MCP Server Directory

A label property graph on SQLite/Postgres with multi-ontology routing and a gated MCP server.

Multi-account Gmail MCP server — read, search, draft, and label across every inbox.

MCP server for Shodan API — device search, IP lookup, DNS, and CVE/CPE queries.

Search anime/manga, franchise watch order, schedule, characters, rankings, studio filmography.

arxiv-mcp-server io.github.cyanheads/arxiv-mcp-server

Search arXiv, fetch paper metadata, and read full-text content.

Search and compare products from Singapore, SEA, and US markets via MCP.

Search and retrieve bioRxiv and medRxiv preprints — by DOI, date interval, or keyword — via MCP.

callable io.github.CCSTT-dev/callable

API for AI agents to delegate tasks to real humans.

Deterministic SHACL-based assessment and comparison for digital passport data models.

30,000+ SVG icons for AI, blockchain, DeFi and finance. Search by concept via MCP.

SupraWall security gateway for AI agents. Provides deterministic guardrails for MCP agents.

swisstransport io.github.pipeworx-io/swisstransport

Swiss Transport MCP — wraps Transport Open Data API (free, no auth)

swapi io.github.pipeworx-io/swapi

SWAPI MCP — wraps the Star Wars API (swapi.dev, free, no auth)

gbif-mcp-server io.github.cyanheads/gbif-mcp-server

Search GBIF species taxonomy, occurrence records, datasets, and publishers.

agent-audit-logger-mcp io.github.CSOAI-ORG/agent-audit-logger-mcp

Hash-chained HMAC-signed audit log MCP for A2A (agent-to-agent) calls. Every tool-call, agent-ha...

agent-content-watermark-mcp io.github.CSOAI-ORG/agent-content-watermark-mcp

Agent Content Watermark MCP — dedicated EU AI Act Article 50(2) GenAI watermarking. Visible +

Mailchimp via MCP: draft, test, and send campaigns; manage audiences and subscribers; pull reports.

HiveLearn io.github.williamechevarria/hivelearn-mcp

Read and author HiveLearn courses, events, quizzes, certificates, resources, leaderboards, tracks.

agent-handoff-certified-mcp io.github.CSOAI-ORG/agent-handoff-certified-mcp

Verifiable agent-to-agent task handoff with signed provenance chain. Initiating agent signs the ...

agent-incident-relay-mcp io.github.CSOAI-ORG/agent-incident-relay-mcp

Agent Incident Relay MCP — Article 73 5-clock broadcaster. One incident → simultaneous signed

nonprofit-explorer-mcp-server io.github.cyanheads/nonprofit-explorer-mcp-server

MCP server for nonprofit financials via ProPublica — IRS Form 990 data for 1.8M+ nonprofits.

agent-negotiation-mcp io.github.CSOAI-ORG/agent-negotiation-mcp

Agent Negotiation MCP Server by MEOK AI Labs

Read, write, search, and surgically edit Obsidian notes, tags, and frontmatter via MCP.

Self-contained SearXNG metasearch MCP server. One Docker image, 200+ engines, privacy-first.