{"id":"2dd3fe89-14b1-493a-a3fa-253224692ede","shortId":"EXZZ8x","kind":"x402","title":"Query token approval data for any wallet address on Base, paid per call via x402 in USDC or USDT.","tagline":"Query token approval data for any wallet address on Base, paid per call via x402 in USDC or USDT.","description":"The `/v1/base/wallet/approvals` endpoint, operated by Erudite Intelligence LLC, returns token approval (allowance) data for a given wallet or contract address on the Base network. It is an x402-gated endpoint: callers must attach a valid payment header to each request. The endpoint accepts a JSON body with an `address` field and returns approval data in JSON format.\n\nPricing is $0.01 per call, payable in either USDC on Base (eip155:8453) or USDT on Tron (tron:728126428). Payment is facilitated through the EruditePay x402 Bridge, which supports the x402 v2 protocol and settles via Coinbase CDP. The provider is FinCEN MSB registered (BSA ID 31000324258137) and operates a non-custodial settlement model.\n\nThe endpoint is live and returns a proper 402 challenge when called without payment. Documentation beyond the x402 challenge schema is sparse — the provider's `/docs` path returns a 404, and the response schema only shows a generic `{\"success\": true, \"data\": {}}` example without detailing the structure of the approval data returned. Users should expect to experiment or contact the provider for full field-level documentation.","tags":[],"capabilities":["wallet-approvals","token-allowance-lookup","base-chain","x402-payment","crypto-data-intelligence","erc20-approvals"],"categories":["crypto","blockchain-data"],"synonyms":["token approvals","wallet allowances","ERC-20 approvals","Base chain approvals","spending approvals","token permissions","wallet approval checker"],"warnings":["No dedicated documentation available — /docs returns 404","Response schema is a stub; the actual structure of approval data is undocumented","Only a generic example response ({\"success\": true, \"data\": {}}) is provided; real output fields are unknown"],"endpointUrl":"https://bridge.eruditepay.com/v1/base/wallet/approvals","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live with a well-formed x402 v2 challenge and a basic input/output schema, but documentation is effectively absent (/docs returns 404). The response example is a stub with an empty data object, so the actual approval data structure is unknown. Pricing and payment options are 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'/v1/base/wallet/approvals':40 '0.01':99 '31000324258137':143 '402':160 '404':181 '728126428':115 '8453':109 'Base chain approvals' 'ERC-20 approvals' 'accept':82 'address':8,27,58,88 'allow':50 'approv':3,22,49,92,200 'attach':72 'base':10,29,61,107 'base-chain' 'beyond':167 'bodi':85 'bridg':123 'bsa':141 'call':13,32,101,163 'caller':70 'cdp':134 'challeng':161,170 'coinbas':133 'contact':209 'contract':57 'crypto-data-intelligence' 'custodi':149 'data':4,23,51,93,192,201 'detail':195 'document':166,217 'eip155':108 'either':104 'endpoint':41,69,81,153 'erc20-approvals' 'erudit':44 'eruditepay':121 'exampl':193 'expect':205 'experi':207 'facilit':118 'field':89,215 'field-level':214 'fincen':138 'format':96 'full':213 'gate':68 'generic':189 'given':54 'header':76 'id':142 'intellig':45 'json':84,95 'level':216 'live':155 'llc':46 'model':151 'msb':139 'must':71 'network':62 'non':148 'non-custodi':147 'oper':42,145 'paid':11,30 'path':178 'payabl':102 'payment':75,116,165 'per':12,31,100 'price':97 'proper':159 'protocol':129 'provid':136,175,211 'queri':1,20 'regist':140 'request':79 'respons':184 'return':47,91,157,179,202 'schema':171,185 'settl':131 'settlement':150 'show':187 'spars':173 'spending approvals' 'structur':197 'success':190 'support':125 'token':2,21,48 'token approvals' 'token permissions' 'token-allowance-lookup' 'tron':113,114 'true':191 'usdc':17,36,105 'usdt':19,38,111 'user':203 'v2':128 'valid':74 'via':14,33,132 'wallet':7,26,55 'wallet allowances' 'wallet approval checker' 'wallet-approvals' 'without':164,194 'x402':15,34,67,122,127,169 'x402-gated':66 'x402-payment'","prices":[{"id":"3a4ba49b-f899-46e7-b177-751526624a1b","listingId":"2dd3fe89-14b1-493a-a3fa-253224692ede","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:37.137Z"}],"sources":[{"listingId":"2dd3fe89-14b1-493a-a3fa-253224692ede","source":"x402_bazaar","sourceId":"https://bridge.eruditepay.com/v1/base/wallet/approvals","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.137Z","lastSeenAt":"2026-04-22T05:32:29.337Z"}],"details":{"listingId":"2dd3fe89-14b1-493a-a3fa-253224692ede","quickStartSnippet":"curl -X POST https://bridge.eruditepay.com/v1/base/wallet/approvals \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\n  -d '{\"address\": \"0xYourWalletAddress\"}'","exampleRequest":{"address":"0x0000000000000000000000000000000000000000"},"exampleResponse":{"data":{},"success":true},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Provider is Erudite Intelligence LLC, FinCEN MSB registered with BSA ID 31000324258137","source_url":"https://bridge.eruditepay.com"},{"claim":"Settlement pricing is 0.5% per settlement; verification is free","source_url":"https://bridge.eruditepay.com"},{"claim":"EruditePay Bridge supports 20 blockchains and x402 v2 protocol","source_url":"https://bridge.eruditepay.com"},{"claim":"Payment facilitated via Coinbase CDP","source_url":"https://bridge.eruditepay.com"},{"claim":"Endpoint accepts POST with JSON body containing an address field and returns JSON","source_url":"https://bridge.eruditepay.com/v1/base/wallet/approvals"}],"useCases":["Check which contracts a wallet has approved to spend its tokens on Base","Audit token allowances before interacting with a DeFi protocol","Monitor wallet security by reviewing outstanding approvals","Build dashboards showing a user's active token approvals"],"bestFor":["Agents or apps that need on-chain approval data for Base wallets","Security auditing tools that flag risky or unlimited token approvals","DeFi portfolio trackers that display allowance exposure"],"notFor":["Querying approvals on chains other than Base (endpoint is Base-specific)","Free or high-volume bulk scanning without per-call payment budget","Getting full transaction history or balance data (this is approvals only)"],"kindDetails":{},"updatedAt":"2026-04-22T02:06:10.901Z"}}