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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 1 credit per call — no OAuth, scraping or platform SDKs. Run a Ad Library google advertiser search and get structured, ranked results as clean JSON.
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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?

Each successful call costs 1 credit. 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