Best SEO Tools for Claude Code, Cursor & Codex (2026)

TL;DR — If you want a managed product with cloud data (Google Search Console + keyword research) and an approve-every-change workflow, use SEOAgent. If you want something free and self-hosted that you can read and edit yourself, install one of the open-source SEO skills for Claude Code. Both run right inside your coding agent.

What counts as an SEO tool for a coding agent?

A few years ago "SEO tool" meant a dashboard you logged into. Now that your site lives in a repo and you're editing it through Claude Code, Cursor, or Codex, the most useful SEO tooling runs inside the agent — it reads your files, proposes changes, and writes them as commits you review.

Three categories matter here. Skills are packaged instructions (the SKILL.md format) that teach an agent how to do SEO work — audit pages, write schema, fix metadata — and most are free and open-source. Skill packs are large multi-purpose collections that bundle SEO skills alongside dozens of others. MCP servers are connectors that hand the agent live data — a Google Search Console feed, a keyword database — without telling it what to do with it. The best setups often combine a skill (the how) with an MCP server (the data). This is one corner of the broader best AI SEO tools landscape, narrowed to what runs inside a coding agent.

How we picked

There are dozens of SEO skills on GitHub now. We weighed four things that actually decide whether one is useful day to day:

• Does it work inside your agent? It should run in Claude Code at minimum, ideally Cursor and Codex too. Thanks to the portable SKILL.md format, most do.
• Does it ground decisions in real data? "Improve this page" is guesswork without your actual search performance. Tools that pull GSC or keyword data make better calls than tools that don't.
• Who controls publishing? The good ones propose changes and let you approve them. Be wary of anything that edits and ships without a review step.
• What's the setup cost? A free skill you clone and configure yourself trades money for time. A managed product trades the reverse. Neither is wrong — it depends on what you have more of.

The best SEO tools for Claude Code in 2026

1. SEOAgent — the managed SEO engine for coding agents

SEOAgent is the only managed product on this list. It ships as a free Skill for Claude Code, Cursor, and Codex, plus a local seoagent CLI, and it audits your site and builds or improves SEO pages directly in your codebase — with you approving every change before it lands. The optional $49/mo Pro cloud (check current pricing) adds the part open-source skills can't easily give you: Google Search Console analysis, competitor and keyword research via DataForSEO, and evidence-backed suggestions that come from your real performance data rather than guesses. Best for founders and dev teams who want the local-first, human-in-the-loop workflow of a skill but with managed cloud data behind it and zero setup. Start with the free Skill.

2. claude-seo — the most comprehensive open-source skill

claude-seo bills itself as a "universal SEO skill" for Claude Code, and the project describes a large surface — roughly 25 sub-skills and 18 sub-agents spanning technical SEO, schema, GEO/AEO, local SEO, Google API integrations, and reporting. It's a self-hosted SKILL.md setup and it's free. Best for people who want maximum coverage and are comfortable cloning, configuring, and maintaining it themselves; the trade-off versus a managed product is that you supply your own data sources and do your own upkeep.

3. Agentic-SEO-Skill — the most portable open-source skill

Agentic-SEO-Skill is an "LLM-first" SEO skill built to run across a wide range of agents — Claude, Codex, Cursor, Antigravity, Windsurf, Cline, and more. The project describes around 16 sub-skills, 10 specialist agents, and a set of utility scripts. It's free and self-hosted. Best if you switch between coding agents and want one skill that follows you across all of them, rather than betting on a single tool.

4. seo-geo-claude-skills — a popular community collection

seo-geo-claude-skills is a well-known open-source SEO and GEO (generative engine optimization) skills collection for Claude Code, maintained by the community and free to use. Best for people who specifically want the AI-answer / GEO angle baked in alongside traditional SEO, and who like working with community-maintained tooling they can extend.

5. Broad skill marketplaces — SEO bundled with everything else

Large multi-purpose skill packs like wshobson/agents, alirezarezvani/claude-skills, and kodustech/awesome-agent-skills include SEO skills among many others. They're free and open-source. Best if you're already adopting a big agent-skills library for other work and want SEO included rather than installed separately — just know the SEO depth is usually shallower than a dedicated skill's.

