approval-advisor tells you WHAT to revoke; this builds the HOW
approval-advisor tells you WHAT to revoke; this builds the HOW: the ready-to-sign transaction (to + calldata) for approve(spender, 0) on a token, plus the live current allowance read from Base (flags unlimited, or 'already revoked'). Hand the result straight to a wallet or agent signer — the action half of approval hygiene.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
574 msmedian answer time
$0.02listed price per call
$0.02price 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
GET https://402.com.tr/api/x402/revoke-builder
| Category | Market data |
|---|---|
| Provider host | 402.com.tr |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 574 ms |
Example input (from the provider)
{
"method": "GET",
"pathParams": {},
"queryParams": {
"spender": "0xcF77a3Ba9A5CA399B7c97c74d54e5b1Beb874E43",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"wallet": "0x973a31858f4d2125f48c880542da11a2796f12d6"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"type": "object"
},
"queryParams": {
"properties": {
"spender": {
"description": "Spender to revoke",
"type": "string"
},
"token": {
"description": "Token contract",
"type": "string"
},
"wallet": {
"description": "Your wallet (optional, reads live allowance)",
"type": "string"
}
},
"required": [
"token",
"spender"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}