{"id":"f10630d6-f141-4300-9d9d-e648e5a66d22","shortId":"wGxQZg","kind":"x402","title":"Pay-per-request API suite on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API suite on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/products/6` is listed as \"Premium API Access\" and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. No API keys or rate limits are advertised; callers pay per request using an x402 `X-PAYMENT` header settled in USDC on Base.\n\nThe broader 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 listed endpoints share the same $0.02/request pricing.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The specific functionality behind `/api/v1/products/6` (\"Premium API Access\") is unclear and may be a generic product endpoint rather than a domain-specific service. Without documentation or example payloads, callers will need to experiment to determine what this endpoint actually returns.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","no-api-key","json-response"],"categories":["general","api-marketplace"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content.","No OpenAPI or schema definition found; request and response formats are unknown.","The specific purpose of /api/v1/products/6 ('Premium API Access') is unclear and may be a generic placeholder.","Cannot verify what data or service is actually delivered upon payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/6","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/products/6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint accepts or returns. No OpenAPI spec, no examples, and the docs pages are empty. The purpose of /api/v1/products/6 specifically is ambiguous.","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":"2026-04-18T21:24:15.009Z","embedding":[-0.023986816,-0.037963867,0.039611816,0.009117126,0.02217102,-0.031982422,-0.027908325,0.055908203,0.07397461,-0.07751465,0.021865845,-0.056121826,-0.024780273,-0.048706055,-0.02305603,0.022445679,0.0064201355,0.013595581,-0.05871582,0.034118652,0.017410278,-0.009819031,-0.041412354,0.026885986,-0.0025177002,-0.011665344,-0.015792847,0.0049057007,-0.011329651,-0.050750732,0.04196167,-0.032806396,0.008575439,0.022842407,-0.010292053,-0.030136108,-0.0017518997,0.05303955,0.0413208,0.0012817383,-0.012084961,-0.04196167,0.0019168854,-0.02545166,-0.056671143,0.0013456345,0.014511108,-0.030929565,-0.0003771782,0.0048828125,-0.025680542,-0.0028533936,-0.016418457,-0.0032806396,0.014083862,0.024261475,-0.000395298,-0.0043945312,0.003364563,0.005039215,0.013198853,-0.054138184,-0.017150879,-0.008399963,-0.002922058,0.06274414,-0.015930176,0.041748047,0.00667572,0.05783081,0.033996582,0.04147339,0.03527832,0.016906738,-0.0073661804,0.0063285828,-0.0014333725,0.068115234,-0.0046920776,-0.012237549,-0.0059890747,-0.00019991398,-0.03265381,-0.0082473755,-0.017868042,-0.06359863,-0.011009216,0.011291504,-0.030059814,0.019119263,-0.076538086,-0.008781433,-0.025100708,0.00076055527,0.00087594986,-0.0023479462,-0.008384705,0.035308838,-0.0064964294,0.021881104,0.0037727356,-0.030929565,-0.0055122375,0.0138168335,0.0317688,0.032348633,0.03111267,0.026931763,0.0009431839,-0.02381897,-0.03286743,0.0054626465,-0.01966858,-0.004802704,-0.007972717,0.023345947,-0.031951904,0.011367798,-0.021133423,0.01184082,-0.052124023,0.04937744,0.024765015,-0.006958008,0.009567261,-0.03878784,-0.02748108,0.021240234,-0.012893677,-0.017181396,0.03717041,0.0033779144,0.029556274,-0.0256958,-0.027908325,0.00674057,-0.0026283264,-0.018005371,-0.04748535,-0.027191162,0.025665283,-0.022964478,0.02456665,0.021606445,-0.103637695,-0.010810852,-0.0463562,-0.0057754517,-0.04309082,0.0032100677,-0.002670288,0.013832092,-0.040802002,-0.034210205,-0.024932861,-0.022613525,-0.0015735626,0.03805542,-0.020095825,0.048461914,-0.019958496,0.026306152,0.018188477,0.0020999908,0.025482178,0.022613525,-0.018508911,-0.08068848,-0.081970215,-0.027145386,-0.0044937134,-0.009803772,-0.019332886,-0.0013065338,-0.0025730133,-0.06756592,-0.021026611,-0.011428833,-0.004501343,-0.03781128,-0.0014038086,-0.04019165,-0.0024681091,-0.031280518,-0.050933838,-0.0107040405,-0.038330078,0.05682373,0.012039185,0.021728516,0.029464722,-0.012229919,0.05633545,0.02418518,-0.004257202,-0.03137207,0.0014009476,-0.016204834,0.025924683,-0.0073547363,0.018081665,-0.02659607,0.04864502,0.06149292,0.010902405,-0.01512146,0.0017471313,-0.043273926,-0.047302246,-0.028137207,0.016967773,0.010093689,-0.0055007935,0.04699707,-0.037597656,-0.04034424,0.004558563,0.0027275085,0.004108429,0.089660645,0.013793945,-0.0025253296,0.0087509155,0.019729614,-0.036865234,0.03842163,0.034332275,0.007835388,-0.01449585,-0.033813477,0.019729614,0.047943115,-0.015464783,0.018356323,-0.018676758,0.018539429,-0.009605408,0.00894928,0.020690918,-0.021697998,-0.015197754,-0.0362854,-0.029556274,0.030822754,0.0099487305,-0.026245117,-0.03878784,-0.07220459,0.043548584,0.025558472,0.052001953,-0.004470825,0.021575928,-0.023925781,-0.0061187744,-0.08734131,0.04208374,0.0690918,-0.015655518,-0.008842468,0.0113220215,0.0035247803,-0.021484375,0.00045752525,-0.0037002563,-0.024139404,-0.0047340393,0.013702393,-0.04522705,0.0041923523,0.027664185,0.033203125,0.047698975,-0.013832092,-0.042175293,-0.025253296,-0.011810303,-0.008132935,-0.025268555,0.006843567,-0.010543823,-0.002023697,0.025939941,-0.0016956329,0.03164673,-0.0033988953,0.020370483,0.010604858,-0.02458191,-0.008972168,-0.01210022,0.022766113,0.013328552,-0.07208252,0.02130127,-0.0158844,0.08276367,-0.055236816,0.03552246,-0.013313293,0.037750244,0.038085938,-0.008407593,-0.03363037,0.006084442,0.037139893,0.0049819946,0.016967773,0.008300781,-0.041992188,0.011383057,0.07672119,-0.020614624,-0.017501831,0.0011072159,0.013435364,0.02748108,-0.0039482117,-0.049224854,-0.027236938,-0.016464233,-0.044433594,0.027908325,-0.021057129,0.029174805,-0.019134521,0.0009226799,-0.023544312,-0.009254456,-0.032409668,0.018600464,-0.012718201,-0.008842468,-0.017822266,-0.015411377,0.0013999939,0.030349731,-0.011749268,0.0053215027,0.025268555,0.032165527,-0.02748108,-0.042999268,-0.027404785,-0.00730896,0.007068634,0.025985718,0.02128601,0.0135269165,0.053619385,-0.021209717,0.012527466,0.01852417,0.016036987,0.04257202,-0.0018205643,0.014564514,-0.06500244,-0.05770874,-0.029388428,-0.0473938,0.024139404,0.028549194,-0.008407593,0.03967285,-0.010566711,0.000895977,-0.033843994,0.007320404,-0.041229248,0.014297485,0.053710938,-0.005077362,-0.033355713,-0.014587402,-0.01007843,-0.0047073364,0.047851562,0.005554199,0.025924683,0.063964844,0.038635254,0.003490448,0.022750854,0.024307251,0.024276733,0.010917664,0.0011520386,-0.032562256,-0.010116577,0.021102905,-0.033843994,-0.019744873,-0.064819336,0.0541687,0.025482178,0.074157715,0.00064229965,0.01889038,0.03768921,-0.0036735535,0.013580322,-0.00554657,-0.0073623657,-0.028381348,-0.04083252,0.03237915,-0.012634277,-0.0006580353,-0.018035889,0.040405273,-0.010047913,0.016799927,-0.014923096,0.04638672,0.006175995,0.006175995,0.0234375,0.004764557,0.043060303,0.03845215,-0.036132812,0.026397705,0.033691406,-0.044433594,0.015945435,0.032287598,-0.021896362,-0.032989502,-0.052886963,-0.02798462,0.003124237,0.015213013,-0.046905518,0.0024642944,-0.00868988,0.0053253174,0.032196045,-0.019012451,-0.0006837845,0.01852417,-0.009925842,-0.064208984,0.0020618439,-0.036834717,-0.008476257,0.037963867,-0.03338623,-0.0046920776,-0.00605011,-0.018920898,-0.0077781677,-0.0063209534,0.027404785,0.0021209717,-0.032073975,0.045715332,0.015396118,0.00868988,0.012283325,0.026367188,0.036224365,0.013977051,0.05026245,0.009780884,-0.034973145,-0.044067383,0.019958496,-0.050994873,0.003004074,0.012214661,-0.02909851,0.0031852722,-0.03277588,-0.028442383,-0.020324707,-0.0040130615,-0.015159607,0.014839172,0.024230957,-0.02229309,-0.03665161,-0.06652832,-0.015655518,-0.010620117,0.08215332,0.016342163,-0.008659363,-0.060760498,-0.010765076,0.009597778,0.0049095154,0.030273438,-0.015083313,-0.011024475,-0.004951477,-0.0309906,0.005973816,-0.023147583,0.02784729,0.0016756058,-0.021102905,0.028244019,-0.002029419,0.0256958,-0.011566162,0.0051460266,0.019958496,-0.021728516,-0.006752014,-0.011962891,0.033996582,0.0054855347,0.004421234,-0.0473938,0.056030273,0.0029735565,0.035858154,-0.032592773,-0.017089844,-0.01525116,0.0046691895,0.016983032,0.006511688,-0.008575439,-0.02168274,-0.045806885,-0.039916992,0.02432251,-0.021987915,0.035949707,0.008178711,-0.00007426739,0.025512695,-0.0045280457,0.005508423,0.017669678,-0.034820557,-0.008911133,-0.01940918,-0.032226562,-0.016799927,0.005176544,-0.01890564,0.0128479,-0.02557373,0.015975952,0.0061798096,-0.020812988,0.033233643,0.01737976,0.011024475,0.0309906,0.0046577454,0.019256592,0.051971436,0.0084991455,-0.03878784,0.027114868,-0.00983429,0.025665283,-0.013725281,0.03024292,0.040283203,-0.009010315,0.0037136078,-0.0023822784,-0.019683838,-0.024093628,-0.004436493,-0.0004940033,0.018051147,-0.008659363,-0.037902832,0.017120361,0.00894928,-0.017837524,-0.030426025,0.008239746,0.012680054,-0.03768921,0.013557434,0.021591187,0.05432129,-0.027801514,0.0061683655,0.016082764,0.03338623,0.032348633,0.016204834,-0.013870239,0.018188477,-0.017745972,0.0019350052,-0.0007510185,-0.009025574,0.029251099,0.0016050339,0.023712158,0.028671265,0.016693115,-0.017471313,-0.029678345,0.012435913,-0.016967773,-0.017852783,0.03918457,0.024276733,0.025360107,-0.030075073,0.028167725,0.02722168,-0.014724731,-0.013458252,-0.01361084,0.041870117,-0.015289307,-0.022506714,0.009536743,0.010955811,0.03994751,-0.055114746,-0.001745224,0.0062179565,0.008781433,-0.022354126,-0.027694702,-0.052368164,0.021697998,0.028030396,0.013977051,0.022613525,0.03778076,0.00642395,0.0032348633,0.030776978,0.011734009,-0.012702942,-0.02029419,-0.037200928,-0.023345947,0.02128601,0.0027580261,-0.03933716,0.021087646,-0.01991272,-0.02319336,0.014892578,-0.018310547,-0.0066833496,-0.008422852,0.013580322,0.028884888,0.00007241964,0.023803711,-0.0030612946,-0.029525757,0.0014047623,0.005268097,0.013420105,-0.052520752,0.017532349,-0.003929138,-0.0061035156,-0.00043058395,0.019439697,0.020050049,0.0289917,0.0126571655,0.043060303,-0.04244995,0.032592773,-0.035705566,0.023666382,0.002483368,-0.042541504,-0.017211914,-0.021621704,-0.01108551,0.0501709,-0.019363403,-0.018112183,-0.023117065,-0.015319824,-0.01574707,-0.047821045,0.009559631,0.03781128,0.045410156,-0.015609741,0.008468628,0.013557434,0.005344391,-0.034118652,-0.003686905,-0.