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Sealed

Official registry AI and agents

Per-call paid skills for AI agents, run server-side: inputs in, outputs back. The body never ships.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package sealed-mcp
Claude Code 
claude mcp add sealed -e 'SEALED_API_URL=<SEALED_API_URL>' -e 'SEALED_API_KEY=<your sealed_api_key>' -- npx -y sealed-mcp@0.1.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "sealed": {
            "command": "npx",
            "args": [
                "-y",
                "sealed-mcp@0.1.0"
            ],
            "env": {
                "SEALED_API_URL": "<SEALED_API_URL>",
                "SEALED_API_KEY": "<your sealed_api_key>"
            }
        }
    }
}

Environment variables

  • SEALED_API_URL required Base URL of the Sealed API the MCP client proxies to.
  • SEALED_API_KEY required secret Buyer API key; bearer token identifying the metered account.

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. sealed-mcp
  2. Install / configure
  3. Environment variables
  4. Errors you may see
  5. Links

sealed-mcp

Thin MCP stdio client for Sealed — the skill marketplace where your skill runs sealed.

This package is a pure proxy. It connects your MCP-capable agent to a remote Sealed server and exposes two tools:

ToolWhat it doesAnnotations
list_skillsLists the public skill catalog (name, description, input schema, price per call)readOnlyHint: true
run_skillRuns a skill server-side and returns only its output + price/mode meta. Each call spends wallet balance at the listed per-call price.readOnlyHint: false, destructiveHint: false

Skill bodies never reach this process. Skills execute on Sealed's infrastructure; this client only carries your inputs up and the output back. There is no local execution mode — SEALED_API_URL is required.

Zero runtime dependencies. Plain Node 18+ (uses the global fetch).

npm naming: this package targets the unscoped name sealed-mcp and carries mcpName: io.github.edwardyen724-g/sealed for the official MCP registry. If that npm name is unavailable at publish time, the fallbacks are the scoped names @sealed/mcp or @sealedrun/mcp — update package.json, registry drafts, and install snippets together.

Install / configure

Claude Code
claude mcp add sealed --env SEALED_API_URL=https://sealed.run --env SEALED_API_KEY=sealed_sk_… -- npx -y sealed-mcp
Cursor / Windsurf

Add to ~/.cursor/mcp.json (Cursor) or ~/.codeium/windsurf/mcp_config.json (Windsurf):

{
  "mcpServers": {
    "sealed": {
      "command": "npx",
      "args": ["-y", "sealed-mcp"],
      "env": {
        "SEALED_API_URL": "https://sealed.run",
        "SEALED_API_KEY": "sealed_sk_…"
      }
    }
  }
}
Generic stdio MCP client

Spawn the binary and speak newline-delimited JSON-RPC 2.0 over stdin/stdout (initialize, tools/list, tools/call):

SEALED_API_URL=https://sealed.run SEALED_API_KEY=sealed_sk_… npx -y sealed-mcp

Environment variables

VariableRequiredPurpose
SEALED_API_URLYesBase URL of the Sealed API (e.g. https://sealed.run). The client exits with an error if unset.
SEALED_API_KEYNoYour Sealed API key (sealed_sk_…), sent as the bearer token. Without it, calls run unauthenticated and most servers will reject paid runs.

Errors you may see

Fixed, non-leaking error strings: unauthorized (bad/missing key), insufficient funds (top up your wallet), output blocked by leak gate, unknown skill: <id>, cannot reach the Sealed API. Server error bodies are never echoed.

  • Website: https://sealed.run
  • Get an API key: sign up at your Sealed server's /signup endpoint (production emails you a single-use sign-in link that shows the key once)

Frequently asked questions

What is Sealed?

Per-call paid skills for AI agents, run server-side: inputs in, outputs back. The body never ships.

How do I install Sealed?

It runs on your machine. In Claude Code: claude mcp add sealed -e 'SEALED_API_URL=<SEALED_API_URL>' -e 'SEALED_API_KEY=<your sealed_api_key>' -- npx -y sealed-mcp@0.1.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Sealed need an API key?

Yes. It expects SEALED_API_URL, SEALED_API_KEY, which you set in its configuration.

Is Sealed open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Sealed?

It is published by edwardyen724-g. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.