{"id":"1da0e16f-6ca4-4108-bd5c-33a23554f714","shortId":"qbUgS4","kind":"x402","title":"Download backup data for May 2026 via x402 micropayment on Base network.","tagline":"Download backup data for May 2026 via x402 micropayment on Base network.","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file for the period 2026-05, gated behind an x402 payment challenge. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request on the Base network. However, this specific endpoint is focused on backup file downloads. The exact contents and schema of the backup data are not documented in the available crawl material, so callers should expect an opaque JSON payload representing archived data for the specified month.\n\nThe endpoint is confirmed live: it returns a well-formed 402 challenge with x402 version 1, advertising the USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base. The payment timeout is 300 seconds. No OpenAPI spec, detailed documentation, or response schema was found beyond the landing page listing.","tags":[],"capabilities":["x402-payment","backup-download","base-network","usdc-settlement","pay-per-request","no-api-key","json-response"],"categories":["storage","data"],"synonyms":["backup download API","data export","file download endpoint","x402 backup","lowpaymentfee backup","paid data download","Base USDC API"],"warnings":["No OpenAPI or response schema available — the structure of the returned backup data is unknown","Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no useful content","The backup period '2026-05' is in the future relative to typical current dates, which may indicate test/placeholder data","The exact contents and format of the backup file are not described anywhere in the crawl material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-05/download","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/2026-05/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge, but there is no OpenAPI spec, no response schema, no documentation beyond a landing page, and the purpose of the backup data is entirely undocumented. The listing is effectively a stub with pricing and liveness confirmed.","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":"2026-04-19T15:49:08.076Z","embedding":[-0.019195557,-0.014251709,0.047576904,-0.009239197,-0.000012040138,-0.017669678,-0.017318726,0.01751709,0.027572632,-0.0791626,0.024307251,-0.029693604,-0.037078857,-0.06048584,0.0031223297,0.055541992,-0.018371582,-0.021438599,-0.06555176,-0.009918213,0.026626587,-0.03186035,0.0065994263,0.009208679,0.015388489,-0.01210022,-0.023513794,-0.00598526,0.0041999817,-0.036315918,0.008666992,-0.028076172,-0.0104904175,0.0037155151,-0.0016298294,0.012306213,-0.00000667572,-0.00605011,0.019332886,-0.031799316,0.022735596,-0.07543945,0.02078247,0.024902344,-0.013961792,-0.023223877,0.03729248,-0.029373169,0.027053833,-0.020614624,-0.032928467,-0.014762878,-0.033477783,0.010871887,0.01335907,0.0074501038,0.033294678,0.016021729,0.0075263977,0.0037555695,-0.0054779053,-0.036743164,-0.030349731,-0.021347046,0.030029297,0.042053223,-0.011566162,0.05319214,-0.0047302246,0.060760498,0.00894165,0.0637207,0.018508911,-0.018829346,-0.011619568,0.0060195923,0.01737976,0.040771484,-0.0053634644,-0.040771484,0.009811401,-0.0052223206,-0.018341064,0.0066223145,-0.004714966,-0.027389526,-0.0027198792,0.033233643,-0.0067634583,0.064453125,-0.051849365,0.013313293,-0.007888794,-0.018920898,0.024017334,-0.0061912537,-0.024139404,-0.0050239563,0.019958496,-0.005683899,-0.0050964355,-0.026290894,0.026245117,-0.047668457,0.041992188,0.032226562,0.051635742,-0.0011997223,0.0036582947,-0.0008559227,-0.049224854,0.0018501282,-0.0031032562,-0.010047913,0.013420105,-0.011627197,-0.03466797,0.0051956177,0.00015568733,0.03137207,-0.06365967,0.041229248,0.00014019012,-0.0056991577,0.027740479,-0.022949219,-0.00737381,0.01108551,-0.04437256,-0.00096321106,0.045196533,0.020751953,0.023376465,-0.05895996,-0.0017137527,0.03414917,-0.035217285,-0.01927185,-0.04547119,-0.03149414,0.02116394,-0.024215698,0.015098572,0.03881836,-0.07543945,0.023284912,-0.02067566,0.011940002,-0.013122559,-0.0026340485,-0.004398346,0.013885498,0.018432617,0.0029525757,-0.016159058,-0.028366089,-0.013374329,-0.0015687943,-0.025741577,0.020141602,-0.033203125,0.025772095,0.020385742,-0.0151901245,0.03286743,0.042022705,-0.023742676,-0.060333252,-0.09710693,-0.037139893,0.0022563934,0.0026416779,-0.0011644363,-0.0129852295,-0.016418457,-0.036071777,-0.02947998,0.008964539,0.02420044,-0.056243896,0.015609741,-0.05895996,0.038085938,-0.00856781,-0.05114746,-0.018234253,-0.04135132,0.06512451,0.0060768127,0.022399902,0.02268982,-0.003534317,0.03479004,0.022094727,-0.031433105,-0.024536133,0.028152466,-0.0496521,0.06781006,-0.0040397644,-0.015289307,-0.02204895,0.019317627,0.046936035,0.020370483,-0.012199402,-0.03050232,-0.041259766,-0.065979004,-0.022216797,0.032104492,0.016220093,-0.01953125,0.03640747,-0.028778076,-0.008560181,0.009216309,0.020202637,0.008811951,0.03451538,0.012702942,-0.015274048,0.01864624,0.035583496,-0.01586914,0.021347046,0.030273438,0.017791748,-0.00029325485,-0.020935059,0.010047913,0.024291992,-0.045898438,0.011138916,-0.0036964417,0.030456543,-0.009346008,-0.010498047,-0.0029716492,0.002861023,-0.015098572,-0.013282776,-0.0151901245,0.004627228,0.007698059,-0.01411438,-0.030273438,-0.062042236,0.02960205,0.01914978,0.020507812,-0.02130127,0.0048561096,-0.039031982,0.0059394836,-0.054351807,0.044158936,0.048461914,-0.00831604,-0.0009570122,0.020965576,-0.0077438354,-0.052947998,0.018218994,0.020431519,-0.009002686,0.0070228577,0.010047913,-0.052093506,0.011657715,0.009857178,0.030426025,0.074157715,-0.0134887695,-0.039367676,-0.0007972717,-0.018081665,-0.0027618408,-0.0134887695,0.013313293,-0.016021729,0.010757446,-0.00037527084,0.008621216,0.03152466,0.033111572,0.01889038,-0.0019950867,0.0008497238,-0.022857666,-0.03591919,0.0023040771,-0.013259888,-0.050354004,0.020477295,-0.00020503998,0.02859497,-0.031280518,0.016494751,-0.016983032,0.013725281,0.03390503,-0.04058838,-0.0262146,0.0016431808,0.0036563873,-0.0050086975,0.057495117,0.013847351,-0.0019607544,-0.04269409,0.04196167,-0.038146973,-0.026763916,0.00041937828,0.011123657,0.039764404,-0.007949829,-0.048431396,-0.057250977,-0.00932312,-0.03152466,0.023788452,0.0023899078,0.02268982,0.012306213,0.012748718,-0.0019216537,-0.025115967,-0.01953125,-0.016921997,-0.015396118,0.033966064,-0.029052734,-0.0184021,0.028427124,0.012031555,-0.031555176,0.010749817,0.027114868,-0.007675171,-0.0013694763,-0.028900146,-0.027770996,-0.009338379,-0.042236328,0.024246216,0.032043457,-0.008613586,0.043792725,-0.046875,0.00094509125,0.016830444,0.0019035339,0.023544312,-0.0069503784,-0.002954483,-0.08630371,-0.047027588,-0.018585205,-0.039245605,0.03552246,0.033294678,-0.017547607,0.055633545,-0.00843811,-0.06488037,-0.018157959,0.01927185,-0.040283203,0.015426636,0.026947021,-0.03756714,-0.0025787354,-0.02218628,0.009529114,0.013786316,0.022644043,0.027297974,0.03314209,0.06341553,0.03515625,0.0053367615,0.037994385,0.0152282715,0.043273926,-0.019866943,0.010345459,-0.016204834,-0.037475586,0.007255554,-0.00466156,-0.019500732,-0.05178833,0.032196045,0.05105591,0.07208252,0.008522034,0.016738892,0.01966858,-0.031799316,-0.0015516281,-0.045532227,-0.032714844,-0.020858765,-0.04925537,0.025802612,0.0020389557,0.00081539154,-0.043273926,0.008644104,-0.01474762,0.004825592,-0.042114258,0.055908203,0.0056419373,-0.016235352,0.064086914,-0.015312195,0.05029297,0.04425049,-0.035614014,0.019760132,0.0069122314,-0.030731201,0.0018434525,0.033203125,0.0068359375,0.004558563,-0.061645508,-0.03086853,-0.0008497238,-0.01612854,-0.018356323,-0.024993896,0.024154663,0.03643799,0.0012130737,-0.025146484,-0.018157959,0.01184082,0.013198853,-0.027267456,0.023880005,-0.029800415,0.00021231174,0.020141602,0.0211792,0.0053596497,0.009605408,0.010231018,-0.0023345947,-0.02659607,0.0067977905,0.0014877319,-0.052978516,0.0005545616,-0.037322998,0.018417358,-0.0029830933,0.03326416,0.008216858,0.042510986,0.034210205,0.042144775,-0.022216797,-0.04434204,0.026947021,-0.06427002,-0.0030269623,0.04284668,-0.021484375,-0.0098724365,0.016784668,-0.020843506,-0.033233643,-0.0119018555,-0.02079773,0.005672455,0.014801025,-0.030899048,-0.032592773,-0.06817627,-0.022003174,0.005382538,0.064331055,0.04196167,0.03768921,-0.022766113,-0.033813477,0.028778076,0.012588501,0.03479004,-0.013626099,-0.027191162,-0.01576233,-0.010688782,-0.020721436,-0.0066566467,0.046569824,-0.008743286,-0.0057678223,0.040893555,0.02180481,0.023925781,-0.0178833,-0.01209259,0.005592346,-0.018692017,0.0045280457,0.007896423,0.038116455,0.031021118,-0.035339355,-0.037719727,0.055908203,0.013534546,0.02734375,-0.03555298,0.0079574585,-0.011062622,0.02130127,0.0018482208,-0.031204224,0.0053253174,-0.0017547607,-0.04208374,-0.11932373,0.052246094,-0.007888794,0.046661377,0.015151978,-0.0062942505,0.014076233,-0.0015707016,0.021759033,0.015464783,-0.015930176,-0.03845215,-0.017730713,-0.011390686,-0.0146102905,-0.0055999756,-0.011024475,0.011131287,-0.025039673,0.025146484,-0.008872986,-0.006095886,0.023742676,0.015853882,-0.005531311,0.0071754456,-0.0047187805,0.013046265,0.01335907,0.0010433197,-0.030548096,0.017944336,0.0061912537,0.01826477,0.017349243,0.049713135,0.032348633,-0.01638794,-0.0018558502,0.006866455,-0.014770508,-0.02267456,0.011619568,0.0