{"id":"82a79153-a774-4e65-a1f8-8fbe7fc11a23","shortId":"Xnd7wH","kind":"x402","title":"Check MNT wallet balance via x402 micropayment on Base for $0.02 per request.","tagline":"Check MNT wallet balance via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns wallet balance information for MNT (Mantle) tokens. It is part of a broader platform offering dozens of pay-per-call API endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure categories — all gated behind the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/wallet/MNT/balance` accepts POST requests and is priced at a maximum of $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is settled on-chain via the x402 \"exact\" scheme to a designated wallet address. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nDocumentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format and required request body fields are unknown.","tags":[],"capabilities":["wallet-balance","crypto-data","x402-payment","base-network","usdc-settlement","pay-per-call"],"categories":["crypto","finance"],"synonyms":["MNT balance","Mantle token balance","wallet balance API","crypto balance check","MNT wallet","token balance lookup"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content","The endpoint description 'Premium API Access' is generic and does not describe the actual wallet balance functionality","Cannot verify what data is actually returned or whether the endpoint functions correctly beyond the 402 challenge"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The actual functionality (what request body is expected, what the response looks like) is entirely unknown from the crawled 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'0.02':11,24,91 '000':95 '20':94 '402':194 '6':101 'MNT balance' 'MNT wallet' 'Mantle token balance' 'accept':81 'across':55 'actual':198 'address':118 'ai/ml':58 'analyt':57 'api':53,120,152 'attach':131 'avail':181 'balanc':4,17,33 'base':9,22,73,96 'base-network' 'behind':66 'bodi':204 'broader':44 'call':52,93 'caller':129 'categori':63 'chain':108 'challeng':195 'check':1,14 'commit':126 'confirm':189 'connect':161 'crawl':184 'crypto balance check' 'crypto-data' 'data':56 'decim':102 'design':116 'detail':168 'doc':151 'document':143 'dozen':47 'endpoint':28,54,79,187 'exact':112 'exampl':180 'extrem':148 'field':205 'finance/web3':60 'format':200 'gate':65 'header':136 'infer':59 'inform':34 'infrastructur':62 'key':121 'limit':123 'live':190 'lowpaymentfee.com':30 'mantl':37 'materi':185 'maximum':89 'micropay':7,20 'mnt':2,15,36 'network':74 'offer':46 'on-chain':106 'openapi':172 'page':156 'part':41 'pay':50 'pay-per-cal':49 'pay-per-call' 'payment':69,103,135,141 'per':12,25,51,92 'platform':45 'post':82 'price':86,153 'prompt':163 'proof':142 'proper':193 'protocol':70 'rate':122 'readm':155 'render':158 'request':13,26,83,203 'request/response':175 'requir':128,202 'respons':199 'return':31,191 'schema':176 'scheme':113 'settl':105 'simpli':130 'site':146 'spars':149 'spec':173 'specif':78 'technic':167 'token':38 'token balance lookup' 'unit':97 'unknown':207 'upfront':125 'usag':179 'usdc':76,99 'usdc-settlement' 'use':75 'valid':139 'via':5,18,109 'wallet':3,16,32,117,162 'wallet balance API' 'wallet-balance' 'x':134 'x-payment':133 'x402':6,19,68,111,140 'x402-payment'","prices":[{"id":"5a35c466-ef2a-4530-a436-42ead613a469","listingId":"82a79153-a774-4e65-a1f8-8fbe7fc11a23","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:18.444Z"}],"sources":[{"listingId":"82a79153-a774-4e65-a1f8-8fbe7fc11a23","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:18.444Z","lastSeenAt":"2026-04-23T12:32:03.145Z"}],"details":{"listingId":"82a79153-a774-4e65-a1f8-8fbe7fc11a23","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/MNT/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is used for payment","source_url":"https://lowpaymentfee.com/api/v1/wallet/MNT/balance"}],"useCases":["Querying MNT (Mantle) token wallet balances programmatically","Building portfolio trackers that need on-demand balance lookups","Integrating wallet balance checks into automated trading or monitoring bots"],"bestFor":["Agents needing quick one-off wallet balance queries without API key setup","Developers who prefer pay-per-call crypto data access on Base","Automated workflows that need MNT balance data with minimal onboarding"],"notFor":["High-frequency polling where $0.02/request adds up quickly","Users who need detailed transaction history beyond a simple balance","Anyone requiring comprehensive multi-chain wallet analytics in a single call"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.649Z"},"updatedAt":"2026-04-23T12:32:03.145Z"}}