{"id":"943d2de0-6067-4bfc-a8ef-89f19321370b","shortId":"y5WCbL","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/382` 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. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com platform offers 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. However, the specific endpoint being listed here (`/api/v1/transactions/382`) is described only as \"Premium API Access\" with no further documentation on what data or functionality it returns.\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 description of what the `/api/v1/transactions/382` endpoint actually does beyond its generic title. The endpoint is live and responds with a valid x402 challenge, but the lack of documentation makes it difficult to know what payload to send or what response to expect.","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 micropayment API","Base network API","lowpaymentfee","crypto-paid API","402 payment API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format for this endpoint","The purpose of /api/v1/transactions/382 is unclear — 'Premium API Access' is a generic label with no specifics","Cannot verify what data or service is returned after payment without actually paying"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/382","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/382","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 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality ('Premium API Access') is completely undescribed. The docs pages are empty beyond 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":"2026-04-19T13:23:19.546Z","embedding":[-0.032928467,-0.03161621,0.030166626,0.010971069,0.015106201,-0.021942139,-0.026321411,0.017852783,0.07397461,-0.051879883,0.023788452,-0.045684814,-0.039489746,-0.028793335,-0.014778137,0.00630188,0.0012245178,-0.0022697449,-0.03881836,0.027069092,0.03918457,-0.024169922,-0.028579712,0.020477295,0.005672455,-0.009315491,-0.006340027,-0.006778717,-0.023971558,-0.037750244,0.048553467,-0.027328491,-0.0028381348,0.0018568039,-0.0073280334,-0.012817383,0.0018358231,0.03152466,0.030822754,-0.007434845,0.003944397,-0.058166504,0.008338928,-0.019073486,-0.053466797,0.0008006096,0.011238098,-0.025604248,0.010826111,-0.008239746,-0.04510498,-0.0079956055,-0.009132385,0.016113281,0.003604889,0.005168915,-0.00010985136,-0.01713562,0.0014371872,0.017562866,-0.018920898,-0.058258057,-0.014907837,-0.0069999695,0.009017944,0.0513916,-0.0074272156,0.037994385,0.00055360794,0.06890869,0.030929565,0.04989624,0.0345459,0.014595032,0.005886078,-0.0066223145,-0.00035381317,0.046539307,-0.012870789,-0.030563354,-0.0055885315,-0.0050239563,-0.06161499,0.003856659,-0.016342163,-0.04284668,-0.024459839,0.017944336,-0.02178955,0.018951416,-0.0791626,0.0031433105,-0.0021781921,-0.00008779764,0.0013208389,-0.014846802,-0.008682251,0.028366089,-0.0034332275,0.010826111,-0.011741638,-0.040100098,0.024337769,0.0060653687,0.036743164,0.049346924,0.019058228,0.017196655,0.016448975,-0.005466461,-0.032348633,0.01687622,-0.0043945312,-0.008140564,0.009124756,0.0025577545,-0.01525116,0.017654419,-0.021743774,0.026931763,-0.05328369,0.051849365,0.0063819885,-0.00042533875,0.0040283203,-0.048065186,-0.007785797,0.023529053,-0.029846191,-0.0076065063,0.024032593,0.015899658,0.020584106,-0.016021729,-0.037353516,0.028015137,-0.021957397,-0.0032653809,-0.0501709,-0.02204895,0.035614014,-0.027542114,0.009796143,0.04095459,-0.099365234,-0.0052452087,-0.037109375,0.009689331,-0.0256958,-0.005771637,0.0069389343,0.026245117,-0.010314941,-0.016479492,-0.026992798,-0.040496826,0.008972168,0.03692627,-0.01512146,0.041107178,-0.030883789,0.01838684,0.026641846,0.011291504,0.014801025,0.021148682,0.0011415482,-0.076538086,-0.07910156,-0.019622803,0.0045814514,-0.021453857,-0.040527344,0.014221191,-0.018157959,-0.06665039,-0.01789856,-0.018951416,0.007987976,-0.047302246,-0.005001068,-0.032989502,0.025512695,-0.000012755394,-0.061065674,-0.040100098,-0.030776978,0.053955078,0.023651123,0.025421143,0.018661499,-0.0037975311,0.062438965,0.021118164,-0.013206482,-0.011878967,0.01914978,-0.022369385,0.023239136,-0.0020523071,0.01586914,-0.033599854,0.025177002,0.07421875,0.0010662079,-0.029205322,-0.0066833496,-0.06732178,-0.04107666,-0.03778076,0.022399902,0.004322052,-0.009399414,0.03857422,-0.028686523,-0.034729004,0.005126953,0.0143966675,0.025543213,0.060394287,0.013908386,-0.0030956268,0.03591919,0.017807007,-0.047729492,0.042907715,0.03729248,0.00969696,-0.025817871,-0.04611206,0.03237915,0.046173096,-0.029953003,0.006706238,-0.012802124,0.021850586,-0.015068054,-0.0028648376,0.01701355,-0.010917664,-0.019683838,-0.022384644,-0.020004272,0.022094727,0.005542755,-0.039154053,-0.038726807,-0.07501221,0.05355835,0.03616333,0.045837402,0.0027561188,0.0016965866,-0.02230835,-0.014526367,-0.0736084,0.057525635,0.066345215,-0.0013179779,-0.007659912,0.03253174,-0.0040016174,-0.041900635,0.0038700104,-0.025436401,-0.028717041,-0.027679443,0.0054359436,-0.044799805,0.00944519,0.02432251,0.031143188,0.054351807,-0.004058838,-0.05178833,-0.02041626,-0.0064811707,-0.000019073486,-0.023666382,0.006298065,-0.008270264,0.013259888,0.0070991516,0.00573349,0.012786865,0.00995636,-0.0030593872,-0.010948181,0.009788513,-0.009391785,-0.032989502,0.01940918,-0.0059509277,-0.05014038,-0.0001809597,-0.006778717,0.067993164,-0.049194336,0.039978027,-0.01763916,0.0025730133,0.05557251,-0.009140015,-0.04748535,0.0053749084,0.024917603,0.014472961,0.04107666,0.010231018,-0.027755737,-0.02017212,0.0736084,-0.014167786,-0.003627777,0.009780884,0.020996094,0.045074463,-0.006538391,-0.062286377,-0.04046631,-0.005722046,-0.041809082,0.026550293,-0.020477295,0.031219482,-0.01687622,0.0026016235,-0.020355225,0.00018298626,-0.036712646,0.008766174,-0.013168335,0.0073776245,-0.024902344,-0.027328491,0.017715454,0.014503479,-0.007827759,0.016571045,0.04852295,0.019561768,-0.0068473816,-0.029129028,-0.019515991,-0.008628845,-0.006877899,0.021652222,0.017211914,0.026000977,0.055145264,-0.03149414,0.005466461,0.025939941,0.01953125,0.026153564,-0.008872986,-0.0025520325,-0.06274414,-0.0473938,-0.025024414,-0.04434204,0.027175903,0.008155823,-0.009048462,0.0552063,0.014709473,-0.017227173,-0.039978027,0.02394104,-0.04937744,-0.003068924,0.040252686,-0.021148682,-0.018951416,0.0044021606,-0.003490448,0.010124207,0.034362793,0.011268616,0.038146973,0.06951904,0.041809082,0.01348114,0.022018433,-0.002204895,0.02947998,0.005443573,-0.024246216,-0.033325195,-0.018218994,0.03741455,-0.027359009,-0.023498535,-0.06866455,0.05444336,0.04562378,0.07775879,0.019058228,0.008720398,0.021072388,-0.010871887,0.011077881,-0.02230835,-0.009941101,-0.026397705,-0.04446411,0.02998352,-0.0075263977,-0.0043792725,-0.017593384,0.0335083,0.0006656647,0.016662598,-0.029190063,0.043029785,-0.020645142,-0.015304565,0.024002075,0.014564514,0.04953003,0.06149292,-0.047790527,0.03366089,0.02671814,-0.021621704,0.015159607,0.03665161,-0.0135269165,-0.011383057,-0.048065186,-0.025543213,-0.013473511,-0.012702942,-0.047424316,0.0065574646,0.011398315,0.018325806,0.020996094,-0.007003784,-0.023849487,0.004169464,-0.015388489,-0.047668457,0.0065460205,-0.03213501,0.009185791,0.040924072,-0.013046265,0.00011181831,0.0010700226,-0.0037670135,0.0041885376,0.020904541,0.018356323,0.00598526,-0.04647827,0.025405884,0.0021266937,0.014022827,0.0115356445,0.027938843,0.019042969,0.035827637,0.053741455,0.019042969,-0.015464783,-0.06713867,0.01586914,-0.05105591,-0.004081726,0.023345947,-0.028656006,-0.00028657913,-0.01146698,-0.0284729,-0.01537323,0.014457703,-0.03164673,0.0018024445,0.02268982,-0.021606445,-0.027786255,-0.057617188,-0.028503418,-0.0022087097,0.057250977,0.020858765,0.025238037,-0.0680542,-0.0032520294,0.024749756,0.005142212,0.039001465,-0.015159607,-0.007980347,-0.019042969,-0.040863037,-0.018356323,-0.020721436,0.025314331,-0.009262085,-0.014022827,0.019485474,0.0037631989,0.021987915,0.009979248,0.009307861,0.015335083,-0.020339966,-0.0062408447,-0.0035629272,0.038726807,0.02267456,-0.022598267,-0.051239014,0.040527344,0.011756897,0.03616333,-0.046295166,-0.010253906,-0.010787964,0.0055618286,0.010421753,-0.010688782,-0.0041923523,-0.011413574,-0.04562378,-0.0619812,0.04284668,-0.019546509,0.029800415,0.03491211,0.010803223,0.027648926,-0.011520386,-0.0037879944,0.009483337,-0.029708862,-0.007118225,-0.028625488,-0.0317688,-0.019805908,-0.017822266,-0.027069092,0.02394104,-0.021850586,0.018692017,0.01109314,-0.021484375,0.032104492,-0.0013532639,-0.00014710426,0.016464233,0.0007324219,0.022415161,0.025756836,0.012748718,-0.05203247,0.02154541,0.0019130707,0.015014648,-0.0075531006,0.04727173,0.03060913,-0.011054993,-0.0073432922,-0.0099105835,-0.02192688,-0.025619507,0.0007791519,0.012145996,0.012741089,0.00390625,-0.04168701,0.0206604,0.007118225,-0.034179688,-0.03475952,0.0129470825,0.017166138,-0.035339355,0.014854431,0.026321411,0.04824829,-0.017211914,0.00053310394,0.0018692017,0.024551392,0.03857422,0.016571045,-0.008644104,0.024490356,-0.01612854,0.017593384,-0.0022392273,-0.014091492,0.009384155,0.00089788437,0.019042969,0.025375366,0.0061912537,-0.019042969,-0.03668213,0.00031256676,-0.01209259,-0.025909424,0.031463623,0.020233154,0.036590576,-0.020889282,0.016082764,0.016967773,-0.020721436,-0.019760132,-0.011169434,0.037322998,-0.018798828,-0.0046653748,0.014022827,0.01727295,0.028015137,-0.06347656,-0.006084442,-0.0018939972,0.010520935,-0.016708374,-0.04714966,-0.040985107,-0.005908966,0.045074463,0.010375977,0.020751953,0.03552246,0.004753113,0.010238647,0.024475098,-0.0053215027,-0.013877869,-0.019302368,-0.046569824,-0.025741577,-0.012207031,0.0058059692,-0.032958984,0.013809204,-0.0022735596,-0.032196045,0.010055542,-0.021316528,-0.002117157,-0.012916565,0.018585205,0.040985107,0.010559082,0.020202637,-0.010475159,-0.039154053,0.0019083023,0.006500244,0.023391724,-0.044189453,0.018661499,-0.016693115,-0.01096344,-0.0013284683,0.011131287,0.023895264,0.024780273,0.0019464493,0.031433105,-0.04345703,0.04675293,-0.035064697,0.008720398,-0.0067329407,-0.040100098,-0.020706177,-0.024169922,-0.015357971,0.03677368,-0.029342651,-0.0062026978,-0.03692627,-0.0390625,-0.020248413,-0.06021118,0.012542725,0.039489746,0.036193848,-0.030807495,0.0008649826,-0.010223389,0.0076408386,-0.013969421,0.0010375977,-0.013160706,0.03253174,0.02204895,0.004627228,-0.03668213,-0.023834229,-0.02519226,-0.01108551,-0.044677734,-0.05105591,-0.007888794,0.0065956116,-0.011672974,-0.0049438477,-0.024917603,-0.033081055,-0.004840851,-0.032806396,0.0073280334,0.0015230179,0.022247314,-0.00033140182,-0.026641846,-0.0022583008,0.016616821,-0.009376526,0.03314209,0.01309967,-0.009811401,-0.051818848,0.012214661,0.013572693,0.02684021,-0.00007122755,-0.021865845,-0.013381958,-0.018203735,-0.048919678,-0.010536194,-0.006126404,-0.023223877,-0.017333984,0.0002808571,-0.051330566,-0.0014152527,-0.01966858,0.0023937225,0.026397705,0.0056610107,0.014755249,-0.008720398,0.015975952,-0.0051078796,0.0028305054,-0.030166626,0.017074585,0.010864258,0.0050621033,0.024856567,0.052459717,-0.007835388,-0.026855469,0.008407593,-0.0014743805,0.0079422,-0.016738892,0.016525269,-0.016418457,0.006752014,-0.0087890625,-0.0101623535,-0.042755127,-0.0011434555,0.088256836,-0.008781433,-0.010360718,-0.0158844,-0.0154418945,0.017868042,0.03274536,-0.03173828,-0.0044898987,-0.028717041,0.02508545,-0.016464233,0.015014648,0.0043182373,0.022079468,-0.01637268,-0.05456543,-0.019165039,-0.013946533,-0.0072631836,-0.067871094,-0.026748657,-0.06677246,0.0057411194,-0.0038337708,-0.024353027,0.0056266785,0.009552002,-0.015975952,-0.084472656,0.0014133453,0.054718018,0.012123108,0.028259277,-0.006706238,0.026626587,0.025009155,-0.03274536,-0.0057373047,0.031036377,-0.027252197,-0.01965332,-0.022964478,0.023605347,-0.012290955,-0.017166138,0.005393982,0.00030303,0.011146545,-0.008903503,0.0067710876,-0.013999939,0.017807007,-0.019058228,0.01725769,-0.020065308,-0.01436615,0.036834717,-0.049926758,0.028915405,0.006668091,-0.013412476,-0.0032958984,0.038726807,0.042877197,-0.03591919,-0.01361084,0.016143799,0.015991211,0.034088135,-0.020599365,0.050842285,0.01146698,-0.00217247,0.01171875,-0.011199951,-0.01638794,-0.024215698,-0.023773193,0.011672974,0.0020866394,0.011856079,-0.025878906,-0.006801605,0.01852417,0.0065956116,0.007896423,-0.0067443848,-0.020111084,-0.030593872,-0.002161026,0.0002861023,0.0058021545,-0.0017147064,0.026062012,0.028121948,0.03970337,0.0055885315,-0.019515991,0.0062561035,0.027679443,-0.012382507,0.0021209717,0.021911621,0.0027866364,0.022964478,0.016113281,0.013046265,-0.04272461,-0.020385742,-0.024475098,-0.010978699,-0.004016876,-0.010955811,-0.012893677,-0.0033836365,0.0027103424,-0.0079574585,-0.02796936,0.005519867,-0.024139404,-0.028045654,-0.0093307495,-0.021820068,0.029296875,0.017181396,0.0028915405,0.011619568,-0.01146698,0.03704834,-0.0052490234,-0.023162842,0.027359009,0.02708435,0.017349243,-0.036865234,-0.0011940002,-0.016937256,-0.0066375732,0.0049934387,-0.031707764,0.012138367,0.043945312,-0.017593384,-0.0037937164,0.006122589,0.022537231,-0.008041382,0.011299133,-0.008857727,0.02279663,-0.0090789795,0.037872314,-0.052459717,0.031173706,0.014404297,0.0033187866,-0.013214111,-0.0077781677,-0.02368164,0.021820068,0.012542725,-0.01436615,0.05645752,0.009429932,0.027252197,-0.023132324,-0.02810669,0.008491516,-0.029129028,-0.019256592,0.018737793,-0.006351471,0.00680542,0.017944336,-0.026977539,0.032470703,-0.037750244,0.017868042,0.0014410019,0.009628296,-0.0053634644,-0.018981934,-0.00022697449,-0.015350342,-0.01852417,0.0033092499,-0.009208679,0.0569458,0.017349243,0.02973938,0.048461914,0.020141602,0.0050735474,-0.040374756,-0.033416748,0.0058898926,-0.010475159,0.016464233,-0.024642944,0.050842285,0.045288086,0.0015449524,0.04647827,0.03137207,0.034179688,0.0087890625,0.0014648438,-0.01576233,0.01512146,-0.0004131794,0.027038574,0.0025196075,0.032440186,-0.033691406,0.02960205,0.015548706,0.033294678,-0.02394104,0.032592773,0.07299805,0.023635864,-0.012718201,0.035369873,-0.008621216,-0.011619568,-0.008766174,-0.01914978,0.054016113,0.003501892,0.043701172,0.059326172,0.015670776,0.0059814453,0.023590088,-0.020202637,-0.018707275,0.06201172,0.02444458,-0.02583313,-0.013191223,-0.012245178,0.011772156,-0.044158936,-0.019622803,0.023422241,-0.018173218,0.015159607,-0.008224487,-0.002702713,-0.0107421875,0.005958557,0.013183594,0.011062622,-0.007335663,0.027816772,0.036102295,0.007423401,0.021102905,-0.006706238,0.023605347,-0.0262146,-0.021362305,0.021392822,0.024368286,-0.008178711,-0.010147095,0.024124146,0.0074768066,0.038726807,0.048034668,-0.015548706,0.0073165894,0.027862549,0.013137817,-0.00044488907,0.050628662,0.035736084,0.012542725,0.03756714,0.031951904,0.03173828,-0.04196167,0.028945923,-0.0050735474,-0.000600338,-0.01878357,-0.007713318,0.006313324,-0.017440796,0.020523071,-0.0030117035,-0.015853882,0.021743774,0.025848389,-0.00699234,-0.007896423,-0.009208679,0.014076233,-0.028076172,-0.0031414032,0.010826111,-0.01133728,0.0368042,0.006298065,0.026947021,-0.027816772,0.023498535,-0.002067566,-0.017166138,-0.0039596558,0.024887085,-0.030883789,-0.000047385693,-0.0033092499,0.0069999695,-0.0635376,0.0031166077,0.027923584,-0.010871887,0.0178833,0.016204834,-0.0026302338,-0.00749588,0.03173828,0.015571594,-0.0051345825,-0.009094238,-0.018966675,0.02520752,0.045928955,-0.00063180923,-0.00041270256,-0.03048706,-0.009338379,0.0006952286,-0.0041275024,-0.0032196045,-0.013145447,-0.020217896,-0.013946533,0.023345947,0.03668213,0.01687622,0.0619812,-0.0259552,-0.010002136,0.011131287,0.029342651,0.00025224686,-0.0060653687,0.0017700195,0.0155181885,-0.017120361,0.05529785,0.025527954,0.015151978,0.031555176,0.0022563934,-0.017150879,0.0047302246,-0.015159607,0.026123047,-0.008583069,0.002319336,0.00043320656,0.033325195,-0.019607544,-0.04034424,0.011390686,-0.018859863,-0.02684021,-0.011016846,0.0074501038,0.0011692047,0.022018433,0.03564453,0.024536133,-0.019805908,0.06213379,-0.016937256,0.04586792,0.0036621094,-0.010597229,0.049468994,0.013015747,0.04031372,0.0134887695,0.017349243,-0.040618896,0.02418518,0.031433105,0.025283813,0.014503479,0.004837036,-0.018661499,0.039398193,-0.0034637451,0.03338623,-0.008575439,-0.0019721985,0.026626587,-0.008964539,-0.018310547,-0.00907135,-0.007396698,0.014007568,0.044311523,-0.034301758,-0.008796692,-0.031463623,-0.012229919,0.019302368,-0.019760132,-0.00039362907,-0.0039253235,-0.016571045,0.010658264,-0.016952515,-0.026763916,0.0075798035,0.022537231,-0.051330566,-0.0076789856,0.005584717,0.019363403,-0.018585205,0.03555298,0.024932861,0.00033783913,0.0058555603,0.050079346,-0.00579834,0.033996582,-0.008743286,0.026412964,0.032043457,-0.00083971024,-0.024291992,0.0010499954,0.004840851,-0.01687622,0.020721436,0.040039062,-0.015640259,0.009162903,-0.0073776245,-0.0022258759,0.0044288635,0.0036411285,-0.006931305,0.012275696,-0.01083374,-0.01612854,-0.0014009476,0.004524231,-0.0031089783,0.003545761,-0.0019416809,-0.021087646,0.0054016113,0.03744507,0.014816284,-0.034332275,-0.0056610107,0.005558014,0.0047454834,-0.01625061,-0.011810303,-0.0051078796,-0.03555298,0.015083313,0.013259888,0.016555786,0.013549805,-0.02268982,-0.0028018951,0.023605347,0.0060310364,0.01953125,0.003944397,-0.002714157,0.016113281,-0.009857178,0.00035071373,-0.0066337585,-0.010505676,0.00983429,0.018478394,0.005279541,-0.031341553,0.0152282715,-0.009239197,0.018661499,0.0048675537,-0.009765625,0.018981934,-0.0065345764,-0.0012664795,0.0019397736,0.009048462,-0.0074539185,-0.016967773,-0.00894165,0.038482666,0.060546875,-0.009925842,-0.007801056,0.020736694,0.017166138,0.016830444,0.036621094,0.007751465,0.038513184,0.03161621,-0.015777588,-0.025726318,0.026535034,-0.0138549805,-0.029006958,0.012069702,-0.018478394,-0.019714355,0.01763916,0.006954193,0.0037174225,-0.03375244,-0.007751465,-0.008117676,-0.015045166,0.018447876,-0.009841919,0.0063934326,-0.026885986,-0.01576233,0.017944336,-0.023880005,-0.043151855,-0.023071289,-0.009315491,-0.010299683,-0.053619385,0.006690979,-0.023971558,0.012313843,-0.03414917,0.0057144165,-0.0046424866,0.01260376,-0.011108398,-0.017807007,0.010360718,0.0284729,0.028549194,0.010375977,0.022949219,-0.033691406,-0.017745972,-0.02444458,0.008552551,-0.0143585205,0.03149414,-0.0016889572,0.031311035,0.01965332,-0.01146698,-0.0049057007,-0.0050735474,-0.0052757263,-0.015991211,-0.016662598,-0.024108887,0.021026611,0.016662598,-0.015403748,-0.012809753,0.04244995,-0.025924683,-0.021499634,0.032196045,0.03277588,0.009277344,0.029556274,-0.021453857,0.0031738281,-0.017471313,-0.0010156631,-0.018157959,0.0024471283,-0.001502037,0.010231018,-0.004951477,0.0076408386,0.016967773,-0.010803223,-0.000102221966,0.036590576,0.007080078,-0.00409317,0.032958984,0.005203247,0.0053596497,-0.014251709,0.00086402893,0.020706177,0.04727173,0.009132385,0.0040779114,-0.0109939575,0.005718231,-0.01576233,0.010505676,0.017822266,-0.022003174,-0.048583984,-0.016830444,-0.0259552,0.027618408,-0.008728027,0.011116028,-0.013214111,0.022445679,-0.008331299,-0.034698486,-0.028900146,0.030700684,0.01235199,-0.016403198,-0.010070801,0.012580872,0.009941101,-0.036132812,0.00022184849,-0.046051025,-0.035064697,-0.005001068,-0.02116394,0.029296875,0.0072250366,-0.007751465,-0.006134033,-0.011024475,-0.0017328262,0.0016431808,0.019226074,-0.0096588135,-0.0064315796,0.027862549,0.021911621,-0.010116577,0.025650024,-0.0071029663,0.0064697266,0.00374794,-0.017608643,0.015426636,-0.020187378,0.026519775,-0.0121536255,-0.012268066,0.023239136,-0.007659912,0.019927979,-0.041748047,0.0047569275,-0.0037574768,-0.012916565,0.037719727,-0.032836914,-0.018493652,0.004798889,-0.021606445,-0.028121948,0.0027999878,0.015388489,0.029556274,-0.006412506,0.045959473,-0.01586914,-0.012084961,0.011421204,0.01776123,-0.012313843,-0.001452446,0.030639648,-0.0016508102,0.00055265427,-0.0010004044,-0.01727295,-0.03173828,-0.011436462,0.016464233,-0.008255005,-0.0031642914,0.032806396,0.018356323,0.04147339,-0.0013866425,0.025497437,0.010375977,0.003358841,0.023452759,0.0019197464,0.057373047,0.0015268326,-0.028182983,0.010253906,0.0020198822,-0.01939392,0.008018494,-0.0051460266,-0.00088977814,-0.040771484,0.014778137,-0.0000538826,0.02104187,-0.017227173,0.0121154785,-0.019042969,-0.011665344,-0.033843994,-0.0026721954,-0.032196045,0.0062294006,0.0309906,0.0022830963,0.029922485,0.000063061714,-0.022003174,0.015449524,0.04611206,-0.0037136078,-0.022018433,-0.023071289,0.00831604,-0.0020141602,0.014709473,0.005809784,-0.028839111,-0.020004272,0.0119018555,-0.0211792,0.012306213,-0.005355835,0.018539429,0.0037708282,-0.008773804,-0.010276794,0.024337769,-0.009048462,-0.0011882782,0.01637268,0.0072021484,0.02696228,0.031341553,-0.016174316,0.016693115,0.020706177,-0.045440674,0.057617188,-0.003917694,0.024856567,-0.025939941,0.0015563965,-0.036132812,-0.020950317,-0.019439697,0.004688263],"createdAt":"2026-04-18T19:26:27.691Z","updatedAt":"2026-04-23T09:31:44.620Z","lastSeenAt":"2026-04-23T09:31:44.620Z","tsv":"'/api':191 '/api/v1/transactions/382':56,166,221 '/docs':190 '/pricing':192 '/readme':194 '/request':13,28 '0.02':12,27,80,156 '000':74 '20':73 '402':66 '402 payment API' 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,94,173 'across':115 'actual':223 'advertis':85 'ai':125 'analysi':129 'analyt':119 'api':5,20,38,61,87,172 'attach':97 'base':8,23,51,75 'beyond':225 'broader':110 'call':4,19,82 'caller':95 'categori':117 'challeng':67,239 'classif':132 'connect':200 'content':206 'convers':149 'crypto-paid API' 'data':118,122,180 'describ':168 'descript':217 'difficult':247 'document':177,185,244 'embed':133 'endpoint':55,114,152,162,222,230 'estim':143 'exampl':214 'exchang':138 'expect':258 'export':123 'extrem':187 'feed':137 'financ':134 'four':116 'function':182 'gas':142 'generat':150 'generic':227 'geocod':147 'header':102 'howev':159 'i.e':79 'infrastructur':145 'insight':124 'instant':93 'json-response' 'key':88 'know':249 'lack':242 'learn':127 'limit':91 'list':58,164 'live':232 'lowpaymentfee' 'lowpaymentfee.com':31,111 'machin':126 'make':245 'metric':120 'network':9,24,52 'no-api-key' 'offer':113 'openapi':210 'page':195 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payload':251 'payment':48,69,101,107 'per':3,18,36,81,157 'platform':6,21,39,84,112 'post-method' 'premium':60,171 'price':136,154 'prompt':202 'proof':108 'protocol':44 'quot':141 'rate':90,139 'render':197 'report':121 'request':37,158 'request/response':213 'requir':68 'respond':234 'respons':256 'return':64,184 'schema':211 'send':253 'sentiment':128 'simpli':96 'spars':188 'specif':54,161 'substant':205 'summar':131 'text':130 'titl':228 'token':140 'unit':76 'usdc':15,30,47,78 'usdc-base-network' 'use':41 'util':146 'valid':105,148,237 'via':10,25 'wallet':201 'web3':135 'x':100 'x-payment':99 'x402':11,26,43,106,238 'x402 API' 'x402-payment'","prices":[{"id":"bc3f118d-7f7f-4e96-bd9a-dd61655300bf","listingId":"943d2de0-6067-4bfc-a8ef-89f19321370b","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/382","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:27.691Z"}],"sources":[{"listingId":"943d2de0-6067-4bfc-a8ef-89f19321370b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/382","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:27.691Z","lastSeenAt":"2026-04-23T09:31:44.620Z"}],"details":{"listingId":"943d2de0-6067-4bfc-a8ef-89f19321370b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/382 \\\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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/382"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/382"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or transaction information via a single paid API call","Integrating pay-per-use API access into agent workflows without API key management","Programmatic access to platform services settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.821Z"},"updatedAt":"2026-04-23T09:31:44.620Z"}}