{"id":"ec119058-04db-42ec-82bc-76b5c2a5c8a9","shortId":"jSWpkR","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/transactions/83` accepts POST requests and returns application/json responses. Payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The max amount required is 20000 base units, which equals $0.02 (USDC uses 6 decimals). The payment timeout is 300 seconds.\n\nNote that while the platform advertises many endpoints across analytics, AI, finance, and utilities, the specific functionality of this particular `/transactions/83` endpoint is not documented beyond the generic label \"Premium API Access.\" No request/response schema details, example payloads, or detailed documentation were found in the crawl. The docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no additional content.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","crypto-paid API","402 payment protocol"],"warnings":["No documentation available for the specific /api/v1/transactions/83 endpoint beyond the label 'Premium API Access'","All docs/pricing/README pages render only 'Connect wallet' with no useful content","No OpenAPI spec or input/output schema provided","The actual functionality of this endpoint is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/83","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/83","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this specific endpoint actually does, no request/response schema, and no examples. The platform's 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":"2026-04-19T13:47:36.757Z","embedding":[-0.021774292,-0.036743164,0.045166016,0.023803711,0.00655365,-0.046203613,-0.026321411,0.045928955,0.06286621,-0.06744385,0.013023376,-0.025222778,-0.037963867,-0.049346924,-0.038604736,0.0019483566,-0.004322052,-0.005470276,-0.04434204,0.035064697,0.031097412,-0.017578125,-0.015029907,0.02456665,-0.00069761276,-0.014678955,-0.010223389,-0.016082764,-0.025665283,-0.05569458,0.050750732,-0.019638062,-0.00029730797,0.018722534,-0.025466919,-0.010375977,-0.010879517,0.038635254,0.032104492,-0.025390625,0.007522583,-0.056396484,-0.01537323,-0.0070495605,-0.055267334,0.015716553,-0.008743286,-0.031585693,-0.002281189,0.017456055,-0.034484863,-0.01386261,-0.015289307,0.0022697449,0.012428284,0.00010281801,0.019332886,0.000854969,0.012542725,0.00061941147,-0.016952515,-0.07562256,-0.0062332153,-0.01574707,-0.012611389,0.051452637,-0.016448975,0.037597656,0.016036987,0.043640137,0.042236328,0.049041748,0.025543213,0.019897461,-0.011703491,0.004020691,0.0054092407,0.06933594,-0.01828003,-0.018585205,-0.00484848,-0.0063934326,-0.047180176,0.0021438599,-0.0023956299,-0.033050537,-0.009086609,0.0015983582,-0.027252197,0.021514893,-0.064941406,-0.012771606,-0.0076828003,0.010719299,0.006641388,-0.016479492,-0.023010254,0.0069618225,-0.026977539,0.023834229,0.019744873,-0.04269409,0.02279663,0.016189575,0.037872314,0.04611206,0.018005371,0.040863037,0.003528595,0.001156807,-0.022216797,0.029220581,-0.0013656616,-0.008163452,0.017242432,0.014518738,-0.015144348,0.016143799,-0.02142334,0.025177002,-0.047607422,0.039642334,0.013755798,-0.015625,0.0018987656,-0.043029785,-0.015075684,0.019195557,-0.03479004,0.0068092346,0.011665344,0.009155273,0.033081055,-0.017807007,-0.016983032,0.011268616,-0.014511108,-0.009025574,-0.044433594,-0.041656494,0.04534912,-0.031051636,0.024765015,0.029464722,-0.11004639,-0.0127334595,-0.048095703,0.006629944,-0.031555176,-0.002817154,-0.0025844574,0.010444641,-0.028427124,-0.009613037,-0.01713562,-0.019592285,0.006603241,0.050842285,-0.03201294,0.047302246,-0.014518738,0.029541016,-0.0040283203,0.014778137,0.02293396,0.0284729,-0.00390625,-0.07446289,-0.079833984,-0.011001587,0.010505676,-0.03387451,-0.038360596,0.016723633,-0.022735596,-0.08123779,-0.044158936,-0.018707275,0.003232956,-0.02394104,0.005584717,-0.038726807,0.019561768,-0.024536133,-0.06707764,-0.027435303,-0.042907715,0.08062744,0.020706177,0.008102417,0.027511597,-0.011306763,0.038726807,0.03564453,-0.0046310425,-0.032043457,0.0047798157,-0.023361206,0.015472412,-0.007209778,-0.0022563934,-0.041259766,0.01878357,0.0869751,-0.010696411,-0.015899658,-0.008079529,-0.033416748,-0.01586914,-0.036224365,0.02168274,0.0051078796,-0.011383057,0.030258179,-0.015075684,-0.034820557,-0.01360321,0.028045654,0.009841919,0.050842285,-0.0008625984,-0.021209717,0.004711151,0.019515991,-0.02482605,0.050720215,0.043914795,0.01423645,-0.03451538,-0.036743164,0.016494751,0.03591919,-0.031951904,0.020401001,-0.0023097992,0.03640747,-0.0037574768,0.017990112,0.027801514,-0.014083862,-0.019882202,-0.03225708,-0.017913818,0.028152466,0.007827759,-0.02330017,-0.02909851,-0.07324219,0.046539307,0.05987549,0.03778076,-0.011291504,-0.0022144318,-0.02671814,0.000746727,-0.07342529,0.06781006,0.07196045,-0.00945282,0.0014333725,0.026184082,-0.009727478,-0.030288696,-0.006629944,-0.025039673,-0.029586792,-0.010925293,-0.009216309,-0.051239014,0.0029087067,0.014877319,0.023269653,0.05670166,0.00762558,-0.038726807,-0.018569946,-0.0014505386,0.0044059753,-0.029418945,-0.014678955,-0.0056610107,0.0038757324,0.020126343,-0.0037193298,0.02381897,-0.0017671585,0.00793457,0.0030078888,0.0048713684,-0.019638062,-0.04309082,0.014183044,-0.012084961,-0.06677246,0.015388489,-0.007129669,0.06311035,-0.031051636,0.038024902,-0.03262329,-0.007019043,0.066101074,-0.024658203,-0.045074463,0.0020065308,0.031341553,0.00844574,0.019317627,0.010070801,-0.04159546,0.00034594536,0.08459473,0.005367279,-0.008720398,0.00014865398,0.012962341,0.027954102,-0.0072898865,-0.05267334,-0.02015686,-0.0018224716,-0.040618896,0.014953613,-0.016937256,0.040985107,-0.015342712,-0.011375427,-0.03286743,-0.013824463,-0.022613525,0.031341553,-0.02204895,0.0032672882,-0.035888672,-0.017425537,0.04147339,0.012168884,-0.021255493,-0.01537323,0.04260254,0.023406982,-0.014671326,-0.035186768,-0.017227173,-0.015525818,0.022232056,0.013366699,0.02330017,0.028961182,0.04586792,-0.038238525,0.010871887,0.02658081,0.003314972,0.042175293,-0.011138916,0.014076233,-0.06781006,-0.046936035,-0.013755798,-0.034942627,0.025177002,0.014350891,-0.003955841,0.062286377,0.018341064,-0.037902832,-0.04031372,0.021560669,-0.05480957,0.005508423,0.047912598,0.0119018555,-0.008621216,-0.0046958923,-0.0012483597,0.0014257431,0.042388916,0.0262146,0.0236969,0.06542969,0.05090332,0.0053482056,0.042114258,-0.017318726,0.033081055,0.010353088,-0.018066406,-0.021316528,-0.016815186,0.019897461,-0.012298584,-0.010597229,-0.04901123,0.033843994,0.042633057,0.08111572,0.017456055,-0.0064849854,0.0151901245,0.001455307,0.01171875,-0.0143966675,-0.012054443,-0.016647339,-0.034088135,0.006652832,0.00010085106,-0.011566162,-0.013092041,0.017700195,-0.0026988983,0.018814087,-0.029144287,0.044708252,-0.015365601,-0.022476196,0.02381897,0.012428284,0.022567749,0.05831909,-0.01676941,0.030853271,0.024047852,-0.05633545,0.0036582947,0.05545044,-0.007926941,-