{
  "page": "https://x402-list.com/apis/backlink-api",
  "title": "Backlink APIs you can pay per call",
  "answer": "As of October 26, 2026, x402-list compares 1 backlink API whose listing describes backlink data and prices a backlink-profile route. The median selected call costs $0.1. Check index freshness, referring-domain depth and the fields a call returns before choosing.",
  "date_modified": "2026-10-26",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite_as": "x402-list, \"Backlink APIs you can pay per call\", https://x402-list.com/apis/backlink-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 backlink 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": 1,
    "with_buyers_30d": 1,
    "median_price_usd": 0.1,
    "min_price_usd": 0.1,
    "max_price_usd": 0.1,
    "generalists": 0,
    "left_out_no_task_endpoint": 11
  },
  "faq": [
    {
      "question": "Is there a free backlink API here?",
      "answer": "The 1 listed service has positive per-call prices for its task endpoints. A failed call that is not charged is not a free route; check the exact endpoint's terms."
    },
    {
      "question": "What do 100,000 backlink API calls cost?",
      "answer": "At the median selected quote of $0.1, 100,000 calls total $10,000.00. Paginated lists and repeated refreshes change how many calls a report needs."
    },
    {
      "question": "What is the difference between backlinks and referring domains?",
      "answer": "Backlinks count every link, while referring domains count the distinct sites that link. A single site can add many backlinks but only one referring domain."
    },
    {
      "question": "Does an HTTP 402 payment prove the links exist?",
      "answer": "No. A payment requirement shows how to buy a report from one index. Open a sample of the referring pages to confirm the links are still there."
    },
    {
      "question": "Is a domain authority score a search-engine metric?",
      "answer": "No. It is a provider's model of its own link graph. Use it to compare domains within that provider, not as a value a search engine publishes."
    },
    {
      "question": "Why do backlink counts differ between tools?",
      "answer": "Each tool crawls a different part of the web on its own schedule and applies its own rules for duplicates and lost links. Compare trends within one tool instead of totals across tools."
    },
    {
      "question": "Can a backlink API tell follow from nofollow links?",
      "answer": "Only when the route returns per-link attributes. Check the response schema for a rel or follow field before relying on it for an audit."
    },
    {
      "question": "How often should backlink data be refreshed?",
      "answer": "Match the refresh to the decision: monthly for competitor reviews, closer checks after a migration or a cleanup. Record the date of every call."
    }
  ],
  "services": [
    {
      "name": "Citable",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/citable",
      "price_usd_per_call": 0.1,
      "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 backlink totals with top referring domains, beside keyword, search-result, domain and AI-citation routes.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/backlinks"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/v1/backlinks",
          "price_usd_per_call": 0.1
        },
        {
          "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
        }
      ],
      "endpoints_listed": 17
    }
  ]
}