{"id":"968e908a-e3cd-41db-bad8-061db65a061e","shortId":"2dFfdy","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 at /api/v1/payments/332 is labeled \"Premium API Access\" and accepts POST requests, charging up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. No API keys, rate limits, or upfront commitments are required — each request is settled individually via an on-chain micropayment.\n\nThe broader platform advertises multiple API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. However, the crawled documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no further technical detail, so the actual functionality behind each endpoint — including this /api/v1/payments/332 endpoint — is not documented beyond its title.\n\nThe x402 challenge is live and well-formed: it specifies the USDC contract on Base (0x8335…), a payTo address, a 300-second timeout, and exact-scheme payment. Because there is no OpenAPI spec, no request/response schema, and no documentation describing what \"Premium API Access\" actually returns, agents should treat this as a minimally documented endpoint whose concrete behavior is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-endpoint","micropayment"],"categories":["api-platform","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","USDC pay-per-call","Base network API","premium API access"],"warnings":["No OpenAPI or schema available — request and response formats are unknown.","All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no technical content.","The purpose of /api/v1/payments/332 ('Premium API Access') is not explained anywhere; it may be a generic or placeholder endpoint.","Platform lists many endpoint categories (AI, finance, data) but none have documented behavior."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/332","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/payments/332","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 pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, and all documentation pages return only a wallet-connect prompt. The actual functionality of this specific endpoint is undocumented, making it effectively a stub listing.","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":"2026-04-19T07:08:21.339Z","embedding":[-0.024612427,-0.036956787,0.044525146,0.017242432,0.006755829,-0.02355957,-0.014831543,0.027053833,0.079589844,-0.064086914,0.03366089,-0.0435791,-0.043121338,-0.030532837,-0.029937744,0.010536194,-0.0004684925,0.001168251,-0.030410767,0.02357483,0.023635864,-0.019851685,-0.026901245,0.033966064,0.0038013458,-0.01550293,-0.008987427,-0.009262085,-0.006313324,-0.043884277,0.043395996,-0.027420044,-0.010070801,0.0055274963,-0.014099121,-0.01663208,-0.0013532639,0.030822754,0.027008057,-0.0050964355,-0.0060310364,-0.0552063,0.0013504028,-0.0211792,-0.060913086,-0.00027012825,-0.0033359528,-0.022384644,0.006416321,0.005317688,-0.03125,-0.0066719055,-0.009101868,0.0036087036,0.016448975,0.008522034,0.0046806335,0.0019741058,0.013259888,0.01133728,-0.01550293,-0.0657959,-0.019454956,-0.0069770813,0.0056991577,0.058746338,-0.016784668,0.04550171,0.012260437,0.06530762,0.035217