{"id":"1cd39439-db64-44e0-8619-1823cd43b67d","shortId":"MPYfSZ","kind":"x402","title":"Pay-per-call API key generation on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call API key generation on Base via x402 — $0.02 per request in USDC.","description":"lowpaymentfee.com is a platform offering a collection of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/apikeys/24` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made inline via the X-PAYMENT header — no API keys, accounts, or rate limits are required.\n\nThe broader platform advertises 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 listed at the same $0.02/request price point.\n\nHowever, the specific functionality behind the `/api/v1/apikeys/24` endpoint is unclear. The name \"Premium API Access\" and the path segment \"apikeys\" suggest it may generate or return an API key, but no documentation, request/response schema, or examples are available. The docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no substantive content. Without concrete schema or documentation, the actual behavior of this endpoint remains uncertain.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key-required","no-rate-limits"],"categories":["infrastructure","api-access"],"synonyms":["premium API access","x402 API key","pay-per-call API","USDC API payment","Base network API","micropayment API","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, and API pages all return only 'Connect wallet' with no content","No request or response schema provided; actual endpoint behavior is unknown","The endpoint path '/api/v1/apikeys/24' and title 'Premium API Access' are vague — unclear what data or service is returned","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/apikeys/24","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/apikeys/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the docs/pricing/API pages are empty beyond a wallet connect prompt. The actual functionality of this specific endpoint is ambiguous.","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":"2026-04-19T15:24:02.167Z","embedding":[0.0037956238,-0.040527344,0.03842163,0.021743774,0.015182495,-0.048706055,-0.013053894,0.04046631,0.07446289,-0.07543945,0.02128601,-0.046173096,-0.039215088,-0.034820557,-0.0284729,-0.0056381226,-0.031219482,-0.0019197464,-0.048034668,0.012184143,0.03265381,-0.028701782,-0.02229309,0.038146973,-0.004219055,-0.015258789,-0.010650635,-0.022521973,-0.00605011,-0.024887085,0.05053711,-0.02708435,-0.012496948,0.011001587,-0.027740479,-0.004131317,-0.00014984608,0.018035889,0.024536133,-0.0018262863,-0.010917664,-0.061645508,0.008399963,0.001748085,-0.03665161,0.007827759,-0.007335663,-0.029190063,0.0063171387,0.003004074,-0.03945923,-0.012870789,-0.010322571,0.00057935715,0.0042419434,0.01159668,-0.023712158,-0.028015137,0.0019626617,0.016052246,0.029953003,-0.05899048,-0.013092041,0.010948181,0.0051193237,0.058898926,-0.0096588135,0.048095703,0.011001587,0.05117798,0.029922485,0.056854248,0.024017334,0.01864624,-0.00705719,0.024124146,0.0007009506,0.058013916,-0.015304565,-0.012420654,-0.009880066,0.002483368,-0.031311035,0.008674622,-0.01626587,-0.045654297,-0.00957489,0.006916046,-0.0057029724,0.023986816,-0.083618164,-0.020065308,0.001083374,0.016448975,0.017333984,0.011306763,-0.009262085,0.026565552,-0.016326904,0.0149383545,-0.00061035156,-0.030715942,0.017181396,0.022628784,0.03149414,0.052124023,0.005016327,0.01864624,0.0048713684,-0.013298035,-0.044708252,-0.0015459061,-0.020568848,-0.01701355,0.0076789856,-0.0121536255,-0.020446777,0.003168106,-0.025009155,0.005718231,-0.049957275,0.0463562,0.028152466,-0.0031147003,0.00749588,-0.047973633,-0.014480591,0.016464233,-0.010887146,-0.023590088,0.014518738,0.018051147,0.017669678,-0.0047912598,-0.027130127,-0.0020523071,-0.015701294,-0.027160645,-0.04888916,-0.032989502,0.037597656,-0.0206604,0.027633667,0.028533936,-0.119018555,-0.016296387,-0.037841797,0.011672974,-0.034057617,-0.011062622,-0.011978149,0.013641357,-0.0071754456,-0.00554657,-0.0024871826,-0.018035889,0.009353638,0.028808594,-0.012649536,0.05532837,-0.021514893,0.05593872,0.018203735,0.022521973,0.013435364,0.018173218,0.00484848,-0.07342529,-0.07550049,-0.019058228,-0.021255493,-0.017196655,-0.02796936,0.030136108,-0.017944336,-0.061645508,-0.022537231,-0.00049352646,-0.012145996,-0.044281006,0.005672455,-0.016799927,-0.002603531,-0.007347107,-0.050445557,-0.008178711,-0.014312744,0.05029297,0.015419006,0.021499634,0.035614014,-0.031311035,0.053710938,0.01889038,-0.021835327,-0.032684326,0.010353088,-0.024749756,0.011795044,0.0029678345,-0.0028095245,-0.0513916,0.03262329,0.055725098,0.032592773,-0.01084137,-0.0107040405,-0.06732178,-0.03475952,-0.035095215,0.011390686,0.007461548,0.011398315,0.038970947,-0.037902832,-0.01625061,0.001455307,0.021194458,0.019104004,0.07727051,-0.0066108704,-0.024932861,0.007118225,0.03314209,-0.04006958,0.031951904,0.031433105,0.0057754517,-0.042053223,-0.006713867,0.01802063,0.050872803,-0.012863159,-0.0019989014,-0.026031494,0.015930176,-0.018920898,-0.0006136894,0.021942139,-0.012458801,-0.015182495,-0.037872314,-0.04550171,0.04272461,-0.018096924,-0.015144348,-0.031921387,-0.06149292,0.04916382,0.032562256,0.03253174,-0.01096344,0.022827148,-0.0015573502,-0.0047340393,-0.058685303,0.047973633,0.08111572,-0.0013170242,-0.0079956055,0.023147583,-0.015625,-0.029296875,0.0053634644,-0.006828308,-0.038513184,-0.021148682,0.022445679,-0.058776855,0.0058631897,0.021011353,0.037994385,0.047546387,-0.018249512,-0.024490356,-0.0259552,-0.01626587,-0.010856628,-0.03817749,-0.0037288666,-0.0020751953,-0.004486084,0.042663574,-0.013015747,0.025421143,-0.0053710938,0.007457733,0.003917694,-0.026901245,-0.02671814,-0.0146484375,0.028625488,0.010314941,-0.048217773,0.013298035,-0.006526947,0.061187744,-0.045776367,0.031021118,0.01109314,0.026031494,0.015670776,-0.010215759,-0.0519104,-0.0051841736,0.02015686,0.023452759,0.04800415,0.017181396,-0.01939392,0.0025081635,0.070251465,-0.019577026,-0.027328491,-0.0050735474,0.0104599,0.042510986,-0.030792236,-0.061279297,-0.02748108,-0.02319336,-0.048919678,0.015640259,-0.03970337,0.015075684,0.0007390976,-0.0016174316,-0.012260437,0.012298584,-0.026794434,0.036956787,-0.024902344,0.020050049,-0.020446777,-0.02670288,-0.009819031,0.029190063,-0.009178162,0.0005059242,0.024490356,0.013374329,0.00032687187,-0.031219482,-0.040740967,-0.008590698,0.0046958923,0.027786255,0.019119263,0.022903442,0.04611206,-0.03277588,0.016662598,0.029006958,0.014762878,0.036346436,-0.010375977,0.009597778,-0.071777344,-0.04736328,-0.026947021,-0.032043457,0.023529053,0.0050582886,-0.014671326,0.040405273,-0.0055618286,-0.014083862,-0.043060303,0.010368347,-0.025985718,-0.0087890625,0.0418396,-0.021774292,-0.036132812,0.005493164,-0.0016307831,0.001534462,0.046539307,0.014915466,0.03390503,0.06518555,0.050994873,-0.01247406,0.0018930435,0.022094727,0.017181396,-0.0015563965,-0.023864746,-0.032592773,0.013587952,0.011833191,-0.018432617,-0.023208618,-0.060424805,0.06903076,0.05355835,