{
  "page": "https://x402-list.com/apis/best-seo-api",
  "title": "What is the best SEO API?",
  "answer": "As of October 26, 2026, x402-list compares 10 SEO APIs with a priced audit, keyword, search-result, domain, backlink or Trends endpoint. The median selected call costs $0.025. The best fit depends on the data your workflow needs, so compare by data type before price.",
  "date_modified": "2026-10-26",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite_as": "x402-list, \"What is the best SEO API?\", https://x402-list.com/apis/best-seo-api, data as of 2026-10-26. Licensed CC BY 4.0.",
  "how_to_cite": "Quote the number with its date and link the page URL. Data is CC BY 4.0: attribution to x402-list is required.",
  "methodology": "https://x402-list.com/methodology",
  "criteria": {
    "listed": "online, payment-ready, 30-day uptime >= 90%, known price, description >= 80 characters",
    "price": "cheapest current SEO endpoint of each service, USD per call (not its cheapest tool of any kind); services without one are left out",
    "generalist": "a gateway matching more than three unrelated capabilities: listed, never called the cheapest",
    "buyers_30d": "distinct wallets that paid the service on-chain in the last 30 days (measured floor)",
    "best": "most distinct buyers in 30 days; ties go to higher 30-day uptime"
  },
  "in_index": true,
  "stats": {
    "services": 10,
    "with_buyers_30d": 9,
    "median_price_usd": 0.025,
    "min_price_usd": 0.001,
    "max_price_usd": 1,
    "generalists": 3,
    "left_out_no_task_endpoint": 3
  },
  "faq": [
    {
      "question": "Is there a free SEO API here?",
      "answer": "The 10 listed services have positive per-call prices for their task endpoints. Free quotes, demos or failed calls that are not charged do not make a route free; check the exact endpoint's terms."
    },
    {
      "question": "What do 100,000 SEO API calls cost?",
      "answer": "At the median selected quote of $0.025, 100,000 calls total $2,500.00. Batch routes, bundles and repeated rank checks change how many calls a workload needs."
    },
    {
      "question": "Which is the best SEO API?",
      "answer": "The one that sells the data your decision needs, for your markets, at a unit you can afford to repeat. Compare audits with audits and keyword data with keyword data, using the data-type table on this page."
    },
    {
      "question": "Does an HTTP 402 payment prove the SEO data is accurate?",
      "answer": "No. A payment requirement shows how to buy the answer, not how a volume, a position or a link count was measured. Check the provider's stated source and test known cases."
    },
    {
      "question": "Is a Google Trends score a search volume?",
      "answer": "No. Trends reports interest relative to the strongest point in the request, from 0 to 100. Use it to compare timing and regions, and use a keyword-volume route for counts."
    },
    {
      "question": "Are keyword difficulty and advertising competition the same?",
      "answer": "No. Advertising competition describes bidding for ads, while difficulty estimates how hard it is to rank organically. Keep the two numbers apart when choosing keywords."
    },
    {
      "question": "Can an audit score be compared across providers?",
      "answer": "Not directly. Each provider weighs its own checks, so a score is useful for tracking one page over time with one tool. Compare the findings, such as a missing canonical, rather than the totals."
    },
    {
      "question": "Do AI-citation checks replace rank tracking?",
      "answer": "No. They report whether AI answer engines cite a domain for given prompts, which is a different surface from a search results page. Track both when both channels matter."
