{"id":"6b334d84-4b07-490a-8a77-f170952d7b1f","shortId":"gsR5h6","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints on the platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint `/api/v1/payments/308` is listed as \"Premium API Access\" but the crawled documentation does not clarify what data or functionality this particular route returns — it does not appear in the publicly listed API catalog on the homepage. The x402 challenge confirms the endpoint is live, accepting POST requests, settling payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` in USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nBecause the docs pages (`/docs`, `/api`, `/pricing`, `/README`) all returned only a \"Connect wallet\" prompt with no further content, there is no schema documentation, request/response examples, or detailed description of what this endpoint actually does. Prospective callers should be aware that the exact functionality behind this route is undocumented in the crawled material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay per call api","usdc api access","base network api","micropayment api"],"warnings":["The exact functionality of /api/v1/payments/308 is undocumented — it does not appear in the homepage's public API catalog.","All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no usable content.","No request or response schema is available; callers cannot know what to send or expect back."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/308","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/308","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and no explanation of what this specific endpoint actually returns. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. This is 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":"2026-04-19T07:02:53.556Z","embedding":[-0.015182495,-0.034332275,0.048339844,0.025314331,0.0021095276,-0.03527832,-0.025787354,0.04522705,0.07006836,-0.0670166,0.018920898,-0.055725098,-0.031280518,-0.0446167,-0.027297974,0.015701294,-0.009506226,-0.0015563965,-0.036376953,0.025283813,0.040130615,-0.031219482,-0.01826477,0.035125732,0.0023078918,-0.027862549,-0.015113831,-0.01158905,-0.009628296,-0.044921875,0.027755737,-0.025802612,-0.014053345,0.0037555695,-0.03164673,-0.016967773,-0.008895874,0.04434204,0.032104492,-0.014289856,-0.00630188,-0.050933838,-0.005962372,0.0034275055,-0.06323242,-0.0066833496,-0.00040006638,-0.019210815,-0.007949829,0.018707275,-0.03579712,-0.0088272095,-0.008644104,0.0051002502,0.009010315,0.0036792755,0.0077400208,-0.019546509,0.0047073364,0.013961792,-0.0014324188,-0.07196045,-0.020843506,-0.025543213,-0.0060539246,0.06677246,-0.012207031,0.04901123,0.01020813,0.0569458,0.04498291,0.059783936,0.024749756,0.017562866,-0.00093078613,-0.010826111,0.014602661,0.061676025,-0.017684937,-0.014389038,-0.017837524,-0.01574707,-0.048431396,-0.00484848,-0.01751709,-0.039367676,-0.024459839,0.01108551,-0.026687622,0.016845703,-0.06756592,-0.0023097992,-0.011222839,0.008720398,0.0052604675,-0.011680603,-0.017623901,0.008529663,-0.012359619,0.017669678,0.020553589,-0.051635742,0.017288208,0.0018825531,0.049316406,0.05114746,0.017211914,0.038726807,0.007347107,-0.019424438,-0.020446777,0.017929077,-0.006790161,-0.005455017,0.01651001,0.022033691,-0.025009155,0.019317627,-0.01928711,0.02178955,-0.049072266,0.0501709,0.010299683,-0.012626648,0.0154418945,-0.046813965,-0.0027256012,0.011894226,-0.022827148,-0