CITATION VERIFICATION API FOR AI AGENTS

Check whether the cited source supports the sentence.

Send an AI-generated answer and its public source URLs. Receive sentence-level evidence coverage, matched passages, source hashes, and a proof bundle for $0.05 USDC—without an account or API key.

CONTENT SUPPORT, NOT A TRUTH ORACLE

Evidence the next agent can inspect.

SourceMint fetches the supplied pages, extracts substantive claims, maps each claim to the strongest available passage, and flags obvious negation conflicts. It reports insufficient evidence instead of inventing support.

Inspect a sample response →

POST /api/audit-citations
{
  "answer": "A sourced report...",
  "urls": ["https://source.example/article"]
}
01

Before publishing

Audit a generated report so unsupported sentences can be revised or removed.

02

Before acting

Let an agent inspect cited evidence before using a report in a downstream workflow.

03

For provenance

Preserve retrieval timestamps and SHA-256 hashes with the evidence bundle.

FAQ

Know what is—and is not—being verified.

Does SourceMint prove a claim is true?

No. It retrieves and ranks passages from the supplied public sources using transparent lexical matching and negation checks. Buyers should inspect the evidence before high-impact decisions.

Does it verify that an academic paper exists?

Not specifically. SourceMint checks the content of public HTML sources. DOI, journal, and bibliographic-database validation are separate tasks.

What does the citation audit return?

Sentence-level support labels, strongest passages, coverage metrics, source URLs, retrieval timestamps, source hashes, and a combined proof hash.

Does an agent need an account or API key?

No. An unpaid request returns an x402 payment challenge. The agent pays the stated USDC amount on Base and retries the same request.