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Topic Scorer – Taxonomy Rank Gate
x402
Topic Scorer – Taxonomy Rank Gate is a paid API for AI agents from topic-scorer.pixelcove.co, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Checks whether a piece of text ranks within the top N categories of a given ad or content taxonomy, returning pass/fail, rank, gap to #1, top 5 categories, and unused phrases to improve topical coverage.
Price / call$0.05
Success—
StatusUnknown
How this service works
Pass/fail check: does the text rank within the top `min_rank` categories of its target taxonomy? Returns `pass`, the target's rank and gap to #1, the taxonomy's top five, and the unused phrases to work in. Use it as a content-pipeline gate. Paid, $0.05/call; read-only and safe to retry.
Output
Returns a pass/fail verdict indicating whether the text ranks within the specified top-N threshold for the target category, the target category's actual rank, its scoring gap to the #1 ranked category, the taxonomy's top 5 scoring categories for the text, and a bank of unused topically-relevant phrases that could be incorporated to improve ranking.
Example use cases
Content pipeline gate before publish
“Before I publish this blog post, check if it ranks in the top 3 of the IAB content taxonomy for the category 'Health & Fitness > Exercise' — use the full text scoring mode and give me the unused phrases I should work in.”
Ad copy taxonomy compliance check
“Does this Google Ads landing page copy qualify as top-5 in the 'google_ads_topics' taxonomy under 'Autos & Vehicles > Motor Vehicles > Cars & Trucks'? Here's the full text — tell me the rank, the gap to #1, and the top 5 categories it scores for.”
LinkedIn content industry alignment
“Score this LinkedIn article against the 'linkedin_industries' taxonomy for the 'Information Technology & Services' category — I want to know if it passes a top-2 rank threshold and what phrases I should add to improve it.”
Technical details
Endpoint
POSThttps://topic-scorer.pixelcove.co/v1/gateWhen to prefer
Use this endpoint when you need a deterministic pass/fail gate on whether content is topically aligned with a specific category in a standardized ad or content taxonomy (IAB, Google Ads, Google Merchant, LinkedIn Industries). It is particularly valuable in automated content pipelines where you need a hard threshold check before publishing, submitting ads, or approving content. Prefer this over general-purpose LLM classification when you need reproducible, taxonomy-anchored results with improvement guidance (unused phrases) and ranking context (top 5, gap to #1).
Side effects
- Category not found or ambiguous path substring — use topic_scorer_find to look up a valid category id
- Text too short (under 1 character) or too long (over 32,768 characters)
- Invalid taxonomy enum value supplied
- min_rank out of bounds (must be 1–50)
- Payment failure or insufficient funds — $0.05 USDC required per call
- Service unavailable or timeout on large full-text scoring requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| full | boolean | Score the whole text as the mean of 8,192-char chunks instead of only the first 8,192 chars. |
| text | string | The page or draft text to score, as plain text or HTML (tags are stripped). 1 to 32768 characters. URLs are not fetched; send the content. |
| phrases | integer | Phrase bank size for the target category (0 skips it). |
| category | string | Target category id, full path, or a unique path substring within the taxonomy (use topic_scorer_find to look one up). |
| min_rank | integer | Highest passing rank. |
| taxonomy | string | Taxonomy of the target category. |
Tags
x402
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