{"id":"b3b6d99d-c0f5-424f-b8c0-1957b79e1f3c","shortId":"zw79Rv","kind":"x402","title":"Pay-per-call premium API endpoint on Base via x402, settled in USDC.","tagline":"Pay-per-call premium API endpoint on Base via x402, settled in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/endpoint-6`) is listed as \"Premium API Access\" and accepts USDC payments on Base. The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (i.e., $0.02 per request, since USDC uses 6 decimals). Payment is made inline via the X-PAYMENT header with no API keys or rate limits required.\n\nThe broader lowpaymentfee.com platform advertises endpoints across several categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request. However, this particular endpoint (`/api/endpoint-6`) does not map to any of the named endpoints on the site, so its exact functionality is unclear.\n\nThe endpoint accepts POST requests and returns `application/json`. Settlement occurs on the Base L2 network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. No OpenAPI schema, detailed documentation, or example payloads were found during the crawl — the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The endpoint path /api/endpoint-6 does not correspond to any named endpoint on the site; its actual functionality is unknown.","No OpenAPI schema, request/response examples, or meaningful documentation is available.","Docs, pricing, and API pages returned only 'Connect wallet' with no further content.","Cannot verify what data or service this endpoint actually provides."],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-6","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-6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the specific function of /api/endpoint-6 is unknown. The crawled docs/pricing/API pages returned only 'Connect wallet' with no useful 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":"2026-04-18T23:36:11.663Z","embedding":[-0.015098572,-0.040130615,0.051757812,0.016937256,0.007621765,-0.02519226,-0.024993896,0.037139893,0.076660156,-0.08306885,0.01727295,-0.04650879,-0.035491943,-0.049835205,-0.028121948,0.010406494,0.0020065308,-0.0026016235,-0.051605225,0.019439697,0.018478394,-0.035583496,-0.0019273758,0.034454346,0.00049209595,-0.020004272,-0.016571045,-0.011268616,-0.0143585205,-0.035125732,0.045410156,-0.02217102,-0.0004646778,0.008308411,-0.031921387,-0.014457703,0.003490448,0.036224365,0.030303955,-0.018936157,-0.01902771,-0.057006836,0.0068206787,-0.011459351,-0.059631348,-0.00945282,0.02116394,-0.023483276,0.009628296,0.009361267,-0.033355713,-0.0045051575,0.0027122498,-0.0019159317,-0.0010900497,0.012939453,0.008148193,-0.004245758,0.015007019,0.019866943,-0.000107347965,-0.076049805,-0.009307861,-0.0077667236,0.0030899048,0.05102539,-0.025772095,0.046173096,0.015640259,0.064941406,0.035125732,0.05706787,0.02355957,0.0143585205,0.007972717,0.0028018951,0.02607727,0.050048828,-0.017349243,-0.029586792,-0.018234253,-0.0121536255,-0.049194336,-0.007209778,-0.012557983,-0.04763794,-0.015304565,0.008285522,-0.033996582,0.034973145,-0.06774902,-0.009216309,-0.010055542,0.0037937164,0.008293152,-0.011123657,-0.020126343,0.011932373,-0.0027275085,0.02571106,0.017288208,-0.030914307,0.014930725,0.005748749,0.04296875,0.04425049,0.026504517,0.027328491,0.019317627,-0.0066337585,-0.031341553,0.021347046,0.00053167343,-0.017349243,0.007183075,0.0053520203,-0.020355225,0.025756836,-0.015487671,0.021118164,-0.042053223,0.055786133,0.00819397,-0.009208679