{"id":"6639b339-3a24-4aac-817a-6efd5790c33e","shortId":"YJsD6J","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/payments/62` is listed under the title \"Premium API Access\" but the crawled material does not clarify what data or functionality this particular endpoint returns — it may be a generic or demonstration endpoint. The x402 challenge confirms it is live, accepting POST requests, and requires a payment of up to 20,000 base units of USDC (0.02 USD) on Base (asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The payment timeout is 300 seconds.\n\nThe platform's documentation pages (/docs, /pricing, /api, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so details about request/response schemas, authentication flows, or the specific behavior of this endpoint are unavailable. Without documentation or example responses, the actual utility of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-method","json-response"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The specific functionality of /api/v1/payments/62 ('Premium API Access') is not described anywhere in the crawled material","No request or response schema is documented; callers cannot know what to send or expect back","The endpoint path '/api/v1/payments/62' with a numeric ID suggests it may be a dynamically generated or demo resource"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/62","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/payments/62","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 there is no documentation, no request/response schema, and no clarity on what 'Premium API Access' actually returns. The docs, pricing, API, and README pages are all empty beyond a wallet-connect prompt.","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":"2026-04-19T07:17:41.367Z","embedding":[-0.015602112,-0.03729248,0.05529785,0.013496399,0.009628296,-0.026321411,-0.023666382,0.037841797,0.08258057,-0.07104492,0.023071289,-0.05029297,-0.03213501,-0.049346924,-0.03338623,0.0068855286,-0.008285522,0.005065918,-0.0357666,0.029754639,0.030853271,-0.027328491,-0.0345459,0.037109375,0.0053863525,-0.019210815,-0.017715454,-0.01473999,-0.009094238,-0.044769287,0.034576416,-0.027359009,-0.0062561035,0.016220093,-0.026062012,-0.024017334,-0.008575439,0.037719727,0.022445679,-0.01689148,-0.006378174,-0.055023193,-0.009773254,-0.0022354126,-0.05609131,-0.0050964355,0.00356102,-0.025634766,-0.0073623657,0.010536194,-0.03829956,0.0014181137,-0.007835388,0.0026474,0.011474609,0.014083862,0.00831604,-0.009498596,0.005393982,0.023529053,-0.004146576,-0.06414795,-0.01737976,-0.011978149,0.0010766983,0.056396484,-0.016204834,0.04940796,0.017364502,0.0597229,0.034454346,0.06451416,0.023513794,0.018630981,0.0031585693,-0.000831604,0.0128479,0.06124878,-0.0181427,-0.012062073,-0.0104522705,-0.01789856,-0.046203613,0.007472992,-0.021820068,-0.04135132,-0.020492554,0.022903442,-0.010047913,0.014526367,-0.078430176,0.0009813309,-0.009063721,0.0076560974,0.0010814667,-0.006904602,-0.0146484375,0.014381409,-0.016616821,0.022872925,0.017654419,-0.044433594,0.009239197,0.008377075,0.035125732,0.044677734,0.028274536,0.03427124,0.005329132,-0.013641357,-0.019515991,0.022323608,-0.012168884,-0.015197754,0.012817383,0.008399963,-0.017623901,0.011833191,-0.02293396,0.019760132,-0.048706055,0.05014038,0.015930176,-0.018096924,0.011947632,-0.045074463,-0.0076560974,0.013420105,-0.028167725,-0.00333786,0.012954712,0.0075263