{"id":"a0e40548-3988-492f-8d41-86c63fa549c7","shortId":"QzDbAy","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/14/balance`. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 payment protocol on the Base network.\n\nThe specific endpoint probed returns an x402 challenge requesting payment in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) with a `maxAmountRequired` of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's advertised flat pricing of $0.02/request across all endpoints. Payment is made via the x402 \"exact\" scheme, and the endpoint accepts POST requests.\n\nThe platform advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual response schema and detailed behavior of this particular balance endpoint remain undocumented. The endpoint is live (402 challenge confirmed), but without example responses or an OpenAPI spec, the exact data returned is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","account-balance","post-method","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available — all doc pages return only 'Connect wallet'","The exact response format and data returned by this endpoint are unknown","The path '/api/v1/accounts/14/balance' includes a hardcoded account ID (14); unclear if this is parameterizable","Platform lists many endpoints but none have documented schemas or example responses"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/14/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/14/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no example responses, and the purpose of this specific 'accounts/14/balance' path is unexplained. Effectively a stub listing.","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":"2026-04-19T00:18:36.469Z","embedding":[-0.0035247803,-0.008308411,0.06173706,0.020568848,-0.0009765625,-0.037322998,-0.0006933212,0.02468872,0.06378174,-0.07293701,0.042053223,-0.05697632,-0.030670166,-0.04498291,-0.0045280457,0.02029419,-0.023605347,0.010375977,-0.064208984,0.029754639,0.007217407,-0.02835083,-0.01033783,0.054473877,-0.015113831,-0.04058838,-0.012039185,-0.030380249,-0.026672363,-0.032684326,0.029464722,-0.021530151,-0.009262085,0.019744873,0.00030994415,0.007637024,0.00051116943,0.034423828,0.02784729,-0.01991272,-0.015174866,-0.061309814,-0.0065994263,0.0096588135,-0.037322998,-0.003540039,0.008842468,-0.020233154,0.0023784637,0.0066490173,-0.04269409,0.016403198,0.013786316,0.007041931,0.012306213,0.023986816,-0.0031700134,-0.012306213,0.01852417,0.012290955,-0.0037555695,-0.060699463,-0.02180481,-0.0074501038,0.018035889,0.048553467,0.00007456541,0.05517578,0.00019073486,0.05935669,0.019927979,0.068481445,0.03564453,0.0073127747,-0.0051612854,-0.026062012,0.0063972473,0.029464722,-0.023483276,-0.04272461,-0.011978149,-0.03933716,-0.07800293,-0.00856781,0.001326561,-0.042541504,-0.015525818,0.00920105,-0.03616333,0.05307007,-0.07293701,-0.019241333,0.015571594,0.021331787,0.009559631,-0.03704834,-0.016326904,0.018722534,-0.00409317,0.011375427,0.016708374,-0.015014648,0.03201294,-0.016281128,0.055145264,0.046936035,0.019042969,0.011512756,-0.0064964294,-0.0050354004,-0.0037975311,0.0039634705,0.0113220215,-0.032348633,0.0149002075,0.012641907,-0.024246216,0.026046753,-0.016036987,0.018707275,-0.027175903,0.06542969,0.010726929,-0.0158844,0.020263672,-0.050323486,-0.009292603,0.021026611,-0.04257202,0.0039100647,0.013809204,0.007041931,0.017303467,-0.020812988,-0.028015137,0.014595032,-0.02470