{"id":"d9bc360f-4dd5-42db-9b45-4994fbf966b9","shortId":"QB8fPD","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 a pay-per-request \"Premium API Access\" resource at the path `/api/v1/accounts/11/balance`. It is part of a broader platform that offers dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all settled on the Base network using USDC.\n\nThe specific endpoint probed returns account balance information via HTTP POST. It uses the x402 payment protocol (version 1, \"exact\" scheme) and requires a maximum of 20,000 base units of USDC (0.02 USD) per request, paid to the address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` is the canonical USDC contract on Base. No API keys or rate limits are advertised; access is gated purely by the x402 payment challenge.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the balance endpoint actually returns. The platform's landing page lists many endpoints at $0.02 each but provides no further technical detail. Treat this as a functional but minimally documented service.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 API","USDC pay-per-call","Base network API","crypto payment API","lowpaymentfee"],"warnings":["No documentation available — all doc/pricing/API pages render only 'Connect wallet'","No OpenAPI or JSON schema describing request parameters or response format","The specific endpoint /api/v1/accounts/11/balance is not listed among the platform's advertised APIs","Purpose and response structure of 'account balance' endpoint is unknown — could be a demo or placeholder"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/11/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/11/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 essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what the balance endpoint returns. The specific endpoint path (/accounts/11/balance) is not listed on the landing page, adding uncertainty about its purpose.","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":"2026-04-19T00:15:51.373Z","embedding":[-0.0023822784,0.008506775,0.04901123,0.018234253,0.018295288,-0.040985107,-0.010276794,0.025436401,0.07537842,-0.06439209,0.021514893,-0.064819336,-0.040527344,-0.047729492,-0.0023860931,0.019104004,-0.024261475,0.029647827,-0.06048584,0.037597656,0.005870819,-0.02760315,-0.0043792725,0.053955078,-0.01612854,-0.040802002,-0.0070533752,-0.03604126,-0.0340271,-0.038848877,0.035949707,-0.022216797,0.0019817352,0.014709473,0.011741638,0.011581421,0.0040893555,0.035095215,0.040496826,-0.005092621,-0.011497498,-0.05239868,-0.0042152405,0.0074043274,-0.0317688,0.01247406,0.010757446,-0.019012451,0.0067253113,0.009429932,-0.056762695,0.02456665,0.016036987,0.014129639,0.005290985,0.034362793,-0.0051116943,-0.0038833618,0.018722534,0.027252197,0.016082764,-0.051452637,-0.015571594,0.009590149,-0.00004798174,0.054351807,-0.0029964447,0.040039062,-0.005065918,0.057006836,0.025894165,0.060333252,0.027053833,0.005908966,0.0041160583,-0.026977539,-0.00058555603,0.039733887,-0.031066895,-0.044647217,-0.0064926147,-0.026016235,-0.08544922,-0.014884949,-0.0034694672,-0.042755127,-0.01991272,0.0014066696,-0.025299072,0.05102539,-0.076293945,-0.024612427,0.0024299622,0.023834229,0.00995636,-0.03643799,-0.010971069,0.015159607,-0.0069770813,0.0178833,0.008308411,-0.0016374588,0.025360107,-0.0047454834,0.05581665,0.031021118,0.01259613,0.0073547363,-0.004005432,0.0046920776,-0.039245605,-0.006175995,0.013008118,-0.036956787,0.005256653,0.024765015,-0.03778076,0.02394104,-0.007171631,0.0107803345,-0.028640747,0.0597229,0.013465881,0.0017709732,0.024917603,-0.055664062,-0.021224976,0.022338867,-0.043395996,-0.0034103394,0.023727417,0.004917145,0.0115356445,-0.018417358,-0.027633667,0.011367798,-0.021987915,-0.017181396,-0.03543091,-0.013824463,0.035095215,-0.017654419,0.033355713,0.0002104044,-0.10479736,0.001458168,-0.03567505,0.02760315,-0.037261963,-0.003610611,0.0047073364,0.012908936,-0.01109314,-0.024383545,-0.013931274,-0.023513794,-0.0052452087,0.019866943,0.0046195984,0.06567383,0.010429382,0.033813477,0.03817749,0.009216309,0.036468506,0.03161621,-0.024307251,-0.06201172,-0.076293945,-0.017791748,0.0072021484,-0.02571106,-0.029922485,0.0018997192,-0.021911621,-0.07324219,-0.025161743,0.0059280396,-0.029815674,-0.02407837,0.009544373,-0.028366089,0.0024414062,-0.012420654,-0.06304932,-0.020812988,-0.0107040405,0.07684326,0.023010254,0.01436615,0.015022278,0.014595032,0.03552246,0.0345459,-0.022003174,-0.03137207,0.0052261353,-0.0061454773,0.020584106,0.001531601,0.016677856,-0.0132369995,0.032104492,0.04714966,-0.020004272,-0.0018854141,0.014755249,-0.04171753,-0.054351807,-0.014984131,0.004573822,0.015022278,-0.008148193,0.004108429,-0.037628174,-0.0079193115,0.0018920898,0.025146484,-0.0034122467,0.06719971,0.004295349,0.007724762,0.011871338,0.019363403,-0.04446411,0.03817749,0.04849243,0.024459839,-0.012619019,-0.01878357,0.020187378,0.017730713,-0.019226074,0.0024032593,0.0011472702,0.025405884,0.011116028,0.020507812,0.031951904,-0.022064209,-0.010627747,-0.017974854,0.007320404,0.01285553,0.015411377,-0.0044555664,-0.031341553,-0.07965088,0.046173096,0.0713501,0.023788452,-0.003250122,-0.0055160522,-0.03265381,-0.034576416,-0.057434082,0.04257202,0.05114746,-0.013763428,-0.026504517,0.02319336,-0.015472412,-0.018737793,-0.0317688,-0.008628845,-0.016662598,-0.01838684,-0.017440796,-0.08270264,0.018508911,0.008987427,0.03375244,0.040893555,-0.00048542023,-0.056121826,-0.024475098,0.004627228,0.01159668,-0.030929565,-0.004447937,-0.005428314,0.018371582,0.023223877,0.013679504,0.0178833,-0.009963989,-0.015319824,-0.003042221,0.02267456,0.0033397675,-0.022201538,0.02619934,0.012710571,-0.048858643,0.026748657,0.009597778,0.042633057,-0.029693604,0.03479004,-0.011695862,-0.0048675537,0.049468994,-0.01864624,-0.055511475,0.023880005,-0.01184845,0.052093506,0.052093506,0.01335144,-0.0059547424,0.00081300735,0.06793213,-0.012290955,-0.00248909,0.01260376,0.029922485,0.029968262,-0.010314941,-0.06842041,-0.04055786,-0.001698494,-0.033172607,0.015777588,-0.023162842,0.018585205,0.016082764,0.031143188,-0.018295288,-0.008262634,-0.041778564,0.0065193176,-0.017578125,-0.0052604675,-0.021331787,-0.002746582,0.023361206,0.01776123,-0.00074386597,-0.012496948,0.05343628,0.025115967,-0.013801575,-0.012390137,-0.036102295,-0.026397705,-0.016098022,0.020812988,0.013023376,0.022216797,0.02381897,-0.035827637,0.00737381,0.023345947,-0.0072669983,0.05404663,0.0033187866,-0.00440979,-0.070495605,-0.047546387,-0.023345947,-0.04119873,0.00730896,0.026672363,-0.010284424,0.0524292,-0.01449585,-0.017562866,-0.01889038,0.04006958,-0.032165527,0.009971619,0.036346436,-0.03253174,-0.020065308,-0.007259369,0.008712769,0.021728516,0.024490356,0.010620117,0.018630981,0.090026855,0.042175293,0.010978699,0.016784668,0.044006348,0.0236969,-0.0061798096,0.0029659271,-0.015792847,-0.016204834,0.023513794,-0.02331543,-0.0289917,-0.07550049,0.0602417,0.015335083,0.072509766,0.016586304,0.0030326843,0.03427124