{"id":"14c612c0-5317-48d6-8e23-5133af8611fd","shortId":"SGFCY2","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 accepts POST requests and requires payment of 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equates to $0.02 per request. The payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.\n\nThe broader lowpaymentfee.com platform advertises multiple API categories including 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 (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access.\n\nHowever, the specific endpoint at /api/v1/payments/290 is labeled only as \"Premium API Access\" without further documentation on what data or functionality it returns. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no additional technical documentation. Without more detail on the response payload or intended use case, the exact functionality of this particular endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","post-method"],"categories":["payments","infrastructure"],"synonyms":["x402 API","pay-per-request API","USDC micropayment endpoint","Base network API","crypto-paid API","lowpaymentfee"],"warnings":["No documentation available — docs, pricing, and API pages only show 'Connect wallet'","The specific functionality of /api/v1/payments/290 is undocumented","No response schema or example output available","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/290","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/payments/290","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 402 challenge as expected for x402), but there is no documentation on what the endpoint actually returns, no OpenAPI schema, no example responses, and the docs pages are empty. The specific functionality of /api/v1/payments/290 is entirely unclear beyond the generic label 'Premium API Access'.","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":"2026-04-19T07:01:55.669Z","embedding":[-0.024551392,-0.04196167,0.04449463,0.02279663,0.010040283,-0.028839111,-0.029144287,0.047027588,0.08392334,-0.068725586,0.019073486,-0.035491943,-0.040863037,-0.04434204,-0.027511597,-0.007858276,-0.0077552795,0.007434845,-0.035217285,0.025970459,0.026260376,-0.011955261,-0.03338623,0.026931763,0.0099487305,-0.026123047,-0.014945984,-0.01739502,-0.0023384094,-0.040130615,0.038116455,-0.026672363,0.0034866333,0.014732361,-0.032684326,-0.025863647,0.002067566,0.033813477,0.029403687,-0.021011353,-0.012039185,-0.05682373,-0.0014944077,-0.014152527,-0.052520752,-0.0015830994,-0.0049705505,-0.018630981,-0.0053710938,0.0038223267,-0.045135498,-0.014587402,-0.007835388,0.0017976761,0.012672424,0.013343811,0.014533997,-0.010108948,0.00623703,0.019363403,-0.008522034,-0.06591797,-0.015625,-0.0058898926,0.0041656494,0.05404663,-0.009994507,0.04208374,0.0022258759,0.057891846,0.053588867,0.04522705,0.030944824,0.014701843,-0.0076446533,0.004386902,0.006576538,0.061279297,-0.024276733,-0.008308411,-0.009773254,0.0015640259,-0.045928955,0.0019721985,-0.014175415,-0.033081055,-0.015586853,0.008636475,-0.019714355,0.023284912,-0.07147217,0.0012235641,-0.010719299,0.012207031,0.015792847,-0.005886078,-0.0039520264,0.027404785,-0.011726379,0.02166748,0.008117676,-0.0395813,0.01890564,0.011993408,0.038635254,0.043914795,0.021774292,0.023712158,0.014091492,-0.007926941,-0.015853882,0.020126343,-0.015731812,-0.012321472,0.0057792664,0.015319824,-0.02168274,0.014755249,-0.023361206,0.017913818,-0.048431396,0.051605225,0.026412964,-0.00