seocli — SEO Crawling & Auditing CLI for AI Agents

"审计一下 example.com 的 SEO" → agent invokes seocli, returns structured issue report.

seocli is a dual-mode SEO auditing tool built for AI agent integration:

• CLI mode — seocli https://example.com → structured JSON on stdout
• MCP mode — tools for Claude Code and any MCP-compatible agent framework

Crawl any website, extract SEO data, detect issues, get actionable JSON output.

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Install

pip install seocli[js,mcp]

# Optional: JS rendering for SPAs
pip install playwright && playwright install chromium

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Quick Start

# Quick audit — JSON printed to stdout
seocli https://example.com --quiet

# Deep crawl with output file
seocli https://example.com --depth 5 --json report.json

# Local dev server (no delay)
seocli http://localhost:3000 --delay 0

# JavaScript-rendered SPA
seocli https://spa-site.com --js

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MCP Integration

seocli ships with an MCP server — register it in your agent's MCP configuration:

Claude Code

Add to ~/.claude/mcp.json:

{
  "mcpServers": {
    "seocli": {
      "command": "python3",
      "args": ["-m", "seocli.server"]
    }
  }
}

Then restart Claude Code. Two tools become available:

Tool	Description
seocli_audit	Full crawl + audit. Returns pages, issues, links, stats as JSON.
seocli_issues_summary	Quick shallow crawl + grouped issue summary. Faster.

Any MCP Host

seocli uses the standard Model Context Protocol — it works with any MCP-compatible client. Just point your MCP host at python3 -m seocli.server.

Agent Prompt Example

When configuring an agent to use seocli, describe it like this:

You have access to the `seocli_audit` MCP tool. When the user says
"audit example.com for SEO issues", call it with the URL. Parse the
`issues` array from the result and present:
- Errors first (🔴), grouped by category
- Warnings second (🟡), grouped by category
- Key stats: pages crawled, response time, issue count

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Agent Decision Guide

When to use --js

• The site is a known SPA (React/Vue/Angular with client-side rendering)
• Tags don't appear in raw HTML: curl <url> returns no meta tags
• Default: no JS (faster, lighter, fewer dependencies)

When to use --delay

• Own/local site: --delay 0 (fastest, no artificial wait)
• Other people's sites: --delay 1.0 at minimum (be polite)
• The delay is seconds between requests — 1.0 = 1 request/second

When to use --respect-robots

• Other people's sites: keep enabled (default: on)
• Own site with restrictive robots.txt: use --no-robots

Finding Priority (high → low)

Priority	Type	Category	Example
🔴 1	error	SEO	Missing title tag
🔴 2	error	Technical	404, 5xx status codes
🔴 3	error	Indexability	noindex on critical pages
🟡 4	warning	SEO	Title too long/short
🟡 5	warning	Social	Missing OG/Twitter tags
🟡 6	warning	Technical	Missing canonical URL
🔴 7	error	Content	Broken image, missing alt text
🟡 8	warning	Content	Thin content (< 300 words)
🟡 9	warning	Performance	Slow page load (> 2s)
🔵 10	info	Technical	Redirect detected (verify)

---

JSON Output Structure

{
  "url": "https://example.com",
  "stats": {
    "crawled": 42,
    "discovered": 85,
    "depth": 3,
    "speed": 5.2,
    "elapsed_seconds": 8.1
  },
  "pages": [
    {
      "url": "https://example.com/",
      "status_code": 200,
      "title": "Page Title",
      "meta_description": "Description...",
      "h1": "Heading",
      "h2": ["Subheading"],
      "word_count": 450,
      "lang": "en",
      "canonical_url": "...",
      "og_tags": { "og:title": "...", "og:description": "...", "og:image": "..." },
      "twitter_tags": { "twitter:card": "summary_large_image" },
      "json_ld": [{ "@type": "WebSite", ... }],
      "analytics": { "gtag": true, "ga4_id": "G-XXXXX" },
      "images": [{ "src": "...", "alt": "...", "width": "", "height": "" }],
      "hreflang": [{ "hreflang": "en", "href": "..." }],
      "internal_links": 15,
      "external_links": 3,
      "response_time": 234.5,
      "size": 12450,
      "viewport": "width=device-width, initial-scale=1",
      "robots": "index, follow",
      "is_internal": true,
      "depth": 0,
      "linked_from": ["https://example.com/other"]
    }
  ],
  "links": [
    {
      "source_url": "https://example.com/",
      "target_url": "https://example.com/about",
      "anchor_text": "About us",
      "is_internal": true,
      "target_domain": "example.com",
      "target_status": 200,
      "placement": "body"
    }
  ],
  "issues": [
    {
      "url": "https://example.com/page",
      "type": "error",
      "category": "SEO",
      "issue": "Missing Title Tag",
      "details": "Page has no title tag"
    }
  ]
}

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Issue Classification

Issue Types

Type	Meaning	Action
error	Must fix	Missing title, 404, noindex, broken images
warning	Should fix	Title too long/short, thin content, slow page
info	Note	Redirect detected, informative findings

Issue Categories

SEO · Technical · Content · Mobile · Accessibility · Social · Structured Data · Performance · Indexability · Duplication

---

CLI Usage

Scenario	Command
Quick audit	seocli https://example.com
Quiet (agent)	seocli https://example.com --quiet
Save to file	seocli https://example.com --json report.json
Local dev	seocli http://localhost:3000 --delay 0
Polite crawl	seocli https://other.com --delay 1.0 --respect-robots
SPA audit	seocli https://spa.com --js
Deep crawl	seocli https://big.com --depth 5 --max-urls 2000
No duplication check	seocli https://big.com --no-duplicate-check

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Options

seocli <url> [options]

positional:
  url                   Website URL to audit

options:
  --depth N             Max crawl depth (default: 3)
  --max-urls N          Max URLs to crawl (default: 500)
  --delay SECONDS       Seconds between requests (default: 0 = no limit)
  --js                  Enable JavaScript rendering (requires playwright)
  --respect-robots      Respect robots.txt (default: on)
  --no-robots           Ignore robots.txt
  --concurrency N       Max concurrent requests (default: 5)
  --json FILE           Save JSON output to file
  --quiet, -q           Suppress progress output
  --no-duplicate-check  Skip duplicate content detection (faster on large sites)
  --help                Show this help

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Extras

JS Rendering

pip install seocli[js]
playwright install chromium
seocli https://spa-site.com --js

MCP Only

pip install seocli[mcp]
python -m seocli.server

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License

MIT