{"id":"573f831b-3c7b-405f-baec-41c3fcc5d4b0","shortId":"b26r5Q","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request via USDC.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request via USDC.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint at `/api/v1/stripe/charges/55` is labeled \"Premium API Access\" and requires up to $0.02 in USDC (20,000 base units with 6 decimals) per call, settled on-chain to a specified wallet address. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header conforming to the x402 exact-payment scheme.\n\nThe broader platform advertises four categories of endpoints: 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 are listed at the same $0.02/request price point. However, the specific endpoint being listed here (`/api/v1/stripe/charges/55`) does not clearly map to any of these advertised categories — its path suggests it may relate to Stripe charge processing or a test/demo endpoint.\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 detailed documentation for any endpoint. The x402 challenge is live and well-formed, confirming the endpoint is operational, but what it actually returns upon successful payment is unknown.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","json-response"],"categories":["payments","api-marketplace"],"synonyms":["x402 API","micropayment API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","crypto-gated API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all return only a 'Connect wallet' prompt with no content.","No OpenAPI or schema definition exists for any endpoint.","The endpoint path '/api/v1/stripe/charges/55' does not correspond to any of the advertised API categories (Data, AI, Finance, Infrastructure); its actual function is unclear.","No request body schema or response schema is documented; callers cannot know what to send or what to expect back.","The '55' in the path may be an arbitrary resource ID; it is unclear if other IDs are valid."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/55","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/stripe/charges/55","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint is operational at $0.02 USDC per request. However, documentation is essentially nonexistent — no OpenAPI spec, no request/response examples, no explanation of what this specific endpoint does. The endpoint path ('stripe/charges/55') doesn't match any of the advertised API categories, raising questions about its actual purpose.","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":"2026-04-19T09:38:11.601Z","embedding":[-0.027816772,-0.015731812,0.0056419373,-0.0032863617,0.012748718,-0.021133423,-0.035339355,0.030227661,0.0546875,-0.058166504,0.034210205,-0.037963867,-0.03842163,-0.039489746,-0.03427124,0.00044465065,-0.0178833,0.018707275,-0.05166626,0.05709839,0.044830322,-0.010978699,-0.013717651,0.025222778,-0.012756348,-0.025161743,0.0013914108,-0.014434814,-0.031433105,-0.019546509,0.025619507,-0.028564453,-0.0067329407,0.0075645447,0.004760742,-0.017105103,0.0009765625,0.04147339,0.028549194,-0.0018730164,-0.001083374,-0.06506348,0.019439697,-0.008430481,-0.033172607,-0.007007599,0.037109375,-0.010871887,-0.00018787384,-0.008331299,-0.04650879,-0.0070266724,-0.014328003,0.006969452,0.014350891,0.013244629,-0.003458023,-0.0154800415,0.02142334,0.018981934,0.011444092,-0.06109619,-0.0074653625,-0.0042495728,0.010177612,0.0574646,-0.0025939941,0.045410156,0.0062026978,0.060180664,0.032836914,0.039916992,0.03302002,-0.0038490295,0.008110046,-0.029907227,0.0015468597,0.0552063,-0.015037537,0.005657196,-0.0209198,-0.00907135,-0.05960083,-0.026794434,-0.024917603,-0.07269287,-0.03665161,-0.0008125305,-0.04043579,0.022476196,-0.08660889,-0.023162842,-0.011100769,0.0019016266,0.0017709732,-0.0146484375,-0.022399902,0.008712769,0.0017356873,0.0066604614,0.0044441223,-0.039398193,0.008735657,0.016708374,0.045318604,0.041229248,0.020202637,0.04699707,-0.0038795471,-0.018341064,-0.021118164,0.021820068,-0.012077332,-0.029296875,0.018508911,0.022476196,-0.0075798035,0.026321411,-0.025222778,0.010314941,-0.06213379,0.049682617,0.02230835,-0.00090932846,0.0140686035,-0.028030396,-0.0047035217,0.0064086914,-0.046051025,-0.024856567,0.03036499,0.015625,0.026290894,-0.025619507,-0.037963867,0.009590149,-0.016204834,-0.023406982,-0.040374756,-0.01449585,0.0340271,-0.026229858,0.032928467,0.030715942,-0.08514404,-0.005268097,-0.038391113,0.026626587,-0.043792725,-0.0049209595,0.023880005,0.038269043,-0.013656616,-0.02609253,-0.032714844,-0.025527954,-0.016448975,0.03466797,-0.006580353,0.020507812,-0.011741638,0.010482788,0.018997192,0.015357971,0.012687683,0.028701782,-0.003578186,-0.0881958,-0.08062744,-0.022628784,-0.012619019,-0.01537323,-0.03967285,0.0018224716,-0.012023926,-0.072753906,-0.023376465,-0.020721436,0.007522583,-0.054260254,-0.009529114,-0.0099105835,0.014122009,-0.0128479,-0.06402588,-0.012565613,-0.020187378,0.053985596,0.019088745,0.026733398,0.0077590942,0.0017108917,0.05569458,0.03353882,-0.019165039,-0.04260254,0.023712158,-0.015411377,0.050750732,0.0054016113,0.012451172,-0.026504517,0.029083252,0.051696777,0.029266357,-0.026123047,-0.006160736,-0.05596924,-0.04071045,-0.029159546,-0.0026111603,-0.0067100525,-0.030960083,0.03656006,-0.043884277,-0.026687622,-0.00055933,0.0050582886,0.035186768,0.056274414,0.014472961,0.010307312,0.011276245,0.012313843,-0.038269043,0.05090332,0.02420044,0.015899658,-0.0046424866,-0.031921387,0.016479492,0.04272461,-0.03173828,-0.0014591217,-0.012390137,0.0028972626,-0.009170532,-0.017410278,0.016815186,-0.01461792,-0.025909424,-0.013298035,-0.0013856888,0.015655518,0.020828247,-0.037078857,-0.043548584,-0.075927734,0.029769897,0.04034424,0.034454346,0.0064735413,-0.015571594,-0.021362305,-0.022781372,-0.07421875,0.043426514,0.075683594,-0.0038318634,-0.009887695,0.040222168,-0.014190674,-0.04901123,-0.0027217865,-0.007949829,-0.019973755,-0.019073486,0.027023315,-0.051727295,-0.0016393661,0.025375366,0.026138306,0.05267334,-0.025177002,-0.03555298,-0.035186768,-0.0031375885,0.010826111,-0.022705078,0.013687134,-0.0026302338,0.02468872,0.025665283,0.00078868866,0.013206482,0.017959595,0.025405884,-0.03378296,0.0003979206,-0.021621704,-0.022033691,0.019836426,0.0039520264,-0.050872803,0.015090942,-0.021011353,0.07098389,-0.03982544,0.03945923,-0.005004883,0.03741