977,0.029083252,-0.017074585,-0.033325195,0.01763916,-0.018173218,-0.020523071,-0.049682617,-0.036224365,0.042114258,-0.041381836,0.01991272,0.038024902,-0.09844971,-0.0032348633,-0.047912598,0.0030345917,-0.035369873,-0.006137848,-0.0018749237,0.021865845,-0.010185242,-0.0022621155,-0.029815674,-0.023498535,0.004962921,0.034118652,-0.03286743,0.05441284,-0.0035705566,0.027404785,0.024429321,0.013183594,0.028198242,0.031341553,0.004432678,-0.07220459,-0.08935547,-0.021331787,-0.0060691833,-0.016693115,-0.038330078,0.007686615,-0.0077323914,-0.062805176,-0.025161743,-0.0048446655,0.0015668869,-0.038909912,0.0021953583,-0.041992188,0.017364502,-0.0038700104,-0.0692749,-0.01802063,-0.026229858,0.07208252,0.028579712,0.009880066,0.04437256,-0.01737976,0.0619812,0.017440796,-0.025802612,-0.032806396,0.021270752,-0.018081665,0.012901306,-0.00076055527,0.004009247,-0.031982422,0.03137207,0.064575195,0.021865845,-0.011581421,-0.0001988411,-0.044708252,-0.032440186,-0.044433594,0.014633179,0.006702423,0.0029773712,0.029663086,-0.028198242,-0.0368042,0.005935669,0.006515503,0.01802063,0.054870605,0.014633179,-0.0006275177,0.028060913,0.02658081,-0.041748047,0.03604126,0.0236969,0.01828003,-0.023803711,-0.02532959,0.027770996,0.035827637,-0.027542114,0.013435364,-0.015464783,0.037322998,-0.009429932,0.016342163,0.017791748,-0.017562866,-0.025863647,-0.029449463,-0.022354126,0.030212402,0.0022525787,-0.01625061,-0.03677368,-0.0713501,0.04425049,0.03878784,0.03567505,-0.020019531,0.006095886,-0.03012085,-0.010238647,-0.067871094,0.056610107,0.07788086,-0.016113281,-0.0059280396,0.00945282,-0.0065460205,-0.039031982,-0.0030994415,-0.0095825195,-0.026062012,-0.021774292,0.0023918152,-0.038604736,-0.00042176247,0.008171082,0.024429321,0.05947876,-0.0012845993,-0.050567627,-0.027862549,0.0023994446,0.004512787,-0.02861023,0.005542755,-0.007575989,0.0105896,0.028015137,0.001244545,0.021911621,-0.0016450882,0.005012512,-0.0066337585,-0.0010404587,-0.018005371,-0.032684326,0.008331299,-0.011184692,-0.06616211,0.005722046,-0.0038089752,0.06530762,-0.041290283,0.03640747,-0.0027599335,-0.0065078735,0.06506348,-0.011619568,-0.058746338,0.008354187,0.025238037,0.02798462,0.04989624,0.013824463,-0.032348633,-0.012458801,0.06439209,-0.022354126,-0.010444641,0.009552002,0.017349243,0.039093018,0.00021290779,-0.05319214,-0.030776978,-0.0015745163,-0.032196045,0.020599365,-0.019104004,0.036743164,-0.018920898,0.0046157837,-0.02923584,-0.005821228,-0.030776978,0.01235199,-0.019180298,0.0000017285347,-0.018188477,-0.009384155,0.024429321,0.010437012,-0.0027942657,0.013717651,0.04144287,0.014343262,-0.00082302094,-0.03250122,-0.012283325,-0.011878967,0.007106781,0.028167725,0.027877808,0.014266968,0.050750732,-0.038269043,0.015037537,0.036712646,0.015296936,0.044158936,-0.0026817322,0.013084412,-0.072387695,-0.059417725,-0.016098022,-0.044036865,0.031341553,0.0016622543,0.0009202957,0.056274414,0.013366699,-0.028747559,-0.049224854,0.016616821,-0.043823242,-0.007801056,0.042907715,-0.0070495605,-0.014289856,-0.0013246536,0.0062675476,0.008834839,0.043182373,0.016143799,0.013252258,0.062347412,0.047027588,0.007270813,0.0128479,0.012207031,0.023773193,0.0028934479,-0.022628784,-0.026046753,-0.0132369995,0.027877808,-0.013717651,-0.010475159,-0.070251465,0.055603027,0.045776367,0.09088135,0.02128601,0.005050659,0.028198242,-0.023727417,0.008323669,-0.032409668,-0.01991272,-0.023513794,-0.057861328,0.025115967,-0.026062