{"id":"21b71e62-6fd8-4711-b6cd-3b1cf09d9a39","shortId":"y2sxb4","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-48` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs 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 exact scheme on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\n\nThe platform advertises a flat $0.02 per request across its listed endpoints, though this particular endpoint's x402 challenge specifies a maxAmountRequired of 20000 (in USDC's 6-decimal representation, equating to $0.02). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint is live and returns a proper 402 challenge.\n\nHowever, the exact functionality behind `/api/endpoint-48` is unclear. It does not correspond to any of the named endpoints listed on the site's homepage (which use paths like `/api/v1/...` and `/api/v2/...`). No documentation, input schema, or example responses are available for this specific path. The docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually does, callers should treat it as an opaque premium API with uncertain functionality.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-request","post-endpoint","json-response"],"categories":["api","payment"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","premium endpoint","micropayment API"],"warnings":["Endpoint path /api/endpoint-48 does not match any documented API on the site's homepage","No input schema or output schema available — callers cannot know what to send or expect","All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no content","Actual functionality of this endpoint is completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-48","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-48","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid 402 challenge, but there is no documentation, no input/output schema, and the endpoint path does not match any of the named APIs on the site. The actual functionality is unknown, making this 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":"2026-04-18T19:35:01.226Z","embedding":[-0.03062439,-0.04171753,0.040740967,0.010505676,0.000726223,-0.023651123,-0.023925781,0.038208008,0.07501221,-0.074035645,0.044067383,-0.056549072,-0.02909851,-0.042877197,-0.049102783,0.0053367615,0.0029125214,0.0024738312,-0.044036865,0.03488159,0.043945312,-0.02104187,-0.017959595,0.03125,-0.0027256012,-0.014419556,-0.015510559,-0.008842468,-0.008773804,-0.01890564,0.02909851,-0.020141602,-0.00011408329,0.01386261,-0.021484375,-0.012298584,-0.0005021095,0.05279541,0.036468506,-0.008575439,0.01586914,-0.056640625,-0.006641388,-0.011398315,-0.03414917,0.006099701,0.00843811,-0.024810791,-0.006401062,0.00035119057,-0.02355957,0.0004017353,-0.017684937,0.01133728,-0.0021858215,0.0047073364,-0.0110321045,-0.025878906,0.013305664,0.0072250366,-0.007347107,-0.06781006,-0.019729614,0.0012407303,0.01979065,0.050720215,-0.015060425,0.052337646,0.010879517,0.07867432,0.03717041,0.05456543,0.028289795,0.009506226,0.0154953,-0.0053710938,0.010269165,0.045776367,-0.020828247,-0.024627686,-0.02444458,-0.003900528,-0.04611206,-0.0022392273,-0.025436401,-0.040893555,-0.023773193,0.019592285,-0.03173828,0.020385742,-0.06652832,-0.00459671,-0.013328552,0.015388489,-0.012298584,-0.020889282,-0.022903442,0.018920898,-0.013717651,0.010887146,0.001042366,-0.029159546,0.027450562,0.0057907104,0.052978516,0.03656006,0.012039185,0.042114258,0.010032654,-0.03677368,0.001616478,0.018203735,-0.012870789,-0.014328003,0.019439697,0.008796692,-0.016220093,0.022354126,-0.01890564,0.03375244,-0.056