{"id":"99cbd982-7460-44c1-b5de-6aa0a6eda338","shortId":"2nmUwr","kind":"x402","title":"x402-gated account balance endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated account balance endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/111/balance` is gated behind an x402 challenge requiring payment in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request, settled in USDC on Base via the x402 protocol. The platform advertises no API keys, no rate limits, and instant access.\n\nHowever, documentation is essentially nonexistent — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the account balance endpoint actually returns or what inputs it expects beyond a POST request. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to assess the actual utility or data quality of the response.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","micropayment API"],"warnings":["Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no actual content","No OpenAPI or schema available — request format and response structure are unknown","The specific endpoint path '/api/v1/accounts/111/balance' with a hardcoded account ID '111' is unusual and may be a demo or placeholder","No information on what data source backs the account balance response"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/111/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/111/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 challenge, but documentation is effectively absent — all doc pages show only 'Connect wallet'. No OpenAPI schema, no request/response examples, and no description of what the balance endpoint actually returns. The listing is essentially a stub with confirmed liveness.","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":"2026-04-19T01:04:06.545Z","embedding":[-0.02293396,0.005542755,0.038482666,0.015731812,0.014335632,-0.040283203,-0.0052375793,0.0050354004,0.084228516,-0.05734253,0.03945923,-0.07299805,-0.047576904,-0.03543091,-0.0044784546,0.02279663,-0.029052734,0.020553589,-0.05908203,0.03643799,0.013031006,-0.024261475,-0.015007019,0.039611816,-0.022567749,-0.024734497,-0.004676819,-0.02305603,-0.03387451,-0.035064697,0.051239014,-0.021743774,-0.008453369,0.010543823,0.008666992,0.013786316,0.015068054,0.03125,0.043182373,-0.01663208,-0.014801025,-0.04562378,0.0046463013,-0.0026988983,-0.027709961,0.006565094,0.015609741,-0.019180298,0.011604309,-0.020004272,-0.058410645,0.013870239,0.019302368,0.012046814,0.013153076,0.025131226,-0.007987976,-0.022384644,0.008842468,0.037384033,-0.0090789795,-0.059295654,-0.010871887,-0.0026073456,0.0056381226,0.043670654,0.008071899,0.0357666,-0.014732361,0.05996704,0.019546509,0.05722046,0.03149414,0.0037517548,0.0002567768,-0.024459839,0.008552551,0.030212402,-0.021347046,-0.038024902,-0.009651184,-0.026000977,-0.08996582,-0.017303467,-0.00819397,-0.043670654,-0.029205322,-0.00033664703,-0.033081055,0.049743652,-0.083862305,-0.008857727,0.017700195,0.026260376,0.013282776,-0.037231445,0.0043945312,0.0317688,0.0041046143,0.0019512177,0.002401352,-0.012519836,0.037872314,-0.019500732,0.051879883,0.04727173,0.009353638,0.008018494,0.0020427704,0.0016212463,-0.029953003,-0.013801575,-0.010765076,-0.041992188,-0.0069465637,0.004951477,-0.032562256,0.00806427,-0.01626587,0.012771606,-0.033996582,0.078063965,0.01411438,0.0037384033,0.031341553,-0.057861328,-0.011039734,0.019851685,-0.046203613,0.008399963,0.036956787,-0.0032043457,0.009521484,-0.016326904,-0.053253174,0.021484375,-0.027404785,-0.013069153,-0.034942627,-0.003320694,0.022888184,-0.017578125,0.015380859,0.0121154785,-0.09625244,-0.0051574707,-0.030273438,0.01260376,-0.028427124,-0.0009994507,0.015602112,0.021835327,-0.0025157928,-0.01637268,-0.013374329,-0.026748657,-0.0034446716,0.02848816,-0.0010528564,0.05444336,0.01084137,0.03036499,0.041748047,0.0063667297,0.014762878,0.035095215,-0.012481689,-0.07220459,-0.07720947,-0.018035889,0.007419586,-0.031463623,-0.02835083,0.0037117004,-0.027450562,-0.057281494,-0.0041275024,-0.0005955696,-0.026977539,-0.026260376,0.0022182465,-0.0048980713,0.0138549805,-0.012748718,-0.061309814,-0.019210815,-0.0012216568,0.05444336,0.030654907,0.019546509,0.002840042,0.015419006,0.048065186,0.035247803,-0.011940002,-0.022644043,0.015792847,-0.0076560974,0.02268982,0.005290985,0.025482178,-0.02420044,0.022491455,0.036132812,-0.015655518,-0.025802612,0.021087646,-0.052978516,-0.051727295,-0.026489258,0.012130737,0.006340027,-0.008384705,0.02520752,-0.04006958,-0.012870789,0.009727478,0.027786255,0.010650635,0.0680542,0.008003235,0.01576233,0.011886597,0.01512146,-0.052368164,0.03677368,0.043395996,0.0178833,-0.0028457642,-0.033721924,0.025772095,0.024795532,-0.016174316,-0.0033111572,0.002155304,0.016296387,0.002609253,0.013038635,0.030471802,-0.00033903122,-0.0043754578,-0.015289307,-0.010772705,0.006378174,0.005218506,-0.016311646,-0.042266846,-0.08496094,0.046691895,0.047058105,0.024383545,0.008605957,0.01209259,-0.015007019,-0.03237915,-0.059387207,0.044128418,0.05206299,-0.008613586,-0.032165527,0.021743774,-0.010414124,-0.029800415,-0.022109985,-0.01878357,-0.027572632,-0.026550293,-0.0058059692,-0.07720947,0.023605347,0.018218994,0.036956787,0.04888916,0.0012216568,-0.052612305,-0.022323608,0.00680542,0.0074768066,-0.02734375,-0.0020256042,-0.019363403,0.021987915,0.015838623,0.005077362,0.01461792,0.00166893,-0.018859863,-0.0096206665,0.025497437,0.006881714,-0.018508911,0.028640747,0.0027828217,-0.042999268,0.01727295,0.008163452,0.05142212,-0.038970947,0.032806396,-0.01461792,0.0037612915,0.04940796,-0.016342163,-0.0496521,0.017532349,0.002298355,0.050079346,0.0592041,0.018127441,0.0058555603,-0.0124435425,0.05670166,-0.008422852,-0.006324768,0.01902771,0.024032593,0.035064697,-0.012138367,-0.07409668,-0.04736328,-0.00793457,-0.039215088,0.01928711,-0.02041626,0.014167786,-0.0029850006,0.026229858,-0.018936157,-0.0038166046,-0.046203613,-0.012779236,-0.03137207,0.014419556,-0.02444458,-0.022918701,0.024856567,0.017150879,0.003370285,0.00869751,0.046905518,0.021697998,-0.022506714,-0.0025691986,-0.020446777,-0.016433716,-0.025543213,0.025436401,-0.0013847351,0.023345947,0.031677246,-0.030395508,0.015777588,0.026229858,0.009803772,0.043670654,-0.0005903244,-0.015197754,-0.05279541,-0.042419434,-0.027297974,-0.043304443,0.010871887,0.011169434,-0.011955261,0.04446411,0.00015413761,-0.011932373,-0.041931152,0.025558472,-0.034729004,0.006893158,0.023239136,-0.03643799,-0.029174805,-0.018661499,0.009170532,0.015609741,0.031097412,0.01260376,0.024124146,0.0847168,0.03942871,0.01398468,0.0029506683,0.03286743,0.031463623,-0.0134887695,-0.0013570786,-0.025970459,-0.021896362,0.033355713,-0.023040771,-0.03161621,-0.07684326,0.06402588,0.0043525696,0.066345215,0.014320374,0.013916016,0.022003174,-0.002035141,0.021514893,-0.058929443,-0.0317688,-0.02748108,-0.039978027,0.029647827,-0.009735107,0.012542725,-0.028671265,0.03286743,0.0048294067,0.015609741,-0.040374756,0.05303955,-0.015098572,-0.021652222,0.030654907,0.010658264,0.044891357,0.06188965,-0.036743164,0.009239197,0.011672974,-0.026306152,-0.004486084,0.028671265,-0.011405945,-0.029678345,-0.06768799,-0.010894775,0.008934021,-0.015007019,-0.062347412,-0.0015983582,0.018035889,0.02458191,0.024429321,-0.016082764,-0.031555176,0.0014266968,-0.01651001,-0.08190918,0.00093221664,-0.019592285,0.01914978,0.022399902,-0.02897644,0.026931763,-0.002708435,0.012649536,-0.0042533875,0.03112793,0.0025081635,0.008644104,-0.023712158,0.029418945,0.010253906,0.012313843,0.0067596436,0.048339844,0.024551392,0.015312195,0.04421997,0.027572632,-0.0009717941,-0.06738281,0.02079773,-0.05871582,0.020812988,0.02859497,-0.046203613,-0.0007481575,-0.0011377335,-0.044799805,-0.002506256,0.015014648,-0.02961731,0.007881165,0.02998352,-0.032348633,-0.039154053,-0.04144287,-0.021896362,0.00356102,0.062194824,0.0011692047,0.012672424,-0.04119873,-0.011871338,0.021987915,0.010055542,0.020568848,-0.01424408,-0.023666382,-0.038238525,-0.014877319,-0.032287598,-0.012550354,0.034301758,-0.004886627,-0.015701294,0.01133728,-0.001127243,0.010520935,-0.010421753,0.009254456,0.014823914,-0.028671265,0.005710602,-0.0006451607,0.035858154,-0.0056037903,-0.03842163,-0.056243896,0.037261963,0.009735107,0.035369873,-0.036224365,0.0071029663,0.012321472,0.0075798035,0.0016078949,-0.015914917,-0.0008010864,0.008277893,-0.025497437,-0.07348633,0.03717041,-0.013595581,0.029769897,0.014694214,-0.0073280334,0.029052734,-0.012001038,0.013160706,0.010139465,-0.031311035,-0.0051498413,-0.039855957,-0.019134521,-0.022720337,0.0023460388,-0.010948181,0.021438599,-0.019485474,0.02368164,-0.003780365,-0.021072388,0.029205322,0.0023651123,0.0050811768,0.01739502,-0.0074691772,0.004627228,0.042816162,0.021987915,-0.05810547,0.041229248,0.0016593933,0.004055023,-0.015602112,0.053497314,0.021606445,-0.014976501,0.00038599968,-0.024719238,-0.0014219284,-0.023010254,-0.0058174133,0.0016231537,0.0418396,0.018798828,-0.05255127,0.028381348,0.012771606,-0.02897644,-0.022354126,0.024841309,0.025985718,-0.048736572,0.008468628,0.004211426,0.038970947,-0.04348755,0.0038280487,0.012268066,0.037384033,0.023010254,0.018966675,0.0075149536,0.012626648,-0.0178833,0.012367249,0.0016784668,-0.024520874,-0.025466919,-0.00844574,0.032104492,0.012138367,0.002746582,0.0017719269,-0.014579773,-0.012893677,0.0053520203,-0.013877869,0.02835083,0.018341064,0.021133423,-0.013999939,0.007549286,0.037902832,-0.037719727,-0.017425537,0.012367249,0.035369873,-0.0067443848,-0.004940033,0.039520264,0.006385803,0.033050537,-0.041900635,-0.021942139,0.00017559528,0.012969971,-0.010955811,-0.07269287,-0.02809143,-0.01914978,0.03451538,-0.011329651,0.0059814453,0.026046753,-0.002614975,0.0059165955,0.01121521,0.020980835,-0.020477295,-0.0008611679,-0.056152344,-0.014022827,-0.0137786865,-0.013763428,-0.039520264,0.020492554,-0.04095459,-0.035491943,0.0067329407,-0.02128601,0.006336212,0.006412506,-0.005558014,0.03744507,-0.014335632,0.01171875,-0.0026226044,-0.034210205,-0.0066833496,-0.00042653084,0.024612427,-0.05883789,0.019073486,-0.009849548,-0.00504303,-0.01235199,-0.010261536,0.023498535,0.008178711,0.018249512,0.031066895,-0.05645752,0.030685425,-0.036376953,-0.0020332336,-0.00089645386,-0.01235199,-0.009086609,-0.029754639,-0.014602661,0.03579712,-0.009437561,-0.009292603,-0.027755737,-0.036468506,-0.029342651,-0.047180176,0.033691406,0.028274536,0.044830322,-0.024291992,-0.009552002,0.0070495605,0.016036987,-0.0024871826,-0.018081665,-0.0024318695,0.019744873,0.015419006,0.011795044,-0.034576416,-0.026565552,-0.024932861,0.0013961792,-0.046722412,-0.0473938,-0.00027680397,0.019760132,0.0060043335,-0.022537231,-0.028045654,-0.022262573,-0.00059604645,-0.027893066,0.006038666,-0.0002875328,0.020874023,-0.0056762695,-0.018188477,0.010612488,0.010757446,-0.026824951,0.043121338,0.010765076,-0.011222839,-0.027496338,-0.005859375,0.022491455,-0.003435135,-0.0021972656,-0.029953003,-0.015716553,-0.011123657,-0.054534912,0.015823364,-0.002210617,0.00605011,-0.017700195,-0.00052165985,-0.03918457,-0.009780884,-0.018478394,-0.007965088,0.0024547577,0.018676758,0.0039520264,-0.0019550323,0.006515503,-0.0014877319,-0.0068511963,-0.018432617,0.002729416,0.010124207,-0.007507324,0.020904541,0.046936035,0.0029640198,-0.022949219,0.00121212,-0.003944397,0.0121536255,-0.0234375,0.007030487,-0.0021915436,0.015609741,-0.012176514,-0.010406494,-0.038726807,0.008575439,0.06512451,-0.0018043518,0.0025405884,-0.024719238,-0.0032081604,0.025131226,0.029541016,-0.03781128,0.012901306,-0.040618896,0.024093628,-0.023468018,0.02558899,0.0052108765,0.027450562,-0.019134521,-0.041015625,0.00070619583,0.025238037,-0.00541687,-0.06738281,-0.014007568,-0.077941895,-0.004585266,-0.017471313,-0.016433716,0.008682251,-0.0027389526,-0.027999878,-0.070495605,0.0043754578,0.049591064,0.016906738,0.015602112,-0.0012397766,0.008506775,0.018539429,-0.013389587,-0.019088745,0.020645142,-0.018371582,-0.0126571655,-0.018707275,0.032165527,-0.014717102,-0.028335571,0.007911682,0.0018758774,0.019638062,-0.01171875,0.015327454,-0.010910034,0.0037250519,-0.010696411,-0.008636475,-0.006286621,-0.020858765,0.034179688,-0.049987793,0.030792236,0.0069770813,0.013259888,0.0071525574,0.014862061,0.026168823,-0.036743164,-0.005771637,-0.0013504028,0.010063171,0.03201294,-0.018753052,0.049743652,0.01461792,0.0019931793,0.009536743,-0.0211792,0.005973816,-0.040802002,-0.021743774,0.022323608,0.002796173,0.00054073334,-0.021194458,-0.010856628,0.024459839,-0.0028648376,0.0014371872,-0.011100769,0.0007529259,-0.023101807,0.01965332,-0.01007843,0.030288696,0.001127243,0.023849487,0.032104492,0.043151855,0.0069465637,-0.005744934,0.0024528503,0.02355957,-0.0181427,-0.003850937,0.01864624,0.035491943,0.014129639,0.01737976,0.015777588,-0.028900146,-0.031311035,-0.011177063,-0.021942139,0.011398315,-0.02268982,0.015914917,0.005001068,0.01159668,-0.01689148,-0.026489258,-0.0054092407,-0.021850586,-0.017150879,-0.011764526,0.0029850006,0.013580322,0.01586914,-0.00712204,0.00223732,-0.004550934,0.0309906,-0.005378723,-0.010398865,0.0070877075,0.048553467,0.0059280396,-0.028274536,0.0062065125,-0.012565613,-0.005630493,0.00598526,-0.0046463013,0.023010254,0.027664185,-0.015472412,0.024536133,-0.0011377335,0.047668457,-0.011528015,0.004211426,0.008300781,0.019470215,0.011787415,0.038970947,-0.046691895,0.013031006,0.017608643,-0.019973755,0.00289917,-0.018463135,-0.015586853,0.004425049,0.008636475,-0.006000519,0.034820557,0.015609741,0.015930176,-0.032440186,-0.018798828,0.006706238,-0.03869629,-0.028671265,0.0012102127,-0.012527466,-0.0061149597,0.012489319,-0.024597168,0.0023174286,-0.021514893,0.018753052,0.0030059814,0.017303467,-0.0143966675,-0.024841309,-0.0035476685,-0.019683838,-0.02432251,0.0014953613,-0.010360718,0.053497314,0.019683838,0.025985718,0.019866943,0.026748657,0.0056419373,-0.045898438,-0.020904541,0.0053901672,-0.0045661926,0.007133484,-0.03857422,0.041625977,0.061462402,0.0004284382,0.030532837,0.049072266,0.038085938,-0.0033988953,0.0027484894,0.001291275,0.019058228,-0.014060974,0.026733398,-0.008720398,0.020736694,-0.01890564,0.02482605,-0.003583908,0.03213501,-0.025344849,0.025177002,0.064819336,0.020050049,-0.0051841736,0.024871826,-0.017852783,-0.017456055,-0.009109497,-0.023880005,0.051849365,-0.003479004,0.029754639,0.039398193,0.007865906,-0.020568848,0.026824951,-0.004486084,-0.022842407,0.056030273,0.0076904297,-0.016921997,-0.0010490417,-0.004055023,0.023269653,-0.0463562,-0.015914917,0.032165527,-0.021072388,0.00422287,-0.012268066,0.0043144226,-0.0034675598,0.005306244,-0.0037631989,0.02748108,-0.023406982,0.0014886856,0.011566162,0.009307861,0.019714355,0.009788513,0.029129028,-0.023605347,-0.026245117,0.003168106,0.017700195,0.015419006,-0.018829346,0.03842163,0.0259552,0.045562744,0.02659607,-0.017364502,0.0021915436,0.03265381,0.011383057,-0.010391235,0.054595947,0.01574707,0.027786255,0.042388916,0.038757324,0.032165527,-0.02116394,0.028335571,0.007320404,-0.0002682209,-0.016220093,-0.0062065125,0.01600647,-0.0104522705,0.027862549,-0.005466461,0.0044937134,0.020523071,0.033996582,-0.021911621,-0.004890442,0.00217247,0.007003784,-0.008422852,-0.009269714,0.010498047,-0.019073486,0.00459671,0.017349243,0.018112183,-0.039123535,0.012306213,-0.0042419434,-0.020690918,-0.010887146,0.016601562,-0.049743652,0.011413574,0.0052757263,-0.010475159,-0.03189087,0.01977539,-0.0013856888,0.00022780895,0.031280518,0.016937256,0.0058288574,0.006072998,0.018371582,0.023910522,0.006767273,0.005355835,0.00082731247,0.0069389343,0.027496338,-0.014060974,-0.010734558,-0.0340271,-0.00036358833,0.025512695,-0.014381409,-0.022628784,0.00592041,-0.017120361,-0.018539429,0.005882263,0.037231445,0.009674072,0.041625977,-0.019989014,-0.006916046,0.0007801056,0.032073975,0.0063209534,-0.01727295,-0.0143966675,0.011054993,-0.023590088,0.048553467,0.042388916,-0.0033016205,0.015029907,0.004196167,-0.013282776,-0.0053138733,-0.013427734,0.017974854,-0.024993896,0.019683838,0.0098724365,0.0231781,-0.03643799,-0.021942139,-0.0018339157,-0.034729004,-0.024215698,-0.020812988,0.004776001,0.0035190582,0.02633667,0.012390137,0.039489746,-0.0055160522,0.060333252,-0.013008118,0.06665039,0.00995636,-0.011833191,0.047546387,0.024414062,0.016815186,0.015052795,0.020370483,-0.02909851,0.0054855347,0.018966675,0.009513855,0.0063705444,0.0041503906,-0.010665894,0.041656494,-0.02949524,0.024215698,-0.0038909912,-0.0049057007,0.01852417,-0.021972656,-0.03353882,-0.005268097,-0.0016307831,-0.00014424324,0.03793335,-0.009513855,-0.018035889,-0.019012451,-0.02130127,0.01876831,-0.01953125,0.006198883,-0.0062675476,-0.0034694672,0.015419006,-0.020614624,-0.01474762,-0.0010061264,0.023468018,-0.040130615,-0.0082092285,0.007598877,0.019577026,-0.022064209,0.034454346,0.035858154,-0.0034866333,-0.016174316,0.04837036,-0.008041382,0.02230835,-0.001964569,0.05239868,0.03427124,0.0104904175,-0.0057907104,0.015960693,0.023651123,-0.010749817,0.015213013,0.051452637,0.0028648376,0.017745972,-0.0021533966,-0.012535095,0.00491333,-0.010047913,-0.01626587,-0.004634857,-0.020812988,-0.015312195,-0.0025234222,0.0030994415,-0.008049011,0.011398315,-0.013916016,-0.015098572,0.0027637482,0.03527832,0.008323669,-0.048828125,0.000834465,0.013320923,0.012458801,-0.01828003,-0.02609253,-0.0010995865,-0.043060303,0.007522583,0.024765015,0.0023956299,-0.0016593933,-0.025543213,0.004928589,0.0473938,0.010284424,0.010154724,0.016952515,-0.013763428,0.017410278,-0.012771606,-0.0012750626,0.0025863647,-0.01739502,-0.0026760101,0.025558472,0.00074768066,-0.018112183,0.01612854,0.013542175,0.019378662,0.0046806335,0.013038635,0.026428223,-0.015350342,0.002450943,0.0051078796,0.016677856,-0.03201294,-0.041137695,-0.012245178,0.030441284,0.05810547,-0.016174316,-0.008148193,-0.016937256,0.028335571,0.02949524,0.042755127,0.00053691864,0.049591064,0.01586914,0.0005159378,-0.021331787,0.013076782,-0.00038576126,-0.017471313,0.023330688,-0.025253296,-0.0026226044,-0.0067329407,0.019302368,0.010253906,-0.022018433,-0.01285553,-0.015533447,-0.009819031,0.024032593,-0.025848389,0.01965332,-0.0362854,-0.010246277,0.023101807,0.00084638596,-0.024536133,-0.037902832,-0.02520752,-0.013534546,-0.06976318,0.009788513,-0.017715454,-0.009567261,-0.026016235,0.010787964,-0.013969421,0.03062439,0.0058898926,-0.005264282,0.004547119,0.018325806,0.022109985,-0.009529114,0.028671265,-0.032287598,-0.016067505,0.0023498535,-0.007282257,-0.0029773712,0.035858154,-0.028274536,0.03643799,0.0054626465,-0.013053894,0.004005432,-0.010314941,-0.013534546,0.0048713684,-0.038269043,-0.017547607,0.0231781,0.018737793,-0.009529114,0.00076913834,0.036895752,-0.026062012,-0.019744873,0.03024292,0.047943115,0.0013418198,0.055786133,-0.029266357,0.0053482056,-0.03488159,-0.006149292,-0.008300781,0.014640808,0.0028896332,0.015640259,0.005344391,0.028198242,0.013320923,-0.013313293,-0.012626648,0.04321289,0.021316528,-0.0033855438,0.037750244,0.011192322,0.005428314,-0.02432251,-0.0034999847,0.004486084,0.042236328,0.007801056,0.017913818,-0.01725769,0.011619568,-0.011474609,0.011047363,0.035827637,-0.03378296,-0.039123535,-0.007774353,-0.020889282,0.012687683,-0.008132935,0.007896423,-0.015197754,0.022949219,-0.034088135,-0.031204224,-0.028640747,0.018951416,0.009765625,-0.006965637,-0.007850647,-0.0040397644,-0.0033893585,-0.027938843,-0.0018138885,-0.0592041,-0.03250122,-0.0014362335,-0.017303467,0.014045715,0.0010538101,-0.015350342,0.0075416565,-0.0010414124,0.0029335022,0.005584717,0.017074585,0.0017786026,0.004600525,0.024520874,0.022979736,-0.005859375,0.00093603134,-0.009666443,0.0035438538,0.03353882,-0.007171631,0.0059013367,-0.01121521,0.017578125,0.011741638,0.0043792725,0.032073975,-0.016342163,0.027755737,-0.04031372,-0.0134887695,-0.002248764,-0.024169922,0.031097412,-0.014152527,-0.029678345,-0.011550903,-0.005584717,-0.022476196,0.0047416687,0.009399414,0.043121338,-0.0019111633,0.05407715,-0.02078247,-0.022659302,0.011940002,0.01322937,-0.008369446,0.0021266937,0.021911621,0.009170532,0.02708435,0.003955841,0.0026874542,-0.023345947,-0.0082473755,0.0011510849,-0.008399963,-0.0036735535,0.003709793,0.016357422,0.02909851,0.008560181,0.0067253113,0.027572632,0.011062622,0.028167725,0.009384155,0.04876709,0.027633667,-0.027862549,0.009399414,0.013969421,-0.01600647,0.0041046143,-0.006385803,0.006214142,-0.029724121,-0.0023097992,-0.0107803345,0.03967285,-0.011421204,0.013427734,-0.007160187,-0.0062828064,-0.060028076,-0.0049095154,-0.04650879,0.0030651093,0.015419006,0.003774643,0.016433716,0.008979797,-0.022491455,0.0065193176,0.020980835,-0.005771637,-0.033203125,-0.020736694,0.0006866455,0.0056915283,0.010879517,0.01222229,-0.036071777,-0.025253296,0.0021915436,-0.0024986267,-0.0037193298,-0.025161743,0.02897644,0.029174805,-0.011886597,-0.023773193,0.023330688,0.012969971,-0.0021133423,0.009361267,0.0044174194,0.03466797,0.0395813,-0.0009741783,0.0211792,0.008506775,-0.037231445,0.05593872,-0.010940552,0.03152466,-0.022628784,-0.017181396,-0.021713257,-0.008255005,-0.0063705444,-0.0023536682],"createdAt":"2026-04-18T18:40:41.322Z","updatedAt":"2026-04-27T22:32:47.475Z","lastSeenAt":"2026-04-27T22:32:47.475Z","tsv":"'/api/v1/accounts/111/balance':46 '0.02':78,133 '000':69 '20':68 '402':217 '6':74 'Base network API' 'USDC pay-per-call' 'access':156 'account':4,18,35,195 'account balance API' 'account-balance' 'actual':198,230 'advertis':85,147 'ai':102 'amount':63 'analysi':106 'analyt':96 'api':93,149,164 'assess':228 'balanc':5,19,36,196 'base':8,22,59,70,140 'base-network' 'behind':49 'beyond':205 'broader':82 'call':12,26,66,92 'challeng':52,218 'classif':109 'confirm':212 'connect':173 'content':179 'convers':126 'crypto payment API' 'data':95,99,233 'decim':75 'descript':191 'detail':190 'difficult':226 'doc':163 'document':158,223 'embed':110 'endpoint':6,20,30,129,197,210 'equal':77 'essenti':160 'estim':120 'exampl':187 'exchang':115 'expect':204 'export':100 'feed':114 'financ':111 'gas':119 'gate':3,17,48 'generat':127 'geocod':124 'howev':157 'infrastructur':122 'input':202 'insight':101 'instant':155 'key':150 'lack':221 'learn':104 'limit':153 'list':131 'live':213 'lookup':37 'lowpaymentfee' 'lowpaymentfee.com':32,83 'machin':103 'make':224 'maximum':62 'metric':97 'micropayment API' 'network':60 'no-api-key' 'nonexist':161 'openapi':183 'page':168 'pay':10,24,90 'pay-per-cal':9,23,89 'pay-per-call' 'payment':41,54 'per':11,25,65,79,91,134 'platform':84,146 'post':207 'price':113,165 'prompt':175 'proper':216 'protocol':42,144 'provid':33 'qualiti':234 'quot':118 'rate':116,152 'readm':167 'render':170 'report':98 'request':80,135,208 'request/response':186 'requir':53,64 'resourc':45 'respons':237 'return':199,214 'schema':184 'sentiment':105 'settl':136 'span':94 'specif':44 'suit':87 'summar':108 'text':107 'token':117 'unit':71 'usdc':14,28,56,73,138 'usdc-settlement' 'util':123,231 'valid':125 'via':38,141 'wallet':174 'web3':112 'x402':2,16,40,51,143 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"14acbc85-4d7a-455e-b827-423e0c188f6e","listingId":"99cbd982-7460-44c1-b5de-6aa0a6eda338","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/111/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":"2026-04-18T18:40:41.322Z"}],"sources":[{"listingId":"99cbd982-7460-44c1-b5de-6aa0a6eda338","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/111/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:41.322Z","lastSeenAt":"2026-04-27T22:32:47.475Z"}],"details":{"listingId":"99cbd982-7460-44c1-b5de-6aa0a6eda338","quickStartSnippet":"# The endpoint requires an x402 X-PAYMENT header with USDC on Base.\n# Using curl to see the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/accounts/111/balance\n# Returns 402 with x402 payment challenge.\n# Use an x402-compatible client to attach payment automatically.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/accounts/111/balance"},{"claim":"All endpoints listed at $0.02 per request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/111/balance"}],"useCases":["Querying account balance information via a pay-per-call model without API key registration","Integrating x402-compatible agents with low-cost financial data endpoints","Testing x402 protocol payment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocol integrations","Agents that need keyless, pay-per-call API access on Base","Low-cost per-request financial data lookups"],"notFor":["Production use cases requiring documented request/response schemas","High-volume analytics where per-call pricing adds up quickly","Users who need detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.401Z"},"updatedAt":"2026-04-27T22:32:47.475Z"}}