,0.022903442,-0.039764404,-0.0056610107,0.014907837,-0.028427124,-0.0048217773,0.014808655,0.0074920654,0.026306152,-0.014251709,-0.030761719,0.013885498,-0.021484375,-0.023040771,-0.051483154,-0.038330078,0.03213501,-0.022766113,0.02319336,0.03579712,-0.093566895,-0.00141716,-0.045959473,0.00013363361,-0.027389526,0.0034828186,-0.0013685226,0.01651001,-0.020843506,-0.0009174347,-0.029556274,-0.02861023,0.0011301041,0.02607727,-0.026504517,0.05441284,-0.0042266846,0.042388916,0.043273926,0.016555786,0.039123535,0.036102295,-0.0016727448,-0.06518555,-0.087646484,-0.027297974,0.0066719055,-0.019699097,-0.034332275,0.01902771,-0.019256592,-0.0680542,-0.02180481,0.0009627342,-0.005672455,-0.04055786,0.0035438538,-0.03677368,0.0061149597,-0.01222229,-0.06829834,-0.027145386,-0.033081055,0.079833984,0.03286743,0.02444458,0.044525146,-0.011985779,0.059387207,0.017028809,-0.017440796,-0.027145386,0.023666382,-0.016357422,0.019104004,-0.0026378632,0.0049057007,-0.030166626,0.031021118,0.072143555,0.020980835,-0.0069847107,-0.021530151,-0.05065918,-0.028045654,-0.0368042,0.0129776,0.015640259,0.0065689087,0.042022705,-0.0289917,-0.032104492,0.0001052618,0.008590698,0.009979248,0.06866455,0.022247314,0.0008292198,0.02029419,0.020889282,-0.048065186,0.03540039,0.023010254,0.012313843,-0.033355713,-0.025024414,0.020385742,0.034179688,-0.023468018,0.00774765,-0.020751953,0.035949707,-0.0209198,0.008392334,0.026123047,-0.000078082085,-0.027618408,-0.03704834,-0.021362305,0.023208618,0.0009756088,-0.020568848,-0.028945923,-0.07531738,0.036956787,0.034423828,0.037963867,-0.016555786,0.023132324,-0.021408081,-0.005809784,-0.06329346,0.05886841,0.057281494,-0.025726318,-0.008361816,0.01109314,-0.004173279,-0.030273438,-0.009742737,-0.018356323,-0.04638672,-0.02406311,0.002532959,-0.04135132,0.017181396,0.0025749207,0.02268982,0.04434204,-0.005039215,-0.052764893,-0.02482605,-0.01235199,0.006668091,-0.028640747,-0.022994995,-0.012832642,0.007663727,0.029510498,-0.0015525818,0.017593384,-0.0027656555,-0.009757996,-0.003622055,0.013496399,-0.015533447,-0.034210205,0.022613525,-0.019927979,-0.07116699,0.004749298,-0.008987427,0.06210327,-0.057678223,0.034362793,-0.016662598,0.009963989,0.070739746,-0.024917603,-0.062194824,0.011138916,0.02355957,0.020446777,0.029449463,0.008293152,-0.026504517,-0.019256592,0.049194336,-0.020858765,-0.013015747,0.013374329,0.014205933,0.026107788,0.007331848,-0.07128906,-0.026428223,-0.012931824,-0.017944336,0.018859863,-0.013420105,0.025253296,-0.012542725,0.0044441223,-0.030975342,-0.016662598,-0.023651123,0.028335571,-0.023956299,0.002363205,-0.011253357,-0.003200531,0.01939392,0.025848389,-0.017547607,0.0019083023,0.05493164,0.01689148,-0.0134887695,-0.02130127,-0.02192688,-0.019546509,0.0054016113,0.015174866,0.022994995,0.02281189,0.045532227,-0.038085938,0.020965576,0.022232056,0.014961243,0.034240723,-0.015602112,0.0105896,-0.08483887,-0.053894043,-0.027252197,-0.036834717,0.037719727,0.01928711,0.008560181,0.048858643,0.008621216,-0.026504517,-0.04043579,0.023284912,-0.041748047,0.0017213821,0.046173096,-0.00712204,-0.0070266724,-0.00072288513,0.006324768,0.014434814,0.041015625,0.008575439,0.02319336,0.074279785,0.046142578,0.004131317,0.012489319,-0.0005145073,0.03274536,0.0036334991,-0.015098572,-0.015975952,-0.004627228,0.022338867,-0.0131073,-0.019851685,-0.07330322,0.062194824,0.041046143,0.07763672,0.016784668,0.009414673,0.036956787,-0.015457153,0.006729126,-0.025680542,-0.021224976,-0.022659302,-0.04534912,0.030639648,-0.019729614,0.0017175674,-0.010940552,0.019973755,-0.010398865,0.016494751,-0.043273926,0.045684814,0.016540527,-0.0039138794,0.007858276,0.0055732727,0.048553467,0.050445557,-0.040252686,0.028656006,0.014755249,-0.0385437,0.008110046,0.035003662,-0.017227173,-0.005088806,-0.048828125,-0.023254395,0.006652832,0.0126571655,-0.052978516,-0.015609741,0.0025119781,0.013244629,0.028198242,-0.031066895,-0.023620605,-0.027404785,-0.007408142,-0.048675537,-0.011444092,-0.035308838,0.0068588257,0.04776001,-0.018234253,-0.001200676,0.010276794,0.0077171326,-0.015533447,0.016998291,0.022476196,-0.009284973,-0.034088135,0.032928467,0.011451721,0.026489258,-0.0038452148,0.034820557,0.024429321,0.037963867,0.04043579,0.02015686,-0.013038635,-0.066467285,0.017181396,-0.057678223,0.0041160583,0.027893066,-0.015510559,-0.005847931,-0.014587402,-0.027130127,-0.037475586,0.00831604,-0.03149414,0.0129776,0.019958496,-0.032440186,-0.044403076,-0.06213379,-0.016143799,0.0064888,0.05697632,0.027709961,0.013412476,-0.05593872,-0.005382538,0.031982422,0.004081726,0.025604248,-0.014175415,-0.020904541,-0.031143188,-0.033721924,-0.012840271,-0.012802124,0.022460938,0.0007071495,-0.026947021,0.032592773,-0.0056648254,0.023956299,-0.0042533875,0.0075950623,0.037628174,-0.03149414,-0.0077667236,0.004589081,0.05496216,0.0076026917,-0.027694702,-0.04534912,0.042663574,0.010620117,0.035064697,-0.03756714,-0.001660347,-0.0022945404,0.015151978,0.008987427,-0.021865845,-0.011955261,-0.004760742,-0.052093506,-0.0703125,0.032928467,-0.008491516,0.034088135,0.011581421,-0.0046844482,0.018661499,0.0035247803,0.006980896,0.02519226,-0.031799316,-0.0104522705,-0.034179688,-0.03805542,-0.01574707,-0.0013198853,0.0007786751,0.022964478,-0.020599365,0.017944336,0.0075302124,-0.024459839,0.024917603,0.009544373,0.010620117,0.018295288,0.0016288757,0.019042969,0.043121338,0.014472961,-0.036010742,0.014266968,0.0044288635,0.005554199,-0.011459351,0.049041748,0.029769897,-0.019348145,-0.0115737915,-0.010856628,-0.0017404556,-0.01940918,0.005882263,-0.0076026917,0.021881104,-0.012420654,-0.044830322,0.025024414,0.013267517,-0.026611328,-0.025482178,0.028686523,0.011161804,-0.037902832,0.017333984,0.02935791,0.057739258,-0.028121948,-0.01109314,0.0055885315,0.039093018,0.028182983,0.020828247,-0.014472961,0.021057129,-0.0124435425,0.020401001,0.010734558,-0.010543823,0.012466431,0.0073394775,0.028045654,0.022277832,0.004081726,-0.018753052,-0.027694702,0.00390625,-0.012413025,-0.020858765,0.032196045,0.025894165,0.024795532,-0.013282776,0.018493652,0.0061302185,-0.0037498474,-0.020965576,-0.0008749962,0.026260376,-0.022003174,-0.026824951,0.01436615,0.0025634766,0.034698486,-0.0579834,-0.007003784,0.011451721,0.016082764,-0.043273926,-0.035125732,-0.036712646,-0.0036888123,0.033081055,0.0046539307,0.019012451,0.026504517,-0.008071899,-0.0014925003,0.00856781,0.00907135,-0.005718231,-0.028915405,-0.048461914,-0.003955841,0.00058460236,-0.0041122437,-0.038024902,0.0056419373,-0.0088272095,-0.018173218,0.011741638,-0.010437012,-0.0055236816,-0.012649536,0.008888245,0.029632568,0.006729126,0.010269165,-0.022094727,-0.024642944,0.0045204163,0.012245178,0.022003174,-0.055786133,0.019042969,-0.014701843,0.005504608,-0.0032157898,0.019897461,0.03164673,0.032928467,-0.0008845329,0.020217896,-0.0413208,0.029144287,-0.02897644,0.008712769,0.017028809,-0.040405273,-0.0027313232,-0.020935059,-0.0048675537,0.035583496,-0.017578125,-0.014961243,-0.028945923,-0.0385437,-0.019241333,-0.048675537,0.009