Fire ONE api_call step for ONE real person of the team, for real, and return both halves: result.request = the wire request as it went out (method, URL with the variables rendered and the query appended, headers, body; before the connection's auth was injected) and result.status / http_status / response / error_code / error_message = what the target answered. The step is the draft node verbatim (ids optional, nothing saved); {{ai.<key>}} has no record to read and renders empty (or its fallback). A refusing target is status failed in a 200, never an error envelope; the error envelope is reserved for an incomplete node (422, keyed step.<field>) or an unknown person (404). Throttled 10/min. Use it before publish to see exactly what a journey would send.

Contract:

• MCP tool test_api_call_workflow, registry package mcp.playtables/workflows, mount playtables.workflows.
• Operation action, response envelope action.
• Flags: none.