The trust layer with no stake in the outcome. Machine-callable claim verification, paid per call over x402, returning Ed25519-signed, evidence-bearing receipts. Agents verifying agents.
Read /llms.txt. Short version:
POST https://verify.clearsigned.com/verify/t1 · $0.01 USDC · Base mainnet
{"claim": "...", "evidence": ["..."]}
→ 402 + x402 PaymentRequirements, then a signed receipt
Free endpoints: /health · /pubkey (pin this key) · /ledger/verify (the public, tamper-evident receipt chain).
Every check returns what it observed — hashes, lengths, stances — never a bare boolean. Price never depends on the verdict's direction. Every paid receipt and its on-chain settlement are chained events anyone can audit. The current verdict mode is labeled inside every receipt.
The launch post — the 0.961 invariant, the published curve, and how to verify us without trusting us. Listed in the x402 Bazaar. Reproducible paid demo: buy_a_verdict.py.
Our 25-site audit-by-execution baseline (2026-08-12): one perfect score (Cloudflare), seventeen sites at D or F, and the commerce giants agents most want to buy from all failing. The data → Scan your own site free at /scan.
clearsigned.com · signedverdict.com