Check before you pay or trade
Check before you pay or trade: pass / review / block for one wallet or contract address (EVM chains, Solana). Use it before you pay, trade with or approve an address: one cheap call returns pass, review or block with the reasons and the list dates.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
263 msmedian answer time
$0.01listed price per call
$0.01price 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://twin.unykorn.org/check/address
| Category | Market data |
|---|---|
| Provider host | twin.unykorn.org |
| Networks | eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.01 | 263 ms |
Example input (from the provider)
{
"body": {
"params": {
"chain": "base",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"body": {
"properties": {
"params": {
"additionalProperties": false,
"properties": {
"address": {
"deprecated": true,
"description": "deprecated alias of value",
"maxLength": 200,
"type": "string"
},
"chain": {
"default": "base",
"description": "base | ethereum | polygon | arbitrum | optimism | solana; default base for an EVM address, solana for a Solana address",
"enum": [
"base",
"ethereum",
"polygon",
"arbitrum",
"optimism",
"solana"
],
"type": "string"
},
"max_age_s": {
"default": 3600,
"description": "the oldest cached result you accept, 0-86400 seconds, default 3600; 0 forces fresh on-chain reads",
"maximum": 86400,
"minimum": 0,
"type": "integer"
},
"ref": {
"description": "your own job or payment id, up to 64 printable characters, echoed back and bound into the signed receipt",
"maxLength": 64,
"pattern": "^[\\x20-\\x7E]{1,64}$",
"type": "string"
},
"value": {
"description": "the wallet or contract address, a 0x-prefixed 40-hex EVM address or a base58 Solana address",
"maxLength": 200,
"minLength": 1,
"type": "string"
}
},
"required": [
"value"
],
"type": "object"
}
},
"required": [
"params"
],
"type": "object"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}