018234253,0.012763977,0.023986816,-0.009490967,-0.016174316,-0.019927979,-0.015281677,0.014602661,-0.03152466,-0.047729492,-0.010360718,-0.010879517,-0.010566711,-0.013084412,-0.024154663,-0.03152466,0.008712769,-0.036956787,0.023025513,0.009269714,0.020721436,0.017608643,-0.020965576,0.0025157928,0.031280518,-0.015388489,0.04348755,-0.005680084,0.014671326,-0.034942627,0.014167786,0.023742676,0.01751709,-0.0023002625,-0.008796692,0.0013599396,-0.0044822693,-0.05239868,-0.003835678,-0.0005698204,-0.016494751,-0.0061073303,-0.012779236,-0.054229736,-0.01436615,-0.015037537,0.0009756088,0.028121948,0.041870117,0.009033203,-0.0043907166,0.0023269653,-0.0021629333,-0.008758545,-0.0345459,0.037078857,0.011131287,-0.006095886,0.027236938,0.045440674,0.0045204163,-0.013687134,-0.002494812,0.003074646,0.032836914,-0.016067505,0.0037441254,-0.018707275,0.023666382,-0.0043907166,-0.022415161,-0.04434204,0.0038223267,0.079833984,0.0021324158,0.0011043549,-0.016601562,-0.017623901,0.018112183,0.03314209,-0.0513916,-0.011650085,-0.023468018,0.027526855,-0.021026611,0.025619507,0.0046043396,0.025848389,-0.01965332,-0.042999268,-0.01499939,-0.006336212,-0.014480591,-0.074035645,-0.025604248,-0.0703125,-0.000059068203,-0.018707275,-0.02557373,0.0019664764,0.010955811,-0.017227173,-0.07116699,0.016967773,0.04336548,-0.00064611435,0.032440186,-0.0032310486,0.028335571,0.03010559,-0.031341553,-0.009475708,0.033203125,-0.014404297,-0.019607544,-0.019851685,0.013267517,-0.009513855,-0.009094238,0.016296387,0.016403198,0.030960083,0.010185242,0.0059814453,-0.012588501,0.014083862,-0.01020813,0.022949219,-0.010803223,-0.019622803,0.046722412,-0.054229736,0.007713318,0.016860962,-0.0050582886,0.005783081,0.023834229,0.048095703,-0.03829956,-0.014762878,0.030639648,0.016464233,0.03640747,-0.028945923,0.03463745,0.010475159,-0.033233643,0.015357971,-0.013427734,-0.01626587,-0.03778076,-0.021606445,0.03604126,-0.014297485,0.014732361,-0.013465881,0.0039596558,0.011352539,-0.0093307495,-0.0037174225,-0.030181885,-0.018630981,-0.017211914,-0.0006775856,-0.0006017685,-0.013198853,0.002035141,0.021392822,0.022750854,0.026229858,0.0021858215,-0.00048208237,0.012283325,0.03970337,-0.012397766,-0.0023097992,0.018081665,0.0023841858,0.014762878,0.0076675415,0.015037537,-0.05178833,0.0075187683,-0.036102295,-0.0025424957,0.0021209717,-0.0028018951,-0.006904602,-0.0103302,-0.0044441223,0.0016431808,-0.033416748,0.013763428,-0.019805908,-0.035369873,-0.014404297,-0.017715454,0.027526855,0.003211975,0.0031852722,0.00844574,0.008964539,0.04928589,0.011260986,-0.0051002502,0.021911621,0.03149414,0.015464783,-0.026626587,-0.016845703,-0.0016422272,0.009857178,0.0018749237,-0.041137695,0.012283325,0.037475586,-0.009857178,-0.002954483,0.0067100525,0.025619507,-0.0067596436,0.011238098,-0.005756378,0.024154663,-0.015975952,0.032562256,-0.03564453,0.0026607513,0.014579773,0.016220093,0.0035572052,-0.010177612,-0.03338623,0.020477295,-0.007911682,-0.0043563843,0.046325684,-0.0030498505,0.030136108,-0.027130127,-0.031204224,0.0019512177,-0.02053833,-0.016906738,0.015716553,-0.016494751,-0.00907135,0.010215759,-0.026992798,0.036590576,-0.034362793,0.013633728,0.0037765503,-0.00680542,-0.00440979,-0.00032806396,-0.022018433,0.008522034,-0.017974854,-0.0065231323,-0.0040512085,0.04827881,-0.008056641,0.03366089,0.054229736,0.010810852,0.0135650635,-0.040863037,-0.030853271,-0.011833191,-0.015281677,0.019958496,-0.016693115,0.06542969,0.03552246,0.013313293,0.038909912,0.02