Use when you need how much of an ERC-20 token a spender is approved to move from
Use when you need how much of an ERC-20 token a spender is approved to move from an owner, on Base, Ethereum, Arbitrum, Optimism or Polygon, via allowance(owner, spender). Returns raw units and decimal value.
Answeringour last check, 2026-09-25
1 of 1checks answered this week
932 msmedian answer time
$0.001listed price per call
$0.001price 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://biosfera.46-62-215-147.sslip.io/o/erc20-allowance
| Category | Market data |
|---|---|
| Provider host | biosfera.46-62-215-147.sslip.io |
| Networks | eip155:137, 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 |
|---|---|---|---|---|
| 2026-09-25 | valid payment request | 402 | $0.001 | 932 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "base",
"owner": "0x000000000000000000000000000000000000dEaD",
"spender": "0x4200000000000000000000000000000000000006",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon"
],
"type": "string"
},
"owner": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"spender": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"token": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
}
},
"required": [
"chain",
"token",
"owner",
"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"
}