029735565,0.016311646,0.008552551,-0.03805542,0.013175964,0.021652222,-0.051879883,-0.03225708,-0.004261017,0.006072998,-0.035095215,0.023773193,0.0016107559,0.048675537,-0.0095825195,-0.0053596497,0.0003695488,0.03652954,0.018508911,0.0036811829,-0.008583069,0.013244629,-0.025894165,0.0069122314,0.020568848,0.009605408,0.017944336,-0.00843811,0.008544922,-0.016204834,-0.015823364,-0.020492554,-0.016571045,0.025253296,0.016189575,-0.0039863586,0.036346436,0.014923096,0.008277893,0.012962341,0.019042969,0.016952515,-0.002916336,-0.022064209,0.01663208,0.04171753,0.008766174,-0.01663208,0.01020813,0.012145996,0.040924072,-0.047302246,0.0047798157,-0.009986877,0.013725281,-0.040161133,-0.04815674,-0.038391113,-0.029251099,0.03881836,-0.014099121,-0.009048462,0.024459839,-0.0008716583,-0.0073509216,0.03186035,0.029205322,-0.0023822784,-0.025177002,-0.07043457,-0.0058784485,0.0010528564,-0.021072388,-0.03591919,0.0033054352,-0.0060157776,-0.028900146,-0.0027599335,-0.036499023,0.0057792664,-0.023727417,0.0014467239,0.051696777,0.0048332214,0.016784668,-0.019805908,0.006679535,0.007282257,0.0072135925,0.044189453,-0.043640137,0.011787415,0.008857727,0.009719849,-0.006679535,0.013145447,0.053131104,0.03253174,0.024368286,0.029327393,-0.03466797,0.028320312,-0.03149414,-0.00060367584,-0.03161621,-0.049102783,0.0056381226,-0.013000488,0.010673523,0.031219482,-0.019821167,-0.023742676,-0.051483154,-0.050689697,0.013839722,-0.046173096,0.020309448,0.03692627,0.038635254,-0.028503418,0.005744934,-0.00015544891,-0.016601562,-0.023529053,0.020141602,0.026641846,0.036132812,0.021697998,0.016555786,-0.008895874,-0.022262573,-0.033599854,-0.003501892,-0.025650024,-0.05819702,-0.00819397,-0.014465332,-0.015731812,-0.009590149,-0.039093018,-0.0064430237,0.0016918182,-0.048095703,-0.006855011,-0.0009965897,0.009986877,0.0068244934,0.014198303,-0.0043945312,-0.0061187744,-0.0107040405,0.02772522,0.0014343262,-0.043029785,-0.048553467,0.016708374,0.024414062,0.0018854141,-0.008354187,-0.06677246,0.0019664764,-0.026550293,-0.057250977,0.0063667297,0.005996704,-0.009819031,-0.03010559,0.010139465,-0.042236328,0.012832642,-0.012001038,-0.021896362,-0.0041885376,0.00894165,0.0052604675,-0.009262085,0.028198242,-0.010955811,-0.013710022,-0.01878357,0.031829834,0.008956909,0.007801056,0.008255005,0.032287598,0.0016908646,-0.028640747,-0.0037117004,-0.03338623,0.013786316,0.008003235,0.0066108704,-0.0082092285,0.017578125,0.0049209595,-0.019500732,-0.051940918,0.01777649,0.079833984,0.007156372,-0.0206604,-0.0027332306,-0.014350891,-0.00274086,0.037750244,-0.009521484,0.012908936,-0.016220093,0.018295288,-0.009223938,0.037200928,0.024749756,0.015197754,0.022857666,-0.03086853,0.0030574799,-0.0052833557,0.0071487427,-0.08868408,-0.038391113,-0.04473877,-0.013870239,0.0009288788,-0.005508423,0.023757935,0.0013608932,-0.017028809,-0.06762695,-0.0066108704,0.03741455,0.005634308,-0.003112793,-0.0043144226,0.025665283,0.006641388,-0.008468628,-0.04257202,0.011711121,-0.03253174,-0.022888184,-0.04928589,0.0345459,0.017852783,0.012023926,0.02835083,0.0044441223,0.0072746277,-0.034851074,0.011917114,-0.041870117,0.035217285,-0.008300781,-0.00945282,0.0021743774,0.0066604614,0.031097412,-0.02885437,0.020736694,0.010757446,0.019760132,0.016967773,0.018753052,0.050720215,-0.053955078,0.008682251,0.0021800995,0.012741089,0.018447876,-0.0395813,0.05328369,0.0054779053,-0.0009794235,0.011566162,-0.01878357,-0.001083374,-0.023117065,-0.030029297,-0.008987427,0.00007855892,0.0036621094,0.0040397644,-0.0063819885,0.014724731,0.022384644,-0.005256653,-0.005130768,-0.010612488,-0.0066566467,0.04373169,-0.010467529,0.005580902,-0.015464783,0.037902832,0.034484863,0.041870117,0.013175964,-0.025314331,-0.019317627,0.015487671,-0.024093628,-0.008094788,0.027877808,0.015670776,0.005493164,0.01826477,0.0065345764,-0.025527954,-0.0033893585,-0.015716553,-0.003932953,0.0059127808,-0.027267456,-0.0076065063,0.027801514,0.022720337,0.0035495758,-0.021621704,-0.011711121,-0.018432617,-0.024749756,-0.023651123,-0.01398468,0.026321411,0.0066604614,-0.02470398,0.0063972473,-0.01033783,0.031082153,-0.024627686,-0.024765015,0.03881836,0.043029785,-0.013175964,-0.028869629,0.00095939636,0.0011501312,-0.019515991,0.0056114197,-0.032165527,0.016189575,0.049713135,0.0062942505,0.03277588,0.019073486,0.014076233,-0.0027866364,-0.0070762634,0.0016078949,0.022262573,-0.005748749,0.033966064,-0.03793335,0.007698059,0.014389038,-0.013633728,-0.02557373,0.008201599,-0.021118164,0.024291992,-0.001335144,0.01939392,0.03729248,0.0024967194,0.0066184998,-0.039520264,-0.0050964355,-0.006412506,-0.03881836,-0.017944336,0.004627228,0.0040397644,0.0056991577,0.016906738,-0.016845703,0.029205322,-0.037109375,0.050445557,-0.014434814,0.008766174,-0.037200928,-0.016708374,-0.010414124,0.012374878,-0.01939392,0.013145447,-0.0072250366,0.02722168,0.025497437,0.004749298,-0.0014810562,0.0109939575,0.027542114,-0.030578613,-0.010940552,0.01940918,-0.02671814,0.029724121,-0.021652222,0.050079346,0.059539795,0.008361816,0.033203125,0.023605347,0.03729248,0.002008438,0.014198303,-0.01953125,0.009361267,-0.0036087036,0.024093628,0.0031700134,0.040893555,-0.011306763,0.0053977966,0.044921875,0.022384644,-0.0008263588,0.025222778,0.068725586,0.019958496,0.0016622543,0.02229309,-0.017044067,-0.040496826,-0.011680603,-0.021713257,0.031204224,0.011367798,0.028701782,0.029205322,0.016906738,-0.01197052,0.053131104,-0.031341553,-0.02470398,0.052001953,0.049804688,0.0024852753,-0.011802673,-0.02078247,-0.00041365623,-0.04269409,-0.016860962,0.024002075,0.0035972595,-0.0103302,-0.00762558,0.013313293,-0.0020656586,-0.010765076,0.013198853,0.0015144348,-0.030776978,0.03137207,0.004558563,0.020095825,0.027297974,0.0042419434,0.018295288,-0.022415161,0.005203247,-0.010887146,0.02519226,0.00016009808,-0.020751953,0.00019037724,0.017364502,0.03451538,0.03363037,-0.0079574585,0.014663696,0.032958984,0.007873535,0.009124756,0.04446411,0.0016822815,0.040039062,0.037719727,0.013946533,0.02281189,-0.018310547,0.000014483929,0.00522995,0.008041382,0.014198303,-0.0036182404,0.028244019,-0.02468872,0.034820557,-0.0039253235,-0.01096344,0.03112793,0.029724121,-0.016342163,0.016967773,-0.01525116,-0.008911133,-0.0017204285,0.01751709,0.016494751,-0.014221191,0.0050697327,-0.0034866333,0.031951904,-0.009811401,0.006778717,0.005252838,-0.021911621,-0.013725281,0.018554688,-0.06390381,-0.006580353,0.035736084,-0.0082092285,-0.03112793,0.025115967,0.009109497,-0.020614624,0.022033691,-0.0055656433,-0.0029125214,-0.03265381,0.046051025,0.036193848,0.017242432,-0.018356323,-0.030151367,-0.008079529,0.037353516,-0.004070282,-0.0057907104,-0.021530151,-0.022964478,-0.0075950623,0.011528015,-0.016082764,0.007850647,-0.020248413,0.002922058,0.014587402,0.022994995,0.013549805,0.017333984,-0.015914917,0.0024089813,0.0063323975,0.014526367,0.013687134,-0.008796692,-0.01171875,0.01701355,-0.027618408,0.01512146,0.027801514,0.003967285,0.031585693,0.008354187,-0.024002075,0.0051841736,-0.030395508,0.02432251,-0.008377075,0.0077438354,0.00970459,0.028579712,-0.026443481,-0.04208374,0.011222839,-0.028274536,-0.022537231,0.0048561096,0.0032653809,0.015548706,0.021270752,0.058746338,0.016143799,-0.009559631,0.05810547,-0.009811401,0.03656006,-0.023727417,-0.010437012,0.02267456,0.017623901,0.041015625,0.0075950623,0.015426636,-0.02960205,0.029129028,0.020141602,0.025772095,0.029144287,0.005897522,-0.016906738,0.036895752,-0.0231781,0.022781372,0.026565552,0.013763428,0.023651123,-0.028427124,-0.0073051453,0.0099105835,-0.002231598,-0.016143799,0.033966064,-0.009750366,-0.012802124,-0.018569946,-0.023101807,0.017929077,-0.009124756,-0.012763977,-0.000682354,-0.0049743652,0.015113831,-0.009178162,-0.017547607,0.024765015,-0.0045814514,-0.047912598,0.004699707,0.005142212,0.0178833,-0.03656006,0.023498535,0.039520264,0.023712158,0.0010900497,0.03579712,-0.017166138,0.029693604,-0.01133728,0.0035629272,0.05529785,0.009597778,-0.010047913,0.021713257,0.008758545,-0.008636475,0.0019035339,0.03704834,-0.014633179,0.02406311,-0.0016040802,0.001531601,-0.0012369156,0.012771606,-0.003780365,-0.0034503937,-0.014709473,-0.00057411194,-0.0014648438,0.0039634705,0.0019140244,0.016723633,0.011581421,-0.0129852295,0.038879395,0.039093018,0.020339966,-0.046936035,0.0030498505,-0.0039138794,0.008743286,-0.006389618,-0.0178833,0.012748718,-0.0289917,0.0015087128,0.029953003,0.004901886,0.013557434,-0.019515991,-0.0073928833,0.014511108,0.019866943,0.019439697,0.003780365,-0.008872986,-0.009147644,-0.032043457,0.0018949509,-0.017944336,-0.00011307001,0.008666992,0.049316406,-0.024993896,-0.025741577,0.029174805,0.000620842,0.011787415,-0.00843811,0.037628174,0.017578125,0.0069007874,0.0071792603,-0.00026154518,0.045776367,-0.011711121,-0.036010742,-0.014785767,0.02104187,0.03930664,-0.00045084953,-0.025772095,0.0011301041,0.019088745,0.009971619,0.026519775,-0.0020503998,0.052978516,0.005130768,-0.020523071,-0.038604736,0.0053596497,-0.0116119385,-0.027267456,0.018096924,-0.025314331,-0.009010315,0.0018548965,0.021728516,-0.011474609,-0.04714966,-0.018508911,-0.03010559,-0.011184692,0.018432617,-0.0104599,0.017471313,-0.01626587,-0.01361084,0.04385376,-0.02532959,-0.048614502,-0.020126343,0.003358841,-0.025741577,-0.048583984,0.020599365,-0.000641346,-0.0031547546,-0.031204224,0.019454956,0.001244545,0.0059165955,-0.006340027,-0.02217102,0.009643555,0.010063171,0.0041503906,0.008033752,0.0017690659,-0.02746582,-0.019836426,-0.019241333,0.01386261,-0.013664246,0.03881836,0.007873535,0.027694702,0.039154053,-0.0345459,-0.0065307617,0.001156807,-0.011627197,0.00566864,-0.011680603,-0.024337769,0.019805908,0.035858154,-0.012077332,-0.013824463,0.058898926,-0.0115737915,-0.027450562,0.034820557,0.018218994,-0.009429932,0.024551392,0.018325806,0.0030345917,0.0016450882,-0.023086548,-0.010520935,0.004032135,0.017196655,-0.013458252,-0.007019043,-0.007648468,0.001698494,-0.01739502,-0.0024776459,0.031311035,0.0103302,-0.02015686,0.020507812,0.0033340454,0.019058228,-0.004348755,-0.048950195,0.016464233,0.06677246,-0.0012998581,-0.008201599,0.009719849,0.0016078949,-0.0501709,0.00970459,-0.0039482117,0.0011310577,-0.036468506,-0.00919342,-0.02029419,0.019760132,-0.011680603,0.008590698,-0.018508911,0.029327393,0.0013170242,-0.018585205,0.007865906,0.02079773,0.008766174,-0.03491211,-0.002506256,-0.0021629333,0.0017690659,-0.016052246,0.0107803345,-0.052886963,-0.025894165,-0.010795593,-0.031097412,0.0065193176,0.017196655,-0.0025310516,-0.007686615,-0.0018558502,-0.009124756,-0.009246826,0.01637268,-0.0096588135,-0.011047363,0.022583008,0.021240234,-0.010108948,0.014007568,-0.018417358,-0.008285522,0.0047073364,0.00957489,0.021820068,-0.010673523,0.021072388,-0.008140564,-0.039245605,0.009407043,-0.006778717,0.021133423,-0.02684021,-0.00793457,-0.005302429,-0.01499939,0.0095825195,-0.0011510849,-0.019470215,0.0054473877,-0.023895264,-0.030853271,0.003686905,-0.0021362305,0.021987915,-0.007369995,0.033843994,-0.013572693,-0.011581421,-0.0051460266,-0.012870789,-0.008956909,-0.007965088,0.01473999,-0.007965088,-0.0037631989,0.010025024,-0.014160156,-0.028442383,-0.009132385,0.018676758,-0.009468079,0.017669678,0.046875,0.023101807,0.038635254,-0.00096702576,0.037261963,-0.017913818,-0.0053215027,0.020874023,0.011856079,0.04940796,-0.010154724,-0.006717682,-0.00116539,0.008491516,-0.019058228,0.000626564,0.018127441,-0.028121948,-0.066833496,0.010734558,-0.015602112,0.008758545,-0.0041770935,0.011894226,-0.031219482,0.00466156,-0.045013428,-0.0018901825,-0.04714966,0.013381958,0.028045654,-0.0025672913,0.020950317,-0.001414299,-0.030227661,0.011520386,0.022903442,-0.015350342,-0.032043457,-0.011795044,-0.012825012,0.000177145,0.017807007,0.02017212,-0.014183044,0.016082764,0.017486572,-0.014533997,-0.007598877,-0.008720398,0.020080566,0.004802704,-0.011077881,-0.045898438,0.022262573,0.015548706,-0.018981934,0.010192871,0.0003695488,0.02670288,0.031280518,0.009284973,0.012138367,-0.003145218,-0.040252686,0.039123535,0.01096344,0.013633728,-0.009353638,-0.010124207,-0.05203247,-0.009124756,0.012588501,-0.01776123],"createdAt":"2026-04-18T19:59:13.725Z","updatedAt":"2026-04-22T13:32:03.005Z","lastSeenAt":"2026-04-22T13:32:03.005Z","tsv":"'-05':40 '0.02':71,129 '000':75 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':200 '1':194 '20':74 '2026':6,18,39 '300':207 '402':189 '6':79 'Base USDC API' 'accept':49 'access':30 'advertis':195 'ai/ml':119 'analyt':118 'api':82,115 'application/json':54 'archiv':172 'asset':198 'attach':91 'avail':160 'backup':2,14,34,143,153 'backup download API' 'backup-download' 'base':11,23,61,76,134,202 'base-network' 'behind':42 'beyond':219 'broader':108 'call':114 'caller':89,164 'challeng':46,190 'coin':66 'confirm':181 'content':55,148 'contract':199 'cost':69 'crawl':161 'data':3,15,117,122,154,173 'data export' 'decim':80 'detail':212 'document':157,213 'download':1,13,33,145 'endpoint':26,48,139,179 'exact':147 'expect':166 'file':35,144 'file download endpoint' 'finance/web3':121 'focus':141 'form':188 'found':218 'gate':41 'header':96 'host':106 'howev':136 'infer':120 'infrastructur':124 'json':169 'json-response' 'key':83 'land':221 'limit':86 'list':223 'live':182 'lowpaymentfee backup' 'lowpaymentfee.com':28,105 'materi':162 'may':5,17 'micropay':9,21 'month':177 'network':12,24,62,135 'no-api-key' 'opaqu':168 'openapi':210 'page':222 'paid data download' 'pay':112 'pay-per-cal':111 'pay-per-request' 'payload':170 'payment':45,56,95,101,204 'per':72,113,130 'period':38 'post':50 'price':127 'proof':102 'provid':29,104 'rate':85 'repres':171 'request':51,73,131 'requir':88 'respons':215 'return':53,184 'schema':150,216 'second':208 'settl':58 'simpli':90 'span':116 'spec':211 'specif':138 'specifi':176 'suit':109 'timeout':205 'unit':77 'usd':65 'usdc':64,197 'usdc-settlement' 'use':63 'util':125 'valid':99 'version':193 'via':7,19 'well':187 'well-form':186 'x':94 'x-payment':93 'x402':8,20,44,100,192 'x402 backup' 'x402-payment'","prices":[{"id":"6d37b1a7-722e-4af6-94a2-652660fd46b0","listingId":"1da0e16f-6ca4-4108-bd5c-33a23554f714","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/2026-05/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:13.725Z"}],"sources":[{"listingId":"1da0e16f-6ca4-4108-bd5c-33a23554f714","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-05/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:13.725Z","lastSeenAt":"2026-04-22T13:32:03.005Z"}],"details":{"listingId":"1da0e16f-6ca4-4108-bd5c-33a23554f714","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-05/download \\\n  -H \"X-PAYMENT: <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 402 challenge with x402 version 1 on POST, advertising USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-05/download"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units, USDC 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-05/download"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"}],"useCases":["Downloading archived backup data for May 2026","Programmatic retrieval of periodic data snapshots via micropayment","Agent-driven data archival workflows that pay per download"],"bestFor":["Agents needing on-demand backup file retrieval without API key management","Workflows requiring pay-per-use data downloads settled in USDC on Base","Automated systems that fetch periodic data exports"],"notFor":["Users needing free or subscription-based backup access","Scenarios requiring detailed schema documentation before integration","High-frequency bulk downloads where per-request pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.644Z"},"updatedAt":"2026-04-22T13:32:03.005Z"}}