{"id":"437a3017-cff9-46e3-b631-19d55ad2f61a","shortId":"VMnLTK","kind":"x402","title":"Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required.","description":"lowpaymentfee.com is an x402-enabled API marketplace that offers a variety of endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure/utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network. The platform requires no API keys, no rate limits, and no upfront commitments — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/transfers/182` is listed as \"Premium API Access\" and accepts POST requests. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which has 6 decimals), equating to $0.02 per call. Payment is settled on the Base L2 network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation beyond the landing page is extremely sparse (docs, pricing, and API pages all render only a \"Connect wallet\" prompt), so the actual behavior, request/response schemas, and data sources behind these endpoints are unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 API marketplace","pay-per-call API","USDC micropayment API","Base network API"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.","The purpose and behavior of /api/v1/transfers/182 ('Premium API Access') is completely undocumented; it is unclear what data or service it provides.","No request or response schema is available; integration requires trial-and-error.","The platform lists many endpoints on its landing page but none have documented schemas or example responses."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/182","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/transfers/182","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and no indication of what this specific 'Premium API Access' endpoint actually does. The docs, pricing, and API pages are all 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":"2026-04-19T14:05:17.050Z","embedding":[-0.024902344,-0.035736084,0.04800415,0.030685425,0.0054130554,-0.03643799,-0.019165039,0.040863037,0.068847656,-0.06341553,0.021881104,-0.036193848,-0.028152466,-0.02444458,-0.02658081,0.012046814,0.007911682,-0.0028648376,-0.040618896,0.03878784,0.007926941,-0.033203125,-0.024780273,0.019592285,-0.0009403229,-0.032440186,-0.004131317,-0.0143585205,-0.021072388,-0.032226562,0.047302246,-0.031585693,-0.013000488,0.026519775,-0.021636963,0.0040359497,-0.0031719208,0.038238525,0.024780273,-0.019638062,-0.0032081604,-0.05734253,0.0034542084,-0.025299072,-0.052642822,-0.00019741058,0.0021457672,-0.029754639,0.0043411255,0.00554657,-0.031951904,-0.008460999,-0.007663727,0.0004246235,0.006374359,0.012077332,-0.0045814514,0.0016670227,0.020690918,0.014595032,-0.010116577,-0.05883789,-0.011108398,-0.005870819,-0.0019893646,0.053253174,-0.017303467,0.04498291,-0.0071029663,0.0769043,0.016693115,0.040802002,0.043273926,0.01260376,-0.00061941147,0.00083208084,-0.012161255,0.072509766,-0.016143799,-0.028381348,-0.003156662,-0.02796936,-0.057800293,0.0023899078,-0.0075416565,-0.034210205,-0.014564514,0.022766113,-0.013038635,0.035614014,-0.06695557,-0.019515991,-0.015060425,0.010139465,0.014915466,-0.0053863525,-0.0039787292,0.015159607,-0.0039634705,0.025024414,-0.0024700165,-0.03781128,0.012870789,0.0073165894,0.032714844,0.028564453,0.018569946,0.018936157,0.0077934265,0.011917114,-0.037963867,0.025619507,-0.007881165,-0.014465332,0.022140503,-0.011917114,-0.002008438,0.022994995,-0.042266846,0.018569946,-0.04650879,0.03326416,