398,-0.014007568,-0.027816772,-0.019958496,0.028213501,-0.013122559,0.03729248,0.023529053,-0.10296631,-0.010543823,-0.036071777,0.031341553,-0.03427124,-0.0022697449,-0.0027656555,0.018814087,-0.0010108948,-0.014862061,-0.011734009,-0.026443481,-0.0066871643,0.027893066,0.006866455,0.054626465,0.011070251,0.023895264,0.03439331,0.005256653,0.031219482,0.044158936,-0.012458801,-0.062927246,-0.076538086,-0.023422241,0.006000519,-0.02279663,-0.030700684,-0.004508972,-0.017196655,-0.07513428,-0.012016296,0.009635925,-0.02897644,-0.028915405,-0.000682354,-0.044433594,0.005886078,-0.02268982,-0.049682617,-0.013198853,-0.008796692,0.06262207,0.025985718,0.011306763,0.030471802,-0.003232956,0.04473877,0.025772095,-0.028396606,-0.03050232,0.022216797,-0.0063705444,0.01687622,-0.0062026978,0.020812988,-0.015960693,0.030441284,0.054351807,-0.00579834,-0.023651123,0.0050354004,-0.04360962,-0.052642822,-0.024642944,0.0121536255,0.0074043274,-0.004753113,0.005065918,-0.038604736,-0.015235901,-0.0021762848,0.021011353,-0.0028152466,0.061584473,0.0067367554,0.0036773682,0.013908386,0.017318726,-0.050842285,0.026687622,0.04309082,0.028442383,-0.015075684,-0.028671265,0.016479492,-0.0007324219,-0.02218628,0.0035533905,-0.009605408,0.037322998,0.0037899017,0.014984131,0.02696228,-0.009246826,-0.017700195,-0.021148682,0.005126953,0.020767212,0.012893677,-0.013900757,-0.036071777,-0.07800293,0.04095459,0.078552246,0.0068740845,-0.011146545,0.009925842,-0.025939941,-0.044128418,-0.06793213,0.050720215,0.07116699,-0.0064468384,-0.04046631,0.02357483,-0.0146484375,-0.036621094,-0.025634766,-0.015365601,-0.014335632,-0.016494751,0.00013053417,-0.059143066,0.014434814,0.011184692,0.028427124,0.038635254,-0.007461548,-0.05407715,-0.037322998,0.004611969,0.019851685,-0.025024414,-0.00944519,-0.010131836,0.032287598,0.032318115,0.005004883,0.010505676,-0.012580872,-0.01890564,-0.003490448,0.02696228,-0.0068244934,-0.020629883,0.019561768,0.0062026978,-0.058654785,0.021652222,0.005016327,0.03488159,-0.037078857,0.035308838,-0.0044021606,-0.012756348,0.060394287,-0.0066986084,-0.054138184,0.013786316,-0.0061302185,0.04977417,0.05758667,0.0064964294,-0.004211426,-0.011703491,0.072387695,-0.012779236,0.0007491112,0.023117065,0.026794434,0.027389526,0.005886078,-0.07910156,-0.03942871,0.008224487,-0.0063972473,0.02809143,-0.026519775,0.022750854,0.0074539185,0.029327393,-0.025894165,-0.006866455,-0.037628174,-0.009063721,-0.007511139,0.0009822845,-0.020019531,0.005722046,0.022201538,0.016082764,-0.0012187958,-0.005680084,0.05407715,0.026138306,-0.013206482,-0.0105896,-0.040527344,-0.01725769,-0.020721436,0.02859497,0.005847931,0.018615723,0.029174805,-0.035491943,-0.0007214546,0.021652222,0.004600525,0.05593872,-0.0076179504,-0.0018386841,-0.06341553,-0.05368042,-0.025161743,-0.03286743,0.015823364,0.017425537,-0.0016326904,0.051635742,-0.00051546097,-0.027236938,-0.02809143,0.040039062,-0.03857422,0.00881958,0.035369873,-0.026794434,-0.017807007,0.0070610046,0.0065612793,0.018066406,0.031204224,0.017028809,0.010276794,0.08746338,0.053131104,0.002161026,0.016143799,0.03161621,0.024932861,-0.010345459,-0.0045318604,-0.014060974,-0.025772095,0.030349731,-0.01576233,-0.021270752,-0.07879639,0.055603027,0.025283813,0.08508301,0.022872925,0.0038414001,0.032196045,-0.004009247,0.01386261,-0.042633057,-0.044555664,-0.032562256,-0.04751587,0.021331787,-0.011367798,0.019226074,-0.03451538,0.042053223,0.024246216,0.025863647,-0.055725098,0.04937744,-0.0032806396,-0.025009155,0.01977539,0.0149383545,0.052490234,0.034698486,-0.02848816,0.008872986,0.009140015,-0.03326416,-0.015411377,0.029144287,0.006717682,-0.0146484375,-0.05883789,-0.018875122,0.024917603,-0.011886597,-0.06689453,-0.008239746,0.011772156,0.023757935,0.02848816,-0.021102905,-0.025985718,-0.0011281967,-0.016067505,-0.06854248,-0.004825592,-0.01826477,0.027069092,0.03692627,-0.042938232,0.0149383545,0.012435913,0.010093689,-0.013206482,0.013656616,-0.008605957,0.0018434525,-0.02229309,0.041778564,0.010932922,0.02229309,0.019561768,0.044281006,0.027191162,0.021713257,0.030822754,0.004688263,-0.0039024353,-0.054595947,0.024353027,-0.0680542,0.01965332,0.023544312,-0.027236938,0.0031337738,-0.007549286,-0.03527832,-0.021606445,0.009254456,-0.02571106,0.017440796,0.021453857,-0.024429321,-0.02494812,-0.03353882,-0.0065345764,0.0037345886,0.05029297,0.019226074,0.001540184,-0.037994385,-0.010414124,0.01777649,0.001461029,0.0040359497,-0.013031006,-0.012329102,-0.029541016,-0.00484848,-0.0206604,-0.010681152,0.031585693,-0.0028381348,-0.012054443,0.013771057,-0.01007843,0.005630493,-0.02204895,0.0046653748,0.03845215,-0.02168274,0.013587952,-0.010093689,0.025497437,-0.006362915,-0.03250122,-0.06402588,0.032440186,-0.0035209656,0.03314209,-0.035369873,0.013122559,0.01121521,0.019760132,-0.001376152,-0.012069702,0.0010356903,-0.004508972,-0.024032593,-0.08892822,0.048553467,-0.014320374,0.028442383,0.00040388107,-0.0027332306,0.029266357,-0.001203537,0.007736206,0.026123047,-0.01977539,-0.0084991455,-0.04058838,-0.031219482,-0.02368164,0.000019609928,-0.014274597,0.019927979,-0.0015897751,0.029891968,-0.002796173,-0.020263672,0.013648987,0.00022304058,0.0010623932,0.011070251,0.001288414,0.011688232,0.04248047,0.013221741,-0.04522705,0.03439331,0.0027599335,-0.008171082,-0.020355225,0.04800415,0.016342163,-0.0026111603,0.0016698837,-0.01348114,-0.005519867,-0.01966858,0.0027427673,0.0035800934,0.044311523,0.019515991,-0.03970337,0.011192322,0.0013799667,-0.0289917,-0.004585266,0.026885986,0.028045654,-0.046722412,0.011138916,0.025817871,0.044403076,-0.03765869,0.0008983612,0.007156372,0.036346436,0.018600464,0.00868988,-0.004299164,0.018966675,-0.017807007,0.031021118,0.008773804,-0.018600464,-0.022567749,-0.00819397,0.02305603,0.019683838,0.007850647,-0.0058517456,-0.012817383,-0.016815186,0.0058631897,-0.01965332,0.011871338,0.01499939,0.009628296,-0.009849548,0.0067367554,0.026016235,-0.040374756,-0.0039863586,-0.003458023,0.038970947,-0.0013370514,-0.0057792664,0.025863647,0.009490967,0.034118652,-0.04220581,-0.022537231,-0.0043296814,0.00466156,-0.027023315,-0.06008911,-0.016189575,0.0059013367,0.021759033,-0.010391235,0.0042495728,0.025054932,-0.0052223206,0.0017900467,0.008911133,0.017944336,-0.01826477,-0.0014724731,-0.056549072,0.003686905,-0.007637024,-0.014022827,-0.021438599,0.0066490173,-0.031341553,-0.025634766,0.0009217262,-0.018600464,-0.0020389557,-0.004611969,-0.007663727,0.03225708,-0.02633667,0.0040130615,-0.016082764,-0.027664185,-0.011367798,0.001449585,0.02204895,-0.053497314,0.015991211,-0.013656616,-0.0010929108,-0.0038471222,-0.0023765564,0.022216797,0.00058984756,0.020462036,0.020599365,-0.044281006,0.034118652,-0.021942139,0.0035591125,-0.00014579296,-0.018692017,-0.001493454,-0.019638062,-0.015220642,0.033691406,-0.007904053,-0.011199951,-0.024551392,-0.02999878,-0.018447876,-0.04537964,0.02746582,0.02218628,0.044708252,-0.021881104,0.0009083748,0.013633728,0.014511108,-0.004589081,-0.012199402,-0.0041046143,0.021514893,0.017593384,0.0019359589,-0.030349731,-0.034484863,-0.019577026,-0.0038852692,-0.05368042,-0.05532837,-0.016647339,0.016937256,0.009132385,-0.016906738,-0.019989014,-0.01550293,-0.006504059,-0.03793335,0.008682251,-0.015350342,0.016540527,-0.0053138733,-0.013458252,0.009338379,0.011512756,-0.031097412,0.02571106,0.013069153,-0.0011482239,-0.018173218,-0.0037441254,0.034179688,0.011054993,-0.008232117,-0.023345947,-0.01222229,-0.019180298,-0.06359863,0.01852417,0.00045609474,0.011199951,-0.011528015,-0.0072364807,-0.04095459,-0.00793457,-0.019989014,-0.007949829,-0.0013751984,0.014770508,0.0099105835,0.023010254,-0.002796173,-0.009635925,-0.026885986,-0.016952515,0.00674057,0.009223938,-0.00894928,0.01625061,0.05029297,0.01121521,-0.015220642,-0.00048041344,0.0017871857,0.028701782,-0.030975342,-0.006511688,0.002872467,0.023788452,-0.018661499,-0.020706177,-0.030441284,0.004611969,0.061462402,-0.004436493,-0.016159058,-0.013694763,-0.0008034706,0.025741577,0.03982544,-0.04107666,0.016937256,-0.037109375,0.017959595,-0.030944824,0.030578613,0.007896423,0.03579712,-0.022659302,-0.04638672,-0.0022506714,0.032287598,-0.013534546,-0.055999756,-0.01184082,-0.06488037,-0.007080078,-0.02835083,-0.005630493,0.010826111,-0.005290985,-0.025177002,-0.07745361,0.0131073,0.052093506,0.008804321,0.010787964,-0.0126571655,0.01309967,0.01272583,-0.026824951,-0.03149414,0.020401001,-0.021057129,-0.004798889,-0.024765015,0.020645142,-0.01361084,-0.023605347,0.020385742,0.001748085,0.003944397,-0.018173218,0.0019664764,-0.021743774,0.0029335022,-0.0011844635,0.006591797,-0.005443573,-0.020370483,0.028839111,-0.048736572,0.024795532,0.0041160583,0.016098022,0.019180298,0.028366089,0.016098022,-0.037078857,-0.0074005127,0.0016498566,0.005168915,0.027450562,-0.025009155,0.043945312,0.0070533752,0.0008058548,0.015525818,-0.03225708,0.0018358231,-0.043792725,-0.028244019,0.026535034,0.0034313202,-0.00039196014,-0.01386261,0.0073547363,0.0064964294,-0.002954483,-0.00415802,-0.009681702,-0.010406494,-0.014221191,0.01940918,0.0022697449,0.024307251,-0.0057296753,0.020614624,0.038116455,0.039520264,0.00907135,-0.00073719025,-0.01197052,0.019073486,-0.021865845,-0.008773804,0.016311646,0.028167725,0.00793457,0.016220093,0.020874023,-0.04034424,-0.025360107,0.0020656586,-0.022094727,0.019424438,-0.021026611,0.007381439,-0.00484848,0.013244629,-0.010147095,-0.029525757,0.00024056435,-0.031799316,-0.021713257,0.0020446777,0.006378174,0.0036716461,0.010368347,-0.0010509491,0.000094890594,-0.0017185211,0.03189087,-0.0077552795,-0.013549805,0.022262573,0.054138184,-0.0035533905,-0.023773193,0.008308411,-0.0015058517,-0.013069153,-0.0013189316,-0.0049858093,0.015151978,0.025909424,-0.01285553,0.035491943,-0.011314392,0.05026245,-0.011764526,0.01537323,-0.00022363663,0.0060806274,-0.0024986267,0.04272461,-0.041778564,0.0075302124,0.0102005005,-0.02355957,-0.01625061,-0.0105896,-0.013755798,0.011734009,0.010040283,-0.0064048767,0.013793945,0.022949219,0.022369385,-0.027694702,-0.006931305,-0.0019216537,-0.045684814,-0.029022217,0.016906738,-0.015335083,-0.007827759,0.018722534,-0.017959595,0.0077056885,-0.028076172,0.030929565,0.008979797,0.013198853,-0.014625549,-0.019119263,-0.010147095,-0.01902771,-0.027267456,0.012748718,0.0017185211,0.048858643,0.03164673,0.013206482,0.029449463,0.020568848,-0.000095784664,-0.04849243,-0.01902771,0.01537323,-0.015731812,0.018173218,-0.015388489,0.042053223,0.051574707,-0.0026111603,0.027893066,0.057739258,0.037963867,-0.017196655,0.023757935,-0.011100769,0.006465912,-0.016281128,0.03717041,-0.012466431,0.034118652,-0.023529053,0.02281189,0.00046801567,0.023956299,-0.03302002,0.021652222,0.06896973,0.021209717,-0.014160156,0.04135132,-0.009361267,-0.011665344,-0.0060768127,-0.02192688,0.045196533,0.009681702,0.031143188,0.02960205,0.013069153,-0.020874023,0.02848816,-0.011001587,-0.034729004,0.051330566,0.013183594,-0.018478394,-0.016586304,-0.0043907166,0.020767212,-0.064208984,-0.020065308,0.027496338,-0.019683838,-0.004135132,-0.0064735413,0.009506226,-0.002084732,0.015426636,0.0077171326,0.027816772,-0.017822266,0.0037555695,0.0236969,0.0015439987,0.018539429,0.030853271,0.025939941,-0.028015137,-0.0236969,0.009414673,0.030853271,0.0027103424,-0.012573242,0.030700684,0.014862061,0.05014038,0.022613525,-0.023162842,0.014022827,0.04434204,0.011810303,-0.012458801,0.048980713,0.025848389,0.020751953,0.04220581,0.027267456,0.020812988,-0.027923584,0.01474762,-0.0015821457,0.00039863586,-0.018066406,-0.001408577,0.01499939,-0.0010414124,0.029846191,-0.01121521,-0.0014390945,0.014511108,0.033966064,-0.01739502,-0.015808105,-0.0016946793,0.0037460327,-0.002735138,-0.012413025,0.010810852,-0.023406982,0.010131836,0.024719238,0.02508545,-0.037750244,0.014221191,0.004787445,-0.02104187,-0.018173218,0.031585693,-0.058258057,0.006324768,0.0018262863,-0.010696411,-0.03286743,0.018600464,0.017333984,-0.005657196,0.03656006,0.007835388,0.010093689,0.004436493,0.027069092,0.024307251,-0.0054969788,0.004333496,-0.0060539246,-0.00019347668,0.03567505,-0.005935669,-0.00459671,-0.023651123,-0.0009188652,0.029922485,-0.016036987,-0.013687134,0.0053367615,-0.0124435425,-0.03842163,0.009361267,0.048095703,0.018615723,0.033966064,-0.010795593,-0.009246826,0.003921509,0.045959473,0.0008921623,-0.023757935,-0.030197144,0.009780884,-0.018371582,0.047729492,0.05218506,-0.012069702,0.026168823,-0.00409317,-0.027297974,-0.012161255,-0.018249512,0.026138306,-0.019378662,0.008117676,0.0024223328,0.02444458,-0.023147583,-0.014663696,-0.0015630722,-0.033447266,-0.02319336,-0.021377563,-0.0016527176,0.0071868896,0.0423584,0.019348145,0.024093628,-0.01234436,0.06124878,-0.0035648346,0.05609131,0.0018558502,0.0022659302,0.0395813,0.025482178,0.025115967,0.022094727,0.026947021,-0.028320312,0.007698059,0.009346008,0.01234436,0.010848999,0.00009286404,-0.004875183,0.035125732,-0.013549805,0.033294678,-0.000808239,-0.010551453,0.0066719055,-0.017303467,-0.01689148,0.003118515,-0.0019741058,0.0021762848,0.043304443,-0.017562866,-0.011558533,-0.010536194,-0.015655518,0.03137207,-0.009017944,0.0022220612,0.006164551,-0.01335907,0.022064209,-0.009857178,-0.025527954,0.0067214966,0.024734497,-0.038116455,-0.015586853,0.005897522,0.017684937,-0.027618408,0.034698486,0.037994385,-0.00592041,-0.014183044,0.050842285,-0.009437561,0.028274536,-0.0067977905,0.053649902,0.037872314,0.0013999939,0.00081539154,0.023376465,0.03491211,-0.0128479,0.0121536255,0.03894043,0.00041365623,0.008857727,-0.011550903,-0.012924194,0.010658264,-0.013397217,-0.026046753,0.0007095337,-0.026260376,-0.014137268,-0.003818512,0.015060425,-0.00944519,0.009223938,-0.010185242,-0.014076233,0.0087890625,0.028900146,0.011810303,-0.049987793,-0.0050354004,0.009384155,0.014450073,-0.03100586,-0.02003479,0.013824463,-0.042175293,0.0027198792,0.028900146,0.0046806335,-0.0006875992,-0.01234436,-0.011352539,0.04623413,0.009986877,0.01210022,0.024795532,-0.005973816,0.022384644,-0.009262085,-0.00043463707,-0.00207901,-0.005115509,0.0019340515,0.018951416,-0.017852783,-0.011138916,0.021362305,0.008491516,0.022262573,-0.003818512,0.0037269592,0.03353882,-0.02722168,-0.010444641,0.0007414818,0.027938843,-0.03479004,-0.027694702,-0.0074920654,0.019073486,0.055480957,-0.018585205,-0.016220093,-0.0022773743,0.028396606,0.027175903,0.04324341,0.009605408,0.050231934,0.013442993,-0.008613586,-0.02432251,0.010643005,0.0037841797,-0.026290894,0.02281189,-0.0234375,-0.00078725815,0.0043182373,0.026412964,0.0024642944,-0.024108887,-0.014732361,-0.019241333,-0.008804321,0.009437561,-0.027816772,0.027664185,-0.029342651,-0.0113220215,0.014472961,0.0040397644,-0.022720337,-0.03201294,-0.0034217834,-0.009170532,-0.06616211,0.011001587,-0.0284729,-0.0054092407,-0.013710022,-0.0021133423,-0.020187378,0.02758789,-0.005794525,-0.0074501038,0.00894928,0.015731812,-0.0016155243,-0.003692627,0.030975342,-0.021240234,-0.0317688,-0.007610321,-0.0029335022,-0.018188477,0.032165527,-0.023544312,0.027542114,0.014595032,0.00116539,0.0074501038,-0.006187439,-0.016403198,0.0028858185,-0.044281006,-0.010047913,0.01663208,0.01737976,-0.002325058,-0.003753662,0.053741455,-0.02168274,-0.018203735,0.024978638,0.046020508,0.0004222393,0.0592041,-0.02532959,0.006298065,-0.027496338,0.00041270256,-0.006603241,0.013671875,0.009857178,0.009635925,0.0054092407,0.01979065,0.018569946,-0.021240234,-0.011047363,0.03390503,0.015174866,-0.0065231323,0.040161133,0.008705139,0.009338379,-0.01260376,-0.01663208,-0.0028762817,0.041137695,0.021697998,0.012123108,-0.016647339,0.011947632,-0.01626587,0.0070877075,0.032440186,-0.033111572,-0.035064697,-0.00566864,-0.027862549,0.00995636,0.0034999847,0.006904602,-0.010131836,0.010566711,-0.04360962,-0.032165527,-0.024734497,0.014839172,0.010375977,0.0047683716,-0.0028591156,-0.0045318604,0.000910759,-0.029541016,-0.003227234,-0.045410156,-0.031097412,-0.0049057007,-0.016494751,0.018096924,0.01007843,-0.015159607,0.011459351,-0.0008163452,-0.003019333,0.009689331,0.027618408,-0.014175415,-0.0041618347,0.031463623,0.018432617,-0.014709473,0.0019025803,-0.024658203,-0.0020618439,0.033996582,0.0023097992,0.017120361,-0.010345459,0.020614624,0.0028018951,0.003107071,0.04397583,-0.0077323914,0.020553589,-0.03564453,-0.0064048767,-0.0023555756,-0.017166138,0.025894165,-0.003238678,-0.03439331,-0.018966675,-0.009750366,-0.028213501,0.012084961,0.0066184998,0.04446411,-0.011634827,0.037841797,-0.023666382,-0.027816772,0.018325806,0.0003812313,-0.03010559,0.004196167,0.020965576,0.010734558,0.014160156,-0.002790451,0.0010433197,-0.020050049,-0.0011415482,-0.0015048981,-0.0066871643,-0.016296387,-0.0006508827,0.020477295,0.032165527,0.0011796951,0.009513855,0.02229309,0.00894928,0.026519775,0.009857178,0.037872314,0.013824463,-0.029373169,0.011947632,0.0043678284,-0.030578613,-0.0054893494,-0.008514404,0.01285553,-0.03302002,-0.0011129379,0.0028324127,0.038513184,-0.010810852,0.01222229,-0.016036987,0.0055236816,-0.053833008,-0.0055236816,-0.046844482,0.015174866,0.020996094,0.014846802,0.023468018,0.01309967,-0.03353882,-0.00033259392,0.029342651,-0.0051727295,-0.04333496,-0.012123108,0.008224487,0.015014648,0.015327454,0.016342163,-0.037475586,-0.021728516,-0.004135132,0.009155273,-0.006034851,-0.01637268,0.02458191,0.045166016,-0.020126343,-0.020828247,0.025527954,0.010017395,0.0021800995,0.0077819824,0.0056762695,0.052124023,0.035583496,-0.003314972,0.025970459,0.021514893,-0.03237915,0.06567383,-0.018173218,0.02128601,-0.015083313,-0.012367249,-0.03100586,-0.019042969,-0.006061554,0.0071983337],"createdAt":"2026-04-18T18:39:16.072Z","updatedAt":"2026-04-28T10:33:11.162Z","lastSeenAt":"2026-04-28T10:33:11.162Z","tsv":"'/api':160 '/api/v1/accounts/14/balance':42 '/docs':158 '/pricing':159 '/readme':161 '/request':126 '0.02':113,125 '000':102 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':94 '20':101 '402':192 '6':108 'Base network API' 'USDC micropayment API' 'accept':141 'access':37,155 'account':4,18 'account balance API' 'account-balance' 'across':127 'actual':175 'advertis':121,146 'ai/ml':63 'analyt':62 'api':36,58,148 'balanc':5,19,184 'base':8,22,79,96,103 'base-network' 'behavior':180 'broader':48 'call':12,26,57 'challeng':88,193 'confirm':194 'connect':166 'consist':116 'content':172 'contract':93 'crypto payment API' 'data':61,66,205 'decim':109 'detail':179 'document':156 'dozen':52 'endpoint':6,20,30,59,83,129,140,185,189 'exact':136,204 'exampl':197 'finance/web3':65 'flat':122 'gate':3,17,71 'infer':64 'instant':154 'key':149 'limit':152 'live':191 'lowpaymentfee' 'lowpaymentfee.com':32 'made':132 'maxamountrequir':99 'network':80 'no-api-key' 'offer':51 'openapi':201 'page':157 'paid':9,23 'part':45 'particular':183 'path':41 'pay':55 'pay-per-cal':54 'pay-per-call API' 'payment':75,90,130 'per':11,25,56,114 'per-cal':10,24 'per-call-pricing' 'platform':49,119,145 'post':142 'post-method' 'premium':35 'price':123 'probe':84 'prompt':168 'protocol':76 'provid':33 'rate':151 'remain':186 'request':89,115,143 'resourc':38 'respons':176,198 'return':85,163,206 'schema':177 'scheme':137 'servic':69 'sinc':105 'span':60 'spec':202 'specif':82 'substant':171 'translat':111 'undocu':187 'unit':104 'unknown':208 'usdc':14,28,92,106 'usdc-settlement' 'use':107 'util':68 'via':72,133 'wallet':167 'without':196 'x402':2,16,74,87,135 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"0862c3a4-b962-4188-b43a-fbc9c65b1d5f","listingId":"a0e40548-3988-492f-8d41-86c63fa549c7","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/14/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":"2026-04-18T18:39:16.072Z"}],"sources":[{"listingId":"a0e40548-3988-492f-8d41-86c63fa549c7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/14/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:16.072Z","lastSeenAt":"2026-04-28T10:33:11.162Z"}],"details":{"listingId":"a0e40548-3988-492f-8d41-86c63fa549c7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/14/balance \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/14/balance"},{"claim":"Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/14/balance"}],"useCases":["Querying account balance data behind a micropayment wall","Integrating pay-per-call balance lookups into agent workflows","Demonstrating x402 protocol payment flows on Base"],"bestFor":["Agents or services that need on-demand account balance data without API key management","Developers experimenting with x402 payment-gated APIs","Micropayment-based access to financial data endpoints"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would prefer subscription-based pricing over per-call fees","Anyone needing non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.359Z"},"updatedAt":"2026-04-28T10:33:11.162Z"}}