# Mint Intel: ERC-20 Allowance on Ethereum

> Mint Intel: ERC-20 Allowance on Ethereum is a paid API for AI agents from mintintel.35-171-220-195.sslip.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the decimal-adjusted ERC-20 token allowance a spender address may move from an owner's Ethereum wallet, including an unlimited-approval flag and known-spender label.

## Facts

- Endpoint: GET https://mintintel.35-171-220-195.sslip.io/v1/eth/allowance/:token/:owner/:spender?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mint-intel-erc-20-allowance-on-ethereum-03f8533c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uAWfWCZGsxbuwU1vdYA55

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mint-intel-erc-20-allowance-on-ethereum-03f8533c
```

Example prompt: Can you check how much USDC the Permit2 contract (0x000000000022D473030F116dDEE9F6B43aC78BA3) is approved to spend from my wallet (0xYourOwnerAddress) on Ethereum? I want to know if it's an unlimited approval.

## When to prefer this

Use this endpoint when you need a quick, decimal-adjusted ERC-20 allowance check on Ethereum mainnet with the added context of an unlimited-approval flag and known-spender identification. Prefer it over raw RPC calls when you want the human-readable enrichment (label, unlimited flag) without writing your own ABI decoding logic. It's ideal for DeFi security audits, pre-trade checks, and wallet approval dashboards.

## Known failure modes

- Invalid or non-checksummed Ethereum address returns a 400 error
- Non-ERC-20 contract address (e.g. EOA or non-standard token) may return zero or an RPC error
- Network congestion or RPC node unavailability may cause timeouts
- Token contract that does not implement standard allowance() ABI will fail the eth_call
- Spender address not in known-spender registry returns null label rather than an error

## How this service works

ERC-20 allowance on Ethereum via allowance(owner, spender) (eth_call) - how much a spender such as Permit2 or a DEX router may move from an owner's wallet, decimal-adjusted, with unlimited-approval flag and known-spender label.

## Output

Returns the token contract address, the raw allowance as a string, a boolean indicating whether the approval is effectively unlimited (max uint256), and a human-readable label for recognized spenders such as Permit2 or known DEX routers. The allowance value is decimal-adjusted for the token's precision.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "token",
      "owner",
      "spender"
     ],
     "properties": {
      "owner": {
       "type": "string",
       "description": "0x-prefixed 20-byte EVM address"
      },
      "token": {
       "type": "string",
       "description": "0x ERC-20 token contract address"
      },
      "spender": {
       "type": "string",
       "description": "0x-prefixed 20-byte EVM address"
      }
     },
     "additionalProperties": false
    },
    "queryParams": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "token",
      "allowanceRaw",
      "unlimited"
     ],
     "properties": {
      "token": {
       "type": "string"
      },
      "unlimited": {
       "type": "boolean"
      },
      "allowanceRaw": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mint-intel-erc-20-allowance-on-ethereum-03f8533c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
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