# OpenZeppelin Solidity Contracts MCP server

> Generate Solidity contracts (ERC-20, ERC-721, ERC-1155, Governor and more) from OpenZeppelin Contracts Wizard templates.

- Listing: https://mcp.tc/i/openzeppelin
- Connect: use the server's own URL `https://mcp.openzeppelin.com/contracts/solidity/mcp` (no sign-in); clients connect to it directly. The listing link is a page, not an MCP endpoint.
- Type: remote (Streamable HTTP)
- Auth: none
- Category: [Developer Tools](https://mcp.tc/c/developer-tools)
- Vendor: OpenZeppelin
- Homepage: <https://mcp.openzeppelin.com>
- Repository: <https://github.com/OpenZeppelin/contracts-wizard>

## About

Connects to OpenZeppelin's Contracts Wizard and generates Solidity source code built from OpenZeppelin Contracts components. Tools cover ERC-20, ERC-721, ERC-1155, stablecoin, real-world asset tokens, ERC-4337 accounts, Governor contracts for DAOs, and custom contracts. Each tool takes feature options such as mintable, pausable, burnable, votes or upgradeable, and returns the contract code in a Markdown code block. Nothing is written to disk.

The server is hosted at mcp.openzeppelin.com and uses streamable HTTP. No sign-in or API key is needed. The stablecoin and RWA tools are marked experimental, and some of their features are not audited. A local package, @openzeppelin/contracts-mcp, is also available.

## What it can do

- Generate ERC-20 token contracts with optional mint, burn, pause, permit and votes
- Generate ERC-721 and ERC-1155 token contracts
- Generate stablecoin and real-world asset token contracts (experimental)
- Generate ERC-4337 account contracts
- Generate Governor contracts for DAO governance
- Generate custom contracts with access control and upgradeability options

## Tools (8)

- `solidity-erc20`: Generate an ERC-20 fungible token contract with optional features like mintable, permit and votes.
- `solidity-erc721`: Generate an ERC-721 non-fungible token contract with options like enumerable and URI storage.
- `solidity-erc1155`: Generate an ERC-1155 multi-token contract with options like supply tracking and upgradeability.
- `solidity-stablecoin`: Generate an ERC-20 stablecoin contract.
- `solidity-rwa`: Generate an ERC-20 real-world asset token contract.
- `solidity-account`: Generate an ERC-4337 account contract with signer, batching and module options.
- `solidity-governor`: Generate a Governor contract for DAO governance with timelock and quorum settings.
- `solidity-custom`: Generate a custom contract with optional pausable, access control and upgradeable features.

## Example prompts

- "Create an ERC-20 token called MyToken with symbol MTK, mintable and pausable."
- "Generate an ERC-721 contract with enumerable and URI storage extensions."
- "Make a Governor contract with a 1 day delay, 1 week period and 4% quorum."
- "Write an upgradeable ERC-1155 contract with burnable and supply tracking."

## Install

### Claude Code

1. Run this in a terminal, in your project folder:

```bash
claude mcp add --transport http openzeppelin https://mcp.openzeppelin.com/contracts/solidity/mcp
```

2. Start Claude Code and type `/mcp`. **openzeppelin** should show as connected.

Add `--scope user` to make it available in every project, not just this one.

### Claude Desktop

1. Open **Settings → Connectors** and click **Add custom connector**.

2. Name it **OpenZeppelin Solidity Contracts** and paste this URL:

```url
https://mcp.openzeppelin.com/contracts/solidity/mcp
```

3. Click **Add**. Its tools appear in the chat’s tools menu.

Claude Desktop’s JSON config file only starts local servers. Remote servers go through Connectors, and connectors you add on claude.ai show up here too.

### claude.ai

1. Open the connector form on claude.ai. This button fills in the name and URL for you:

[Add to claude.ai](<https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=OpenZeppelin%20Solidity%20Contracts&connectorUrl=https%3A%2F%2Fmcp.openzeppelin.com%2Fcontracts%2Fsolidity%2Fmcp>) (opens connector settings)

2. Check that the URL reads `https://mcp.openzeppelin.com/contracts/solidity/mcp` and click **Add**.

3. Turn it on in a chat from the tools menu.

Free plans allow one custom connector. On Team and Enterprise plans an owner adds it under **Organization settings → Connectors**.

