{"id":"360d6491-9336-4829-bbc6-7721e57f54c1","shortId":"gwGQhq","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402 protocol API platform that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/carts/69` is listed as \"Premium API Access\" and accepts POST requests with payment via the x402 exact scheme. The maximum amount required is 20,000 base units of USDC (0x8335…), which equals $0.02 per request given USDC's 6 decimal places.\n\nThe broader platform advertises four categories of APIs: 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 per request with no API keys, no rate limits, and no minimum commitments.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The specific functionality of the `/api/v1/carts/69` endpoint is unclear from the available material; the name \"Premium API Access\" and the path segment \"carts/69\" do not map to any of the documented API categories.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-apis"],"categories":["llm","finance","geo","infrastructure"],"synonyms":["low payment fee","micropayment API","x402 API","pay-per-request API","USDC API","Base network API","cheap API access"],"warnings":["No OpenAPI spec or schema documentation available for any endpoint","The /docs, /pricing, /api, and /README pages contain no useful content beyond 'Connect wallet'","The specific endpoint /api/v1/carts/69 does not correspond to any of the documented API categories on the landing page — its actual functionality is unknown","No request body schema or response format is documented anywhere","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/carts/69","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/carts/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/carts/69 is unclear. The docs, pricing, and README pages are all empty beyond a wallet connect prompt.","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":"2026-04-18T22:38:35.736Z","embedding":[-0.039916992,-0.02722168,0.016845703,0.019760132,0.024337769,-0.019561768,-0.044281006,0.03060913,0.06188965,-0.0770874,0.032287598,-0.058563232,-0.033691406,-0.02319336,-0.015541077,0.0007252693,-0.0064735413,0.0034294128,-0.052764893,0.05758667,0.04360962,-0.012550354,-0.018112183,0.02848816,-0.011253357,-0.01625061,0.024215698,0.00844574,-0.008018494,-0.039794922,0.020721436,-0.029724121,-0.009857178,0.013458252,-0.008323669,-0.014533997,0.004421234,0.035736084,0.032043457,-0.003622055,-0.0026779175,-0.051940918,0.016540527,-0.020050049,-0.042388916,-0.017684937,0.022872925,-0.036590576,-0.025360107,0.00018072128,-0.031982422,-0.020370483,-0.020553589,0.012260437,0.0000975132,0.009216309,-0.013137817,-0.016479492,0.019683838,0.0104522705,-0.015129089,-0.050048828,-0.008178711,-0.003479004,0.011260986,0.060455322,-0.006374359,0.03555298,0.008918762,0.080078125,0.034851074,0.026046753,0.033172607,-0.0041770935,0.00907135,-0.013801575,-0.021011353,0.07348633,-0.022949219,-0.005302429,-0.013679504,0.004508972,-0.059906006,-0.03326416,-0.022827148,-0.07897949,-0.0044822693,0.025863647,-0.034088135,0.033172607,-0.07733154,-0.017059326,-0.021560669,0.01007843,0.0034770966,0.0063552856,-0.015609741,0.012466431,0.009483337,0.009117126,0.0016326904,-0.053985596,0.017440796,0.013908386,0.06323242,0.030303955,0.008407593,0.01902771,-0.00004118681,-0.023071289,-0.028793335,-0.002450943,-0.027328491,0.008705139,0.02368164,0.012619019,-0.020202637,0.025878906,-0.027328491,0.024459839,-0.058898926,0.045776367,0.028900146,-0.01285553,-0.006137848,-0.054382324,-0.0287323,0.00023698807,-0.03363037,-0.016708374,0.026443481,0.0022087097,0.039398193,-0.032806396,-0.027999878,-0.0035877228,-0.0072364807,-0.024383545,-0.050445557,-0.0031013489,0.05050659,-0.04360962,0.027618408,0.019363403,-0.089782715,0.0003809929,-0.044189453,0.022918701,-0.037750244,0.0011739731,0.001332283,0.022094727,-0.012886047,-0.039978027,-0.016860962,-0.021743774,-0.025619507,0.037628174,-0.012916565,0.032989502,-0.028533936,0.013877869,-0.0028800964,0.005317688,0.0051879883,0.032836914,-0.024627686,-0.087402344,-0.08660889,-0.03668213,-0.016860962,-0.01890564,-0.027755737,-0.014846802,-0.002374649,-0.07647705,-0.03768921,-0.027557373,0.0037269592,-0.034820557,-0.013206482,-0.0211792,0.006526947,-0.012161255,-0.054656982,-0.016738892,-0.015472412,0.051330566,0.013069153,0.01586914,0.015167236,0.00035619736,0.067871094,0.029556274,-0.008049011,-0.02784729,0.00009393692,-0.018844604,0.051513672,0.0027694702,0.0019168854,-0.025146484,0.048095703,0.06585693,-0.005428314,-0.023040771,0.00021803379,-0.035308838,-0.03353882,-0.026550293,0.001294136,-0.001033783,-0.033599854,0.046844482,-0.034942627,-0.046173096,-0.005405426,0.016143799,0.018554688,0.0736084,0.008705139,0.020187378,-0.00077676773,0.015853882,-0.040618896,0.05050659,0.03616333,0.0044136047,-0.017532349,-0.02456665,0.03564453,0.056518555,-0.036376953,0.0064888,-0.02508545,0.025619507,0.007411957,-0.0061302185,0.03074646,-0.020019531,-0.020187378,-0.034332275,-0.018875122,0.021011353,-0.002653122,-0.03173828,-0.041229248,-0.09313965,0.035339355,0.029312134,0.036743164,0.015281677,-0.011405945,-0.012359619,-0.0037651062,-0.06640625,0.04537964,0.074157715,-0.0035629272,-0.011795044,0.02557373,0.002729416,-0.022766113,-0.0069885254,0.014465332,-0.012001038,-0.032348633,0.017181396,-0.047912598,-0.0009918213,0.021728516,0.037200928,0.05343628,-0.011520386,-0.041656494,-0.022277832,0.0025043488,-0.013839722,-0.035705566,-0.0061912537,-0.0054473877,0.0067214966,0.046081543,0.016143799,0.027313232,-0.0029773712,0.034362793,0.008262634,-0.009590149,-0.026519775,-0.022949219,0.021820068,0.014572144,-0.07507324,0.020584106,-0.0064926147,0.074279785,-0.04776001,0.024337769,-0.03074646,0.03768921,0.04534912,-0.015281677,-0.027328491,0.00025749207,0.029418945,0.031219482,0.025405884,0.0039138794,0.007472992,-0.020309448,0.049865723,-0.008972168,0.0045318604,-0.013999939,0.02961731,0.030914307,-0.0018167496,-0.033935547,-0.032958984,-0.015235901,-0.05331421,0.022201538,-0.03338623,0.04269409,-0.018707275,0.005382538,-0.022216797,0.0032253265,-0.044799805,0.00894165,-0.014167786,0.0127334595,-0.009109497,-0.036621094,0.011024475,0.026657104,-0.0317688,0.004486084,0.036346436,0.030914307,-0.020614624,-0.04071