{"id":"0c7be159-c5fe-4aa3-83e9-aab2614d16eb","shortId":"QTTQsv","kind":"x402","title":"Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/charges/10` is listed as \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, no subscriptions, just an X-PAYMENT header with each request.\n\nThe platform advertises four endpoint 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 listed at the same $0.02/request price point. The site claims no rate limits, no API keys required, and instant access.\n\nHowever, documentation is essentially absent — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no actual technical documentation, request/response schemas, or usage examples. It is unclear what request body the `/api/v1/charges/10` endpoint expects or what it returns. The endpoint name \"Premium API Access\" and the path `/charges/10` do not clearly map to any of the advertised API categories, making its actual functionality uncertain.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","embeddings","finance-data","geocoding","no-api-key"],"categories":["api-platform","llm","finance","geo"],"synonyms":["pay per call API","x402 API","USDC API","micropayment API","Base network API","low fee API","crypto API payments"],"warnings":["No documentation available — /docs, /api, /pricing, /README all show only 'Connect wallet'","The endpoint path /api/v1/charges/10 does not clearly correspond to any of the advertised API categories","No request body schema or response schema is documented; callers cannot know what to send or expect back","No OpenAPI spec, no ai-plugin manifest, no agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/10","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and the specific endpoint's purpose ('Premium API Access' at /charges/10) is ambiguous. All doc pages return only 'Connect wallet' with no content.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T03:16:37.932Z","embedding":[-0.020645142,-0.027252197,0.040802002,0.018753052,0.020065308,-0.022735596,-0.034057617,0.029525757,0.07446289,-0.0637207,0.017547607,-0.046813965,-0.029083252,-0.039367676,-0.0146865845,0.010803223,-0.006526947,0.010025024,-0.028717041,0.042999268,0.0065612793,-0.01727295,-0.02482605,0.015548706,-0.0052719116,-0.02508545,0.005657196,-0.014907837,-0.026855469,-0.028945923,0.04751587,-0.022827148,-0.008956909,0.007144928,-0.013214111,-0.016799927,-0.016571045,0.035949707,0.03225708,-0.0012807846,-0.007347107,-0.048187256,-0.0021514893,-0.022598267,-0.059783936,-0.013664246,0.014892578,-0.005596161,0.014556885,0.016036987,-0.04849243,-0.0054359436,-0.016601562,0.014472961,0.012413025,0.024032593,-0.00048470497,-0.0017261505,0.007282257,0.008377075,0.007637024,-0.06262207,-0.019104004,0.0004925728,-0.011108398,0.053497314,-0.006427765,0.038513184,-0.004852295,0.046661377,0.040283203,0.03173828,0.032806396,0.007484436,0.009056091,0.0025081635,-0.002368927,0.055511475,-0.018661499,-0.0024147034,-0.021209717,0.0058403015,-0.050323486,-0.011940002,-0.021896362,-0.043273926,-0.024871826,0.009048462,-0.043518066,0.024154663,-0.062683105,-0.00