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Exa Web Answer with Citations
x402
Exa Web Answer with Citations is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.07/call, status unknown (last checked 2026-10-10).
Ask a natural language question and receive an AI-generated answer with cited web sources, powered by Exa search via BlockRun
Price / call$0.07
Success—
StatusUnknown
How this service works
Exa Web Answer with Citations: Ask a question and receive an Exa-generated answer with source citations through BlockRun. Query is sent to those providers. Returns retrieval time and source records. Review the answer and citations; this service does not independently verify source claims. 0.07 USDC includes one sourced answer.
Output
Returns an AI-generated answer to the submitted question along with source citations (URL records and retrieval metadata) drawn from Exa's web index. Includes retrieval time and the underlying source records used to construct the answer. Note: the service does not independently verify the accuracy of source claims.
Example use cases
Fact-checking a specific claim
“I've heard that the Great Wall of China is visible from space — can you find me a sourced answer that either confirms or debunks that, with citations to the actual web pages?”
Research briefing with references
“Give me a quick overview of how mRNA vaccines work, and include links to the sources you're drawing from so I can read more.”
Competitive landscape question
“What are the main differences between Stripe and Braintree for payment processing? I want an answer that cites real sources, not just your general knowledge.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-web-answer-with-citations?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a concise AI-generated answer to a factual or research question AND require cited web sources to accompany it — especially when downstream consumers or users need to verify claims. Prefer this over a raw search API when you want a synthesized answer rather than a list of raw results, and over a general LLM when you need grounding in current web content with traceable references. At $0.07 USDC per call it suits low-volume, high-value research queries rather than bulk lookups.
Side effects
- Query too short or empty — rejected by schema validation (minLength:1)
- Query exceeds 500 characters — rejected by schema validation (maxLength:500)
- Exa search returns no relevant results for an obscure or ambiguous query
- Payment of 0.07 USDC not fulfilled — 402 response, no answer returned
- Upstream Exa or BlockRun service unavailability causes timeout or 5xx error
- Answer generated but citations are low-quality or tangentially related to the question
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string |
Tags
x402
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