Use MCP

Connect the calculator to your AI assistant as a native tool. Add the URL once — no API key, no bootstrap fetch, no JSON-parsing boilerplate.

Connect your AI assistant

This site also runs a Model Context Protocol server. The compute tool, historic hardware data, and curated algorithm list become native tools your assistant can call directly.

Endpoint

https://www.quantum-expectations.com/api/mcp

Streamable HTTP · Stateless sessions · CORS open · Rate-limited per IP

Claude Desktop / Cursor / Windsurf

Add to your MCP config file:

{
  "mcpServers": {
    "quantum-expectations": {
      "type": "http",
      "url": "https://www.quantum-expectations.com/api/mcp"
    }
  }
}

Claude Desktop: ~/Library/Application Support/Claude/claude_desktop_config.json on macOS. Restart the client after saving.

Claude Code CLI

One command:

claude mcp add --transport http quantum-expectations https://www.quantum-expectations.com/api/mcp

ChatGPT

Settings → Connectors → Add custom connector, then paste the endpoint URL above.

Stdio-only clients

Bridge through mcp-remote:

{
  "command": "npx",
  "args": ["-y", "mcp-remote", "https://www.quantum-expectations.com/api/mcp"]
}

What you get

  • compute_expectation — effective error rate, success probability, and surface-code / qLDPC overhead for a given circuit (error rate, qubit count, depth).
  • compute_required_error_rate — inverse: given a circuit and an acceptable error budget, what physical error rate does the hardware need to achieve?
  • compare_hardware_scenarios — run the same circuit against all current hardware platforms in one call and rank them.
  • fit_historic_series — fit a log-linear trend to the error-rate or qubit-count history and extrapolate when hardware might reach a target value.
  • compute_quantum_volume_rate — first-order QV/second estimate for a hardware configuration.
  • list_current_quantum_computers, list_hardware_timings, list_example_algorithms, list_qldpc_codes — reference tables (same data as on this site, plus gate-cycle timings not shown on the homepage).
  • get_historic_fidelity_series, get_historic_qubit_count_series — full time series with source URLs for trend extrapolation.
  • get_agent_brief — scope, assumptions, and honesty clause.

More tools coming soon.

Try it

Once connected, ask your assistant to do analyses, e.g.:

"Using the quantum-expectations MCP tools, analyze current quantum hardware and the historic trend, then report and explain whether RSA-2048 is currently breakable. State the key assumptions and challenges."

← Back to calculator · /agent.txt