Check how much of a wallet's ERC-20 token a spender contract is approved to move
Check how much of a wallet's ERC-20 token a spender contract is approved to move on Base: the raw and formatted allowance, the token symbol and decimals, and whether the approval is unlimited. Use before a swap or deposit to see if an approve transaction is needed, and to audit a wallet for risky unlimited approvals.
Not tested: has real-world effectsour last check, 2026-10-24
0 of 0checks answered this week
n/amedian answer time
$0.002listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://agent-data-tools.revmesh2074.workers.dev/base-allowance
| Category | Code and developer |
|---|---|
| Provider host | agent-data-tools.revmesh2074.workers.dev |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"owner": "0x4200000000000000000000000000000000000006",
"spender": "0x000000000022D473030F116dDEE9F6B43aC78BA3",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"owner": {
"description": "Wallet address that holds the token (0x...)",
"examples": [
"0x4200000000000000000000000000000000000006"
],
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"spender": {
"description": "Address allowed to spend, usually a router or protocol contract (0x...)",
"examples": [
"0x000000000022D473030F116dDEE9F6B43aC78BA3"
],
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"token": {
"description": "ERC-20 token contract address on Base (0x...)",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
}
},
"required": [
"token",
"owner",
"spender"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"allowance": {
"type": "string"
},
"allowanceFormatted": {
"type": "string"
},
"approved": {
"type": "boolean"
},
"chain": {
"type": "string"
},
"decimals": {
"type": "number"
},
"owner": {
"type": "string"
},
"spender": {
"type": "string"
},
"symbol": {
"type": "string"
},
"token": {
"type": "string"
},
"unlimited": {
"type": "boolean"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}