{"id":"343877fb-c247-4981-a480-33a7608de6ae","shortId":"SJGrpp","kind":"x402","title":"Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base 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. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/transactions/294` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, which is 6 decimals → $0.02) to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The payment timeout is 300 seconds.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/transactions/294` endpoint actually returns or what input it expects beyond being a POST endpoint. The platform advertises many endpoints but provides no technical documentation for any of them.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs/API/pricing/README pages all show only 'Connect wallet'","No OpenAPI or input/output schema provided","Purpose of /api/v1/transactions/294 is unclear — 'Premium API Access' is generic","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/294","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/294","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it expects, or what it returns. No OpenAPI schema, no examples, and the docs pages are empty. The listing is effectively a stub.","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":"2026-04-19T13:05:54.364Z","embedding":[-0.03164673,-0.031951904,0.042419434,0.01374054,0.007820129,-0.029769897,-0.01939392,0.03845215,0.07873535,-0.07763672,0.0076904297,-0.03793335,-0.02859497,-0.052825928,-0.035064697,0.01121521,-0.0033931732,0.01890564,-0.04812622,0.038879395,0.032226562,-0.035186768,-0.024841309,0.036254883,0.0005617142,-0.01033783,-0.021072388,-0.0062217712,-0.021011353,-0.055114746,0.041229248,-0.023498535,0.0065345764,0.017440796,-0.021087646,-0.008850098,0.0026626587,0.04522705,0.038604736,-0.015609741,0.0032672882,-0.058166504,-0.012031555,-0.011291504,-0.04244995,0.0098724365,0.00047802925,-0.029876709,-0.0047950745,0.01360321,-0.04083252,-0.00894165,-0.008758545,0.0046844482,0.006374359,0.0042800903,0.006641388,-0.007709503,0.0049209595,0.011024475,-0.008880615,-0.06793213,-0.019439697,-0.01776123,-0.007881165,0.05609131,-0.018051147,0.045806885,0.013183594,0.050964355,0.046447754,0.047576904,0.03643799,0.025421143,-0.0018796921,0.0059165955,0.00856781,0.07244873,-0.010696411,-0.01574707,-0.018432617,-0.008781433,-0.06072998,0.0033111572,-0.022125244,-0.037628174,-0.013702393,0.024047852,-0.016433716,0.010948181,-0.06866455,0.0025959015,-0.006454468,0.013572693,0.0012779236,-0.002336502,-0.024414062,0.0234375,-0.024047852,0.021514893,0.010627747,-0.042419434,0.020324707,0.016143799,0.039489746,0.043792725,0.017730713,0.02885437,0.0005979538,-0.0028915405,-0.026641846,0.026947021,-0.008483887,-0.020874023,0.018692017,0.011177063,-0.0050964355,0.007686615,-0.016647339,0.02027893,-0.051483154,0.044708252,0.008735657,-0.017440796,0.00894928,-0.054656982,-0.016937256,0.007282257,-0.033325195,0.005886078,0.01448822,0.01146698,0.033599854,-0.015434265,-0.025924683,0.0070877075,-0.021484375,-0.020492554,-0.045837402,-0.027633667,0.039855957,-0.032684326,0.015945435,0.04031372,-0.10247803,-0.01335907,-0.05871582,0.008598328,-0.036590576,-0.010215759,0.0129852295,0.01763916,-0.03302002,-0.0056991577,-0.02116394,-0.022125244,0.003686905,0.036132812,-0.029006958,0.04510498,0.002073288,0.028701782,0.0077285767,0.0054626