0.015136719,0.004070282,0.0143966675,-0.04248047,-0.022216797,0.014579773,-0.027328491,-0.014503479,0.0154800415,0.008972168,0.039733887,-0.0018062592,-0.04006958,0.009216309,-0.022064209,-0.0129776,-0.042419434,-0.03552246,0.03805542,-0.024169922,0.009757996,0.0385437,-0.09484863,-0.011260986,-0.037750244,0.011772156,-0.03112793,-0.009346008,0.0023860931,0.010406494,-0.024673462,-0.018966675,-0.010818481,-0.025253296,-0.0031757355,0.023513794,-0.005680084,0.041809082,-0.028015137,0.032562256,0.02142334,-0.005016327,0.020568848,0.024642944,-0.009803772,-0.083496094,-0.08972168,-0.013336182,-0.0031814575,-0.040893555,-0.032196045,0.005794525,-0.020324707,-0.08282471,-0.019699097,-0.027709961,-0.008964539,-0.03387451,0.005809784,-0.028717041,0.023925781,-0.018463135,-0.057800293,-0.012748718,-0.02331543,0.06304932,0.023529053,0.026672363,0.029830933,-0.016540527,0.05795288,0.03479004,-0.018310547,-0.020629883,0.027435303,-0.018615723,0.012260437,-0.0064468384,0.019805908,-0.01979065,0.035827637,0.052825928,-0.0065727234,-0.027557373,-0.010856628,-0.04574585,-0.042053223,-0.021957397,0.021774292,0.019134521,-0.016952515,0.02557373,-0.049224854,-0.023132324,-0.0024528503,0.025375366,0.0064468384,0.06604004,0.0038280487,-0.009468079,0.034484863,0.013298035,-0.058624268,0.035980225,0.035980225,0.0037574768,-0.024612427,-0.03012085,0.043701172,0.024414062,-0.027328491,0.009063721,-0.010520935,0.03036499,-0.009239197,0.0011510849,0.003440857,-0.0017433167,-0.028671265,-0.028411865,-0.0077209473,0.020111084,-0.00187397,-0.017196655,-0.030685425,-0.09411621,0.05770874,0.030761719,0.035736084,-0.011672974,-0.0019721985,-0.011650085,0.0027256012,-0.075683594,0.075683594,0.074035645,0.0181427,-0.019073486,0.028793335,-0.010444641,-0.030136108,0.013328552,-0.002313614,-0.0440979,-0.017333984,0.029418945,-0.045776367,0.020202637,0.019104004,0.014526367,0.04510498,-0.01134491,-0.049682617,-0.021652222,-0.0045661926,-0.0011892319,-0.031982422,-0.0045433044,-0.00881958,0.019882202,0.022842407,-0.00056552887,0.014038086,-0.014762878,-0.0031642914,-0.0026798248,0.007484436,-0.023620605,-0.022750854,0.010635376,0.0023097992,-0.05609131,0.0063323975,-0.0066070557,0.052734375,-0.05050659,0.031951904,-0.012916565,0.010749817,0.0546875,-0.00034189224,-0.04458618,0.005519867,0.026290894,0.0065994263,0.03829956,0.011192322,-0.032836914,-0.013801575,0.08886719,-0.017211914,-0.0046081543,0.015510559,0.021072388,0.024291992,-0.008285522,-0.06298828,-0.037841797,0.0040245056,-0.038360596,0.0234375,-0.015548706,0.031097412,-0.017227173,0.0072631836,-0.032318115,-0.0006341934,-0.023117065,0.015182495,-0.0115737915,0.019439697,-0.01802063,-0.022720337,0.008293152,0.0046463013,-0.021209717,0.0079574585,0.04284668,0.026657104,-0.009643555,-0.01852417,-0.027893066,-0.0035705566,-0.019714355,0.025634766,0.023803711,0.026245117,0.054382324,-0.042266846,0.005836487,0.023590088,0.009590149,0.03704834,-0.008262634,-0.0045547485,-0.0670166,-0.044067383,-0.018356323,-0.03012085,0.032684326,0.019561768,-0.010978699,0.04559326,0.015510559,-0.024719238,-0.04058838,0.011116028,-0.048828125,0.007347107,0.04296875,-0.018096924,-0.021820068,0.0058059692,-0.010879517,0.012161255,0.035858154,0.017547607,0.025543213,0.08215332,0.032104492,0.004211426,0.021636963,-0.0082092285,0.02458191,0.019454956,-0.020767212,-0.022705078,-0.012992859,0.038879395,-0.020904541,-0.016021729,-0.059448242,0.057128906,0.04473877,0.09069824,0.035308838,0.00019299984,0.030761719,-0.01574707,0.006374359,-0.039367676,-0.02381897,-0.024597168,-0.04269409,0.03137207,0.0015134811,-0.0014629364,-0.02381897,0.05496216,0.005722046,0.025848389,-0.037200928,0.033966064,-0.0015411377,-0.022247314,0.013519287,0.013053894,0.04949951,0.05899048,-0.042938232,0.007987976,0.011192322,-0.03555298,-0.016082764,0.029281616,-0.0070762634,-0.013946533,-0.05114746,-0.031677246,-0.015182495,-0.005470276,-0.037200928,-0.00012922287,0.01398468,0.025054932,0.04763794,-0.011886597,-0.017074585,-0.025634766,-0.0058898926,-0.051849365,0.0023059845,-0.05166626,-0.0065345764,0.038085938,-0.02949524,-0.022644043,0.003124237,-0.0072784424,-0.021621704,0.01020813,0.0368042,-0.0014438629,-0.0501709,0.04260254,0.004196167,0.013092041,0.012786865,0.02923584,0.0256958,0.033691406,0.034576416,0.016662598,-0.012626648,-0.0657959,0.02281189,-0.04083252,0.008102417,0.029159546,-0.020431519,-0.012809753,-0.007911682,-0.038391113,-0.02885437,0.03274536,-0.027664185,-0.0115737915,0.016281128,-0.01512146,-0.025680542,-0.054138184,-0.027893066,-0.0068359375,0.06100464,0.028274536,0.0009860992,-0.07055664,-0.014389038,0.034423828,0.006401062,0.045135498,-0.014167786,-0.009338379,-0.010986328,-0.032592773,-0.00919342,-0.026992798,0.023925781,-0.004535675,-0.012878418,0.013465881,0.011711121,0.017745972,0.0011005402,0.02104187,0.02444458,-0.028274536,-0.003692627,-0.0036773682,0.022659302,0.012954712,-0.0070114136,-0.039916992,0.037872314,0.008583069,0.045043945,-0.037872314,-0.0066833496,-0.006099701,0.02178955,0.019622803,-0.01612854,-0.009796143,-0.0062561035,-0.03866577,-0.07141113,0.049682617,-0.035308838,0.03878784,0.02835083,0.00046133995,0.023452759,-0.010734558,-0.0008740425,0.017028809,-0.027740479,-0.01852417,-0.018432617,-0.032318115,-0.02104187,-0.0047454834,-0.019302368,0.019760132,-0.02255249,0.01902771,-0.007911682,-0.029052734,0.011054993,0.006149292,-0.0064964294,0.011657715,0.012527466,0.036193848,0.042419434,0.015350342,-0.031829834,0.019363403,-0.0050239563,0.006134033,-0.00059986115,0.04473877,0.033843994,-0.0012083054,-0.0013599396,-0.008255005,-0.0022468567,-0.020385742,0.0010004044,0.004234314,0.0063934326,-0.003742218,-0.038726807,-0.001253128,0.0068359375,-0.029129028,-0.03289795,0.02067566,0.0066871643,-0.036743164,0.018325806,0.022918701,0.03945923,-0.022537231,0.0059509277,-0.008491516,0.047210693,0.028259277,0.00819397,-0.017028809,0.01914978,-0.012748718,0.021087646,-0.011383057,-0.0053138733,0.027175903,0.006954193,0.006385803,0.016860962,0.0046463013,-0.026657104,-0.04989624,0.008239746,-0.016357422,-0.03201294,0.020965576,0.0049209595,0.0259552,-0.020080566,0.02545166,0.010070801,-0.015823364,-0.020324707,-0.0033550262,0.03591919,-0.021087646,-0.013702393,0.013313293,0.0076179504,0.020065308,-0.059051514,-0.0035800934,-0.002861023,0.00970459,-0.031951904,-0.044769287,-0.03375244,0.005832672,0.02381897,0.0041122437,0.0335083,0.03656006,-0.013221741,0.004776001,0.025482178,0.0068969727,-0.011138916,-0.016967773,-0.04699707,-0.020050049,-0.0074310303,-0.0005393028,-0.037384033,0.0071411133,-0.0054512024,-0.02532959,0.01096344,-0.008865356,-0.002840042,-0.010772705,0.00005030632,0.05505371,-0.007232666,0.02229309,-0.020690918,-0.04953003,-0.010887146,0.0023536682,0.014541626,-0.046844482,0.013557434,-0.016784668,0.0016899109,0.015045166,0.010505676,0.024887085,0.02305603,0.015701294,0.024749756,-0.042419434,0.04586792,-0.03704834,0.010734558,-0.0025424957,-0.035980225,-0.011047363,-0.023880005,-0.009719849,0.03967285,-0.030319214,-0.004234314,-0.03152466,-0.034179688,-0.009155273,-0.048614502,0.008369446,0.033477783,0.040496826,-0.031555176,-0.002729416,-0.0021648407,0.011306763,-0.015007019,0.009269714,-0.014427185,0.010047913,0.027816772,-0.0029659271,-0.027770996,-0.03125,-0.0309906,-0.011245728,-0.047851562,-0.052825928,-0.0155181885,0.009536743,-0.0077400208,-0.0020771027,-0.03189087,-0.03161621,0.0012187958,-0.03845215,0.0028533936,0.0021152496,0.016220093,0.0026340485,-0.024154663,0.009979248,0.014297485,-0.017959595,0.041107178,0.014450073,-0.00060749054,-0.04260254,0.012718201,0.00081014633,0.022705078,-0.011383057,-0.025436401,-0.0037651062,-0.020568848,-0.059051514,-0.005870819,0.00035762787,-0.007980347,-0.008102417,0.0027561188,-0.049865723,0.0011177063,-0.021057129,0.0011253357,0.018218994,0.015403748,0.008758545,-0.0021953583,0.023468018,0.006290436,-0.011993408,-0.020996094,0.0069999695,0.010276794,0.0025615692,0.032165527,0.0524292,0.008628845,-0.024307251,0.0016717911,0.011688232,0.016342163,-0.023895264,0.01247406,-0.019485474,0.011413574,-0.009925842,-0.008903503,-0.030685425,0.0048332214,0.07635498,-0.0018825531,-0.0051994324,-0.0055007935,-0.01739502,0.01890564,0.03036499,-0.038208008,-0.008529663,-0.033203125,0.017364502,-0.027999878,0.012283325,0.013961792,0.01777649,-0.014190674,-0.0524292,-0.015380859,-0.015609741,-0.004837036,-0.054595947,-0.02420044,-0.06762695,0.010971069,-0.017089844,-0.023162842,0.003692627,0.01499176,-0.01852417,-0.07800293,0.001408577,0.057800293,0.004486084,0.029006958,-0.008865356,0.004573822,0.03201294,-0.028411865,0.003364563,0.020721436,-0.029464722,-0.02859497,-0.02305603,0.02192688,-0.013206482,-0.009719849,0.008171082,0.001294136,0.017181396,-0.008056641,0.01776123,-0.004486084,0.029418945,-0.014709473,0.014343262,-0.0072250366,-0.0079574585,0.030456543,-0.041290283,0.027191162,0.01953125,-0.002943039,0.013870239,0.027679443,0.041992188,-0.037017822,-0.009231567,0.008361816,0.009315491,0.034362793,-0.017944336,0.045440674,0.010246277,-0.016342163,0.017730713,-0.013519287,-0.02166748,-0.01574707,-0.023834229,0.038024902,0.00028252602,0.010955811,-0.020965576,0.01096344,0.020248413,0.009979248,0.0061683655,-0.0055007935,-0.01751709,-0.025161743,-0.007232666,0.0002605915,-0.001950264,-0.009239197,0.023727417,0.020080566,0.03729248,0.0047416687,-0.022613525,-0.00970459,0.041748047,-0.0045661926,-0.008995056,0.02659607,0.006340027,0.020401001,0.01776123,0.011161804,-0.05203247,-0.019958496,-0.010696411,-0.023864746,0.004432678,-0.0069007874,-0.008613586,-0.004436493,0.004234314,-0.014511108,-0.018569946,0.009513855,-0.04006958,-0.024505615,0.005630493,-0.014953613,0.025650024,0.0077819824,0.014839172,-0.0057029724,-0.011276245,0.03945923,0.0008611679,-0.0154418945,0.031707764,0.039276123,0.020751953,-0.033050537,-0.005268097,-0.02166748,-0.01864624,-0.0041885376,-0.04763794,0.01626587,0.04537964,-0.023468018,0.00472641,0.013374329,0.02670288,-0.0029735565,-0.002210617,0.0012664795,0.026290894,-0.019744873,0.033355713,-0.049224854,0.021377563,0.008216858,0.003435135,-0.015609741,-0.017684937,-0.025802612,0.02029419,0.00036883354,-0.01991272,0.043640137,0.014335632,0.01737976,-0.014472961,-0.015266418,0.020462036,-0.027404785,-0.01651001,0.028823853,-0.014427185,0.0007119179,0.0021820068,-0.01737976,0.0259552,-0.02998352,0.015060425,0.016616821,-0.0013961792,-0.023971558,-0.009490967,-0.0138549805,-0.009124756,-0.018234253,0.00069093704,-0.0040283203,0.042510986,0.017181396,0.036499023,0.055419922,0.015403748,-0.0064353943,-0.0309906,-0.022064209,0.0041275024,-0.018936157,0.010475159,-0.0061073303,0.050445557,0.03643799,-0.007419586,0.029754639,0.0262146,0.034088135,0.006916046,0.01348114,-0.026168823,0.01612854,-0.004623413,0.031433105,-0.0018405914,0.03845215,-0.027526855,0.017486572,0.013114929,0.01713562,-0.023895264,0.032806396,0.068359375,0.010284424,-0.0062408447,0.043121338,-0.0031642914,-0.008491516,0.00032496452,-0.029205322,0.042877197,0.00737381,0.048431396,0.046539307,0.0023880005,-0.0038452148,0.022216797,-0.03149414,-0.02029419,0.06011963,0.033233643,-0.01361084,-0.012794495,-0.011489868,0.013145447,-0.0423584,-0.03086853,0.022079468,-0.026321411,-0.0024414062,-0.012886047,-0.025497437,-0.0061416626,0.013175964,0.012825012,0.020706177,-0.007133484,0.028381348,0.03652954,-0.00020861626,0.032440186,-0.005718231,0.027938843,-0.0129776,-0.029647827,0.020080566,0.022460938,-0.0016374588,-0.01651001,0.03414917,0.006214142,0.04522705,0.038085938,-0.02293396,0.011192322,0.029342651,0.0059547424,-0.005695343,0.05682373,0.05065918,0.027252197,0.035095215,0.027709961,0.03201294,-0.03125,0.011695862,-0.001408577,0.0033798218,-0.0062065125,-0.004878998,0.0073661804,-0.010940552,0.019195557,0.0064849854,-0.0075302124,0.021438599,0.028533936,-0.00819397,-0.007949829,-0.006225586,0.014503479,-0.02281189,0.0024929047,0.014266968,-0.019943237,0.0423584,0.01159668,0.029159546,-0.018112183,0.015106201,0.0004901886,-0.022644043,-0.0077819824,0.025146484,-0.03164673,0.0082092285,-0.014205933,0.010826111,-0.045928955,0.014808655,0.030212402,-0.017425537,0.026885986,0.0020484924,-0.0017127991,-0.008094788,0.026733398,0.0001282692,-0.00642395,-0.007926941,-0.018234253,0.033691406,0.047698975,0.007637024,0.011642456,-0.026245117,-0.004989624,0.009506226,-0.007484436,0.000073611736,-0.01348114,-0.023330688,-0.019165039,0.028686523,0.036193848,0.027679443,0.05496216,-0.026412964,-0.008415222,0.0069351196,0.039855957,0.0018196106,-0.01096344,-0.0075683594,0.028259277,-0.023986816,0.043304443,0.042938232,0.012329102,0.042419434,-0.002313614,-0.009849548,0.006832123,-0.0050086975,0.023132324,-0.017089844,0.0013046265,0.0011711121,0.032287598,-0.011520386,-0.036315918,0.014503479,-0.004878998,-0.023925781,-0.010902405,0.021499634,0.005344391,0.026000977,0.0435791,0.023986816,-0.01802063,0.060394287,-0.011985779,0.03466797,0.00095558167,-0.017669678,0.052093506,0.009048462,0.022888184,0.023040771,0.015899658,-0.037384033,0.015304565,0.029693604,0.021453857,0.012886047,0.003753662,-0.0036029816,0.036621094,-0.0011262894,0.03012085,-0.00466156,-0.0014925003,0.0005431175,-0.005115509,-0.017288208,-0.0011940002,-0.010734558,0.0022792816,0.050964355,-0.024337769,0.0000023245811,-0.015045166,-0.010215759,0.028671265,-0.013084412,0.009056091,-0.02217102,-0.028335571,0.010726929,-0.019943237,-0.025634766,0.0079956055,0.022415161,-0.04525757,-0.023284912,0.0143585205,0.023498535,-0.025543213,0.029830933,0.02848816,0.0008993149,-0.0029125214,0.042022705,-0.016403198,0.02885437,-0.016967773,0.037231445,0.03338623,0.009674072,-0.021560669,-0.006767273,0.003019333,-0.017669678,0.015609741,0.02961731,-0.011291504,-0.00085783005,-0.0031929016,0.0048103333,-0.0009741783,-0.00028800964,-0.013214111,0.013664246,-0.020614624,-0.0077934265,-0.0036392212,0.009483337,0.004673004,-0.0013237,-0.020126343,-0.016738892,0.012168884,0.018508911,0.01991272,-0.03793335,-0.0075035095,0.0052833557,0.010925293,-0.017089844,-0.02229309,0.0030403137,-0.039245605,0.014976501,0.0009880066,0.015670776,0.014770508,-0.029388428,0.0014228821,0.01687622,0.009788513,0.019256592,0.003818512,-0.011100769,0.015068054,0.0017623901,-0.009933472,-0.0057678223,-0.0020008087,0.014892578,0.02331543,-0.014205933,-0.03152466,0.03253174,-0.000051558018,0.019729614,0.0032634735,-0.009048462,0.019882202,-0.009300232,-0.0030460358,0.009757996,0.02381897,-0.006340027,-0.0006866455,-0.010688782,0.025253296,0.0592041,-0.009895325,-0.001200676,0.023513794,0.01777649,0.016418457,0.050476074,0.006881714,0.040130615,0.027526855,-0.018234253,-0.01777649,0.031036377,-0.009559631,-0.02418518,0.009963989,0.007507324,-0.009223938,0.025405884,0.0070114136,0.0050468445,-0.03149414,-0.012832642,-0.011375427,-0.004043579,0.009025574,-0.01927185,0.010505676,-0.02079773,-0.010498047,0.006626129,-0.031219482,-0.043548584,-0.0022468567,0.0019350052,-0.004173279,-0.05206299,0.0026817322,-0.020736694,-0.0036315918,-0.02494812,-0.004589081,-0.0065193176,0.023727417,-0.026748657,-0.008522034,-0.00856781,0.029388428,0.02355957,0.007671356,0.02684021,-0.028305054,-0.02859497,-0.031829834,0.015396118,-0.018051147,0.016098022,0.0056762695,0.026626587,0.02268982,-0.0067977905,-0.0025806427,-0.01902771,-0.015136719,-0.021575928,-0.011314392,-0.030166626,0.02848816,0.013717651,-0.019363403,-0.012664795,0.032989502,-0.01675415,-0.009819031,0.033691406,0.04360962,0.007030487,0.028411865,-0.019424438,0.0034122467,-0.015899658,-0.0072898865,-0.016647339,0.0005145073,0.018920898,-0.0023498535,-0.0029830933,0.013687134,0.025558472,-0.014556885,-0.005569458,0.03753662,0.0075531006,-0.008491516,0.035369873,0.013252258,0.0013313293,-0.017593384,-0.016403198,0.02482605,0.046203613,0.017486572,0.019454956,0.0012483597,0.0019130707,-0.015960693,0.005680084,0.0149383545,-0.02305603,-0.042541504,-0.023086548,-0.03414917,0.022903442,-0.013328552,0.015899658,-0.005847931,0.025802612,-0.011627197,-0.024291992,-0.021438599,0.030960083,0.013519287,-0.0047340393,-0.014205933,0.0025596619,0.010192871,-0.032348633,-0.0016222,-0.038391113,-0.037963867,-0.0062026978,-0.016815186,0.023910522,0.009155273,-0.0035858154,-0.0060272217,-0.005432129,-0.00004285574,-0.0020008087,0.028076172,-0.016494751,0.0013113022,0.02998352,0.018539429,-0.016174316,0.020431519,-0.016067505,-0.0043144226,0.011291504,-0.013664246,0.016677856,-0.019104004,0.042419434,-0.007671356,0.008529663,0.035858154,-0.020431519,0.005203247,-0.028305054,0.007019043,0.0015125275,0.0004451275,0.037231445,-0.021759033,-0.027450562,-0.0005578995,-0.015312195,-0.03201294,-0.0009279251,0.011009216,0.036193848,-0.013427734,0.049835205,-0.0093307495,-0.0051651,0.016708374,0.014427185,-0.011108398,0.011260986,0.030883789,0.002117157,0.007911682,-0.0071144104,-0.0031318665,-0.03353882,-0.007297516,-0.0025405884,0.005722046,-0.011993408,0.031433105,0.013931274,0.04272461,-0.007965088,0.023422241,0.004524231,0.009017944,0.02319336,0.007774353,0.044433594,-0.011405945,-0.015106201,-0.0005583763,0.01146698,-0.023986816,0.008415222,0.001253128,0.0055351257,-0.040496826,0.01474762,-0.009468079,0.028778076,-0.024398804,0.01600647,-0.029754639,-0.0041046143,-0.04006958,-0.018692017,-0.022277832,0.0054893494,0.02067566,-0.0023097992,0.033966064,0.012916565,-0.025924683,0.01737976,0.0501709,-0.004547119,-0.034729004,-0.013763428,0.020095825,-0.00036597252,0.0021896362,0.011146545,-0.022216797,-0.016921997,-0.0017108917,-0.0129470825,0.0045433044,0.0004608631,0.012001038,0.01889038,-0.008918762,-0.015007019,0.033996582,-0.011253357,-0.0052948,0.021865845,0.0061416626,0.041137695,0.031341553,-0.013259888,0.012619019,0.013023376,-0.049102783,0.068359375,0.0032444,0.025482178,-0.0143966675,0.014579773,-0.034240723,-0.02229309,-0.015838623,0.012748718],"createdAt":"2026-04-18T19:27:41.585Z","updatedAt":"2026-04-22T15:02:24.748Z","lastSeenAt":"2026-04-22T15:02:24.748Z","tsv":"'/api/v1/transfers/182':102 '/request':13,30 '0.02':12,29,65,134,182 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':127 '20':120 '300':150 '6':130 'Base network API' 'USDC micropayment API' 'accept':110 'access':108 'across':49 'actual':208 'address':146 'advertis':116,156 'ai':52 'analysi':160 'analyt':51 'api':5,15,22,32,41,79,107,197 'asset':126 'attach':90 'base':8,25,73,122,142 'behavior':209 'behind':215 'beyond':187 'broader':154 'call':4,21,136 'caller':88 'categori':59 'challeng':115 'classif':163 'commit':87 'connect':203 'convers':175 'data':50,213 'decim':131 'doc':194 'document':186 'embed':164 'enabl':40 'endpoint':48,61,100,157,217 'equat':132 'estim':172 'exchang':167 'extrem':192 'feed':166 'financ':55 'gas':171 'generat':177 'geocod':173 'header':94 'howev':185 'infrastructure/utility':58 'json-response' 'key':16,33,80 'l2':143 'land':189 'learn':54 'limit':83 'list':104 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':53 'marketplac':42 'maxamountrequir':118 'network':74,144 'no-api-key' 'offer':44 'page':190,198 'paid':68 'pay':2,19 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request' 'payment':93,137 'per':3,20,66,135 'platform':6,23,76,155 'point':184 'post':111 'post-endpoint' 'premium':106 'price':63,165,183,195 'prompt':205 'quot':170 'rate':82,168 'render':200 'request':67,97,112 'request/response':210 'requir':17,34,77 'schema':211 'second':151 'sentiment':159 'settl':139 'simpli':89 'sourc':214 'spars':193 'specif':99 'summar':162 'text':161 'timeout':152 'token':169 'unit':123 'unknown':219 'upfront':86 'usdc':9,26,70,125 'usdc-base' 'valid':174 'varieti':46 'via':10,27 'wallet':204 'web3':56 'x402':11,28,39,92,114 'x402 API marketplace' 'x402-enabled':38 'x402-payment'","prices":[{"id":"cba83a94-b3ed-4979-8a87-00675e4dd947","listingId":"437a3017-cff9-46e3-b631-19d55ad2f61a","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/transfers/182","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:41.585Z"}],"sources":[{"listingId":"437a3017-cff9-46e3-b631-19d55ad2f61a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/182","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:41.585Z","lastSeenAt":"2026-04-22T15:02:24.748Z"}],"details":{"listingId":"437a3017-cff9-46e3-b631-19d55ad2f61a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transfers/182 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equating to $0.02","source_url":"https://lowpaymentfee.com/api/v1/transfers/182"},{"claim":"Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/transfers/182"},{"claim":"Docs, pricing, and API pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to utility or data APIs without managing API keys or subscriptions","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers wanting zero-friction, keyless API access via crypto micropayments","AI agents that can autonomously pay for API calls using x402","Users who prefer pay-as-you-go pricing with no minimums or commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:34.332Z"},"updatedAt":"2026-04-22T15:02:24.748Z"}}