内容
# Alchemy MCP Server
> [!IMPORTANT]
> **The legacy local MCP server has been retired.** Its source code has been removed from this repository, and the `@alchemy/mcp-server` npm package will stop working on **September 30, 2026**. Use the hosted Alchemy MCP Server at `https://mcp.alchemy.com/mcp` instead.
The hosted Alchemy MCP Server gives AI agents access to Alchemy's blockchain APIs and onchain data. It authenticates via OAuth — just sign in with your Alchemy account when prompted. No API key or local install required.
**Full documentation:** [alchemy.com/docs/alchemy-mcp-server](https://www.alchemy.com/docs/alchemy-mcp-server)
## Setup
| Client | Setup |
| ------------------- | ---------------------------------------------------------------------------------- |
| **Claude Code** | `claude mcp add alchemy --transport http https://mcp.alchemy.com/mcp` |
| **Codex** | `codex mcp add alchemy --url https://mcp.alchemy.com/mcp` |
| **Cursor** | Add to `~/.cursor/mcp.json` or `.cursor/mcp.json` — see JSON config below |
| **Windsurf** | Add to `~/.codeium/windsurf/mcp_config.json` — see JSON config below |
| **VS Code Copilot** | Add to `.vscode/mcp.json` — see JSON config below |
| **Claude Desktop** | Add to `claude_desktop_config.json` — see JSON config below |
| **Cline** | Open `Cline: MCP Servers` from the VS Code command palette — see JSON config below |
<details>
<summary>JSON config for Cursor / Windsurf / Claude Desktop / Cline</summary>
```json
{
"mcpServers": {
"alchemy": {
"type": "streamable-http",
"url": "https://mcp.alchemy.com/mcp"
}
}
}
```
</details>
<details>
<summary>JSON config for VS Code Copilot</summary>
```json
{
"servers": {
"alchemy": {
"type": "http",
"url": "https://mcp.alchemy.com/mcp"
}
}
}
```
</details>
For any other MCP-compatible client, point it at `https://mcp.alchemy.com/mcp` using Streamable HTTP transport.
## Migrating from the local server
If your MCP config runs the local server through `npx`, like this:
```json
{
"mcpServers": {
"alchemy": {
"command": "npx",
"args": ["-y", "@alchemy/mcp-server"],
"env": {
"ALCHEMY_API_KEY": "YOUR_API_KEY"
}
}
}
}
```
replace that entry with the hosted server config for your client from the [Setup](#setup) section above. You can drop `ALCHEMY_API_KEY` from your MCP config; the hosted server signs you in with your Alchemy account instead.
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