285,0.05947876,0.023803711,0.010498047,-0.00894165,-0.008666992,0.008781433,0.05831909,-0.0049591064,-0.023956299,-0.010040283,-0.014976501,-0.04711914,0.0019683838,-0.02508545,-0.039031982,-0.022521973,0.020050049,-0.012969971,0.026153564,-0.0803833,0.0042495728,-0.014503479,0.0036792755,0.007587433,-0.005065918,-0.019744873,0.018508911,-0.005584717,0.012771606,0.002155304,-0.05001831,0.017181396,0.008476257,0.036590576,0.05255127,0.024154663,0.03062439,-0.0019083023,-0.0020713806,-0.028869629,0.021118164,-0.008407593,-0.008010864,0.018463135,0.0040626526,-0.01108551,0.013763428,-0.022521973,0.017913818,-0.04928589,0.048034668,-0.0011444092,-0.008377075,0.008613586,-0.041809082,-0.010261536,0.009727478,-0.029556274,0.0009379387,0.016357422,0.0057907104,0.037841797,-0.02217102,-0.024780273,0.012809753,-0.02848816,-0.016403198,-0.047698975,-0.031311035,0.046966553,-0.026062012,0.02142334,0.040985107,-0.095458984,0.0011854172,-0.04989624,0.011238098,-0.037353516,0.0006546974,-0.007217407,0.023101807,-0.012802124,-0.0045776367,-0.02722168,-0.030593872,-0.0064811707,0.037719727,-0.006008148,0.04864502,-0.007411957,0.022155762,0.023071289,0.010520935,0.02848816,0.026260376,-0.012786865,-0.06317139,-0.08483887,-0.02557373,-0.011016846,-0.025497437,-0.03149414,0.0018587112,-0.0063667297,-0.07470703,-0.027267456,-0.015007019,0.0006928444,-0.04144287,-0.0046463013,-0.034484863,0.01676941,-0.012664795,-0.068725586,-0.025283813,-0.02456665,0.06161499,0.033447266,0.020889282,0.03173828,-0.01739502,0.053649902,0.017227173,-0.02015686,-0.013633728,0.021591187,-0.029373169,0.017105103,-0.008010864,0.002286911,-0.034576416,0.03543091,0.07305908,0.015777588,-0.01751709,-0.015007019,-0.054840088,-0.042388916,-0.03527832,0.018203735,0.013038635,-0.0033283234,0.03289795,-0.0395813,-0.028671265,0.009391785,0.008903503,0.016235352,0.06317139,0.017868042,-0.017608643,0.030715942,0.0154953,-0.05923462,0.023483276,0.03250122,0.018096924,-0.018630981,-0.019851685,0.024215698,0.041137695,-0.026245117,0.014541626,-0.01550293,0.035369873,-0.01626587,0.010215759,0.018737793,-0.022140503,-0.027633667,-0.022613525,-0.028289795,0.025054932,0.0007162094,-0.028244019,-0.031433105,-0.0758667,0.044006348,0.037261963,0.0413208,-0.012565613,0.010856628,-0.023742676,-0.009994507,-0.06677246,0.06536865,0.070251465,-0.0063667297,-0.010299683,0.011260986,-0.017684937,-0.03137207,0.0011835098,-0.0054893494,-0.031173706,-0.023269653,0.0068359375,-0.038238525,-0.006690979,0.012321472,0.026885986,0.056793213,-0.005077362,-0.05126953,-0.030380249,-0.005054474,0.005771637,-0.03289795,0.0023727417,-0.0038528442,0.013938904,0.021209717,0.006515503,0.017150879,0.0027446747,-0.010757446,0.0047340393,0.006084442,-0.013198853,-0.033569336,0.020126343,-0.005470276,-0.06744385,-0.00039672852,-0.006298065,0.066833496,-0.04949951,0.042297363,-0.0137786865,0.0021896362,0.06555176,-0.012817383,-0.045562744,0.008621216,0.028396606,0.013366699,0.043945312,0.009468079,-0.030822754,-0.014923096,0.06585693,-0.015281677,-0.0025787354,0.017303467,0.013023376,0.037261963,-0.009666443,-0.064208984,-0.03024292,0.0047569275,-0.03756714,0.017181396,-0.025161743,0.042816162,-0.013076782,0.014160156,-0.022460938,-0.0063552856,-0.032989502,0.007987976,-0.006752014,0.008178711,-0.025466919,-0.006504059,0.018753052,0.008110046,-0.019088745,0.015281677,0.046844482,0.015113831,-0.010276794,-0.023635864,-0.029327393,-0.001627922,0.0029392242,0.025146484,0.020370483,0.03024292,0.050445557,-0.04611206,0.0112838745,0.02557373,0.018981934,0.038635254,-0.0039596558,0.011795044,-0.07421875,-0.05670166,-0.02810669,-0.03829956,0.033935547,0.016845703,-0.011833191,0.061431885,0.018478394,-0.02243042,-0.041503906,0.012878418,-0.04788208,-0.0018644333,0.04547119,-0.020751953,-0.01763916,0.00016486645,0.0035533905,0.0051078796,0.036254883,0.022521973,0.030349731,0.06500244,0.045837402,0.0066375732,0.023880005,0.0015325546,0.036743164,0.012565613,-0.031463623,-0.024215698,-0.017822266,0.032806396,-0.026443481,-0.011413574,-0.058288574,0.052856445,0.03704834,0.097229004,0.02758789,0.0038204193,0.038330078,-0.020858765,0.013114929,-0.035614014,-0.02684021,-0.030014038,-0.043273926,0.040283203,-0.014976501,-0.0062942505,-0.022323608,0.034362793,0.002319336,0.023635864,-0.024032593,0.05114746,0.0007901192,-0.00969696,0.01927185,0.022003174,0.052459717,0.061828613,-0.03363037,0.025787354,0.018722534,-0.029144287,0.007461548,0.0317688,-0.015670776,-0.00048160553,-0.057495117,-0.02407837,-0.013381958,-0.011795044,-0.054382324,0.0032482147,0.0041885376,0.02557373,0.02532959,-0.012687683,-0.023010254,-0.012237549,-0.016113281,-0.039123535,-0.0046653748,-0.031707764,0.0038795471,0.0385437,-0.023544312,-0.002855301,0.0052490234,-0.007270813,-0.007896423,0.019332886,0.024505615,-0.00060653687,-0.041259766,0.035125732,0.011657715,0.0036792755,0.014518738,0.037597656,0.015296936,0.028717041,0.05505371,0.017578125,-0.010543823,-0.059539795,0.02331543,-0.05581665,0.0076293945,0.025177002,-0.012054443,-0.0013132095,-0.02319336,-0.025360107,-0.03125,0.014678955,-0.0357666,0.0000046491623,0.019821167,-0.013244629,-0.04046631,-0.050476074,-0.02178955,-0.0009851456,0.059814453,0.018203735,0.0038146973,-0.06994629,-0.0067443848,0.0340271,0.013122559,0.02633667,-0.01499176,-0.007144928,-0.020721436,-0.033691406,-0.011375427,-0.024154663,0.026245117,-0.004032135,-0.00090169907,0.027770996,0.010108948,0.02180481,-0.00058984756,0.009727478,0.018295288,-0.026641846,-0.0008883476,-0.010902405,0.044677734,0.008407593,-0.0071411133,-0.050994873,0.040252686,0.013755798,0.032165527,-0.043670654,0.0019416809,-0.009727478,0.0087509155,0.015914917,-0.014595032,-0.014213562,-0.008659363,-0.050109863,-0.068725586,0.03878784,-0.016662598,0.031280518,0.021011353,0.0051879883,0.017425537,-0.0047187805,-0.01071167,0.014572144,-0.018463135,-0.008102417,-0.021499634,-0.033691406,-0.020629883,-0.01689148,-0.021392822,0.023498535,-0.021636963,0.011077881,0.009567261,-0.018310547,0.022964478,-0.011764526,-0.0020771027,0.016326904,-0.0017137527,0.02456665,0.038330078,0.008911133,-0.043060303,0.0143585205,0.0004117489,0.0013103485,0.0001026392,0.038909912,0.01977539,-0.008850098,-0.011764526,-0.016921997,-0.012756348,-0.020385742,0.0050735474,0.0038700104,0.0118637085,-0.003824234,-0.04586792,0.009681702,0.008224487,-0.03286743,-0.024520874,0.018676758,0.012397766,-0.036071777,0.017471313,0.03237915,0.049926758,-0.022949219,-0.0048980713,0.004840851,0.01828003,0.03527832,0.009414673,-0.013977051,0.012718201,-0.0052375793,0.01878357,0.00017440319,-0.018203735,0.015335083,0.012451172,0.024795532,0.028869629,0.012489319,-0.023635864,-0.030197144,0.0067710876,-0.014953613,-0.027404785,0.027709961,0.020324707,0.02861023,-0.023086548,0.018859863,0.014823914,-0.018676758,-0.013763428,-0.014595032,0.032928467,-0.022644043,-0.020095825,0.022323608,0.01663208,0.03390503,-0.054107666,-0.0013856888,0.0015869141,0.008125305,-0.02734375,-0.046539307,-0.036254883,0.0118637085,0.036346436,0.0095825195,0.029403687,0.0309906,-0.0006108284,0.008422852,0.030715942,-0.0015859604,-0.004722595,-0.019805908,-0.051940918,-0.020858765,-0.015213013,-0.005466461,-0.032104492,0.0126953125,-0.0044059753,-0.028503418,0.00070142746,-0.0068359375,-0.00198555,-0.017425537,0.0077667236,0.041259766,0.0061302185,0.01399231,-0.015853882,-0.03414917,-0.0039024353,0.0020389557,0.020324707,-0.043823242,0.0059432983,-0.016357422,-0.0075302124,0.0008993149,0.011413574,0.016433716,0.024673462,0.009048462,0.027954102,-0.044158936,0.04840088,-0.03756714,0.016418457,0.00982666,-0.04611206,-0.012207031,-0.026016235,-0.010864258,0.03265381,-0.022094727,-0.010383606,-0.02557373,-0.032684326,-0.015640259,-0.05380249,0.013908386,0.043762207,0.03552246,-0.03152466,0.0035572052,-0.00081443787,-0.003572464,-0.019485474,0.009124756,-0.021331787,0.022140503,0.021820068,0.009094238,-0.03515625,-0.030960083,-0.015136719,-0.0030136108,-0.04824829,-0.04498291,-0.019165039,0.0040397644,-0.0021457672,-0.009902954,-0.022338867,-0.02456665,-0.004512787,-0.042999268,0.006816864,0.0043754578,0.018432617,0.006713867,-0.022094727,-0.0034542084,0.010810852,-0.014862061,0.037719727,0.0077209473,-0.0063705444,-0.045715332,0.010246277,0.024230957,0.020126343,-0.0029678345,-0.01838684,-0.0065460205,-0.020233154,-0.05291748,-0.011962891,-0.009422302,-0.0077934265,-0.017059326,0.0041122437,-0.05706787,0.0034179688,-0.024978638,0.009628296,0.02293396,0.016418457,0.0044517517,-0.000041902065,0.019821167,-0.0028743744,-0.0137786865,-0.029296875,0.017730713,0.010940552,0.003873825,0.020462036,0.049682617,0.006752014,-0.026885986,0.009315491,0.0008134842,0.01272583,-0.02027893,0.0051345825,-0.020019531,0.009162903,-0.0070877075,-0.013656616,-0.036987305,-0.0028820038,0.097961426,-0.00466156,-0.014533997,-0.018966675,-0.021759033,0.021499634,0.024108887,-0.04144287,-0.014633179,-0.030914307,0.018005371,-0.023712158,0.01335907,0.002286911,0.019119263,-0.014678955,-0.057495117,-0.02281189,-0.0009660721,-0.0146102905,-0.061340332,-0.02734375,-0.06756592,0.006023407,-0.013465881,-0.015113831,0.008323669,0.009162903,-0.017150879,-0.08709717,0.005504608,0.048339844,0.016098022,0.024169922,-0.007194519,0.019546509,0.02130127,-0.0362854,-0.0046424866,0.026351929,-0.025558472,-0.015426636,-0.02861023,0.015991211,-0.02130127,-0.01537323,0.01499176,0.009002686,0.009719849,-0.011070251,0.006134033,-0.009513855,0.021438599,-0.02078247,0.017745972,-0.010650635,-0.016067505,0.033569336,-0.044555664,0.02571106,0.01727295,0.0014953613,0.0022907257,0.031433105,0.039276123,-0.03878784,-0.011268616,0.016296387,0.004962921,0.037506104,-0.020874023,0.038146973,0.009437561,-0.0149002075,0.021392822,-0.01209259,-0.022949219,-0.03451538,-0.027816772,0.021240234,-0.0015363693,0.016983032,-0.014343262,0.0068893433,0.016098022,0.0015230179,0.019851685,-0.008140564,-0.023529053,-0.022628784,0.004676819,-0.0022010803,-0.0021514893,-0.0101623535,0.02458191,0.022354126,0.030700684,0.013153076,-0.01424408,0.0026226044,0.028579712,-0.00680542,0.006072998,0.025756836,-0.0040283203,0.0073776245,0.01826477,0.009185791,-0.045166016,-0.0143585205,-0.021087646,-0.015281677,-0.000243783,-0.010009766,-0.015731812,-0.0019283295,0.004711151,-0.009506226,-0.026245117,0.010032654,-0.02017212,-0.029296875,0.000028789043,-0.02507019,0.030029297,0.010093689,0.006549835,0.0005760193,-0.0011472702,0.039886475,0.004928589,-0.014305115,0.027023315,0.025863647,0.016357422,-0.025619507,-0.006175995,-0.016784668,-0.001912117,0.0036334991,-0.037475586,0.00017476082,0.04321289,-0.017532349,0.009887695,0.014678955,0.023513794,-0.004016876,0.013557434,-0.012756348,0.014160156,-0.01184082,0.032073975,-0.04763794,0.018600464,0.008262634,0.0032176971,-0.022003174,-0.011672974,-0.025665283,0.022567749,0.012710571,-0.0077323914,0.049835205,0.004184723,0.024368286,-0.022949219,-0.0154953,0.01058197,-0.024658203,-0.022369385,0.029769897,-0.0017900467,-0.0017633438,0.012107849,-0.025405884,0.030166626,-0.03881836,0.029800415,0.0010375977,-0.006996155,-0.0073509216,-0.033233643,-0.011528015,-0.013221741,-0.013702393,0.0039901733,0.0012149811,0.046417236,0.01625061,0.039489746,0.04776001,0.025344849,-0.0048980713,-0.035186768,-0.031402588,0.012756348,-0.018936157,0.016937256,-0.012031555,0.056427002,0.038146973,0.001786232,0.041625977,0.03869629,0.04284668,0.013702393,0.00447464,-0.017410278,0.010864258,-0.0027999878,0.025756836,-0.001627922,0.040924072,-0.040863037,0.030273438,0.020095825,0.034454346,-0.029693604,0.035003662,0.07525635,0.01399231,-0.013832092,0.04333496,-0.0066375732,-0.00868988,-0.0047912598,-0.012283325,0.04486084,0.010566711,0.053649902,0.041503906,0.022964478,-0.0074691772,0.01878357,-0.016845703,-0.033477783,0.057556152,0.024932861,-0.01838684,-0.012542725,-0.0087890625,0.011711121,-0.04937744,-0.032165527,0.022872925,-0.01134491,0.010322571,-0.0041885376,-0.0078125,-0.012756348,0.015838623,0.025665283,0.013290405,-0.018737793,0.02659607,0.035125732,0.00048971176,0.025512695,-0.0015220642,0.027114868,-0.023223877,-0.027526855,0.015548706,0.027709961,-0.013282776,-0.015602112,0.021972656,0.010536194,0.04309082,0.05114746,-0.017425537,0.009902954,0.035247803,0.015281677,-0.008644104,0.053955078,0.037750244,0.0146102905,0.04925537,0.024993896,0.03479004,-0.03652954,0.026794434,-0.006412506,0.006011963,-0.0020141602,-0.009010315,0.006706238,-0.016235352,0.021224976,-0.00029587746,-0.016357422,0.018722534,0.01663208,-0.012893677,-0.0019721985,-0.005874634,0.0067977905,-0.016952515,-0.009033203,0.013427734,-0.011810303,0.03930664,0.013168335,0.032958984,-0.019348145,0.022277832,-0.009971619,-0.021697998,0.0024604797,0.019638062,-0.030014038,0.013465881,-0.006137848,0.004558563,-0.05303955,0.014030457,0.028900146,-0.02178955,0.032836914,0.00818634,-0.000027537346,-0.00019907951,0.020248413,0.010261536,0.00258255,-0.006198883,-0.028564453,0.030426025,0.050811768,0.00036931038,0.002998352,-0.020339966,-0.003534317,0.01033783,-0.0035762787,-0.0022792816,-0.003162384,-0.020523071,-0.034057617,0.017456055,0.03213501,0.020568848,0.044006348,-0.025543213,-0.012458801,0.010826111,0.04220581,0.0077781677,-0.0044517517,-0.00043678284,0.020111084,-0.016906738,0.046447754,0.03152466,0.004459381,0.04333496,-0.0031375885,-0.024887085,0.005065918,-0.0047302246,0.021102905,-0.012397766,0.010429382,-0.007980347,0.025985718,-0.015716553,-0.03982544,0.009269714,-0.014846802,-0.015670776,-0.025482178,0.0062942505,0.005317688,0.030883789,0.03466797,0.014434814,-0.025375366,0.06274414,-0.011787415,0.042755127,-0.0040283203,-0.0049858093,0.048309326,0.021606445,0.038238525,0.028320312,0.015426636,-0.03463745,0.0262146,0.03186035,0.022872925,0.0141067505,0.0024547577,-0.0138168335,0.043395996,-0.002105713,0.028640747,-0.009567261,-0.0011253357,0.009124756,-0.0035858154,-0.0050697327,-0.00459671,-0.0065689087,0.0061416626,0.04650879,-0.027999878,-0.0076026917,-0.029037476,-0.01399231,0.026885986,-0.01586914,-0.0013074875,0.0036258698,-0.016357422,0.0129776,-0.019607544,-0.03173828,0.004272461,0.025802612,-0.044555664,-0.017059326,0.0033054352,0.020080566,-0.023254395,0.039764404,0.025726318,-0.000374794,0.015426636,0.0501709,-0.0049705505,0.030273438,-0.017318726,0.023620605,0.02848816,0.0102005005,-0.018707275,0.0028858185,0.0053482056,-0.018753052,0.015403748,0.036132812,-0.014045715,0.005256653,-0.0076293945,-0.014389038,0.010017395,0.011634827,-0.014862061,0.010772705,-0.019042969,-0.01878357,-0.00044631958,0.004070282,0.0006146431,0.009933472,-0.006164551,-0.014831543,0.01574707,0.037841797,0.017791748,-0.038146973,-0.000487566,0.0070266724,0.009681702,-0.027267456,-0.014305115,-0.004535675,-0.03237915,0.019378662,0.010429382,0.013702393,0.012641907,-0.01966858,0.002506256,0.025024414,0.014213562,0.021499634,0.00058698654,0.0014791489,0.02104187,-0.013298035,-0.00070619583,-0.009338379,-0.0096206665,0.012397766,0.019424438,-0.0073051453,-0.026245117,0.024337769,-0.004798889,0.020935059,-0.0004479885,-0.015319824,0.01524353,-0.009925842,0.0009675026,-0.00083875656,0.016815186,-0.008491516,-0.0071983337,-0.015960693,0.034088135,0.056854248,-0.015975952,-0.001156807,0.018707275,0.017425537,0.020462036,0.03366089,0.009277344,0.036102295,0.021972656,-0.02053833,-0.029159546,0.027923584,-0.01576233,-0.023803711,0.017913818,-0.015281677,-0.01676941,0.016693115,0.008354187,-0.0018358231,-0.027191162,-0.00881958,-0.011764526,-0.015411377,0.0124435425,-0.01902771,0.0129852295,-0.024505615,-0.00945282,0.0069236755,-0.030914307,-0.042633057,-0.021896362,0.0019435883,-0.012336731,-0.04663086,0.01146698,-0.022216797,0.0074882507,-0.030380249,-0.0035171509,-0.016433716,0.01713562,-0.014190674,-0.00970459,0.010139465,0.026565552,0.026245117,0.0043792725,0.024154663,-0.03062439,-0.023361206,-0.027557373,0.0024871826,-0.0059280396,0.022949219,0.0035705566,0.026931763,0.026916504,-0.010749817,-0.0019836426,-0.015403748,-0.0010795593,-0.019073486,-0.02029419,-0.027404785,0.027694702,0.016311646,-0.012054443,-0.009857178,0.036743164,-0.026550293,-0.013793945,0.029159546,0.041625977,0.0141067505,0.020324707,-0.019042969,-0.00806427,-0.0113220215,0.0049705505,-0.010116577,0.00015032291,0.015014648,-0.004180908,-0.009254456,0.006877899,0.028244019,-0.009849548,-0.005268097,0.02558899,0.0008997917,-0.014427185,0.03717041,0.0076408386,0.006790161,-0.0073051453,-0.013420105,0.02281189,0.0446167,0.010665894,0.003900528,-0.0048179626,0.0022506714,-0.012763977,0.015808105,0.021743774,-0.020462036,-0.038909912,-0.019958496,-0.027954102,0.018127441,0.0038795471,0.008651733,-0.0034999847,0.01966858,-0.024536133,-0.022735596,-0.025177002,0.031204224,0.018508911,-0.015716553,-0.014198303,0.004852295,0.014823914,-0.0395813,-0.00067043304,-0.03729248,-0.04296875,-0.008201599,-0.028213501,0.019805908,0.017547607,-0.008399963,0.0035896301,-0.008201599,0.00089263916,-0.0013217926,0.023239136,-0.0127334595,0.0011034012,0.04055786,0.0064811707,-0.026062012,0.02180481,-0.017089844,-0.006511688,0.014862061,-0.009101868,0.016586304,-0.01701355,0.038391113,-0.012138367,-0.0019569397,0.029144287,-0.010040283,0.012168884,-0.03463745,-0.00067424774,-0.0014390945,-0.007701874,0.03414917,-0.02470398,-0.01676941,0.0055274963,-0.02053833,-0.033843994,0.0017251968,0.013900757,0.031341553,-0.018112183,0.04434204,-0.018493652,-0.0141067505,0.026473999,0.013008118,-0.013191223,0.009170532,0.03152466,-0.0014867783,-0.0040626526,-0.0041999817,-0.0118637085,-0.033966064,-0.0024909973,0.018005371,-0.00217247,-0.007358551,0.0345459,0.009651184,0.049224854,-0.0044174194,0.026870728,0.0076065063,0.0064926147,0.018707275,0.0041389465,0.058135986,0.0017490387,-0.028869629,0.006828308,0.00831604,-0.029159546,0.0007328987,-0.012916565,-0.002117157,-0.041534424,0.013259888,-0.0104599,0.029800415,-0.021392822,0.01121521,-0.022399902,0.0023231506,-0.040130615,-0.0055122375,-0.023742676,0.009925842,0.024261475,0.0008544922,0.027954102,0.0028839111,-0.0259552,0.012832642,0.04446411,0.000017464161,-0.03567505,-0.0132369995,0.004524231,0.009361267,0.0036392212,0.0020313263,-0.01663208,-0.013244629,-0.0032196045,-0.018310547,0.010482788,-0.0066070557,0.0209198,0.0051116943,0.0014343262,-0.0078048706,0.031677246,-0.008338928,-0.0045051575,0.011520386,0.0054092407,0.034088135,0.03062439,-0.019058228,0.019561768,0.025253296,-0.030822754,0.0524292,0.002374649,0.023529053,-0.021392822,0.0011100769,-0.036987305,-0.023529053,-0.015151978,0.010139465],"createdAt":"2026-04-18T18:50:30.157Z","updatedAt":"2026-04-23T23:02:46.373Z","lastSeenAt":"2026-04-23T23:02:46.373Z","tsv":"'/api/v1/payments/332':57,184 '/request':13,28,154 '0.02':12,27,77,153 '000':71 '0x8335':208 '20':70 '300':213 '6':81 'Base network API' 'USDC pay-per-call' 'accept':46,64 'access':62,237 'actual':177,238 'address':211 'advertis':109 'agent':240 'ai':121 'analysi':125 'analyt':115 'api':5,20,38,61,86,111,236 'base':8,23,51,72,207 'behavior':251 'behind':179 'beyond':189 'broader':107 'call':4,19,84 'categori':112 'chain':104 'challeng':194 'charg':67 'classif':128 'commit':92 'concret':250 'connect':167 'contract':205 'convers':145 'crawl':158 'data':114,118 'decim':82 'describ':233 'detail':174 'doc':161 'document':159,188,232,247 'embed':129 'endpoint':55,149,181,185,248 'estim':139 'exact':218 'exact-schem':217 'exchang':134 'export':119 'feed':133 'financ':130 'form':200 'function':178 'gas':138 'generat':146 'geocod':143 'given':78 'howev':156 'i.e':76 'includ':113,182 'individu':99 'infrastructur':141 'insight':120 'key':87 'label':59 'learn':123 'limit':89 'list':148 'live':196 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':122 'metric':116 'micropay':105 'micropayment' 'minim':246 'multipl':110 'network':9,24,52 'on-chain':102 'openapi':225 'page':160 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,220 'payto':210 'per':3,18,36,83 'platform':6,21,39,108 'post':65 'post-endpoint' 'premium':60,235 'premium API access' 'price':132,155,162 'prompt':169 'protocol':44 'quot':137 'rate':88,135 'readm':163 'report':117 'request':37,66,96 'request/response':228 'requir':94 'return':164,239 'schema':229 'scheme':219 'second':214 'sentiment':124 'settl':98 'share':150 'spec':226 'specif':54 'specifi':202 'summar':127 'technic':173 'text':126 'timeout':215 'titl':191 'token':136 'treat':242 'unit':73 'unknown':253 'upfront':91 'usdc':15,30,47,75,79,204 'usdc-base' 'use':41 'util':142 'valid':144 'via':10,25,100 'wallet':168 'web3':131 'well':199 'well-form':198 'whose':249 'x402':11,26,43,193 'x402 micropayment API' 'x402-payment'","prices":[{"id":"476b9869-19fb-49f6-9e3e-78f903f18b6a","listingId":"968e908a-e3cd-41db-bad8-061db65a061e","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/payments/332","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:30.157Z"}],"sources":[{"listingId":"968e908a-e3cd-41db-bad8-061db65a061e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/332","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:30.157Z","lastSeenAt":"2026-04-23T23:02:46.373Z"}],"details":{"listingId":"968e908a-e3cd-41db-bad8-061db65a061e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/332 \\\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":"Endpoint returns HTTP 402 with x402 challenge specifying USDC on Base, maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/payments/332"},{"claim":"All listed endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/payments/332"},{"claim":"Platform advertises Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-call for API access without API keys or subscriptions","Demonstrating x402 micropayment protocol integration on Base","Agent-driven API consumption with on-chain USDC settlement"],"bestFor":["Developers exploring x402 pay-per-request patterns","Agents that can settle USDC micropayments on Base","Use cases requiring no-signup, no-rate-limit API access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Applications requiring free or fiat-settled endpoints","Production workloads that depend on well-documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:06.904Z"},"updatedAt":"2026-04-23T23:02:46.373Z"}}