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Checked data for AI agents. Pay per call.

Transaction explanations, DeFi yields, new-token safety checks, SEC company events and sanctions screening. No account, no API key. Each answer costs a few cents in USDC.

Try a service For developers
From $0.03 per callUSDC on BaseNever charged for errors
Real example · Sanctions screening$0.05
GET api.checkpoint402.com/v1/sanctions-screen
    ?address=0x098B…2f96

→ 200 OK
{
  "result": "POTENTIAL_MATCH",
  "name": "LAZARUS GROUP",
  "type": "entity",
  "programs": ["DPRK3"],
"list": "US Treasury OFAC SDN · 19,416 entries"
}

Five services. One simple price each.

Every answer is built from named public sources and returned as clean JSON, with a plain-English summary where it helps.

$0.03

Transaction Explainer

Any Base or Ethereum transaction in plain English: who sent what to whom, tokens moved, success and fee.

Source: On-chain dataDetails →

$0.05

Best DeFi Yield Finder

Top yields across 16,000+ pools, filtered by asset, chain and size, each with a clearly explained risk level.

Source: DefiLlamaDetails →

$0.10

New Token Safety Feed

Newly launched tokens with a 0–100 safety score and red flags: honeypots, unverified code, unlocked liquidity.

Source: GeckoTerminal + GoPlus SecurityDetails →

$0.10

Company Events (SEC 8-K)

New company filings within minutes: CEO changes, earnings, deals, with a short summary of what happened.

Source: SEC EDGARDetails →

$0.05

Sanctions Screening

Check a name or crypto wallet against the US sanctions list, including alternate names and 1,000+ listed wallets.

Source: US Treasury OFAC SDN listDetails →

More coming

New services are added based on what agents actually ask for. Suggest one.

How it works

  1. 01AskSend a request: a wallet, a ticker, a transaction. You see the price before anything is paid.
  2. 02Pay a few centsApprove the payment in your wallet, or let your AI agent pay automatically. USDC on Base, straight to us.
  3. 03Get the answerThe result arrives in seconds. If anything fails on our side, the payment never goes through.

Built for AI agents

Checkpoint402 speaks x402, the open payment standard for the web. Any x402-capable agent can discover a service, see its price and pay. No signup, no keys, no monthly plan.

Read the developer guide →
// pays automatically, only if the call succeeds
const fetchPaid = wrapFetchWithPayment(fetch, client);

const res = await fetchPaid(
  "https://api.checkpoint402.com/v1/company-events?ticker=AAPL"
);
console.log(await res.json());

Why you can trust the answers

Named sources

SEC, US Treasury, DefiLlama, GoPlus, GeckoTerminal and the blockchain itself. Every answer says where it came from.

Never charged for errors

Bad input or a source outage returns an error and the payment is cancelled automatically.

No accounts, no profiles

No sign-up and no personal data. Our records keep which service was paid for, not what you asked.

Honest limits

Fast, informational data. Not financial or legal advice, and never a replacement for an audit.

See it work for 3 cents.

Connect a wallet, pick a service and get a real answer. No account needed.

Try a service