{"id":"1831d671-e169-4742-8263-eec001413075","shortId":"wkVbW6","kind":"x402","title":"x402-gated account balance endpoint on Base, paid per-call in USDC.","tagline":"x402-gated account balance endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/accounts/39/balance`. It is part of a broader platform that offers dozens of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are gated via the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint probed (`/api/v1/accounts/39/balance`) returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call, consistent with the site's advertised flat $0.02/request pricing. Payment is made via the x402 `exact` scheme to the specified wallet address. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nThe exact purpose of the `/accounts/39/balance` endpoint is not documented beyond the generic \"Premium API Access\" label. Based on the path structure, it likely returns balance information for account ID 39, but no response schema, request body schema, or detailed documentation was found. The docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content. Without further documentation it is unclear what data this specific endpoint returns or what input it expects beyond a POST request.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","account-balance","json-response"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 paid endpoint","USDC micropayment API","Base network API","lowpaymentfee","pay-per-call API","crypto-gated API"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only a 'Connect wallet' prompt with no content.","The specific purpose of /api/v1/accounts/39/balance is undocumented; the path suggests account-specific balance data but this is inferred.","No response schema or example response is available.","No request body schema is documented; the endpoint accepts POST but required fields are unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/39/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/accounts/39/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no response schema, no request body schema, and no examples. The specific endpoint's purpose is unclear beyond its URL path. Docs pages are empty (wallet-connect only).","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T00:30:00.706Z","embedding":[-0.0037059784,0.003665924,0.04949951,0.0129776,0.022750854,-0.047302246,-0.014762878,0.021026611,0.06713867,-0.0657959,0.033843994,-0.049468994,-0.039001465,-0.039733887,0.0025806427,0.018341064,-0.016799927,0.017547607,-0.0619812,0.03390503,0.006996155,-0.021469116,-0.015129089,0.037719727,-0.013343811,-0.02722168,-0.011581421,-0.03112793,-0.032043457,-0.030685425,0.03274536,-0.023010254,-0.0041656494,0.016937256,0.012809753,-0.005882263,0.0030670166,0.033416748,0.031829834,-0.015045166,0.0036468506,-0.051513672,-0.0063591003,0.015357971,-0.03778076,-0.0070152283,0.015510559,-0.02268982,0.00077438354,-0.0017251968,-0.041534424,0.016555786,0.017211914,0.011993408,0.013786316,0.035491943,-0.013648987,-0.028717041,0.016952515,0.018478394,0.010726929,-0.05606079,-0.01108551,0.0029201508,0.027526855,0.05645752,-0.00076675415,0.054779053,-0.0016126633,0.04156494,0.019683838,0.07055664,0.021224976,0.011116028,0.00042200089,-0.028579712,0.014419556,0.019348145,-0.029571533,-0.0473938,-0.01739502,-0.026275635,-0.06274414,-0.009567261,-0.006046295,-0.04425049,-0.015792847,0.0074882507,-0.032684326,0.050872803,-0.08508301,-0.016616821,0.023223877,0.024032593,0.0045547485,-0.05117798,-0.007709503,0.017654419,-0.01802063,0.0055770874,0.01512