Index onlineMerchant portal
Api Endpoint

TraceFast

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

Open interactive test console

Offering

Provider
mpp.tracefast.xyz
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash/storage-writes
MIME type
application/json
First seen
2026-10-16T01:52:52.778Z
Last seen
Tags
blockchain, Ethereum, address-intelligence, labels, entities

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.1 USDC
Atomic price: 100000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "100000",
    "payTo": "0x2A65491E93Ad0d484b74405401A38e2E0E5EDd7e"
  }
]

Observed health

Status
Healthy
Latest latency
237 ms
Average latency
430 ms
HTTP status
402
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "method": "GET",
  "pathParams": {
    "hash": "0x0e646d1b52758cafe4eca236972927be572053491217fa08751d3958a1e30f0a"
  },
  "queryParams": {
    "limit": "10"
  },
  "type": "http"
}

Output schema

{
  "type": "json",
  "example": {
    "data": {
      "hash": "0x0e646d1b52758cafe4eca236972927be572053491217fa08751d3958a1e30f0a",
      "blockNumber": 25000000,
      "txIndex": 0,
      "writes": [
        {
          "writeIndex": 0,
          "writeIndexStatus": "present",
          "storageAddress": "0x681e908b8ab57c49c74d770f369754ccc3e1ae09",
          "executionAddress": "0x681e908b8ab57c49c74d770f369754ccc3e1ae09",
          "callerAddress": "0x9f59a6cc9538d4764cabde4ccaf6d02c8e8dddd6",
          "storageKey": "0xb973b814a43ee884f5bfb5464036c9b3d9e4c942000000000000000000000000",
          "newValue": "0x870b0fac41005ea73425300005f5af8b070066a977bb120000019de3718f4200",
          "valueBefore": "0x870b43983c005ea7b1d72f0005f5af8b070066a96fd1190000019de3715c5a00",
          "valueBeforeStatus": "resolved",
          "callPath": "0000",
          "callDepth": 1,
          "callType": "call"
        }
      ],
      "writesTruncated": false
    }
  }
}