0.078063965,0.0059394836,0.004360199,0.045898438,-0.03036499,0.014656067,-0.009941101,-0.00957489,-0.016525269,-0.046295166,0.03137207,-0.02279663,0.019424438,-0.02508545,0.046539307,0.014839172,0.018066406,-0.044952393,0.055419922,-0.0034427643,-0.007610321,0.011528015,0.007774353,0.045318604,0.05419922,-0.049560547,0.007904053,0.025512695,-0.029312134,0.0042381287,0.03479004,0.001660347,-0.020462036,-0.062408447,-0.027511597,0.016647339,-0.011810303,-0.06524658,0.0000014901161,0.011146545,0.003435135,0.024276733,-0.028121948,-0.014732361,-0.0060920715,-0.02267456,-0.05831909,0.022415161,-0.057769775,0.0012693405,0.04107666,-0.03378296,-0.011833191,0.0013141632,-0.017440796,-0.00856781,0.027236938,0.020950317,-0.000002861023,-0.039276123,0.03289795,0.019241333,-0.012138367,0.01676941,0.021209717,0.010772705,0.034210205,0.049591064,0.0023097992,-0.016815186,-0.062927246,0.027633667,-0.055877686,0.00013613701,0.012451172,-0.04034424,-0.0033817291,-0.011550903,-0.026107788,-0.018661499,0.0077171326,-0.045806885,0.017333984,0.028579712,-0.022766113,-0.0070877075,-0.04940796,-0.014274597,-0.00970459,0.068725586,0.028076172,0.017028809,-0.05670166,-0.002620697,0.003900528,0.011009216,0.028076172,-0.013145447,-0.0026607513,-0.0073661804,-0.013923645,-0.0077171326,-0.015823364,0.029418945,-0.008285522,-0.011726379,0.026901245,0.028244019,0.0025596619,0.029342651,0.016708374,0.024246216,-0.031341553,-0.00484848,-0.008056641,0.028884888,0.0014629364,-0.01134491,-0.03729248,0.037384033,0.0055885315,0.032318115,-0.038238525,-0.011260986,-0.017623901,0.010154724,0.0023212433,0.0035152435,-0.009803772,-0.01146698,-0.07055664,-0.052490234,0.030075073,-0.03225708,0.038726807,0.016662598,0.0020427704,0.018707275,-0.003162384,-0.013122559,0.040374756,-0.012908936,-0.0014219284,-0.014175415,-0.037109375,-0.0105896,0.011665344,-0.02015686,0.014343262,-0.025466919,0.017471313,-0.0031166077,-0.017166138,0.024124146,0.0044288635,-0.0013513565,0.013450623,0.0011167526,0.018707275,0.036956787,0.004173279,-0.032073975,0.030517578,0.010787964,0.006324768,0.008506775,0.034057617,0.03137207,-0.018661499,0.009925842,-0.005886078,-0.006000519,-0.012672424,-0.015037537,0.00079488754,0.01965332,-0.00055933,-0.05319214,0.013313293,0.019989014,-0.03189087,-0.018463135,0.021636963,0.012069702,-0.03274536,0.017852783,0.025558472,0.054016113,-0.021636963,0.0028209686,0.011917114,0.016723633,0.0051345825,0.0069084167,-0.0036621094,0.015640259,-0.023498535,0.0072021484,-0.0039787292,0.009315491,0.025924683,-0.005622864,0.016311646,0.024917603,0.0070228577,-0.0063095093,-0.053497314,-0.010154724,-0.01651001,-0.013298035,-0.003107071,0.038909912,0.018630981,-0.026473999,0.015167236,0.01398468,-0.020996094,-0.020462036,0.00033807755,0.04107666,-0.012306213,-0.020385742,0.0068588257,0.007381439,0.030410767,-0.044281006,0.00075149536,0.0055389404,0.013893127,-0.019851685,-0.040252686,-0.044647217,0.008132935,0.05218506,0.014175415,0.020904541,0.024765015,0.010498047,-0.0045700073,0.037139893,0.004585266,-0.01436615,-0.0151901245,-0.0259552,-0.01134491,-0.0045433044,-0.0053596497,-0.025405884,0.007926941,-0.0040283203,-0.03967285,0.019226074,0.00415802,-0.0071907043,-0.00044059753,0.0072402954,0.03778076,0.0050582886,0.02911377,-0.0096206665,-0.028503418,0.0074424744,0.0020980835,0.004432678,-0.04748535,0.022918701,-0.0206604,-0.026260376,0.009208679,0.0062942505,0.008705139,0.032043457,0.0007405281,0.03378296,-0.060455322,0.056152344,-0.062347412,0.017623901,-0.0058174133,-0.02432251,-0.010353088,-0.027923584,-0.020339966,0.036743164,-0.023788452,-0.0076904297,-0.036102295,-0.015609741,-0.0003554821,-0.047790527,0.03161621,0.037261963,0.037994385,-0.024475098,0.001250267,-0.011627197,0.0028076172,-0.01739502,0.003271103,-0.003129959,0.016418457,0.01902771,-0.0079574585,-0.01902771,-0.028015137,-0.011276245,-0.0035057068,-0.0317688,-0.05001831,-0.0040779114,0.018127441,-0.00248909,-0.010848999,-0.031311035,-0.017974854,0.0027694702,-0.040130615,0.010864258,0.0045814514,0.003686905,-0.0074882507,-0.012359619,0.019622803,0.037322998,-0.028198242,0.04812622,0.00642395,-0.007499695,-0.026489258,0.016189575,0.035125732,0.01007843,-0.000446558,0.008422852,-0.021392822,-0.018707275,-0.047058105,-0.00843811,0.00044941902,-0.017288208,-0.002861023,0.003030777,-0.05090332,-0.01524353,-0.013092041,0.0021686554,0.028930664,0.04144287,0.014274597,0.0034809113,0.01979065,-0.0017175674,-0.0052833557,-0.028625488,0.032226562,0.010040283,0.0019817352,0.03060913,0.040008545,0.030258179,-0.005706787,0.011817932,0.0066604614,0.032714844,-0.012863159,0.002954483,-0.025772095,0.0050239563,0.003692627,-0.028457642,-0.022415161,-0.007827759,0.08062744,0.005821228,-0.025436401,0.0024986267,-0.007865906,0.016998291,0.016418457,-0.059661865,0.0069351196,-0.02381897,0.0026302338,-0.017349243,0.021636963,0.0040283203,-0.009590149,-0.0109939575,-0.054107666,-0.024307251,0.0019369125,-0.0075912476,-0.07269287,-0.021591187,-0.039276123,-0.0019226074,-0.0018863678,-0.015731812,-0.006298065,0.007537842,-0.014343262,-0.07244873,0.008155823,0.041046143,0.007888794,0.019927979,-0.016113281,-0.0048599243,0.018707275,-0.04437256,-0.012008667,0.032043457,-0.023208618,-0.016082764,-0.012496948,0.02746582,-0.031951904,-0.024627686,0.0116119385,0.008468628,0.038085938,-0.012145996,0.0035762787,-0.0038070679,0.015090942,-0.025665283,0.0040779114,-0.004787445,0.0034046173,0.03189087,-0.044769287,0.01789856,0.015586853,0.00667572,0.010604858,0.015182495,0.040924072,-0.03793335,-0.016479492,0.024169922,0.0025959015,0.03564453,-0.029342651,0.05038452,0.025878906,-0.035369873,0.034362793,0.006164551,-0.008094788,-0.05355835,-0.020065308,0.019729614,-0.0053749084,0.020431519,-0.031173706,0.005306244,0.03640747,-0.016983032,0.020904541,-0.028686523,-0.027435303,-0.021224976,-0.0069465637,0.0044441223,-0.0026397705,-0.0029335022,0.016540527,0.022216797,0.03567505,0.014137268,-0.004875183,0.009307861,0.011177063,-0.0056266785,0.011253357,0.022659302,0.010093689,0.01474762,0.034240723,0.0069084167,-0.03955078,-0.009208679,-0.041931152,-0.01802063,-0.0061454773,-0.0074310303,-0.017608643,-0.017715454,0.009025574,0.0040779114,-0.024932861,0.015571594,-0.04421997,-0.028167725,-0.003458023,-0.015090942,0.018341064,-0.0034160614,0.02017212,0.01927185,-0.0013456345,0.045715332,0.015182495,-0.0059928894,0.027313232,0.039520264,0.020080566,-0.025939941,-0.019058228,-0.020965576,0.013908386,0.006526947,-0.037902832,0.012176514,0.0418396,-0.026062012,0.0129470825,0.013946533,0.014076233,-0.024810791,0.0031776428,-0.0021190643,0.015472412,-0.019134521,0.032165527,-0.029159546,0.02670288,0.0031585693,-0.0037498474,0.005592346,-0.018722534,-0.03427124,-0.004047394,0.007545471,-0.03173828,0.046661377,-0.0016412735,0.021011353,-0.01953125,-0.011268616,0.01524353,-0.04663086,-0.020645142,0.038360596,-0.008476257,-0.00894165,0.006801605,-0.0206604,0.04550171,-0.02659607,0.00881958,0.0025501251,-0.0053253174,-0.010658264,-0.0057754517,-0.023101807,0.004348755,-0.003068924,0.0022125244,0.00598526,0.055633545,0.033447266,0.029830933