ERC-20 allowance on 16 EVM chains
ERC-20 allowance on 16 EVM chains: how much a spender may move from an owner, scaled by decimals, with unlimited and zero flags.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
356 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
GET https://saylorinnovations.com/api/chain/allowance
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| 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
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 356 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"spender": "0x000000000022D473030F116dDEE9F6B43aC78BA3",
"token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
},
"owner": {
"description": "the wallet that granted the approval",
"type": "string"
},
"spender": {
"description": "the contract or wallet allowed to spend",
"type": "string"
},
"token": {
"description": "the ERC-20 token contract",
"type": "string"
}
},
"required": [
"chain",
"token",
"owner",
"spender"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"allowance": {
"description": "allowance divided by 10^decimals",
"type": [
"string",
"null"
]
},
"allowance_raw": {
"description": "allowance in the smallest unit",
"type": "string"
},
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"decimals": {
"description": "token decimals",
"type": [
"number",
"null"
]
},
"is_unlimited": {
"description": "true when the allowance is at least half of the maximum uint256 (a standard unlimited approval)",
"type": "boolean"
},
"is_zero": {
"description": "true when no allowance is set",
"type": "boolean"
},
"owner": {
"description": "wallet that granted the approval",
"type": "string"
},
"source": {
"description": "where the data was read from",
"type": "string"
},
"spender": {
"description": "address allowed to spend",
"type": "string"
},
"symbol": {
"description": "token symbol",
"type": [
"string",
"null"
]
},
"token": {
"description": "the token contract",
"type": "string"
}
},
"required": [
"chain",
"chain_id",
"token",
"owner",
"spender",
"allowance_raw",
"is_unlimited",
"is_zero",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}