045,-0.022994995,-0.012481689,-0.0028972626,0.015419006,0.024337769,0.024719238,0.04019165,-0.04296875,-0.011566162,0.017410278,0.009857178,0.026977539,-0.0027389526,-0.004512787,-0.048034668,-0.042633057,-0.02243042,-0.0231781,0.02015686,0.020095825,-0.007926941,0.052978516,0.004966736,-0.016647339,-0.04940796,0.01033783,-0.0418396,0.012466431,0.033721924,-0.01826477,-0.06237793,0.0090789795,0.012214661,0.0021743774,0.044647217,0.01537323,0.0028743744,0.07849121,0.009414673,0.014823914,0.035064697,0.02406311,0.03137207,0.015510559,-0.0076408386,-0.031402588,-0.0069770813,0.015609741,-0.047210693,-0.023208618,-0.06945801,0.038635254,0.033203125,0.07788086,0.0047187805,0.0042762756,0.025543213,-0.008850098,0.011207581,-0.027954102,-0.008804321,-0.037109375,-0.028762817,0.024337769,-0.0040397644,-0.013130188,-0.03012085,0.04336548,-0.015655518,0.02558899,-0.026535034,0.04953003,-0.01751709,0.004032135,0.0017747879,0.00093221664,0.04852295,0.050323486,-0.044921875,0.008575439,0.019897461,-0.027755737,0.0050621033,0.042755127,-0.011009216,-0.028793335,-0.061340332,-0.024490356,-0.02293396,-0.023086548,-0.046875,0.0075416565,0.0012512207,0.033691406,0.012611389,-0.015281677,-0.02041626,-0.002216339,-0.016601562,-0.044067383,-0.010520935,-0.053375244,0.002199173,0.051574707,-0.024307251,-0.0012807846,-0.019378662,-0.020324707,-0.014350891,-0.00044226646,0.020553589,-0.0143966675,-0.030838013,0.039001465,0.0016288757,0.0025196075,0.027160645,0.04550171,0.05026245,-0.0051078796,0.052490234,0.0234375,-0.027313232,-0.059509277,0.016052246,-0.040496826,0.0014696121,0.0016822815,-0.01928711,-0.0018062592,-0.015213013,-0.017196655,-0.018096924,0.0031280518,-0.012214661,0.0078125,0.022842407,-0.056854248,-0.025802612,-0.07647705,-0.033599854,-0.005332947,0.0925293,0.013374329,-0.014251709,-0.048339844,-0.006717682,0.0055351257,-0.00076818466,0.030883789,-0.01663208,-0.01889038,-0.016723633,-0.029693604,-0.021087646,-0.03475952,0.041809082,-0.0003311634,-0.017944336,0.022781372,0.012428284,0.013153076,-0.0104522705,-0.010986328,0.025863647,-0.021835327,-0.016464233,-0.030914307,0.013282776,0.004470825,0.0009994507,-0.021499634,0.055755615,0.003276825,0.04083252,-0.04220581,-0.011306763,-0.024261475,0.01574707,0.02456665,-0.022369385,-0.01398468,0.012893677,-0.037109375,-0.07067871,0.022262573,-0.02671814,0.010429382,0.0047073364,0.012466431,0.029953003,-0.008613586,0.012023926,0.004146576,-0.021911621,-0.009559631,-0.030166626,-0.02217102,-0.03277588,0.002822876,-0.02279663,0.015991211,-0.010787964,0.00012111664,-0.014099121,-0.023880005,0.05432129,0.019088745,-0.0018577576,0.030532837,0.009590149,0.02407837,0.04156494,0.014030457,-0.03414917,0.018478394,-0.00072193146,0.00032305717,0.0050201416,0.053619385,0.03100586,-0.01612854,-0.006111145,-0.00497818,-0.0011234283,-0.021026611,-0.018829346,0.012802124,0.027740479,0.005016327,-0.035369873,0.017166138,0.012130737,-0.027694702,-0.013847351,0.012283325,0.017623901,-0.04623413,0.027526855,0.024612427,0.05328369,-0.036468506,0.014419556,0.0013256073,0.035125732,0.021347046,-0.000623703,-0.020935059,0.010292053,-0.020523