{"id":"2be6464e-825a-438e-9448-69ff299cde3b","shortId":"kNmkwR","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transactions/233` is listed as \"Premium API Access\" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform advertises multiple API categories including 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 uniformly priced at $0.02 per request.\n\nHowever, the specific functionality behind `/api/v1/transactions/233` is unclear — the description is simply \"Premium API Access\" with no further documentation, input schema, or example responses available. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no additional technical content. Without paying for a request and inspecting the response, the actual data returned by this endpoint remains unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","finance"],"synonyms":["x402 api","pay per call api","usdc api","base network api","micropayment api","lowpaymentfee","low payment fee"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content.","The specific functionality of /api/v1/transactions/233 is unknown; 'Premium API Access' is the only description provided.","No input or output schema is documented; callers cannot know what data to send or expect back without trial and error.","The platform lists many endpoint categories (AI, analytics, finance, etc.) but none have visible documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/233","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/transactions/233","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no example responses, and the actual functionality behind this specific endpoint path is entirely undocumented. The docs pages render only a wallet-connect prompt.","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":"2026-04-19T12:53:19.728Z","embedding":[-0.026275635,-0.04119873,0.036315918,0.016433716,0.015792847,-0.027191162,-0.028045654,0.029342651,0.07098389,-0.0635376,0.024871826,-0.035339355,-0.04156494,-0.03173828,-0.019073486,0.007843018,0.0015134811,0.0017366409,-0.037872314,0.03060913,0.032104492,-0.015068054,-0.04067993,0.021636963,0.0014238358,-0.0121536255,-0.011947632,-0.010719299,-0.016967773,-0.04324341,0.039611816,-0.02331543,-0.0040016174,0.007194519,-0.01361084,-0.016479492,-0.0006790161,0.03201294,0.024658203,-0.0061683655,0.0030517578,-0.057891846,0.0028362274,-0.014656067,-0.048583984,0.001373291,-0.0014591217,-0.02911377,0.00623703,-0.005367279,-0.040100098,-0.014152527,-0.008621216,0.0075035095,0.004447937,0.007270813,-0.0003824234,-0.011482239,0.006225586,0.016555786,-0.020553589,-0.05996704,-0.01713562,0.0016098022,0.0010499954,0.064697266,-0.0057296753,0.038024902,0.004119873,0.07196045,0.03778076,0.048675537,0.032684326,0.018829346,0.002986908,0.0029773712,-0.004550934,0.05203247,-0.013626099,-0.020629883,-0.0034122467,-0.01348114,-0.051757812,0.008911133,-0.017852783,-0.035858154,-0.024337769,0.02267456,-0.01864624,0.016311646,-0.07647705,0.0032596588,-0.0049591064,-0.003364563,0.00083875656,-0.0129776,-0.007572174,0.02168274,-0.010292053,0.01058197,-0.0057640076,-0.04309082,0.031143188,0.015060425,0.02848816,0.043273926,0.019348145,0.025909424,0.00969696,-0.0018882751,-0.019241333,0.022567749,-0.0029697418,-0.0067481995,0.013839722,0.0051994324,-0.0090408325,0.011993408,-0.031341553,0.028533936,-0.05230713,0.047576904,0.006099701,-0.0020961761,-0.00023043156,-0.045776367,-0.010948181