{"id":"a78854f3-3544-4824-811d-927a3cc40945","shortId":"nKcxBk","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at `/api/endpoint-45` is part of lowpaymentfee.com, a platform offering a variety of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint is labeled \"Premium API Access\" and accepts POST requests, returning application/json responses. Payment is handled via the x402 protocol on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), with a maximum amount of 20,000 units (in USDC's 6-decimal representation, this equates to $0.02 per request).\n\nThe platform advertises a simple pricing model of $0.02 per request across all its endpoints, with no API keys, no rate limits, no minimums, and instant access. However, the specific functionality behind `/api/endpoint-45` is not documented — it does not appear in the site's listed API catalog, which uses versioned paths like `/api/v1/` and `/api/v2/`. The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or schema details for this particular endpoint, its actual capabilities remain unknown.\n\nThe x402 challenge is live and well-formed, confirming the endpoint is operational and accepting payment-gated requests. But the lack of input/output schema, example payloads, or any description of what this endpoint actually does significantly limits its usefulness for programmatic discovery by agents.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-request","json-response","post-method"],"categories":["api","x402"],"synonyms":["premium API","paid endpoint","x402 API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["Endpoint /api/endpoint-45 is not listed in the provider's own API catalog — its purpose is unknown","No input schema or output schema documented; callers cannot know what to send or expect","All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no content","The generic name 'Premium API Access' provides no indication of actual functionality"],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-45","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/endpoint-45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, but this specific endpoint (/api/endpoint-45) has no documentation, no input/output schema, no examples, and does not appear in the site's own API catalog. The crawled docs/pricing/README pages were all empty beyond a wallet-connect prompt. The actual functionality is completely 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":"2026-04-18T19:35:29.612Z","embedding":[-0.021560669,-0.02760315,0.031555176,0.01928711,0.010864258,-0.02381897,-0.034301758,0.038970947,0.07330322,-0.07354736,0.037231445,-0.052368164,-0.03289795,-0.04498291,-0.035125732,0.010765076,-0.014266968,0.007232666,-0.046539307,0.04034424,0.04611206,-0.016555786,-0.02180481,0.034851074,0.00089263916,-0.017868042,-0.012794495,-0.010398865,-0.008163452,-0.014091492,0.022125244,-0.028244019,-0.003982544,0.02381897,-0.0154953,-0.011993408,-0.0037403107,0.05291748,0.031921387,-0.012878418,0.0019836426,-0.057128906,-0.00819397,-0.00046610832,-0.04840088,0.0011329651,-0.0010328293,-0.024337769,-0.015777588,0.005645752,-0.021774292,0.0020313263,-0.022384644,-0.00390625,0.013679504,0.008552551,-0.01386261,-0.020050049,0.01663208,0.0034046173,-0.018218994,-0.07067871,-0.014480591,0.0050315857,0.0063438416,0.038330078,-0.01701355,0.05392456,0.014907837,0.0670166,0.05218506,0.057922363,0.031921387,0.010040283,0.003364563,-0.016616821,0.004055023,0.041290283,-0.025360107,-0.016067505,-0.027618408,-0.0076408386,-0.043121338,-0.02017212,-0.017150879,-0.051696777,-0.01826477,0.014968872,-0.019378662,0.021072388,-0.06744385,0.0009794235,-0.010284424,0.013259888,-0.012809753,-0.010185242,-0.01864624,0.009643555,-0.0065841675,0.018844604,0.022949219,-0.03994751,0.027160645,0.007534027,0.05722046,0.042053223,0.007873535,0.045074463,-0.00009918213,-0.032562256,-0.009468079,0.0035820007,-0.026031494,-0.016067505,0.017074585,0.0043678284,-0.01637268,0.021774292,-0.020004272,0.02760315,-0.059570312,0.064086914,0.014625549,-0.023910522,0.0039901733,-0.035491943,-0.0022945404,-0.011550903,-0.032196045,0.010246277,0.027542114,-0.0027236938,0.024978638,-0.032409668,-0.03387451,0.013648987,-0.031951904,-0.023452759,-0.05493164,-0.019638062,0.029174805,-0.030853271,0.02760315,0.039642334,-0.093811035,-0.002565384,-0.046691895,0.022216797,-0.041168213,0.0075187683,0.008590698,0.022064209,-0.02128601,-0.018432617,-0.019042969,-0.021057129,-0.017044067,0.036010742,0.0018634796,0.04824829,-0.00091171265,0.02835083,0.020385742,0.0113220215,0.021911621,0.04220581,0.009010315,-0.0592041,-0.08453369,-0.03427124,-0.007572174,-0.018814087,-0.04360962,0.0070533752,0.003419876,-0.06335449,-0.033233643,-0.012649536,0.007007599,-0.028900146,-0.007911682,-0.022781372,0.012908936,-0.00041151047,-0.061645508,-0.037017822,-0.022720337,0.072631836,0.0211792,0.001499176,0.01725769,-0.0060195923,0.068237305,0.013061523,-0.03881836,-0.050048828,0.02330017,-0.01953125,0.029785156,0.0025291443,0.0070724487,-0.032714844,0.03326416,0.061553955,0.01625061,-0.0028972626,-0.00020503998,-0.03540039,-0.02545166,-0.057922363,0.007801056,0.00844574,0.0038394928,0.031585693,-0.021316528,-0.040222168,-0.0011777878,0.0013742447,0.033477783,0.061065674,0.0014686584,0.0009531975,0.0021953583,0.018249512,-0.042419434,0.044677734,0.024658203,0.020385742,-0.037719727,-0.020935059,0.020828247,0.037872314,-0.0418396,-0.009643555,-0.016708374,0.019973755,-0.007293701,-0.0072250366,0.03265381,-0.01448822,-0.025924683,-0.041900635,-0.006111145,0.019622803,0.0044288635,-0.022247314,-0.043914795,-0.06567383,0.032592773,0.0670166,0.033843994,-0.002538681,0.013580322,-0.021270752,-0.014038086,-0.06036377,0.042144775,0.056365967,-0.030822754,-0.015052795,0.014076233,-0.018066406,-0.03491211,-0.014907837,0.00340271,-0.018722534,-0.03164673,-0.0042152405,-0.032928467,0.0052223206,0.018981934,0.038116455,0.0418396,-0.013137817,-0.05493164,-0.0357666,-0.0029697418,0.025878906,-0.03387451,-0.01574707,0.0012845993,0.006668091,0.03378296,0.009902954,0.018707275,-0.001704216,0.013908386,-0.009002686,-0.007686615,-0.02243042,-0.024627686,0.020965576,-0.0046157837,-0.07128906,0.012908936,-0.0065689087,0.07775879,-0.049835205,0.050811768,-0.014907837,0.019180298,0.064208984,-0.0231781,-0.058502197,-0.0062789917,0.02558899,0.04953003,0.03894043,0.009063721,-0.0018749237,-0.004055023,0.03994751,-0.014144897,0.0032691956,0.015281677,0.021881104,0.03414917,0.0018815994,-0.062438965,-0.0317688,-0.008270264,-0.029647827,0.020950317,-0.031799316,0.024993896,-0.009811401,-0.0045394897,-0.035980225,-0.0070533752,-0.0501709,-0.0011901855,-0.031280518,-0.0034294128,-0.012619019,-0.011604309,0.018951416,0.020019531,-0.011161804,0.0045776367,0.03253174,0.017974854,-0.014968872,-0.02355957,-0.014556885,-0.026992798,0.01234436,0.013069153,0.024047852,0.020431519,0.022537231,-0.04248047,0.0143585205,0.018325806,0.023071289,0.04272461,-0.016616821,0.010879517,-0.06542969,-0.076660156,-0.020858765,-0.04623413,0.031036377,-0.0028018951,0.013908386,0.04043579,0.010734558,-0.010765076,-0.03869629,0.03186035,-0.035003662,0.0014419556,0.041870117,-0.018936157,-0.035217285,0.0036125183,0.021636963,0.013961792,0.02960205,0.0049209595,0.007045746,0.06311035,0.047729492,0.011703491,0.01939392,0.0017318726,0.03643799,-0.00869751,-0.02029419,-0.029190063,-0.016586304,0.015823364,-0.026565552,-0.012084961,-0.081970215,0.03656006,0.023605347,0.08276367,-0.002790451,0.022857666,0.032409668,-0.022964478,0.016845703,-0.036315918,-0.023773193,-0.027160645,-0.043426514,0.032958984,-0.0046806335,0.0006098747,-0.025756836,0.018295288,0.01663208,0.015586853,-0.040130615,0.061645508,0.00009161234,-0.013786316,0.01777649,0.008598328,0.044128418,0.053863525,-0.046325684,0.018096924,0.025817871,-0.03338623,-0.002948761,0.038482666,-0.01335144,-0.018798828,-0.05630493,-0.02456665,-0.0021648407,-0.008651733,-0.061920166,0.0070648193,-0.0066871643,0.03692627,0.012924194,-0.017715454,-0.034057617,-0.005580902,-0.017547607,-0.047180176,-0.019546509,-0.03765869,0.020431519,0.051208496,-0.023498535,-0.015777588,-0.0034236908,-0.001824379,0.0006685257,0.009513855,-0.019561768,-0.008468628,-0.03668213,0.0181427,0.0018863678,0.022644043,0.020233154,0.028762817,0.031555176,0.022994995,0.042022705,0.008995056,-0.020706177,-0.052490234,0.0061950684,-0.045166016,0.0076179504,0.008155823,-0.015586853,-0.010284424,-0.024475098,-0.021118164,-0.027542114,0.013755798,-0.030181885,0.021316528,0.027938843,-0.04522705,-0.041381836,-0.054534912,-0.029541016,0.011108398,0.08959961,0.026824951,-0.0025367737,-0.036071777,-0.024627686,0.026367188,-0.0024776459,0.011695862,-0.015548706,-0.019897461,-0.015213013,-0.03515625,-0.026290894,-0.028900146,0.030685425,-0.007987976,-0.024246216,0.025741577,-0.026260376,0.024856567,-0.002910614,-0.0011491776,0.03704834,-0.020339966,-0.0014629364,-0.03074646,0.04043579,0.005794525,-0.01121521,-0.05670166,0.05706787,0.0048179626,0.024032593,-0.038116455,0.008216858,-0.0019607544,0.023071289,0.006565094,-0.024932861,-0.01725769,0.010215759,-0.04574585,-0.08087158,0.030670166,-0.008110046,0.029037476,0.0048065186,0.016418457,0.038269043,0.004108429,-0.0046310425,0.02319336,-0.023422241,-0.0077400208,-0.041107178,-0.04168701,-0.025375366,0.010154724,-0.014427185,0.018966675,-0.01499939,0.012275696,-0.002532959,-0.031204224,0.036621094,0.007331848,0.009475708,0.031555176,0.009208679,0.010231018,0.039794922,0.008735657,-0.024490356,0.024749756,0.007007599,-0.0037899017,0.0002963543,0.044189453,0.016235352,-0.014839172,-0.0038528442,-0.005844116,-0.011604309,-0.018630981,-0.020996094,0.003004074,0.041412354,0.010879517,-0.03060913,0.041290283,0.016662598,-0.03060913,-0.0071411133,0.022537231,0.024108887,-0.037078857,0.0078048706,0.02017212,0.054229736,-0.026550293,-0.0013380051,0.019943237,0.020019531,0.017044067,0.021057129,-0.024841309,0.0066223145,-0.011024475,0.016143799,0.010192871,-0.022384644,0.011474609,-0.004749298,0.023803711,0.025299072,0.027572632,-0.028533936,-0.02357483,-0.009841919,-0.006111145,-0.0107421875,0.027862549,0.026397705,0.01675415,-0.019332886,0.030883789,0.02204895,-0.037261963,-0.027297974,-0.013023376,0.03704834,-0.013206482,-0.005405426,0.010848999,0.0034294128,0.03515625,-0.050476074,-0.0070877075,0.00198555,0.022628784,-0.024627686,-0.036132812,-0.03842163,-0.017349243,0.040008545,0.01234436,0.0001373291,0.033294678,-0.005279541,0.0055885315,0.017410278,0.0023288727,-0.014320374,-0.027404785,-0.044708252,-0.004711151,0.004310608,-0.0060920715,-0.010665894,0.013786316,-0.02420044,-0.021469116,0.011390686,-0.010925293,-0.0075263977,-0.011627197,0.00699234,0.03366089,0.004650116,0.011352539,-0.007259369,-0.023452759,0.006374359,0.012031555,0.025909424,-0.030471802,0.01499939,-0.017578125,0.00982666,-0.019485474,0.021911621,0.018844604,0.020004272,0.0024318695,0.025802612,-0.040924072,0.02961731,-0.021865845,0.001739502,0.010871887,-0.0435791,-0.017044067,-0.025146484,-0.021133423,0.035186768,-0.027786255,0.010612488,-0.026748657,-0.021820068,-0.011222839,-0.049804688,0.021636963,0.021865845,0.0340271,-0.039520264,0.007171631,0.0004324913,-0.00031924248,-0.009033203,0.0050811768,-0.0021476746,0.022994995,0.02671814,0.0025691986,-0.025558472,-0.026138306,0.006629944,-0.004753113,-0.047729492,-0.03427124,-0.023956299,0.002029419,-0.0067710876,-0.001745224,-0.032318115,-0.015960693,0.00008636713,-0.039123535,0.005897522,0.011726379,0.019546509,0.022827148,-0.020019531,-0.0052833557,0.015388489,-0.016418457,0.025512695,-0.0073242188,0.0011768341,-0.048706055,-0.005039215,0.032562256,0.022201538,0.008682251,-0.019226074,0.001701355,-0.018463135,-0.055999756,-0.0024032593,-0.014556885,0.016159058,0.0064201355,-0.0043144226,-0.057434082,-0.00894165,-0.020629883,0.014091492,0.016799927,0.0107803345,0.021850586,-0.0070343018,0.00072813034,-0.013076782,-0.021270752,-0.045928955,0.005722046,0.011260986,0.0010461807,0.013587952,0.047912598,0.008476257,0.0013856888,0.017623901,0.005847931,0.0052490234,-0.03314209,0.01638794,-0.002275467,0.0154418945,-0.011245728,-0.01777649,-0.027297974,-0.0005402565,0.07501221,-0.010421753,0.02003479,-0.010047913,-0.008628845,0.014160156,0.034606934,-0.05593872,0.002664566,-0.029724121,0.022277832,-0.0001103282,0.02885437,0.010429382,0.017471313,-0.030639648,-0.056518555,-0.0058555603,0.020141602,0.0002515316,-0.05609131,-0.01625061,-0.06549072,-0.013343811,-0.008224487,-0.015808105,0.008056641,-0.0035705566,-0.015556335,-0.09008789,-0.0060653687,0.057128906,0.007843018,0.00793457,-0.018112183,0.018844604,0.027496338,-0.020019531,-0.026824951,0.026245117,-0.036468506,-0.022277832,-0.034210205,0.04562378,-0.024734497,-0.028137207,0.023284912,0.012016296,0.019836426,-0.011795044,0.0070114136,-0.011108398,0.0055656433,-0.013908386,0.018112183,-0.0109939575,-0.015235901,0.030792236,-0.040496826,0.020431519,0.008857727,-0.0009288788,-0.0048065186,0.02281189,0.020874023,-0.040649414,-0.0050621033,0.047607422,0.0109939575,0.041229248,-0.038330078,0.034606934,0.0103302,-0.012245178,0.017303467,-0.015159607,-0.021469116,-0.048034668,-0.03366089,0.0093688965,0.008544922,0.018585205,-0.014984131,0.0045700073,0.019821167,0.010353088,0.005760193,-0.016860962,-0.02722168,-0.016052246,0.014755249,-0.00016140938,-0.004676819,-0.0040779114,0.012016296,0.01890564,0.0413208,0.007472992,-0.0113220215,0.015014648,0.019302368,-0.020843506,0.0184021,0.015182495,0.0023937225,0.0107421875,0.013801575,0.025222778,-0.04031372,-0.012527466,-0.004306793,0.000115692616,-0.0005493164,-0.0005631447,-0.012229919,-0.0009598732,0.0011472702,0.0017366409,-0.04949951,0.012588501,-0.030044556,-0.026657104,-0.0071144104,-0.022918701,0.016021729,0.01576233,-0.0011396408,0.0040245056,-0.00680542,0.034942627,-0.0006866455,-0.023529053,0.018600464,0.027786255,0.010910034,-0.029190063,0.0057868958,0.0015974045,-0.0124435425,0.006549835,-0.0141067505,0.009933472,0.02835083,-0.0181427,0.016036987,0.0082473755,0.025283813,-0.0069274902,0.023223877,-0.0036468506,0.012451172,-0.025161743,0.038482666,-0.0501709,0.009391785,0.023483276,0.0068588257,-0.013366699,-0.018966675,-0.02949524,0.0231781,0.015602112,-0.022964478,0.048034668,-0.012016296,0.030426025,-0.028320312,-0.01638794,-0.007106781,-0.016082764,-0.017868042,0.028747559,-0.004966736,0.010475159,0.021118164,-0.037628174,0.029968262,-0.048095703,0.016220093,0.0039863586,0.010063171,-0.017959595,-0.03744507,-0.0024604797,-0.013969421,-0.013908386,-0.00447464,0.0032043457,0.040924072,0.032592773,0.012924194,0.019699097,0.018875122,-0.0010585785,-0.040161133,-0.025344849,-0.0031776428,-0.032409668,0.03189087,-0.026794434,0.034576416,0.0473938,-0.008155823,0.03277588,0.041656494,0.033477783,0.010688782,0.011016846,-0.009567261,0.014801025,-0.017807007,0.014213562,0.013496399,0.053466797,-0.022399902,0.02357483,0.0015869141,0.023422241,-0.024978638,0.032043457,0.066711426,0.029144287,-0.0050315857,0.03326416,-0.0066871643,-0.016403198,-0.011512756,-0.010475159,0.056488037,0.0026454926,0.052612305,0.022491455,0.013809204,-0.017349243,0.027542114,-0.009002686,-0.030715942,0.0413208,0.026489258,-0.010192871,-0.0007529259,-0.012992859,0.0063591003,-0.05404663,-0.0335083,0.019210815,0.0058135986,0.0075187683,-0.0009851456,-0.0042877197,-0.018539429,0.024536133,0.019515991,0.012397766,-0.0030345917,0.030395508,0.01977539,0.008125305,0.015426636,0.005794525,0.026031494,-0.027923584,-0.014465332,0.009170532,0.020980835,0.007572174,-0.0030136108,0.024429321,0.018310547,0.052124023,0.03375244,-0.012123108,-0.010978699,0.032409668,0.01423645,0.007106781,0.039642334,0.025039673,0.004627228,0.036987305,0.0395813,0.0158844,-0.021072388,0.016525269,-0.018692017,0.014945984,0.0040245056,-0.020080566,0.010017395,-0.0056495667,0.011734009,0.016540527,-0.013427734,0.03479004,0.03164673,-0.009140015,0.007820129,0.0056610107,0.010520935,-0.005027771,0.0050811768,0.01725769,-0.016342163,0.023834229,0.01789856,0.041168213,-0.020965576,0.042175293,-0.0015478134,-0.008842468,0.002620697,0.013008118,-0.028457642,0.0010490417,-0.005882263,-0.0032653809,-0.040130615,0.008613586,0.016799927,-0.010887146,0.02470398,0.003622055,0.0022621155,-0.001914978,0.034118652,0.01612854,-0.021911621,-0.0090789795,-0.022720337,0.035491943,0.034729004,-0.004055023,-0.002002716,-0.020111084,0.0062408447,0.010528564,-0.0018062592,-0.005672455,-0.0024776459,-0.016189575,-0.04699707,0.013679504,0.046813965,0.016967773,0.03277588,-0.003692627,-0.011642456,-0.0024166107,0.033721924,0.010810852,-0.019378662,-0.01777649,0.02067566,-0.01777649,0.05178833,0.033691406,-0.0017433167,0.022918701,-0.015235901,-0.025634766,0.0020065308,-0.019165039,0.016204834,-0.013328552,0.007270813,-0.028137207,0.02319336,-0.023895264,-0.04019165,0.0057411194,-0.023040771,-0.0087509155,-0.024963379,0.0154418945,0.009773254,0.025985718,0.03074646,0.016174316,-0.022201538,0.06262207,-0.011749268,0.040008545,-0.018188477,0.0019798279,0.0491333,0.038909912,0.04095459,0.021484375,0.0143585205,-0.02507019,0.009849548,0.0385437,0.020721436,0.023330688,-0.009117126,-0.011795044,0.040405273,-0.005886078,0.020477295,-0.010307312,-0.009056091,0.013801575,-0.007118225,-0.0035896301,-0.0006546974,-0.015182495,0.02130127,0.044708252,-0.024230957,-0.004886627,-0.017410278,-0.010246277,0.044006348,0.0038757324,0.0041618347,0.005722046,-0.011955261,0.015304565,-0.037597656,-0.00756073,0.0016918182,0.030395508,-0.03640747,-0.019515991,0.015533447,0.015182495,-0.033813477,0.02027893,0.016662598,-0.0034561157,0.022476196,0.046142578,-0.0016889572,0.054992676,-0.01626587,0.023529053,0.042419434,0.0029621124,-0.01373291,0.015586853,0.013999939,-0.024765015,0.01802063,0.03579712,-0.008804321,0.010444641,0.0027809143,-0.013084412,0.012916565,0.01259613,-0.004737854,-0.007671356,-0.014427185,-0.017532349,0.013061523,0.01725769,0.006122589,0.009750366,0.003944397,-0.019058228,0.0031490326,0.04147339,0.013946533,-0.041625977,0.0077323914,0.007896423,0.015625,-0.035339355,-0.015319824,-0.016448975,-0.024505615,0.009773254,0.024230957,-0.0012569427,0.008644104,-0.024230957,-0.004890442,0.03213501,0.011695862,0.022979736,-0.0028839111,0.0013513565,0.019760132,-0.022628784,0.00415802,-0.014755249,0.0016450882,0.0075187683,0.010322571,-0.0099105835,-0.03050232,0.01612854,-0.0032997131,0.014198303,0.012542725,-0.012374878,0.028793335,-0.02609253,-0.0056915283,-0.0033569336,0.013824463,-0.012901306,-0.02684021,-0.028137207,0.024963379,0.058502197,-0.026687622,-0.00617218,0.0050086975,0.022644043,0.03060913,0.01600647,0.0027999878,0.045928955,0.035369873,-0.008483887,-0.04296875,0.013969421,-0.0066490173,-0.02999878,0.023330688,-0.014663696,-0.016815186,0.022781372,0.01222229,0.0031147003,-0.036743164,-0.019439697,-0.010910034,-0.01876831,0.026367188,-0.023620605,-0.0028953552,-0.031066895,-0.007686615,0.0068473816,-0.014480591,-0.016952515,-0.03491211,-0.006767273,-0.018630981,-0.04925537,0.020126343,-0.025650024,0.016204834,-0.026809692,0.0018749237,-0.0071525574,0.035491943,0.0045394897,0.010055542,0.014854431,0.025848389,0.0008087158,0.013015747,0.019241333,-0.019485474,-0.03302002,-0.008155823,-0.01550293,-0.012550354,0.0070724487,-0.020217896,0.03842163,0.014785767,0.0028877258,-0.0052337646,-0.