ERC-20 Allowance Risk Check

x402

ERC-20 Allowance Risk Check is a paid API for AI agents from api.zlovev.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02).

Returns live ERC-20 token allowances for a wallet across common protocol spenders, with risk labels and unlimited-approval flags, on Base or Ethereum mainnet.

Price / call$0.05

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StatusUnknown

How this service works

Pay-per-call data API for AI agents. No API key, no account, no signup — pay USDC on Base (eip155:8453) per request; free /api/meta lists all 24 endpoints. One call each: web page to LLM-ready text and link previews; China A-share quotes and limit-up pool; Chinese text and pinyin; Base/Ethereum on-chain reads (address, token, ERC-20 balances, tx, blocks, transfer history, gas price in USD); NFT records (collection, owner, and ipfs:// tokenURI resolved through public gateways); full-page screenshots; email verification without sending mail; ENS forward/reverse resolution; smart-contract due diligence (ABI, verified source, proxy); token security facts (owner, renounced ownership, paused, bytecode capability selectors); domain dossier (RDAP, DNS, TLS certificate, HTTP facts, hosting network); a one-call rule-based contract verdict (published-weights exposure score, owner/pause/proxy/capability facts, every reason with evidence); and an ERC-20 allowance risk check that returns the live allowance matrix for one wallet across up to 10 spenders (unlimited flags, contract/EOA status, exact revoke calls) with a single verdict.

Output

A JSON object with: the block number of the check, chain and network identifiers, wallet balance and token metadata (symbol, decimals, address), a high-level verdict (clean/risky/etc.) with counts by risk level and a headline summary, and a per-spender array each containing the allowance amount (raw and formatted), whether it's unlimited, whether it exceeds the current balance, the risk label, whether the spender is a contract, whether it's Permit2, and a human-readable label.

Example use cases

Pre-transfer wallet security audit

“Before I move my funds, can you check wallet 0xAbc123...def for any risky or unlimited USDC allowances on Base across common DeFi routers?”

Post-hack triage for drained wallet

“My Ethereum wallet 0xDead...Beef just got drained — can you pull all the token allowances it had granted so I can figure out which protocol was exploited?”

Routine DeFi approval hygiene check

“Run an allowance risk check on my Base wallet 0x1234...5678 for the USDC token and flag any spender that has an unlimited or balance-exceeding approval I should clean up.”

Technical details

Endpoint

GEThttps://api.zlovev.com/api/chain/allowance-risk?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a one-call, risk-labelled summary of all ERC-20 allowances a wallet has granted, particularly for security audits, post-incident triage, or DeFi hygiene checks. It is superior to raw on-chain reads because it aggregates multiple spenders, applies risk scoring, and flags unlimited or balance-exceeding approvals automatically. Prefer it over generic blockchain RPC calls when you want interpreted risk output rather than raw allowance integers.

Side effects

Missing or invalid owner address returns a validation error
More than 10 spender addresses returns an error
Unsupported chain value returns a 400-level error
Token contract address not found on the chosen chain may return empty or error
Network congestion or RPC failure may return a 5xx error
Payment not received (x402) returns a 402 Payment Required response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "block": 51518553,
    "chain": "base",
    "owner": "0x5c673769fbfbe227affbabc27ef1fbf2665d9ebb",
    "scope": {
      "checked": 5,
      "max_spenders": 10,
      "spender_source": "default_router_table"
    },
    "token": {
      "symbol": "USDC",
      "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
      "balance": 0,
      "decimals": 6,
      "balance_raw": "0"
    },
    "network": "eip155:8453",
    "verdict": {
      "label": "clean",
      "counts": {
        "low": 0,
        "high": 0,
        "none": 5,
        "medium": 0,
        "unknown": 0
      },
      "headline": "已检查的 5 个 spender 上均无未撤销授权"
    },
    "spenders": [
      {
        "risk": "none",
        "label": "permit2",
        "permit2": true,
        "spender": "0x000000000022d473030f116ddee9f6b43ac78ba3",
        "allowance": 0,
        "unlimited": false,
        "allowance_raw": "0",
        "exceeds_balance": false,
        "spender_is_contract": true
      }
    ]
  }
}

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