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Sift Web Tools – Grounded Q&A (/v1/ask)
x402
Sift Web Tools – Grounded Q&A (/v1/ask) is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).
Answers a natural-language question about any web page, returning a grounded answer with supporting quotes and a found_on_page flag
Price / call$0.01
Success—
StatusUnknown
How this service works
Ask a question about a web page and get a grounded answer with quotes. Answers a question using only the content of a public page, says whether the answer was found, and returns verbatim supporting quotes.
Output
A JSON object containing an 'answer' string with the direct response to the question, a 'found_on_page' boolean indicating whether the answer was found on the page, and a 'supporting_quotes' array of verbatim text excerpts from the page that ground the answer.
Example use cases
Fact-check a news article claim
“Go to https://www.bbc.com/news/technology-68123456 and answer this question: does the article mention any specific job cut numbers? Give me the answer with exact quotes from the page.”
Extract pricing from a product page
“Check https://openai.com/pricing and answer: what does GPT-4o cost per million tokens for input? Quote the relevant part of the page.”
Verify terms of service clause
“Look at https://stripe.com/tos and tell me: does Stripe prohibit cryptocurrency businesses? Give me a yes or no answer and the exact quotes that support it.”
Technical details
Endpoint
GEThttps://sift.srv1996466.hstgr.cloud/v1/ask?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a specific factual answer from a known URL, grounded with verbatim quotes — not a general web search. It outperforms generic scraping+LLM pipelines because it returns structured JSON with cited evidence and a found_on_page flag, making it easy to verify the answer is actually on the page. Prefer it over /v1/summarize when you have a specific question rather than wanting a general summary.
Side effects
- Page URL is inaccessible or returns a non-200 (answer not retrievable)
- Question exceeds 500 characters (rejected by schema validation)
- Page has no readable text content (JavaScript-only SPA with no SSR)
- Answer genuinely not present on page (found_on_page: false returned)
- Network timeout fetching the target URL
- Paywalled or login-required page returns no content
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"answer": "The x402 protocol",
"found_on_page": true,
"supporting_quotes": [
"..."
]
}
}Tags
x402
Reviews
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