,0.02468872,-0.01953125,-0.0055503845,0.019561768,0.020584106,0.023269653,-0.017791748,-0.03805542,0.01612854,-0.023223877,-0.005443573,-0.049957275,-0.032104492,0.041503906,-0.025161743,0.021636963,0.05090332,-0.10235596,-0.007701874,-0.040740967,0.009094238,-0.031433105,-0.0128479,-0.010093689,0.025939941,-0.014167786,-0.01586914,-0.030029297,-0.03427124,0.00315094,0.037902832,-0.019119263,0.04977417,-0.025222778,0.014656067,0.02067566,0.014862061,0.018493652,0.028640747,-0.003396988,-0.07470703,-0.07904053,-0.012710571,-0.0054969788,-0.01966858,-0.034057617,0.017929077,-0.009216309,-0.07763672,-0.02758789,-0.02355957,-0.00020515919,-0.04550171,-0.0059776306,-0.028869629,0.023254395,-0.0048103333,-0.05871582,-0.024047852,-0.031829834,0.05871582,0.030471802,0.020568848,0.027069092,-0.01727295,0.057434082,0.030059814,-0.01889038,-0.016082764,0.014862061,-0.014450073,0.018920898,-0.0011825562,0.013755798,-0.03842163,0.03050232,0.08306885,0.0026741028,-0.023269653,-0.0003888607,-0.06890869,-0.043121338,-0.03555298,0.014205933,0.010467529,-0.011924744,0.04144287,-0.035583496,-0.02633667,0.006126404,0.020370483,0.015029907,0.06100464,0.008522034,-0.008903503,0.0317688,0.021453857,-0.04888916,0.028259277,0.036621094,0.0104904175,-0.033050537,-0.034301758,0.02607727,0.04650879,-0.022613525,0.020324707,-0.008995056,0.03463745,-0.014877319,0.005130768,0.022384644,-0.011581421,-0.023635864,-0.02406311,-0.01889038,0.022201538,0.0061454773,-0.034362793,-0.032043457,-0.07763672,0.047454834,0.044677734,0.037353516,-0.0031776428,-0.00029850006,-0.021759033,-0.012199402,-0.06939697,0.05847168,0.07519531,0.003490448,-0.0043792725,0.029312134,-0.009902954,-0.040405273,0.015640259,-0.025238037,-0.039886475,-0.018737793,0.013084412,-0.04348755,0.0056648254,0.016738892,0.019821167,0.047454834,-0.006504059,-0.046142578,-0.019866943,-0.0055503845,0.0017871857,-0.02368164,0.000014960766,-0.0037612915,0.012382507,0.0118637085,0.00642395,0.014266968,0.0027656555,0.0035057068,-0.0058898926,0.0005812645,-0.016342163,-0.030731201,0.007194519,0.0032920837,-0.051605225,-0.003534317,-0.0063934326,0.072021484,-0.046691895,0.039916992,-0.0137786865,0.010902405,0.049987793,-0.0028133392,-0.04626465,0.0042266846,0.028076172,0.015975952,0.044281006,0.015144348,-0.029724121,-0.014526367,0.07727051,-0.0055618286,-0.0013780594,0.0059661865,0.01612854,0.036499023,-0.014282227,-0.059448242,-0.038848877,-0.004966736,-0.040771484,0.019729614,-0.02822876,0.03439331,-0.011817932,0.0016107559,-0.022491455,-0.0035896301,-0.030792236,0.004962921,-0.004962921,0.008293152,-0.029785156,-0.021026611,0.01826477,0.0021400452,-0.0065078735,0.008422852,0.0463562,0.015686035,-0.0007839203,-0.024337769,-0.035003662,0.0048828125,-0.0047454834,0.01576233,0.010818481,0.024978638,0.049316406,-0.03616333,0.004623413,0.020202637,0.011436462,0.02758789,-0.002357483,0.007507324,-0.064208984,-0.051452637,-0.02355957,-0.045043945,0.023895264,0.012893677,-0.00730896,0.048797607,0.015899658,-0.019119263,-0.03704834,0.019622803,-0.042938232,0.0010375977,0.041290283,-0.018676758,-0.02897644,0.007232666,-0.003944397,0.0027046204,0.041137695,0.01260376,0.040924072,0.07293701,0.046966553,0.012008667,0.02267456,0.0022449493,0.027740479,0.0009899139,-0.030197144,-0.033843994,-0.023910522,0.028411865,-0.018798828,-0.011894226,-0.06982422,0.04699707,0.045288086,0.0960083,0.021606445,0.004875183,0.027435303,-0.014503479,0.020568