{"id":"a7c840d5-1d97-4831-862e-4756b0cd4468","shortId":"JbGwJZ","kind":"x402","title":"x402-payable API platform offering data, AI, finance, and utility endpoints at $0.02/request on Base.","tagline":"x402-payable API platform offering data, AI, finance, and utility endpoints at $0.02/request on Base.","description":"lowpaymentfee.com is an x402-enabled API platform that exposes a variety of 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 and accept payment via USDC on the Base network using the x402 protocol.\n\nThe specific endpoint at `/api/resource/21` is listed as \"Premium API Access\" and returns a live 402 challenge requiring an x402 payment of up to 20,000 units of USDC (0x8335... on Base). The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns application/json. However, the `/api/resource/21` path does not correspond to any of the named endpoints on the site's landing page, so its exact functionality is unclear.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available. The platform advertises no API keys, no rate limits, and instant access, relying entirely on per-request x402 payments for access control.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","sentiment-analysis","text-summarization","text-classification","embeddings","price-feeds","exchange-rates","geocoding","json-api"],"categories":["llm","finance","geo","data"],"synonyms":["low payment fee","x402 api","pay per request api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["The path /api/resource/21 does not match any of the named endpoints listed on the landing page; its actual functionality is unknown.","All documentation pages (docs, API, pricing, README) are empty, rendering only a 'Connect wallet' prompt.","No OpenAPI schema or request/response examples are available.","No information about the actual data or service returned by this endpoint.","maxAmountRequired of 20000 units — unclear if this is 0.02 USDC (6 decimals) or another denomination; the landing page advertises $0.02/request but the challenge shows 20000."],"endpointUrl":"https://lowpaymentfee.com/api/resource/21","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/resource/21","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 402 challenge, but the specific resource /api/resource/21 is not documented anywhere on the site. All documentation pages render only 'Connect wallet' with no content. There is no OpenAPI schema, no request/response examples, and no explanation of what this particular endpoint does. The listing is effectively a stub with pricing info only.","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":"2026-04-18T19:37:38.362Z","embedding":[-0.02331543,-0.01966858,0.03390503,0.014785767,0.030654907,-0.022277832,-0.020568848,0.02357483,0.064575195,-0.058898926,0.044067383,-0.06100464,-0.030029297,-0.036987305,-0.004837036,0.011390686,0.0038013458,0.0060653687,-0.033447266,0.04034424,0.034362793,-0.0067214966,-0.033325195,0.024597168,-0.005973816,0.0010938644,0.007259369,0.016296387,-0.007549286,-0.032165527,0.022277832,-0.029220581,-0.004486084,0.008857727,-0.002500534,-0.013282776,0.018981934,0.048187256,0.020523071,-0.014442444,-0.006149292,-0.056365967,0.021560669,-0.009300232,-0.051727