223938,0.027664185,0.037231445,-0.032043457,0.0064468384,-0.0178833,-0.0043411255,-0.022857666,0.0036468506,-0.011360168,0.01159668,0.022644043,0.008865356,-0.02999878,-0.030807495,-0.026062012,-0.014022827,-0.035339355,-0.048828125,-0.026016235,0.0061416626,-0.006877899,-0.00724411,-0.032440186,-0.0109939575,-0.013305664,-0.04650879,0.011993408,0.007068634,0.022872925,0.013473511,-0.01374054,0.008796692,0.0088272095,-0.01940918,0.036987305,0.02166748,0.00573349,-0.04510498,0.006401062,0.019577026,0.021453857,-0.0006737709,-0.012619019,-0.003835678,-0.01725769,-0.048217773,-0.0067863464,-0.007369995,-0.0022029877,-0.013832092,-0.006385803,-0.05429077,0.0039520264,-0.018692017,0.0042533875,0.022460938,0.020217896,0.02168274,0.00023829937,0.016677856,-0.006149292,-0.025161743,-0.03414917,0.03778076,0.00970459,0.0010595322,0.0236969,0.044189453,0.013694763,-0.009231567,0.01007843,0.01234436,0.0038776398,-0.019577026,0.012893677,-0.007965088,0.004432678,-0.014007568,-0.014472961,-0.033935547,0.0022830963,0.08392334,-0.0056495667,-0.0129776,-0.017364502,-0.018447876,0.024871826,0.023101807,-0.04296875,-0.010597229,-0.026306152,0.0054473877,-0.02230835,0.022094727,0.006439209,0.03665161,-0.015136719,-0.05154419,-0.0008158684,-0.0031147003,-0.011917114,-0.06640625,-0.019561768,-0.06591797,0.007045746,0.0018491745,-0.020523071,0.01096344,0.005542755,-0.009384155,-0.08074951,0.0095825195,0.042663574,0.010467529,0.020690918,-0.01449585,0.02104187,0.014251709,-0.032104492,-0.026046753,0.02986145,-0.028015137,-0.004802704,-0.03466797,0.022781372,-0.013168335,-0.019500732,0.026916504,-0.0054512024,0.016708374,-0.014961243,0.010147095,-0.015213013,0.0060310364,-0.008308411,0.036102295,-0.011428833,-0.021911621,0.035858154,-0.038146973,0.024383545,0.025634766,0.005607605,0.0077667236,0.033477783,0.030761719,-0.04586792,0.0018615723,0.023483276,0.018295288,0.050933838,-0.025634766,0.019424438,0.015533447,-0.0022354126,0.015731812,-0.016738892,-0.019439697,-0.042175293,-0.013717651,0.019348145,-0.0066223145,0.012962341,-0.022857666,0.01864624,0.020431519,0.0020809174,0.012687683,-0.007549286,-0.023849487,-0.020614624,0.0061836243,-0.005870819,0.0007042885,-0.008926392,0.028381348,0.0151901245,0.037902832,0.010253906,-0.020065308,0.005722046,0.019134521,-0.009498596,0.012992859,0.029434204,-0.0009422302,0.00894165,0.014923096,0.017089844,-0.03753662,-0.014884949,-0.017486572,-0.009407043,0.005077362,-0.012329102,-0.024291992,0.0058403015,-0.004371643,0.0022697449,-0.027862549,0.01701355,-0.02658081,-0.02909851,-0.007888794,-0.017181396,0.02230835,0.011047363,0.003358841,0.010902405,-0.0020885468,0.04562378,0.008041382,-0.01802063,0.033691406,0.029449463,0.015602112,-0.017456055,0.0020999908,-0.010818481,0.0002309084,-0.0027656555,-0.033111572,0.008430481,0.033477783,-0.020111084,0.011619568,0.00066185,0.030197144,0.00077819824,0.01751709,-0.0012197495,0.018447876,-0.011627197,0.04031372,-0.04373169,0.01687622,0.017288208,0.002943039,-0.0121536255,-0.011451721,-0.03466797,0.016036987,0.0009622574,-0.002538681,0.049835205,-0.008132935,0.015609741,-0.026229858,-0.010429382,0.011421204,-0.030715942,-0.020202637,0.033233643,-0.0015716553,-0.00083875656,0.018051147,-0.027557373,0.025314331,-0.03161621,0.02281189,-0.008590698,0.00598526,-0.014701843,-0.023880005,-0.016799927,-0.012756348,-0.008743286,-0.003189087,0.00082302094,0.034210205,0.009628296,0.023757935,0.038757324,0.01222229,0.0075302124,-0.03878784,-0.031951904,0.002149582,-0.01626587,0.02470398,-0.026