995636,0.016326904,-0.043395996,-0.01121521,0.013465881,-0.018157959,-0.012771606,0.025436401,0.0047798157,0.033111572,-0.025421143,-0.038909912,0.0121154785,-0.017929077,-0.019226074,-0.05203247,-0.041931152,0.050842285,-0.019760132,0.028915405,0.027954102,-0.097595215,-0.0055999756,-0.047058105,0.002046585,-0.04269409,-0.002412796,-0.0066337585,0.023910522,-0.012718201,-0.014038086,-0.02520752,-0.012329102,0.011047363,0.031097412,-0.032165527,0.052764893,-0.01159668,0.026290894,0.027130127,0.0143585205,0.025497437,0.029693604,-0.009025574,-0.077819824,-0.08843994,-0.014411926,-0.011520386,-0.01939392,-0.03366089,0.0060768127,-0.004020691,-0.06994629,-0.018051147,-0.016143799,0.002319336,-0.03353882,-0.00006514788,-0.028427124,0.010482788,-0.012741089,-0.07098389,-0.035614014,-0.02607727,0.08050537,0.025802612,0.011077881,0.03970337,-0.017959595,0.06384277,0.023757935,-0.019302368,-0.022766113,0.014335632,-0.015792847,0.014678955,-0.006576538,0.0012359619,-0.047027588,0.027816772,0.07055664,0.012809753,-0.009506226,-0.004837036,-0.059417725,-0.025146484,-0.03942871,0.0014810562,0.009933472,-0.0012245178,0.050201416,-0.040100098,-0.044311523,-0.021102905,0.015586853,0.017990112,0.055786133,0.018615723,-0.01184845,0.012260437,0.021896362,-0.047027588,0.020370483,0.030639648,0.011657715,-0.04095459,-0.021316528,0.023117065,0.042510986,-0.013938904,0.022918701,-0.009811401,0.024597168,-0.01776123,0.0040740967,0.030731201,-0.0017166138,-0.019470215,-0.03060913,-0.032409668,0.027130127,-0.0069084167,-0.027313232,-0.03164673,-0.07098389,0.04159546,0.030975342,0.056915283,-0.010223389,0.0090789795,-0.02142334,-0.006095886,-0.07183838,0.056915283,0.075805664,-0.011116028,0.00028705597,0.0059127808,-0.0067634583,-0.02444458,-0.006416321,0.0039024353,-0.038970947,-0.031799316,0.0010414124,-0.047180176,0.01701355,0.018569946,0.01828003,0.054718018,0.0040740967,-0.044769287,-0.020248413,-0.0044136047,-0.0057525635,-0.018676758,-0.0039787292,-0.022750854,-0.0008845329,0.023330688,0.0028705597,0.018814087,-0.011787415,-0.002916336,0.00014925003,-0.017715454,-0.028076172,-0.03086853,0.005130768,-0.016601562,-0.065979004,0.011886597,-0.0013837814,0.07470703,-0.03060913,0.025726318,-0.0054359436,-0.0009460449,0.057128906,-0.023117065,-0.049957275,0.0101623535,0.021774292,0.013336182,0.03616333,0.0055389404,-0.040252686,-0.014228821,0.060516357,-0.0018920898,-0.015640259,0.0017433167,0.027282715,0.026977539,-0.012969971,-0.059631348,-0.02267456,-0.01751709,-0.03640747,0.015823364,-0.034698486,0.032806396,-0.008644104,0.0022621155,-0.019577026,-0.020874023,-0.023986816,0.02645874,-0.025131226,0.004650116,-0.018218994,-0.016143799,0.0395813,0.020126343,-0.009048462,-0.00020313263,0.044891357,0.032836914,-0.005619049,-0.033050537,-0.0036468506,-0.004234314,0.012367249,0.020980835,0.021820068,0.025436401,0.056610107,-0.0435791,0.019683838,0.047668457,0.010253906,0.032409668,-0.010765076,0.012687683,-0.0670166,-0.058502197,-0.029312134,-0.039154053,0.023406982,0.007385254,-0.009254456,0.039245605,0.0022659302,-0.029220581,-0.04800415,0.021377563,-0.052520752,0.007858276,0.046905518,-0.0063667297,-0.008155823,-0.006275177,-0.002998352,0.010002136,0.048950195,0.0047340393,0.01789856,0.06677246,0.048309326,0.009338379,0.015991211,0.0129852295,0.03805542,-0.0012807846,-0.026519775,-0.027328491,-0.0039901733,0.018875122,-0.014373779,-0.02192688,-0.06512451,0.04135132,0.047668457,0.07342529,0.021072388,0.0013113022,0.019424438,-