---
title: "MCP Tool-Call Stream"
method: POST
path: "/mcp/tool-call-stream"
tags: ["MCP Advanced"]
---

# MCP Tool-Call Stream

`POST /mcp/tool-call-stream`

SSE-stream of a tool call envelope.

## Request body

- ToolCall
  - `tool` string, required
  - `args` object
  - `language` 'uk' | 'en' | 'ru' | 'es' | 'pl' | 'de' | 'fr' | 'it' | 'pt'

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

---

[API](https://skmtc.net/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.net/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/529d7d36d7d6/schema)