{"id":"e81e0161-eb46-4f7b-aba1-3489462dd16d","shortId":"Wu8kd8","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/8` is listed under the platform's premium access tier. The x402 challenge confirms it accepts POST requests, requires payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, which is 6 decimals = $0.02), and returns application/json responses. No API keys or rate limits are required — access is gated purely by per-request micropayment.\n\nThe platform advertises no minimums, no commitments, and instant access. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality this specific transactions endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but its actual utility is unclear.","tags":[],"capabilities":["x402-payment","per-request-micropayment","usdc-base-network","json-response","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","micropayment API","USDC API access","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs/pricing/README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","Unclear what data or functionality '/api/v1/transactions/8' actually returns","Platform appears to be a demonstration or early-stage project with many advertised endpoints but no substantive docs"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/8","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/transactions/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 challenge, but there is no documentation, no schema, no request/response examples, and no clear description of what the endpoint actually does. The platform pages beyond the landing page are empty (just 'Connect wallet'). 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":"2026-04-19T13:46:43.002Z","embedding":[-0.025344849,-0.030975342,0.04763794,0.017852783,0.013710022,-0.032196045,-0.025543213,0.04537964,0.074523926,-0.07171631,0.02180481,-0.0340271,-0.026885986,-0.036193848,-0.03652954,-0.002243042,-0.011955261,0.010368347,-0.039764404,0.033843994,0.03668213,-0.024139404,-0.024810791,0.034973145,0.0053215027,-0.014312744,-0.016647339,-0.011985779,-0.020233154,-0.03994751,0.04168701,-0.0256958,0.0040512085,0.02458191,-0.015472412,-0.009506226,0.00299263,0.038848877,0.034942627,-0.018081665,0.007255554,-0.06451416,-0.011817932,-0.015289307,-0.046325684,0.007472992,-0.000056266785,-0.027923584,0.0036735535,0.0143966675,-0.044036865,-0.010070801,-0.0071372986,-0.0020427704,0.004322052,-0.0013504028,0.008918762,-0.010643005,0.0031280518,0.008956909,-0.018951416,-0.066223145,-0.01576233,0.0011892319,0.00013697147,0.05529785,-0.014274597,0.042388916,0.013389587,0.055358887,0.036590576,0.044830322,0.016647339,0.02658081,-0.0042495728,0.003271103,0.0025691986,0.07897949,-0.016052246,-0.013824463,-0.011154175,-0.012428284,-0.053863525,0.00053596497,-0.015602112,-0.039916992,-0.022033691,0.0181427,-0.025741577,0.020004272,-0.06341553,-0.006389618,-0.0074691772,0.010307312,0.0009007454,-0.004135132,-0.013389587,0.02609253,-0.023895264,0.015457153,0.018249512,-0.03491211,0.020828247,0.002500534,0.04647827,0.045898438,0.012207031,0.033996582,0.0038547516,-0.0069503784,-0.015899658,0.015701294,0.004119873,-0.011657715,0.018081665,0.005176544,-0.0030670166,0.0054092407,-0.017028809,0.023742676,-0.05038452,0.060913086,0.012290955,-0.009887695,0.006919861,-0.046081543,0.0010719299,0.01626587,-0.032440186,0.0058555603,0.012939453,0.017456055,0.03930664,-0.021392822,-0.030761719,0.014625549,-0.02355957,-0.020065308,-0.047058105,-0.037506104,0.03668213,-0.032287598,0.02204895,0.039916992,-0.103881836,-0.019256592,-0.05126953,0.01020813,-0.032440186,-0.0023918152,0.004688263,0.022155762,-0.021102905,-0.0033836365,-0.02355957,-0.023239136,-0.0003516674,0.045074463,-0.025650024,0.046173096,-0.0013399124,0.023040771,0.013046265,0.017364502,0.019180298,0.027679443,0.004245758,-0.066345215,-0.08703613,-0.019332886,0.012123108,-0.020492554,-0.041748047,0.007511139,-0.009208679,-0.07849121,-0.035247803,-0.01701355,-0.0071983337,-0.04397583,0.0005393028,-0.029968262,0.03164673,-0.012321472,-0.06329346,-0.02684021,-0.031341553,0.07141113,0.023956299,0.0048599243,0.02923584,-0.018341064,0.05239868,0.027679443,-0.017562866,-0.028182983,0.015975952,-0.01739502,0.017089844,0.0035934448,0.003118515,-0.04034424,0.012039185,0.0725708,0.02330017,-0.025405884,0.0045928955,-0.04925537,-0.034362793,-0.036315918,0.010314941,0.017578125,-0.0028762817,0.031051636,-0.024353027,-0.04095459,-0.0054397583,0.010871887,0.023147583,0.056427002,0.0007138252,-0.017059326,0.010269165,0.015281677,-0.042419434,0.046051025,0.03765869,0.018325806,-0.025665283,-0.036865234,0.018203735,0.03186035,-0.032165527,0.0068626404,-0.017333984,0.028289795,-0.0074806213,0.01260376,0.033081055,-0.015792847,-0.01524353,-0.031799316,-0.016601562,0.038269043,0.019607544,-0.022399902,-0.03643799,-0.07458496,0.045166016,0.050354004,0.049865723,-0.0073127747,0.0011911392,-0.025039673,-0.0069503784,-0.07543945,0.057495117,0.06604004,-0.018478394,-0.006160736,0.026016235,-0.008674622,-0.027923584,-0.010040283,-0.016693115,-0.022262573,-0.017227173,0.0042266846,-0.03540039,0.0012598038,0.011009216,0.017150879,0.057434082,-0.0032577515,-0.04144287,-0.030456543,0.00007891655,0.006893158,-0.031707764,0.0012159348,-0.0039596558,0.018875122,0.021957397,-0.006084442,0.022018433,-0.0013942719,0.017700195,-0.0054016113,-0.003501892,-0.030410767,-0.039855957,0.013519287,-0.004219055,-0.06842041,0.009841919,-0.012817383,0.070007324,-0.045959473,0.041534424,-0.023010254,0.011703491,0.06854248,-0.018005371,-0.054779053,0.008094788,0.028747559,0.025344849,0.03857422,0.008148193,-0.033691406,-0.015960693,0.08294678,-0.0046539307,0.0048828125,0.012535095,0.025390625,0.03829956,-0.008911133,-0.07098389,-0.035064697,-0.012130737,-0.035125732,0.014335632,-0.018249512,0.028701782,-0.024154663,-0.0006480217,-0.032592773,-0.0037498474,-0.027679443,0.017532349,-0.030044556,0.0045776367,-0.03387451,-0.014717102,0.027313232,0.008216858,-0.017700195,0.0026836395,0.047424316,0.027832031,-0.006427765,-0.031219482,-0.01687622,-0.0076408386,0.0132751465,0.0126571655,0.020187378,0.024963379,0.050201416,-0.033813477,0.00680542,0.030426025,0.012756348,0.038360596,-0.009841919,0.006389618,-0.060546875,-0.05529785,-0.019927979,-0.04269409,0.024993896,0.0060310364,-0.0049819946,0.049316406,0.0084991455,-0.024169922,-0.03930664,0.01259613,-0.050567627,-0.0011425018,0.040802002,0.0068092346,-0.02558899,-0.0025634766,0.0022506714,-0.00044989586,0.03616333,0.022109985,0.019607544,0.06329346,0.051635742,0.011711121,0.03366089,-0.013771057,0.03262329,-0.0073776245,-0.035461426,-0.03652954,-0.014434814,0.023986816,-0.0021438599,-0.012542725,-0.06732178,0.046325684,0.049072266,0.07928467,0.022094727,0.0039253235,0.027618408,-0.006046295,0.01878357,-0.02798462,-0.024108887,-0.023712158,-0.057861328,0.017227173,-0.0040130615,-0.017318726,-0.013824463,0.020309448,-0.0024337769,0.020080566,-0.02859497,0.04940796,-0.000834465,-0.015914917,0.023483276,0.009010315,0.046020508,0.05770874,-0.029510498,0.032806396,0.027267456,-0.03475952,0.010879517,0.04257202,-0.0048599243,-0.021331787,-0.04071045,-0.029281616,-0.005493164,-0.007865906,-0.03567505,0.007762909,0.008148193,0.028015137,0.021774292,-0.026107788,-0.034301758,-0.0042915344,-0.015205383,-0.041809082,-0.012176514,-0.033294678,0.014053345,0.04800415,-0.022827148,-0.00774765,0.010124207,-0.0005764961,0.0040245056,-0.0031356812,0.0016803741,-0.008270264,-0.051696777,0.02255249,0.009735107,0.021148682,0.013214111,0.018341064,0.010177612,0.020736694,0.06359863,0.008407593,-0.015266418,-0.054748535,0.0034236908,-0.04626465,-0.0012626648,0.007587433,-0.022384644,-0.015670776,-0.012237549,-0.0052871704,-0.029312134,0.013137817,-0.018341064,0.006690979,0.023010254,-0.02859497,-0.032440186,-0.066711426,-0.019332886,0.007255554,0.06726074,0.036346436,-0.006549835,-0.0793457,-0.011489868,0.026168823,0.0011730194,0.013771057,-0.013801575,-0.011833191,-0.013313293,-0.029815674,-0.012382507,-0.014160156,0.020690918,0.0042304993,0.0016670227,0.027450562,-0.0025901794,0.014984131,0.004814148,0.0008559227,0.028518677,-0.01084137,-0.008346558,-0.012893677,0.033477783,0.0082092285,-0.01889038,-0.048828125,0.035369873,0.014923096,0.03930664,-0.03845215,-0.008026123,-0.0045700073,0.01713562,0.009490967,-0.02027893,-0.012664795,-0.006855011,-0.05178833,-0.073791504,0.04324341,-0.018569946,0.028060913,0.017456055,0.008460999,0.022949219,0.0034313202,-0.004837036,0.021911621,-0.02722168,-0.0124435425,-0.025344849,-0.028625488,-0.008079529,-0.0103302,-0.015731812,0.011016846,-0.020095825,0.0065689087,0.010406494,-0.028442383,0.027191162,-0.010803223,0.010810852,0.016448975,0.014945984,0.024368286,0.036956787,0.007873535,-0.036376953,0.025802612,0.0016832352,0.0014076233,-0.0042762756,0.04724121,0.013786316,-0.0066452026,-0.005382538,-0.004547119,-0.021987915,-0.028793335,-0.013145447,0.004753113,0.015586853,0.0020618439,-0.040405273,0.034057617,0.014205933,-0.033355713,-0.022232056,0.025756836,0.0003926754,-0.026763916,0.03137207,0.032287598,0.066711426,-0.017074585,0.008605957,0.005680084,0.035003662,0.032440186,0.020126343,-0.021499634,0.015716553,-0.013008118,0.019256592,-0.00087690353,-0.00605011,0.0026893616,0.006626129,0.023086548,0.024734497,0.0061187744,-0.020187378,-0.034729004,-0.0054016113,-0.00762558,-0.014823914,0.0141067505,0.025268555,0.036224365,-0.0231781,0.020935059,0.01789856,-0.024597168,-0.017837524,-0.018814087,0.04159546,-0.013725281,-0.011505127,0.011894226,0.012313843,0.026367188,-0.05999756,-0.005493164,0.009407043,0.01574707,-0.025497437,-0.042114258,-0.03781128,0.012130737,0.031555176,0.015304565,0.016433716,0.02229309,0.0058631897,0.002626419,0.022460938,-0.0025672913,-0.008338928,-0.016860962,-0.044708252,-0.013336182,0.009529114,-0.0010251999,-0.021469116,0.012046814,-0.0121154785,-0.0124053955,0.004383087,-0.025436401,-0.0045700073,-0.019134521,0.01197052,0.033813477,-0.0024662018,0.007881165,-0.010643005,-0.030227661,0.006919861,0.01713562,0.020706177,-0.039276123,0.02394104,-0.012542725,0.0025348663,-0.006549835,0.013786316,0.027389526,0.021987915,0.0068626404,0.03692627,-0.03744507,0.03491211,-0.034301758,0.0131073,0.0044441223,-0.04095459,-0.005531311,-0.02734375,-0.018417358,0.043823242,-0.02128601,-0.0109939575,-0.03692627,-0.019699097,-0.011833191,-0.04421997,0.009887695,0.035614014,0.038757324,-0.031021118,0.010116577,-0.010681152,0.0058174133,-0.006828308,0.006324768,-0.023162842,0.0309906,0.02456665,0.0053215027,-0.028869629,-0.024475098,-0.023925781,-0.008399963,-0.050079346,-0.035858154,-0.011764526,0.0036830902,-0.012771606,-0.004589081,-0.043914795,-0.019134521,0.0028381348,-0.044281006,0.01209259,0.0010099411,0.020370483,0.002122879,-0.01586914,-0.0036468506,0.019012451,-0.0037345886,0.038513184,0.0045547485,0.0013504028,-0.047576904,0.00944519,0.03488159,0.036376953,-0.0015869141,-0.013763428,-0.0057525635,-0.021377563,-0.055847168,-0.01751709,-0.002691269,-0.012001038,0.00008523464,-0.0014429092,-0.045043945,-0.0018367767,-0.025665283,-0.0034980774,0.023971558,0.016342163,0.023345947,-0.005016327,0.007774353,-0.007633209,-0.017623901,-0.03213501,0.017059326,0.009979248,-0.0038204193,0.014167786,0.057495117,0.006828308,-0.014961243,0.0035648346,-0.0065612793,0.013900757,-0.024429321,0.0037937164,-0.008422852,0.0035991669,-0.016693115,0.000059485435,-0.03137207,-0.0041122437,0.093933105,0.0002837181,-0.011405945,-0.009292603,-0.014335632,0.023483276,0.02128601,-0.032806396,-0.0026569366,-0.026473999,0.021636963,-0.02519226,0.011161804,0.006881714,0.027832031,-0.02331543,-0.06298828,-0.01663208,0.0018892288,-0.0076408386,-0.059906006,-0.013458252,-0.0680542,-0.0019407272,-0.01361084,-0.014465332,0.0066375732,0.00712204,-0.009460449,-0.08514404,0.0054626465,0.041137695,0.009269714,0.031173706,-0.01928711,0.018356323,0.02293396,-0.030578613,-0.020645142,0.028717041,-0.034454346,-0.007827759,-0.032226562,0.02519226,-0.0046920776,-0.019485474,0.013542175,0.010253906,0.021987915,-0.007888794,0.0022659302,-0.011749268,0.012672424,-0.015174866,0.02494812,-0.01499939,-0.019805908,0.02760315,-0.034820557,0.031677246,0.022766113,-0.001991272,-0.0064735413,0.03591919,0.034576416,-0.037139893,-0.009170532,0.02230835,0.006626129,0.03274536,-0.020965576,0.045166016,0.02003479,-0.011260986,0.020202637,-0.012214661,-0.01637268,-0.02949524,-0.028244019,0.018508911,0.006515503,0.02130127,-0.01448822,0.0062026978,0.02319336,0.0040740967,0.019897461,-0.010047913,-0.025756836,-0.025909424,0.006450653,0.014678955,-0.0047569275,0.0045318604,0.022659302,0.020950317,0.04055786,0.013298035,-0.019378662,0.017929077,0.030715942,-0.021987915,0.007411957,0.025177002,-0.011764526,0.015548706,0.015434265,0.0082092285,-0.04849243,-0.018325806,-0.015838623,-0.006778717,0.002456665,0.00016832352,-0.022354126,-0.0075645447,-0.0017538071,0.009002686,-0.038970947,0.0035037994,-0.016952515,-0.04006958,-0.005634308,-0.020339966,0.018173218,0.008148193,0.011428833,0.01525116,-0.0058250427,0.047821045,0.0062217712,-0.011444092,0.036834717,0.03488159,0.010070801,-0.032989502,0.0013942719,-0.010444641,-0.0031490326,0.00945282,-0.024261475,0.015823364,0.03366089,-0.014053345,0.0033054352,0.00497818,0.020568848,-0.011260986,0.00762558,-0.009963989,0.014579773,-0.017791748,0.028030396,-0.04284668,0.010948181,0.02331543,0.00623703,-0.0045661926,-0.01727295,-0.031311035,0.018661499,0.0036411285,-0.017288208,0.046325684,0.0010442734,0.031555176,-0.026123047,-0.014350891,0.006690979,-0.033966064,-0.022888184,0.022567749,-0.0064086914,0.0040740967,0.015419006,-0.0317688,0.040161133,-0.03289795,0.025039673,0.00094795227,0.003967285,-0.022613525,-0.011146545,-0.016052246,-0.023162842,-0.012680054,0.0036125183,-0.0067214966,0.050079346,0.021331787,0.027389526,0.04876709,0.012832642,0.0019054413,-0.038970947,-0.031799316,0.016677856,-0.016799927,0.015602112,-0.022949219,0.052124023,0.044281006,-0.02015686,0.03564453,0.03274536,0.031204224,0.0063819885,0.007865906,-0.018249512,0.016601562,-0.0070343018,0.02003479,0.0038433075,0.042175293,-0.018676758,0.019729614,0.010696411,0.019836426,-0.031051636,0.036834717,0.070617676,0.017089844,-0.012130737,0.0385437,-0.011383057,-0.01373291,-0.011993408,-0.01727295,0.054595947,0.005455017,0.050201416,0.046905518,0.0077934265,-0.0025424957,0.025817871,-0.025283813,-0.022888184,0.064819336,0.026504517,-0.017105103,-0.01309967,-0.013198853,0.0029563904,-0.049682617,-0.032226562,0.009185791,-0.019805908,0.018417358,0.0009803772,0.00806427,-0.013839722,0.026168823,0.029800415,0.015899658,-0.003080368,0.03640747,0.042297363,-0.000320673,0.016021729,-0.006137848,0.022354126,-0.02734375,-0.008804321,0.017471313,0.03164673,-0.0046577454,-0.0041503906,0.021347046,0.00969696,0.060546875,0.041992188,-0.019699097,0.009140015,0.033203125,0.015548706,-0.0021419525,0.032684326,0.031173706,0.009513855,0.030944824,0.041503906,0.029541016,-0.03881836,0.021972656,-0.004131317,0.0011863708,-0.015823364,-0.008079529,0.00055646896,-0.010108948,0.024536133,0.0088272095,-0.018798828,0.021118164,0.015701294,-0.00039601326,-0.004432678,-0.013977051,0.0070228577,-0.017318726,-0.00048041344,0.017929077,-0.020324707,0.033477783,0.0070724487,0.024017334,-0.02897644,0.025634766,-0.0029830933,-0.010643005,-0.0035133362,0.018173218,-0.038024902,-0.0026493073,-0.00844574,0.0037631989,-0.048034668,0.0104522705,0.023483276,-0.010940552,0.02848816,0.008384705,0.0024814606,0.0027618408,0.026397705,0.013160706,-0.0057907104,-0.002866745,-0.022964478,0.036621094,0.04498291,0.014015198,0.009353638,-0.013580322,-0.007583618,0.008323669,-0.007762909,-0.008918762,-0.014472961,-0.028549194,-0.031219482,0.015419006,0.04196167,0.01651001,0.044128418,-0.0034236908,-0.018234253,0.01675415,0.03466797,0.00044846535,-0.006351471,0.000500679,0.022720337,-0.023452759,0.049438477,0.045135498,0.00053691864,0.03378296,-0.008987427,-0.018325806,0.0036773682,-0.0132751465,0.024002075,0.0013751984,0.0023155212,-0.015838623,0.03289795,-0.017532349,-0.037109375,0.010627747,-0.020355225,-0.01084137,-0.02357483,0.0019836426,0.008666992,0.025039673,0.037139893,0.013710022,-0.02482605,0.059631348,-0.020309448,0.039398193,-0.004234314,-0.0051841736,0.055847168,0.027496338,0.041229248,0.016540527,0.023330688,-0.031173706,0.020721436,0.031341553,0.01902771,0.017547607,-0.0031490326,-0.018096924,0.033416748,0.0046958923,0.032409668,-0.011642456,0.0025291443,0.016204834,-0.0027313232,-0.006515503,-0.00434494,-0.0124053955,0.01134491,0.0446167,-0.03665161,-0.008148193,-0.024337769,-0.0077056885,0.029693604,-0.0052452087,0.003293991,-0.001039505,-0.020706177,0.02293396,-0.026062012,-0.012290955,-0.0013742447,0.02909851,-0.047180176,-0.01789856,0.0026302338,0.01361084,-0.02204895,0.024993896,0.016723633,0.0074691772,0.010406494,0.04638672,-0.010360718,0.037719727,-0.005214691,0.025756836,0.020095825,0.0019369125,-0.027008057,0.010253906,0.0035076141,-0.022384644,0.01234436,0.041503906,-0.016677856,0.006866455,-0.005050659,-0.012611389,0.014526367,0.004901886,-0.007835388,0.006263733,-0.010505676,-0.013847351,0.0019464493,0.0056762695,-0.005252838,0.0015134811,-0.00415802,-0.012451172,0.02268982,0.03265381,0.013885498,-0.035461426,0.00036668777,0.008232117,0.0021686554,-0.011077881,-0.023880005,-0.011123657,-0.03515625,0.013137817,0.006465912,-0.0008506775,0.014770508,-0.026367188,-0.010429382,0.024810791,0.009590149,0.016204834,0.0035037994,0.00818634,0.02230835,-0.01902771,-0.0072135925,-0.0095825195,-0.008758545,0.020431519,0.015701294,-0.0052223206,-0.027313232,0.020690918,-0.0050201416,0.025268555,0.007858276,-0.013977051,0.018630981,-0.015380859,-0.012756348,0.010772705,0.020202637,-0.011703491,-0.011932373,-0.016036987,0.01612854,0.058776855,-0.00894165,-0.0065612793,0.018997192,0.008590698,0.013465881,0.032592773,0.01725769,0.042877197,0.035064697,-0.015960693,-0.016921997,0.025253296,-0.015113831,-0.031402588,0.01272583,-0.010749817,-0.01776123,0.027450562,0.014823914,0.00023400784,-0.032958984,-0.012550354,-0.0034599304,-0.025680542,0.00907135,-0.021469116,0.008224487,-0.02798462,-0.017471313,0.009170532,-0.018249512,-0.04449463,-0.024902344,-0.017028809,-0.01259613,-0.037109375,0.00844574,-0.031463623,0.012931824,-0.027694702,-0.0023975372,-0.0008225441,0.025756836,-0.019119263,-0.0113220215,-0.004322052,0.028747559,0.019683838,0.017166138,0.022872925,-0.015777588,-0.03945923,-0.029251099,-0.0012102127,-0.008453369,0.029281616,-0.011123657,0.036956787,0.012870789,-0.009788513,-0.0048942566,-0.0057868958,0.004398346,-0.011001587,-0.020477295,-0.014503479,0.011070251,0.015563965,-0.009933472,-0.010360718,0.044647217,-0.024932861,-0.02406311,0.021606445,0.03930664,0.017837524,0.036376953,-0.021316528,-0.0011148453,-0.0077667236,0.002368927,-0.008888245,0.009590149,0.0010433197,0.0040016174,-0.0064582825,-0.009742737,0.032073975,-0.005077362,0.0019512177,0.029205322,-0.003686905,-0.011169434,0.030975342,0.0074501038,0.005279541,-0.018737793,-0.01776123,0.021392822,0.0335083,0.020828247,-0.0032176971,-0.01448822,0.0068359375,-0.020370483,0.014717102,0.017227173,-0.017181396,-0.043121338,-0.017608643,-0.032958984,0.014770508,0.00333786,0.008575439,-0.0043678284,0.018951416,-0.02468872,-0.025741577,-0.012321472,0.03503418,0.012817383,-0.021331787,-0.00819397,-0.0038719177,0.022369385,-0.03164673,0.0063667297,-0.047302246,-0.0368042,-0.004207611,-0.020187378,0.018081665,0.008361816,-0.004436493,-0.004131317,-0.007160187,0.00059223175,0.006866455,0.030075073,-0.021621704,-0.00434494,0.022537231,0.018035889,-0.02394104,0.025756836,-0.012489319,-0.002872467,0.008148193,-0.015670776,0.010505676,-0.018127441,0.034820557,0.0026874542,-0.0048332214,0.027618408,-0.005332947,0.015098572,-0.028671265,0.011627197,0.011230469,-0.0051193237,0.033111572,-0.029800415,-0.017471313,0.010116577,-0.020095825,-0.03186035,0.00667572,0.014945984,0.030563354,-0.009338379,0.045898438,-0.017196655,-0.013290405,0.027694702,0.0064582825,-0.017166138,-0.012329102,0.041137695,-0.0068244934,-0.00598526,0.0072135925,-0.024383545,-0.028335571,-0.010314941,0.008850098,-0.009590149,-0.00592041,0.02809143,0.017440796,0.035827637,0.0021820068,0.025268555,0.0121536255,0.0068359375,0.028060913,0.004966736,0.05279541,-0.004558563,-0.02772522,0.015823364,0.006828308,-0.024963379,0.0038452148,-0.010910034,0.006828308,-0.039855957,0.02053833,-0.0066947937,0.03866577,-0.0181427,0.011314392,-0.020904541,-0.014732361,-0.03302002,-0.006996155,-0.02885437,0.013763428,0.034057617,0.011741638,0.019729614,0.0046806335,-0.032836914,0.012794495,0.05126953,-0.0024814606,-0.020507812,-0.016815186,0.010108948,0.0028572083,0.007949829,0.0040512085,-0.010147095,-0.024337769,0.00016999245,-0.011856079,0.0051574707,-0.009147644,0.0077667236,0.005241394,-0.009803772,-0.007320404,0.032684326,-0.0015411377,-0.0058135986,0.007472992,-0.005718231,0.031951904,0.028640747,-0.0131073,0.027618408,0.018707275,-0.038208008,0.059295654,0.0012226105,0.029052734,-0.018829346,0.0034751892,-0.036468506,-0.02027893,-0.014198303,0.004928589],"createdAt":"2026-04-18T19:27:04.593Z","updatedAt":"2026-04-24T00:32:40.183Z","lastSeenAt":"2026-04-24T00:32:40.183Z","tsv":"'/api/v1/transactions/8':92 '/request':16,34 '0.02':15,33,79,126 '000':114 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':119 '20':113 '402':208 '6':124 'Base network API' 'USDC API access' 'accept':107 'access':7,25,44,100,139,157 'actual':201,213 'advertis':150 'ai':66 'analyt':65 'api':6,24,43,132,165 'application/json':129 'base':9,27,87,115,121 'call':4,22 'captur':210 'categori':62 'challeng':104,209 'commit':154 'confirm':105,206 'connect':174 'content':180 'data':64,194 'decim':125 'descript':191 'doc':164 'document':159 'endpoint':38,55,75,91,200,204 'exampl':188 'extrem':161 'financ':69 'function':196 'gate':141 'howev':158 'includ':63 'infrastructur':72 'instant':156 'json-response' 'key':133 'learn':68 'limit':136 'list':94 'live':207 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':67 'mani':54 'micropay':147 'micropayment API' 'minimum':152 'network':10,28,88 'no-api-key' 'no-rate-limit' 'offer':56 'one':52 'openapi':184 'page':169 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'payment':48,111 'per':3,21,80,145 'per-request':144 'per-request-micropayment' 'platform':59,97,149 'post':108 'premium':5,23,42,99 'premium API' 'price':77,166 'prompt':176 'protocol':13,31,49 'provid':41 'pure':142 'rate':135 'readm':168 'render':171 'request':81,109,146 'request/response':187 'requir':110,138 'respons':130 'return':128,202 'schema':185 'settl':82 'span':61 'spars':162 'specif':90,198 'substant':179 'tier':101 'transact':199 'unclear':216 'unit':116 'usdc':18,36,84,118 'usdc-base-network' 'util':73,214 'via':11,29,45 'wallet':175 'web3':70 'x402':12,30,47,103 'x402 endpoint' 'x402-payment'","prices":[{"id":"9b03e8b2-d05b-41e5-b126-a8d2149d6f8e","listingId":"e81e0161-eb46-4f7b-aba1-3489462dd16d","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/transactions/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:04.593Z"}],"sources":[{"listingId":"e81e0161-eb46-4f7b-aba1-3489462dd16d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:04.593Z","lastSeenAt":"2026-04-24T00:32:40.183Z"}],"details":{"listingId":"e81e0161-eb46-4f7b-aba1-3489462dd16d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/8 \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/8"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/8"}],"useCases":["Accessing premium data or services without subscription commitments","Agent-driven API consumption with per-call crypto payments","Testing x402 protocol integration with low-cost endpoints"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-use API access","Low-volume consumers who want no subscription overhead"],"notFor":["Users needing detailed API documentation before integration","High-volume consumers who would benefit from bulk pricing","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:36.083Z"},"updatedAt":"2026-04-24T00:32:40.183Z"}}