For Claude Code Users

The companion tool Claude Code deserves.

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

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 SpecThis first.
Claude: I'll create a structured plan in SpecThis.
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.
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

SpecThis 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.

MCP

Add SpecThis MCP in Claude Code

Point Claude Code at the SpecThis HTTP MCP endpoint. Agents get plan and repository tools — scans still run in the SpecThis UI, CLI, or GitHub.

claude mcp add --transport http spec-this https://app.specthis.ai/api/mcp --scope user

Full Claude Code MCP setup →

Quick start

Set up in 2 minutes

1. Sign up
Go to app.specthis.ai and create a free account. Stay signed in in your browser for Clerk OAuth.
2. Add SpecThis MCP (HTTP)
claude mcp add --transport http spec-this https://app.specthis.ai/api/mcp --scope user
3. Start using it
$ claude
You: Create a spec in SpecThis for adding dark mode to the app

Make Claude Code even better.

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