0.005027771,0.0067367554,-0.030014038,-0.012275696,-0.020385742,-0.041809082,0.033081055,-0.02305603,0.0019741058,0.0038261414,0.03479004,-0.016601562,0.01828003,-0.021972656,0.04977417,0.003080368,0.00067281723,0.014060974,0.011886597,0.027389526,0.06970215,-0.032714844,0.04248047,0.02671814,-0.03112793,0.012557983,0.04626465,-0.014945984,-0.024871826,-0.05758667,-0.019958496,-0.0032577515,-0.0021953583,-0.04776001,0.004081726,0.014656067,0.015136719,0.022964478,-0.027694702,-0.021209717,-0.013435364,-0.003534317,-0.06008911,-0.016616821,-0.026153564,0.00001835823,0.03616333,-0.011680603,-0.009536743,0.013900757,0.005378723,0.0063705444,0.008056641,0.027999878,-0.0042495728,-0.042541504,0.020935059,0.018341064,0.0209198,0.009735107,0.03878784,0.0061187744,0.025924683,0.06390381,0.010665894,-0.020431519,-0.052978516,0.02822876,-0.05758667,-0.00028705597,0.008239746,-0.018661499,-0.0073013306,-0.01020813,-0.019607544,-0.033721924,0.010169983,-0.040039062,0.010246277,0.021392822,-0.025680542,-0.031097412,-0.058624268,-0.029205322,0.008682251,0.06311035,0.021697998,0.0046043396,-0.06793213,-0.008377075,0.033966064,0.0044898987,0.02418518,-0.013977051,-0.023895264,-0.026489258,-0.04321289,-0.015960693,-0.0143966675,0.025039673,0.0066604614,-0.01411438,0.031341553,-0.005104065,0.018005371,0.008270264,0.015792847,0.02746582,-0.044403076,-0.004497528,-0.0045700073,0.050048828,-0.0035438538,-0.019454956,-0.04537964,0.047210693,0.018630981,0.02180481,-0.02897644,-0.0050201416,-0.0011339188,0.018920898,0.022338867,-0.009460449,-0.014808655,-0.0037593842,-0.045013428,-0.035949707,0.034729004,-0.021118164,0.027999878,0.02142334,0.007965088,0.0070495605,0.011329651,-0.0025672913,0.019470215,-0.026947021,-0.0054244995,-0.028747559,-0.026535034,-0.020462036,-0.00004029274,-0.015419006,0.016403198,-0.02130127,0.015098572,0.016983032,-0.022521973,0.025177002,0.0044517517,0.0007967949,0.017288208,-0.0023841858,0.021347046,0.041503906,0.005290985,-0.038146973,0.013694763,-0.0029563904,0.006000519,-0.0096206665,0.048309326,0.027008057,-0.011734009,-0.001294136,-0.007911682,-0.016296387,-0.0259552,-0.0068893433,-0.006801605,0.0209198,-0.010543823,-0.052886963,0.027236938,0.022476196,-0.023635864,-0.022613525,0.027542114,0.008087158,-0.030349731,0.037078857,0.033691406,0.057739258,-0.019226074,-0.002090454,0.013374329,0.0234375,0.030380249,0.011131287,-0.014450073,0.019577026,-0.01979065,0.016998291,0.0007238388,-0.005821228,0.009643555,0.0047340393,0.032684326,0.032440186,0.010345459,-0.020050049,-0.027999878,0.009056091,-0.0013027191,-0.014816284,0.021697998,0.025238037,0.02381897,-0.019302368,0.018341064,0.017333984,-0.016662598,-0.023071289,-0.0034809113,0.033294678,-0.029205322,-0.017929077,0.016586304,0.014205933,0.03942871,-0.058135986,0.008323669,0.00090932846,0.023910522,-0.030075073,-0.03643799,-0.04336548,0.017807007,0.02758789,0.020431519,0.025665283,0.028045654,0.0042152405,0.004688263,0.029052734,0.008560181,-0.009841919,-0.018569946,-0.050048828,-0.01802063,-0.00541687,-0.0027313232,-0.032806396,0.008972168,-0.0030784607,-0.026672363,0.0032215118,-0.0137786865,-0.007835388,-0.009567261,0.001996994,0.03286743,0.0026931763,0.013435364,-0.010414124,-0.02784729,0.012924194,0.004966736,0.020050049,-0.052368164,0.0093307495,-0.014678955,0.0025291443,0.0014839172,0.0028457642,0.02508545,0.035583496,0.006690979,0.034118652,-0.046081543,0.042816162,-0.046966553,0.02418518,0.0024814606,-0.04537964,-0.0071029663,-0.026