{"id":"fe9f3d38-9624-4edf-9d9a-3fd3a103055a","shortId":"PyNcML","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/charges/152` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.\n\nThe broader platform advertises 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 (geocoding, validation, conversion, generation). Documentation pages exist but appear to require a wallet connection to view, so detailed request/response schemas for individual endpoints are not available from the crawl.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","gas-estimates","geocoding","validation","conversion"],"categories":["ai","data","finance","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","usdc api","base network api","no-auth api","serverless api"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all appear gated behind wallet connection — no actual docs content was retrievable.","The specific functionality of /api/v1/charges/152 ('Premium API Access') is not described anywhere; it may be a generic or placeholder endpoint.","No OpenAPI spec, request schema, or response schema is available for any endpoint.","No information on uptime, SLAs, or data freshness is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/152","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/charges/152","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, documentation pages are gated behind wallet connection, so no request/response schemas, detailed endpoint descriptions, or usage examples are available. The specific purpose of the /api/v1/charges/152 'Premium API Access' endpoint is unclear beyond its generic title.","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":"2026-04-19T03:24:32.517Z","embedding":[-0.02204895,-0.03363037,0.051483154,0.019897461,0.012611389,-0.0209198,-0.025375366,0.015670776,0.05807495,-0.05847168,0.02848816,-0.0440979,-0.032196045,-0.0345459,-0.019622803,0.011856079,0.0021095276,0.006969452,-0.038635254,0.04147339,0.013786316,-0.017593384,-0.022140503,0.024459839,-0.0060768127,-0.0146102905,0.0027332306,-0.003917694,-0.015365601,-0.04296875,0.025665283,-0.022354126,-0.011199951,0.013656616,-0.010467529,-0.0075569153,-0.01486969,0.038238525,0.02368164,-0.00078487396,-0.009338379,-0.0635376,0.0071868896,-0.015060425,-0.06591797,-0.0118255615,0.013420105,-0.013626099,0.005882263,0.0053215027,-0.029342651,-0.007194519,-0.016159058,0.0014944077,0.0105896,0.021774292,0.0016088486,0.0102005005,0.016937256,0.012519836,-0.006565094,-0.057800293,-0.009414673,0.0051498413,-0.00036621094,0.06072998,-0.011894226,0.04107666,-0.00070667267,0.064575195,0.03475952,0.054718018,0.042877197,0.006729126,0.010063171,-0.0069770813,-0.0064048767,0.055725098,-0.013938904,-0.022827148,-0.0134887695,-0.017074585,-0.040496826,-0.005897522,-0.012481689,-0.043121338,-0.021743774,0.031677246,-0.028305054,0.035827637,-0.06738281,-0.0011396408,-0.01789856,-0.007827759,0.012878418,0.0009756088,0.0029697418,0.018081665,-0.009254456,0.014503479,-0.0038928986,-0.042388916,0.009399414,0.014839172,0.03704834,0.05203247,0.02734375,0.026809692,-0.005886078,-0.006263733,-0.026611328,0.018218994,-0.024291992,-0.018707275,0.019561768,0.001004219,-0.0069503784,0.016845703,-0.04663086,0.017349243,-0.042907715,0.044067383,0.02029419,0.010864258,0.008201599,-0.041381836,-0.025131226,0.008834839,-0.026809692,-0.013549805,0.011375427,0.01689148,0.03277588,-0.020401001,-0.0184021,0.0009098053,-0.013771057,-0.019241333,-0.052612305,-0.037078857,0.040039062,-0.031173706,0.027069092,0.052703857,-0.093566895,-0