Inspect one Base ERC-20 owner/token/spender allowance with same-block balance an
Inspect one Base ERC-20 owner/token/spender allowance with same-block balance and token metadata plus factual exposure flags. No wallet access, signing, or transaction execution. Call when you need a same-block Base allowance-versus-balance snapshot for one owner/token/spender triple.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
220 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://api.agentmercantile.com/v1/allowance-exposure
| Category | Code and developer |
|---|---|
| Provider host | api.agentmercantile.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 4 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 | $0.01 | 220 ms |
Example input (from the provider)
{
"body": {
"owner": "0x0000000000000000000000000000000000000001",
"spender": "0x0000000000000000000000000000000000000002",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"owner": {
"description": "ERC-20 token owner address. 0x-prefixed 20-byte EVM address.",
"type": "string"
},
"spender": {
"description": "Spender address. 0x-prefixed 20-byte EVM address.",
"type": "string"
},
"token": {
"description": "ERC-20 token contract. 0x-prefixed 20-byte EVM address. Zero address is rejected.",
"type": "string"
}
},
"required": [
"owner",
"token",
"spender"
],
"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": {
"additionalProperties": true,
"properties": {
"allowance_adjusted": {
"type": [
"string",
"null"
]
},
"allowance_balance_exposure_adjusted": {
"type": [
"string",
"null"
]
},
"allowance_balance_exposure_raw": {
"type": [
"string",
"null"
]
},
"allowance_covers_current_balance": {
"type": "boolean"
},
"allowance_raw": {
"description": "uint256 as a decimal integer string",
"type": [
"string",
"null"
]
},
"balance_adjusted": {
"type": [
"string",
"null"
]
},
"balance_raw": {
"type": [
"string",
"null"
]
},
"block_number": {
"type": [
"string",
"null"
]
},
"effectively_unlimited": {
"type": "boolean"
},
"evidence": {
"properties": {
"block_number": {
"type": [
"string",
"null"
]
},
"same_block_reads": {
"type": "boolean"
},
"token_code_present": {
"type": [
"boolean",
"null"
]
}
},
"type": "object"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"machine": {
"enum": [
"VM02"
],
"type": "string"
},
"max_uint256_approval": {
"type": "boolean"
},
"methodology_version": {
"enum": [
"allowance-exposure-0.1.0"
],
"type": "string"
},
"network": {
"enum": [
"eip155:8453"
],
"type": "string"
},
"owner": {
"type": "string"
},
"spender": {
"type": "string"
},
"status": {
"enum": [
"OK",
"HOLD"
],
"type": "string"
},
"token": {
"type": "string"
},
"token_metadata": {
"properties": {
"decimals": {
"type": [
"integer",
"null"
]
},
"symbol": {
"type": [
"string",
"null"
]
}
},
"type": "object"
}
},
"required": [
"status",
"machine",
"methodology_version",
"network",
"block_number",
"owner",
"token",
"spender",
"token_metadata",
"allowance_raw",
"allowance_adjusted",
"balance_raw",
"balance_adjusted",
"allowance_balance_exposure_raw",
"allowance_balance_exposure_adjusted",
"allowance_covers_current_balance",
"max_uint256_approval",
"effectively_unlimited",
"evidence",
"limitations"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}