Most business owners think they need to hire an expensive SEO consultant to audit their website. They don’t. OpenCode, a free and open-source AI coding agent, can do the work for you without any upfront cost. In this guide, we’ll walk through exactly how to set up OpenCode and use it to identify and fix SEO problems on your entire site.

What Is OpenCode?

OpenCode is one of the few truly free, open-source AI coding agents available today. It’s designed to help you build, audit, and optimize code without paying monthly subscription fees. The tool works through your terminal, though a desktop application is also available for Windows, Mac, and Linux.

The key advantage of OpenCode is that it combines accessibility with power. You get free access to basic models, and if you need more advanced capabilities, you can upgrade to the OpenCode Go plan for $10 per month. This gives you access to powerful models like DeepSeek V4 Pro, which would cost much more on other platforms.

Installing OpenCode

Getting started with OpenCode is simple. The installation process only requires copying and pasting a single command into your terminal. You’ll find detailed installation instructions on the OpenCode website. Once installed, you can run it directly from your terminal without needing to open a desktop application, though the desktop version is available if you prefer a graphical interface.

The terminal approach is where OpenCode really shines for productivity. Most developers and technical operators work in the terminal already, so this integration feels natural and fast.

Understanding OpenCode Pricing

OpenCode offers three main pricing options:

Free Plan (OpenCode Zen): This plan includes access to free models like Big Pickle, DeepSeek V4 Flash Free, and others. There’s no monthly charge, and you can use these models indefinitely. This is perfect if you’re just getting started or running light workloads.

OpenCode Go Plan: At $10 per month, this plan gives you access to more powerful models like DeepSeek V4 Pro and newer Chinese AI models including GLM5.2 and Kimmy K3. The monthly cost is built into a subscription, so you’re not paying per token or per usage.

Premium Models with API Keys: If you want to use ChatGPT or Claude, you’ll need to enter your own API key. This method charges by usage and tends to be more expensive than the subscription plans. Most users find the Go plan offers better value.

When you sign up through certain referral links, you receive $5 in usage credits, and the person referring you also gets $5. This can help offset the cost of the subscription.

How to Access Your Skills

OpenCode works with skills, which are pre-built templates for specific tasks. To view all available skills, type /skills in your OpenCode terminal and press Enter. This displays every skill you can currently access.

There are over a million skills available on skills.sh. Many are community-created and free to use. If you’re interested in learning how to create your own custom skills, the process is straightforward and well-documented.

For this guide, we’re focusing on the SEO audit skill, which comes built into most OpenCode harnesses by default. This skill automates the entire process of scanning your website for SEO problems.

Running Your First SEO Audit

Let’s walk through how to audit a website using OpenCode. In this example, we’ll audit visiscan.app, an AI search visibility scanner. Here’s what happens when you run the SEO audit skill:

Step 1: Start the Audit
Type in the SEO audit skill command with your website URL. OpenCode will begin scanning your site immediately.

Step 2: Monitor the Process
As the audit runs, you’ll see real-time feedback on what’s being checked and optimized. OpenCode displays progress updates in your terminal.

Step 3: Review the Issues Found
The audit identifies specific SEO problems on your site. These might include missing meta tags, poor heading structure, missing important files, or other technical issues.

Step 4: Let AI Fix the Issues
Here’s the powerful part: OpenCode doesn’t just identify problems. It automatically generates fixes and can apply them to your code. You’ll see the corrections being made in real-time.

Critical SEO Files OpenCode Checks

During an SEO audit, OpenCode specifically looks for three critical files that most websites are missing:

Robots.txt File
This file tells search engines which parts of your website to crawl and index. It’s one of the foundational files for SEO.

AI.txt File
This newer file is important for ranking in AI answer engines like ChatGPT, Perplexity, Claude, and Gemini. Many websites don’t have this file at all, which is why they don’t appear in AI search results.

Sitemap.xml File
This is the single most important file for ranking in traditional search engines. The sitemap tells Google, Bing, and other search engines exactly what pages exist on your site and when they were last updated.

OpenCode will check if these files exist, examine their contents, and create or update them as needed. If any are missing, the tool generates them automatically.

Choosing the Right AI Model

OpenCode gives you flexibility in which AI model powers your audit. When you first run an audit, you might be assigned to your plan’s default model. If you’re running low on credits, you can switch to a free model at any time.

Using DeepSeek V4 Pro
If you’re on the Go plan, DeepSeek V4 Pro is an excellent choice for SEO audits. It’s powerful and efficient with tokens.

Switching to Free Models
When you’re approaching your monthly limit, simply switch to DeepSeek V4 Flash Free or another free model. This way, you never have to stop working.

You can check your usage dashboard at any time to see exactly how many tokens you’ve used and when your credits reset. Most plans reset monthly, giving you fresh tokens to work with.

Token Efficiency and RTK

One advanced feature OpenCode offers is RTK (Recursive Token Kompression), which compresses tokens to increase efficiency. This technology helps you accomplish more work within your monthly credit limit.

When RTK is enabled, you might see token efficiency around 81% or higher. This means you’re getting more done with fewer tokens. For example, if you’ve saved 35 million tokens over time, your RTK efficiency is working hard in the background.

Integrating OpenCode with Other Tools

OpenCode isn’t an island. You can integrate it with other AI agents and coding platforms. For instance, if you use Hermes Agent, you can access OpenCode models directly within that interface.

To do this, type /mod in your Hermes terminal to see available models. You can then select any OpenCode model you have access to, including free options. This flexibility means you can switch between different AI tools without constantly jumping between platforms.

