Ad Library

GET /v1/ad-library/google/advertiser-search

Google Advertiser Search API

Run a Ad Library google advertiser search and get structured, ranked results as clean JSON.

1 credit per request

Try in Playground Get your API key — free Read the docs

TL;DR

Run a Ad Library google advertiser search and get structured, ranked results as clean JSON. The Google Advertiser Search API (Ad Library) is a single authenticated GET request to /v1/ad-library/google/advertiser-search that responds with clean JSON and costs 1 credit. Pass cache=true for a free 24h cache hit; default is always fresh. Start with 100 free credits — no credit card.

What is the Google Advertiser Search API?

The Google Advertiser Search API lets you search and return matching results for Ad Library google advertiser search with a single REST call. No OAuth, no infrastructure to maintain, and no platform SDKs — send the request, get clean structured JSON back. Pass cache=true to serve from the 24h shared cache (0 credits on hit); default is always fresh.

What you get

Ranked, structured result list
Title, URL, author, and thumbnail per result when available
Engagement metrics where the platform exposes them
Configurable result limit

Try it

Open in Playground

Fill in the parameters below and copy a ready-to-run request, or open the live Playground to run it against your account (no API key paste).

Parameters

q*stringAdvertiser or brand to search for (min 2 characters).countryoptionalstringTwo-letter ISO country code. Default US.limitoptionalintegerMax items to return (default 10, max 50). Billed per result.cacheoptionalbooleanSet true to serve from the 24h response cache. Default false — always fetch fresh data.

API keyoptionalPaste your key to get a ready-to-run snippet. It stays in your browser.Sign in to run live

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_..."

Edit the parameters and the code updates instantly. Switch languages and hit copy.

Example response

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

Billing metadata is returned in response headers: X-Captapi-Credits (credits charged), X-Captapi-Cache (hit or miss), and X-Captapi-Source. Failed requests (4xx/5xx) are never charged. See the full list of error codes in the error reference.

Response structure

A successful call returns success, cached, creditsUsed, and a data object with the following fields:

Top-level fields

queryThe search query you sent.
countryCountry name (e.g. Mexico, United States).
totalReturnedNumber of items returned in this response.

Advertisers

Each item in advertisers contains:

idStable platform ID for the item.
nameName of the item or account.
urlCanonical URL of the item.

Parameters

Name	Type	Required	Description
q	string	Yes	Advertiser or brand to search for (min 2 characters).
country	string	No	Two-letter ISO country code. Default US.
limit	integer	No	Max items to return (default 10, max 50). Billed per result.
cache	boolean	No	Set true to serve from the 24h response cache. Default false — always fetch fresh data.

Authentication: send your key as Authorization: Bearer capt_live_.... A typical call costs 1 credit. Pass cache=true for a free 24h cache hit; default is always fresh.

Using an AI agent? This endpoint is the MCP tool google_ad_library_advertiser_search via @captapi/mcp. Set it up →

How it works

1. Sign up — get 100 free credits, no card required.
2. Create a key from your dashboard.
3. Send one request to /v1/ad-library/google/advertiser-search and parse the JSON response.

Use cases

Trend Discovery

Find trending content by keyword or hashtag.

Content Sourcing

Build feeds and playlists programmatically.

Monitoring

Track topics, brands, and competitors.

Research

Sample large sets of content for analysis.

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.

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