856781,-0.008880615,0.0076560974,0.014434814,-0.007217407,0.004486084,0.027404785,-0.014434814,0.01727295,-0.0062713623,-0.047302246,0.011581421,0.01626587,0.0446167,0.039520264,0.021408081,0.016052246,-0.0018110275,-0.009132385,-0.03933716,0.0126571655,-0.02204895,-0.008049011,0.0020618439,0.011856079,-0.021850586,0.017303467,-0.033599854,-0.0047454834,-0.05114746,0.044769287,0.038238525,-0.0026950836,0.018417358,-0.040161133,-0.021026611,0.0143966675,-0.03186035,-0.01965332,0.01448822,0.012901306,0.03503418,-0.022659302,-0.020309448,-0.010513306,-0.022857666,-0.012924194,-0.040985107,-0.041870117,0.036376953,-0.02230835,0.029296875,0.03933716,-0.103393555,-0.003622055,-0.037078857,0.000667572,-0.0345459,-0.006336212,-0.013664246,0.030776978,-0.025619507,-0.025558472,-0.009849548,-0.014320374,-0.0021858215,0.027404785,-0.02947998,0.034454346,-0.030380249,0.026321411,0.01007843,-0.0050086975,0.020233154,0.02494812,-0.0093307495,-0.091674805,-0.090026855,-0.021530151,-0.01927185,-0.033966064,-0.031707764,-0.008361816,-0.012199402,-0.05407715,-0.0079574585,-0.0050964355,0.0031909943,-0.03253174,-0.0006322861,-0.020584106,0.01902771,-0.014602661,-0.06573486,-0.02079773,-0.018936157,0.07446289,0.020614624,0.031341553,0.02809143,-0.0090789795,0.06335449,0.03253174,-0.03149414,-0.019744873,0.016326904,-0.008834839,0.01727295,-0.016571045,0.0027618408,-0.041046143,0.03604126,0.06506348,0.011329651,-0.006374359,-0.018173218,-0.0501709,-0.04852295,-0.04876709,0.019577026,0.006931305,-0.0019388199,0.047790527,-0.04815674,-0.044799805,-0.025253296,0.016586304,0.008476257,0.06628418,0.023956299,0.00035834312,0.011543274,0.010925293,-0.04776001,0.03125,0.02619934,0.0029125214,-0.016204834,-0.032989502,0.025848389,0.03982544,-0.01737976,0.017333984,-0.021331787,0.00969696,0.0077934265,0.014434814,0.021484375,0.0008673668,-0.028305054,-0.011680603,-0.039520264,0.020263672,0.010063171,-0.036987305,-0.03427124,-0.08465576,0.060150146,0.021911621,0.05206299,-0.010414124,0.0206604,-0.011650085,-0.005554199,-0.078186035,0.0592041,0.08154297,0.011695862,-0.017562866,0.008544922,0.008491516,-0.01727295,0.015220642,-0.0053634644,-0.03970337,-0.026062012,0.008041382,-0.054138184,-0.0038051605,0.021392822,0.020599365,0.05532837,-0.013092041,-0.050109863,-0.014785767,-0.0013084412,-0.005874634,-0.021224976,0.0069122314,-0.016708374,0.018463135,0.01902771,-0.0010404587,0.016159058,0.0021209717,0.012664795,-0.0028152466,-0.0020771027,-0.013641357,-0.021072388,-0.0024356842,-0.011672974,-0.057647705,0.015037537,-0.0009756088,0.07287598,-0.034484863,0.04550171,-0.0063705444,0.024505615,0.047943115,-0.0070152283,-0.04714966,0.017303467,0.029754639,0.006626129,0.037078857,0.004863739,-0.03652954,0.0013885498,0.067993164,0.0033302307,-0.0061302185,-0.013877869,0.00034332275,0.027542114,-0.014305115,-0.068115234,-0.038116455,-0.002998352,-0.034240723,0.025238037,-0.02003479,0.010284424,-0.01348114,0.009376526,-0.017669678,0.0031394958,-0.027023315,0.021697998,-0.020050049,0.015975952,-0.014923096,-0.025634766,0.022232056,0.007446289,-0.009880066,0.00018978119,0.029891968,0.02960205,-0.01890564,-0.03970337,-0.016845703,0.0045280457,0.0023231506,0.012184143,0.01939392,0.030181885,0.055755615,-0.03074646,0.010528564,0.022537231,0.01197052,0.032226562,-0.009727478,-0.011787415,-0.06726074,-0.051513672,-0.034362793,-0.02949524,0.02520752,0.015670776,-0.0000013113022,0.04434204,0.0048942566,-0.037322998,-0.028167725,0.023849487,-0.0413208,0.0064964294,0.027770996,-0.0022945404,-0.03842163,-0.015235901,-0.013626099,-0.01448822,0.033050537,-0.0035266876,0.016281128,0.06347656,0.037597656,0.0015649796,0.03387451,0.016296387,0.027282715,0.010719299,-0.03488159,-0.023834229,0.000037789345,0.034301758,-0.02645874,-0.03253174,-0.070251465,0.054718018,0.038970947,0.07501221,0.013900757,0.008514404,0.021240234,-0.006580353,0.012252808,-0.038360596,-0.010879517,-0.016189575,-0.049865723,0.039215088,-0.02571106,-0.0016889572,-0.022232056,0.061920166,-0.0119018555,0.018081665,-0.02458191,0.041412354,-0.008377075,0.008049011,0.014556885,0.01260376,0.04714966,0.06933594,-0.05392456,0.015075684,0.033843994,-0.04159546,-0.0005683899,0.061553955,-0.015808105,-0.024459839,-0.068481445,-0.027511597,0.0007119179,-0.004211426,-0.055603027,0.0012979507,0.01713562,0.01586914,0.028198242,-0.0021362305,-0.016693115,-0.01133728,-0.024810791,-0.05999756,0.005256653,-0.037841797,-0.0005350113,0.03930664,-0.029083252,-0.0033931732,-0.007335663,-0.013267517,0.0013313293,0.0027313232,0.036346436,-0.0065193176,-0.049438477,0.052581787,0.01687622,-0.0043945312,0.0042686462,0.039093018,0.021697998,0.023101807,0.07104492,0.0068130493,-0.031036377,-0.07165527,0.032806396,-0.047851562,0.0070610046,0.007484436,-0.028198242,-0.0063819885,-0.0047416687,-0.043548584,-0.030029297,-0.0015802383,-0.021881104,0.007843018,0.005760193,-0.021392822,-0.026184082,-0.046966553,-0.004676819,-0.0019321442,0.076538086,0.010101318,-0.010612488,-0.06161499,-0.0005245209,0.02279663,0.004058838,0.052001953,-0.014328003,-0.035705566,-0.009933472,-0.048706055,0.0010986328,-0.025405884,0.020111084,-0.0034103394,-0.009628296,0.030548096,0.002500534,0.00667572,-0.00007659197,0.014694214,0.041809082,-0.04458618,-0.015350342,-0.021255493,0.034729004,-0.0013418198,0.0025939941,-0.04067993,0.036193848,0.019042969,0.031433105,-0.034240723,0.006023407,-0.0049934387,0.004299164,0.027328491,-0.0112838745,-0.016113281,-0.010108948,-0.047729492,-0.026306152,0.027282715,-0.023849487,0.029937744,0.013877869,0.0014686584,0.017349243,-0.019042969,0.01461792,0.010070801,-0.027145386,0.004764557,-0.020263672,-0.035705566,-0.015853882,-0.003566742,-0.012275696,0.031921387,-0.0154953,0.020843506,-0.0021247864,-0.020935059,0.029937744,0.019821167,-0.005130768,0.02293396,0.0009088516,0.022445679,0.050079346,0.011390686,-0.049041748,0.028793335,-0.012023926,0.01928711,-0.020187378,0.043151855,0.03314209,-0.012519836,-0.0023937225,-0.007785797,-0.017364502,-0.016494751,0.0013208389,0.014328003,0.013969421,-0.010597229,-0.059143066,0.03314209,0.006778717,-0.027511597,-0.028015137,0.01725769,0.0121154785,-0.033325195,0.024475098,0.019439697,0.057159424,-0.026138306,0.010154724,0.017303467,0.03475952,0.03604126,0.010955811,-0.004814148,0.009986877,-0.009033203,0.004753113,-0.012786865,0.00932312,0.026611328,-0.008522034,0.01939392,0.027877808,0.02279663,-0.016403198,-0.024215698,0.013191223,-0.016693115,-0.018951416,0.020309448,0.019378662,0.017547607,-0.02709961,0.0262146,0.012641907,-0.022888184,-0.011238098,0.009590149,0.037719727,-0.027297974,-0.018814087,0.019958496,-1.1920929e-7,0.026168823,-0.05331421,-0.0016050339,0.014472961,0.018371582,-0.02230835,-0.040130615,-0.043121338,0.027282715,0.026657104,0.011360168,0.028213501,0.047821045,0.008102417,0.00806427,0.026611328,0.002828598,-0.028930664,-0.009857178,-0.044891357,-0.02508545,-0.006866455,0.0023117065,-0.039886475,0.013282776,-0.01461792,-0.04714966,0.0033779144,-0.005748749,-0.009284973,0.0021305084,0.013427734,0.04324341,0.002231598,0.017486572,-0.014564514,-0.033081055,-0.0058135986,-0.017089844,0.02444458,-0.049316406,0.008834839,-0.0061187744,-0.012687683,0.01096344,0.008201599,0.019470215,0.026473999,0.009941101,0.029129028,-0.050598145,0.053253174,-0.039367676,0.027908325,0.013694763,-0.04751587,-0.009567261,-0.03387451,-0.007369995,0.034240723,-0.023376465,-0.010253906,-0.032806396,-0.023117065,-0.002401352,-0.054504395,0.019073486,0.03869629,0.04324341,-0.016220093,0.005554199,0.0007901192,-0.0029907227,-0.021377563,-0.00078105927,-0.012229919,0.010398865,0.021850586,0.013755798,-0.009353638,-0.02519226,-0.022842407,0.0090789795,-0.05291748,-0.05596924,-0.00014305115,0.0058250427,-0.010818481,-0.023483276,-0.02017212,-0.038330078,-0.0030879974,-0.048950195,0.013824463,0.0077400208,0.027328491,0.0055122375,-0.016845703,0.004196167,0.011917114,-0.017593384,0.03668213,-0.003042221,-0.0009217262,-0.02835083,0.0024719238,0.03543091,0.014060974,0.0008597374,-0.009460449,-0.013191223,-0.016845703,-0.048675537,0.0054855347,-0.0065193176,-0.017349243,-0.014633179,0.0084991455,-0.04425049,-0.0019950867,-0.017959595,0.000521183,0.029815674,0.017074585,0.0048561096,-0.009513855,0.009338379,-0.0033607483,-0.011367798,-0.02166748,0.028717041,0.010787964,0.00039243698,0.023361206,0.038726807,0.0030155182,-0.01751709,-0.008956909,0.0045547485,0.018585205,-0.033966064,0.01209259,-0.019760132,0.015853882,-0.021133423,-0.010932922,-0.032226562,-0.0013132095,0.072265625,-0.0034332275,-0.026931763,-0.004337311,-0.015945435,0.008842468,0.011276245,-0.051361084,-0.0025253296,-0.045135498,0.019042969,-0.026260376,0.018951416,-0.00248909,0.019515991,-0.02897644,-0.05633545,-0.007980347,0.0046463013,-0.0158844,-0.066589355,-0.012229919,-0.06945801,0.0042419434,0.005874634,-0.021362305,0.009590149,-0.0012311935,-0.010574341,-0.07183838,0.018539429,0.043914795,0.006378174,0.024810791,-0.014320374,0.022659302,0.023742676,-0.015670776,0.0015268326,0.040802002,-0.01612854,-0.007484436,-0.007282257,0.008804321,-0.010398865,-0.009597778,0.0115737915,0.017578125,0.010055542,-0.0052833557,0.012359619,-0.0038928986,0.029663086,-0.0126571655,0.017532349,-0.0044898987,-0.015403748,0.0368042,-0.04714966,0.032104492,0.020080566,-0.000813961,0.011306763,0.02609253,0.041748047,-0.02798462,-0.