Backlink Indexer API Compared for 8 Services

A backlink indexer API lets your own code send link URLs to an indexing service, poll their status and read your balance, so links get pushed the moment a placement goes live instead of when someone remembers to paste them in. All eight services below have an API, and seven of them submit links. The deciding differences are whether you pay only for links that index, whether there is an endpoint that tells you what happened, and how much of the documentation you can read before you pay.

Everything here was read from each vendor's own website and API documentation on October 2, 2026. None of these vendors pays us. We sell an indexing and index monitoring tool for sites you own, which matters further down, because it changes which of these APIs you actually need.

Backlink indexer APIs compared

What to check before you wire one into your stack

Four questions sort this list faster than any feature comparison.

Do you pay for submissions or for results? SpeedyIndex, Rapid URL Indexer, Omega Indexer, IndexMeNow and Links Indexer all return credits for links that do not index, on a 24-hour to 14-day clock. One Hour Indexing and BacklinksIndexer sell a monthly or daily allowance instead, and an unindexed link is simply used up. When code submits links automatically, nobody is watching each batch, so a refund rule does the auditing for you. We worked through what each model costs per thousand links in the real cost of a backlink indexer per 1,000 links.

Can your code find out what happened? An API that only accepts URLs pushes the reporting back into a browser tab. SpeedyIndex, Rapid URL Indexer, Links Indexer and BacklinksIndexer all expose a report or status call. Omega Indexer documents a single create-campaign endpoint and points you to its MCP server or dashboard for status and credits, which is fine for an AI assistant workflow and awkward for a nightly reporting job.

Can you read the docs before you pay? SpeedyIndex, Rapid URL Indexer, Links Indexer, BacklinksIndexer and IndexCheckr publish their documentation openly, and Rapid URL Indexer and IndexCheckr both ship an OpenAPI 3.1 spec you can generate a client from. IndexMeNow keeps its docs behind a login and says its APIs are unlocked after a payment. One Hour Indexing hands out an AppId and the documentation through an application form. Neither is a reason to rule them out, but you cannot estimate the integration work until you are a customer.

What breaks at volume? Rapid URL Indexer allows 100 requests a minute per key and returns 429 above that. It also notes that requests sent with a curl user agent get blocked, so set your own. IndexCheckr limits single-URL checks to 30 every five minutes. SpeedyIndex caps a request at 10,000 links and its status call at 1,000 task IDs. Batch your submissions and you will not hit any of these.

Each API in practice

SpeedyIndex

The most complete public API in the group. REST v2 at api.speedyindex.com covers balance, task creation for Google and Yandex indexing, checker tasks for Google, Yandex and Bing, task lists, status, a short report and a full report that includes error codes such as noindex or the HTTP status. Drip feed runs over 2 to 30 days. For the Google indexer the API only offers pay-per-indexed mode at 100 tokens a link, with tokens returned automatically on day 7. Links that return 404 or 403, are blocked by robots.txt or carry noindex are not refunded, which is fair. Its pages quote three different task size limits (10,000 per API request, 100,000 per web task, 25,000 in one FAQ answer), so test with your real batch size. Our SpeedyIndex review covers the pricing ladder.

Rapid URL Indexer

The cleanest documentation of the eight: a REST API with an OpenAPI 3.1 file, an X-API-Key header, project creation with optional status-change notifications, a project status, a report as CSV or JSON, and a balance call. One credit per URL, with that credit returned for any URL not indexed in Google after 14 days. Apex mode adds two credits and Bing mode adds one, and those extras are never refunded. Packs start at $25 for 500 credits and credits do not expire. If you are comparing it with others, our Rapid URL Indexer alternatives page has the full table.

Omega Indexer

The REST side is one POST that creates a campaign: API key, campaign name, URLs separated by a pipe character, and a drip feed of up to 30 days, all sent as strings in the JSON body. Status and credits live in a hosted MCP server, which lets an AI assistant create campaigns and read their status, and in the dashboard. Credits are refunded immediately for non-indexable links and automatically for anything not indexed in 24 hours, the fastest settlement here. Plans are monthly, from $19 for 190 credits to $2,000 for 50,000, with top-ups at $0.20 a credit. More in our Omega Indexer review.

IndexMeNow

IndexMeNow says every action in its web tool is available through the API: credit count, project list, project creation, adding URLs to a project or re-indexing completed ones, and checking URL status. Its pricing cards promise a free API on all your projects, and its payment section explains that APIs unlock after a purchase. One credit equals one indexed URL, with credits returned if a URL is not indexed after 10 days. It is the most expensive per link, from $59 for 60 credits down to about $0.47 a credit at $1,999 for 4,250.