012,-0.006286621,-0.014854431,0.027755737,0.00016248226,0.028045654,-0.028244019,0.05303955,0.0030021667,-0.0057029724,0.01576233,0.01638794,0.040008545,0.05508423,-0.030731201,0.03781128,0.02281189,-0.04119873,0.00944519,0.035491943,-0.024093628,-0.004371643,-0.051208496,-0.019241333,-0.006504059,-0.004142761,-0.056549072,-0.0026397705,0.0069847107,0.01826477,0.028060913,-0.02204895,-0.024505615,0.002729416,-0.0028800964,-0.053985596,-0.008300781,-0.026626587,0.004005432,0.043518066,-0.027511597,-0.0034046173,0.012123108,-0.009513855,0.0037593842,0.0053710938,0.016784668,-0.0077590942,-0.033325195,0.024810791,0.00207901,0.027236938,0.0054893494,0.030960083,0.006576538,0.030212402,0.05328369,0.013977051,-0.013221741,-0.051635742,0.019714355,-0.0619812,0.0054130554,0.015655518,-0.009597778,-0.007972717,-0.017852783,-0.02607727,-0.030654907,0.01159668,-0.022750854,0.0059127808,0.018920898,-0.02822876,-0.034973145,-0.053253174,-0.014801025,0.0023899078,0.070129395,0.028060913,0.00052309036,-0.06304932,-0.012306213,0.024887085,0.0059051514,0.017745972,-0.014801025,-0.016189575,-0.0128479,-0.027801514,-0.02017212,-0.013572693,0.014984131,-0.009666443,-0.010925293,0.035186768,0.004009247,0.028198242,0.0045433044,0.012245178,0.03213501,-0.030548096,0.0033473969,-0.012718201,0.044952393,0.005264282,-0.012489319,-0.056915283,0.04763794,0.012908936,0.027435303,-0.029083252,-0.0051956177,-0.00089740753,0.019195557,0.011398315,-0.01574707,-0.011054993,-0.015945435,-0.050109863,-0.06549072,0.04650879,-0.019012451,0.031707764,0.022216797,0.0075912476,0.013183594,-0.0005540848,0.002603531,0.026367188,-0.02406311,-0.014282227,-0.033569336,-0.028671265,-0.016677856,-0.010726929,-0.020187378,0.01499939,-0.021362305,0.011795044,0.001742363,-0.02848816,0.023117065,-0.0077590942,-0.0020160675,0.016220093,0.0041122437,0.02178955,0.039978027,0.011688232,-0.037078857,0.019470215,-0.0025043488,0.00907135,-0.008781433,0.05206299,0.032073975,-0.005092621,0.00024485588,0.00088214874,-0.024520874,-0.022232056,0.0023651123,-0.0015068054,0.020263672,-0.0037994385,-0.029449463,0.025787354,0.012001038,-0.03289795,-0.015670776,0.018325806,0.008338928,-0.03253174,0.016326904,0.027542114,0.05230713,-0.019577026,-0.00018656254,0.0126953125,0.024978638,0.027435303,0.017608643,-0.019561768,0.015457153,-0.014373779,0.020645142,0.005191803,-0.013008118,0.011276245,0.0059509277,0.023910522,0.019714355,0.0044021606,-0.021881104,-0.018585205,0.0008459091,-0.009979248,-0.018585205,0.021896362,0.023635864,0.021255493,-0.026992798,0.022140503,0.016693115,-0.017089844,-0.02067566,-0.009506226,0.034057617,-0.018829346,-0.020004272,0.012550354,0.012840271,0.035095215,-0.059417725,0.00083971024,0.0074920654,0.014289856,-0.03640747,-0.041107178,-0.04171753,-0.000644207,0.03237915,0.0135269165,0.023071289,0.027542114,-0.0020885468,0.0011091232,0.030212402,0.008918762,-0.0064582825,-0.017654419,-0.035491943,-0.008934021,-0.0029201508,-0.004501343,-0.02911377,0.008621216,-0.007865906,-0.026733398,0.007003784,-0.01638794,-0.007434845,-0.008224487,0.017410278,0.036590576,-0.0048179626,0.005317688,-0.027359009,-0.029815674,-0.0002040863,0.0068206787,0.020645142,-0.05279541,0.00819397,-0.013031006,-0.0038642883,0.0035934448,0.008857727,0.021865845,0.027572632,0.0027694702,0.028869629,-0.05090332,0.033325195,-0.030395508,0.012496948,0.008628845,-0.041259766,-0.0045394897,-0.026062012,-0.0155181885,0.04244995,-0.024337769,-0.015640259,-0.027