465,0.030075073,0.028900146,-0.007774353,-0.060913086,-0.08453369,-0.018051147,0.024276733,-0.030914307,-0.048553467,0.009391785,-0.011680603,-0.0769043,-0.043029785,-0.011047363,-0.012641907,-0.032836914,0.00076007843,-0.03201294,0.018630981,-0.0131073,-0.064086914,-0.029953003,-0.02961731,0.07385254,0.031829834,-0.0011701584,0.031799316,-0.01474762,0.048339844,0.022979736,-0.012039185,-0.03466797,0.010345459,-0.014045715,0.012863159,0.011940002,0.005252838,-0.04284668,0.016479492,0.06915283,0.007385254,-0.021453857,0.0031166077,-0.03829956,-0.038269043,-0.03805542,0.0112838745,0.014373779,0.0044822693,0.025787354,-0.023986816,-0.03982544,-0.008834839,0.010368347,0.010986328,0.049835205,0.012435913,-0.016708374,0.01763916,0.020004272,-0.031173706,0.05029297,0.040130615,0.017425537,-0.02911377,-0.032409668,0.021255493,0.039489746,-0.028213501,0.017822266,-0.014122009,0.03112793,-0.0016536713,0.020126343,0.032409668,-0.009796143,-0.018127441,-0.027633667,-0.010894775,0.036895752,0.019866943,-0.015975952,-0.03970337,-0.077941895,0.050842285,0.039031982,0.04748535,-0.011253357,0.0047302246,-0.02798462,-0.0050849915,-0.075683594,0.059143066,0.06695557,-0.016586304,-0.0037670135,0.015625,-0.021026611,-0.030822754,-0.012191772,-0.0134887695,-0.027511597,-0.01687622,0.0012388229,-0.04675293,-0.0054244995,0.018844604,0.011642456,0.049041748,0.00233078,-0.0473938,-0.028198242,-0.007041931,0.016586304,-0.027328491,-0.002368927,0.004295349,0.019302368,0.022201538,-0.008026123,0.025619507,0.00248909,0.009895325,-0.0061073303,0.00057697296,-0.024368286,-0.042877197,0.01625061,-0.01802063,-0.05404663,0.009757996,-0.009170532,0.06329346,-0.047607422,0.044281006,-0.020004272,-0.002128601,0.064453125,-0.011787415,-0.050872803,0.014770508,0.027435303,0.022277832,0.036834717,0.014289856,-0.033935547,-0.0104599,0.076171875,-0.0022506714,-0.00082683563,0.015975952,0.019256592,0.030685425,-0.003929138,-0.06500244,-0.031829834,-0.016235352,-0.031707764,0.01423645,-0.010475159,0.033203125,-0.025283813,-0.00869751,-0.0284729,-0.013572693,-0.028137207,0.017715454,-0.035614014,0.0104522705,-0.03225708,-0.018096924,0.027862549,0.008972168,-0.016113281,0.0012216568,0.053131104,0.025039673,-0.008842468,-0.031585693,-0.02142334,-0.015586853,0.007461548,0.019073486,0.026977539,0.011260986,0.04296875,-0.04522705,0.019973755,0.03463745,0.0090789795,0.0440979,0.0008301735,0.004058838,-0.066833496,-0.049194336,-0.022872925,-0.037017822,0.028884888,0.014709473,-0.012359619,0.059448242,0.014350891,-0.024520874,-0.04159546,0.011955261,-0.05291748,-0.0138549805,0.037078857,-0.0058250427,-0.015670776,-0.008956909,-0.009925842,-0.005279541,0.031433105,0.019363403,0.019943237,0.06304932,0.04333496,0.013793945,0.031341553,0.0010519028,0.025909424,-0.0052948,-0.026184082,-0.022827148,-0.011627197,0.025741577,-0.008491516,-0.015167236,-0.058166504,0.05026245,0.04815674,0.08416748,0.023422241,-0.0059928894,0.034088135,0.0028533936,0.005657196,-0.015068054,-0.021438599,-0.019454956,-0.04095459,0.019088745,-0.0016860962,-0.014862061,-0.013267517,0.021713257,-0.0006275177,0.02017212,-0.02520752,0.057403564,0.0026493073,-0.015838623,0.025344849,0.019195557,0.03488159,0.053588867,-0.019561768,0.031707764,0.019058228,-0.05593872,0.011650085,0.031021118,-0.0069084167,-0.015975952,-0.044158936,-0.022109985,0.002916336,-0.004512787,-0.026916504,-0.0010271072,0.003610611,0.0287323,0.032592773,-0.019592285,-0.032073975,0.0042648315,-0.009262085,-0.039031982,-0.012107849,-0.032196045,0.012550354,0.052825928,-0.020355225,0.0050315857,0.007698059,0.007129669,-0.001830101,-0.0057792664,0.011558533,-0.0044288635,-0.037506104,0.020614624,0.008117676,0.027282715,0.0073013306,0.023895264,0.017120361,0.024978638,0.054870605,-0.000497818,-0.022201538,-0.059814453,0.014556885,-0.04876709,-0.0023708344,0.016647339,-0.0135269165,-0.010314941,-0.014183044,-0.0059547424,-0.028396606,0.0054473877,-0.010345459,-0.0019741058,0.019302368,-0.028518677,-0.027664185,-0.06378174,-0.016647339,-0.0028247833,0.08392334,0.030227661,-0.007457733,-0.07824707,-0.0023441315,0.0390625,-0.00059080124,0.0077552795,-0.013839722,-0.011383057,-0.0010662079,-0.03552246,-0.015899658,-0.0071640015,0.015853882,0.009300232,-0.0013608932,0.030685425,-0.00032043457,0.015808105,0.001709938,0.0052261353,0.021514893,-0.014541626,-0.0007529259,-0.009140015,0.03286743,0.004032135,-0.023468018,-0.050750732,0.03451538,0.0076026917,0.031585693,-0.0335083,-0.019073486,-0.0021858215,0.017440796,0.01448822,-0.018661499,-0.012634277,-0.005680084,-0.044036865,-0.068847656,0.05126953,-0.021194458,0.029907227,0.028274536,0.010284424,0.019226074,0.005504608,-0.00017142296,0.021636963,-0.026748657,-0.021240234,-0.035308838,-0.028579712,-0.011604309,-0.0016479492,-0.012641907,0.015068054,-0.017593384,0.0069274902,0.018341064,-0.028045654,0.024276733,-0.009140015,-0.00003939867,0.011985779,0.010437012,0.028427124,0.030380249,0.0043182373,-0.03387451,0.019851685,-0.007030487,-0.0029964447,-0.0124053955,0.04763794,0.022598267,-0.011123657,0.00038790703,-0.005340576,-0.016723633,-0.030670166,-0.007827759,0.0037956238,0.015533447,-0.0018320084,-0.03842163,0.027145386,0.008026123,-0.037017822,-0.030670166,0.02458191,0.005264282,-0.032470703,0.03253174,0.03451538,0.06225586,-0.00944519,0.0069274902,0.010299683,0.043304443,0.034576416,0.016204834,-0.024978638,0.021911621,-0.0027770996,0.02154541,0.007904053,-0.0030269623,0.005405426,0.012527466,0.022277832,0.026916504,0.0071868896,-0.020690918,-0.038208008,-0.00091457367,-0.005859375,-0.015319824,0.009254456,0.020401001,0.027832031,-0.022598267,0.01928711,0.009643555,-0.021453857,-0.027740479,-0.011444092,0.03640747,-0.012962341,-0.01260376,0.016983032,0.013648987,0.031951904,-0.055877686,0.0005373955,0.016845703,0.009765625,-0.022842407,-0.04534912,-0.035003662,0.004169464,0.030288696,0.0068626404,0.021636963,0.030059814,-0.0024604797,0.0014925003,0.030715942,0.00447464,-0.0038261414,-0.014251709,-0.04550171,-0.010765076,0.009880066,0.0070533752,-0.021606445,0.019195557,-0.0104522705,-0.009185791,0.0065841675,-0.02923584,-0.005191803,-0.023040771,0.016662598,0.030136108,-0.007835388,0.0057258606,-0.013267517,-0.033843994,0.0073165894,0.023590088,0.020904541,-0.047546387,0.028060913,-0.016052246,0.0018033981,0.005050659,0.013877869,0.026443481,0.03491211,0.008636475,0.02961731,-0.03488159,0.033355713,-0.03805542,0.014579773,0.008888245,-0.03717041,-0.004589081,-0.032348633,-0.01777649,0.050567627,-0.018737793,-0.018585205,-0.036254883,-0.030410767,-0.010063171,-0.043548584,0.014884949,0.030670166,0.034088135,-0.030151367,0.008758545,-0.01461792,0.004299164,-0.0065078735,0.004322052,-0.018112183,0.023605347,0.017364502,0.011421204,-0.03186035,-0.01737976,-0.024902344,-0.0049972534,-0.05267334,-0.04321289,-0.016235352,0.002565384,-0.018096924,-0.0052452087,-0.048950195,-0.015838623,0.014312744,-0.053344727,0.018722534,0.0022697449,0.016662598,-0.0007162094,-0.0118637085,-0.013130188,0.013038635,0.00072813034,0.04727173,0.0032920837,-0.0018033981,-0.052978516,0.00983429,0.022583008,0.037384033,-0.00844574,-0.012420654,-0.010925293,-0.028396606,-0.052581787,-0.008216858,-0.006362915,-0.014671326,-0.00466156,0.0006723404,-0.042755127,0.0005350113,-0.024673462,-0.005012512,0.015701294,0.0071487427,0.019821167,-0.004333496,0.012542725,-0.011253357,-0.01739502,-0.038726807,0.014671326,0.009719849,-0.005683899,0.013954163,0.060455322,0.0014343262,-0.009231567,0.0048294067,-0.014640808,0.016204834,-0.028656006,0.0046806335,-0.01285553,0.0015239716,-0.025787354,0.0035171509,-0.03918457,-0.002445221,0.092041016,-0.0006122589,-0.014442444,-0.01687622,-0.026367188,0.02394104,0.029129028,-0.0345459,-0.0022850037,-0.024902344,0.029769897,-0.033172607,0.010772705,0.0033111572,0.029464722,-0.0184021,-0.06311035,-0.015342712,-0.001964569,-0.012939453,-0.056488037,-0.01763916,-0.06695557,-0.008811951,-0.005622864,-0.0126953125,0.011734009,0.011871338,-0.00655365,-0.08642578,-0.009887695,0.041625977,0.00806427,0.027374268,-0.018249512,0.021697998,0.029052734,-0.031433105,-0.020401001,0.026412964,-0.030899048,-0.0019006729,-0.02758789,0.02394104,-0.012741089,-0.017745972,0.01600647,0.0020256042,0.019515991,-0.0036201477,0.0104522705,-0.019363403,0.00035190582,-0.010169983,0.02166748,-0.014839172,-0.017791748,0.02758789,-0.030944824,0.028396606,0.02470398,-0.00053071976,-0.002658844,0.036102295,0.03289795,-0.038726807,-0.0013799667,0.02104187,0.011741638,0.032318115,-0.018981934,0.03857422,0.021057129,-0.008430481,0.013534546,-0.012718201,-0.014884949,-0.037994385,-0.030899048,0.023101807,0.008628845,0.019607544,-0.016830444,0.0029773712,0.0067100525,0.0029449463,0.014862061,-0.007980347,-0.023666382,-0.03555298,0.00013184547,0.01260376,-0.0053138733,0.009628296,0.024963379,0.0126953125,0.036102295,0.009460449,-0.016647339,0.0073165894,0.02482605,-0.015090942,0.007873535,0.023895264,-0.0060806274,0.0074043274,0.017059326,0.011505127,-0.047546387,-0.01423645,-0.014427185,-0.0022277832,0.00076150894,0.0032138824,-0.022979736,-0.0052375793,-0.006126404,0.0038146973,-0.027175903,0.0134887695,-0.019500732,-0.032409668,-0.012702942,-0.013946533,0.02027893,0.008270264,0.011962891,0.021697998,-0.004737854,0.040252686,0.008857727,-0.01828003,0.039031982,0.038879395,0.011405945,-0.033111572,-0.010665894,-0.008895874,-0.0017633438,0.0026683807,-0.02758789,0.019515991,0.032104492,-0.01727295,-0.0014562607,0.004798889,0.021057129,-0.010215759,0.014198303,-0.011543274,0.017822266,-0.013702393,0.025863647,-0.048736572,0.015029907,0.015419006,0.007820129,-0.008361816,-0.0038166046,-0.033477783,0.025344849,0.0038433075,-0.024368286,0.048950195,-0.00073862076,0.032470703,-0.023208618,-0.012054443,0.007221222,-0.032470703,-0.021575928,0.019165039,-0.012435913,-0.0052871704,0.02809143,-0.032318115,0.03277588,-0.020645142,0.01889038,-0.0013961792,0.0019464493,-0.02027893,-0.014160156,-0.01158905,-0.019592285,-0.018554688,-0.012199402,-0.009117126,0.048706055,0.019424438,0.02835083,0.053894043,0.00894928,0.011734009,-0.031799316,-0.030075073,0.008651733,-0.011749268,0.013038635,-0.016677856,0.048614502,0.049621582,-0.015205383,0.03488159,0.023391724,0.0368042,0.005443573,0.008605957,-0.010421753,0.015777588,-0.016174316,0.017105103,0.006210327,0.0368042,-0.024398804,0.021514893,0.020523071,0.017166138,-0.03074646,0.038391113,0.06298828,0.020614624,-0.0098724365,0.043762207,-0.0036506653,-0.01121521,-0.015975952,-0.011566162,0.04824829,0.004524231,0.052734375,0.04522705,0.011566162,0.0052986145,0.032592773,-0.02633667,-0.021697998,0.068481445,0.025512695,-0.013397217,-0.010871887,-0.013130188,0.008598328,-0.05429077,-0.03640747,0.0075149536,-0.018859863,0.018295288,0.007621765,0.006996155,-0.0104522705,0.027832031,0.023361206,0.021377563,-0.010169983,0.03262329,0.037475586,0.0011758804,0.0184021,-0.007411957,0.018753052,-0.01612854,-0.016296387,0.02192688,0.028274536,-0.0015420914,-0.0029754639,0.02720642,0.0040512085,0.049682617,0.036743164,-0.026611328,0.005470276,0.032958984,0.011016846,0.002111435,0.044433594,0.036712646,0.01638794,0.03894043,0.03704834,0.034057617,-0.03161621,0.020584106,-0.008049011,-0.0018081665,-0.015960693,-0.006565094,0.0056495667,-0.018707275,0.024642944,0.0063819885,-0.020324707,0.017852783,0.017211914,-0.0003578663,-0.008522034,-0.017715454,0.01852417,-0.016586304,0.0012493134,0.023651123,-0.012992859,0.029190063,0.0060691833,0.01727295,-0.028121948,0.030563354,-0.00793457,-0.00831604,-0.007232666,0.02229309,-0.04309082,-0.0019369125,-0.009376526,0.008628845,-0.052825928,0.009338379,0.027740479,-0.013305664,0.026306152,0.00844574,-0.002981186,0.010543823,0.023284912,0.0027446747,-0.0055160522,-0.009552002,-0.03225708,0.035583496,0.04852295,0.016296387,0.0070991516,-0.012413025,-0.0065460205,0.00548172,-0.01234436,-0.002670288,-0.009521484,-0.024520874,-0.02166748,0.013702393,0.041168213,0.015419006,0.033569336,-0.0060272217,-0.019592285,0.008415222,0.036865234,-0.0006246567,-0.0065460205,-0.013381958,0.025299072,-0.01789856,0.05291748,0.043914795,0.0062713623,0.032714844,-0.009315491,-0.023742676,0.010177612,-0.01423645,0.026611328,-0.0015649796,0.001411438,-0.011360168,0.032958984,-0.012718201,-0.03567505,0.00699234,-0.017349243,-0.018356323,-0.02923584,0.0013179779,0.008049011,0.024032593,0.04586792,0.0026550293,-0.016860962,0.060424805,-0.019439697,0.04144287,-0.0049934387,-0.00028157234,0.05996704,0.02331543,0.043426514,0.012557983,0.012031555,-0.029052734,0.020446777,0.032989502,0.026794434,0.0131073,-0.0036258698,-0.015899658,0.037506104,0.0046081543,0.026153564,-0.0054779053,-0.0052490234,0.0093688965,-0.0023269653,-0.00774765,0.0034313202,-0.017318726,0.0033054352,0.04107666,-0.03314209,-0.006210327,-0.0234375,-0.011993408,0.030410767,-0.0014886856,-0.008293152,-0.005241394,-0.01776123,0.01826477,-0.031951904,-0.014923096,0.003616333,0.026794434,-0.047943115,-0.014274597,0.0031642914,0.007003784,-0.014541626,0.03186035,0.024108887,0.009941101,0.008964539,0.041992188,-0.011352539,0.041900635,-0.008598328,0.02796936,0.020462036,0.014823914,-0.018661499,0.0141067505,0.006801605,-0.02330017,0.0087509155,0.039794922,-0.014923096,0.004020691,-0.003479004,-0.014221191,0.016021729,0.007926941,-0.011894226,0.0026187897,-0.012321472,-0.014465332,0.01940918,0.0044670105,-0.0047416687,0.012451172,-0.010040283,-0.008728027,0.018203735,0.040649414,0.014221191,-0.029907227,0.00095272064,0.0064926147,0.0005054474,-0.010864258,-0.027069092,-0.003025055,-0.035491943,0.012641907,0.00894928,-0.0031909