275635,0.0418396,0.055114746,-0.0013828278,0.033233643,0.0340271,0.037200928,0.013458252,0.004257202,-0.0070877075,0.0041542053,-0.016799927,0.018173218,0.00945282,0.045562744,-0.029281616,0.0335083,0.024932861,0.027938843,-0.024551392,0.038909912,0.06976318,0.014381409,-0.008895874,0.040252686,-0.0034618378,-0.010169983,-0.005630493,-0.018066406,0.054870605,0.017654419,0.04437256,0.047088623,0.007106781,-0.0073051453,0.018844604,-0.022613525,-0.03277588,0.05987549,0.024093628,-0.017623901,-0.011306763,-0.018325806,-0.0015354156,-0.05203247,-0.031829834,0.018814087,-0.014640808,0.0131073,-0.011108398,0.009643555,-0.010444641,0.021331787,0.0259552,0.019729614,-0.020233154,0.037322998,0.032928467,-0.0014753342,0.028579712,0.005569458,0.02494812,-0.019226074,-0.017745972,0.01083374,0.015777588,-0.0036029816,-0.01977539,0.010139465,0.013137817,0.05911255,0.0463562,-0.013343811,0.014282227,0.037261963,0.009109497,-0.013153076,0.04446411,0.029067993,0.018600464,0.04711914,0.032318115,0.026504517,-0.029144287,0.01361084,-0.0012578964,-0.0006041527,-0.0058288574,-0.0015125275,0.0078048706,-0.016296387,0.027893066,-0.001786232,-0.015419006,0.015037537,0.037078857,-0.003030777,-0.0022773743,-0.008255005,0.009376526,-0.025726318,-0.0029087067,0.03375244,-0.015701294,0.028656006,0.016494751,0.03933716,-0.025497437,0.03842163,-0.008087158,-0.017700195,-0.0048561096,0.031173706,-0.028793335,0.011856079,0.0008068085,0.0007920265,-0.050079346,0.027633667,0.030883789,-0.022354126,0.023757935,0.00094795227,0.0005545616,0.014099121,0.031280518,0.001329422,0.000056922436,-0.0072746277,-0.019927979,0.038726807,0.042175293,0.0082092285,0.01235199,-0.015266418,-0.0070648193,-0.004940033,0.0066719055,-0.016693115,-0.017150879,-0.018188477,-0.045532227,0.016281128,0.032806396,0.018585205,0.039093018,-0.001572609,-0.016143799,0.011222839,0.022476196,0.005340576,-0.01285553,-0.017654419,0.022644043,-0.019515991,0.053955078,0.04373169,0.0026721954,0.030731201,-0.020736694,-0.027297974,-0.008094788,-0.00013124943,0.0131073,-0.011734009,0.00894165,-0.0038585663,0.030380249,-0.035095215,-0.0473938,0.009353638,-0.014831543,-0.015670776,-0.031982422,0.0043525696,0.013076782,0.037719727,0.040374756,0.009307861,-0.03277588,0.06262207,-0.016143799,0.044891357,-0.009338379,-0.006832123,0.03753662,0.036010742,0.04171753,0.017822266,0.025894165,-0.035949707,0.018936157,0.04425049,0.015701294,0.022888184,-0.0034866333,-0.013511658,0.039215088,0.0009822845,0.024627686,-0.015533447,-0.009361267,0.022735596,-0.0042152405,-0.01133728,0.0034675598,-0.004016876,0.011482239,0.033355713,-0.026412964,-0.004699707,-0.017410278,-0.013420105,0.03942871,0.008743286,0.001865387,-0.011688232,-0.025741577,0.016830444,-0.028533936,-0.023239136,0.0031661987,0.020523071,-0.04058838,-0.015701294,0.010002136,0.011909485,-0.011695862,0.02947998,0.036987305,0.002008438,0.0066070557,0.049926758,-0.0104904175,0.04373169,-0.013061523,0.016784668,0.030883789,-0.0037822723,-0.021316528,0.01285553,0.014381409,-0.022033691,0.019561768,0.0435791,-0.014472961,0.009155273,0.001660347,-0.013648987,0.008735657,-0.0056915283,-0.014251709,-0.002708435,-0.015098572,-0.017715454,0.0011339188,0.0075302124,-0.002380371,-0.0017366409,-0.0038108826,-0.011779785,0.021484375,0.035461426,0.02571106,-0.047912598,0.0023174286,0.005771637,0.011489868,-0.021591187,-0.017333984,-0.001701355,-0.023330688,0.018920898,0.009529114,0.005016327,0.021148682,-0.026489258,0.00004184246,0.01977539,0.012794495,0.02168274,0.006729126,-0.0075683594,0.018600464,-0.016067505,-0.00459671,-0.009666443,-0.0014820099,0.011367798,0.011833191,-0.01210022,-0.022216797,0.035949707,-0.0065841675,0.022949219,0.009109497,-0.012397766,0.028717041,-0.022445679,-0.004016876,-0.0020484924,0.019561768,-0.009521484,-0.014701843,-0.008956909,0.014266968,0.056854248,-0.017410278,-0.006801605,0.019577026,0.013343811,0.01701355,0.02720642,0.0124435425,0.034851074,0.030883789,-0.01828003,-0.01675415,0.009475708,-0.0048942566,-0.024353027,0.0181427,-0.016540527,-0.018753052,0.016464233,0.004135132,0.0025405884,-0.024032593,-0.021362305,-0.008430481,-0.02168274,0.0064735413,-0.011909485,0.008308411,-0.020736694,-0.0054855347,-0.0068244934,-0.023254395,-0.03387451,-0.021743774,-0.00687027,-0.007633209,-0.054656982,0.01776123,-0.03378296,0.015586853,-0.022598267,-0.0053596497,-0.0077934265,0.029815674,-0.008323669,-0.0064811707,0.0007572174,0.019439697,0.01612854,0.01889038,0.026260376,-0.01940918,-0.033355713,-0.018371582,-0.003873825,-0.014343262,0.02229309,0.00045585632,0.032562256,0.017730713,-0.0020103455,0.007659912,-0.010543823,-0.014816284,-0.00083875656,-0.021469116,-0.019058228,0.018585205,0.0064048767,-0.005973816,-0.008674622,0.040863037,-0.019256592,-0.018051147,0.03515625,0.04449463,-0.00009268522,0.034240723,-0.006576538,-0.0058021545,0.0012731552,0.0030517578,-0.015823364,0.014060974,0.012168884,0.0071907043,-0.012275696,0.01210022,0.029220581,-0.008216858,-0.00579834,0.023376465,-0.0016727448,-0.009811401,0.032989502,0.004562378,0.0074539185,-0.016220093,-0.01424408,0.01777649,0.041534424,0.018295288,0.008239746,-0.0048103333,0.002368927,-0.017608643,0.007633209,0.027633667,-0.010955811,-0.033416748,-0.008110046,-0.028579712,0.016662598,0.002073288,0.014343262,-0.0055389404,0.014564514,-0.023391724,-0.03387451,-0.01222229,0.027816772,0.028656006,-0.007286072,-0.022842407,-0.0031433105,0.013458252,-0.027816772,0.0059165955,-0.034942627,-0.03189087,-0.00078868866,-0.01713562,0.001452446,0.008804321,-0.00919342,0.0024986267,-0.009140015,-0.0034255981,-0.00057935715,0.02607727,-0.014663696,0.0026130676,0.024520874,0.0064315796,-0.023483276,0.027023315,-0.017852783,-0.0019083023,0.02507019,-0.008880615,0.007827759,-0.016311646,0.044189453,0.00058078766,-0.011650085,0.028717041,-0.0093307495,0.015914917,-0.03503418,0.012779236,0.0027446747,0.0010089874,0.029846191,-0.032409668,-0.030578613,0.0030708313,-0.016448975,-0.039978027,0.00006848574,0.02331543,0.04385376,-0.023147583,0.038970947,-0.007663727,-0.019073486,0.009307861,0.0146102905,-0.01689148,0.0009188652,0.030975342,0.0041007996,-0.009773254,-0.0029392242,-0.007183075,-0.031143188,-0.010353088,0.006706238,-0.0016565323,-0.006793976,0.018218994,0.0048065186,0.044555664,-0.0029506683,0.024246216,0.013435364,0.017105103,0.018478394,0.0063667297,0.030914307,0.0028514862,-0.0256958,0.009346008,0.0027332306,-0.014328003,-0.017364502,-0.010002136,-0.0067100525,-0.03842163,0.016357422,-0.0039253235,0.027893066,-0.0095825195,0.0018072128,-0.022766113,-0.0028266907,-0.039093018,-0.015113831,-0.017990112,0.0096588135,0.03982544,-0.011566162,0.023162842,0.010307312,-0.017837524,0.018447876,0.0340271,-0.0020713806,-0.029174805,-0.016525269,0.012336731,0.0039711,0.0009355545,0.0011730194,-0.016937256,-0.012687683,-0.0017576218,-0.00970459,0.012886047,-0.008003235,0.015060425,0.0070114136,-0.0033550262,-0.005580902,0.04095459,-0.011688232,-0.004421234,0.007827759,0.013374329,0.036193848,0.037322998,-0.013450623,0.013450623,0.022750854,-0.043182373,0.055633545,-0.0035705566,0.021408081,-0.011405945,-0.005809784,-0.039154053,-0.02178955,-0.0154953,-0.007144928],"createdAt":"2026-04-18T18:38:01.904Z","updatedAt":"2026-04-22T21:30:34.336Z","lastSeenAt":"2026-04-22T21:30:34.336Z","tsv":"'/api/endpoint-6':53,165 '0.02':86,158 '000':80 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':201 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':207 '20':79 '6':92 'Base network API' 'USDC micropayment endpoint' 'accept':61,186 'access':40,59 'across':118 'address':200 'advertis':116 'ai':128 'analysi':132 'analyt':122 'api':6,20,38,58,106,225 'application/json':191 'base':9,23,48,65,81,196 'base-network' 'broader':113 'call':4,18 'categori':120 'challeng':68 'classif':135 'collect':32 'confirm':69 'connect':231 'content':237 'contract':205 'convers':151 'crawl':220 'crypto-paid API' 'data':121,125 'decim':93 'detail':211 'doc':222 'document':212 'embed':136 'endpoint':7,21,39,52,71,117,154,164,174,185 'estim':146 'exact':180 'exampl':214 'exchang':141 'export':126 'feed':140 'financ':137 'found':217 'function':181 'gas':145 'generat':152 'geocod':149 'header':103 'host':30 'howev':161 'i.e':85 'infrastructur':148 'inlin':97 'insight':127 'json-response' 'key':107 'l2':197 'learn':130 'limit':110 'list':55 'live':73 'lowpaymentfee' 'lowpaymentfee.com':29,114 'machin':129 'made':96 'map':168 'maximum':77 'metric':123 'name':173 'network':49,198 'no-api-key' 'occur':193 'openapi':209 'page':226 'particular':163 'pay':2,16,35 'pay-per-cal':1,15 'pay-per-call API' 'pay-per-request':34 'payload':215 'payment':44,63,94,102 'per':3,17,36,87,159 'platform':115 'post':187 'post-method' 'premium':5,19,57 'premium API access' 'price':139,156,223 'prompt':233 'protocol':45 'quot':144 'rate':109,142 'report':124 'request':37,88,160,188 'requir':75,111 'return':190,228 'schema':210 'sentiment':131 'settl':12,26 'settlement':192 'sever':119 'sinc':89 'site':177 'specif':51 'summar':134 'text':133 'token':143 'unclear':183 'unit':82 'usdc':14,28,62,84,90,204 'usdc-settlement' 'use':91,202 'valid':150 'via':10,24,41,98 'wallet':232 'web3':138 'x':101 'x-payment':100 'x402':11,25,43,67 'x402 API' 'x402-payment'","prices":[{"id":"6f8d70db-5237-4e94-8c85-93d62add400d","listingId":"b3b6d99d-c0f5-424f-b8c0-1957b79e1f3c","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-6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:01.904Z"}],"sources":[{"listingId":"b3b6d99d-c0f5-424f-b8c0-1957b79e1f3c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-6","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:01.904Z","lastSeenAt":"2026-04-22T21:30:34.336Z"}],"details":{"listingId":"b3b6d99d-c0f5-424f-b8c0-1957b79e1f3c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-6 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/endpoint-6"},{"claim":"All endpoints on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/endpoint-6"},{"claim":"The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with inline USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API calls on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment flows","AI agents that can settle USDC on Base for per-call API access","Users who want no-signup, no-API-key access to paid endpoints"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","Use cases requiring known, well-documented endpoint behavior (this endpoint's function is unspecified)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.214Z"},"updatedAt":"2026-04-22T21:30:34.336Z"}}