848,-0.022384644,-0.024917603,-0.027786255,-0.041900635,0.022323608,-0.010284424,-0.011070251,-0.016983032,0.03378296,-0.002439499,0.014427185,-0.022964478,0.048858643,-0.020858765,-0.015899658,0.019989014,0.0115356445,0.049804688,0.060699463,-0.039093018,0.033691406,0.030288696,-0.022460938,0.0029773712,0.042053223,-0.008705139,-0.009017944,-0.04244995,-0.026229858,-0.0062332153,-0.010536194,-0.048950195,0.013885498,0.011077881,0.027816772,0.015991211,-0.0054740906,-0.016189575,0.0021266937,-0.012367249,-0.044555664,0.0011577606,-0.031173706,0.006259918,0.045318604,-0.02168274,-0.0016717911,-0.0025672913,-0.010353088,0.006877899,0.012390137,0.020568848,0.00059843063,-0.04949951,0.030059814,0.009315491,0.0149002075,0.009185791,0.024307251,0.019302368,0.044281006,0.057281494,0.014137268,-0.014038086,-0.06976318,0.01272583,-0.052001953,-0.0064582825,0.02079773,-0.027816772,0.005207062,-0.009864807,-0.023406982,-0.019058228,0.015068054,-0.038085938,0.0059432983,0.024551392,-0.015083313,-0.025314331,-0.052825928,-0.02557373,-0.0026416779,0.064208984,0.02545166,0.020248413,-0.070373535,-0.002784729,0.029525757,0.005809784,0.03665161,-0.01398468,-0.0011806488,-0.014053345,-0.037200928,-0.012374878,-0.01876831,0.025054932,-0.0027256012,-0.005455017,0.02079773,0.0051574707,0.022537231,0.012580872,0.009941101,0.01826477,-0.026260376,-0.004852295,-0.006767273,0.041503906,0.016540527,-0.011940002,-0.05029297,0.03967285,0.0061302185,0.025772095,-0.04067993,-0.0115737915,-0.014579773,0.008628845,0.011947632,-0.012168884,-0.010467529,-0.016647339,-0.05014038,-0.054534912,0.043792725,-0.02432251,0.027297974,0.027679443,0.007194519,0.022842407,-0.0033740997,-0.0069007874,0.01725769,-0.020202637,-0.0050697327,-0.02053833,-0.03201294,-0.02079773,-0.016418457,-0.026992798,0.021270752,-0.01991272,0.01574707,0.005054474,-0.020065308,0.028518677,-0.005493164,0.001991272,0.013671875,0.007083893,0.021942139,0.029800415,0.01335144,-0.04510498,0.013572693,-0.0051956177,0.009262085,-0.0034313202,0.042022705,0.023376465,-0.00705719,-0.0053520203,-0.009422302,-0.028457642,-0.023147583,0.00090646744,0.00932312,0.011146545,0.0024490356,-0.040649414,0.0149002075,0.008331299,-0.030944824,-0.032684326,0.011749268,0.0073661804,-0.03378296,0.02079773,0.035858154,0.049804688,-0.018341064,0.00078964233,0.00010359287,0.03125,0.034088135,0.014472961,-0.011627197,0.022476196,-0.016403198,0.017471313,0.00021445751,-0.009681702,0.019485474,0.003932953,0.024902344,0.022827148,0.010047913,-0.01953125,-0.034820557,7.748604e-7,-0.009475708,-0.020446777,0.029083252,0.018875122,0.034851074,-0.024902344,0.013763428,0.017929077,-0.018585205,-0.014595032,-0.0121154785,0.033081055,-0.015434265,-0.014976501,0.009666443,0.018066406,0.032318115,-0.056884766,-0.0010347366,-0.00116539,0.009735107,-0.014343262,-0.04650879,-0.043792725,0.012016296,0.043670654,0.006210327,0.020385742,0.031219482,0.005203247,0.015419006,0.03262329,-0.00793457,-0.012413025,-0.012229919,-0.04751587,-0.028564453,-0.014228821,0.0027332306,-0.031341553,0.012924194,-0.0033512115,-0.03012085,0.00415802,-0.01675415,-0.0025138855,-0.012718201,0.009239197,0.0423584,0.00242424,0.018966675,-0.006767273,-0.037719727,0.0074043274,0.0030975342,0.018463135,-0.042816162,0.022613525,-0.014205933,-0.0064888,-0.0017623901,0.012649536,0.019439697,0.021209717,0.01374054,0.044952393,-0.03942871,0.04788208,-0.0340271,0.01574707,-0.008560181,-0.037750244,-0.017852783,-0.023254395,-0.018753052,0.037109375,-0.023712158,-0.013084412,-0.034210205,-0.027267456,-0.013076782,-0.053771973,0.016601562,0.037322998,0.031036377,-0.024551392,0.0077209473,-0.0041999817,0.011657715,-0.015777588,0.0073013306,-0.017028809,0.024597168,0.022384644,0.0037574768,-0.0317688,-0.027862549,-0.022735596,-0.0011520386,-0.04650879,-0.0463562,-0.0129852295,0.009895325,-0.005455017,-0.008522034,-0.023086548,-0.033294678,-0.00623703,-0.036468506,0.010635376,0.008377075,0.017990112,0.002216339,-0.02760315,-0.0010576248,0.020629883,-0.0075798035,0.03930664,0.010108948,-0.0016298294,-0.042785645,0.016647339,0.010688782,0.028869629,-0.0042648315,-0.019439697,-0.005332947,-0.02003479,-0.055633545,-0.010971069,-0.002866745,-0.02218628,-0.0050239563,0.0015773773,-0.053466797,-0.0022239685,-0.017425537,0.0023155212,0.02659607,0.007003784,0.02255249,0.00089120865,0.016479492,-0.0113220215,-0.0005402565,-0.033966064,0.019042969,0.010482788,0.0073623657,0.020828247,0.054656982,-0.0031547546,-0.024139404,0.007423401,0.0035858154,0.014678955,-0.021408081,0.011734009,-0.01675415,0.011375427,-0.0075302124,-0.0154418945,-0.041015625,-0.008491516,0.08654785,-0.0059547424,-0.01966858,-0.008125305,-0.012954712,0.017486572,0.028930664,-0.033477783,-0.0054740906,-0.020050049,0.020385742,-0.018188477,0.009849548,0.0058784485,0.015365601,-0.020553589,-0.054656982,-0.0259552,-0.009246826,-0.016296387,-0.05960083,-0.032073975,-0.061157227,0.0052108765,-0.0099105835,-0.02998352,0.0010786057,0.010894775,-0.01802063,-0.08166504,-0.00026226044,0.05203247,0.014335632,0.03213501,-0.010185242,0.02432251,0.02607727,-0.03488159,-0.003396988,0.03274536,-0.02696228,-0.014259338,-0.018463135,0.01890564,-0.01828003,-0.024658203,0.011779785,0.010543823,0.022888184,-0.016967773,0.0071105957,-0.016204834,0.02029419,-0.023239136,0.019958496,-0.019683838,-0.012397766,0.03086853,-0.04458618,0.02482605,0.0041885376,-0.011604309,-0.004009247,0.036102295,0.045166016,-0.035827637,-0.021591187,0.02532959,0.009498596,0.038391113,-0.021255493,0.05154419,0.016174316,-0.018707275,0.014976501,-0.010177612,-0.016586304,-0.020629883,-0.020965576,0.01651001,-0.002872467,0.013999939,-0.031021118,0.0028858185,0.01826477,0.004776001,0.010002136,-0.010177612,-0.027938843,-0.028259277,-0.0012025833,0.004722595,-0.0010099411,-0.0013589859,0.02407837,0.020202637,0.04360962,0.019195557,-0.019927979,0.0028247833,0.027191162,-0.011810303,0.00097084045,0.026229858,-0.000090777874,0.017852783,0.027679443,0.020217896,-0.049346924,-0.017593384,-0.017318726,-0.015625,-0.0068511963,-0.0057868958,-0.013870239,-0.011024475,0.008956909,-0.008842468,-0.034118652,0.0006403923,-0.020645142,-0.04043579,-0.0051879883,-0.021377563,0.024429321,0.0042495728,0.013458252,0.011169434,-0.011291504,0.03970337,-0.005104065,-0.020019531,0.033843994,0.028533936,0.014221191,-0.036590576,-0.0074501038,-0.016937256,-0.010826111,0.0035762787,-0.034179688,0.003490448,0.041870117,-0.013168335,-0.0031032562,0.003929138,0.019058228,-0.00705719,0.005874634,-0.011657715,0.01928711,-0.016830444,0.036193848,-0.045776367,0.026123047,0.013755798,0.000521183,-0.015419006,-0.004146576,-0.031829834,0.01361084,0.008277893,-0.023544312,0.057373047,0.01184845,0.027664185,-0.024139404,-0.019699097,0.0056495667,-0.02734375,-0.020065308,0.025375366,-0.012580872,0.0016994476,0.013191223,-0.027511597,0.039489746,-0.034423828,0.018798828,0.