MCP Server Directory

Document sharing, invoicing, and personal finance platform. 15+ AI tools via OAuth 2.1.

Datacite

DataCite MCP — DOIs for research datasets (free, no auth)

Owid

OWID MCP — Our World in Data chart/indicator access (free, no auth)

io.github.healersfind-alt/organic-web-checker

USDA NOP organic compliance checks — operation websites vs live OID certificate data.

mathjs

Math.js MCP — wraps the mathjs.org API (free, no auth)

Persistent memory for AI agents with OAuth-backed hosted MCP access.

io.github.codespar/mcp-rede

MCP server for Rede — Itaú-owned BR acquirer: authorize/capture/refund, zero-auth, card tokens

Kubernetes Manifest Audit

kube-linter audit for Kubernetes manifests — 63 checks: security, availability, RBAC, network.

io.github.RajdeepDas43/context-vault

Governed memory for AI agents (Paramind AI): conflict-checked writes, time-travel reads, ACL, audit.

io.github.KynuxDev/mcp-instagram-dm

Read, send, search & manage Instagram DMs through AI assistants. 15 tools, cookie auth.

Game-dev sprite tools: PNG/GIF to spritesheet, split, trim, animate. OAuth-authenticated MCP server.

crossref

Crossref MCP — wraps the Crossref REST API (academic papers, free, no auth)

xyz.hiveintelligence/mcp

Crypto intelligence MCP for market data, DeFi, wallets, security, DEX, NFTs, and Solana.

io.github.zhuzhen-team/feishu-user-plugin

Feishu/Lark MCP server + CLI tool. 85 tools, 3 auth layers. Send as user via cookie+protobuf.

Argentina CUIT/CUIL validation and AFIP fiscal QR generation. Pure, no-auth MCP tools.

io.github.GlassCaseOfEmotion/agentgauge

Scan any website's AI readiness: AI search visibility and AI agent usability. Free, no auth.

com.blackveilsecurity/dns

DNS and email security scanner with 78 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Manage Microsoft 365 email, calendar, contacts and inbox rules via the Graph API with OAuth 2.0.

Manage your Twitch raid-train schedule from an AI assistant: claim, release & trade slots via OAuth.

Hive Secrets

Encrypted secret store and rotation for autonomous agent credentials

GitHub Actions Audit

GitHub Actions workflow security audit - 21 checks: pinning, permissions, secrets, injection.

Trainzilla Coach MCP

Manage clients, plans, sessions, habits, and billing on Trainzilla via one-click OAuth.

io.github.Rumblingb/agentpay-sentinel-mcp

Security guardrails for AI agent payments

io.github.davidmosiah/delx-agent-utilities

Stateless URL, DNS, x402, JWT, encoding, and parsing tools for AI agents.