SEO Page Analyzer

Full on-page SEO audit for any URL. Score 0-100, meta tags, headings, schema markup, images, links, load time. Prioritized fixes. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "seo-analyzer": {
      "url": "https://seo-analyzer.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://seo-analyzer.api.klymax402.com/api/audit?url=https://example.com"
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
seo_audit_page	GET	/api/audit	$0.06	Full SEO audit of a single URL
seo_audit_batch	POST	/api/audit/batch	$0.40	SEO audit of up to 10 URLs in batch

seo_audit_page

Use this when you need to analyze a webpage's on-page SEO health. Returns a structured JSON audit with score 0-100 and prioritized recommendations.

Parameters

Name	Type	Required	Description
url	string	yes	Full URL to audit (e.g. https://example.com)

Example response:

{"score":72,"title":{"content":"My Page","length":7},"headings":{"h1":1,"h2":3},"images":{"total":5,"missingAlt":2},"issues":[{"severity":"critical","message":"Missing meta description"}]}

When to use: optimizing any webpage, writing SEO recommendations, or auditing a client's site. Essential for competitive page-level analysis and content audits.

Not for: content extraction (use web_scrape_to_markdown), screenshots (use capture_screenshot), tech detection (use website_detect_tech_stack).

seo_audit_batch

Use this when you need to compare SEO health across multiple pages at once (up to 10 URLs). Returns the same full audit as seo_audit_page for each URL in a single call.

Parameters

Name	Type	Required	Description
urls	array	yes	Array of URLs (max 10)

Example response:

{"results":[{"url":"https://a.com","score":85},{"url":"https://b.com","score":62}],"summary":{"avgScore":73,"worstUrl":"https://b.com"}}

When to use: competitor analysis, sitemap audits, or comparing landing pages side by side. Essential when benchmarking multiple pages in one workflow.

Not for: single URLs (use seo_audit_page), content extraction (use web_scrape_batch).

Example agent prompts

• "Analyze a webpage's on-page SEO health"
• "Compare SEO health across multiple pages at once (up to 10 URLs)"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT