{"id":"61877e11-645e-49cb-81f0-4a32a6daee52","shortId":"xtEPdr","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints across four 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, payable in USDC on the Base network via the x402 protocol.\n\nThe specific endpoint at `/api/v1/charges/392` 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 given USDC's 6 decimals. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header. The endpoint accepts POST requests and returns application/json.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, 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 examples of what the \"Premium API Access\" endpoint actually returns. Without knowing the input parameters or output format, agents will need to experiment or rely on the generic endpoint name.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-apis"],"categories":["api-platform","llm","finance","geo"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","data analytics api","ai inference api"],"warnings":["No OpenAPI or schema documentation available — request/response formats are unknown","All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content","The endpoint name 'Premium API Access' is generic; it is unclear what data or functionality this specific charge ID (392) provides","Cannot verify what the endpoint actually returns without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/392","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/392","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI spec, no documentation of request parameters or response schemas, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The endpoint name 'Premium API Access' is generic and uninformative. Without knowing what this specific endpoint does or what it returns, this is effectively a stub listing.","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":"2026-04-19T04:01:38.722Z","embedding":[-0.027359009,-0.03173828,0.042663574,0.012710571,0.022506714,-0.023620605,-0.024246216,0.025772095,0.06262207,-0.06402588,0.025405884,-0.041381836,-0.028778076,-0.043304443,-0.011520386,0.015548706,-0.0019302368,0.005794525,-0.039031982,0.037719727,0.011802673,-0.017623901,-0.029586792,0.02319336,-0.0046539307,-0.025421143,0.00066280365,-0.014297485,-0.022277832,-0.042938232,0.036865234,-0.024597168,0.00063705444,0.0015096664,-0.0019817352,-0.009437561,-0.019042969,0.032806396,0.030319214,-0.0054130554,-0.0027713776,-0.050323486,0.0033779144,-0.013023376,-0.05831909,-0.021835327,0.021514893,-0.014480591,0.0062065125,0.01424408,-0.0435791,-0.005756378,-0.013473511,0.014556885,0.009262085,0.023345947,-0.0028934479,0.007381439,0.009376526,0.0054359436,0.00019788742,-0.050842285,-0.02168274,0.008071899,-0.012145996,0.052612305,-0.014320374,0.048675537,-0.0062294006,0.052581787,0.049468994,0.046966553,0.031402588,0.004261017,0.005126953,-0.0066604614,-0.010025024,0.05883789,-0.012878418,-0.007129669,-0.01600647,-0.006965637,-0.042236328,-0.008506775,-0.01676941,-0.042633057,-0.021209717,0.022918701,-0.034210205,0.03289795,-0.066833496,-0.0067749023,-0.02128601,0.0066375732,0.0072402954,0.007610321,0.0017442703,0.020095825,-0.017120361,0.019561768,-0.005203247,-0.037109375,0.012825012,0.014190674,0.04043579,0.044158936,0.019058228,0.020965576,-0.008071899,-0.01751709,-0.042297363,0.01838684,-0.020584106,-0.009635925,0.00957489,0.015350342,-0.008056641,0.010765076,-0.030288696,0.0045204163,-0.053649902,0.04071045,0.024291992,0.0013475418,0.015289307,-0.05380249,-0.024398804,0.0053520203,-0.029067993,-0.022277832,0.011367798,0.012786865,0.027267456,-0.027389526,-0.0131073,-0.0038871765,-0.0143966675,-0.021377563,-0.047424316,-0.033843994,0.039916992,-0.026565552,0.02368164,0.036071777,-0.10119629,-0.0146865845,-0.04660034,0.005672455,-0.03781128,-0.0052948,-0.012878418,0.036224365,-0.03250122,-0.022506714,-0.016052246,-0.016830444,-0.010383606,0.018447876,-0.018981934,0.029525757,-0.020965576,0.028518677,0.0076904297,-0.009887695,0.027526855,0.030517578,-0.017364502,-0.08959961,-0.0859375,-0.034240723,-0.01663208,-0.035369873,-0.029373169,-0.013511658,0.00242424,-0.06439209,-0.017837524,-0.0017347336,0.005393982,-0.037475586,-0.013374329,-0.024917603,0.018478394,-0.002653122,-0.06222534,-0.016647339,-0.02319336,0.06842041,0.023406982,0.02861023,0.026763916,-0.011413574,0.06591797,0.030288696,-0.020874023,-0.023040771,0.021636963,-0.014297485,0.026611328,-0.00198555,0.005832672,-0.034973145,0.039031982,0.06652832,0.008224487,-0.021331787,-0.007911682,-0.05831909,-0.049224854,-0.03744507,0.014266968,0.0041618347,0.00060653687,0.04638672,-0.049346924,-0.038513184,-0.014816284,0.011451721,0.010063171,0.05734253,0.018798828,-0.0030326843,0.016921997,0.005458832,-0.04333496,0.03652954,0.025405884,0.013893127,-0.014266968,-0.027267456,0.032592773,0.01914978,-0.020721436,0.013946533,-0.019180298,0.030212402,0.01360321,0.02255249,0.019058228,-0.013824463,-0.026870728,-0.018051147,-0.01399231,0.019760132,0.0146865845,-0.030410767,-0.039611816,-0.08099365,0.060638428,0.030181885,0.04046631,-0.012077332,0.011222839,-0.02331543,-0.0028057098,-0.07562256,0.060058594,0.084228516,0.013549805,-0.018508911,0.009429932,0.00011920929,-0.023971558,0.00076007843,-0.006706238,-0.033477783,-0.019577026,0.013061523,-0.050628662,-0.015808105,0.016281128,0.014930725,0.067993164,-0.02029419,-0.056610107,-0.02557373,-0.00082731247,0.0013685226,-0.022842407,0.0104522705,-0.015731812,0.02017212,0.01763916,0.0014467239,0.015106201,-0.0013151169,0.0074920654,-0.0154800415,-0.004383087,-0.020370483,-0.024215698,0.00008904934,-0.013786316,-0.04977417,0.014556885,0.0033817291,0.059906006,-0.034362793,0.04385376,-0.0026474,0.0014820099,0.052856445,0.0005159378,-0.04421997,0.018356323,0.033050537,0.016693115,0.050567627,0.01676941,-0.05041504,-0.007965088,0.0826416,-0.0020599365,-0.0014257431,-0.00060606,0.0037441254,0.03463745,-0.0093307495,-0.058685303,-0.0435791,-0.0035743713,-0.023345947,0.030517578,-0.02809143,0.026000977,-0.015472412,0.0057258606,-0.016433716,0.0055999756,-0.028152466,0.017608643,-0.011520386,0.005584717,-0.00843811,-0.02192688,0.015037537,0.0035743713,-0.023651123,0.007446289,0.03466797,0.024597168,-0.017288208,-0.03894043,-0.031585693,-0.00064373016,-0.0155181885,0.021392822,0.035217285,0.02760315,0.049957275,-0.032989502,0.008628845,0.030227661,0.01576233,0.037597656,-0.010406494,0.002861023,-0.07098389,-0.046081543,-0.034332275,-0.04156494,0.033691406,0.032592773,-0.0033950806,0.048706055,0.0015354156,-0.032073975,-0.032958984,0.03036499,-0.051330566,-0.005844116,0.025253296,-0.009857178,-0.039855957,-0.0132369995,-0.011962891,0.0020141602,0.030700684,0.0039138794,0.015274048,0.05807495,0.03463745,0.0013427734,0.030670166,0.022125244,0.02772522,0.02218628,-0.026565552,-0.01852417,-0.0031318665,0.03677368,-0.024887085,-0.02633667,-0.06896973,0.07104492,0.035949707,0.08074951,0.019943237,0.008300781,0.03314209,-0.013076782,0.0041503906,-0.017959595,-0.01838684,-0.025650024,-0.04220581,0.043029785,-0.017105103,-0.0034332275,-0.019958496,0.05328369,-0.015853882,0.016983032,-0.023406982,0.052612305,-0.0061035156,0.0052261353,0.008972168,0.004699707,0.053253174,0.064819336,-0.046661377,0.03579712,0.02835083,-0.050872803,0.009391785,0.054779053,-0.015274048,-0.011764526,-0.058685303,-0.02305603,-0.007911682,-0.0038547516,-0.05303955,-0.003932953,0.012741089,0.018127441,0.037506104,-0.0102005005,-0.021270752,-0.0021209717,-0.026138306,-0.053131104,-0.006958008,-0.044555664,-0.0014925003,0.03652954,-0.024353027,-0.012580872,-0.0019235611,-0.016067505,-0.0021820068,0.00022149086,0.041625977,-0.013038635,-0.052520752,0.037231445,0.0076026917,0.009384155,0.011169434,0.04663086,0.030670166,0.022384644,0.054534912,0.0006723404,-0.019622803,-0.06008911,0.031097412,-0.052001953,0.009101868,0.022827148,-0.0093307495,-0.0015439987,-0.009300232,-0.03491211,-0.039123535,0.0055160522,-0.013015747,-0.004032135,0.011497498,-0.026473999,-0.027359009,-0.055267334,-0.009300232,-0.006931305,0.068725586,0.015701294,-0.017318726,-0.055145264,-0.005268097,0.03274536,-0.0015392303,0.033569336,-0.014190674,-0.0146102905,0.0027809143,-0.042938232,0.0024337769,-0.02494812,0.028076172,-0.008644104,-0.013069153,0.02319336,0.00554657,0.014427185,-0.008766174,0.006664276,0.032287598,-0.040649414,-0.006164551,-0.019760132,0.033294678,0.008628845,-0.00074100494,-0.038208008,0.034179688,0.014923096,0.032409668,-0.026794434,-0.003042221,0.005355835,0.0056381226,0.03161621,-0.014709473,-0.014259338,-0.016113281,-0.05215454,-0.04159546,0.029037476,-0.022903442,0.027542114,0.0211792,0.0055885315,0.02406311,-0.024734497,0.016647339,0.016036987,-0.024291992,-0.008323669,-0.019866943,-0.034210205,-0.0121154785,-0.0003118515,-0.021270752,0.022216797,-0.01902771,0.010177612,-0.002861023,-0.024993896,0.02532959,0.007621765,-0.012969971,0.022628784,-0.0011806488,0.023468018,0.04940796,0.012451172,-0.04937744,0.022537231,-0.009902954,0.017944336,-0.012290955,0.04434204,0.03527832,-0.0072784424,-0.0031166077,-0.0015258789,-0.023788452,-0.021392822,0.0007634163,0.0012369156,0.024124146,-0.008094788,-0.054901123,0.019592285,0.003030777,-0.02418518,-0.01448822,0.015640259,0.01373291,-0.03765869,0.03152466,0.021835327,0.05633545,-0.018585205,0.008506775,0.010627747,0.02999878,0.03878784,0.012924194,-0.012413025,0.015014648,-0.006023407,0.009712219,-0.016357422,0.0075912476,0.018692017,-0.0058555603,0.017288208,0.033996582,0.019729614,-0.028518677,-0.025024414,0.014984131,-0.019515991,-0.026489258,0.020645142,0.022903442,0.005455017,-0.031402588,0.025939941,0.0059776306,-0.020080566,-0.015731812,-0.0021076202,0.032684326,-0.017990112,-0.01373291,0.020843506,-0.0003528595,0.029586792,-0.046417236,-0.005176544,0.012008667,0.011398315,-0.029525757,-0.05026245,-0.03933716,0.014930725,0.028167725,0.006816864,0.027938843,0.036224365,0.0037631989,0.0065727234,0.02166748,-0.00074481964,-0.026901245,-0.0082092285,-0.044921875,-0.023757935,-0.0070114136,0.0037136078,-0.031463623,0.017349243,-0.0062828064,-0.037475586,0.0023880005,-0.009513855,-0.00894928,-0.003068924,0.016204834,0.041809082,0.000151515,0.011795044,-0.022445679,-0.030471802,-0.0031719208,-0.003730774,0.023361206,-0.05432129,0.014320374,-0.004360199,-0.013656616,0.0036716461,0.014205933,0.017425537,0.02986145,0.01235199,0.026046753,-0.03616333,0.04937744,-0.037597656,0.03152466,0.0026359558,-0.04711914,-0.0064468384,-0.033081055,-0.008262634,0.03451538,-0.020965576,-0.013267517,-0.03277588,-0.030212402,-0.0014514923,-0.05807495,0.010749817,0.03640747,0.041656494,-0.017120361,0.0051460266,0.003364563,-0.0018062592,-0.022888184,-0.0006227493,-0.013381958,0.019332886,0.02130127,0.011413574,-0.013633728,-0.016098022,-0.026687622,0.0023460388,-0.061309814,-0.0592041,-0.014633179,0.0043144226,-0.0134887695,-0.014572144,-0.025848389,-0.035461426,0.0054893494,-0.046905518,0.015014648,0.0004954338,0.020935059,0.012870789,-0.016571045,0.0005426407,0.014724731,-0.015014648,0.031173706,-0.0042304993,-0.0041656494,-0.029663086,0.0008778572,0.028930664,0.014076233,0.00023174286,-0.014984131,-0.006801605,-0.023910522,-0.051483154,-0.0017786026,-0.003566742,-0.010551453,-0.013618469,0.010246277,-0.056152344,-0.0011043549,-0.021438599,-0.0034427643,0.030960083,0.019424438,0.003288269,-0.0075798035,0.015731812,-0.0019025803,-0.009529114,-0.034210205,0.015899658,0.010734558,0.0032291412,0.017349243,0.04522705,-0.0016641617,-0.017730713,0.0054740906,0.0072784424,0.015731812,-0.023162842,0.0037403107,-0.017501831,0.014259338,-0.016311646,-0.010734558,-0.037597656,-0.006427765,0.08288574,0.0016403198,-0.017745972,-0.011497498,-0.022781372,0.009666443,0.023284912,-0.04852295,-0.0029144287,-0.04031372,0.017974854,-0.032989502,0.024139404,0.0011844635,0.027832031,-0.021408081,-0.059692383,-0.01171875,0.0039901733,-0.016113281,-0.066711426,-0.013954163,-0.064941406,0.0036773682,-0.0072402954,-0.027633667,0.0047721863,0.011177063,-0.015037537,-0.07849121,0.01486969,0.052581787,0.0020198822,0.028015137,-0.0073509216,0.019195557,0.017105103,-0.017333984,0.00035953522,0.031982422,-0.016693115,-0.016967773,-0.011894226,0.015075684,-0.0088272095,-0.0059165955,0.02281189,0.00083112717,0.008132935,-0.002023697,0.0079422,-0.014709473,0.025665283,-0.012557983,0.023834229,-0.0054016113,-0.012664795,0.030334473,-0.050354004,0.019195557,0.02281189,-0.003376007,0.00484848,0.031204224,0.047058105,-0.037261963,-0.022537231,0.019943237,0.0025558472,0.035339355,-0.025939941,0.048217773,0.0209198,-0.013877869,0.011405945,-0.006416321,-0.019577026,-0.029510498,-0.036987305,0.024017334,0.00447464,0.014976501,-0.008453369,0.0018539429,0.017364502,-0.00957489,0.012481689,-0.011070251,-0.016738892,-0.016113281,0.00409317,-0.004425049,0.003967285,-0.0038051605,0.02796936,0.016052246,0.035614014,0.0007100105,-0.008125305,-0.0024490356,0.03250122,-0.016021729,0.012458801,0.021774292,0.016464233,0.020935059,0.015838623,0.010429382,-0.045440674,-0.00059986115,-0.01625061,-0.013969421,0.008232117,-0.0105896,-0.012252808,0.0019760132,0.0056381226,-0.015350342,-0.028823853,0.009155273,-0.027236938,-0.023880005,-0.0038928986,-0.006526947,0.014793396,0.008460999,0.002407074,0.009521484,-0.0032157898,0.04901123,-0.010231018,-0.0063667297,0.017028809,0.026123047,0.02003479,-0.042297363,-0.014205933,-0.0128479,0.0020370483,0.0029735565,-0.029067993,0.014282227,0.038208008,-0.009979248,0.013916016,-0.0013980865,0.030776978,-0.010292053,0.00819397,-0.008605957,0.018859863,-0.00806427,0.028884888,-0.04940796,0.01725769,0.022842407,0.0022830963,-0.020248413,-0.019485474,-0.017669678,0.02609253,0.0070228577,-0.010177612,0.054107666,0.0061454773,0.019897461,-0.019592285,-0.020126343,0.00881958,-0.034210205,-0.018478394,0.023895264,-0.011932373,0.0008363724,0.010826111,-0.020812988,0.024215698,-0.0340271,0.016525269,0.000088214874,0.0023269653,-0.00008136034,-0.013908386,-0.018493652,-0.0014562607,-0.017333984,0.0071868896,0.0018539429,0.051330566,0.014373779,0.03744507,0.040252686,0.010169983,0.0049057007,-0.040130615,-0.019332886,-0.0006365776,-0.028076172,0.014450073,-0.0072135925,0.045318604,0.04257202,0.0053901672,0.02848816,0.046661377,0.043121338,0.001750946,0.011512756,-0.01890564,0.009292603,-0.0023670197,0.022537231,0.005317688,0.044799805,-0.02218628,0.02519226,0.015472412,0.034820557,-0.017990112,0.025878906,0.064208984,0.018417358,-0.0046081543,0.03591919,0.002073288,-0.0093307495,0.0022411346,-0.014450073,0.054718018,0.018707275,0.047973633,0.048797607,0.010917664,-0.0006799698,0.021118164,-0.035583496,-0.02923584,0.072021484,0.019073486,-0.024169922,-0.017364502,-0.005634308,0.013748169,-0.04574585,-0.026870728,0.015296936,0.00062179565,0.005077362,-0.01789856,-0.009025574,-0.016159058,0.004890442,0.019622803,0.01473999,-0.017562866,0.017196655,0.023971558,0.012702942,0.031982422,-0.006439209,0.028717041,-0.024597168,-0.025650024,0.017807007,0.017166138,-0.016799927,0.0009794235,0.02619934,0.0049934387,0.040161133,0.03552246,-0.011001587,0.0048599243,0.025222778,0.021911621,0.0016050339,0.058898926,0.04525757,0.017318726,0.038848877,0.03366089,0.035949707,-0.039520264,0.018295288,0.0016031265,0.011444092,-0.004432678,-0.014816284,0.011039734,-0.010154724,0.014572144,-0.0126571655,-0.020339966,0.022460938,0.023910522,-0.011566162,-0.009971619,-0.009254456,0.0042419434,-0.016693115,-0.003408432,0.010551453,-0.016571045,0.029525757,0.012077332,0.028961182,-0.022842407,0.02557373,-0.0041618347,-0.026611328,-0.0007457733,0.020324707,-0.041656494,0.0076828003,0.0021591187,-0.008117676,-0.041168213,0.003698349,0.027130127,-0.008850098,0.025314331,0.009811401,0.0017900467,0.00029230118,0.010856628,0.01651001,0.001657486,-0.014228821,-0.020446777,0.037109375,0.036712646,-0.0048332214,0.010421753,-0.015296936,-0.0012645721,0.002960205,-0.0029621124,-0.0025863647,-0.010353088,-0.024459839,-0.023452759,0.009399414,0.030838013,0.026290894,0.04473877,-0.018432617,-0.023284912,0.004463196,0.03451538,-0.0029830933,-0.00086832047,0.00022912025,0.020980835,-0.016464233,0.04699707,0.032287598,0.010414124,0.041534424,-0.012161255,-0.0033359528,0.019760132,-0.015930176,0.03390503,-0.019500732,0.0017433167,-0.010307312,0.02166748,-0.0115737915,-0.03793335,0.018508911,-0.01739502,-0.02218628,-0.025848389,0.0007367134,0.0029411316,0.03213501,0.03488159,0.021820068,-0.034576416,0.06500244,-0.008422852,0.048339844,-0.008087158,-0.018157959,0.052947998,0.032409668,0.034210205,0.01776123,0.013298035,-0.034698486,0.015197754,0.045410156,0.030471802,-0.0022525787,-0.0012350082,-0.0054016113,0.030471802,-0.003353119,0.022918701,-0.009941101,0.008880615,0.0059051514,-0.007583618,0.00044679642,-0.0013790131,-0.0035800934,-0.006580353,0.049835205,-0.021484375,-0.006538391,-0.03427124,-0.010215759,0.026504517,-0.0014286041,-0.008056641,-0.012123108,-0.023254395,0.008987427,-0.028671265,-0.027450562,0.01576233,0.018997192,-0.04776001,-0.023086548,0.009552002,0.01184082,-0.023025513,0.033721924,0.02609253,-0.0010004044,0.0074005127,0.03933716,-0.015167236,0.023620605,-0.01058197,0.019470215,0.023406982,0.0045051575,-0.020629883,-0.006416321,0.00919342,-0.008766174,0.021118164,0.033294678,-0.004234314,0.0011844635,-0.005947113,-0.009162903,-0.0055236816,-0.0036716461,-0.019180298,0.010826111,-0.012680054,-0.009635925,0.016555786,0.008773804,0.0012083054,0.018249512,-0.029510498,-0.019363403,0.009178162,0.032928467,0.027709961,-0.037994385,-0.0032844543,0.004207611,0.006729126,-0.026519775,-0.019729614,-0.010284424,-0.03161621,0.015052795,0.019195557,0.0046195984,0.020202637,-0.021240234,-0.004917145,0.027526855,-0.0008845329,0.017211914,0.003112793,-0.014930725,0.008628845,-0.013549805,-0.0046539307,-0.007297516,-0.019363403,0.0018634796,0.01914978,0.0047798157,-0.02494812,0.028930664,-0.0008997917,0.02067566,-0.0025787354,-0.013771057,0.020324707,-0.0075912476,-0.010894775,0.0031356812,0.026382446,-0.010826111,-0.0033454895,-0.016830444,0.0317688,0.047302246,-0.0103302,-0.007949829,0.0184021,0.015419006,0.01676941,0.04260254,0.021057129,0.037628174,0.018753052,-0.019454956,-0.017227173,0.022949219,-0.006866455,-0.0345459,0.015838623,-0.0029335022,-0.010658264,0.018814087,0.00894928,-0.0063056946,-0.027633667,-0.022003174,-0.012191772,-0.01675415,0.0138549805,-0.008850098,0.019332886,-0.012825012,-0.0138168335,0.006252289,-0.027709961,-0.055145264,-0.018249512,-0.003616333,-0.019592285,-0.052947998,0.0013961792,-0.034301758,0.0059013367,-0.012458801,-0.005306244,-0.021224976,0.026535034,-0.018295288,-0.005153656,0.00022423267,0.019058228,0.031799316,0.003982544,0.015350342,-0.031341553,-0.021484375,-0.02532959,0.011299133,-0.018707275,0.017745972,0.013946533,0.034729004,0.021743774,-0.015335083,0.0062942505,-0.019927979,-0.001958847,-0.013710022,-0.025268555,-0.027755737,0.020202637,0.019577026,-0.0028858185,-0.012687683,0.026031494,-0.03201294,-0.0030593872,0.028152466,0.04437256,0.0038833618,0.024993896,-0.01965332,0.004470825,-0.01600647,-0.0015668869,-0.008338928,0.00049829483,0.018035889,-0.0006890297,-0.01084137,0.0016727448,0.012825012,-0.013336182,-0.009384155,0.022491455,0.014854431,-0.01940918,0.04324341,0.0206604,0.010063171,-0.0023651123,-0.00554657,0.025405884,0.052459717,0.00831604,0.010665894,0.0041389465,0.012001038,-0.0009188652,0.005012512,0.010383606,-0.022827148,-0.04510498,-0.024124146,-0.028778076,0.02243042,0.0054130554,0.010353088,-0.0072669983,0.013282776,-0.02558899,-0.029296875,-0.015640259,0.023498535,0.011024475,-0.01828003,-0.011581421,0.00548172,0.022140503,-0.02720642,-0.0020484924,-0.026535034,-0.03616333,-0.004966736,-0.017227173,0.025787354,0.018798828,-0.0040740967,-0.0020313263,-0.002822876,-0.007965088,-0.0065574646,0.033325195,-0.018295288,-0.0008544922,0.01676941,0.0078048706,-0.023910522,0.016525269,-0.0062561035,-0.009475708,0.010292053,-0.016113281,0.015159607,-0.016708374,0.03970337,-0.002456665,0.0010919571,0.04159546,-0.000767231,0.018127441,-0.026107788,-0.0013866425,-0.0003426075,-0.0057525635,0.048675537,-0.013031006,-0.02279663,0.009765625,-0.012886047,-0.020507812,0.0023517609,0.008682251,0.03366089,-0.0038223267,0.039245605,-0.017456055,-0.007843018,0.012878418,0.020050049,-0.009979248,0.004940033,0.027313232,0.015640259,-0.005554199,-0.00554657,-0.014755249,-0.03111267,-0.007621765,0.028564453,-0.007167816,-0.009986877,0.017990112,0.012420654,0.04647827,0.0029506683,0.022338867,0.01637268,-0.0037784576,0.03262329,0.00016736984,0.05343628,-0.009887695,-0.03466797,0.004928589,-0.0050697327,-0.030700684,-0.0062828064,-0.008407593,0.0003824234,-0.03741455,0.016525269,-0.0046157837,0.03201294,-0.018341064,0.015426636,-0.028274536,0.0011901855,-0.04220581,-0.018173218,-0.040374756,0.01309967,0.023132324,-0.004840851,0.0234375,0.006629944,-0.017333984,0.027191162,0.04714966,-0.00039839745,-0.02885437,-0.012176514,0.006454468,-0.005180359,0.010299683,0.010894775,-0.0138168335,-0.017364502,-0.00299263,-0.029220581,0.007648468,-0.013511658,0.020065308,0.00356102,0.0059013367,-0.0024299622,0.029693604,0.0011749268,-0.0003912449,0.009208679,0.004753113,0.034973145,0.026947021,-0.018981934,0.022964478,0.02015686,-0.045898438,0.057495117,-0.007221222,0.032592773,-0.015686035,0.013641357,-0.038024902,-0.022079468,-0.0069274902,0.0079574585],"createdAt":"2026-04-18T18:45:22.934Z","updatedAt":"2026-04-23T08:31:13.077Z","lastSeenAt":"2026-04-23T08:31:13.077Z","tsv":"'/api':193 '/api/v1/charges/392':117 '/docs':191 '/pricing':192 '/readme':195 '/request':19,38 '0.02':18,37,99,144 '000':133 '0x8335':138 '20':132 '2913':139 '402':127 '6':148 'accept':176 'access':123,226 'across':58 'actual':228 'addit':206 'agent':238 'ai':12,31,68 'ai inference api' 'ai-inference' 'analysi':72 'analyt':62 'api':5,24,45,122,160,225 'application/json':181 'attach':168 'base':8,27,107,134,141 'base network api' 'beyond':183 'broad':50 'call':4,23 'caller':166 'catalog':51 'categori':60 'challeng':128 'classif':75 'classification' 'connect':201 'content':208 'convers':92 'data':11,30,61,65 'data analytics api' 'data-analytics' 'decim':149 'document':182,217 'embed':76 'embeddings' 'enabl':44 'endpoint':16,35,57,95,115,175,227,248 'equal':143 'estim':86 'exact':156 'exampl':220 'exchang':81 'experi':242 'export':66 'extrem':188 'feed':80 'financ':13,32,77 'finance-data' 'format':237 'four':59 'gas':85 'generat':93 'generic':247 'geocod':90 'geocoding' 'given':145 'header':173 'infrastructur':88 'input':233 'insight':67 'key':161 'know':231 'land':185 'learn':70 'limit':164 'list':119 'low payment fee' 'lowpaymentfee.com':39 'machin':69 'made':152 'metric':63 'micropayment api' 'name':249 'need':240 'network':108 'offer':10,29 'openapi':212 'output':236 'page':186,196 'paramet':234 'pay':2,21,54 'pay per call api' 'pay-per-cal':1,20 'pay-per-request':53 'payabl':102 'payment':150,172 'per':3,22,55,100 'platform':6,25,46 'post':177 'premium':121,224 'price':79,97 'prompt':203 'protocol':112 'provid':48 'quot':84 'rate':82,163 'reli':244 'render':198 'report':64 'request':56,101,129,178 'request/response':215 'requir':165 'return':125,180,229 'schema':216 'scheme':157 'sentiment':71 'sentiment-analysis' 'simpli':167 'spars':189 'spec':213 'specif':114 'summar':74 'technic':207 'text':73 'text-summarization' 'token':83 'unit':135 'usdc':9,28,104,137,146 'usdc api' 'usdc-base' 'util':15,34,89 'utility-apis' 'valid':91 'via':109,153 'wallet':202 'web3':78 'without':230 'x':171 'x-payment':170 'x402':43,111,155 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"073730ed-f493-4219-8576-01e6be14f985","listingId":"61877e11-645e-49cb-81f0-4a32a6daee52","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/392","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:22.934Z"}],"sources":[{"listingId":"61877e11-645e-49cb-81f0-4a32a6daee52","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/392","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:22.934Z","lastSeenAt":"2026-04-23T08:31:13.077Z"}],"details":{"listingId":"61877e11-645e-49cb-81f0-4a32a6daee52","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/392 \\\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 platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge for /api/v1/charges/392 requests maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/charges/392"}],"useCases":["Agents needing on-demand AI inference (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates via micropayments","Geocoding and data validation utilities paid per call with no subscription commitment","Exporting analytics data or generating reports on a pay-as-you-go basis"],"bestFor":["AI agents that need keyless, pay-per-call access to diverse utility endpoints","Developers prototyping with low-cost API calls without subscription overhead","Web3-native applications already operating on the Base network with USDC"],"notFor":["High-volume production workloads where per-request pricing at $0.02 adds up quickly","Users who need detailed API documentation, request schemas, or guaranteed SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:21.78Z"},"updatedAt":"2026-04-23T08:31:13.077Z"}}