{"id":"47d11084-9673-4d77-9627-14f0733bc329","shortId":"zDCAbZ","kind":"x402","title":"x402-gated email data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated email data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/66`) gated behind the x402 payment protocol. The endpoint returns a 402 Payment Required challenge requesting USDC payment on the Base network. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is settled on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`).\n\nThe broader lowpaymentfee.com platform advertises a wide range of x402-gated API endpoints across categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. The specific `/api/v1/emails/66` endpoint is not listed on the homepage's catalog, so its exact functionality is unclear. It accepts HTTP POST requests and returns `application/json`. No OpenAPI schema, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no substantive content.\n\nThe platform's value proposition is simple pay-per-use access with no API keys, no rate limits, and no commitments. However, the lack of documentation for this specific endpoint and the absence of any response schema make it difficult to know exactly what data is returned. Use with caution until more documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","email-data","json-response","no-api-key","http-post"],"categories":["data"],"synonyms":["email API","x402 email endpoint","pay-per-call email","USDC gated API","lowpaymentfee email","Base network API","micropayment email"],"warnings":["The /api/v1/emails/66 endpoint is not listed in the provider's own homepage catalog — its exact purpose is unknown.","No documentation, OpenAPI spec, or response schema is available; docs/pricing/API pages only show a 'Connect wallet' prompt.","The email-related nature of this endpoint is inferred solely from the URL path; actual returned data is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/emails/66","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/emails/66","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the specific purpose of /api/v1/emails/66 is not explained anywhere in the crawled content. 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":"2026-04-21T19:22:24.381Z","embedding":[-0.01071167,-0.0035514832,0.05645752,0.020904541,0.02784729,-0.03845215,-0.02758789,0.026306152,0.06378174,-0.06964111,0.028900146,-0.03765869,-0.0519104,-0.03253174,-0.039916992,0.0025119781,0.0018091202,-0.02281189,-0.041290283,0.025680542,0.044647217,-0.015823364,-0.013618469,0.0385437,-0.01084137,0.0067443848,-0.008010864,0.00059890747,0.0043029785,-0.041625977,0.005290985,-0.032287598,-0.0119018555,0.006046295,-0.0070877075,0.035308838,-0.007858276,0.058776855,0.022094727,0.006603241,0.0034866333,-0.04446411,0.0143966675,0.003791809,-0.028518677,-0.020477295,0.012458801,-0.033996582,0.0050964355,-0.0077667236,-0.015640259,-0.005542755,-0.017227173,0.015975952,0.015655518,0.034942627,0.0069351196,-0.019821167,-0.004611969,0.040008545,-0.0042915344,-0.076171875,-0.024520874,-0.010696411,0.020431519,0.041870117,-0.008834839,0.03552246,0.012107849,0.10247803,0.02041626,0.05670166,0.059936523,0.008964539,-0.0040359497,-0.030975342,0.003955841,0.011520386,-0.035369873,-0.030303955,-0.025650024,-0.021850586,-0.047729492,-0.023483276,-0.020645142,-0.0619812,-0.014472961,0.02607727,-0.026519775,0.036010742,-0.0993042,-0.010787964,-0.01637268,0.0146102905,-0.0095825195,0.0023479462,-0.011116028,-0.0047302246,0.016601562,0.011878967,0.010688782,-0.04244995,0.020065308,0.018661499,0.051574707,0.021377563,0.015960693,0.0234375,0.020339966,-0.012519836,-0.018447876,-0.0054893494,-0.02909851,-0.004096985,0.01637268,-0.012161255,-0.016616821,0.026290894,-0.026290894,0.03677368,-0.0395813,0.048736572,0.0036373138,-0.004962921,0.00484848,-0.037902832,-0.0289917,-0.012191772,-0.023147583,0.0029907227,0.04727173,0.009284973,0.04525757,-0.026138306,-0.028411865,0.026489258,-0.007167816,-0.016601562,-0.057525635,-0.0020217896,0.04864502,-0.027053833,0.012786865,0.03829956,-0.08483887,-0.0044898987,-0.03967285,0.011405945,-0.02003479,0.009063721,0.013435364,0.020233154,0.007698059,-0.022354126,-0.030654907,-0.023986816,-0.0037879944,0.042541504,-0.0026855469,0.017959595,-0.013587952,0.013465881,0.03579712,-0.007019043,0.008979797,0.041015625,0.0048599243,-0.0791626,-0.05456543,-0.020584106,-0.008964539,-0.010299683,-0.033172607,0.023757935,-0.02015686,-0.056762695,-0.015075684,-0.003622055,0.0062942505,-0.043151855,-0.010604858,-0.03173828,-0.014320374,0.0027275085,-0.07373047,-0.022399902,-0.0064735413,0.0670166,0.0034332275,0.0107803345,0.022506714,-0.0112838745,0.046691895,0.038269043,-0.025161743,-0.030181885,0.018463135,-0.022720337,0.030944824,0.022567749,0.024459839,-0.034729004,0.024215698,0.039245605,-0.0039978027,-0.020355225,0.010131836,-0.043701172,-0.029464722,-0.009613037,0.023117065,-0.001376152,-0.022750854,0.017120361,-0.03060913,-0.039916992,-0.003835678,-0.010543823,0.021957397,0.053649902,0.007701874,0.019119263,-0.0010280609,0.030014038,-0.036346436,0.030914307,0.038116455,0.015823364,-0.022155762,-0.02218628,0.023788452,0.03564453,-0.012237549,0.0018491745,-0.017486572,0.013412476,-0.012138367,-0.0066719055,0.024246216,0.007331848,-0.022460938,-0.034820557,-0.010810852,0.022460938,-0.007835388,-0.03704834,-0.048736572,-0.045318604,0.047912598,0.06738281,0.018249512,0.00818634,0.008514404,-0.038482666,-0.023101807,-0.06994629,0.04736328,0.07019043,-0.0044136047,-0.021652222,0.045318604,-0.011711121,-0.018417358,0.008255005,-0.0035762787,-0.029312134,-0.013069153,-0.006904602,-0.04559326,0.022033691,0.009429932,0.04043579,0.054626465,-0.014572144,-0.045928955,-0.00032901764,0.009651184,-0.007587433,-0.020492554,-0.011917114,-0.0029697418,0.0045776367,0.019897461,-0.034210205,0.018554688,0.009117126,0.0259552,-0.003276825,0.0054130554,-0.03552246,-0.024780273,0.012489319,0.006931305,-0.053222656,0.0024223328,0.0030994415,0.052734375,-0.042388916,0.03656006,-0.015838623,-0.003435135,0.060302734,-0.0090789795,-0.05419922,-0.021209717,0.018157959,0.040496826,0.06414795,0.01852417,0.03314209,-0.018356323,0.05734253,-0.010604858,0.008972168,-0.00068187714,0.045654297,0.017333984,0.034973145,-0.05291748,-0.059173584,-0.008682251,0.00096845627,0.028305054,-0.048797607,0.025344849,0.00818634,0.009971619,-0.015808105,-0.0085372925,-0.043121338,-0.004234314,-0.03012085,-0.013679504,-0.027557373,-0.0019102097,0.02128601,0.011711121,0.015899658,-0.0072746277,0.026931763,0.00015211105,-0.0019798279,-0.02281189,-0.030685425,-0.03302002,-0.013885498,-0.0075263977,0.024658203,0.012268066,0.025939941,-0.057037354,0.028717041,0.037872314,0.015548706,0.028045654,-0.011985779,0.025222778,-0.07019043,-0.032470703,-0.018753052,-0.012107849,0.03894043,0.032165527,0.0143585205,0.059692383,0.0001322031,-0.026824951,-0.05303955,0.045776367,-0.040100098,0.005306244,0.039123535,-0.022521973,-0.01914978,0.017654419,0.0015640259,0.011306763,0.039245605,0.025497437,0.03213501,0.074157715,0.04260254,-0.0016260147,-0.020095825,0.036743164,0.017059326,-0.024520874,-0.00459671,-0.018218994,-0.026168823,0.030532837,-0.0026988983,-0.018814087,-0.07330322,0.057281494,0.041625977,0.069885254,0.019317627,0.024475098,0.009819031,-0.014190674,0.009170532,-0.014450073,-0.022262573,-0.023986816,-0.06518555,0.01789856,-0.00806427,0.010322571,-0.03366089,0.016067505,0.0042648315,-0.004058838,-0.012908936,0.05227661,-0.015853882,-0.00091028214,0.029022217,0.011421204,0.031677246,0.041625977,-0.05130005,0.026306152,0.025436401,-0.017623901,-0.009986877,0.012649536,0.0068206787,-0.02520752,-0.06274414,-0.04055786,-0.02758789,-0.04333496,-0.06036377,-0.0116119385,-0.005115509,0.027664185,0.0309906,-0.013641357,-0.037902832,0.004737854,-0.007095337,-0.060150146,0.0068588257,-0.049621582,0.020812988,0.045532227,-0.02281189,0.009719849,-0.008972168,-0.008628845,0.0022735596,0.012901306,-0.025039673,-0.006046295,-0.024963379,0.0051460266,-0.011367798,0.017837524,0.0056991577,0.034423828,0.012954712,0.03414917,0.02331543,-0.0062408447,-0.020568848,-0.046783447,0.02180481,-0.04269409,0.022247314,0.02456665,-0.013221741,0.009544373,-0.011955261,-0.017501831,-0.015701294,0.026168823,-0.04434204,-0.019134521,0.033813477,-0.029663086,-0.023727417,-0.050994873,-0.041168213,-0.007423401,0.046325684,0.022277832,-0.013114929,-0.040771484,-0.020645142,0.014984131,-0.0010089874,0.021194458,-0.01398468,-0.01940918,-0.008804321,-0.02861023,-0.048461914,-0.0066490173,0.03387451,-0.012313843,-0.03466797,0.0017271042,-0.018844604,0.031921387,0.020736694,0.0021896362,0.034484863,-0.02720642,-0.0058403015,-0.0075950623,0.042633057,0.010307312,-0.019256592,-0.037353516,0.03314209,-0.001241684,0.046844482,-0.03463745,-0.0047073364,-0.01398468,0.0340271,0.0063552856,-0.009895325,-0.0028476715,-0.009223938,-0.020935059,-0.10345459,0.034820557,-0.008987427,0.016174316,-0.000039756298,0.016448975,0.04107666,-0.0053367615,-0.012863159,0.021942139,-0.047607422,-0.034973145,-0.022460938,-0.013587952,-0.013908386,0.0028038025,-0.010467529,0.021942139,0.003435135,0.0262146,0.004207611,-0.022445679,0.033325195,0.010848999,0.009468079,0.039764404,-0.0021686554,-0.00258255,0.037139893,0.012779236,-0.029220581,0.02368164,-0.004753113,0.02822876,0.0025024414,0.049072266,0.041503906,-0.01134491,0.0012397766,0.0014162064,0.00034451485,-0.026519775,0.005519867,0.022506714,0.045074463,0.008422852,-0.031463623,0.0135269165,0.027389526,-0.030944824,-0.019943237,0.008262634,0.029708862,-0.045043945,0.0073127747,0.013618469,0.03930664,-0.02619934,0.0003464222,0.020507812,0.0446167,0.024475098,0.009346008,0.00381279,0.01374054,0.0009889603,-0.01335907,0.008781433,-0.014335632,0.000056266785,-0.00894928,0.013397217,0.023635864,0.00283432,-0.018051147,-0.030761719,-0.011100769,0.020187378,-0.012435913,0.03427124,0.027328491,0.037231445,-0.019012451,0.033233643,0.030151367,-0.037200928,0.004043579,-0.0047912598,0.033172607,0.0020942688,-0.0055236816,0.01676941,0.01991272,0.02772522,-0.060668945,-0.014076233,0.0032176971,0.034820557,-0.029846191,-0.043548584,-0.04055786,-0.025131226,0.022735596,-0.0063095093,-0.014320374,0.02835083,-0.025970459,0.0074806213,0.009422302,0.012939453,-0.0070266724,-0.003376007,-0.044006348,-0.014717102,-0.005302429,0.0072746277,-0.021118164,0.0064353943,-0.02609253,-0.02748108,-0.004512787,-0.034057617,0.007698059,-0.006549835,0.00067806244,0.03540039,-0.015670776,0.022476196,-0.019042969,-0.0418396,0.000059127808,0.010810852,0.030426025,-0.03515625,0.007247925,-0.013679504,-0.0043754578,-0.0038490295,0.00091028214,0.022354126,0.012939453,0.0049858093,0.027404785,-0.050231934,0.042419434,-0.013267517,0.0016288757,-0.023208618,-0.030761719,-0.028427124,-0.022491455,0.00040841103,0.039245605,-0.027435303,-0.015823364,-0.026443481,-0.04977417,-0.017471313,-0.05810547,0.014732361,0.00617218,0.025466919,-0.025939941,0.01234436,0.017456055,0.0074539185,-0.0068511963,-0.012763977,0.00087833405,0.024154663,0.040130615,-0.0022945404,-0.04473877,-0.028564453,-0.009727478,-0.004852295,-0.022033691,-0.034057617,-0.017623901,-0.013153076,-0.0051841736,0.0001502037,-0.010154724,-0.023345947,-0.010765076,-0.03878784,0.033081055,-0.008575439,0.0049591064,0.0054779053,-0.046691895,0.0017576218,0.009864807,-0.025619507,0.016220093,-0.0059318542,-0.014961243,-0.030975342,0.0043640137,0.01977539,0.010292053,-0.0055503845,-0.038909912,0.0077552795,-0.014984131,-0.05810547,-0.0035133362,-0.022201538,0.005344391,-0.004600525,-0.0067367554,-0.051116943,0.0037174225,-0.008010864,0.0019464493,0.017501831,0.02041626,-0.004928589,-0.0095825195,0.018692017,-0.0055389404,-0.014625549,-0.045410156,0.018432617,0.010124207,-0.022460938,0.032958984,0.036254883,-0.0016765594,-0.014022827,0.009979248,-0.008346558,0.0019950867,-0.012161255,0.025817871,-0.018951416,0.012802124,0.013259888,-0.032196045,-0.02784729,-0.0065574646,0.06768799,0.0040740967,0.004852295,0.002483368,-0.017166138,0.003736496,0.040130615,-0.028411865,0.005115509,-0.029174805,0.016845703,-0.008262634,0.030731201,0.00198555,0.020401001,-0.020614624,-0.053588867,-0.008270264,0.00063943863,-0.001613617,-0.054626465,-0.035461426,-0.035827637,0.015777588,-0.02255249,-0.0014476776,0.00093889236,0.008300781,-0.022247314,-0.07476807,0.007701874,0.058135986,-0.00095558167,0.018157959,-0.018554688,0.019119263,0.027801514,-0.005027771,-0.0063705444,0.016616821,-0.029556274,-0.011993408,-0.028640747,0.041046143,-0.0022907257,-0.024337769,0.024673462,0.002166748,0.015991211,-0.017807007,0.024734497,-0.025756836,-0.027023315,-0.012924194,-0.0013332367,-0.01574707,-0.0011329651,0.028335571,-0.032073975,0.033721924,-0.022384644,-0.0014038086,-0.013343811,0.011734009,0.037139893,-0.03427124,-0.002658844,0.012565613,-0.0010290146,0.041229248,-0.03164673,0.038482666,0.017807007,-0.016067505,0.013504028,-0.021972656,-0.038635254,-0.02796936,-0.012786865,0.028793335,0.022460938,0.014373779,-0.016296387,-0.0015764236,0.0049552917,0.010101318,0.0033454895,-0.00026082993,-0.01638794,-0.029312134,0.0047302246,0.007949829,0.02015686,0.008071899,0.01171875,0.029205322,0.04196167,-0.024383545,-0.021316528,-0.0037403107,0.025665283,0.004512787,-0.0061950684,0.0049705505,0.01864624,0.012710571,0.019638062,0.009506226,-0.026794434,-0.025131226,-0.013130188,-0.031677246,0.004055023,0.0057754517,0.028411865,0.010360718,0.009033203,-0.013381958,-0.031066895,-0.0011920929,-0.036102295,-0.019210815,0.0014247894,-0.0020065308,0.021362305,0.00995636,0.007385254,0.01638794,0.000009059906,0.02748108,0.012321472,-0.011161804,0.025131226,0.037872314,-0.0050468445,-0.031341553,-0.0104904175,-0.00995636,-0.014816284,0.003730774,-0.0074806213,0.014717102,0.040283203,-0.01637268,0.02571106,0.008522034,0.01914978,-0.009429932,0.010848999,-0.006679535,0.015319824,0.005634308,0.02935791,-0.048187256,0.026062012,0.025817871,0.002571106,-0.011039734,-0.01499939,-0.022720337,0.02130127,0.018310547,-0.01184082,0.037017822,-0.01626587,0.026672363,-0.017501831,-0.009254456,0.012191772,-0.018203735,-0.03274536,0.034118652,-0.009063721,-0.0009841919,0.0048980713,-0.02067566,0.046295166,-0.025680542,0.006324768,0.0013055801,-0.010284424,-0.012191772,-0.020904541,0.01676941,-0.034820557,-0.027435303,-0.0016345978,-0.015548