455,0.036865234,-0.0072364807,-0.036895752,0.008232117,0.018127441,0.019958496,0.04019165,0.010345459,0.0048675537,-0.015449524,0.048583984,-0.01058197,-0.008422852,-0.0034809113,0.02192688,0.038238525,0.008544922,-0.06359863,-0.051452637,-0.013893127,-0.017822266,0.036865234,-0.026245117,0.04699707,-0.012077332,0.0078125,-0.023239136,0.010475159,-0.046783447,0.015586853,-0.028335571,-0.0053138733,-0.016540527,-0.03366089,0.0013456345,0.013442993,-0.004257202,0.010925293,0.04736328,0.01739502,-0.0357666,-0.021835327,-0.01977539,-0.021011353,-0.008491516,0.015625,0.0029296875,0.031036377,0.036224365,-0.05316162,0.009384155,0.01121521,0.0030498505,0.020904541,0.0045280457,0.00064468384,-0.05633545,-0.05319214,-0.021896362,-0.036102295,0.020614624,-0.008987427,0.016479492,0.045440674,0.001282692,-0.026321411,-0.03845215,0.015304565,-0.045135498,0.010147095,0.032714844,-0.019500732,-0.04840088,0.0032901764,-0.001543045,-0.000065386295,0.045654297,0.011833191,0.010551453,0.06829834,0.01914978,0.013908386,0.004787445,0.01272583,0.03164673,-0.005619049,-0.020065308,-0.03643799,-0.0077705383,0.033447266,-0.027999878,-0.038757324,-0.06793213,0.05303955,0.020492554,0.061645508,0.010787964,0.0107421875,0.028869629,0.0023460388,0.013938904,-0.03640747,-0.014274597,-0.037902832,-0.03930664,0.026367188,-0.015838623,-0.009597778,-0.03363037,0.023483276,-0.011878967,0.0035820007,-0.036987305,0.04547119,-0.013259888,0.00089263916,0.0047187805,0.014389038,0.0758667,0.057037354,-0.06921387,0.0028476715,0.015930176,-0.01133728,0.005268097,0.048675537,0.0053482056,-0.017242432,-0.06890869,-0.033050537,0.00069618225,-0.0074310303,-0.07727051,0.006969452,0.010116577,0.02909851,0.0020008087,0.0056610107,-0.045898438,0.006893158,-0.039855957,-0.05557251,0.0010490417,-0.050720215,0.017105103,0.029663086,-0.038238525,0.010772705,-0.018966675,0.000030040741,-0.007270813,0.011688232,-0.0011863708,-0.00074625015,-0.048187256,0.034332275,0.009521484,0.020736694,0.020141602,0.043060303,0.036956787,0.008605957,0.05227661,0.003768921,-0.019927979,-0.048461914,0.014297485,-0.022521973,0.010925293,0.008102417,-0.020233154,0.008018494,-0.0032196045,-0.037506104,-0.020889282,-0.00040745735,-0.020828247,0.003818512,0.014541626,-0.039276123,-0.025054932,-0.0519104,-0.01864624,0.0016183853,0.08850098,0.002166748,-0.011817932,-0.06726074,-0.010818481,0.030899048,0.000003695488,0.035308838,-0.015342712,-0.019744873,-0.01600647,-0.0390625,-0.015464783,-0.026306152,0.029022217,-0.0017538071,-0.018066406,0.018203735,0.015090942,0.020050049,0.0044822693,0.005859375,0.023849487,-0.017044067,-0.008720398,-0.039276123,0.009986877,0.0063591003,-0.01373291,-0.04147339,0.048583984,-0.0074653625,0.051116943,-0.04156494,0.0012760162,-0.020339966,0.007949829,0.023880005,-0.020568848,-0.0041236877,0.010940552,-0.047180176,-0.066833496,0.013473511,-0.008125305,0.013183594,0.0056037903,0.009399414,0.04208374,-0.008865356,0.010147095,0.01373291,-0.019577026,0.007167816,-0.020233154,-0.023010254,-0.020523071,0.0070877075,-0.020629883,0.014846802,-0.008995056,0.006538391,-0.011184692,-0.017181396,0.038635254,0.02418518,-0.00075769424,0.039916992,0.003112793,0.018096924,0.047210693,0.012023926,-0.044677734,0.025253296,0.0033512115,-0.008308411,-0.01864624,0.03845215,0.02406311,-0.017181396,-0.010070801,-0.0070152283,-0.0059814453,-0.007659912,-0.009498596,0.017150879,0.025222778,0.006038666,-0.046813965,0.027557373,0.014862061,-0.032043457,-0.016082764,0.014846802,0.018035889,-0.030319214,0.016601562,0.02218628,0.05569458,-0.027877808,0.011116028,0.008712769,0.03878784,0.021224976,0.012413025,0.0028476715,0.002729416,-0.015594482,0.015487671,0.0020542145,-0.017120361,0.017974854,-0.00049495697,0.024917603,0.024597168,0.00894165,-0.01914978,-0.015808105,0.0087509155,-0.007896423,-0.02482605,0.029434204,0.012184143,0.020248413,-0.01777649,0.03253174,0.02734375,-0.039733887,-0.019500732,0.0035686493,0.023376465,-0.015197754,-0.0008559227,0.021331787,-0.0033302307,0.030929565,-0.05847168,0.0058288574,-0.005580902,0.01322937,-0.008903503,-0.041534424,-0.03640747,-0.006629944,0.04171753,-0.0031661987,0.01272583,0.02859497,0.017990112,0.01108551,0.020050049,0.0061035156,0.0028266907,-0.016326904,-0.0597229,-0.021057129,-0.016815186,0.00844574,-0.028305054,0.022949219,-0.023605347,-0.043884277,0.022216797,-0.01713562,0.008361816,0.0058021545,0.011802673,0.02128601,0.003396988,0.012374878,0.0046806335,-0.027770996,-0.004558563,-0.008125305,0.03125,-0.015670776,0.00724411,-0.029876709,-0.0008416176,-0.014564514,0.005317688,0.024337769,0.030471802,0.007598877,0.02519226,-0.02835083,0.046722412,-0.023071289,0.0072631836,-0.0095825195,-0.03036499,-0.029159546,-0.03250122,-0.015930176,0.034484863,-0.018676758,0.00680542,-0.009712219,-0.03869629,-0.013671875,-0.058044434,0.016998291,0.03225708,0.04348755,-0.03100586,0.0018005371,0.0096206665,0.011047363,-0.017852783,0.0064048767,-0.007194519,0.005455017,0.03567505,0.014953613,-0.021118164,-0.018722534,-0.012382507,0.007411957,-0.06185913,-0.04916382,-0.021087646,0.030715942,0.0018625259,-0.009315491,-0.012626648,-0.03643799,-0.006351471,-0.03753662,0.018997192,-0.0009422302,0.020645142,0.011764526,-0.029434204,-0.015129089,0.011978149,-0.023757935,0.019973755,-0.0070228577,-0.0063591003,-0.03805542,-0.0028457642,0.0340271,0.0046920776,0.017593384,-0.023483276,0.0053634644,-0.020217896,-0.044921875,0.011436462,-0.013183594,0.008995056,0.004875183,-0.0012302399,-0.04925537,-0.011756897,-0.019439697,-0.0028381348,0.0128479,0.015991211,0.008140564,-0.007949829,-0.005050659,-0.008300781,-0.011528015,-0.035186768,0.014442444,0.011528015,0.012641907,0.017807007,0.046325684,-0.006099701,-0.007904053,-0.009864807,-0.00415802,0.03817749,-0.025863647,0.020477295,-0.009506226,0.014930725,-0.002538681,0.0013990402,-0.023544312,0.00083112717,0.064819336,0.010414124,0.016021729,0.0010910034,-0.01335144,0.019577026,0.030288696,-0.04058838,-0.006614685,-0.046417236,0.030715942,-0.008834839,0.010261536,0.008132935,0.020828247,-0.022323608,-0.057891846,-0.00868988,0.008148193,-0.008018494,-0.061279297,-0.022949219,-0.0647583,-0.0041046143,-0.01763916,-0.020263672,-0.013587952,0.007297516,-0.023895264,-0.08959961,0.01197052,0.055267334,0.013435364,0.025009155,-0.014862061,0.030395508,0.03353882,-0.020584106,0.0026245117,0.03189087,-0.018325806,-0.028030396,-0.018798828,0.041137695,-0.013008118,-0.018035889,0.0028514862,0.019546509,0.021148682,0.00014054775,0.019226074,-0.012794495,0.018096924,0.0020580292,-0.00024938583,-0.004837036,-0.01889038,0.03640747,-0.06915283,0.029693604,0.0060310364,0.0019283295,-0.007827759,0.034240723,0.036102295,-0.03793335,-0.0087890625,0.026153564,0.0046157837,0.047027588,-0.019592285,0.050445557,0.011932373,0.007369995,-0.0011463165,-0.00027513504,-0.0041618347,-0.037078857,-0.033996582,0.03074646,0.018035889,0.0059051514,-0.007671356,-0.0058784485,0.024917603,-0.0056648254,0.0042381287,-0.024047852,0.005191803,-0.0071411133,0.0009212494,0.013946533,0.014877319,0.003921509,0.027328491,0.02381897,0.03817749,0.007396698,-0.013160706,0.012130737,0.032684326,-0.0074920654,0.0023708344,0.021072388,0.021743774,0.030197144,0.018554688,0.014701843,-0.025146484,-0.012748718,-0.0007581711,-0.0030345917,0.0129470825,-0.019104004,0.016036987,-0.011749268,0.010063171,-0.0014019012,-0.027069092,0.00843811,-0.020492554,-0.025650024,-0.016098022,-0.011878967,0.01776123,0.007904053,-0.0053863525,0.028808594,-0.0007162094,0.06173706,-0.0066833496,0.0017986298,0.03765869,0.03640747,0.027679443,-0.029830933,-0.0049476624,-0.011192322,0.005519867,0.0088272095,-0.020217896,0.021118164,0.045440674,-0.009216309,0.017501831,-0.012359619,0.014083862,0.0033893585,0.014755249,-0.0118637085,0.011878967,-0.016998291,0.047973633,-0.04373169,0.026931763,0.022644043,0.0023899078,-0.006462097,-0.014968872,-0.01789856,0.025253296,0.007217407,0.00035858154,0.042938232,-0.0076065063,0.012367249,-0.030151367,-0.023605347,-0.005214691,-0.025909424,-0.030975342,0.014442444,-0.0037345886,0.011940002,-0.0021190643,-0.025146484,0.02027893,-0.040496826,0.017822266,0.0037059784,0.010864258,-0.019897461,-0.017242432,-0.007713318,-0.018417358,-0.019088745,0.014122009,-0.00023305416,0.03036499,0.031143188,0.015640259,0.039031982,0.0051231384,-0.006576538,-0.032928467,-0.028656006,-0.0038452148,-0.030822754,-0.005378723,-0.014541626,0.036254883,0.046936035,0.012702942,0.038208008,0.035247803,0.039093018,-0.0019607544,0.023040771,-0.018981934,0.022201538,-0.0105896,0.030334473,0.0034980774,0.030426025,-0.026107788,0.011138916,-0.0066184998,0.027435303,-0.019256592,0.02180481,0.07696533,0.020904541,-0.007545471,0.041931152,-0.009712219,-0.010643005,-0.026184082,-0.020889282,0.06109619,0.019897461,0.04019165,0.0418396,0.005432129,-0.006149292,0.016998291,-0.021377563,-0.011314392,0.058532715,0.011688232,-0.034423828,-0.015167236,-0.008056641,0.01411438,-0.03729248,-0.008079529,0.019302368,-0.011474609,0.015853882,-0.010772705,-0.008666992,-0.0079956055,0.0059127808,-0.00030255318,0.017227173,-0.019638062,0.006275177,0.015777588,0.012771606,0.024337769,0.0073509216,0.019683838,-0.044128418,-0.027740479,-0.0015182495,0.018157959,0.0051956177,0.007411957,0.035614014,0.022659302,0.029876709,0.029556274,-0.014770508,-0.014259338,0.024276733,0.008544922,-0.0019292831,0.04660034,0.033569336,0.01928711,0.029907227,0.042297363,0.027893066,-0.04071045,0.021957397,-0.0022678375,0.012794495,-0.0027160645,-0.022109985,0.01612854,0.008110046,0.007423401,0.00019979477,-0.009002686,0.026306152,0.021575928,-0.020248413,0.00047373772,