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PlainText Wallet Approval Checker
x402
PlainText Wallet Approval Checker is a paid API for AI agents from plaintext.fizzl.eu, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-19).
Checks an EVM wallet's live token or NFT approvals and returns a plain-language safety verdict (SAFE, CAUTION, or RISK) with an explanation
Price / call$0.04
Success—
StatusUnknown
How this service works
Check an EVM wallet's live token/NFT approvals and get a plain-language verdict (SAFE, CAUTION or RISK) with an explanation
Output
Returns a structured verdict of SAFE, CAUTION, or RISK along with a plain-language explanation describing which approvals were found, which contracts hold permissions, and why the situation is or isn't concerning — making complex on-chain approval data understandable without blockchain expertise.
Example use cases
DeFi wallet approval audit
“Scan my wallet 0x4a2b...8f91 on Arbitrum for token approvals and tell me if anything looks risky — I want a SAFE, CAUTION, or RISK verdict with an explanation.”
NFT collection approval safety check
“Check my wallet 0x9c3e...7d12 on Ethereum for NFT approvals — I'm worried I might have accidentally approved a sketchy contract when minting last week.”
Pre-transfer wallet security review
“Before I move funds out of my Polygon wallet 0x1a7f...3b44, can you check whether any token approvals on it look dangerous?”
Technical details
Endpoint
POSThttps://plaintext.fizzl.eu/api/check-wallet?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a human-readable safety assessment of a wallet's on-chain token or NFT approvals on any of the seven supported EVM chains, especially when the user lacks blockchain expertise and needs a verdict they can act on rather than raw approval data. Prefer this over raw blockchain explorers or approval-revocation tools when the goal is understanding risk level rather than taking immediate action.
Side effects
- Invalid wallet address format (must match 0x followed by 40 hex characters)
- Unsupported chain name — only ethereum, bsc, polygon, arbitrum, optimism, base, avalanche are accepted
- Wallet has no approvals on the specified chain, returning an empty or trivially SAFE result
- RPC or chain node timeout causing inability to fetch live approval data
- Payment failure or insufficient USDC balance via x402 protocol
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| kind | string | Approval type to check (default: token) |
| chain | string | Chain to check approvals on (default: ethereum) |
| address | string | EVM wallet address to check |
Tags
x402
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