706,0.05319214,0.04324341,0.021057129,0.023254395,0.0076141357,-0.005935669,-0.053741455,-0.04663086,0.020904541,-0.021652222,0.03060913,-0.02671814,0.03479004,0.040252686,0.011207581,0.030258179,0.026000977,0.02229309,-0.0060653687,0.01171875,-0.021957397,0.018051147,-0.028121948,0.0075035095,0.002254486,0.045806885,-0.03265381,0.0016584396,-0.009132385,0.032287598,-0.017486572,0.011222839,0.07110596,0.017669678,-0.004299164,0.026412964,-0.005092621,-0.029815674,0.004512787,-0.02027893,0.05105591,0.0154953,0.027694702,0.036315918,0.012863159,-0.0046539307,0.03479004,-0.028839111,-0.01449585,0.022003174,0.02229309,-0.013145447,0.0043144226,-0.015281677,0.004550934,-0.056243896,-0.022277832,0.015823364,0.011703491,0.017028809,-0.00843811,-0.008140564,-0.00072288513,0.03353882,0.0002720356,0.016571045,0.0012607574,0.0025920868,0.027053833,0.006538391,0.04498291,-0.0019273758,0.010444641,-0.022201538,-0.0309906,0.0069351196,-0.007911682,-0.008758545,-0.009017944,0.027313232,0.027160645,0.04067993,0.03555298,-0.0211792,0.00008332729,0.025100708,0.008338928,0.008308411,0.03152466,0.018234253,-0.003774643,0.026260376,0.03451538,0.025848389,0.002588272,0.017913818,0.002336502,-0.0069885254,0.01285553,-0.0012817383,0.006450653,-0.002161026,0.0034046173,-0.014205933,-0.010787964,0.02659607,0.02645874,0.0058670044,0.0044517517,0.012290955,-0.00016701221,0.008666992,0.019470215,0.008407593,-0.013435364,0.04067993,0.018966675,0.043792725,0.00042200089,0.026855469,-0.0031280518,-0.009735107,-0.020202637,0.021362305,-0.04336548,0.013259888,-0.004085541,-0.011367798,-0.028045654,0.01676941,0.011199951,-0.01725769,0.033294678,0.012550354,-0.017990112,0.0007300377,0.02746582,0.030380249,-0.017700195,0.0011386871,-0.01979065,0.0234375,0.057525635,0.019454956,-0.014640808,-0.02909851,0.0018892288,0.015060425,0.0015392303,-0.0073127747,-0.0054779053,-0.0033302307,-0.040374756,0.034973145,0.025970459,0.016464233,0.042755127,-0.010871887,-0.019485474,0.0021209717,0.012031555,0.0098724365,-0.014434814,-0.012069702,0.023452759,-0.0061416626,0.034576416,0.037384033,0.0071487427,0.017501831,-0.008293152,0.0032482147,-0.00084781647,-0.025924683,0.012496948,-0.016921997,0.00069999695,-0.01637268,0.03189087,-0.017532349,-0.013946533,-0.006713867,-0.01890564,-0.021530151,-0.019622803,0.011207581,0.020263672,0.029586792,0.027923584,0.026443481,-0.022994995,0.062927246,-0.023864746,0.044006348,-0.00932312,-0.006088257,0.06591797,0.041534424,0.040893555,0.0017023087,0.016845703,-0.02796936,-0.0051841736,0.035308838,0.02116394,0.01499939,-0.004749298,-0.023071289,0.044799805,-0.009223938,0.019470215,-0.027801514,0.0011453629,0.014572144,-0.015037537,-0.026443481,-0.00029277802,0.0011110306,0.001958847,0.04434204,-0.02709961,-0.01902771,-0.020339966,-0.014511108,0.02810669,-0.018920898,-0.013465881,-0.005256653,-0.02444458,0.009269714,0.000916481,-0.02003479,0.014053345,0.030944824,-0.032714844,-0.0061531067,-0.0017051697,0.027359009,-0.027435303,0.03387451,0.020721436,0.002664566,0.0019798279,0.04196167,-0.0056114197,0.042022705,-0.020446777,0.035064697,0.04650879,-0.0037841797,-0.011245728,0.015342712,0.018157959,-0.023498535,0.023544312,0.041809082,0.0031547546,0.012512207,0.00982666,-0.005519867,-0.0011777878,0.013885498,-0.021850586,0.0051078796,-0.013656616,-0.028076172,0.002664566,0.015174866,-0.0024204254,0.00089359283,0.00004643202,-0.005836487,0.001996994,0.036254883,0.015525818,-0.039886475,-0.0058250427,0.00092697144,0.010726929,-0.023788452,-0.0236969,0.00054979324,-0.052124023,0.018920898,0.02859497,-0.0012426