146,-0.007698059,0.05041504,-0.010910034,0.057678223,0.0473938,0.022506714,0.015670776,-0.0011053085,-0.015487671,-0.015853882,-0.0056877136,0.009109497,-0.030685425,-0.0030937195,0.01789856,-0.020446777,0.011390686,-0.018371582,0.026031494,-0.037384033,0.06210327,0.026733398,-0.017562866,0.015411377,-0.046783447,-0.008934021,0.010726929,-0.033294678,0.0045547485,0.025054932,0.008865356,0.007183075,-0.024856567,-0.034088135,0.012237549,-0.010437012,-0.014442444,-0.0413208,-0.019989014,0.029525757,-0.015686035,0.025421143,0.0044822693,-0.09838867,-0.009490967,-0.035827637,0.024551392,-0.028961182,0.0039863586,-0.006038666,0.017288208,-0.017608643,-0.011154175,-0.019073486,-0.02281189,-0.002576828,0.025650024,0.01322937,0.057525635,0.006134033,0.01890564,0.033294678,0.007774353,0.03149414,0.04586792,-0.018356323,-0.061431885,-0.078308105,-0.019882202,-0.007965088,-0.010498047,-0.042877197,0.009552002,-0.015167236,-0.06262207,-0.018859863,-0.004432678,-0.031051636,-0.0231781,0.0017566681,-0.028289795,0.0048294067,-0.011222839,-0.05050659,-0.0118637085,-0.005065918,0.06414795,0.022277832,0.019729614,0.021636963,0.010536194,0.051361084,0.03125,-0.015396118,-0.033172607,0.0059127808,0.0069885254,0.011230469,0.014701843,0.021850586,-0.02784729,0.03161621,0.05340576,-0.014785767,-0.012145996,0.031066895,-0.05230713,-0.045532227,-0.027877808,0.019561768,-0.001912117,-0.002204895,0.013076782,-0.03463745,-0.01109314,0.0031166077,0.029937744,0.008880615,0.07232666,0.00062799454,0.017990112,0.02470398,0.019836426,-0.0552063,0.027801514,0.051452637,0.03781128,-0.015731812,-0.025482178,0.020751953,0.018737793,-0.02960205,-0.0113220215,-0.008811951,0.018203735,0.0013275146,0.025238037,0.047180176,-0.023117065,-0.006904602,-0.013381958,-0.000767231,0.023498535,0.014663696,-0.014823914,-0.034301758,-0.087524414,0.046966553,0.08129883,0.014213562,0.0011053085,0.0064201355,-0.042510986,-0.04953003,-0.055847168,0.039031982,0.053619385,-0.010345459,-0.03010559,0.045715332,-0.015609741,-0.032196045,-0.030517578,-0.009780884,0.00026726723,-0.011299133,-0.014076233,-0.069885254,0.02104187,0.0039482117,0.034942627,0.03665161,-0.003206253,-0.057525635,-0.018661499,0.019973755,0.00031733513,-0.023513794,-0.004425049,-0.007297516,0.024017334,0.019165039,0.005329132,0.013130188,-0.007144928,-0.016342163,0.0053100586,0.022033691,0.011795044,-0.026504517,0.0259552,0.011413574,-0.044281006,0.031311035,0.008346558,0.041656494,-0.032165527,0.03918457,-0.008407593,-0.0023403168,0.050598145,-0.0074768066,-0.049560547,0.021865845,-0.019561768,0.05606079,0.06488037,0.016479492,0.0009765625,0.0020599365,0.06628418,-0.008560181,0.004032135,0.027618408,0.021438599,0.03189087,-0.005947113,-0.0692749,-0.036071777,-0.009361267,-0.025253296,0.024612427,-0.01890564,0.023757935,0.009437561,0.018753052,-0.017349243,-0.0057868958,-0.023788452,0.00022673607,-0.019195557,0.0012168884,-0.031555176,-0.005420685,0.021942139,0.013015747,-0.0061531067,-0.019592285,0.0440979,0.011474609,-0.019332886,-0.018218994,-0.034332275,-0.024505615,-0.013900757,0.03237915,0.0039711,0.010871887,0.017028809,-0.025848389,-0.012939453,0.008522034,0.0030097961,0.048309326,0.0059547424,-0.003917694,-0.059509277,-0.058044434,-0.0146865845,-0.05215454,0.006164551,0.020248413,-0.000790596,0.07086182,-0.009239197,-0.0181427,-0.028579712,0.043121338,-0.03741455,0.004940033,0.027770996,-0.03778076,-0.0289917,0.0012626648,0.025024414,0.016525269,0.022277832,-0.0029087067,0.023864746,0.07684326,0.05682373,0.005001068,0.0132369995,0.039733887,0.021148682,-0.0069122314,-0.0033035278,-0.03262329,-0.009712219,0.028060913,-0.012580872,-0.021606445,-0.09301758,0.05731201,0.0152282715,0.08441162,0.00617218,0.013023376,0.037231445,-0.009819031,0.028137207,-0.04006958,-0.038024902,-0.04147339,-0.036132812,0.02053833,-0.018218994,0.010871887,-0.038391113,0.03086853,0.015525818,0.029876709,-0.038208008,0.066833496,-0.014801025,-0.020141602,0.020874023,0.0181427,0.043151855,0.045166016,-0.034118652,0.012184143,0.0023822784,-0.029251099,-0.009429932,0.032348633,-0.0007042885,-0.0061187744,-0.070617676,-0.015701294,0.015975952,-0.0107803345,-0.07873535,0.0003950596,0.010566711,0.0317688,0.025634766,-0.026260376,-0.02243042,0.0056381226,-0.019088745,-0.07556152,-0.011398315,-0.021408081,0.03250122,0.0309906,-0.04272461,0.018417358,0.009399414,0.010116577,-0.0072021484,0.0158844,-0.01008606,0.0025100708,-0.016647339,0.031982422,0.010719299,0.03225708,0.012825012,0.049957275,0.039154053,0.036895752,0.033569336,0.01121521,-0.007980347,-0.057739258,-0.002708435,-0.068359375,0.020462036,0.022567749,-0.02432251,0.023025513,0.004611969,-0.033721924,-0.007160187,-0.00031399727,-0.02204895,0.019058228,0.02645874,-0.0473938,-0.03604126,-0.044281006,-0.01424408,0.011802673,0.05581665,0.014816284,0.0076904297,-0.03086853,-0.013771057,0.01651001,0.0107040405,0.0033092499,-0.013595581,-0.006034851,-0.023391724,0.0009880066,-0.03994751,-0.0121154785,0.034423828,0.00340271,-0.007522583,0.020812988,-0.012054443,0.0014305115,-0.023406982,0.0055503845,0.036590576,-0.03552246,0.012321472,-0.013313293,0.027618408,-0.012229919,-0.03314209,-0.06378174,0.05041504,-0.004142761,0.0335083,-0.02986145,0.004673004,-0.00018465519,0.017822266,0.0016298294,-0.022750854,-0.002248764,0.009010315,-0.028411865,-0.09094238,0.04135132,-0.021148682,0.021499634,0.0038146973,-0.0043296814,0.030670166,-0.0017442703,0.014778137,0.027450562,-0.017227173,-0.008010864,-0.034301758,-0.029800415,-0.027038574,0.0023384094,-0.011680603,0.019561768,-0.010803223,0.019989014,-0.004825592,-0.023864746,0.026123047,-0.004169464,-0.0104599,0.029296875,-0.0070343018,-0.004081726,0.044555664,0.01473999,-0.054473877,0.042877197,0.00566864,0.0014095306,-0.015991211,0.058685303,0.013328552,-0.00075387955,0.009277344,-0.011505127,-0.0143966675,-0.015144348,-0.011810303,0.006549835,0.04421997,0.015106201,-0.047943115,0.016189575,0.011001587,-0.038085938,-0.010948181,0.024215698,0.017471313,-0.050933838,0.0042686462,0.01524353,0.029266357,-0.039398193,0.0037326813,-0.004573822,0.024398804,0.021591187,0.012924194,-0.004245758,0.013648987,-0.03152466,0.0209198,0.01676941,-0.028884888,-0.021743774,-0.010360718,0.032440186,0.01802063,0.009925842,-0.012062073,-0.012191772,-0.018981934,0.0058403015,-0.022003174,0.013923645,0.0011892319,0.010902405,-0.012336731,0.006210327,0.03173828,-0.045898438,0.0074310303,-0.010047913,0.034576416,0.011436462,-0.007572174,0.027877808,0.0016517639,0.0368042,-0.033416748,-0.023498535,-0.012580872,-0.0024929047,-0.010246277,-0.054779053,-0.01586914,-0.01158905,0.031463623,-0.0059165955,-0.0016174316,0.03466797,-0.0008339882,-0.0008711815,0.012863159,0.010314941,-0.016082764,0.0008125305,-0.046447754,-0.0067100525,-0.022460938,-0.00843811,-0.015472412,0.019958496,-0.034606934,-0.027069092,0.0042495728,-0.013053894,0.005191803,-0.00680542,-0.012077332,0.025497437,-0.012413025,0.008911133,-0.008468628,-0.023590088,-0.009735107,0.00472641,0.021591187,-0.06225586,0.010818481,-0.0030403137,-0.00356102,-0.01322937,-0.000957489,0.017913818,0.0002989769,0.020980835,0.039520264,-0.038116455,0.029525757,-0.019760132,0.0007157326,-0.0025558472