{"id":"02ac356d-a25c-4fcd-9d60-4ee3d4fea3ca","shortId":"FFXwBt","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 an x402-enabled API platform 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, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe specific endpoint at `/api/v1/transactions/44` is labeled \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is via the x402 \"exact\" scheme with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\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. However, documentation pages (docs, pricing, API, README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual functionality behind each endpoint is unverified. The specific purpose of the `/api/v1/transactions/44` endpoint is unclear — the name \"Premium API Access\" is generic and no schema or documentation describes what data it returns or what input it expects.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["infrastructure","finance","llm"],"synonyms":["low payment fee","x402 api","micropayment api","pay per call api","usdc api","base network api","crypto payment api"],"warnings":["The specific functionality of /api/v1/transactions/44 is undocumented — 'Premium API Access' is a generic label with no description of inputs or outputs.","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.","No OpenAPI spec, request schema, or response schema is available — callers cannot know what to send or expect back.","The platform lists many endpoints (AI, finance, utilities) but none are verified to actually return meaningful data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/44","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/44","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of this specific endpoint ('Premium API Access' at /transactions/44) is entirely unclear. All doc pages returned only 'Connect wallet' with no content.","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":"2026-04-19T13:31:53.000Z","embedding":[-0.029953003,-0.044525146,0.040161133,0.025634766,0.004135132,-0.027633667,-0.028060913,0.036224365,0.070129395,-0.07208252,0.033081055,-0.041229248,-0.032318115,-0.035125732,-0.016921997,0.015060425,-0.0059280396,0.010192871,-0.045959473,0.027954102,0.021530151,-0.015419006,-0.027038574,0.01939392,-0.00035357475,-0.013092041,-0.007537842,-0.0040779114,-0.016021729,-0.039611816,0.04147339,-0.02734375,0.004508972,0.014343262,-0.01927185,-0.009002686,-0.006378174,0.039001465,0.028656006,-0.016693115,-0.005645752,-0.06237793,-0.0035629272,-0.016494751,-0.056121826,-0.0059928894,0.0022277832,-0.02748108,0.0015010834,0.0059165955,-0.044830322,-0.011680603,-0.012367249,0.0061683655,0.004295349,-0.00013065338,-0.0079422,-0.006931305,0.016525269,0.010101318,-0.02067566,-0.061523438,-0.012863159,-0.008132935,-0.0013103485,0.064331055,-0.013168335,0.042938232,0.0071640015,0.059692383,0.038879395,0.045776367,0.03527832,0.02267456,0.009887695,0.0093688965,-0.0009713173,0.06201172,-0.015113831,-0.03286743,-0.0043792725,-0.014320374,-0.053131104,0.00018918514,-0.007751465,-0.048828125,-0.019989014,0.023742676,-0.024795532,0.027557373,-0.06549072,0.0017623901,-0.007663727,-0.00045752525,-0.0005617142,-0.0073623657,-0.01134491,0.01486969,-0.018798828,0.017303467,0.004005432,-0.040740967,0.01928711,0.016845703,0.033325195,0.040985107,0.023406982,0.024017334,0.0047836304,-0.006942749,-0.023788452,0.014373779,-0.008255005,-0.018035889,0.02935791,-0.0043296814,-0.012260437,0.010536194,-0.03414917,0.022598267,-0.044555664,0.04699707