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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

Connect Claude Code to tools via MCP

mcp

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mcp Changed · +60 / -0 lines

### Add a server from setup instructions written for another client #### From a URL #### From an `npx`, `uvx`, or binary command #### From an `mcpServers` JSON block

from line 149
 
 The `type: "ws"` entry accepts the same `url`, `headers`, `headersHelper`, `timeout`, and `alwaysLoad` fields as `http`. Authentication is header-only, so pass a static token in `headers` or generate one at connect time with [`headersHelper`](#use-dynamic-headers-for-custom-authentication). The `claude mcp add --transport` flag doesn't accept `ws`.
 
+### Add a server from setup instructions written for another client
+
+MCP servers aren't specific to Claude Code, so a server's setup instructions may be written for Claude Desktop, Cursor, or another MCP client and give no `claude mcp add` command. To add the server anyway, look in those instructions for one of these three things:
+
+* **A URL** such as `https://mcp.example.com/mcp`: the server is remote.
+* **A launch command** such as `npx -y @example/mcp-server`: the server runs on your machine.
+* **An `mcpServers` JSON block**: configuration written for another client's settings file.
+
+Each is one of the inputs the four options in [Installing MCP servers](#installing-mcp-servers) take. Find the shape you have below to turn it into the command Claude Code accepts. Each command writes to [local scope](#local-scope) unless you add `--scope project` or `--scope user`.
+
+#### From a URL
+
+A URL means the server is remote. For an `https://` endpoint, add it with `--transport http`, or with `--transport sse` when the instructions say the endpoint uses SSE. For a `wss://` endpoint, use [Option 4](#option-4-add-a-remote-websocket-server) instead, since `--transport` doesn't accept `ws`:
+
+```bash theme={null}
+claude mcp add --transport http example https://mcp.example.com/mcp
+```
+
+If the instructions also give an API key or token header, pass it with `--header` as shown in [Option 1](#option-1-add-a-remote-http-server).
+
+#### From an `npx`, `uvx`, or binary command
+
+A launch command means the server runs as a local stdio process. Put the whole command after `--`, so Claude Code passes flags such as `-y` to the command that starts the server instead of reading them as its own options. Pass any environment variables the instructions ask for with `--env`, after the server name and before `--`:
+
+```bash theme={null}
+claude mcp add example --env API_KEY=your-key -- npx -y @example/mcp-server
+```
+
+[Option 3](#option-3-add-a-local-stdio-server) covers the `--` separator in full.
+
+#### From an `mcpServers` JSON block
+
+An `mcpServers` block written for another MCP client, such as Claude Desktop, uses the wrapper key and entry shape Claude Code reads. Pass `claude mcp add-json` the object inside `mcpServers`, not the wrapper. Two entries need a repair first:
+
+* **A `url` with no `type`**: add `"type": "http"`, `"type": "sse"`, or `"type": "ws"` to match the endpoint. Claude Code reads an entry with no `type` as a stdio server, so a `url` entry without a `type` fails.
+* **A key with characters other than letters, numbers, hyphens, and underscores**: pick a server name that uses only those characters. Otherwise the key is the server name.
+
+For example, this block:
+
+```json theme={null}
+{
+  "mcpServers": {
+    "example": {
+      "command": "npx",
+      "args": ["-y", "@example/mcp-server"]
+    }
+  }
+}
+```
+
+becomes this command:
+
+```bash theme={null}
+claude mcp add-json example '{"command":"npx","args":["-y","@example/mcp-server"]}'
+```
+
+[Add MCP servers from JSON configuration](#add-mcp-servers-from-json-configuration) covers shell escaping and the `--scope` flag for `add-json`. To share the server with your team instead, add `--scope project`, or add the entry under `mcpServers` in `.mcp.json` at your project root and commit it. [Project scope](#project-scope) covers how Claude Code loads and approves that file.
+
+Each `claude mcp add` and `claude mcp add-json` command prints an `Added ...` line. To check that Claude Code connected, run `claude mcp get <name>`; [Server status](#server-status) covers the statuses it shows and the approval step for `.mcp.json` servers.
+
 ### Managing your servers
 
 Once configured, you can manage your MCP servers with these commands: