{"id":"8bb5c315-a7e7-4a3b-bfd0-9353fc8e16f7","shortId":"QFddu6","kind":"x402","title":"Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments.","tagline":"Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments.","description":"lowpaymentfee.com is a pay-per-request API platform that gates access to a broad set of endpoints behind x402 micropayments settled in USDC on the Base network. The specific endpoint `/api/v1/lab/results/64` is listed under \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request. This particular endpoint (`/api/v1/lab/results/64`) appears under a \"lab/results\" path that is not explicitly listed on the homepage, so its exact functionality is unclear — it may be an experimental or internal endpoint.\n\nThe endpoint is live and returns a proper 402 challenge. However, there is no OpenAPI schema, no documentation beyond the homepage listing, and no example request/response payloads available. The actual data returned by this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["data","api-platform"],"synonyms":["micropayment API","x402 endpoint","USDC pay-per-call","Base network API","lowpaymentfee","lab results API","premium API access"],"warnings":["The path /api/v1/lab/results/64 is not listed on the provider's homepage — its exact functionality is unknown.","No OpenAPI spec, no request/response examples, and no endpoint-specific documentation available.","Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/64","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/lab/results/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI schema, no documentation for this specific endpoint path, no example request/response, and the actual functionality of '/api/v1/lab/results/64' is not described anywhere in the crawled material. 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":"2026-04-21T22:39:34.323Z","embedding":[-0.018249512,-0.023834229,0.040924072,0.007118225,0.0061836243,-0.026626587,-0.025482178,0.017456055,0.062683105,-0.07293701,0.035614014,-0.048309326,-0.03265381,-0.032104492,-0.023834229,0.0041160583,0.0010528564,0.008110046,-0.05645752,0.025985718,0.037017822,-0.024993896,-0.0231781,0.02557373,-0.0060577393,-0.02986145,-0.00073862076,-0.0054855347,-0.015396118,-0.035339355,0.025466919,-0.027893066,-0.019119263,-0.0032920837,-0.014968872,0.0012264252,-0.00059366226,0.03086853,0.016998291,-0.006729126,-0.009399414,-0.06616211,0.00075149536,-0.007396698,-0.06185913,-0.02029419,0.008529663,-0.041381836,0.014083862,-0.016281128,-0.037872314,0.0019426346,-0.0023269653,-0.0005059242,0.002319336,0.018569946,0.008628845,-0.0015859604,0.015899658,0.013504028,-0.00016534328,-0.04949951,-0.0043258667,-0.002084732,0.006122589,0.05532837,-0.009490967,0.04537964,0.013183594,0.07098389,0.03302002,0.049682617,0.017410278,0.010826111,-0.022506714,-0.016952515,-0.0037555695,0.06188965,-0.008972168,-0.027801514,-0.017333984,-0.024780273,-0.021575928,0.0027809143,-0.013160706,-0.04901123,-0.031311035,0.022338867,-0.018493652,0.030273438,-0.06958008,-0.01687622,-0.0051116943,0.016708374,0.011299133,-0.007320404,-0.0041656494,0.018508911,0.0066184998,0.008583069,-0.0010414124,-0.041778564,0.019515991,-0.002658844,0.022125244,0.04272461,0.0018596649,0.031677246,0.006126404,-0.011993408,-0.02444458,0.016235352,-0.022949219,-0.012992859,0.0135650635,0.0027980804,-0.0022296906,0.00969696,-0.036865234,0.014427185,-0.045196533,0.055358887,-0.0020389557,-0.010444641,0.018203735,-0.045654297,0.014465332,-0.0061531067,-0.011474609,-0.015159607,0.018188477,0.010917664,0.02923584,-0.01285553,-0.04510498,0.025268555,-0.021362305,-0.020828247,-0.044677734,-0.039764404,0.037902832,-0.021194458,0.028717041,0.040618896,-0.07989502,-0.0037059784,-0.03353882,0.01927185,-0.014862061,-0.004512787,0.0071525574,0.04446411,-0.022827148,-0.006008148,-0.0234375,-0.031036377,0.0058250427,0.026977539,-0.029129028,0.034454346,-0.0040512085,0.02128601,0.015068054,0.0054359436,0.027954102,0.046936035,-0.0011024475,-0.07543945,-0.08654785,-0.018585205,-0.01083374,-0.020248413,-0.019699097,-0.0015001297,-0.01902771,-0.048034668,-0.014724731,-0.018875122,0.006046295,-0.06414795,-0.011886597,-0.036132812,0.017074585,0.0018749237,-0.068115234,-0.023406982,-0.010154724,0.0579834,0.02053833,0.023254395,0.029968262,-0.015945435,0.06738281,0.028274536,-0.025939941,-0.018112183,0.040008545,-0.023345947,0.021575928,0.003118515,0.006752014,-0.02619934,0.041870117,0.051879883,0.014877319,-0.034973145,-0.013183594,-0.059051514,-0.04348755,-0.041381836,0.01651001,0.027282715,0.0035247803,0.040924072,-0.032104492,-0.026641846,-0.010772705,0.02218628,0.03149414,0.05130005,0.011299133,0.0033950806,0.032592773,0.010032654,-0.055389404,0.034698486,0.044067383,0.006702423,-0.010032654,-0.029037476,0.037994385,0.025634766,-0.028503418,0.0066108704,-0.013809204,0.030899048,-0.0065307617,0.0010194778,0.021453857,-0.017578125,-0.02305603,-0.022445679,-0.01576233,0.01789856,0.0027160645,-0.028366089,-0.033569336,-0.09057617,0.053863525,0.03024292,0.038024902,-0.009216309,0.018859863,-0.051696777,-0.015205383,-0.04916382,0.041656494,0.062286377,0.0017032623,-0.020050049,0.02557373,-0.020050049,-0.042877197,0.008583069,-0.024291992,-0.023925781,-0.011222839,0.037200928,-0.051361084,-0.011749268,0.018173218,0.025024414,0.044525146,-0.027023315,-0.03265381,-0.012016296,-0.005783081,0.015899658,-0.020980835,0.005592346,-0.015327454,0.040618896,0.008506775,-0.00818634,0.022155762,-0.0067329407,-0.004585266,-0.013053894,0.017150879,-0.0115737915,-0.024917603,0.022247314,0.013206482,-0.04776001,-0.0022468567,-0.012611389,0.07312012,-0.047088623,0.03366089,-0.006137848,-0.008338928,0.03942871,0.008262634,-0.05493164,0.00058221817,0.03756714,0.019989014,0.052368164,0.0073547363,-0.026123047,-0.024246216,0.08477783,0.00014424324,-0.0096588135,0.009780884,0.012702942,0.03378296,-0.01146698,-0.041931152,-0.036743164,-0.0011978149,-0.034729004,0.036987305,-0.018951416,0.014053345,-0.009895325,0.015991211,-0.025344849,0.008956909,-0.041259766,0.0055885315,-0.0079422,0.009338379,-0.014373779,0.00082826614,0.011672974,0.0023536682,0.010169983,0.01713562,0.038116455,0.0012083054,-0.005508423,-0.034576416,-0.024383545,0.013221741,-0.0030288696,0.028549194,0.010940552,0.013725281,0.04071045,-0.033843994,0.0014896393,0.023147583,0.029037476,0.022598267,-0.014137268,-0.0038795471,-0.07208252,-0.03656006,-0.02947998,-0.061309814,0.03503418,0.038391113,-0.000767231,0.05987549,0.013648987,-0.030838013,-0.048553467,0.0236969,-0.044708252,0.001537323,0.027435303,-0.011909485,-0.033843994,0.0036582947,-0.015403748,0.010253906,0.036743164,0.034332275,0.033935547,0.07281494,0.049072266,0.012237549,0.018081665,0.012893677,0.0340271,0.0035076141,-0.016281128,-0.049560547,-0.018478394,0.022262573,-0.026397705,-0.017333984,-0.07861328,0.054382324,0.055633545,0.07879639,0.022750854,0.009338379,0.041809082,-0.025558472,0.0065231323,-0.04751587,-0.0158844,0.0011806488,-0.04727173,0.03289795,-0.008895874,0.0055656433,-0.029663086,0.029647827,-0.01071167,0.020935059,-0.03881836,0.055114746,-0.0029354095,0.0049476624,0.027420044,0.0032043457,0.051757812,0.068847656,-0.042297363,0.023925781,0.03164673,-0.023529053,0.01184845,0.04260254,-0.019226074,-0.014831543,-0.049194336,-0.037200928,-0.008056641,-0.018997192,-0.040771484,-0.01008606,0.010543823,0.018417358,0.021377563,-0.024490356,-0.02267456,0.014137268,-0.0014715195,-0.042877197,0.0064201355,-0.04901123,0.013809204,0.027267456,-0.031433105,-0.0036334991,-0.015419006,-0.0041122437,-0.029312134,0.0068893433,0.031341553,-0.004047394,-0.050598145,0.03451538,0.0001487732,0.015068054,0.008300781,0.041412354,0.0129852295,0.040100098,0.045288086,0.0023784637,-0.0054740906,-0.056610107,0.020431519,-0.055725098,0.0018033981,0.030517578,-0.036956787,0.004425049,-0.013496399,-0.03753662,-0.012023926,-0.0017709732,-0.044799805,-0.006046295,0.01222229,-0.008804321,-0.026763916,-0.036590576,-0.027816772,-0.010749817,0.064208984,0.017471313,0.00023460388,-0.05987549,-0.02053833,0.033050537,0.0014438629,0.04083252,-0.016036987,-0.013008118,-0.017105103,-0.03540039,0.01360321,-0.014564514,0.037994385,0.001616478,-0.015083313,0.014862061,0.03286743,0.023239136,0.0007200241,0.0028476715,0.036193848,-0.021331787,0.00004053116,-0.01737976,0.046203613,0.027923584,-0.012199402,-0.051605225,0.028884888,0.0073776245,0.029968262,-0.030563354,0.0010137558,-0.0059928894,0.016647339,0.005115509,-0.020553589,-0.012649536,-0.017471313,-0.043670654,-0.07952881,0.046020508,-0.01461792,0.021118164,0.029312134,0.00995636,0.025314331,-0.0146865845,-0.0074768066,0.027328491,-0.020385742,-0.017486572,-0.025680542,-0.02130127,-0.01890564,-0.025161743,-0.02067566,0.020935059,-0.024810791,0.015487671,0.0019874573,-0.01134491,0.0056915283,0.017715454,-0.008293152,0.021362305,-0.0024795532,0.014793396,0.036621094,0.006576538,-0.04498291,0.015541077,0.0039482117,0.009864807,0.017486572,0.044952393,0.02267456,-0.0028820038,-0.003074646,-0.0026741028,-0.026748657,-0.025299072,0.009086609,0.014373779,0.008293152,-0.00983429,-0.045837402,0.011711121,-0.0013895035,-0.033355713,-0.022506714,0.022979736,0.024749756,-0.025894165,0.0035896301,0.02696228,0.043945312,-0.020599365,0.004047394,0.0020751953,0.034057617,0.030288696,0.010101318,-0.0061531067,0.024642944,-0.0024814606,0.011016846,-0.007972717,-0.0119018555,0.033111572,-0.006427765,0.030166626,0.008148193,-0.0020217896,-0.017227173,-0.017288208,0.0069503784,-0.005962372,-0.021255493,0.018127441,0.027801514,0.04324341,-0.034606934,0.018508911,0.009109497,-0.028823853,-0.01991272,0.0034999847,0.03829956,-0.020111084,-0.01802063,0.021713257,0.013221741,0.02760315,-0.043762207,-0.008033752,-0.0036334991,0.017837524,-0.02810669,-0.054870605,-0.036834717,-0.00033950806,0.04208374,0.011657715,0.026473999,0.028167725,-0.004108429,0.014633179,0.020431519,-0.0008087158,-0.009269714,-0.015434265,-0.039855957,0.012397766,0.0028152466,-0.0040130615,-0.0413208,0.0035381317,-0.014953613,-0.02734375,-0.012992859,-0.013694763,-0.009689331,-0.015335083,0.018325806,0.036743164,0.0000872612,0.0045776367,-0.016326904,-0.04647827,-0.010177612,0.013801575,0.009277344,-0.039367676,0.013450623,-0.012458801,-0.011428833,0.002565384,0.016418457,0.012184143,0.021011353,0.0071029663,0.030944824,-0.03665161,0.040893555,-0.015541077,0.01210022,-0.0039253235,-0.032226562,-0.031311035,-0.02017212,-0.016616821,0.03994751,-0.016967773,-0.007904053,-0.027954102,-0.034210205,-0.0032577515,-0.047027588,0.021011353,0.05596924,0.038970947,-0.010749817,0.0020809174,0.0062789917,-0.0077590942,-0.018493652,0.006298065,-0.003698349,0.039276123,0.020050049,0.0022449493,-0.040374756,-0.013725281,-0.026351929,0.0007343292,-0.052612305,-0.053375244,-0.005680084,0.004055023,-0.01033783,0.010055542,-0.014099121,-0.026062012,-0.007320404,-0.05166626,0.017028809,0.0007119179,0.0032424927,0.0022277832,-0.034698486,-0.009651184,0.012245178,-0.020996094,0.041870117,0.0066184998,-0.019973755,-0.031219482,0.0043640137,0.02508545,0.023498535,-0.0082473755,-0.023590088,0.009178162,-0.020507812,-0.056396484,-0.013458252,0.0017910004,-0.004627228,-0.010124207,0.002571106,-0.055114746,0.0008792877,-0.03265381,-0.0039367676,0.012069702,0.01763916,0.0021686554,0.013336182,0.014015198,-0.0030994415,0.014572144,-0.04046631,-0.0014591217,0.012084961,0.008613586,0.02218628,0.051086426,-0.013084412,-0.024841309,0.0051956177,-0.00087070465,0.02116394,-0.019683838,0.020050049,-0.004245758,0.0061950684,0.0041770935,-0.012390137,-0.016052246,-0.0059394836,0.08770752,-0.0011320114,-0.0054473877,-0.007911682,-0.020401001,0.020446777,0.031082153,-0.033172607,-0.00021266937,-0.029754639,0.013282776,-0.017730713,0.024520874,-0.00026869774,0.023635864,-0.0143966675,-0.044799805,-0.02482605,0.0010757446,-0.010848999,-0.06842041,-0.029968262,-0.05834961,-0.009231567,-0.024291992,-0.020736694,-0.0058517456,0.018692017,-0.030044556,-0.08483887,0.009933472,0.03237915,0.001991272,0.023757935,-0.0029735565,0.011878967,0.00831604,-0.05029297,0.008934021,0.032806396,-0.033477783,-0.018127441,-0.0050582886,0.008117676,-0.012260437,-0.0016613007,0.0020713806,0.008277893,0.00049972534,-0.014823914,0.01361084,-0.01675415,0.017852783,-0.021957397,0.0066833496,-0.018630981,-0.008743286,0.043670654,-0.051971436,0.032196045,0.017318726,-0.0033855438,-0.0036640167,0.016586304,0.035705566,-0.041290283,-0.012199402,0.020446777,0.0034160614,0.026641846,-0.02003479,0.041137695,0.008964539,-0.01979065,0.000050663948,-0.01586914,-0.010719299,-0.03289795,-0.037628174,0.017410278,-0.0041923523,0.017684937,-0.018585205,-0.008705139,0.018066406,0.017364502,0.0015478134,-0.013160706,-0.0138168335,-0.029144287,0.0066452026,-0.0023174286,-0.0011930466,-0.016921997,0.022125244,0.012390137,0.03753662,0.0076026917,-0.004421234,-0.0040130615,0.029129028,-0.0035305023,0.0010595322,0.014930725,0.012672424,0.022476196,0.016738892,0.0054244995,-0.041137695,-0.01689148,-0.029144287,-0.024551392,0.013435364,-0.007865906,-0.0064315796,0.0029678345,0.011230469,-0.009963989,-0.03213501,0.002368927,-0.0395813,-0.025497437,0.009185791,-0.03756714,0.025039673,0.022216797,0.0022716522,0.0075416565,0.0042419434,0.041290283,-0.0017776489,-0.005470276,0.04031372,0.029144287,0.016647339,-0.027954102,0.0072746277,-0.016677856,-0.0070610046,-0.00001257658,-0.022476196,-0.010177612,0.03353882,-0.018173218,-0.0020179749,0.014862061,0.00831604,-0.012046814,0.009216309,0.009628296,0.015213013,-0.0079956055,0.042755127,-0.04348755,0.037261963,0.019470215,-0.002691269,-0.026275635,-0.004924774,-0.02619934,0.0095825195,0.006084442,-0.009391785,0.04043579,0.0031261444,0.029205322,-0.018692017,-0.009002686,0.00020730495,-0.027420044,-0.009864807,0.032043457,-0.009231567,-0.012886047,0.008613586,-0.027709961,0.03555298,-0.046203613,0.027114868,0.0016126633,-0.008415222,0.0043754578,-0.027282715,-0.01902771,-0.0021591187,-0.009498596,-0.00071525574,-0.002243042,0.04345703,0.019058228,0.044769287,0.050842285,0.011627197,-0.0031032562,-0.037841797,-0.03137207,0.0029678345,-0.016555786,0.03982544,-0.01033