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citable.run Keyword Research
x402
citable.run Keyword Research is a paid API for AI agents from citable.run, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).
Returns keywords, related questions, and search volume metrics for a given seed keyword in a single API call.
Price / call$0.06
Success—
StatusUnknown
How this service works
Keywords, questions and their numbers for one seed, in a single call.
Output
A list of keywords and related questions derived from the seed, each accompanied by search volume numbers and other metrics, returned in a single structured response. The result set size is controlled by the limit parameter (1–200 rows per list, default 100).
Example use cases
Content calendar topic discovery
“I'm building a content calendar for a SaaS startup. Can you research the seed keyword 'CRM software' in English for the US market and give me the top 100 related keywords and questions with their search volumes?”
International SEO expansion
“We're expanding our site into France — can you look up keywords and questions for the seed 'gestion de projet' in French (lang: fr, country: fr) with up to 200 results so we can plan our French content?”
Blog post ideation for niche topic
“I want to write a blog post about 'sourdough starter'. Can you fetch all the related keywords and questions people search for around that seed, in English for the US, so I know what subtopics to cover?”
Technical details
Endpoint
GEThttps://citable.run/v1/keyword-researchWhen to prefer
Choose this endpoint when you need keyword volume data, related keyword expansions, and People Also Ask-style questions all in a single call for a given seed term. It is ideal for SEO content planning, topic discovery, and international keyword research where you need both head terms and question variants with their search numbers. Prefer this over a full SERP scrape when you want structured keyword metrics rather than raw search result pages.
Side effects
- Missing required 'seed' query parameter returns an error
- Seed keyword exceeding 80 characters is rejected
- Invalid language or country code may return no results or an error
- Limit value outside 1–200 range may be clamped or rejected
- Payment failure (x402) if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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