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Public API

LinkBuilder.com API

Search hundreds of thousands of websites, compare placement prices across dozens of providers and find the best rates for backlinks, guest posts and sponsored articles - all through one API.

  • Bulk domain search
  • Advanced filters
  • Provider price comparison
  • SEO metrics
Get API access View API documentation
Request POST /v1/search/domains 
{
  "domains": [
    "example.com",
    "forbes.com",
    "cnn.com"
  ],
  "limit": 500,
  "sort_by": "price",
  "sort_order": "asc"
}
Result Prices per provider for every domain 
{
  "domain": "example.com",
  "prices": [
    { "provider": "Collaborator", "price": 120 },
    { "provider": "Bazoom",       "price": 135 },
    { "provider": "Adsy",         "price": 149 }
  ],
  "minimum": 120,
  "median": 140
}
Requested
5,000
Found
1,380
Returned
500
Credits used
500

One API. Dozens of link providers.

Access and compare placement data from leading guest post marketplaces, agencies and link providers through a single API.

47 Providers
458,000+ Websites
Millions of price points
Provider Websites Last update
LemmiLink 168,439 19.09.2026
Paper.club 123,347 25.09.2026
Bazoom 119,024 30.09.2026
Adsy 106,373 29.09.2026
Meup 96,748 22.09.2026
PRNews 93,889 26.08.2026
Serpzilla 91,100 28.09.2026
Links.me 87,677 22.09.2026
Linkavista 77,990 21.09.2026
SeoJungle 74,089 27.09.2026
Ereferer 71,912 30.09.2026
Easypromo 71,087 21.09.2026
GuestPostLinks 66,724 19.09.2026
Redhead Digital Agency 65,294 21.09.2026
Medialister 63,433 24.09.2026
LinkBroker 61,047 19.08.2026
LinkBuilders 49,048 21.09.2026
Linksmanagement 47,139 22.09.2026
Collaborator 44,618 30.09.2026
TopSerp.pro 43,685 16.09.2026
Mellow Promo 42,760 15.09.2026
Linkpublishers 42,074 03.01.2026
Links Stream 40,203 15.09.2026
Purolink 40,012 26.09.2026
PRPosting 39,386 26.09.2026
Growwer 39,343 19.09.2026
PR-X 38,469 25.09.2026
Backlinked 36,765 29.09.2026
NaturalLinks 31,786 24.09.2026
GetaLink.com 28,327 18.09.2026
Prensalink 27,629 25.09.2026
WMLinks 22,804 16.09.2026
MotherLink 15,842 24.09.2026
Publisuites 12,285 26.09.2026
WhiteHatLinks 11,494 16.09.2026
SeoNavigators 11,120 19.06.2026
NoBsMarketplace 10,443 28.07.2026
ContentHub 7,591 30.09.2026
NeedMyLink 7,053 15.09.2026
Link-Heroes 7,037 15.05.2026
LinksMan 5,655 22.09.2026
Takelink 2,701 28.09.2026
Insert.Link 1,701 15.09.2026
RankExplore 1,474 26.09.2026
ON-News 1,216 24.09.2026
123Media 735 29.09.2026
CitySites 86 15.09.2026

Everything you need to work with link building data programmatically

Bulk domain search

Submit your domain list and instantly check which websites are available on LinkBuilder.com.

  • Pass a large list of domains in one request
  • The whole list is checked
  • Websites are returned within your plan limit
  • Domain Credits are spent only on websites actually returned

Advanced website search

Search the database by country, language, category, price, provider and SEO filters.

  • Country
  • Language
  • Category
  • Price
  • Provider
  • Ah DR
  • Traffic
  • Majestic TF
  • Moz DA
  • CBD
  • iGaming
  • Crypto

Compare provider prices

Compare placement prices for the same website across multiple providers.

example.com
Collaborator Best price $120
Bazoom $135
Provider C $149
Provider D $185

SEO metrics

Get SEO metrics together with availability and pricing data.

Ah DR Traffic Referring domains
Majestic TF CF Referring domains
Moz DA PA

Provider filtering

Include, exclude or prioritize specific marketplaces and agencies.

provider_ids=12,17
exclude_provider_ids=22
cheapest_provider_ids=12,17

Sorting

Sort matching websites before your plan limit is applied - in bulk search and in parameter search.

  • Price
  • Ah DR
  • Ah traffic
  • Ah domains
  • Majestic TF
  • Majestic CF
  • Majestic domains
  • Moz DA
  • Moz PA

What can you build with the LinkBuilder.com API?

Automate procurement, analyze competitors, enrich SEO workflows and add link pricing intelligence to your own products.

Use case 01

Compare supplier prices

Check how much the same website costs across marketplaces and agencies and find the best available price automatically.

example.com
Supplier A$120
Supplier B$145
Supplier C$210
  • Find the cheapest supplier for a placement
  • Compare supplier pricing side by side
  • Measure the gap between minimum and median price
  • Find cheaper alternatives to your current supplier
Use case 02

Check whether you are overpaying for links

Compare your own purchase prices with current supplier prices on LinkBuilder.com.

Domain Your price Best available Difference
example.com $220 $120 $100
site2.com $170 $155 $15
site3.com $450 $260 $190
Potential savings $14,820
Use case 03

Analyze competitor backlinks

Upload domains from a competitor's backlink profile and see which of them are available through our providers.

Competitor referring domains4,520
Found on LinkBuilder.com1,840
Available through providers1,615
  • Which competitor backlinks you can buy
  • The minimum market cost of those placements
  • The median cost of those placements
  • Which of their sites are missing from your strategy
Use case 04

Estimate link building budgets

Use current market prices to estimate the cost of a backlink profile, a competitor strategy or a future campaign.

