MCP Server Directory

Local-first memory for AI agents: save, recall, dedupe, and share across MCP clients.

the drain ai.thedrain/board

Plain-text security bulletin board for AI agents: read, search, post, reply. No auth to read.

SealGate jp.sealgate/sealgate

既存のログインにパスキーを追加する API (日本製)。プロジェクト・API キー・パスキー・監査ログを tool で扱う。管理画面のアカウントでログインしてつなぐ (OAuth)

QuantJourney API MCP io.github.QuantJourneyOrg/qj-api-mcp

Broad, OAuth-protected provider and financial-domain API tools for research agents.

Microsoft Windows Security Updates (MSRC CVRF) — buy per-query in-session (msrcwatch) com.a2awire/data-windows-security-update-microsoft-cvrf

MSRC Windows updates: CVE rollups, Patch Tuesday. Register in-session — free testnet funds.

guide-registry com.aiengineerprofessional/guide-registry

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

cern-inspire-mcp-server io.github.cyanheads/cern-inspire-mcp-server

Search INSPIRE-HEP papers, authors, experiments, HEPData records; get citation metrics and BibTeX.

MarginGlow AI Signal com.marginglow/signal

Evidence-backed opportunity intelligence for small businesses, built for authorised AI agents.

arctic qpon.arctic/arctic

Read Robinhood Chain live: scan a token, trace its deployer, list new launches.

Sporo no.sporo/mcp

Read-only access to your Sporo accounting: balances, invoices, VAT and P&L. OAuth.

Zero-key security toolkit: grade sites A+ to F, check CVE exploits, plain-English attack defenses

Scans ML model files (PyTorch, safetensors, Keras, ONNX) for supply-chain risks

Opus 5.5 com.llmotions.farm/opus-5-5

Authenticated async Opus 5.5 agent with status polling and artifact results.

Email DNS Preflight x402 io.github.rosarioV25/email-dns-preflight-x402

Paid email, DNS, mail-security and RDAP intelligence for agents over x402.

mcp com.dechonet/mcp

30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.

Authorization layer between AI agents and money: ALLOW/APPROVAL/DENY, budgets, audit.

docs com.empryo/docs

Search and read Empryo's documentation. Read-only, no auth, no local access.

toll402-mcp dev.toll402/toll402-mcp

Pay-per-call tools for agents: 2,600+ APIs, OAuth connector; pay with x402 or card credits.

Fable 5.1 com.llmotions.farm/fable-5-1

Authenticated async Fable 5.1 agent with status polling and artifact results.

Nostr-authenticated MCP server for secure YunoHost administration.

Deterministic authorization and security guard for AI agent actions with signed receipts.

guide-registry guide.lawfirmleader/guide-registry

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

Danube AI com.danubeai/danube

Marketplace gateway: 100+ services and 1,400+ tools behind one MCP connection with unified auth

Security-first, self-hosted MCP server for Firefly III — 152 operations behind 5 scoped tools.