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Api Endpoint

TraceFast

TraceFast live Ethereum data: the 4-byte function selectors found in a contract's bytecode, each resolved to a known signature and name where one exists, with how many known signatures share the selector. `decodeStatus` says how confident each resolution is. Path address: The contract address, `0x`-prefixed, 40 hex characters, any case. Docs: https://docs.tracefast.xyz/api/contract-selectors.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/contracts/:address/selectors
MIME type
application/json
First seen
2026-10-16T01:52:13.818Z
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
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x2A65491E93Ad0d484b74405401A38e2E0E5EDd7e"
  }
]

Observed health

Status
Healthy
Latest latency
222 ms
Average latency
593 ms
HTTP status
402
Last checked
Reachability
100% over 14 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": {
    "address": "0xdac17f958d2ee523a2206206994597c13d831ec7"
  },
  "queryParams": {},
  "type": "http"
}

Output schema

{
  "type": "json",
  "example": {
    "data": {
      "chainId": 1,
      "address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "codeHash": "0xb44fb4e949d0f78f87f79ee46428f23a2a5713ce6fc6e0beb3dda78c2ac1ea55",
      "selectorCount": 36,
      "selectors": [
        {
          "selector": "0x8456cb59",
          "signature": "pause()",
          "name": "pause",
          "candidateCount": 1,
          "decodeStatus": "partial"
        }
      ]
    }
  }
}