015113831,0.017166138,0.0047912598,0.03375244,-0.025344849,0.046081543,0.027542114,-0.024658203,0.019577026,-0.007965088,-0.014434814,-0.031097412,-0.030441284,0.02293396,0.008758545,0.011833191,-0.012374878,0.012832642,0.018173218,-0.019317627,0.012062073,-0.010261536,-0.012756348,-0.011146545,0.004020691,0.00041270256,0.010765076,-0.010353088,0.018737793,0.009170532,0.035705566,0.00025343895,0.00035905838,0.0010671616,0.027328491,-0.012710571,0.011222839,0.021072388,0.015426636,0.027770996,0.021499634,0.011924744,-0.041290283,-0.005443573,-0.024871826,-0.008155823,-0.0008983612,-0.012062073,-0.0053901672,0.0019073486,0.0034713745,-0.018936157,-0.0357666,0.004348755,-0.024475098,-0.021377563,-0.0023899078,0.00037670135,0.020965576,0.0075912476,-0.000073969364,0.0115737915,-0.00027012825,0.055023193,-0.0121536255,0.007171631,0.016479492,0.025421143,0.021652222,-0.03842163,-0.007926941,-0.01210022,0.005302429,0.0020065308,-0.02166748,0.013923645,0.042053223,-0.014099121,0.013511658,-0.010612488,0.025390625,-0.0073432922,0.010284424,-0.016357422,0.01612854,-0.012901306,0.024963379,-0.0413208,0.019485474,0.01537323,0.0007209778,-0.0074806213,-0.020126343,-0.020614624,0.021514893,-0.0019025803,-0.006175995,0.051116943,0.0012292862,0.021697998,-0.018936157,-0.0158844,0.014320374,-0.030563354,-0.024032593,0.032562256,-0.0063819885,0.005420685,-0.0036392212,-0.029388428,0.024612427,-0.035003662,0.014381409,-0.0046958923,0.0058631897,-0.0027008057,-0.010169983,-0.02456665,-0.0012950897,-0.0093307495,0.014778137,0.0031738281,0.04510498,0.0052452087,0.0423584,0.051849365,0.01197052,0.0034942627,-0.0390625,-0.025024414,-0.012512207,-0.025115967,0.015464783,-0.002149582,0.040618896,0.04296875,0.002275467,0.036499023,0.042114258,0.037384033,0.001964569,0.012687683,-0.020690918,0.0037326813,0.001250267,0.030700684,0.006778717,0.035308838,-0.011016846,0.026123047,0.008651733,0.032043457,-0.030410767,0.03225708,0.06933594,0.01651001,-0.0031604767,0.027877808,-0.00027275085,-0.014778137,-0.0054740906,-0.019699097,0.06317139,0.021652222,0.05496216,0.054351807,0.0064849854,-0.008232117,0.012863159,-0.031341553,-0.019561768,0.08074951,0.010383606,-0.02911377,-0.013534546,-0.0055122375,0.009109497,-0.040802002,-0.026123047,0.014015198,-0.0045433044,0.004787445,-0.018127441,-0.005218506,-0.019439697,0.011436462,0.017623901,0.008804321,-0.010917664,0.018920898,0.024673462,0.013259888,0.027069092,-0.0034236908,0.027328491,-0.022750854,-0.027572632,0.009002686,0.012184143,-0.017852783,-0.006702423,0.027023315,0.00049066544,0.03881836,0.031143188,-0.018356323,0.003074646,0.027801514,0.0209198,-0.010444641,0.048950195,0.049591064,0.011665344,0.031204224,0.035888672,0.039398193,-0.034088135,0.026657104,0.0075912476,0.0070228577,0.00027608871,-0.018493652,0.0018815994,-0.0037822723,0.012069702,-0.015037537,-0.018875122,0.020324707,0.030838013,-0.012550354,-0.002538681,-0.007648468,0.0037231445,-0.010650635,-0.0048828125,0.012176514,-0.012374878,0.027511597,0.01725769,0.023727417,-0.027542114,0.020523071,-0.012008667,-0.017120361,-0.0076828003,0.018051147,-0.039978027,0.010406494,-0.0031585693,-0.009788513,-0.04360962,0.013664246,0.020843506,-0.009529114,0.02772522,0.013000488,-0.0030078888,-0.0017700195,0.005996704,0.00894165,-0.00017988682,-0.014381409,-0.010910034,0.04067993,0.040618896,-0.002216339,0.014968872,-0.023345947,-0.0055885315,-0.002658844,0.0032043457,-0.01335907,-0.004962921,-0.02986145,-0.008979797,0.02079773,0.02947998,0.03062439,0.048858643,-0.012535095,-0.022491455,0.005168915,0.02444458,0.007106781,0.0055885315,0.0070495605,0.014251709,-0.006931305,0.04309082,0.029556274,0.014465332,0.034423828,-0.009941101,-0.004283905,0.014694214,-0.015571594,0.032928467,-0.015090942,0.014198303,-0.015823364,0.024093628,-0.0184021,-0.039001465,0.013366699,-0.016494751,-0.018478394,-0.023971558,0.0018062592,0.0043029785,0.029266357,0.033599854,0.018493652,-0.023086548,0.06088257,-0.008666992,0.058898926,0.0074806213,-0.021575928,0.0440979,0.037963867,0.030441284,0.018371582,0.0129852295,-0.038208008,0.015930176,0.049346924,0.033843994,-0.0028324127,-0.00025701523,-0.0048828125,0.03152466,-0.003932953,0.021881104,-0.015220642,0.007785797,0.008071899,-0.004169464,-0.0026664734,0.0017623901,0.0030593872,0.0049819946,0.04421997,-0.016494751,-0.016204834,-0.032348633,-0.004463196,0.030258179,-0.0038547516,0.002532959,-0.014472961,-0.026779175,0.011039734,-0.03048706,-0.029663086,0.0107421875,0.021469116,-0.046020508,-0.029205322,0.005947113,0.010261536,-0.015853882,0.026306152,0.023117065,-0.011192322,0.006164551,0.031921387,-0.01701355,0.029006958,-0.0052337646,0.017654419,0.027389526,0.0051231384,-0.01386261,-0.007987976,0.005054474,-0.013305664,0.014877319,0.038146973,-0.005279541,0.010192871,-0.004764557,-0.013267517,-0.007282257,-0.008460999,-0.017608643,0.013679504,-0.0048828125,-0.002445221,0.0007662773,-0.00059986115,-0.00088119507,0.0071907043,-0.044158936,-0.022491455,0.0052719116,0.02355957,0.026748657,-0.035705566,-0.0029277802,0.0058937073,0.0028095245,-0.026992798,-0.0284729,-0.022125244,-0.022033691,0.020339966,0.023483276,0.009902954,0.018478394,-0.01979065,-0.007621765,0.017791748,-0.0038204193,0.013648987,0.008850098,-0.018539429,-0.0007686615,-0.013534546,-0.015419006,-0.005973816,-0.0154953,0.005935669,0.014137268,0.011421204,-0.018875122,0.030151367,-0.00033545494,0.022567749,0.002111435,-0.01651001,0.013832092,-0.018157959,-0.010749817,0.0061416626,0.01676941,-0.012969971,-0.005924225,-0.013824463,0.030563354,0.053619385,0.0009899139,-0.012588501,0.023742676,0.0029697418,0.023651123,0.04663086,0.01940918,0.037109375,0.018341064,-0.01486969,-0.013267517,0.0151901245,-0.004562378,-0.022491455,0.02078247,0.0033359528,-0.0037002563,0.014907837,0.009162903,-0.0058631897,-0.017333984,-0.015670776,-0.01096344,-0.012207031,0.014801025,-0.002998352,0.0340271,-0.01625061,-0.011528015,0.0013484955,-0.025390625,-0.061920166,-0.0234375,-0.0035438538,-0.0073547363,-0.049865723,-0.0025196075,-0.039154053,0.011444092,-0.028762817,-0.0006661415,-0.01675415,0.028503418,-0.02230835,0.008972168,-0.006187439,0.017593384,0.01927185,0.0102005005,0.014472961,-0.033355713,-0.026153564,-0.0143585205