### ChatGPT

1. On chatgpt.com, open **Settings → Security and login** and turn on **Developer mode**.

2. Go to `chatgpt.com/plugins` and click **+** to create an app for a remote MCP server.

3. Paste `https://mcp.openzeppelin.com/contracts/solidity/mcp` as the server URL and choose **No authentication**.

Developer mode is available on the web for Plus, Pro, Business, Enterprise and Education accounts.

### Cursor

[Add to Cursor](<https://cursor.com/install-mcp?name=openzeppelin&config=eyJ1cmwiOiJodHRwczovL21jcC5vcGVuemVwcGVsaW4uY29tL2NvbnRyYWN0cy9zb2xpZGl0eS9tY3AifQ%3D%3D>) (opens Cursor)

Or add it by hand to `~/.cursor/mcp.json` (all projects) or `.cursor/mcp.json` (this project):

`mcp.json`:

```json
{
  "mcpServers": {
    "openzeppelin": {
      "url": "https://mcp.openzeppelin.com/contracts/solidity/mcp"
    }
  }
}
```

### VS Code

[Install in VS Code](<https://vscode.dev/redirect/mcp/install?name=openzeppelin&config=%7B%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fmcp.openzeppelin.com%2Fcontracts%2Fsolidity%2Fmcp%22%7D>) (opens VS Code)

Or from a terminal:

```bash
code --add-mcp '{"name":"openzeppelin","type":"http","url":"https://mcp.openzeppelin.com/contracts/solidity/mcp"}'
```

Or commit it to the repo in `.vscode/mcp.json`:

`.vscode/mcp.json`:

```json
{
  "servers": {
    "openzeppelin": {
      "type": "http",
      "url": "https://mcp.openzeppelin.com/contracts/solidity/mcp"
    }
  }
}
```

### Devin Desktop

1. Add it to `~/.config/devin/mcp_config.json` (macOS and Linux) or `%APPDATA%\devin\mcp_config.json` (Windows):

`mcp_config.json`:

```json
{
  "mcpServers": {
    "openzeppelin": {
      "serverUrl": "https://mcp.openzeppelin.com/contracts/solidity/mcp"
    }
  }
}
```

2. Refresh the MCP server list in Cascade.

Devin Desktop is the new name for Windsurf. It reads `serverUrl` (or `url`) for remote servers.

### Codex

```bash
codex mcp add openzeppelin --url https://mcp.openzeppelin.com/contracts/solidity/mcp
```

Or edit `~/.codex/config.toml` directly:

`config.toml`:

```toml
[mcp_servers.openzeppelin]
url = "https://mcp.openzeppelin.com/contracts/solidity/mcp"
```

### Gemini CLI

```bash
gemini mcp add --transport http openzeppelin https://mcp.openzeppelin.com/contracts/solidity/mcp
```

This adds it to the current project. Add `-s user` to use it everywhere.

### Any client

Most clients accept this shape. Some name the URL field differently: `serverUrl` in Devin Desktop, `httpUrl` in Gemini CLI’s settings file.

```json
{
  "mcpServers": {
    "openzeppelin": {
      "type": "http",
      "url": "https://mcp.openzeppelin.com/contracts/solidity/mcp"
    }
  }
}
```

Zed puts servers under `context_servers` in its settings. Cline needs `"type": "streamableHttp"`, or it assumes SSE.

Client only starts local servers? Bridge it with `npx -y mcp-remote https://mcp.openzeppelin.com/contracts/solidity/mcp`.

## Details

- Server version: 0.7.1
- MCP protocol version: 2025-11-25
- Last checked: 2026-10-03 (reachable)
- Listed: 2026-10-03
- Updated: 2026-10-04

---
Source: https://mcp.tc/i/openzeppelin (mcp.tc is an independent directory, not affiliated with this server's publisher). Corrections: https://mcp.tc/report