---
title: "JSON-RPC 2.0 MCP call (streamable HTTP)"
method: POST
path: "/api/mcp"
tags: ["MCP"]
---

# JSON-RPC 2.0 MCP call (streamable HTTP)

`POST /api/mcp`

## Request

- Base URL: `https://www.joinsandwich.com`
- URL: `https://www.joinsandwich.com/api/mcp`
- Auth: none declared

Public read-only MCP. No authentication. Methods: initialize, ping, tools/list, tools/call, notifications/initialized. Tools: search_care_resources, get_channel, calculate_long_term_care_cost.

## Request body

- JsonRpcRequest
  - `jsonrpc` '2.0', required
  - `id` union
    - string
    - number
  - `method` string, required
  - `params` object

## Response `200`

JSON-RPC success or protocol-level error

- JsonRpcResponse
  - `jsonrpc` '2.0', required
  - `id` union
    - string
    - number
  - `result` object
  - `error` object
    - `code` integer
    - `message` string
    - `data` object
      - `hint` string

## Other responses

- `204`: notifications/initialized acknowledged
- `400`: Invalid JSON-RPC envelope

---

[API](https://skmtc.dev/joinsandwich/apis/sandwich-public-api.md) · [All operations](https://skmtc.dev/joinsandwich/apis/sandwich-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/joinsandwich/apis/sandwich-public-api/revisions/6464c8d2ca48?raw)