python3 -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
python seed_data.py
python client.py            # spawns the server over stdio and runs the full demo

AUTO_APPROVE=1 python client.py           # non-interactive (CI, log capture)
SIMULATE_DB_OUTAGE=1 python client.py     # backing data source unreachable
MCP_TRANSPORT=http python server.py       # serve on 127.0.0.1:8000
MCP_TRANSPORT=http python client.py       # ...and connect to it

{
  "mcpServers": {
    "helios-field-service": {
      "command": "python",
      "args": ["/absolute/path/to/helios-mcp/server.py"]
    }
  }
}

1. DISCOVERY — tools
  • search_parts       [read-only]  Search the Helios spare parts catalogue...
  • get_inventory      [read-only]  Stock level and lead time for a part...
  • analyse_failure    [read-only]  Correlate a fault code with known issues...
  • create_rma         [WRITE]      Raise a Return Material Authorisation.

1. DISCOVERY — resources
  • helios://catalog/summary         Catalogue summary
  • helios://parts/{part_number}     Catalogue entry  (template)
  • helios://kb/{doc_id}             Knowledge base article  (template)

1. DISCOVERY — prompts
  • diagnose_fault(fault_code, sku, site)

  ┌─ SERVER REQUESTS CONFIRMATION ──────────────────────────────────
  │ Raise an RMA for 1 x HX2-BMS-03 (HX-200 Battery Management Board rev C)?
  │ Serial: HX200-PHX-0442
  │ Total value: $1,240.00
  └─────────────────────────────────────────────────────────────────
{"created": true, "rma_id": "RMA-00001", "value_usd": 1240.0,
 "requested_by": "mahesh.s"}

TOOL UNAVAILABLE — Failure analysis is temporarily unavailable.
                   Quote reference dddc45d0fc07 to support if this persists.

ERROR [helios-mcp] [dddc45d0fc07] Failure analysis failed:
OperationalError: could not connect to helios-db-prod-01.internal:5432: timeout

server.py            MCP server: 4 tools, 3 resources, 1 prompt
client.py            MCP client: discovery, invocation, elicitation, roots
seed_data.py         Creates data/helios.db
docs/
  architecture.md    Diagrams + transport justification
  capabilities.md    Every tool, resource and prompt documented
  security.md        Auth, least privilege, error redaction
logs/
  demo.log                 Successful discovery-and-invocation flow
  demo-db-outage.log       Backing store unreachable, client view
  server-errors.log        Server-side detail with correlation ids