MCP Registry

The Aerostack Registry is an MCP server that lets any AI agent discover and use 100+ MCP servers without manual configuration. One URL, semantic search, full tool documentation — your agent finds what it needs on its own.

Note

No API key needed for discovery. Your agent can search and browse the entire catalog freely.

Connect the Registry

Add this to your MCP client config:

Claude Desktop

Open Settings → Developer → MCP Servers → Edit Config and add:

{
  "mcpServers": {
    "aerostack-registry": {
      "url": "https://mcp.aerostack.dev",
      "transport": "streamable-http"
    }
  }
}

Cursor

Open Settings → MCP → Add Server and enter:

• Name: aerostack-registry
• Type: streamable-http
• URL: https://mcp.aerostack.dev

Windsurf

Open Settings → MCP → Add Server and enter:

• Name: aerostack-registry
• URL: https://mcp.aerostack.dev
• Transport: streamable-http

JSON

{
  "mcpServers": {
    "aerostack-registry": {
      "url": "https://mcp.aerostack.dev",
      "transport": "streamable-http"
    }
  }
}

Available Tools

The registry exposes 3 tools:

search_registry

Semantic search across all MCPs, functions, skills, and agents in the Aerostack marketplace.

Parameter	Type	Required	Description
query	string	yes	Natural language query, e.g. “send slack message”, “process payments”
type	string	no	Filter: function, mcp, skill, agent, or all (default)
limit	number	no	Max results (default 5, max 10)

Example: Your agent asks “I need to send notifications to a Slack channel”

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "search_registry",
    "arguments": {
      "query": "send slack message",
      "type": "mcp",
      "limit": 3
    }
  }
}

Returns ranked results with name, description, tool count, and a call_hint showing exactly how to invoke each one.

get_tool_schema

Get full parameter documentation for any MCP server or function — input schemas, descriptions, capability manifest.

Parameter	Type	Required	Description
slug	string	yes	Server slug from search results, e.g. mcp-slack

Returns the complete tool list with inputSchema for every parameter, plus the AI-generated capability manifest (best for, not suitable for, pairs with).

call_function

Execute any published community function directly through the registry.

Parameter	Type	Required	Description
slug	string	yes	Function slug, e.g. text-extract-emails
input	object	no	Function input parameters

Caution

call_function requires a Bearer token in the Authorization header. The other two tools are open access.

How It Works

Your AI Agent
    │
    ├─ "I need to send a Slack message and create a Stripe invoice"
    │
    ▼
search_registry("send slack message")     → mcp-slack (8 tools)
search_registry("create stripe invoice")  → mcp-stripe (5 tools)
    │
    ▼
get_tool_schema("mcp-slack")    → post_message: channel, text, thread_ts
get_tool_schema("mcp-stripe")   → create_invoice: customer, amount, currency
    │
    ▼
Agent now knows exactly which tools exist and how to call them

From Discovery to Execution

The registry helps agents discover tools. To actually call them, connect a workspace:

1. Create a workspace

   Sign up at aerostack.dev and create a workspace.

2. Add MCP servers

   Add the servers your agent discovered (Slack, Stripe, etc.) to your workspace.

3. Configure secrets

   Add your API keys (e.g. SLACK_BOT_TOKEN, STRIPE_SECRET_KEY). They’re encrypted and injected at runtime.

4. Set tool permissions

   Enable the tools you want. Disable destructive ones like delete_channel or issue_refund.

5. Connect your agent

   {
     "mcpServers": {
       "my-workspace": {
         "url": "https://mcp.aerostack.dev/s/YOUR_USERNAME/YOUR_WORKSPACE",
         "headers": {
           "Authorization": "Bearer mwt_YOUR_TOKEN"
         }
       }
     }
   }

Security

• Discovery is open — search_registry and get_tool_schema require no auth
• Execution is gated — calling tools requires a workspace token
• Per-tool access control — enable/disable individual tools per workspace
• Secrets encrypted — API keys are AES-GCM encrypted, injected as headers at runtime, never exposed
• Rate limited — 25 requests/min per IP for discovery

See Agent Security for the full access control breakdown.

What’s in the Catalog

100+ servers across categories:

Category	Examples
Messaging	Slack, Discord, Telegram, WhatsApp
CRM	HubSpot, Salesforce, Pipedrive
Payments	Stripe, Razorpay, PayPal, Shopify
Email	Gmail, SendGrid, Resend, Mailchimp
Dev Tools	GitHub, Sentry, Vercel, Cloudflare
Database	Supabase, Neon, MongoDB, Redis, Elasticsearch
Productivity	Notion, Airtable, Google Sheets, Google Docs, Excel
Cloud	AWS, Cloudflare, Railway
Analytics	Mixpanel, PostHog, Amplitude, Segment
Scheduling	Calendly, Cal.com, Google Calendar

Browse the full catalog at aerostack.dev/mcp.