{"id":"7413d9ea-f37c-4ab8-9c54-8b8dfcf903c7","shortId":"tSmEC7","kind":"x402","title":"Premium API access via x402 micropayment on Base network, $0.02/request in USDC.","tagline":"Premium API access via x402 micropayment on Base network, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific endpoint `/api/v1/apikeys/91` accepts POST requests and charges 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.\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 utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02/request with no API keys, no rate limits, and instant access.\n\nHowever, the specific endpoint probed (`/api/v1/apikeys/91`) does not clearly map to any of the advertised API categories—it appears to be an API key provisioning or access endpoint. Documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no substantive content, so the exact functionality of this particular endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","per-request-micropayment","post-method","json-response"],"categories":["infrastructure","api-access"],"synonyms":["premium API","pay-per-request API","x402 API","USDC micropayment endpoint","Base network API","lowpaymentfee"],"warnings":["No documentation available—all doc pages return only 'Connect wallet' prompt","The specific endpoint /api/v1/apikeys/91 does not clearly correspond to any advertised API category","No OpenAPI schema or response examples available","Exact functionality and expected input/output of this endpoint are unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/apikeys/91","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/91","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example requests/responses, and the specific purpose of the /api/v1/apikeys/91 endpoint is ambiguous. All doc pages returned only 'Connect wallet' with no content.","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":"2026-04-19T15:21:16.019Z","embedding":[-0.016174316,-0.03942871,0.051757812,0.0256958,0.032989502,-0.03527832,-0.033081055,0.064697266,0.0637207,-0.053131104,0.01373291,-0.030792236,-0.03527832,-0.022781372,-0.03237915,0.0063667297,-0.0146865845,0.008529663,-0.058288574,0.044525146,0.05154419,-0.017105103,-0.008682251,0.035614014,0.020996094,-0.023635864,-0.012329102,-0.024459839,-0.0012807846,-0.0289917,0.02558899,-0.029190063,-0.0059394836,0.033691406,-0.03488159,-0.026245117,0.0067634583,0.029693604,0.052368164,-0.015640259,-0.0110321045,-0.0670166,0.004962921,0.012557983,-0.03955078,0.008605957,-0.0047187805,-0.025314331,-0.014801025,-0.006412506,-0.03845215,-0.0124053955,-0.017044067,-0.018051147,0.0072898865,0.016738892,-0.0008893013,-0.019851685,-0.0014858246,0.0128479,-0.0020332336,-0.060516357,0.0074310303,-0.0009608269,0.0061454773,0.038604736,-0.00011444092,0.033996582,0.009643555,0.047943115,0.05618286,0.05557251,0.020355225,0.021148682,0.0060157776,0.003566742,-0.01638794,0.07269287,-0.01966858,0.0024433136,-0.011482239,0.013389587,-0.029754639,-0.0119018555,-0.015525818,-0.04724121,-0.006668091,0.0037212372,-0.0095825195,0.02532959,-0.059387207,-0.0149383545,-0.0124435425,0.023864746,0.024902344,-0.011375427,-0.017608643,0.016662598,-0.016784668,0.022644043,0.011734009,-0.04336548,0.011146545,0.02748108,0.043273926,0.040649414,0.015258789,0.037628174,0.009681702,-0.021530151,-0.015357971,0.0082092285,-0.018249512,-0.02166748,0.019378662,0.0075912476,-0.023513794,0.010536194,-0.037231445,0.01007843,-0.057922363,0.048553467,0.