,-0.007987976,0.023513794,-0.040985107,-0.04800415,-0.03842163,-0.039855957,0.018295288,-0.005264282,0.012397766,-0.036895752,0.035491943,0.019607544,0.025314331,-0.04006958,0.06518555,-0.0051193237,-0.01701355,0.021942139,0.015571594,0.03817749,0.038116455,-0.026626587,-0.0028858185,0.00920105,-0.049468994,-0.017318726,0.021011353,0.009506226,-0.023513794,-0.058166504,0.0033779144,0.027709961,-0.008796692,-0.059631348,-0.0075798035,0.007801056,0.020629883,0.032318115,-0.028930664,-0.016036987,0.0022277832,-0.017730713,-0.08459473,-0.0063209534,-0.019546509,0.024551392,0.024871826,-0.03475952,0.01939392,0.015991211,0.012214661,-0.015098572,0.014320374,-0.0034732819,-0.0062332153,-0.008872986,0.03894043,0.014518738,0.019500732,0.010482788,0.053741455,0.021438599,0.017059326,0.034454346,0.010139465,-0.00013542175,-0.047210693,0.01461792,-0.06793213,0.0065193176,0.027053833,-0.02798462,0.010795593,-0.011116028,-0.03475952,-0.011749268,0.004009247,-0.009864807,0.009933472,0.022354126,-0.03967285,-0.030517578,-0.048675537,-0.011764526,0.007675171,0.060028076,0.018585205,-0.00868988,-0.0362854,-0.00856781,0.014305115,0.00522995,0.0024662018,-0.013374329,-0.019332886,-0.03845215,-0.0027866364,-0.024978638,-0.0047340393,0.024719238,0.010971069,-0.0056114197,0.014266968,-0.0051574707,-0.00079393387,-0.01687622,0.0049095154,0.02458191,-0.029418945,0.012573242,-0.008605957,0.027374268,-0.009613037,-0.03439331,-0.050445557,0.034454346,-0.006668091,0.034362793,-0.028030396,0.010421753,0.011543274,0.014640808,0.007209778,-0.028060913,0.0025348663,0.004627228,-0.021835327,-0.083618164,0.047668457,-0.014251709,0.015640259,-0.0048446655,-0.010475159,0.029846191,-0.0018033981,0.019317627,0.02772522,-0.034606934,-0.015007019,-0.036712646,-0.02015686,-0.025344849,0.008468628,-0.010971069,0.024719238,-0.017303467,0.020370483,-0.008033752,-0.02659607,0.016433716,-0.0069274902,-0.0074272156,0.027908325,-0.0009160042,0.00434494,0.053253174,0.008987427,-0.048950195,0.040740967,0.0017004013,-0.007083893,-0.016967773,0.05529785,0.014419556,-0.010116577,0.012565613,-0.017684937,0.0013370514,-0.015991211,-0.002483368,0.0026054382,0.05239868,0.015197754,-0.04812622,0.019882202,0.01828003,-0.032562256,-0.011642456,0.023864746,0.019104004,-0.050109863,0.0070343018,0.011909485,0.04071045,-0.032836914,0.006175995,0.006755829,0.046020508,0.019180298,0.018600464,-0.0038585663,0.013183594,-0.02279663,0.018325806,0.007434845,-0.020523071,-0.024719238,-0.0021915436,0.032440186,0.01449585,0.0021190643,-0.004722595,-0.011116028,-0.011451721,0.0021438599,-0.025161743,0.0128479,0.008399963,0.014793396,0.0006198883,0.01209259,0.035888672,-0.04095459,-0.0065727234,0.0052337646,0.040893555,-0.0061454773,-0.018112183,0.02961731,0.0032749176,0.04547119,-0.04067993,-0.020050049,0.0039901733,0.000541687,-0.013679504,-0.066467285,-0.018173218,-0.006931305,0.019363403,-0.015388489,0.008605957,0.033325195,-0.004623413,-0.0025367737,0.016448975,0.017028809,-0.02305603,-0.007144928,-0.062286377,-0.0030784607,-0.0029144287,-0.0075912476,-0.017181396,0.013435364,-0.040008545,-0.020553589,0.005180359,-0.019195557,-0.005569458,-0.0055732727,-0.012268066,0.03616333,-0.02305603,0.008598328,-0.013450623,-0.025024414,-0.01399231,0.008117676,0.02973938,-0.055267334,0.017608643,-0.008110046,0.002002716,-0.008262634,-0.0063934326,0.024276733,0.0031967163,0.0178833,0.037322998,-0.041656494,0.038879395,-0.036346436,0.004878998,0.004272461,-0.006793976,0.0009403229,-0.022964478,-0.017807007,0.04309082,-