{"id":"31e815d1-7e70-4823-80b1-8fedf517236d","shortId":"GYvkLa","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at `/api/endpoint-40` is part of the lowpaymentfee.com platform, which hosts a collection of x402 protocol-gated APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The endpoint is labeled \"Premium API Access\" and accepts POST requests, returning application/json responses. Payment is handled via the x402 exact scheme on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\n\nThe specific functionality behind `/api/endpoint-40` is not documented — the provider's site lists various endpoints under `/api/v1/` and `/api/v2/` paths (analytics, AI, finance, utilities), but `/api/endpoint-40` does not appear among them. The maximum payment required per request is 20,000 units of USDC (likely 0.02 USDC given 6 decimals), consistent with the site's advertised $0.02/request pricing. The platform advertises no API keys, no rate limits, and instant access.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does. Without knowing the endpoint's purpose, callers must experiment or contact the provider for details.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-request","json-response","post-method"],"categories":["api","misc"],"synonyms":["premium api","x402 api","pay-per-call api","usdc gated endpoint","lowpaymentfee","micropayment api","base network api"],"warnings":["Endpoint /api/endpoint-40 is not listed among the provider's documented APIs — its actual functionality is unknown.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content.","No request or response schema available; callers cannot know what to send or expect back.","The specific purpose of this endpoint cannot be verified from available sources."],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-40","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/endpoint-40","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/endpoint-40 actually does. No OpenAPI schema, no request/response examples, and the docs pages are empty. The endpoint path doesn't match any listed API on the provider's site, making this 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":"2026-04-18T19:34:25.567Z","embedding":[-0.027374268,-0.022476196,0.049346924,0.021957397,0.015022278,-0.021896362,-0.028213501,0.041168213,0.06378174,-0.06951904,0.030914307,-0.056365967,-0.034942627,-0.044830322,-0.023345947,0.0011901855,-0.017044067,0.0019989014,-0.04333496,0.043884277,0.025054932,-0.023880005,-0.030654907,0.036224365,-0.003189087,-0.006000519,0.001124382,-0.015602112,-0.004547119,-0.02331543,0.021865845,-0.029464722,0.010513306,0.013473511,-0.024734497,-0.011375427,0.008163452,0.043762207,0.039855957,-0.0042800903,-0.0056762695,-0.056518555,-0.020309448,-0.009147644,-0.042266846,-0.008575439,0.0079956055,-0.026351929,-0.008483887,0.020645142,-0.020004272,-0.008079529,-0.022659302,0.01890564,0.015716553,0.00982666,0.00004863739,-0.0309906,0.0066070557,0.010246277,-0.009361267,-0.076660156,-0.0005903244,0.008216858,0.010566711,0.04031372,-0.014671326,0.053131104,0.009590149,0.062072754,0.046539307,0.046569824,0.03414917,0.0231781,0.011001587,-0.010749817,-0.004863739,0.043121338,-0.022537231,-0.0064086914,-0.0126953125,0.001868248,-0.042144775,-0.015037537,-0.027999878,-0.055480957,-0.012969971,0.010803223,-0.026733398,0.029571533,-0.075683594,-0.009414673,-0.014259338,0.017791748,-0.010261536,-0.01687622,-0.013725281,0.024993896,-0.015312195,0.020309448,0.007385254,-0.04663086,0.02079773,0.009086609,0.05279541,0.028869629,0.0016202927,0.025939941,0.0141067505,-0.03161621,-0.020706177,0.000872612,-0.028182983,0.0010023117,0.010879517,0.007484436,-0.020858765,0.00868988,-0.017456055,0.0309906,-0.05557251,0.038360596,0.02079773,-0.022964478,0.008575439,-0.037963867,-0.00066518784,-0.0024738312,-0.023071289,-0.0067253113,0.039215088,0.0012817383,0.010406494,-0.037902832,-0.022232056,0.008705139,-0.02355957,-0.002199173,-0.052734375,-0.023910522,0.029708862,-0.02619934,0.031204224,0.025512695,-0.089660645,-0.0038108826,-0.047790527,0.02420044,-0.043914795,0.005203247,-0.0022525787,0.01826477,-0.011810303,-0.017410278,-0.024612427,-0.005886078,-0.0043182373,0.04196167,-0.00806427,0.04675293,-0.00073957443,0.027008057,0.024139404,0.0014715195,0.0030326843,0.057769775,0.0046653748,-0.06964111,-0.08465576,-0.03225708,0.0047340393,-0.016952515,-0.041290283,0.0115356445,-0.00014710426,-0.057769775,-0.01689148,-0.01574707,0.013671875,-0.02432251,-0.0048980713,-0.031173706,-0.00491333,-0.0042877197,-0.06970215,-0.03967285,-0.029571533,0.06628418,0.01979065,-0.0057144165,0.02281189,-0.0016031265,0.056640625,-0.0006785393,-0.01890564,-0.045043945,0.0131073,-0.019836426,0.026245117,0.0030937195,-0.003206253,-0.030090332,0.038269043,0.072265625,0.019760132,-0.0055160522,-0.0035820007,-0.038360596,-0.015457153,-0.053894043,0.00793457,0.011627197,-0.0048332214,0.038208008,-0.034484863,-0.04058838,-0.0054473877,0.012046814,0.023834229,0.07116699,0.01939392,0.0025939941,0.0023174286,0.017456055,-0.03994751,0.051605225,0.021362305,0.014160156,-0.033081055,-0.022613525,0.018463135,0.04244995,-0.035614014,-0.0064926147,-0.008880615,0.017578125,-0.00045108795,-0.0022621155,0.042663574,-0.022338867,-0.02293396,-0.039520264,-0.01826477,0.022766113,0.003484726,-0.035064697,-0.04650879,-0.07672119,0.038482666,0.05831909,0.026489258,-0.004737854,0.0059318542,-0.017318726,-0.012969971,-0.06756592,0.04562378,0.054840088,-0.02999878,-0.020095825,0.02180481,-0.0131073,-0.03527832,-0.009689331,0.0010709763,-0.01826477,-0.020996094,0.0069618225,-0.04171753,0.011764526,0.02204895,0.038848877,0.039916992,-0.0017471313,-0.050567627,-0.03479004,0.00141716,0.013710022,-0.03765869,-0.02116394,-0.0035324097,0.005874634,0.021133423,0.011741638,0.019226074,-0.016662598,0.010299683,0.00015223026,-0.0042648315,-0.01651001,-0.020080566,0.024124146,-0.010879517,-0.067871094,0.016220093,-0.0016946793,0.07128906,-0.04888916,0.039245605,-0.018814087,0.015151978,0.055847168,-0.01890564,-0.059814453,0.003189087,0.024673462,0.041046143,0.036132812,0.003112793,-0.023117065,0.005004883,0.047180176,-0.005493164,0.021224976,0.0009908676,0.033691406,0.027160645,0.005809784,-0.06762695,-0.043792725,-0.013595581,-0.040405273,0.010253906,-0.030075073,0.020843506,-0.0069732666,0.00024747849,-0.04736328,0.0020980835,-0.03375244,0.017456055,-0.030303955,-0.014160156,-0.008506775,-0.0121536255,0.03262329,0.013595581,-0.012619019,0.001625061,0.028915405,0.0135269165,-0.014259338,-0.033081055,-0.0073547363,-0.01914978,0.022628784,0.015571594,0.024749756,0.0072021484,0.035949707,-0.04849243,0.010505676,0.017288208,0.01776123,0.0413208,-0.013648987,0.01838684,-0.060394287,-0.08294678,-0.022720337,-0.046051025,0.027694702,0.0033988953,-0.003255844,0.031982422,0.0001809597,-0.021240234,-0.042663574,0.030807495,-0.036224365,-0.0017938614,0.034484863,-0.013946533,-0.02960205,0.0008716583,0.019821167,0.012184143,0.028686523,0.006198883,0.012031555,0.067993164,0.054595947,0.00592041,0.02734375,0.0052375793,0.031219482,-0.012664795,-0.009605408,-0.03137207,-0.023345947,0.020568848,-0.026397705,-0.018753052,-0.0791626,0.0446167,0.027526855,0.07598877,-0.00094795227,0.020111084,0.025756836,-0.016677856,0.013832092,-0.030807495,-0.012451172,-0.031555176,-0.040222168,0.02935791,-0.0057411194,-0.0030822754,-0.014678955,0.02406311,0.003376007,0.012710571,-0.036315918,0.06970215,-0.0006518364,-0.0010442734,0.018173218,0.021560669,0.04119873,0.053527832,-0.03564453,0.02458191,0.023620605,-0.03353882,0.009590149,0.040771484,-0.0126953125,-0.021697998,-0.053497314,-0.010406494,-0.009536743,-0.012634277,-0.062286377,-0.0068893433,0.0057678223,0.030548096,0.015945435,-0.01134491,-0.029785156,0.00043964386,-0.020126343,-0.056121826,-0.018798828,-0.03286743,0.014419556,0.052978516,-0.018539429,-0.0042304993,0.0019254684,0.0069465637,0.018936157,0.0059013367,-0.01007843,-0.020339966,-0.03387451,0.016815186,0.0046081543,0.026733398,0.0048332214,0.03277588,0.024169922,0.027160645,0.04638672,0.007171631,-0.018218994,-0.06304932,0.005821228,-0.060668945,0.009544373,0.0009241104,-0.014953613,-0.006641388,-0.020507812,-0.020690918,-0.022994995,0.006702423,-0.027816772,0.021026611,0.024093628,-0.042236328,-0.045959473,-0.057739258,-0.024658203,0.0064849854,0.0871582,0.024124146,-0.00023388863,-0.048950195,-0.02671814,0.0317688,0.008979797,0.009025574,-0.014732361,-0.02758789,-0.0042686462,-0.030303955,-0.027297974,-0.03656006,0.028625488,-0.0033798218,-0.008651733,0.013290405,-0.0103302,0.021392822,-0.0025672913,0.0007338524,0.05480957,-0.028762817,-0.00010275841,-0.030181885,0.031341553,-0.0059051514,-0.015327454,-0.0569458,0.05444336,0.0154418945,0.026306152,-0.031707764,-0.0013856888,-0.0043792725,0.015022278,0.012130737,-0.014350891,-0.013252258,0.015281677,-0.035308838,-0.0317688,0.022415161,-0.013122559,0.02482605,-0.0011339188,0.0077667236,0.035888672,-0.0025501251,-0.008018494,0.02949524,-0.024734497,-0.016860962,-0.044708252,-0.04815674,-0.019577026,0.0181427,-0.02607727,0.021331787,-0.011940002,0.016921997,-0.004924774,-0.024993896,0.038482666,0.007457733,-0.0013751984,0.021133423,0.0055770874,0.0055007935,0.038360596,0.0017700195,-0.014984131,0.028137207,-0.0019817352,0.0016126633,-0.009422302,0.039093018,0.026138306,-0.007457733,0.003742218,-0.009803772,-0.013183594,-0.027008057,-0.021865845,0.0034770966,0.043151855,0.0154418945,-0.027511597,0.037597656,0.015808105,-0.022705078,-0.011123657,0.016677856,0.014678955,-0.028915405,0.01965332,0.028396606,0.056793213,-0.019577026,-0.0065994263,0.011474609,0.026062012,0.028579712,0.023345947,-0.012496948,0.010620117,-0.011871338,0.0074005127,0.009811401,-0.01914978,0.011207581,-0.0044784546,0.03274536,0.028945923,0.033966064,-0.0287323,-0.018356323,-0.013130188,-0.009407043,-0.022659302,0.019332886,0.021499634,0.01625061,-0.02494812,0.04119873,0.018951416,-0.033172607,-0.017578125,-0.009475708,0.0368042,-0.014091492,-0.008903503,0.014434814,0.019515991,0.030776978,-0.05480957,-0.00046300888,0.001411438,0.021499634,-0.01991272,-0.03982544,-0.028625488,-0.005001068,0.031677246,0.011489868,0.005634308,0.044311523,-0.006011963,-0.0018091202,0.019104004,-0.003545761,-0.012298584,-0.02180481,-0.045135498,-0.009674072,-0.009002686,-0.0043563843,-0.0065994263,0.01197052,-0.016235352,-0.024932861,0.01260376,-0.011543274,-0.01134491,-0.0007004738,0.014167786,0.023864746,0.009300232,0.015586853,-0.004211426,-0.024871826,-0.009468079,0.01259613,0.019363403,-0.04058838,0.038146973,-0.01499939,0.0098724365,-0.01133728,0.029541016,0.02520752,0.023101807,0.0034217834,0.023803711,-0.03277588,0.036254883,-0.03640747,0.013092041,0.0135269165,-0.04901123,-0.008178711,-0.028625488,-0.020690