Approval check for one wallet and one ERC-20 token on Base
Approval check for one wallet and one ERC-20 token on Base: how much each spender (up to 10 app or router addresses) is allowed to move, flagging unlimited approvals and approvals covering the full balance, plus approvals made through Uniswap Permit2 with their expiry. Defaults to checking Permit2 itself. Useful before signing, for wallet hygiene, and for spotting approvals to revoke. Read-only. Not charged for invalid addresses or non-tokens.
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://verifylite.hydratinghealingtouch.workers.dev/chain/allowance
| Category | Market data |
|---|---|
| Provider host | verifylite.hydratinghealingtouch.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-26 | valid payment request | 402 | $0.0033 | 29 ms |
Example input (from the provider)
{
"body": {
"owner": "0xb33134504393140cfd963d76f62907d660880932",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"owner": {
"description": "Wallet 0x address on Base.",
"type": "string"
},
"spenders": {
"description": "Optional: up to 10 spender addresses (array or comma-separated). Defaults to Uniswap Permit2.",
"items": {
"type": "string"
},
"maxItems": 10,
"type": "array"
},
"token": {
"description": "Token contract 0x address on Base.",
"type": "string"
}
},
"required": [
"owner",
"token"
],
"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": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}