# cep-execute-stage

`station__cep__cep-execute-stage` · external (needs EXECUTION_BACKEND_URL configured) · domain `cep` · pv-relevance `non-pv`

Execute a single CEP stage

> **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

- `domain` *string* (required) — Domain being processed
- `input` *any*
- `stage` *string* (required) — Stage to execute: SEE, SPEAK, DECOMPOSE, COMPOSE, TRANSLATE, VALIDATE, DEPLOY, IMPROVE

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__cep__cep-execute-stage",
    "arguments": {
      "domain": "",
      "stage": ""
    }
  }
}
```

## Related

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