{"id":"c8303eae-797e-4e70-bf2b-3e1f4c989ac3","shortId":"xPgTG9","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 API for retrieving account balance information. It is part of a broader platform that offers dozens of x402-gated endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/accounts/200/balance` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The maximum amount required is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a timeout of 300 seconds.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely sparse — the docs, API, pricing, 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 explanation of what the balance endpoint actually returns or what parameters it accepts. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know exactly what data is returned or how to structure a request body.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","pay-per-request","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["account balance API","x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","All documentation pages (docs, API, pricing, README) are empty — only show 'Connect wallet'","No request body schema or response schema provided — unclear what parameters are accepted or what data is returned","The endpoint path includes a hardcoded account ID (200); it is unclear if this is parameterizable or what accounts are available","The broader platform lists many endpoints but none appear to have detailed documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/200/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/200/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, confirming it works. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs showing only 'Connect wallet'. The purpose of this specific endpoint (account balance for account ID 200) is unclear and undocumented.","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":"2026-04-19T01:47:25.091Z","embedding":[-0.008651733,0.0073242188,0.044067383,0.017211914,0.0134887695,-0.044189453,-0.0074043274,0.012168884,0.08300781,-0.0657959,0.026107788,-0.06774902,-0.049835205,-0.04260254,-0.0039138794,0.023925781,-0.023529053,0.024429321,-0.057281494,0.044647217,0.006500244,-0.021591187,-0.00920105,0.045196533,-0.01398468,-0.033599854,-0.0061416626,-0.032592773,-0.038635254,-0.047454834,0.03970337,-0.022949219,-0.010398865,0.019973755,0.008392334,0.01637268,0.0019626617,0.029800415,0.043914795,-0.017044067,-0.02204895,-0.042541504,0.00024724007,0.0015153885,-0.038604736,0.009628296,0.010665894,-0.025100708,0.009887695,0.007713318,-0.0496521,0.016357422,0.011962891,0.02532959,0.012550354,0.036224365,-0.0010700226,-0.013328552,0.024993896,0.030227661,0.011161804,-0.052093506,-0.013702393,0.0011320114,0.003080368,0.051513672,0.0021095276,0.036834717,-0.007461548,0.054473877,0.01689148,0.059295654,0.034851074,0.0073661804,-0.0055732727,-0.019943237,0.017959595,0.038726807,-0.027389526,-0.051116943,-0.01663208,-0.03286743,-0.079711914,-0.013450623,-0.011207581,-0.04043579,-0.020355225,0.0033664703,-0.020324707,0.048858643,-0.07952881,-0.015945435,0.01612854,0.032073975,0.015335083,-0.046295166,-0.0107803345,0.01751709,-0.005168915,0.0052757263,0.0048828125,-0.008033752,0.026687622,-0.017181396,0.048950195,0.04446411,0.0042381287,0.016555786,-0.0033073425,0.0053215027,-0.035186768,-0.0018806458,0.002483368,-0.04360962,0.0021324158,0.013694763,-0.039215088,0.0116119385,-0.013305664,0.0017976761,-0.030471802,0.07489014,0.018630981,0.0054893494,0.026535034,-0.05557251,-0.02053833,0.014793396,-0.044891357,0.011886597,0.029312134,0.008201599,0.018218994,-0.017211914,-0.03967285,0.013130188,-0.018249512,-0.016586304,-0.032440186,-0.009414673,0.03149414,-0.016860962,0.012496948,0.0007457733,-0.107421875,-0.005104065,-0.027191162,0.01626587,-0.032165527,-0.0056877136,0.0033512115,0.017364502,-0.013755798,-0.012634277,-0.0067634583,-0.018707275,0.0018949509,0.02053833,0.015350342,0.061950684,-0.0006303787,0.038360596,0.03414917,-0.003479004,0.030441284,0.04309082,-0.030075073,-0.06439209,-0.072143555,-0.021484375,0.0072364807,-0.03086853,-0.029937744,0.0004274845,-0.024154663,-0.06774902,-0.011543274,0.0038871765,-0.03062439,-0.031341553,0.0044441223,-0.014984131,0.011505127,-0.016723633,-0.053375244,-0.016189575,-0.019226074,0.065979004,0.030853271,0.02420044,0.0036621094,0.0068855286,0.033447266,0.04034424,-0.01171875,-0.03366089,0.008842468,-0.007041931,0.011734009,0.0061950684,0.025772095,-0.015533447,0.024780273,0.049987793,-0.016738892,-0.009757996,0.022125244,-0.040405273,-0.053253174,-0.016189575,0.014656067,0.010353088,-0.015701294,0.00440979,-0.03503418,-0.015609741,0.009376526,0.021347046,-0.0010814667,0.072265625,0.0037059784,0.007209778,0.013694763,0.02180481,-0.05456543,0.032348633,0.057525635,0.020385742,-0.00068712234,-0.018341064,0.022155762,0.014205933,-0.019927979,0.0013055801,-0.0015449524,0.023468018,0.010375977,0.021331787,0.020324707,-0.007396698,0.00067949295,-0.012863159,-0.005836487,0.0073776245,0.014579773,-0.010284424,-0.03488159,-0.0892334,0.049041748,0.05606079,0.023010254,-0.0017433167,-0.0033035278,-0.035980225,-0.034179688,-0.05984497,0.04522705,0.060943604,-0.0037994385,-0.025756836,0.024902344,-0.008987427,-0.027664185,-0.020965576,-0.010353088,-0.020584106,-0.019485474,-0.019363403,-0.0758667,0.025558472,0.004447937,0.034332275,0.0390625,-0.00013613701,-0.05697632,-0.013656616,0.0074310303,0.008277893,-0.03062439,0.00039577484,-0.011367798,0.020095825,0.022949219,0.009063721,0.026184082,-0.0069770813,-0.025314331,-0.008598328,0.028671265,0.014305115,-0.017944336,0.0317688,0.011756897,-0.03768921,0.028244019,0.0005841255,0.05041504,-0.035217285,0.038146973,-0.017654419,0.0038490295,0.04547119,-0.014053345,-0.05041504,0.022750854,-0.0061073303,0.034088135,0.058624268,0.025650024,-0.005783081,-0.006839752,0.057891846,-0.011978149,0.006549835,0.011009216,0.028671265,0.033172607,-0.013557434,-0.074157715,-0.03665161,-0.00049734116,-0.025924683,0.024841309,-0.016906738,0.010253906,0.0021266937,0.03012085,-0.027435303,-0.009895325,-0.04345703,-0.006958008,-0.018371582,0.013450623,-0.01449585,-0.012466431,0.0211792,0.017501831,-0.010604858,-0.013267517,0.046569824,0.024734497,-0.023284912,-0.0037555695,-0.037078857,-0.029266357,-0.022003174,0.022491455,0.014862061,0.01637268,0.015525818,-0.027893066,-0.0034484863,0.019241333,-0.016647339,0.052520752,0.007171631,-0.010269165,-0.07104492,-0.05154419,-0.024414062,-0.03756714,0.014434814,0.012626648,-0.011146545,0.051361084,-0.0048179626,-0.022750854,-0.032043457,0.031021118,-0.03363037,0.0066719055,0.027053833,-0.037841797,-0.014907837,-0.010238647,0.005443573,0.021881104,0.029663086,0.014373779,0.02558899,0.09088135,0.0423584,0.0058670044,0.011009216,0.038391113,0.025131226,-0.0019235611,0.011756897,-0.013130188,-0.016464233,0.036010742,-0.01953125,-0.02180481,-0.068481445,0.06781006,0.019317627,0.07141113,0.01071167,0.004562378,0.029724121,-0.013969421,0.027938843,-0.045166016,-0.043304443,-0.03363037,-0.041229248,0.017486572,-0.013404846,0.022918701,-0.03677368,0.039367676,0.009986877,0.018310547,-0.043518066,0.06414795,-0.0128479,-0.017944336,0.02255249,0.014724731,0.036132812,0.036956787,-0.034820557,-0.009277344,0.0024871826,-0.04232788,-0.015022278,0.026428223,-0.007297516,-0.024261475,-0.058624268,-0.0126571655,0.024215698,-0.008583069,-0.064697266,-0.009613037,0.015472412,0.031204224,0.024139404,-0.022705078,-0.023361206,0.0038223267,-0.01966858,-0.0836792,0.002380371,-0.0234375,0.010383606,0.020935059,-0.031463623,0.034484863,0.011383057,0.019927979,-0.018844604,0.017242432,0.002664566,-0.0012350082,-0.010017395,0.04446411,0.00831604,0.018295288,0.012832642,0.048095703,0.020248413,0.026031494,0.03817749,0.0211792,-0.0054740906,-0.04949951,0.017532349,-0.062927246,0.014228821,0.028030396,-0.038604736,0.0129776,-0.0057296753,-0.025802612,-0.012428284,0.013366699,-0.006576538,0.009796143,0.022949219,-0.042633057,-0.03475952,-0.050720215,-0.024536133,0.0141067505,0.06286621,0.010620117,-0.0019664764,-0.035003662,-0.002363205,0.020202637,0.009246826,0.0105896,-0.013175964,-0.014968872,-0.044891357,-0.009208679,-0.027511597,0.00080776215,0.019973755,0.006526947,-0.006832123,0.013969421,0.00089120865,-0.002204895,-0.017410278,0.003522873,0.013931274,-0.023788452,0.012901306,-0.0014429092,0.032470703,-0.007347107,-0.04067993,-0.054656982,0.037506104,-0.0034294128,0.028839111,-0.033477783,0.002204895,0.0075683594,0.013656616,0.004207611,-0.023345947,0.0040397644,0.012901306,-0.021148682,-0.086120605,0.04309082,-0.008926392,0.018508911,0.008430481,-0.014053345,0.028289795,-0.0010232925,0.018569946,0.0137786865,-0.027893066,-0.016174316,-0.034332275,-0.0206604,-0.03326416,0.0056533813,-0.013427734,0.01876831,-0.018356323,0.019958496,-0.0035266876,-0.02142334,0.020141602,-0.007255554,0.0038318634,0.021759033,0.00032424927,0.010025024,0.046875,0.01676941,-0.05722046,0.03945923,-0.001537323,0.0022220612,-0.00730896,0.052612305,0.023101807,-0.010910034,0.008277893,-0.019012451,-0.00039172173,-0.022613525,-0.0054016113,0.0039138794,0.05026245,0.021865845,-0.0541687,0.021133423,0.019546509,-0.039245605,-0.02015686,0.022506714,0.015640259,-0.05432129,0.010375977,0.008148193,0.041137695,-0.027633667,0.006450653,-0.00021588802,0.043762207,0.0181427,0.01966858,0.0046157837,0.012145996,-0.019210815,0.021957397,0.013450623,-0.022216797,-0.028717041,-0.0034542084,0.027557373,0.006958008,-0.0014066696,0.0066833496,-0.011222839,-0.017837524,-0.00092077255,-0.024032593,0.019638062,0.015945435,0.015037537,-0.0065307617,0.014480591,0.035858154,-0.030700684,-0.0059318542,0.007286072,0.036590576,-0.0031337738,-0.014297485,0.03250122,0.0048713684,0.042785645,-0.033355713,-0.022155762,0.0050849915,0.00579834,-0.021484375,-0.05923462,-0.023376465,-0.01108551,0.027328491,-0.014381409,0.0032310486,0.034820557,-0.000057041645,-0.00038838387,0.0076942444,0.024505615,-0.02583313,-0.003818512,-0.051757812,-0.012084961,-0.012428284,-0.0028629303,-0.02267456,0.020248413,-0.034606934,-0.027633667,0.011039734,-0.022888184,0.0021381378,-0.012001038,-0.012001038,0.037139893,-0.027862549,0.009841919,-0.013641357,-0.0340271,-0.018630981,0.012458801,0.02545166,-0.06347656,0.018051147,0.0017900467,-0.0038337708,-0.013557434,-0.0010929108,0.0143966675,0.0135650635,0.021316528,0.040374756,-0.047943115,0.036102295,-0.041992188,-0.0010662079,-0.0016441345,-0.0062789917,-0.0046691895,-0.025878906,-0.004611969,0.04083252,-0.0053749084,-0.0029964447,-0.023483276,-0.030349731,-0.015510559,-0.050872803,0.027328491,0.015060425,0.048583984,-0.02394104,-0.0038471222,0.015235901,0.02658081,-0.0006465912,-0.013442993,-0.004360199,0.017196655,0.014190674,0.0041275024,-0.017593384,-0.03189087,-0.02859497,-0.0028934479,-0.050689697,-0.0491333,-0.00027823448,0.01751709,0.011245728,-0.020553589,-0.025268555,-0.02810669,-0.00055933,-0.028030396,0.012641907,-0.020523071,0.018630981,0.0019454956,-0.0057525635,0.010597229,-0.00028944016,-0.029296875,0.03881836,0.005542755,-0.012321472,-0.015571594,-0.019180298,0.014709473,-0.0040283203,0.0008125305,-0.02218628,-0.021087646,-0.0140686035,-0.056365967,0.02180481,-0.012290955,0.023788452,-0.021560669,-0.0020160675,-0.04537964,-0.013305664,-0.023345947,-0.013465881,0.0013542175,0.022979736,0.0053863525,0.00756073,0.0033187866,-0.0016880035,-0.018859863,-0.017822266,-0.00907135,0.009231567,-0.0043411255,0.019927979,0.04574585,-0.006000519,-0.014694214,-0.0058631897,-0.002603531,0.0116119385,-0.024856567,-0.009933472,0.00077819824,0.023086548,-0.018753052,-0.014595032,-0.03994751,0.006790161,0.059143066,-0.0132751465,-0.017425537,-0.021377563,-0.00091314316,0.018325806,0.037902832,-0.030975342,0.015586853,-0.029800415,0.02520752,-0.02810669,0.031219482,0.00024461746,0.03366089,-0.016311646,-0.037109375,0.008026123,0.037994385,-0.013023376,-0.06488037,-0.013175964,-0.0826416,-0.005329132,-0.017562866,-0.013061523,0.0041885376,-0.001953125,-0.03062439,-0.060791016,0.010894775,0.0541687,0.011985779,0.008995056,-0.000051021576,0.0048217773,0.016357422,-0.023773193,-0.02217102,0.009490967,-0.02557373,-0.008995056,-0.023880005,0.031921387,-0.01651001,-0.01512146,0.014945984,-0.0046691895,0.018463135,-0.005458832,0.0060195923,-0.014732361,-0.0023822784,-0.004371643,0.00021731853,-0.0023975372,-0.010765076,0.032592773,-0.052215576,0.028640747,0.004310608,0.025466919,0.0077056885,0.018249512,0.025344849,-0.03778076,0.0014257431,-0.0014533997,-0.00010550022,0.019165039,-0.018981934,0.040161133,0.012336731,-0.0057678223,0.0063972473,-0.021652222,0.014533997,-0.050842285,-0.03387451,0.03366089,-0.00881958,0.0006098747,-0.012626648,-0.004234314,0.010154724,-0.0054779053,-0.004875183,-0.010879517,-0.0018024445,-0.024246216,0.018753052,-0.0015306473,0.033966064,0.0071144104,0.021469116,0.04220581,0.040618896,0.011764526,-0.001958847,-0.0027980804,0.023025513,-0.017150879,0.0031833649,0.016983032,0.020248413,0.009712219,0.015411377,0.01777649,-0.038146973,-0.027252197,-0.0002655983,-0.015808105,0.012954712,-0.023895264,0.011390686,0.0018262863,0.0068473816,-0.021102905,-0.026046753,-0.0043258667,-0.017364502,-0.011489868,-0.0045433044,0.009712219,0.014656067,0.011154175,-0.010421753,0.007762909,-0.006324768,0.03302002,-0.00015866756,-0.007587433,0.023086548,0.043029785,0.0041885376,-0.017181396,-0.0022392273,-0.01184845,-0.00022125244,0.0022621155,-0.008338928,0.022735596,0.019592285,-0.010932922,0.03262329,-0.008216858,0.05432129,-0.0115737915,0.013153076,0.009559631,0.012916565,0.012535095,0.046203613,-0.034301758,0.0046157837,0.017196655,-0.023239136,-0.004825592,-0.0146865845,-0.014221191,0.012283325,0.009284973,-0.0104904175,0.017913818,0.01335144,0.017303467,-0.028884888,-0.015655518,-0.000021278858,-0.041748047,-0.03744507,-0.0007109642,-0.01828003,-0.0135650635,0.015220642,-0.019042969,0.0039138794,-0.010482788,0.023635864,0.0021572113,0.016433716,-0.012283325,-0.025848389,-0.010475159,-0.019104004,-0.025375366,0.009422302,-0.008239746,0.048583984,0.028244019,0.019073486,0.033355713,0.022399902,0.0041160583,-0.042907715,-0.014572144,0.00687027,-0.0064888,0.014572144,-0.024215698,0.048339844,0.0625,0.008682251,0.02407837,0.036071777,0.038208008,-0.006248474,0.0067443848,-0.0045700073,0.016174316,-0.023483276,0.022720337,-0.007827759,0.029266357,-0.017959595,0.02999878,0.005531311,0.026733398,-0.026031494,0.026809692,0.068237305,0.023269653,-0.00730896,0.038635254,-0.017333984,-0.017440796,-0.008583069,-0.02406311,0.045196533,0.011680603,0.037506104,0.02381897,-0.0020542145,-0.021408081,0.04360962,-0.00020742416,-0.02746582,0.055023193,0.0037956238,-0.010231018,-0.013946533,-0.00082826614,0.02645874,-0.058044434,-0.027038574,0.026977539,-0.019592285,-0.00032544136,-0.002374649,0.0033607483,0.0073928833,0.00642395,0.0024414062,0.028411865,-0.024291992,0.008468628,0.017501831,0.0029830933,0.019927979,0.01537323,0.037963867,-0.018417358,-0.022140503,0.0044403076,0.013290405,0.017578125,-0.011161804,0.035614014,0.0140686035,0.036743164,0.02909851,-0.01914978,0.009132385,0.029769897,0.0017995834,-0.0047073364,0.050811768,0.024047852,0.033721924,0.042419434,0.034454346,0.031219482,-0.018966675,0.023498535,0.0032844543,-0.002691269,-0.01197052,0.006275177,0.019454956,-0.009246826,0.032196045,-0.008636475,0.003932953,0.01651001,0.034179688,-0.020004272,-0.003282547,0.0007019043,-0.0011329651,-0.013366699,-0.011566162,0.019470215,-0.018127441,0.004673004,0.021438599,0.010253906,-0.041870117,0.01689148,-0.001080513,-0.023391724,-0.008636475,0.0146865845,-0.05908203,0.009407043,0.0055732727,-0.014335632,-0.031799316,0.02053833,0.006965637,-0.002319336,0.03201294,0.0102005005,0.011505127,0.0118255615,0.014190674,0.024917603,0.008987427,0.001750946,-0.006248474,0.00630188,0.036987305,-0.018005371,-0.0069007874,-0.03152466,0.006614685,0.032958984,-0.018127441,-0.018844604,0.008384705,-0.014335632,-0.013191223,0.00484848,0.038208008,0.0077934265,0.037872314,-0.014556885,-0.017868042,-0.0035076141,0.04699707,0.003036499,-0.01776123,-0.03024292,0.012573242,-0.026931763,0.042663574,0.05380249,-0.008331299,0.0063705444,0.0031318665,-0.027893066,-0.0023765564,-0.016448975,0.015182495,-0.027542114,0.0073165894,0.011642456,0.027832031,-0.019805908,-0.017532349,-0.0054969788,-0.030776978,-0.025268555,-0.0138549805,0.011047363,0.0061035156,0.03744507,0.012245178,0.030792236,-0.010803223,0.05706787,-0.008018494,0.06707764,0.007904053,-0.012924194,0.047698975,0.017410278,0.028259277,0.010940552,0.02748108,-0.019256592,-0.0015697479,0.014343262,0.015823364,0.014015198,0.002040863,-0.007537842,0.04373169,-0.025634766,0.02532959,-0.0051002502,-0.005504608,0.013328552,-0.011482239,-0.024749756,0.002363205,-0.005962372,-0.00642395,0.03778076,-0.0109939575,-0.012275696,-0.014884949,-0.019058228,0.023986816,-0.011123657,0.006000519,-0.010879517,-0.016952515,0.0146484375,-0.013626099,-0.021057129,-0.00069475174,0.017730713,-0.035583496,-0.009803772,0.0079956055,0.018112183,-0.019943237,0.041809082,0.03933716,-0.004966736,-0.001996994,0.04724121,-0.006362915,0.024368286,0.001449585,0.052093506,0.035736084,0.019638062,0.0053749084,0.02470398,0.028915405,-0.011009216,0.015396118,0.040100098,0.0048179626,0.017333984,-0.004173279,-0.0110321045,0.0053901672,-0.0051002502,-0.019851685,0.00032949448,-0.032043457,-0.00881958,0.0015926361,0.004333496,0.0029067993,0.013427734,-0.018737793,-0.016815186,0.01210022,0.037750244,0.022659302,-0.04425049,0.0022792816,0.0096206665,0.0051002502,-0.012313843,-0.024002075,0.01235199,-0.04260254,0.0048179626,0.023239136,-0.0019760132,0.0027618408,-0.020904541,-0.0047569275,0.055023193,0.017944336,0.0014448166,0.02230835,-0.01727295,0.018569946,0.0034236908,0.0052223206,-0.003435135,-0.020751953,-0.004272461,0.026626587,-0.012069702,-0.014671326,0.018722534,0.01260376,0.017700195,-0.001572609,0.016113281,0.021881104,-0.016830444,-0.0060691833,0.0082473755,0.018630981,-0.037261963,-0.038391113,-0.012199402,0.027114868,0.050445557,-0.013679504,-0.007484436,-0.023803711,0.024993896,0.030288696,0.037963867,0.004840851,0.04626465,0.012176514,0.0012302399,-0.017150879,0.007904053,0.0018892288,-0.010772705,0.018554688,-0.02456665,-0.01071167,-0.005168915,0.03378296,0.0027942657,-0.017150879,-0.0076446533,-0.010566711,-0.004737854,0.022323608,-0.022079468,0.019378662,-0.02508545,-0.013450623,0.022232056,0.0073623657,-0.025131226,-0.03753662,-0.010986328,-0.007637024,-0.07141113,0.012207031,-0.012924194,-0.002149582,-0.017578125,0.007522583,-0.011505127,0.016571045,0.0036201477,-0.0067634583,0.0029239655,0.021255493,0.011398315,-0.008682251,0.030395508,-0.022415161,-0.021408081,0.0020980835,-0.008926392,0.0057258606,0.030166626,-0.027755737,0.04425049,0.015136719,-0.009521484,0.0022850037,-0.018066406,-0.012207031,-0.0024700165,-0.033721924,-0.016433716,0.014823914,0.011039734,0.0019378662,0.003786087,0.042633057,-0.02645874,-0.022369385,0.035369873,0.05480957,-0.004802704,0.064819336,-0.026504517,0.003282547,-0.036071777,-0.0084991455,-0.0051498413,0.016403198,0.0059547424,0.008110046,0.0040893555,0.023803711,0.022094727,-0.014122009,-0.019485474,0.034576416,0.025390625,-0.0021820068,0.035888672,0.019958496,0.007221222,-0.02619934,-0.01600647,0.0037651062,0.034423828,0.021743774,0.0211792,-0.01838684,0.0101623535,-0.0038394928,0.0063819885,0.031204224,-0.028564453,-0.051452637,-0.007724762,-0.026657104,0.015411377,-0.0034866333,0.013412476,-0.013465881,0.0075187683,-0.038726807,-0.019683838,-0.025726318,0.019958496,0.019714355,-0.005290985,-0.0067214966,0.0037212372,-0.008621216,-0.026412964,0.000116467476,-0.049865723,-0.023880005,0.005252838,-0.007095337,0.023162842,0.010871887,-0.010597229,0.012420654,0.0051193237,-0.0050239563,0.0025520325,0.016784668,-0.0039405823,-0.0004377365,0.030227661,0.015777588,-0.00687027,-0.0035324097,-0.0074691772,-0.005329132,0.033599854,-0.0031223297,0.013214111,-0.0043792725,0.01890564,0.015792847,0.002735138,0.035461426,-0.019805908,0.028060913,-0.032318115,-0.009536743,0.0015573502,-0.016647339,0.026504517,-0.011604309,-0.02961731,-0.016082764,-0.0039138794,-0.0069351196,0.023239136,0.008255005,0.04714966,-0.0022010803,0.049194336,-0.02494812,-0.017715454,0.012626648,0.012207031,-0.020385742,-0.002937317,0.016662598,0.010734558,0.028808594,0.005718231,0.0072669983,-0.026504517,-0.015487671,-0.0037250519,-0.013427734,-0.011070251,-0.011329651,0.01940918,0.029937744,0.012214661,0.0072746277,0.031311035,0.015007019,0.029510498,0.0014476776,0.04928589,0.028137207,-0.021499634,0.012062073,0.007411957,-0.021697998,0.0006685257,-0.016098022,0.010848999,-0.03479004,-0.0030498505,-0.0116119385,0.031097412,-0.014305115,0.01158905,-0.008529663,-0.004184723,-0.05407715,-0.012825012,-0.046966553,0.0096206665,0.011512756,0.010620117,0.020065308,0.012046814,-0.022705078,0.006614685,0.027328491,-0.00007688999,-0.04574585,-0.019515991,-0.0015897751,0.0040397644,0.011108398,0.0077934265,-0.03186035,-0.01550293,0.0037117004,0.0039863586,-0.0032730103,-0.025222778,0.017562866,0.032592773,-0.0060539246,-0.025924683,0.026412964,0.01348114,-0.008491516,0.01084137,0.004547119,0.040405273,0.03543091,0.001663208,0.030776978,0.016403198,-0.02961731,0.0602417,-0.0053977966,0.02999878,-0.01878357,-0.022232056,-0.025802612,-0.016326904,0.005821228,-0.0054512024],"createdAt":"2026-04-18T18:41:46.979Z","updatedAt":"2026-04-29T01:33:26.950Z","lastSeenAt":"2026-04-29T01:33:26.950Z","tsv":"'/api/v1/accounts/200/balance':87 '0.02':73,125 '000':120 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '20':119 '300':145 '402':214 '6':130 'Base network API' 'USDC micropayment API' 'accept':88,205 'access':158 'account':4,18,42 'account balance API' 'account-balance' 'actual':199 'address':137 'advertis':149 'ai/ml':63 'amount':116 'analyt':62 'api':39,151,166 'balanc':5,19,43,197 'base':8,22,82,121,140 'base-network' 'bodi':237 'broader':50 'call':12,26 'caller':101 'challeng':215 'confirm':209 'connect':175 'content':181 'crypto payment API' 'data':61,66,228 'decim':131 'detail':192 'difficult':223 'doc':165 'document':160,220 'dozen':54 'endpoint':6,20,30,59,86,198,207 'exact':226 'exampl':189 'explan':193 'extrem':162 'finance/web3':65 'gate':3,17,58 'handl':96 'header':108 'howev':159 'includ':103 'infer':64 'inform':44 'infrastructur':68 'instant':157 'json':93 'json-response' 'key':152 'know':225 'lack':218 'limit':155 'live':210 'lowpaymentfee' 'lowpaymentfee.com':32 'make':221 'maximum':115 'must':102 'network':83 'no-api-key' 'offer':53 'openapi':185 'page':170 'paramet':203 'part':47 'pay':10,24,36 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request':35 'payment':94,107,112,133 'per':11,25,37,74 'platform':51,148 'post':89 'price':71,167 'prompt':177 'proof':113 'proper':213 'protocol':100 'provid':33 'rate':154 'readm':169 'render':172 'request':38,75,90,236 'request/response':188 'requir':117 'retriev':41 'return':92,200,211,230 'schema':186 'second':146 'sent':135 'settl':77 'sinc':127 'span':60 'spars':163 'specif':85 'structur':234 'substant':180 'timeout':143 'unit':122 'usd':126 'usdc':14,28,79,124,128 'usdc-settlement' 'use':129 'util':69 'valid':111 'via':97 'wallet':176 'x':106 'x-payment':105 'x402':2,16,57,99 'x402 API' 'x402-gated':1,15,56 'x402-payment'","prices":[{"id":"8fb0451b-e53f-40c9-9cf1-1d4b99ae3e57","listingId":"c8303eae-797e-4e70-bf2b-3e1f4c989ac3","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/200/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":"2026-04-18T18:41:46.979Z"}],"sources":[{"listingId":"c8303eae-797e-4e70-bf2b-3e1f4c989ac3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/200/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:46.979Z","lastSeenAt":"2026-04-29T01:33:26.950Z"}],"details":{"listingId":"c8303eae-797e-4e70-bf2b-3e1f4c989ac3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/200/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/200/balance"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/200/balance"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating pay-as-you-go balance lookups into agent workflows","Accessing financial data without API key registration"],"bestFor":["Agents or services that need on-demand account balance data without subscription commitments","Developers experimenting with x402 payment protocol integrations","Use cases requiring keyless, permissionless API access on Base"],"notFor":["Production systems requiring well-documented, schema-validated APIs","High-volume use cases where per-request pricing may add up versus bulk plans","Users who need detailed documentation or support before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.183Z"},"updatedAt":"2026-04-29T01:33:26.950Z"}}