732178,0.06414795,0.020004272,-0.01637268,0.009262085,-0.03894043,-0.007091522,0.0019006729,-0.016403198,0.0026187897,0.03189087,0.0031585693,0.013641357,-0.0317688,-0.032043457,0.01663208,-0.020690918,-0.019332886,-0.044891357,-0.025390625,0.02130127,-0.020874023,0.025222778,0.039642334,-0.08459473,0.0038433075,-0.04095459,0.012550354,-0.03427124,-0.0062332153,-0.0034713745,0.009689331,-0.017822266,-0.0054397583,-0.021728516,-0.01033783,0.007827759,0.040008545,-0.0096206665,0.04156494,-0.004261017,0.019683838,0.021759033,0.013092041,0.03186035,0.044555664,0.02557373,-0.06530762,-0.08538818,-0.029754639,-0.008995056,-0.01701355,-0.033599854,0.01991272,0.00037050247,-0.05618286,-0.030731201,-0.028640747,0.0002477169,-0.04269409,0.017349243,-0.028793335,0.0057868958,0.0037822723,-0.07232666,-0.030700684,-0.028366089,0.05328369,0.018432617,-0.0012836456,0.03591919,-0.002500534,0.062408447,0.010406494,-0.044311523,-0.04776001,0.024719238,-0.007801056,0.029373169,0.01071167,0.0069618225,-0.025680542,0.03387451,0.07299805,0.010757446,0.005859375,-0.003566742,-0.054138184,-0.023712158,-0.05029297,0.008056641,0.0051956177,-0.0029315948,0.046295166,-0.02810669,-0.047576904,-0.007320404,0.0023403168,0.021331787,0.061767578,-0.005634308,0.010627747,0.0021038055,0.022003174,-0.0256958,0.04699707,0.038909912,0.015167236,-0.051879883,-0.01977539,0.008666992,0.030517578,-0.03189087,-0.006374359,-0.015182495,0.018325806,-0.006385803,0.007873535,0.040618896,-0.0073013306,-0.019073486,-0.03302002,-0.0053901672,0.011520386,0.003118515,-0.040130615,-0.04559326,-0.066711426,0.032958984,0.053222656,0.044677734,-0.0014190674,0.013504028,-0.022216797,-0.008682251,-0.05517578,0.054901123,0.054138184,-0.035003662,-0.0140686035,0.015419006,-0.019958496,-0.049621582,-0.010818481,-0.009376526,-0.018508911,-0.024841309,0.004047394,-0.03491211,0.004776001,0.0143585205,0.03213501,0.03555298,-0.014602661,-0.051635742,-0.02809143,0.00095272064,0.017349243,-0.036315918,-0.013557434,0.0036506653,0.0036640167,0.020721436,-0.001868248,0.018981934,-0.012901306,0.0104522705,0.0060806274,-0.0012683868,-0.024810791,-0.017745972,0.018798828,-0.0038890839,-0.06958008,0.006000519,-0.014915466,0.06817627,-0.050048828,0.04119873,-0.011833191,0.006210327,0.049346924,-0.012245178,-0.051086426,-0.002210617,0.013572693,0.04626465,0.042938232,0.012168884,-0.008888245,-0.0054740906,0.038848877,-0.014457703,-0.0015106201,0.015144348,0.030471802,0.033294678,0.014968872,-0.05670166,-0.033691406,-0.009025574,-0.02355957,0.012145996,-0.016448975,0.021911621,-0.0107040405,-0.0045776367,-0.03475952,-0.0024490356,-0.03363037,0.006549835,-0.023529053,-0.009780884,-0.015113831,-0.011070251,0.023330688,0.019470215,-0.0038547516,0.003900528,0.029922485,0.017120361,-0.016143799,-0.0211792,-0.024398804,-0.034057617,0.007171631,0.01386261,0.032440186,0.013519287,0.028182983,-0.050994873,0.008491516,0.024368286,0.011192322,0.04763794,-0.014251709,0.010177612,-0.06262207,-0.0793457,-0.02772522,-0.042022705,0.030563354,0.002111435,0.0008940697,0.04168701,-0.00025439262,-0.014434814,-0.050567627,0.023727417,-0.034820557,0.004108429,0.048706055,-0.020248413,-0.040100098,0.0021953583,0.016403198,0.0038547516,0.022399902,0.0051727295,0.007347107,0.071899414,0.054351807,0.017410278,-0.0007996559,-0.0048179626,0.026733398,-0.013534546,-0.029205322,-0.025527954,-0.030288696,0.012145996,-0.015548706,-0.020935059,-0.07946777,0.051483154,0.03353882,0.078430176,-0.0022563934,0.008430481,0.032989502,-0.02999878,0.012908936,-0.026855469,-0.019073486,-0.029830933,-0.031066895,0.