.01322937,0.024642944,0.0064735413,0.027236938,-0.012168884,-0.033355713,0.016082764,-0.023849487,-0.007575989,-0.04598999,-0.035491943,0.035247803,-0.02218628,0.02633667,0.036132812,-0.10357666,-0.009773254,-0.037353516,0.01928711,-0.03378296,-0.011497498,-0.0020828247,0.018630981,-0.016021729,-0.008338928,-0.029434204,-0.024673462,0.0034446716,0.028442383,-0.032440186,0.06185913,-0.013412476,0.022003174,0.018325806,0.009002686,0.029647827,0.034332275,-0.00086832047,-0.07531738,-0.083496094,-0.020523071,-0.008224487,-0.0124435425,-0.035125732,0.010810852,-0.00774765,-0.064453125,-0.030548096,-0.0056610107,-0.0024032593,-0.039886475,0.006614685,-0.038360596,0.020233154,-0.0031967163,-0.069885254,-0.021347046,-0.023391724,0.060455322,0.025787354,0.012374878,0.041778564,-0.02305603,0.056884766,0.011734009,-0.028076172,-0.032165527,0.028030396,-0.0102005005,0.022384644,0.007347107,-0.004497528,-0.041503906,0.0345459,0.07775879,0.019210815,-0.010627747,0.0010671616,-0.038909912,-0.03692627,-0.0435791,0.0101623535,0.00026154518,0.0068359375,0.034057617,-0.023635864,-0.030227661,-0.00015199184,0.009712219,0.021713257,0.047790527,0.015853882,-0.0030097961,0.025436401,0.025802612,-0.03842163,0.03302002,0.025268555,0.017074585,-0.03213501,-0.019424438,0.027420044,0.029647827,-0.025817871,0.020233154,-0.009750366,0.03338623,-0.013748169,0.020431519,0.0231781,-0.017211914,-0.028335571,-0.03326416,-0.01979065,0.028335571,-0.0006828308,-0.018676758,-0.036468506,-0.06652832,0.0473938,0.048461914,0.044433594,-0.0034370422,0.012428284,-0.02268982,-0.031280518,-0.07128906,0.05908203,0.082458496,-0.010810852,-0.0107421875,0.012840271,-0.013320923,-0.042175293,-0.011299133,-0.0062332153,-0.034729004,-0.020324707,0.0039634705,-0.044555664,0.00071048737,0.010398865,0.048095703,0.06088257,-0.0025978088,-0.050628662,-0.031143188,-0.004211426,0.014839172,-0.029251099,-0.0001244545,0.00089359283,0.012359619,0.030014038,0.004508972,0.02357483,-0.0022850037,0.0015516281,-0.005836487,-0.000036418438,-0.020950317,-0.039154053,0.0154800415,-0.007637024,-0.060760498,0.0095825195,-0.0037784576,0.059143066,-0.050720215,0.04660034,0.0031967163,-0.0061073303,0.06109619,-0.0070533752,-0.054840088,0.008483887,0.021347046,0.020111084,0.05078125,0.0012769699,-0.031402588,-0.010116577,0.071899414,-0.02432251,-0.013595581,0.02128601,0.015136719,0.03945923,-0.0034046173,-0.05505371,-0.022567749,-0.0066375732,-0.022369385,0.0209198,-0.025177002,0.032104492,-0.01108551,0.0032634735,-0.018844604,-0.007701874,-0.033935547,0.014144897,-0.013839722,0.0036087036,-0.020050049,-0.017059326,0.021118164,0.014892578,-0.00012803078,0.010910034,0.047210693,0.019302368,-0.007926941,-0.026565552,-0.024230957,-0.026321411,0.012329102,0.02218628,0.026550293,0.009483337,0.052093506,-0.042510986,0.027191162,0.04031372,0.017913818,0.029434204,0.009391785,0.005596161,-0.08306885,-0.06951904,-0.028686523,-0.04324341,0.023849487,0.0025367737,-0.00088071823,0.049316406,0.014945984,-0.019821167,-0.050750732,0.021774292,-0.042633057,-0.0040283203,0.039489746,-0.00819397,-0.020690918,0.003686905,-0.006259918,0.00333786,0.028884888,0.020767212,0.020950317,0.06112671,0.04916382,0.0051116943,0.015136719,0.0140686035,0.02053833,0.0031108856,-0.021911621,-0.02078247,-0.025024414,0.023162842,-0.0038471222,-0.0118255615,-0.068847656,0.05368042,0.052703857,0.0826416,0.0124435425,0.007411957,0.029907227,-0.012306213,-0.0002872944,-0.023925781,-0.013961792,-0.023864746,-0.044891357,0.02104187,-0.017150879,-0.0030822754,-0.009025574,0.028686523,0.0042266846,0.020980835,-0.031402588,0.061401367,-0.004360199,-0.00623703,0.014694214,0.003692627,0.03656006,0.050476074,-0.040161133,0.025283813,0.019943237,-0.039154053,-0.0001013875,0.028442383,-0.015090942,-0.0041656494,-0.054260254,-0.020874023,0.002035141,-0.0013847351,-0.05441284,0.0008831024,0.007255554,0.021774292,0.019714355,-0.012199402,-0.03213501,0.002313614,-0.014984131,-0.05657959,-0.009880066,-0.02482605,0.017654419,0.046142578,-0.028259277,-0.0007047653,0.0073928833,-0.014022827,0.005935669,-0.004638672,0.020217896,-0.0070648193,-0.038085938,0.031951904,0.0069618225,0.02116394,0.01222229,0.030090332,0.015350342,0.024795532,0.049468994,0.0057029724,-0.026184082,-0.056427002,0.021438599,-0.0552063,-0.007457733,0.022277832,-0.015602112,-0.011413574,-0.020233154,-0.015075684,-0.033203125,0.0015230179,-0.013633728,0.0041923523,0.02519226,-0.025512695,-0.03793335,-0.04626465,-0.02330017,0.0102005005,0.06713867,0.0289917,-0.0021095276,-0.055786133,-0.007522583,0.023788452,0.0093688965,0.011314392,-0.014801025,-0.012504578,-0.017715454,-0.028869629,-0.012573242,-0.019943237,0.019760132,-0.0035686493,-0.006126404,0.029830933,-0.0015211105,0.016906738,0.0077285767,0.009094238,0.031402588,-0.032836914,-0.005962372,-0.018722534,0.030197144,0.0045928955,-0.0118637085,-0.048553467,0.04083252,0.010475159,0.028442383,-0.03111267,-0.0062446594,-0.0005373955,0.014823914,0.015686035,-0.007335663,-0.011070251,-0.00969696,-0.04852295,-0.072021484,0.04168701,-0.015602112,0.030960083,0.020233154,0.010627747,0.023284912,0.0036964417,-0.011329651,0.030914307,-0.024246216,-0.012397766,-0.027709961,-0.034118652,-0.014587402,-0.0019254684,-0.016983032,0.022521973,-0.01638794,0.016571045,0.0051879883,-0.023757935,0.021774292,-0.004878998,0.006626129,0.018218994,0.008529663,0.027130127,0.044647217,0.008735657,-0.035095215,0.015670776,0.0058250427,0.013298035,-0.010620117,0.041168213,0.029052734,-0.009246826,0.0014286041,-0.0074005127,-0.020233154,-0.017074585,-0.0027389526,0.0039024353,0.02859497,-0.004776001,-0.036499023,0.027999878,0.0073013306,-0.035949707,-0.021148682,0.013656616,0.00957489,-0.028625488,0.012924194,0.03173828,0.060913086,-0.020202637,0.00006920099,0.023757935,0.033477783,0.032348633,0.005367279,-0.025100708,0.014579773,-0.007118225,0.023162842,-0.00093984604,-0.0060195923,0.013168335,0.009544373,0.023208618,0.024902344,0.0060539246,-0.019943237,-0.023101807,-0.0012054443,-0.01259613,-0.015625,0.017059326,0.01576233,0.026046753,-0.020980835,0.02218628,0.020812988,-0.022705078,-0.02230835,-0.012565613,0.03326416,-0.024734497,-0.01713562,0.0099105835,0.014549255,0.030914307,-0.05593872,0.0063934326,0.0063552856,0.015686035,-0.02507019,-0.043395996,-0.043640137,0.013557434,0.03237915,0.01537323,0.016708374,0.031066895,-0.006099701,0.00025200844,0.023712158,0.0134887695,-0.019821167,-0.018203735,-0.041137695,-0.008178711,-0.0013923645,-0.0030593872,-0.02027893,0.0069885254,-0.013832092,-0.01939392,0.012046814,-0.0069732666,-0.0099105835,-0.008720398,0.009094238,0.038116455,-0.007785797,0.01322937,-0.022445679,-0.022460938,0.0019512177,0.012672424,0.021240234,-0.04699707,0.017974854,-0.013557434,-0.002878189,-0.0016765594,0.012626648,0.023330688,0.033050537,0.013908386,0.029129028,-0.05218506,0.028915405,-0.029342651,0.014678955,0.006801605,-0.036743164,-0.0042495728,-0.028503418,-0.022750854,0.03942871,-0.020965576,-0.021026611,-0.024627686,-0.048858643,-0.018173218,-0.051116943,0.016937256,0.041381836,0.031097412,-0.031951904,0.008552551,-0.004760742,0.0059394836,-0.014801025,0.0031337738,-0.014312744,0.0155181885,0.008872986,0.007282257,-0.04067993,-0.02520752,-0.024719238,-0.00088071823,-0.043121338,-0.043304443,-0.01966858,-0.0018825531,-0.004714966,-0.014328003,-0.03704834,-0.02330017,0.0025291443,-0.051330566,0.012298584,0.008888245,0.016082764,0.0015220642,-0.020690918,-0.00015902519,0.014167786,-0.009140015,0.033447266,0.018066406,-0.014984131,-0.04852295,0.0038642883,0.017913818,0.025344849,0.0014429092,-0.0047912598,-0.011253357,-0.019851685,-0.059631348,-0.014984131,-0.016296387,-0.009605408,-0.011238098,0.010536194,-0.043426514,0.0024356842,-0.018981934,0.0013513565,0.013504028,0.028030396,0.013870239,0.00009685755,0.003944397,-0.009010315,-0.026184082,-0.031829834,0.02180481,0.010765076,0.0028533936,0.019042969,0.048919678,0.0075569153,-0.013977051,0.008255005,0.010177612,0.016220093,-0.024108887,0.008773804,-0.018096924,-0.0009536743,-0.016204834,-0.0014190674,-0.0317688,-0.0062675476,0.092285156,-0.0024337769,-0.008888245,-0.017669678,-0.025131226,0.02281189,0.04119873,-0.04144287,-0.000039935112,-0.03466797,0.021133423,-0.015296936,0.018096924,0.021484375,0.021530151,-0.021224976,-0.05319214,-0.0061798096,0.0047416687,-0.021347046,-0.059783936,-0.022354126,-0.06695557,-0.012191772,-0.010520935,-0.014167786,0.0018072128,0.014274597,-0.0067825317,-0.091674805,0.0006709099,0.04373169,0.016860962,0.019943237,-0.016662598,0.03201294,0.023864746,-0.030563354,-0.01763916,0.027633667,-0.027664185,-0.0041046143,-0.029830933,0.02229309,-0.013687134,-0.02331543,0.017700195,0.015113831,0.012580872,-0.020324707,0.006210327,-0.022888184,0.0008921623,-0.013114929,0.022506714,-0.007637024,-0.0077934265,0.040649414,-0.05178833,0.024414062,0.024230957,-0.0030384064,0.0003437996,0.028701782,0.027954102,-0.037963867,-0.0056152344,0.020080566,0.013320923,0.035980225,-0.025466919,0.037322998,0.01739502,-0.013671875,0.019073486,-0.006401062,-0.016815186,-0.045074463,-0.026641846,0.029312134,-0.0070724487,0.021621704,-0.016738892,0.006752014,0.012069702,0.00049352646,0.0096206665,-0.009498596,-0.028945923,-0.01133728,0.0032749176,0.008766174,0.011802673,0.0064086914,0.020050049,0.01663208,0.039123535,0.007621765,-0.01234436,0.0027809143,0.020812988,-0.014801025,0.021575928,0.026550293,-0.0029525757,0.01461792,0.01701355,0.017791748,-0.043151855,-0.004383087,-0.021392822,-0.0049057007,0.0028305054,-0.008903503,-0.01676941,-0.007221222,-0.0038967133,-0.009963989,-0.039154053,0.012390137,-0.03012085,-0.02420044,-0.010673523,-0.021469116,0.019943237,0.011100769,0.0158844,0.025909424,0.00024187565,0.042297363,0.0037841797,-0.0154800415,0.03338623,0.026733398,0.008110046,-0.025283813,-0.006629944,-0.0045776367,-0.0026893616,0.00035452843,-0.031036377,0.011047363,0.037597656,-0.013320923,0.01739502,-0.0033893585,0.03765869,-0.010360718,0.014656067,-0.009086609,0.014762878,-0.015258789,0.03375244,-0.048797607,0.009315491,0.026901245,-0.00057172775,-0.008934021,-0.0029945374,-0.030456543,0.022277832,0.003873825,-0.015419006,0.046569824,-0.00031232834,0.028442383,-0.028839111,-0.0064926147,0.00031161308,-0.027160645,-0.020706177,0.03074646,0.0043563843,0.0043144226,0.023208618,-0.046051025,0.037750244,-0.0284729,0.023483276,-0.002855301,0.007659912,-0.0062446594,-0.024353027,-0.020980835,-0.01828003,-0.011627197,-0.005748749,0.0047798157,0.048217773,0.016067505,0.023605347,0.04788208,0.011482239,0.0031051636,-0.03451538,-0.033111572,0.0020542145,-0.019927979,0.020599365,-0.012435913,0.06213379,0.044891357,0.0018053055,0.03564453,0.037994385,0.034118652,0.008171082,0.011383057,-0.010437012,0.0103302,-0.009552002,0.023910522,0.0022354126,0.04067993,-0.0340271,0.03265381,0.013786316,0.032470703,-0.028884888,0.03387451,0.062438965,0.0129470825,-0.013023376,0.044036865,-0.003353119,-0.009811401,-0.01789856,-0.019332886,0.054626465,0.0027198792,0.0637207,0.0440979,0.020874023,-0.011787415,0.030593872,-0.020690918,-0.028808594,0.06036377,0.022033691,-0.02557373,-0.018859863,-0.013504028,0.005077362,-0.049743652,-0.035247803,0.013473511,-0.003660202,0.011993408,-0.0049438477,0.0023498535,-0.0154418945,0.011199951,0.025802612,0.01675415,-0.015151978,0.03375244,0.0289917,0.0016956329,0.023269653,-0.0037555695,0.025848389,-0.027313232,-0.020584106,0.02003479,0.023757935,-0.009346008,-0.008041382,0.02229309,0.0020694733,0.05090332,0.043060303,-0.020050049,0.0061416626,0.036895752,0.008766174,-0.011528015,0.055511475,0.036193848,0.01020813,0.038024902,0.034118652,0.030670166,-0.035369873,0.017929077,-0.0016880035,0.006072998,-0.014915466,-0.0060424805,0.005569458,-0.012763977,0.015136719,0.00045633316,-0.020385742,0.0178833,0.025253296,-0.0038414001,-0.0034770966,-0.011131287,0.015930176,-0.025497437,0.0025463104,0.016555786,-0.01374054,0.040802002,0.0074272156,0.027023315,-0.026733398,0.02935791,-0.0104904175,-0.0072288513,0.000037789345,0.02658081,-0.042266846,-0.0010118484,-0.0036449432,0.008049011,-0.04510498,0.01096344,0.024597168,-0.017059326,0.024368286,0.0062675476,-0.00002527237,0.00015807152,0.021759033,0.008049011,-0.0027256012,-0.005443573,-0.019012451,0.034576416,0.049743652,0.0013227463,0.011878967,-0.014511108,-0.009796143,0.0056648254,0.0022125244,-0.0055160522,-0.013336182,-0.013465881,-0.03302002,0.016815186,0.033569336,0.020507812,0.033203125,-0.008163452,-0.009605408,0.004840851,0.027374268,0.012565613,-0.005771637,-0.02104187,0.013542175,-0.023025513,0.05239868,0.040283203,0.0063209534,0.027893066,-0.017318726,-0.026184082,0.008705139,-0.013450623,0.02230835,-0.017440796,0.0018959045,-0.0043029785,0.02897644,-0.020141602,-0.034362793,0.012931824,-0.01651001,-0.014717102,-0.028396606,0.006248474,0.011123657,0.031982422,0.041259766,0.011482239,-0.03152466,0.0692749,-0.017471313,0.052368164,-0.005947113,-0.0070266724,0.04901123,0.03012085,0.03503418,0.027679443,0.00522995,-0.03237915,0.023361206,0.035308838,0.02999878,0.012298584,-0.0017299652,-0.022476196,0.03439331,-0.0006299019,0.023162842,-0.014472961,-0.007083893,0.008857727,-0.01020813,-0.0021095276,0.0028152466,-0.012329102,0.010345459,0.03643799,-0.029678345,-0.010437012,-0.023117065,-0.008605957,0.026428223,-0.012550354,0.0029792786,0.011222839,-0.024734497,0.023834229,-0.030273438,-0.020202637,-0.0022697449,0.023452759,-0.03756714,-0.021438599,0.001364708,0.01209259,-0.020599365,0.03353882,0.021896362,0.0042686462,0.0055732727,0.04647827,-0.009140015,0.035461426,-0.023864746,0.026473999,0.031585693,0.001373291,-0.009895325,0.013977051,0.018173218,-0.020065308,0.00920105,0.03503418,-0.00705719,0.004295349,0.002714157,-0.009407043,0.011772156,0.0013685226,-0.004299164,-0.0012025833,-0.006187439,-0.011764526,-0.0017681122,0.013137817,0.0002439022,0.009628296,-0.0047073364,-0.009468079,0.014839172,0.044891357,0.014022827,-0.04324341,-0.0030975342,0.004558563,0.013397217,-0.020233154,-0.012535095,0.0049324036,-0.028442383,0.016921997,0.018875122,0.0110321045,0.012458801,-0.02810669,-0.0040512085,0.023956299,0.02734375,0.027664185,0.0031700134,0.00064754486,0.0158844,-0.012016296,-0.0037231445,-0.008491516,-0.00907135,0.016082764,0.023651123,-0.006313324,-0.027267456,0.02458191,-0.0054855347,0.009292603,0.0037155151,-0.019683838,0.014091492,-0.008659363,-0.008705139,0.00045752525,0.0075302124,-0.0090789795,-0.0129776,-0.013320923,0.022888184,0.051635742,-0.015205383,-0.0073127747,0.023117065,0.01537323,0.017349243,0.03164673,0.007118225,0.042266846,0.02583313,-0.020584106,-0.019134521,0.018585205,-0.016738892,-0.027191162,0.016113281,-0.019470215,-0.021484375,0.009765625,0.018218994,-0.0001951456,-0.028182983,-0.019317627,-0.013618469,-0.015281677,0.021362305,-0.019851685,0.013435364,-0.027786255,-0.008071899,0.0029506683,-0.012664795,-0.042999268,-0.021209717,-0.0020427704,-0.011566162,-0.05142212,0.017333984,-0.03250122,0.012748718,-0.017974854,-0.0061073303,-0.019851685,0.024108887,-0.018539429,-0.010856628,0.013137817,0.030334473,0.013206482,0.008079529,0.025161743,-0.027160645,-0.029464722,-0.025772095,-0.0003209114,-0.013160706,0.02619934,-0.00242424,0.0357666,0.024765015,-0.0152282715,-0.0021190643,-0.008758545,-0.00724411,-0.010055542,-0.021102905,-0.014526367,0.016525269,0.010787964,0.0027580261,-0.015090942,0.037902832,-0.02961731,-0.012023926,0.028579712,0.048217773,0.011131287,0.033233643,-0.012123108,-0.011314392,-0.021713257,0.0050582886,-0.021072388,0.017807007,0.0008544922,0.005580902,-0.017715454,0.002784729,0.024414062,-0.0017299652,-0.009063721,0.020690918,-0.0063667297,-0.0029468536,0.038604736,0.010383606,0.0031795502,-0.007801056,-0.014022827,0.024902344,0.03930664,0.01247406,0.0066604614,-0.0003874302,0.015548706,-0.017059326,0.0049476624,0.022750854,-0.01474762,-0.038757324,-0.01020813,-0.025360107,0.01776123,0.003818512,0.015350342,-0.005344391,0.01689148,-0.020401001,-0.027893066,-0.019363403,0.0256958,0.013618469,-0.009307861,-0.0057411194,-0.0006952286,0.017730713,-0.02458191,0.0024299622,-0.033935547,-0.0395813,-0.007980347,-0.023910522,0.022506714,0.012268066,-0.011520386,-0.001241684,-0.010368347,-0.004623413,0.00806427,0.021392822,-0.017578125,-0.015220642,0.024459839,0.014801025,-0.022888184,0.010124207,-0.007896423,-0.0040283203,0.025665283,-0.008399963,0.010948181,-0.014221191,0.035614014,-0.0035820007,-0.003446579,0.0309906,0.0078048706,0.012069702,-0.03488159,0.010643005,-0.0026283264,-0.0035190582,0.024353027,-0.031066895,-0.015419006,0.006412506,-0.021697998,-0.034332275,0.011779785,0.014984131,0.036987305,-0.009361267,0.035980225,-0.025283813,-0.022460938,0.022613525,0.008613586,-0.027954102,-0.00072717667,0.03555298,0.0034809113,-0.008010864,-0.00907135,-0.01285553,-0.035949707,-0.007091522,0.013130188,-0.007835388,-0.010559082,0.020385742,0.011024475,0.042053223,-0.0001667738,0.01713562,0.019042969,0.0060272217,0.026184082,0.007083893,0.047698975,-0.0048217773,-0.026672363,0.006034851,-0.0031929016,-0.023590088,-0.009429932,-0.013511658,0.006259918,-0.040130615,0.015586853,-0.0046081543,0.02859497,-0.01977539,0.014839172,-0.024353027,0.005569458,-0.03173828,-0.023422241,-0.021347046,0.014343262,0.032684326,-0.00032615662,0.022644043,0.0032176971,-0.02267456,0.01625061,0.046844482,-0.005001068,-0.030273438,-0.015060425,0.012298584,0.003314972,0.008529663,0.008552551,-0.018814087,-0.028579712,0.009170532,-0.021865845,0.004802704,-0.008094788,0.014472961,0.0052261353,-0.0010099411,-0.003627777,0.029174805,-0.0020217896,0.0017471313,0.008293152,0.009010315,0.036499023,0.0345459,-0.015426636,0.024215698,0.02645874,-0.034301758,0.059051514,-0.003353119,0.025436401,-0.015220642,-0.006462097,-0.045135498,-0.027862549,-0.0121154785,0.007129669],"createdAt":"2026-04-18T18:50:21.699Z","updatedAt":"2026-04-23T12:31:28.421Z","lastSeenAt":"2026-04-23T12:31:28.421Z","tsv":"'/api':182 '/api/v1/payments/308':105 '/docs':181 '/pricing':183 '/readme':184 '/request':13,28 '0.02':12,27,80,176 '000':167 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':155 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':158 '20':166 '6':172 'accept':148 'access':7,22,38,111 'actual':210 'address':154 'ai':67 'amount':163 'analyt':66 'api':6,21,37,63,92,110,135 'appear':130 'awar':216 'base':9,24,88,160,168 'base network api' 'behind':221 'broad':56 'call':4,19 'caller':213 'catalog':57,136 'challeng':142 'clarifi':118 'commit':100 'confirm':143 'connect':189 'content':195 'crawl':114,228 'data':65,120 'decim':173 'descript':205 'detail':204 'doc':179 'document':115,200 'endpoint':32,49,76,104,145,209 'equal':175 'exact':219 'exampl':202 'financ':70 'function':122,220 'homepag':139 'infrastructur':73 'key':93 'learn':69 'limit':96 'list':107,134 'live':147 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':48 'materi':229 'maximum':162 'micropayment api' 'minimum':99 'network':89 'no-api-key' 'offer':54 'one':46 'page':180 'paid':83 'particular':124 'pay':2,17,60 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':59 'payment':42,152 'per':3,18,61,81 'platform':52 'post':149 'post-method' 'premium':5,20,36,109 'price':78 'prompt':191 'prospect':212 'protocol':43 'provid':35 'public':133 'rate':95 'request':62,82,150 'request/response':201 'requir':101,164 'return':126,186 'rout':125,223 'schema':199 'settl':151 'span':64 'specif':103 'undocu':225 'unit':169 'usdc':15,30,85,157,171 'usdc api access' 'usdc-base' 'util':74 'via':10,25,39 'wallet':190 'web3':71 'x402':11,26,41,141 'x402 api' 'x402-payment'","prices":[{"id":"2187b8e3-06ce-444a-8ec0-c444ea87e6e5","listingId":"6b334d84-4b07-490a-8a77-f170952d7b1f","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/308","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:21.699Z"}],"sources":[{"listingId":"6b334d84-4b07-490a-8a77-f170952d7b1f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/308","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:21.699Z","lastSeenAt":"2026-04-23T12:31:28.421Z"}],"details":{"listingId":"6b334d84-4b07-490a-8a77-f170952d7b1f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/308 \\\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 402 with x402 challenge, confirming it is live on Base with USDC payment","source_url":"https://lowpaymentfee.com/api/v1/payments/308"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/308"},{"claim":"Platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access settled on Base","Testing x402 payment flows against a live, low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol integrations","AI agents that need frictionless, keyless API access","Users who prefer pay-per-use pricing with no subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before calling","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:07.295Z"},"updatedAt":"2026-04-23T12:31:28.421Z"}}