801514,-0.040496826,-0.0070762634,-0.054626465,0.018508911,0.043151855,0.030517578,-0.033691406,0.00274086,-0.0078048706,-0.0023555756,-0.019088745,0.001200676,-0.012863159,0.018829346,0.019989014,0.009132385,-0.03866577,-0.021087646,-0.025680542,0.0006227493,-0.04660034,-0.042114258,-0.01524353,0.0036525726,-0.008705139,-0.009208679,-0.035125732,-0.022094727,-0.0054397583,-0.049591064,0.018249512,0.010375977,0.018539429,0.0074157715,-0.016433716,-0.00008815527,0.01991272,-0.0004720688,0.032806396,0.02154541,-0.014709473,-0.043792725,0.004966736,0.023910522,0.028137207,0.007419586,-0.009841919,-0.01499939,-0.018997192,-0.056121826,-0.016220093,-0.010139465,-0.011390686,-0.010536194,0.01373291,-0.042144775,-0.0010023117,-0.016738892,0.002670288,0.015205383,0.010505676,0.012123108,0.0012559891,0.009597778,-0.0062446594,-0.019332886,-0.032287598,0.021881104,0.010429382,0.0008764267,0.023986816,0.05065918,0.004005432,-0.017456055,0.008621216,0.003364563,0.0060653687,-0.024490356,0.0088272095,-0.018722534,0.00207901,-0.014671326,-0.007419586,-0.034301758,-0.006061554,0.09094238,-0.0065078735,-0.019546509,-0.015403748,-0.020095825,0.02166748,0.03387451,-0.036010742,-0.0067634583,-0.022415161,0.012214661,-0.016235352,0.01864624,0.013977051,0.020126343,-0.014816284,-0.055603027,-0.016555786,0.008163452,-0.018112183,-0.06567383,-0.019897461,-0.06652832,-0.009437561,-0.009384155,-0.018875122,0.008132935,0.013298035,-0.011268616,-0.09741211,0.00078725815,0.040374756,0.010795593,0.025115967,-0.008781433,0.021896362,0.02027893,-0.037322998,-0.020721436,0.036224365,-0.02897644,-0.006088257,-0.036315918,0.019561768,-0.011695862,-0.016586304,0.022460938,0.010231018,0.01725769,-0.007598877,0.005973816,-0.018814087,0.016723633,-0.011108398,0.017913818,-0.006996155,-0.019180298,0.032714844,-0.050476074,0.018127441,0.026412964,-0.0047798157,-0.002658844,0.01889038,0.036743164,-0.043792725,-0.008926392,0.027572632,0.0072135925,0.03668213,-0.019821167,0.037628174,0.01448822,-0.010871887,0.023956299,-0.011329651,-0.025512695,-0.036590576,-0.022399902,0.023330688,-0.007537842,0.02331543,-0.021255493,0.0034255981,0.019622803,0.008872986,0.0143585205,-0.008964539,-0.029342651,-0.014213562,0.0026302338,0.0021877289,-0.0013237,0.0054626465,0.029373169,0.016571045,0.03555298,0.011123657,-0.007369995,0.0019721985,0.02558899,-0.017623901,0.009002686,0.025268555,-0.0048713684,0.015670776,0.023773193,0.020004272,-0.040985107,-0.01399231,-0.02407837,-0.0023002625,0.0021591187,-0.003112793,-0.02029419,-0.011680603,-0.003917694,-0.011222839,-0.03387451,0.009902954,-0.026992798,-0.02558899,-0.0018596649,-0.026168823,0.024642944,0.015945435,0.016021729,0.019729614,0.0028305054,0.045043945,0.008453369,-0.014289856,0.03186035,0.03012085,0.00044465065,-0.026870728,-0.00047397614,-0.008087158,-0.00046873093,0.0019302368,-0.036193848,0.0075569153,0.041534424,-0.011985779,0.011672974,0.009887695,0.022079468,-0.006958008,0.008285522,-0.0041122437,0.022857666,-0.01600647,0.031311035,-0.042388916,0.008277893,0.022125244,0.0015687943,-0.012329102,-0.0070877075,-0.031799316,0.03326416,0.009765625,-0.018234253,0.050598145,-0.0021514893,0.02192688,-0.03125,-0.0088272095,0.0067749023,-0.028503418,-0.011245728,0.03213501,-0.0023651123,0.0005478859,0.02281189,-0.0262146,0.036956787,-0.031341553,0.030700684,-0.005844116,-0.0023460388,-0.010818481,-0.02104187,-0.02545166,-0.015777588,-0.015640259,-0.003396988,0.0059776306,0.04321289,0.014816