382446,-0.012260437,0.04067993,-0.017166138,-0.014755249,-0.03125,-0.025878906,-0.015571594,-0.04748535,0.013221741,0.03677368,0.033477783,-0.037994385,0.010063171,-0.015403748,-0.0030765533,-0.017807007,-0.0033912659,-0.010528564,0.01374054,0.014816284,0.008384705,-0.029785156,-0.031951904,-0.026519775,-0.013450623,-0.0413208,-0.045288086,-0.013221741,0.00655365,-0.011993408,-0.013320923,-0.0357666,-0.01852417,-0.008506775,-0.048706055,0.012916565,0.009094238,0.024108887,0.00894928,-0.012939453,0.0050964355,0.02456665,-0.008308411,0.038482666,0.016448975,0.0035324097,-0.028915405,0.007045746,0.02192688,0.02519226,0.013153076,-0.0054244995,-0.013031006,-0.019470215,-0.05154419,-0.014091492,-0.006137848,-0.016693115,-0.008132935,0.0025291443,-0.035858154,0.0005393028,-0.012283325,0.010116577,0.022964478,0.013069153,0.02079773,-0.006454468,0.008346558,-0.011177063,-0.009819031,-0.03744507,0.029541016,0.009765625,-0.0038070679,0.022155762,0.040924072,0.01096344,-0.009613037,0.013435364,-0.0039405823,0.007659912,-0.01600647,0.015007019,-0.008720398,0.008323669,-0.015899658,-0.01939392,-0.03741455,-0.0028495789,0.08251953,-0.008377075,-0.016143799,-0.015434265,-0.0082473755,0.020599365,0.017333984,-0.04156494,-0.011665344,-0.022216797,0.0053634644,-0.008338928,0.026870728,0.0059127808,0.023712158,-0.016113281,-0.051086426,-0.013076782,0.011962891,-0.012268066,-0.06317139,-0.007987976,-0.0602417,0.0018396378,0.0025367737,-0.021194458,0.0028686523,0.015930176,-0.002708435,-0.084228516,0.0042304993,0.03161621,0.012626648,0.020812988,-0.011550903,0.025894165,0.020812988,-0.026565552,-0.02128601,0.043426514,-0.03125,-0.013023376,-0.030731201,0.017562866,-0.015808105,-0.023422241,0.022506714,0.010620117,0.02973938,-0.01689148,-0.0010595322,-0.012840271,0.0074043274,-0.016448975,0.02999878,-0.009101868,-0.016693115,0.033172607,-0.037475586,0.031204224,0.017410278,-0.0060768127,0.0024051666,0.024993896,0.04623413,-0.03488159,-0.0024223328,0.026306152,0.01890564,0.042541504,-0.023468018,0.034820557,0.019470215,-0.011108398,0.021697998,-0.003917694,-0.020568848,-0.046051025,-0.0052604675,0.020080566,-0.004638672,0.024246216,-0.030654907,0.0178833,0.014640808,-0.007949829,0.019897461,-0.0064888,-0.02003479,-0.025024414,0.003353119,-0.0022449493,0.0016155243,-0.010108948,0.022064209,0.012542725,0.042419434,0.016036987,-0.009742737,0.021377563,0.024093628,-0.013183594,0.012016296,0.02104187,-0.0031051636,0.011474609,0.02557373,0.010131836,-0.043304443,-0.011474609,-0.025466919,-0.0077934265,-0.00019049644,-0.0040893555,-0.016998291,-0.004142761,-0.0037078857,-0.0017118454,-0.03253174,0.0099487305,-0.018569946,-0.03390503,-0.01222229,-0.021316528,0.016311646,0.010314941,0.01033783,0.028900146,-0.0041542053,0.051757812,0.000998497,-0.01083374,0.019363403,0.034851074,0.014854431,-0.037261963,-0.010871887,-0.011917114,0.0068588257,-0.0013122559,-0.029586792,0.007724762,0.036956787,-0.014457703,0.0054016113,-0.00019097328,0.025863647,0.00012731552,0.014755249,-0.006088257,0.01977539,-0.01979065,0.03152466,-0.046722412,0.007701874,0.014167786,0.002626419,-0.00051546097,-0.009063721,-0.037322998,0.012390137,0.0037403107,-0.019500732,0.05380249,0.0033359528,0.022201538,-0.020904541,-0.014022827,0.017471313,-0.034606934,-0.010353088,0.036499023,-0.006629944,0.004470825,0.015548706,-0.0236969,0.028121948,-0.032714844,0.020874023,-0.0104522705,0.0025615692,-0.016937256,-0.025848389,-0.022033691,-0.0137786865,-0.02003479,0.0016698