038513184,-0.017425537,0.0038375854,-0.024047852,0.023239136,0.0067749023,0.020339966,-0.043121338,0.06365967,0.0053100586,-0.00007879734,0.009544373,0.008293152,0.04107666,0.061187744,-0.044281006,0.0151901245,0.029464722,-0.028396606,-0.0007739067,0.043426514,-0.020080566,-0.0037784576,-0.060668945,-0.018432617,0.0051994324,-0.00028467178,-0.05670166,-0.005153656,-0.0079422,0.024795532,0.013534546,-0.027542114,-0.045318604,-0.0057258606,-0.011428833,-0.054138184,-0.015235901,-0.044403076,0.028839111,0.052246094,-0.01777649,-0.009216309,0.00040125847,0.00042247772,0.0043563843,0.022155762,-0.0062026978,-0.002620697,-0.035736084,0.020401001,-0.00093984604,0.027954102,0.012260437,0.035888672,0.025253296,0.03363037,0.04647827,0.011833191,-0.01751709,-0.04815674,0.005680084,-0.049316406,0.0011329651,0.009117126,-0.024810791,-0.00013279915,-0.0234375,-0.022521973,-0.022537231,0.007545471,-0.020843506,0.024856567,0.038848877,-0.043914795,-0.0357666,-0.046722412,-0.029006958,0.006210327,0.07873535,0.030471802,0.0031089783,-0.05508423,-0.023284912,0.02268982,0.008483887,0.016784668,-0.014411926,-0.017791748,-0.0178833,-0.03353882,-0.02218628,-0.017974854,0.026733398,-0.004753113,-0.023498535,0.04437256,-0.019561768,0.027877808,-0.0037631989,0.010414124,0.04724121,-0.021591187,0.005683899,-0.046844482,0.02659607,0.0048980713,-0.018554688,-0.06304932,0.05758667,0.012466431,0.030838013,-0.037200928,0.0036830902,-0.005519867,0.030960083,0.001909256,-0.023147583,-0.014457703,0.008705139,-0.059661865,-0.06793213,0.04031372,-0.009902954,0.036590576,0.010147095,0.013961792,0.02468872,0.005886078,-0.0085372925,0.023773193,-0.022064209,-0.005844116,-0.04046631,-0.03479004,-0.023712158,0.003786087,-0.025039673,0.018447876,-0.010734558,0.009963989,0.0019626617,-0.027923584,0.0368042,-0.0063972473,0.0066871643,0.024002075,0.0040359497,0.0035362244,0.02986145,0.008201599,-0.03503418,0.028533936,0.006137848,0.004348755,-0.008361816,0.047058105,0.02696228,-0.004016876,0.0009570122,-0.0047302246,-0.01637268,-0.022155762,-0.017486572,0.009414673,0.049468994,0.0030765533,-0.023590088,0.029785156,0.008705139,-0.03390503,-0.018325806,0.006664276,0.021743774,-0.03265381,0.0072746277,0.02355957,0.048339844,-0.023468018,-0.006336212,0.014183044,0.021118164,0.023895264,0.024536133,-0.019500732,0.013320923,-0.013832092,0.021072388,0.011047363,-0.013137817,0.006122589,-0.006313324,0.030593872,0.021209717,0.027954102,-0.031143188,-0.017578125,-0.008216858,-0.017715454,-0.020584106,0.022567749,0.029785156,0.028533936,-0.022705078,0.030303955,0.016403198,-0.0345459,-0.011451721,-0.0074272156,0.031341553,-0.009170532,-0.0076293945,0.013793945,0.017242432,0.039093018,-0.052520752,0.003200531,-0.0009584427,0.020111084,-0.019622803,-0.032196045,-0.026184082,-0.0011577606,0.039886475,0.0087509155,0.008842468,0.03390503,-0.0043029785,0.0039024353,0.019882202,-0.0005340576,-0.016860962,-0.025299072,-0.039398193,0.000872612,-0.004421234,-0.0032730103,-0.013572693,0.0034770966,-0.017532349,-0.030807495,0.0040779114,-0.005218506,-0.0047950745,-0.00299263,0.017410278,0.03756714,0.0042381287,0.007843018,-0.011276245,-0.017990112,0.008483887,0.0096206665,0.025939941,-0.038604736,0.018585205,-0.014915466,-0.0068511963,-0.006549835,0.021987915,0.022399902,0.021377563,-0.0003669262,0.027618408,-0.032806396,0.040100098,-0.022064209,0.008117676,0.004814148,-0.03793335,-0.01889038,-0.022979736,-0.023132324,0.028640747,-0.024124146,-0.004257202,-0.020401001,-0.028762817,-0.015037537,-0.051849365,0.024276733,0.02267456,0.037475586,-0.03652954,0.0016508