---
title: "Current MCP Streamable HTTP endpoint"
method: POST
path: "/mcp"
tags: ["MCP"]
---

# Current MCP Streamable HTTP endpoint

`POST /mcp`

## Request

- Base URL: `https://api.m2msentinel.com`
- URL: `https://api.m2msentinel.com/mcp`
- Auth: none required

Processes one MCP JSON-RPC request, notification, or response per POST. Negotiates the current 2026-07-28 protocol and stateless 2025-era clients. Tool execution enforces API-key or x402 access at the API layer.

## Request body

- object

## Response `200`

MCP JSON-RPC response as JSON or an SSE response stream, according to protocol negotiation

- object

## Other responses

- `202`: MCP notification or response accepted with no response message
- `400`: Malformed input
- `403`: Origin rejected
- `406`: Required MCP response content type was not accepted

---

[API](https://skmtc.dev/m2msentinel/apis/m2m-sentinel-base-contract-capability-checks-before-you-sign.md) · [All operations](https://skmtc.dev/m2msentinel/apis/m2m-sentinel-base-contract-capability-checks-before-you-sign/llms.txt) · [OpenAPI document](https://skmtc.dev/m2msentinel/apis/m2m-sentinel-base-contract-capability-checks-before-you-sign/revisions/2dadd4e704fd?raw)