{"id":"265ce2b6-3198-415b-952f-9a39f65e3ce0","shortId":"SLdey3","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/cards/90` is listed as \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is handled via the x402 exact scheme — callers attach an X-PAYMENT header with a signed payment to the payTo address, and the server fulfills the request upon verification.\n\nThe broader platform advertises four categories of APIs: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nNote that the specific endpoint `/api/v1/cards/90` does not clearly map to any of the documented API categories on the landing page. Its actual functionality is unknown — the description simply says \"Premium API Access\" with no further detail. Documentation pages (/docs, /pricing, /README) returned only a wallet-connect prompt with no substantive content, so the actual request/response schemas and behavior of this endpoint remain unverified.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","json-response","post-method","no-api-key"],"categories":["api-marketplace","misc"],"synonyms":["low payment fee","x402 api","micropayment api","pay-per-request api","base network api","usdc api access","402 payment api"],"warnings":["The endpoint path /api/v1/cards/90 does not match any of the documented API routes on the landing page — its actual functionality is unclear.","All documentation pages (/docs, /pricing, /README, /api) returned no substantive content, only a wallet-connect prompt.","No request or response schema is available; callers cannot know what to send or what to expect back.","The platform lists many API categories but none appear to relate to 'cards' — this may be a test or placeholder endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/90","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/cards/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), but there is no documentation, no request/response schema, and the specific endpoint '/api/v1/cards/90' does not correspond to any documented API on the landing page. All doc/pricing/README pages are empty beyond a wallet-connect prompt. The actual functionality of this endpoint is unknown.","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":"2026-04-19T03:03:47.586Z","embedding":[-0.032836914,-0.030929565,0.031188965,0.020492554,0.0211792,-0.026733398,-0.037841797,0.03164673,0.07537842,-0.05987549,0.02909851,-0.072387695,-0.0357666,-0.018066406,-0.034362793,0.006652832,-0.01423645,0.000831604,-0.035949707,0.04208374,0.028137207,-0.014289856,-0.021850586,0.03164673,0.0034942627,-0.010543823,0.014709473,0.011146545,0.0024356842,-0.042938232,0.042541504,-0.026153564,-0.009719849,0.016937256,-0.018600464,-0.030563354,-0.0051956177,0.02999878,0.037719727,-0.02027893,0.00091934204,-0.05026245,0.0138168335,-0.009223938,-0.050323486,-0.0027618408,0.02432251,-0.03237915,-0.013633728,-0.0015058517,-0.037994385,-0.012893677,-0.021057129,0.025680542,0.009902954,0.01576233,-0.021331787,-0.022766113,0.018997192,0.024429321,-0.016845703,-0.04724121,0.0044059753,0.0009069443,0.0011396408,0.043701172,-0.02319336,0.03378296,0.