0.0090408325,-0.010635376,-0.01763916,-0.03012085,-0.010925293,-0.04623413,0.021377563,0.022003174,0.049072266,-0.023452759,-0.0026359558,0.016784668,0.0209198,-0.004219055,-0.025421143,-0.0056419373,0.0124435425,0.0103302,0.0048828125,-0.012435913,-0.024291992,-0.021087646,-0.004512787,-0.04800415,-0.050872803,-0.01285553,0.017730713,0.0063934326,-0.02722168,-0.030639648,-0.019577026,0.0044403076,-0.0357666,0.004005432,-0.022415161,0.017623901,-0.000003695488,-0.007537842,0.011657715,0.0055999756,-0.034423828,0.02911377,0.0015287399,-0.010292053,-0.015220642,-0.014541626,0.019515991,-0.009490967,-0.0070533752,-0.023590088,-0.015945435,-0.014343262,-0.06088257,0.015182495,-0.008934021,0.015312195,-0.012832642,-0.007144928,-0.038513184,-0.010505676,-0.02507019,-0.0020103455,-0.0059280396,0.02357483,0.010978699,0.008026123,-0.003643036,-0.00047445297,-0.025283813,-0.022003174,-0.0011205673,0.009117126,-0.010261536,0.01374054,0.04373169,0.0036449432,-0.017227173,-0.0020103455,0.0073928833,0.014228821,-0.029220581,-0.0072517395,0.000849247,0.028656006,-0.023880005,-0.020858765,-0.031219482,0.005874634,0.06768799,-0.012428284,-0.01474762,-0.00630188,-0.0043144226,0.021697998,0.040039062,-0.03753662,0.016662598,-0.035186768,0.02229309,-0.03375244,0.031143188,0.0035991669,0.035583496,-0.017440796,-0.036132812,0.013824463,0.033172607,-0.010131836,-0.06793213,-0.017562866,-0.07397461,-0.006072998,-0.020324707,-0.017684937,-0.00011175871,-0.0049819946,-0.025421143,-0.07092285,0.010421753,0.046844482,0.012634277,0.005744934,-0.010871887,0.0051345825,0.017623901,-0.016082764,-0.036621094,0.015670776,-0.018478394,0.003566742,-0.02319336,0.028427124,-0.019454956,-0.017227173,0.025283813,-0.0050201416,0.02230835,-0.009223938,0.010673523,-0.015731812,-0.006462097,-0.0051994324,0.001083374,-0.006126404,-0.014442444,0.033294678,-0.054138184,0.024017334,0.007133484,0.025558472,0.009689331,0.017578125,0.024597168,-0.037231445,0.0012216568,0.014984131,0.006385803,0.024795532,-0.02067566,0.04815674,0.01309967,-0.0012283325,0.013389587,-0.02671814,0.005126953,-0.060424805,-0.024261475,0.032958984,-0.006629944,0.0055732727,-0.017532349,0.00083208084,0.007133484,-0.009498596,-0.010543823,-0.011810303,-0.0022716522,-0.0234375,0.022705078,0.0019741058,0.030441284,-0.00069475174,0.023910522,0.04815674,0.046447754,0.0029697418,0.001996994,-0.0016298294,0.016571045,-0.021530151,-0.0011291504,0.01436615,0.019729614,0.004058838,0.015037537,0.01626587,-0.039215088,-0.027755737,-0.000054597855,-0.024627686,0.012672424,-0.025360107,0.009361267,-0.00046634674,0.013298035,-0.0128479,-0.026519775,-0.00013256073,-0.019226074,-0.019104004,-0.009483337,0.012359619,0.005645752,0.010467529,-0.0085372925,0.009468079,-0.0072517395,0.03692627,-0.0013694763,-0.010467529,0.027832031,0.045898438,0.0067634583,-0.012435913,-0.0041122437,-0.013725281,-0.00057029724,-0.0042495728,-0.002822876,0.018737793,0.02142334,-0.0098724365,0.035827637,-0.011894226,0.061279297,-0.008224487,0.012420654,0.008605957,0.0087509155,0.0037612915,0.04574585,-0.032836914,0.0051460266,0.014831543,-0.018981934,-0.010597229,-0.007972717,-0.021331787,0.020812988,0.0063819885,-0.016616821,0.020446777,0.009780884,0.013641357,-0.040100098,-0.013900757,-0.002204895,-0.043151855,-0.031707764,0.016815186,-0.016723633,-0.013038635,0.019714355,-0.02619934,0.0012969971,-0.011367798,0.018203735,-0.00012898445,0.02015686,-0.018875122,-0.023071289,-0.017852783,-0.015655518,-0.023727417,0.004840851,0.0004544258,0.048461914,0.