03845215,-0.023162842,-0.0005812645,-0.058288574,-0.0018911362,0.0131073,-0.029647827,-0.01335144,0.044036865,0.010765076,0.035888672,-0.013244629,-0.031799316,0.014251709,0.0060691833,-0.025009155,-0.040618896,-0.030899048,0.034973145,-0.019561768,0.03543091,0.022613525,-0.09075928,-0.0047912598,-0.054260254,0.013473511,-0.026565552,-0.0032672882,0.014060974,0.0044822693,-0.021759033,-0.023040771,-0.0059928894,-0.023208618,0.0149002075,0.03665161,-0.013664246,0.029144287,-0.0049552917,0.048095703,0.010543823,0.013145447,0.03048706,0.04345703,-0.0018596649,-0.08843994,-0.09429932,-0.041412354,-0.027236938,-0.017440796,-0.033081055,0.0055656433,-0.004714966,-0.0635376,-0.016036987,-0.025787354,-0.0022010803,-0.02204895,-0.005672455,-0.025161743,0.0025100708,-0.0024051666,-0.05166626,-0.010955811,-0.028152466,0.07409668,0.010421753,0.0052490234,0.041992188,-0.018066406,0.05130005,0.009353638,-0.017944336,-0.043426514,0.0034389496,-0.016799927,0.021652222,0.0084991455,-0.008331299,-0.046875,0.0317688,0.065979004,0.018417358,-0.0029678345,-0.002532959,-0.04815674,-0.020309448,-0.029464722,-0.011795044,0.0067329407,-0.007209778,0.0413208,-0.037628174,-0.037719727,-0.026626587,0.020339966,0.02017212,0.05557251,-0.01084137,-0.012481689,0.016479492,0.027709961,-0.043121338,0.03616333,0.03479004,0.010223389,-0.037261963,-0.033996582,0.023239136,0.046325684,-0.03390503,0.0134887695,-0.018417358,0.022994995,-0.0020999908,0.004501343,0.026565552,0.002401352,-0.011978149,-0.03387451,-0.01889038,0.036743164,0.0009965897,-0.021560669,-0.040771484,-0.059509277,0.044952393,0.034973145,0.046783447,-0.008926392,0.004966736,-0.018630981,0.0059814453,-0.051605225,0.04071045,0.08502197,-0.030258179,-0.010063171,0.00945282,-0.012252808,-0.01939392,-0.021987915,0.005672455,-0.03201294,-0.031143188,0.021209717,-0.027328491,0.02079773,0.00024092197,0.025604248,0.05432129,-0.0071640015,-0.017868042,-0.02418518,-0.00522995,0.0062294006,-0.046936035,-0.012207031,0.0027580261,-0.0082473755,0.039916992,-0.00044488907,0.021087646,-0.008857727,0.0119018555,-0.0022411346,-0.030563354,-0.043701172,-0.031921387,0.005748749,-0.0025672913,-0.05569458,0.025039673,-0.0037345886,0.06524658,-0.03237915,0.02418518,-0.019180298,0.029876709,0.03253174,-0.013069153,-0.052734375,0.009407043,0.030059814,0.020004272,0.04055786,0.011238098,-0.016708374,0.0031719208,0.053710938,-0.010986328,-0.009010315,0.0019874573,0.021652222,0.00969696,-0.00021672249,-0.040130615,-0.022094727,-0.04043579,-0.042877197,0.0004274845,-0.041137695,0.032684326,-0.0124435425,-0.008018494,-0.017089844,-0.017990112,-0.03656006,0.034851074,-0.026184082,0.017181396,-0.030151367,-0.029678345,0.018630981,0.03543091,-0.022064209,-0.01235199,0.03527832,0.03302002,-0.02053833,-0.035980225,0.009391785,-0.011756897,0.01499176,0.03302002,0.015304565,0.010154724,0.03894043,-0.036865234,0.019363403,0.030593872,0.00036525726,0.030563354,-0.019012451,0.012710571,-0.056152344,-0.055633545,-0.028121948,-0.024658203,0.004337311,-0.00687027,-0.004009247,0.040008545,-0.009895325,-0.018371582,-0.059143066,0.022781372,-0.050323486,0.0055274963,0.034362793,0.0059814453,-0.03161621,-0.013908386,0.009735107,-0.0018167496,0.04647827,0.008224487,0.008430481,0.06512451,0.03845215,-0.004547119,0.02519226,0.015106201,0.020767212,-0.015319824,-0.03604126,-0.040924072,0.021453857,0.018630981,-0.013465881,-0.015090942,-0.081604004,0.04751587,0.046417236,0.04901123,0.02305603,0.007171631,0.03363037,-0.022125