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Document Answer with Verified Quotes
x402
Document Answer with Verified Quotes is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).
Answers a question grounded in up to three supplied text passages and returns exact supporting quotes verified to exist in the input.
Price / call$0.01
Success—
StatusUnknown
How this service works
Document Answer with Verified Quotes: Answer a question using up to three short supplied passages and include exact supporting quotes. Quote existence is checked; answer entailment still requires review. No web search. 0.01 USDC includes one question with up to 3 passages.
Output
A direct answer to the submitted question, derived solely from the provided passages, along with exact verbatim quotes from those passages that support the answer. Quote existence within the supplied text is verified; entailment quality may still vary.
Example use cases
Policy document Q&A with citations
“I have these two policy snippets: 'All returns must be initiated within 14 days of delivery.' and 'Items must be unused and in original packaging.' Can you answer the question 'How do I return an item?' using only those passages and give me the exact quotes that support the answer?”
Contract clause verification
“Here are two contract clauses: 'Payment is due within 30 days of invoice.' and 'Late payments accrue 1.5% interest per month.' Answer the question 'What happens if I pay late?' using only those passages and show me the exact supporting quotes.”
Employee handbook FAQ grounding
“Using only this passage — 'Employees are entitled to 15 days of paid vacation annually. Unused vacation may be carried over up to a maximum of 5 days.' — answer 'How much vacation time do employees get?' and include the exact quote from the text that supports your answer.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-grounded-document-answer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a grounded, citation-backed answer derived strictly from text you supply, not from web search or model training knowledge. It is ideal for document QA, contract review, policy interpretation, or any task where auditability and exact sourcing matter. Prefer it over general-purpose LLMs when you need quote verification and a closed-context guarantee. It is not suitable for open-domain questions requiring web retrieval.
Side effects
- Question not answerable from supplied passages — model may indicate insufficient information
- Passage too long — each passage is capped at 400 characters, longer inputs will be rejected
- More than 3 passages submitted — array is limited to maxItems 3
- Empty question or passage — minLength 1 enforced on both fields
- Payment failure — x402 payment of 0.01 USDC required per call
- Hallucinated quote — entailment accuracy is not fully guaranteed, only quote existence is checked
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| question | string | |
| documents | array |
Tags
x402
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