0.006298065,0.0098724365,-0.003862381,0.0064430237,0.0020942688,-0.023117065,0.01826477,0.023071289,0.03463745,-0.034362793,0.026046753,-0.005126953,-0.023208618,-0.008041382,0.0075569153,-0.03451538,0.007598877,-0.010231018,-0.008895874,-0.02557373,0.007217407,0.00036215782,-0.0009379387,0.0028133392,0.015289307,-0.0059318542,0.00068473816,0.015960693,0.025024414,0.00089883804,-0.0035648346,-0.0078125,0.023422241,0.04864502,-0.0046920776,-0.00031876564,-0.0335083,0.009651184,0.016860962,-0.013206482,-0.011817932,0.0069732666,-0.012908936,-0.018066406,0.02104187,0.04058838,0.020187378,0.039489746,-0.026031494,-0.0070343018,0.010360718,0.020568848,0.005393982,-0.0018672943,0.015113831,0.02166748,-0.014099121,0.04473877,0.030075073,0.0017089844,0.020965576,-0.0032310486,-0.0063972473,-0.0013284683,-0.028060913,0.026062012,-0.030532837,0.012969971,-0.017562866,0.017807007,-0.020568848,-0.039764404,0.013343811,-0.010429382,-0.0287323,-0.024551392,0.016342163,0.001159668,0.015701294,0.033111572,0.033111572,-0.027313232,0.06707764,-0.009712219,0.06500244,0.0028800964,0.0019607544,0.040740967,0.036895752,0.03878784,0.008338928,0.012611389,-0.018310547,0.008140564,0.041656494,0.028884888,0.009284973,0.015731812,-0.020904541,0.05130005,-0.005630493,0.029266357,-0.015449524,-0.0067825317,0.00579834,-0.00187397,-0.010314941,-0.0051574707,-0.004524231,0.020629883,0.05480957,-0.028701782,-0.024414062,-0.043640137,-0.0062408447,0.022567749,-0.014953613,0.0068206787,-0.0050201416,-0.009689331,0.014724731,-0.03488159,-0.020370483,0.01876831,0.02848816,-0.042419434,-0.030197144,0.009338379,0.025436401,-0.024414062,0.033325195,0.020721436,-0.014259338,0.008346558,0.04901123,0.00020325184,0.047821045,-0.00044465065,0.034362793,0.04751587,0.0009946823,-0.020950317,-0.00028848648,0.012535095,-0.006034851,0.019882202,0.039916992,0.003774643,0.0028076172,0.00021016598,-0.023666382,-0.00030231476,0.00333786,-0.021530151,-0.003774643,0.0033912659,-0.011253357,0.010124207,0.010253906,0.00027632713,-0.0037956238,-0.0038967133,-0.006603241,0.006980896,0.02078247,0.021835327,-0.039031982,0.00005030632,0.017440796,-0.01184845,-0.02809143,-0.011459351,-0.005420685,-0.030075073,0.018310547,0.02986145,0.018356323,0.0038394928,-0.020904541,0.004333496,0.038604736,0.012519836,0.020858765,0.018157959,-0.01084137,0.009864807,-0.023406982,-0.0056266785,-0.0066223145,-0.0013570786,-0.0043525696,0.024795532,-0.0044403076,-0.016662598,0.02658081,0.012496948,0.01637268,0.004589081,0.0002374649,0.029296875,-0.014823914,-0.010307312,-0.0014381409,0.008735657,-0.008865356,-0.026885986,-0.025863647,0.031036377,0.05645752,-0.009773254,-0.0012741089,0.013763428,0.028625488,0.03164673,0.035186768,0.014541626,0.045074463,0.017456055,-0.0078125,-0.009498596,0.018859863,-0.008018494,-0.021362305,0.0149002075,-0.010643005,-0.02508545,0.01499176,0.0007548332,-0.014579773,-0.02961731,-0.02557373,-0.002313614,-0.012557983,0.016845703,0.000081539154,0.015541077,-0.038360596,-0.017318726,0.0057296753,-0.015266418,-0.04336548,-0.018432617,-0.013511658,-0.020309448,-0.053344727,0.0031013489,-0.024597168,0.011367798,-0.029373169,0.0020694733,-0.0067863464,0.023864746,-0.014884949