011764526,0.07861328,0.039520264,0.03466797,0.027023315,0.0050964355,0.01838684,-0.01134491,-0.025970459,0.059783936,-0.022415161,-0.012046814,-0.015609741,0.011497498,-0.051696777,-0.018157959,-0.023452759,-0.068359375,0.0026741028,0.00333786,-0.023971558,0.034576416,-0.08355713,-0.011642456,-0.034851074,-0.009513855,-0.0050315857,0.0035514832,-0.021026611,0.008354187,0.0076141357,0.018447876,0.0058403015,-0.048736572,0.030303955,0.014549255,0.045013428,0.025924683,-0.002002716,0.033447266,-0.0035514832,-0.029037476,-0.02267456,0.0037193298,-0.033935547,0.0034255981,0.023361206,0.021514893,-0.005844116,0.025726318,-0.042297363,0.016189575,-0.051696777,0.043304443,0.029785156,-0.015449524,0.011039734,-0.030838013,-0.007820129,0.005092621,-0.025344849,-0.019821167,0.029159546,0.0003607273,0.037750244,-0.025848389,-0.031341553,0.002603531,-0.008415222,-0.033111572,-0.05239868,-0.024108887,0.043426514,-0.028015137,0.03213501,0.020904541,-0.09020996,0.006729126,-0.03866577,0.010643005,-0.045959473,-0.004802704,0.0044021606,0.01411438,-0.0231781,-0.031707764,-0.01171875,-0.049316406,-0.0076408386,0.039489746,-0.0068740845,0.030212402,-0.021652222,0.011932373,0.011672974,-0.0020561218,0.015777588,0.030456543,-0.012107849,-0.08483887,-0.08355713,-0.030410767,-0.020751953,-0.0037403107,-0.047454834,-0.001786232,-0.0231781,-0.07470703,-0.027252197,-0.024459839,-0.014930725,-0.039245605,-0.015449524,-0.030563354,0.006088257,-0.016860962,-0.058685303,0.0024280548,-0.042816162,0.04916382,0.01828003,0.00945282,0.0256958,0.0068130493,0.07147217,0.022979736,-0.0061798096,-0.026153564,0.020217896,-0.017852783,0.032714844,0.009391785,0.015899658,-0.039245605,0.04248047,0.0715332,0.0045928955,-0.023788452,0.0030670166,-0.04840088,-0.034973145,-0.015136719,0.008422852,-0.0021514893,-0.030929565,0.028640747,-0.031951904,-0.037200928,0.002161026,0.014892578,0.023529053,0.076416016,0.007637024,0.013847351,0.013900757,0.02229309,-0.05392456,0.037261963,0.025436401,0.016296387,-0.02659607,-0.034118652,0.026504517,0.054748535,-0.023254395,0.00096035004,-0.028549194,0.019821167,0.0052871704,-0.0068855286,0.02394104,-0.004611969,-0.020004272,-0.033416748,-0.014373779,0.017623901,-0.000667572,-0.044799805,-0.03515625,-0.075683594,0.0463562,0.03414917,0.03765869,-0.010147095,-0.01701355,-0.01638794,-0.0049552917,-0.060546875,0.029067993,0.08087158,0.0038795471,-0.014320374,0.03793335,0.017501831,-0.028961182,-0.0018358231,-0.008163452,-0.025756836,-0.021331787,0.022476196,-0.032958984,0.008270264,0.021255493,0.033111572,0.033233643,-0.02217102,-0.02671814,-0.02331543,-0.015205383,-0.0010480881,-0.026977539,0.007965088,0.012123108,0.0107803345,0.0395813,0.016159058,0.015533447,-0.012069702,0.016220093,-0.0070152283,0.0027103424,-0.021881104,-0.035339355,0.010414124,0.005207062,-0.0625,0.0138168335,-0.007472992,0.06185913,-0.047027588,0.03668213,-0.023040771,0.040771484,0.026031494,-0.016799927,-0.029647827,-0.0002758503,0.025390625,0.050231934,0.03744507,-0.0033779144,-0.011154175,-0.01651001,0.050811768,-0.007873535,-0.008590698,-0.011436462,0.026870728,0.02368164,-0.009429932,-0.0289917,-0.038024902,-0.010643005,-0.01612854,0.01512146,-0.041778564,0.040924072,-0.016693115,0.0017032623,-0.018173218,0.0006275177,-0.05178833,0.017623901,-0.007701874,0.004951477,-0.011444092,-0.03387451,0.008522034,-0.0007586479,-0.012168884,-0.015686035,0.031188965,0.022705078,-0.014587402,-0.04458618,-0.007904053,-0.022567749,-0.012123108,0.019897461,0.017211914,0.029891968,0.024291992,-0.035705566,-0.003993988,0.021438599,0.010826111,0.012481689,-0.012123108,0.0021457672,-0.05065918,-0.044158936,-0.019515991,-0.015083313,0.002632141,-0.0025863647,0.007987976,0.05807495,0.007965088,-0.03161621,-0.03994751,0.02180481,-0.05392456,-0.0028953552,0.030349731,-0.02029419,-0.04626465,0.015449524,-0.011222839,-0.0004439354,0.06021118,0.015655518,0.002746582,0.07366943,0.026565552,0.020523071,0.023895264,0.023132324,0.028778076,0.0018987656,-0.025619507,-0.030700684,-0.008583069,0.021194458,-0.034423828,-0.04107666,-0.0758667,0.041809082,0.049468994,0.08148193,0.017333984,0.0031909943,0.035980225,-0.02267456,0.020446777,-0.019744873,-0.020217896,-0.033233643,-0.030807495,0.03829956,-0.008460999,-0.0076293945,-0.022399902,0.035949707,-0.0009536743,0.014442444,-0.015914917,0.055267334,-0.024597168,-0.008346558,-0.001115799,0.0017604828,0.045410156,0.059020996,-0.062286377,0.02154541,0.025863647,-0.017944336,-0.010345459,0.04559326,-0.017562866,-0.026229858,-0.06866455,-0.033477783,-0.008613586,-0.0001885891,-0.058624268,0.026107788,0.008262634,0.030456543,0.0034217834,-0.010658264,-0.005569458,0.0005722046,-0.01687622,-0.052825928,0.0014390945,-0.036956787,-0.0042037964,0.037322998,-0.030212402,-0.0023593903,-0.0046806335,-0.014221191,0.00092220306,0.009269714,0.021621704,-0.0013055801,-0.056243896,0.03729248,0.014984131,0.0017881393,0.023544312,0.03161621,0.021865845,0.0027618408,0.051940918,0.019165039,-0.01625061,-0.03552246,0.023864746,-0.034240723,-0.017242432,0.0032215118,-0.012161255,0.01071167,-0.020462036,-0.028030396,-0.026321411,0.015380859,-0.019760132,0.0072250366,0.03552246,-0.038269043,-0.039611816,-0.06530762,-0.020492554,0.016647339,0.088134766,0.0062332153,-0.008987427,-0.0569458,-0.0055122375,0.016326904,0.008041382,0.03466797,-0.015945435,-0.013710022,-0.0044822693,-0.03668213,-0.021728516,-0.023880005,0.03604126,-0.0025863647,-0.0065345764,0.017700195,0.0071640015,0.0034675598,-0.007724762,0.0031738281,0.018478394,-0.020263672,0.0007534027,-0.033203125,0.020095825,0.0022945404,-0.009117126,-0.035308838,0.05166626,0.00028419495,0.047698975,-0.0446167,-0.0016794205,-0.0127334595,0.017715454,0.033447266,-0.010810852,-0.008071899,0.0033817291,-0.040100098,-0.06652832,0.021102905,-0.022064209,0.014411926,-0.0012302399,0.009086609,0.04434204,-0.01222229,0.0105896,0.019836426,-0.036712646,-0.008575439,-0.039031982,-0.023956299,-0.034942627,0.006412506,-0.034423828,0.021072388,-0.017211914,0.009475708,-0.014579773,-0.02168274,0.03375244,0.015808105,-0.006843567,0.021759033,0.0085372925,0.013671875,0.044067383,0.013343811,-0.037994385,0.008926392,-0.0060157776,0.009277344,0.00014972687,0.035308838,0.041503906,-0.029663086,-0.002708435,-0.0058288574,-0.015