{"id":"266b0224-bee6-4ea1-b497-abe095fbf40d","shortId":"REA8sc","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/230` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live, requiring up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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 are priced at $0.02 per request. However, the specific endpoint probed here (`/api/v1/payments/230`) is simply described as \"Premium API Access\" with no further documentation on what data or functionality it returns.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the endpoint actually returns. The platform concept is clear, but the specific behavior of this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-marketplace","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format for this endpoint.","The endpoint name 'Premium API Access' is generic; actual functionality is unknown.","Cannot verify what data or service is returned after payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/230","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/230","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 zero documentation on what this endpoint actually does or returns. No OpenAPI spec, no request/response schemas, no examples. The /docs and other pages are empty. The endpoint title 'Premium API Access' is generic and uninformative.","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":"2026-04-19T06:48:12.741Z","embedding":[-0.026275635,-0.03189087,0.034484863,0.017211914,0.0076141357,-0.032684326,-0.025131226,0.026947021,0.07928467,-0.060180664,0.024154663,-0.048736572,-0.04220581,-0.030563354,-0.026245117,0.005420685,-0.004638672,0.00094366074,-0.029525757,0.024398804,0.029342651,-0.009521484,-0.037597656,0.03857422,-0.00046539307,-0.017807007,-0.014404297,-0.008834839,-0.011299133,-0.040771484,0.04748535,-0.032073975,-0.008277893,0.0067443848,-0.016525269,-0.016906738,0.0028247833,0.030181885,0.028182983,-0.004573822,-0.0064926147,-0.05722046,-0.00053596497,-0.014350891,-0.059783936,0.000541687,0.0028247833,-0.020767212,0.003282547,0.00365448,-0.035827637,-0.010932922,-0.014915466,0.0151901245,0.007408142,0.012832642,-0.0031394958,-0.009727478,0.0061798096,0.01751709,-0.0060539246,-0.05407715,-0.017623901,-0.008110046,0.0074768066,0.05230713,-0.00881958,0.042938232,0.01007843,0.06335449,0.041900635,0.048095703,0.02760315,0.014274597,-0.0054893494,-0.008117676,0.004386902,0.059570312,-0.008232117,-0.020095825,-0.014541626,-0.0095825195,-0.052764893,0.0044441223,-0.022705078,-0.04156494,-0.024810791,0.01576233,-0.013366699,0.025848389,-0.07543945,0.0022029877,-0.009635925,0.004852295,0.0028896332,-0.010375977,-0.012748718,0.024887085,-0.007217407,0.018676758,-0.004081726,-0.041656494,0.018981934,0.0064582825,0.03967285,0.04852295,0.022781372,0.024414062,0.008605957,-0.010627747,-0.030075073,0.018676758,-0.010475159,-0.000062942505,0.00554657,0.012084961,-0.014770508,0.008666992,-0.021469116,0.022827148,-0.050811768,0.052246094,0.008644104,0.0011634827,0.010101318,-0.04953003,-0.013908386,0.019973755,-0.023162842,0.0036735535,0.016113281,0.013412476,0.023162842,-0.017028809,-0.037841797,0.017120361,-0.024887085,-0.012802124,-0.054229736,-0.032440186,0.04095459,-0.029418945,0.015365601,0.034973145,-0.10064697,-0.012191772,-0.036743164,0.011680603,-0.036468506,-0.010818481,-0.00083208084,0.030593872,-0.011940002,-0.014633179,-0.029937744