Deploying Your SEO Fixes

After OpenCode completes the SEO audit and fixes, you need to deploy the changes to your website. Here’s the typical workflow:

Step 1: Commit Your Changes
Use the standard Git command to commit your changes. In the terminal, this looks like git commit with a message describing what was fixed.

Step 2: Push to Your Hosting
Push your committed changes to your hosting platform. Many developers use Vercel, which integrates seamlessly with this workflow.

Step 3: Automatic Redeployment
Once you push the changes, your hosting platform automatically redeploys your site with the SEO improvements.

Step 4: Wait for Search Engines
After deployment, search engines and AI answer engines gradually discover and index your improved pages. This takes time, but having proper SEO files and optimized content will help you rank faster.

What Gets Optimized

The SEO audit skill focuses on technical SEO and content optimization. This typically includes:

• Blog article optimization for better keyword targeting
• Meta tag creation and improvement
• Heading structure refinement
• Internal linking suggestions
• Content length and quality checks
• Image alt text optimization
• Mobile-friendliness checks

For a website like viscan.app, the skill might focus heavily on optimizing blog articles, since strong blog content is often the fastest path to search engine rankings.

Real-World Cost Savings

Here’s what makes OpenCode particularly valuable for small businesses and founders: the cost comparison is striking.

A professional SEO consultant might charge $2,000 to $10,000 for a comprehensive website audit. An SEO agency might charge $3,000 to $8,000 per month for ongoing optimization. OpenCode delivers similar results for $0 (with the free plan) or $10 per month (with the Go plan).

The only trade-off is your time learning the tool and running the audits yourself. For most founders and operators, this is a worthwhile exchange.

Using OpenCode for Multiple Websites

If you run multiple websites, OpenCode’s economics become even better. You can audit and optimize as many sites as you want for the same $10 monthly cost. Each audit takes 10 to 30 minutes depending on site size, and you can run audits on multiple sites in parallel.

Accessing the VS Code Extension

If you prefer working in VS Code (one of the most popular code editors), OpenCode has an extension available. You can install it directly within VS Code and run OpenCode audits without leaving your development environment. Similar extensions exist for Cursor, Zed, Windsurf, and other code editors.

The GitHub Community

OpenCode is open-source, with its GitHub repository currently receiving 150,000 stars. This level of community support means the tool is actively maintained, new features are added regularly, and you can see exactly how it works under the hood.

FAQ: Common Questions About OpenCode for SEO

Q: Is OpenCode really free to start?
A: Yes. You can use OpenCode completely free with the Zen plan. You get access to free AI models and can run unlimited audits. The $10 per month Go plan is optional if you want access to more powerful models.

Q: How long does an SEO audit take?
A: Most audits complete in 10 to 30 minutes depending on your website’s size and complexity. Larger sites with hundreds of pages might take longer.

Q: Will my SEO rankings improve immediately after deploying fixes?
A: No. Search engines take time to crawl, re-index, and re-rank your pages. You might start seeing improvements within 1 to 4 weeks, though more significant ranking improvements typically take 2 to 3 months.

Q: Can OpenCode fix old-school SEO problems like backlinks?
A: No. OpenCode focuses on technical SEO and on-page optimization. It cannot acquire backlinks from other websites. However, fixing your technical SEO and content is often the first step that makes backlink strategies more effective.

Q: What if I don’t have coding experience?
A: OpenCode handles most of the coding for you. You mainly need to know how to use a terminal and run commands. The tool generates and applies code fixes automatically.

Q: Can I use OpenCode for websites built with WordPress?
A: Most directly, no. OpenCode works best with static sites and sites where you have direct access to files. However, many modern website builders and hosting platforms are compatible. Check the OpenCode documentation for your specific setup.

Q: How does OpenCode compare to hiring an SEO consultant?
A: OpenCode is faster and cheaper, but it’s also more automated. A consultant might provide strategic guidance beyond just technical fixes. For most small businesses, the technical optimization OpenCode provides is sufficient.

Q: What models are included in the $10 per month plan?
A: The Go plan includes access to DeepSeek V4 Pro, GLM5.2, and Kimmy K3. These are powerful Chinese AI models that handle code generation and optimization efficiently.

Q: Can I cancel my subscription anytime?
A: Yes. Most AI subscription plans, including OpenCode Go, allow monthly cancellation with no long-term commitment.

Q: What files will OpenCode create or update?
A: The three main files are robots.txt, AI.txt, and sitemap.xml. OpenCode also optimizes content within your pages, including meta descriptions, heading tags, and other on-page elements.

Q: How do I know which model to use for my audit?
A: Start with your plan’s default model. If you’re running low on monthly credits, switch to a free model. All models produce similar quality results for SEO audits.

Next Steps to Get Started

Ready to audit your website without expensive consultant fees? Here’s your action plan:

This Week:

1. Visit the OpenCode website
2. Copy the one-line installation command
3. Paste it into your terminal and install OpenCode
4. Explore the /skills command to see available skills

Next Week:

1. Run your first SEO audit using the built-in skill
2. Review the issues OpenCode identifies
3. Let the tool fix the problems automatically
4. Deploy the changes to your hosting platform

If You Need More Power:

1. Sign up for the OpenCode Go plan ($10 per month)
2. Enjoy access to more advanced AI models like DeepSeek V4 Pro
3. Run audits on multiple websites to maximize your investment

The Bigger Picture: Automation for Your Entire Business

SEO optimization is just one way AI coding agents can save you money. The same principles apply to dozens of other business processes. Many of these workflows are currently costing you thousands of dollars in consultant fees, agency retainers, and wasted time.

The question isn’t whether your business can afford automation. The question is whether your business can afford to keep doing things the old way.

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Next Steps

If you want help finding the best AI automation opportunities inside your business, book a free AI consultation call here.