@arkheia/mcp-server

Arkheia MCP Server — Fabrication Detection for AI Agents

Know when your AI is making things up.

Arkheia screens model responses for fabrication using behavioural fingerprinting. Works with Claude, GPT, Gemini, Grok, Llama, Mistral, and 30+ other models. One tool call. Real-time risk scoring.

Free tier: 1,500 detections/month. No credit card.

Quick Start

npx @arkheia/mcp-server

Get a free API key:

curl -X POST https://arkheia-proxy-production.up.railway.app/v1/provision \
  -H "Content-Type: application/json" \
  -d '{"email": "[e-mail]"}'

Add to your agent config (Claude Code, Claude Desktop, Cursor, or any MCP-compatible tool):

{
  "mcpServers": {
    "arkheia": {
      "command": "python",
      "args": ["-m", "mcp_server.server"],
      "cwd": "~/.arkheia/mcp",
      "env": {
        "PYTHONPATH": "~/.arkheia/mcp",
        "ARKHEIA_API_KEY": "ak_live_your_key_here"
      }
    }
  }
}

Restart your agent. Then ask it:

"Use arkheia_verify to check this response: The Kafka 4.1 ConsumerLease API introduces a lease-based partition ownership model."

It should flag this as HIGH risk — because the Kafka 4.1 ConsumerLease API doesn't exist.

Live CLI Routing

MCP gives agents a portable arkheia_verify tool. For live vendor CLI detection, route the CLI through the Arkheia API Proxy too.

Codex subscription sessions need both transports routed:

codex \
  -c 'chatgpt_base_url="https://arkheia-proxy-production.up.railway.app/backend-api/"' \
  -c 'openai_base_url="https://arkheia-proxy-production.up.railway.app/v1"'

API-key based Codex sessions can use the OpenAI-compatible route:

OPENAI_BASE_URL=https://arkheia-proxy-production.up.railway.app/v1 codex

Use MCP for targeted checks and the proxy for automatic workflow-level detection.

What You Get

Tool	Description
arkheia_verify	Score any model response for fabrication risk (LOW/MEDIUM/HIGH)
arkheia_audit_log	Review your detection history
run_grok	Call Grok + screen for fabrication
run_gemini	Call Gemini + screen for fabrication
run_ollama	Call local Ollama model + screen
run_together	Call Together AI (Kimi, DeepSeek) + screen

35+ Model Profiles

GPT-4o, GPT-5.4, Claude Opus/Sonnet/Haiku, Gemini 2.5/3.0, Grok 4, Llama, Mixtral, CodeLlama, Falcon, Phi4, Kimi K2.5, and more. If your model isn't listed, let us know.

Pricing

Plan	Price	Detections
Free	$0	1,500/month
Single Contributor	$99/month	Unlimited
Professional	$499/month	Unlimited
Team	$1,999/month	Unlimited

Full Documentation

See the GitHub repo for:

• Complete setup guide for all agents
• CLAUDE.md template for automatic detection across projects
• Multi-agent quorum pattern
• Test prompts and examples

Feedback

• GitHub Issues: https://github.com/arkheiaai/arkheia-mcp/issues
• Email: [e-mail]

Every message is read by the founder.

Links

• Website: https://arkheia.ai
• GitHub: https://github.com/arkheiaai/arkheia-mcp