918,0.024124146,-0.025848389,-0.0051231384,-0.018081665,-0.033325195,-0.01638794,-0.060455322,0.020111084,0.021270752,0.037384033,-0.048736572,0.016418457,-0.0013685226,0.0051994324,-0.015945435,-0.0012712479,-0.0041046143,0.0052719116,0.014312744,0.006881714,-0.017791748,-0.030548096,0.0023288727,-0.009132385,-0.040405273,-0.049041748,-0.014442444,0.002664566,-0.0046691895,-0.0061454773,-0.044433594,-0.021057129,-0.008911133,-0.043548584,0.0013637543,0.012001038,0.020126343,0.027313232,-0.01977539,0.006000519,0.017196655,-0.027450562,0.019180298,-0.012496948,-0.0026416779,-0.044952393,0.0018863678,0.033447266,0.019515991,0.006286621,-0.010688782,0.00030493736,-0.010551453,-0.0524292,-0.0054969788,-0.020950317,0.020477295,-0.002161026,-0.015113831,-0.05407715,-0.009269714,-0.015365601,0.018722534,0.010009766,0.010826111,0.01977539,-0.014160156,0.0042762756,-0.021057129,-0.023010254,-0.051635742,0.0051193237,0.01071167,-0.0033473969,0.01928711,0.048614502,0.010795593,0.0040397644,0.012062073,0.003572464,0.0154800415,-0.029464722,0.013282776,-0.009559631,0.010307312,-0.008041382,-0.013122559,-0.030654907,-0.0012779236,0.06524658,-0.017501831,0.0154418945,-0.0053367615,-0.015853882,0.024551392,0.036224365,-0.061676025,0.0019235611,-0.041046143,0.021514893,-0.0066871643,0.03302002,-0.0010557175,0.025253296,-0.020568848,-0.054534912,-0.011116028,0.011833191,-0.00095272064,-0.06365967,-0.016418457,-0.068115234,-0.013427734,-0.007835388,-0.0062179565,0.0038318634,0.00699234,-0.010597229,-0.085998535,-0.012001038,0.04534912,0.008995056,0.0034713745,-0.018936157,0.033172607,0.02520752,-0.012428284,-0.030670166,0.036743164,-0.036376953,-0.010955811,-0.031585693,0.039123535,-0.009666443,-0.035064697,0.03451538,0.020111084,0.02166748,-0.015808105,0.009056091,-0.015556335,0.0010719299,-0.001789093,0.02520752,-0.0051116943,-0.025558472,0.031677246,-0.045562744,0.021316528,0.021591187,0.00015282631,0.0055503845,0.025238037,0.023788452,-0.036346436,-0.004310608,0.04031372,0.024490356,0.039733887,-0.03845215,0.030563354,0.007972717,-0.024276733,0.008811951,-0.015151978,-0.017303467,-0.05130005,-0.03414917,0.007411957,0.006095886,0.008880615,-0.017501831,0.008369446,0.023727417,0.010971069,0.009132385,-0.019805908,-0.022598267,-0.018508911,-0.0015745163,0.0034713745,0.0007491112,-0.0019741058,0.0072631836,0.013153076,0.03479004,-0.006336212,-0.008255005,0.026870728,0.017562866,-0.017730713,0.017364502,0.008346558,0.0031833649,0.01474762,0.027893066,0.022384644,-0.037902832,-0.013412476,0.0034255981,0.00036621094,0.008361816,0.00080633163,-0.02067566,0.004940033,-0.003408432,0.0072288513,-0.04220581,0.018997192,-0.03366089,-0.023101807,-0.008232117,-0.015365601,0.011619568,0.007247925,0.0020503998,0.010650635,0.0043563843,0.04852295,-0.005695343,-0.01701355,0.020431519,0.027557373,-0.002653122,-0.03074646,0.0068359375,0.008758545,-0.003610611,0.0064430237,-0.013366699,0.0154418945,0.039398193,-0.019561768,0.01335144,0.013336182,0.030593872,-0.0043258667,0.0132369995,-0.002866745,0.0073394775,-0.017074585,0.028396606,-0.0546875,0.017700195,0.026535034,0.01789856,-0.0024414062,-0.020019531,-0.027893066,0.016708374,0.020065308,-0.032562256,0.054229736,-0.0075912476,0.028579712,-0.024902344,-0.011138916,-0.0025482178,-0.023773193,-0.011955261,0.03567505,-0.0069084167,0.0063591003,0.026000977,-0.031951904,0.024627686,-0.0395813,0.013618469,0.007713318,0.013618469,-0.017059326,-0.028945923,-0.008232117,-0.014770508,-0.013999939,-0.008323669,0.011352539,0.047790527,0.027999878,0.016983032,0.026672363,0.015090942,0.004436493