,-0.0039901733,-0.006881714,-0.022491455,-0.012573242,0.04019165,-0.0013217926,-0.010108948,-0.016357422,-0.03427124,-0.014518738,-0.049926758,0.03475952,0.011886597,0.05255127,-0.025970459,-0.0035572052,0.018707275,0.012283325,-0.0015773773,-0.0143966675,-0.0045394897,0.014892578,0.006385803,0.0029411316,-0.028762817,-0.025161743,-0.0061798096,0.0031089783,-0.043701172,-0.057769775,-0.011146545,0.02029419,0.008224487,-0.017807007,-0.023452759,-0.02168274,-0.013977051,-0.02243042,0.011894226,-0.009414673,0.020019531,0.0047454834,-0.017669678,0.008018494,-0.0047912598,-0.025283813,0.02482605,0.00299263,-0.011245728,-0.015106201,-0.005844116,0.019012451,0.00315094,-0.0020484924,-0.019332886,-0.012550354,-0.013542175,-0.064453125,0.020507812,-0.008552551,0.021072388,-0.005531311,-0.011520386,-0.04284668,-0.018737793,-0.013961792,-0.009590149,0.009124756,0.0020446777,0.017974854,0.016845703,0.0023059845,-0.005847931,-0.02243042,-0.021774292,0.0065460205,0.0095825195,-0.005870819,0.009315491,0.053466797,-0.0017213821,-0.020553589,-0.0021743774,-0.00072431564,0.020935059,-0.025512695,0.0012207031,0.0022068024,0.024490356,-0.014419556,-0.020462036,-0.04046631,-0.003332138,0.052368164,-0.015899658,-0.011878967,-0.016830444,0.014343262,0.010650635,0.046569824,-0.031463623,0.028640747,-0.025360107,0.027999878,-0.017837524,0.031921387,0.0022525787,0.045532227,-0.027008057,-0.042114258,0.005657196,0.034210205,-0.023742676,-0.06744385,-0.014091492,-0.062805176,-0.01146698,-0.021881104,-0.023406982,0.010238647,-0.009384155,-0.02998352,-0.079589844,0.0071640015,0.044708252,0.008399963,0.01876831,-0.002840042,0.014152527,0.015281677,-0.023605347,-0.03086853,0.021118164,-0.02268982,-0.004245758,-0.02130127,0.026046753,-0.011474609,-0.031143188,0.017166138,0.00076007843,0.015487671,-0.016693115,0.005508423,-0.02243042,-0.0015144348,-0.008880615,0.008262634,-0.0039596558,-0.011451721,0.030899048,-0.04925537,0.02255249,-0.000104010105,0.008995056,0.011398315,0.01713562,0.019058228,-0.031982422,-0.011856079,0.012565613,0.0002565384,0.024917603,-0.017745972,0.0418396,0.013938904,-0.003786087,0.013572693,-0.022232056,0.009223938,-0.04196167,-0.02861023,0.026123047,-0.019989014,0.0038642883,-0.012283325,0.004802704,0.0077934265,0.00033664703,-0.015151978,-0.019332886,-0.002708435,-0.008552551,0.019744873,-0.0018138885,0.035461426,0.004966736,0.021362305,0.039398193,0.03829956,0.00920105,-0.00069475174,-0.00014400482,0.013137817,-0.02357483,-0.0011997223,0.0022010803,0.02822876,0.008491516,0.020095825,0.02217102,-0.036590576,-0.022369385,0.0008368492,-0.024520874,0.011436462,-0.020492554,0.0066719055,0.004875183,0.013404846,-0.01727295,-0.04257202,-0.0024318695,-0.018310547,-0.014472961,-0.0048561096,0.0010910034,-0.0060653687,0.013580322,0.0033130646,0.0063285828,-0.01260376,0.0231781,-0.021911621,-0.0046844482,0.024627686,0.05117798,0.0042648315,-0.018539429,-0.00024724007,0.00029993057,-0.006702423,0.0013685226,0.005809784,0.012130737,0.0289917,-0.0007777214,0.0184021,-0.011314392,0.051818848,-0.011459351,0.0154953,-0.0050086975,0.005744934,0.008880615,0.044311523,-0.030136108,0.009971619,0.011360168,-0.0178833,-0.006790161,-0.012359619,-0.01386261,0.016937256,0.0078125,-0.021911621,0.018722534,0.023513794,0.021621704,-0.03112793,-0.0032176971,0.0015945435,-0.046966553,-0.021728516,0.008605957,-0.00756073,-0.008842468,0.017227173,-0.02482605,0.011100769,-0.034179688,0.020828247,0.0045051575,0.027038574,-0.012207031,-0.023895264,-0.01158905,-0.017211914,-0.027618408,0.018295288,0.0006432533,0.045654297,0.02494812,0.021133