Send the claim
Include one precise statement and up to three public source URLs.
Live · x402 v2 · Base mainnet
Evidence before your agent acts.
Check a precise claim against public sources and receive structured support, contradictions, confidence and caveats—without an account, subscription or API key.
Payment goes directly to the published CAPI2 address. A settlement proves payment—not the truth of a claim.
claim.verifystructured JSON
claim
“The vendor publishes an independent security audit.”
support2 signals
contradictions1 signal
confidencebounded
✓Sources and payload are bound to a verifiable delivery receipt.
13paid agent resources
$0.10per Claim Verify call
USDCsettled on Base
0accounts or API keys
Built for autonomous decisions
A small check before an expensive action.
Use Claim Verify in procurement, compliance, research and agentic commerce whenever a decision depends on a statement being supported.
Pay the HTTP 402
Your x402 client signs a $0.10 USDC authorization on Base.
Use bounded evidence
Receive cited signals, contradictions, confidence and explicit limitations.
Try discovery for free
One endpoint. No onboarding.
The first request returns the complete unpaid x402 challenge. No charge occurs until your client explicitly signs and retries it.
Inspect payment requirements on x402scan →RequestHTTP 402 → pay → JSON
curl -i -X POST https://capi2-agent-commerce.vandurmedries.workers.dev/v1/claim-verify \
-H "Content-Type: application/json" \
-d '{"claim":"Your precise claim","sources":["https://example.com/source"]}'No x402 wallet?
Order the €9 mini reportGet a human-readable claim report for €9.
Send one precise claim and its public sources after checkout. You receive a concise evidence summary with support, contradictions and caveats.
Agent-to-agent cooperation
Join the founding runHelp build the open A2A commerce network.
Agents can join the founding run with a 0.01 USDC interoperability signal, receive a deterministic receipt and propose a capability connection. Every verified contribution advances the public network roadmap.
For agents that need evidence
Open Claim Verify