008934021,-0.0071258545,0.0006132126,-0.030044556,-0.011077881,0.0119018555,0.022598267,-0.0053367615,-0.009170532,0.031982422,-0.017532349,-0.011260986,0.021011353,0.040039062,0.013450623,0.037872314,-0.009857178,-0.019577026,-0.018829346,-0.007633209,-0.010635376,0.015182495,0.016403198,0.008270264,-0.015731812,0.009109497,0.020751953,-0.0061149597,-0.0073127747,0.021881104,-0.000374794,-0.014373779,0.037719727,0.020950317,0.0012378693,-0.013626099,-0.027786255,0.032043457,0.03842163,0.0070533752,0.008331299,0.008407593,0.0046844482,-0.01737976,0.011795044,0.01687622,-0.013748169,-0.028793335,-0.008277893,-0.024108887,0.024368286,-0.0020332336,0.00982666,0.0067749023,0.021011353,-0.016281128,-0.018600464,-0.015701294,0.023376465,0.00064754486,-0.016235352,0.0009589195,0.004272461,0.014343262,-0.03363037,0.0034103394,-0.039733887,-0.016403198,-0.018035889,-0.03125,0.017105103,0.012619019,-0.007850647,0.0057411194,-0.00013256073,-0.0074272156,0.0025596619,0.027755737,-0.016784668,-0.0015716553,0.02281189,0.009986877,-0.023239136,0.017913818,-0.016342163,-0.012588501,0.022903442,-0.0048942566,0.018005371,-0.016479492,0.03463745,0.012023926,-0.021499634,0.018829346,-0.0048561096,0.018203735,-0.024734497,0.0056762695,-0.0048179626,0.0044136047,0.014076233,-0.01663208,-0.023910522,0.008041382,-0.01939392,-0.048095703,0.014961243,0.037994385,0.033966064,-0.022827148,0.033966064,-0.016525269,-0.014381409,0.009902954,0.0062789917,-0.023223877,0.0006489754,0.04953003,-0.0031490326,0.0022907257,0.006210327,-0.015777588,-0.02999878,-0.00409317,0.007286072,-0.010215759,0.002298355,0.029754639,0.020065308,0.04168701,0.00920105,0.02999878,0.022842407,0.00818634,0.026565552,0.009513855,0.050598145,0.011199951,-0.022537231,0.008163452,0.015449524,-0.025604248,-0.0061683655,-0.0073509216,-0.0021381378,-0.035705566,0.009666443,0.0031700134,0.029281616,-0.013931274,0.015182495,-0.014053345,-0.0035762787,-0.031921387,-0.002117157,-0.025390625,0.016326904,0.034118652,0.015930176,0.0044403076,-0.0010843277,-0.017578125,0.017852783,0.04559326,-0.004211426,-0.034698486,0.0007362366,0.009376526,0.0040245056,-0.0041542053,-0.0011253357,-0.030181885,-0.006576538,-0.0049324036,-0.0132369995,-0.00617218,-0.013809204,0.023803711,0.0029239655,-0.0041007996,-0.005508423,0.025390625,0.0015525818,0.0045928955,0.014663696,-0.010269165,0.024856567,0.03036499,-0.012496948,0.0178833,0.03173828,-0.03515625,0.037475586,-0.009033203,0.02520752,-0.024261475,0.011680603,-0.049591064,-0.010688782,-0.012062073,0.0046844482],"createdAt":"2026-04-18T18:31:53.628Z","updatedAt":"2026-04-23T05:00:37.086Z","lastSeenAt":"2026-04-23T05:00:37.086Z","tsv":"'/api/endpoint-45':32,139 '/api/v1':159 '/api/v2':161 '0.02':104,115 '000':93 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':86 '20':92 '6':98 'Base network API' 'USDC API' 'accept':66,209 'access':64,133 'across':118 'actual':190,229 'advertis':109 'agent':239 'ai/ml':51 'amount':90 'analyt':50 'api':5,19,46,63,124,152 'appear':146 'application/json':70 'base':8,22,81 'base-network' 'behind':138 'capabl':191 'catalog':153 'challeng':196 'confirm':203 'connect':173 'content':179 'contract':85 'crawl':163 'data':49 'decim':99 