943,0.015899658,-0.018188477,-0.004688263,0.028701782,0.011878967,0.009178162,0.0043182373,0.005973816,0.029769897,-0.014274597,-0.0053863525,-0.010482788,-0.013954163,0.016815186,0.01008606,-0.005340576,-0.027511597,0.015808105,-0.003320694,0.0158844,0.0074501038,-0.0024547577,0.005458832,-0.015808105,-0.013221741,0.011138916,0.017730713,-0.0104522705,-0.015167236,-0.012008667,0.008514404,0.05267334,-0.0049324036,-0.0053634644,0.016296387,0.01637268,0.013702393,0.032958984,0.014694214,0.041625977,0.040527344,-0.017654419,-0.0066108704,0.016021729,-0.01436615,-0.03112793,0.017623901,-0.0059165955,-0.020980835,0.031555176,0.024673462,0.002199173,-0.034332275,-0.007686615,-0.0056991577,-0.0309906,0.010734558,-0.016036987,0.0026931763,-0.023284912,-0.016998291,0.0064735413,-0.015899658,-0.039794922,-0.022323608,-0.008293152,-0.0096588135,-0.039093018,0.011894226,-0.029907227,0.016906738,-0.017669678,-0.008369446,-0.0047416687,0.025360107,-0.017593384,-0.014671326,0.0022449493,0.03201294,0.018737793,0.013969421,0.023635864,-0.023132324,-0.040039062,-0.03704834,-0.00012767315,-0.014312744,0.024765015,-0.008018494,0.035949707,0.017715454,-0.021347046,-0.005886078,-0.009284973,-0.0032730103,-0.015930176,-0.009643555,-0.017593384,0.011817932,0.014801025,-0.0032176971,-0.0024108887,0.038024902,-0.03503418,-0.019241333,0.02760315,0.04232788,0.01146698,0.03656006,-0.022491455,-0.009277344,-0.017715454,0.00069379807,-0.0154953,0.0076293945,0.0041389465,0.00043702126,-0.0069084167,-0.00012946129,0.03164673,-0.0024356842,0.0042037964,0.024780273,-0.0027999878,-0.0073928833,0.036865234,0.0050468445,0.0021018982,-0.017150879,-0.014160156,0.024490356,0.024765015,0.020431519,-0.0053520203,-0.0152282715,0.007381439,-0.018203735,0.01499939,0.024032593,-0.012786865,-0.04345703,-0.03274536,-0.036224365,0.012397766,0.0073165894,0.010612488,-0.008399963,0.015106201,-0.018936157,-0.024780273,-0.016113281,0.036254883,0.01574707,-0.020843506,-0.0107040405,-0.00031089783,0.018417358,-0.030715942,0.010467529,-0.044403076,-0.042053223,-0.0077056885,-0.014503479,0.01083374,0.009681702,-0.004108429,-0.008598328,-0.009796143,-0.0039863586,0.0051498413,0.027450562,-0.01751709,-0.016571045,0.021026611,0.021850586,-0.022613525,0.018493652,-0.015808105,-0.0015001297,0.014175415,-0.025146484,0.014762878,-0.012374878,0.035888672,0.0018396378,-0.0009703636,0.026794434,-0.0075569153,0.015686035,-0.028167725,0.011955261,0.01399231,-0.002407074,0.036254883,-0.028808594,-0.017868042,0.00944519,-0.02961731,-0.03112793,0.015419006,0.016220093,0.0231781,-0.00037789345,0.046844482,-0.01398468,-0.024414062,0.028167725,0.009094238,-0.019363403,-0.014442444,0.0345459,-0.004711151,-0.001701355,-0.0055999756,-0.014709473,-0.03488159,-0.017547607,0.009735107,-0.010643005,-0.0039596558,0.02520752,0.017974854,0.04272461,-0.0013723373,0.027511597,0.012329102,0.008102417,0.02998352,0.000623703,0.04824829,-0.0062828064,-0.028213501,0.009895325,0.005012512,-0.02923584,0.000013947487,-0.010437012,0.007659912,-0.04333496,0.016921997,0.0022697449,0.039916992,-0.015602112,0.013008118,-0.02809143,-0.016418457,-0.02949524,-0.013908386,-0.032470703,0.00687027,0.02758789,0.0019989014,0.014656067,0.002374649,-0.03491211,0.015144348,0.048980713,-0.0021896362,-0.03152466,-0.018692017,0.010055542,0.002620697,0.009094238,-0.008865356,-0.0040664673,-0.027862549,0.0011768341,-0.006462097,0.0039711,-0.013931274,0.0068588257,0.0003247261,-0.0012664795,-0.006401062,0.03262329,0.0019626617,-0.009742737,0.0072021484,-0.0010375977,0.023590088,0.019744873,-0.012542725,0.027023315,0.022338867,-0.045715332,0.066101074,-0.006362915,0.02897644,-0.020889282,-0.0069351196,-0.033966064,-0.026748657,-0.015090942,-0.0035305023],"createdAt":"2026-04-18T19:25:48.953Z","updatedAt":"2026-04-24T11:32:47.754Z","lastSeenAt":"2026-04-24T11:32:47.754Z","tsv":"'/api/v1/transactions/294':94,171 '/request':15,32 '0.02':14,31,75,125 '000':113 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':128 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':118 '20':112 '300':133 '6':123 'Base network API' 'USDC micropayment API' 'accept':95 'access':7,24,42 'actual':173 'address':127 'advertis':187 'ai':64 'analyt':63 'api':6,23,41,84,141 'base':9,26,80,114,120 'beyond':180 'call':4,21 'categori':60 'challeng':103 'commit':89 'confirm':104 'connect':150 'content':156 'cost':74 'data':62 'decim':124 'descript':167 'doc':140 'document':135,194 'endpoint':36,53,93,172,184,189 'exampl':164 'expect':179 'extrem':137 'financ':67 'includ':61 'infrastructur':70 'input':177 'json':100 'json-response' 'key':85 'learn':66 'limit':87 'live':107 'lowpaymentfee' 'lowpaymentfee.com':38 'machin':65 'mani':52,188 'network':81 'offer':54 'one':50 'openapi':160 'page':145 'pay':2,19 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request' 'payment':46,110,130 'per':3,20 'platform':57,186 'post':96,183 'post-method' 'premium':5,22,40 'premium API' 'price':142 'prompt':152 'protocol':12,29,47 'provid':39,191 'rate':86 'readm':144 'render':147 'request':73,97 'request/response':163 'requir':90,108 'return':99,174 'schema':161 'second':134 'span':59 'spars':138 'specif':92 'technic':193 'timeout':131 'unit':115 'usdc':17,34,77,117 'usdc-base' 'util':71 'via':10,27,43 'wallet':151 'web3':68 'x402':11,28,45,102 'x402 endpoint' 'x402-payment'","prices":[{"id":"b156a3e4-f026-4e4c-b6ac-c2951be3a028","listingId":"343877fb-c247-4981-a480-33a7608de6ae","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/294","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:25:48.953Z"}],"sources":[{"listingId":"343877fb-c247-4981-a480-33a7608de6ae","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/294","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:48.953Z","lastSeenAt":"2026-04-24T11:32:47.754Z"}],"details":{"listingId":"343877fb-c247-4981-a480-33a7608de6ae","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/294\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid payment proof to access.","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","source_url":"https://lowpaymentfee.com/api/v1/transactions/294"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/294"}],"useCases":["Accessing premium transaction data with per-call USDC micropayments","Integrating pay-as-you-go API calls without API key management","Agent-driven API consumption with on-chain payment settlement"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer no subscription commitments"],"notFor":["Users needing detailed API documentation or schemas before integration","High-volume use cases where per-call pricing may add up without bulk discounts","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.738Z"},"updatedAt":"2026-04-24T11:32:47.754Z"}}