    }
  ],
  "services": [
    {
      "name": "Google Trends SEO Keyword Data",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/google-trends-seo-keyword-data",
      "price_usd_per_call": 0.03,
      "networks": [
        "ARB",
        "Base",
        "POL",
        "SOL"
      ],
      "uptime_30d": 99.9,
      "latency_ms": 249,
      "buyers_30d": 42,
      "last_checked_at": "2026-10-26T19:03:12.796Z",
      "what_it_does": "Provider describes Google Trends interest over time and by region, plus related queries and topics.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/interest-by-region"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/interest-by-region",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/related-queries",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/related-topics",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/trend",
          "price_usd_per_call": 0.05
        }
      ],
      "endpoints_listed": 4
    },
    {
      "name": "WebberSites x402 Data API",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/webbersites-x402-data-api",
      "price_usd_per_call": 0.001,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 186,
      "buyers_30d": 33,
      "last_checked_at": "2026-10-26T19:03:49.630Z",
      "what_it_does": "Provider lists head and full-page audits, a site audit of up to eight pages and single checks for robots, sitemaps and schema.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/api/seo/head-check"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/api/og/check",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/schema/audit",
          "price_usd_per_call": 0.005
        },
        {
          "method": "GET",
          "path": "/api/schema/generate",
          "price_usd_per_call": 0.005
        },
        {
          "method": "GET",
          "path": "/api/seo/alt-check",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/full-audit",
          "price_usd_per_call": 0.02
        },
        {
          "method": "GET",
          "path": "/api/seo/head-check",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/links",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/metadata",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/nav",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/robots-check",
          "price_usd_per_call": 0.001
        },
        {
          "method": "GET",
          "path": "/api/seo/site-audit",
          "price_usd_per_call": 0.05
        },
        {
          "method": "GET",
          "path": "/api/seo/sitemap-check",
          "price_usd_per_call": 0.001
        }
      ],
      "endpoints_listed": 37
    },
    {
      "name": "CONNSKILL Growth Services",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/connskill-growth-services",
      "price_usd_per_call": 0.03,
      "networks": [
        "Base"
      ],
      "uptime_30d": 99.1,
      "latency_ms": 154,
      "buyers_30d": 19,
      "last_checked_at": "2026-10-26T19:03:07.195Z",
      "what_it_does": "Provider lists Google Ads keyword data, Google and Bing results, domain visibility, backlink reports and local market checks.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/page-audit"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/ai-search-volume",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/backlinks-report",
          "price_usd_per_call": 0.15
        },
        {
          "method": "POST",
          "path": "/v1/bing-serp",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/competitors",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/domain-rank",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/google-trends",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/keyword-difficulty",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/keyword-gap",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/keyword-ideas",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/keyword-metrics",
          "price_usd_per_call": 0.15
        },
        {
          "method": "POST",
          "path": "/v1/keyword-metrics-multi",
          "price_usd_per_call": 0.15
        },
        {
          "method": "POST",
          "path": "/v1/keywords-for-site",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/llm-share-of-voice",
          "price_usd_per_call": 0.1
        },
        {
          "method": "POST",
          "path": "/v1/local-market-check",
          "price_usd_per_call": 0.1
        },
        {
          "method": "POST",
          "path": "/v1/page-audit",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/ranked-keywords",
          "price_usd_per_call": 0.05
        },
        {
          "method": "POST",
          "path": "/v1/serp-report",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/site-audit",
          "price_usd_per_call": 1
        },
        {
          "method": "POST",
          "path": "/v1/traffic-estimate",
          "price_usd_per_call": 0.05
        }
      ],
      "endpoints_listed": 41
    },
    {
      "name": "HubVibe",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/hubvibe",
      "price_usd_per_call": 0.05,
      "networks": [
        "Base",
        "SOL"
      ],
      "uptime_30d": 99.9,
      "latency_ms": 200,
      "buyers_30d": 11,
      "last_checked_at": "2026-10-26T19:03:04.186Z",
      "what_it_does": "Provider lists an on-page SEO audit of a URL or raw HTML and a bundle adding accessibility, security headers and page weight.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/audit/seo"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/audit/bundle",
          "price_usd_per_call": 0.15
        },
        {
          "method": "POST",
          "path": "/audit/seo",
          "price_usd_per_call": 0.05
        }
      ],
      "endpoints_listed": 15
    },
    {
      "name": "true402",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/true402",
      "price_usd_per_call": 0.02,
      "networks": [
        "Base",
        "SOL"
      ],
      "uptime_30d": 99.5,
      "latency_ms": 131,
      "buyers_30d": 7,
      "last_checked_at": "2026-10-26T19:03:28.521Z",
      "what_it_does": "Provider lists a per-page SEO and GEO audit, robots.txt and llms.txt crawler checks and link-preview metadata.",
      "generalist": true,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/seo-audit"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/link-preview",
          "price_usd_per_call": 0.003
        },
        {
          "method": "POST",
          "path": "/v1/robots-check",
          "price_usd_per_call": 0.003
        },
        {
          "method": "POST",
