{"id":"92da17f5-c27e-4c49-b87c-1b811ac8a384","shortId":"hxJGTt","kind":"x402","title":"x402-gated product inventory endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated product inventory endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 82) via the x402 payment protocol. It is gated behind a per-request USDC micropayment on the Base network. The x402 challenge confirms the endpoint is live and accepts POST requests, returning application/json responses.\n\nThe hosting site lowpaymentfee.com offers a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint (/api/v1/products/82/inventory) is listed as \"Premium API Access\" with a maximum payment of 20,000 base units of USDC (0.02 USDC, i.e., $0.02), consistent with the site's uniform pricing. Payment is settled on-chain on Base to the specified wallet address.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the inventory data actually contains or what parameters the POST body expects. The endpoint name suggests it returns inventory information for a specific product, but the actual payload structure is unknown. Agents should be prepared to experiment or contact the provider for integration details.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","product-inventory","pay-per-request","json-response","post-method"],"categories":["commerce","data"],"synonyms":["product inventory API","x402 inventory endpoint","USDC micropayment API","Base network API","lowpaymentfee","pay-per-call API","product data endpoint"],"warnings":["No API documentation available — docs, pricing, and API pages only show 'Connect wallet'","No OpenAPI or JSON schema describing request parameters or response format","The purpose and content of 'product 82 inventory' is entirely unspecified","No request or response examples available anywhere in crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/82/inventory","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/products/82/inventory","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the inventory data actually contains. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':102,126,129 '000':121 '20':120 '82':42 'Base network API' 'USDC micropayment API' 'accept':71 'access':34,114 'actual':188,211 'address':149 'agent':216 'ai/ml':93 'analyt':92 'api':89,113,158 'application/json':75 'base':8,22,60,122,144 'base-network' 'behind':51 'bodi':195 'broad':83 'catalog':84 'chain':142 'challeng':64 'confirm':65 'connect':164 'consist':130 'contact':223 'contain':189 'data':91,187 'descript':182 'detail':171,228 'doc':155 'document':150 'endpoint':6,20,30,67,107,198 'exampl':179 'expect':196 'experi':221 'extrem':152 'finance/web3':95 'gate':3,17,50,88 'host':78 'i.e':128 'id':41 'infer':94 'inform':204 'infrastructur':97 'integr':227 'inventori':5,19,38,186,203 'json-response' 'list':110 'live':69 'lowpaymentfee' 'lowpaymentfee.com':32,80 'maximum':117 'micropay':57 'name':199 'network':61 'offer':81 'on-chain':140 'openapi':175 'page':159 'paramet':192 'pay':10,24 'pay-per-call API' 'pay-per-request':9,23 'payload':212 'payment':46,118,137 'per':11,25,54,103 'per-request':53 'post':72,194 'post-method' 'premium':112 'prepar':219 'price':100,136,156 'product':4,18,37,40,208 'product data endpoint' 'product inventory API' 'product-inventory' 'prompt':166 'protocol':47 'provid':33,225 'render':161 'request':12,26,55,73,104 'request/response':178 'resourc':39 'respons':76 'return':74,202 'schema':176 'settl':139 'site':79,133 'span':90 'spars':153 'specif':106,207 'specifi':147 'structur':213 'suggest':200 'technic':170 'uniform':135 'unit':123 'unknown':215 'usdc':14,28,56,125,127 'usdc-micropayment' 'util':98 'via':43 'wallet':148,165 'x402':2,16,45,63,87 'x402 inventory endpoint' 'x402-gated':1,15,86 'x402-payment'","prices":[{"id":"3de6db50-8028-46ac-b4f8-5aa5bd8f2697","listingId":"92da17f5-c27e-4c49-b87c-1b811ac8a384","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/products/82/inventory","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:32.327Z"}],"sources":[{"listingId":"92da17f5-c27e-4c49-b87c-1b811ac8a384","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/82/inventory","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:32.327Z","lastSeenAt":"2026-04-22T20:00:28.175Z"}],"details":{"listingId":"92da17f5-c27e-4c49-b87c-1b811ac8a384","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/82/inventory \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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/products/82/inventory"},{"claim":"The site 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":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/products/82/inventory"}],"useCases":["Querying inventory levels for a specific product in an automated supply-chain workflow","Agent-driven commerce applications that need real-time stock data","Programmatic inventory checks without API key registration"],"bestFor":["Agents that can settle USDC payments on Base via x402","Quick, keyless access to product inventory data","Micropayment-friendly workflows needing per-call billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume bulk inventory queries where per-request pricing may add up","Applications requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:51:20.289Z"},"updatedAt":"2026-04-22T20:00:28.175Z"}}