,-0.03930664,-0.026290894,-0.0013036728,-0.030044556,0.020751953,-0.026306152,0.047607422,0.056427002,-0.006542206,0.045135498,0.029815674,0.032836914,0.0023002625,0.011703491,-0.005130768,0.016357422,-0.02078247,0.01777649,0.025283813,0.055755615,-0.025512695,0.01625061,0.0038833618,0.030776978,-0.03363037,0.039093018,0.072143555,0.031341553,-0.005012512,0.034118652,-0.0026130676,-0.011833191,-0.012275696,-0.0077781677,0.06585693,0.0039520264,0.054595947,0.014579773,0.0067443848,-0.006954193,0.02571106,-0.022140503,-0.024932861,0.05267334,0.030151367,-0.017562866,-0.000487566,-0.011314392,0.0005698204,-0.05505371,-0.03982544,0.008529663,0.014564514,0.00028657913,0.005744934,0.003578186,-0.027297974,0.022384644,0.012710571,0.005619049,-0.006351471,0.007820129,0.01965332,0.007419586,0.021652222,0.0054244995,0.02810669,-0.017211914,-0.014930725,0.014381409,0.017227173,-0.0038661957,0.007293701,0.018798828,0.018173218,0.04949951,0.032440186,-0.017120361,-0.009780884,0.0184021,0.017684937,0.0057525635,0.03302002,0.03515625,0.0015506744,0.034210205,0.036987305,0.022857666,-0.026290894,0.011772156,-0.016525269,0.0077209473,-0.0056915283,-0.01222229,0.003622055,-0.0007266998,0.01776123,0.008255005,-0.019302368,0.03488159,0.040771484,0.0014886856,-0.0038013458,0.0037231445,0.015335083,-0.0052261353,0.007385254,0.016235352,-0.01739502,0.030181885,0.020568848,0.04171753,-0.026947021,0.032928467,0.0025177002,-0.005466461,0.003314972,0.011161804,-0.038360596,0.00066137314,-0.006439209,-0.009963989,-0.043182373,0.006427765,0.014907837,-0.007457733,0.037872314,-0.002450943,-0.004180908,0.010368347,0.026672363,0.013671875,-0.016204834,-0.015022278,-0.021194458,0.040771484,0.039367676,-0.0049362183,-0.0038604736,-0.0154800415,-0.00041127205,0.009735107,-0.0104599,-0.013244629,0.0004963875,-0.02104187,-0.039398193,0.018341064,0.043029785,0.023986816,0.029388428,-0.0017957687,-0.021347046,-0.0067443848,0.034698486,0.010238647,-0.014816284,-0.00818634,0.017623901,-0.013595581,0.05014038,0.021575928,0.0035552979,0.010009766,-0.02178955,-0.025131226,0.010185242,-0.010971069,0.009819031,-0.0093688965,0.0010118484,-0.019088745,0.02204895,-0.023452759,-0.038482666,0.0181427,-0.02230835,-0.024337769,-0.02128601,0.012550354,0.012413025,0.026397705,0.039031982,0.014968872,-0.018920898,0.064575195,-0.015335083,0.0440979,-0.017929077,0.0010547638,0.05029297,0.043182373,0.045654297,0.014640808,0.016281128,-0.03062439,0.005718231,0.050201416,0.02633667,0.015220642,-0.009033203,-0.012802124,0.037963867,-0.006877899,0.026901245,-0.015838623,-0.011375427,0.0107040405,-0.0043945312,-0.009414673,-0.005256653,-0.010871887,0.013137817,0.04168701,-0.029968262,-0.0078048706,-0.024642944,-0.0012741089,0.041503906,0.009971619,0.0057907104,0.01789856,-0.028137207,0.016616821,-0.038604736,-0.01600647,-0.00472641,0.02760315,-0.042663574,-0.021575928,0.009918213,0.019348145,-0.02722168,0.013648987,0.023544312,-0.008934021,0.021133423,0.035736084,-0.002538681,0.061035156,-0.008804321,0.01625061,0.04006958,0.0027256012,-0.01448822,0.022354126,0.017608643,-0.024917603,0.012687683,0.04244995,-0.0079956055,0.018005371,0.0077934265,-0.015113831,-0.0016021729,0.015777588,0.0024089813,-0.009132385,-0.012687683,-0.016494751,0.011772156,0.013153076,0.0045433044,0.006214142,-0.0060577393,-0.017044067,0.0043258667,0.04296875,0.010734558,-0.03894043,0.016921997,0.010292053,0.016540527,-0.015602112,-0.016723633,-0.031280518,-0.025497437,0.009132385,0.025115967,-0.00047302246,0.009513855,-0.026794434,-0.0023765564,0.025756836,0.016494751,0.024276733,0.0013952