.0067253113,-0.049194336,0.00020611286,-0.02255249,-0.018722534,-0.00018274784,0.025039673,-0.026519775,-0.015419006,-0.022583008,-0.026046753,-0.016296387,0.02949524,-0.008682251,0.038024902,-0.025360107,0.028930664,0.007286072,-0.0049743652,0.023605347,0.032440186,-0.011634827,-0.07495117,-0.0793457,-0.030670166,-0.017303467,-0.026351929,-0.020019531,0.00036406517,0.0041656494,-0.081848145,-0.01763916,-0.010620117,-0.0013933182,-0.033050537,-0.012062073,-0.030303955,0.017532349,-0.011024475,-0.05404663,-0.0018014908,-0.02444458,0.06402588,0.02659607,0.037200928,0.024490356,-0.009971619,0.056396484,0.04385376,-0.016723633,-0.01576233,0.023773193,-0.019607544,0.030853271,-0.012626648,0.022903442,-0.021240234,0.04434204,0.06939697,0.007133484,-0.025741577,-0.013748169,-0.053253174,-0.05307007,-0.0340271,0.021347046,0.005393982,-0.0033836365,0.036743164,-0.04257202,-0.026473999,-0.0032634735,0.013763428,0.013916016,0.05557251,0.013183594,-0.011276245,0.036346436,0.01272583,-0.061340332,0.03665161,0.028961182,0.0036907196,-0.012107849,-0.027236938,0.03744507,0.020080566,-0.032196045,0.013511658,-0.026229858,0.024734497,0.0057144165,0.014526367,0.012413025,-0.018447876,-0.030670166,-0.02267456,-0.013809204,0.028823853,0.010429382,-0.026916504,-0.033325195,-0.08850098,0.04449463,0.034576416,0.03213501,-0.012084961,0.018539429,-0.01991272,-0.0047569275,-0.0690918,0.06298828,0.076660156,0.011398315,-0.026489258,0.02746582,-0.018112183,-0.030212402,0.009689331,-0.008995056,-0.034576416,-0.013656616,0.026687622,-0.046447754,-0.013259888,0.024414062,0.0008292198,0.053131104,-0.02911377,-0.0524292,-0.01802063,-0.0034008026,0.0005788803,-0.02960205,-0.002948761,-0.011871338,0.025939941,0.023666382,0.0024166107,0.009681702,-0.005039215,0.0023956299,-0.011314392,0.00046348572,-0.011413574,-0.015220642,0.011917114,-0.0102005005,-0.052825928,0.0011444092,0.0033245087,0.062805176,-0.045532227,0.037750244,-0.0021305084,0.018493652,0.055145264,-0.006351471,-0.053985596,0.007575989,0.032318115,0.017028809,0.048095703,0.027755737,-0.034942627,-0.008644104,0.07989502,0.001203537,-0.005016327,0.003479004,-0.00019621849,0.033416748,-0.0056152344,-0.059265137,-0.042144775,0.0039520264,-0.026809692,0.030654907,-0.03036499,0.03189087,-0.01386261,0.014175415,-0.013160706,0.00013363361,-0.03942871,0.011871338,0.0044937134,0.018371582,-0.015792847,-0.022644043,0.008605957,-0.0032253265,-0.019515991,0.0055351257,0.03387451,0.020629883,-0.007106781,-0.033325195,-0.045806885,-0.00010627508,-0.012008667,0.018051147,0.02607727,0.015403748,0.04534912,-0.040802002,0.0009756088,0.013626099,0.005218506,0.03375244,-0.006717682,-0.0036296844,-0.066101074,-0.05291748,-0.024734497,-0.04067993,0.03366089,0.041412354,-0.0022563934,0.055725098,0.005264282,-0.03137207,-0.030181885,0.01828003,-0.043395996,-0.0060424805,0.04067993,-0.011833191,-0.040740967,0.0059165955,-0.00068187714,-0.0073432922,0.03488159,0.019577026,0.020950317,0.0690918,0.036102295,0.0038223267,0.01651001,0.012451172,0.031585693,0.010063171,-0.019500732,-0.03237915,-0.00995636,0.032592773,-0.030303955,-0.014907837,-0.064941406,0.06744385,0.03479004,0.103637695,0.03463745,0.0011520386,0.036071777,-0.022766113,0.018051147,-0.0234375,-0.028167725,-0.02218628,-0.04119873,0.030029297,-0.012489319,-0.011009216,-0.027908325,0.043914795,0.002937317,0.017105103,-0.03111267,0.05078125,-0.01386261,-0.011917114,0.021057129,0.016296387,0.05441284,0.068359375,-0.047454834,0.027420044,0.030410767,-0.03390503,-0.004852295,0.048736572,-0.017913818,-0.0055122375,-0.060577393,-0.019439697,-0.005504608,-0.009407043,-0.049438477,-0.010444641,0.0063819885,0.032836914,0.031173706,-0.0026950836,-0.012214661,-0.01626587,-0.02229309,-0.047851562,0.0022392273,-0.043518066,-0.007713318,0.040374756,-0.03062439,-0.00932312,0.0018157959,-0.0053710938,-0.0132369995,0.008453369,0.037231445,-0.012718201,-0.05697632,0.03741455,-0.0027561188,0.008712769,0.008407593,0.040985107,0.04006958,0.035369873,0.03955078,0.008956909,-0.007335663,-0.06262207,0.020385742,-0.041168213,0.006298065,0.027832031,-0.012451172,-0.0053977966,-0.012832642,-0.03677368,-0.030578613,0.023635864,-0.024963379,-0.0040512085,0.007068634,-0.021057129,-0.020065308,-0.057647705,-0.013748169,-0.020462036,0.052642822,0.021957397,-0.005367279,-0.054138184,-0.012420654,0.020523071,0.010169983,0.032470703,-0.014518738,-0.007160187,-0.008239746,-0.041412354,0.0005288124,-0.023757935,0.022155762,-0.012214661,0.0051956177,0.014434814,0.009468079,0.01889038,-0.0047683716,0.0128479,0.039245605,-0.025909424,-0.014907837,-0.018005371,0.03274536,0.014060974,0.0019111633,-0.045562744,0.034454346,0.013381958,0.034454346,-0.04043579,0.0022296906,-0.0008149147,0.011672974,0.021011353,-0.010246277,-0.004508972,-0.013824463,-0.04736328,-0.074157715,0.036712646,-0.030776978,0.02798462,0.018096924,0.001625061,0.032440186,-0.02999878,0.0054512024,0.018218994,-0.021118164,-0.009048462,-0.019317627,-0.033966064,-0.013809204,-0.018249512,-0.020767212,0.02178955,-0.015235901,0.0146102905,-0.010543823,-0.024154663,0.019882202,0.0055885315,-0.010322571,0.021591187,-0.005645752,0.028747559,0.048858643,0.013076782,-0.043395996,0.016342163,-0.0048828125,0.006126404,-0.009246826,0.04547119,0.028686523,-0.006313324,-0.01399231,-0.0047302246,-0.011962891,-0.02432251,0.010284424,0.0070381165,0.0032138824,-0.008407593,-0.03805542,0.01272583,0.0023956299,-0.034118652,-0.0119018555,0.01977539,0.010574341,-0.036834717,0.027359009,0.038513184,0.04650879,-0.016326904,0.0036716461,0.001045227,0.042999268,0.028793335,0.01576233,-0.0023841858,0.023666382,-0.008911133,0.010856628,-0.016830444,-0.0121154785,0.020355225,0.0032157898,0.01727295,0.025726318,0.0035438538,-0.026626587,-0.025268555,0.016479492,-0.015586853,-0.03237915,0.024169922,0.012252808,0.011726379,-0.02897644,0.01890564,0.004600525,-0.013008118,-0.017333984,-0.0005931854,0.040771484,-0.0022964478,-0.012077332,0.017089844,0.0053901672,0.023468018,-0.050201416,-0.007205963,0.0104904175,0.0048446655,-0.023925781,-0.040618896,-0.03475952,0.008666992,0.03616333,0.011421204,0.03012085,0.030960083,0.004951477,0.005355835,0.01586914,-0.0025424957,-0.011314392,-0.0050468445,-0.05026245,-0.014945984,-0.021560669,0.0006079674,-0.03845215,0.019042969,-0.0018892288,-0.04156494,0.0031375885,-0.011474609,0.0004312992,-0.0082092285,0.010292053,0.04031372,0.0029754639,0.009048462,-0.025177002,-0.028640747,-0.00025987625,-0.0001385212,0.013900757,-0.04876709,0.0059394836,-0.011428833,-0.010566711,0.009429932,0.014083862,0.021331787,0.020614624,0.018096924,0.031707764,-0.04537964,0.053253174,-0.029556274,0.027526855,0.0008535385,-0.039733887,-0.012008667,-0.023483276,-0.0048561096,0.04159546,-0.02571106,-0.0013389587,-0.02720642,-0.039794922,0.0014867783,-0.060424805,0.011695862,0.03527832,0.042755127,-0.01663208,-0.0047073364,0.010536194,0.0032730103,-0.02116394,0.0058937073,-0.027496338,0.018005371,0.017623901,0.0030899048,-0.026550293,-0.027252197,-0.016448975,-0.0048599243,-0.050476074,-0.058746338,-0.010108948,-0.0018663406,-0.010528564,-0.010322571,-0.016921997,-0.03010559,-0.0075912476,-0.045776367,0.018875122,0.0010261536,0.019515991,0.01071167,-0.021560669,0.0022506714,0.010971069,-0.01675415,0.032409668,0.003501892,-0.0065345764,-0.034301758,0.0028247833,0.018615723,0.019836426,-0.0052604675,-0.028457642,-0.009880066,-0.021896362,-0.05911255,0.00014150143,-0.008743286,-0.0035934448,-0.009628296,0.0040130615,-0.05307007,-0.0013570786,-0.029953003,-0.009315491,0.019195557,0.012054443,0.010971069,0.002664566,0.019210815,-0.0006251335,-0.0037460327,-0.02923584,0.010910034,0.010665894,0.011024475,0.022994995,0.04107666,-0.0064048767,-0.02355957,-0.00047898293,0.008850098,0.011390686,-0.023880005,0.003709793,-0.020431519,0.017211914,-0.011993408,-0.009719849,-0.03692627,-0.007896423,0.07928467,-0.00030064583,-0.022216797,-0.0076026917,-0.022201538,0.0146865845,0.032287598,-0.046875,-0.005016327,-0.029968262,0.014152527,-0.02796936,0.010276794,-0.008506775,0.029312134,-0.020339966,-0.051635742,-0.018661499,0.0014238358,-0.020904541,-0.06359863,-0.029342651,-0.06518555,0.014579773,-0.016174316,-0.02508545,0.00289917,0.007701874,-0.022583008,-0.079589844,0.008285522,0.05697632,0.0040283203,0.02897644,-0.00957489,0.008239746,0.028305054,-0.029708862,-0.00041890144,0.024765015,-0.023361206,-0.017715454,-0.0102005005,0.015403748,-0.012939453,-0.0031204224,0.01751709,0.0031585693,0.009246826,0.0024299622,0.020477295,-0.012969971,0.03010559,-0.008972168,0.014099121,-0.010025024,-0.007949829,0.03375244,-0.04446411,0.021865845,0.019973755,-0.01058197,0.005962372,0.03048706,0.043548584,-0.036987305,-0.016677856,0.015052795,0.0009851456,0.035308838,-0.024795532,0.04272461,0.01737976,-0.013435364,0.011741638,-0.018844604,-0.021697998,-0.0132751465,-0.03439331,0.027938843,0.0057258606,0.012870789,-0.017318726,0.002450943,0.024139404,0.0026569366,0.0066223145,-0.009315491,-0.011474609,-0.01058197,0.006793976,-0.0033397675,0.0040779114,0.0043945312,0.03552246,0.017105103,0.036621094,0.0065307617,-0.011207581,-0.0072898865,0.03010559,-0.015945435,0.0029468536,0.028717041,0.014892578,0.023895264,0.019805908,0.016494751,-0.04333496,-0.013160706,-0.017425537,-0.029953003,0.00008505583,-0.013534546,-0.012794495,-0.0027561188,0.007041931,-0.019805908,-0.03366089,-0.003704071,-0.030960083,-0.018493652,0.008308411,-0.014137268,0.02519226,0.0010604858,0.009971619,0.0006017685,-0.0032730103,0.041503906,-0.010437012,-0.0063323975,0.02859497,0.029953003,0.017074585,-0.030395508,-0.013061523,-0.013084412,-0.011726379,0.00037312508,-0.030761719,0.008552551,0.049865723,-0.013771057,0.0095825195,-0.0003774166,0.024215698,-0.0035305023,0.0009188652,-0.011940002,0.012481689,-0.0056037903,0.036193848,-0.041748047,0.020904541,0.010398865,-0.0025787354,-0.02671814,-0.023025513,-0.02470398,0.023071289,0.006324768,0.00022006035,0.049041748,0.008598328,0.023040771,-0.016952515,-0.025146484,0.02166748,-0.029815674,-0.020706177,0.02684021,-0.0073623657,0.0023403168,0.014480591,-0.021087646,0.02519226,-0.032409668,0.010574341,0.004508972,-0.0024929047,0.0018911362,-0.011230469,-0.015899658,-0.0067100525,-0.0074882507,0.017166138,-0.0034751892,0.04385376,0.020828247,0.03665161,0.050476074,0.024353027,0.00459671,-0.03845215,-0.01965332,0.00046300888,-0.023010254,0.024658203,-0.0034656525,0.052886963,0.031097412,0.017288208,0.03036499,0.039794922,0.038269043,0.009788513,0.014656067,-0.022491455,0.008125305,-0.0042152405,0.029449463,-0.0005326271,0.039794922,-0.027755737,0.017181396,0.011451721,0.02330017,-0.020736694,0.03010559,0.070495605,0.016082764,-0.015312195,0.042785645,-0.0022850037,-0.009544373,-0.0062789917,-0.013496399,0.048706055,0.0070114136,0.040649414,0.052764893,0.014083862,-0.009750366,0.02178955,-0.03451538,-0.033447266,0.06628418,0.036376953,-0.022399902,-0.016693115,-0.0031433105,0.011482239,-0.043548584,-0.021835327,0.018936157,-0.01285553,0.0045928955,-0.012306213,-0.0121536255,-0.019500732,0.007270813,0.02330017,0.013893127,-0.014060974,0.022216797,0.026443481,0.00024580956,0.026672363,0.0006093979,0.025222778,-0.026184082,-0.024490356,0.01675415,0.01776123,-0.014228821,-0.007637024,0.025360107,0.005558014,0.03817749,0.03555298,-0.023101807,0.011291504,0.022994995,0.01713562,-0.00036382675,0.05770874,0.046966553,0.019119263,0.0340271,0.03152466,0.032684326,-0.035339355,0.0155181885,0.0055732727,0.010032654,0.0044441223,-0.0040397644,0.011375427,-0.009407043,0.014175415,-0.006652832,-0.006336212,0.02609253,0.023071289,-0.012054443,-0.013008118,0.0018815994,0.013671875,-0.018218994,-0.0042648315,0.012054443,-0.02243042,0.027938843,0.011260986,0.02796936,-0.020446777,0.019439697,-0.003791809,-0.023529053,-0.0078125,0.023162842,-0.04928589,-0.0001502037,0.0028800964,0.00094652176,-0.03869629,0.0034503937,0.023162842,-0.01689148,0.031829834,0.0074005127,0.00030517578,-0.005218506,0.021606445,0.009361267,-0.0025081635,-0.014427185,-0.024154663,0.023391724,0.04095459,-0.0045318604,0.007621765,-0.026351929,-0.0039138794,-0.000070273876,-0.009628296,0.0003273487,-0.0074806213,-0.024383545,-0.016708374,0.02218628,0.034729004,0.02330017,0.048431396,-0.019958496,-0.016571045,0.009300232,0.035003662,-0.0035209656,-0.0030117035,-0.0025539398,0.02305603,-0.021270752,0.048675537,0.033355713,0.008377075,0.038513184,-0.0012874603,-0.013580322,0.012878418,-0.014007568,0.037200928,-0.019973755,0.0013484955,0.000036478043,0.028533936,-0.008514404,-0.023666382,0.0026397705,-0.011161804,-0.024642944,-0.021255493,0.016326904,0.0040740967,0.029037476,0.03765869,0.03262329,-0.023025513,0.061309814,0.0027503967,0.039733887,0.0030708313,-0.014152527,0.049316406,0.016784668,0.035125732,0.019836426,0.0027503967,-0.03314209,0.012329102,0.03479004,0.02645874,0.005760193,0.015625,-0.007217407,0.034057617,-0.008674622,0.036010742,-0.010391235,0.003124237,0.0068130493,-0.00018012524,0.0021820068,0.0017671585,-0.0045318604,-0.000023543835,0.0546875,-0.016220093,-0.0024089813,-0.03125,-0.008399963,0.02973938,-0.0037002563,0.0023460388,-0.007419586,-0.019073486,0.012832642,-0.022720337,-0.03475952,0.01687622,0.023773193,-0.05596924,-0.01826477,0.005809784,0.027236938,-0.027069092,0.03503418,0.028305054,-0.0068206787,0.00083208084,0.04800415,-0.014228821,0.022613525,-0.0066108704,0.025299072,0.032226562,0.0065193176,-0.024673462,-0.009521484,0.0029010773,-0.0030937195,0.014228821,0.033843994,-0.014709473,0.006580353,-0.007858276,-0.012573242,-0.017593384,0.0042762756,-0.025100708,0.0135269165,-0.011787415,-0.010902405,0.006454468,0.007850647,0.0013551712,0.007858276,-0.013656616,-0.016021729,0.0048217773,0.028717041,0.026870728,-0.032165527,-0.0056114197,0.00491333,0.0069007874,-0.023208618,-0.012390137,0.0014915466,-0.03817749,0.0076904297,0.016082764,0.012245178,0.010772705,-0.02444458,0.0013284683,0.028274536,0.003206253,0.019210815,0.00019192696,-0.009742737,0.012687683,-0.006336212,-0.00945282,-0.007926941,-0.018539429,0.008216858,0.021011353,-0.006111145,-0.025772095,0.027313232,0.0020961761,0.01524353,-0.0076026917,-0.016143799,0.027526855,-0.006046295,-0.0037212372,0.0038280487,0.025650024,-0.01576233,0.0001693964,-0.011436462,0.035827637,0.05810547,-0.014282227,-0.0105896,0.022232056,0.019439697,0.018814087,0.043945312,0.0067825317,0.038330078,0.016815186,-0.019729614,-0.0135269165,0.025268555,-0.0115356445,-0.033050537,0.017990112,-0.0063209534,-0.009391785,0.016937256,0.015670776,-0.0039711,-0.02859497,-0.011268616,-0.014793396,-0.009353638,0.011993408,-0.012413025,0.01939392,-0.01322937,-0.005382538,0.009963989,-0.031143188,-0.058746338,-0.015014648,0.0042152405,-0.012809753,-0.052337646,-0.0070381165,-0.024856567,-0.0020599365,-0.02557373,-0.008148193,-0.021774292,0.018005371,-0.022369385,-0.009765625,-0.004207611,0.01448822,0.033172607,-0.005012512,0.012458801,-0.031021118,-0.013000488,-0.032989502,0.007381439,-0.012382507,0.01625061,0.012359619,0.035827637,0.030227661,-0.013916016,-0.00023901463,-0.016189575,-0.009124756,-0.011993408,-0.024383545,-0.030029297,0.031341553,0.015716553,-0.0077781677,-0.010047913,0.039215088,-0.023727417,-0.009124756,0.022445679,0.04547119,0.0050621033,0.021331787,-0.017425537,0.0062179565,-0.0184021,-0.0011720657,-0.015014648,-0.0035800934,0.019180298,-0.0021362305,-0.0012493134,0.0074920654,0.02017212,-0.014984131,-0.013206482,0.031677246,0.013320923,-0.021560669,0.043273926,0.011512756,0.0079574585,-0.010231018,-0.004878998,0.024002075,0.054473877,0.008628845,0.017181396,-0.006626129,0.0058555603,-0.0066337585,0.011154175,0.021728516,-0.02798462,-0.052520752,-0.021362305,-0.033050537,0.016662598,0.0075531006,0.010726929,-0.004322052,0.014228821,-0.020217896,-0.027023315,-0.017364502,0.03250122,0.017227173,-0.012054443,-0.012779236,0.013092041,0.017501831,-0.03427124,-0.004020691,-0.034332275,-0.027389526,-0.009346008,-0.01864624,0.02633667,0.0069847107,-0.0051574707,-0.0011959076,-0.0023269653,0.0018491745,-0.0010490417,0.02658081,-0.017807007,-0.00043821335,0.028961182,0.019378662,-0.025360107,0.022735596,-0.02029419,-0.0017490387,0.014320374,-0.0073547363,0.018188477,-0.02482605,0.034484863,-0.0072898865,-0.0011711121,0.034454346,-0.009887695,0.0074272156,-0.020690918,-0.0046577454,-0.00178051,-0.0032730103,0.041870117,-0.016220093,-0.017623901,0.012748718,-0.01474762,-0.025161743,0.002450943,0.014709473,0.03326416,-0.0004553795,0.049072266,-0.017486572,-0.005748749,0.017211914,0.009925842,-0.02267456,0.008377075,0.028869629,0.011756897,0.005142212,0.00024867058,-0.009086609,-0.026535034,-0.007095337,0.020751953,-0.0024528503,-0.017791748,0.030029297,0.011276245,0.053985596,-0.009895325,0.025115967,0.016021729,0.0017375946,0.026382446,-0.0045776367,0.0546875,-0.0088272095,-0.026306152,0.0024490356,-0.00091934204,-0.025283813,-0.0021400452,-0.00020563602,-0.0024433136,-0.04272461,0.01007843,-0.0074539185,0.027679443,-0.021530151,0.010391235,-0.028717041,-0.0038471222,-0.039367676,-0.016845703,-0.03475952,0.011154175,0.034454346,0.0015144348,0.034179688,0.006542206,-0.020629883,0.031982422,0.041900635,0.0037822723,-0.030303955,-0.018539429,0.007270813,0.002544403,0.0069389343,0.00944519,-0.012413025,-0.008781433,-0.0016822815,-0.012229919,0.013175964,-0.003358841,0.016357422,0.009468079,0.00248909,-0.0095825195,0.032226562,-0.0037326813,-0.010612488,0.014099121,0.008926392,0.039916992,0.032592773,-0.01737976,0.025726318,0.008995056,-0.040863037,0.061462402,-0.0011987686,0.03062439,-0.013450623,0.01210022,-0.036132812,-0.03289795,-0.015312195,0.014526367],"createdAt":"2026-04-18T18:44:21.199Z","updatedAt":"2026-04-22T18:03:47.402Z","lastSeenAt":"2026-04-22T18:03:47.402Z","tsv":"'/api/v1/charges/152':96 '/request':13,28 '0.02':12,27,64,123 '000':112 '0x8335':117 '20':111 '2913':118 '300':131 '402':106 'accept':136 'access':102 'account':76 'advertis':145 'ai':155 'ai-inference' 'ai/ml':49 'analysi':159 'analyt':48,149 'api':5,20,37,74,101 'appear':184 'application/json':141 'attach':84 'avail':201 'base':8,23,71,113,120 'base network api' 'broad':42 'broader':143 'call':4,19 'caller':82 'catalog':43 'categori':146 'challeng':107 'classif':162 'classification' 'connect':189 'convers':178 'conversion' 'crawl':204 'crypto-quotes' 'data':47,52,148,152 'data-analytics' 'detail':193 'document':180 'embed':163 'embeddings' 'enabl':36 'endpoint':45,57,94,135,198 'equal':122 'estim':173 'exact':128 'exchang':168 'exist':182 'export':153 'feed':167 'financ':164 'finance-data' 'finance/web3':51 'gas':172 'gas-estimates' 'generat':179 'geocod':176 'geocoding' 'header':88 'includ':147 'individu':197 'infer':50 'infrastructur':54,175 'insight':154 'key':75 'learn':157 'limit':79 'list':98 'low payment fee' 'lowpaymentfee.com':31 'machin':156 'metric':150 'micropayment api' 'network':9,24,72 'no-auth api' 'offer':40 'page':181 'pay':2,17,60 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':59 'payment':87,125 'per':3,18,61 'platform':6,21,38,144 'post':137 'premium':100 'price':166 'quot':171 'rate':78,169 'report':151 'request':62,91,108,138 'request/response':194 'requir':81,186 'return':104,140 'schema':195 'scheme':126 'second':132 'sentiment':158 'sentiment-analysis' 'serverless api' 'settl':66 'simpli':83 'span':46 'specif':93 'summar':161 'text':160 'text-summarization' 'timeout':133 'token':170 'unit':114 'usdc':15,30,68,116 'usdc api' 'usdc-base' 'util':55 'valid':177 'validation' 'via':10,25 'view':191 'wallet':188 'web3':165 'x402':11,26,35,86 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"4f015af2-0c80-4a9f-9e61-42ed2315019b","listingId":"fe9f3d38-9624-4edf-9d9a-3fd3a103055a","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/charges/152","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:21.199Z"}],"sources":[{"listingId":"fe9f3d38-9624-4edf-9d9a-3fd3a103055a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/152","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:21.199Z","lastSeenAt":"2026-04-22T18:03:47.402Z"}],"details":{"listingId":"fe9f3d38-9624-4edf-9d9a-3fd3a103055a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/152 \\\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":"All endpoints 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":"The x402 challenge for /api/v1/charges/152 requests maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/charges/152"},{"claim":"Platform offers endpoints in Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Agent-driven data retrieval without API key management","On-demand AI inference (sentiment, summarization, classification, embeddings) paid per call","Fetching real-time crypto prices, gas estimates, or exchange rates with micropayments","Geocoding or data validation as a utility service with no subscription commitment","Programmatic data export and analytics without rate limits"],"bestFor":["AI agents needing frictionless, keyless API access via x402","Developers who want pay-as-you-go pricing without subscriptions","Applications requiring low-cost micropayment-settled API calls on Base"],"notFor":["High-volume batch workloads where per-request pricing becomes expensive","Users who need detailed SLAs, uptime guarantees, or enterprise support","Applications requiring non-USDC or non-Base-network payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:24.641Z"},"updatedAt":"2026-04-22T18:03:47.402Z"}}