,0.006336212,0.0031337738,0.03201294,0.01008606,0.013191223,0.012313843,-0.02558899,-0.016082764,0.0027332306,-0.0055503845,-0.018508911,0.025344849,-0.009109497,0.043029785,-0.0014209747,-0.012298584,0.0024719238,-0.014381409,-0.0058937073,0.008010864,-0.027297974,-0.024154663,0.020217896,0.025314331,-0.015571594,-0.00724411,0.038208008,-0.021850586,-0.023498535,0.017120361,0.037384033,0.020629883,0.037902832,-0.013305664,0.006000519,-0.032318115,0.0033607483,-0.021774292,0.0032196045,-0.0014820099,0.0038852692,-0.00028538704,0.009490967,0.011383057,-0.013389587,-0.024627686,0.025558472,0.0184021,-0.017700195,0.03729248,0.01675415,0.012519836,-0.015380859,-0.0021476746,0.0155181885,0.056121826,0.0030384064,0.018203735,-0.004322052,0.016189575,-0.01852417,0.013786316,0.016113281,-0.013114929,-0.0440979,-0.018478394,-0.016677856,0.018981934,-0.0058174133,0.01689148,-0.005996704,0.01977539,-0.0003259182,-0.036376953,-0.01576233,0.018356323,-0.004550934,-0.015686035,-0.015853882,0.0093307495,0.013008118,-0.033996582,0.012634277,-0.044921875,-0.027038574,-0.027023315,-0.021697998,0.037017822,-0.0035552979,-0.015609741,0.0010766983,-0.0033130646,-0.0027179718,0.006626129,0.038635254,-0.008178711,-0.0024871826,0.0155181885,0.037017822,-0.016525269,0.015045166,0.0047950745,-0.012191772,0.015327454,-0.0071372986,0.019546509,-0.015991211,0.03491211,0.010185242,-0.0011482239,0.026229858,-0.0096206665,0.021621704,-0.010047913,-0.014152527,-0.011581421,-0.010147095,0.027954102,-0.009361267,-0.017944336,0.005756378,-0.01259613,-0.038116455,0.008338928,0.023529053,0.04800415,-0.031555176,0.05178833,-0.020233154,-0.009498596,-0.01209259,0.009033203,-0.024215698,0.0039482117,0.02281189,0.0045318604,0.00390625,-0.0061950684,-0.015533447,-0.021057129,-0.012268066,0.013679504,-0.008300781,-0.0074691772,0.009651184,0.004283905,0.031982422,0.004852295,0.016296387,0.021942139,0.00932312,0.030334473,-0.006134033,0.040222168,0.0020484924,-0.02444458,0.0016336441,0.0069618225,-0.007865906,0.00667572,0.0033893585,0.010101318,-0.030014038,0.014259338,-0.0059318542,0.03753662,-0.020263672,0.009666443,-0.020004272,0.0033740997,-0.03744507,0.013206482,-0.03756714,0.0014305115,0.043884277,0.0014820099,0.013885498,0.00025725365,-0.018417358,0.029968262,0.052703857,-0.007572174,-0.034973145,-0.013977051,0.0035705566,-0.0052223206,-0.0011234283,0.00969696,-0.031341553,-0.013298035,-0.0056533813,-0.014541626,-0.006000519,-0.014015198,0.016647339,0.0146484375,0.003293991,-0.011680603,0.024841309,-0.0049934387,0.004550934,-0.005832672,-0.0023956299,0.030822754,0.038635254,-0.02897644,0.022720337,0.013549805,-0.027008057,0.043518066,-0.010131836,0.016235352,-0.027313232,0.004234314,-0.025146484,-0.021331787,-0.010910034,-0.0020599365],"createdAt":"2026-04-18T18:54:28.231Z","updatedAt":"2026-04-22T18:32:10.043Z","lastSeenAt":"2026-04-22T18:32:10.043Z","tsv":"'/api':215 '/api/v1/stripe/charges/55':69,184 '/docs':214 '/pricing':216 '/readme':218 '/request':17,36,174 '0.02':16,35,79,173 '000':83 '20':82 '6':87 'Base network API' 'USDC API access' 'access':49,74 'actual':263 'address':99 'advertis':129,193 'ai':10,29,141 'analysi':145 'analyt':135 'api':4,23,45,73,101 