SpecThis
For Claude Code Users

The companion tool Claude Code deserves.

Claude Code is powerful. But without a plan, it can go off the rails. Spec This gives you a UI to write, review, and track specs—so Claude always knows what to build.

Start freeSetup guide

Free for a limited time. No credit card. 2-minute setup.

claude-code
$ claude
You: Add user authentication to the app. Create a spec in Spec This first.
Claude: I'll create a structured plan in Spec This.
Using MCP: spec-this → upsert_plan
Created plan: "Add User Authentication"
→ 4 work items, 12 file changes
Claude: Plan created. Review it at app.specthis.ai before I start coding.
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The problem

Claude Code is fast. Sometimes too fast.

You ask Claude Code to add a feature. It starts writing code immediately. Twenty files later, you realize it went in a completely different direction than you wanted.

The fix isn't to slow Claude down—it's to align it first. Anthropic's own best practices guide recommends asking Claude to plan before it codes.

But where does that plan live? In chat history that scrolls away? In a markdown file you'll forget about?

The solution

A real UI for Claude Code specs

Spec This is a dedicated app for writing and reviewing development specs. Claude Code connects to it via MCP—the same protocol that powers Claude's tool integrations.

Instead of plans getting lost in your terminal, they live in a structured UI where you can review scope, acceptance criteria, constraints, and planned file changes—all before Claude writes a single line of code.

Quick start

Set up in 2 minutes

1. Sign up and get your API key
Go to app.specthis.ai → Sign up → Settings → Copy API key
2. Add to your Claude Code config
// ~/.claude/claude_desktop_config.json
{
  "mcpServers": {
    "spec-this": {
      "command": "npx",
      "args": ["-y", "@nicholasray/mcp-specthis"],
      "env": {
        "SPEC_THIS_API_KEY": "your-api-key"
      }
    }
  }
}
3. Start using it
$ claude
You: Create a spec in Spec This for adding dark mode to the app
Full setup guide with screenshots

Make Claude Code even better.

Stop hoping Claude builds what you want. Start knowing. Free for a limited time.

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