Empirica MCP Server

AI measurement and calibration tools via Model Context Protocol.

Exposes Empirica's tool surface to Claude Desktop, IDEs, and any MCP-compatible environment (Cursor, Gemini CLI, Codex, etc.). Track what AI knows, gate what it does, and compound learning across sessions — without needing Claude Code or Bash access.

Tool surface (70 tools as of 1.11.2) covers session lifecycle, the epistemic transaction loop, artifact logging, goals, project search, calibration, lessons, sync, entity registry, and (added 2026-06-03) the mesh primitives: practice_context (Ambassador addressbook), commit_context (temporal trail), listener_on/arm/off (listener facade), loop_* (adaptive scheduler), notify_emit (multi-backend dispatcher), mailbox_reply (atomic propose+complete), mesh_status (mesh health). Run empirica mcp-list-tools to see the live registry against your installed package.

PyPI Python License

Installation

pip install empirica-mcp

Note: The MCP server requires the full Empirica package for stateful operations:

pip install empirica  # Recommended - includes empirica-mcp

Verify Installation

empirica --version      # CLI
empirica-mcp --help     # MCP server

Quick Start

1. Standard Mode

empirica-mcp

Works as a standard MCP tool provider. No epistemic layer.

2. Epistemic Mode

export EMPIRICA_EPISTEMIC_MODE=true
empirica-mcp

Every tool call now includes epistemic self-awareness - the server maintains vector state and routes behavior based on confidence/uncertainty.

3. Personality Profiles

# Cautious (investigates early)
export EMPIRICA_PERSONALITY=cautious_researcher

# Pragmatic (action-oriented)
export EMPIRICA_PERSONALITY=pragmatic_implementer

# Balanced (default)
export EMPIRICA_PERSONALITY=balanced_architect

# Adaptive (learns over time)
export EMPIRICA_PERSONALITY=adaptive_learner

Claude Desktop Configuration

Standard Mode

{
  "mcpServers": {
    "empirica": {
      "command": "empirica-mcp"
    }
  }
}

Epistemic Mode

{
  "mcpServers": {
    "empirica-epistemic": {
      "command": "bash",
      "args": [
        "-c",
        "EMPIRICA_EPISTEMIC_MODE=true EMPIRICA_PERSONALITY=balanced_architect empirica-mcp"
      ]
    }
  }
}

After editing config, restart Claude Desktop completely.

Available Tools

The MCP server exposes 100+ Empirica CLI commands as MCP tools:

Session Management:

  • session_create - Create new session
  • session_list - List sessions
  • session_show - Show session details

CASCADE Workflow:

  • preflight_submit - Submit PREFLIGHT assessment
  • check_submit - Execute CHECK gate
  • postflight_submit - Submit POSTFLIGHT assessment

Goals & Findings:

  • goals_create - Create goals
  • goals_list - List goals
  • finding_log - Log findings
  • unknown_log - Log unknowns

And many more...

Epistemic Responses

Standard Response

{
  "ok": true,
  "session_id": "abc123",
  "message": "Session created"
}

Epistemic Response

{
  "ok": true,
  "session_id": "abc123",
  "message": "Session created",

  "epistemic_state": {
    "vectors": {
      "know": 0.60,
      "uncertainty": 0.40,
      "context": 0.70,
      "clarity": 0.85
    },
    "routing": {
      "mode": "confident_implementation",
      "confidence": 0.85,
      "reasoning": "Know=0.60 >= 0.6, Uncertainty=0.40 < 0.5"
    }
  }
}

Behavioral Modes

Mode Trigger Behavior
clarify clarity < 0.6 Ask questions before proceeding
load_context context < 0.5 Load project data first
investigate uncertainty > 0.6 Systematic research
confident_implementation know >= 0.7, uncertainty < 0.4 Direct action
cautious_implementation Moderate vectors Careful, incremental steps

Troubleshooting

"empirica CLI not found"

# Check if empirica is in PATH
which empirica

# If not, install full package
pip install empirica

"Module not found: empirica"

# Install full package (not just MCP server)
pip install empirica

Claude Desktop not connecting

  1. Verify JSON syntax (no trailing commas)
  2. Quit Claude Desktop completely
  3. Restart Claude Desktop
  4. Check logs for errors

Docker

docker pull nubaeon/empirica:1.6.6
docker run -p 3000:3000 nubaeon/empirica:1.6.6 empirica-mcp

Requirements

  • Python 3.11+
  • empirica >= 1.5.0
  • mcp >= 1.0.0

Documentation

License

MIT License - See Empirica repository for details.

Project links

Data verified by PyPI on Aug 13, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Latest release

2 maintainers

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Credits

Author: David S. L. Van Assche

GitHub Statistics

Data verified by PyPI on Aug 13, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

MIT
View SPDX License List

Requires

Python >=3.11

Provides Extra

dev

Tags

mcp empirica calibration ai measurement epistemic

Classifiers

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