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SpyFu Also-Buys Ads for Keywords
x402
SpyFu Also-Buys Ads for Keywords is a paid API for AI agents from spyfu.x402.paysponge.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).
Returns keywords for which advertisers who buy ads on a given keyword also purchase paid search ads, revealing co-purchased ad keyword clusters.
Price / call$0.01
Success—
StatusDown
How this service works
GET /apis/keyword_api/v2/related/getAlsoBuysAdsForKeywords
Output
A list of keywords that advertisers co-purchase alongside the queried keyword in paid search (Google Ads), effectively revealing keyword clusters and advertiser buying behavior patterns for PPC campaign expansion and competitive research.
Example use cases
Example prompt
“Using SpyFu's also-buys ads data, show me which other keywords advertisers tend to buy paid search ads on when they're already bidding on 'project management software'.”
Technical details
Endpoint
GEThttps://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getAlsoBuysAdsForKeywordsWhen to prefer
Choose this endpoint when you need to discover which keywords are co-purchased by advertisers alongside a target keyword in paid search — ideal for PPC keyword expansion, building ad groups, or understanding how competitors cluster their keyword buys. Prefer this over organic/SEO keyword tools when the focus is specifically on paid advertising behavior.
Side effects
- Missing or invalid keyword input returns an empty result or error
- Keyword with no ad history returns an empty also-buys list
- Rate limiting or payment failure (x402) returns a 402 Payment Required response
- Keyword not in SpyFu database returns null or empty dataset
- Malformed query parameters return a 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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