026473999,0.018844604,0.02381897,0.023345947,0.01222229,-0.044677734,-0.01701355,0.008972168,-0.008705139,0.009735107,-0.017578125,0.048034668,0.06414795,0.009757996,0.031341553,0.042633057,0.04171753,-0.01272583,0.010505676,-0.0043563843,0.017990112,-0.032958984,0.029006958,-0.009391785,0.02923584,-0.018417358,0.021865845,0.0031261444,0.02709961,-0.03012085,0.02355957,0.06768799,0.0121154785,-0.009117126,0.034301758,-0.009284973,-0.0046653748,-0.0054512024,-0.021621704,0.049865723,0.010612488,0.03829956,0.02861023,0.002653122,-0.026428223,0.03567505,-0.004146576,-0.026000977,0.055908203,-0.0055770874,-0.0041999817,-0.009239197,-0.003112793,0.021759033,-0.060699463,-0.022109985,0.024719238,-0.0034389496,-0.0042762756,-0.0034542084,0.0065994263,-0.0008854866,0.020019531,-0.0052757263,0.025665283,-0.02607727,0.0011405945,0.0143585205,0.009468079,0.014892578,0.010879517,0.034729004,-0.01663208,-0.023544312,0.005191803,0.025421143,0.011146545,-0.00818634,0.02420044,0.012336731,0.043640137,0.031280518,-0.01625061,0.0027008057,0.033447266,0.004886627,-0.013290405,0.05038452,0.019424438,0.019058228,0.04272461,0.04208374,0.033294678,-0.018478394,0.014831543,0.005809784,-0.005748749,-0.015213013,0.0048599243,0.018249512,-0.0031261444,0.034179688,-0.006126404,-0.0046157837,0.01651001,0.03149414,-0.015159607,-0.002632141,-0.0079422,-0.002002716,-0.011039734,-0.013931274,0.019363403,-0.014785767,0.0025024414,0.023513794,0.0135650635,-0.04660034,0.01651001,0.0056991577,-0.022155762,-0.011985779,0.018722534,-0.05215454,0.0074653625,0.0062675476,-0.017074585,-0.027450562,0.019256592,0.013626099,-0.011238098,0.03768921,0.00217247,0.0074424744,0.010192871,0.018356323,0.029067993,0.004043579,-0.008674622,-0.010040283,0.002910614,0.03314209,-0.017959595,-0.0068511963,-0.022399902,0.005607605,0.0362854,-0.017959595,-0.018463135,0.002708435,-0.013374329,-0.027359009,0.0033435822,0.043151855,0.010757446,0.032562256,-0.012184143,-0.018463135,-0.005722046,0.047546387,0.003967285,-0.020050049,-0.035217285,0.010025024,-0.0209198,0.04421997,0.058166504,-0.013954163,0.0045166016,-0.0132369995,-0.027862549,-0.0022468567,-0.019363403,0.016708374,-0.02508545,0.007904053,0.007434845,0.01977539,-0.028366089,-0.021270752,-0.007091522,-0.031173706,-0.020187378,-0.021942139,0.0057678223,0.00068569183,0.037231445,0.018981934,0.028762817,-0.016021729,0.062927246,-0.010398865,0.05807495,0.0030136108,-0.014770508,0.038604736,0.031463623,0.030014038,0.014945984,0.024505615,-0.027877808,-0.0038280487,0.024642944,0.0093688965,0.012817383,0.0026512146,-0.012069702,0.041748047,-0.023010254,0.030395508,-0.0066986084,-0.008224487,0.0064048767,-0.026351929,-0.01651001,0.00040650368,-0.006072998,-0.0075035095,0.042022705,-0.010253906,-0.0107421875,-0.018035889,-0.015640259,0.03274536,-0.004135132,0.0037460327,-0.002872467,-0.02458191,0.01965332,-0.011184692,-0.018127441,0.0058631897,0.019256592,-0.037353516,-0.011421204,0.002439499,0.01991272,-0.015396118,0.035858154,0.036254883,-0.001411438,-0.0015325546,0.045013428,-0.0062332153,0.031143188,0.0003244877,0.056732178,0.036315918,0.014305115,0.004146576,0.025375366,0.033599854,-0.013534546,0.008651733,0.041748047,-0.0016717911,0.01374054,-0.010185242,-0.013076782,0.012054443,-0.008659363,-0.022705078,-0.0046310425,-0.027999878,-0.0037059784,-0.00072574615,0.003692627,-0.0022964478,0.016296387,-0.015037537,-0.011650085,0.0054893494,0.03930664,0.013320923,-0.048309326,-0.0012331009,0.014129639,0.016174316,-0.019515991,-0.014732361,0.00945