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Mint Intel: ERC-20 Allowance on Base
x402
Mint Intel: ERC-20 Allowance on Base 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 is permitted to move from an owner's wallet on the Base blockchain, including an unlimited-approval flag and known-spender label.
Price / call$0.001
Success—
StatusUnknown
How this service works
ERC-20 allowance on Base 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 big-integer string, a decimal-adjusted human-readable allowance value, a boolean unlimited flag (true when approval equals uint256 max), and a label identifying the spender if it is a known protocol such as Permit2 or a DEX router.
Example use cases
Pre-swap approval audit on Base
“Before I swap on Aerodrome, can you check how much of my WETH (0x4200000000000000000000000000000000000006) the Aerodrome router (0xcF77a3Ba9A5CA399B7c97c74d54e5b1Beb874E43) is approved to spend from my wallet 0xAbCd1234...5678 on Base?”
Detect unlimited token approvals
“I want to know if I accidentally gave unlimited USDC approval to any DEX on Base — can you check the allowance for token 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA from my address 0xAbCd1234...5678 to spender 0x6131B5fae19EA4f9D964eAc0408E4408b66337b5 and tell me if it's unlimited?”
Security review before revoking approvals
“As part of a wallet security check, look up the current ERC-20 allowance that Permit2 (0x000000000022D473030F116dDEE9F6B43aC78BA3) has over my DAI tokens (0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb) on Base from address 0xDeF9...1234 — I want to decide whether to revoke it.”
Technical details
Endpoint
GEThttps://mintintel.35-171-220-195.sslip.io/v1/base/allowance/:token/:owner/:spender?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need ERC-20 allowance data on the Base blockchain (not Ethereum mainnet or Solana). It is ideal for DeFi agents auditing token approvals, pre-trade safety checks, wallet security reviews, and detecting unlimited approvals to known spenders like Permit2 or DEX routers. Prefer it over a generic RPC call because it returns decimal-adjusted values, the unlimited flag, and named-spender labels in a single response without any local ABI decoding.
Side effects
- Invalid or non-checksummed address returns a 400 error
- Token address is not a valid ERC-20 contract on Base — call reverts or returns zero
- Unknown spender address returns no label (blank or null label field)
- Base RPC node temporarily unavailable — 503 or timeout
- Owner has no allowance set for the spender — returns zero allowance and unlimited: false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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