837,0.0074043274,0.048217773,0.009521484,0.030899048,0.04385376,0.0075187683,0.011398315,-0.034942627,-0.03729248,0.0048713684,-0.025299072,0.012451172,-0.015533447,0.05114746,0.04751587,-0.010513306,0.034942627,0.03302002,0.018722534,0.004852295,0.0034770966,-0.019943237,0.008178711,-0.010093689,0.025634766,0.0064926147,0.032592773,-0.022567749,0.019104004,0.00484848,0.030944824,-0.042877197,0.029464722,0.06933594,0.014770508,-0.007320404,0.027359009,0.00020670891,-0.022888184,-0.012931824,-0.01977539,0.052520752,0.012496948,0.05496216,0.047546387,0.014152527,-0.004711151,0.019042969,-0.028259277,-0.021408081,0.062042236,0.017547607,-0.022201538,-0.01701355,-0.018798828,0.0043792725,-0.048309326,-0.03640747,0.014457703,-0.013267517,0.0079574585,-0.0044555664,0.0011606216,-0.011123657,0.020553589,0.03463745,0.008888245,-0.018493652,0.026031494,0.039886475,0.011711121,0.019515991,-0.023284912,0.03451538,-0.019943237,-0.01878357,0.007499695,0.009918213,-0.009628296,-0.0064086914,0.022994995,-0.004940033,0.045410156,0.043792725,-0.02406311,0.01386261,0.03564453,0.012191772,-0.014129639,0.038391113,0.030258179,0.024642944,0.03741455,0.033081055,0.03137207,-0.03274536,0.026565552,-0.008033752,0.000065505505,-0.00957489,-0.006187439,0.0007081032,-0.0113220215,0.024276733,0.008140564,-0.022659302,0.027053833,0.033966064,-0.0020103455,-0.002784729,-0.017074585,0.0070877075,-0.019500732,0.007724762,0.020217896,-0.015365601,0.038116455,0.020462036,0.024017334,-0.035095215,0.022872925,-0.006511688,-0.020385742,-0.0059509277,0.024627686,-0.028640747,0.004180908,-0.008468628,0.005180359,-0.04916382,0.023712158,0.02935791,-0.020690918,0.03378296,0.0051193237,-0.0012483597,0.006954193,0.019348145,0.005832672,-0.0035934448,-0.011627197,-0.024551392,0.04586792,0.046051025,0.0063476562,0.021942139,-0.019439697,-0.020309448,-0.0038452148,-0.0037822723,-0.015342712,-0.012954712,-0.013145447,-0.03567505,0.009941101,0.03491211,0.020584106,0.03866577,-0.005130768,-0.019821167,0.009429932,0.023712158,0.011711121,-0.005203247,-0.0038909912,0.017471313,-0.00806427,0.047668457,0.0362854,0.005355835,0.033721924,-0.013679504,-0.0078048706,0.007247925,-0.0078125,0.020401001,-0.008682251,0.011505127,-0.013435364,0.023361206,-0.023483276,-0.04776001,0.015823364,-0.011978149,-0.0118255615,-0.025726318,-0.0059013367,0.0093688965,0.026947021,0.03729248,0.015975952,-0.022201538,0.0647583,-0.021255493,0.051727295,-0.0055618286,-0.0138168335,0.04876709,0.03326416,0.033050537,0.009788513,0.029144287,-0.0335083,0.02041626,0.05014038,0.017303467,0.012390137,-0.007095337,-0.013450623,0.039276123,-0.00060606,0.024978638,-0.02027893,0.0026512146,0.0178833,0.008758545,-0.0044059753,-0.0014953613,-0.0020961761,0.018173218,0.035125732,-0.03250122,-0.009765625,-0.023071289,-0.017654419,0.029815674,-0.009140015,0.007095337,0.00415802,-0.028915405,0.017532349,-0.033966064,-0.018112183,-0.007255554,0.01940918,-0.04055786,-0.018707275,0.0021572113,0.009223938,-0.019760132,0.029815674,0.02494812,0.008720398,0.011581421,0.047821045,-0.00945282,0.04510498,-0.008857727,0.013999939,0.031173706,-0.0024166107,-0.018966675,0.00617218,0.007801056,-0.021728516,0.013206482,0.051727295,-0.006286621,0.0052337646,-0.00036621094,-0.0151901245,0.010635376,0.003993988,-0.003692627,-0.0010175705,-0.0070877075,-0.018157959,-0.0076828003,0.0063209534,-0.013435364,0.00484848,-0.014793396,-0.018051147,0.005180359,0.03466797,0.018997192,-0.04083252,-0.006603241,0.006790161