,-0.02267456,0.00071287155,0.035583496,-0.009651184,0.047576904,-0.019119263,0.020935059,0.017333984,0.010406494,0.019302368,0.022094727,-0.002620697,-0.08312988,-0.08642578,-0.018707275,-0.0045661926,-0.011444092,-0.027374268,0.014732361,-0.0021095276,-0.06549072,-0.01928711,-0.021362305,0.0023288727,-0.052093506,-0.0034713745,-0.026626587,0.016998291,-0.006275177,-0.070617676,-0.028579712,-0.027297974,0.058685303,0.030044556,0.02078247,0.027267456,-0.015899658,0.0597229,0.020095825,-0.01574707,-0.019561768,0.021331787,-0.023986816,0.022140503,-0.010299683,0.011856079,-0.03375244,0.04019165,0.072265625,0.018875122,-0.020629883,-0.0066833496,-0.06665039,-0.05065918,-0.03704834,0.020935059,0.007701874,-0.0032348633,0.03378296,-0.03152466,-0.03302002,0.0055770874,0.014030457,0.016967773,0.062042236,0.020446777,-0.0063476562,0.028335571,0.024795532,-0.0513916,0.044708252,0.036254883,0.023727417,-0.025283813,-0.026611328,0.02456665,0.04397583,-0.026229858,0.019515991,-0.011940002,0.025100708,-0.011871338,0.00072956085,0.016967773,-0.01586914,-0.015792847,-0.024261475,-0.024459839,0.024276733,0.014839172,-0.029937744,-0.034210205,-0.074645996,0.04827881,0.028152466,0.047027588,-0.0029754639,0.006313324,-0.018600464,-0.016967773,-0.07739258,0.056640625,0.0758667,-0.009422302,-0.011581421,0.021194458,-0.0121536255,-0.03753662,0.008834839,-0.013504028,-0.026763916,-0.02255249,0.009544373,-0.039764404,-0.0066452026,0.019592285,0.02758789,0.05001831,-0.00048661232,-0.050354004,-0.02192688,-0.00541687,0.00006300211,-0.029785156,0.00039458275,-0.006969452,0.0138168335,0.018936157,0.004714966,0.014091492,-0.00242424,-0.0021095276,-0.004009247,0.002073288,-0.007335663,-0.02482605,0.015670776,0.0031757355,-0.056640625,0.003791809,-0.004009247,0.07537842,-0.054107666,0.036224365,-0.011947632,0.010223389,0.05444336,-0.0030460358,-0.050964355,0.0063667297,0.030075073,0.013168335,0.052459717,0.009399414,-0.035095215,-0.014274597,0.07171631,-0.0024356842,-0.0037593842,0.007686615,0.020828247,0.03930664,-0.0067443848,-0.06774902,-0.03805542,-0.007980347,-0.031707764,0.02432251,-0.023986816,0.028884888,-0.020111084,0.0047569275,-0.021148682,-0.0044517517,-0.027038574,0.007865906,-0.013793945,0.009559631,-0.024337769,-0.013870239,0.017425537,0.008850098,-0.0050735474,0.013259888,0.045043945,0.022567749,-0.00724411,-0.024337769,-0.026748657,-0.009963989,-0.0018339157,0.017105103,0.017990112,0.026428223,0.057891846,-0.040771484,0.004547119,0.029907227,0.019760132,0.033599854,-0.0035037994,0.0031986237,-0.06536865,-0.056488037,-0.031829834,-0.03930664,0.032806396,0.0001705885,-0.010612488,0.0546875,0.0071907043,-0.019836426,-0.044708252,0.024765015,-0.04269409,-0.010528564,0.04650879,-0.018463135,-0.021881104,0.011878967,-0.015167236,0.003704071,0.035705566,0.017807007,0.030258179,0.066833496,0.04345703,0.010612488,0.017410278,0.0051231384,0.030548096,0.0047035217,-0.029388428,-0.025650024,-0.018539429,0.0289917,-0.025543213,-0.020980835,-0.0690918,0.05569458,0.043121338,0.08898926,0.01890564,0.0043945312,0.037384033,-0.020599365,0.01600647,-0.024414062,-0.018615723,-0.026306152,-0.05279541,0.03387451,-0.015403748,-0.006126404,-0.019073486,0.03640747,-0.0052604675,0.01889038,-0.023788452,0.05041504,-0.01033783,-0.008514404,0.018722534,0.018798828,0.055419922,0.06719971,-0.042144775,0.025894165,0.020614624,-0.024154663,0.0062065125,0.033325195,-0.015853882,-0.0035076141,-0.054107666,-0.027236938,-0.006137848,-0.003944397,-0.05279541,0.008621216,0.0079193115,0.016693115,0.021835327,-0.011062622,-0.014091492,0.0032348633,-0.013343811,-0.050750732,-0.0048980713,-0.039154053,-0.0007224083,0.0390625,-0.023986816,-0.0034446716,0.0018157959,-0.0046806335,0.0021591187,0.019943237,0.026763916,-0.001364708,-0.053588867,0.028244019,0.017623901,0.003332138,0.009086609,0.030181885,0.019058228,0.03213501,0.05307007,0.021575928,-0.018157959,-0.06604004,0.021911621,-0.050811768,0.0018663406,0.018188477,-0.026184082,0.0062294006,-0.016815186,-0.026290894,-0.033599854,0.012168884,-0.031463623,0.0049095154,0.025466919,-0.016662598,-0.027557373,-0.055999756,-0.031341553,0.002456665,0.06707764,0.015556335,0.011749268,-0.062683105,-0.00020051003,0.018325806,0.006706238,0.032714844,-0.014656067,-0.011230469,-0.025650024,-0.03164673,-0.011268616,-0.020553589,0.024139404,-0.00699234,-0.0054740906,0.027954102,0.012619019,0.025650024,0.0033454895,0.014678955,0.024307251,-0.026687622,-0.003929138,-0.0113220215,0.04660034,0.009346008,-0.005531311,-0.055847168,0.039489746,0.010749817,0.03451538,-0.044158936,-0.003522873,-0.005832672,0.006752014,0.0152282715,-0.0013437271,-0.0045051575,-0.011169434,-0.046783447,-0.056854248,0.04095459,-0.019622803,0.020248413,0.0287323,0.0047950745,0.021194458,-0.0036811829,-0.008239746,0.011169434,-0.02079773,-0.0054893494,-0.023330688,-0.027114868,-0.021133423,-0.015022278,-0.026473999,0.025024414,-0.019744873,0.016998291,0.009506226,-0.019042969,0.02748108,-0.0042495728,-0.004055023,0.013504028,0.0012454987,0.021087646,0.039001465,0.0053977966,-0.041015625,0.023376465,0.0054244995,0.010612488,-0.0007209778,0.042022705,0.026306152,0.0015525818,-0.0026550293,-0.0116119385,-0.022140503,-0.026031494,0.00598526,0.009628296,0.0085372925,-0.006034851,-0.043518066,0.020858765,0.010917664,-0.03829956,-0.027816772,0.011894226,0.012954712,-0.035614014,0.018112183,0.02935791,0.0552063,-0.02180481,-0.0042648315,0.0025138855,0.02279663,0.036315918,0.016799927,-0.007801056,0.014434814,-0.01612854,0.011764526,-0.0017204285,-0.019485474,0.022323608,0.0033397675,0.022140503,0.019470215,0.008422852,-0.022949219,-0.02734375,0.0026817322,-0.015151978,-0.028503418,0.020141602,0.017608643,0.034088135,-0.030700684,0.016555786,0.021270752,-0.021514893,-0.017028809,-0.011024475,0.03741455,-0.019241333,-0.010749817,0.015914917,0.018630981,0.0362854,-0.060180664,0.00023472309,0.0030498505,0.020751953,-0.02558899,-0.041137695,-0.03857422,0.009002686,0.040771484,0.013381958,0.024291992,0.035614014,0.00655365,0.0077552795,0.029083252,-0.0026226044,-0.012550354,-0.015312195,-0.04562378,-0.019546509,-0.01586914,-0.000477314,-0.02748108,0.009361267,0.00009286404,-0.030563354,0.0073623657,-0.012863159,-0.0024204254,-0.003408432,0.009757996,0.040924072,-0.00014698505,0.01676941,-0.018478394,-0.03805542,0.0028839111,0.0031375885,0.0184021,-0.050567627,0.012283325,-0.016784668,-0.0053596497,-0.0016384125,0.007209778,0.02029419,0.026428223,0.01222229,0.03527832,-0.04147339,0.04837036,-0.040924072,0.010101318,0.0069999695,-0.03692627,-0.012504578,-0.02607727,-0.015296936,0.042266846,-0.026489258,-0.0061798096,-0.034820557,-0.041107178,-0.016448975,-0.055847168,0.018569946,0.03793335,0.03616333,-0.028503418,-0.0017633438,-0.0024986267,0.0036773682,-0.016677856,0.007282257,-0.01637268,0.026000977,0.02180481,0.009315491,-0.03692627,-0.03152466,-0.028442383,-0.00083971024,-0.043273926,-0.04751587,-0.0093307495,0.0032196045,-0.009765625,-0.014877319,-0.025161743,-0.0335083,-0.002412796,-0.04058838,0.0066184998,0.009277344,0.020721436,0.006462097,-0.027114868,-0.004966736,0.017562866,-0.0127334595,0.039245605,0.0059776306,-0.009674072,-0.041107178,0.005138397,0.021026611,0.020965576,-0.004447937,-0.0124435425,-0.002948761,-0.02104187,-0.05569458,-0.005783081,-0.0069236755,-0.00982666,-0.0132751465,0.00058555603,-0.05001831,-0.00020766258,-0.016693115,0.005519867,0.025848389,0.00894165,0.016540527,0.0018224716,0.0138549805,-0.002166748,-0.009399414,-0.029632568,0.019699097,0.0107421875,0.004096985,0.028793335,0.044921875,0.007850647,-0.026000977,0.014472961,0.0016555786,0.018371582,-0.017364502,0.010383606,-0.017150879,0.010299683,-0.0062789917,-0.011871338,-0.037628174,-0.0015039444,0.09118652,-0.0032691956,-0.009605408,-0.0143966675,-0.022155762,0.019500732,0.032592773,-0.036712646,-0.0067825317,-0.0259552,0.022613525,-0.028808594,0.008834839,0.0034255981,0.02532959,-0.017440796,-0.05291748,-0.023269653,-0.0067977905,-0.009689331,-0.061920166,-0.028579712,-0.07336426,0.000487566,-0.01058197,-0.018478394,0.00022614002,0.013206482,-0.021774292,-0.078308105,-0.0027809143,0.04724121,0.009735107,0.025054932,-0.008125305,0.024154663,0.020523071,-0.03652954,-0.0022659302,0.03262329,-0.029830933,-0.015296936,-0.026611328,0.014854431,-0.018569946,-0.014732361,0.008895874,0.0135650635,0.016418457,-0.01576233,0.0018920898,-0.008926392,0.0151901245,-0.019317627,0.012893677,-0.010391235,-0.018310547,0.03503418,-0.047576904,0.029281616,0.009498596,-0.008255005,0.0051727295,0.03189087,0.04095459,-0.036071777,-0.013427734,0.020843506,0.01689148,0.03677368,-0.01979065,0.04095459,0.0077400208,-0.015274048,0.009178162,-0.0046691895,-0.015258789,-0.034118652,-0.025375366,0.019470215,-0.00333786,0.015388489,-0.016235352,0.0015029907,0.011695862,-0.0006108284,0.014762878,-0.009887695,-0.021591187,-0.02204895,-0.0023403168,0.004032135,0.007511139,-0.0062294006,0.029724121,0.02960205,0.031921387,0.013031006,-0.015655518,0.004508972,0.03225708,-0.0061950684,0.00061511993,0.022323608,0.0011892319,0.0178833,0.024124146,0.011421204,-0.046966553,-0.015602112,-0.023635864,-0.016418457,-0.002779007,-0.004787445,-0.010810852,-0.0063934326,0.0009918213,-0.0029144287,-0.031143188,0.0056877136,-0.022628784,-0.027053833,-0.003194809,-0.01890564,0.020950317,0.0038776398,0.008369446,0.008506775,-0.0041007996,0.040527344,-0.0022850037,-0.014579773,0.026306152,0.031799316,0.012069702,-0.03012085,-0.0075683594,-0.018173218,-0.008651733,-0.00005596876,-0.035339355,0.008125305,0.044921875,-0.014564514,0.0032653809,0.008918762,0.024963379,-0.0034999847,0.0070724487,-0.009674072,0.021850586,-0.0050086975,0.0309906,-0.04916382,0.017440796,0.012084961,0.008041382,-0.009857178,-0.006275177,-0.024597168,0.015853882,0.0071258545,-0.011154175,0.05517578,0.008781433,0.024505615,-0.026687622,-0.02482605,0.005329132,-0.030303955,-0.020111084,0.025421143,-0.0062789917,0.000104248524,0.011352539,-0.02394104,0.032318115,-0.037109375,0.020599365,0.003768921,0.0018205643,-0.00003927946,-0.023529053,-0.0022525787,-0.017440796,-0.01889038,0.008895874,-0.0017309189,0.049957275,0.021942139,0.031341553,0.05355835,0.018478394,-0.0037136078,-0.03503418,-0.031585693,0.0027446747,-0.017974854,0.014030457,-0.014694214,0.060455322,0.037078857,0.0049362183,0.043182373,0.03302002,0.035888672,0.005718231,0.0048332214,-0.01285553,0.017440796,0.001786232,0.028030396,-0.008529663,0.035339355,-0.03765869,0.031280518,0.013893127,0.034301758,-0.030914307,0.033294678,0.0713501,0.016143799,-0.018127441,0.043426514,-0.008399963,-0.009216309,-0.011421204,-0.013336182,0.050964355,0.003932953,0.054840088,0.050079346,0.0131073,0.00046157837,0.017227173,-0.022918701,-0.020828247,0.06286621,0.021957397,-0.020614624,-0.012519836,-0.0019702911,0.009750366,-0.04940796,-0.028244019,0.020111084,-0.010437012,0.0072631836,-0.0005364418,-0.00730896,-0.014984131,0.0064964294,0.020477295,0.013435364,-0.015098572,0.022613525,0.0385437,-0.0042419434,0.02722168,-0.008964539,0.025054932,-0.0309906,-0.023040771,0.018707275,0.0206604,-0.011398315,-0.00969696,0.02128601,0.005504608,0.042053223,0.043182373,-0.022140503,0.0072364807,0.02810669,0.009269714,-0.006210327,0.060668945,0.039855957,0.014579773,0.04248047,0.023757935,0.031677246,-0.04647827,0.022857666,0.002292633,0.009254456,-0.011894226,-0.008659363,0.0060424805,-0.015037537,0.019332886,0.00074100494,-0.013977051,0.026473999,0.024871826,-0.0075683594,-0.0045776367,-0.006790161,0.007537842,-0.025390625,-0.010223389,0.0072631836,-0.012710571,0.04232788,0.013908386,0.025802612,-0.022659302,0.027557373,0.00065135956,-0.017211914,0.004047394,0.023223877,-0.030563354,0.0013256073,-0.0043792725,-0.0014743805,-0.051361084,0.011207581,0.026931763,-0.01638794,0.028579712,0.012878418,0.0002913475,0.00025320053,0.029632568,0.012184143,0.0014696121,-0.007118225,-0.023269653,0.03353882,0.044525146,-0.004886627,-0.0049324036,-0.028259277,-0.0042877197,0.011253357,-0.008453369,-0.0023288727,-0.008598328,-0.022033691,-0.027954102,0.018417358,0.03579712,0.02217102,0.055267334,-0.02168274,-0.016189575,0.008766174,0.038909912,0.00017762184,-0.0021743774,-0.0020256042,0.019882202,-0.02217102,0.051513672,0.026535034,0.010147095,0.03567505,-0.0021648407,-0.021102905,0.008972168,-0.010147095,0.02268982,-0.015426636,0.0010786057,-0.0033664703,0.020446777,-0.015022278,-0.04348755,0.012138367,-0.01398468,-0.024368286,-0.01828003,0.014381409,0.007675171,0.034118652,0.033447266,0.019561768,-0.020690918,0.06323242,-0.008911133,0.048553467,0.0019989014,-0.013908386,0.05206299,0.019302368,0.03363037,0.015899658,0.018966675,-0.033966064,0.026565552,0.035003662,0.025756836,0.011184692,-0.0036468506,-0.016296387,0.03942871,0.0021343231,0.026062012,-0.009132385,0.0042152405,0.01878357,0.0037059784,-0.010421753,-0.007850647,-0.010292053,0.00655365,0.046813965,-0.03375244,-0.015655518,-0.021591187,-0.012321472,0.027709961,-0.020095825,0.010391235,0.010688782,-0.022979736,0.010063171,-0.024917603,-0.029830933,0.000620842,0.024475098,-0.047790527,-0.013595581,0.00005143881,0.011764526,-0.021133423,0.03286743,0.021560669,-0.0007786751,0.014183044,0.050567627,-0.0045318604,0.030670166,-0.0152282715,0.02104187,0.031951904,0.007255554,-0.021133423,-0.0017433167,0.011039734,-0.013519287,0.014801025,0.036712646,-0.012084961,0.005050659,-0.00724411,-0.0065078735,0.002664566,0.008621216,-0.009025574,0.0076141357,-0.016296387,-0.014343262,-0.0016489029,0.008201599,-0.0024356842,0.004837036,-0.0064430237,-0.015060425,0.0074768066,0.03817749,0.01890564,-0.039093018,-0.0016155243,0.0067596436,0.009727478,-0.02458191,-0.008621216,-0.004837036,-0.03744507,0.016937256,0.015464783,0.012306213,0.013290405,-0.027160645,0.0033988953,0.026947021,0.017913818,0.019943237,0.005672455,0.0042304993,0.01222229,-0.0073928833,0.0011301041,-0.0031719208,-0.010871887,0.010528564,0.021957397,0.00011020899,-0.03125,0.023086548,0.0006661415,0.01751709,0.0009059906,-0.017593384,0.014251709,-0.0074005127,-0.0019283295,0.0036640167,0.012687683,-0.011299133,-0.012535095,-0.014892578,0.037994385,0.053344727,-0.015182495,-0.013435364,0.02519226,0.014633179,0.017990112,0.030151367,0.00019168854,0.042144775,0.021728516,-0.022644043,-0.027160645,0.020019531,-0.012641907,-0.0236969,0.019989014,-0.018997192,-0.021148682,0.0135269165,0.010169983,-0.0029182434,-0.030517578,-0.0071525574,-0.0067825317,-0.017822266,0.01789856,-0.00894928,0.011650085,-0.029785156,-0.013191223,0.010116577,-0.024963379,-0.047790527,-0.022903442,-0.0017652512,-0.011077881,-0.05255127,0.010101318,-0.024917603,0.0107803345,-0.032043457,0.0011539459,-0.011169434,0.01586914,-0.012809753,-0.006591797,0.0073013306,0.026473999,0.025619507,0.0027809143,0.022857666,-0.035827637,-0.025466919,-0.023040771,0.011131287,-0.014732361,0.019927979,0.0025844574,0.035095215,0.024124146,-0.012184143,-0.004058838,-0.014381409,-0.0023956299,-0.016204834,-0.018249512,-0.02508545,0.028503418,0.012199402,-0.01084137,-0.009933472,0.04043579,-0.02986145,-0.018096924,0.032043457,0.044281006,0.011131287,0.026046753,-0.014053345,-0.0015068054,-0.016113281,0.0010557175,-0.015350342,0.004764557,0.0076560974,0.0052604675,-0.009750366,0.0045280457,0.024780273,-0.012413025,-0.008346558,0.0357666,0.0038661957,-0.005832672,0.03463745,0.010749817,0.011070251,-0.00982666,-0.0071525574,0.021133423,0.042938232,0.009109497,0.0010461807,-0.003929138,0.004951477,-0.017822266,0.011734009,0.016418457,-0.020690918,-0.04473877,-0.012252808,-0.031341553,0.017669678,-0.004245758,0.012062073,-0.010269165,0.016967773,-0.01687622,-0.02897644,-0.016296387,0.028884888,0.012077332,-0.013618469,-0.0128479,0.01474762,0.009506226,-0.035980225,0.0013141632,-0.04385376,-0.03652954,-0.007686615,-0.026626587,0.027526855,0.013687134,-0.0067596436,-0.0026245117,-0.005592346,-0.0030460358,0.0015153885,0.025650024,-0.008308411,-0.0051994324,0.03387451,0.019302368,-0.018630981,0.016830444,-0.014709473,-0.0018110275,0.013763428,-0.008483887,0.009559631,-0.016967773,0.027633667,-0.011703491,-0.0075912476,0.025146484,-0.0074272156,0.012290955,-0.03475952,0.0066070557,-0.004333496,-0.010940552,0.030914307,-0.03414917,-0.019454956,0.010299683,-0.022338867,-0.022598267,0.005607605,0.018447876,0.039367676,-0.014671326,0.04144287,-0.01612854,-0.0067329407,0.02444458,0.008346558,-0.012992859,0.007537842,0.027008057,0.002073288,-0.011245728,-0.004283905,-0.01449585,-0.031143188,-0.008872986,0.017684937,-0.008239746,-0.011856079,0.023345947,0.0138168335,0.043304443,-0.0045776367,0.01763916,0.009094238,0.006340027,0.025466919,0.0038471222,0.06689453,0.00024938583,-0.027160645,0.0053863525,0.0033664703,-0.029647827,-0.001958847,-0.008811951,0.00059890747,-0.042236328,0.0107421875,-0.0064315796,0.02142334,-0.018707275,0.013015747,-0.024215698,-0.005958557,-0.04336548,-0.008964539,-0.028808594,0.0141067505,0.028762817,0.0008740425,0.023376465,0.0018529892,-0.02168274,0.018356323,0.045440674,-0.013336182,-0.026550293,-0.01576233,0.00687027,-0.007446289,0.016616821,-0.0014257431,-0.02267456,-0.015403748,0.00030636787,-0.020812988,0.005176544,-0.007484436,0.018051147,0.0037956238,-0.0021247864,-0.0047569275,0.023590088,-0.004875183,-0.0061912537,0.01436615,0.006549835,0.036254883,0.032196045,-0.014274597,0.020202637,0.021316528,-0.042053223,0.055786133,0.00070905685,0.02708435,-0.02079773,-0.0002259016,-0.035491943,-0.019577026,-0.022415161,0.0004911423],"createdAt":"2026-04-18T18:50:00.233Z","updatedAt":"2026-04-22T23:01:42.777Z","lastSeenAt":"2026-04-22T23:01:42.777Z","tsv":"'/api':201 '/api/v1/payments/230':57,176 '/docs':200 '/pricing':202 '/readme':204 '/request':13,28 '0.02':12,27,89,167 '000':78 '0x8335':83 '20':77 '2913':84 '6':94 'Base network API' 'USDC micropayment API' 'accept':46,64 'access':62,183 'actual':233 'advertis':123 'ai':135 'analysi':139 'analyt':129 'api':5,20,38,61,97,125,182 'attach':108 'base':8,23,51,79,86 'behavior':243 'broader':121 'call':4,19,91 'caller':106 'categori':126 'challeng':69 'classif':142 'clear':239 'commit':103 'concept':237 'confirm':70 'connect':210 'content':216 'convers':159 'crypto-paid API' 'data':128,132,190 'decim':95 'describ':179 'document':187,195,225 'embed':143 'endpoint':55,163,173,232,246 'equal':88 'estim':153 'exampl':228 'exchang':148 'export':133 'extrem':197 'feed':147 'financ':144 'function':192 'gas':152 'generat':160 'geocod':157 'header':113 'howev':170 'includ':127 'infrastructur':155 'insight':134 'json-response' 'key':98 'label':59 'learn':137 'limit':100 'list':162 'live':73 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':136 'metric':130 'multipl':124 'network':9,24,52 'no-api-key' 'openapi':220 'page':205 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,112,118 'per':3,18,36,90,168 'platform':6,21,39,122,236 'post':65 'post-endpoint' 'premium':60,181 'premium API access' 'price':146,165 'probe':174 'prompt':212 'proof':119 'protocol':44 'quot':151 'rate':99,149 'render':207 'report':131 'request':37,66,169 'request/response':223 'requir':74,105 'return':194,234 'schema':224 'sentiment':138 'simpli':107,178 'spars':198 'spec':221 'specif':54,172,242 'substant':215 'summar':141 'text':140 'token':150 'unit':80 'unknown':248 'upfront':102 'usdc':15,30,47,82,92 'usdc-base-network' 'use':41,93 'util':156 'valid':116,158 'via':10,25 'wallet':211 'web3':145 'x':111 'x-payment':110 'x402':11,26,43,68,117 'x402 API' 'x402-payment'","prices":[{"id":"3410ef80-953d-4302-99c8-d8697aaadf27","listingId":"266b0224-bee6-4ea1-b497-abe095fbf40d","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/230","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:00.233Z"}],"sources":[{"listingId":"266b0224-bee6-4ea1-b497-abe095fbf40d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/230","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:00.233Z","lastSeenAt":"2026-04-22T23:01:42.777Z"}],"details":{"listingId":"266b0224-bee6-4ea1-b497-abe095fbf40d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/230 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/payments/230"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/230"}],"useCases":["Accessing premium API functionality with per-call USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to data, AI, finance, or utility endpoints"],"bestFor":["Developers or agents wanting zero-signup, pay-per-use API access","x402-compatible clients on the Base network","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before purchasing","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:08.343Z"},"updatedAt":"2026-04-22T23:01:42.777Z"}}