codex.md

Install Build Web3 in Codex

The Codex plugin packages the build-web3 skill and the optional Quicknode MCP server. The skill provides architecture and security guidance locally; the MCP server adds authenticated Quicknode account and endpoint management.

Install from a local checkout

From this repository's root, add its Codex marketplace and install the plugin:

codex plugin marketplace add "$(pwd)"
codex plugin add build-web3@quicknode-agent-plugins

Use a fresh Codex thread after installation so it loads the plugin's skill and MCP tools.

Install from GitHub

Once the Codex marketplace file is merged to the default branch, install directly from GitHub:

codex plugin marketplace add https://github.com/quicknode/agent-plugins.git
codex plugin add build-web3@quicknode-agent-plugins

Verify

codex plugin list

Then, in a new thread, try:

I want to build a simple DeFi dapp on Solana. I'm not sure what stack to use.

For an MCP check, ask: List my Quicknode endpoints. Codex should guide you through the Quicknode OAuth flow on first use. A Quicknode account is only required for account and endpoint management; the skill itself works without one.

Update a local install

After editing the plugin, refresh its Codex cachebuster and reinstall it:

python3 ~/.codex/skills/.system/plugin-creator/scripts/update_plugin_cachebuster.py plugins/build-web3
codex plugin add build-web3@quicknode-agent-plugins

Start a new thread after reinstalling.