783,0.03756714,0.038391113,0.001537323,0.029418945,0.031280518,0.032562256,0.01979065,0.015213013,-0.007873535,0.007205963,-0.000015258789,0.02696228,-0.0056648254,0.039733887,-0.03970337,0.019638062,0.010414124,0.021606445,-0.014442444,0.044036865,0.07647705,0.012306213,-0.010696411,0.049194336,-0.008674622,-0.021820068,-0.0099105835,-0.027679443,0.042297363,0.013320923,0.047943115,0.04736328,0.010292053,0.0022602081,0.021362305,-0.021408081,-0.02709961,0.04849243,0.028762817,-0.017242432,-0.0070762634,-0.005264282,0.004722595,-0.037597656,-0.02330017,0.012954712,-0.015792847,0.0052986145,-0.014640808,0.00085639954,-0.0079956055,0.0056152344,0.028625488,0.011329651,-0.002779007,0.027999878,0.011291504,-0.008079529,0.026260376,0.0042304993,0.027069092,-0.037597656,-0.013938904,0.003534317,0.019485474,-0.014122009,-0.01739502,0.008354187,0.015090942,0.04864502,0.037231445,-0.024139404,0.007843018,0.028579712,0.02407837,0.01007843,0.05441284,0.027160645,0.011024475,0.02645874,0.036743164,0.033813477,-0.028579712,0.010345459,0.0020713806,0.025146484,-0.0030651093,-0.008850098,0.003736496,-0.014137268,0.0079422,-0.006336212,-0.009254456,0.032562256,0.016708374,-0.018005371,-0.019241333,-0.0020885468,0.0010528564,-0.01386261,-0.0054626465,0.004337311,-0.017929077,0.027877808,0.018325806,0.032562256,-0.01914978,0.026351929,0.0071029663,-0.018798828,0.003780365,0.022537231,-0.045715332,0.01386261,-0.00051164627,-0.005874634,-0.04434204,0.017791748,0.019454956,-0.012840271,0.024551392,0.00970459,-0.009155273,-0.00087213516,0.030273438,0.019424438,0.0014362335,-0.0025501251,-0.020385742,0.03552246,0.048980713,-0.0020523071,-0.0023612976,-0.014411926,-0.010299683,-0.0051193237,-0.011497498,-0.009315491,-0.0026474,-0.018371582,-0.024658203,0.015327454,0.03527832,0.0054473877,0.04562378,-0.020980835,0.003118515,0.0032730103,0.040405273,0.0013360977,-0.0048446655,-0.008934021,0.008766174,-0.022705078,0.045684814,0.026229858,0.016433716,0.038024902,-0.0095825195,-0.011405945,0.000059127808,-0.007171631,0.025344849,-0.022842407,0.008140564,-0.0026760101,0.0131073,-0.014968872,-0.04095459,0.011619568,-0.010932922,-0.017059326,-0.021743774,-0.0015382767,0.013542175,0.027297974,0.02909851,0.036743164,-0.017822266,0.06890869,0.006706238,0.05633545,-0.0069885254,-0.017105103,0.04486084,0.018737793,0.034210205,0.017074585,0.025238037,-0.016464233,0.029800415,0.021377563,0.027328491,0.016555786,0.013931274,-0.010856628,0.034729004,-0.007171631,0.029663086,-0.0070152283,0.0104522705,0.021896362,0.0017976761,-0.018692017,-0.0033950806,-0.00083494186,0.011451721,0.028137207,-0.025848389,-0.011871338,-0.019500732,-0.011978149,0.034606934,-0.016021729,-0.0031051636,-0.0021781921,-0.0057868958,0.010284424,-0.022521973,-0.025772095,0.013519287,0.019683838,-0.057647705,-0.013412476,0.0062446594,0.007041931,-0.024017334,0.027191162,0.016937256,0.0031661987,-0.00012254715,0.051727295,-0.0071983337,0.031463623,-0.015808105,0.032165527,0.047424316,0.00223732,-0.019866943,0.0012874603,0.0024662018,-0.012763977,0.015052795,0.033691406,-0.016540527,-0.0055236816,0.0014286041,-0.018371582,0.0038661957,-0.0048217773,-0.013145447,0.0090789795,-0.012138367,-0.012298584,-0.020721436,0.008422852,-0.0067596436,0.012901306,-0.014221191,-0.017181396,0.017211914,0.037719727,0.0033988953,-0.031051636,-0.019241333,0.0017623901,0.0082092285,-0.0289917,-0.018325806,-0.0031738281,-0.04119873,0.0036773682,0.0037212372,0.010368347,0.018127441,-0.02017212,0.0021362305,0.024246216,0.008758545,0.02