255,-0.00605011,0.022949219,-0.019882202,-0.009506226,-0.010101318,0.0014190674,0.01398468,0.010093689,-0.0057029724,-0.020629883,0.016235352,-0.0069885254,0.016189575,0.012069702,-0.010131836,0.030776978,-0.024368286,-0.005908966,0.0024547577,0.00014519691,-0.017608643,-0.025039673,-0.031829834,0.031951904,0.05130005,-0.02204895,-0.009857178,0.01374054,0.019317627,0.032043457,0.018203735,-0.0031147003,0.044433594,0.031463623,-0.010353088,-0.025482178,0.010787964,-0.017333984,-0.03503418,0.015777588,-0.010986328,-0.01939392,0.027893066,0.008796692,0.0037384033,-0.023422241,-0.009819031,-0.004470825,-0.019180298,0.021499634,-0.016952515,0.010513306,-0.022628784,-0.011123657,0.008102417,-0.022323608,-0.026504517,-0.028518677,-0.011299133,-0.014030457,-0.048583984,0.027740479,-0.023712158,0.011054993,-0.0317688,-0.0049324036,-0.008346558,0.03781128,-0.008491516,0.003276825,0.015655518,0.017593384,0.003540039,0.011627197,0.017471313,-0.020706177,-0.030883789,-0.009674072,-0.005004883,-0.017318726,0.010856628,-0.011192322,0.03842163,0.0052375793,-0.009124756,-0.0021400452,-0.0062446594,-0.005027771,0.0037956238,-0.031066895,-0.013519287,-0.00060224533,0.01687622,-0.00040602684,-0.0022144318,0.031036377,-0.020584106,-0.008522034,0.029830933,0.03451538,0.011726379,0.035888672,-0.0007529259,-0.013763428,-0.01890564,0.0023822784,-0.0124435425,0.017471313,0.011474609,0.004257202,-0.014877319,0.009315491,0.018234253,-0.010383606,-0.00945282,0.02067566,-0.003850937,-0.013175964,0.036010742,0.020568848,-0.0042381287,-0.015090942,-0.019927979,0.023803711,0.041748047,0.011940002,0.010421753,0.0015287399,0.0016155243,-0.013336182,-0.0021591187,0.01285553,-0.018630981,-0.039794922,-0.015281677,-0.022705078,0.018630981,-0.002494812,0.016403198,0.0082473755,0.0206604,-0.027709961,-0.015090942,-0.017333984,0.029342651,0.0030117035,-0.018173218,0.001786232,-0.002872467,0.010749817,-0.024291992,0.0104599,-0.042755127,-0.019683838,-0.008712769,-0.039916992,0.01713562,0.014511108,-0.004749298,-0.00472641,-0.011489868,-0.009559631,-0.0010976791,0.024215698,-0.0099487305,-0.0071983337,0.015670776,0.019439697,-0.021987915,0.013557434,-0.014854431,-0.0038433075,0.018188477,-0.010566711,0.017791748,-0.014434814,0.04071045,0.015426636,-0.008895874,0.028518677,0.0067329407,0.018478394,-0.019836426,0.012870789,-0.004016876,-0.00080633163,0.021652222,-0.030258179,-0.02029419,0.02130127,-0.016067505,-0.043762207,0.01991272,0.032287598,0.036712646,-0.023803711,0.04107666,-0.007019043,-0.009307861,0.02204895,0.008262634,-0.026748657,-0.011810303,0.03656006,0.002521515,-0.0014095306,-0.00060224533,-0.0143966675,-0.028396606,-0.0075302124,0.014602661,-0.014381409,-0.007171631,0.012229919,0.017242432,0.03375244,0.01586914,0.025939941,0.013282776,0.0008659363,0.03338623,0.007408142,0.06304932,0.0053863525,-0.02557373,0.01499939,0.011024475,-0.017425537,-0.015548706,-0.0035915375,0.00447464,-0.039733887,0.017044067,0.0012683868,0.02708435,-0.008621216,0.013282776,-0.018615723,-0.0016679764,-0.043304443,-0.012649536,-0.030380249,0.018310547,0.036895752,0.010482788,0.014274597,-0.0038776398,-0.020248413,0.02583313,0.049926758,-0.0042686462,-0.03286743,0.0056610107,0.010223389,-0.00057935715,-0.006252289,0.0042495728,-0.017791748,-0.005050659,0.002735138,-0.010665894,0.0017471313,0.002614975,0.025222778,-0.0032691956,0.0023536682,0.005558014,0.01612854,0.00019562244,-0.0018386841,0.0052604675,0.00014436245,0.018463135,0.028869629,-0.0030002594,0.024414062,0.026947021,-0.030883789,0.04071045,-0.020996094,0.008705139,-0.019088745,0.013412476,-0.052246094,-0.0045700073,-0.019180298,0.011558533],"createdAt":"2026-04-18T18:31:48.313Z","updatedAt":"2026-04-22T15:00:20.993Z","lastSeenAt":"2026-04-22T15:00:20.993Z","tsv":"'/api/endpoint-40':32,94,115 '/api/v1':106 '/api/v2':108 '/request':146 '0.02':134,145 '000':129 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':89 '20':128 '6':137 'accept':68 'access':66,159 'actual':198 'advertis':144,150 'ai':52,111 'among':119 'analyt':51,110 'api':5,19,48,65,152,166 'appear':118 'application/json':72 'base':8,22,84 'base network api' 'base-network' 'behind':93 'caller':206 'collect':42 'connect':175 'consist':139 'contact':210 'content':181 'contract':88 'data':50 'decim':138 'descript':192 'detail':214 'doc':165 'document':97,160 'endpoint':6,20,30,61,104,197,203 'exact':80 'exampl':189 'experi':208 'extrem':162 'financ':55,112 'function':92 'gate':3,17,47 'given':136 'handl':76 'host':40 'infrastructur':58 'instant':158 'json-response' 'key':153 'know':201 'label':63 'learn':54 'like':133 'limit':156 'list':102 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':53 'maximum':122 'micropayment api' 'must':207 'network':85 'openapi':185 'page':170 'part':34 'path':109 'pay':10,24 'pay-per-call api' 'pay-per-request':9,23 'payment':74,123 'per':11,25,125 'platform':38,149 'post':69 'post-method' 'premium':4,18,64 'premium api' 'price':147,167 'prompt':177 'protocol':46 'protocol-g':45 'provid':99,212 'purpos':205 'rate':155 'readm':169 'request':12,26,70,126 'request/response':188 'requir':124 'respons':73 'return':71,172 'schema':186 'scheme':81 'site':101,142 'span':49 'spars':163 'specif':91,196 'substant':180 'unit':130 'usdc':14,28,87,132,135 'usdc gated endpoint' 'usdc-payment' 'use':86 'util':59,113 'various':103 'via':77 'wallet':176 'web3':56 'without':200 'x402':2,16,44,79 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"32cbd31a-269d-45c2-9a0f-9cdc4c504959","listingId":"31e815d1-7e70-4823-80b1-8fedf517236d","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/endpoint-40","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:48.313Z"}],"sources":[{"listingId":"31e815d1-7e70-4823-80b1-8fedf517236d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-40","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:48.313Z","lastSeenAt":"2026-04-22T15:00:20.993Z"}],"details":{"listingId":"31e815d1-7e70-4823-80b1-8fedf517236d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-40 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The provider site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies USDC on Base with maxAmountRequired of 20000 and payTo address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.","source_url":"https://lowpaymentfee.com/api/endpoint-40"},{"claim":"The provider lists APIs under /api/v1/ and /api/v2/ paths but /api/endpoint-40 does not appear among them.","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages all returned only 'Connect wallet' with no substantive documentation.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an x402-gated service with USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Testing x402 protocol payment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can pay per-request with USDC on Base","Users who want keyless, commitment-free API access"],"notFor":["Anyone needing documented, well-specified API contracts","Use cases requiring known, predictable response schemas","High-volume consumers who need bulk pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:02.132Z"},"updatedAt":"2026-04-22T15:00:20.993Z"}}