{"id":"b886991d-314c-4adc-9a18-d0c64883f0bd","shortId":"HwxAZE","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC with no API keys.","tagline":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC with no API keys.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific path `/api/v1/backups/38` suggests a data backup or retrieval service, though the exact response payload is not documented beyond a generic \"application/json\" MIME type.\n\nThe provider operates a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities—all priced at $0.02 per call (20,000 base units of USDC on Base, which has 6 decimals = $0.02). Payment is handled entirely via the x402 protocol: callers attach an `X-PAYMENT` header with a signed payment proof; no API keys, accounts, or rate limits are required. The payment settles to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.\n\nDocumentation is extremely sparse—the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what the `/backups/38` resource actually returns. The endpoint is confirmed live (returns a valid 402 challenge), but without documentation the actual utility is unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","json-response","backup-retrieval"],"categories":["storage","infrastructure"],"synonyms":["x402 backup API","pay-per-call data endpoint","USDC micropayment API","Base network API","lowpaymentfee","premium data access","crypto-paid API"],"warnings":["No documentation available—docs/pricing/API pages all show only 'Connect wallet'","No OpenAPI or schema describing request body or response format","The specific resource '/backups/38' is not listed on the provider's homepage catalog","Actual content/utility of the backup endpoint is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/38","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/backups/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation, no OpenAPI spec, no example payloads, and no explanation of what /backups/38 actually returns. The listing is effectively a stub with pricing and protocol details only.","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":"2026-04-19T16:05:02.351Z","embedding":[-0.028747559,-0.00082731247,0.049560547,-0.001871109,0.021835327,-0.013343811,-0.016326904,0.042419434,0.05960083,-0.09576416,0.022583008,-0.030395508,-0.03817749,-0.071899414,-0.024780273,0.029373169,-0.036468506,-0.010955811,-0.057647705,0.0063056946,0.015586853,-0.029953003,-0.0115356445,0.019088745,0.016174316,-0.025100708,-0.01626587,-0.018951416,0.0063591003,-0.055023193,0.027862549,-0.028076172,-0.0035552979,-0.0011348724,0.0010137558,0.015098572,0.0105896,0.030090332,0.033996582,-0.012825012,0.019592285,-0.057800293,0.009086609,0.003742218,-0.008506775,-0.018508911,0.0005578995,-0.026657104,0.0010652542,-0.021728516,-0.024932861,-0.006690979,-0.04385376,0.018508911,0.023147583,0.014053345,0.010047913,-0.009841919,0.008491516,0.024490356,0.0023403168,-0.052459717,-0.03253174,-0.0368042,0.001156807,0.04776001,0.0158844,0.059814453,-0.0154418945,0.065979004,0.031036377,0.04989624,0.019729614,0.0054359436,-0.0038089752,-0.0046844482,0.017425537,0.06500244,-0.009117126,-0.0231781,0.0024700165,0.016174316,-0.037200928,0.0013847351,-0.009559631,-0.03665161,-0.020431519,0.0098724365,-0.022842407,0.061065674,-0.04788208,0.0047721863,-0.0071868896,-0.0053215027,0.0025196075,-0.020843506,-0.028182983,0.007701874,-0.005126953,0.008201599,-0.011764526,-0.021240234,0.010017395,-0.028717041,0.050872803,0.025100708,0.02154541,0.0061149597,0.0078125,-0.012458801,-0.046173096,-0.0054397583,0.00085639954,-0.032836914,0.0023860931,0.019256592,-0.053375244,0.022857666,-0.006729126,0.029464722,-0.046966553,0.051330566,0.021942139,-0.011268616,0.02432251,-0.035095215,-0.012825012,0.005607605,-0.029571533,-0.010597229,0.037017822,0.012512207,0.033996582,-0.02784729,0.012161255,0.015159607,-0.027114868,-0.00920105,-0.05770874,-0.023330688,0.04055786,-0.047821045,0.013931274,0.021011353,-0.11468506,0.009292603,-0.044189453,0.029388428,-0.014053345,0.0032691956,-0.008522034,0.01979065,-0.01574707,-0.005722046,-0.031829834,-0.023025513,-0.010299683,0.0066833496,-0.009986877,0.034210205,-0.04147339,0.033996582,0.01574707,-0.018920898,0.033966064,0.03967285,-0.03201294,-0.09674072,-0.08856201,-0.040985107,-0.01398468,-0.000029325485,-0.030883789,0.000770092,-0.0047302246,-0.04031372,-0.035736084,0.030731201,0.008277893,-0.048034668,-0.004676819,-0.06173706,0.037017822,-0.0052757263,-0.04736328,-0.011734009,-0.029571533,0.055847168,0.008110046,0.018096924,0.025680542,0.0028152466,0.053833008,0.019302368,-0.037261963,-0.04107666,0.01512146,-0.037017822,0.038360596,0.0021476746,0.0074005127,-0.026367188,0.02796936,0.043823242,0.0030345917,0.0022029877,-0.02658081,-0.049316406,-0.06640625,-0.044830322,0.015060425,-0.0035095215,-0.03173828,0.014427185,-0.043304443,-0.027786255,0.005672455,0.012069702,0.019317627,0.058898926,0.00497818,-0.0025463104,0.0038871765,0.027404785,-0.008277893,0.033050537,0.027526855,-0.0050697327,-0.020462036,-0.021057129,0.00983429,0.03668213,-0.03665161,0.021835327,-0.011360168,0.019638062,-0.0017356873,-0.0066337585,0.024520874,-0.004306793,-0.018920898,-0.026428223,-0.035888672,0.014099121,-0.00078964233,-0.013511658,-0.035369873,-0.052734375,0.028564453,0.056365967,0.023345947,-0.0072135925,-0.010299683,-0.040008545,-0.016952515,-0.060272217,0.031707764,0.07751465,-0.023269653,-0.015068054,0.010757446,-0.008766174,-0.023971558,-0.020889282,-0.004966736,-0.009056091,0.010063171,-0.0059318542,-0.04840088,0.00080394745,0.011459351,0.03086853,0.066345215,-0.027526855,-0.04510498,0.005706787,-0.000047922134,-0.029373169,-0.017547607,0.0005531311,0.0064735413,0.010505676,0.0154800415,-0.005580902,0.027175903,0.017059326,0.014877319,-0.0034828186,-0.0109939575,-0.013702393,-0.061401367,0.015899658,0.009971619,-0.049102783,0.034210205,-0.0077209473,0.023498535,-0.015289307,0.039276123,-0.020004272,0.023727417,0.018356323,-0.030532837,-0.029190063,-0.0031280518,-0.003917694,0.013946533,0.05609131,-0.00075149536,-0.009925842,-0.029724121,0.061523438,-0.026779175,-0.019592285,-0.02986145,0.0149002075,0.038116455,0.01146698,-0.05657959,-0.0635376,-0.004032135,-0.048217773,0.017578125,-0.029449463,0.0011730194,0.006084442,-0.0049819946,-0.016052246,0.00055217743,-0.01713562,0.0009112358,-0.014854431,-0.0011301041,-0.022369385,-0.010108948,0.01171875,0.02178955,-0.02017212,-0.0009908676,0.009757996,0.008712769,-0.0065612793,-0.04019165,-0.044555664,-0.015365601,-0.012298584,0.042816162,0.040863037,0.0008993149,0.042755127,-0.04498291,0.008422852,0.008605957,-0.012527466,0.037384033,0.013496399,-0.0054473877,-0.07086182,-0.039154053,-0.017959595,-0.03604126,0.02859497,0.023727417,-0.01209259,0.05935669,0.007282257,-0.04232788,-0.03668213,0.03668213,-0.03643799,-0.004585266,0.044189453,-0.032165527,-0.01776123,-0.008544922,-0.020950317,0.013183594,0.023849487,0.0036087036,0.027175903,0.07385254,0.04373169,0.0055999756,0.027404785,0.046081543,0.031585693,-0.013191223,-0.020843506,-0.016082764,-0.03753662,0.008117676,-0.024658203,-0.03466797,-0.06665039,0.040008545,0.042877197,0.0635376,0.008895874,-0.0016822815,0.018447876,-0.024993896,0.016799927,-0.05215454,-0.020996094,-0.014076233,-0.044311523,0.041046143,-0.023208618,0.000117242336,-0.053771973,0.02154541,0.017929077,0.012039185,-0.021347046,0.04937744,-0.005657196,0.0025100708,0.041015625,0.001156807,0.033233643,0.03942871,-0.030914307,0.004962921,0.004070282,-0.04586792,0.01361084,0.015853882,0.0049095154,-0.0042495728,-0.047332764,-0.030654907,-0.001162529,-0.02281189,-0.032684326,0.008041382,0.0019817352,0.03164673,0.011276245,-0.020767212,-0.0018777847,0.019378662,0.0006222725,-0.0602417,0.0046081543,-0.03668213,0.012535095,0.037506104,-0.018615723,0.0024852753,-0.02268982,0.017410278,0.022521973,-0.018920898,0.016921997,-0.0017986298,-0.052886963,0.015602112,0.011383057,0.014526367,0.014450073,0.036468506,0.027694702,0.041656494,0.030166626,0.025283813,-0.04034424,-0.037719727,0.0211792,-0.04156494,0.00491333,0.0012750626,-0.006401062,0.0044898987,-0.0071792603,-0.01889038,-0.033935547,-0.02230835,-0.0004503727,0.010826111,0.03704834,-0.027557373,-0.049224854,-0.068115234,-0.045928955,0.0029201508,0.08190918,0.033416748,0.019836426,-0.02822876,-0.028182983,0.019348145,0.0060691833,0.038269043,-0.014282227,-0.022979736,0.00630188,-0.019851685,-0.006252289,-0.009025574,0.037841797,-0.010795593,-0.008262634,0.037902832,0.010925293,0.030288696,-0.015235901,-0.008323669,0.038391113,-0.028182983,0.00066185,-0.008430481,0.015716553,0.020080566,-0.02178955,-0.03817749,0.05053711,0.010307312,0.038024902,-0.042175293,-0.009628296,0.004562378,0.010902405,0.018920898,-0.03451538,-0.010879517,-0.023117065,-0.039001465,-0.073791504,0.046051025,-0.008529663,0.025558472,0.023864746,0.0009074211,0.009109497,0.004119873,0.011650085,0.033325195,-0.017745972,-0.022827148,-0.027770996,-0.029800415,-0.0034618378,-0.0025119781,-0.015029907,0.016464233,-0.018447876,0.027175903,-0.010673523,-0.0067214966,0.040161133,0.021606445,-0.016357422,0.026885986,-0.0000166893,0.0045318604,0.027191162,-0.0022468567,-0.01776123,0.034332275,0.0054244995,0.01335144,0.014152527,0.060943604,0.026367188,-0.015144348,-0.0025348663,0.004497528,-0.03050232,-0.024108887,-0.0050811768,0.009925842,0.035064697,0.005268097,-0.04019165,0.006626129,0.029006958,-0.037963867,-0.029525757,-0.013008118,0.0062942505,-0.041229248,0.018432617,0.002521515,0.0519104,-0.023239136,-0.0031986237,0.019927979,0.020645142,0.015914917,-0.0056877136,-0.009925842,0.014656067,-0.02168274,-0.0022888184,0.015808105,0.0020771027,0.009170532,-0.0070724487,0.0113220215,0.020492554,-0.00655365,-0.015975952,-0.012496948,0.017791748,0.016418457,-0.006149292,0.020355225,0.015327454,0.0206604,-0.004524231,0.036865234,0.013252258,-0.018554688,-0.0121536255,0.014320374,0.03668213,-0.010414124,-0.004016876,0.009170532,0.013084412,0.036621094,-0.049987793,-0.004386902,0.0019550323,0.009124756,-0.029678345,-0.03982544,-0.027297974,-0.011390686,0.022506714,-0.020004272,-0.005203247,0.029006958,0.014762878,-0.0017032623,0.04525757,-0.009407043,-0.021759033,-0.021102905,-0.058013916,-0.006702423,-0.00013017654,-0.0023021698,-0.033599854,0.003944397,-0.020843506,-0.04486084,0.026000977,-0.020904541,-0.009796143,-0.0035648346,-0.008346558,0.03869629,0.0138549805,0.012542725,-0.018692017,-0.000031352043,0.004753113,-0.0037975311,0.041015625,-0.04147339,0.013252258,-0.0033035278,-0.0018510818,-0.0019721985,0.020431519,0.014915466,0.019851685,0.019805908,0.027954102,-0.033172607,0.030456543,-0.030059814,0.0022010803,-0.022506714,-0.039154053,-0.0053367615,-0.02243042,-0.00071287155,0.037200928,-0.008918762,-0.022705078,-0.037506104,-0.037109375,0.004650116,-0.03656006,0.0129852295,0.022994995,0.029907227,-0.023880005,-0.006942749,0.0022792816,0.0045547485,-0.024383545,0.015213013,0.0028095245,0.02192688,0.021011353,-0.0008444786,-0.00566864,-0.02142334,-0.029708862,-0.00085401535,-0.039520264,-0.050354004,-0.027297974,0.0023345947,0.0030288696,-0.0047950745,-0.049591064,-0.034057617,0.01525116,-0.047546387,0.009048462,-0.0005002022,0.02192688,0.0011463165,-0.0043754578,-0.00907135,0.006729126,-0.017593384,0.03378296,-0.018249512,-0.03869629,-0.03640747,0.022949219,0.012687683,0.011253357,0.0037708282,-0.029647827,-0.011817932,-0.0368042,-0.060577393,-0.0012016296,-0.010543823,-0.0043640137,-0.020095825,-0.011123657,-0.035339355,-0.0076904297,-0.029083252,-0.013442993,0.016845703,0.016143799,-0.010047913,-0.016403198,0.016418457,-0.012397766,-0.023635864,-0.029647827,0.026809692,0.010101318,0.0033798218,-0.0020980835,0.040283203,0.0069732666,-0.02017212,-0.0055885315,-0.0031585693,0.025482178,-0.0071487427,-0.0011901855,-0.016799927,0.028793335,-0.008758545,-0.032440186,-0.05307007,-0.0050468445,0.07836914,-0.002614975,-0.018478394,-0.0008354187,-0.010597229,0.014434814,0.04525757,-0.04135132,0.014930725,-0.027816772,0.023269653,-0.028121948,0.016586304,0.020904541,0.022064209,-0.0031108856,-0.045440674,0.006362915,0.014640808,0.008796692,-0.0826416,-0.034362793,-0.047729492,-0.029876709,-0.0020523071,-0.0011825562,0.008880615,0.003835678,-0.02319336,-0.06561279,-0.006149292,0.054901123,0.0035705566,-0.0031661987,-0.010116577,0.024887085,0.018859863,-0.022705078,-0.035369873,0.011184692,-0.023910522,-0.016540527,-0.028625488,0.035614014,0.0096588135,-0.0065078735,0.024490356,0.015472412,0.02218628,-0.032806396,0.019958496,-0.02532959,-0.006664276,0.006626129,0.01361084,-0.00083065033,0.008575439,0.02017212,-0.034484863,0.023742676,0.007843018,0.02015686,0.010871887,0.019073486,0.03717041,-0.044647217,-0.015136719,0.026687622,-0.001830101,0.013923645,-0.03805542,0.054718018,0.013587952,-0.0057754517,0.012435913,-0.014892578,-0.023361206,-0.042419434,-0.041534424,-0.0019664764,0.011940002,-0.00084257126,0.0062446594,0.0077819824,0.003868103,0.00894165,-0.0070381165,-0.017852783,-0.018249512,-0.020858765,0.0131073,0.004585266,0.001080513,0.0013742447,0.032348633,0.03744507,0.05065918,0.026107788,-0.0018835068,0.0017223358,0.021621704,-0.020507812,0.00027227402,0.021392822,0.014183044,0.009628296,0.0064315796,0.017410278,-0.03677368,0.006401062,-0.025390625,-0.013458252,0.004699707,-0.028335571,-0.012748718,0.006916046,0.016708374,-0.0052719116,-0.02684021,-0.0012798309,-0.032592773,-0.016571045,-0.027145386,0.006549835,0.01701355,0.0021343231,-0.02067566,0.028930664,-0.00066280365,0.04977417,-0.022598267,-0.030197144,0.027893066,0.044891357,0.0060691833,-0.038146973,0.0014600754,0.006111145,-0.033966064,0.0056152344,-0.014282227,0.025177002,0.04269409,0.014144897,0.015686035,0.007270813,0.0181427,-0.010169983,0.0003285408,0.004863739,0.0084991455,-0.009284973,0.033843994,-0.025970459,0.00674057,0.025344849,-0.0050735474,-0.025268555,0.00831604,-0.03353882,0.023864746,-0.0031375885,0.003873825,0.04763794,-0.012969971,0.020370483,-0.034057617,-0.010002136,0.01058197,-0.043518066,-0.021759033,0.01725769,-0.009941101,-0.0090408325,0.024887085,-0.019821167,0.03062439,-0.020324707,0.0078048706,-0.004459381,0.017471313,-0.032287598,-0.017425537,-0.006298065,-0.0054359436,-0.011642456,0.009483337,0.005443573,0.029647827,0.034973145,0.018249512,0.029373169,0.0053710938,0.029388428,-0.0335083,-0.022583008,0.021118164,-0.02796936,0.022827148,-0.027282715,0.04788208,0.055633545,0.013084412,0.044403076,0.023269653,0.026412964,-0.018844604,0.020233154,-0.02885437,0.025360107,-0.0057296753,0.04638672,0.014190674,0.04425049,-0.0042533875,-0.000936985,0.025436401,0.029037476,-0.0011034012,0.036132812,0.059814453,0.0390625,-0.016647339,0.01725769,-0.014152527,-0.031677246,-0.028457642,-0.024932861,0.04522705,-0.010169983,0.042633057,0.026245117,0.00667572,0.011909485,0.050079346,-0.02784729,-0.01033783,0.054504395,0.031921387,-0.017807007,-0.01802063,-0.021484375,-0.0021247864,-0.05038452,-0.024978638,0.020629883,0.02243042,0.004211426,-0.01751709,0.0063552856,-0.010353088,0.0018453598,0.02130127,-0.0011711121,-0.027069092,0.006580353,0.016830444,-0.0019388199,0.028182983,-0.011009216,0.02859497,-0.013885498,-0.014373779,-0.0023651123,0.032348633,0.0038776398,-0.010856628,-0.0057373047,0.011642456,0.03918457,0.020599365,-0.024597168,0.005924225,0.028259277,0.01260376,0.014465332,0.04397583,0.027328491,0.03866577,0.03366089,0.025497437,0.034210205,-0.023147583,-0.0012598038,-0.0020275116,0.003982544,0.005027771,-0.024307251,0.011436462,-0.0031356812,0.026763916,-0.004009247,-0.00818634,0.02017212,0.03201294,-0.0036067963,0.0029335022,-0.0064697266,-0.006389618,0.0019893646,0.016647339,0.0033798218,-0.005428314,0.026473999,0.0077400208,0.02394104,-0.008705139,0.014038086,-0.009674072,-0.019546509,-0.017044067,0.01737976,-0.041046143,0.006549835,0.026611328,-0.016860962,-0.023498535,0.021911621,0.02557373,-0.018127441,0.01424408,-0.019958496,-0.0005207062,-0.008964539,0.03161621,0.04296875,0.005844116,-0.014297485,-0.037017822,0.0047035217,0.058563232,0.0071754456,-0.003440857,-0.031585693,-0.0027236938,0.00038313866,-0.0039596558,-0.005393982,0.014953613,-0.017044067,0.014694214,0.015701294,0.037322998,0.002161026,0.019805908,-0.0019683838,-0.007671356,-0.018478394,0.009147644,0.02520752,0.0060043335,-0.005531311,0.010665894,-0.018295288,0.035614014,0.02949524,0.0002539158,0.004562378,-0.00067806244,-0.005142212,0.009315491,-0.030349731,0.0127334595,-0.015914917,0.016571045,-0.0036067963,0.026992798,-0.016662598,-0.03933716,0.02444458,-0.021209717,-0.02368164,0.004627228,0.009361267,0.0007753372,0.016616821,0.058563232,0.016357422,-0.020767212,0.066223145,-0.014602661,0.041503906,-0.0335083,-0.010147095,0.0368042,0.02748108,0.030380249,0.024642944,0.015083313,-0.037384033,0.02067566,0.027511597,0.026733398,0.014434814,0.015007019,-0.014595032,0.029571533,0.00010430813,0.015625,0.01574707,0.009521484,0.010681152,-0.02407837,-0.023025513,0.0018148422,-0.0043525696,-0.005039215,0.051208496,-0.015838623,-0.035186768,-0.03189087,-0.025115967,0.024215698,0.0005197525,-0.010719299,0.0022735596,-0.025222778,0.002532959,-0.027374268,-0.02796936,0.011726379,0.0231781,-0.046051025,-0.00038838387,-0.007709503,0.016921997,-0.036865234,0.025360107,0.04058838,0.0087890625,0.014564514,0.028564453,-0.023773193,0.03503418,-0.0155181885,0.010551453,0.0446167,-0.0035514832,-0.015510559,0.008377075,0.009941101,-0.00415802,-0.011131287,0.01689148,0.0045166016,0.016342163,0.008468628,-0.0009021759,-0.004753113,0.014282227,0.00333786,0.010299683,-0.013832092,0.01008606,0.0029182434,0.0064888,0.014282227,0.020339966,-0.012535095,-0.0075302124,0.023345947,0.04034424,0.018737793,-0.040924072,-0.0005197525,0.018676758,0.0065078735,0.0020046234,-0.023635864,0.014282227,-0.019805908,0.005104065,0.019638062,0.0077934265,0.0058670044,-0.014091492,-0.009986877,0.015853882,0.024978638,0.009780884,0.002910614,-0.012664795,0.006401062,-0.010604858,-0.009544373,-0.020904541,-0.008255005,0.005859375,0.037231445,-0.0074501038,-0.027954102,0.00844574,-0.0050315857,0.009246826,0.0007123947,0.023590088,0.026412964,-0.001250267,-0.010093689,-0.002155304,0.028900146,-0.016799927,-0.03543091,-0.035339355,0.017929077,0.03439331,0.004737854,-0.03668213,0.011024475,0.026885986,0.013435364,0.03918457,-0.0069885254,0.056762695,0.011474609,-0.007736206,-0.029052734,-0.0008354187,-0.014465332,-0.03665161,0.018951416,-0.009292603,-0.0011177063,0.003900528,0.021514893,-0.007904053,-0.02758789,-0.017669678,-0.025756836,-0.027374268,0.032440186,-0.000096559525,0.02470398,-0.016784668,-0.0103302,0.033721924,-0.01675415,-0.03955078,-0.03677368,0.0024204254,-0.013168335,-0.05923462,0.020233154,-0.021972656,0.012939453,-0.010040283,0.013893127,-0.008766174,0.011009216,-0.0033283234,-0.0012769699,0.019927979,0.009796143,-0.02166748,0.0077285767,0.0154953,-0.020584106,-0.019256592,-0.03149414,0.02897644,-0.011474609,0.022384644,0.010116577,0.028945923,0.021621704,-0.03262329,0.011169434,-0.009101868,-0.013809204,0.013420105,-0.033843994,-0.011726379,0.013847351,0.029190063,-0.004901886,-0.0129776,0.05279541,-0.02571106,-0.035736084,0.0132369995,0.02796936,-0.0057144165,0.04336548,0.004688263,-0.017486572,-0.017196655,-0.011543274,-0.005378723,0.01033783,0.00091934204,-0.014709473,-0.0030136108,-0.01171875,-0.007419586,-0.017532349,-0.0026340485,0.009170532,0.011154175,-0.003967285,0.038330078,0.020477295,0.01084137,-0.0006070137,-0.036590576,-0.010032654,0.04916382,0.01687622,-0.003522873,0.009407043,0.004020691,-0.030914307,0.011390686,0.0005736351,-0.015174866,-0.040405273,-0.028152466,-0.034729004,0.008430481,-0.00021374226,0.018447876,0.0044403076,0.03253174,-0.013977051,-0.031219482,-0.008865356,0.01675415,0.009513855,-0.028259277,0.013389587,-0.010551453,0.009140015,-0.010513306,0.02003479,-0.043060303,-0.021697998,-0.014411926,-0.025772095,0.0062561035,0.011787415,-0.007888794,0.016571045,-0.014282227,-0.0209198,-0.019088745,0.034942627,-0.009719849,-0.011604309,0.013977051,0.018371582,-0.008964539,-0.0021076202,-0.014091492,-0.00031018257,0.018203735,-0.010444641,0.0184021,0.0021400452,0.013076782,-0.011787415,-0.027999878,0.037841797,0.0019350052,0.024276733,-0.014373779,-0.0022964478,-0.012420654,-0.017059326,0.012931824,-0.0014486313,-0.022216797,0.014724731,-0.023925781,-0.010017395,0.0073432922,-0.0013942719,0.013191223,-0.011428833,0.037750244,-0.01977539,0.0034065247,-0.0060424805,-0.010803223,-0.022628784,-0.0071144104,0.010604858,-0.009841919,-0.00080776215,-0.0051460266,-0.0071029663,-0.042022705,-0.01259613,0.019515991,-0.012176514,0.0096588135,0.03857422,0.04486084,0.037872314,0.001701355,0.011558533,0.012428284,-0.00031805038,0.02494812,0.0013332367,0.04711914,-0.018661499,-0.016174316,-0.009384155,-0.0049209595,-0.0127334595,-0.018539429,0.016784668,-0.02168274,-0.05496216,0.014785767,-0.014801025,0.02784729,-0.0101623535,0.002368927,-0.034210205,-0.003358841,-0.038391113,0.0015277863,-0.0440979,0.017669678,0.02319336,0.0055351257,0.014411926,-0.011276245,-0.029449463,0.025680542,0.045288086,-0.0143585205,-0.0340271,-0.010223389,-0.005176544,-0.012138367,0.021362305,0.018478394,-0.016189575,0.017333984,0.015083313,-0.018356323,-0.016525269,-0.009407043,0.016021729,-0.003332138,-0.03201294,-0.033325195,0.024627686,0.0072364807,-0.02067566,-0.006587982,0.0071144104,0.040283203,0.034057617,-0.0039863586,0.016448975,0.011550903,-0.047821045,0.050689697,0.00040245056,0.01625061,-0.027191162,0.005809784,-0.04711914,-0.004180908,0.008834839,-0.0066719055],"createdAt":"2026-04-18T19:59:28.051Z","updatedAt":"2026-04-22T10:32:34.508Z","lastSeenAt":"2026-04-22T10:32:34.508Z","tsv":"'/api/v1/backups/38':55 '/backups/38':195 '0.02':9,26,101,116 '000':105 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':151 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':155 '20':104 '402':207 '6':114 'Base network API' 'USDC micropayment API' 'access':42 'account':140 'actual':197,213 'address':150 'ai/ml':91 'analyt':90 'api':16,33,41,87,138,166 'application/json':74 'attach':126 'backup':59 'backup-retrieval' 'backup/data':4,21 'base':7,24,50,106,111,157 'beyond':71 'call':103 'caller':125 'challeng':208 'confirm':202 'connect':172 'contract':154 'crypto-paid API' 'data':58,89,94 'decim':115 'descript':191 'detail':179 'doc':163 'document':70,158,211 'endpoint':5,22,36,200 'entir':120 'exact':65 'exampl':186 'extrem':160 'finance/web3':93 'gate':3,20 'generic':73 'handl':119 'header':131 'infer':92 'infrastructur':96 'json-response' 'key':17,34,139 'limit':143 'live':203 'lowpaymentfee' 'lowpaymentfee.com':38 'mime':75 'network':51 'no-api-key' 'openapi':183 'oper':79 'page':167 'path':54 'pay':8,25,84 'pay-per-call data endpoint' 'pay-per-request':83 'payload':67,188 'payment':46,117,130,135,147 'per':10,27,85,102 'premium':40 'premium data access' 'price':99,164 'prompt':174 'proof':136 'protocol':47,124 'provid':39,78 'rate':142 'render':169 'request':11,28,86 'request/response':187 'requir':145 'resourc':196 'respons':66 'retriev':61 'return':198,204 'servic':62 'settl':148 'sign':134 'span':88 'spars':161 'spec':184 'specif':53 'suggest':56 'suit':81 'technic':178 'though':63 'type':76 'unclear':216 'unit':107 'usdc':13,30,109,153 'usdc-base' 'use':152 'util':97,214 'valid':206 'via':43,121 'wallet':173 'without':210 'x':129 'x-payment':128 'x402':2,19,45,123 'x402 backup API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"2737f29c-d3e7-4f00-bd6d-966e3b6e242d","listingId":"b886991d-314c-4adc-9a18-d0c64883f0bd","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/backups/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:28.051Z"}],"sources":[{"listingId":"b886991d-314c-4adc-9a18-d0c64883f0bd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/38","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:28.051Z","lastSeenAt":"2026-04-22T10:32:34.508Z"}],"details":{"listingId":"b886991d-314c-4adc-9a18-d0c64883f0bd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/38 \\\n  -H \"X-PAYMENT: <signed-x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/38"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/38"}],"useCases":["Retrieving backup data on-demand without managing API credentials","Programmatic access to stored resources via micropayment","Agent-driven data retrieval where per-call billing is preferred over subscriptions"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can sign x402 payment challenges autonomously","Users already holding USDC on Base who want frictionless API calls"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","High-volume batch workloads where per-request pricing becomes expensive","Users without Base-network USDC or x402-compatible wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.814Z"},"updatedAt":"2026-04-22T10:32:34.508Z"}}