0.022659302,-0.020187378,-0.016799927,0.010620117,-0.009017944,-0.039245605,0.009407043,0.0026779175,0.032073975,0.027435303,-0.024261475,-0.027359009,-0.01776123,-0.010673523,-0.03692627,-0.009681702,-0.027435303,0.0051727295,0.054718018,-0.021469116,-0.009147644,0.016357422,-0.006465912,-0.00315094,-0.009384155,0.010520935,-0.010223389,-0.033721924,0.035888672,-0.0012140274,0.018432617,0.012832642,0.023040771,0.0030288696,0.029663086,0.058776855,0.0018863678,-0.018234253,-0.057037354,0.012969971,-0.042541504,-0.0045700073,0.022415161,-0.021469116,-0.015548706,-0.0032730103,-0.004055023,-0.03729248,0.014915466,-0.020507812,0.0052375793,0.01777649,-0.038604736,-0.022720337,-0.06591797,-0.012176514,0.009338379,0.072021484,0.030334473,-0.019302368,-0.08746338,0.0035152435,0.03387451,0.01474762,0.017105103,-0.012832642,-0.02810669,-0.008811951,-0.039398193,-0.012001038,-0.0090408325,0.011009216,0.006324768,0.006465912,0.031433105,-0.01386261,-0.0008945465,0.002231598,-0.0008325577,0.027374268,-0.016967773,-0.017440796,0.003490448,0.02053833,0.013290405,-0.027038574,-0.039642334,0.033843994,0.003643036,0.03262329,-0.03933716,-0.0060806274,-0.0045776367,0.013717651,0.017501831,-0.025421143,-0.017364502,-0.01586914,-0.047546387,-0.066101074,0.05307007,-0.015014648,0.033691406,0.0110321045,0.011665344,0.011566162,0.0067100525,-0.0042304993,0.01890564,-0.032226562,-0.022872925,-0.023712158,-0.025299072,-0.012512207,-0.009407043,-0.016189575,0.0135650635,-0.016448975,0.015213013,0.018203735,-0.02633667,0.015655518,-0.006046295,0.015914917,0.017852783,0.017456055,0.020843506,0.038238525,0.011642456,-0.02708435,0.024398804,-0.002149582,0.005115509,-0.0056762695,0.036010742,0.016296387,-0.0135650635,0.0085372925,-0.006023407,-0.014480591,-0.029785156,-0.010345459,-0.0051879883,0.012031555,-0.0025234222,-0.026779175,0.025970459,0.011024475,-0.037963867,-0.02357483,0.019866943,0.00097322464,-0.045166016,0.031921387,0.044433594,0.056488037,-0.015052795,0.019073486,-0.00007253885,0.045928955,0.033172607,0.006881714,-0.03250122,0.026245117,-0.01737976,0.03390503,0.0056991577,-0.0013475418,-0.0059776306,0.01737976,0.028366089,0.0368042,0.017044067,-0.022354126,-0.040527344,0.0033473969,-0.0035381317,-0.012771606,0.00818634,0.016784668,0.036071777,-0.011405945,0.02180481,0.02017212,-0.015602112,-0.018173218,-0.008384705,0.033172607,-0.02420044,-0.015304565,0.016723633,0.003917694,0.029510498,-0.050933838,0.0011558533,0.0024662018,0.017730713,-0.018417358,-0.040771484,-0.036865234,0.012565613,0.014831543,0.0024776459,0.02835083,0.025497437,-0.0044288635,-0.008659363,0.03149414,0.0031871796,-0.00881958,-0.016983032,-0.061401367,-0.018508911,0.007724762,0.008911133,-0.019500732,0.012565613,-0.0055236816,-0.007949829,-0.00063848495,-0.02154541,-0.0024337769,-0.033172607,-0.0034294128,0.035339355,0.005317688,0.009399414,-0.014511108,-0.030334473,0.0011768341,0.016479492,0.029067993,-0.03765869,0.03842163,-0.007896423,0.000011920929,-0.0031166077,0.016616821,0.026290894,0.026367188,0.015731812,0.04385376,-0.028045654,0.04309082,-0.027374268,0.01927185,0.0035877228,-0.031463623,-0.0039253235,-0.025665283,-0.010787964,0.04309082,-0.020095825,-0.016845703,-0.031799316,-0.026382446,0.007217407,-0.03955078,0.011512756,0.028442383,0.036346436,-0.025665283,0.022705078,-0.013183594,0.009056091,-0.013519287,-0.0017004013,-0.015731812,-0.00020849705,0.021865845,-0.010467529,-0.016281128,-0.02772522,-0.02180481,-0.01751709,-0