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StillCurrent Citation Check API
x402
StillCurrent Citation Check API is a paid API for AI agents from stillcurrent.something-agent.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-28).
Verifies whether a cited URL is live and current, and whether a quoted sentence or paraphrased claim still appears on the referenced page, with archive.org fallback.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call checks that tell you whether a source is still current: link liveness and staleness, and whether a quoted sentence or claim still appears on the cited page (with archive.org fallback).
Output
A JSON object with a top-level verdict (e.g. 'matched', 'partially_matched', 'not_found', 'link_dead') indicating the overall result, plus a claim_match object detailing whether key terms and numbers from the claim or quote were found on the live or archived page, including lists of numbers found and missing.
Example use cases
Fact-check a statistic before publishing
“Before I publish this article, check if the claim 'global EV sales grew by 78.4% in 2023' is still supported on https://iea.org/reports/ev-outlook — and if the page has changed or removed it, check archive.org too.”
Validate academic citation in a paper
“I'm citing https://journals.example.com/article/42 with the quote 'patients in the control group showed no significant improvement'. Can you verify the link is still live and that exact quote is still on the page?”
Monitor source freshness for a report
“Check if https://worldbank.org/data/gdp-report is still current — it shouldn't be older than 180 days — and confirm the claim 'developing economies account for 60% of global growth' is still there.”
Technical details
Endpoint
POSThttps://stillcurrent.something-agent.workers.dev/check/citation?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to confirm that a specific citation, quote, or statistical claim still exists on a referenced web page — especially for research, journalism, or automated fact-checking pipelines. It is the right choice when you need both link liveness and content presence verified together, with automatic archive.org fallback for pages that have changed. Prefer it over generic link checkers when the textual accuracy of the cited content matters, not just HTTP reachability.
Side effects
- URL is unreachable or returns non-200 status — link declared dead
- Page content is behind a paywall or login — content cannot be verified
- Quote or claim is too vague to match lexically — returns low-confidence or not-found verdict
- archive.org has no snapshot for the URL — archive fallback unavailable
- PDF parsing failure for non-HTML content — partial or failed content extraction
- Claim contains numbers that have been updated on the page — partial_match with missing numbers reported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Absolute http(s) URL of the cited page (HTML, PDF or plain text). |
| claim | — | Paraphrased claim attributed to the source. Checked lexically: key terms and every number must appear near each other. |
| quote | — | Exact text the citation quotes. Matched exactly, then punctuation-insensitive, then fuzzy. |
| stale_after_days | integer | |
| check_archive_if_missing | boolean | If not found on the live page, also search the latest archive.org snapshot. |
Output
Schema · Response
{
"type": "json",
"example": {
"verdict": "partially_matched",
"claim_match": {
"verdict": "partially_supported_lexically",
"numbers_found_on_page": [],
"numbers_missing_from_page": [
"78.4"
]
}
}
}Tags
x402
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