Returns the amount of ERC20 tokens that a spender is allowed to withdraw from an
Returns the amount of ERC20 tokens that a spender is allowed to withdraw from an owner's account, via the allowance method. Inputs: contract address, owner address, spender address. Output: allowance amount as a uint256. Query: token (ERC-20 contract, 0x + 40 hex), owner (0x + 40 hex), spender (0x + 40 hex).
Not tested: has real-world effectsour last check, 2026-09-24
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Endpoint
GET https://ari001.tailb4ac3a.ts.net/v1/ventures/ethereum_contract_abi_service/erc20_allowance
| Category | Market data |
|---|---|
| Provider host | ari001.tailb4ac3a.ts.net |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
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Example input (from the provider)
{
"method": "GET",
"queryParams": {
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"spender": "0x000000000022D473030F116dDEE9F6B43aC78BA3",
"token": "0xdAC17F958D2ee523a2206206994597C13D831ec7"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"owner": {
"description": "0x + 40 hex",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"spender": {
"description": "0x + 40 hex",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"token": {
"description": "ERC-20 contract, 0x + 40 hex",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
}
},
"required": [
"token",
"owner",
"spender"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"type": "string"
},
"error": {
"description": "present when ok is false",
"type": "string"
},
"method": {
"type": "string"
},
"ok": {
"type": "boolean"
},
"result": {
"description": "the uint256 as a decimal string",
"type": "string"
},
"service": {
"type": "string"
}
},
"required": [
"ok",
"service"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}