claim-grounding.prospectintel.workers.dev x402 offerings

$0.05: split any AI answer into checkable claims. Extract claims returns atomic claims with character spans, grounding_required, claim_type (number|date|quantity|quote|named_entity_fact|comparison|opinion|prediction|other) and check_worthiness (high|medium|low). Strips hedges, resolves pronouns across sentences, and splits compound sentences. Up to 3 checkable claims include a next_step: a ready-to-send Quick check ($0.15) request, plus Deep verify ($0.75) and Verify claim ($1.00) bodies. $0.05 USDC.

Verify claim. Checks one factual claim against public sources (Wikipedia) and returns a verdict (supported, contradicted, outdated, mixed or insufficient_evidence) with confidence, a short reason, the quote and source URL, and a receipt. $1.00 USDC.

Check answer. Splits an AI answer into claims and checks each against Wikipedia, Wikidata and (for current claims) news. Returns per-claim verdict, confidence, quote, source URL and sentence, a source-quoted suggested_correction for wrong claims, and an answer summary with problem_sentences. $1.00 USDC.

Deep verify. Use when a claim is high-stakes, or when Check answer or Extract claims marks it unsure (next_step). Checks it against Wikipedia, Wikidata, Google News, Europe PMC studies, FRED economic data and SEC EDGAR filings, and flags contradiction when sources disagree. Async: returns a job_id; poll GET /v1/jobs/{id} free for verdict, evidence for and against, citations. $0.75 USDC.

Deep Research Lite. Re-researches unsupported claims across public sources and returns a receipted result. Requires confirmed: true in the body (otherwise 400, not charged). Async: poll GET /v1/jobs/{id}. $5.00 USDC.

Deep Research Core. Re-researches unsupported claims across public sources and returns per-claim verdicts, evidence URLs and a receipt. Requires confirmed: true in the body (otherwise 400, not charged). Async: poll GET /v1/jobs/{id}. $8.00 USDC.

Deep Research Pro. Highest-budget re-research of unsupported claims across public sources, with per-claim verdicts, evidence URLs and a receipt. Requires confirmed: true in the body (otherwise 400, not charged). Async: poll GET /v1/jobs/{id}. $15.00 USDC.