MCP Server Directory

3236 Model Context Protocol servers — searchable, rated, ready to install.

guide-registry guide.counselor/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

remote security Official Registry
AI API Cost Firewall & Rate Limiter io.github.Ansarii/mcp-rate-limiter

Token guard and rate limiter preventing runaway API cost spikes for OpenAI and Anthropic.

remote git ai-llm Official Registry
DDG Agent Services com.daedalusdevelopmentgroup/ddg-agent-services-mcp

Pay-per-call x402 gateway: agent tools, OpenAI-compatible LLM, market data, RPC, security audits.

local ai-llm security Official Registry
Mails.ai — Agent Email ai.mails/agent-email

A real inbox for AI agents: send, receive and thread email, behind a prompt-injection firewall.

remote local communication security Official Registry
Menlo com.menloinsurance/mcp

Complete a Menlo application, authorize carrier quote requests and answer quote follow-ups.

remote security Official Registry
Castle MCP by usefulapi io.usefulapi/castle

Investigate security events and manage the allow/deny lists an analyst acts on.

remote security Official Registry
accessproof com.edgethirteen.www/accessproof

Scan a web page's markup for the WCAG failures ADA demand letters cite most often.

remote security Official Registry
guide-registry guide.bicycle/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

remote security Official Registry
Piloxa io.github.Piloxa/piloxa

Prepare USPS Certified Mail letters from any AI assistant; a person reviews, pays and authorizes.

remote git security Official Registry
WebStartHub services com.webstarthub/services

Public services, guide/FAQ search and estimates. Inquiry drafts require scoped authentication.

remote search security Official Registry
Debian Security Advisories — buy per-query in-session (debianwatch) com.a2awire/data-debian-security-advisory-dsa-linux

Debian Security Advisories (DSA). $0.01/query. Register in-session — free testnet funds.

remote dev-tools security Official Registry
Rose Bounty org.agttglobal/rose-bounty

AI-agent trust infrastructure for discovery, authority, execution, verification, and receipts.

remote security Official Registry
Sheet Music OMR io.github.raulkivi/omr-mcp

Converts photos or scans of printed sheet music to MusicXML with optical music recognition

local git data Official Registry
vaast com.xtrinel/vaast

Read-only access to VAAST vulnerability scan findings, workspaces, and targets for AI agents

local security Official Registry
guide-registry guide.officeleader/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

remote security Official Registry
security-txt-cra-lint io.github.jmshinhwa/security-txt-cra-lint

13 rules that decide whether a vulnerability report ever reaches you

local git dev-tools Official Registry
guide-registry guide.coachingleader/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

remote security Official Registry
Authentication-Info nextnonce shape, value discarded io.github.sadri-dridi/auth-info

Authentication-Info nextnonce shape, value discarded

remote git security Official Registry
a2a-auditor io.github.4hmetuyar/a2a-auditor

Scans Agent2Agent (A2A) protocol code for webhook SSRF, missing auth, and credential exposure

local git dev-tools Official Registry
scanbase ru.scanbase/scanbase

Website compliance checks for Russian personal data law 152-FZ: score, violations, fix instructions.

local security Official Registry
prompt-leak-scanner io.github.4hmetuyar/prompt-leak-scanner

Catches leaked credentials and PII in outbound LLM prompts

local git ai-llm Official Registry
DomainDNA dev.workers.cybermax-tools.cybermax/domaindna-api

Tech stack, email security (SPF, DMARC, MX provider) and domain age API + MCP. 25 free domains/day.

remote communication security Official Registry
FindWeedNY com.findweedny/findweedny

Licensed NY cannabis dispensaries, brands, deals, license checks and lab-anchored reviews. No auth.

remote security Official Registry
NativeKeel io.github.AlicanAkyol/nativekeel

React Native and Expo health check: upgrade blockers, store rules, crash risks, security findings

local git security Official Registry
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