071,0.009605408,-0.004928589,0.0024261475,0.013175964,0.0026378632,0.015510559,0.030807495,0.020309448,-0.040985107,-0.043151855,0.00957489,-0.023391724,-0.025634766,0.026641846,0.033355713,0.023666382,-0.011657715,0.039215088,0.035003662,-0.020645142,-0.02519226,-0.015686035,0.040283203,-0.024520874,-0.004699707,0.029891968,-0.01108551,0.02003479,-0.0574646,-0.009635925,0.003578186,0.012962341,-0.018310547,-0.033172607,-0.04336548,-0.0082473755,0.023742676,0.015365601,0.011138916,0.017456055,0.010055542,-0.0003771782,0.020248413,-0.009590149,-0.0060043335,-0.0040130615,-0.045684814,-0.01878357,-0.004470825,0.01399231,-0.035614014,0.015541077,-0.007106781,-0.025680542,0.004173279,-0.015182495,0.004131317,-0.013847351,0.0018062592,0.024215698,0.0014247894,0.023330688,-0.02420044,-0.025497437,0.008117676,0.0048332214,0.032989502,-0.038391113,0.025680542,-0.0015115738,-0.013282776,-0.0045928955,0.027389526,0.009742737,0.0234375,0.008132935,0.03086853,-0.027786255,0.0385437,-0.026229858,0.014694214,0.0012187958,-0.030883789,-0.015556335,-0.027908325,-0.023406982,0.038757324,-0.011474609,-0.0068626404,-0.019348145,-0.023971558,-0.010528564,-0.041229248,0.024765015,0.040283203,0.049560547,-0.029388428,0.0044441223,0.022979736,0.019683838,-0.005996704,-0.0068092346,0.00012230873,0.026870728,0.017852783,0.0035171509,-0.023269653,-0.013809204,0.0017213821,0.016296387,-0.058898926,-0.04626465,-0.013931274,0.009902954,-0.008743286,-0.010284424,-0.020339966,-0.038391113,-0.0063285828,-0.034057617,0.014556885,-0.00084257126,0.014572144,0.0137786865,-0.03363037,0.0049095154,0.021957397,-0.033233643,0.024398804,-0.014297485,-0.022644043,-0.05380249,0.0016345978,0.02911377,0.011039734,-0.0001784563,-0.034118652,0.0044822693,-0.026367188,-0.05657959,0.005268097,-0.022338867,0.0007658005,-0.00097322464,0.0018110275,-0.048858643,-0.013153076,-0.032684326,0.0025806427,0.022369385,0.013786316,0.0025901794,-0.0012722015,0.010009766,-0.012016296,-0.01864624,-0.03186035,0.018554688,0.012664795,0.00005942583,0.028335571,0.042999268,-0.0042762756,-0.0048561096,-0.002576828,0.005115509,0.032928467,-0.018951416,0.013458252,-0.031173706,0.009262085,-0.00969696,-0.016540527,-0.027160645,-0.0072746277,0.060058594,0.009056091,0.010017395,0.0001206398,-0.0039367676,0.013214111,0.02897644,-0.0395813,-0.007709503,-0.033599854,0.028533936,-0.009048462,0.01096344,-0.008506775,0.0065994263,-0.019317627,-0.05203247,-0.00088739395,0.011505127,-0.0034656525,-0.06640625,-0.01966858,-0.05697632,-0.007041931,-0.02041626,-0.03527832,-0.015266418,0.011177063,-0.0048942566,-0.08026123,0.009674072,0.060455322,0.0031471252,0.035949707,-0.00064229965,0.027282715,0.039031982,-0.023132324,-0.0068626404,0.010940552,-0.020492554,-0.024475098,-0.020751953,0.03237915,-0.0034446716,-0.02796936,0.019729614,0.017562866,0.021743774,-0.0009236336,0.02696228,-0.0051879883,0.015304565,0.004890442,0.023880005,-0.0115356445,-0.0026416779,0.03326416,-0.04901123,0.031463623,0.001045227,-0.0073623657,0.001791954,0.019836426,0.029449463,-0.03543091,-0.007873535,0.043914795,0.013504028,0.033813477,-0.021987915,0.03479004,0.009025574,-0.010154724,0.016418457,-0.014419556,-0.0209198,-0.041229248,-0.040924072,0.02947998,0.008102417,0.018478394,-0.009864807,-0.0116119385,0.011711121,0.0018959045,-0.0015888214,-0.025543213,-0.009361267,-0.026428223,0.006515503,0.010696411,-0.0026683807,0.010765076,0.022247314,0.01499176,0.028762817,0.0053749084,0.0007019043,0.0046310425,0.030334473,-0.008468628,0.0037403107,0.013702393,0.017623901,0.006629944,0.020996094,0.020355225,-0.045013428,-0.018081665,-0.022903442,-0.024719238,-0.0032482147,-0.014915466,-0.0021362305,-0.0019273758,0.006450653,-0.013641357,-0.03955078,0.0033950806,-0.023025513,-0.021743774,-0.006793976,-0.011909485,0.019363403,0.017150879,0.004360199,0.0035991669,-0.006916046,0.057281494,0.0024700165,-0.008300781,0.016220093,0.02923584,0.020828247,-0.024536133,-0.01007843,-0.0027751923,-0.012557983,0.011253357,-0.021072388,0.0031490326,0.031982422,-0.021255493,0.006790161,0.004524231,0.026611328,0.0038814545,0.011749268,-0.002002716,0.01876831,-0.029815674,0.03652954,-0.057678223,0.0072746277,0.024627686,0.0069999695,0.009590149,-0.018493652,-0.02420044,0.022781372,0.0039711,0.0040016174,0.040283203,-0.007598877,0.027450562,-0.021347046,-0.031402588,0.00082445145,-0.012901306,-0.023010254,0.027633667,-0.007293701,0.008743286,0.009933472,-0.038360596,0.032440186,-0.028457642,0.0035743713,0.0046157837,0.0028324127,-0.0030174255,-0.0054092407,-0.0045433044,-0.00705719,-0.021987915,-0.00083494186,-0.0036563873,0.04537964,0.0335083,0.030303955,0.032470703,0.018829346,0.012199402,-0.041412354,-0.0234375,-0.0067825317,-0.024414062,0.021377563,-0.014099121,0.036834717,0.04626465,0.014320374,0.03387451,0.03164673,0.038970947,-0.009338379,0.007972717,-0.02003479,0.023956299,-0.033569336,0.0049057007,0.008239746,0.041748047,-0.035858154,0.007068634,-0.00856781,0.018341064,-0.01626587,0.026260376,0.07269287,0.036193848,0.011077881,0.026611328,-0.009346008,-0.015541077,-0.0057029724,-0.016571045,0.06317139,0.016983032,0.055908203,0.03213501,0.0072517395,-0.0014896393,0.02003479,-0.021942139,-0.014381409,0.037384033,0.026824951,-0.027542114,-0.002626419,-0.0052261353,0.008216858,-0.041107178,-0.018859863,0.0024585724,0.017562866,0.009414673,-0.008880615,-0.007575989,-0.018493652,0.00818634,0.008972168,0.0040283203,-0.003320694,-0.0007324219,0.022232056,-0.008476257,0.028701782,-0.0138168335,0.0385437,-0.019180298,-0.01977539,0.012619019,0.007751465,0.0026931763,0.011238098,0.028045654,0.0065307617,0.031188965,0.033172607,-0.027908325,-0.012382507,0.01108551,0.016677856,-0.0011644363,0.0335083,0.04168701,0.012611389,0.032806396,0.042419434,0.0234375,-0.029281616,0.017700195,-0.0050811768,0.008453369,-0.013336182,-0.024536133,0.016952515,0.00041770935,-0.0006842613,0.009971619,-0.015914917,0.020828247,0.013900757,0.00017035007,0.005012512,-0.010971069,0.025314331,-0.003194809,0.00043225288,0.00061416626,-0.003396988,0.030776978,0.012710571,0.031707764,-0.027801514,0.023132324,0.006111145,-0.026107788,-0.0029449463,0.020446777,-0.025543213,0.004283905,-0.009117126,-0.014549255,-0.03768921,0.003698349,0.010848999,-0.016296387,0.022262573