.055358887,-0.03552246,-0.0035743713,0.0041999817,-0.014160156,-0.011734009,-0.03741455,-0.018051147,-0.00065660477,-0.0496521,0.020828247,-0.011711121,0.013900757,-0.0015220642,-0.008201599,-0.007129669,0.004825592,0.004486084,0.03552246,0.013404846,0.006072998,-0.04458618,0.019515991,0.011306763,0.035217285,0.0039367676,-0.020050049,-0.017059326,-0.019073486,-0.04888916,-0.0069770813,-0.012489319,0.0017147064,-0.014877319,-0.005264282,-0.04171753,0.012710571,-0.027908325,-0.0002206564,0.014472961,-0.004108429,0.026062012,-0.004135132,0.016143799,-0.017486572,-0.025543213,-0.031982422,0.011192322,0.008872986,0.0024700165,0.006336212,0.058624268,0.00085783005,-0.00806427,-0.00031924248,-0.007575989,0.0016260147,-0.03741455,0.00061893463,-0.010238647,0.009712219,-0.030181885,-0.001461029,-0.040161133,-0.0050468445,0.087890625,0.0063285828,-0.023406982,-0.010902405,-0.0016479492,0.012466431,0.027374268,-0.039245605,-0.003868103,-0.025466919,0.019363403,-0.020935059,0.017196655,-0.0023784637,0.022155762,-0.025543213,-0.053527832,-0.009468079,-0.0001167655,-0.008621216,-0.047790527,-0.013389587,-0.062438965,0.008392334,-0.0040512085,-0.0093307495,0.020507812,0.008087158,0.008872986,-0.08782959,-0.004627228,0.04043579,0.015899658,0.031463623,-0.018814087,0.020309448,0.028549194,-0.029953003,-0.013465881,0.019699097,-0.042663574,-0.010040283,-0.026443481,0.021743774,-0.007972717,-0.018218994,0.015586853,0.003850937,0.023529053,0.0027179718,0.000017225742,-0.017715454,0.0056037903,-0.011711121,0.028915405,-0.017715454,-0.009185791,0.041381836,-0.042175293,0.027053833,0.020935059,0.0013666153,-0.0040130615,0.042297363,0.037841797,-0.031829834,0.008407593,0.025100708,0.009567261,0.041503906,-0.021331787,0.040527344,0.022888184,-0.018676758,0.02935791,-0.021224976,-0.012077332,-0.026916504,-0.027328491,0.037261963,-0.000051558018,0.013824463,-0.022354126,0.00907135,0.008705139,0.006198883,0.01423645,-0.012710571,-0.032989502,-0.026046753,0.005039215,0.009086609,-0.009002686,0.0036888123,0.02357483,-0.002866745,0.03781128,0.014320374,-0.02168274,0.018127441,0.033843994,-0.015411377,0.0015182495,0.025222778,-0.020431519,-0.0007185936,0.024612427,0.017166138,-0.05807495,-0.013465881,-0.007965088,-0.006175995,-0.0062332153,-0.0011329651,-0.026168823,-0.0011587143,0.0024757385,0.0014047623,-0.039794922,0.009567261,-0.0047416687,-0.037139893,-0.0033512115,-0.009124756,0.021530151,0.011894226,0.0075645447,0.022445679,-0.01612854,0.039794922,0.015151978,-0.022140503,0.040985107,0.02671814,0.0064735413,-0.026519775,-0.018554688,-0.017181396,0.0010280609,-0.0019083023,-0.03201294,0.024337769,0.018829346,-0.009498596,0.0072250366,-0.0042037964,0.015151978,-0.01234436,0.017959595,-0.010818481,0.015823364,-0.030410767,0.031982422,-0.04748535,0.02079773,0.015213013,0.0060653687,-0.015563965,-0.009284973,-0.038360596,0.027038574,0.0054626465,-0.025054932,0.033081055,-0.0075950623,0.027252197,-0.018463135,-0.0031986237,0.005897522,-0.033355713,-0.024749756,0.024002075,-0.011360168,-0.0011940002,0.019546509,-0.039123535,0.03289795,-0.02293396,0.014160156,-0.004699707,0.0028362274,-0.028717041,-0.014877319,-0.018463135,-0.020874023,-0.023849487,-0.007896423,-0.0005326271,0.041778564,0.019927979,0.018920898,0.049316406,0.007575989,0.0107421875,-0.030090332,-0.04147339,0.025146484,-0.014274597,0.017959595,-0.013999939,0.044952393,0.051635742,-0.010520935,0.02772522,0.019699097,0.04244995,0.0067634583,0.0049972534,-0.028076172,0.007663727,-0.023376465,0.027053833,0.012054443,0.04336548,-0.013687134,0.011909485,0.022842407,0.015213013,-0.028305054,0.031982422,0.07867432,0.0121154785,0.0015583038,0.031143188,0.004043579,-0.011627197,-0.013458252,-0.022705078,0.04925537,0.0076026917,0.053619385,0.03704834,0.012565613,0.002773285,0.04434204,-0.027114868,-0.019561768,0.054473877,0.016174316,-0.008331299,-0.009513855,-0.029220581,0.0024662018,-0.047332764,-0.030380249,0.0019254684,-0.017807007,0.015731812,0.00048041344,0.010551453,-0.0045051575,0.031143188,0.029907227,0.022964478,-0.0055160522,0.030685425,0.044189453,0.0006427765,0.017578125,-0.014808655,0.016738892,-0.016662598,-0.019592285,0.026245117,0.02911377,-0.0071907043,-0.00025129318,0.025619507,0.004245758,0.03967285,0.047088623,-0.027236938,0.011238098,0.0340271,0.002840042,-0.010246277,0.03741455,0.045837402,0.013900757,0.031311035,0.039886475,0.03793335,-0.031585693,0.018585205,-0.013328552,-0.008872986,-0.0143585205,-0.00026273727,0.0010824203,-0.012550354,0.027633667,0.0107803345,-0.01828003,0.016662598,0.020751953,0.00030255318,-0.011856079,-0.017181396,0.009918213,-0.019424438,0.0041122437,0.023529053,-0.023345947,0.024795532,0.004814148,0.009963989,-0.032714844,0.028549194,-0.011695862,-0.009162903,-0.009941101,0.02027893,-0.038909912,0.0070381165,-0.015586853,0.012962341,-0.052093506,0.009437561,0.026245117,-0.016189575,0.01637268,0.0054397583,-0.010375977,-0.006214142,0.017959595,0.0085372925,-0.01852417,-0.011566162,-0.024276733,0.04269409,0.042541504,0.025161743,0.014450073,0.0017175674,-0.011695862,-0.001698494,-0.0049324036,-0.00010406971,-0.00881958,-0.009170532,-0.021972656,0.01259613,0.035369873,0.019454956,0.042541504,0.0090789795,-0.014709473,0.002380371,0.029663086,0.010375977,-0.009010315,-0.0052719116,0.020080566,-0.014297485,0.049072266,0.051452637,0.009132385,0.039520264,-0.012283325,-0.02027893,0.0046081543,-0.015960693,0.023406982,-0.0039482117,0.0071792603,-0.014770508,0.027679443,-0.016983032,-0.040740967,0.008934021,-0.024108887,-0.014274597,-0.023544312,-0.0012273788,0.011520386,0.023239136,0.035491943,0.0057678223,-0.02130127,0.05718994,-0.013626099,0.04107666,0.0003902912,0.0012702942,0.052093506,0.0284729,0.048187256,0.0063934326,0.012260437,-0.032104492,0.013465881,0.038116455,0.013320923,0.019866943,0.0039978027,-0.008659363,0.04019165,-0.0017127991,0.034332275,-0.011146545,-0.0035953522,0.008102417,0.0017871857,0.0045051575,-0.0019016266,-0.0069084167,0.013542175,0.0395813,-0.031463623,-0.0031166077,-0.027923584,-0.0035305023,0.027633667,-0.0056610107,-0.00020384789,-0.0105896,-0.025726318,0.023010254,-0.019104004,-0.010475159,0.003917694,0.022338867,-0.035186768,-0.017974854,0.008918762,0.023544312,-0.016784668,0.017837524,0.017242432,0.002204895,0.015388489,0.041107178,-0.014709473,0.044677734,-0.004940033,0.025650024,0.026046753,0.018478394,-0.014297485,0.011306763,-0.0012950897,-0.02178955,0.013069153,0.037261963,-0.025924683,0.0030651093,-0.0041770935,-0.016799927,0.0134887695,0.007850647,-0.001326561,0.018051147,-0.005306244,-0.020950317,0.0015144348,0.005302429,-0.00025057793,0.0011043549,0.007041931,-0.014373779,0.02420044,0.041046143,0.024597168,-0.035583496,-0.0014781952,0.013023376,0.00015842915,-0.0077705383,-0.018463135,-0.013389587,-0.030380249,0.007347107,-0.00013411045,-0.005832672,0.016418457,-0.027130127,-0.013328552,0.012245178,0.007785797,0.011924744,0.009284973,0.0026855469,0.034240723,-0.00541687,-0.008666992,-0.012397766,-0.004299164,0.017913818,0.010322571,-0.011268616,-0.01486969,0.027755737,-0.005783081,0.021270752,0.016098022,-0.0051002502,0.008644104,-0.012931824,-0.01600647,0.011077881,0.017837524,0.00020611286,-0.008216858,-0.01739502,-0.0011453629,0.051574707,-0.0025959015,0.0023231506,0.02432251,0.014297485,0.011207581,0.029693604,0.02923584,0.034240723,0.036376953,-0.013320923,-0.0069503784,0.0036449432,-0.010314941,-0.04031372,0.019805908,0.000026643276,-0.02279663,0.040130615,0.02720642,0.004989624,-0.022598267,-0.0053215027,0.0038719177,-0.02645874,0.0074768066,-0.02520752,0.008659363,-0.018630981,-0.018966675,0.0076942444,-0.030975342,-0.04248047,-0.024108887,-0.005508423,-0.0078125,-0.040527344,0.0025939941,-0.023513794,0.010246277,-0.026138306,-0.004753113,0.0011940002,0.021728516,-0.01235199,-0.02760315,-0.0056533813,0.04046631,0.009292603,0.0289917,0.028839111,-0.011878967,-0.04446411,-0.034057617,-0.005092621,-0.011253357,0.024963379,-0.0033302307,0.029022217,0.019561768,-0.02128601,-0.0022964478,-0.00074386597,0.0043029785,-0.015464783,-0.013702393,-0.008659363,0.003604889,0.026779175,-0.0029029846,-0.0054893494,0.035980225,-0.024368286,-0.013755798,0.036071777,0.040130615,0.011650085,0.043670654,-0.01689148,-0.0019264221,-0.005092621,-0.0011577606,-0.0103302,0.002204895,0.005340576,0.006893158,-0.0015983582,0.0015830994,0.029693604,-0.0074272156,-0.0027675629,0.024139404,-0.000094115734,-0.007205963,0.03439331,0.010444641,0.005405426,-0.023239136,-0.014511108,0.033081055,0.023040771,0.027877808,0.0040359497,-0.01499176,0.0037326813,-0.027511597,0.015930176,0.021087646,-0.007507324,-0.046661377,-0.02545166,-0.023010254,0.019760132,-0.0029582977,0.014892578,-0.006603241,0.009689331,-0.030548096,-0.017944336,-0.02911377,0.04272461,0.01398468,-0.020187378,-0.014434814,-0.0011291504,0.03540039,-0.031280518,0.005596161,-0.04333496,-0.021194458,0.0035305023,-0.011634827,0.018722534,0.011177063,0.0069503784,-0.0029335022,-0.017242432,-0.0038471222,0.0056648254,0.025741577,-0.029266357,-0.0044822693,0.031402588,0.014160156,-0.014877319,0.021850586,-0.004081726,-0.0068893433,0.0014533997,-0.01637268,0.012687683,-0.01902771,0.04788208,0.0038108826,-0.00015795231,0.038360596,-0.006980896,0.010879517,-0.016677856,0.014373779,0.016174316,0.0024032593,0.0491333,-0.020553589,-0.018295288,0.009025574,-0.023712158,-0.034423828,0.016326904,0.013763428,0.019134521,-0.0013389587,0.058135986,-0.008728027,-0.022384644,0.021942139,0.0131073,-0.02609253,-0.020751953,0.030578613,-0.0035743713,-0.003955841,0.0047721863,-0.01184845,-0.03555298,-0.010231018,0.009613037,-0.004047394,-0.004634857,0.0262146,0.023468018,0.040252686,0.0032081604,0.02407837,0.023208618,0.009284973,0.021057129,-0.00013709068,0.052734375,-0.009933472,-0.03277588,0.010231018,-0.011444092,-0.023895264,0.0062332153,-0.012062073,0.0057640076,-0.03817749,0.011421204,0.0060539246,0.033447266,-0.016433716,0.010925293,-0.0236969,-0.02458191,-0.027770996,-0.014312744,-0.029541016,0.0077819824,0.041015625,0.009994507,0.02482605,0.00541687,-0.030227661,0.008918762,0.04852295,0.0030975342,-0.02633667,-0.022644043,0.013938904,0.016342163,-0.0012893677,0.0031909943,-0.0074157715,-0.016647339,0.00422287,-0.0006837845,0.01398468,-0.00019061565,-0.0046577454,0.00046491623,-0.0005078316,-0.016647339,0.046691895,-0.005596161,-0.010192871,0.0018587112,-0.0019407272,0.024124146,0.027954102,-0.016189575,0.030944824,0.018753052,-0.044952393,0.0637207,0.0002641678,0.028518677,-0.0138549805,0.006832123,-0.029464722,-0.021072388,-0.004360199,0.0034809113],"createdAt":"2026-04-18T19:27:08.828Z","updatedAt":"2026-04-22T07:01:39.280Z","lastSeenAt":"2026-04-22T07:01:39.280Z","tsv":"'/api/v1/transactions/83':103 '/request':16,34 '/transactions/83':167 '0.02':15,33,79,136 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':119 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':123 '20000':131 '300':145 '402 payment protocol' '6':139 'Base network API' 'USDC micropayment endpoint' 'accept':104 'access':7,25,44,178 'across':155 'addit':209 'address':118 'advertis':152 'ai':66,157 'amount':128 'analyt':65,156 'api':6,24,43,91,177,195 'application/json':109 'base':9,27,87,125,132 'beyond':172 'call':4,22 'categori':62 'chain':116 'commit':98 'connect':204 'content':210 'contract':122 'crawl':192 'crypto-paid API' 'data':64 'decim':140 'detail':182,186 'doc':194 'document':171,187 'endpoint':38,55,75,102,154,168 'equal':135 'exampl':183 'financ':69,158 'found':189 'function':163 'generic':174 'includ':63 'infrastructur':72 'json-response' 'key':92 'label':175 'learn':68 'limit':95 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':67 'mani':54,153 'max':127 'network':10,28,88 'no-api-key' 'note':147 'offer':56 'on-chain':114 'one':52 'page':199 'particular':166 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payabl':82 'payload':184 'payment':48,111,142 'per':3,21,80 'platform':59,151 'post':105 'post-method' 'premium':5,23,42,176 'price':77,196 'prompt':206 'protocol':13,31,49 'provid':41 'rate':94 'readm':198 'render':201 'request':81,106 'request/response':180 'requir':99,129 'respons':110 'return':108 'schema':181 'second':146 'settl':113 'span':61 'specif':101,162 'timeout':143 'unit':133 'usdc':18,36,84,121,137 'usdc-base-network' 'use':120,138 'util':73,160 'via':11,29,45 'wallet':205 'web3':70 'x402':12,30,47 'x402 API' 'x402-payment'","prices":[{"id":"28a0fbd0-7155-4ac9-abdb-c4fb7d805dbf","listingId":"ec119058-04db-42ec-82bc-76b5c2a5c8a9","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/83","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:08.828Z"}],"sources":[{"listingId":"ec119058-04db-42ec-82bc-76b5c2a5c8a9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/83","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:08.828Z","lastSeenAt":"2026-04-22T07:01:39.280Z"}],"details":{"listingId":"ec119058-04db-42ec-82bc-76b5c2a5c8a9","quickStartSnippet":"# 1. Send POST to the endpoint; receive 402 challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/transactions/83\n# 2. Parse the 402 response, construct X-PAYMENT header with USDC payment proof on Base\n# 3. Resend request with valid X-PAYMENT header to access the resource","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 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/83"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/83"}],"useCases":["Accessing premium API data without subscription or API key management","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-use endpoints into autonomous agent workflows"],"bestFor":["Developers wanting zero-commitment pay-per-call API access","Agents that can settle x402 payments on Base network","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring free or subscription-based access","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:35.91Z"},"updatedAt":"2026-04-22T07:01:39.280Z"}}