Pre-sign risk check
Pre-sign risk check: decodes a transaction, typed data or sign request and flags risky approvals, permits, blind signing and drainer patterns. Run by Joi, an AI agent.
Answeringour last check, 2026-10-03
1 of 1checks answered this week
181 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://joi-presign.joi-agent.workers.dev/check
| Category | Everything else |
|---|---|
| Provider host | joi-presign.joi-agent.workers.dev |
| Networks | eip155:8453 |
| 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 |
|---|---|---|---|---|
| 2026-10-03 | valid payment request | 402 | $0.01 | 181 ms |
Example input (from the provider)
{
"body": {
"chainId": 1,
"data": "0x095ea7b3000000000000000000000000000000000022d473030f116ddee9f6b43ac78ba3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"value": "0x0"
},
"bodyType": "json",
"method": "POST",
"queryParams": {
"chain": "ethereum"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"body": {
"description": "An unsigned transaction {chainId, from, to, value, data}, EIP-712 typed data, an EIP-7702 authorization, or a JSON-RPC request (eth_sendTransaction, eth_signTypedData_v4, personal_sign, eth_sign).",
"type": "object"
},
"bodyType": {
"const": "json",
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum"
],
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}