{"id":"941ac89f-fe50-4c16-9263-8af5eedc42a9","shortId":"HmvnLM","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/351` is listed under the site's premium access tier. It accepts POST requests and requires an X-PAYMENT header containing a valid x402 payment proof. The maximum amount required is 20,000 base units of USDC (0.02 USD given 6 decimals), paid to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base. No API keys or rate limits are advertised; access is gated purely by payment.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. The exact functionality of the `/api/v1/transactions/351` endpoint is unclear beyond its generic \"Premium API Access\" label. The site's landing page lists many endpoint categories but does not include this specific path, so its purpose cannot be confirmed from available material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-method","no-api-key"],"categories":["api-gateway","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access"],"warnings":["No documentation available — docs/pricing/README pages only show 'Connect wallet'","The exact functionality of /api/v1/transactions/351 is undocumented and unclear","No response schema or example responses provided","Cannot verify what data or service is actually returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/351","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/351","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns 402 challenge correctly) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no response schema, no example payloads, and the specific purpose of /api/v1/transactions/351 is unknown. 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":"2026-04-19T13:24:03.286Z","embedding":[-0.02218628,-0.032440186,0.04473877,0.018737793,0.011688232,-0.028717041,-0.037841797,0.05038452,0.06530762,-0.076416016,0.019332886,-0.03881836,-0.027359009,-0.051086426,-0.03656006,0.008361816,-0.0075531006,0.0087509155,-0.04812622,0.035369873,0.036102295,-0.028015137,-0.020202637,0.025497437,-0.0048294067,-0.015365601,-0.014793396,-0.00869751,-0.010925293,-0.04119873,0.03781128,-0.023788452,-0.0052261353,0.02230835,-0.036102295,-0.024932861,-0.004108429,0.038085938,0.044769287,-0.007358551,0.005542755,-0.04928589,-0.008132935,-0.0052337646,-0.049591064,0.019378662,0.007507324,-0.024002075,-0.006290436,0.015045166,-0.0340271,-0.02355957,-0.016830444,0.005760193,0.012619019,0.006149292,-0.0020580292,-0.019699097,0.009475708,0.009681702,-0.005130768,-0.06524658,-0.015068054,-0.017288208,-0.009422302,0.056640625,-0.010597229,0.056640625,0.019577026,0.053375244,0.047912598,0.046173096,0.028121948,0.025436401,0.0017795563,0.0010690689,0.002538681,0.079833984,-0.020050049,-0.016647339,-0.00762558,-0.0095825195,-0.04699707,0.011756897,-0.01940918,-0.044311523,-0.014442444,0.012756348,-0.027023315,0.020599365,-0.07867432,0.00074338913,-0.0072021484,0.008178711,-0.0007224083,-0.0066986084,-0.024612427,0.018844604,-0.02923584,0.012802124,0.015991211,-0.038024902,0.03213501,0.010314941,0.044891357,0.032196045,0.025756836,0.035858154,0.0013513565,-0.008293152,-0.026901245,0.017700195,0.0013828278,-0.004261017,0.017807007,0.017410278,-0.021453857,0.012298584,-0.018234253,0.024017334,-0.0552063,0.05154419,0.024841309,-0.012077332,0.014602661,-0.05328369,-0.0067367554,0.012901306,-0.026977539,-0.0032672882,0.027755737,0.015533447,0.03845215,-0.027023315,-0.022918701,0.006