          "path": "/v1/seo-audit",
          "price_usd_per_call": 0.02
        }
      ],
      "endpoints_listed": 27
    },
    {
      "name": "ForgeMesh SEO Authority",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/forgemesh-seo-authority",
      "price_usd_per_call": 0.01,
      "networks": [
        "Base"
      ],
      "uptime_30d": 99.9,
      "latency_ms": 216,
      "buyers_30d": 6,
      "last_checked_at": "2026-10-26T19:03:11.744Z",
      "what_it_does": "Provider describes Common Crawl authority scores, deterministic checks of supplied HTML and query tools without volume.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/url-seo-score"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/authority-compare",
          "price_usd_per_call": 0.02
        },
        {
          "method": "GET",
          "path": "/v1/domain-authority",
          "price_usd_per_call": 0.01
        },
        {
          "method": "GET",
          "path": "/v1/query-correct",
          "price_usd_per_call": 0.005
        },
        {
          "method": "GET",
          "path": "/v1/query-expand",
          "price_usd_per_call": 0.01
        },
        {
          "method": "POST",
          "path": "/v1/url-seo-score",
          "price_usd_per_call": 0.01
        }
      ],
      "endpoints_listed": 5
    },
    {
      "name": "Citable",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/citable",
      "price_usd_per_call": 0.008,
      "networks": [
        "SOL"
      ],
      "uptime_30d": 100,
      "latency_ms": 199,
      "buyers_30d": 2,
      "last_checked_at": "2026-10-26T19:03:16.364Z",
      "what_it_does": "Provider lists on-page audits, keyword metrics, Google results and rank checks, domain footprints, backlinks and AI-citation checks.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/serp"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/v1/ai-mentions-trend",
          "price_usd_per_call": 0.18
        },
        {
          "method": "GET",
          "path": "/v1/ai-share-of-voice",
          "price_usd_per_call": 0.18
        },
        {
          "method": "GET",
          "path": "/v1/ai-visibility",
          "price_usd_per_call": 0.2
        },
        {
          "method": "GET",
          "path": "/v1/backlinks",
          "price_usd_per_call": 0.1
        },
        {
          "method": "GET",
          "path": "/v1/citability-report",
          "price_usd_per_call": 0.3
        },
        {
          "method": "GET",
          "path": "/v1/cited-prompts",
          "price_usd_per_call": 0.25
        },
        {
          "method": "GET",
          "path": "/v1/domain-history",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/v1/domain-keywords",
          "price_usd_per_call": 0.04
        },
        {
          "method": "GET",
          "path": "/v1/domain-overview",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/v1/keyword-ideas",
          "price_usd_per_call": 0.05
        },
        {
          "method": "GET",
          "path": "/v1/keyword-metrics",
          "price_usd_per_call": 0.03
        },
        {
          "method": "GET",
          "path": "/v1/keyword-research",
          "price_usd_per_call": 0.06
        },
        {
          "method": "GET",
          "path": "/v1/keyword-suggest",
          "price_usd_per_call": 0.005
        },
        {
          "method": "GET",
          "path": "/v1/onpage-audit",
          "price_usd_per_call": 0.01
        },
        {
          "method": "GET",
          "path": "/v1/rank-check",
          "price_usd_per_call": 0.012
        },
        {
          "method": "GET",
          "path": "/v1/serp",
          "price_usd_per_call": 0.008
        },
        {
          "method": "GET",
          "path": "/v1/top-cited-pages",
          "price_usd_per_call": 0.22
        }
      ],
      "endpoints_listed": 17
    },
    {
      "name": "x402.eleeth.com",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/x402-eleeth-com",
      "price_usd_per_call": 0.02,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 153,
      "buyers_30d": 1,
      "last_checked_at": "2026-10-26T19:03:12.581Z",
      "what_it_does": "Provider lists an instant page SEO audit with a score and pass/fail checks among general agent tools.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/api/seo"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/api/seo",
          "price_usd_per_call": 0.02
        }
      ],
      "endpoints_listed": 34
    },
    {
      "name": "TradePilot Agent Commerce",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/tradepilot-agent-commerce",
      "price_usd_per_call": 1,
      "networks": [
        "Base"
      ],
      "uptime_30d": 99.6,
      "latency_ms": 334,
      "buyers_30d": 1,
      "last_checked_at": "2026-10-26T19:10:22.560Z",
      "what_it_does": "Provider lists a technical SEO audit of a URL, plus SEO plans and page drafts written from supplied inputs.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/api/agent-commerce/v1/seo-audit"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/seo-audit",
          "price_usd_per_call": 1
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/seo-page",
          "price_usd_per_call": 3
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/content_gap/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/internal_link_plan/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/keyword_cluster/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/keyword_page_map/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/local_seo_plan/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/metadata_rewrite/execute",
          "price_usd_per_call": 0.25
        },
        {
          "method": "POST",
          "path": "/api/agent-commerce/v1/services/seo_content_brief/execute",
          "price_usd_per_call": 0.25
        }
      ],
      "endpoints_listed": 75
    },
    {
      "name": "LaunchCheck Website Signals",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/launchcheck-website-signals",
      "price_usd_per_call": 0.25,
      "networks": [
        "Base"
      ],
      "uptime_30d": 99.8,
      "latency_ms": 2391,
      "buyers_30d": 0,
      "last_checked_at": "2026-10-26T19:03:46.499Z",
      "what_it_does": "Provider describes deterministic SEO, accessibility and security-header checks of one static HTML page, without crawling or JavaScript.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/api/x402/audit"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/api/x402/audit",
          "price_usd_per_call": 0.25
        }
      ],
      "endpoints_listed": 1
    }
  ]
}