# Search Google advertisers > Find an advertiser's Google Ads id by brand name, with how many ads they run, plus matching websites. - **Request:** `GET https://api.lurkapi.com/v1/google/adLibrary/advertisers/search` - **Auth:** `x-api-key` header ([get a free key](https://lurkapi.com/login?next=/dashboard)) - **Cost:** 1 credit per call. Validation errors, `401`/`402`/`429` rejections and `5xx` failures are free; `not_found` is charged ([how charging works](https://lurkapi.com/docs.md#credits)). - **MCP tool:** `google_search_advertisers` on `https://api.lurkapi.com/mcp` - **Freshness:** responses are cached for up to 1 day - **Try it live:** https://lurkapi.com/docs/google/search-advertisers#try (no signup) - **Platform:** [Google](https://lurkapi.com/docs/google.md) (adstransparency.google.com) - **Web page:** https://lurkapi.com/docs/google/search-advertisers ## When to use this Use it to turn a brand name into the `advertiser_id` that company ads (google_company_ads) needs, or to find the website to pass as `domain`. Big brands have one advertiser per country or agency; pick by `region` and `number_of_ads_estimate`. The same suggestions as the search box on adstransparency.google.com: up to 10 advertisers and 10 websites, no pagination. `region` (default US) counts only ads shown there, so the list changes by region; pass ALL for every region. ## Parameters All parameters go in the query string. | Name | Type | Required | Default | Allowed values | Description | Example | | --- | --- | --- | --- | --- | --- | --- | | `query` | string | yes | | | Brand or advertiser name, e.g. `nike`. | `nike` | | `region` | string | no | `US` | | Count only ads shown in this country: a 2-letter code (US, GB, DE…), or ALL for anywhere. | | ## Example request Replace `YOUR_API_KEY` with your key, or set `LURKAPI_KEY` for the code. [Get a free key](https://lurkapi.com/login?next=/dashboard). curl: ```bash curl "https://api.lurkapi.com/v1/google/adLibrary/advertisers/search?query=nike" \ -H "x-api-key: YOUR_API_KEY" ``` JavaScript: ```js const params = new URLSearchParams({ query: "nike", }); const res = await fetch(`https://api.lurkapi.com/v1/google/adLibrary/advertisers/search?${params}`, { headers: { "x-api-key": process.env.LURKAPI_KEY }, }); const data = await res.json(); if (!data.success) throw new Error(`${data.code}: ${data.error}`); console.log(data.advertisers); ``` Python: ```python import os import requests res = requests.get( "https://api.lurkapi.com/v1/google/adLibrary/advertisers/search", params={ "query": "nike", }, headers={"x-api-key": os.environ["LURKAPI_KEY"]}, timeout=60, ) data = res.json() if not data["success"]: raise RuntimeError(f"{data['code']}: {data['error']}") print(data["advertisers"]) ``` ## Example response A real response from this endpoint, captured from the live API and trimmed to a couple of items. Strings over 96 characters (mostly signed media URLs) are cut short and end in `…`. 200 OK (application/json): ```json { "success": true, "credits_remaining": 999999, "credits_charged": 1, "advertisers": [ { "name": "Nike, Inc.", "advertiser_id": "AR16735076323512287233", "region": "US", "number_of_ads_estimate": 8000, "number_of_ads_range": { "min": 8000, "max": 9000 }, "is_verified": true }, { "name": "NIKE SRL", "advertiser_id": "AR17365672681860497409", "region": "IT", "number_of_ads_estimate": 1, "number_of_ads_range": { "min": 1, "max": 1 }, "is_verified": true } ], "websites": [ { "domain": "nike.com" }, { "domain": "nike.cl" } ] } ``` ## Response fields Every field of a successful response. `[]` marks a list: `a[].b` is the `b` of each item in `a`. **nullable** fields can be `null`; **optional** fields can be missing. | Field | Type | Description | | --- | --- | --- | | `success` | `true` | Always true here; errors have `success: false`. | | `credits_remaining` | `number` | Your balance after this call. On anonymous playground calls: free tries left today. | | `credits_charged` | `number` | Credits this call cost; 0 on free endpoints. On anonymous playground calls: tries used (1). | | `advertisers` | `object[]` | Matching advertisers, best match first. | | `advertisers[].name` | `string` | The advertiser's verified name, e.g. `Nike, Inc.`. | | `advertisers[].advertiser_id` | `string` | The advertiser's id (`AR…`). Pass it as `advertiser_id` to company ads. | | `advertisers[].region` | `string`, nullable | Country the advertiser is based in, as a 2-letter code. | | `advertisers[].number_of_ads_estimate` | `number`, nullable | How many ads they have in `region`: the lower end of Google's range (exact for small advertisers). | | `advertisers[].number_of_ads_range` | `object`, nullable | The ad count as the range Google shows, e.g. 9000–10000; null when it gives none. | | `advertisers[].number_of_ads_range.min` | `number` | Lower bound of the ad count. | | `advertisers[].number_of_ads_range.max` | `number` | Upper bound of the ad count. | | `advertisers[].is_verified` | `boolean` | false when Google marks the advertiser as not yet verified. | | `websites` | `object[]` | Websites matching the query. | | `websites[].domain` | `string` | A website with ads, e.g. `nike.com`. Pass it as `domain` to company ads. | ## Caching and freshness Responses are cached for up to 1 day, so a repeat call within that window can return the same data. It still costs 1 credit. ## Errors Errors return `{ success: false, error, code, docs }` with the HTTP status below. Validation errors, `401`/`402`/`429` rejections and `5xx` failures are free; `not_found` is charged ([how charging works](https://lurkapi.com/docs.md#credits)). [All error codes](https://lurkapi.com/docs.md#errors). | Status | Code | Meaning | | --- | --- | --- | | 401 | `missing_api_key` | No API key. Send it in the `x-api-key` header. | | 401 | `invalid_api_key` | The key is unknown or was revoked. | | 402 | `insufficient_credits` | Not enough credits for this call. Buy a pack or wait for tomorrow's top-up. | | 405 | `method_not_allowed` | Endpoints take GET with query params. | | 429 | `rate_limited` | Too many calls at once. Wait for the `retry-after` seconds, then retry. | | 500 | `internal_error` | Something broke on our side. Retry; 5xx errors are free. | | 502 | `upstream_error` | The platform didn't give a usable answer. Retry; 5xx errors are free. | | 503 | `upstream_busy` | All our connections to the platform are busy. Retry in a few seconds; 5xx errors are free. | | 504 | `upstream_timeout` | The platform took over 30 seconds to answer. Retry; timeouts are free. | ## Use it in Claude Once LurkAPI is [connected to Claude](https://lurkapi.com/docs.md#claude), this endpoint is the `google_search_advertisers` tool. Ask in plain English, for example: Ask Claude: ```text Use LurkAPI's google_search_advertisers with query "nike" and summarize what you find. ``` Claude calls `google_search_advertisers` with arguments like these, and each call costs 1 credit: Tool arguments: ```json { "query": "nike" } ``` Tool results skip nulls and empty lists to save tokens. --- Previous: [TikTok Shop product](https://lurkapi.com/docs/tiktok/product.md) · Next: [Google ads by company](https://lurkapi.com/docs/google/company-ads.md)