,0.004184723,-0.012886047,-0.003829956,0.021011353,0.014640808,-0.023620605,-0.009819031,-0.020568848,0.035491943,0.034942627,0.002319336,-0.0038414001,-0.01335907,-0.0024261475,0.011268616,-0.0132751465,0.008201599,0.005126953,-0.008583069,-0.021957397,0.023239136,0.018447876,0.037139893,0.030883789,-0.021316528,-0.009918213,-0.013191223,0.03503418,0.025375366,0.0118637085,-0.003314972,0.021209717,-0.010604858,0.04537964,0.02029419,0.0031204224,0.023010254,-0.013793945,0.00036001205,0.005332947,-0.02067566,0.016799927,-0.018676758,0.0041236877,-0.013366699,0.025527954,-0.011962891,-0.042022705,0.012870789,-0.009086609,-0.023834229,-0.021118164,0.023452759,-0.011230469,0.016098022,0.02897644,0.02722168,-0.023269653,0.063964844,-0.020874023,0.050994873,-0.0016155243,-0.012413025,0.064575195,0.026657104,0.039489746,0.0059318542,0.011688232,-0.019256592,-0.00029683113,0.034423828,0.034301758,0.0031547546,-0.004398346,-0.01826477,0.03616333,-0.009155273,0.030303955,0.00021922588,-0.0028076172,0.009124756,-0.010154724,-0.008621216,-0.008964539,0.006706238,0.015853882,0.052825928,-0.009719849,-0.009521484,-0.020767212,-0.019866943,0.023284912,-0.0032901764,0.0035266876,-0.006717682,-0.023468018,0.014907837,-0.040740967,-0.014434814,0.020477295,0.026657104,-0.051239014,-0.022155762,0.008148193,0.034576416,-0.034362793,0.034301758,0.01210022,-0.0037879944,0.015960693,0.034729004,-0.0057868958,0.02822876,-0.0025577545,0.02470398,0.043395996,0.01638794,-0.023040771,0.0054779053,0.009117126,-0.01889038,0.012496948,0.023803711,-0.0059814453,0.0059394836,-0.007369995,-0.011833191,-0.00040626526,0.011665344,-0.003408432,0.0041236877,-0.010261536,-0.011238098,0.0039596558,0.007583618,0.0031719208,0.0029716492,-0.000667572,-0.010475159,0.0058288574,0.04031372,0.016433716,-0.042022705,0.005420685,0.012969971,0.019348145,-0.013542175,-0.005630493,-0.022399902,-0.03982544,0.019073486,0.022415161,0.0007390976,0.0046081543,-0.021072388,0.010932922,0.028259277,0.009567261,0.009635925,0.012535095,-0.016525269,-0.003232956,-0.0138549805,-0.009124756,-0.014099121,-0.00806427,0.015213013,0.022399902,0.0008792877,-0.022354126,0.027862549,0.0032463074,0.010528564,-0.013542175,-0.0070114136,0.02027893,-0.010131836,-0.01574707,0.011405945,0.010658264,-0.00091171265,-0.016708374,-0.03579712,0.035858154,0.05645752,-0.013504028,-0.0014514923,0.016967773,0.014778137,0.022628784,0.03289795,0.015701294,0.036987305,0.023391724,-0.011779785,-0.028427124,0.019943237,-0.0017375946,-0.01651001,0.02684021,0.007572174,-0.020431519,0.031341553,-0.003145218,-0.008979797,-0.025726318,-0.019714355,-0.011650085,-0.024353027,0.018737793,0.0079574585,0.011161804,-0.02772522,-0.008872986,0.014450073,-0.015129089,-0.048095703,-0.014228821,-0.010299683,-0.010810852,-0.053588867,0.0011930466,-0.025680542,0.00995636,-0.022476196,0.005542755,-0.009552002,0.037109375,-0.006324768,-0.00025486946,0.005542755,0.027908325,0.014404297,0.0075416565,0.017181396,-0.015838623,-0.024841309,-0.013305664,-0.0023155212,-0.015823364,0.007286072,-0.01574707,0.05026245,0.007209778,-0.015068054,-0.00415802,-0.0030994415,0.0019302368,-0.011154175,-0.026779175,-0.016036987,0.01701355,0.032714844,-0.00041794777,-0.0023479462,0.037506104,-0.0259552,0.002155304,0.025436401,0.031311035,0.012535095,0.030227661,-0.0064430237,-0.0044441223,-0.024459839,0.005859375,-0.0035057068,0.004219055,0.010902405,-0.0049552917,0.008956909,0.015701294,0.012542725,-0.0044937134,-0.017181396,0.025253296,0.016357422,-0.012779236,0.036193848,0.024810791,0.00076532364,-0.019180298,-0.014961243,0.03427124,0.049713135,0.00831604,0.012466431,-0.006969452,0.000042140484,0.00042128563,0.0088272095,0.007850647,-0.018173218,-0.038024902,-0.026000977,-0.025909424,0.0236969,-0.006175995,0.009635925,-0.0004930496,0.022613525,-0.0107421875,-0.023117065,-0.018417358,0.023880005,-0.0053863525,-0.02758789,-0.013916016,-0.0021781921,0.017700195,-0.025375366,-0.0032444,-0.04498291,-0.02229309,-0.020462036,-0.013793945,0.022720337,0.012611389,-0.006477356,0.008415222,0.007019043,-0.006111145,0.0013084412,0.024291992,-0.009307861,0.010360718,0.010902405,0.016921997,-0.028259277,0.0158844,-0.00026345253,-0.009422302,0.015129089,-0.012313843,0.016738892,-0.024429321,0.024032593,0.009849548,-0.010002136,0.02798462,0.006664276,0.014793396,-0.014312744,-0.0031471252,-0.005783081,-0.0012674332,0.042236328,-0.004131317,-0.020843506,0.007041931,-0.014839172,-0.028015137,0.01209259,0.017913818,0.03225708,-0.016357422,0.05166626,-0.0045051575,0.008590698,0.011199951,0.009994507,-0.021499634,0.005695343,0.027999878,0.0035133362,0.004722595,-0.0022583008,-0.011436462,-0.02619934,-0.011314392,0.011459351,-0.0010967255,-0.019363403,0.017471313,0.018966675,0.046295166,-0.005378723,0.011917114,0.028533936,-0.0059432983,0.04006958,0.011688232,0.037017822,0.0028705597,-0.024139404,-0.008613586,-0.0018997192,-0.012565613,0.008720398,-0.006839752,0.006843567,-0.03036499,0.011070251,0.008460999,0.03744507,-0.025970459,0.01335907,-0.0259552,-0.013221741,-0.0368042,-0.006752014,-0.023529053,0.0037288666,0.047210693,0.019226074,0.014518738,0.0029525757,-0.018661499,0.033172607,0.050811768,0.0007510185,-0.040740967,-0.001291275,-0.0027561188,-0.017227173,-0.0069007874,0.011421204,-0.023849487,-0.020706177,-0.0048675537,-0.01889038,0.0006790161,-0.011505127,0.017364502,0.009399414,0.002325058,-0.0014572144,0.017745972,-0.005622864,0.006439209,0.006084442,-0.010734558,0.032592773,0.038238525,-0.02507019,0.026000977,0.01777649,-0.036376953,0.04953003,-0.0057792664,0.020935059,-0.013900757,0.014183044,-0.03942871,-0.004512787,-0.0040512085,0.016799927],"createdAt":"2026-04-18T18:36:37.271Z","updatedAt":"2026-04-23T17:31:09.389Z","lastSeenAt":"2026-04-23T17:31:09.389Z","tsv":"'/api':177 '/api/v1/carts/69':66,213 '/docs':176 '/pricing':178 '/readme':180 '/request':17,34 '0.02':16,33,98,153 '000':90 '0x8335':95 '20':89 '6':104 'Base network API' 'USDC API' 'accept':74 'access':44,72,225 'addit':191 'advertis':110 'ai':10,27,122 'ai-inference' 'amount':86 'analysi':126 'analyt':116 'api':4,21,40,71,114,158,224,239 'avail':207,219 'base':7,24,60,91 'behind':50 'beyond':168 'broader':108 'carts/69':230 'categori':112,240 'cheap API access' 'classif':129 