Keyword Gap vs Competitor

x402

Keyword Gap vs Competitor is a paid API for AI agents from seo.openverbs.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Identifies keywords a competitor ranks for that your domain does not, revealing untapped SEO opportunities

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

How this service works

Keyword gap analysis API - find the Google keywords a competitor ranks for that your domain does not, each with the competitor's ranking position and URL plus monthly search volume, CPC, competition, keyword difficulty and search intent. Surfaces content gaps and keyword opportunities for competitive SEO. Empty results if no gap.

Output

A list of keywords (up to the specified limit, default 50) that the competitor domain ranks for in the given language and location but the specified domain does not, enabling identification of SEO content and ranking opportunities.

Example use cases

New content strategy from competitor gaps

“I'm running contentstack.io and want to find keywords that contentful.com ranks for that we're missing — give me the top 50 keyword gaps in English for the US so I can build out a new content plan.”

International market SEO gap discovery

“Compare shopify.com against bigcommerce.com for keyword gaps in the UK market — use language code en and location code 2826, and return up to 200 missing keywords so I can see where Shopify is falling behind.”

Startup benchmarking against category leader

“My site is linear.app and I want to see what keywords notion.com ranks for that we don't — show me the top 50 gaps in English for the US so I understand what content we need to create to compete.”

Technical details

Endpoint

POSThttps://seo.openverbs.com/v1/keyword-gap?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to identify specific keyword opportunities your domain is missing relative to a named competitor, and you want ranked, actionable gap data filtered by language and geography. Prefer this over generic keyword research tools when you have a specific rival in mind and want to prioritize content creation or SEO efforts based on competitive benchmarking.

Side effects

Invalid or unreachable domain/competitor domain returns an error or empty results
Unsupported location code returns an error or defaults unexpectedly
No keyword gap data available for the given domain pair (both may be too small or niche)
Rate limiting or payment failure if USDC balance is insufficient
Language code not matching available data for the location returns sparse results

Input

Schema · Request body

Field	Type	Description
limit	integer	Maximum gap keywords to return. Defaults to 50.
domain	string	Your domain, e.g. yoursite.com (scheme, www and path are stripped).
competitor	string	Competitor domain to compare against, e.g. rival.com.
languageCode	string	Language code (2-letter). Defaults to en.
locationCode	integer	DataForSEO location code. Defaults to 2840 (United States).

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