244,0.0023880005,-0.018066406,0.006839752,-0.0074768066,-0.04156494,0.012138367,-0.014099121,-0.013809204,-0.014770508,0.027893066,-0.00793457,0.017929077,-0.034057617,0.062408447,0.008110046,-0.00028514862,0.0048599243,0.0044822693,0.024871826,0.039855957,-0.046539307,0.026641846,0.029373169,-0.032043457,0.007873535,0.056793213,-0.017303467,-0.042022705,-0.074035645,-0.028045654,-0.00459671,-0.016616821,-0.04675293,-0.0072669983,0.0098724365,0.013664246,0.012512207,-0.036193848,-0.03479004,0.0028533936,-0.029754639,-0.05508423,-0.013771057,-0.032409668,0.005115509,0.033111572,-0.021133423,-0.014350891,0.013969421,0.0009994507,-0.011222839,0.009185791,0.0049591064,0.007987976,-0.050811768,0.015792847,0.02458191,0.012527466,0.023269653,0.02230835,0.036499023,0.017364502,0.059143066,0.02458191,-0.027175903,-0.0390625,0.022216797,-0.049346924,-0.0010700226,0.0036773682,-0.017059326,-0.010307312,-0.007507324,-0.031799316,-0.030151367,0.018341064,-0.033355713,0.017547607,0.031280518,-0.04852295,-0.015823364,-0.075805664,-0.026901245,-0.00066185,0.06262207,0.033111572,0.0010967255,-0.059539795,-0.017349243,0.019439697,0.0012903214,0.026290894,-0.013656616,-0.029342651,-0.009277344,-0.022766113,-0.01977539,-0.023513794,0.035369873,0.016342163,-0.024291992,0.019515991,0.01259613,-0.005168915,0.0011310577,0.022613525,0.033599854,-0.034454346,-0.010726929,-0.021575928,0.019012451,-0.0058937073,-0.013694763,-0.035888672,0.052825928,0.007003784,0.03010559,-0.03466797,-0.0021572113,0.0034542084,0.011726379,0.0309906,-0.005592346,-0.015609741,0.005332947,-0.04650879,-0.054016113,0.028244019,-0.023956299,0.034820557,-0.0021877289,0.019622803,0.021347046,-0.0025939941,-0.0061454773,0.025360107,-0.03253174,-0.0061454773,-0.017166138,-0.017333984,-0.009811401,0.012008667,-0.019378662,0.0037879944,-0.017028809,0.007537842,0.005847931,-0.020355225,0.033050537,0.015609741,0.019577026,0.025238037,0.009437561,0.018066406,0.055236816,0.007858276,-0.021820068,0.029678345,-0.0036735535,0.00566864,-0.01171875,0.03353882,0.034057617,-0.03060913,0.00064086914,-0.003540039,-0.005935669,-0.014350891,-0.017791748,0.015670776,0.019134521,-0.0110321045,-0.0446167,0.030258179,0.041015625,-0.028167725,-0.014595032,0.034210205,0.024002075,-0.030639648,0.04849243,0.040802002,0.062683105,-0.0016384125,-0.0057144165,0.0074768066,0.03741455,0.019851685,0.011917114,-0.028503418,0.014709473,-0.021987915,0.013641357,-0.0104599,0.0016841888,0.024932861,0.0014886856,0.014915466,0.031066895,0.014533997,-0.019485474,-0.03945923,0.012672424,0.0046806335,0.0018577576,0.025390625,0.011116028,0.015701294,-0.023483276,0.029220581,0.01701355,-0.030380249,-0.02671814,-0.0062217712,0.055267334,-0.012519836,-0.0028095245,0.01586914,-0.000120699406,0.015419006,-0.06536865,0.00907135,0.0138168335,0.027175903,-0.030059814,-0.04220581,-0.03652954,0.01461792,0.03060913,0.015701294,0.023971558,0.023788452,-0.0011043549,-0.003709793,0.025878906,0.00868988,0.0028648376,-0.0151901245,-0.048309326,-0.019210815,0.0018358231,-0.0018796921,-0.028076172,0.00881958,-0.009277344,-0.025253296,0.0051345825,-0.011680603,-0.008041382,-0.003921509,0.011413574,0.015686035,0.013923645,0.005580902,-0.016983032,-0.01007843,0.017623901,0.007980347,0.023406982,-0.03225708,0.029037476,-0.011192322,-0.005340576,-0.010238647,0.017303467,0.02998352,0.03060913,0.0007314682,0.04031372,-0.037506104,0.03668213,-0.038635254,0.011604309,-0.003572464,-0.036468506,0.009086609,-0.021514893,-0.016784