'classification' 'commit':166 'connect':186 'content':193 'convers':146 'data':9,26,115,119 'data-analytics' 'decim':105 'document':167,202,238 'embed':130 'embeddings' 'endpoint':14,31,49,64,149,214 'equal':97 'estim':140 'exact':82 'exampl':206 'exchang':135 'export':120 'extrem':173 'feed':134 'financ':11,28,131 'finance-data' 'four':111 'function':210 'gas':139 'gate':3,20,43 'generat':147 'geocod':144 'geocoding' 'given':101 'infrastructur':142 'insight':121 'key':159 'land':170 'learn':124 'limit':162 'list':68,151 'low payment fee' 'lowpaymentfee.com':35 'machin':123 'map':233 'materi':220 'maximum':85 'metric':117 'micropay':54 'micropayment API' 'minimum':165 'name':222 'network':61 'offer':8,25 'openapi':197 'page':171,181 'path':228 'pay-per-request API' 'payment':78 'per':52,99,154 'per-request':51 'per-request-micropayment' 'place':106 'platform':5,22,41,109 'post':75 'premium':70,223 'price':133 'prompt':188 'protocol':39 'quot':138 'rate':136,161 'render':183 'report':118 'request':53,76,100,155 'request/response':200 'requir':87 'schema':201 'scheme':83 'segment':229 'sentiment':125 'sentiment-analysis' 'settl':55 'spars':174 'spec':198 'specif':63,209 'summar':128 'technic':192 'text':127 'text-summarization' 'token':137 'unclear':216 'unit':92 'usag':205 'usdc':57,94,102 'usdc-base' 'util':13,30,143 'utility-apis' 'valid':145 'varieti':47 'via':79 'wallet':187 'web3':132 'x402':2,19,38,81 'x402 API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"60558d86-f89a-4f19-82ea-c221b43827dd","listingId":"360d6491-9336-4829-bbc6-7721e57f54c1","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/carts/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:37.271Z"}],"sources":[{"listingId":"360d6491-9336-4829-bbc6-7721e57f54c1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/carts/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:37.271Z","lastSeenAt":"2026-04-23T17:31:09.389Z"}],"details":{"listingId":"360d6491-9336-4829-bbc6-7721e57f54c1","quickStartSnippet":"# The endpoint requires an x402 X-PAYMENT header with USDC on Base.\n# Use an x402-compatible client to pay $0.02 per request.\ncurl -X POST https://lowpaymentfee.com/api/v1/carts/69 \\\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 with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/carts/69"},{"claim":"USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/carts/69"},{"claim":"All listed endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a pay-per-call basis","Running data analytics queries and exporting data with no subscription commitment","Using utility services like geocoding, validation, and conversion via micropayments"],"bestFor":["Agents and developers who want zero-commitment, pay-per-use API access","Use cases requiring no API key registration or rate limit negotiation","Crypto-native workflows that can settle payments in USDC on Base"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads where per-request payment overhead is impractical","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.269Z"},"updatedAt":"2026-04-23T17:31:09.389Z"}}