,0.01637268,-0.01852417,-0.02319336,-0.0178833,-0.032440186,0.017471313,0.00566864,0.0031585693,0.0209198,-0.023468018,0.0013122559,0.023834229,0.011100769,0.018127441,0.010101318,-0.008216858,0.008544922,-0.022857666,-0.0028896332,-0.016448975,-0.012626648,0.01977539,0.020309448,-0.004360199,-0.028717041,0.028671265,-0.012008667,0.022003174,0.008430481,-0.0134887695,0.017730713,-0.019317627,-0.0069503784,0.0084991455,0.013641357,-0.0077934265,-0.017700195,-0.014205933,0.017868042,0.051208496,-0.015136719,-0.013465881,0.023132324,0.00819397,0.022155762,0.035125732,0.019073486,0.03451538,0.026535034,-0.016830444,-0.016143799,0.016525269,-0.012245178,-0.021514893,0.018966675,-0.008422852,-0.025177002,0.018737793,0.0074920654,-0.0059165955,-0.013656616,-0.016647339,-0.008232117,-0.030731201,0.019989014,-0.02243042,0.02142334,-0.026443481,-0.012519836,-0.0064849854,-0.026947021,-0.04736328,-0.022964478,-0.0067253113,-0.00844574,-0.058929443,0.00957489,-0.035705566,0.013656616,-0.03048706,-0.01108551,-0.020370483,0.03010559,-0.018203735,-0.0028800964,0.002193451,0.027801514,0.019439697,0.020980835,0.017700195,-0.030426025,-0.041168213,-0.021194458,-0.0023288727,-0.014770508,0.027160645,-0.0021781921,0.032104492,0.010650635,-0.0135650635,-0.0013771057,-0.0090789795,-0.0050315857,-0.0015926361,-0.029388428,-0.017913818,0.015403748,0.016220093,-0.014701843,-0.012496948,0.042114258,-0.022628784,-0.01600647,0.030899048,0.052734375,0.007896423,0.03149414,-0.017562866,-0.0050849915,0.0043563843,0.002243042,-0.0102005005,0.019012451,0.0061149597,0.009536743,-0.006538391,0.00137043,0.027252197,-0.007461548,-0.010810852,0.023361206,-0.0049858093,-0.015686035,0.030334473,0.008148193,0.0020446777,-0.008705139,-0.01309967,0.023284912,0.03604126,0.02381897,-0.000995636,-0.0015535355,0.0036506653,-0.019836426,0.013618469,0.016616821,-0.019546509,-0.029846191,-0.016830444,-0.022232056,0.013130188,0.0032463074,0.022201538,-0.00048971176,0.02545166,-0.025497437,-0.027282715,-0.022842407,0.026763916,0.015266418,-0.012672424,-0.01096344,-0.0025081635,0.022735596,-0.025817871,0.0012617111,-0.042053223,-0.03326416,0.0071792603,-0.01940918,0.0143585205,0.0158844,0.0016784668,0.00029921532,-0.020217896,-0.0051612854,-0.0009741783,0.027252197,-0.019485474,-0.0031776428,0.024551392,0.0071144104,-0.021347046,0.02519226,-0.0062942505,-0.003643036,0.023345947,-0.016708374,0.0129776,-0.009803772,0.03640747,0.0041656494,-0.0046195984,0.037597656,-0.0014886856,0.0121536255,-0.040863037,0.0038013458,0.013008118,0.002506256,0.03286743,-0.031311035,-0.02154541,0.016662598,-0.026947021,-0.03955078,0.00014579296,0.016220093,0.04034424,-0.01979065,0.040374756,-0.008323669,-0.023040771,0.017166138,0.015899658,-0.011878967,-0.008766174,0.02633667,0.0060653687,-0.010482788,0.0052719116,-0.0135269165,-0.03466797,-0.015960693,0.01373291,-0.0017871857,-0.004501343,0.011100769,0.0104522705,0.045013428,0.0061683655,0.024047852,0.01725769,0.008361816,0.020309448,0.011756897,0.062438965,-0.0019226074,-0.020523071,0.0060920715,-0.0041923523,-0.012168884,-0.010726929,-0.009735107,0.0011835098,-0.039978027,0.020462036,-0.0010871887,0.035186768,-0.021987915,0.014129639,-0.024154663,-0.01763916,-0.033477783,-0.020828247,-0.016464233,0.010910034,0.031173706,-0.008117676,0.015434265,0.003435135,-0.024002075,0.019058228,0.04437256,-0.00982666,-0.02243042,-0.017333984,0.0061569214,-0.0017614365,0.003829956,0.010292053,-0.021560669,-0.020584106,0.0021781921,-0.021224976,0.010017395,0.0028800964,0.011795044,-0.0027427673,-0.008712769,-0.013694763,0.03353882,-0.005874634,-0.013008118,0.007949829,0.013397217,0.035614014,0.031921387,-0.008659363,0.02835083,0.029663086,-0.037872314,0.055541992,-0.0042648315,0.023269653,-0.008201599,0.0008068085,-0.038391113,-0.014457703,-0.0006890297,0.0070381165],"createdAt":"2026-04-18T18:50:16.843Z","updatedAt":"2026-04-24T00:32:11.454Z","lastSeenAt":"2026-04-24T00:32:11.454Z","tsv":"'/api/v1/payments/290':159 '/request':16,34 '0.02':15,33,75,141 '000':59 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':87 '20':58 '300':93 '6':66 'Base network API' 'USDC micropayment endpoint' 'accept':51 'access':7,25,44,153,166 'addit':195 'address':86 'advertis':99 'ai':111 'analysi':115 'analyt':105 'api':6,24,43,101,146,165,181 'base':9,27,60,70 'base-network' 'broader':96 'call':4,22 'case':208 'categori':102 'chain':84 'classif':118 'coin':65 'connect':190 'convers':134 'crypto-paid API' 'data':104,108,172 'decim':67 'detail':200 'doc':178 'document':169,197 'embed':119 'endpoint':38,137,157,215 'equat':73 'estim':129 'exact':210 'exchang':124 'export':109 'feed':123 'financ':120 'function':174,211 'gas':128 'generat':135 'geocod':132 'howev':154 'includ':103 'infrastructur':131 'insight':110 'instant':152 'intend':206 'key':147 'label':161 'learn':113 'limit':150 'list':139 'lowpaymentfee' 'lowpaymentfee.com':40,97 'machin':112 'maximum':90 'metric':106 'multipl':100 'network':10,28,71 'no-api-key' 'on-chain':82 'page':182 'particular':214 'pay':2,20 'pay-per-cal':1,19 'pay-per-call' 'pay-per-request API' 'payload':204 'payment':48,56,79 'per':3,21,76,142 'platform':98 'post':52 'post-method' 'premium':5,23,42,164 'price':122,179 'prompt':192 'protocol':13,31,49 'provid':41 'quot':127 'rate':125,149 'remain':216 'render':187 'report':107 'request':53,77,143 'requir':55 'respons':203 'return':176 'second':94 'sentiment':114 'settl':81 'site':185 'specif':156 'summar':117 'technic':196 'text':116 'timeout':91 'token':126 'unclear':217 'unit':61 'usd':64 'usdc':18,36,63 'usdc-settlement' 'use':207 'valid':133 'via':11,29,45 'wallet':191 'web3':121 'without':167,198 'x402':12,30,47 'x402 API' 'x402-payment'","prices":[{"id":"95541e42-9bea-4ed6-a7b0-f31f8cd05a80","listingId":"14c612c0-5317-48d6-8e23-5133af8611fd","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/payments/290","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:16.843Z"}],"sources":[{"listingId":"14c612c0-5317-48d6-8e23-5133af8611fd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/290","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:16.843Z","lastSeenAt":"2026-04-24T00:32:11.454Z"}],"details":{"listingId":"14c612c0-5317-48d6-8e23-5133af8611fd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/290 \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/payments/290"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/payments/290"}],"useCases":["Accessing premium API services without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-use endpoints into autonomous agent workflows"],"bestFor":["Developers wanting keyless, pay-per-call API access","Agents that can settle x402 payments on Base in USDC","Users who prefer no subscription commitments"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who prefer flat-rate pricing","Developers without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:07.522Z"},"updatedAt":"2026-04-24T00:32:11.454Z"}}