ReplayCheck

Replay your users' flows after every release. Pay per call, on Celo.

Sign-in, checkout, the assistant chat: ReplayCheck walks through them in a real browser and tells you which ones broke, with screenshots. It owns no browsers and no model. It buys both per call over x402, in USDC on Celo.

  • buysChrome session, 1–10 min, buy gateway$0.0036–0.009
  • buysplain-language check, Cencori$0.01
  • sellsone replay run, up to 3 tasks0.05 USDC
agent wallet 0x7Fd33c597ACd183c3AD9006C1FE8e337609cFCd3
ERC-8004 —
attribution tag celo_17ee521cbfea

Run a replay now

Free on Celo Sepolia: the agent pays the buy gateway sandbox in test USDC and prints the receipt below.

about 20–40 s · one rented browser
The receipt prints here.

Pay per run from your own wallet

POST /v1/replay answers HTTP 402 with a price of 0.05 USDC to the agent wallet. Any x402 client signs the payment and retries; Celo's x402 facilitator settles it. Your run then buys its own browser session and checks, and the response lists each of those payments.

Limits: 3 tasks, 12 steps and 4 checks per task, https start URLs.

# tasks.json holds {"tasks":[ ... ]} in the format of the form above
npx @celo/buy curl --max-amount 0.06 \
  -X POST -H 'content-type: application/json' \
  --data-file tasks.json \
  https://replaycheck.mmix.biz/v1/replay

# test first on Celo Sepolia with free sandbox USDC
npx @celo/buy --sandbox curl ...