{"id":"a455e3e9-2878-4f89-8c67-d0e74adaf520","shortId":"Ed6D3R","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, 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, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/charges/65` is labeled \"Premium API Access\" and requires a payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made via the x402 exact scheme — no API keys, no rate limits, and no subscriptions are needed. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/charges/65` endpoint specifically returns. The site's landing page lists many API paths but does not clarify whether `/api/v1/charges/65` maps to one of them or is a separate resource. Prospective users should be aware that without documentation, the actual functionality behind this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["api-marketplace","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific functionality of /api/v1/charges/65 is not described anywhere","No examples of successful responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/65","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/65","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts payments. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The actual functionality of /api/v1/charges/65 is undocumented and unclear.","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":"2026-04-19T04:06:23.339Z","embedding":[-0.014434814,-0.03692627,0.03781128,0.022964478,0.022598267,-0.028686523,-0.028442383,0.036987305,0.06762695,-0.07763672,0.020370483,-0.04336548,-0.03149414,-0.040374756,-0.024337769,0.013221741,-0.01725769,0.010108948,-0.039215088,0.02607727,0.029083252,-0.009719849,-0.012229919,0.028579712,-0.0050239563,-0.032562256,-0.0143585205,-0.014472961,-0.013008118,-0.0368042,0.021392822,-0.022705078,0.0079422,0.025756836,-0.014381409,-0.03186035,-0.019622803,0.039520264,0.03314209,-0.006439209,0.004863739,-0.06060791,-0.008964539,-0.006340027,-0.049926758,-0.011932373,0.006362915,-0.011940002,-0.0031337738,0.0063438416,-0.040649414,-0.0021705627,-0.017059326,-0.0043182373,0.012458801,0.012191772,-0.009231567,-0.011940002,0.005207062,0.008354187,0.015930176,-0.07397461,-0.013328552,-0.005302429,-0.00047826767,0.058013916,-0.0074157715,0.05227661,0.008766174,0.04852295,0.054626465,0.05218506,0.03161621,0.012535095,-0.002626419,0.009468079,0.0054779053,0.06939697,-0.019592285,-0.003873825,-0.03060913,-0.005428314,-0.04434204,-0.011070251,-0.015670776,-0.049987793,-0.01802063,0.0140686035,-0.017852783,0.017196655,-0.066101074,-0.0037384033,-0.021026611,0.00095415115,0.0073432922,0.0025157928,-0.010887146,0.024993896,-0.017684937,0.016586304,0.013282776,-0.034301758,0.0044174194,0.018035889,0.045776367,0.036834717,0.025619507,0.031036377,0.0023612976,-0.02017212,-0.02507019,0.021560669,-0.016906738,-0.025650024,0.007534027,0.019241333,-0.025131226,0.013214111,-0.036499023,0.013092041,-0.049865723,0.03552246,0.042022705,-0.0154418945,0.023651123,-0.042022705,-0.016021729,0.01209259,-0.035858154,-0.010169983,0.01878357,0.008560181,0.047821045,-0.03253174,-0.021881104,-0.0154418945,-0.020050049,-0.023117065,-0.060272217,-0.036315918,0.037597656,-0.036743164,0.036956787,0.035888672,-0.10644531,-0.015960693,-0.0440979,0.010032654,-0.040618896,-0.0063667297,-0.010536194,0.030090332,-0.018447876,-0.01663208,-0.020721436,-0.018341064,-0.003944397,0.030090332,-0.025619507,0.05441284,-0.011116028,0.034057617,0.01235199,-0.00077962875,0.025253296,0.031173706,-0.011360168,-0.068237305,-0.08227539,-0.026672363,-0.012794495,-0.022994995,-0.034362793,-0.005596161,-0.009933472,-0.064086914,-0.024856567,-0.016586304,0.00064468384,-0.016937256,0.0071372986,-0.017303467,0.014343262,-0.010040283,-0.06549072,-0.014778137,-0.014846802,0.08477783,0.022567749,0.017959595,0.02961731,-0.011795044,0.060333252,0.02243042,-0.02583313,-0.034362793,0.024505615,-0.013435364,0.010345459,-0.0047340393,-0.004550934,-0.03390503,0.035705566,0.0635376,0.021255493,-0.016799927,-0.0053253174,-0.053009033,-0.031921387,-0.04638672,0.0039711,0.00012636185,0.006580353,0.050720215,-0.024780273,-0.042236328,0.0010166168,0.010795593,0.014778137,0.050201416,0.022613525,-0.012550354,0.008796692,0.010986328,-0.03503418,0.03262329,0.03314209,0.0016908646,-0.030212402,-0.026321411,0.023406982,0.026809692,-0.044281006,0.009109497,-0.020904541,0.01184082,0.0003809929,0.024887085,0.025543213,-0.021011353,-0.027252197,-0.019882202,-0.014762878,0.031341553,0.013053894,-0.024932861,-0.046966553,-0.08282471,0.053375244,0.03488159,0.049743652,-0.0006685257,0.015975952,-0.023269653,-0.01247406,-0.067993164,0.051605225,0.084350586,-0.009254456,-0.014556885,0.010421753,-0.011672974,-0.02027893,0.00039482117,-0.0011110306,-0.03048706,-0.023010254,0.009162903,-0.047912598,0.011451721,0.012107849,0.022415161,0.058898926,-0.012794495,-0.064331055,-0.02911377,-0.0019702911,-0.004638672,-0.012672424,-0.006881714,-0.013717651,0.004360199,0.02911377,-0.0138168335,0.030670166,-0.0024490356,0.01953125,-0.007827759,-0.00970459,-0.016738892,-0.017166138,0.013175964,-0.010620117,-0.061706543,0.021896362,0.006855011,0.07342529,-0.05117798,0.03793335,-0.0043029785,0.00674057,0.06561279,-0.014701843,-0.04638672,0.015838623,0.02709961,0.019927979,0.037963867,0.010528564,-0.036010742,-0.0020275116,0.076171875,-0.015640259,-0.008117676,0.00592041,0.011100769,0.019821167,0.008148193,-0.058166504,-0.031341553,-0.0154418945,-0.032196045,0.016067505,-0.026351929,0.014541626,-0.021499634,-0.01071167,-0.023925781,0.0058135986,-0.03515625,0.028686523,-0.030273438,0.010093689,-0.012466431,-0.018035889,0.025299072,0.009254456,-0.020248413,-0.0009880066,0.033447266,0.028152466,-0.017166138,-0.04498291,-0.026275635,0.0026988983,0.0061454773,0.027313232,0.023086548,0.02961731,0.045410156,-0.032287598,0.02319336,0.027832031,0.018203735,0.03665161,-0.005886078,0.009468079,-0.06097412,-0.0552063,-0.03074646,-0.03894043,0.032714844,0.011199951,-0.0005335808,0.05407715,0.008308411,-0.010604858,-0.020126343,0.02470398,-0.04916382,-0.0067329407,0.03491211,0.002986908,-0.033355713,-0.011146545,0.0049819946,0.0043678284,0.03074646,0.0009288788,0.0011873245,0.059814453,0.038635254,-0.018661499,0.025772095,0.014465332,0.005558014,0.013175964,-0.03161621,-0.031311035,-0.003944397,0.019958496,-0.014343262,-0.011444092,-0.06347656,0.06097412,0.039642334,0.07092285,0.018035889,0.010688782,0.025466919,-0.006538391,0.010803223,-0.024963379,-0.013282776,-0.024383545,-0.048217773,0.022949219,-0.033294678,-0.015014648,-0.024383545,0.047698975,-0.0051727295,0.022918701,-0.0390625,0.051330566,-0.0019330978,-0.0050811768,0.019958496,0.017745972,0.04144287,0.06695557,-0.036621094,0.028030396,0.023269653,-0.05117798,0.0038375854,0.05407715,-0.013534546,-0.01322937,-0.062927246,-0.020004