284,0.029037476,0.048583984,0.009735107,0.006149292,-0.035858154,-0.03982544,0.007911682,-0.026733398,0.017700195,-0.019195557,0.061035156,0.04650879,-0.0036754608,0.03262329,0.028823853,0.029968262,0.015014648,0.007911682,-0.005683899,0.0057029724,-0.0038890839,0.015686035,0.0021514893,0.046325684,-0.03475952,0.028747559,0.014854431,0.02696228,-0.03201294,0.026733398,0.068115234,0.01802063,-0.021591187,0.0496521,-0.0044822693,-0.010314941,-0.015197754,-0.015960693,0.045440674,0.0044822693,0.059417725,0.03765869,0.017791748,-0.008674622,0.027130127,-0.02684021,-0.028762817,0.062347412,0.031173706,-0.01777649,-0.011329651,-0.010612488,0.0070610046,-0.053741455,-0.03173828,0.0124435425,-0.008300781,0.010910034,-0.0074539185,0.0058670044,-0.007369995,0.01625061,0.03189087,0.020339966,-0.016342163,0.036956787,0.034729004,0.0047035217,0.022354126,-0.0013942719,0.033294678,-0.02670288,-0.01348114,0.01576233,0.02154541,-0.012245178,-0.0069503784,0.019958496,0.0068206787,0.05279541,0.051208496,-0.019226074,0.01448822,0.035858154,0.014968872,-0.0038547516,0.047790527,0.034362793,0.014007568,0.050811768,0.031921387,0.02633667,-0.037597656,0.019332886,-0.0072250366,0.004501343,-0.0071258545,-0.014526367,0.011245728,-0.016220093,0.032409668,0.0018033981,-0.016601562,0.02456665,0.025756836,-0.0029754639,-0.0030174255,-0.0059509277,0.012268066,-0.020889282,0.0033817291,0.01727295,-0.010101318,0.039642334,0.013320923,0.03036499,-0.030578613,0.028762817,-0.0076560974,-0.01928711,-0.0054512024,0.017654419,-0.038146973,0.0031661987,-0.010498047,0.005104065,-0.047302246,0.017547607,0.031799316,-0.016708374,0.032440186,-0.0022296906,0.0016260147,0.0082092285,0.020858765,0.0017147064,-0.008964539,-0.010437012,-0.026672363,0.033203125,0.052764893,0.0061531067,0.017211914,-0.017028809,-0.0104522705,0.009223938,0.0023822784,-0.012229919,-0.014762878,-0.02204895,-0.034301758,0.010009766,0.04055786,0.021026611,0.037109375,-0.0067634583,-0.010910034,0.011383057,0.037841797,0.0031547546,-0.00806427,-0.01576233,0.021896362,-0.014213562,0.052520752,0.032470703,0.0058937073,0.032073975,-0.011627197,-0.023895264,0.008987427,-0.014320374,0.021728516,-0.013092041,0.004119873,-0.006958008,0.020812988,-0.02027893,-0.03894043,0.010925293,-0.010635376,-0.010223389,-0.027236938,-0.0013179779,0.015205383,0.033996582,0.03765869,0.012367249,-0.02658081,0.06951904,-0.017684937,0.0423584,-0.012756348,-0.0031967163,0.05206299,0.027496338,0.042999268,0.020858765,0.010818481,-0.034088135,0.018920898,0.040985107,0.021270752,0.007801056,-0.0028762817,-0.017547607,0.036376953,0.002357483,0.022338867,-0.017303467,0.00095939636,0.013824463,-0.0035705566,0.0021629333,-0.0007944107,-0.010894775,0.0039863586,0.037719727,-0.030593872,-0.009819031,-0.019317627,-0.011497498,0.029190063,-0.01360321,-0.00022399426,0.005443573,-0.021942139,0.022842407,-0.029052734,-0.02368164,0.0033912659,0.027175903,-0.03942871,-0.01725769,0.0070762634,0.012145996,-0.016860962,0.034210205,0.024963379,0.003419876,0.010238647,0.046936035,-0.009315491,0.035614014,-0.017578125,0.02217102,0.030334473,-0.0013961792,-0.015777588,0.010879517,0.009635925,-0.023986816,0.015235901,0.046783447,-0.010574341,0.0030460358,-0.00018644333,-0.012794495,0.016647339,0.008583069,-0.0077285767,-0.0011835098,-0.020263672,-0.017120361,0.00013017654,0.008857727,-0.00041365623,0.010612488,-0.0034294128,-0.006690979,0.012359619,0.04119873,0.020339966,-0.041168213,0.00053596497,0.004119