Base mainnetx402 v2$0.01 USDC

Base Transaction Evidence Oracle

Verify what an on-chain agent actually executed. Submit a Base transaction hash and optional expectations. The service checks canonical chain data and returns a deterministic Ed25519-signed evidence receipt.

Checks

• Canonical transaction, receipt, and block identity
• Success or revert status
• Expected sender, recipient, and four-byte method selector
• Required confirmation depth

Paid endpoint

POST /v1/verify/base-transaction is protected by x402 and costs $0.01 in native Base USDC. PayAI verifies and settles the payment; an absolute local hard stop disables the endpoint after 1,000 settled calls so it cannot cross into paid facilitator usage.

{
  "transactionHash": "0xbf9166018c39a318480f15cb8f33c13a47655d47670bd15ca484a0ec3443574d",
  "expectations": {
    "status": "success",
    "minConfirmations": 5
  }
}

Evidence

• Public pass receipt
• Receipt verification key
• OpenAPI 3.1 contract
• Health status

A receipt proves the chain state observed at its issue time. Consumers should enforce the confirmation threshold appropriate to their own risk.