102,-0.005519867,0.0074386597,-0.015670776,0.0014152527,0.0059318542,0.022888184,0.017547607,0.011459351,-0.029708862,-0.021270752,-0.0029182434,-0.0026664734,-0.050231934,-0.04748535,-0.018585205,0.006629944,0.00065374374,0.006931305,-0.025100708,-0.026519775,-0.0074005127,-0.036712646,0.002998352,0.003376007,0.022369385,0.015701294,-0.026824951,-0.009422302,0.015388489,-0.01927185,0.021606445,-0.0028514862,-0.0014190674,-0.034484863,-0.00068855286,0.03289795,0.028640747,0.0058517456,-0.013832092,0.000018954277,-0.023101807,-0.054656982,-0.0011949539,-0.011077881,0.004261017,0.01109314,-0.015327454,-0.05203247,-0.0073432922,-0.021606445,0.006706238,0.022460938,-0.0010080338,0.030700684,0.011039734,-0.0019683838,-0.026550293,-0.017242432,-0.05050659,0.0143966675,0.011009216,0.012893677,0.016586304,0.037139893,0.0037651062,0.00086927414,0.015823364,0.00868988,0.015151978,-0.037017822,0.010894775,-0.0010461807,0.0119018555,-0.0116119385,-0.010375977,-0.027542114,0.0048217773,0.078552246,-0.015296936,0.026031494,-0.0018863678,-0.017456055,0.021850586,0.03704834,-0.059265137,0.0016832352,-0.026428223,0.015823364,-0.012237549,0.025024414,0.005355835,0.015235901,-0.0256958,-0.058746338,-0.004673004,0.0206604,-0.0024852753,-0.0597229,-0.01776123,-0.054351807,-0.008262634,-0.005874634,-0.015457153,0.003967285,0.0021572113,-0.015777588,-0.090270996,-0.001616478,0.05633545,0.009307861,0.015182495,-0.022125244,0.024612427,0.02130127,-0.025741577,-0.022521973,0.04144287,-0.035888672,-0.009773254,-0.029830933,0.0418396,-0.028656006,-0.033416748,0.022033691,0.013755798,0.008506775,-0.003572464,0.021697998,-0.01612854,0.0019760132,0.00066947937,0.019042969,-0.010292053,-0.024917603,0.03111267,-0.042510986,0.024795532,0.015312195,-0.0021591187,-0.009757996,0.035583496,0.02909851,-0.037963867,-0.020111084,0.04446411,0.012916565,0.043426514,-0.033447266,0.039978027,0.00068569183,-0.01940918,0.013160706,-0.017028809,-0.020828247,-0.053649902,-0.04284668,-0.0015888214,-0.00806427,0.01423645,-0.024765015,0.011810303,0.028793335,0.014816284,0.0044517517,-0.016586304,-0.021057129,-0.011985779,0.0010328293,0.009605408,-0.011253357,0.00059080124,0.027633667,0.015975952,0.035003662,0.0008125305,-0.0027828217,0.014709473,0.0178833,-0.031173706,0.0070610046,0.022354126,0.005542755,0.012199402,0.018997192,0.017623901,-0.033294678,-0.018615723,-0.0068244934,-0.0060310364,0.007007599,-0.008155823,-0.018493652,-0.0041275024,-0.0028247833,0.0049438477,-0.04348755,0.01586914,-0.03353882,-0.033050537,-0.008110046,-0.01852417,0.018234253,0.015731812,-0.0021800995,0.016204834,-0.009117126,0.037353516,0.003156662,-0.031066895,0.03062439,0.03387451,0.00034976006,-0.037261963,0.0056381226,-0.0031852722,-0.009536743,0.0012369156,-0.0178833,0.012817383,0.034942627,-0.012023926,0.0032577515,0.0032596588,0.019332886,-0.0013713837,0.022720337,-0.0047836304,0.01689148,-0.020507812,0.032043457,-0.05029297,0.013908386,0.025726318,-0.0041236877,-0.011711121,-0.02142334,-0.025268555,0.017028809,0.019256592,-0.027175903,0.044708252,0.002840042,0.023239136,-0.025390625,-0.012062073,-0.0039405823,-0.020858765,-0.009757996,0.02709961,0.003458023,0.00932312,0.02407837,-0.03289795,0.030410767,-0.0435791,0.022720337,0.006427765,0.0059928894,-0.017227173,-0.04031372,-0.01448822,-0.015602112,-0.004924774,0.007381439,0.0061683655,0.03945923,0.039031982,0.009124756,0.03164673,0.015899658,0.007701874,-0.03451538,-0.038360596,0.002544403,-0.03137207,0.023239136,-0.02696228,0.04586792,0.044067383,-0.012496948,0.02798462,0.037872314,0.03074646,0.009483337,0.009