One Hour Indexing

The API is listed as "White Label API for Submitting" on the Basic, Pro and Agency plans, so the entry price for API access is $47 a month rather than the $17 Starter. Documentation and an AppId come after you fill in an application form. Plans sell a daily link allowance (10,000 a day on Basic), and the site does not say whether API submissions draw from the same allowance. There is no per-link refund; its FAQ offers your money back for the month if it cannot improve your indexing.

Links Indexer

A small API at seolinkindexer.com: every call is a POST with an action parameter for submitting a batch with a drip feed, listing batches with their statuses, and reading your balance. Pricing works out to five credits a URL, so the $5 test pack covers 50 URLs, and unindexed links get a full credit back after 14 days. Its homepage advertises from $0.05 per indexed link, while the smallest pack works out to $0.10, so price it at the pack you will actually buy.

BacklinksIndexer

An older style API that accepts GET or POST with the key in the query string, plus a separate endpoint for its booster product. Reports come by date as XML or CSV, and there is no documented balance call. It is a subscription with monthly and daily quotas, from $27 a month for 3,000 URLs (100 a day), without per-link refunds. The examples use plain http, so send your requests over https.

IndexCheckr

It submits nothing itself, but it belongs in this list because many agencies build around it. The REST API is free to use on every account with a verified email, reading data costs nothing, and each check costs one credit as it does in the app. Its submit endpoint hands a page to an indexer you have connected, including IndexMeNow, Omega Indexer, Links Indexer and Rapid URL Indexer, so one pipeline can check, submit and recheck. Checks start at $0.0075 each on the $15 pack.

Which backlink indexer API should I use?

For an automated pipeline where nobody reviews each batch, pick a pay-per-indexed service with a status endpoint: Rapid URL Indexer if you want the best documentation and a generated client, SpeedyIndex if you want the most control and Yandex too, Omega Indexer if a 24-hour refund window matters more than a REST status call. If you already check links with IndexCheckr, choose the indexer it connects to and let its submit endpoint do the routing.

Avoid paying for allowance you cannot audit. A monthly plan that uses up links whether or not they index makes sense only when your volume is high and steady enough to fill it.

If your agency already pulls rank and traffic data into one place, a data integration platform that connects your APIs and databases can pull these report endpoints in on a schedule, so indexing results land next to the rest of your client reporting instead of in a cron script someone has to maintain.

When the pages are yours, you do not need a backlink indexer

All seven submitters exist because nobody can verify ownership of a page on someone else's site, so Google's official channels are closed to you. The moment the pages are on sites you own or manage, that changes. Programmatic pages, client sites, your own guest-post hubs: those can go through the Google Indexing API from a Search Console property you control and through IndexNow, with no credits and no third party.

That is what the Indexing API for IndexNow and Google submission does on our Agency plan. One Bearer key covers every site on the subscription, a submit call takes up to 500 URLs and sends them to IndexNow and Google at once, and a status call returns each URL's Google and Bing index state with its time to index. Pages that are still missing get a plain-English reason rather than a resubmit. Our link indexer for pages you control explains where the line sits, and pricing starts at $29 a month billed annually for one site.

Questions buyers ask

Is there an API for backlink indexing?

Yes. SpeedyIndex, Rapid URL Indexer, Omega Indexer, IndexMeNow, One Hour Indexing, Links Indexer and BacklinksIndexer all offer one. Five publish their documentation openly; IndexMeNow and One Hour Indexing share it only after you buy or apply.

Can I index backlinks with the Google Indexing API?

Not on sites you do not own. Google only accepts Indexing API calls from verified owners of the Search Console property, and documents the API for job posting and livestream pages. Third-party indexers exist because of that restriction.

How much does a backlink indexing API cost?

The API itself is free with every service here; you pay for the links. Per indexed link that runs from about $0.04 at volume with Rapid URL Indexer or Omega Indexer to about $0.47 to $0.98 with IndexMeNow. One Hour Indexing and BacklinksIndexer charge a monthly plan instead.

Which backlink indexer API has the best documentation?

Rapid URL Indexer and IndexCheckr, because both publish an OpenAPI 3.1 spec you can generate a client from. SpeedyIndex has the widest set of endpoints, documented on its site and in a PDF.

Do backlink indexers really work?

Partly, and the vendors with refunds tell you so through their own terms. A refund on day 7, 10, 14 or after 24 hours exists because some share of links never index. Pick a service that tells you which ones, and check a sample yourself with an index checker API or IndexCheckr.

Related reading: the best backlink indexer for SEO agencies and whether backlinks need to be indexed at all.