1,180 websites found
Minimum-price estimate$74,300
Median-price estimate$128,600

Estimates are based on current provider prices. They are not what a competitor actually spent.

Use case 05

Build and enrich outreach databases

Turn raw domain lists into structured prospect databases with prices, metrics, countries, languages, categories and provider availability.

Input 
example1.com
example2.com
example3.com
After the API
  • Domain
  • Country
  • Language
  • DR
  • Traffic
  • TF
  • DA
  • Minimum price
  • Median price
  • Providers
  • CBD
  • iGaming
  • Crypto

You can also find new prospects by SEO criteria you define.

Use case 06

Add link pricing data to your SEO product

You do not need to run a link marketplace to use our data. Any SEO, marketing, outreach or analytics product becomes more valuable with placement prices and provider availability.

  • SEO platforms
  • Backlink analysis tools
  • Outreach software
  • Agency dashboards
  • Marketing platforms
  • Competitive intelligence tools
  • SEO reporting tools
  • Internal SEO software
example.com
Ah DR72
Organic traffic124,500
Available for placementYes
Providers14
Best price$120
Median price$190
  • Add placement pricing to the SEO data you already provide
  • One API instead of integrating dozens of link providers
  • Link marketplaces can get every provider and price through the Marketplace API

And much more

Monitor price changes

Re-check websites over time and track how placement prices move.

Find alternative suppliers

For any current supplier, find other sources of the same placement.

Validate vendor catalogs

Check third-party catalogs and find the same websites cheaper.

Spot big price gaps

Surface domains with a large price spread between providers.

Build custom website scoring

Use API data inside your own site-quality scoring.

Create niche databases

US SaaS sites, German iGaming sites, French business publishers, crypto websites with DR 40+.

Enrich CRM data

Pull prices, metrics and availability into your agency CRM automatically.

Prioritize link opportunities

Rank websites by SEO metrics combined with cost.

Pay only for the data you receive

Send your domains or filters, and the API finds, filters and sorts the matches, then applies your plan limit. Domain Credits are charged only for websites actually returned.

  1. 1

    Send your domains or filters

    Bulk search by domain list or search by parameters.

  2. 2

    We find and sort the results

    Find matches, apply filters, sort, then apply the plan limit.

  3. 3

    Credits only for returned websites

    Submitted and unmatched domains are free.

1 returned website = 1 Domain Credit
Domains submitted5,000
Found1,380
Plan maximum (Pro)500
Returned500
Domain Credits used500

Send large requests, get results within your limit

You can submit more domains than your plan returns. The API applies your plan maximum automatically - no error.

{ "limit": 2000 }  →  applied_limit = 500

Choose which results come first

All matches are sorted before the limit is applied: with sort by Ah DR, the Pro plan returns the 500 matching domains with the highest DR.

  • Lowest price
  • Highest traffic
  • Highest DR
  • Highest TF
  • Highest DA

From request to results

Request
GET /v1/search/parameters
country_ids=225
ah_dr_from=50
price_to=300
exclude_provider_ids=12,17
limit=500
sort_by=price
sort_order=asc
Response
{
  "data": [
    {
      "domain": "example.com",
      "metrics": {
        "ah": { "dr": 71, "traffic": 98000 }
      },
      "pricing": {
        "minimum": 95,
        "median": 140,
        "offers_total": 9,
        "offers_returned": 5
      }
    }
  ],
  "meta": {
    "total_found": 18432,
    "returned": 500,
    "applied_limit": 500
  },
  "usage": { "credits_used": 500 }
}

Explore the API documentation →

Rich data in every response

Website

  • Domain
  • Country
  • Language
  • Categories
  • TLD

Pricing

  • Minimum price
  • Median price
  • Provider prices
  • Provider name
  • Provider type
  • Offers count
  • Price update date

Ah

  • DR
  • Traffic
  • Referring domains

Majestic

  • TF
  • CF
  • Referring domains

Moz

  • DA
  • PA

Special niches

  • CBD
  • iGaming
  • Crypto

API plans for every scale

The response format is the same on every plan. Your plan sets how many results you get and how many provider offers come with each website.

Pro

$55/month
  • 25,000 Domain Credits / month
  • Up to 500 websites per request
  • Best price + provider name
Offers per website 1
Get Pro
Recommended

Ultimate

$145/month
  • 200,000 Domain Credits / month
  • Up to 2,000 websites per request
  • Top 5 prices + provider names
Offers per website 5
Get Ultimate

Marketplace API

$299/month
  • 500,000 Domain Credits / month
  • Up to 10,000 websites per request
  • All prices + all providers
Offers per website all
Get Marketplace API

Custom limits available

Always know your API usage

Plan, used and remaining credits and current limits are available at any time through a dedicated endpoint.

GET /v1/account/usage
Current plan Ultimate
Credits used 72,540 / 200,000
Remaining
127,460
Max results / request
2,000
Offers / domain
5

Who is it for?

SEO agencies

Automated procurement, price audits of your own deals, enriched prospect lists.

In-house SEO teams

Competitor analysis, campaign planning, budget estimates.

SEO SaaS & marketing products

Add price intelligence and website availability to a product you already ship.

Outreach platforms

Enrich prospect databases with SEO metrics and placement data.

Link marketplaces

Get the full provider feed through the Marketplace API.

Internal SEO tools

Connect the data to your CRM, BI, dashboards and internal software.

Frequently asked questions

If you have any questions, please contact us via the Support center

Bring link pricing data into your workflow or product

Start using the LinkBuilder.com API to search websites, compare providers, analyze link opportunities and enrich your SEO software with placement pricing data.

Get API access View API documentation
Need custom limits? Contact us →