423,0.021011353,0.026611328,0.003211975,-0.045013428,-0.013061523,0.017532349,-0.0049858093,0.025619507,-0.021377563,0.02520752,0.066345215,-0.00045347214,0.02520752,0.04220581,0.028213501,-0.023254395,0.012931824,-0.0085372925,0.0074691772,-0.017105103,0.020095825,-0.012939453,0.03717041,-0.020721436,0.021392822,-0.0029945374,0.028839111,-0.030532837,0.019927979,0.07006836,0.026763916,-0.009902954,0.024337769,-0.0115356445,-0.022323608,-0.008644104,-0.025802612,0.048950195,0.0032405853,0.033691406,0.024215698,0.0104599,-0.024169922,0.039276123,-0.008155823,-0.030014038,0.05239868,0.006439209,-0.010398865,-0.012313843,-0.0095825195,0.019836426,-0.053710938,-0.026000977,0.023010254,-0.01309967,0.005672455,-0.0031967163,0.015258789,0.0058898926,0.008583069,0.0050582886,0.020645142,-0.025756836,0.0058937073,0.017562866,0.003780365,0.016189575,0.017532349,0.033691406,-0.026397705,-0.012039185,0.0068626404,0.015930176,0.009773254,-0.0045776367,0.029037476,0.02104187,0.043121338,0.04156494,-0.022827148,0.0052108765,0.036224365,0.0030670166,-0.003528595,0.04949951,0.01020813,0.020355225,0.036071777,0.032836914,0.025878906,-0.026000977,0.01424408,-0.0017118454,0.0006132126,-0.020858765,-0.005756378,0.023742676,-0.011276245,0.02658081,-0.005180359,0.0022220612,0.014816284,0.032806396,-0.0036373138,-0.004306793,0.011871338,0.00028944016,-0.011695862,-0.0057640076,-0.001405716,-0.01889038,0.0050468445,0.014518738,0.029251099,-0.045166016,0.018463135,0.009094238,-0.012870789,-0.012336731,0.015960693,-0.055755615,0.0053977966,0.0018806458,-0.014976501,-0.03265381,0.010314941,0.009140015,-0.0004041195,0.032440186,0.0039787292,0.0062332153,0.008331299,0.019485474,0.03793335,0.009437561,-0.0037136078,-0.017837524,0.004798889,0.028884888,-0.0149002075,-0.0068626404,-0.03552246,0.0048103333,0.025817871,-0.01739502,-0.018966675,0.002729416,-0.0062332153,-0.02407837,-0.0062065125,0.0463562,0.014587402,0.028717041,-0.008659363,-0.011810303,-0.008430481,0.047912598,0.0033283234,-0.019363403,-0.022781372,0.013214111,-0.019042969,0.045532227,0.050445557,-0.011886597,0.001490593,-0.0024929047,-0.020324707,-0.0040893555,-0.02331543,0.017608643,-0.027496338,0.010513306,0.00983429,0.010971069,-0.037078857,-0.011123657,-0.009628296,-0.035369873,-0.0209198,-0.012939453,0.00049066544,0.0048217773,0.032409668,0.012580872,0.026306152,-0.016494751,0.0619812,-0.005138397,0.05895996,0.00021743774,-0.0041046143,0.037231445,0.025604248,0.023223877,0.008636475,0.027679443,-0.019546509,0.0032138824,0.019638062,0.007144928,0.0053977966,0.009483337,-0.013519287,0.03781128,-0.023925781,0.028060913,-0.0076408386,-0.008834839,0.015487671,-0.018676758,-0.007835388,0.0061187744,-0.010261536,-0.0068855286,0.041534424,-0.015319824,-0.015045166,-0.009712219,-0.015472412,0.024642944,-0.0063056946,0.0044441223,-0.00040221214,-0.017669678,0.020553589,-0.01651001,-0.02041626,0.005882263,0.016113281,-0.038604736,-0.018005371,0.0038871765,0.022659302,-0.029937744,0.036499023,0.033050537,-0.013847351,-0.0010890961,0.054595947,-0.010864258,0.029296875,-0.0032310486,0.05596924,0.03704834,0.004890442,-0.0070152283,0.022842407,0.023254395,-0.016113281,0.014915466,0.050750732,0.0011482239,0.01184845,-0.0073509216,-0.02571106,0.0036716461,-0.004699707,-0.023864746,0.0014533997,-0.02708435,-0.006778717,0.002243042,0.018295288,-0.012252808,0.010047913,-0.0019340515,-0.020614624,0.004840851,0.046020508,0.01638794,-0.042175293,-0.0035533905,0.010124207,0.015068054,-0.026306152,-0.012550354,0.0059890747,-0.04321289,-0.008323669,0.034057617,0.0032691956,0.0005226135,-