282,-0.045410156,0.00014483929,0.02810669,-0.006126404,-0.0006957054,-0.014732361,-0.0017471313,0.052856445,0.015586853,0.007865906,0.021118164,-0.020111084,0.024475098,-0.00012564659,0.001657486,0.0006351471,-0.013160706,-0.0017051697,0.022369385,-0.012680054,-0.0060539246,0.019195557,0.013427734,0.020584106,0.0039711,0.013626099,0.028030396,-0.015975952,-0.0066604614,0.00415802,0.024765015,-0.035247803,-0.044281006,-0.017166138,0.01789856,0.048614502,-0.015670776,-0.007835388,-0.018981934,0.033447266,0.03152466,0.04248047,0.0069847107,0.042297363,0.010803223,0.004966736,-0.0075302124,0.0008368492,0.0052337646,-0.025497437,0.013397217,-0.024215698,-0.0076179504,0.0030937195,0.024291992,0.0074424744,-0.015335083,-0.018585205,-0.008079529,-0.009399414,0.01864624,-0.023727417,0.020690918,-0.02067566,-0.016433716,0.014518738,0.005584717,-0.019989014,-0.038635254,-0.010009766,-0.002620697,-0.06951904,0.009963989,-0.019226074,-0.0044937134,-0.01537323,0.0013942719,-0.020385742,0.024093628,0.00056266785,-0.0096206665,0.0044174194,0.01914978,-0.00055885315,0.0038719177,0.038726807,-0.021316528,-0.027954102,-0.0032138824,-0.013893127,0.000018179417,0.032318115,-0.02658081,0.03567505,0.008132935,-0.005268097,0.00491333,-0.012184143,-0.01701355,0.008285522,-0.044158936,-0.012832642,0.0064468384,0.017059326,0.0049934387,0.0078048706,0.03668213,-0.025787354,-0.01927185,0.032989502,0.05065918,0.0025730133,0.06347656,-0.02508545,-0.0019512177,-0.035888672,0.0005121231,-0.006752014,0.011444092,0.012763977,0.011779785,0.005302429,0.023239136,0.018051147,-0.013298035,-0.019500732,0.027404785,0.02204895,-0.0027885437,0.036743164,0.010803223,0.0128479,-0.027908325,-0.011146545,0.008796692,0.033966064,0.015686035,0.013122559,-0.024871826,0.007019043,-0.0060653687,0.005592346,0.030715942,-0.024902344,-0.04067993,-0.0079956055,-0.025863647,0.0077667236,0.002193451,0.013473511,-0.0045547485,0.006713867,-0.043945312,-0.021728516,-0.021377563,0.020935059,0.011016846,-0.012748718,-0.003868103,0.000446558,-0.0068244934,-0.032714844,-0.0048828125,-0.045959473,-0.026473999,0.0008444786,-0.0077819824,0.015670776,0.006752014,-0.013549805,0.011909485,0.0008068085,-0.010139465,0.002008438,0.02508545,-0.0025691986,-0.0033435822,0.020935059,0.015037537,-0.014541626,-0.00003916025,-0.008514404,-0.0066452026,0.030593872,0.0026836395,0.010635376,0.00036621094,0.017227173,0.01725769,0.0053749084,0.045318604,-0.013221741,0.027786255,-0.030044556,-0.009315491,0.0005378723,-0.01852417,0.03375244,-0.014213562,-0.03567505,-0.018600464,-0.011131287,-0.02229309,0.020111084,0.008888245,0.03717041,-0.0023174286,0.043548584,-0.02017212,-0.028915405,0.017288208,0.009254456,-0.017166138,0.0013055801,0.017303467,0.013122559,0.027709961,-0.00289917,0.004573822,-0.0234375,-0.008407593,-0.0020065308,-0.008399963,-0.010719299,-0.008811951,0.01586914,0.027282715,0.006500244,0.006511688,0.030395508,0.016815186,0.029281616,0.0093307495,0.04458618,0.020812988,-0.025939941,0.011520386,0.009185791,-0.018569946,-0.011817932,-0.0019550323,0.018615723,-0.02760315,-0.0009059906,-0.004085541,0.04006958,-0.010108948,0.012962341,-0.012420654,-0.009635925,-0.052734375,-0.0048980713,-0.042236328,0.011329651,0.019439697,0.0031528473,0.019104004,0.016693115,-0.0357666,0.002527237,0.025512695,-0.0023784637,-0.051879883,-0.01210022,0.002691269,0.007270813,0.0036354065,0.017715454,-0.02331543,-0.018341064,0.004058838,0.008117676,-0.0073928833,-0.018829346,0.02268982,0.029418945,-0.009162903,-0.028137207,0.026168823,0.016784668,-0.0051231384,0.010848999,0.0044898987,0.042175293,0.0395813,0.0027275085,0.02658081,0.024093628,-0.03338623,0.066223145,-0.014503479,0.02053833,-0.015525818,-0.0132751465,-0.027786255,-0.009216309,-0.0019989014,-0.0016641617],"createdAt":"2026-04-18T18:39:14.766Z","updatedAt":"2026-04-28T10:05:12.947Z","lastSeenAt":"2026-04-28T10:05:12.947Z","tsv":"'/api':159 '/api/v1/accounts/11/balance':46 '/docs':157 '/pricing':158 '/readme':161 '0.02':113,202 '000':108 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':127 '1':99 '20':107 'Base network API' 'USDC pay-per-call' 'access':41,143 'account':4,18,86 'account balance API' 'account-balance' 'actual':191 'address':120 'advertis':142 'ai/ml':66 'analyt':65 'api':40,61,136 'asset':125 'balanc':5,19,87,189 'base':8,22,77,109,123,134 'base-network' 'broader':52 'call':12,26 'canon':130 'challeng':151 'connect':167 'content':173 'contract':126,132 'crypto payment API' 'data':64,69 'descript':185 'detail':184,209 'document':152,217 'dozen':56 'endpoint':6,20,30,62,83,190,200 'exact':100 'exampl':181 'extrem':154 'finance/web3':68 'function':214 'gate':3,17,60,145 'http':90 'infer':67 'inform':88 'key':137 'land':196 'limit':140 'list':198 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':199 'maximum':105 'minim':216 'network':78 'no-api-key' 'offer':55 'openapi':177 'page':162,197 'paid':117 'part':49 'path':45 'pay':10,24,36 'pay-per-cal':9,23 'pay-per-request':35 'payment':96,150 'per':11,25,37,115 'platform':53,194 'post':91 'premium':39 'probe':84 'prompt':169 'protocol':97 'provid':33,205 'pure':146 'rate':139 'render':164 'request':38,116 'request/response':180 'requir':103 'resourc':42 'return':85,192 'schema':178 'scheme':101 'servic':72,218 'settl':74 'span':63 'spars':155 'specif':82 'substant':172 'technic':208 'treat':210 'unit':110 'usd':114 'usdc':14,28,80,112,131 'usdc-settlement' 'use':79,93 'util':71 'version':98 'via':89 'wallet':168 'x402':2,16,59,95,149 'x402 API' 'x402-gated':1,15,58 'x402-payment'","prices":[{"id":"e8d1e642-04fb-4ef6-9508-caae1e0e6cc7","listingId":"d9bc360f-4dd5-42db-9b45-4994fbf966b9","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/11/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":"2026-04-18T18:39:14.766Z"}],"sources":[{"listingId":"d9bc360f-4dd5-42db-9b45-4994fbf966b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/11/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:14.766Z","lastSeenAt":"2026-04-28T10:05:12.947Z"}],"details":{"listingId":"d9bc360f-4dd5-42db-9b45-4994fbf966b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/11/balance\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with a valid x402 payment proof to access the resource.","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/11/balance"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/11/balance"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating pay-per-call balance lookups into agent workflows","Accessing financial data without API key registration"],"bestFor":["Agents or services that need keyless, pay-per-call account balance queries","Developers experimenting with x402 payment protocol integrations","Use cases requiring low-friction API access without subscriptions"],"notFor":["Production workloads requiring detailed API documentation and SLAs","High-volume batch queries where per-request pricing is inefficient","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.463Z"},"updatedAt":"2026-04-28T10:05:12.947Z"}}