295,-0.0079422,0.019622803,-0.022323608,-0.014694214,-0.00655365,-0.032470703,-0.0008163452,-0.026626587,0.017532349,-0.00793457,-0.0009303093,-0.024002075,-0.011779785,0.0053253174,0.0036640167,0.0016965866,-0.043182373,-0.021011353,0.003036499,0.007949829,0.052703857,-0.00970459,0.044799805,-0.008552551,0.07196045,0.034179688,0.05319214,0.035461426,0.0031356812,0.019760132,-0.011352539,-0.024139404,0.04510498,-0.016143799,-0.035064697,-0.021316528,-0.0020656586,-0.06414795,-0.019958496,-0.02482605,-0.06921387,-0.021697998,0.024291992,-0.024124146,0.030273438,-0.07385254,-0.008293152,-0.023513794,-0.009414673,-0.018051147,-0.007881165,-0.015312195,0.016281128,0.0008778572,0.017410278,-0.023162842,-0.03765869,0.012969971,0.0135650635,0.041625977,0.051116943,0.021835327,0.015007019,0.016494751,-0.023651123,-0.02909851,0.007522583,-0.009231567,-0.010910034,0.004497528,0.006164551,-0.021865845,0.016143799,-0.012664795,0.014099121,-0.054992676,0.06213379,0.017852783,0.01159668,-0.011543274,-0.05227661,-0.00894165,0.013206482,-0.03314209,-0.017318726,0.036010742,0.011222839,0.011108398,-0.022872925,-0.045043945,0.019958496,-0.034362793,-0.01890564,-0.056732178,-0.01939392,0.032165527,-0.018936157,0.01928711,0.03012085,-0.09942627,-0.020996094,-0.035949707,0.004043579,-0.026809692,-0.01802063,0.012794495,0.022125244,-0.016448975,-0.024765015,-0.019317627,-0.034698486,-0.022872925,0.031066895,-0.0020427704,0.03213501,-0.005882263,0.017181396,0.007820129,-0.0062713623,0.006626129,0.024642944,0.0032997131,-0.091430664,-0.079833984,-0.025650024,-0.008331299,-0.014442444,-0.024337769,0.0068969727,0.0072517395,-0.07342529,-0.0051651,-0.007858276,0.008476257,-0.04598999,0.00522995,-0.027938843,0.00039100647,0.0059547424,-0.038909912,-0.025817871,-0.031585693,0.061584473,0.030471802,0.024261475,0.0178833,0.0053749084,0.068481445,0.0020999908,-0.027908325,-0.016143799,0.011917114,-0.022491455,0.044677734,-0.001906395,0.019317627,-0.010002136,0.050689697,0.06738281,0.0019130707,-0.011695862,-0.0088272095,-0.042541504,-0.04711914,-0.03942871,0.022521973,0.0011348724,-0.016586304,0.04724121,-0.016540527,-0.033599854,0.006187439,0.021820068,0.016357422,0.059906006,0.002122879,0.015029907,0.017654419,0.021560669,-0.031799316,0.05645752,0.034240723,0.022079468,-0.02784729,-0.045013428,0.034362793,0.03967285,-0.028823853,0.012237549,-0.017852783,0.009559631,-0.0038852692,0.004295349,0.02166748,-0.0044059753,-0.021209717,-0.032165527,-0.016357422,0.032318115,0.005558014,-0.03503418,-0.03857422,-0.07147217,0.029312134,0.027770996,0.040924072,0.0023345947,0.01889038,-0.025253296,-0.009635925,-0.06921387,0.041015625,0.06958008,0.005710602,-0.019729614,0.020217896,0.0063552856,-0.045288086,0.00091409683,-0.011207581,-0.022079468,-0.029769897,0.025741577,-0.049865723,0.003753662,0.031143188,0.035461426,0.04510498,-0.018753052,-0.06573486,-0.028793335,0.008674622,0.0034980774,-0.036956787,0.004875183,0.0038414001,0.024765015,0.034088135,0.007610321,0.01096344,0.008705139,0.023406982,-0.005130768,0.002506256,-0.018997192,-0.031921387,0.0021305084,0.010643005,-0.068725586,0.0077781677,0.01133728,0.08325195,-0.0552063,0.04623413,-0.017089844,0.02861023,0.044128418,-0.012580872,-0.052764893,0.0007457733,0.02809143,0.043151855,0.042388916,0.026763916,-0.004673004,-0.01108551,0.057922363,-0.012298584,0.015007019,0.0042686462,0.023269653,0.051330566,-0.007724762,-0.04171753,-0.04928589,-0.014289856,-0.03729248,0.040405273,-0.019958496,0.02407837,-0.0181427,-0.00015771389,-0.013885498,0.0047912598,-0.043640137,0.00013041496,-0.037628174,0.0035820007,-0.0052452087,-0.034942627,-0.0035552979,0.032440186,-0.0051612854,0.020812988,0.034057617,0.009056091,-0.018325806,-0.026626587,-0.024139404,-0.035858154,-0.030334473,-0.00023913383,0.014183044,0.017990112,0.046813965,-0.037384033,-0.0066108704,0.014427185,0.011138916,0.026046753,-0.00027108192,-0.013938904,-0.049468994,-0.055145264,-0.026123047,-0.044128418,0.019104004,0.02357483,0.0034675598,0.04663086,-0.009262085,-0.015541077,-0.030090332,0.03225708,-0.041931152,0.00013506413,0.047210693,-0.020980835,-0.047851562,0.009666443,0.0053863525,0.011543274,0.030899048,0.019042969,0.013954163,0.074279785,0.034851074,0.006340027,0.00026798248,0.018234253,0.023788452,-0.00053453445,-0.02331543,-0.029571533,-0.015235901,0.03289795,-0.02973938,-0.036834717,-0.055908203,0.05203247,0.017990112,0.07318115,0.010803223,0.02758789,0.026397705,-0.016159058,0.020080566,-0.01374054,-0.019714355,-0.027740479,-0.034729004,0.04083252,-0.011123657,-0.018859863,-0.017166138,0.034851074,-0.012191772,0.012619019,-0.028121948,0.049316406,-0.02708435,0.005050659,0.006538391,-0.002281189,0.06402588,0.04888916,-0.06274414,0.007320404,0.0053367615,-0.021438599,0.00062799454,0.041137695,-0.006958008,-0.0021476746,-0.050201416,-0.025680542,-0.00023674965,-0.0045433044,-0.042938232,0.00415802,0.010917664,0.018173218,0.01586914,-0.014320374,-0.023849487,0.014709473,-0.012214661,-0.06323242,-0.012771606,-0.048095703,0.0063438416,0.037231445,-0.022857666,-0.01235199,0.005268097,0.0011663437,0.0115356445,0.033691406,0.0046424866,0.0029144287,-0.048950195,0.02609253,-0.005355835,0.023025513,0.030685425,0.045928955,0.04434204,0.022079468,0.046447754,0.015975952,-0.026473999,-0.05331421,0.007797241,-0.036468506,-0.0006341934,0.007522583,-0.023620605,-0.0028591156,-0.01676941,-0.025436401,-0.022399902,0.012886047,-0.024978638,0.009002686,0.036224365,-0.04525757,-0.04385376,-0.0657959,-0.035339355,-0.0017709732,0.08282471,0.005569458,0.003479004,-0.05834961,-0.009056091,0.009346008,-0.0015869141,0.029708862,-0.015670776,-0.019958496,-0.019317627,-0.02861023,-0.018203735,-0.029922485,0.030090332,-0.008415222,-0.013313293,0.011581421,0.00071430206,0.010398865,0.00043845177,0.0019512177,0.026519775,-0.027832031,-0.0067100525,-0.030441284,0.027740479,0.0107421875,-0.0010137558,-0.043395996,0.056884766,0.008232117,0.04727173,-0.04257202,0.00087451935,-0.01184082,0.017181396,0.020187378,-0.016571045,-0.002494812,0.00315094,-0.04675293,-0.07336426,0.035217285,-0.015823364,0.023208618,0.016708374,0.0025253296,0.042388916,-0.025054932,0.012138367,0.014099121,-0.028335571,-0.010574341,-0.03387451,-0.03149414,-0.021850586,-0.007698059,-0.038879395,0.019485474,-0.014801025,-0.0011882782,-0.0149383545,-0.02758789,0.034088135,0.006877899,-0.009544373,0.0231781,0.006942749,0.01626587,0.042999268,0.0071640015,-0.049865723,0.026611328,0.00082063675,0.005596161,-0.009208679,0.04824829,0.03479