Serpkin is the SEO teammate for coding agents like Claude Code, Codex and Cursor. Your agent can already edit your site. It cannot see what people search for, where your pages rank, what Google indexed, or whether last week's change helped. Serpkin brings that context in, turns it into one concrete change at a time, and checks that the change worked.
Paste your site URL and Serpkin scans your public pages. Connect Google Search Console when you can. Serpkin ranks the next fix by the traffic it can bring, with the files to change, the steps, and the checks that prove it is done. Connect Claude Code, Codex or Cursor with a setup prompt, or run npx serpkin. Your agent implements the mission in your repository. You review, merge and deploy. Serpkin never edits or deploys your code.
After you ship, Serpkin verifies the change on your preview and in production, then measures rankings and clicks at 14 and 28 days against similar pages you did not change. It labels that as correlation, not proof. Serpkin does not promise rankings.
Pricing is Builder at $29 a month or $290 a year, and Pro at $79 a month or $790 a year, with two months free on yearly billing. Both start with a 7-day free trial. A card is required, and you are charged on day 8 unless you cancel first. Without a plan you can add one site and see a preview audit of up to 6 pages. The free tools on serpkin.com stay free.
Serpkin is built by Thomas Kanze, an independent developer in Costa Rica. Email hello@serpkin.com reaches the person building it.
Setup and documentation: https://serpkin.com/docs/getting-started.