668,0.029846191,-0.00957489,-0.00699234,-0.024032593,-0.021270752,0.002653122,-0.046081543,0.012306213,0.016113281,0.038146973,-0.036621094,0.0121536255,0.00033640862,-0.0038776398,-0.011047363,0.005554199,-0.01084137,0.008796692,0.024002075,-0.0032863617,-0.023849487,-0.03237915,-0.008636475,-0.008857727,-0.03010559,-0.040008545,-0.0052261353,0.015716553,-0.008720398,0.0028438568,-0.029724121,-0.02519226,-0.0042266846,-0.044128418,0.010223389,-0.013465881,0.009681702,-0.0062026978,-0.002046585,0.010192871,0.031921387,-0.027023315,0.031051636,0.012886047,0.008666992,-0.025939941,-0.0040893555,0.047698975,0.016204834,0.026931763,-0.015396118,-0.022857666,-0.014175415,-0.05041504,-0.015281677,0.0024356842,-0.0017309189,0.0036144257,-0.0008635521,-0.046417236,-0.0074386597,-0.024307251,0.0013027191,0.024124146,0.02027893,0.019805908,0.00038313866,0.0019931793,-0.01007843,-0.0019950867,-0.0413208,0.0079574585,0.009742737,0.004962921,0.013412476,0.042144775,0.014915466,0.0031661987,0.019241333,-0.020553589,0.013183594,-0.012077332,0.019973755,-0.011734009,0.00043582916,-0.0025634766,-0.01977539,-0.027328491,-0.009025574,0.07800293,-0.01134491,-0.004096985,0.008300781,-0.0070495605,0.021743774,0.027816772,-0.06384277,-0.015380859,-0.038330078,0.008743286,0.0016975403,0.030914307,-0.0016269684,-0.0014038086,-0.018859863,-0.056915283,-0.0011825562,0.013183594,-0.01436615,-0.056152344,-0.0134887695,-0.054626465,-0.014343262,0.0037765503,-0.024093628,-0.0029621124,-0.0029468536,-0.0010261536,-0.08251953,0.012023926,0.030334473,0.0234375,0.027862549,-0.01689148,-0.0015993118,0.025360107,-0.029953003,-0.02381897,0.041656494,-0.022216797,-0.029296875,-0.03543091,0.023361206,-0.028305054,-0.027130127,0.03881836,0.008071899,0.04196167,-0.0096588135,0.021347046,-0.015625,0.005973816,-0.012863159,0.030151367,-0.016647339,-0.008895874,0.027786255,-0.040863037,0.022827148,0.020721436,0.0028038025,-0.00009095669,0.020004272,0.034606934,-0.046875,-0.0028305054,0.026367188,-0.006126404,0.037322998,-0.032989502,0.041992188,0.013755798,-0.022903442,0.022903442,0.0003399849,-0.02998352,-0.049865723,-0.01739502,0.02418518,0.022537231,0.029449463,-0.008392334,0.0018100739,0.024429321,-0.0096206665,0.012931824,-0.024276733,-0.0022945404,-0.012367249,-0.007133484,-0.0013837814,-0.004360199,-0.009086609,0.03186035,0.0074005127,0.048675537,0.01423645,-0.008544922,0.026184082,0.018936157,-0.014808655,0.000014364719,0.014137268,0.00027251244,0.008514404,0.017028809,0.014251709,-0.032806396,-0.011169434,-0.029312134,0.0030822754,0.01158905,-0.014808655,-0.011024475,-0.01084137,-0.005935669,0.013542175,-0.040618896,0.0234375,-0.041168213,-0.029190063,-0.0035972595,-0.022079468,0.013999939,0.013832092,0.015563965,0.01663208,0.008613586,0.06866455,0.007762909,0.0036830902,0.01890564,0.040496826,0.01171875,-0.028656006,-0.019348145,-0.0037498474,0.017486572,0.008995056,-0.021072388,0.013412476,0.032073975,-0.01663208,0.008972168,-0.005458832,0.026062012,-0.016601562,0.010368347,-0.003435135,0.01763916,-0.032806396,0.029449463,-0.034484863,0.009971619,0.018554688,0.004234314,0.0035190582,-0.029769897,-0.033447266,0.0060539246,-0.002954483,-0.029388428,0.04916382,-0.007068634,0.022918701,-0.00944519,-0.011230469,0.0055618286,-0.028076172,-0.006828308,0.04714966,-0.014633179,0.0032615662,0.01524353,-0.027435303,0.03878784,-0.024871826,0.011505127,0.015792847,-0.0028457642,-0.029266357,-0.008224487,-0.038909912,-0.007019043,0.008293152,-0.014953