506226,-0.005870819,0.007511139,-0.008262634,0.020446777,0.021972656,0.042663574,-0.01914978,0.012229919,0.008079529,0.016479492,-0.024810791,0.036315918,0.07092285,0.035308838,-0.0016336441,0.02142334,0.00034856796,-0.010253906,-0.019638062,-0.015670776,0.052459717,0.0058174133,0.052947998,0.02835083,0.016326904,-0.009597778,0.030776978,-0.016311646,-0.020690918,0.055999756,0.013832092,-0.014564514,-0.016647339,-0.0073432922,0.009376526,-0.04827881,-0.018600464,0.01939392,0.013534546,0.0073928833,0.010444641,0.006713867,-0.009819031,0.024841309,0.012283325,0.011413574,-0.010574341,0.034088135,0.023284912,0.016311646,0.012176514,-0.0035572052,0.027114868,-0.033599854,-0.008842468,0.011024475,0.009971619,0.0051345825,0.0064353943,0.023117065,0.017532349,0.050201416,0.033172607,-0.018859863,-0.0068626404,0.033233643,0.0113220215,0.011100769,0.042114258,0.017181396,0.004890442,0.037353516,0.04067993,0.021057129,-0.03201294,0.010620117,-0.015609741,0.014198303,-0.0072288513,-0.023223877,0.014877319,-0.005744934,0.00082969666,0.016998291,-0.013206482,0.035186768,0.04034424,-0.0028076172,0.004085541,-0.0020618439,0.008361816,-0.0143585205,-0.0012817383,0.016021729,-0.017227173,0.030151367,0.013534546,0.044433594,-0.02406311,0.04333496,0.0025424957,-0.0138168335,0.007835388,0.016860962,-0.0284729,0.0036716461,-0.0038700104,-0.011138916,-0.044067383,-0.000020384789,0.010925293,-0.00894165,0.01386261,0.00048327446,-0.0013313293,0.009681702,0.03488159,0.020248413,-0.009208679,-0.010726929,-0.027923584,0.039001465,0.039031982,-0.002752304,0.0043754578,-0.021148682,-0.001627922,0.016098022,0.008270264,-0.00819397,-0.007549286,-0.017593384,-0.03970337,0.019515991,0.04232788,0.023620605,0.03945923,-0.0010709763,-0.016021729,-0.005760193,0.022735596,0.0045394897,-0.017745972,-0.0151901245,0.009841919,-0.017547607,0.0463562,0.027633667,0.0027656555,0.031555176,-0.016494751,-0.023971558,0.00598526,-0.022613525,0.012275696,-0.015945435,0.010818481,-0.030731201,0.02053833,-0.027145386,-0.039093018,0.007850647,-0.02432251,-0.022003174,-0.019088745,0.010665894,0.019042969,0.028869629,0.03668213,0.017181396,-0.023590088,0.06530762,-0.012329102,0.044891357,-0.02192688,0.0024032593,0.043945312,0.030044556,0.043029785,0.016723633,0.022476196,-0.029647827,0.018569946,0.029647827,0.022369385,0.015731812,-0.0036182404,-0.015640259,0.038604736,-0.007335663,0.019104004,-0.013114929,-0.0067977905,0.024383545,-0.008430481,-0.0014810562,0.0041007996,-0.014732361,0.026763916,0.032073975,-0.02973938,-0.011070251,-0.008308411,-0.015914917,0.04647827,0.005996704,0.009483337,0.0031089783,-0.022705078,0.0181427,-0.03189087,-0.0065689087,0.005744934,0.02609253,-0.04107666,-0.020645142,0.007820129,0.017242432,-0.028213501,0.029083252,0.018203735,-0.012084961,0.011444092,0.04324341,0.001627922,0.048339844,-0.015716553,0.020507812,0.047607422,0.0000705719,-0.007549286,0.013793945,0.024047852,-0.024353027,0.026428223,0.04095459,-0.0071907043,0.015350342,-0.0013074875,-0.017318726,0.0054626465,0.00087451935,-0.0049324036,-0.0058631897,-0.011352539,-0.026031494,0.001291275,0.017929077,0.0020313263,0.00082731247,-0.0025634766,-0.015151978,-0.004184723,0.048736572,0.013587952,-0.042236328,0.013328552,0.0045776367,0.018310547,-0.030776978,-0.0082473755,-0.00894928,-0.029632568,0.013168335,0.019500732,0.0067977905,0.009544373,-0.018218994,-0.00894928,0.026153564,0.017028809,0.02607727,0.007255554,-0.0014305115,0.015144348,-0.019561768,-0.00046253204,-0.007904053,0.0032157898,0.0036411285,0.00060606,-0.0033874512,-0.027618408,0.014381409,-0.008