OpenZeppelin

Smart contract security library for blockchain.

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What it can do

  • Solidity Erc20: Make a fungible token per the ERC-20 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
  • Solidity Erc721: Make a non-fungible token per the ERC-721 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
  • Solidity Erc1155: Make a non-fungible token per the ERC-1155 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.

What data it sees

Do you need an account

No: the server works without sign-in

Smart contract security library for blockchain. Browse audited contracts, explore security patterns, and reference Solidity documentation.

How to connect

How to connect OpenZeppelin to Claude

The server address to paste into Claude settings:

https://openzeppelin.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect OpenZeppelin to ChatGPT

The server address to paste into ChatGPT settings:

https://openzeppelin.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect OpenZeppelin to Cursor

The server address to paste into Cursor settings:

https://openzeppelin.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (8)

Raw names from tools/list. Only developers need these.

solidity-erc20Make a fungible token per the ERC-20 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-erc721Make a non-fungible token per the ERC-721 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-erc1155Make a non-fungible token per the ERC-1155 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-stablecoinMake a stablecoin token that uses the ERC-20 standard. Experimental, some features are not audited and are subject to change. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-rwaMake a real-world asset token that uses the ERC-20 standard. Experimental, some features are not audited and are subject to change. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-accountMake an account contract that follows the ERC-4337 standard. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-governorMake a contract to implement governance, such as for a DAO. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.
solidity-customMake a custom smart contract. Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.