,0.0015897751,-0.011619568,0.013977051,0.019012451,0.03543091,0.02330017,-0.00869751,0.0017347336,-0.01626587,-0.0010681152,-0.0030117035,-0.026412964,-0.02003479,0.021331787,0.020614624,-0.01197052,-0.013061523,0.01739502,-0.026641846,0.00070238113,0.022216797,0.04296875,0.007686615,0.021728516,-0.020233154,0.0056114197,-0.012893677,-0.0059814453,-0.00655365,0.009963989,0.010353088,0.0065078735,-0.0027122498,0.003271103,0.011390686,-0.010307312,-0.0140686035,0.018875122,0.011451721,-0.022705078,0.03717041,0.014923096,0.010734558,-0.006526947,-0.011474609,0.026855469,0.049957275,0.0105896,0.012130737,0.004146576,0.004585266,-0.0017051697,0.011154175,0.012794495,-0.023162842,-0.04525757,-0.028274536,-0.015823364,0.010543823,0.0028457642,0.022262573,-0.0052108765,0.023025513,-0.022842407,-0.023452759,-0.026275635,0.02671814,0.0038967133,-0.018508911,-0.02217102,0.0042762756,0.026779175,-0.027404785,0.0014915466,-0.030334473,-0.022079468,0.0010080338,-0.025299072,0.023208618,0.006378174,0.0013580322,0.0009560585,-0.011192322,0.00048017502,-0.0046653748,0.03451538,-0.014892578,0.013877869,0.02305603,0.01838684,-0.019485474,0.01966858,0.00022315979,-0.0012292862,0.008712769,-0.020080566,0.013366699,-0.02027893,0.039764404,-0.004623413,-0.00019836426,0.044525146,0.00017988682,0.01966858,-0.026855469,0.0019140244,-0.0016832352,-0.013496399,0.047088623,-0.020736694,-0.014511108,0.017532349,-0.017059326,-0.02482605,-0.0036125183,0.017486572,0.039001465,-0.012466431,0.046569824,-0.016937256,-0.001660347,0.0049972534,0.017959595,-0.014816284,0.0029277802,0.020751953,0.021514893,-0.0029010773,-0.004043579,-0.016357422,-0.032714844,-0.01033783,0.02015686,-0.008720398,-0.009788513,0.007896423,0.010787964,0.043060303,0.008842468,0.016815186,0.017822266,-0.001876831,0.034179688,-0.0022792816,0.056427002,-0.0034294128,-0.03036499,0.0004925728,-0.004207611,-0.017364502,-0.005935669,-0.004875183,-0.0031147003,-0.030258179,0.019363403,-0.014381409,0.03262329,-0.020141602,0.016647339,-0.023345947,-0.00011461973,-0.04638672,-0.018661499,-0.035308838,0.01448822,0.027404785,-0.007209778,0.01977539,0.005065918,-0.010482788,0.02078247,0.050689697,-0.0070762634,-0.026473999,-0.010055542,0.010467529,-0.010299683,0.018493652,0.02418518,-0.010520935,-0.01234436,0.008415222,-0.032989502,0.01612854,-0.0011949539,0.01600647,0.003282547,0.00617218,-0.013389587,0.031097412,-0.006576538,-0.0038051605,0.0066184998,0.007255554,0.04156494,0.028945923,-0.0115737915,0.023208618,0.011154175,-0.033203125,0.062072754,0.0007996559,0.038604736,-0.016525269,0.006477356,-0.030807495,-0.021835327,-0.0031604767,0.010574341],"createdAt":"2026-04-18T18:44:07.899Z","updatedAt":"2026-04-23T11:03:19.385Z","lastSeenAt":"2026-04-23T11:03:19.385Z","tsv":"'/api':185 '/api/v1/charges/10':69,214 '/charges/10':230 '/docs':184 '/pricing':186 '/readme':188 '/request':19,38,162 '0.02':18,37,80,161 '000':86 '20':85 '6':92 'Base network API' 'USDC API' 'absent':182 'access':75,177,226 'actual':199,244 'advertis':117,239 'ai':12,31,128 'ai-inference' 'analysi':132 'analyt':122 'api':5,24,45,74,102,172,225,240 'base':8,27,63,87 'base-network' 'bodi':212 'broad':50 'call':4,23,82 'catalog':51 'categori':120,241 'claim':167 'classif':135 'clear':233 'connect':194 'convers':152 'cost':77 'cover':10,29 'crypto API payments' 'data':11,30,121,125 'data-analytics' 'decim':93 'document':179,201 'embed':136 'embeddings' 'enabl':44 'endpoint':16,35,57,67,119,155,215,222 'essenti':181 'estim':146 'exampl':206 'exchang':141 'expect':216 'export':126 'feed':140 'financ':13,32,137 'finance-data' 'four':118 'function':245 'gas':145 'generat':153 'geocod':150 'geocoding' 'handl':96 'header':111 'howev':178 'infrastructur':148 'insight':127 'instant':176 'key':103,173 'learn':130 'limit':170 'list':71,157 'low fee API' 'lowpaymentfee.com':39 'machin':129 'make':242 'map':234 'maxamountrequir':83 'metric':123 'micropayment API' 'name':223 'network':64 'no-api-key' 'offer':48 'page':189 'path':229 'pay':2,21,54 'pay per call API' 'pay-per-cal':1,20 'pay-per-request':53 'payment':94,110 'per':3,22,55,81 'platform':6,25,46,116 'point':164 'premium':73,224 'price':139,163 'prompt':196 'protocol':100 'quot':144 'rate':142,169 'render':191 'report':124 'request':56,114,211 'request/response':202 'requir':174 'return':220 'schema':203 'sentiment':131 'sentiment-analysis' 'settl':58 'site':166 'specif':66 'subscript':105 'summar':134 'technic':200 'text':133 'text-summarization' 'token':143 'uncertain':246 'unclear':209 'unit':88 'usag':205 'usdc':9,28,60,90 'usdc-settlement' 'util':15,34,149 'valid':151 'via':97 'wallet':195 'web3':138 'x':109 'x-payment':108 'x402':43,99 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"94589071-7d40-4969-aa89-f197fb212432","listingId":"0c7be159-c5fe-4aa3-83e9-aab2614d16eb","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:07.899Z"}],"sources":[{"listingId":"0c7be159-c5fe-4aa3-83e9-aab2614d16eb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:07.899Z","lastSeenAt":"2026-04-23T11:03:19.385Z"}],"details":{"listingId":"0c7be159-c5fe-4aa3-83e9-aab2614d16eb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/10 \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/charges/10"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/10"},{"claim":"All listed endpoints priced at $0.02/request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"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 per-call basis","Running data analytics queries and exporting data with per-request billing","Using utility services like geocoding, validation, and conversion with no subscription commitment"],"bestFor":["Agents or developers who want frictionless pay-per-call API access without signup","Crypto-native applications that can settle payments in USDC on Base","Low-volume or sporadic API consumers who don't want subscription commitments"],"notFor":["High-volume production workloads needing guaranteed SLAs and detailed documentation","Developers who need comprehensive API docs, SDKs, or request/response schema definitions before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:25.286Z"},"updatedAt":"2026-04-23T11:03:19.385Z"}}