533447,-0.007293701,-0.02394104,0.01737976,0.01864624,0.0063438416,-0.01473999,0.020141602,0.01725769,-0.020004272,-0.025787354,0.017120361,0.027191162,-0.042144775,0.027191162,0.028778076,0.057281494,-0.037628174,0.015434265,0.0003619194,0.0395813,0.021987915,-0.0044937134,-0.01991272,0.022735596,-0.03488159,0.008163452,-0.0056381226,-0.0037231445,0.021987915,0.015213013,0.01789856,0.031066895,0.026901245,-0.029449463,-0.032226562,0.007843018,-0.009231567,-0.022064209,0.028335571,0.028900146,0.015106201,-0.020095825,0.042297363,0.030975342,-0.02609253,-0.01020813,-0.020202637,0.041107178,-0.010131836,-0.012229919,0.018447876,-0.0027236938,0.016830444,-0.064086914,0.0028934479,0.006187439,0.003824234,-0.014587402,-0.044799805,-0.04449463,0.0056648254,0.020339966,0.014152527,0.016448975,0.02104187,0.011642456,-0.00014162064,0.029373169,-0.0007171631,0.0017118454,0.002571106,-0.048187256,-0.032165527,-0.011741638,0.000093996525,-0.01939392,0.009643555,-0.013885498,-0.031463623,-0.004070282,-0.01550293,0.002243042,-0.005859375,0.005126953,0.032409668,-0.0070152283,0.017822266,-0.019210815,-0.024276733,0.0036582947,-0.0033435822,0.029754639,-0.033081055,0.02633667,-0.010925293,-0.012481689,0.0072135925,0.030029297,0.024597168,0.03543091,0.0010881424,0.030212402,-0.03930664,0.04159546,-0.039093018,0.014389038,0.0060806274,-0.022918701,-0.013687134,-0.023162842,-0.01612854,0.030548096,-0.011421204,0.002363205,-0.02558899,-0.024841309,-0.0014162064,-0.056030273,0.021713257,0.021591187,0.04171753,-0.039215088,0.011291504,0.02734375,0.015930176,-0.02861023,0.0010166168,0.0011396408,0.0060806274,0.02267456,-0.004020691,-0.025466919,-0.016281128,0.003982544,0.012489319,-0.05645752,-0.041625977,-0.012023926,0.017654419,0.013145447,-0.018249512,-0.01234436,-0.02268982,-0.006526947,-0.027862549,0.02217102,-0.0029296875,0.022842407,0.014724731,-0.034698486,0.008880615,0.028305054,-0.026123047,0.044555664,-0.007507324,-0.012481689,-0.0524292,0.005508423,0.014305115,0.01727295,0.0038661957,-0.026916504,0.0019226074,-0.026824951,-0.051849365,-0.0051574707,-0.017822266,0.0037021637,-0.006958008,-0.013961792,-0.06109619,-0.0040779114,-0.013053894,0.015991211,0.018814087,0.0008158684,0.0013847351,0.006565094,0.0066719055,-0.027404785,-0.019989014,-0.01876831,0.012863159,0.012207031,0.015403748,0.0128479,0.028961182,-0.0010175705,-0.016464233,0.010772705,-0.007511139,0.03289795,-0.019515991,0.01374054,-0.017593384,0.012184143,-0.00053691864,-0.014511108,-0.029785156,-0.0028934479,0.06298828,0.0059394836,0.010551453,0.006980896,-0.0072402954,0.013061523,0.04208374,-0.038726807,0.0058898926,-0.027359009,0.029067993,-0.0031585693,0.0050964355,0.0009536743,0.018692017,-0.019744873,-0.04559326,0.0025482178,0.0158844,-0.0034942627,-0.054382324,-0.026504517,-0.05834961,0.0011663437,-0.015701294,-0.028793335,-0.008262634,-0.0029830933,-0.003616333,-0.07714844,0.003818512,0.05117798,0.017532349,0.019134521,-0.0110321045,0.025039673,0.030181885,-0.022781372,-0.015052795,0.020706177,-0.023040771,-0.017150879,-0.027877808,0.03286743,-0.014274597,-0.019989014,0.023666382,0.025039673,0.032684