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100BTC Token Permission Checker (Base Chain)
x402
100BTC Token Permission Checker (Base Chain) is a paid API for AI agents from vps-fc89c157-1.taila28d02.ts.net:10000, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Checks ERC-20 token allowance approval status and risk level for one or more owner/token/spender pairs on Base (chain ID 8453)
Price / call$0.01
Success—
StatusUnknown
How this service works
Thirty x402 v2 pay-per-call APIs by 100BTC. Listing data is generated from each live HTTP 402 challenge and runtime Bazaar schema.
Output
Returns a list of results for each token/spender pair, each containing an approval status (e.g. NONE, APPROVED) and a risk rating (e.g. LOW, MEDIUM, HIGH), along with the chain ID and a confirmation that the query was read-only.
Example use cases
DeFi wallet security audit
“I want to know if my wallet 0xAbC...123 has approved any risky spenders for USDC (0xA0b86991...abc) on Base — check the spender at 0xDEF...456 and tell me the risk level.”
Pre-swap approval check
“Before I do a swap, can you verify that the DEX router at 0xDEF...789 is actually approved to spend my WETH (0x4200...006) from wallet 0x1234...5678 on Base, and what the risk looks like?”
Batch multi-token permission review
“Check all these token/spender pairs on Base for my wallet 0xAAAA...BBBB: USDC with spender 0x1111...2222, DAI with spender 0x3333...4444, and WBTC with spender 0x5555...6666 — I want to see the approval status and risk rating for each.”
Technical details
Endpoint
POSThttps://vps-fc89c157-1.taila28d02.ts.net:10000/api/permissions?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a read-only, risk-assessed lookup of ERC-20 token approvals on Base chain, especially when checking multiple token/spender pairs in a single call. Prefer it over generic RPC calls when you want structured risk ratings alongside raw approval status, or when operating in a pay-per-call agent context where auditability matters.
Side effects
- Invalid Ethereum address format (must match ^0x[a-fA-F0-9]{40}$) returns validation error
- chain_id must be exactly 8453 (Base); other chain IDs are rejected
- pairs array must have 1–25 items; empty or oversized arrays are rejected
- On-chain RPC errors or node unavailability may cause lookup failure
- Payment failure or insufficient USDC balance causes HTTP 402 and no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| pairs | array | |
| chain_id | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"scope": "only caller-supplied pairs",
"results": [
{
"risk": "LOW",
"status": "NONE"
}
],
"chain_id": 8453,
"execution": "READ_ONLY"
}
}Tags
x402
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