{"id":"e17c7b35-e7d6-4225-b9d9-1a77ddbde777","shortId":"LUYdsP","kind":"x402","title":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at `/api/v1/nfts/99` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint appears to serve NFT-related data (resource ID 99), though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe x402 challenge advertises a `maxAmountRequired` of 20,000 base units. Since USDC uses 6 decimals, this converts to $0.02 per request — consistent with the site-wide flat pricing of $0.02/request. The platform emphasizes no API keys, no rate limits, and instant access; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts POST requests and returns `application/json`.\n\nThe broader lowpaymentfee.com platform lists roughly 16 endpoints across four categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). No OpenAPI schema, detailed request/response documentation, or usage examples were found in the crawl. The NFT endpoint specifically (`/api/v1/nfts/99`) is not listed on the homepage's catalog, so its purpose and response format remain unclear. Treat this as a lightly documented, live x402 endpoint with confirmed payment challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","json-response"],"categories":["web3","nft","data"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","pay-per-call NFT","Base USDC API","lowpaymentfee","402 payment API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/nfts/99 path is not listed on the provider's homepage catalog — its purpose and data source are unclear","No example responses or request body schemas found in crawl","The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/99","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/nfts/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live with a valid x402 402 challenge and confirmed pricing, but there is no OpenAPI schema, no request/response documentation, and the specific NFT endpoint is not even listed on the provider's homepage. The response format and input parameters are entirely unknown.","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":"2026-04-21T23:47:31.543Z","embedding":[-0.031555176,-0.026855469,0.04550171,0.0038414001,0.026412964,-0.032348633,-0.018249512,0.017044067,0.03466797,-0.06188965,0.035705566,-0.022766113,-0.0496521,-0.05734253,-0.02758789,0.01838684,-0.004135132,-0.012588501,-0.04928589,0.025177002,0.044769287,-0.012496948,-0.01637268,0.016723633,-0.0046157837,-0.0043411255,0.008796692,0.011459351,-0.00699234,-0.017349243,0.013328552,-0.024810791,-0.015312195,0.0015306473,-0.0053901672,-0.00082588196,0.0060157776,0.032409668,0.0015439987,-0.016845703,-0.0046577454,-0.05871582,0.014030457,-0.013587952,-0.040283203,-0.00806427,0.0074882507,-0.03729248,-0.011199951,0.0015535355,-0.033294678,0.002626419,-0.014961243,0.003484726,-0.004207611,0.032104492,-0.0016889572,0.0022964478,0.003921509,0.010643005,-0.008239746,-0.07342529,-0.0015411377,-0.004207611,0.022994995,0.050109863,-0.017318726,0.039245605,-0.0064811707,0.09375,0.011199951,0.053497314,0.031097412,0.0054779053,0.0058403015,-0.025863647,-0.008270264,0.03878784,-0.017593384,-0.040924072,-0.011955261,-0.015312195,-0.064331055,-0.03503418,-0.0032253265,-0.061462402,-0.014480591,0.0256958,-0.038208008,0.034698486,-0.08227539,-0.011680603,-0.012451172,0.015342712,-0.028213501,-0.023086548,-0.018463135,0.009757996,0.017150879,0.01348114,-0.023590088,-0.024658203,0.029464722,0.014511108,0.045654297,0.06088257,0.010284424,0.0073013306,-0.0007843971,-0.02810669,-0.0068893433,0.014076233,0.006793976,-0.0060272217,0.013572693,0.00017249584,-0.03491211,0.036590576,-0.008056641,0.036865234,-0.03201294,0.05783081,0.005458832,0.00447464,-0.000051498413,-0.028839111,-0.009490967,0.009506226,-0.015472412,-0.0025596619,0.03390503,-0.002614975,0.024017334,-0.02243042,-0.040802002,0.0032234192,-0.018112183,-0.019424438,-0.058410645,-0.013389587,0.022354126,-0.027328491,0.018051147,0.043823242,-0.078430176,0.009315491,-0.0284729,0.015838623,-0.02168274,-0.0061416626,0.012374878,0.033203125,0.001830101,-0.02243042,-0.020141602,-0.044555664,0.0026569366,0.02796936,-0.002828598,0.028335571,-0.017181396,0.022994995,0.03942871,0.015312195,0.031707764,0.050811768,-0.007881165,-0.08294678,-0.07067871,-0.0015764236,-0.0041999817,-0.017669678,-0.022659302,0.0069732666,-0.011878