613,0.0077056885,0.043548584,0.03225708,0.021591187,0.04711914,-0.0024528503,0.014060974,-0.04321289,-0.027664185,-0.0003066063,-0.027542114,0.014152527,-0.0030937195,0.054016113,0.037719727,-0.012176514,0.028274536,0.034088135,0.020477295,0.0019760132,0.0093307495,-0.025482178,0.018249512,-0.006706238,0.031402588,0.015296936,0.028839111,-0.018508911,-0.0038146973,0.0010938644,0.0132369995,-0.03741455,0.040618896,0.08270264,0.01737976,0.006713867,0.017120361,0.003458023,-0.0119018555,-0.019317627,-0.02230835,0.06088257,0.010040283,0.046661377,0.046691895,0.011016846,0.0015983582,0.019943237,-0.032226562,-0.024475098,0.07019043,0.022354126,-0.037902832,-0.012619019,-0.023010254,-0.01134491,-0.047180176,-0.044708252,0.0017786026,-0.01158905,0.002122879,-0.012145996,0.007270813,-0.013092041,0.030517578,0.02583313,0.0043754578,-0.012702942,0.034851074,0.022827148,0.011779785,0.014122009,-0.023971558,0.03543091,-0.026138306,-0.0064888,0.005859375,0.009376526,-0.005168915,-0.0071144104,0.023361206,0.0043525696,0.048217773,0.038635254,-0.0209198,0.007698059,0.016204834,0.013168335,0.0010919571,0.036956787,0.03125,0.012535095,0.017456055,0.038238525,0.024261475,-0.021759033,0.016235352,-0.022445679,-0.0016889572,-0.010803223,-0.016571045,0.004650116,-0.009552002,0.0065994263,0.015220642,-0.013679504,0.03314209,0.033233643,0.0030574799,0.0033683777,-0.015380859,0.005302429,-0.011390686,0.0109939575,0.018936157,-0.014175415,0.032287598,0.014961243,0.018997192,-0.046051025,0.015975952,-0.0039482117,-0.010902405,-0.0037975311,0.013885498,-0.04144287,-0.0066986084,-0.010276794,0.003419876,-0.05041504,0.014572144,0.016586304,-0.017623901,0.034332275,0.010322571,-0.016036987,0.007827759,0.010124207,0.0005044937,-0.015991211,-0.008399963,-0.023712158,0.032287598,0.03164673,0.00075912476,0.03466797,-0.021484375,-0.007659912,-0.010360718,-0.0053596497,-0.008262634,0.006046295,-0.02015686,-0.03543091,0.0061302185,0.043182373,0.01939392,0.020599365,-0.005180359,-0.017486572,0.00077819824,0.015960693,0.0152282715,0.0059890747,-0.002840042,0.029724121,0.0024471283,0.052734375,0.03604126,-0.0035247803,0.009735107,-0.024795532,-0.0181427,0.0026111603,-0.02104187,0.019744873,-0.025604248,0.015319824,-0.013961792,0.023040771,-0.011672974,-0.039245605,0.00868988,-0.011108398,-0.0021896362,-0.027786255,0.0029029846,-0.0023822784,0.02218628,0.03970337,0.017944336,-0.03125,0.06414795,-0.011741638,0.05883789,-0.017791748,-0.006641388,0.038085938,0.028625488,0.03439331,-0.00083351135,0.013656616,-0.01776123,0.015296936,0.060760498,0.024734497,0.013145447,0.0025405884,-0.021911621,0.03640747,0.0059890747,0.036376953,-0.021484375,-0.0127334595,0.007534027,0.0034923553,-0.0058403015,0.01259613,-0.0063705444,0.011756897,0.036346436,-0.03805542,-0.0046310425,-0.020843506,-0.01878357,0.017654419,-0.010093689,0.018478394,-0.0075645447,-0.034240723,0.02267456,-0.02583313,0.0011501312,-0.0013484955,0.033569336,-0.04763794,-0.025024414,0.012214661,0.02104187,-0.029266357,0.026931763,0.030181885,0.0006957054,0.011947632,0.04147339,0.00015032291,0.055023193,0.0035686493,0.01966858,0.04916382,-0.0036392212,-0.013656616,0.014198303,0.010284424,-0.025268555,0.00737381,0.05404663,-0.0071372986,0.0072288513,0.006629944,-0.01637268,0.0024223328,0.016036987,0.0032539368,-0.0062789917,-0.00687027,-0.00831604,-0.009468079,0.013961792,-0.00064611435,0.0004892349,-0.017227173,-0.014961243,0.020828247,0.027053833,0.01461792,-0.031799316,-0.012321472,0.017105