326,0.00014412403,0.0096206665,-0.020523071,0.014793396,-0.001001358,0.018325806,-0.0020389557,-0.010314941,0.036712646,-0.045440674,0.040771484,0.0062332153,-0.0124435425,0.008613586,0.02154541,0.0496521,-0.033721924,-0.019165039,0.03564453,0.009628296,0.0390625,-0.025482178,0.04989624,0.016281128,-0.014289856,0.005970001,0.0010900497,-0.017089844,-0.039886475,-0.024215698,0.027633667,-0.00548172,0.014305115,-0.011749268,-0.014533997,0.008735657,-0.009117126,0.014099121,-0.022949219,-0.0049705505,-0.023376465,0.014045715,0.023803711,-0.008956909,0.0076293945,0.02268982,0.018096924,0.035217285,-0.00024533272,-0.010055542,0.013183594,0.030044556,-0.0035820007,0.00023758411,0.011398315,0.010169983,0.016586304,0.034423828,0.019241333,-0.034118652,-0.012672424,-0.024398804,-0.020904541,-0.013076782,-0.0068130493,-0.0025577545,-0.010612488,0.021911621,-0.0085372925,-0.04916382,-0.005748749,-0.031799316,-0.035736084,0.0079193115,-0.02645874,0.023086548,0.012954712,0.013710022,0.018096924,-0.0051879883,0.048309326,-0.001581192,0.005443573,0.03439331,0.02659607,0.017944336,-0.029449463,-0.0104522705,-0.010650635,-0.013679504,0.009803772,-0.017791748,0.0009622574,0.03744507,-0.016601562,0.00086927414,-0.0025177002,0.025161743,0.007858276,0.008270264,-0.0061416626,0.010398865,-0.02178955,0.033935547,-0.048797607,0.017852783,0.021713257,0.017547607,0.01374054,-0.017715454,-0.022705078,0.015159607,-0.0043678284,-0.014259338,0.04852295,0.0038547516,0.02923584,-0.0137786865,-0.03555298,0.0013723373,-0.013038635,-0.020065308,0.03604126,-0.009544373,0.010276794,-0.0016803741,-0.03729248,0.038909912,-0.03366089,0.0035514832,0.0082473755,-0.0039520264,-0.0034828186,-0.013908386,-0.01158905,-0.0037727356,-0.0074501038,-0.008705139,-0.00027799606,0.04510498,0.03491211,0.02709961,0.030761719,0.005531311,0.0059928894,-0.026000977,-0.022872925,-0.0013818741,-0.028121948,0.019180298,-0.02456665,0.055480957,0.04244995,0.011634827,0.042266846,0.02999878,0.025741577,-0.0121154785,0.011787415,-0.024673462,0.02418518,-0.021362305,0.017791748,0.0074043274,0.036102295,-0.032592773,0.014564514,-0.01386261,0.010543823,-0.029922485,0.024490356,0.07733154,0.019577026,0.00056505203,0.017608643,-0.008277893,-0.0032081604,-0.0058898926,-0.016921997,0.062683105,0.01626587,0.042816162,0.04534912,0.018325806,0.0024662018,0.013519287,-0.03125,-0.017242432,0.0552063,0.032440186,-0.039001465,-0.0069732666,-0.015380859,0.0029144287,-0.053955078,-0.023513794,0.013343811,0.0064964294,0.008903503,-0.011207581,-0.009811401,-0.011528015,0.009849548,0.013183594,0.0005021095,-0.0040245056,0.014343262,0.025283813,-0.007858276,0.021972656,-0.0062026978,0.028686523,-0.0256958,-0.024520874,0.010818481,0.0135269165,-0.006095886,0.013473511,0.030380249,0.007843018,0.027114868,0.0340271,-0.020339966,-0.0022354126,0.02571106,0.00573349,-0.0017538071,0.047973633,0.039764404,0.015625,0.037994385,0.039764404,0.030456543,-0.027328491,0.014778137,-0.012619019,0.00831604,-0.013313293,-0.01007843,0.014198303,-0.0060272217,0.014129639,0.015777588,-0.013801575,0.025405884,0.020004272,0.004699707,-0.0047683716,-0.0044136047,0.025436401,-0.0072250366,0.010261536,-0.006023407,-0.0065956116,0.03161621,0.011054993,0.02330017,-0.020690918,0.026657104,0.013069153,-0.029129028,-0.012016296,0.0096206665,-0.036224365,0.008720398,-0.017364502,-0.009361267,-0.048217773,0.010757446,0.014862061,0.0074653625,0.030685425,0.008239746,-0.015838623,-0.008338928,0.027511597,0.018600464,-0.014427185,-0.017959595,-0.021911621,0.039916992,0.043029785,0.0049362183,0.0022945404,-0.009384155,0.0023403168,0.018661499,-0.0017490387,0.006515503,0.013145447,0.0023899078,-0.036071777,0.015419006,0.018081665,0.028900146,0.03668213,-0.022125244,-0.009468079,-0.0063056946,0.034301758,0.012023926,0.0043182373,-0.0076408386,0.026657104,-0.009757996,0.051818848,0.037384033,0.004600525,0.016708374,-0.019226074,0.004737854,0.00080537796,-0.012878418,0.015281677,-0.026351929,0.009223938,-0.00605011,0.035369873,-0.018478394,-0.0501709,0.006549835,0.0014266968,-0.01626587,-0.020431519,0.0124435425,-0.0096588135,0.020385742,0.030944824,0.020141602,-0.031463623,0.0690918,-0.013885498,0.04788208,-0.012336731,-0.02381897,0.054840088,0.033325195,0.039245605,0.005256653,0.013114929,-0.02281189,0.011276245,0.0423584,0.014411926,-0.000872612,-0.0014572144,-0.018554688,0.04248047,-0.010688782,0.03677368,-0.009468079,-0.0049324036,0.004436493,-0.010307312,-0.0051727295,-0.0059432983,0.0048675537,0.024505615,0.046325684,-0.027755737,-0.0070991516,-0.021636963,-0.022613525,0.022460938,-0.015151978,0.011230469,-0.0030612946,-0.025741577,0.01802063,-0.03314209,-0.01524353,0.011634827,0.030807495,-0.047607422,-0.020874023,-0.0048217773,0.022460938,-0.039489746,0.029449463,0.013900757,-0.0036640167,0.017715454,0.03805542,-0.0033035278,0.03665161,-0.00299263,0.033569336,0.04925537,-0.0035324097,-0.004348755,-0.0032749176,0.011367798,-0.010063171,0.009559631,0.030136108,-0.0067634583,0.010116577,-0.0028686523,-0.00484848,-0.0073165894,0.01776123,-0.008270264,0.004055023,-0.0029678345,-0.010292053,0.005077362,0.003080368,-0.0016870499,-0.0028095245,0.0140686035,-0.008872986,0.0021514893,0.02961731,0.020965576,-0.039245605,-0.010246277,0.02532959,0.011604309,-0.016448975,-0.021987915,-0.01940918,-0.034942627,0.0049819946,0.019989014,0.022232056,0.006713867,-0.030548096,0.0044021606,0.019042969,0.015670776,0.02482605,0.0037059784,-0.025390625,0.0006313324,-0.013687134,0.00573349,-0.0075950623,-0.0082092285,0.014564514,0.03201294,-0.006011963,-0.025268555,0.027374268,-0.0013427734,0.009506226,-0.0006890297,-0.0060272217,0.021621704,-0.014205933,-0.016784668,0.008605957,0.008872986,-0.0025577545,-0.024307251,-0.02381897,0.032226562,0.050689697,-0.0115356445,0.0018081665,0.009490967,0.011207581,0.036499023,0.037017822,0.009666443,0.027770996,0.018417358,-0.0022621155,-0.024276733,0.029785156,-0.012626648,-0.026184082,0.0124053955,-0.008262634,-0.039520264,0.024230957,0.00025725365,0.0022792816,-0.014808655,-0.020095825,-0.0061416626,-0.012908936,0.02633667,-0.0039520264,0.009307861,-0.04071045,-0.021453857,0.018127441,-0.013511658,-0.04434204,-0.020614624,-0.00819397,-0.014137268,-0.057373047,0.004257202,-0.021316528,0.0064086914,-0.012260