180481,0.031219482,-0.008377075,0.0151901245,-0.00995636,0.019317627,-0.015052795,0.018676758,0.004108429,0.037628174,-0.028945923,0.032714844,0.01776123,0.03225708,-0.036590576,0.035247803,0.06750488,0.026489258,0.0015544891,0.04107666,0.0040359497,-0.011054993,-0.017608643,-0.010559082,0.0657959,0.020431519,0.045562744,0.045318604,-0.0026378632,0.004219055,0.015388489,-0.0418396,-0.024978638,0.07788086,0.022583008,-0.017929077,-0.0032634735,-0.0030326843,0.0075149536,-0.05029297,-0.034698486,0.025985718,0.014945984,0.00052022934,-0.013320923,-0.004787445,-0.015304565,0.005672455,0.014045715,-0.0021247864,-0.010040283,0.019165039,0.02470398,0.0035438538,0.02633667,0.001584053,0.028640747,-0.037200928,-0.014137268,0.016281128,0.0073013306,-0.015640259,-0.0088272095,0.013435364,0.00007742643,0.039520264,0.04309082,-0.017105103,0.009223938,0.025421143,0.01033783,-0.001127243,0.049621582,0.038879395,0.005962372,0.04949951,0.03491211,0.023544312,-0.041534424,0.008216858,0.0007762909,-0.004875183,-0.0065460205,-0.014083862,-0.003440857,-0.018936157,0.0178833,0.00011307001,-0.015823364,0.022918701,0.03100586,0.01374054,0.0010242462,-0.006855011,0.014167786,-0.022216797,-0.0072746277,0.012634277,0.0010433197,0.033081055,0.022399902,0.030685425,-0.022521973,0.016036987,-0.011039734,-0.0137786865,-0.008964539,0.015319824,-0.031707764,0.006450653,-0.007751465,-0.001865387,-0.055847168,0.01612854,0.037109375,-0.00014531612,0.029205322,0.019073486,-0.0044136047,0.00008684397,0.02394104,0.014045715,-0.0026130676,-0.010910034,-0.01889038,0.02798462,0.043518066,-0.0007658005,0.020996094,-0.010925293,-0.004688263,0.00063610077,-0.00920105,0.0027637482,-0.003873825,-0.0032577515,-0.021118164,0.017990112,0.025131226,0.02255249,0.04788208,-0.00076055527,-0.017089844,0.0046424866,0.03604126,0.021270752,0.01701355,0.0029029846,0.02381897,-0.0060653687,0.03878784,0.027267456,0.0121536255,0.0178833,-0.031036377,-0.011642456,0.018249512,-0.011116028,0.026611328,-0.023208618,0.0067253113,-0.015991211,0.024475098,-0.009086609,-0.047943115,0.009315491,-0.020584106,-0.0110321045,-0.024398804,0.005908966,0.0006070137,0.026763916,0.03729248,0.021942139,-0.03970337,0.064941406,-0.019104004,0.05496216,-0.01852417,-0.01512146,0.0574646,0.03237915,0.041107178,0.017532349,0.012817383,-0.036834717,0.019515991,0.052337646,0.034973145,-0.0041046143,-0.0014886856,-0.016799927,0.03677368,-0.002937317,0.029312134,-0.0029964447,0.004802704,0.014564514,-0.00598526,-0.007499695,-0.011657715,-0.0044059753,-0.00088596344,0.04827881,-0.024215698,-0.006412506,-0.020553589,-0.013069153,0.026916504,-0.005706787,0.00969696,-0.0032863617,-0.046936035,0.014259338,-0.040527344,-0.025787354,0.0052223206,0.018478394,-0.032989502,-0.0096588135,0.006980896,0.014976501,-0.01727295,0.028335571,0.019012451,0.00034713745,0.020843506,0.03250122,-0.0036907196,0.03060913,-0.0099487305,0.01890564,0.045043945,-0.007255554,-0.010902405,0.002368927,0.015716553,-0.01096344,0.008964539,0.027526855,-0.013298035,0.009880066,0.0107421875,-0.0057792664,-0.0036067963,0.018981934,0.0041046143,0.0077209473,-0.010116577,-0.00497818,0.011222839,0.0042762756,0.00064849854,0.011054993,-0.011116028,-0.006088257,0.017715454,0.032989502,0.02168274,-0.032073975,-0.00036120415,0.0035686493,0.015548706,-0.011451721,-0.019989014,-0.01687622,-0.017669678,0.022720337,0.010643005,0.007713318,0.01776123,-0.023132324,0.003458023,0.03186035,0.027114868,0.0072631836,0.010368347,-0.008865356,0.009460449,-0.028442383,-0.0104522705,-0.0037574768,-0.0047569275,0.01651001,0.026611328,0.0021133423,-0.023086548,0.02458191,0.000579834,0.014122009,0.00504303,-0.028015137,0.018096924,-0.011405945,-0.014190674,0.0034313202,0.004722595,-0.010093689,-0.011482239,-0.02772522,0.03125,0.047668457,-0.014640808,-0.02166748,0.016296387,0.01322937,0.022598267,0.036468506,0.0011386871,0.040985107,0.018432617,-0.023651123,-0.021697998,0.02659607,-0.008491516,-0.020065308,0.007156372,-0.0023097992,-0.020004272,0.005104065,0.008857727,0.00016140938,-0.018035889,-0.023284912,-0.0056381226,-0.008094788,0.028518677,-0.0022335052,0.00983429,-0.008056641,-0.011795044,0.0024909973,-0.03564453,-0.052581787,-0.028945923,0.004463196,-0.018127441,-0.064331055,0.0072402954,-0.02507019,0.01171875,-0.011871338,-0.0024986267,-0.007167816,0.02192688,-0.014373779,0.017211914,0.0076942444,0.022354126,0.010498047,0.004989624,0.014961243,-0.020370483,-0.027618408,-0.026062012,-0.00440979,-0.005680084,0.019348145,0.014419556,0.04031372,0.022857666,-0.0062675476,0.0055007935,-0.011871338,0.003730774,-0.004470825,-0.016479492,-0.021896362,0.019622803,0.012496948,-0.004676819,-0.0012683868,0.042419434,-0.025253296,-0.006000519,0.016693115,0.054229736,0.0050849915,0.035095215,-0.010856628,-0.012794495,-0.008377075,0.0068092346,-0.008430481,0.014282227,0.010673523,-0.006378174,-0.012481689,-0.0001552105,0.01576233,-0.012931824,0.0006914139,0.023590088,0.014030457,-0.012481689,0.03756714,0.02670288,0.008125305,-0.017837524,-0.014533997,0.0154418945,0.05026245,0.013870239,0.008705139,-0.0016222,0.006664276,-0.008552551,0.01084137,-0.0077590942,-0.004333496,-0.048309326,-0.016067505,-0.030288696,0.032989502,-0.006210327,0.014724731,-0.0158844,0.013336182,-0.008903503,-0.029571533,-0.024139404,0.026473999,0.01777649,-0.028411865,-0.020324707,0.007320404,0.023712158,-0.02470398,-0.006881714,-0.036865234,-0.029388428,-0.0076446533,-0.018753052,0.02029419,0.020767212,-0.006755829,0.008895874,-0.001958847,-0.005886078,-0.0006017685,0.02909851,-0.010726929,-0.004837036,0.018478394,0.010627747,-0.020370483,0.014335632,0.0029449463,-0.0044670105,0.008392334,-0.009994507,0.013412476,-0.01574707,0.032928467,-0.00031518936,-0.01689148,0.034576416,0.0135269165,0.015777588,-0.028457642,0.01499939,-0.005420685,0.0004878044,0.048461914,-0.02822876,-0.016784668,0.016723633,-0.013160706,-0.015533447,0.00024580956,0.024307251,0.023132324,-0.01838684,0.030181885,-0.013259888,-0.007129669,0.012924194,0.016296387,-0.015136719,-0.0038032532,0.045440674,0.0016765594,-0.005092621,0.013671875,-0.011856079,-0.016052246,-0.014839172,0.015670776,-0.009666443,-0.023391724,0.01272583,0.0076141357,0.042175293,-0.005252838,0.017181396,0.025177002,-0.0010385513,0.029556274,0.011047363,0.03781128,0.007850647,-0.019302368,0.010063171,-0.0056991577,-0.0259552,-0.00843811,0.0072898865,0.0018672943,-0.03543091,0.017929077,-0.0059013367,0.026184082,-0.019683838,0.008934021,-0.021255493,-0.00289917,-0.028640747,0.0044555664,-0.030456543,0.01637268,0.043823242,0.0121536255,0.01802063,0.0032310486,-0.022476196,0.025497437,0.057281494,0.0019283295,-0.036468506,-0.0101623535,0.010063171,-0.0059776306,0.015014648,0.008369446,-0.011604309,-0.021697998,0.0062713623,-0.017364502,0.007801056,0.005908966,0.01474762,-0.008071899,0.0014095306,-0.0042762756,0.020385742,-0.011001587,0.0014543533,0.0031223297,0.0065994263,0.036254883,0.022720337,-0.010437012,0.021362305,0.021728516,-0.037109375,0.059143066,-0.0056114197,0.02243042,-0.0131073,0.018615723,-0.04107666,-0.014152527,-0.007686615,0.011260986],"createdAt":"2026-04-18T18:34:35.322Z","updatedAt":"2026-04-22T15:00:34.260Z","lastSeenAt":"2026-04-22T15:00:34.260Z","tsv":"'/api':172 '/api/v1/products/6':63,208 '/call':19,38 '/docs':170 '/pricing':171 '/readme':174 '/request':163 '0.02':18,37,89,162 '000':78 '0x8335':83 '20':77 '2913':84 '6':87 'Base network API' 'USDC API' 'access':50,69,211 'actual':243 'advertis':99,119 'ai':12,31,130 'analysi':134 'analyt':124 'api':5,24,48,68,93,210 'avail':200 'base':8,27,58,79,86,115 'base-network' 'behind':207 'broader':117 'call':91 'caller':100,233 'categori':122 'classif':137 'collect':42 'connect':180 'content':186 'convers':154 'crawl':203 'data':11,30,123,127 'decim':88 'determin':239 'document':165,195,229 'domain':225 'domain-specif':224 'embed':138 'endpoint':16,35,49,62,121,158,220,242 'estim':148 'exampl':199,231 'exchang':143 'experi':237 'export':128 'extrem':167 'feed':142 'financ':13,32,139 'four':120 'function':206 'gas':147 'generat':155 'generic':218 'geocod':152 'header':110 'host':40 'infrastructur':150 'insight':129 'json-response' 'key':94 'learn':132 'limit':97 'list':65,157 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':131 'may':215 'metric':125 'micropayment API' 'need':235 'network':59 'no-api-key' 'openapi':190 'page':175 'pay':2,21,45,101 'pay per call API' 'pay-per-request':1,20,44 'payload':232 'payment':54,73,109 'per':3,22,46,90,102 'platform':118 'premium':67,209 'premium API access' 'price':141,164 'product':219 'prompt':182 'protocol':55 'quot':146 'rate':96,144 'rather':221 'render':177 'report':126 'request':4,23,47,103 'request/response':193 'requir':71 'return':244 'schema':194 'sentiment':133 'servic':227 'settl':111 'share':159 'spars':168 'spec':191 'specif':61,205,226 'suit':6,25 'summar':136 'text':135 'token':145 'unclear':213 'unit':80 'usag':198 'usdc':82,113 'usdc-settlement' 'use':104 'util':15,34,151 'valid':153 'via':9,28,51 'wallet':181 'web3':140 'without':228 'x':108 'x-payment':107 'x402':10,29,53,106 'x402 API' 'x402-payment'","prices":[{"id":"0bb0eb49-1d0e-43a1-a804-5752636d4073","listingId":"f10630d6-f141-4300-9d9d-e648e5a66d22","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/products/6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:35.322Z"}],"sources":[{"listingId":"f10630d6-f141-4300-9d9d-e648e5a66d22","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/6","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:35.322Z","lastSeenAt":"2026-04-22T15:00:34.260Z"}],"details":{"listingId":"f10630d6-f141-4300-9d9d-e648e5a66d22","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/6 \\\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 requiring USDC payment on Base with maxAmountRequired of 20000 base units (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/products/6"},{"claim":"All listed endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/products/6"}],"useCases":["Accessing premium API data without needing an API key or subscription","Making one-off paid API calls settled in USDC on Base","Agent-driven workflows that need instant, keyless API access with crypto payment"],"bestFor":["Developers or agents who want keyless, pay-per-use API access","Users already holding USDC on Base who want frictionless micropayments","Exploring x402-protocol-based API marketplaces"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:17:01.027Z"},"updatedAt":"2026-04-22T15:00:34.260Z"}}