376,0.005302429,-0.024230957,0.003326416,0.033477783,0.019577026,0.02218628,0.00881958,-0.0020961761,0.016433716,-0.010017395,-0.0042152405,-0.01789856,-0.0129470825,0.0056114197,0.028305054,-0.020370483,-0.030410767,0.011741638,-0.014770508,0.0036849976,0.00019168854,0.004371643,0.048431396,0.0022449493,0.004749298,-0.0023269653,0.010047913,-0.018356323,-0.034820557,-0.03353882,0.008422852,0.05532837,-0.01121521,-0.01083374,0.0107421875,0.044311523,0.014656067,0.029312134,-0.0027313232,0.04748535,0.022476196,0.0013198853,-0.04534912,0.007167816,-0.027801514,-0.026138306,0.027542114,-0.04067993,-0.018829346,0.012786865,-0.005443573,-0.009185791,-0.023529053,0.0017328262,-0.018539429,-0.03491211,0.036254883,-0.015449524,0.004383087,-0.042388916,-0.003414154,0.020187378,-0.020141602,-0.041534424,-0.0048294067,-0.005847931,-0.015609741,-0.069885254,0.017532349,-0.027557373,0.0061569214,-0.01727295,0.012359619,-0.018600464,0.035003662,0.0010938644,0.0046577454,0.022888184,0.022201538,0.0070877075,0.009300232,0.028274536,-0.043518066,-0.03793335,-0.0039405823,-0.0030117035,-0.011566162,0.026947021,-0.0005311966,0.02168274,0.0011749268,-0.0073051453,0.004688263,0.002910614,-0.02407837,-0.010101318,-0.04220581,-0.032287598,0.0050354004,0.03390503,-0.011627197,0.0072669983,0.03894043,-0.006439209,-0.025558472,0.017318726,0.03314209,0.015777588,0.028717041,0.0014066696,-0.006023407,-0.015609741,-0.004749298,-0.024475098,0.0105896,0.0041160583,0.00087833405,-0.012290955,0.025344849,0.006515503,-0.016418457,0.016464233,0.017807007,0.013259888,-0.015991211,0.035705566,0.0079574585,0.000074505806,-0.013145447,-0.0044021606,0.011985779,0.042510986,0.008613586,0.021957397,0.002576828,0.0030174255,0.002653122,0.0011081696,0.0061035156,-0.023208618,-0.022720337,-0.030380249,-0.025482178,-0.007537842,-0.0035743713,0.014640808,-0.006263733,0.03149414,0.0023345947,-0.034179688,-0.0072288513,0.019989014,-0.00178051,-0.006511688,0.0105896,0.005859375,-0.007949829,-0.037139893,0.009765625,-0.06439209,-0.04257202,-0.012084961,-0.020065308,0.013298035,0.0012245178,-0.021362305,0.0070762634,0.001329422,-0.02003479,-0.009140015,0.022644043,-0.020019531,-0.0010538101,0.002336502,0.019821167,-0.011978149,0.016464233,-0.02204895,-0.0023536682,0.020187378,-0.018600464,0.030975342,-0.0021800995,0.01890564,0.0067253113,-0.021270752,0.007575989,-0.00919342,0.0009150505,-0.04425049,-0.0006599426,0.002532959,-0.02293396,0.008468628,-0.010231018,-0.032470703,-0.016281128,-0.0075569153,-0.030807495,0.018295288,0.031799316,0.032409668,0.01020813,0.041534424,-0.028152466,-0.013702393,-0.006877899,0.013183594,-0.036010742,-0.0011672974,0.020431519,0.0038108826,-0.012176514,-0.017166138,-0.0015983582,-0.02268982,-0.020355225,-0.0030288696,-0.014640808,-0.0045204163,0.0234375,0.031707764,0.03869629,0.006866455,0.010696411,0.022857666,0.0032482147,0.01928711,-0.005443573,0.046569824,-0.0022602081,-0.030563354,-0.006652832,0.005104065,-0.0074157715,-0.015625,-0.006542206,-0.0071907043,-0.047180176,0.008468628,-0.009643555,0.040039062,-0.0152282715,0.02746582,-0.015037537,-0.012397766,-0.029205322,-0.0022392273,-0.039001465,0.0050354004,0.047424316,0.023498535,0.0029239655,-0.01285553,-0.035827637,0.021530151,0.009048462,0.0063476562,-0.043395996,-0.023223877,0.009162903,-0.008407593,0.0060424805,0.019958496,-0.02671814,-0.015472412,0.004764557,0.0029296875,-0.008232117,-0.00025105476,0.009895325,0.0069084167,-0.01121521,0.0031814575,0.03567505,0.0004787445,-0.011497498,-0.008079529,-0.013397217,0.029205322,0.04135132,-0.01852417,0.011695862,0.025314331,-0.042907715,0.046325684,-0.020904541,0.009025574,-0.0135269165,0.0040740967,-0.026611328,-0.0011310577,-0.0003657341,-0.008918762],"createdAt":"2026-04-21T18:32:12.665Z","updatedAt":"2026-04-25T14:03:55.875Z","lastSeenAt":"2026-04-25T14:03:55.875Z","tsv":"'/api/v1/emails/66':44,132 '0.02':10,24,71,127 '000':73 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':89 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':96 '20':72 '402':55 '6':79 'Base network API' 'USDC gated API' 'absenc':219 'accept':149 'access':36,197 'across':111 'address':88 'advertis':101 'ai':116 'analyt':115 'api':35,109,173,200 'application/json':155 'avail':241 'base':8,22,64,74,95 'becom':240 'behind':46 'broader':98 'catalog':141 'categori':112 'caution':236 'chain':86 'challeng':58 'commit':207 'connect':179 'content':185 'contract':93 'cost':67 'crawl':168 'data':5,19,114,231 'decim':80 'detail':159 'difficult':226 'doc':170 'document':160,212,239 'email':4,18,40 'email API' 'email-data' 'email-rel':39 'endpoint':6,20,30,52,110,133,216 'exact':144,229 'exampl':162 'financ':119 'found':165 'function':145 'gate':3,17,45,108 'homepag':139 'howev':208 'http':150 'http-post' 'includ':113 'infrastructur':122 'json-response' 'key':201 'know':228 'lack':210 'learn':118 'limit':204 'list':136 'lowpaymentfee email' 'lowpaymentfee.com':32,99 'machin':117 'make':224 'micropayment email' 'network':65 'no-api-key' 'on-chain':84 'openapi':157 'page':174 'pay':9,23,194 'pay-per-call email' 'pay-per-request' 'pay-per-us':193 'payment':49,56,61,81 'per':11,25,68,128,195 'platform':100,187 'post':151 'premium':34 'price':125,171 'prompt':181 'proposit':190 'protocol':50 'provid':33 'rang':104 'rate':203 'relat':41 'render':176 'request':12,26,59,69,129,152 'requir':57 'resourc':42 'respons':163,222 'return':53,154,233 'schema':158,223 'settl':83 'simpl':192 'specif':43,131,215 'substant':184 'unclear':147 'unit':75 'usdc':14,28,60,77,92 'usdc-base' 'use':90,196,234 'util':123 'valu':189 'wallet':180 'web3':120 'wide':103 'x402':2,16,48,107 'x402 email endpoint' 'x402-gated':1,15,106 'x402-payment'","prices":[{"id":"ea1cdc78-4a9e-4d6a-b850-530178dc3f93","listingId":"47d11084-9673-4d77-9627-14f0733bc329","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/emails/66","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:12.665Z"}],"sources":[{"listingId":"47d11084-9673-4d77-9627-14f0733bc329","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/emails/66","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:12.665Z","lastSeenAt":"2026-04-25T14:03:55.875Z"}],"details":{"listingId":"47d11084-9673-4d77-9627-14f0733bc329","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/emails/66 \\\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":"The endpoint returns a 402 challenge requesting 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/emails/66"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/emails/66"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching email-related data on a per-request payment basis without needing an API key","Agent-driven workflows that need to retrieve specific email records programmatically","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment-gated APIs","AI agents that need keyless, pay-per-use data access on Base","Low-volume consumers who want no subscription commitments"],"notFor":["High-volume email processing where per-request costs add up","Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:20.379Z"},"updatedAt":"2026-04-25T14:03:55.875Z"}}