{"id":"956059dc-35b7-482a-a445-5f3f9eda9c17","shortId":"BQMjVH","kind":"x402","title":"Check BCH wallet balances via x402 micropayment — $0.02 per request on Base.","tagline":"Check BCH wallet balances via x402 micropayment — $0.02 per request on Base.","description":"This endpoint at lowpaymentfee.com returns Bitcoin Cash (BCH) wallet balance data, gated behind the x402 payment protocol. Each call costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.\n\nThe provider operates a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing and x402 payment model settled in USDC on Base.\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 spec, no request/response schema, and no usage examples available from the crawled material. The specific input parameters (e.g., whether a BCH address is passed in the POST body or as a path parameter) and the response format are unknown. The endpoint is confirmed live, returning a proper 402 challenge on unauthenticated POST requests.","tags":[],"capabilities":["bch-wallet-balance","x402-payment","usdc-base-settlement","pay-per-request","no-api-key","crypto-balance-lookup"],"categories":["crypto","finance"],"synonyms":["bitcoin cash balance","BCH balance API","crypto wallet balance","BCH address lookup","blockchain balance check","x402 crypto API","micropayment API"],"warnings":["No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response — input parameters are unknown","Request body format in the example is entirely guessed; actual required fields are undocumented","The broader provider lists many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/BCH/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/BCH/balance","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 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation, no request/response schema, and no examples. The request and response formats are entirely inferred. This is effectively a stub 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'0.02':8,20,45,130 '000':47 '20':46 '402':215 '6':59 'BCH address lookup' 'BCH balance API' 'access':84 'address':189 'ai/ml':102 'analysi':105 'analyt':101 'api':62,98,150 'attach':71 'avail':176 'balanc':4,16,34 'base':12,24,48,54,141 'bch':2,14,32,188 'bch-wallet-balance' 'behind':37 'bitcoin':30 'bitcoin cash balance' 'blockchain balance check' 'bodi':195 'broader':91 'call':43,97 'caller':69 'cash':31 'challeng':216 'check':1,13 'classif':107 'confirm':210 'connect':156 'convers':123 'cost':44 'crawl':179 'crypto wallet balance' 'crypto-balance-lookup' 'data':35,100 'decim':60 'detail':163 'doc':147 'document':142 'e.g':185 'embed':108 'endpoint':26,126,208 'estim':117 'exampl':175 'exchang':112 'extrem':144 'feed':111 'finance/web3':109 'format':204 'gas':116 'gate':36 'generat':124 'geocod':121 'header':76 'infer':103 'infrastructur':119 'input':183 'key':63 'limit':66 'live':211 'lowpaymentfee.com':28 'materi':180 'micropay':7,19 'micropayment API' 'model':136 'network':55 'no-api-key' 'openapi':167 'oper':89 'page':151 'paramet':184,200 'pass':191 'path':199 'pay':95 'pay-per-cal':94 'pay-per-request' 'payment':40,75,81,135 'per':9,21,96 'post':194,219 'price':110,132,148 'prompt':158 'proof':82 'proper':214 'protocol':41 'provid':88 'quot':115 'rate':65,113 'render':153 'request':10,22,220 'request/response':170 'requir':68 'resourc':86 'respons':203 'return':29,212 'schema':171 'sentiment':104 'settl':137 'share':127 'simpli':70 'span':99 'spars':145 'spec':168 'specif':182 'suit':92 'summar':106 'technic':162 'token':114 'unauthent':218 'unit':49 'unknown':206 'usag':174 'usdc':51,57,139 'usdc-base-settlement' 'util':120 'valid':79,122 'via':5,17 'wallet':3,15,33,157 'whether':186 'x':74 'x-payment':73 'x402':6,18,39,80,134 'x402 crypto API' 'x402-payment'","prices":[{"id":"43438955-fee5-42b7-baae-dbe8663c1ae4","listingId":"956059dc-35b7-482a-a445-5f3f9eda9c17","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/BCH/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":"2026-04-18T19:28:14.851Z"}],"sources":[{"listingId":"956059dc-35b7-482a-a445-5f3f9eda9c17","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/BCH/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:14.851Z","lastSeenAt":"2026-04-23T12:32:02.972Z"}],"details":{"listingId":"956059dc-35b7-482a-a445-5f3f9eda9c17","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/BCH/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{\"address\": \"bitcoincash:qr...\"}'","exampleRequest":{"address":"bitcoincash:qr5cyxhumamhpnmrqfhaqgevmknfuq2csczjpmnmz"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/BCH/balance"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) which equals $0.02","source_url":"https://lowpaymentfee.com/api/v1/wallet/BCH/balance"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages render only a 'Connect wallet' prompt with no technical documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Checking BCH wallet balances programmatically without API key registration","Integrating BCH balance lookups into agent workflows that support x402 payments","Building dashboards or bots that monitor Bitcoin Cash addresses"],"bestFor":["Agents or apps that already support x402 payment protocol","Quick one-off BCH balance checks without account setup","Developers wanting pay-per-use crypto data with no rate limits"],"notFor":["High-volume BCH balance monitoring where $0.02/call adds up quickly","Users needing detailed BCH transaction history or UTXO data (not evidenced)","Anyone requiring comprehensive API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.785Z"},"updatedAt":"2026-04-23T12:32:02.972Z"}}