104187,0.0045051575,0.0022640228,0.012161255,-0.016952515,0.0018205643,-0.01777649,-0.018951416,0.013580322,0.031982422,0.009475708,-0.017944336,0.025039673,-0.0009570122,0.013374329,-0.012046814,-0.02166748,0.029373169,-0.015571594,-0.012527466,-0.0027599335,0.02218628,-0.013595581,-0.007896423,-0.009727478,0.04510498,0.05444336,-0.008491516,-0.0102005005,0.034820557,0.018981934,0.0007662773,0.045715332,0.0071792603,0.049072266,0.018844604,-0.031311035,-0.030212402,0.021697998,-0.002067566,-0.0020389557,0.019592285,-0.021957397,-0.024917603,0.0053634644,0.014930725,-0.005657196,-0.027130127,-0.0104599,-0.023269653,-0.02116394,0.011871338,-0.00894928,0.013092041,-0.016586304,-0.020721436,0.009178162,-0.024032593,-0.056762695,-0.017501831,-0.0029144287,-0.01991272,-0.05517578,0.01828003,-0.02418518,0.010749817,-0.0317688,-0.0014343262,-0.018066406,0.026992798,-0.0068588257,0.0055885315,0.024917603,0.019058228,0.021499634,-0.00048065186,0.025131226,-0.032043457,-0.030166626,-0.019638062,0.0077934265,-0.008026123,0.023162842,-0.0024108887,0.030792236,0.021728516,-0.011268616,0.0019016266,-0.009216309,-0.015213013,-0.013900757,-0.029968262,-0.016586304,0.02746582,0.012321472,0.0003991127,-0.014793396,0.033477783,-0.018112183,-0.004798889,0.036590576,0.043670654,0.007545471,0.022872925,-0.015144348,-0.0042419434,-0.015670776,-0.0013246536,-0.0116119385,-0.0039863586,0.0044021606,-0.011054993,-0.0066337585,0.009506226,0.023086548,-0.012664795,-0.02180481,0.026245117,0.0058174133,-0.006214142,0.030929565,0.012458801,0.010536194,-0.0048217773,-0.010726929,0.010261536,0.06008911,0.017654419,-0.0011110306,-0.00137043,0.0025253296,-0.009033203,0.009857178,0.008255005,-0.028060913,-0.03982544,-0.00932312,-0.023895264,0.026916504,-0.00052690506,0.008491516,-0.0066566467,0.013168335,0.0062065125,-0.04031372,-0.007484436,0.018127441,0.023391724,-0.012130737,-0.017105103,-0.0033435822,0.0058670044,-0.027236938,-0.015731812,-0.033935547,-0.053497314,-0.00043678284,-0.024108887,0.025299072,0.006526947,-0.017990112,-0.0027980804,-0.0018558502,0.0054359436,0.010818481,0.023330688,-0.014450073,-0.0011720657,0.030807495,0.027923584,-0.01838684,0.02041626,-0.026123047,-0.0067443848,0.018936157,-0.0033283234,0.013412476,-0.036712646,0.029693604,-0.013801575,-0.0098724365,0.026855469,-0.00083494186,0.02255249,-0.038085938,-0.00006508827,0.0035934448,-0.0011978149,0.033416748,-0.014915466,-0.031311035,-0.0051727295,-0.01838684,-0.025222778,0.009811401,0.016052246,0.049743652,-0.011756897,0.030944824,-0.02558899,-0.011962891,0.015899658,0.011108398,-0.015899658,0.0077171326,0.024154663,0.0013370514,0.0027389526,-0.01600647,-0.0090789795,-0.024353027,-0.0028495789,0.028823853,-0.0037765503,0.003145218,0.035736084,0.017913818,0.050964355,0.0020217896,0.018035889,0.008560181,-0.0075416565,0.022766113,0.007736206,0.05078125,0.0019607544,-0.023422241,0.015136719,0.0059890747,-0.04815674,-0.0024261475,-0.009559631,0.005809784,-0.032043457,0.026824951,-0.005962372,0.016784668,-0.0116119385,0.020248413,-0.02746582,-0.006980896,-0.034606934,-0.0016021729,-0.030807495,-0.00016212463,0.02078247,-0.0028762817,0.02130127,0.006652832,-0.024597168,0.0209198,0.039642334,-0.01473999,-0.032562256,-0.021911621,0.017868042,-0.00096035004,0.023147583,0.0024852753,-0.02709961,-0.018249512,0.00067567825,-0.02029419,0.02053833,-0.011795044,0.02053833,0.01940918,-0.012001038,-0.008483887,0.027908325,-0.009063721,-0.0038032532,0.009468079,0.003660202,0.035339355,0.02746582,-0.010749817,0.0184021,0.019195557,-0.05029297,0.0579834,0.0017976761,0.032348633,-0.021118164,-0.0004222393,-0.035247803,-0.031463623,-0.01146698,0.0052986145],"createdAt":"2026-04-21T18:32:24.474Z","updatedAt":"2026-04-22T05:32:13.702Z","lastSeenAt":"2026-04-22T05:32:13.702Z","tsv":"'/api/v1/lab/results/64':62,175 '/request':11,26 '0.02':10,25,93,169 '000':82 '0x8335':87 '20':81 '2913':88 '402':211 '6':98 'Base network API' 'USDC pay-per-call' 'accept':70 'access':42,68 'across':127 'actual':232 'advertis':76 'ai':137 'analysi':141 'analyt':131 'api':5,20,38,67,101 'appear':176 'attach':110 'avail':230 'base':8,23,57,83,90 'behind':49 'beyond':221 'broad':45 'broader':123 'call':4,19,95 'caller':108 'categori':129 'challeng':75,212 'classif':144 'convers':161 'cost':79 'data':130,134,233 'decim':99 'document':220 'embed':145 'endpoint':48,61,126,164,174,202,204,237 'equal':92 'estim':155 'exact':191 'exampl':227 'exchang':150 'experiment':199 'explicit':184 'export':135 'feed':149 'financ':146 'four':128 'function':192 'gas':154 'gate':41 'generat':162 'geocod':159 'header':115 'homepag':188,223 'howev':213 'infrastructur':157 'insight':136 'intern':201 'json-response' 'key':102 'lab results API' 'lab/results':179 'learn':139 'limit':105 'list':64,185,224 'live':206 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':138 'maximum':78 'may':196 'metric':132 'micropay':51 'micropayment API' 'network':9,24,58 'no-api-key' 'offer':125 'openapi':217 'particular':173 'path':180 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payload':229 'payment':15,30,114,120 'per':3,18,36,94,170 'platform':6,21,39,124 'post':71 'post-method' 'premium':66 'premium API access' 'price':148,167 'proof':121 'proper':210 'quot':153 'rate':104,151 'report':133 'request':37,72,171 'request/response':228 'requir':107 'return':208,234 'schema':218 'sentiment':140 'set':46 'settl':52 'simpli':109 'specif':60 'summar':143 'text':142 'token':152 'unclear':194 'uniform':166 'unit':84 'unknown':239 'usdc':14,29,54,86,96 'usdc-base-network' 'use':97 'util':158 'valid':118,160 'via':12,27 'web3':147 'x':113 'x-payment':112 'x402':13,28,50,74,119 'x402 endpoint' 'x402-payment'","prices":[{"id":"ed25d8cc-26fb-4330-bab8-c830dc043b92","listingId":"8bb5c315-a7e7-4a3b-bfd0-9353fc8e16f7","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/lab/results/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.474Z"}],"sources":[{"listingId":"8bb5c315-a7e7-4a3b-bfd0-9353fc8e16f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/64","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.474Z","lastSeenAt":"2026-04-22T05:32:13.702Z"}],"details":{"listingId":"8bb5c315-a7e7-4a3b-bfd0-9353fc8e16f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/64 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/64"},{"claim":"All listed endpoints 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":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing gated data or results via a single micropayment without account signup","Integrating pay-per-call APIs into autonomous agent workflows","Testing x402 payment flows against a low-cost live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that need keyless, pay-as-you-go API access","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume batch processing where per-request costs add up","Anyone requiring a well-documented, production-grade data pipeline"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:04.131Z"},"updatedAt":"2026-04-22T05:32:13.702Z"}}