Alchemy
FreeNot checkedAlchemy's official MCP Server. Allow AI agents to interact with Alchemy's blockchain APIs.
About
Alchemy's official MCP Server. Allow AI agents to interact with Alchemy's blockchain APIs.
README
[!IMPORTANT] The legacy local MCP server has been retired. Its source code has been removed from this repository, and the
@alchemy/mcp-servernpm package will stop working on September 30, 2026. Use the hosted Alchemy MCP Server athttps://mcp.alchemy.com/mcpinstead.
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
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 |
JSON config for Cursor / Windsurf / Claude Desktop / Cline
{
"mcpServers": {
"alchemy": {
"type": "streamable-http",
"url": "https://mcp.alchemy.com/mcp"
}
}
}
JSON config for VS Code Copilot
{
"servers": {
"alchemy": {
"type": "http",
"url": "https://mcp.alchemy.com/mcp"
}
}
}
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:
{
"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 section above. You can drop ALCHEMY_API_KEY from your MCP config; the hosted server signs you in with your Alchemy account instead.
Installing Alchemy
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/alchemyplatform/alchemy-mcp-serverFAQ
Is Alchemy MCP free?
Yes, Alchemy MCP is free — one-click install via Unyly at no cost.
Does Alchemy need an API key?
Yes, it requires environment variables: ALCHEMY_API_KEY. Unyly injects them into the config during install.
Is Alchemy hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Alchemy in Claude Desktop, Claude Code or Cursor?
Open Alchemy on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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