{
  "page": "https://x402-list.com/apis/seo-api",
  "title": "SEO APIs you can pay per call",
  "answer": "As of October 26, 2026, x402-list compares 12 SEO APIs with documented task endpoints. The median selected endpoint costs $0.025 per call. Compare on-page checks, keyword data, search results, AI citations and supplied-input planning separately; the table names the endpoint behind each quote.",
  "date_modified": "2026-10-26",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite_as": "x402-list, \"SEO APIs you can pay per call\", https://x402-list.com/apis/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": 12,
    "with_buyers_30d": 10,
    "median_price_usd": 0.025,
    "min_price_usd": 0.001,
    "max_price_usd": 1,
    "generalists": 3,
    "left_out_no_task_endpoint": 1
  },
  "faq": [
    {
      "question": "Is there a free SEO API in this comparison?",
      "answer": "The 12 listed services have positive per-call prices for their task endpoints. Inspect the particular request and provider terms for no-match, free-tier or failure handling; a recorded reference quote does not establish the price of a different request shape."
    },
    {
      "question": "How much do 100,000 SEO calls cost?",
      "answer": "Using the median selected endpoint, 100,000 calls total $2,500.00 at $0.025 per call. This assumes the same request shape and paid unit. Retries, follow-up products and request-dependent pricing can change the effective total."
    },
    {
      "question": "Does an HTTP 402 check prove paid delivery?",
      "answer": "It demonstrates a payment requirement from the endpoint. It does not prove that a settled request returns accurate output. The listing reports monitoring and payment observations separately from the provider's advertised capabilities."
    },
    {
      "question": "Does an SEO score predict rankings?",
      "answer": "A checklist score describes the provider's rules over the inspected input. It does not establish a ranking outcome. Review failed checks, fetch or rendering scope, and the source document before deciding which changes to make."
    },
    {
      "question": "Are keyword ideas measured search volumes?",
      "answer": "A suggestion is a proposed phrase. A volume estimate needs a named dataset, market and date; a relative interest index needs its comparison window. The data-type table keeps planning, keyword metrics and Trends products separate."
    },
    {
      "question": "Can I audit JavaScript pages?",
      "answer": "Check the endpoint description for rendering support. An HTML-only fetch may miss content inserted by JavaScript. Compare the inspected document with the page a user sees before interpreting missing metadata or links as a production defect."
    },
    {
      "question": "What should I retain for AI citation research?",
      "answer": "Save the prompt, engine, observation time, cited URL and any sampling settings provided. An aggregate report needs its time window and denominator. Repeatable observations are more useful than an unexplained visibility score."
    },
    {
      "question": "Should I compare authority scores across providers?",
      "answer": "Retain the graph or data source and scoring definition. A score computed over Common Crawl does not become another vendor's authority scale because both use similar labels. Compare within a consistent method and period."
    },
    {
      "question": "Can an agent publish the generated SEO plan?",
      "answer": "Treat generated plans and page copy as drafts. Check business facts, search intent, links and duplicate topics before publishing. A planning endpoint can organize supplied material without having verified live demand or competitor coverage."
    }
  ],
  "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 relative interest, related queries and regional comparisons.",
      "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 page metadata, JSON-LD, links, crawler rules and bounded multi-page audits.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/api/og/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": "Local market checks, domain rankings and keyword research for AI agents.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/keyword-ideas"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/keyword-ideas",
          "price_usd_per_call": 0.03
        },
        {
          "method": "POST",
          "path": "/v1/keyword-metrics",
          "price_usd_per_call": 0.15
        }
      ],
      "endpoints_listed": 41
    },
    {
      "name": "Agent Web Reader (x402)",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/agent-web-reader-x402",
      "price_usd_per_call": 0.005,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 432,
      "buyers_30d": 13,
      "last_checked_at": "2026-10-26T19:03:28.685Z",
      "what_it_does": "Provider describes GitHub repository metadata and README discoverability scoring.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/audit"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/audit",
          "price_usd_per_call": 0.005
        }
      ],
      "endpoints_listed": 3
    },
    {
      "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 a URL or supplied-HTML SEO check and a combined audit bundle.",
      "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": 0.003,
      "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 page SEO/GEO reporting, crawler-rule checks and link-preview metadata.",
      "generalist": true,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/link-preview"
      },
      "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, supplied-HTML scoring and deterministic query tools.",
      "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": 0.01,
      "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 keyword metrics, search results, rank checks, backlink summaries and AI citation products.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/onpage-audit"
      },
      "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 a URL SEO score with pass/fail checks.",
      "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 URL audit and SEO planning or page-writing tools using supplied business 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/seo_content_brief/execute",
          "price_usd_per_call": 0.25
        }
      ],
      "endpoints_listed": 75
    },
    {
      "name": "GigSoul x402 API",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/gigsoul-x402-api-mub564zz-0",
      "price_usd_per_call": 0.04,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 125,
      "buyers_30d": 0,
      "last_checked_at": "2026-10-26T19:10:03.626Z",
      "what_it_does": "Provider describes keyword estimates from model training data, rather than live search measurements.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/analyze-seo-keywords"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/analyze-seo-keywords",
          "price_usd_per_call": 0.04
        }
      ],
      "endpoints_listed": 23
    },
    {
      "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 a single-page static HTML check spanning SEO, accessibility and security.",
      "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
    }
  ]
}