Iter0 MCP Server

iter0 MCP

Connect an AI agent such as Claude Code, Cursor or Codex to iter0, an AI website builder for tech founders. Through MCP, the agent can:

• build a launch website from a brief or from a reference site you are allowed to use;
• make one focused edit to a saved page;
• read your saved designs and their status;
• check a site for problems before you share it;
• publish a site to a free name.iter0.app address, and take it offline again;
• read and reply to comments left on an iter0 canvas.

Paid steps show a price quote first. Nothing is spent until you confirm the quote.

• Endpoint: https://iter0.com/api/mcp (Streamable HTTP)
• Setup page: https://iter0.com/mcp
• Developer docs: https://iter0.com/developers
• OpenAPI: https://iter0.com/openapi.json
• Agent summary: https://iter0.com/llms.txt

This repository holds connection instructions, a registry file and an agent skill. The server runs at iter0.com, and its source code is not published here.

Connect

Claude Code:

claude mcp add --transport http iter0 https://iter0.com/api/mcp

Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "iter0": {
      "url": "https://iter0.com/api/mcp"
    }
  }
}

Codex (~/.codex/config.toml):

[mcp_servers.iter0]
url = "https://iter0.com/api/mcp"

If your client needs a different format, use its own steps for adding a Streamable HTTP server, and give it the endpoint above.

Sign in

Two tools work without signing in: iter0_health and iter0_get_developer_docs.

The other tools use your iter0 account through OAuth 2, with the scopes sites:read, sites:build and sites:edit. Your client opens a sign-in page the first time it needs one. The server publishes its protected-resource metadata at https://iter0.com/.well-known/oauth-protected-resource.

For direct API calls (not MCP), create a bearer token in your account settings: https://iter0.com/settings/api-keys. The API reference is at https://iter0.com/developers.

Tools

22 tools are live on the endpoint. Costs are from the tool descriptions.

No sign-in

Building (paid steps quote first)

Designs

Publishing and checks (free)

Canvas feedback (free)

Credits

• A build costs 1 credit. An AI edit costs 0.5 credit. Publishing, checks, canvas tools, undo and restore are free.
• Every paid step returns an exact quote first, and a quote expires after 15 minutes. Nothing is spent until you confirm the quote, in the iter0 card or by saying yes in chat.
• The free plan includes 3 credits a month. Current plans are at https://iter0.com/pricing.

Agent skill

skills/iter0-website-builder/SKILL.md tells a coding agent which tools to use, in what order, and when to stop and ask you.

Official MCP Registry

server.json describes the remote server for the official MCP Registry, under the name io.github.inchwormz/iter0-mcp.

Limits

• Use real customer facts and references you are allowed to use.
• A build that has started is not a finished site. Check the result of each run.
• Generated pages do not guarantee rankings, traffic or conversion.

Licence

The files in this repository are under the MIT licence. iter0 itself is a hosted service governed by its terms and privacy policy.