TraceFast
GET https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash/storage-writes
TraceFast live Ethereum data: every contract storage slot a transaction wrote, in execution order — which contract's storage, which frame wrote it (with the address whose code ran, which on a `delegatecall` is not the storage owner), the slot, the value written, and the value the slot held before where that can be established. Path: hash. Query: limit, cursor (see docs). Docs: https://docs.tracefast.xyz/api/transaction-storage-writes.md
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash/storage-writes"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 07:01 | Valid 402 | 402 | 1069 ms | $0.2 |
| 2026-10-11 02:45 | Valid 402 | 402 | 1945 ms | $0.2 |
| 2026-10-10 22:15 | Valid 402 | 402 | 715 ms | $0.2 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves