{"id":"e325cac1-c2a0-4ee2-9f23-d23338e92ad7","shortId":"6gjvKq","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 x402-protocol access to an email-related resource at `/api/v1/emails/88`. It is part of a broader platform offering dozens of pay-per-call API endpoints across categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/emails/88` is described only as \"Premium API Access\" with no further documentation about what data it returns or what input it expects. The x402 challenge confirms it accepts POST requests and charges up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header with a valid payment proof.\n\nThe platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content. As a result, the exact functionality of the `/api/v1/emails/88` endpoint is unclear. It may return email-related data (e.g., a specific email record or template), but this is speculative. The endpoint is confirmed live via a proper 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","email-data","post-endpoint"],"categories":["data","email"],"synonyms":["email API","premium email endpoint","x402 email","pay-per-call email","lowpaymentfee email","USDC email API","Base network API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The specific purpose of /api/v1/emails/88 is unknown; 'Premium API Access' is a generic label applied to many endpoints","No request or response schema is provided","The /api/v1/emails/88 path does not appear in the site's own listed endpoints, raising questions about its status"],"endpointUrl":"https://lowpaymentfee.com/api/v1/emails/88","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/88","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, but there is essentially no documentation about what /api/v1/emails/88 actually does or returns. No OpenAPI schema, no request/response examples, and all doc pages are empty. The endpoint's purpose must be guessed from the URL path alone.","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":"2026-04-21T19:24:37.719Z","embedding":[-0.011192322,-0.011253357,0.070251465,0.020858765,0.03668213,-0.03805542,-0.020553589,0.032043457,0.064208984,-0.075805664,0.033813477,-0.031021118,-0.05105591,-0.04473877,-0.051849365,0.0088272095,0.0034599304,-0.013511658,-0.044311523,0.030761719,0.05441284,-0.025360107,-0.016571045,0.041748047,0.0036792755,-0.0073013306,-0.028274536,0.0048675537,0.022918701,-0.045959473,0.01209259,-0.045806885,-0.017807007,0.012626648,-0.0034866333,0.029281616,-0.000538826,0.058410645,0.037475586,0.013870239,0.018630981,-0.04675293,-0.005088806,-0.0030956268,-0.03778076,-0.020187378,0.0054092407,-0.031173706,-0.0030879974,-0.003080368,-0.0068588257,0.0026893616,0.000934124,0.005279541,0.0053367615,0.02607727,0.0077934265,0.0070114136,-0.0033397675,0.030380249,-0.00844574,-0.076049805,-0.026275635,-0.023590088,0.017181396,0.04449463,-0.021575928,0.0390625,0.024291992,0.082214355,0.039093018,0.061279297,0.04345703,0.020736694,0.00043821335,-0.047088623,-0.0053901672,0.022872925,-0.019195557,-0.025436401,-0.023361206,-0.009170532,-0.03579712,-0.0051612854,-0.021453857,-0.043518066,-0.010108948,0.026245117,-0.024765015,0.030090332,-0.09265137,-0.003900528,0.0076789856,0.008224487,-0.004447937,-0.0015563965,-0.0078125,-0.0128479,-0.012573242,0.011238098,0.018615723,-0.043548584,0.017913818,0.0090408325,0.052856445,0.01939392,0.018539429,0.026000977,0.010505676,-0.025817871,-0.016860962,0.00969696,-0.01638794,-0.009742737,0.017349243,-0.0055999756,-0.010116577,0.006702423,-0.023452759,0.023864746,-0.027740479,0.048950195,-0.0027389526,-0.01159668,0.0065231323,-0.037994385,-0.028305054,-0.013267517,-0.017822266,0.013473511,0.03768921,0.01625061,0.059417725,-0.02909851,-0.02116394,0.0178833,-0.01260376,-0.018844604,-0.056243896,-0.016403198,0.0501709,-0.033416748,0.009849548,0.037506104,-0.0914917,-0.02230835,-0.041412354,0.01638794,-0.009796143,0.0016498566,0.0041770935,0.013519287,0.0023975372,-0.016830444,-0.025299072,-0.0065345764,0.0010156631,0.04626465,-0.0064697266,0.027664185,0.014930725,0.014038086,0.033599854,0.00093507767,0.017425537,0.034423828,0.009986877,-0.07739258,-0.060150146,-0.033721924,-0.005882263,0.002796173,-0.038909912,0.023803711,-0.00642395,-0.054595947,-0.012390137,0.0034484863,-0.005126953,-0.037841797,0.0051078796,-0.033416748,-0.0014429092,-0.0010499954,-0.07861328,-0.012748718,-0.00944519,0.052856445,0.011421204,-0.003145218,0.03765869,-0.01436615,0.04824829,0.027297974,-0.04244995,-0.031707764,0.021133423,-0.015945435,0.018157959,0.03173828,0.018310547,-0.026641846,0.0362854,0.06323242,0.00012540817,-0.0231781,0.029785156,-0.04046631,-0.047027588,-0.01725769,0.027435303,-0.008880615,-0.0036907196,0.012123108,-0.038024902,-0.046447754,-0.007286072,-0.0009531975,0.024414062,0.04486084,0.0017499924,0.009498596,0.0061302185,0.014205933,-0.016464233,0.040985107,0.042785645,0.033325195,-0.023834229,-0.013801575,0.0151901245,0.018066406,-0.0020275116,-0.0027656555,-0.020614624,0.014816284,-0.021484375,0.007293701,0.019744873,0.006942749,-0.019821167,-0.03050232,-0.0041770935,0.027557373,-0.0051460266,-0.028869629,-0.03869629,-0.049224854,0.053222656,0.07055664,0.014137268,-0.00083494186,0.0028495789,-0.036010742,-0.026885986,-0.08215332,0.030883789,0.062683105,-0.011932373,-0.017562866,0.037475586,-0.022216797,-0.020095825,0.0051574707,-0.007820129,-0.027633667,-0.00919342,-0.006549835,-0.05505371,-0.011856079,-0.0077171326,0.04232788,0.05407715,-0.0034770966,-0.051696777,-0.014968872,0.008460999,0.0046577454,-0.01335907,0.0027484894,0.001783371,0.030914307,0.019195557,-0.039855957,0.016616821,0.003490448,0.019897461,0.0046844482,0.009017944,-0.03994751,-0.02330017,0.0023555756,-0.00434494,-0.06335449,-0.0056114197,0.0037784576,0.048675537,-0.03060913,0.030883789,-0.01675415,-0.0054969788,0.050689697,-0.0029640198,-0.04916382,-0.022979736,0.010513306,0.042938232,0.07397461,0.017303467,0.012191772,-0.009231567,0.056854248,-0.007881165,-0.00060272217,0.00079631805,0.026641846,0.015945435,0.031143188,-0.060455322,-0.045562744,-0.0025634766,0.013458252,0.029769897,-0.029022217,0.024429321,0.0015907288,-0.0031528473,-0.012641907,-0.013664246,-0.03744507,-0.008392334,-0.023254395,-0.012565613,-0.033721924,0.008125305,0.017166138,-0.010139465,0.015670776,-0.012184143,0.027679443,-0.01247406,0.0014219284,-0.019180298,-0.027450562,-0.051940918,0.0014972687,-0.006839752,0.026794434,-0.005657196,0.023956299,-0.0625,0.024276733,0.029510498,0.020401001,0.02861023,-0.012580872,0.012321472,-0.06793213,-0.041229248,-0.016143799,0.00067186356,0.03353882,0.030334473,0.014122009,0.06707764,-0.0051460266,-0.037597656,-0.061828613,0.044830322,-0.035308838,0.004272461,0.05230713,-0.015991211,-0.029251099,0.026321411,-0.019378662,0.00090932846,0.04272461,0.016464233,0.04046631,0.06585693,0.058746338,-0.013282776,-0.018249512,0.038879395,0.019897461,-0.019897461,-0.023956299,-0.010192871,-0.034698486,0.032958984,0.0154953,-0.014434814,-0.0791626,0.047698975,0.053894043,0.06713867,0.030380249,0.02456665,0.029815674,-0.01285553,-0.0025234222,-0.010749817,-0.034210205,-0.00868988,-0.05569458,0.013153076,-0.013000488,0.0209198,-0.041107178,0.009597778,0.0027999878,0.018112183,-0.026397705,0.06097412,0.0027923584,0.0054473877,0.024429321,0.005153656,0.033416748,0.043121338,-0.048065186,0.0340271,0.030639648,-0.028121948,-0.018341064,0.02671814,-0.012916565,-0.017929077,-0.05859375,-0.04232788,-0.01121521,-0.030639648,-0.06213379,-0.0066223145,-0.015625,0.023834229,0.04525757,-0.019088745,-0.04244995,0.002822876,-0.0052986145,-0.056030273,-0.006034851,-0.033996582,0.03086853,0.029815674,-0.025680542,-0.009986877,0.00069475174,-0.012062073,0.0024280548,0.011314392,-0.019607544,-0.008491516,-0.038970947,0.005104065,0.0020618439,0.019332886,0.010681152,0.035736084,0.011802673,0.0440979,0.019012451,-0.0042800903,-0.026229858,-0.03567505,0.012550354,-0.03186035,0.017990112,0.020629883,-0.006439209,0.02268982,-0.0020599365,-0.035491943,-0.024307251,0.010185242,-0.03817749,-0.016311646,0.029251099,-0.0368042,-0.03086853,-0.043548584,-0.028808594,-0.0031204224,0.040863037,0.03479004,-0.023757935,-0.0491333,-0.0038871765,0.014984131,0.00093984604,0.0036945343,-0.014152527,-0.015655518,-0.010955811,-0.024642944,-0.03604126,0.0025157928,0.03829956,-0.013664246,-0.022842407,-0.00040388107,-0.023849487,0.035980225,0.012878418,0.008056641,0.05255127,-0.026489258,0.0052719116,0.0030231476,0.034606934,0.01033783,-0.023773193,-0.04498291,0.01852417,0.009529114,0.05496216,-0.030166626,-0.009460449,-0.011009216,0.025115967,-0.002231598,-0.011077881,-0.009895325,-0.014228821,-0.04034424,-0.103393555,0.038085938,-0.009941101,0.019073486,-0.010894775,0.023651123,0.0234375,-0.011039734,-0.017990112,0.028503418,-0.029815674,-0.031341553,-0.02935791,-0.02053833,-0.0074539185,0.009376526,-0.002500534,0.030792236,0.0068969727,0.022628784,0.015419006,-0.023208618,0.021194458,-0.0026359558,0.0025672913,0.044769287,-0.008338928,0.007949829,0.036468506,0.004295349,-0.027679443,0.018615723,0.0051612854,0.03277588,-0.007663727,0.03894043,0.048095703,0.011199951,0.008995056,0.006755829,-0.010353088,-0.02178955,0.0023727417,0.021606445,0.037475586,0.0017127991,-0.029022217,0.021911621,0.028884888,-0.039886475,-0.021514893,0.002494812,0.03677368,-0.05053711,0.009963989,0.005935669,0.035339355,-0.020446777,0.0034122467,0.028045654,0.03869629,0.027526855,0.0062217712,-0.014526367,0.0052108765,0.008552551,-0.0079193115,0.0058174133,-0.0131073,0.0068130493,-0.0065460205,0.012962341,0.022232056,0.005065918,-0.010261536,-0.024124146,-0.016220093,0.019607544,-0.013252258,0.016647339,0.02709961,0.028152466,-0.028198242,0.039093018,0.021453857,-0.040527344,0.008514404,-0.010795593,0.035827637,-0.0045394897,-0.0042304993,0.012046814,0.015357971,0.024337769,-0.05618286,-0.024932861,0.007987976,0.02835083,-0.029815674,-0.031204224,-0.031341553,-0.016067505,0.017669678,0.0069618225,0.00032830238,0.03378296,-0.024902344,0.013137817,0.014381409,0.014442444,-0.016357422,0.008140564,-0.03189087,-0.014022827,-0.0015134811,0.015174866,-0.007896423,0.0073394775,-0.01991272,-0.034210205,-0.0039253235,-0.020095825,0.0007171631,-0.0037174225,0.012214661,0.036193848,-0.013404846,0.008430481,-0.03451538,-0.037597656,0.0038108826,0.014480591,0.018676758,-0.04248047,0.001168251,-0.013725281,-0.01576233,0.0014276505,0.0036621094,0.025527954,0.010307312,0.006843567,0.03579712,-0.06561279,0.041381836,-0.0030326843,-0.0077285767,0.004337311,-0.007949829,-0.010238647,-0.01751709,-0.0011644363,0.04562378,-0.018920898,-0.029586792,-0.018310547,-0.05496216,-0.010543823,-0.061584473,0.006034851,0.008605957,0.023468018,-0.015975952,0.011917114,0.011764526,-0.002943039,-0.0115737915,-0.0047798157,-0.016830444,0.01574707,0.044708252,0.013664246,-0.061767578,-0.029785156,-0.016433716,-0.013908386,-0.028167725,-0.035095215,-0.022277832,-0.012382507,-0.01007843,-0.010734558,-0.0066833496,-0.015991211,0.001115799,-0.046691895,0.03277588,-0.010734558,0.0043945312,-0.00021791458,-0.041900635,0.00020623207,0.0047187805,-0.011154175,0.026168823,-0.0048294067,-0.010955811,-0.018203735,0.004497528,0.030456543,0.021438599,-0.022628784,-0.024978638,0.006980896,-0.03353882,-0.055633545,-0.01309967,-0.01977539,0.0064201355,0.0020771027,-0.009529114,-0.05154419,0.010787964,-0.014793396,-0.0043792725,0.02255249,0.0019369125,0.015205383,0.001701355,0.017333984,0.00035858154,-0.022323608,-0.045928955,0.0035533905,0.010055542,-0.008407593,0.027526855,0.041931152,0.00056552887,-0.013687134,0.014907837,-0.0069465637,-0.0017671585,-0.015602112,0.016189575,-0.016708374,0.010009766,-0.0046653748,-0.014404297,-0.025405884,-0.004760742,0.07739258,-0.0037212372,-0.0015459061,-0.0016260147,-0.02015686,0.0018873215,0.033233643,-0.027816772,0.007171631,-0.015075684,0.020446777,-0.014663696,0.016693115,-0.0071907043,0.03692627,-0.028198242,-0.046966553,0.010269165,0.007835388,0.00004684925,-0.049041748,-0.033050537,-0.024520874,-0.004207611,-0.025634766,0.0037078857,0.015403748,0.00019216537,-0.027770996,-0.076049805,0.0034160614,0.050201416,-0.0020446777,0.01574707,-0.02508545,0.008987427,0.021820068,-0.026763916,0.0064353943,0.026763916,-0.033203125,-0.0017147064,-0.042114258,0.04046631,-0.003004074,-0.018615723,0.032806396,-0.015472412,0.018310547,-0.013069153,0.008682251,-0.02835083,-0.01727295,-0.015357971,0.00957489,-0.018157959,-0.016143799,0.024475098,-0.022735596,0.02809143,-0.0027389526,0.012924194,-0.0057678223,0.017456055,0.029815674,-0.034729004,-0.0043945312,0.01374054,-0.016311646,0.035064697,-0.032440186,0.047210693,0.008834839,-0.02784729,0.017822266,-0.011360168,-0.034210205,-0.036346436,-0.02168274,0.02607727,0.0079422,0.01777649,0.001036644,0.000875473,-0.0068893433,0.016738892,0.006729126,-0.0020179749,-0.010887146,-0.023117065,0.0007777214,0.017227173,0.014854431,0.015365601,0.017562866,0.025024414,0.04953003,-0.009002686,-0.02381897,-0.005859375,0.030532837,-0.0001796484,-0.006664276,0.02671814,0.011680603,0.012496948,0.01902771,0.010894775,-0.022720337,-0.020629883,-0.0063095093,-0.023803711,0.0028209686,0.009590149,0.027069092,0.009605408,0.00052022934,0.0055885315,-0.029220581,-0.003025055,-0.036224365,-0.014320374,0.016342163,0.008613586,0.014190674,0.010025024,0.003665924,0.021957397,-0.0005893707,0.019821167,0.0124435425,-0.015853882,0.026794434,0.022720337,-0.000014781952,-0.01763916,-0.00920105,-0.010139465,-0.008308411,-0.0071525574,-0.006286621,-0.0016956329,0.042877197,-0.014137268,0.022460938,0.0079422,0.016998291,-0.014190674,0.017669678,-0.01184082,0.028167725,0.0040245056,0.011978149,-0.04559326,0.024505615,0.024887085,0.007785797,-0.010383606,-0.022369385,-0.024017334,0.028839111,0.015701294,-0.0057029724,0.029693604,-0.012779236,0.032287598,-0.010673523,-0.015396118,0.021026611,-0.034576416,-0.028808594,0.03375244,-0.009002686,0.0056915283,0.012145996,-0.03387451,0.04449463,-0.026885986,0.009712219,0.0037708282,-0.017669678,-0.021621704,-0.030197144,0.006378174,-0.034362793,-0.029708862,0.0030784607,-0.0020999908,0.0423584,0.0440979,0.021957397,0.030975342,-0.009140015,-0.014343262,-0.051452637,-0.044891357,0.030639648,-0.029067993,0.0231781,-0.021224976,0.047027588,0.04046631,0.014892578,0.03353882,0.025527954,0.0287323,-0.002298355,0.010917664,-0.023468018,0.004638672,-0.024154663,0.008552551,0.01083374,0.04348755,-0.028381348,0.009979248,0.0015125275,0.021591187,-0.012931824,0.014701843,0.06781006,0.016433716,-0.003873825,0.025009155,0.006580353,-0.037109375,0.00036358833,-0.015670776,0.043914795,0.00198555,0.0435791,0.03967285,0.012573242,-0.012741089,0.020050049,-0.032440186,-0.016159058,0.037597656,0.031555176,-0.008201599,0.0031852722,-0.002658844,-0.0016889572,-0.056640625,-0.03475952,0.028244019,0.013000488,0.017959595,-0.006919861,-0.011024475,0.0011339188,0.036224365,0.013267517,0.013511658,-0.005458832,0.019836426,0.032440186,0.0045776367,0.039642334,-0.01398468,0.005657196,-0.029708862,-0.015396118,0.009185791,-0.012016296,-0.012130737,-0.0070762634,0.027359009,0.032470703,0.048858643,0.03527832,-0.016616821,0.0050849915,0.029281616,0.016220093,0.020843506,0.03555298,0.017211914,-0.0009460449,0.03213501,0.02319336,0.012588501,0.00032496452,0.011734009,-0.0069007874,-0.00065374374,0.007331848,-0.0158844,0.010421753,-0.008888245,0.011077881,-0.013023376,-0.005897522,0.022857666,0.021835327,0.0016803741,0.0023021698,0.012619019,0.0049057007,0.0026302338,0.01701355,0.0005745888,-0.012145996,0.049621582,0.008834839,0.035827637,-0.0017337799,0.03262329,-0.020553589,0.0020618439,-0.005821228,0.009811401,-0.05215454,0.018341064,-0.00014865398,-0.017501831,-0.026382446,0.011558533,0.0012588501,-0.011116028,0.04031372,0.010566711,-0.014572144,0.009063721,0.029281616,0.03237915,-0.016311646,0.0014476776,-0.024932861,0.019378662,0.049591064,0.0256958,-0.00554657,-0.03656006,0.019836426,0.012924194,0.0013809204,-0.008865356,-0.0115737915,-0.0071029663,-0.047821045,0.02394104,0.032318115,0.0028686523,0.039276123,0.0029659271,-0.018859863,0.0010204315,0.01689148,-0.0052719116,-0.014923096,-0.014152527,0.016067505,-0.011428833,0.046661377,0.04296875,0.001625061,0.031173706,-0.0066719055,-0.011291504,-0.0026760101,-0.02909851,0.012718201,-0.031402588,-0.00090265274,-0.020629883,0.031341553,-0.024261475,-0.01158905,-0.00415802,-0.021957397,-0.024978638,-0.023910522,0.022033691,0.024154663,0.026504517,0.02947998,0.007965088,-0.02973938,0.06311035,-0.023345947,0.04220581,-0.0181427,-0.0077667236,0.059631348,0.03729248,0.031707764,0.0023536682,0.013725281,-0.026992798,0.0038967133,0.030273438,0.012161255,0.021591187,-0.010017395,-0.03668213,0.035491943,-0.004951477,0.011878967,-0.03564453,0.003238678,0.0115356445,-0.015098572,-0.021148682,0.00044584274,-0.01222229,0.0019664764,0.035491943,-0.027633667,-0.027023315,-0.013801575,-0.013687134,0.027999878,-0.01838684,-0.01878357,0.0021839142,-0.022399902,0.0069999695,0.009399414,-0.020874023,0.012237549,0.037261963,-0.03048706,-0.006881714,-0.000034749508,0.02822876,-0.030273438,0.026397705,0.025985718,-0.0017337799,0.0036411285,0.043670654,0.0001502037,0.04055786,-0.027175903,0.026031494,0.03338623,-0.0042877197,-0.01826477,0.01663208,0.025115967,-0.025756836,0.012763977,0.026885986,0.010543823,0.004917145,-0.0016651154,-0.008476257,-0.0024280548,0.0095825195,-0.02861023,0.010238647,-0.019424438,-0.035583496,0.00819397,0.021072388,-0.0014877319,0.00005286932,-0.0028648376,0.009