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Vextorium Extractive Text Summarizer
x402
Vextorium Extractive Text Summarizer is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).
Summarizes text by extracting and returning the most representative original sentences using term-frequency and position scoring, with no AI generation involved.
Price / call$0.003
Success—
StatusUnknown
How this service works
Extractive summary without AI: picks the most representative sentences (term frequency and position scoring) and returns them in original order, with the reduction percentage. Deterministic and instant.
Output
A JSON object containing: the extractive summary as a string of original sentences joined together, the detected language code, the reduction percentage (e.g. 54.3), the number of sentences in the summary, the number of sentences in the original input, and a note clarifying that sentences are copied verbatim from the source.
Example use cases
Compress news article for briefing
“Take this 800-word news article and extract the 4 most representative sentences from it so I can include them in my morning briefing — don't rewrite anything, just pull the actual sentences: [article text here].”
Research digest from academic abstract
“I have a long academic abstract and I need you to pull out the 2 most important original sentences from it — use extractive summarization, not paraphrasing, and tell me what percentage was cut.”
Reduce customer feedback for dashboard
“Here's a block of customer feedback text. Can you extract the 5 most relevant sentences from it without altering any wording, and show me the reduction percentage so I can display it on the dashboard?”
Technical details
Endpoint
POSThttps://api.vextorium.com/resumen-extractivo-pago?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, reproducible text summary that preserves original wording — ideal for pipelines where auditability matters, LLM costs must be avoided, or exact sentence fidelity is required. Prefer this over AI-generative summarizers when you need the same input to always produce the same output, or when paraphrasing or hallucination risk is unacceptable.
Side effects
- Missing 'texto' field returns a validation error
- Text too short to extract the requested number of sentences may return fewer than requested
- Non-JSON body type may cause parse errors if schema mismatch
- Empty string input likely returns an error or empty summary
- Very large text payloads may time out or be rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| texto | string | |
| frases | integer | Sentences to keep (default 5) |
Output
Schema · Response
{
"type": "json",
"example": {
"nota": "Resumen extractivo (copia frases del original, no las reescribe).",
"idioma": "en",
"resumen": "Artificial intelligence agents are transforming the digital economy. The x402 protocol lets agents pay per call without accounts.",
"reduccion_pct": 54.3,
"frases_resumen": 2,
"frases_originales": 5
}
}Tags
x402
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