ERC-20 allowance(owner, spender) on Base, raw + formatted, flags unlimited appro
ERC-20 allowance(owner, spender) on Base, raw + formatted, flags unlimited approvals.
Answeringour last check, 2026-10-19
1 of 1checks answered this week
40 msmedian answer time
$0.002listed price per call
$0.002price 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://x402-data-api.sigrunner.workers.dev/chain/allowance
| Category | Everything else |
|---|---|
| Provider host | x402-data-api.sigrunner.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 |
|---|---|---|---|---|
| 2026-10-19 | valid payment request | 402 | $0.002 | 40 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"owner": "0x5765ae06a52dc7A0BB71c36A11db512c7ea9ed10",
"spender": "0x4200000000000000000000000000000000000006",
"token": "0x833589fCd6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"owner": {
"description": "owner address",
"type": "string"
},
"spender": {
"description": "spender address",
"type": "string"
},
"token": {
"description": "ERC-20 address",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"allowance": {
"type": "integer"
},
"allowance_raw": {
"type": "string"
},
"chain": {
"type": "string"
},
"decimals": {
"type": "integer"
},
"is_unlimited": {
"type": "boolean"
},
"owner": {
"type": "string"
},
"spender": {
"type": "string"
},
"token": {
"type": "string"
}
},
"required": [
"token",
"owner",
"spender",
"allowance_raw",
"allowance",
"decimals",
"is_unlimited",
"chain"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}