877899,-0.010757446,-0.0127334595,-0.050750732,-0.031677246,0.03112793,-0.03744507,0.016998291,0.031021118,-0.109680176,-0.016601562,-0.049224854,0.013046265,-0.027252197,-0.008010864,-0.0075798035,0.018814087,-0.022583008,-0.016799927,-0.029205322,-0.014717102,0.007911682,0.035125732,-0.024032593,0.04626465,-0.013885498,0.024276733,0.01626587,0.01789856,0.030517578,0.027175903,0.001581192,-0.06677246,-0.083496094,-0.013381958,-0.0018396378,-0.018218994,-0.049591064,0.014549255,-0.010101318,-0.06591797,-0.038146973,-0.017074585,-0.0060424805,-0.032104492,-0.004562378,-0.025939941,0.019927979,-0.007118225,-0.07269287,-0.029647827,-0.03604126,0.07775879,0.016937256,0.0011949539,0.037719727,-0.00869751,0.05819702,0.03781128,-0.022857666,-0.029129028,0.011245728,-0.011787415,0.018157959,0.0029315948,-0.0015563965,-0.0473938,0.018371582,0.089416504,0.011268616,-0.018569946,0.007331848,-0.049194336,-0.042144775,-0.039764404,0.00818634,0.006828308,-0.0035114288,0.035827637,-0.019012451,-0.03186035,-0.0022335052,0.007598877,0.021499634,0.066467285,0.0047950745,-0.019958496,0.021652222,0.012336731,-0.036468506,0.04550171,0.043029785,0.017044067,-0.04248047,-0.03829956,0.013969421,0.03149414,-0.026794434,0.021194458,-0.012161255,0.038269043,-0.0087890625,0.017807007,0.03274536,-0.03277588,-0.022445679,-0.017303467,-0.015457153,0.027618408,0.009590149,-0.029724121,-0.042785645,-0.073913574,0.043426514,0.055603027,0.046966553,-0.009567261,-0.0034103394,-0.025131226,-0.00283432,-0.076416016,0.044158936,0.07330322,-0.020339966,-0.0060272217,0.017303467,-0.00843811,-0.04284668,-0.009422302,-0.013015747,-0.031402588,-0.008018494,0.008003235,-0.043823242,0.0074043274,0.00749588,0.024856567,0.053588867,-0.0061073303,-0.04586792,-0.022262573,0.00006788969,0.008636475,-0.04058838,-0.0064048767,-0.0059318542,0.006134033,0.030029297,-0.00039458275,0.023986816,-0.00046229362,0.014511108,-0.00881958,-0.0010118484,-0.0143966675,-0.03552246,0.012329102,-0.00541687,-0.056121826,0.016586304,0.00023043156,0.068847656,-0.049865723,0.040374756,-0.018661499,0.0027446747,0.055725098,-0.012290955,-0.04611206,0.01600647,0.023834229,0.01713562,0.037353516,0.0066108704,-0.03338623,-0.009300232,0.07720947,-0.017913818,-0.0075531006,0.003080368,0.015914917,0.03866577,-0.006011963,-0.061767578,-0.02746582,-0.014305115,-0.037078857,0.010353088,-0.022155762,0.021347046,-0.0060806274,-0.014976501,-0.029174805,-0.0028629303,-0.026657104,0.017532349,-0.027236938,-0.0023841858,-0.031021118,-0.021499634,0.029388428,0.02255249,-0.012702942,-0.004497528,0.05795288,0.022888184,-0.00730896,-0.0357666,-0.01828003,-0.019042969,0.013473511,0.020874023,0.018173218,0.017807007,0.050476074,-0.040161133,0.014793396,0.025009155,0.014701843,0.025405884,-0.007068634,0.0118255615,-0.071899414,-0.05923462,-0.023849487,-0.041290283,0.034088135,0.010719299,-0.005847931,0.051086426,0.0038833618,-0.028549194,-0.024887085,0.012512207,-0.04043579,0.0008792877,0.048858643,0.0049934387,-0.029693604,-0.0014257431,0.0004887581,0.008010864,0.027877808,0.010879517,0.020202637,0.06750488,0.049346924,0.001876831,0.03149414,-0.00022816658,0.016571045,0.003332138,-0.027053833,-0.032806396,-0.01651001,0.015670776,-0.015342712,-0.013587952,-0.06298828,0.049560547,0.04159546,0.08294678,0.018234253,0.004634857,0.03137207,-0.003004074,0.01979065,-0.016311646,-0.027389526,-0.020477295,-0.047424316,0.012741089,-0.0077552795,-0.011352539,-0.018417358,0.014846802,0.0046653748,0.020568848,-0.032165527,0.062561035,0.002506256,-0.009994507,0.033081055,0.002336502,0.03253174,0.048065186,-0.028717041,0.03314209,0.030181885,-0.049591064,0.0007991791,0.039886475,-0.009689331,-0.008163452,-0.038330078,-0.019577026,0.0012311935,-0.0052452087,-0.043701172,0.0022449493,0.011428833,0.029510498,0.030548096,-0.021743774,-0.030548096,0.000039041042,-0.014625549,-0.04486084,-0.013496399,-0.020980835,0.010070801,0.056488037,-0.03125,-0.0012140274,0.0030117035,0.0015716553,0.021759033,-0.000300169,0.0066719055,-0.010002136,-0.032440186,0.00737381,0.013290405,0.016174316,0.0054779053,0.022872925,0.016296387,0.029846191,0.048461914,0.005519867,-0.015838623,-0.050567627,0.009117126,-0.055023193,-0.011817932,0.02116394,-0.031173706,-0.012245178,-0.020111084,-0.006000519,-0.026824951,-0.008888245,-0.020370483,0.004219055,0.01864624,-0.03326416,-0.03567505,-0.06072998,-0.0033683777,-0.0032539368,0.072265625,0.035461426,0.0056114197,-0.062438965,-0.008895874,0.026763916,0.012527466,0.012771606,-0.014289856,-0.0026550293,-0.006385803,-0.017486572,-0.015609741,-0.009033203,0.016082764,-0.00045013428,0.00007909536,0.033935547,0.0074882507,0.02142334,0.01234436,0.008842468,0.03778076,-0.015991211,0.0016117096,-0.012252808,0.026306152,-0.0016927719,-0.020385742,-0.045684814,0.04095459,0.010231018,0.0340271,-0.029800415,-0.013305664,-0.0066871643,0.009353638,0.0110321045,-0.02015686,-0.010772705,-0.009399414,-0.057617188,-0.056396484,0.037872314,-0.022628784,0.026428223,0.009796143,0.0021839142,0.016738892,0.0069503784,-0.005355835,0.034606934,-0.032318115,-0.013694763,-0.030319214,-0.032989502,-0.016448975,-0.00001001358,-0.026062012,0.013114929,-0.02545166,0.010635376,0.013496399,-0.027313232,0.03375244,-0.0058937073,0.0024909973,0.026000977,0.008735657,0.015991211,0.03857422,0.0029144287,-0.0287323,0.025115967,0.0015764236,0.020553589,-0.016311646,0.04147339,0.021911621,-0.0062026978,0.0034618378,-0.006439209,-0.016098022,-0.018600464,-0.0042686462,0.01133728,0.018188477,-0.0037250519,-0.027511597,0.02760315,0.0178833,-0.02456665,-0.026657104,0.009284973,-0.00001758337,-0.037200928,0.02772522,0.03488159,0.061523438,-0.0024681091,0.002904892,0.015563965,0.04095459,0.037597656,0.019012451,-0.02444458,0.019607544,-0.010032654,0.020645142,0.005428314,-0.0052452087,0.009162903,0.004863739,0.03164673,0.022872925,0.01928711,-0.014549255,-0.030960083,0.0012044907,-0.005420685,-0.01864624,0.016540527,0.022033691,0.034057617,-0.023529053,0.023880005,0.022003174,-0.019882202,-0.021820068,-0.0018577576,0.027511597,-0.0143585205,-0.011131287,0.008483887,0.0023078918,0.03765869,-0.062194824,0.006263733,0.008140564,0.0075149536,-0.020645142,-0.028549194,-0.040649414,0.008857727,0.031311035,0.009391785,0.018920898,0.03643799,0.0077552795,-0.005844116,0.02708435,-0.007671356,-0.016357422,-0.0084991455,-0.043884277,-0.019744873,0.004306793,0.00066947937,-0.014144897,0.014328003,-0.013839722,-0.016738892,0.015327454,-0.012908936,-0.00085020065,-0.031951904,0.01285553,0.03778076,-0.00088500977,0.009101868,-0.01512146,-0.02293396,0.0030937195,0.022766113,0.017059326,-0.04537964,0.02734375,-0.0038089752,-0.0054016113,-0.00932312,0.013031006,0.023498535,0.02053833,0.008605957,0.033050537,-0.036102295,0.030471802,-0.03225708,0.014137268,0.0022258759,-0.03387451,-0.0063819885,-0.020736694,-0.026229858,0.044830322,-0.018249512,-0.014190674,-0.035583496,-0.023498535,-0.013641357,-0.051696777,0.013168335,0.026901245,0.031402588,-0.02519226,0.010810852,-0.010673523,0.008422852,-0.013374329,0.004486084,-0.019897461,0.012962341,0.0032920837,0.003238678,-0.03086853,-0.01675415,-0.02116394,-0.0028953552,-0.049316406,-0.04244995,-0.018066406,0.011955261,-0.009780884,-0.016143799,-0.041290283,-0.023284912,0.0020618439,-0.043060303,0.015106201,-0.00056791306,0.019897461,0.0056495667,-0.011634827,0.0004963875,0.01979065,0.002248764,0.034240723,0.014083862,0.002811432,-0.045837402,0.0056419373,0.024627686,0.029510498,0.00007802248,-0.011955261,-0.0068588257,-0.014312744,-0.05722046,-0.011451721,-0.018539429,-0.013542175,-0.010543823,0.010368347,-0.04208374,-0.004009247,-0.01890564,-0.0020580292,0.028915405,0.016464233,0.031677246,-0.0042304993,0.015106201,-0.007774353,-0.020568848,-0.035186768,0.021316528,0.010391235,0.0064315796,0.014274597,0.05328369,0.0017375946,-0.007183075,-0.00042271614,-0.00020825863,0.021621704,-0.015106201,0.0034751892,-0.013786316,0.0041236877,-0.020767212,-0.011138916,-0.04623413,-0.0079574585,0.08734131,-0.0038909912,-0.012481689,-0.0155181885,-0.016326904,0.019073486,0.033569336,-0.028381348,0.007255554,-0.018920898,0.019607544,-0.019577026,0.0143585205,0.014015198,0.017044067,-0.024002075,-0.065979004,-0.00630188,-0.004585266,-0.013618469,-0.06542969,-0.017333984,-0.056640625,-0.01033783,0.00061893463,-0.020645142,0.0023612976,0.025024414,-0.004508972,-0.08502197,-0.009140015,0.037994385,0.011581421,0.033233643,-0.02027893,0.021514893,0.028686523,-0.026763916,-0.026351929,0.03665161,-0.0390625,0.0004708767,-0.02494812,0.027770996,-0.016647339,-0.022750854,0.023834229,0.018371582,0.026504517,-0.004219055,0.0032043457,-0.014198303,0.003604889,-0.008583069,0.021240234,-0.014564514,-0.011238098,0.03125,-0.03768921,0.019119263,0.017120361,0.00006908178,-0.0039596558,0.03387451,0.03805542,-0.03491211,-0.0030059814,0.029724121,0.010787964,0.028945923,-0.0256958,0.044036865,0.019012451,-0.014602661,0.025863647,-0.0057640076,-0.014572144,-0.037994385,-0.026062012,0.022491455,-0.011978149,0.011871338,-0.0078125,0.0071258545,0.005004883,0.0020809174,0.014785767,-0.0029563904,-0.035858154,-0.023849487,-0.0005836487,0.010139465,-0.0044555664,0.002040863,0.023651123,0.016983032,0.045135498,0.015602112,-0.014976501,0.012649536,0.023361206,-0.020263672,0.0024089813,0.0317688,-0.015090942,0.011657715,0.02772522,0.012367249,-0.049957275,-0.011222839,-0.015106201,-0.0055999756,0.0022659302,-0.00040650368,-0.028198242,-0.009284973,-0.0014762878,-0.003332138,-0.032592773,0.009681702,-0.018737793,-0.033477783,-0.0077209473,-0.012329102,0.012481689,0.0021209717,0.0047950745,0.026473999,-0.0040664673,0.04119873,0.0022697449,-0.023803711,0.03173828,0.02671814,0.01776123,-0.02760315,-0.011955261,-0.01763916,0.0030574799,0.0014266968,-0.020950317,0.015045166,0.033996582,-0.0021896362,0.0052337646,0.0020561218,0.02923584,-0.01322937,0.015014648,-0.008758545,0.022079468,-0.02897644,0.018600464,-0.040771484,0.012161255,0.017074585,-0.002325058,0.0018043518,-0.0059280396,-0.03567505,0.0234375,0.0033817291,-0.016693115,0.049102783,0.0020542145,0.030578613,-0.033843994,-0.009521484,0.006175995,-0.03729248,-0.025161743,0.023742676,0.0005078316,0.0019741058,0.022521973,-0.048675537,0.036346436,-0.026977539,0.02734375,-0.0032176971,0.014305115,-0.024978638,-0.016357422,-0.019058228,-0.013458252,-0.013580322,0.0008363724,-0.009887695,0.050109863,0.021377563,0.022140503,0.053375244,0.008995056,0.012290955,-0.03945923,-0.032928467,0.014137268,-0.019485474,0.008071899,-0.013473511,0.060577393,0.0491333,-0.0021839142,0.039093018,0.029388428,0.02999878,0.009246826,0.0033016205,-0.018249512,0.014694214,-0.011558533,0.016479492,0.0063705444,0.0463562,-0.014846802,0.020080566,0.016189575,0.02507019,-0.031341553,0.037750244,0.06518555,0.023925781,-0.017608643,0.034088135,0.0060424805,-0.011161804,-0.017745972,-0.026016235,0.06304932,-0.006996155,0.061157227,0.05633545,0.020629883,-0.0011634827,0.03338623,-0.02798462,-0.021072388,0.06817627,0.01914978,-0.027420044,-0.0178833,-0.014831543,0.0078048706,-0.04888916,-0.03543091,0.010429382,-0.0064430237,0.01737976,0.0058937073,-0.0009918213,-0.012145996,0.017242432,0.028167725,0.017120361,-0.0090789795,0.030166626,0.03112793,-0.00069093704,0.01171875,-0.008728027,0.027359009,-0.021011353,-0.0154418945,0.022888184,0.022918701,-0.014923096,0.00013446808,0.017166138,0.00040340424,0.050750732,0.048583984,-0.02142334,0.007827759,0.034973145,0.009483337,-0.006958008,0.05078125,0.03591919,0.008544922,0.04031372,0.0395813,0.021072388,-0.03314209,0.023391724,-0.004512787,-0.001250267,-0.01423645,-0.010856628,0.004043579,-0.011306763,0.019515991,0.0067100525,-0.026916504,0.020507812,0.030395508,0.010276794,-0.0021133423,-0.009613037,0.020477295,-0.023880005,-0.00010842085,0.018249512,-0.010917664,0.033477783,-0.0026607513,0.023620605,-0.027694702,0.03253174,-0.007534027,-0.013114929,-0.010383606,0.027908325,-0.03250122,-0.0005950928,-0.00023710728,-0.0013008118,-0.052093506,0.0076446533,0.028137207,-0.0149383545,0.026367188,0.008285522,-0.0015058517,0.0051727295,0.02746582,0.005584717,-0.0015478134,-0.02520752,-0.027435303,0.04095459,0.04421997,0.006225586,0.01574707,-0.007965088,-0.002664566,0.0039901733,-0.0044898987,-0.006664276,-0.013473511,-0.01902771,-0.025161743,0.01158905,0.03466797,0.019165039,0.041809082,0.0006775856,-0.028320312,0.007003784,0.024490356,0.016326904,-0.004070282,-0.010848999,0.018508911,-0.025604248,0.049713135,0.037261963,0.004753113,0.026168823,-0.01335907,-0.023330688,0.02027893,-0.010543823,0.014785767,-0.012367249,0.0048217773,-0.010292053,0.028060913,-0.018737793,-0.0413208,0.015731812,-0.020187378,-0.020568848,-0.016738892,0.007736206,0.004852295,0.02116394,0.044281006,0.010734558,-0.024337769,0.06842041,-0.022628784,0.037506104,0.0019464493,-0.01197052,0.047088623,0.029174805,0.041992188,0.011405945,0.01876831,-0.037322998,0.019012451,0.04727173,0.019699097,0.011680603,-0.0056114197,-0.024505615,0.02708435,0.0032138824,0.03173828,-0.01626587,-0.0031986237,0.011528015,-0.0068206787,0.004283905,-0.004135132,-0.008415222,0.0030059814,0.049591064,-0.0385437,-0.01499939,-0.020355225,-0.0074043274,0.0284729,-0.01058197,0.0037403107,0.005897522,-0.025222778,0.024658203,-0.028457642,-0.008346558,0.002544403,0.026428223,-0.044555664,-0.018569946,0.002878189,0.010627747,-0.019943237,0.02368164,0.012809753,0.0069885254,0.017211914,0.043121338,-0.010055542,0.041168213,-0.0105896,0.025314331,0.025375366,0.008514404,-0.012702942,0.010360718,0.008613586,-0.014961243,0.008140564,0.03744507,-0.013031006,0.010223389,-0.0017261505,-0.0096206665,0.0018835068,0.0011062622,-0.00056123734,0.007385254,-0.006084442,-0.013771057,0.0043945312,0.0046653748,-0.0002887249,0.0033016205,-0.0056533813,-0.018218994,0.011390686,0.045928955,0.0143585205,-0.042541504,-0.00015676022,0.015930176,-0.0010700226,-0.013473511,-0.0055885315,-0.0082092285,-0.027053833,0.017532349,0.003540039,0.008392334,0.011657715,-0.02999878,-0.005077362,0.016845703,0.020568848,0.016113281,0.00289917,0.0070152283,0.020309448,-0.016235352,-0.002773285,-0.007347107,-0.008331299,0.017227173,0.01360321,-0.0067443848,-0.02720642,0.02104187,-0.010147095,0.01838684,0.019866943,-0.013694763,0.00045132637,-0.005924225,-0.011238098,0.0056495667,0.01210022,-0.0054855347,-0.013671875,-0.02243042,0.011833191,0.051452637,-0.01436615,-0.0042266846,0.022781372,0.0039138794,0.022445679,0.035064697,0.013580322,0.036956787,0.031951904,-0.015899658,-0.011657715,0.017608643,-0.014419556,-0.03112793,0.006828308,-0.004627228,-0.017730713,0.026763916,0.027877808,-0.001616478,-0.021408081,-0.019622803,0.0046195984,-0.0259552,0.018112183,-0.018066406,0.005027771,-0.027862549,-0.014198303,0.0051956177,-0.01889038,-0.034729004,-0.029205322,-0.006793976,-0.006690979,-0.042053223,0.011482239,-0.02330017,0.011886597,-0.021636963,-0.0026836395,0.0049552917,0.024658203,-0.015533447,-0.016601562,-0.00111866,0.031021118,0.015640259,0.013885498,0.028213501,-0.018630981,-0.036132812,-0.025878906,0.0063438416,-0.019180298,0.025131226,-0.009399414,0.033477783,0.014312744,-0.011779785,-0.0045394897,-0.013053894,-0.0036792755,-0.01373291,-0.01626587,-0.00774765,0.002122879,0.006439209,-0.00365448,-0.011253357,0.038024902,-0.029312134,-0.018157959,0.02861023,0.04055786,0.006137848,0.041748047,-0.020019531,-0.015701294,-0.009468079,-0.0025539398,-0.017211914,0.01626587,0.0012044907,0.014175415,-0.014953613,-0.006549835,0.023452759,-0.0032463074,0.00041007996,0.02468872,-0.0026245117,-0.00021374226,0.02999878,0.011787415,0.0007414818,-0.01953125,-0.0098724365,0.023742676,0.026504517,0.014678955,-0.006462097,-0.015914917,0.010276794,-0.026657104,0.016525269,0.006427765,-0.006362915,-0.045562744,-0.01436615,-0.03326416,0.009780884,0.0069389343,0.022018433,-0.005580902,0.0158844,-0.017730713,-0.020904541,-0.024154663,0.033203125,0.009773254,-0.014434814,-0.0026836395,0.00308609,0.024505615,-0.025177002,0.0024089813,-0.04611206,-0.03060913,-0.0018835068,-0.017211914,0.02708435,0.009384155,-0.000096678734,-0.011276245,-0.014953613,-0.0016174316,0.0036315918,0.0289917,-0.023803711,-0.006706238,0.018356323,0.010261536,-0.0181427,0.017227173,-0.0058555603,-0.0027370453,0.014274597,-0.01109314,0.007709503,-0.017211914,0.03555298,0.007965088,-0.004184723,0.033172607,0.0045051575,0.018310547,-0.03286743,0.013931274,0.01071167,-0.01108551,0.042510986,-0.030212402,-0.007347107,0.010116577,-0.033935547,-0.031921387,0.014526367,0.0158844,0.025863647,-0.011772156,0.034423828,-0.010391235,-0.019195557,0.029830933,0.009895325,-0.023010254,-0.017044067,0.034576416,-0.0014295578,-0.00030612946,-0.0034179688,-0.017501831,-0.03353882,-0.017974854,0.017150879,-0.0040397644,-0.015029907,0.019851685,0.01651001,0.034729004,0.0003478527,0.01399231,0.016525269,0.0112838745,0.026763916,0.0035305023,0.042510986,-0.0079193115,-0.026107788,0.013626099,0.0029888153,-0.017944336,-0.008003235,0.00022792816,0.006072998,-0.042419434,0.008148193,0.009765625,0.036132812,-0.022323608,0.017089844,-0.028686523,-0.014060974,-0.032562256,-0.01675415,-0.023391724,0.018600464,0.037841797,0.008659363,0.020462036,0.006164551,-0.02708435,0.009140015,0.05722046,0.0017185211,-0.029953003,-0.009788513,0.015701294,0.008224487,0.0069122314,0.01109314,-0.0019741058,-0.016067505,0.0069503784,-0.007965088,0.009178162,-0.008613586,0.008934021,-0.0028820038,-0.006641388,-0.0010900497,0.026260376,0.0033493042,-0.009506226,-0.0016479492,0.0050468445,0.028884888,0.0390625,-0.0008006096,0.027648926,0.026016235,-0.037109375,0.056121826,0.00137043,0.022537231,-0.016815186,0.0015220642,-0.039276123,-0.019363403,-0.005558014,-0.009223938],"createdAt":"2026-04-18T19:26:22.880Z","updatedAt":"2026-04-22T13:31:51.344Z","lastSeenAt":"2026-04-22T13:31:51.344Z","tsv":"'/api/v1/transactions/351':82,172 '/request':13,28 '0.02':12,27,69,120 '000':115 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':128 '20':114 '6':123 'Base network API' 'USDC micropayment endpoint' 'accept':93 'access':7,22,38,90,139,181 'address':127 'advertis':138 'ai/ml':58 'amount':111 'analyt':57 'api':6,21,37,54,132,151,180 'avail':206 'base':9,24,77,116,130 'beyond':176 'call':4,19 'cannot':202 'categori':191 'collect':48 'confirm':204 'connect':160 'contain':103 'content':166 'data':56,62 'decim':124 'doc':150 'document':145 'endpoint':32,81,173,190 'exact':168 'extrem':147 'financ':60 'function':169 'gate':141 'generic':178 'given':122 'header':102 'host':46 'includ':195 'infer':59 'infrastructur':64 'key':133 'label':182 'land':186 'limit':136 'list':84,188 'lowpaymentfee' 'lowpaymentfee.com':34 'mani':189 'materi':207 'maximum':110 'network':78 'no-api-key' 'page':155,187 'paid':125 'path':198 'pay':2,17,51 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':50 'payment':42,101,107,144 'per':3,18,52,70 'post':94 'post-method' 'premium':5,20,36,89,179 'premium API access' 'price':67,152 'prompt':162 'proof':108 'protocol':43 'provid':35 'pure':142 'purpos':201 'rate':135 'readm':154 'render':157 'request':53,71,95 'requir':97,112 'settl':72 'site':45,87,184 'span':55 'spars':148 'specif':80,197 'tier':91 'unclear':175 'unit':117 'usd':121 'usdc':15,30,74,119 'usdc-base' 'util':65 'valid':105 'via':10,25,39 'wallet':161 'web3':61 'x':100 'x-payment':99 'x402':11,26,41,106 'x402 API' 'x402-payment'","prices":[{"id":"0af5cd5d-6bd0-4d42-8c62-b9857fe5598b","listingId":"941ac89f-fe50-4c16-9263-8af5eedc42a9","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/351","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:22.880Z"}],"sources":[{"listingId":"941ac89f-fe50-4c16-9263-8af5eedc42a9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/351","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:22.880Z","lastSeenAt":"2026-04-22T13:31:51.344Z"}],"details":{"listingId":"941ac89f-fe50-4c16-9263-8af5eedc42a9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/351 \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","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/351"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/351"}],"useCases":["Programmatic access to premium data or services without subscription","Agent-driven API consumption with per-call crypto payment","Testing x402 payment flows on Base network"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents with x402 payment capability on Base","Users who prefer no-subscription, no-rate-limit API consumption"],"notFor":["Users needing detailed documentation or guaranteed SLAs","Anyone without USDC on Base network","Use cases requiring known, well-documented response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.115Z"},"updatedAt":"2026-04-22T13:31:51.344Z"}}