Pitcrew

Free tools for when something breaks on-chain or on the web. No sign-up, no wallet.

Failed or stuck transaction? Paste the hash into the free checker: pitcrew-api.appin60.com/app (20 free checks a day). Data: why 3,146 Ethereum and Base transactions failed.

Free tools

Why did my transaction fail? Decoded method, revert reason (error strings, panic codes, custom errors resolved by signature), gas used vs limit, fee, token transfers and a plain-language fix. Stuck transactions get a nonce-gap and fee diagnosis with the replace/cancel recipe. Ethereum, Base, Arbitrum, Optimism, Polygon, BSC.
x402 origin audit. Why does x402scan or the CDP Bazaar skip my routes? Reads your OpenAPI file like the indexers do and probes every paid route unpaid with your own examples. 3 a day.
x402 endpoint preflight. Valid 402 challenge? Which networks, tokens and USD price? Amount errors, testnet-only offers, bad payTo, missing Bazaar schema.
Is it up? HTTP status, redirect chain, latency, TLS validity and days to expiry, security headers, MX records.
Domain lookup. Registrar, age, expiry, DNS records, SPF and DMARC policy.
What is this address? EOA, contract or EIP-7702 delegated account on six EVM chains, with balances.

Up to 20 checks a day per visitor, all tools together.

Example: a real failed Base transaction

GET https://pitcrew-api.appin60.com/tx/explain?chain=base&hash=0x19149f9b44efbe36f2180fda8389d811ff2de968f3391190f7544e0a55ccf8f9

{
 "status": "failed",
 "method": "submitRecord(uint256,uint256,uint256,uint256,bytes)",
 "gas": { "used": "28490", "limit": "500000", "usedPct": 5.69 },
 "revert": {
  "kind": "custom error",
  "selector": "0x41855d4d",
  "signature": "RecordAlreadyExists(uint256)",
  "replayedAgainstBlock": 52543853
 },
 "summary": "Failed calling submitRecord(...): custom error RecordAlreadyExists(uint256)."
}

For AI agents: x402 API, priced per call

The same tools are an HTTP API for AI agents. No signup, no API key: your agent pays per call with x402 in USDC on Base or Arbitrum.

Route	What you get	Price
`GET /tx/explain?chain=&hash=`	Why a transaction failed or is stuck, with the fix.	$0.01
`GET /x402/audit?origin=`	Every listing problem on an x402 seller origin.	$0.02
`GET /x402/preflight?url=`	Check an x402 endpoint before paying it.	$0.005
`GET /site/check?url=`	Website health: status, TLS, redirects, latency.	$0.005
`GET /domain/lookup?domain=`	Registrar, age, expiry, DNS, SPF and DMARC.	$0.005
`GET /evm/address?address=`	EOA, contract or EIP-7702 account on six chains.	$0.005
`GET /fetch?url=`	A web page as clean text.	$0.005

Bad input (unknown chain, malformed hash, unreachable URL) is rejected with a 4xx before payment settles, so you are never charged for it. Payment: x402 v2 exact scheme through the Coinbase CDP facilitator, USDC on Base (eip155:8453) or Arbitrum One (eip155:42161), to 0xB442daCAE60C07bb5dB8f33C8a6c1572d8F24e83.

# any x402 client, e.g. the x402 fetch wrapper or AgentCash
npx agentcash fetch "https://pitcrew-api.appin60.com/tx/explain?chain=base&hash=0x..."

Docs: llms.txt · openapi.json · /.well-known/x402 · public settlement log: /stats

Contact

Need a tool that isn't here? pitcrew@appin60.com

Pitcrew is an independent project, not affiliated with Coinbase or x402.org. Results come from public RPC data and public signature databases; a revert replay against the previous block can differ from the original execution when earlier transactions in the same block changed state, and the response says so when that happens.