6. MCP servers (GSC, DataForSEO) — the data layer, not a full skill

This is a complementary category rather than a head-to-head pick. A Google Search Console MCP or a DataForSEO MCP doesn't tell your agent how to do SEO — it gives any agent live SEO data to act on. Pair one with a skill above and your agent can read real search performance or keyword volumes mid-task. Best when you already know what you want done and just need to plug real data into the work. (Note that SEOAgent Pro already bundles GSC and DataForSEO, so you don't wire these up separately.)

How they compare

Tool	Type	Works in	Cloud data (GSC/keywords)	Price
SEOAgent	Managed product	Claude Code, Cursor, Codex	Yes (Pro: GSC + DataForSEO)	Free Skill / ~$49/mo Pro
claude-seo	Open-source skill	Claude Code	Bring your own	Free
Agentic-SEO-Skill	Open-source skill	Claude, Cursor, Codex + more	Bring your own	Free
seo-geo-claude-skills	Open-source skill	Claude Code	Bring your own	Free
Skill marketplaces	Open-source packs	Most agents	Bring your own	Free
GSC / DataForSEO MCP	MCP server	Any agent	Yes (data only)	Varies / often free tier

Prices change — treat the figures above as "around" and check the current numbers before you commit.

How to choose

It comes down to what you value more: managed convenience or free flexibility.

• You want a managed product with real data and an approval step → SEOAgent. If you'd rather not assemble and maintain your own stack, and you want suggestions grounded in your actual GSC and keyword data, the free Skill plus optional Pro cloud is the most direct path. It's also the right fit if you're a builder shipping SEO for developers work straight from your repo.
• You want free and hackable → an open-source skill. claude-seo, Agentic-SEO-Skill, or seo-geo-claude-skills give you the full SEO playbook as files you can read, fork, and bend to your workflow. You supply the data and the upkeep, but you pay nothing and control everything.
• You already have a data need → add an MCP server. If your agent is fine on the how but blind to your real performance, bolt on a GSC or DataForSEO MCP and keep your existing skill.

Frequently asked questions

What's the best SEO skill for Claude Code?

For a managed, zero-setup experience with cloud data and an approve-every-change workflow, SEOAgent's free Skill is the strongest pick. For a free, self-hosted option you fully control, claude-seo is the most comprehensive open-source SEO skill, with Agentic-SEO-Skill close behind if you need cross-agent portability.

Are these SEO tools free?

The open-source skills — claude-seo, Agentic-SEO-Skill, seo-geo-claude-skills, and the broader skill marketplaces — are all free and self-hosted. SEOAgent's Skill and CLI are free too; only the optional Pro cloud (GSC analysis plus competitor and keyword research) costs around $49/mo. Check current pricing before you commit.

Do they work in Codex and Cursor, or just Claude Code?

Many work across all three. Because Claude Code, Codex CLI, Cursor, Gemini CLI, Copilot, and Cline now support the SKILL.md format, skills are portable between agents. SEOAgent and Agentic-SEO-Skill explicitly target Claude Code, Cursor, and Codex; some skills are Claude-Code-first, so check each project's supported agents.

Skill vs MCP — what's the difference?

A skill teaches your agent how to do something — the steps, the checklist, the SEO playbook. An MCP server gives your agent data or access — a live Google Search Console feed, a keyword database — without prescribing what to do with it. They're complementary: a skill decides the work, an MCP supplies the facts. The best setups use both.

Can these tools publish changes for me automatically?

The good ones don't. SEOAgent is deliberately local-first and human-in-the-loop — it proposes changes as commits and waits for your approval. Open-source skills behave the way you configure them, but the safe pattern is always a review step before anything ships. Treat "edits and publishes on its own" as a reason to look closer, not a selling point.

Conclusion

If your site lives in a repo, the best SEO tool is the one that runs where you already work — inside Claude Code, Cursor, or Codex. Pick by what you have more of: short on time, want managed cloud data and an approval step, install the SEOAgent SEO agent Skill and try the free tier on a real page today. Short on budget and happy to self-host, clone claude-seo or Agentic-SEO-Skill and start auditing. Either way, keep yourself in the loop and approve every change.