---
title: "Open MCP server-to-client stream"
method: GET
path: "/api/v1/mcp"
tags: ["MCP"]
---

# Open MCP server-to-client stream

`GET /api/v1/mcp`

Opens a text/event-stream connection for server-initiated notifications as described in the MCP Streamable HTTP transport. The endpoint currently sends no notifications — clients that only care about request/response use POST.

## Query parameters

- `token` string

## Headers

- `Mcp-Session-Id` string

## Response `200`

SSE stream

## Other responses

- `401` — Missing or invalid API key
- `403` — Origin rejected
- `429` — Rate limit exceeded (100 req/min; batch endpoints also reserve 100 batch item units/min before execution)

## Changes

- **2026-06-01** `422bd4dc1611` — 18 warning, 1 info
  - added the new `account_locked` enum value to the `error/code` response property for the response status `401`
  - added the new `account_locked` enum value to the `error/code` response property for the response status `429`
  - added the new `bad_request` enum value to the `error/code` response property for the response status `401`
  - added the new `bad_request` enum value to the `error/code` response property for the response status `429`
  - …15 more
- **2026-05-07** `2907497f4ca3` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/0xinsider/apis/0xinsider-api/changes/api/v1/mcp/get.md)

---

[API](https://skmtc.dev/0xinsider/apis/0xinsider-api.md) · [All operations](https://skmtc.dev/0xinsider/apis/0xinsider-api/llms.txt) · [OpenAPI document](https://skmtc.dev/0xinsider/apis/0xinsider-api/revisions/137fa0fd3297?raw)