437,0.009941101,0.010055542,0.036956787,-0.006828308,0.004673004,-0.008804321,0.044067383,0.0124435425,0.020629883,0.01612854,-0.014343262,-0.023406982,-0.01184845,-0.007457733,-0.0047416687,0.011459351,-0.0129776,0.04232788,0.02671814,-0.024887085,-0.0018796921,-0.0063056946,-0.007041931,-0.005832672,-0.033569336,-0.02923584,0.011413574,0.02748108,-0.015686035,-0.005470276,0.04284668,-0.017044067,-0.014778137,0.03137207,0.031433105,0.0014448166,0.037384033,-0.0105896,-0.011184692,-0.013542175,0.0051002502,-0.006111145,0.012863159,0.011260986,0.011665344,0.012573242,0.013839722,0.017623901,-0.011405945,-0.0013561249,0.018478394,0.027877808,-0.009468079,0.03375244,0.012916565,-0.009506226,-0.011245728,-0.012893677,0.029174805,0.060760498,0.012451172,0.002105713,-0.0044021606,0.007282257,-0.0033874512,-0.0016403198,0.015312195,-0.020202637,-0.044891357,-0.013626099,-0.015686035,0.02748108,-0.0060043335,0.01701355,0.002166748,0.017623901,-0.0060539246,-0.02230835,-0.015586853,0.029129028,-0.0019893646,-0.02229309,-0.014427185,0.019561768,0.02619934,-0.03189087,0.0026378632,-0.04220581,-0.027664185,-0.012275696,-0.02368164,0.017486572,0.0027770996,0.003932953,0.008514404,-0.0058784485,-0.0034103394,0.007472992,0.021392822,-0.015686035,-0.003692627,0.014007568,0.014633179,-0.0072746277,0.017089844,0.00920105,-0.0053634644,0.0053863525,-0.0082473755,0.016967773,-0.02444458,0.03515625,0.005531311,-0.004310608,0.029022217,0.00422287,0.014221191,-0.008659363,-0.005584717,0.0005893707,-0.0012598038,0.041046143,-0.022537231,-0.022491455,0.009651184,-0.023406982,-0.044891357,0.0072669983,0.02192688,0.025436401,-0.03086853,0.049926758,-0.005130768,0.0012645721,0.025680542,0.011817932,-0.012046814,-0.007259369,0.020523071,-0.0019950867,0.0058135986,-0.0070152283,-0.020629883,-0.027786255,-0.024307251,0.015823364,-0.004837036,-0.021987915,0.021514893,0.019882202,0.044525146,-0.009468079,0.024307251,0.028518677,-0.003944397,0.031219482,0.010131836,0.046813965,0.00198555,-0.035308838,-0.0000910759,-0.002998352,-0.014915466,0.0036754608,0.0012626648,0.013557434,-0.028442383,-0.000059366226,0.016616821,0.013420105,-0.022491455,0.014259338,-0.031707764,-0.007663727,-0.030700684,-0.00049829483,-0.021514893,0.0032749176,0.041015625,0.022720337,0.012519836,-0.017456055,-0.018920898,0.024978638,0.054107666,0.00054216385,-0.03086853,-0.003232956,0.0020179749,-0.0087509155,0.0017108917,0.0017108917,-0.034179688,-0.020401001,-0.005821228,-0.00806427,0.0052986145,0.0008234978,0.027633667,0.0022945404,-0.022033691,-0.0005888939,0.019622803,-0.011833191,0.0039024353,0.011192322,-0.0067825317,0.03338623,0.03189087,-0.012176514,0.028717041,0.012535095,-0.04336548,0.055664062,0.0019311905,0.0104599,-0.010253906,0.013763428,-0.039154053,-0.0012741089,0.0051612854,0.0146865845],"createdAt":"2026-04-18T18:43:58.862Z","updatedAt":"2026-04-22T10:01:41.104Z","lastSeenAt":"2026-04-22T10:01:41.104Z","tsv":"'/api/v1/cards/90':67,191 '/docs':225 '/pricing':226 '/readme':227 '/request':17,34 '0.02':16,33,78,93,171 '000':84 '20':83 '402 payment api' '6':91 'access':45,73,218 'actual':208,241 'address':116 'advertis':128 'ai':10,27,140 'analysi':144 'analyt':134 'api':4,21,41,72,132,176,201,217 'attach':103 'base':7,24,61,85 'base network api' 'behavior':245 'behind':51 'broader':126 'call':80 'caller':102 'categori':130,202 'classif':147 'clear':194 'commit':184 'connect':233 'content':238 'convers':164 'cost':75 'data':9,26,133,137 'decim':92 'descript':213 'detail':222 'document':200,223 'embed':148 'endpoint':14,31,50,65,167,190,248 'estim':158 'exact':100 'exchang':153 'export':138 'feed':152 'financ':11,28,149 'four':129 'fulfil':120 'function':209 'gas':157 'gate':3,20,44 'generat':165 'geocod':162 'handl':96 'header':108 'infrastructur':160 'insight':139 'json-response' 'key':177 'land':205 'learn':142 'limit':180 'list':69,169 'low payment fee' 'lowpaymentfee.com':35 'machin':141 'map':195 'marketplac':42 'maxamountrequir':81 'metric':135 'micropay':55 'micropayment api' 'minimum':183 'network':62 'no-api-key' 'note':186 'offer':8,25 'page':206,224 'pay-per-request api' 'payment':94,107,112 'payto':115 'per':53,79,172 'per-request':52 'per-request-micropayment' 'platform':5,22,127 'post-method' 'premium':71,216 'price':151 'prompt':234 'protocol':40 'quot':156 'rate':154,179 'remain':249 'report':136 'request':54,122,173 'request/response':242 'requir':185 'return':228 'say':215 'schema':243 'scheme':101 'sentiment':143 'server':119 'settl':56 'sign':111 'simpli':214 'specif':64,189 'substant':237 'summar':146 'text':145 'token':155 'unit':86 'unknown':211 'unverifi':250 'upon':123 'usdc':58,88 'usdc api access' 'usdc-base' 'util':13,30,161 'valid':163 'varieti':48 'verif':124 'via':97 'wallet':232 'wallet-connect':231 'web3':150 'x':106 'x-payment':105 'x402':2,19,39,99 'x402 api' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"e2f1cf36-8940-40af-b5dd-a8661b7e3eed","listingId":"265ce2b6-3198-415b-952f-9a39f65e3ce0","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/cards/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:58.862Z"}],"sources":[{"listingId":"265ce2b6-3198-415b-952f-9a39f65e3ce0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:58.862Z","lastSeenAt":"2026-04-22T10:01:41.104Z"}],"details":{"listingId":"265ce2b6-3198-415b-952f-9a39f65e3ce0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/90 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/cards/90"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/cards/90"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Four API categories listed: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium API endpoints without traditional API key management","Agent-driven workflows that need to pay per call using on-chain USDC on Base","Exploring x402 protocol integration for micropayment-gated services"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that can autonomously pay for API calls via crypto micropayments","Users who want pay-as-you-go access without subscriptions or rate limits"],"notFor":["Users who need detailed API documentation and well-defined schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:25.769Z"},"updatedAt":"2026-04-22T10:01:41.104Z"}}