Token Approvals

getApprovals

Scans ERC-20 allowances for known DeFi spenders against common tokens per chain. Does not scan all approvals.

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "method": "getApprovals",
  "params": {
    "chain": "ethereum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "blockHeight": 19834521
  },
  "id": 1
}'

import { Spectrum } from '@spectrumnodes/sdk';

const spectrum = new Spectrum({ api: 'https://your-endpoint.simplystaking.xyz/YOUR_API_KEY/' });

const result = await spectrum.defi.getApprovals('ethereum', '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045');
console.log(result);

{
  "jsonrpc": "2.0",
  "result": {
    "data": {
      "chain": "ethereum",
      "address": "0xd8dA6BF...",
      "blockHeight": 19834521,
      "approvals": [
        {
          "token": {
            "symbol": "USDC",
            "address": "0xA0b8..."
          },
          "spender": {
            "name": "Uniswap V3 Router",
            "address": "0x68b3..."
          },
          "allowance": "unlimited",
          "isUnlimited": true
        }
      ]
    }
  },
  "id": 1
}

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \

{
  "jsonrpc": "2.0",
  "method": "getApprovals",
  "params": {
    "chain": "ethereum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "blockHeight": 19834521
  },
  "id": 1
}

Spenders

Uniswap V3 RouterUniswap V4 Universal RouterAave V3 PoolAave V2 Lending Pool1inch V6 Router

Tokens Checked

USDCUSDTDAIWETHWBTCLINK

Parameters

Name	Required	Description
chain	yes	Network slug
address	yes	Wallet address to scan e.g. 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045
blockHeight	no	Historical EVM block number (archive nodes only) e.g. 19834521

Response Fields

Field	Type
`data`	object
`chain`	string
`address`	string
`blockHeight`	integer
`approvals`	object[]
`token`	object
`symbol`	string
`address`	string
`spender`	object
`name`	string
`address`	string
`allowance`	string
`isUnlimited`	boolean

Supported Networks

EthereumPolygonBNB ChainOptimismBaseAvalancheArbitrumGnosisMoonbeamLineaHyperliquidBerachainMonadScrollPlasmaX Layer

Try It

Base URL

Chain

address *

blockHeight

JSON-RPC Body

{
  "jsonrpc": "2.0",
  "method": "getApprovals",
  "params": {
    "chain": "ethereum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "blockHeight": 19834521
  },
  "id": 1
}

getApprovalsRevoke

Returns an unsigned ERC-20 approve(spender, 0) transaction to revoke a specific token approval. Does not broadcast.

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "method": "getApprovalsRevoke",
  "params": {
    "chain": "ethereum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "spender": "0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45"
  },
  "id": 1
}'

import { Spectrum } from '@spectrumnodes/sdk';

const spectrum = new Spectrum({ api: 'https://your-endpoint.simplystaking.xyz/YOUR_API_KEY/' });

const result = await spectrum.defi.getRevokeTransaction('ethereum', '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045', {
  token: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
  spender: '0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45'
});
console.log(result);

{
  "jsonrpc": "2.0",
  "result": {
    "data": {
      "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "from": "0xd8dA6BF...",
      "data": "0x095ea7b3...0000",
      "value": "0x0"
    }
  },
  "id": 1
}

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \

{
  "jsonrpc": "2.0",
  "method": "getApprovalsRevoke",
  "params": {
    "chain": "ethereum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "spender": "0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45"
  },
  "id": 1
}