004,-0.01675415,-0.019165039,-0.009010315,-0.021636963,-0.027420044,-0.009468079,0.0067253113,0.02053833,0.0030612946,-0.029144287,0.02053833,0.02670288,-0.013702393,-0.012428284,0.017425537,0.023330688,-0.043121338,0.020324707,0.014183044,0.055603027,-0.02633667,-0.0034503937,0.0020256042,0.028823853,0.021408081,0.013923645,-0.013549805,0.016815186,-0.0135650635,0.0044136047,-0.01309967,-0.026672363,0.012588501,-0.009132385,0.012825012,0.020050049,0.009056091,-0.04046631,-0.021591187,0.0032138824,-0.014884949,-0.021728516,0.03286743,0.015487671,0.0158844,-0.018981934,0.022521973,0.014427185,-0.028930664,-0.018127441,-0.012298584,0.051208496,-0.0066947937,-0.0003077984,0.013885498,0.010429382,0.01966858,-0.055877686,-0.0051002502,0.013786316,0.014656067,-0.020050049,-0.05102539,-0.037506104,-0.017410278,0.038360596,0.015571594,0.011421204,0.027572632,0.0011615753,-0.0008249283,0.018173218,-0.0037784576,-0.017730713,-0.013076782,-0.04244995,-0.02130127,-0.00014543533,0.00573349,-0.020874023,0.017990112,-0.012023926,-0.033203125,0.011955261,-0.006095886,-0.0050086975,-0.0018787384,0.017990112,0.04888916,-0.00029921532,0.024337769,-0.014167786,-0.041809082,-0.006702423,0.017059326,0.03277588,-0.036468506,0.018341064,-0.009666443,-0.013145447,-0.0021457672,0.010391235,0.028823853,0.021133423,0.012641907,0.034606934,-0.039398193,0.039978027,-0.03286743,0.010383606,0.0071640015,-0.045013428,-0.008934021,-0.029907227,-0.017410278,0.03616333,-0.023025513,-0.0019130707,-0.017303467,-0.04498291,-0.0071640015,-0.05267334,0.015136719,0.033111572,0.04824829,-0.031066895,-0.001865387,0.011436462,0.009918213,-0.013465881,0.004940033,-0.0045394897,0.028411865,0.024993896,0.0093307495,-0.024963379,-0.023239136,-0.00086069107,0.013847351,-0.051483154,-0.046813965,-0.019165039,0.0058517456,-0.011116028,0.002040863,-0.021591187,-0.04397583,-0.0034122467,-0.031555176,0.012901306,0.0028076172,0.021636963,0.02319336,-0.022247314,-0.0085372925,0.019180298,-0.024902344,0.021606445,-0.008583069,-0.013847351,-0.046905518,0.0013961792,0.040496826,0.017303467,0.0012931824,-0.02053833,-0.00020039082,-0.03463745,-0.055664062,0.000014424324,-0.008712769,-0.008590698,-0.010925293,0.010795593,-0.0496521,-0.001408577,-0.026916504,-0.00566864,0.018310547,0.010635376,0.009414673,-0.0031280518,-0.002527237,0.001405716,-0.016723633,-0.034851074,0.001666069,0.011833191,0.009544373,0.013938904,0.034210205,-0.0069236755,-0.024124146,0.017852783,0.0040359497,0.013023376,-0.01725769,0.009750366,-0.016525269,0.006401062,-0.010169983,0.0022697449,-0.031463623,0.003791809,0.07208252,-0.003479004,0.012611389,-0.004589081,-0.009628296,0.016036987,0.03677368,-0.048309326,-0.008010864,-0.022415161,0.01889038,-0.01576233,0.014732361,0.0043258667,0.024246216,-0.015411377,-0.047424316,-0.0048675537,0.006362915,0.0063209534,-0.066589355,-0.027954102,-0.07611084,0.006137848,-0.020751953,-0.02973938,-0.002828598,0.0077934265,-0.030960083,-0.08679199,-0.005847931,0.05630493,-0.011001587,0.012260437,-0.013267517,0.02217102,0.029342651,-0.011604309,-0.004295349,0.030838013,-0.02973938,-0.018753052,-0.028579712,0.04434204,-0.006996155,-0.022628784,0.007637024,0.012481689,0.013656616,-0.0012798309,0.020309448,0.004875183,0.016540527,-0