{
  "page": "https://x402-list.com/apis/keyword-research-api",
  "title": "Keyword research APIs you can pay per call",
  "answer": "As of October 26, 2026, x402-list compares 3 keyword research services with keyword data endpoints. The median selected call costs $0.03. Compare measured metrics, keyword ideas and relative Trends interest separately.",
  "date_modified": "2026-10-26",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite_as": "x402-list, \"Keyword research APIs you can pay per call\", https://x402-list.com/apis/keyword-research-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 keyword research 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": 3,
    "with_buyers_30d": 3,
    "median_price_usd": 0.03,
    "min_price_usd": 0.005,
    "max_price_usd": 0.03,
    "generalists": 0,
    "left_out_no_task_endpoint": 10
  },
  "faq": [
    {
      "question": "Is a zero-price option available?",
      "answer": "The 3 listed services have positive per-call prices for their task endpoints. Check the exact input shape and provider terms; free quotes, recipes or a free sample do not establish a zero-price paid route."
    },
    {
      "question": "What do 100,000 calls cost?",
      "answer": "At the median selected quote, 100,000 calls total $3,000.00 at $0.03 per call. This reference calculation assumes the same request shape and excludes follow-up calls, larger lists and retries."
    },
    {
      "question": "Does HTTP 402 establish a correct paid answer?",
      "answer": "It establishes a payment requirement for the request. A stored challenge, an observed payment and an accurate response are different evidence. Inspect the resource and request schema before using payment terms."
    },
    {
      "question": "Is a Google Trends score the same as search volume?",
      "answer": "A Trends score is relative interest from 0 to 100 within the requested window or region. It shows direction and seasonality, not a count of searches. Keep it in its own field."
    },
    {
      "question": "Is CPC competition the same as SEO difficulty?",
      "answer": "Advertising competition describes bidding on a term. Ranking difficulty estimates how hard it is to reach the first page organically. A provider can sell both, but they measure different things."
    },
    {
      "question": "Can a language model replace a keyword tool?",
      "answer": "A model can suggest wording from its training knowledge. Its volumes are estimates without an observed count, so verify any term with a metrics route before committing budget."
    },
    {
      "question": "Why are domain keyword routes kept apart?",
      "answer": "They list terms a site already ranks for, with positions. That helps competitive research but does not size demand for new terms, so it cannot supply the keyword research quote."
    },
    {
      "question": "Do keyword results depend on location and language?",
      "answer": "Volume, ideas and rankings change with location, language and date. Send the settings you target and store them with every result so later comparisons stay meaningful."
    }
  ],
  "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 wraps Google Trends: interest over time, interest by region, related queries and related topics.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/related-queries"
      },
      "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": "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 keyword ideas, Google Ads volume and CPC, ranking difficulty, Google Trends and domain keyword snapshots.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/keyword-ideas"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/ai-search-volume",
          "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/ranked-keywords",
          "price_usd_per_call": 0.05
        }
      ],
      "endpoints_listed": 41
    },
    {
      "name": "Citable",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/citable",
      "price_usd_per_call": 0.005,
      "networks": [
        "SOL"
      ],
      "uptime_30d": 100,
      "latency_ms": 199,
      "buyers_30d": 2,
      "last_checked_at": "2026-10-26T19:03:16.364Z",
      "what_it_does": "Provider separates keyword suggestions, keyword ideas, metrics for up to 20 terms and a one-seed research bundle from its SEO audits.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/keyword-suggest"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/v1/domain-keywords",
          "price_usd_per_call": 0.04
        },
        {
          "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
        }
      ],
      "endpoints_listed": 17
    }
  ]
}