CaptapiCaptapi
Ad Library · Guide

How to run a Ad Library google advertiser search

TL;DR
To run a Ad Library google advertiser search, sign up for a free Captapi key, then send one GET request to /v1/ad-library/google/advertiser-search with your input. You get clean JSON back in seconds for ~45 credits (4.5/result) per call — no OAuth, scraping or platform SDKs. Run a Ad Library google advertiser search and get structured, ranked results as clean JSON.
Get your free API keyAPI reference

How to run a Ad Library google advertiser search (step by step)

  1. 1

    Get a free API key

    Create a free Captapi account (100 credits, no card) and generate an API key from the dashboard.

  2. 2

    Call the Google Advertiser Search API

    Send an authenticated GET request to /v1/ad-library/google/advertiser-search with your input. No OAuth, no scraping setup.

  3. 3

    Read the JSON response

    Parse the clean JSON response. Pass cache=true for a free 24h cache hit; default is always fresh.

Code example

curl "https://api.captapi.com/v1/ad-library/google/advertiser-search?q=nike" \
  -H "Authorization: Bearer capt_live_..."
# or: -H "x-api-key: capt_live_..."

What the response looks like

{
  "success": true,
  "data": {
    "query": "nike",
    "country": "US",
    "totalReturned": 1,
    "advertisers": [
      {
        "id": "AR17365672681860497409",
        "name": "NIKE SRL",
        "url": "https://adstransparency.google.com/advertiser/AR17365672681860497409"
      }
    ]
  }
}

Billing metadata (credits charged, cache hit/miss) is returned in the X-Captapi-Credits and X-Captapi-Cache response headers.

Request parameters

NameTypeRequiredDescription
qstring YesAdvertiser or brand to search for (min 2 characters).
countrystringNoTwo-letter ISO country code. Default US.
limitintegerNoMax items to return (default 10, max 50). Billed per result.
cachebooleanNoSet true to serve from the 24h response cache. Default false — always fetch fresh data.

Frequently asked questions

What does the Google Advertiser Search API do?

The Google Advertiser Search API lets you search and return matching results from a public Ad Library query using one GET request to /v1/ad-library/google/advertiser-search. It returns clean JSON — no OAuth or infrastructure setup required.

How many credits does the Google Advertiser Search API cost?

At the default limit this endpoint costs 45 credits (4.5 per result). Billing scales with how many results you request. Pass cache=true to serve from the 24h shared cache (0 credits on hit); default is always fresh. Failed or empty results are never charged.

Do I need a Ad Library API key or OAuth?

No. A single Captapi key works across every platform Captapi supports — YouTube, TikTok, Instagram, Facebook, Twitter/X, Reddit, Threads, Bluesky, Pinterest, LinkedIn, Rumble, Spotify, Kwai, and more. We handle proxies, rate limits, retries, and authentication for you.

Is the Google Advertiser Search API suitable for production use?

Yes. It is a stable REST endpoint with predictable JSON and automatic retries. Pass cache=true to serve from the 24h shared cache (0 credits on hit); default is always fresh. Use it for analytics, monitoring, and content automation.

Ready to run a Ad Library google advertiser search?

Start free with 100 credits — no credit card required.

Get your free API key