# compute-energy-charge

`station__energy__compute-energy-charge` · external (needs EXECUTION_BACKEND_URL configured) · domain `energy` · pv-relevance `non-pv`

Calculate Adenylate Energy Charge (EC) = ([ATP] + 0.5[ADP]) / ([ATP] + [ADP] + [AMP]).

> **Note:** This tool routes through an external execution backend. If `EXECUTION_BACKEND_URL` is unset on the server, calls return JSON-RPC error `-32603 "Tool execution backend not configured"`. Tools with `backend: native` execute in-process and are always callable.

## Agent metadata

- `idempotent`: unknown
- `read_only`: unknown
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `atp` *number* (required) — ATP concentration
- `adp` *number* (required) — ADP concentration
- `amp` *number* (required) — AMP concentration

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__energy__compute-energy-charge",
    "arguments": {
      "atp": 0,
      "adp": 0,
      "amp": 0
    }
  }
}
```

## Related

- [/tools](/tools) — all 3062 tools
- [/tools/energy__compute-energy-charge](/tools/energy__compute-energy-charge) — HTML page
- [/tools/energy__compute-energy-charge/json](/tools/energy__compute-energy-charge/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide