{"id":"d84eaed4-3e8a-41c8-bbdc-4801ed4f721d","shortId":"9BV4U6","kind":"x402","title":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides account balance information via the x402 payment protocol. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/accounts/191/balance` is described as \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-request payment.\n\nDocumentation on the site is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples. The endpoint is confirmed live (returns HTTP 402 with a valid x402 challenge), but the actual data returned after payment is unknown. The platform lists many other endpoints at $0.02 each, but without documentation it is unclear what data any of them actually return or what input parameters they accept.","tags":[],"capabilities":["x402-payment","usdc-base","account-balance","pay-per-request","no-api-key"],"categories":["finance","data"],"synonyms":["account balance API","x402 micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","402 payment required"],"warnings":["No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No request or response schema provided; it is unknown what data this endpoint returns after payment","The endpoint path references a specific account ID (191), suggesting it may be a demo or placeholder","No OpenAPI or ai-plugin manifest discovered"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/191/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/191/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of this specific endpoint (account 191 balance) is opaque, and the broader site's docs pages are empty. This is 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":"2026-04-19T01:45:13.756Z","embedding":[-0.017166138,0.0039367676,0.04949951,0.009101868,0.013648987,-0.038269043,-0.003501892,0.021057129,0.07342529,-0.06439209,0.041992188,-0.05078125,-0.039733887,-0.026824951,-0.014526367,0.018447876,-0.028808594,0.021942139,-0.06604004,0.041809082,0.007904053,-0.017089844,-0.017608643,0.055633545,-0.0076293945,-0.030059814,0.0072517395,-0.029769897,-0.03829956,-0.042877197,0.034088135,-0.023071289,-0.0077285767,0.014289856,0.014579773,0.003440857,0.010978699,0.04232788,0.043182373,-0.010871887,-0.01083374,-0.045562744,0.0079574585,0.007633209,-0.03302002,-0.0051956177,0.021209717,-0.031585693,-0.0062026978,-0.011604309,-0.04714966,0.006454468,0.01260376,0.011375427,0.01826477,0.03225708,-0.0034389496,-0.024276733,0.0211792,0.02104187,0.0007901192,-0.04888916,-0.013381958,0.007385254,0.01737976,0.056243896,0.0066719055,0.045837402,-0.0021629333,0.051696777,0.019561768,0.056243896,0.028320312,0.0069274902,-0.0052452087,-0.02180481,0.008262634,0.039154053,-0.0038051605,-0.036468506,-0.011505127,-0.022888184,-0.082336426,-0.0031318665,-0.014030457,-0.04348755,-0.02305603,0.014411926,-0.023330688,0.048828125,-0.08227539,-0.009971619,0.011428833,0.02532959,0.0031719208,-0.02722168,-0.007785797,0.019256592,-0.0060195923,0.00075149536,0.004558563,-0.01940918,0.03564453,-0.013336182,0.048614502,0.04699707,0.014717102,0.014961243,-0.0062294006,-0.001373291,-0.010467529,-0.0027332306,-0.0074386597,-0.037750244,0.0141067505,0.010643005,-0.03112793,0.01020813,-0.026229858,0.016189575,-0.040618896,0.06951904,0.016479492,-0.0055618286,0.021575928,-0.056396484,-0.011756897,0.016403198,-0.028167725,0.0018987656,0.031921387,0.011146545,0.01537323,-0.012451172,-0.03390503,0.017044067,-0.019256592,-0.018508911,-0.034210205,-0.0031986237,0.02633667,-0.017486572,0.022720337,0.0075531006,-0.09631348,-0.006801605,-0.035949707,0.01852417,-0.034240723,-0.010292053,0.0049476624,0.019210815,-0.010253906,-0.0090789795,-0.018051147,-0.027755737,-0.0035114288,0.027755737,0.006122589,0.04534912,0.0038909912,0.029037476,0.029388428,0.0022659302,0.038391113,0.04147339,-0.02229309,-0.07086182,-0.077941895,-0.023803711,0.0056419373,-0.01890564,-0.024459839,-0.0054092407,-0.01828003,-0.07647705,-0.015975952,0.0010604858,-0.03439331,-0.025985718,0.00004965067,-0.023376465,0.0134887695,-0.0025482178,-0.053833008,-0.009307861,-0.0067367554,0.05041504,0.019119263,0.019836426,0.01828003,0.0027427673,0.047302246,0.038513184,-0.02027893,-0.023788452,0.01020813,-0.00749588,0.023162842,0.010231018,0.029541016,-0.033721924,0.02835083,0.053222656,-0.012390137,-0.022277832,0.027664185,-0.049102783,-0.051818848,-0.009429932,0.012008667,0.00730896,-0.011627197,0.008529663,-0.03479004,-0.017181396,0.0034732819,0.01222229,0.0206604,0.060302734,-0.007041931,0.009986877,0.011695862,0.014312744,-0.05343628,0.0362854,0.05380249,0.033111572,-0.0018348694,-0.024368286,0.012008667,0.014328003,-0.024902344,0.0017051697,-0.01234436,0.030944824,0.008522034,0.023895264,0.025100708,-0.012489319,-0.006793976,-0.024963379,0.0031414032,0.024169922,0.0140686035,-0.018051147,-0.042907715,-0.08258057,0.051971436,0.06463623,0.015823364,0.0064353943,-0.0018014908,-0.03567505,-0.02520752,-0.05709839,0.0395813,0.06341553,-0.014213562,-0.02798462,0.0317688,-0.01689148,-0.035339355,-0.025817871,-0.010147095,-0.024993896,-0.019088745,-0.0021038055,-0.06542969,0.009384155,0.0059280396,0.028121948,0.042236328,-0.0072898865,-0.0519104,-0.029922485,0.011787415,0.009475708,-0.032318115,0.009880066,-0.004878998,0.030029297,0.023025513,0.0037441254,0.01828003,-0.009849548,-0.009941101,0.0041542053,0.026992798,-0.0008969307,-0.029953003,0.024307251,0.008987427,-0.047454834,0.018249512,0.00484848,0.048553467,-0.040252686,0.032196045,-0.02204895,0.003660202,0.045532227,-0.0063171387,-0.052764893,0.023803711,0.002275467,0.051330566,0.062683105,0.020599365,-0.0027980804,-0.0051727295,0.06994629,-0.011421204,0.005092621,0.029922485,0.036132812,0.030029297,-0.000172019,-0.064941406,-0.053131104,0.0020198822,-0.02935791,0.029754639,-0.026367188,0.021469116,-0.008125305,0.026748657,-0.025482178,0.005519867,-0.042144775,-0.0070991516,-0.010871887,0.0008010864,-0.026367188,-0.016036987,0.02420044,0.012054443,-0.0079193115,-0.011756897,0.043273926,0.01651001,-0.02281189,-0.0029125214,-0.029800415,-0.019317627,-0.02192688,0.0256958,0.010925293,0.0093688965,0.020065308,-0.029541016,-0.00026845932,0.016296387,-0.0009121895,0.05041504,0.010627747,0.0049743652,-0.04849243,-0.05368042,-0.020126343,-0.042388916,0.016036987,0.016799927,-0.00630188,0.062286377,-0.007583618,-0.02027893,-0.02859497,0.030670166,-0.04425049,0.0012588501,0.03152466,-0.029800415,-0.02645874,-0.0068130493,0.008598328,0.01499939,0.021011353,0.019195557,0.017074585,0.082336426,0.050720215,0.014137268,0.012870789,0.03439331,0.017105103,-0.011512756,0.0016489029,-0.028320312,-0.011154175,0.03277588,-0.016845703,-0.024383545,-0.082336426,0.060760498,0.018859863,0.08288574,0.014274597,0.003396988,0.029342651,-0.01084137,0.030944824,-0.05557251,-0.0435791,-0.037109375,-0.040771484,0.023376465,-0.006416321,0.007972717,-0.03036499,0.030914307,0.013931274,0.025436401,-0.027328491,0.054870605,-0.014122009,-0.015670776,0.029037476,0.0121154785,0.044036865,0.034240723,-0.036621094,0.012130737,0.001958847,-0.029647827,-0.019470215,0.026382446,-0.0076141357,-0.026870728,-0.06719971,-0.024246216,0.01789856,-0.018508911,-0.061431885,-0.0036830902,0.0067863464,0.026901245,0.017288208,-0.016494751,-0.027664185,0.0058403015,-0.01600647,-0.07659912,-0.0068244934,-0.02003479,0.02166748,0.03137207,-0.03793335,0.023971558,0.0033836365,0.013381958,-0.0138549805,0.01713562,-0.007873535,0.0057258606,-0.024276733,0.030380249,0.012138367,0.02494812,0.014717102,0.053344727,0.02607727,0.0181427,0.04559326,0.0231781,0.0039405823,-0.051727295,0.015602112,-0.06958008,0.012672424,0.026184082,-0.031707764,0.009513855,-0.014350891,-0.026641846,-0.003326416,0.00819397,-0.019973755,0.005508423,0.033325195,-0.043151855,-0.036193848,-0.049194336,-0.022445679,0.003025055,0.062683105,0.013763428,-0.000033080578,-0.0413208,-0.012954712,0.01864624,0.008361816,0.0074424744,-0.013641357,-0.0069084167,-0.025512695,-0.007411957,-0.024551392,-0.004589081,0.03353882,0.0011520386,-0.0069732666,0.01576233,0.002571106,0.002544403,-0.015220642,0.005821228,0.022979736,-0.027679443,0.011528015,-0.017150879,0.026412964,-0.008354187,-0.03149414,-0.0569458,0.03390503,0.004459381,0.04486084,-0.038391113,0.006839752,0.003900528,0.018951416,0.011734009,-0.02558899,0.00072813034,0.0035076141,-0.02911377,-0.087646484,0.048919678,-0.023406982,0.025375366,0.004299164,-0.00907135,0.03527832,-0.014953613,0.016464233,0.021209717,-0.021575928,-0.014503479,-0.03137207,-0.02760315,-0.024475098,0.0038528442,-0.014976501,0.017288208,-0.020996094,0.0137786865,-0.009277344,-0.02420044,0.020462036,-0.0043296814,0.00089359283,0.022125244,0.0040130615,0.0032157898,0.045837402,0.020202637,-0.052825928,0.035339355,-0.0027599335,-0.0040130615,-0.016418457,0.049346924,0.01335907,-0.011016846,-0.0013618469,-0.012062073,-0.010322571,-0.027069092,-0.006839752,0.008041382,0.047332764,0.016494751,-0.046142578,0.011016846,0.019866943,-0.031921387,-0.012527466,0.022018433,0.022903442,-0.04763794,0.019348145,0.011993408,0.03933716,-0.027404785,0.0037765503,-0.000056624413,0.033355713,0.024368286,0.017608643,-0.002067566,0.017974854,-0.010124207,0.022018433,0.001625061,-0.03086853,-0.015304565,-0.0015230179,0.026565552,0.017700195,0.0010080338,0.0012512207,-0.019638062,-0.013893127,0.003358841,-0.016418457,0.026565552,0.01625061,0.014678955,-0.010215759,0.012374878,0.030181885,-0.042633057,-0.0056114197,0.001285553,0.044006348,-0.006454468,-0.012260437,0.027893066,0.012542725,0.033294678,-0.04031372,-0.02444458,0.0028495789,0.0026721954,-0.017852783,-0.064697266,-0.021499634,-0.008842468,0.021209717,-0.00579834,0.009544373,0.031066895,-0.0044288635,0.0012226105,0.0076522827,0.010688782,-0.019943237,0.0030097961,-0.053833008,-0.012809753,-0.016479492,-0.010856628,-0.027435303,0.016418457,-0.041015625,-0.023849487,0.0041885376,-0.022201538,0.0027122498,-0.008987427,0.0010795593,0.033996582,-0.020111084,0.0069770813,-0.009239197,-0.028396606,-0.008232117,0.0075569153,0.011642456,-0.050720215,0.014221191,-0.008911133,-0.001950264,-0.008903503,-0.007648468,0.019073486,0.0093688965,0.010475159,0.037994385,-0.051605225,0.028198242,-0.032318115,0.004299164,-0.010482788,-0.010284424,-0.00008034706,-0.021270752,-0.01008606,0.042022705,-0.0015802383,-0.008377075,-0.01889038,-0.030136108,-0.019989014,-0.049957275,0.02230835,0.014862061,0.044433594,-0.026687622,-0.008171082,0.026306152,0.01663208,-0.0038070679,-0.010353088,-0.0070152283,0.022750854,0.014808655,0.007194519,-0.034942627,-0.02142334,-0.02243042,0.0025043488,-0.04837036,-0.045013428,-0.009399414,0.02482605,0.015899658,-0.0138549805,-0.024505615,-0.024505615,-0.0035820007,-0.024719238,0.012237549,-0.01675415,0.021621704,0.0020008087,-0.012794495,0.0093688965,0.008140564,-0.029953003,0.034301758,0.015037537,-0.007926941,-0.025161743,-0.012016296,0.019195557,-0.00096797943,-0.0034637451,-0.030517578,-0.016937256,-0.019882202,-0.064819336,0.009994507,-0.0026226044,0.018218994,-0.0126571655,-0.00844574,-0.03668213,-0.015975952,-0.025512695,-0.01083374,0.0008587837,0.010070801,0.0074386597,0.021591187,0.0054740906,-0.0069770813,-0.012626648,-0.023223877,-0.002532959,0.00969696,-0.0053367615,0.021835327,0.04763794,-0.0037956238,-0.019897461,0.0012264252,-0.0022087097,0.019592285,-0.020553589,-0.006919861,-0.004436493,0.019363403,-0.010734558,-0.013023376,-0.036712646,0.0036296844,0.074523926,-0.006061554,-0.012428284,-0.015472412,-0.0049858093,0.02319336,0.040863037,-0.035491943,0.012145996,-0.033233643,0.028503418,-0.02684021,0.022705078,0.002544403,0.031097412,-0.017974854,-0.043273926,-0.007621765,0.038848877,-0.013763428,-0.070617676,-0.019943237,-0.07159424,-0.013183594,-0.026260376,-0.012374878,-0.001490593,0.0015115738,-0.032562256,-0.06817627,0.016281128,0.049621582,0.008201599,0.020095825,-0.003829956,0.011039734,0.015357971,-0.026184082,-0.018585205,0.019317627,-0.022354126,-0.015113831,-0.024475098,0.03253174,-0.012367249,-0.019500732,0.02633667,0.0038585663,0.012908936,-0.010566711,0.020126343,-0.014350891,-0.0015096664,-0.009208679,0.004398346,0.00016379356,-0.020355225,0.026153564,-0.055114746,0.023971558,0.0033931732,0.014846802,0.0041542053,0.015037537,0.031433105,-0.0446167,-0.008110046,0.0056495667,-0.0005264282,0.02104187,-0.011680603,0.05117798,0.021438599,-0.00983429,0.0067367554,-0.019302368,-0.0068969727,-0.039520264,-0.03744507,0.02998352,-0.0013008118,0.014183044,-0.011177063,-0.0019893646,0.013626099,0.0016231537,-0.0043525696,-0.011642456,0.00004082918,-0.02041626,0.020431519,-0.0005927086,0.028961182,0.0037956238,0.019348145,0.046142578,0.04611206,0.011985779,-0.0031986237,-0.004722595,0.02142334,-0.02507019,-0.004562378,0.013931274,0.026046753,0.006843567,0.01374054,0.022506714,-0.0357666,-0.03152466,-0.007850647,-0.02355957,0.01158905,-0.01965332,0.014770508,0.0010919571,0.010818481,-0.019500732,-0.031219482,-0.00605011,-0.027252197,-0.014144897,-0.0026779175,0.004951477,0.0076408386,0.01727295,-0.0062179565,0.004688263,0.002281189,0.027450562,-0.007461548,-0.011100769,0.023345947,0.049804688,0.010986328,-0.023498535,-0.0017576218,-0.010627747,-0.0074806213,0.0006508827,-0.0003941059,0.015457153,0.032073975,-0.015258789,0.02798462,-0.0063285828,0.04953003,-0.011734009,0.008628845,-0.00027108192,0.011222839,0.014144897,0.037719727,-0.03643799,0.0018177032,0.013183594,-0.021957397,-0.006462097,-0.018585205,-0.017456055,-0.00036263466,0.005706787,-0.009895325,0.022888184,0.017044067,0.02218628,-0.038726807,-0.016662598,0.0039405823,-0.043640137,-0.030715942,0.0055885315,-0.025512695,-0.010391235,0.010139465,-0.025375366,0.0023651123,-0.018981934,0.024749756,0.009292603,0.013679504,-0.007106781,-0.019607544,-0.022460938,-0.016357422,-0.0206604,0.018432617,-0.00969696,0.050567627,0.026824951,0.026672363,0.027908325,0.026748657,0.003353119,-0.045013428,-0.024520874,0.0135269165,-0.014823914,0.013076782,-0.02633667,0.055725098,0.05343628,0.0035209656,0.031585693,0.04095459,0.042236328,-0.009292603,0.007259369,-0.00881958,0.017669678,-0.019104004,0.022979736,-0.012237549,0.03363037,-0.027145386,0.023895264,-0.001663208,0.02659607,-0.030212402,0.024734497,0.0725708,0.017791748,-0.007575989,0.03237915,-0.016021729,-0.016082764,-0.0065345764,-0.023132324,0.054718018,0.009719849,0.031982422,0.034301758,0.008117676,-0.029266357,0.036987305,-0.007633209,-0.033966064,0.062927246,0.0069274902,-0.024871826,-0.000975132,-0.0005493164,0.014312744,-0.058258057,-0.019332886,0.033172607,-0.011886597,0.0056266785,-0.0044059753,0.0033683777,0.004600525,0.0077056885,0.0008239746,0.026748657,-0.019882202,0.0039482117,0.014083862,0.007873535,0.02128601,0.019165039,0.029769897,-0.025848389,-0.018569946,0.00014984608,0.024276733,0.012077332,-0.008934021,0.03640747,0.02468872,0.04159546,0.02911377,-0.020629883,0.002412796,0.032440186,0.0064926147,-0.0040016174,0.054901123,0.018341064,0.029830933,0.03741455,0.041625977,0.030303955,-0.026947021,0.015090942,0.00016367435,0.00016212463,-0.014328003,-0.00013840199,0.016586304,-0.016555786,0.026229858,-0.0025539398,0.0021839142,0.014328003,0.02961731,-0.01902771,-0.008987427,0.0063591003,0.0032539368,-0.0103302,0.00033020973,0.009223938,-0.022659302,0.01398468,0.016479492,0.018661499,-0.045166016,0.016174316,0.009361267,-0.022445679,-0.0007662773,0.017318726,-0.053222656,0.007965088,0.004776001,-0.019134521,-0.034088135,0.015777588,0.0118637085,-0.006416321,0.0317688,0.015296936,0.0070877075,0.0071868896,0.02116394,0.030288696,0.0051651,-0.0054016113,-0.009643555,0.006916046,0.03665161,-0.012825012,-0.00806427,-0.03265381,0.004184723,0.026901245,-0.018814087,-0.01360321,0.0008020401,-0.0042877197,-0.02293396,0.001572609,0.042053223,0.0031967163,0.03982544,-0.01461792,-0.015602112,0.008674622,0.041381836,0.0038909912,-0.01322937,-0.020568848,0.024749756,-0.023513794,0.0413208,0.052093506,-0.012794495,0.016433716,-0.000023961067,-0.018432617,-0.008102417,-0.021987915,0.02192688,-0.022949219,0.013069153,0.011482239,0.028244019,-0.02116394,-0.015991211,-0.0018205643,-0.03137207,-0.026748657,-0.018447876,0.011413574,-0.002532959,0.028549194,0.015090942,0.027404785,-0.013839722,0.063964844,-0.008712769,0.064453125,0.0027484894,-0.007423401,0.048919678,0.020767212,0.030441284,0.0126571655,0.022705078,-0.015586853,0.009437561,0.018859863,0.009223938,0.012863159,0.009544373,-0.004878998,0.04071045,-0.022399902,0.029418945,-0.0025291443,-0.0078048706,0.0062713623,-0.015602112,-0.019866943,0.0053215027,-0.011680603,-0.00003838539,0.046203613,-0.019042969,-0.009994507,-0.021911621,-0.014717102,0.026947021,-0.017044067,0.0040130615,-0.008010864,-0.017730713,0.014862061,-0.017684937,-0.016906738,0.011817932,0.018508911,-0.03955078,-0.022720337,0.006706238,0.022827148,-0.030715942,0.039093018,0.03286743,-0.0076789856,0.0012893677,0.058685303,-0.005455017,0.02178955,-0.00051164627,0.049926758,0.030792236,0.0053253174,-0.0028305054,0.013343811,0.023956299,-0.010032654,0.014579773,0.03857422,0.0057640076,0.012992859,-0.0015497208,-0.018356323,-0.00021922588,-0.00050878525,-0.028396606,-0.0076904297,-0.029525757,-0.0061302185,0.0031318665,0.010063171,-0.011413574,0.015419006,-0.009742737,-0.014083862,0.015319824,0.036254883,0.010871887,-0.04284668,-0.000746727,0.015029907,0.01600647,-0.025817871,-0.026535034,0.007003784,-0.047027588,0.008453369,0.026870728,-0.000060021877,0.0015907288,-0.02357483,0.00074625015,0.05505371,0.019699097,0.008987427,0.014251709,-0.013145447,0.021194458,-0.0053749084,0.005897522,0.0042266846,-0.011665344,-0.0005617142,0.0209198,-0.0079193115,-0.018127441,0.010848999,0.013381958,0.0099487305,0.0011062622,0.0068244934,0.025009155,-0.014732361,-0.0096588135,0.0078048706,0.017730713,-0.029541016,-0.03717041,-0.014480591,0.031707764,0.05319214,-0.013687134,-0.010002136,-0.020889282,0.029190063,0.022628784,0.03503418,0.0037975311,0.052734375,0.009895325,-0.0037956238,-0.015342712,0.019073486,-0.0004286766,-0.019943237,0.017410278,-0.0284729,-0.0027217865,-0.0060539246,0.014694214,0.0033168793,-0.017150879,-0.008888245,-0.021499634,-0.00655365,0.030639648,-0.023727417,0.017501831,-0.03503418,-0.018661499,0.02633667,-0.008766174,-0.024505615,-0.031402588,-0.010971069,-0.015419006,-0.060058594,0.008232117,-0.021133423,-0.0060691833,-0.014717102,0.0023460388,-0.01499176,0.024353027,0.0011119843,-0.002538681,0.005634308,0.024871826,0.010673523,-0.0068969727,0.039520264,-0.031204224,-0.022399902,-0.006629944,-0.010139465,0.0009160042,0.026489258,-0.021896362,0.039245605,0.014480591,-0.009742737,0.007850647,-0.01687622,-0.0073165894,-0.0026512146,-0.049621582,-0.030258179,0.014083862,0.014160156,-0.0025863647,-0.001455307,0.05227661,-0.024261475,-0.021774292,0.026290894,0.047058105,0.0023994446,0.057006836,-0.030761719,-0.002073288,-0.030532837,0.00894928,-0.009475708,0.012992859,0.00680542,0.001958847,0.0050468445,0.009391785,0.02494812,-0.019424438,-0.017318726,0.036102295,0.025054932,-0.004627228,0.041870117,0.014213562,0.00077295303,-0.019210815,-0.0023040771,0.0020771027,0.04248047,0.018981934,0.019592285,-0.025527954,0.020477295,-0.007297516,0.011909485,0.031219482,-0.03277588,-0.044555664,-0.012634277,-0.026138306,0.01828003,0.0011415482,0.013801575,-0.016647339,0.0043907166,-0.03756714,-0.02748108,-0.025680542,0.021484375,0.015258789,-0.0059547424,0.0031318665,0.003835678,-0.0062217712,-0.035095215,0.0007247925,-0.055023193,-0.028213501,-0.015182495,-0.009391785,0.024154663,0.009338379,-0.013534546,0.0110321045,0.005302429,-0.005168915,0.010055542,0.024307251,-0.0103302,-0.003944397,0.024917603,0.009963989,-0.013679504,-0.000895977,-0.010482788,-0.0055389404,0.0317688,-0.0025672913,0.005592346,-0.010047913,0.013908386,0.009017944,0.0043640137,0.02897644,-0.013793945,0.023117065,-0.026824951,-0.017547607,0.0016555786,-0.017059326,0.029342651,-0.0031967163,-0.027282715,-0.019592285,-0.009605408,-0.021820068,0.0129470825,0.0026683807,0.03479004,-0.0047721863,0.045928955,-0.02645874,-0.018936157,0.018157959,0.0075263977,-0.020431519,0.0013828278,0.022628784,0.004535675,0.021743774,-0.003320694,0.0038166046,-0.031402588,-0.006614685,-0.0032691956,-0.0138549805,-0.014137268,0.0008254051,0.01626587,0.0262146,0.0016021729,0.0071487427,0.025512695,0.013053894,0.039031982,0.005935669,0.044830322,0.02166748,-0.030792236,0.015380859,0.007358551,-0.026260376,0.0067481995,-0.01689148,0.018539429,-0.028137207,-0.0076789856,-0.011962891,0.03765869,-0.016418457,0.016326904,-0.007835388,-0.0066871643,-0.054260254,-0.005168915,-0.052459717,0.0044822693,0.013114929,0.012176514,0.019515991,0.01210022,-0.035217285,0.009986877,0.027740479,-0.006198883,-0.036956787,-0.018539429,-0.000031113625,0.005844116,0.009094238,0.02116394,-0.029190063,-0.022842407,-0.005569458,0.009132385,-0.0031261444,-0.028320312,0.023468018,0.029342651,-0.011741638,-0.015930176,0.01966858,0.018859863,-0.0038585663,0.0023918152,0.005569458,0.035491943,0.041900635,-0.006504059,0.028671265,0.022460938,-0.031097412,0.06072998,-0.0058250427,0.025161743,-0.020050049,-0.014579773,-0.023086548,-0.019165039,0.003835678,0.005306244],"createdAt":"2026-04-18T18:41:38.556Z","updatedAt":"2026-04-29T02:04:46.687Z","lastSeenAt":"2026-04-29T02:04:46.687Z","tsv":"'/api/v1/accounts/191/balance':84 '0.02':10,24,114,217 '000':104 '0x8335':109 '20':103 '300':131 '402':195 '402 payment required' '6':119 'Base network API' 'USDC pay-per-call' 'accept':92,237 'access':90,142 'account':4,18,34 'account balance API' 'account-balance' 'actual':203,230 'advertis':98,141 'ai/ml':62 'analyt':61 'api':58,89,135,160 'balanc':5,19,35 'base':8,22,79,105,111 'behind':71 'broader':47 'call':57 'challeng':97,200 'confirm':191 'connect':169 'content':175 'cost':101 'crypto payment API' 'data':60,65,204,226 'decim':120 'describ':86 'doc':159 'document':151,221 'endpoint':6,20,30,83,189,215 'equal':113 'exact':127 'exampl':187 'extrem':156 'finance/web3':64 'gate':3,17,70 'grant':144 'http':194 'infer':63 'inform':36 'infrastructur':67 'input':234 'key':136 'limit':139 'list':212 'live':192 'lowpaymentfee' 'lowpaymentfee.com':32 'made':123 'mani':213 'maximum':100 'micropay':73 'network':80 'no-api-key' 'offer':50 'openapi':179 'page':164 'paramet':235 'part':44 'pay':9,23,55 'pay-per-cal':54 'pay-per-request' 'payment':40,121,150,207 'per':11,25,56,115,148 'per-request':147 'platform':48,211 'post':93 'premium':88 'price':161 'prompt':171 'protocol':41 'provid':33 'pure':145 'rate':138 'readm':163 'render':166 'request':12,26,94,116,149 'request/response':182 'return':193,205,231 'schema':183 'scheme':128 'second':132 'settl':74 'site':154 'span':59 'spec':180 'specif':82 'substant':174 'thin':157 'timeout':133 'unclear':224 'unit':106 'unknown':209 'usag':186 'usdc':14,28,76,108,117 'usdc-base' 'use':118 'util':68 'valid':198 'varieti':52 'via':37,124 'wallet':170 'without':220 'x402':2,16,39,72,96,126,199 'x402 micropayment API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"684e253b-827d-4c89-894d-9cb671f36c47","listingId":"d84eaed4-3e8a-41c8-bbdc-4801ed4f721d","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/191/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":"2026-04-18T18:41:38.556Z"}],"sources":[{"listingId":"d84eaed4-3e8a-41c8-bbdc-4801ed4f721d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/191/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:38.556Z","lastSeenAt":"2026-04-29T02:04:46.687Z"}],"details":{"listingId":"d84eaed4-3e8a-41c8-bbdc-4801ed4f721d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/191/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 HTTP 402 with a valid x402 challenge advertising USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/191/balance"},{"claim":"Maximum amount required is 20000 base units of USDC (6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/accounts/191/balance"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating pay-per-call balance checks into agent workflows","Accessing financial data without API key registration"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","Agents that can settle x402 payments in USDC on Base","Prototyping micropayment-gated API integrations"],"notFor":["Users needing detailed API documentation or response schemas before integrating","High-volume use cases where per-request pricing may add up without bulk discounts","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.553Z"},"updatedAt":"2026-04-29T02:04:46.687Z"}}