Acorn Harness

acorn-plugins

Acorn Harness plugins for Claude Code, Codex and ChatGPT: order custom XT30 wire harnesses from AI assistants.

Acorn Harness builds custom XT30, XT30(2+2) and XT30 + JST GH wire harnesses to order, for robots, actuators, batteries and power boards. Describe the cable you need and your assistant turns it into a design, quotes the exact price, and gives you a checkout link on acornharness.com. You pay and enter the shipping address there, never in the chat. Every wire harness is Assembled in the USA, 100% continuity tested, and ships within 5 business days (US only).

All of these connect to the same remote MCP server: https://acornharness.com/mcp (Streamable HTTP, no authentication).

Claude Code

Inside Claude Code:

/plugin marketplace add almond-bot/acorn-plugins
/plugin install acorn@acorn-plugins

Or from a shell:

claude plugin marketplace add almond-bot/acorn-plugins
claude plugin install acorn@acorn-plugins

Run /mcp to confirm plugin:acorn:acorn is connected. The plugin adds the MCP server and an order-wire-harnesses skill. To add only the MCP server:

claude mcp add --transport http acorn https://acornharness.com/mcp

Codex

codex mcp add acorn --url https://acornharness.com/mcp

Or add this to ~/.codex/config.toml (or a trusted project's .codex/config.toml):

[mcp_servers.acorn]
url = "https://acornharness.com/mcp"

See codex/ for more.

ChatGPT

1. Open chatgpt.com/plugins and click +.
2. Choose Add custom MCP server.
3. Enter the URL https://acornharness.com/mcp and pick no authentication.
4. Click Create as a plugin.

The plugin package for the OpenAI plugin directory is in chatgpt/.

Claude.ai

Custom connectors need a paid Claude plan.

1. Go to Customize → Connectors → Add → Custom → Web.
2. Enter the URL https://acornharness.com/mcp.
3. Choose No sign-in and save.

Try it

Quote 10 XT30(2+2) wire harnesses, 350 mm, 16 AWG, end A straight and end B right angle down.

I need 4 XT30 pigtails, 200 mm of 18 AWG with tinned leads. Send me a checkout link.

Make a 600 mm XT30(2+2) to JST GH CAN cable with the signal pair crossed and order 2.

Repository layout

Path	What it is
.claude-plugin/marketplace.json	Claude Code marketplace acorn-plugins, listing the acorn plugin.
plugins/acorn/	Claude Code plugin: manifest, icon, .mcp.json and the ordering skill.
codex/	Codex config.toml snippet and setup notes.
chatgpt/	Agent Plugins package for ChatGPT and the OpenAI plugin directory.
server.json	Official MCP Registry entry (com.acornharness/acorn).

Full setup guide for every assistant: https://acornharness.com/developers#ai

API docs: https://acornharness.com/developers#api

Privacy and terms

• Privacy Policy. See Orders through an AI assistant for what the MCP server receives when your assistant quotes or orders a wire harness.
• Terms of Service

Questions: [email protected]

License

MIT