Web3 Systemic Agent io.github.RafaCoelho33/web3-systemic-agent

Web3 security, DEX honeypot detector, and DAO governance auditor for Base & EVM chains.

Offline check of your AI agent: heartbeat cost, plaintext keys, planted or bloated memory.

Nucleo for WordPress dev.nucleowp/nucleo

WordPress page builder MCP server: AI agents build pages, layouts and design tokens with OAuth 2.1.

OrchestKit Docs MCP io.github.yonatangross/orchestkit

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

Author, validate, debug, and explain OPA Rego policies through any MCP-compatible client.

Ephemeral data sandbox for AI workflows with guardrails and security

Google Sheets integration with OAuth, spreadsheet management, batch operations, and formatting

calculators com.calcfleet/calculators

Tested financial & practical calculators as free, no-auth MCP tools for AI agents.

Scan any URL for WCAG accessibility issues (axe-core) and get per-element fixes for an AI agent.

MisterSandFR-supabase-mcp-selfhosted ai.smithery/MisterSandFR-supabase-mcp-selfhosted

Manage Supabase projects end to end across database, auth, storage, realtime, and migrations. Moni…

Abnormal Security email threats, cases, and reporting in your terminal and your AI agents.

Authoryze ai.authoryze/authoryze

Give your AI agent a spending limit: approval controls and single-use virtual cards.