521484,0.0063056946,0.029296875,0.01939392,-0.035705566,0.0011940002,-0.0026435852,0.0018796921,-0.032836914,-0.020202637,0.009895325,-0.047668457,0.022232056,0.035308838,0.006500244,0.009780884,-0.012519836,-0.007320404,0.031066895,0.012359619,0.02268982,0.010269165,0.0023059845,0.034698486,-0.0065612793,0.004878998,-0.018081665,-0.012809753,-0.0029296875,0.016021729,-0.011260986,-0.028121948,0.010368347,-0.0016059875,0.008636475,0.000487566,-0.016433716,0.04837036,-0.00044870377,0.007873535,-0.00068616867,0.01285553,-0.02331543,-0.026123047,-0.031677246,0.006504059,0.04876709,-0.01928711,-0.014778137,0.011299133,0.046722412,0.014984131,0.033325195,-0.0058937073,0.05105591,0.021499634,-0.007671356,-0.040283203,0.008071899,-0.023498535,-0.026733398,0.03173828,-0.031280518,-0.021469116,0.018417358,0.0017061234,-0.018936157,-0.025497437,-0.0040359497,-0.016448975,-0.028961182,0.025177002,-0.00459671,-0.004016876,-0.03390503,-0.0075187683,0.010620117,-0.025466919,-0.04421997,-0.006702423,0.0030879974,-0.015151978,-0.054595947,0.014076233,-0.030380249,0.0070381165,-0.006702423,0.0064697266,-0.018234253,0.039489746,0.0019607544,0.00086450577,0.016021729,0.019424438,0.0158844,0.004787445,0.037353516,-0.040985107,-0.043151855,-0.0098724365,-0.0052375793,-0.01586914,0.02432251,-0.0013628006,0.009803772,0.004009247,-0.005180359,0.013153076,-0.016799927,-0.01322937,-0.005680084,-0.041412354,-0.032470703,0.011428833,0.028869629,-0.008522034,0.0048942566,0.041870117,-0.010040283,-0.024856567,0.017211914,0.032989502,0.0043563843,0.030090332,-0.005428314,-0.004676819,-0.02154541,0.0028686523,-0.023910522,0.010902405,0.005027771,0.0014181137,-0.018188477,0.021469116,0.009063721,-0.0088272095,0.015602112,0.018188477,0.016616821,-0.011878967,0.031341553,0.009918213,0.007423401,-0.009880066,-0.0020828247,0.016189575,0.023925781,0.024963379,0.015716553,-0.003829956,0.00680542,0.0011196136,-0.010238647,-0.0027103424,-0.022979736,-0.030151367,-0.024368286,-0.017745972,-0.0043678284,-0.009277344,0.00995636,-0.002368927,0.030578613,-0.00705719,-0.029510498,-0.016464233,0.027374268,0.0105896,-0.0037784576,0.012634277,0.014968872,-0.0047340393,-0.042999268,0.019897461,-0.062042236,-0.042877197,-0.008148193,-0.015022278,0.0072746277,-0.005680084,-0.0129776,0.00459671,0.0033607483,-0.027893066,0.01184082,0.03555298,-0.02192688,-0.0041542053,0.0062789917,0.026687622,-0.016113281,0.012718201,-0.028411865,-0.014793396,0.013534546,-0.0013504028,0.02909851,0.0046157837,0.025924683,-0.0029067993,-0.02418518,0.002670288,0.0045166016,0.002532959,-0.038330078,-0.0033874512,0.007881165,-0.01838684,0.010322571,-0.010368347,-0.036254883,-0.012771606,-0.0024585724,-0.020950317,0.01007843,0.019622803,0.016494751,0.0065193176,0.032348633,-0.028656006,-0.00566864,-0.0031909943,0.0032100677,-0.034362793,-0.0024337769,0.02619934,-0.004917145,-0.022949219,-0.016067505,-0.008918762,-0.029022217,-0.023254395,0.009033203,-0.018630981,-0.008766174,0.019485474,0.029785156,0.03152466,0.019592285,0.01574707,0.009895325,0.0022296906,0.01638794,-0.004421234,0.041625977,0.0018501282,-0.03869629,-0.001115799,0.0028457642,-0.011787415,-0.014205933,-0.0076789856,-0.009101868,-0.0390625,0.011955261,-0.016159058,0.03265381,-0.0061073303,0.030761719,-0.026657104,-0.009757996,-0.026763916,0.0030841827,-0.035186768,-0.005405426,0.042816162,0.015396118,-0.004524231,-0.02230835,-0.03692627,0.016540527,0.004814148,0.0044555664,-0.03729248,-0.019104004,-0.001750946,0.0062789