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xx402 ERC20 Token Allowance Risk Checker (Base Chain)
x402
xx402 ERC20 Token Allowance Risk Checker (Base Chain) is a paid API for AI agents from x402.xx402.icu, paid per call via x402, $0.001/call, status down (last checked 2026-10-23).
Fetches and risk-assesses the ERC20 token allowance granted by an owner to a spender on the Base blockchain, including exposure analysis and revocation guidance.
Price / call$0.001
Success—
StatusDown
How this service works
Paid Base token, wallet, DeFi, chain-read, x402 buyer/seller discovery, and specialized Bitcoin 15-minute Up/Down prediction-market data packets for autonomous agents and risk tools.
Output
Returns a JSON object with a plain-language risk summary, a risk decision label, the current allowance amount, token metadata, owner and spender addresses, an exposure level assessment, an unsigned revoke transaction call (if applicable), a risk breakdown by category, prioritized next-product recommendations, and source status indicating which on-chain or off-chain data sources were used.
Example use cases
DeFi approval risk audit
“I want to know how much USDC spending I've approved for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base from my wallet 0xba76c7ECa175f67cFcE475c09498f840176bf497 — is the exposure dangerous and do I need to revoke it?”
Wallet security sweep before bridging
“Before I bridge funds, check whether my wallet 0xba76c7ECa175f67cFcE475c09498f840176bf497 has any risky unlimited USDC approvals on Base for spender 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and give me the unsigned revoke transaction if needed.”
Autonomous agent allowance monitor
“Monitor the ERC20 token allowance on Base for owner 0xba76c7ECa175f67cFcE475c09498f840176bf497 and spender 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — flag if the risk decision is high and queue it for review.”
Technical details
Endpoint
GEThttps://x402.xx402.icu/api/base-chain/allowance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, risk-annotated view of a specific ERC20 token allowance on the Base chain, especially when you want both the raw allowance figure and actionable risk guidance (decision, exposure level, revocation call) in a single response. Prefer it over raw on-chain RPC calls when you need the risk intelligence layer on top of chain data, and over generic block explorers when you need machine-readable output suitable for autonomous agent decision-making.
Side effects
- Invalid wallet address format returns a 400 or schema validation error
- Unknown or unverified token contract may return incomplete source_status
- On-chain RPC unavailability causes source_status failures with partial data
- Payment not completed (x402) returns 402 Payment Required before data is served
- Very new token contracts may have no risk data, resulting in sparse risk_breakdown
Output
Schema · Response
{
"keys": [
"summary",
"decision",
"allowance",
"token",
"owner",
"spender",
"exposure",
"unsigned_revoke_call",
"next_products",
"priority_queue",
"risk_breakdown",
"review_queue",
"avoid_queue",
"bucket_counts",
"source_status",
"sources"
],
"type": "json"
}Tags
x402
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