0.019470215,-0.008781433,0.051452637,0.013381958,0.005760193,0.012680054,-0.016296387,0.03314209,-0.0020256042,0.009277344,-0.0031585693,-0.009643555,-0.013824463,0.017944336,-0.012527466,-0.013305664,0.009422302,0.006931305,0.0101623535,0.011413574,0.0050239563,0.0287323,-0.01864624,-0.009971619,0.010269165,0.015731812,-0.029251099,-0.03778076,-0.017288208,0.033203125,0.04876709,-0.02986145,-0.015472412,-0.017593384,0.024841309,0.030715942,0.036743164,-0.004386902,0.04397583,0.0044517517,-0.0034370422,-0.027923584,0.017410278,0.008270264,-0.023803711,0.022399902,-0.027191162,-0.0052757263,-0.0036621094,0.021057129,0.0073547363,-0.016418457,-0.01574707,-0.012588501,-0.000995636,0.013168335,-0.028259277,0.009208679,-0.028961182,-0.014282227,0.021453857,0.009605408,-0.018859863,-0.042419434,-0.010002136,-0.00630188,-0.05758667,0.0110321045,-0.024673462,-0.01322937,-0.020080566,0.0062828064,-0.014190674,0.03265381,-0.00013649464,0.0041770935,0.010498047,0.026382446,0.0011768341,-0.008781433,0.028945923,-0.019424438,-0.018218994,-0.0019798279,-0.0014486313,-0.004497528,0.029251099,-0.027770996,0.03213501,0.008735657,-0.0055389404,0.0025806427,-0.00844574,-0.013420105,0.009971619,-0.050476074,-0.014053345,0.013496399,0.016967773,-0.0015392303,-0.007007599,0.05859375,-0.024490356,-0.01889038,0.031585693,0.05001831,0.003004074,0.068237305,-0.027160645,-0.008323669,-0.03338623,-0.009597778,-0.004196167,0.015045166,0.0024261475,0.01927185,0.0011615753,0.02281189,0.011177063,-0.014533997,-0.021057129,0.030685425,0.020141602,-0.008666992,0.0418396,0.013923645,-0.00007724762,-0.024276733,-0.00806427,0.01210022,0.032470703,0.018508911,0.015411377,-0.024017334,0.018051147,-0.013442993,0.012687683,0.032958984,-0.029296875,-0.04348755,-0.009986877,-0.02444458,0.013496399,0.0012817383,0.0072746277,-0.004611969,0.004852295,-0.04071045,-0.024398804,-0.029571533,0.017700195,0.015151978,-0.0022449493,0.0018196106,0.0032234192,0.005970001,-0.040496826,0.0011053085,-0.04272461,-0.017623901,-0.00027513504,-0.019927979,0.025222778,0.006225586,-0.010795593,0.004798889,0.0024204254,-0.011428833,0.0037956238,0.031311035,-0.0154953,-0.0044403076,0.03060913,0.013153076,-0.013137817,-0.004207611,-0.00894928,-0.0020999908,0.032226562,0.017242432,0.009429932,-0.0058670044,0.012001038,0.012283325,-0.003446579,0.03173828,-0.005622864,0.02279663,-0.032470703,-0.010040283,-0.0030879974,-0.010345459,0.02911377,-0.005584717,-0.024459839,-0.012939453,-0.009048462,-0.023895264,0.01210022,0.012527466,0.032836914,-0.010032654,0.04244995,-0.012062073,-0.0236969,0.017089844,0.007843018,-0.024673462,-0.0067329407,0.02281189,0.00907135,0.028076172,0.0036468506,0.0055885315,-0.021347046,-0.01159668,-0.00029444695,-0.015434265,-0.017929077,-0.012969971,0.019378662,0.019592285,0.003709793,0.012802124,0.03112793,0.006702423,0.031585693,0.008552551,0.062438965,0.027755737,-0.023971558,0.0066452026,0.008605957,-0.02532959,-0.010025024,-0.0049743652,0.011932373,-0.028182983,-0.0037136078,0.0075950623,0.029556274,-0.019317627,0.013153076,-0.01260376,-0.016036987,-0.05392456,-0.005657196,-0.048187256,0.014976501,0.029251099,0.021148682,0.020950317,0.014190674,-0.036102295,0.012199402,0.028808594,0.0017881393,-0.035583496,-0.016326904,0.0035381317,0.011940002,0.017837524,0.018417358,-0.0395813,-0.016418457,0.008468628,0.011772156,0.007446289,-0.019729614,0.024475098,0.03933716,-0.012374878,-0.018707275,0.021942139,0.01234436,-0.0015592575,0.010429382,0.017471313,0.031341553,0.040008545,0.0068092346,0.023025513,0.0209198,-0.029754639,0.054382324,-0.011833191,0.023376465,-0.021530151,-0.016586304,-0.033050537,-0.012374878,-0.00057411194,0.0025577545],"createdAt":"2026-04-18T18:39:37.167Z","updatedAt":"2026-04-28T08:04:42.732Z","lastSeenAt":"2026-04-28T08:04:42.732Z","tsv":"'/accounts/39/balance':167 '/api/v1/accounts/39/balance':42,95 '/request':121 '0.02':109,120 '000':104 '20':103 '39':192 '402':98 'Base network API' 'USDC micropayment API' 'access':37,147,177 'account':4,18,190 'account balance API' 'account-balance' 'address':135 'advertis':118,138 'ai/ml':65 'analyt':64 'api':36,61,140,176,208 'attach':150 'balanc':5,19,187 'base':8,22,89,105,179 'base-network' 'beyond':172,240 'bodi':198 'broader':48 'call':12,26,112 'caller':148 'challeng':99 'connect':216 'consist':113 'content':222 'crypto-gated API' 'data':63,68,230 'detail':201 'doc':206 'document':171,202,225 'dozen':52 'endpoint':6,20,30,73,93,168,233 'exact':129,163 'expect':239 'finance/web3':67 'flat':119 'found':204 'gate':3,17,78 'generic':174 'header':155 'id':191 'infer':66 'inform':188 'input':237 'instant':146 'json-response' 'key':141 'label':178 'like':185 'limit':144 'lowpaymentfee' 'lowpaymentfee.com':32 'made':125 'network':90 'offer':51 'page':211 'paid':9,23 'part':45 'path':41,182 'pay':58 'pay-per-call API' 'pay-per-request':57 'payment':82,123,154,160 'per':11,25,59,111 'per-cal':10,24 'platform':49,76,137 'post':242 'premium':35,175 'price':122,207 'probe':94 'prompt':218 'proof':161 'protocol':56,83 'provid':33 'purpos':164 'rate':143 'readm':210 'render':213 'request':60,100,197,243 'resourc':38 'respons':195 'return':96,186,234 'schema':196,199 'scheme':130 'servic':71 'settl':84 'simpli':149 'site':116 'span':62 'specif':92,232 'specifi':133 'structur':183 'substant':221 'unclear':228 'unit':106 'usd':110 'usdc':14,28,86,108 'usdc-settlement' 'util':70 'valid':158 'via':79,126 'wallet':134,217 'without':223 'x':153 'x-payment':152 'x402':2,16,55,81,128,159 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':54","prices":[{"id":"f24892b3-8193-42b1-adef-7972183e7e9a","listingId":"1831d671-e169-4742-8263-eec001413075","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/accounts/39/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":"2026-04-18T18:39:37.167Z"}],"sources":[{"listingId":"1831d671-e169-4742-8263-eec001413075","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/39/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:37.167Z","lastSeenAt":"2026-04-28T08:04:42.732Z"}],"details":{"listingId":"1831d671-e169-4742-8263-eec001413075","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/39/balance \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","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 (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/39/balance"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/39/balance"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating x402-compatible agents that pay for API access on-the-fly","Accessing paid data endpoints without API key registration"],"bestFor":["Agents or applications that support x402 payment protocol","Users who want keyless, pay-per-use API access","Developers building on Base network with USDC settlement"],"notFor":["Users who need detailed API documentation or response schemas before integrating","Applications requiring free or subscription-based access models","Use cases needing high-throughput batch queries (no documented rate limits, but per-call payment adds overhead)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.43Z"},"updatedAt":"2026-04-28T08:04:42.732Z"}}