,0.010215759,-0.0017747879,-0.00022053719,-0.051605225,-0.014907837,0.008842468,-0.027633667,-0.005657196,0.00881958,0.022994995,0.032348633,-0.019836426,-0.026901245,0.011383057,-0.023513794,-0.0062446594,-0.04736328,-0.044158936,0.03805542,-0.036315918,0.022277832,0.042114258,-0.10852051,-0.00762558,-0.050628662,0.0016040802,-0.032989502,-0.011131287,-0.00036025047,0.015449524,-0.021347046,-0.013687134,-0.017990112,-0.02861023,0.000808239,0.043792725,-0.02558899,0.05203247,-0.023025513,0.020202637,0.021347046,0.012458801,0.027236938,0.031677246,0.0039100647,-0.07977295,-0.085998535,-0.019729614,0.0069503784,-0.027114868,-0.04031372,0.009429932,-0.009490967,-0.09033203,-0.02633667,-0.020843506,-0.010406494,-0.03237915,-0.00035715103,-0.034362793,0.027877808,-0.017974854,-0.05569458,-0.026885986,-0.031188965,0.06713867,0.025024414,0.016937256,0.02760315,-0.010131836,0.0592041,0.02960205,-0.010124207,-0.019973755,0.012001038,-0.01776123,0.018035889,0.004058838,0.011642456,-0.033691406,0.02784729,0.07476807,-0.004432678,-0.025802612,-0.0057296753,-0.060180664,-0.037231445,-0.041809082,0.018569946,0.005935669,-0.0039520264,0.039245605,-0.03186035,-0.037994385,-0.0022296906,0.02633667,0.010047913,0.06121826,0.0056114197,-0.008270264,0.032287598,0.01134491,-0.045532227,0.034851074,0.050628662,0.0058898926,-0.035705566,-0.036621094,0.035369873,0.04421997,-0.03100586,0.010925293,-0.011772156,0.02772522,-0.008377075,0.009521484,0.02230835,-0.008636475,-0.030441284,-0.025970459,-0.009689331,0.024887085,0.009056091,-0.025482178,-0.03488159,-0.08703613,0.044830322,0.046875,0.034057617,-0.0036334991,0.0016565323,-0.018630981,-0.011047363,-0.07348633,0.058441162,0.07562256,0.0075416565,-0.0102005005,0.028656006,-0.011627197,-0.040222168,0.004135132,-0.018188477,-0.023544312,-0.018371582,0.013694763,-0.04525757,-0.004508972,0.011627197,0.011955261,0.047576904,-0.011947632,-0.047302246,-0.029663086,-0.0046157837,0.011116028,-0.02168274,0.0056610107,-0.0041542053,0.010307312,0.017654419,-0.002210617,0.013305664,-0.0024757385,0.006137848,-0.004371643,0.0051879883,-0.015045166,-0.03161621,0.0019273758,-0.001156807,-0.0541687,0.0011701584,-0.0048675537,0.076293945,-0.042999268,0.04360962,-0.014266968,0.017318726,0.052459717,-0.00843811,-0.051513672,0.003835678,0.023666382,0.02822876,0.04071045,0.01966858,-0.036468506,-0.0049819946,0.08312988,0.0020046234,-0.0045928955,0.017868042,0.007045746,0.031677246,-0.014976501,-0.051727295,-0.022537231,0.00017976761,-0.04058838,0.023254395,-0.019210815,0.03427124,-0.021469116,0.00061416626,-0.02444458,-0.0013666153,-0.03414917,0.00409317,-0.018310547,0.004486084,-0.023269653,-0.023895264,0.014007568,0.0010328293,-0.017333984,0.0055770874,0.03967285,0.020690918,-0.010040283,-0.030517578,-0.033569336,-0.009849548,0.0041046143,0.023254395,0.021408081,0.020812988,0.046722412,-0.032287598,0.00030899048,0.022750854,0.018188477,0.044189453,-0.005554199,0.0041122437,-0.050811768,-0.0524292,-0.022750854,-0.04034424,0.02571106,0.026885986,-0.0064849854,0.0625,0.011398315,-0.017990112,-0.025039673,0.008300781,-0.040802002,0.0033397675,0.042663574,-0.0155181885,-0.025527954,0.0065193176,0.0029144287,0.0027446747,0.037750244,0.016281128,0.031707764,0.07293701,0.044647217,0.0020542145,0.028549194,-0.01083374,0.032348633,0.005241394,-0.028152466,-0.0368042,-0.02178955,0.021362305,-0.01876831,-0.007820129,-0.06689453,0.05532837,0.03805542,0.095581055,0.02494812,0.0024642944,0.03173828,-0.013015747,0.010925293,-0.016845703,-0.023208618,-0.021087646,-0.030929565,0.024780273,-0.015220642,-0.01486969,-0.019607544,0.028640747,-0.00007879734,0.021987915,-0.030731201,0.050476074,-0.012817383,-0.020599365,0.01725769,0.005340576,0.035095215,0.06518555,-0.040893555,0.031677246,0.02381897,-0.037078857,0.0070991516,0.04232788,-0.015594482,-0.0051956177,-0.0491333,-0.02053833,-0.0073890686,-0.015396118,-0.04940796,-0.00036263466,0.008964539,0.024368286,0.028793335,-0.020477295,-0.016067505,-0.007724762,-0.012084961,-0.046936035,-0.011116028,-0.03677368,0.0026493073,0.04989624,-0.03326416,-0.007408142,0.0063591003,-0.008422852,-0.0041999817,0.0055770874,0.01878357,-0.010673523,-0.051605225,0.032287598,-0.0020580292,0.029144287,0.0093307495,0.023376465,0.02381897,0.02809143,0.05722046,0.015541077,-0.015365601,-0.0670166,0.012527466,-0.049835205,-0.004798889,0.022888184,-0.026367188,-0.0019721985,-0.006011963,-0.03375244,-0.021972656,0.011947632,-0.030410767,0.004371643,0.012573242,-0.031585693,-0.024597168,-0.0592041,-0.01802063,-0.008102417,0.06506348,0.019226074,0.011222839,-0.066711426,-0.0034713745,0.03491211,0.008644104,0.019088745,-0.015701294,-0.003353119,-0.011489868,-0.029953003,-0.017990112,-0.020736694,0.023330688,-0.0010843277,-0.0023288727,0.014907837,0.0012245178,0.014625549,0.0032920837,0.006664276,0.025405884,-0.024459839,0.0037841797,-0.008590698,0.036621094,0.017333984,-0.016311646,-0.048095703,0.037139893,0.01600647,0.030929565,-0.039154053,-0.01108551,-0.0051231384,0.019180298,0.017211914,-0.016433716,-0.0087509155,-0.017074585,-0.045928955,-0.057006836,0.04156494,-0.023757935,0.03186035,0.018310547,0.0063438416,0.018478394,-0.006668091,-0.0009059906,0.016860962,-0.028396606,-0.0043907166,-0.02911377,-0.037902832,-0.022857666,-0.013168335,-0.02960205,0.019378662,-0.01675415,0.0044784546,0.003791809,-0.02305603,0.028366089,-0.0013599396,0.00032830238,0.018081665,0.0067253113,0.024032593,0.026321411,0.013626099,-0.049102783,0.020431519,-0.004436493,0.008529663,-0.010375977,0.049591064,0.02217102,-0.017822266,-0.004600525,-0.0063819885,-0.015274048,-0.01852417,-0.0064086914,0.001991272,0.0011062622,0.0014781952,-0.033111572,0.012123108,0.0038852692,-0.03363037,-0.026672363,0.015541077,0.0059280396,-0.031143188,0.021896362,0.03250122,0.044708252,-0.01826477,0.0042381287,0.005393982,0.033050537,0.03543091,0.012123108,-0.014465332,0.025772095,-0.009155273,0.02418518,-0.0044670105,-0.003932953,0.010383606,0.005809784,0.021728516,0.020141602,0.013015747,-0.026168823,-0.036376953,0.0033168793,-0.012527466,-0.022491455,0.022872925,0.019851685,0.03213501,-0.026382446,0.022216797,0.00655365,-0.016235352,-0.012313843,-0.014549255,0.042236328,-0.009880066,-0.019958496,0.013442993,0.00762558,0.021652222,-0.053131104,-0.0027389526,-0.0016803741,0.014923096,-0.014152527,-0.040618896,-0.03265381,0.009422302,0.034088135,0.014518738,0.022979736,0.03643799,-0.00434494,0.00484848,0.025985718,-0.008033752,-0.008178711,-0.008232117,-0.04928589,-0.019561768,-0.005973816,-0.00006514788,-0.032562256,0.015975952,-0.0025558472,-0.022521973,-0.00090265274,-0.01600647,-0.0028858185,-0.02041626,0.013687134,0.03945923,0.00894165,0.018249512,-0.015464783,-0.03390503,-0.002500534,0.01133728,0.012496948,-0.04348755,0.019958496,-0.015007019,-0.0052948,0.003774643,0.014923096,0.023788452,0.018615723,0.012931824,0.03945923,-0.051452637,0.050811768,-0.027008057,0.02015686,-0.000992775,-0.04324341,-0.011459351,-0.021697998,-0.015914917,0.036071777,-0.020751953,-0.012748718,-0.031707764,-0.02204895,-0.0049057007,-0.055541992,0.017913818,0.031707764,0.038391113,-0.029251099,0.0056114197,-0.0025119781,0.011062622,-0.009407043,0.012954712,-0.01902771,0.023986816,0.024032593,0.0024681091,-0.02003479,-0.018814087,-0.019012451,-0.014373779,-0.05126953,-0.058013916,-0.013336182,0.009880066,-0.014373779,-0.00818634,-0.028182983,-0.027053833,-0.0052871704,-0.03918457,0.01008606,-0.00818634,0.027023315,-0.0012998581,-0.029907227,0.0024089813,0.014289856,-0.008476257,0.035980225,0.009803772,0.0018606186,-0.04547119,0.013771057,0.018371582,0.021713257,-0.0015735626,-0.010627747,-0.012931824,-0.019454956,-0.052581787,-0.009719849,-0.012748718,-0.012825012,-0.013214111,0.0039253235,-0.055877686,-0.0050201416,-0.026031494,-0.004436493,0.028182983,0.010269165,0.022109985,-0.0034332275,0.021438599,-0.0048599243,-0.0062026978,-0.033325195,0.012069702,0.011634827,0.0087890625,0.01838684,0.054626465,-0.0113220215,-0.026260376,0.007926941,0.0025978088,0.014305115,-0.024917603,0.011421204,-0.015960693,0.014671326,-0.014816284,-0.0059432983,-0.040802002,-0.0039024353,0.08355713,-0.00466156,-0.013175964,-0.017333984,-0.01158905,0.01625061,0.032165527,-0.040771484,-0.003730774,-0.02508545,0.023071289,-0.01423645,0.009719849,-0.00015974045,0.021759033,-0.023254395,-0.052337646,-0.021362305,-0.0051879883,-0.01197052,-0.061309814,-0.02420044,-0.061157227,-0.00015878677,-0.01574707,-0.025100708,0.010025024,0.018585205,-0.01928711,-0.088134766,0.0010690689,0.051513672,0.0053482056,0.028198242,-0.007320404,0.014694214,0.037475586,-0.032196045,-0.0025253296,0.033325195,-0.03552246,-0.017120361,-0.013412476,0.020019531,-0.013549805,-0.01486969,0.011657715,0.0046081543,0.026748657,0.0013313293,0.0066108704,-0.015258789,0.025787354,-0.018676758,0.018585205,-0.018356323,-0.013572693,0.037628174,-0.04333496,0.028442383,0.0082092285,-0.0038719177,-0.0018234253,0.03741455,0.034729004,-0.038330078,-0.0131073,0.021865845,0.005832672,0.036468506,-0.018981934,0.04248047,0.010513306,-0.018173218,0.020370483,-0.00894165,-0.01108551,-0.018798828,-0.02998352,0.023208618,-0.00076818466,0.016220093,-0.026367188,0.0005440712,0.020858765,0.0014648438,0.0055618286,-0.011657715,-0.02722168,-0.030929565,-0.00032043457,0.0035629272,-0.0022087097,0.00018572807,0.026611328,0.010414124,0.039916992,0.013832092,-0.0085372925,0.0082092285,0.029388428,-0.01763916,0.00047016144,0.023803711,-0.00025820732,0.01638794,0.017059326,0.019256592,-0.047302246,-0.013587952,-0.018463135,-0.013069153,-0.0036468506,-0.0057144165,-0.01626587,-0.00223732,0.0005221367,-0.0024967194,-0.03668213,0.0029525757,-0.028747559,-0.03353882,-0.003730774,-0.019866943,0.02003479,0.006324768,0.008979797,0.005794525,-0.0018758774,0.03829956,-0.0017118454,-0.02355957,0.032714844,0.03857422,0.02243042,-0.030761719,-0.011734009,-0.009941101,-0.00856781,-0.0054244995,-0.034576416,0.0056381226,0.03543091,-0.016601562,0.008644104,0.002614975,0.021102905,-0.0057640076,0.0022792816,-0.012763977,0.022323608,-0.010169983,0.037231445,-0.04171753,0.021240234,0.015792847,0.0040664673,-0.018493652,-0.022720337,-0.036895752,0.021469116,-0.0020751953,-0.015686035,0.04736328,0.01360321,0.037139893,-0.020904541,-0.023345947,0.007045746,-0.030197144,-0.02116394,0.030029297,-0.011894226,0.0035552979,0.023513794,-0.02784729,0.03466797,-0.035827637,0.012069702,-0.0027599335,-0.0033168793,-0.010231018,-0.01058197,-0.011924744,-0.0071868896,-0.01777649,0.0054473877,-0.0003774166,0.048034668,0.020843506,0.04272461,0.044067383,0.021377563,0.010932922,-0.036346436,-0.028747559,0.009536743,-0.018341064,0.023895264,-0.017593384,0.04586792,0.041259766,-0.0071029663,0.040283203,0.030197144,0.029708862,0.0032653809,0.010322571,-0.019515991,0.01612854,-0.009468079,0.018081665,0.0044021606,0.040130615,-0.02558899,0.023284912,0.012237549,0.0181427,-0.026260376,0.037597656,0.07678223,0.0259552,-0.015129089,0.033569336,-0.0005354881,-0.01386261,-0.0062408447,-0.028442383,0.046783447,0.0051956177,0.045532227,0.050964355,0.014640808,-0.00554657,0.03253174,-0.027420044,-0.027542114,0.060058594,0.030410767,-0.015899658,-0.0073928833,-0.010978699,0.013549805,-0.048706055,-0.027938843,0.016571045,-0.005256653,0.005947113,-0.0053749084,-0.005214691,-0.012649536,0.021392822,0.020431519,0.012718201,0.0028209686,0.02482605,0.036224365,0.0025234222,0.02041626,-0.0047950745,0.025726318,-0.022720337,-0.014091492,0.023834229,0.024871826,-0.011688232,-0.0050849915,0.030273438,0.004917145,0.04220581,0.043304443,-0.022079468,0.009147644,0.030090332,0.012336731,0.001282692,0.04989624,0.040740967,0.014465332,0.03982544,0.034851074,0.027114868,-0.033050537,0.020858765,-0.002380371,-0.0020313263,-0.012557983,-0.011146545,0.0019397736,-0.014045715,0.031341553,0.005428314,-0.019180298,0.017074585,0.029144287,-0.002855301,-0.011138916,-0.00806427,0.017654419,-0.025863647,-0.0048980713,0.015380859,-0.017669678,0.04156494,0.008796692,0.023239136,-0.030975342,0.016830444,-0.0039367676,-0.013069153,-0.001750946,0.02822876,-0.040252686,-0.0027198792,-0.006664276,0.003917694,-0.058288574,0.0017595291,0.021057129,-0.008857727,0.017990112,0.0082473755,-0.002527237,-0.0059547424,0.025527954,0.008674622,-0.012237549,-0.024505615,-0.025360107,0.03277588,0.03930664,0.0056533813,0.012252808,-0.01979065,-0.008010864,0.008781433,-0.0021457672,-0.0052757263,-0.010177612,-0.016296387,-0.023422241,0.023483276,0.038238525,0.01574707,0.04940796,-0.011138916,-0.013572693,0.014923096,0.028305054,0.004776001,-0.0063056946,-0.0058555603,0.021148682,-0.020004272,0.055664062,0.03878784,0.00554657,0.03881836,-0.008384705,-0.01676941,0.012031555,-0.012023926,0.027282715,-0.014518738,0.0010566711,-0.006942749,0.033172607,-0.015167236,-0.034240723,0.010223389,-0.019805908,-0.016052246,-0.011253357,0.006793976,0.0013561249,0.027770996,0.039154053,0.020126343,-0.017120361,0.06585693,-0.016174316,0.038269043,-0.0016040802,-0.012672424,0.049713135,0.021820068,0.04248047,0.01411438,0.018035889,-0.0385437,0.02331543,0.030654907,0.025283813,0.008003235,0.00007522106,-0.010375977,0.035980225,-0.0013999939,0.03012085,-0.010681152,0.0048103333,0.015991211,-0.0042915344,-0.0061683655,-0.0066108704,-0.0040626526,0.006061554,0.048095703,-0.029693604,-0.0008239746,-0.02709961,-0.011947632,0.024612427,-0.014640808,-0.0025100708,-0.010848999,-0.018920898,0.019134521,-0.033935547,-0.017608643,0.01713562,0.025497437,-0.049438477,-0.014328003,0.009536743,0.02154541,-0.023239136,0.023773193,0.013511658,0.0072517395,0.006362915,0.041503906,-0.008270264,0.031707764,-0.013938904,0.030029297,0.027954102,0.009162903,-0.026016235,0.0026798248,0.008766174,-0.010917664,0.015220642,0.042816162,-0.020233154,0.0049934387,-0.011360168,-0.01360321,0.00044369698,0.0025119781,-0.0126571655,0.006969452,-0.013557434,-0.01574707,0.007896423,0.014022827,-0.0056266785,0.0017108917,-0.002117157,-0.013168335,0.012718201,0.03857422,0.01626587,-0.03137207,-0.009529114,-0.0016937256,0.011932373,-0.018798828,-0.018188477,-0.010322571,-0.033935547,0.0082092285,0.0069885254,0.011619568,0.010322571,-0.021484375,-0.002544403,0.024917603,-0.00029563904,0.010322571,0.003107071,-0.006088257,0.013916016,-0.0042686462,-0.0032787323,-0.0109939575,-0.0046844482,0.016540527,0.01739502,-0.008842468,-0.034240723,0.019363403,-0.008346558,0.021697998,0.0075645447,-0.017791748,0.013847351,-0.020507812,-0.0042877197,-0.0018472672,0.017684937,-0.008911133,-0.0065574646,-0.009284973,0.031341553,0.053894043,-0.0056877136,-0.0047035217,0.0231781,0.018966675,0.022750854,0.043701172,0.013801575,0.03918457,0.03253174,-0.017822266,-0.02230835,0.02482605,-0.009521484,-0.031066895,0.013145447,-0.0011806488,-0.017410278,0.027877808,0.012329102,0.004837036,-0.037841797,-0.016967773,-0.009216309,-0.014671326,0.011276245,-0.018066406,0.010177612,-0.0231781,-0.013656616,0.006099701,-0.031188965,-0.047302246,-0.023742676,0.005340576,-0.013168335,-0.048309326,0.004108429,-0.031585693,0.0058174133,-0.018920898,-0.0033988953,-0.008476257,0.028060913,-0.013572693,-0.01449585,-0.00088119507,0.026748657,0.019332886,0.015434265,0.02293396,-0.021850586,-0.021194458,-0.03869629,0.010406494,-0.017501831,0.019104004,-0.0041007996,0.0289917,0.02444458,-0.019592285,-0.0035591125,-0.013435364,-0.0012311935,-0.017074585,-0.018096924,-0.019165039,0.018722534,0.01486969,-0.00655365,-0.009780884,0.04067993,-0.028182983,-0.011299133,0.026519775,0.039978027,0.0027122498,0.02558899,-0.023208618,-0.0021781921,-0.016464233,-0.0031318665,-0.016113281,0.0034713745,0.0131073,0.013954163,0.002456665,0.003282547,0.0234375,-0.013282776,0.0049591064,0.024154663,-0.0028457642,-0.007247925,0.03756714,0.007583618,0.0015010834,-0.016921997,-0.013832092,0.02760315,0.03829956,0.020004272,0.00049495697,-0.020370483,0.0023994446,-0.01725769,0.018661499,0.012611389,-0.025466919,-0.037841797,-0.02003479,-0.032928467,0.025634766,-0.0015201569,0.012504578,-0.0056381226,0.019485474,-0.015960693,-0.018432617,-0.029708862,0.030029297,0.015777588,-0.016281128,-0.009101868,0.011856079,0.016784668,-0.036468506,-0.0030288696,-0.040405273,-0.0357666,-0.009918213,-0.017288208,0.02029419,0.00894165,-0.0023841858,-0.0020751953,-0.0015363693,-0.0018253326,0.009643555,0.0155181885,-0.021377563,-0.00737381,0.027145386,0.015731812,-0.023757935,0.031402588,-0.014450073,0.00687027,0.008644104,-0.01235199,0.018997192,-0.022979736,0.024719238,-0.001906395,-0.0079574585,0.037506104,-0.0008111,0.008956909,-0.03253174,-0.00018143654,0.0025959015,-0.0068359375,0.0496521,-0.020614624,-0.021499634,0.0143585205,-0.028182983,-0.026565552,0.004463196,0.022415161,0.026245117,-0.001414299,0.05105591,-0.005569458,-0.010688782,0.01914978,0.015167236,-0.008293152,-0.0029773712,0.03363037,0.0019760132,0.006996155,-0.0021839142,-0.011123657,-0.02960205,-0.0068626404,0.01991272,-0.005634308,-0.010002136,0.025650024,0.02041626,0.04815674,-0.010528564,0.028060913,0.010231018,0.0020179749,0.026931763,-0.0052490234,0.04626465,-0.015007019,-0.029464722,0.0061912537,0.001083374,-0.029388428,0.011199951,-0.002702713,0.000089883804,-0.037139893,0.022384644,-0.00035190582,0.024810791,-0.016601562,0.015625,-0.025939941,-0.020080566,-0.032043457,-0.008705139,-0.025726318,0.001083374,0.033203125,0.013763428,0.027252197,0.0039634705,-0.028961182,0.015434265,0.048736572,0.0052223206,-0.019012451,-0.014961243,0.01600647,0.0045280457,0.0093688965,0.009147644,-0.015808105,-0.019622803,0.0004887581,-0.0074157715,0.0075569153,-0.0033245087,0.015716553,0.0042533875,-0.0060539246,-0.006038666,0.030059814,-0.00055503845,-0.0045318604,0.012382507,0.0051078796,0.032318115,0.021331787,-0.009346008,0.01637268,0.0113220215,-0.046325684,0.06854248,0.0011062622,0.030014038,-0.020309448,0.012451172,-0.03314209,-0.029312134,-0.010719299,0.010032654],"createdAt":"2026-04-18T19:26:48.435Z","updatedAt":"2026-04-23T00:32:28.039Z","lastSeenAt":"2026-04-23T00:32:28.039Z","tsv":"'/api/v1/transactions/44':85,194 '/request':13,28 '0.02':12,27,62,111 '000':100 '0x8335':105 '20':99 '2913':106 '300':126 '402':94 '6':115 'accept':131 'access':90,202 'across':45 'actual':182 'advertis':140 'ai':48 'analysi':144 'analyt':47 'api':5,20,37,74,89,167,201 'application/json':136 'base':8,23,70,101,108 'base network api' 'base-network' 'behind':184 'broader':138 'call':4,19 'categori':56 'challeng':95 'classif':147 'commit':79 'connect':173 'content':179 'convers':159 'crypto payment api' 'data':46,212 'decim':116 'describ':210 'doc':165 'document':163,209 'embed':148 'enabl':36 'endpoint':44,58,83,130,141,186,195 'equal':110 'estim':156 'exact':122 'exchang':151 'expect':219 'feed':150 'financ':51 'function':183 'gas':155 'generat':161 'generic':204 'geocod':157 'given':112 'howev':162 'infrastructur':54 'input':217 'json-response' 'key':75 'label':87 'learn':50 'limit':77 'low payment fee' 'lowpaymentfee.com':31 'machin':49 'micropayment api' 'name':199 'network':9,24,71 'no-api-key' 'offer':40 'page':164 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payabl':65 'payment':117 'per':3,18,63 'platform':6,21,38,139 'post':132 'post-method' 'premium':88,200 'price':60,149,166 'prompt':175 'purpos':191 'quot':154 'rate':76,152 'readm':168 'request':64,96,133 'requir':80 'return':92,135,170,214 'schema':207 'scheme':123 'second':127 'sentiment':143 'specif':82,190 'substant':178 'summar':146 'text':145 'timeout':128 'token':153 'unclear':197 'unit':102 'unverifi':188 'usdc':15,30,67,104,113 'usdc api' 'usdc-settlement' 'util':55 'valid':158 'varieti':42 'via':10,25,119 'wallet':174 'web3':52 'x402':11,26,35,121 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"76880760-15fd-4694-b0e7-74fa12252d39","listingId":"02ac356d-a25c-4fcd-9d60-4ee3d4fea3ca","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/44","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:48.435Z"}],"sources":[{"listingId":"02ac356d-a25c-4fcd-9d60-4ee3d4fea3ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/44","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:48.435Z","lastSeenAt":"2026-04-23T00:32:28.039Z"}],"details":{"listingId":"02ac356d-a25c-4fcd-9d60-4ee3d4fea3ca","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/44 \\\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, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/44"},{"claim":"Payment scheme is 'exact' with 300-second timeout, payTo address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/transactions/44"}],"useCases":["Programmatic access to various data, AI, and utility APIs without traditional API key management","Agent-driven workflows that need low-friction per-call payment via crypto","Accessing financial data feeds or AI inference endpoints with USDC micropayments"],"bestFor":["Developers or agents wanting zero-signup, pay-per-use API access","Crypto-native applications that can settle payments on Base in USDC","Prototyping or low-volume use cases where $0.02/call is cost-effective"],"notFor":["High-volume production workloads where per-call crypto settlement adds overhead","Users without a Base-compatible wallet or USDC holdings","Anyone needing detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:36.879Z"},"updatedAt":"2026-04-23T00:32:28.039Z"}}