277893,0.015007019,0.006904602,-0.019302368,0.024673462,-0.026397705,-0.0064926147,-0.0029125214,0.0072517395,-0.016143799,-0.028686523,-0.029708862,0.03491211,0.049591064,-0.0236969,-0.018737793,0.01876831,0.018966675,0.03704834,0.028289795,0.0049438477,0.056121826,0.023483276,-0.013923645,-0.036315918,0.016708374,-0.013557434,-0.028869629,0.014945984,-0.0115737915,-0.012321472,0.00868988,0.01725769,-0.0020542145,-0.024917603,-0.014511108,-0.014419556,-0.021469116,0.013595581,-0.016159058,0.000395298,-0.031555176,-0.0154418945,0.0074653625,-0.023788452,-0.026931763,-0.036132812,0.0038051605,-0.010734558,-0.05038452,0.016281128,-0.02142334,0.0154800415,-0.03756714,-0.007106781,-0.009033203,0.035095215,-0.0075187683,0.0013494492,0.0029067993,0.0345459,0.005756378,0.021194458,0.015151978,-0.022750854,-0.03781128,-0.009994507,-0.00806427,-0.018295288,0.008735657,-0.023544312,0.03765869,0.008934021,0.00605011,-0.0020561218,-0.0026779175,-0.0105896,-0.0017261505,-0.039978027,-0.0051879883,0.016723633,0.022842407,0.00068569183,-0.019546509,0.040924072,-0.010070801,-0.010948181,0.026138306,0.0309906,0.023452759,0.035614014,-0.013259888,-0.018417358,-0.02079773,-0.009880066,-0.018600464,0.014305115,0.011047363,0.014778137,-0.016616821,0.0037231445,0.020355225,-0.0072746277,-0.007080078,0.03062439,-0.016433716,-0.010154724,0.028579712,0.012374878,-0.0021839142,-0.007160187,-0.02279663,0.02218628,0.03640747,0.0021514893,0.0018911362,-0.0058631897,0.015777588,-0.020446777,0.0066566467,0.013557434,-0.011550903,-0.027511597,-0.0039901733,-0.02696228,0.02748108,0.007545471,0.01953125,0.011856079,0.018569946,-0.0071792603,-0.036865234,-0.016601562,0.023452759,0.0141067505,-0.0072250366,0.003545761,0.00055503845,0.0154800415,-0.03466797,0.011558533,-0.032440186,-0.022415161,-0.012619019,-0.038482666,0.020843506,0.0017585754,0.00015449524,0.00040268898,-0.013427734,-0.0034770966,0.008476257,0.029281616,-0.014694214,-0.015548706,0.021453857,0.027038574,-0.014602661,0.02709961,-0.024169922,-0.010848999,0.016525269,-0.007411957,0.010925293,-0.009346008,0.03125,0.015510559,-0.008560181,0.021194458,0.0062942505,0.012580872,-0.021057129,0.0037555695,-0.007610321,0.0020160675,0.01171875,-0.027770996,-0.028823853,0.009796143,-0.012611389,-0.051818848,0.008346558,0.023086548,0.038848877,-0.02748108,0.033325195,-0.013000488,-0.018600464,0.01638794,0.0054016113,-0.025482178,0.009246826,0.04550171,-0.0113220215,-0.009841919,0.004802704,-0.01084137,-0.024993896,-0.012817383,0.006412506,-0.011985779,-0.0046920776,0.018569946,0.016159058,0.04147339,0.010139465,0.015037537,0.017654419,0.0032730103,0.02960205,0.015960693,0.05255127,0.004306793,-0.026519775,0.0025405884,-0.00058841705,-0.026016235,-0.0037269592,-0.0021266937,0.008636475,-0.03881836,0.014549255,-0.010597229,0.02381897,-0.005870819,0.022338867,-0.026550293,0.0015277863,-0.03567505,-0.0032024384,-0.019927979,0.010185242,0.030197144,0.015052795,0.0059814453,0.0055885315,-0.023971558,0.017593384,0.0519104,-0.012130737,-0.040008545,-0.005832672,0.010955811,-0.0066337585,0.003768921,0.008079529,-0.01651001,-0.019958496,-0.0005030632,-0.0082473755,0.0029144287,0.0024433136,0.016113281,0.0061683655,-0.016494751,-0.0022792816,0.02583313,0.000018298626,0.0027446747,0.014053345,-0.0001308918,0.019958496,0.034820557,-0.010391235,0.01914978,0.020874023,-0.03302002,0.035186768,0.00028800964,0.027297974,-0.033935547,0.0031013489,-0.040740967,-0.014915466,-0.017333984,0.0054359436],"createdAt":"2026-04-18T18:31:47.732Z","updatedAt":"2026-04-23T05:00:36.850Z","lastSeenAt":"2026-04-23T05:00:36.850Z","tsv":"'/api/endpoint-48':32,162 '/api/v1':185 '/api/v2':187 '0.02':97,124 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':91 '20000':115 '402':155 '6':119 'Base network API' 'USDC API' 'accept':70 'access':68 'across':100 'actual':223 'advertis':94 'ai/ml':55 'analyt':54 'api':5,19,51,67,126,205,233 'application/json':74 'attach':135 'avail':196 'base':8,22,86 'base-network' 'behind':161 'caller':133,225 'challeng':110,156 'collect':42 'connect':211 'content':217 'contract':90 'correspond':168 'data':53 'decim':120 'doc':202 'document':189 'endpoint':6,20,30,63,103,107,148,174,222 'equat':122 'exact':82,159 'exampl':193 'finance/web3':57 'flat':96 'function':160,236 'gate':3,17 'handl':78 'header':140 'homepag':180 'howev':157 'infer':56 'infrastructur':59 'input':190 'json-response' 'key':127 'know':219 'label':65 'like':184 'limit':130 'list':102,175 'live':150 'lowpaymentfee' 'lowpaymentfee.com':37 'maxamountrequir':113 'micropayment API' 'name':173 'network':87 'offer':40 'opaqu':231 'page':206 'part':34 'particular':106 'path':183,200 'pay':10,24,48 'pay-per-call API' 'pay-per-request':9,23,47 'payment':76,139,145 'per':11,25,49,98 'platform':38,93 'post':71 'post-endpoint' 'premium':4,18,66,232 'premium endpoint' 'price':203 'prompt':213 'proof':146 'proper':154 'protocol':46 'rate':129 'represent':121 'request':12,26,50,72,99 'requir':132 'respons':75,194 'return':73,152,208 'schema':191 'scheme':83 'simpli':134 'site':178 'span':52 'specif':62,199 'specifi':111 'substant':216 'though':104 'treat':227 'uncertain':235 'unclear':164 'usdc':14,28,89,117 'usdc-payment' 'use':88,182 'util':60 'valid':143 'via':79 'wallet':212 'without':218 'x':138 'x-payment':137 'x402':2,16,45,81,109,144 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':44","prices":[{"id":"f92772e1-3040-44ec-9109-aade960cb09a","listingId":"21b71e62-6fd8-4711-b6cd-3b1cf09d9a39","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-48","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:47.732Z"}],"sources":[{"listingId":"21b71e62-6fd8-4711-b6cd-3b1cf09d9a39","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-48","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:47.732Z","lastSeenAt":"2026-04-23T05:00:36.850Z"}],"details":{"listingId":"21b71e62-6fd8-4711-b6cd-3b1cf09d9a39","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-48 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/endpoint-48","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-proof>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1 on POST","source_url":"https://lowpaymentfee.com/api/endpoint-48"},{"claim":"Payment is via USDC on Base network with maxAmountRequired of 20000 (≈$0.02)","source_url":"https://lowpaymentfee.com/api/endpoint-48"},{"claim":"The site lists various APIs at $0.02/request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/endpoint-48"}],"useCases":["Programmatic access to an x402-gated premium service via POST requests","Agent-driven API consumption with per-request USDC micropayments on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol integrations","AI agents that can autonomously pay for API calls via Base USDC","Users who want keyless, pay-as-you-go API access"],"notFor":["Users who need clear documentation of input/output schemas before calling","Anyone requiring free or subscription-based API access","Production workloads that depend on well-documented, stable API contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:02.246Z"},"updatedAt":"2026-04-23T05:00:36.850Z"}}