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SpyFu Most Valuable Keywords via Sponge
x402
SpyFu Most Valuable Keywords via Sponge is a paid API for AI agents from spyfu.x402.paysponge.com, paid per call via x402, $0.010000/call, status down (last checked 2026-09-15).
Returns the most valuable SEO keywords for a domain based on traffic and ranking value, sourced from SpyFu via the Sponge x402 payment proxy
Price / call$0.010000
Success—
StatusDown
How this service works
GET /apis/serp_api/v2/seo/getMostValuableKeywords
Output
A list of the most valuable SEO keywords associated with the queried domain, including metrics such as estimated monthly search volume, ranking position, traffic value, and keyword competitiveness as provided by SpyFu data.
Example use cases
Competitor keyword gap analysis
“Can you pull up the most valuable SEO keywords for hubspot.com? I want to understand which high-value organic keywords they're ranking for so I can figure out where my own site has gaps to exploit.”
Content strategy prioritization
“I'm planning our blog content calendar for next quarter. Can you get me the top SEO keywords driving the most organic value for our site, shopify.com, so I know which topics to prioritize first?”
New niche market research
“I'm thinking about entering the personal finance space and want to understand the landscape. Can you show me the most valuable SEO keywords for nerdwallet.com so I can see what's actually worth targeting in that niche?”
Technical details
Endpoint
GEThttps://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getMostValuableKeywordsWhen to prefer
Use this endpoint when you need to identify the highest-value organic SEO keywords for a specific domain — especially for competitive research, content strategy, or SEO prioritization. Prefer this over general SERP analysis endpoints when you want a ranked, value-weighted list specifically curated by SpyFu's scoring model rather than raw SERP data.
Side effects
- Missing or invalid domain query parameter returns an error or empty result
- Payment failure via x402 protocol returns 402 status with no data
- Domain not found in SpyFu database returns empty keyword list
- Rate limiting or quota exceeded returns 429 or error response
- Malformed query parameters return 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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