{"uid":"cap_ZJB5lfL33KSr230NvOfs5","slug":"100btc-token-permission-checker-base-chain-18eeb76a","name":"100BTC Token Permission Checker (Base Chain)","description":"Thirty x402 v2 pay-per-call APIs by 100BTC. Listing data is generated from each live HTTP 402 challenge and runtime Bazaar schema.","url":"https://vps-fc89c157-1.taila28d02.ts.net:10000/api/permissions?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"owner":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"pairs":{"type":"array","items":{"type":"object","required":["token","spender"],"properties":{"token":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"spender":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"}},"additionalProperties":false},"maxItems":25,"minItems":1},"chain_id":{"type":"integer","const":8453}}},"responseSchema":{"type":"json","example":{"scope":"only caller-supplied pairs","results":[{"risk":"LOW","status":"NONE"}],"chain_id":8453,"execution":"READ_ONLY"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4y-CwPxDFFjv8jjCbQNhW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks ERC-20 token allowance approval status and risk level for one or more owner/token/spender pairs on Base (chain ID 8453)","exampleAgentPrompt":"Check the token approval status and risk level for wallet 0xAbC...123 on Base — specifically whether the spender 0xDEF...456 has permission to move token 0x789...ABC.","exampleUseCases":[{"title":"DeFi wallet security audit","prompt":"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."},{"title":"Pre-swap approval check","prompt":"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?"},{"title":"Batch multi-token permission review","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T18:31:06.974Z","isFirstParty":false,"canonicalSlug":"100btc-token-permission-checker-base-chain-18eeb76a"}