'attach':112 'base':7,26,63,84 'base-network' 'behind':55 'broader':127 'call':90 'caller':110 'categori':131,194 'chain':94 'challeng':248 'charg':203 'classif':148 'clear':187 'commit':107 'confirm':255 'conform':118 'connect':224 'content':230 'convers':165 'crypto-gated API' 'data':9,28,134,138 'decim':88 'detail':241 'document':209,242 'embed':149 'endpoint':14,33,54,67,133,180,208,245,257 'estim':159 'exact':123 'exact-pay':122 'exampl':238 'exchang':154 'export':139 'extrem':211 'feed':153 'financ':11,30,150 'form':254 'four':130 'gas':158 'gate':3,22,48 'generat':166 'geocod':163 'header':117 'howev':177 'infrastructur':161 'insight':140 'json-response' 'key':102 'label':71 'learn':143 'limit':104 'list':169,182 'live':250 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':142 'map':188 'marketplac':46 'may':199 'metric':136 'micropay':60 'micropayment API' 'network':64 'no-api-key' 'offer':8,27 'on-chain':92 'openapi':234 'oper':259 'page':219 'path':196 'pay-per-request API' 'payment':116,124,267 'per':57,89 'per-request':56 'per-request-billing' 'platform':5,24,128 'point':176 'premium':72 'price':152,175 'process':204 'prompt':226 'protocol':44 'quot':157 'rate':103,155 'relat':200 'report':137 'request':58 'request/response':237 'requir':76,109 'return':221,264 'schema':235 'scheme':125 'sentiment':144 'settl':91 'simpli':111 'spars':212 'specif':66,179 'specifi':97 'stripe':202 'substant':229 'success':266 'suggest':197 'summar':147 'test/demo':207 'text':146 'token':156 'unit':85 'unknown':269 'upfront':106 'upon':265 'usdc':19,38,59,81 'usdc-micropayment' 'util':13,32,162 'valid':164 'varieti':52 'via':18,37 'wallet':98,225 'web3':151 'well':253 'well-form':252 'x':115 'x-payment':114 'x402':2,21,43,121,247 'x402 API' 'x402-gated':1,20 'x402-payment' 'x402-protocol':42","prices":[{"id":"bfe27c8d-af3d-495d-9a2e-fcc808337250","listingId":"573f831b-3c7b-405f-baec-41c3fcc5d4b0","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/stripe/charges/55","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:28.231Z"}],"sources":[{"listingId":"573f831b-3c7b-405f-baec-41c3fcc5d4b0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/55","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:28.231Z","lastSeenAt":"2026-04-22T18:32:10.043Z"}],"details":{"listingId":"573f831b-3c7b-405f-baec-41c3fcc5d4b0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/55 \\\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 requiring up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/55"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/55"}],"useCases":["Paying per-request for API access without needing API keys or subscriptions","Programmatic agent access to gated endpoints using x402 on-chain payments","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-as-you-go API access on Base","Projects wanting to avoid API key management and rate limits"],"notFor":["Production workloads requiring documented, well-specified API contracts","Users who need detailed response schemas and error handling documentation","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.374Z"},"updatedAt":"2026-04-22T18:32:10.043Z"}}