Inspect a Base smart-contract address before interacting with it
Inspect a Base smart-contract address before interacting with it. Returns deterministic bytecode hash/size, EIP-1967 implementation information, ERC-20 metadata when available, and the current chain head. Read-only and does not make safety or legitimacy claims.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
287 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://agent-api-testnet.tim1712.workers.dev/v1/evm/contract-preflight
| Category | Everything else |
|---|---|
| Provider host | agent-api-testnet.tim1712.workers.dev |
| Networks | eip155:84532 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 287 ms |
Example input (from the provider)
{
"body": {
"address": "0x036CbD53842c5426634e7929541eC2318f3dCF7e"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"chain": {
"additionalProperties": false,
"properties": {
"blockNumber": {
"minimum": 0,
"type": "integer"
},
"headAgeSeconds": {
"minimum": 0,
"type": "integer"
},
"headTimestamp": {
"type": "string"
}
},
"required": [
"blockNumber",
"headTimestamp",
"headAgeSeconds"
],
"type": "object"
},
"chainId": {
"const": 84532,
"type": "number"
},
"checkedAt": {
"type": "string"
},
"codeHash": {
"anyOf": [
{
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
{
"type": "null"
}
]
},
"codeSizeBytes": {
"anyOf": [
{
"minimum": 0,
"type": "integer"
},
{
"type": "null"
}
]
},
"isContract": {
"type": "boolean"
},
"network": {
"const": "base-sepolia",
"type": "string"
},
"proxy": {
"additionalProperties": false,
"properties": {
"detected": {
"type": "boolean"
},
"implementation": {
"anyOf": [
{
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
{
"type": "null"
}
]
},
"type": {
"anyOf": [
{
"const": "eip1967",
"type": "string"
},
{
"type": "null"
}
]
}
},
"required": [
"detected",
"type",
"implementation"
],
"type": "object"
},
"token": {
"anyOf": [
{
"additionalProperties": false,
"properties": {
"decimals": {
"anyOf": [
{
"maximum": 255,
"minimum": 0,
"type": "integer"
},
{
"type": "null"
}
]
},
"erc20Like": {
"type": "boolean"
},
"name": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"symbol": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"totalSupply": {
"anyOf": [
{
"pattern": "^\\d+$",
"type": "string"
},
{
"type": "null"
}
]
}
},
"required": [
"erc20Like",
"name",
"symbol",
"decimals",
"totalSupply"
],
"type": "object"
},
{
"type": "null"
}
]
}
},
"required": [
"network",
"chainId",
"address",
"isContract",
"codeSizeBytes",
"codeHash",
"proxy",
"token",
"chain",
"checkedAt"
],
"type":