# OpenClaw Skills: How to Build Your Own Custom Skill

> Learn how to build custom skills for OpenClaw AI agents. Create your own tools, integrate APIs, and extend your agent's capabilities step-by-step.

**Published:** Mar 14, 2026 | **Author:** Michael Park | **Read time:** 12 min read

Learn how to build custom skills for OpenClaw AI agents. Create your own tools, integrate APIs, and extend your agent's capabilities step-by-step.

---

- OpenClaw Skills: How to Build Your Own Custom Skill' subtitle="Learn how to build custom skills for OpenClaw AI agents. Create your own tools, integrate APIs, and extend your agent's capabilities step-by-step." readTime="12 min read" publishDate="Mar 14, 2026" author="Michael Park" /> OpenClaw comes with powerful built-in skills. But every workflow is different. When you need something specific — a company API, a custom calculation, a unique integration — you build a custom skill. This guide shows you how to create your own OpenClaw skill from scratch. No complex framework to learn. Just JavaScript and a simple API. What Is an OpenClaw Skill? A skill is a JavaScript module that: Exposes one or more **tools** to the agent

OpenClaw comes with powerful built-in skills. But every workflow is different. When you need something specific — a company API, a custom calculation, a unique integration — you build a custom skill.

This guide shows you how to create your own OpenClaw skill from scratch. No complex framework to learn. Just JavaScript and a simple API.

OpenClaw comes with powerful built-in skills. But every workflow is different. When you need something specific — a company API, a custom calculation, a unique integration — you build a custom skill.

This guide shows you how to create your own OpenClaw skill from scratch. No complex framework to learn. Just JavaScript and a simple API.


## What Is an OpenClaw Skill?

A skill is a JavaScript module that:

- Accepts parameters from natural language
- Returns results for the agent to use
- Has access to the file system and network

Think of skills as plugins that extend what your [OpenClaw agent](/blog/what-is-openclaw/) can do.


## Setting Up Your Development Environment

You'll need:

- Node.js 18+ installed
- A text editor (VS Code recommended)
- OpenClaw installed: `npm install -g openclaw`


## Skill Structure

A minimal skill has three files:


### skill.json

Defines your skill's tools:


```bash
{`{
  "name": "weather-skill",
  "version": "1.0.0",
  "description": "Get weather information for any city",
  "tools": [
    {
      "name": "get_weather",
      "description": "Get current weather for a city",
      "parameters": {
        "type": "object",
        "properties": {
          "city": 
        },
        "required": ["city"]
      }
    }
  ]
}`}
```


### index.js

Implements the tools:


```bash
{`// index.js
const axios = require('axios');

module.exports = {
  async get_weather() {
    const response = await axios.get(
      \`https://api.weather.com/v1/current?city=\$\`
    );
    
    return ;
  }
};`}
```


## Building Your First Skill

Let's build a skill that fetches stock prices:

Create `skill.json`:


```bash
{`{
  "name": "stock-price",
  "version": "1.0.0",
  "description": "Get current stock prices",
  "tools": [
    {
      "name": "get_stock_price",
      "description": "Get current price for a stock symbol",
      "parameters": {
        "type": "object",
        "properties": {
          "symbol": 
        },
        "required": ["symbol"]
      }
    }
  ]
}`}
```

Create `index.js`:


```bash
{`const axios = require('axios');

module.exports = {
  async get_stock_price() {
    try {
      const response = await axios.get(
        \`https://api.example.com/stocks/\$\`
      );
      
      return ;
    } catch (error) {
      return { error: \`Could not fetch price for \$\` };
    }
  }
};`}
```


## Testing Your Skill

Test locally before deploying:


```bash
{`# Test the skill
openclaw skill test .

# Or test a specific tool
openclaw skill test . --tool get_stock_price --input ''`}
```


## Deploying to OpenClaw

Install your skill in an agent:

Add to your agent's `openclaw.yaml`:


## Example Skills

#### Database Query

Query SQL databases and return results to the agent.

#### File Converter

Convert between CSV, JSON, Excel formats.

#### Slack Notifier

Send messages to Slack channels.

#### Calculator

Advanced math with unit conversions.


## Ready to Build Your Skill?

Deploy OpenClaw and start creating custom tools today.

[Get Started →](https://www.ampere.sh/setup)


## Frequently Asked Questions

### What programming language do I need?

JavaScript or TypeScript. OpenClaw skills run in Node.js. If you know basic JavaScript, you can build skills.

### Can I use external APIs?

Yes! Skills can make HTTP requests to any API. Just handle authentication properly and document rate limits for users.

### How do I share my skill?

Publish to npm with the 'openclaw-skill' keyword. Other users can install with 'openclaw install your-skill'.

### Can skills store data?

Yes. Skills can read/write to files in their directory or use the agent's MEMORY.md. For databases, use external services via API.

### Are there limits on what skills can do?

Skills run in the same sandbox as the agent. File system access, network requests, and child processes work. No special privileges required.