'descript':224 'detail':184 'discoveri':237 'doc':164 'document':142,181 'endpoint':6,20,30,47,59,121,188,205,228 'equat':102 'exampl':220 'finance/web3':53 'form':202 'function':137 'gate':3,17,45,212 'handl':74 'howev':134 'infer':52 'infrastructur':55 'input/output':218 'instant':132 'json-response' 'key':125 'label':61 'lack':216 'like':158 'limit':128,232 'list':151 'live':198 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':89 'micropayment API' 'minimum':130 'model':113 'network':82 'offer':39 'oper':207 'page':168 'paid endpoint' 'part':34 'particular':187 'path':157 'pay':10,24 'pay-per-request':9,23 'payload':221 'payment':72,211 'payment-g':210 'per':11,25,105,116 'platform':38,108 'post':67 'post-method' 'premium':4,18,62 'premium API' 'price':112,165 'programmat':236 'prompt':175 'protocol':78 'rate':127 'readm':167 'remain':192 'represent':100 'request':12,26,68,106,117,213 'respons':71 'return':69,170 'schema':183,219 'signific':231 'simpl':111 'site':149 'span':48 'specif':58,136 'substant':178 'unit':94 'unknown':193 'usdc':14,28,84,96 'usdc-payment' 'use':83,155,234 'util':56 'varieti':41 'version':156 'via':75 'wallet':174 'well':201 'well-form':200 'without':180 'x402':2,16,44,77,195 'x402 API' 'x402-gated':1,15,43 'x402-payment'","prices":[{"id":"4438f1cb-50ac-4d4a-b901-670ab364225b","listingId":"a78854f3-3544-4824-811d-927a3cc40945","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/endpoint-45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:53.628Z"}],"sources":[{"listingId":"a78854f3-3544-4824-811d-927a3cc40945","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:53.628Z","lastSeenAt":"2026-04-23T05:00:37.086Z"}],"details":{"listingId":"a78854f3-3544-4824-811d-927a3cc40945","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-45\n# Returns 402 with x402 payment challenge\n# Include X-PAYMENT header with valid USDC payment on Base to access","exampleRequest":null,"exampleResponse":{"error":"X-PAYMENT header is required","accepts":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/endpoint-45","description":"Premium API Access","maxAmountRequired":"20000","maxTimeoutSeconds":300}],"x402Version":1},"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Platform charges $0.02 per request with no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge is live with maxAmountRequired of 20000 USDC units on Base network","source_url":"https://lowpaymentfee.com/api/endpoint-45"},{"claim":"Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/endpoint-45"}],"useCases":["Accessing a pay-per-request API endpoint without needing API keys or subscriptions","Making micropayment-gated API calls using USDC on Base","Programmatic agent purchasing of API access via x402 protocol"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can handle x402 payment challenges on Base","Users who want keyless, pay-as-you-go API access"],"notFor":["Users who need documented input/output schemas before calling an endpoint","Production workloads requiring SLA guarantees or detailed documentation","Anyone needing free or non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:01.387Z"},"updatedAt":"2026-04-23T05:00:37.086Z"}}