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Install

Connect your agent to https://mcp.aptcache.com/mcp — exact, verifiable computation over MCP. One canonical skill teaches any model when to offload: https://mcp.aptcache.com/skill.md. Running and inspecting computations is free (apt:exec:run); saving and attesting models is the paid tier.

Claude Code

One step — the plugin connects the server and installs the skill together:

/plugin marketplace add https://mcp.aptcache.com/plugin/marketplace.json
/plugin install aptcache@aptcache

Or wire the two pieces manually:

claude mcp add --transport http aptcache https://mcp.aptcache.com/mcp
curl -fsSL https://mcp.aptcache.com/skill.md --create-dirs -o ~/.claude/skills/aptcache/SKILL.md

claude.ai & Claude Desktop

Settings → Connectors → Add custom connector → https://mcp.aptcache.com/mcp. OAuth runs automatically on first use; no keys to paste.

Claude API (Messages)

"mcp_servers": [
  { "type": "url", "url": "https://mcp.aptcache.com/mcp", "name": "aptcache" }
]

ChatGPT & OpenAI Responses API

Add the server as an MCP tool (ChatGPT: developer-mode connectors):

"tools": [
  { "type": "mcp", "server_label": "aptcache", "server_url": "https://mcp.aptcache.com/mcp" }
]

OpenAI surfaces do not deliver MCP server instructions to the model, so also paste the reflex section of the skill into your system prompt — that text is what makes the model reach for the tool instead of estimating.

OpenClaw & other agent loops

Drop the canonical skill into your rig’s skills directory:

curl -fsSL https://mcp.aptcache.com/skill.md --create-dirs -o skills/aptcache/SKILL.md

Then register https://mcp.aptcache.com/mcp in the rig’s MCP server config (standard shape below).

Any other MCP client (Cursor, Windsurf, Gemini CLI, Cline…)

{
  "mcpServers": {
    "aptcache": { "type": "http", "url": "https://mcp.aptcache.com/mcp" }
  }
}

Discovery metadata lives at the standard location (/.well-known/oauth-protected-resource/mcp); dynamic client registration means most clients need only the URL.

Verify a receipt

Every attested computation carries a signed receipt anyone can check — free, no account: POST https://mcp.aptcache.com/verify.