01 / QUOTE
Inspect actual unpaid HTTP 402
Two fixed live merchant endpoints returned x402 challenges. The app checked chain ID, price, real Circle USDC contract, recipient address, canonical header and EIP-712 token metadata.
READ-ONLY PAYMENT INTELLIGENCE · BASE 8453Verify the quote.
Verify the quote.
Audit the receipt.
Never touch the wallet.
CashGate makes two real Agent-Native tools work in one review interface: inspect an unsigned x402 payment challenge, then independently validate a public Circle USDC receipt. The demo captures actual Chrome interactions, without a connection, approval, purchase or transfer.
Important accounting boundary: The displayed 0.010000 Base USDC transfer was settled before this recording. It is a pre-existing public chain receipt, not income created by this demo. Payment quotes are not sales. This is not a security audit, proof of client delivery or guarantee of earnings.
01 / REAL BROWSER RECORDING
A working application, shown as it ran.
Recorded in an isolated VM3 Chrome session from the real Agent-Native React UI, not a mockup or fabricated transaction sequence. The original application ran on the VM3 loopback development server; it is not claimed to be permanently publicly hosted. English captions describe the visible steps. The video does not use an account, wallet extension, private key or paid settlement.
66.32 seconds · Real Chrome · Read only · Public MP4Direct videoTimestamped action proofTranscript captions
02 / PUBLIC-ONLY REPRODUCIBLE LOGIC
Two actions. One shared user-and-agent interface.
The React controls call the same bounded Agent-Native defineAction() tools that an authorized agent can invoke. There is no purchase API, external arbitrary URL entry or wallet signature route.
02 / RECEIPT
Confirm one historic Base transfer
A pre-existing Base transaction was read by public hash. The app verified the USDC Transfer event, log index 90, recipient, success and canonical block, showing the actual 0.010000 USDC transfer.
03 / CONTROL
Stop at evidence, not payment
No wallet connection, gas, spending or secrets. A valid transfer does not establish the payer's identity, which API was bought, job acceptance or the seller's net profit.
03 / OPTIONAL REAL ORIGINAL MERCHANT APIS
Free proof first. Paid detail only by buyer choice.
The same single-owner merchant runs the original, independently available fixed-route x402 APIs. Each link opens an unsigned HTTP 402 quote and does not spend funds. Any buyer must separately and voluntarily authorize payment in their own payment client.
Aave V3 Base proxy facts
Source-pinned code and EIP-1967 observations
0.010 USDC ↗ BTC/USDT funding comparisonFour public venue quotes; no trading or advice
0.010 USDC ↗ X Layer CPU0 historical diffRead-only twenty-field pinned versus latest state
0.010 USDC ↗ X Layer CPU0 current-state factsBlock-referenced owner, fee, implementation and supply
0.005 USDC ↗04 / SOURCE, OPEN-WORK DISCLOSURE & LIMITS
Audit the implementation, not the marketing.
8 / 8 UNIT TESTS PASSED The original CashGate project uses the MIT-licensed Builder.io Agent-Native Chat template with new purpose-built x402 receipt logic, two shared actions, explicit fail-closed checks and a custom browser-facing workbench developed during October 2026. Existing VM5 merchant APIs and historical payments predate this demo and are explicitly disclosed.
Original application repository: cashgate-x402-defi-evidence. The live app was executed locally on VM3 for verification; only this recording, source, merchant APIs and provenance are public. There is no claim of a hosted authenticated production app, a formal audit, a hackathon submission or a cash prize.
For genuine custom technical work: Request a written, non-custodial scope. Specify deliverables, chain/token, data authority, acceptance and fee terms; never email secrets, bank data, seed phrases or private transaction datasets.