Claude SEO is an open-source Claude Code plugin that runs specialized agents and skills to audit websites across technical SEO, content quality, structured data, AI-search optimization, local and e-commerce SEO, and international SEO. SEO practitioners use it to produce prioritized recommendations based on primary-source guidance, with optional extensions for external data and crawling.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add AgriciDaniel/claude-seo --skill seo-backlinksgit clone --depth 1 https://github.com/AgriciDaniel/claude-seoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/agricidaniel/claude-seo/seo-backlinks)<a href="https://agentmods.dev/skills/agricidaniel/claude-seo/seo-backlinks"><img src="https://agentmods.dev/badge/skills/agricidaniel/claude-seo/seo-backlinks/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/agricidaniel/claude-seo/seo-backlinks"><img src="https://agentmods.dev/badge/skills/agricidaniel/claude-seo/seo-backlinks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.03216 |
| Opus 5 | $0.00037 | $0.01608 |
| Sonnet 5 | $0.00015 | $0.00643 |
| Haiku 4.5 | $0.00007 | $0.00322 |
Grade A, and why
seo-backlinks scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Backlink Profile Analysis
Source Detection
Before analysis, detect available data sources:
- DataForSEO MCP (premium): Check if
dataforseo_backlinks_summarytool is available - Moz API (free signup):
claude-seo run backlinks_auth.py --check moz --json - Bing Webmaster (free signup):
claude-seo run backlinks_auth.py --check bing --json - Common Crawl (always available): Domain-level graph with PageRank
- Verification Crawler (always available): Checks if known backlinks still exist
Run claude-seo run backlinks_auth.py --check --json to detect all sources at once.
If no sources are configured beyond the always-available tier:
- Still produce a report using Common Crawl domain metrics
- Suggest: "Run
/seo backlinks setupto add free Moz and Bing API keys for richer data"
Quick Reference
| Command | Purpose |
|---|---|
/seo backlinks <url> |
Full backlink profile analysis (uses all available sources) |
/seo backlinks gap <url1> <url2> |
Competitor backlink gap analysis |
/seo backlinks toxic <url> |
Toxic link detection and disavow recommendations |
/seo backlinks new <url> |
New and lost backlinks (DataForSEO only) |
/seo backlinks verify <url> --links <file> |
Verify known backlinks still exist |
/seo backlinks setup |
Show setup instructions for free backlink APIs |
Analysis Framework
Produce all 7 sections below. Each section lists data sources in preference order.
1. Profile Overview
DataForSEO: dataforseo_backlinks_summary → total backlinks, referring domains, domain rank, follow ratio, trend.
Moz API: claude-seo run moz_api.py metrics <url> --json → Domain Authority, Page Authority, Spam Score, linking root domains, external links.
Common Crawl: claude-seo run commoncrawl_graph.py <domain> --json → PageRank, harmonic centrality, and low-confidence rank/presence data.
Scoring:
| Metric | Good | Warning | Critical |
|---|---|---|---|
| Referring domains | >100 | 20-100 | <20 |
| Follow ratio | >60% | 40-60% | <40% |
| Domain diversity | No single domain >5% | 1 domain >10% | 1 domain >25% |
| Trend | Growing or stable | Slow decline | Rapid decline (>20%/quarter) |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 268 lines · 75 tokens per session scan A 95f395f5a3c4
seo-backlinks is a skill published in the GitHub repository AgriciDaniel/claude-seo (16,692 stars, last pushed 15d ago), licensed MIT. It adds 75 tokens to every session and 3,216 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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