0030345917,0.009140015,-0.0028095245,-0.02255249,-0.005645752,-0.010246277,-0.015914917,0.013313293,-0.0072631836,0.05331421,0.021942139,0.027999878,0.050231934,0.019500732,0.0048828125,-0.03591919,-0.031311035,0.009628296,-0.01651001,0.023544312,-0.019744873,0.057556152,0.03463745,-0.0034542084,0.044555664,0.03050232,0.032714844,0.0051651,0.005962372,-0.021743774,0.019454956,0.0060806274,0.02659607,-0.0033550262,0.033966064,-0.02734375,0.025863647,0.0055770874,0.027145386,-0.035705566,0.029800415,0.074523926,0.01625061,-0.015670776,0.0395813,0.0010051727,-0.015304565,-0.0053215027,-0.023666382,0.050476074,0.004016876,0.04598999,0.055419922,0.020431519,0.0033836365,0.026657104,-0.019638062,-0.021209717,0.06756592,0.025299072,-0.028793335,-0.013702393,-0.008338928,0.012138367,-0.04660034,-0.023269653,0.015838623,-0.010932922,0.013534546,0.0024585724,-0.0041122437,-0.008682251,0.015144348,0.019363403,0.01448822,-0.011444092,0.02684021,0.03237915,-0.0014410019,0.017120361,-0.0045166016,0.019210815,-0.029388428,-0.017166138,0.018173218,0.02986145,-0.011268616,-0.011940002,0.029525757,-0.004917145,0.03768921,0.04550171,-0.023391724,0.0074882507,0.031311035,0.0077552795,-0.0057754517,0.05609131,0.035888672,0.012908936,0.04220581,0.03567505,0.03274536,-0.041168213,0.027450562,-0.002374649,0.0011787415,-0.012580872,-0.0034484863,0.0005555153,-0.014373779,0.017532349,0.0046920776,-0.01675415,0.018814087,0.025619507,-0.0028591156,-0.008270264,-0.004005432,0.011962891,-0.026443481,0.0003323555,0.0022640228,-0.01802063,0.03857422,0.012672424,0.029190063,-0.026321411,0.026519775,0.0021190643,-0.01701355,-0.005355835,0.032470703,-0.033843994,0.0055389404,-0.0027866364,0.0069351196,-0.05960083,0.0060920715,0.02935791,-0.009483337,0.019760132,0.01361084,-0.005344391,-0.008758545,0.027664185,0.013366699,-0.0014162064,-0.019592285,-0.022857666,0.030792236,0.047790527,-0.0029773712,-0.0006494522,-0.026626587,-0.012359619,0.00497818,-0.0013208389,-0.009307861,-0.0132751465,-0.015213013,-0.014839172,0.019012451,0.037200928,0.018844604,0.06011963,-0.01512146,-0.00819397,0.008453369,0.033447266,0.005847931,-0.0041656494,-0.0031547546,0.013626099,-0.013923645,0.05105591,0.032836914,0.011741638,0.03677368,-0.00024068356,-0.015808105,0.0056610107,-0.015174866,0.019439697,-0.010536194,0.003967285,-0.0061149597,0.025222778,-0.018859863,-0.03527832,0.014862061,-0.017562866,-0.02381897,-0.017684937,0.004463196,0.0033187866,0.028564453,0.042266846,0.027267456,-0.018035889,0.06137085,-0.016113281,0.04812622,0.0023994446,-0.012763977,0.05215454,0.01499176,0.040039062,0.014503479,0.018417358,-0.033050537,0.024917603,0.036468506,0.02381897,0.012954712,0.006439209,-0.019454956,0.033355713,-0.0031604767,0.03414917,-0.013587952,0.0019569397,0.020339966,-0.0015277863,-0.007083893,-0.009757996,-0.0030765533,0.013702393,0.04736328,-0.03253174,-0.011665344,-0.021865845,-0.011154175,0.019210815,-0.022583008,0.0069084167,-0.004562378,-0.019180298,0.018203735,-0.020248413,-0.02722168,0.005378723,0.027069092,-0.04714966,-0.014007568,-0.0013751984,0.017044067,-0.020965576,0.03414917,0.016418457,-0.001958847,0.009513855,0.04446411,-0.0079574585,0.028945923,-0.012077332,0.026657104,0.027633667,0.0061416626,-0.020950317,-0.0002696514,0.0036811829,-0.010276794,0.017623901,0.045288086,-0.012962341,0.0067100525,-0.008583069,-0.004688263,0.0009522438,0.010284424,-0.014930725,0.0112838745,-0.011276245,-0.0154953,-0.0007991791,0.009384155,-0.010238647,-0.002231598,0.00076818466,-0.020065308,0.008132935,0.03237915,0.016113281,-0.031021118,-0.010139465,0.008125305,0.014266968,-0.018157959,-0.0102005005,-0.008758545,-0.040863037,0.013259888,0.006752014,0.0132751465,0.010055542,-0.024002075,-0.0012712479,0.02557373,0.011505127,0.0138549805,0.0072784424,0.0032100677,0.012458801,-0.0076141357,-0.0050239563,-0.0031108856,-0.010620117,0.015136719,0.02255249,-0.00091934204,-0.03250122,0.01701355,-0.0121154785,0.018234253,0.002948761,-0.01651001,0.012763977,-0.00573349,-0.0040740967,0.0030975342,0.0075149536,-0.015159607,-0.012626648,-0.015731812,0.030807495,0.058044434,-0.012138367,-0.010734558,0.02381897,0.016021729,0.019302368,0.03829956,0.011192322,0.040802002,0.022644043,-0.015182495,-0.023513794,0.030426025,-0.0119018555,-0.01940918,0.007881165,-0.013404846,-0.029159546,0.017150879,0.013633728,0.00049495697,-0.032714844,-0.003522873,-0.007282257,-0.014671326,0.01826477,-0.021362305,0.009559631,-0.025772095,-0.017715454,0.007507324,-0.025527954,-0.046447754,-0.022872925,-0.0016174316,-0.00699234,-0.0541687,0.0017194748,-0.025894165,0.014785767,-0.034362793,-0.0033340454,-0.00422287,0.009780884,-0.018630981,-0.011268616,0.009017944,0.030136108,0.024459839,0.013557434,0.02670288,-0.028015137,-0.022018433,-0.026245117,0.009429932,-0.014427185,0.024139404,-0.003332138,0.027526855,0.029052734,-0.0138549805,-0.007232666,-0.0104522705,-0.0067214966,-0.018112183,-0.025817871,-0.026000977,0.02355957,0.015350342,-0.010536194,-0.017288208,0.049682617,-0.025466919,-0.02027893,0.0357666,0.04296875,0.0064811707,0.027175903,-0.020889282,-0.005420685,-0.014091492,-0.0012598038,-0.012428284,0.0007123947,0.00021624565,0.007774353,-0.0067863464,0.006362915,0.021499634,-0.015777588,-0.0026721954,0.030166626,0.0021133423,-0.009170532,0.03552246,0.00466156,0.000890255,-0.01701355,-0.007297516,0.023391724,0.048919678,0.012916565,0.005367279,-0.009765625,-0.00053977966,-0.014968872,0.016906738,0.012435913,-0.01776123,-0.04812622,-0.017837524,-0.033111572,0.021224976,0.0016231537,0.011238098,-0.0022392273,0.023590088,-0.010917664,-0.02458191,-0.02708435,0.03591919,0.006778717,-0.01838684,-0.010635376,0.012680054,0.014190674,-0.04345703,0.00027489662,-0.043762207,-0.032958984,-0.009742737,-0.025772095,0.03086853,0.013191223,-0.0031738281,-0.007003784,-0.0115737915,-0.003376007,0.0047912598,0.024673462,-0.01525116,-0.005622864,0.0345459,0.023666382,-0.016616821,0.025024414,-0.012916565,0.007255554,0.01109314,-0.008842468,0.010688782,-0.023880005,0.020828247,-0.009735107,-0.001499176,0.031677246,-0.006526947,0.00818634,-0.039245605,0.0035133362,0.0010118484,-0.007926941,0.04147339,-0.03161621,-0.019958496,0.009857178,-0.026351929,-0.03201294,0.00422287,0.012664795,0.026000977,-0.0047340393,0.051361084,-0.015060425,-0.011566162,0.023376465,0.015510559,-0.017837524,-0.0032958984,0.02859497,-0.000813961,0.0011692047,-0.0025596619,-0.013664246,-0.02960205,-0.009429932,0.01651001,-0.006290436,-0.012710571,0.032592773,0.021957397,0.049835205,-0.004547119,0.02142334,0.0077934265,0.010108948,0.029281616,0.00075387955,0.061462402,-0.0099487305,-0.023040771,0.006919861,0.0027866364,-0.027679443,0.0054512024,-0.001698494,0.0055656433,-0.044769287,0.013404846,-0.0015897751,0.022888184,-0.022384644,0.015136719,-0.024627686,-0.013092041,-0.038635254,-0.007881165,-0.027923584,0.006000519,0.028182983,0.012123108,0.027511597,-0.0022640228,-0.025161743,0.012451172,0.044311523,-0.01335144,-0.029953003,-0.020080566,0.009552002,0.0049057007,0.017364502,0.0079956055,-0.016204834,-0.015853882,0.0116119385,-0.0154418945,0.008834839,-0.00017857552,0.014862061,-0.002231598,-0.0061531067,-0.011978149,0.02281189,-0.0023059845,-0.006965637,0.0056037903,0.0053138733,0.033050537,0.030700684,-0.01084137,0.016525269,0.019805908,-0.04284668,0.057891846,0.002609253,0.023788452,-0.021484375,0.0025806427,-0.0340271,-0.028411865,-0.013252258,0.009513855],"createdAt":"2026-04-18T18:59:34.876Z","updatedAt":"2026-04-23T16:07:44.593Z","lastSeenAt":"2026-04-23T16:07:44.593Z","tsv":"'/api/v1/transactions/233':56,160 '/request':13,28 '0.02':12,27,80,152 '000':74 '20':73 '402':66 'accept':46 'access':62,169 'actual':211 'addit':198 'advertis':108 'ai':120 'analysi':124 'analyt':114 'api':5,20,38,61,84,110,168,184 'attach':93 'avail':179 'base':8,23,51,75 'base network api' 'behind':159 'broader':106 'call':4,19,82 'caller':91 'categori':111 'challeng':67 'classif':127 'connect':193 'content':200 'convers':144 'data':113,117,212 'descript':164 'doc':181 'document':173 'embed':128 'endpoint':55,147,216 'estim':138 'exampl':177 'exchang':133 'export':118 'feed':132 'financ':129 'function':158 'gas':137 'generat':145 'geocod':142 'header':98 'howev':155 'i.e':79 'includ':112 'infrastructur':140 'input':174 'insight':119 'inspect':207 'json-response' 'key':85 'learn':122 'limit':88 'list':58 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':121 'metric':115 'micropayment api' 'multipl':109 'network':9,24,52 'no-api-key' 'page':185 'pay':2,17,35,202 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,69,97,103 'per':3,18,36,81,153 'platform':6,21,39,107 'post-method' 'premium':60,167 'price':131,150,182 'prompt':195 'proof':104 'protocol':44 'quot':136 'rate':87,134 'remain':217 'render':190 'report':116 'request':37,154,205 'requir':68,90 'respons':178,209 'return':64,213 'schema':175 'sentiment':123 'simpli':92,166 'site':188 'specif':54,157 'summar':126 'technic':199 'text':125 'token':135 'unclear':162 'uniform':149 'unit':76 'unknown':218 'usdc':15,30,47,78 'usdc api' 'usdc-base-network' 'use':41 'util':141 'valid':101,143 'via':10,25 'wallet':194 'web3':130 'without':201 'x':96 'x-payment':95 'x402':11,26,43,102 'x402 api' 'x402-payment'","prices":[{"id":"c38810af-8f32-4ce7-ae79-d0e84d4acea4","listingId":"2be6464e-825a-438e-9448-69ff299cde3b","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/transactions/233","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:59:34.876Z"}],"sources":[{"listingId":"2be6464e-825a-438e-9448-69ff299cde3b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/233","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:34.876Z","lastSeenAt":"2026-04-23T16:07:44.593Z"}],"details":{"listingId":"2be6464e-825a-438e-9448-69ff299cde3b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/233 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/233"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/233"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Testing x402 protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need instant, keyless API access via crypto micropayments","Low-volume consumers who prefer pay-per-use over subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.899Z"},"updatedAt":"2026-04-23T16:07:44.593Z"}}