103,0.012382507,-0.015396118,-0.026184082,-0.03717041,-0.02796936,0.016784668,0.016418457,0.0058135986,0.003610611,-0.022064209,0.0025234222,0.031097412,0.019546509,0.0036735535,0.008422852,-0.0151901245,0.007926941,-0.013694763,-0.004169464,-0.0110321045,-0.018600464,0.013755798,0.025787354,-0.0007686615,-0.017715454,0.027618408,-0.006412506,0.018096924,-0.0043182373,-0.019744873,0.021026611,-0.018539429,-0.012382507,0.010536194,0.012748718,-0.011169434,-0.024658203,-0.021072388,0.016586304,0.03866577,-0.0079574585,-0.021652222,0.013542175,0.0050621033,0.025939941,0.028656006,0.008583069,0.042144775,0.024017334,-0.012275696,-0.011711121,0.0058021545,-0.024047852,-0.020599365,0.0062026978,-0.0069618225,-0.020355225,0.026794434,0.0059165955,-0.012786865,-0.01449585,-0.01499939,-0.0015487671,-0.017410278,0.026794434,-0.014671326,0.019073486,-0.023864746,-0.0047073364,0.000849247,-0.011802673,-0.046051025,-0.017074585,-0.009590149,-0.011734009,-0.047851562,-0.0007390976,-0.024902344,0.022979736,-0.030136108,-0.01763916,-0.0046310425,0.032073975,-0.025909424,0.014785767,-0.0040245056,0.03137207,0.0066947937,0.015686035,0.021896362,-0.014381409,-0.047790527,-0.014732361,-0.009094238,-0.022949219,0.005882263,-0.0034809113,0.045776367,0.003534317,-0.0072784424,0.0016498566,-0.0045814514,-0.013450623,-0.011566162,-0.027893066,-0.023742676,0.005504608,0.028930664,0.00018692017,-0.010749817,0.048339844,-0.017944336,-0.005138397,0.023284912,0.04989624,-0.00007545948,0.039733887,-0.012794495,-0.0057525635,-0.00074481964,0.005744934,-0.014312744,0.014122009,0.011871338,0.0051956177,0.00024318695,-0.014839172,0.013549805,-0.020401001,-0.008071899,0.012229919,-0.0036735535,-0.01701355,0.029464722,0.015205383,-0.0025539398,-0.022323608,-0.015548706,0.015220642,0.043792725,0.02796936,-0.0024662018,0.002073288,0.012268066,-0.015586853,-0.0042648315,-0.0023956299,-0.021865845,-0.031173706,-0.023849487,-0.032440186,0.022567749,0.007381439,0.03994751,0.0030708313,0.027618408,-0.016448975,-0.025039673,-0.01625061,0.03552246,0.0052223206,-0.01953125,-0.018295288,-0.006164551,0.014709473,-0.02192688,0.015808105,-0.03186035,-0.024749756,0.0068206787,-0.025054932,0.020492554,0.0070762634,0.0033855438,0.0043754578,-0.012878418,0.0016927719,0.012123108,0.0340271,-0.01184082,-0.0027828217,-0.0005517006,0.004295349,-0.02508545,0.012191772,0.0059776306,-0.013206482,0.02458191,-0.006374359,0.013656616,-0.011474609,0.026901245,0.007633209,-0.003168106,0.032226562,0.0077934265,0.016418457,-0.027313232,0.0044937134,0.016418457,0.008201599,0.029037476,-0.020309448,-0.017623901,0.013435364,-0.029800415,-0.051757812,0.0042266846,0.02998352,0.03765869,-0.02319336,0.030792236,-0.014442444,-0.010192871,0.012672424,0.007419586,-0.017364502,-0.020431519,0.05065918,-0.009689331,-0.00063323975,0.0061187744,-0.010818481,-0.018600464,-0.023361206,0.010734558,0.0025615692,-0.012992859,0.021209717,0.005542755,0.038024902,0.01675415,0.02204895,0.014823914,0.0061073303,0.01687622,0.014007568,0.039611816,-0.002319336,-0.010864258,0.008285522,0.008476257,-0.012001038,-0.003686905,-0.0026111603,0.00907135,-0.029846191,0.0289917,-0.0134887695,0.033843994,-0.026977539,0.015335083,-0.027557373,-0.029373169,-0.019165039,-0.0152282715,-0.034210205,0.009460449,0.05105591,0.0042800903,0.004272461,0.004119873,-0.029159546,0.04751587,0.052947998,-0.0032672882,-0.02003479,-0.0074691772,-0.0005674362,-0.00166893,-0.008743286,0.012687683,-0.022613525,-0.020690918,-0.0008111,-0.020599365,0.007926941,0.014533997,0.00019466877,0.001953125,-0.016571045,-0.007297516,0.030715942,-0.0048942566,0.011650085,0.0015115738,-0.0071144104,0.0335083,0.022583008,-0.0051078796,0.02708435,0.024658203,-0.03829956,0.05432129,-0.018875122,0.014305115,-0.016525269,0.008079529,-0.037902832,-0.010002136,-0.001912117,0.005268097],"createdAt":"2026-04-18T19:29:43.365Z","updatedAt":"2026-04-23T04:02:11.982Z","lastSeenAt":"2026-04-23T04:02:11.982Z","tsv":"'/api/v1/apikeys/91':43,142 '/request':11,24,126 '0.02':10,23,62,125 '000':50 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':77 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':55 '20':49 '6':67 'Base network API' 'USDC micropayment endpoint' 'accept':44 'access':3,16,34,136,163 'address':76 'advertis':82,151 'ai':94 'analysi':98 'analyt':88 'api':2,15,33,84,129,152,159 'appear':155 'base':8,21,51,58 'broader':79 'categori':85,153 'chain':74 'charg':48 'classif':101 'clear':145 'connect':173 'content':179 'convers':118 'data':87,91 'decim':68 'doc':167 'document':165 'embed':102 'endpoint':28,42,121,140,164,187 'equal':61 'estim':112 'exact':182 'exchang':107 'export':92 'feed':106 'financ':103 'function':183 'gas':111 'generat':119 'geocod':116 'howev':137 'includ':86 'infrastructur':114 'insight':93 'instant':135 'json-response' 'key':130,160 'learn':96 'limit':133 'list':123 'lowpaymentfee' 'lowpaymentfee.com':30,80 'machin':95 'map':146 'metric':89 'micropay':6,19 'multipl':83 'network':9,22,59 'on-chain':72 'page':166 'particular':186 'pay-per-request API' 'payment':38,69 'per':63 'per-request-micropayment' 'platform':81 'post':45 'post-method' 'premium':1,14,32 'premium API' 'price':105,168 'probe':141 'prompt':175 'protocol':39 'provid':31 'provis':161 'quot':110 'rate':108,132 'readm':169 'remain':188 'report':90 'request':46,64 'return':170 'sentiment':97 'settl':71 'specif':41,139 'substant':178 'summar':100 'text':99 'token':109 'unclear':189 'unit':52 'usdc':13,26,54,65 'usdc-base-network' 'use':66 'util':115 'valid':117 'via':4,17,35 'wallet':174 'web3':104 'x402':5,18,37 'x402 API' 'x402-payment'","prices":[{"id":"0ec2c46b-444b-4011-bd61-25e236b050f5","listingId":"7413d9ea-f37c-4ab8-9c54-8b8dfcf903c7","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/91","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:43.365Z"}],"sources":[{"listingId":"7413d9ea-f37c-4ab8-9c54-8b8dfcf903c7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/apikeys/91","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:43.365Z","lastSeenAt":"2026-04-23T04:02:11.982Z"}],"details":{"listingId":"7413d9ea-f37c-4ab8-9c54-8b8dfcf903c7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/apikeys/91 \\\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/apikeys/91"},{"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/apikeys/91"}],"useCases":["Programmatic access to premium API services with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API keys","On-chain settled API access for Web3-native applications"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents needing autonomous API consumption via x402","Users who prefer on-chain USDC payments over subscriptions"],"notFor":["Users who need detailed API documentation before purchasing","High-volume consumers who would benefit from bulk pricing","Users without Base network USDC wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.46Z"},"updatedAt":"2026-04-23T04:02:11.982Z"}}