,0.05078125,0.008903503,-0.00894928,-0.033447266,-0.018585205,-0.00037050247,-0.010070801,0.023529053,-0.0025806427,0.047790527,0.033111572,0.0062446594,0.036224365,0.030181885,0.023773193,-0.005039215,0.0055732727,-0.011657715,0.020889282,0.008628845,0.040924072,-0.0063095093,0.026672363,-0.038024902,0.024307251,0.0095825195,0.025909424,-0.043273926,0.03237915,0.068847656,0.013122559,-0.013923645,0.03326416,0.007659912,-0.0048561096,-0.026489258,-0.02128601,0.05569458,0.022872925,0.05517578,0.051605225,0.012519836,0.005706787,0.01436615,-0.020690918,-0.008628845,0.07751465,0.02784729,-0.026672363,-0.0112838745,-0.00073480606,0.012710571,-0.045959473,-0.037078857,0.0073432922,-0.01499176,-0.00434494,-0.016571045,-0.009269714,-0.021102905,0.019866943,0.009376526,0.013511658,-0.016525269,0.035949707,0.024124146,-0.002500534,0.02015686,-0.007698059,0.02809143,-0.026550293,-0.027770996,0.013626099,0.03161621,-0.0022335052,-0.016738892,0.010658264,0.009681702,0.0501709,0.044525146,-0.014083862,0.018753052,0.023712158,0.0071372986,0.000089108944,0.058624268,0.033294678,0.014350891,0.031097412,0.029388428,0.0340271,-0.043884277,0.013580322,0.016571045,-0.002948761,-0.014289856,-0.013336182,-0.009986877,-0.020614624,0.0050582886,-0.0017223358,-0.017868042,0.029678345,0.0317688,0.0051460266,0.0053863525,-0.002998352,-0.00012278557,-0.010261536,0.005630493,0.009529114,-0.010437012,0.034576416,0.02331543,0.030532837,-0.027664185,0.019851685,-0.0016927719,-0.018508911,-0.011260986,0.018554688,-0.036315918,0.0029773712,-0.0022239685,0.0024433136,-0.037078857,0.016677856,0.026107788,0.0012454987,0.031585693,0.017486572,-0.0043525696,-0.0135650635,0.008720398,0.007335663,0.00013625622,-0.01625061,-0.028320312,0.016738892,0.031829834,-0.0028190613,0.020309448,-0.018218994,0.0019311905,0.01084137,-0.015113831,0.0012331009,-0.00831604,-0.013847351,-0.017196655,-0.00036644936,0.039245605,0.020935059,0.046325684,-0.006210327,-0.017166138,0.022964478,0.027542114,0.008300781,0.020339966,-0.0010156631,0.015655518,0.0064964294,0.039245605,0.029006958,0.023025513,0.028701782,-0.014122009,-0.015258789,0.0016508102,-0.007209778,0.014961243,-0.0068130493,0.013259888,-0.011245728,0.033813477,-0.017700195,-0.032806396,0.006210327,-0.016677856,-0.023071289,-0.015220642,0.010116577,0.010353088,0.030914307,0.049926758,0.029678345,-0.0209198,0.055847168,-0.008995056,0.05404663,-0.016235352,-0.013664246,0.03363037,0.031921387,0.018249512,0.0058898926,0.016540527,-0.0287323,0.013168335,0.06640625,0.033111572,0.00093507767,0.008049011,-0.018722534,0.018615723,0.0046806335,0.02079773,-0.0061454773,-0.0024681091,0.009880066,-0.0072517395,-0.021530151,0.00006330013,-0.0079422,0.005004883,0.035003662,-0.049041748,-0.0152282715,-0.02381897,-0.021316528,0.016464233,-0.016693115,0.01398468,0.0015535355,-0.030715942,0.014427185,-0.02796936,-0.017868042,-0.01626587,0.027770996,-0.03515625,-0.02230835,-0.018295288,0.022567749,-0.011917114,0.011016846,0.021591187,-0.012710571,-0.0006608963,0.03756714,-0.009643555,0.037963867,-0.022827148,0.015068054,0.049224854,0.0036621094,-0.011024475,-0.0014982224,0.009178162,-0.0178833,0.0061683655,0.040924072,-0.0149383545,0.016677856,0.0059890747,-0.012397766,0.0074882507,0.0033435822,0.0036773682,0.0058784485,0.0022716522,0.004962921,-0.020401001,0.014190674,-0.005191803,-0.010597229,-0.017105103,-0.022644043,0.0049858093,0.01184845,0.010192871,-0.030944824,-0.01864624,0.020584106,0.030029297,-0.011528015,-0.010406494,-0.010360718,-0.043884277,0.01789856,0.02168274,0.014175415,0.007030487,-0.018096924,-0.003534317,0.015029907,0.015808105,0.005218506,0.003868103,-0.018173218,-0.004573822,-0.015357971,-0.027862549,-0.00843811,-0.014572144,0.010040283,0.044525146,0.0025672913,-0.027893066,0.009338379,-0.010574341,0.023544312,0.007534027,-0.017791748,0.012527466,-0.017807007,-0.017654419,0.0025806427,0.015449524,-0.031982422,-0.009841919,-0.016189575,0.029388428,0.041534424,-0.016586304,-0.0146484375,0.01524353,0.0010652542,0.02571106,0.02381897,0.0061454773,0.04446411,0.020462036,-0.015357971,-0.009643555,0.02204895,-0.0077552795,-0.016494751,0.005596161,-0.0073928833,-0.03552246,0.02330017,0.01878357,-0.009719849,-0.026947021,-0.013626099,-0.0034809113,-0.0037059784,0.022262573,-0.009391785,0.010643005,-0.022079468,0.0038051605,-0.01461792,-0.005455017,-0.045959473,-0.027313232,0.01373291,0.00073480606,-0.05923462,-0.0015029907,-0.040771484,0.0046844482,-0.026290894,-0.015205383,-0.00037646294,0.02229309,-0.014976501,0.014122009,0.0023002625,0.017120361,0.018463135,0.011497498,0.041015625,-0.015914917,-0.024261475,-0.028152466,0.011260986,-0.013374329,0.02545166,0.0151901245,0.04257202,0.029571533,0.0022220612,-0.0018167496,-0.010498047,-0.013244629,-0.016647339,-0.021530151,-0.019042969,0.02633667,0.005897522,-0.015533447,-0.017486572,0.042907715,-0.025253296,-0.007457733,0.022277832,0.06188965,-0.0056037903,0.03302002,-0.017120361,-0.019317627,-0.002128601,-0.005458832,-0.022521973,0.017456055,0.020721436,0.014190674,0.00022768974,-0.0030326843,0.010047913,-0.031097412,-0.00036859512,0.02166748,-0.00217247,-0.0126953125,0.01739502,0.014801025,0.0127334595,-0.019744873,-0.011138916,0.013145447,0.03302002,0.017349243,0.009811401,0.009422302,0.0059928894,-0.01914978,0.016647339,0.001917839,-0.021636963,-0.03253174,-0.028762817,-0.0368042,0.009216309,0.017944336,0.015319824,0.0055351257,0.021331787,-0.009002686,-0.038482666,-0.019851685,0.021530151,0.010238647,-0.010986328,-0.018859863,0.014419556,0.010696411,-0.027435303,0.003063202,-0.03387451,-0.027175903,0.013221741,-0.031921387,0.0068092346,0.010269165,-0.008087158,0.012634277,-0.01474762,0.011619568,-0.0032196045,0.026550293,-0.008117676,0.005306244,0.0051612854,0.015731812,-0.004173279,0.01675415,-0.0041236877,0.0052337646,0.032684326,-0.009124756,0.0046463013,-0.01725769,0.02394104,-0.011749268,0.000012636185,0.038909912,0.0017290115,-0.004673004,-0.035858154,-0.0066375732,-0.0034618378,-0.0069465637,0.03137207,-0.030303955,-0.030792236,0.0154953,-0.017166138,-0.027770996,-0.0039138794,0.029769897,0.037384033,-0.019180298,0.047607422,-0.009712219,0.0047950745,0.022979736,0.0006623268,-0.021438599,-0.00642395,0.047607422,0.00091362,-0.0044059753,0.006565094,-0.0043144226,-0.030593872,-0.017593384,0.02355957,-0.0032367706,-0.0023860931,0.016342163,0.007896423,0.03262329,-0.010429382,0.010772705,0.005630493,0.008934021,0.02041626,-0.0030403137,0.061279297,-0.012397766,-0.028549194,0.0028572083,0.01953125,-0.028381348,0.0003964901,0.00010704994,0.0015592575,-0.03829956,0.018707275,-0.008377075,0.03390503,-0.034606934,0.018920898,-0.028686523,-0.020950317,-0.031051636,-0.007385254,-0.027252197,-0.0005865097,0.03842163,0.008087158,0.018829346,0.002735138,-0.017318726,0.032165527,0.045959473,-0.0060577393,-0.01802063,-0.005935669,0.0035495758,-0.009780884,0.0126953125,0.027435303,-0.026443481,-0.012672424,0.018859863,-0.018844604,0.017471313,0.012779236,0.0066375732,-0.004108429,0.00012373924,-0.004180908,0.02885437,0.00068092346,-0.007118225,0.0050582886,0.0065841675,0.05807495,0.013771057,-0.004852295,0.015960693,0.010231018,-0.01864624,0.06173706,-0.01537323,0.022354126,-0.026565552,0.0015115738,-0.04232788,-0.01991272,-0.008972168,0.0035095215],"createdAt":"2026-04-18T19:29:29.007Z","updatedAt":"2026-04-23T08:02:07.679Z","lastSeenAt":"2026-04-23T08:02:07.679Z","tsv":"'/api/v1/apikeys/24':62,160 '/request':151 '0.02':12,28,71,150 '000':75 '20':74 '6':81 'Base network API' 'USDC API payment' 'access':68,168 'account':96 'across':107 'actual':215 'advertis':105 'ai':117 'analysi':121 'analyt':111 'api':5,21,45,67,94,167,181,196 'apikey':173 'avail':191 'base':9,25,54,76 'base-network' 'behavior':216 'behind':158 'broader':103 'call':4,20,73 'categori':109 'classif':124 'collect':39 'concret':210 'connect':202 'content':208 'convers':141 'cost':70 'data':110,114 'decim':82 'doc':193 'document':185,213 'embed':125 'endpoint':46,60,106,144,161,219 'estim':135 'exampl':189 'exchang':130 'export':115 'feed':129 'financ':126 'four':108 'function':157 'gas':134 'generat':7,23,142,177 'geocod':139 'header':92 'howev':154 'infrastructur':137 'inlin':86 'insight':116 'key':6,22,95,182 'learn':119 'limit':99 'list':64,146 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':118 'made':85 'may':176 'metric':112 'micropayment API' 'name':165 'network':55 'no-api-key-required' 'no-rate-limits' 'offer':37 'page':197 'path':171 'pay':2,18,42 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':41 'payment':83,91 'per':3,13,19,29,43,72 'platform':36,104 'point':153 'premium':66,166 'premium API access' 'price':128,152,194 'prompt':204 'protocol':51 'quot':133 'rate':98,131 'remain':220 'report':113 'request':14,30,44 'request/response':186 'requir':101 'return':179,199 'schema':187,211 'segment':172 'sentiment':120 'settl':47 'specif':59,156 'substant':207 'suggest':174 'summar':123 'text':122 'token':132 'uncertain':221 'unclear':163 'unit':77 'usdc':16,32,57,79 'usdc-settlement' 'use':56 'util':138 'valid':140 'via':10,26,48,87 'wallet':203 'web3':127 'without':209 'x':90 'x-payment':89 'x402':11,27,50 'x402 API key' 'x402-payment'","prices":[{"id":"e248e75c-9837-4ce7-8a4e-4d36b4d9625a","listingId":"1cd39439-db64-44e0-8619-1823cd43b67d","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/apikeys/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:29.007Z"}],"sources":[{"listingId":"1cd39439-db64-44e0-8619-1823cd43b67d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/apikeys/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:29.007Z","lastSeenAt":"2026-04-23T08:02:07.679Z"}],"details":{"listingId":"1cd39439-db64-44e0-8619-1823cd43b67d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/apikeys/24 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/apikeys/24"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/apikeys/24"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Purchasing API access or keys on-demand without creating an account","Programmatic pay-per-call access to platform services via x402","Agent-driven API consumption with inline USDC micropayments"],"bestFor":["Developers wanting zero-signup API access with crypto micropayments","AI agents that need to autonomously purchase API access","Users on the Base network looking for low-fee per-request APIs"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Anyone requiring fiat-only payment methods","High-volume consumers who need bulk pricing or subscription plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.207Z"},"updatedAt":"2026-04-23T08:02:07.679Z"}}