.015464783,0.0158844,-0.008476257,-0.02281189,0.03845215,-0.05343628,0.024368286,0.0046653748,-0.006351471,-0.0002593994,0.042877197,0.038513184,-0.042633057,-0.01928711,0.043273926,0.0066833496,0.039123535,-0.021102905,0.05706787,-0.006500244,-0.010231018,0.011817932,-0.010673523,-0.0132751465,-0.030151367,-0.031982422,0.018630981,0.0038452148,0.0066223145,-0.020599365,-0.0008568764,0.033447266,0.011192322,0.00095653534,-0.019546509,-0.018081665,-0.019439697,0.005771637,0.0077705383,0.0072784424,0.0070724487,0.03137207,0.029708862,0.033569336,-0.0051727295,-0.0032310486,0.017150879,0.020736694,-0.013656616,-0.0005187988,0.016616821,0.019470215,0.029174805,0.016815186,0.023666382,-0.048095703,-0.016540527,-0.021240234,-0.014961243,-0.00045704842,-0.021026611,-0.00019097328,-0.0052223206,0.007259369,-0.008781433,-0.027359009,0.007583618,-0.034820557,-0.01638794,-0.013435364,-0.017745972,0.014152527,0.012634277,-0.004383087,0.011665344,-0.01751709,0.04763794,-0.0032424927,-0.013923645,0.03704834,0.030014038,0.013473511,-0.032165527,0.0051879883,-0.01550293,-0.00044941902,0.0063056946,-0.030654907,0.016815186,0.04623413,-0.012260437,-0.0034103394,-0.003522873,0.027252197,-0.0040245056,0.0023002625,-0.0026569366,0.022491455,-0.014205933,0.031555176,-0.057495117,0.011871338,0.020889282,-0.000049710274,0.0056152344,-0.020080566,-0.018539429,0.021865845,-0.00050115585,-0.0010242462,0.053588867,0.00042414665,0.03161621,-0.028259277,-0.03805542,-0.0031757355,-0.015083313,-0.019561768,0.012886047,-0.011375427,0.02633667,0.01637268,-0.022735596,0.031143188,-0.040161133,0.015167236,0.0052871704,0.011604309,-0.013771057,-0.009742737,-0.0043525696,-0.00035834312,-0.018798828,0.0022792816,-0.012931824,0.038726807,0.024993896,0.021575928,0.028884888,0.013923645,0.016479492,-0.041503906,-0.033935547,0.0011196136,-0.026855469,0.006526947,-0.02229309,0.043029785,0.038238525,0.009750366,0.04058838,0.022521973,0.030761719,0.0022678375,0.011245728,-0.004135132,0.019851685,-0.026535034,0.011947632,0.0079422,0.0463562,-0.030975342,0.011489868,-0.0056266785,0.020202637,-0.014518738,0.031433105,0.0637207,0.028366089,-0.0022602081,0.035888672,-0.0149002075,-0.0055770874,-0.015777588,-0.023513794,0.049560547,-0.000910759,0.049926758,0.031677246,0.0062026978,-0.0098724365,0.031982422,-0.017837524,-0.016967773,0.05307007,0.025619507,-0.019119263,-0.00068998337,-0.00258255,0.008300781,-0.039764404,-0.006706238,0.01826477,0.014572144,0.0024147034,-0.008132935,-0.0138168335,-0.014503479,0.0045280457,0.0017681122,0.019424438,-0.013572693,0.03353882,0.021057129,0.006702423,0.024276733,-0.012336731,0.026275635,-0.025314331,-0.012123108,0.010009766,0.008712769,0.0066108704,-0.0006160736,0.031829834,0.014602661,0.04385376,0.041046143,-0.017715454,-0.016616821,0.018463135,0.014846802,0.0074539185,0.042419434,0.032073975,0.009979248,0.029632568,0.03616333,0.025039673,-0.038146973,0.01789856,-0.0037384033,0.014656067,-0.011436462,-0.020004272,0.013549805,-0.0112838745,0.025466919,0.00054836273,-0.0032138824,0.02861023,0.02230835,-0.012161255,0.0001963377,0.00422287,0.023651123,-0.018356323,-0.00869751,0.003156662,-0.010147095,0.0234375,0.015182495,0.035980225,-0.027694702,0.03277588,-0.0022602081,-0.015380859,-0.00223732,0.018508911,-0.029846191,-0.0017967224,-0.007247925,-0.0074501038,-0.046539307,0.0076828003,0.019042969,-0.019378662,0.015129089,0.0099487305,-0.010292053,-0.008880615,0.032989502,0.02078247,-0.016799927,-0.00969696,-0.020996094,0.021057129,0.03213501,-0.0071983337,-0.0124435425,-0.03137207,0.0006623268,0.01008606,-0.010620117,0.004760742,0.003314972,-0.012138367,-0.0143585205,0.00881958,0.0317688,0.023422241,0.044891357,-0.015541077,-0.015007019,0.004760742,0.031036377,0.002193451,-0.0036811829,-0.007320404,0.028884888,-0.014251709,0.045837402,0.027908325,-0.0029392242,0.022979736,-0.005672455,-0.0022010803,0.0069618225,-0.021133423,0.026168823,-0.025314331,-0.00082683563,-0.0075569153,0.021896362,-0.021118164,-0.03564453,0.003042221,-0.0206604,-0.01386261,-0.020614624,0.025314331,0.0014152527,0.015235901,0.0395813,0.020690918,-0.021270752,0.06335449,-0.028411865,0.036834717,-0.010826111,-0.01322937,0.040008545,0.022399902,0.040527344,0.017868042,0.016464233,-0.033325195,0.010688782,0.0335083,0.0256958,0.009056091,0.008110046,-0.025299072,0.0368042,-0.01826477,0.03488159,-0.00031495094,3.5762787e-7,0.017425537,-0.0049476624,-0.018981934,-0.005153656,-0.011741638,0.012565613,0.057647705,-0.020202637,-0.01777649,-0.014099121,-0.011528015,0.026992798,-0.0027999878,0.005634308,0.00086688995,-0.03274536,0.006931305,-0.028182983,-0.015220642,0.016998291,0.026046753,-0.047698975,-0.009727478,0.017211914,0.027526855,-0.0357666,0.019897461,0.023117065,-0.00818634,0.017074585,0.04019165,-0.0046653748,0.030899048,-0.01134491,0.030273438,0.04925537,0.008804321,-0.01852417,0.012107849,0.007335663,-0.013038635,0.019577026,0.032043457,-0.0012865067,0.013031006,0.0073661804,0.0027885437,-0.0005865097,0.005367279,-0.005432129,-0.000053226948,-0.020812988,-0.0044555664,0.012626648,0.019592285,0.002626419,0.005958557,0.0020809174,-0.02708435,-0.0018701553,0.032989502,0.011695862,-0.026748657,0.010314941,0.0017576218,0.009536743,-0.019470215,-0.0014972687,-0.008781433,-0.033477783,0.010604858,0.032928467,-0.0008049011,0.012237549,-0.02532959,-0.002960205,0.027023315,0.0027770996,0.012916565,-0.0019207001,-0.0041923523,0.010391235,-0.02279663,-0.00037384033,-0.011993408,-0.006855011,0.016586304,0.027404785,0.002445221,-0.029449463,0.020889282,0.004096985,0.013458252,-0.001953125,-0.011138916,0.017105103,-0.0029392242,0.00075006485,-0.0030765533,0.013923645,-0.0075950623,-0.02003479,-0.029769897,0.04046631,0.0446167,-0.012382507,-0.014305115,0.009460449,0.03515625,0.03527832,0.03363037,-0.0037975311,0.042541504,0.01689148,-0.018737793,-0.031799316,0.028366089,-0.015235901,-0.04522705,0.018188477,-0.016494751,0.0009446144,0.013641357,0.005290985,-0.004295349,-0.044433594,-0.013427734,-0.006690979,-0.025527954,0.023498535,-0.00024867058,0.00944519,-0.039855957,-0.015220642,0.021636963,-0.025100708,-0.038482666,-0.01612854,-0.0020866394,-0.011978149,-0.0637207,0.000875473,-0.022445679,0.010444641,-0.01977539,0.007637024,-0.004798889,0.028656006,-0.012489319,-0.010444641,0.0131073,0.015823364,0.022506714,-0.0015964508,0.015686035,-0.0209198,-0.0115737915,-0.021499634,0.0124435425,-0.01939392,0.01612854,-0.01651001,0.03817749,0.022399902,-0.010101318,-0.0015163422,-0.016235352,-0.002746582,-0.00548172,-0.027008057,-0.03414917,0.01763916,0.014556885,-0.010009766,-0.008430481,0.034332275,-0.020095825,-0.009384155,0.019180298,0.04119873,0.007144928,0.033111572,-0.005367279,-0.00057315826,-0.034698486,0.0063972473,-0.018478394,0.009117126,0.004425049,0.008628845,-0.007293701,0.009521484,0.01309967,-0.0030498505,0.0030174255,0.040496826,0.012298584,-0.020950317,0.031082153,0.01828003,-0.0009031296,-0.0154800415,-0.0062942505,0.029876709,0.04449463,0.00390625,0.0003926754,-0.0063667297,0.016281128,-0.004798889,0.0071525574,0.01687622,-0.022628784,-0.03387451,-0.008399963,-0.022247314,0.042175293,-0.0017757416,0.0016870499,-0.008674622,0.010688782,-0.010505676,-0.034698486,-0.008468628,0.021011353,0.015533447,-0.021316528,0.012802124,0.0024757385,0.01612854,-0.032440186,-0.0077400208,-0.061523438,-0.032806396,-0.029144287,-0.022537231,0.021820068,0.009101868,-0.0027446747,-0.0073051453,0.003440857,-0.0006284714,-0.0009675026,0.014656067,-0.0033740997,-0.005657196,0.019470215,0.02003479,-0.015899658,0.024963379,-0.008621216,0.012413025,0.00037908554,-0.009117126,0.019134521,-0.012588501,0.033447266,0.006210327,-0.016357422,0.01574707,-0.0056877136,0.024917603,-0.018463135,-0.0029716492,-0.010398865,-0.007850647,0.034454346,-0.01966858,-0.017242432,0.012207031,-0.013282776,-0.02809143,-0.00032639503,0.024353027,0.029174805,-0.010421753,0.04763794,-0.019805908,-0.0057792664,0.005065918,0.007671356,-0.016113281,0.0032176971,0.030822754,0.004776001,0.0011901855,-0.00060653687,-0.01586914,-0.02885437,-0.010864258,0.008598328,-0.01411438,-0.01386261,0.021820068,0.019760132,0.0385437,-0.009552002,0.015357971,0.02116394,0.00340271,0.03768921,0.011230469,0.04736328,0.0061073303,-0.017456055,0.0027160645,0.010528564,-0.017822266,0.010322571,0.0036811829,0.0062675476,-0.04534912,0.011581421,0.00046348572,0.015914917,-0.018661499,0.01777649,-0.023361206,-0.00075149536,-0.033477783,0.008979797,-0.03994751,0.011177063,0.035858154,0.014183044,0.024414062,0.0025253296,-0.023071289,0.037231445,0.052001953,-0.0075569153,-0.0395813,-0.021209717,0.003528595,-0.009506226,-0.0028038025,0.0022735596,-0.019165039,-0.016723633,-0.0048599243,-0.011741638,-0.0035991669,-0.012397766,0.024093628,0.013214111,-0.011512756,0.0032520294,0.0046577454,-0.003993988,0.0014791489,0.018234253,-0.004333496,0.023864746,0.02973938,-0.018127441,0.017593384,0.006626129,-0.04864502,0.0340271,-0.008514404,0.027526855,-0.022323608,0.007896423,-0.04473877,-0.009109497,-0.015434265,0.0022735596],"createdAt":"2026-04-18T18:31:49.483Z","updatedAt":"2026-04-23T23:01:54.091Z","lastSeenAt":"2026-04-23T23:01:54.091Z","tsv":"'/api/resource/21':110,158 '/request':15,32 '0.02':14,31,90 '000':131 '0x8335':135 '20':130 '300':145 '402':121 '402 payment api' 'accept':94,150 'access':116,227,237 'across':49 'advertis':218 'ai':8,25,59 'analysi':63 'analyt':53 'api':4,21,41,115,187,220 'application/json':155 'avail':215 'base':17,34,100,137 'base network api' 'categori':51 'challeng':122 'classif':66 'connect':196 'content':202 'control':238 'convers':83 'correspond':162 'data':7,24,52,56 'data-analytics' 'detail':213 'doc':186 'document':181,214 'embed':67 'embeddings' 'enabl':40 'endpoint':12,29,48,86,108,149,168 'entir':229 'estim':77 'exact':142,177 'exampl':210 'exchang':72 'exchange-rates' 'export':57 'expos':44 'extrem':183 'feed':71 'financ':9,26,68 'four':50 'function':178 'gas':76 'generat':84 'geocod':81 'geocoding' 'howev':156 'infrastructur':79 'insight':58 'instant':226 'json-api' 'key':221 'land':173 'learn':61 'limit':224 'list':112 'live':120 'low payment fee' 'lowpaymentfee.com':35 'machin':60 'metric':54 'micropayment api' 'name':167 'network':101 'offer':6,23 'openapi':206 'page':174,191 'path':159 'pay per request api' 'pay-per-request' 'payabl':3,20 'payment':95,126,139,235 'per':91,232 'per-request':231 'platform':5,22,42,217 'post':151 'premium':114 'price':70,88,188 'price-feeds' 'prompt':198 'protocol':105 'quot':75 'rate':73,223 'readm':190 'reli':228 'render':193 'report':55 'request':92,152,233 'request/response':209 'requir':123 'return':118,154 'schema':207 'scheme':140 'second':146 'sentiment':62 'sentiment-analysis' 'site':171 'spars':184 'specif':107 'substant':201 'summar':65 'text':64 'text-classification' 'text-summarization' 'timeout':147 'token':74 'unclear':180 'unit':132 'usdc':97,134 'usdc api' 'usdc-base' 'use':102 'util':11,28,80 'valid':82 'varieti':46 'via':96 'wallet':197 'web3':69 'x402':2,19,39,104,125,234 'x402 api' 'x402-enabled':38 'x402-payable':1,18 'x402-payment'","prices":[{"id":"1602b085-b76a-4441-a40f-fddb8bf045c1","listingId":"a7c840d5-1d97-4831-862e-4756b0cd4468","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/resource/21","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:49.483Z"}],"sources":[{"listingId":"a7c840d5-1d97-4831-862e-4756b0cd4468","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/resource/21","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:49.483Z","lastSeenAt":"2026-04-23T23:01:54.091Z"}],"details":{"listingId":"a7c840d5-1d97-4831-862e-4756b0cd4468","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/resource/21 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints are priced at $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 platform offers endpoints in four categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.","source_url":"https://lowpaymentfee.com"},{"claim":"The 402 challenge for /api/resource/21 requires USDC payment on Base with maxAmountRequired of 20000 and a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/resource/21"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no substantive content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data such as token quotes, gas estimates, and exchange rates","Running utility operations like geocoding, validation, and data conversion on a per-request payment basis","Integrating pay-per-use data analytics into agent workflows"],"bestFor":["AI agents needing keyless, pay-per-request API access","Developers prototyping with low-commitment, no-subscription endpoints","Web3-native applications already operating on the Base network"],"notFor":["High-volume production workloads where per-request pricing becomes expensive","Users who need detailed API documentation and guaranteed SLAs","Applications requiring non-USDC or non-Base payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:01.97Z"},"updatedAt":"2026-04-23T23:01:54.091Z"}}