873,0.015571594,-0.018737793,-0.009674072,-0.0010194778,-0.031036377,0.014709473,0.011756897,0.0010843277,0.015327454,-0.03225708,-0.001121521,0.023162842,0.017059326,0.022888184,0.0010185242,0.0032348633,0.024856567,-0.01864624,-0.00022602081,-0.011856079,-0.012084961,0.014877319,0.018295288,-0.005870819,-0.026763916,0.027328491,-0.004322052,0.017333984,0.008834839,-0.015090942,0.019104004,-0.012001038,-0.01146698,0.007987976,0.013000488,-0.005203247,-0.010795593,-0.010276794,0.026443481,0.051757812,-0.020431519,-0.0056495667,0.021392822,0.01448822,0.017105103,0.033325195,0.010528564,0.037750244,0.024673462,-0.02609253,-0.01939392,0.026229858,-0.020706177,-0.03668213,0.02154541,-0.016998291,-0.020050049,0.015312195,0.023254395,-0.001698494,-0.03326416,-0.015945435,-0.00919342,-0.016357422,0.01889038,-0.014022827,0.01071167,-0.02973938,-0.008766174,0.00046944618,-0.012664795,-0.042755127,-0.024337769,0.0005784035,-0.009841919,-0.043151855,0.020446777,-0.034240723,0.008178711,-0.024230957,-0.0034370422,-0.012489319,0.028060913,-0.01499939,-0.0115737915,0.021728516,0.022918701,0.025970459,0.013008118,0.016662598,-0.022857666,-0.036132812,-0.028305054,-0.0032901764,-0.013137817,0.022888184,-0.0031661987,0.034454346,0.022155762,-0.011528015,-0.0023078918,-0.0158844,-0.007205963,-0.0062446594,-0.020965576,-0.015197754,0.020187378,0.013618469,-0.011657715,-0.0154800415,0.03753662,-0.026992798,-0.019638062,0.029525757,0.040802002,0.00422287,0.032409668,-0.010246277,-0.013198853,-0.013153076,0.008239746,-0.017578125,0.005744934,0.007675171,0.0028839111,-0.01713562,0.0026016235,0.029785156,0.00042057037,-0.0010051727,0.019561768,-0.0072631836,-0.008964539,0.026245117,0.012367249,0.007003784,-0.0070343018,-0.008399963,0.021240234,0.03289795,0.018737793,0.0027313232,-0.0040626526,0.0095825195,-0.018035889,0.0074920654,0.021911621,-0.01612854,-0.036010742,-0.018798828,-0.026763916,0.019104004,0.009399414,0.014816284,-0.00497818,0.019485474,-0.020233154,-0.024475098,-0.020202637,0.02720642,0.015571594,-0.0124435425,-0.010231018,0.00050115585,0.019424438,-0.028793335,0.0045394897,-0.03579712,-0.036254883,-0.0013685226,-0.025039673,0.016845703,0.017120361,-0.004310608,-0.002840042,-0.0039634705,-0.0021781921,0.0019025803,0.025344849,-0.024398804,-0.012954712,0.02960205,0.011779785,-0.024810791,0.01133728,-0.012252808,-0.00050258636,0.020507812,-0.014907837,0.010375977,-0.008773804,0.03463745,-0.004585266,-0.017562866,0.021255493,-0.004234314,0.0140686035,-0.030883789,0.019424438,0.00084257126,0.0017528534,0.028060913,-0.03378296,-0.012680054,0.006450653,-0.02406311,-0.031677246,0.0027923584,0.015899658,0.040924072,-0.0044822693,0.03857422,-0.017532349,-0.020690918,0.018157959,0.0065612793,-0.01600647,-0.005519867,0.035308838,-0.00002092123,-0.0038414001,-0.011062622,-0.012290955,-0.035583496,-0.01663208,0.012123108,-0.008834839,-0.007095337,0.02822876,0.006969452,0.044677734,-0.00028300285,0.027954102,0.013160706,0.003786087,0.01991272,0.00466156,0.04901123,-0.0033187866,-0.026809692,0.0115356445,-0.0026187897,-0.02772522,-0.0077781677,-0.0096206665,-0.005771637,-0.046325684,0.012298584,-0.0050697327,0.028320312,-0.02128601,0.0093688965,-0.024673462,0.0013046265,-0.038879395,-0.012672424,-0.025100708,0.009025574,0.025756836,-0.0004041195,0.019210815,0.0026512146,-0.028411865,0.013343811,0.046936035,-0.0075187683,-0.023803711,-0.01828003,0.007335663,0.0026416779,0.004524231,0.0038223267,-0.01234436,-0.025741577,0.0011415482,-0.013366699,0.0069503784,-0.006755829,0.016662598,-0.0021381378,-0.001499176,-0.004611969,0.028564453,-0.009132385,-0.0035171509,0.012527466,0.013900757,0.035125732,0.03149414,-0.013305664,0.023361206,0.028579712,-0.033416748,0.055023193,-0.00052404404,0.022399902,-0.01033783,-0.008132935,-0.048187256,-0.02670288,-0.00831604,0.005634308],"createdAt":"2026-04-18T18:50:51.347Z","updatedAt":"2026-04-23T09:01:18.603Z","lastSeenAt":"2026-04-23T09:01:18.603Z","tsv":"'/api':178 '/api/v1/payments/62':103 '/docs':176 '/pricing':177 '/readme':179 '/request':13,28 '0.02':12,27,81,158 '000':153 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':164 '20':152 '300':169 'Base network API' 'USDC micropayment endpoint' 'accept':142 'access':7,22,38,111 'actual':213 'ai':68 'analyt':67 'api':6,21,37,64,93,110 'asset':162 'authent':196 'base':9,24,89,154,161 'behavior':201 'call':4,19 'challeng':137 'clarifi':118 'collect':58 'commit':98 'confirm':138 'connect':184 'content':190 'contract':163 'crawl':114 'crypto-paid API' 'data':66,120 'demonstr':133 'detail':192 'document':174,208 'endpoint':32,49,77,102,125,134,204,217 'exampl':210 'financ':71 'flow':197 'function':122 'generic':131 'host':56 'infrastructur':74 'json-response' 'key':94 'learn':70 'limit':96 'list':105 'live':141 'lowpaymentfee' 'lowpaymentfee.com':34,53 'machin':69 'mani':48 'materi':115 'may':128 'network':90 'offer':50 'one':46 'page':175 'particular':124 'pay':2,17,61 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':60 'payment':42,148,166 'per':3,18,62,82 'platform':54,172 'post':143 'post-method' 'premium':5,20,36,109 'price':79 'prompt':186 'protocol':43 'provid':35 'rate':95 'remain':218 'request':63,83,144 'request/response':194 'requir':99,146 'respons':211 'return':126,181 'schema':195 'second':170 'settl':84 'span':65 'specif':101,200 'substant':189 'timeout':167 'titl':108 'unavail':206 'unclear':219 'unit':155 'usd':159 'usdc':15,30,86,157 'usdc-base' 'util':75,214 'via':10,25,39 'wallet':185 'web3':72 'without':207 'x402':11,26,41,136 'x402 API' 'x402-payment'","prices":[{"id":"4775a8d9-3adc-4ac2-941a-b318f9d39cc1","listingId":"6639b339-3a24-4aac-817a-6efd5790c33e","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/payments/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:51.347Z"}],"sources":[{"listingId":"6639b339-3a24-4aac-817a-6efd5790c33e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:51.347Z","lastSeenAt":"2026-04-23T09:01:18.603Z"}],"details":{"listingId":"6639b339-3a24-4aac-817a-6efd5790c33e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/62 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/62"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs 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/payments/62"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Demonstrating x402 payment protocol integration for agent-to-agent commerce","Testing pay-per-call API patterns without API keys or subscriptions"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-use API access on Base","Projects requiring low-friction micropayment-gated endpoints"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring free or subscription-based access patterns","Use cases needing high-throughput batch processing (no documented rate limits but no guarantees either)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:05.807Z"},"updatedAt":"2026-04-23T09:01:18.603Z"}}