272,-0.00070619583,-0.012039185,-0.055725098,0.0014686584,0.014465332,0.02027893,0.03286743,-0.00472641,-0.028656006,0.0031375885,-0.028442383,-0.057739258,-0.007331848,-0.041168213,0.00023365021,0.057739258,-0.03024292,0.0024414062,0.003396988,-0.0055389404,-0.003921509,-0.0014533997,0.012260437,-0.00573349,-0.03793335,0.025421143,0.011161804,0.012702942,0.008392334,0.038848877,0.02670288,0.020248413,0.045776367,0.009239197,-0.02456665,-0.06347656,0.027709961,-0.0546875,0.0076675415,0.01020813,-0.01852417,-0.012611389,-0.024154663,-0.018692017,-0.032928467,-0.006526947,-0.014434814,0.005180359,0.00040459633,-0.027633667,-0.029876709,-0.057800293,-0.011764526,0.0031337738,0.07550049,0.018051147,-0.003698349,-0.05822754,-0.0070648193,0.024368286,0.00983429,0.013656616,-0.015029907,-0.017440796,-0.0063323975,-0.033691406,0.0021648407,-0.02319336,0.014595032,-0.000562191,-0.017211914,0.034118652,0.0018558502,0.014160156,-0.0029067993,0.0040245056,0.06011963,-0.025665283,-0.003168106,-0.022247314,0.03164673,-0.003232956,-0.008087158,-0.05215454,0.040252686,0.013671875,0.030197144,-0.029342651,0.0034675598,-0.0076141357,0.012283325,0.02067566,-0.009536743,-0.0079574585,-0.003921509,-0.049346924,-0.052215576,0.031951904,-0.01776123,0.016464233,0.008895874,-0.00058603287,0.025787354,0.0035190582,0.0069999695,0.023117065,-0.028900146,-0.0072250366,-0.011207581,-0.034851074,-0.00932312,-0.0013504028,-0.017745972,0.021591187,-0.020721436,0.027542114,0.0012331009,-0.023025513,0.026153564,0.00472641,0.0021839142,0.023651123,-0.00006759167,0.015464783,0.049194336,0.003572464,-0.033813477,0.029724121,-0.010566711,0.006614685,-0.0143966675,0.04486084,0.035217285,-0.014816284,-0.0011091232,-0.0049324036,-0.010658264,-0.016342163,-0.0010128021,0.011291504,0.020385742,-0.003358841,-0.049102783,0.02532959,0.012619019,-0.02470398,-0.004573822,0.0181427,0.022445679,-0.03048706,0.025161743,0.02229309,0.06317139,-0.033599854,0.0038471222,0.013130188,0.026443481,0.026229858,0.01991272,-0.018341064,0.016662598,-0.007133484,0.0074501038,-0.0023517609,0.0019235611,0.010070801,-0.013450623,0.01600647,0.018051147,0.007713318,-0.015388489,-0.02507019,0.017471313,-0.010643005,-0.019714355,0.010307312,0.026062012,0.009605408,-0.02923584,0.025894165,0.015426636,-0.020614624,-0.02116394,0.013381958,0.041900635,-0.022445679,-0.010276794,0.009262085,0.0013036728,0.041046143,-0.056152344,-0.007686615,0.015357971,0.023651123,-0.021408081,-0.034301758,-0.04345703,0.015296936,0.028396606,0.011222839,0.017959595,0.042816162,0.014724731,-0.0033397675,0.02444458,0.0029945374,-0.021911621,-0.0077590942,-0.03543091,-0.0007252693,-0.0042915344,-0.0045433044,-0.020324707,0.0055236816,-0.019317627,-0.036865234,0.0155181885,-0.01134491,-0.010955811,-0.009811401,0.021728516,0.02796936,-0.000320673,0.0058021545,-0.01398468,-0.02407837,0.0029258728,-0.0028839111,0.022109985,-0.055267334,0.0058517456,-0.022445679,-0.0006556511,0.005760193,0.011161804,0.016921997,0.025466919,0.000043988228,0.028686523,-0.039978027,0.03955078,-0.038330078,0.020355225,0.02180481,-0.048431396,-0.007850647,-0.02709961,-0.007083893,0.032073975,-0.01689148,-0.011054993,-0.02015686,-0.023880005,0.00004631281,-0.05328369,0.023498535,0.031555176,0.031311035,-0.022491455,0.006690979,-0.0063552856,-0.007507324,-0.016235352,0.002193451,-0.01953125,0.016418457,0.01663208,0.009742737,-0.026535034,-0.013374329,-0.011947632,0.004760742,-0.0463562,-0.049743652,-0.018798828,0.0077590942,-0.017791748,-0.0138168335,-0.032104492,-0.022140503,-0.004966736,-0.044708252,0.015731812,0.01600647,0.028533936,0.0012807846,-0.01763916,-0.004714966,0.010612488,-0.00730896,0.037872314,0.0030956268,-0.0067863464,-0.021713257,-0.008056641,0.033935547,0.022583008,-0.0009765625,0.0018205643,-0.005191803,-0.006210327,-0.050476074,0.0026359558,-0.006538391,0.0022144318,-0.0001322031,0.005302429,-0.046875,-0.013801575,-0.024551392,-0.0038013458,0.029876709,0.022903442,0.014793396,-0.01071167,-0.0008454323,-0.0023288727,-0.018508911,-0.02609253,0.036895752,0.010910034,0.0023899078,0.015571594,0.04055786,0.007686615,-0.0027942657,-0.0043144226,0.0008201599,0.016448975,-0.030899048,0.008285522,-0.019744873,0.011779785,-0.020767212,-0.012680054,-0.038238525,-0.010795593,0.08508301,-0.0016918182,-0.024276733,-0.008590698,-0.019989014,0.009544373,0.020065308,-0.050323486,0.0038108826,-0.039764404,0.014724731,-0.02796936,0.023864746,0.0012693405,0.016448975,-0.032196045,-0.06854248,-0.0069351196,0.003578186,-0.029769897,-0.05895996,-0.0132369995,-0.064697266,-0.005367279,0.00920105,-0.01876831,0.0013055801,0.017669678,-0.012840271,-0.079711914,0.014160156,0.04446411,0.0024032593,0.019622803,-0.008979797,0.012573242,0.023239136,-0.025817871,-0.019134521,0.031951904,-0.018798828,-0.0073051453,-0.011329651,0.008895874,-0.014015198,-0.02519226,0.025909424,0.019485474,0.013465881,-0.0009212494,0.007423401,-0.008094788,0.0062675476,-0.0074691772,0.013183594,-0.013473511,-0.0129776,0.040222168,-0.048065186,0.018188477,0.027145386,-0.0025520325,0.0016012192,0.019195557,0.040771484,-0.02998352,-0.015350342,0.027145386,-0.0033874512,0.035369873,-0.032592773,0.038482666,0.026184082,-0.021911621,0.017074585,-0.0026397705,-0.015960693,-0.03866577,-0.020950317,0.02822876,-0.00592041,0.009284973,-0.0040893555,0.010307312,0.010070801,-0.017364502,0.009376526,-0.010185242,-0.027496338,-0.004386902,0.007381439,-0.0028324127,0.010215759,-0.0062713623,0.018539429,0.0020217896,0.04135132,0.008872986,0.0011024475,0.0060272217,0.026672363,-0.014808655,0.012901306,0.017349243,0.010307312,0.028549194,0.012374878,0.01108551,-0.043518066,-0.008148193,-0.011924744,-0.0015115738,0.0038166046,-0.0035953522,-0.0115737915,-0.013946533,-0.0004901886,-0.005569458,-0.035949707,0.0073547363,-0.023727417,-0.019119263,0.0004386902,-0.007434845,0.012451172,-0.008270264,0.006214142,0.019424438,0.0029029846,0.0546875,0.00082063675,0.0055160522,0.024612427,0.03677368,0.02041626,-0.03010559,-0.013130188,-0.007209778,0.0031833649,0.0069732666,-0.024002075,0.026245117,0.04321289,-0.009902954,0.018554688,-0.010108948,0.02709961,-0.011932373,0.0129852295,-0.0066490173,0.021026611,-0.009483337,0.034973145,-0.038146973,0.006713867,0.023544312,0.003616333,-0.010009766,-0.015991211,-0.028686523,0.015586853,0.0038795471,-0.005580902,0.051116943,-0.004776001,0.016586304,-0.02407837,-0.006980896,0.0072784424,-0.03665161,-0.021469116,0.03918457,0.0037441254,-0.0021972656,0.013473511,-0.03274536,0.03515625,-0.026794434,0.022628784,-0.009239197,0.0032463074,-0.010543823,-0.015083313,-0.018417358,-0.015357971,-0.009384155,0.009475708,0.0059051514,0.04434204,0.013175964,0.035339355,0.059631348,0.014343262,0.006504059,-0.033843994,-0.025299072,-0.008735657,-0.03274536,0.015083313,0.0027065277,0.049102783,0.041931152,0.0006365776,0.028335571,0.03564453,0.025939941,0.0050735474,0.01776123,-0.014808655,0.003955841,-0.0027389526,0.025238037,0.0017776489,0.044769287,-0.014923096,0.01763916,0.014564514,0.033294678,-0.03451538,0.022247314,0.07421875,0.019058228,-0.022109985,0.038024902,0.001124382,-0.022781372,-0.012573242,-0.010643005,0.0713501,0.019744873,0.051727295,0.0524292,0.013214111,-0.008918762,0.028823853,-0.04159546,-0.027572632,0.07373047,0.023483276,-0.024261475,-0.01448822,-0.002796173,0.013427734,-0.053131104,-0.035980225,0.016113281,0.00018191338,0.0093307495,-0.0061416626,-0.0058555603,-0.020248413,0.019927979,0.022399902,0.010673523,-0.019866943,0.013153076,0.035339355,0.009689331,0.019592285,0.0009765625,0.0231781,-0.032165527,-0.020431519,0.016326904,0.013092041,-0.013710022,-0.004085541,0.020309448,0.0077056885,0.049957275,0.03778076,-0.012031555,0.013999939,0.032348633,0.024276733,-0.015159607,0.045410156,0.04815674,0.013366699,0.039031982,0.037231445,0.033355713,-0.039611816,0.020324707,0.0010175705,0.008781433,0.006313324,-0.0140686035,0.009101868,-0.013671875,0.01108551,0.0012922287,-0.020950317,0.01940918,0.029342651,0.0040740967,-0.0041618347,-0.0129852295,0.0022277832,-0.024383545,0.0019626617,0.007575989,-0.015296936,0.02456665,0.0101623535,0.02973938,-0.031433105,0.014251709,-0.005458832,-0.012512207,-0.0084991455,0.020950317,-0.036193848,-0.00078964233,-0.004600525,-0.0007982254,-0.04019165,0.015975952,0.027526855,-0.013137817,0.031951904,0.003698349,0.0011501312,0.0064735413,0.012123108,0.01033783,-0.009567261,-0.021530151,-0.013427734,0.04144287,0.042114258,0.0028762817,0.019958496,-0.013069153,-0.009353638,0.0024471283,-0.003479004,-0.00472641,-0.011070251,-0.024963379,-0.025253296,0.021438599,0.039642334,0.034484863,0.042266846,-0.0034046173,-0.026138306,-0.0014801025,0.024368286,0.009521484,0.0074043274,-0.0014305115,0.02015686,-0.010406494,0.046142578,0.02520752,0.0079193115,0.023086548,-0.021072388,-0.018173218,0.010231018,-0.010444641,0.027755737,-0.0090408325,0.001455307,-0.018447876,0.024475098,-0.01878357,-0.03173828,0.0060424805,-0.012817383,-0.013214111,-0.02458191,0.0007224083,0.014526367,0.023620605,0.04055786,0.015304565,-0.024780273,0.06695557,-0.013839722,0.057434082,-0.009597778,-0.0026760101,0.046539307,0.039215088,0.040130615,0.017730713,0.015350342,-0.038848877,0.0054473877,0.049224854,0.027008057,-0.00248909,-0.000998497,-0.011054993,0.039093018,0.0024318695,0.025772095,-0.018951416,0.0011415482,0.008285522,-0.009147644,-0.0022659302,0.0056991577,-0.0063476562,0.0009880066,0.04373169,-0.030029297,-0.011444092,-0.034851074,-0.013893127,0.02619934,0.0030460358,0.00023150444,-0.0003299713,-0.028839111,0.019439697,-0.037109375,-0.022598267,0.00504303,0.028030396,-0.03439331,-0.022537231,0.0025234222,0.011657715,-0.01725769,0.023132324,0.020126343,-0.0036029816,0.009346008,0.04537964,-0.012435913,0.031951904,-0.009254456,0.020263672,0.030136108,0.007381439,-0.01737976,0.008201599,0.013366699,-0.009376526,0.005241394,0.044128418,-0.012817383,0.0050201416,-0.009498596,-0.035888672,0.010238647,-0.00409317,-0.008682251,0.0025367737,-0.005168915,-0.0041160583,0.0010194778,0.007232666,0.0020542145,0.007434845,-0.01914978,-0.013710022,0.0030727386,0.036071777,0.031219482,-0.046325684,-0.003932953,0.008041382,0.010948181,-0.019729614,-0.012275696,-0.009223938,-0.028762817,0.017074585,0.0072250366,0.004211426,0.013801575,-0.015335083,-0.0037155151,0.028717041,0.012542725,0.023529053,0.012817383,-0.0021953583,0.018936157,-0.023010254,-0.0078125,-0.0015687943,-0.0104599,0.010818481,0.016311646,-0.0010766983,-0.025665283,0.029953003,-0.001739502,0.017242432,0.0013666153,-0.014663696,0.0151901245,-0.017181396,-0.019058228,0.008132935,0.019241333,-0.009811401,-0.01902771,-0.024642944,0.022003174,0.052856445,-0.0012311935,-0.008087158,0.031585693,0.012435913,0.021408081,0.04034424,0.014808655,0.04537964,0.030853271,-0.015853882,-0.0076141357,0.026901245,-0.00043034554,-0.035125732,0.016052246,-0.012245178,-0.009552002,0.019927979,0.01940918,-0.00856781,-0.026748657,-0.023605347,-0.016189575,-0.018829346,0.020339966,-0.012718201,0.018493652,-0.0099105835,-0.010063171,-0.0039749146,-0.016525269,-0.04916382,-0.030136108,-0.007209778,-0.0115356445,-0.04421997,0.014579773,-0.038330078,0.017456055,-0.0143585205,-0.010314941,-0.018203735,0.028717041,-0.018035889,-0.0022335052,0.004798889,0.0146865845,0.018600464,0.019638062,0.012741089,-0.031341553,-0.028549194,-0.023864746,-0.0040779114,-0.011787415,0.016784668,0.018051147,0.038604736,0.019439697,-0.0043792725,-0.00642395,-0.008277893,0.0033302307,-0.0034599304,-0.029556274,-0.0053749084,0.01939392,0.019195557,-0.016189575,-0.00919342,0.034576416,-0.03894043,-0.011009216,0.021270752,0.04522705,0.01134491,0.021453857,-0.023635864,-0.0010538101,-0.015655518,-0.002861023,-0.01763916,0.010505676,0.01071167,0.0056266785,-0.008110046,0.0016345978,0.023590088,-0.0068130493,-0.018844604,0.016220093,-0.00028657913,-0.01939392,0.030899048,0.0154800415,0.018356323,-0.0050621033,-0.011711121,0.02519226,0.03366089,0.015068054,0.0046691895,0.002779007,0.014503479,-0.008544922,0.013389587,0.015640259,-0.016418457,-0.036132812,-0.020309448,-0.02861023,0.0151901245,0.016113281,0.027496338,-0.0031604767,0.011756897,-0.031555176,-0.025299072,-0.018432617,0.018554688,-0.0022563934,-0.013031006,-0.00774765,0.001865387,0.026672363,-0.0284729,0.0003068447,-0.02458191,-0.020126343,-0.004043579,-0.024124146,0.028152466,0.023010254,-0.008384705,-0.005252838,-0.0015478134,-0.0034675598,-0.006095886,0.033477783,-0.018814087,-0.0008816719,0.017242432,0.016693115,-0.026321411,0.009094238,-0.007774353,-0.0036029816,0.021057129,-0.01625061,0.010154724,-0.017166138,0.042877197,0.004386902,-0.0075149536,0.033325195,-0.0035190582,0.015975952,-0.02017212,0.011741638,0.004043579,0.00088071823,0.03543091,-0.017105103,-0.018249512,0.008491516,-0.020858765,-0.023910522,0.0049743652,0.02897644,0.044952393,-0.0049934387,0.04208374,-0.020996094,-0.018341064,0.005886078,0.0045928955,-0.017349243,-0.008232117,0.031799316,0.014511108,-0.015670776,-0.0088272095,-0.017807007,-0.03665161,-0.0066223145,0.025939941,0.0015115738,-0.008102417,0.010528564,0.006919861,0.046569824,0.010269165,0.019882202,0.020584106,0.0058288574,0.02015686,-0.00025177002,0.051208496,-0.00843811,-0.028717041,0.008010864,-0.0070724487,-0.020446777,-0.019546509,-0.013404846,0.0002220869,-0.042144775,0.025360107,-0.010810852,0.045196533,-0.028213501,0.0061149597,-0.023986816,-0.004825592,-0.035308838,-0.019088745,-0.021743774,0.015319824,0.036376953,-0.0073890686,0.02180481,0.011703491,-0.021255493,0.017044067,0.050201416,-0.0056114197,-0.019622803,-0.0019283295,0.03189087,-0.0015687943,0.008880615,0.010116577,-0.0076675415,-0.0256958,0.0020961761,-0.024871826,0.008956909,-0.004600525,0.010803223,0.0038661957,-0.002292633,-0.003522873,0.032226562,0.0072898865,-0.0051460266,0.0070343018,0.012664795,0.04699707,0.039794922,-0.007507324,0.031799316,0.024490356,-0.03137207,0.057647705,-0.0016021729,0.031921387,-0.018707275,-0.0067596436,-0.033813477,-0.023773193,-0.012924194,0.0070114136],"createdAt":"2026-04-18T18:45:41.037Z","updatedAt":"2026-04-23T01:01:25.105Z","lastSeenAt":"2026-04-23T01:01:25.105Z","tsv":"'/api/v1/charges/65':102,194,212 '/request':13,28 '0.02':12,27,89,121 '000':116 '20':115 '6':126 'Base network API' 'USDC micropayment API' 'accept':151 'access':7,22,38,107 'actual':232 'ai':58 'analysi':62 'analyt':57 'api':6,21,37,54,106,139,164,205 'application/json':156 'awar':227 'base':9,24,97,117 'base-network' 'behind':234 'call':4,19,129 'clarifi':210 'classif':65 'collect':48 'connect':173 'content':179 'convers':82 'crypto-paid API' 'data':56 'decim':127 'descript':190 'doc':163 'document':158,230 'embed':66 'endpoint':32,85,101,150,195,236 'estim':76 'exact':136 'exampl':187 'exchang':71 'extrem':160 'feed':70 'financ':67 'function':233 'gas':75 'generat':83 'geocod':80 'host':46 'infrastructur':78 'json-response' 'key':140 'label':104 'land':201 'learn':60 'limit':143 'list':203 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':59 'made':132 'mani':204 'map':213 'need':148 'network':98 'no-api-key' 'one':215 'openapi':183 'page':168,202 'path':206 'pay':2,17,51 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':50 'payment':42,111,130 'per':3,18,52,90,128 'post':152 'premium':5,20,36,105 'premium API access' 'price':69,87,165 'prompt':175 'prospect':223 'protocol':43 'provid':35 'quot':74 'rate':72,142 'readm':167 'render':170 'request':53,91,153 'request/response':186 'requir':109 'resourc':222 'respons':157 'return':155,197 'schema':184 'scheme':137 'sentiment':61 'separ':221 'settl':92 'sinc':123 'site':45,199 'span':55 'spars':161 'specif':100,196 'subscript':146 'summar':64 'text':63 'token':73 'unit':118 'unknown':238 'usd':122 'usdc':15,30,94,120,124 'usdc-settlement' 'use':125 'user':224 'util':79 'valid':81 'via':10,25,39,133 'wallet':174 'web3':68 'whether':211 'without':229 'x402':11,26,41,135 'x402 API' 'x402-payment'","prices":[{"id":"0f60174a-2e69-493a-9773-b5fac57ac6ff","listingId":"a455e3e9-2878-4f89-8c67-d0e74adaf520","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/65","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:41.037Z"}],"sources":[{"listingId":"a455e3e9-2878-4f89-8c67-d0e74adaf520","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/65","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:41.037Z","lastSeenAt":"2026-04-23T01:01:25.105Z"}],"details":{"listingId":"a455e3e9-2878-4f89-8c67-d0e74adaf520","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/65 \\\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/charges/65"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/65"}],"useCases":["Accessing paid API endpoints without subscriptions or API keys","Making micropayment-gated API calls settled in USDC on Base","Programmatic agent access to pay-per-use services via x402 protocol"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Applications requiring free or high-volume bulk access at discounted rates"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.856Z"},"updatedAt":"2026-04-23T01:01:25.105Z"}}