917,0.017822266,0.026657104,-0.015365601,-0.00995636,0.0004506111,0.0063285828,-0.008132935,-0.0051956177,0.00088357925,-0.0015602112,-0.0109939575,0.016906738,0.029525757,0.005168915,-0.010177612,-0.006542206,-0.006549835,0.034729004,0.031433105,-0.0057640076,0.025924683,0.024551392,-0.041503906,0.055999756,-0.031311035,0.018173218,-0.02796936,-0.00006604195,-0.032104492,-0.008407593,0.006916046,-0.00094509125],"createdAt":"2026-04-21T18:32:12.888Z","updatedAt":"2026-04-22T04:02:25.635Z","lastSeenAt":"2026-04-22T04:02:25.635Z","tsv":"'/api':181 '/api/v1/emails/88':45,96,202 '/docs':179 '/pricing':180 '/readme':182 '0.02':10,24,83,136 '000':131 '20':130 '402':232 '6':141 'Base network API' 'USDC email API' 'accept':123 'access':37,103 'across':62 'ai':67 'analyt':66 'api':60,102,155 'attach':163 'base':8,22,91,132,144 'broader':51 'call':59 'caller':161 'categori':63 'challeng':120,233 'charg':127 'confirm':121,227 'connect':187 'content':193 'data':5,19,65,110,212 'decim':142 'describ':98 'document':107,177 'dozen':54 'e.g':213 'email':4,18,41,210,216 'email API' 'email-data' 'email-rel':40,209 'endpoint':6,20,30,61,76,95,203,225 'exact':151,198 'expect':117 'financ':70 'function':199 'gate':3,17 'header':168 'includ':64 'infrastructur':73 'input':115 'key':156 'learn':69 'limit':159 'live':228 'lowpaymentfee email' 'lowpaymentfee.com':32 'machin':68 'made':147 'may':207 'network':92 'offer':53 'page':178 'part':48 'pay':9,23,57 'pay-per-cal':56 'pay-per-call email' 'pay-per-request' 'payment':145,167,172 'per':11,25,58,84 'platform':52,79,175 'post':124 'post-endpoint' 'premium':101 'premium email endpoint' 'price':81 'prompt':189 'proof':173 'proper':231 'protocol':36 'provid':33 'rate':158 'record':217 'relat':42,211 'request':12,26,85,125 'requir':160 'resourc':43 'respons':234 'result':196 'return':112,184,208 'scheme':152 'settl':86 'simpli':162 'sinc':138 'specif':94,215 'specul':223 'substant':192 'templat':219 'unclear':205 'unit':133 'usd':137 'usdc':14,28,88,135,139 'usdc-base' 'use':140 'util':74 'valid':171 'via':148,229 'wallet':188 'web3':71 'x':166 'x-payment':165 'x402':2,16,35,119,150 'x402 email' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"889efbcb-89d0-42aa-a2da-565f7acde530","listingId":"e325cac1-c2a0-4ee2-9f23-d23338e92ad7","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/88","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:12.888Z"}],"sources":[{"listingId":"e325cac1-c2a0-4ee2-9f23-d23338e92ad7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/emails/88","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:12.888Z","lastSeenAt":"2026-04-22T04:02:25.635Z"}],"details":{"listingId":"e325cac1-c2a0-4ee2-9f23-d23338e92ad7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/emails/88 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/emails/88"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/emails/88"}],"useCases":["Retrieving email-related data or records via a single paid API call","Agent-driven workflows that need on-demand email information without API key management","Programmatic access to email resources with instant crypto micropayments"],"bestFor":["Developers wanting keyless, pay-per-use email data access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","High-volume email operations where per-request pricing is inefficient","Anyone without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:20.129Z"},"updatedAt":"2026-04-22T04:02:25.635Z"}}