Google Ads Transparency Center API
a company's live ads, by domain

The numbers

One lookup, in four figures. The price is read from our live price list each time this page renders.

Per domain with ads

$0.006

Charged only when Google returns ads.

Ads per lookup

500

One price covers them all; no paging charge.

Statuses that are free

4 of 5

No ads, no advertiser, not covered, unreadable.

Window

30 days

Ads Google showed for the advertiser, worldwide.

Per our pre-launch check on 7 November 2026, Google answered all 20 of the 20 company domains we sent, 18 of them with live ads, and a fresh read took about 12 seconds at the median. That is a check of a fixed sample before opening, not a coverage rate.

Who reads a company's Google ads, and why

A company paying for Google ads has budget, a growth target and a message it is testing in public. That is a buying signal for some teams and competitive research for others:

• Sales teams qualifying accounts. Check every domain on a list before outreach. A company running ads now is spending on growth; one that stopped last month may be rethinking it.
• Agencies pitching new clients. Open with the ads the prospect is actually running and how long each has run, instead of a generic audit offer.
• Marketers watching competitors. See which formats a competitor runs, which creatives have lasted for months and when new ones appear.
• Data and RevOps teams. Write running_now and ads_live_total into the CRM and route accounts by them.
• AI agents. One HTTP call or one MCP tool turns a domain into a short answer an agent can reason about; our guide to researching prospects with an AI agent shows where a spend signal fits a brief.

How it compares

Other Google ads APIs charge per call or per search, mostly on monthly plans. Here one lookup covers up to 500 ads for $0.006, across free follow-on pages, only when there are ads, from a prepaid balance with no plan. Figures below are from each vendor's own pricing page, read on 7 November 2026.

Proof you can check yourself

No borrowed logos and no quotes we wrote ourselves. These are figures about the API and MCP server the ads routes ship on, each linked to the place it was read.

API results: what a lookup returns

A summary you can use as is, the advertiser, and the ads themselves. Every field, parameter and error is on the ads library docs.

Your first request

One domain, the Google library.

curl "https://api.prospectapis.com/v1/ads?domain=acme.com&platform=google" \
  -H "Authorization: Bearer $PROSPECTAPIS_KEY"

This example answer shows a fictional company, trimmed to one ad:

{
  "domain": "acme.com",
  "summary": {
    "running_now": true, "platforms_running": 1, "ads_live_total": 12,
    "sentence": "Running 12 ads on Google, first seen 2026-08-02"
  },
  "platforms": [
    { "platform": "google", "status": "ok",
      "advertiser": { "id": "AR01234567890123456789", "name": "Acme",
        "page_url": "https://adstransparency.google.com/advertiser/AR01234567890123456789" } }
  ],
  "data": [
    { "id": "google.AR01234567890123456789.CR0123456789", "platform": "google",
      "advertiser_name": "Acme", "format": "image", "creative_text": null,
      "media_urls": ["https://tpc.googlesyndication.com/archive/simgad/1234567890"],
      "first_seen": "2026-08-02T00:00:00.000Z", "status": "active",
      "source_url": "https://adstransparency.google.com/advertiser/AR01234567890123456789/creative/CR0123456789" }
  ],
  "count": 1, "total": 12, "next_cursor": "eyJvIjoxLC...", "charged_usd": 0.006
}

The same domain goes straight into a company profile, a funding search and an email check.

Date range: which ads come back

A lookup returns the ads Google showed for the verified advertiser in the last 30 days, worldwide, across search, display and YouTube. Each ad carries first_seen and last_seen, and its status is active when Google showed it in the last 2 days, inactive otherwise. An ad that has run for months next to one that started last week tells you which creative the advertiser keeps paying for. Older ads are not in a lookup; a watchlist sends each change to your webhook from the day you create it, so you can keep the history yourself.

You pay for ads, not for empty answers

Every library in the answer carries a status. Only ok is charged, so a sweep of a list where many companies do not advertise costs only for the ones that do.

Watch an advertiser

1. 1

   Create a watchlist

   A watchlist with kind ads names a domain and your webhook. Creating it is free.

2. 2

   We read it again

   We re-read the library on a schedule and compare it with the last read.

3. 3

   You get the change

   A company that starts or stops advertising, or launches new creatives, arrives at your webhook as an event, $0.006 each and only when your endpoint answers 2xx.

Routes and prices

Prices come from GET /pricing. Every product is on the pricing page.

What it does not do

• No spend or impressions. Google does not publish what an advertiser spends or how often an ad was shown, outside political ads, so neither do we.
• No ad copy for Google's list. Google's list shows each creative as media. You get the media and a link to the ad; creative_text is null.
• Not a full history. A lookup covers ads shown in the last 30 days. To build a history, watch the domain and keep the events.

Questions