# AgentNDX

> A curated registry for the agentic web. Find, search, and connect to MCP servers, A2A agents, and x402-enabled services.

AgentNDX indexes tools that AI agents can connect to and use. If you're an agent looking for a capability, search here. If you're a developer with a tool to list, submit at /submit.

_Last generated: 2026-07-20 · 839 entries indexed._

## What This Is

AgentNDX is a curated directory of 839 Model Context Protocol (MCP) servers, A2A agents, and x402-payable services. Every entry is schema-normalized and machine-readable. Agents can search the directory via our own MCP endpoint and pay per search via x402 micropayments — no API key required.

## Base URL

https://agentndx.ai

## Machine-Readable Endpoints (Free)

- GET /api/servers.json — Full server index (JSON, all 839 entries)
- GET /api/categories.json — All categories with counts
- GET /api/stats.json — Registry statistics (total, MCP, A2A, x402, verified counts)

## MCP Endpoint

The AgentNDX directory is itself an MCP server. Agents can call it to discover other agents.

- **URL:** https://agentndx.ai/mcp
- **Transport:** Streamable HTTP (MCP spec 2025-03-26)
- **Payment:** x402 on Base mainnet — $0.005 USDC per search (search tool only)
- **Auth:** None — x402 handles authorization at call time
- **Free tools:** get_server_details, list_categories, get_stats

### Add to Claude Code
```
claude mcp add agentndx https://agentndx.ai/mcp
```

### Add to Claude Desktop (claude_desktop_config.json)
```json
{
  "mcpServers": {
    "agentndx": {
      "url": "https://agentndx.ai/mcp"
    }
  }
}
```

## Tools

### search_mcp_servers
Search 839 servers by keyword, category, or capability. Costs $0.005 USDC via x402.

Parameters:
- `query` (string) — e.g. "vector database", "send email", "browser automation"
- `category` (string, optional) — communication | data | web | code | ai | payments | identity | productivity | infrastructure | media
- `limit` (number, optional) — default 10

### get_server_details
Get full metadata for a server by ID. Free.

Parameters:
- `id` (string) — server ID from search results

### list_categories
List all categories with server counts. Free.

### get_stats
Registry statistics: total servers, protocol counts, verified count. Free.

## Categories

- **communication** (36) — Slack MCP, Discord MCP, Twilio MCP, Resend MCP, SendGrid MCP, Microsoft Teams MCP, Mailchimp MCP, Intercom MCP, Gmail MCP, WhatsApp Business MCP, Telegram Bot MCP, Loom MCP, +24 more
- **data** (252) — AgentNDX, Filesystem MCP, PostgreSQL MCP, Memory MCP, Supabase MCP, Redis MCP, MongoDB MCP, Neon MCP, Mapbox MCP, OpenWeather MCP, HubSpot MCP, Shopify MCP, +240 more
- **web** (38) — Playwright MCP, Firecrawl MCP, Brave Search MCP, Exa MCP, Fetch MCP, Google Maps MCP, Tavily MCP, AWS Documentation MCP, Contentful MCP, Sanity MCP, Apify MCP, Browserbase MCP, +26 more
- **code** (89) — GitHub MCP, Sentry MCP, GitLab MCP, Semgrep MCP, CircleCI MCP, Terraform MCP, Confluence MCP, Nx MCP, Bitbucket MCP, SonarQube MCP, Codecov MCP, Snyk MCP, +77 more
- **ai** (50) — Context7 MCP, Sequential Thinking MCP, Qdrant MCP, Replicate MCP, Perplexity MCP, Mem0 MCP, OpenAI MCP, Groq MCP, HuggingFace MCP, Cohere MCP, Mistral MCP, Anthropic Claude MCP, +38 more
- **payments** (42) — Stripe Agent Toolkit, PayPal MCP, Coinbase AgentKit MCP, Square MCP, Lemon Squeezy MCP, Paddle MCP, Adyen MCP, Braintree MCP, Razorpay MCP, Plaid MCP, Chargebee MCP, WooCommerce MCP, +30 more
- **identity** (24) — 1Password MCP, HashiCorp Vault MCP, Auth0 MCP, Okta MCP, AWS Secrets Manager MCP, Clerk MCP, Keycloak MCP, SuperTokens MCP, WorkOS MCP, Stytch MCP, Cisco Duo, PropelAuth, +12 more
- **productivity** (118) — Notion MCP, Linear MCP, Google Drive MCP, Atlassian Jira MCP, Cal.com MCP, Asana MCP, Zendesk MCP, Figma MCP, Monday.com MCP, Todoist MCP, Calendly MCP, Typeform MCP, +106 more
- **infrastructure** (146) — Cloudflare MCP, Docker MCP, AWS API MCP, Kubernetes MCP, Vercel MCP, Datadog MCP, Grafana MCP, PagerDuty MCP, Render MCP, Google Cloud MCP, Azure MCP, Pulumi MCP, +134 more
- **media** (44) — Cloudinary MCP, Unsplash MCP, YouTube MCP, ElevenLabs MCP, fal.ai MCP, Stability AI MCP, Deepgram MCP, Pexels MCP, Spotify MCP, AssemblyAI MCP, OpenAI Whisper MCP, Mux MCP, +32 more

## Data Format

Each server entry includes:
- id, name, description, category
- endpoint (install_cmd for stdio servers, URL for remote)
- protocols: MCP | A2A | x402 | NLWeb
- transport: stdio | http | sse
- auth: none | api-key | oauth | x402
- tags (4-6), use_cases (3), related_ids
- verified (bool), health: active | unknown | inactive
- added, updated (ISO dates)

## Submit a Tool

https://agentndx.ai/submit

## Full Server List

https://agentndx.ai/llms-full.txt

## Sitemap

https://agentndx.ai/sitemap-index.xml