967,-0.06311035,-0.013771057,-0.0014028549,0.01374054,-0.050476074,-0.0041275024,-0.06549072,-0.0003156662,-0.0009098053,-0.046173096,-0.01966858,-0.03378296,0.049835205,0.015571594,0.02279663,0.030883789,0.0041122437,0.04916382,0.027618408,-0.015472412,-0.027175903,0.027191162,-0.021072388,0.036895752,-0.0067214966,0.03564453,0.00844574,0.02230835,0.06689453,-0.000017285347,-0.015426636,-0.0072135925,-0.06677246,-0.0234375,-0.021606445,0.014350891,0.022521973,-0.015586853,0.017120361,-0.034118652,-0.023101807,0.00048089027,0.020080566,0.012435913,0.055541992,0.0055732727,0.016983032,0.031402588,0.024765015,-0.046417236,0.033050537,0.022323608,0.014778137,-0.010276794,-0.040252686,0.022079468,0.028762817,-0.016281128,-0.004962921,-0.042755127,0.008392334,-0.025161743,-0.011787415,0.0033664703,0.006839752,-0.026260376,-0.044036865,-0.003982544,0.012390137,0.0010137558,-0.034698486,-0.05444336,-0.06109619,0.038146973,0.06341553,0.021972656,0.0036697388,0.0015563965,-0.03579712,-0.013648987,-0.0848999,0.0574646,0.07110596,-0.009712219,-0.0018234253,0.039093018,-0.01701355,-0.046173096,-0.009971619,-0.013946533,-0.027435303,-0.024993896,0.015350342,-0.041625977,0.018173218,0.026931763,0.01725769,0.04559326,-0.05001831,-0.059783936,-0.0018033981,-0.009757996,0.014587402,-0.03237915,-0.03125,0.009216309,0.030181885,0.031143188,0.016983032,-0.0046081543,-0.012107849,0.011199951,0.013885498,0.014167786,-0.009765625,-0.020324707,0.01940918,0.00349617,-0.05621338,0.009666443,-0.009483337,0.047698975,-0.05407715,0.04095459,-0.014846802,0.0016117096,0.044067383,-0.00012791157,-0.045196533,-0.008026123,0.012168884,0.038970947,0.052368164,0.008514404,-0.0035171509,-0.009811401,0.07147217,-0.028320312,-0.020523071,0.00041532516,0.027954102,0.045318604,0.025619507,-0.046569824,-0.029144287,0.003780365,-0.02470398,0.040252686,-0.01889038,0.021606445,-0.012664795,0.006374359,-0.012901306,-0.015167236,-0.020019531,0.017074585,-0.0054893494,0.016098022,-0.016052246,-0.0054359436,0.007835388,0.019500732,-0.018096924,0.016082764,0.038482666,0.0206604,-0.021438599,-0.01499939,-0.04534912,-0.03237915,-0.0026474,0.01348114,0.016983032,0.0045776367,0.041625977,-0.041137695,-0.0034217834,0.017456055,0.009239197,0.0390625,0.0009498596,-0.018234253,-0.06793213,-0.05630493,-0.02748108,-0.04034424,0.036102295,0.025604248,0.0072669983,0.05154419,-0.0024757385,-0.029174805,-0.029174805,0.0289917,-0.06414795,-0.015457153,0.05126953,-0.010467529,-0.024490356,0.037078857,0.0115737915,0.022583008,0.03829956,0.018005371,0.007736206,0.07244873,0.028076172,0.017089844,-0.006729126,0.029037476,0.026306152,-0.0015354156,-0.0256958,-0.03250122,-0.04135132,0.036254883,-0.035064697,-0.03643799,-0.07537842,0.046722412,0.024398804,0.08166504,0.008422852,0.0070266724,0.055541992,-0.01625061,0.017837524,-0.02659607,-0.02571106,-0.039978027,-0.029953003,0.027633667,-0.0045318604,-0.0019111633,-0.028335571,0.014480591,0.025161743,0.01071167,-0.029891968,0.053253174,-0.001253128,-0.004360199,0.022125244,-0.005378723,0.052703857,0.0647583,-0.037872314,0.03024292,-0.005836487,-0.030838013,-0.0074310303,0.020584106,-0.0011777878,-0.01499939,-0.06756592,-0.028076172,0.0017633438,-0.00957489,-0.04699707,-0.013908386,0.002298355,0.030426025,0.03253174,-0.0011138916,-0.02420044,0.00079488754,-0.0006995201,-0.045135498,0.0013513565,-0.048919678,0.0158844,0.03161621,-0.011054993,0.009963989,-0.00086545944,0.0074424744,-0.0149383545,0.040924072,-0.0032691956,0.004108429,-0.0423584,0.023345947,-0.017120361,0.027282715,0.008018494,0.040252686,0.032958984,0.03970337,0.027770996,0.020492554,-0.017913818,-0.0569458,0.028503418,-0.03289795,0.0027217865,0.019592285,-0.02268982,0.019592285,-0.0041236877,-0.036743164,-0.021057129,0.016998291,-0.021408081,0.0055618286,0.030136108,-0.031280518,-0.023406982,-0.052947998,-0.033721924,0.002067566,0.051483154,0.030914307,0.028152466,-0.038757324,-0.0158844,0.019058228,0.00484848,0.03036499,-0.014549255,-0.010986328,-0.021957397,-0.025222778,-0.022872925,-0.022613525,0.03552246,-0.010246277,-0.01676941,0.021621704,-0.0035629272,0.008071899,-0.00057792664,-0.0008416176,0.02532959,-0.024536133,0.029846191,-0.00007212162,0.0423584,0.0045700073,-0.009048462,-0.042175293,0.052459717,-0.007331848,0.044189453,-0.04953003,0.012306213,-0.003194809,0.025161743,-0.00053691864,-0.021392822,0.0008716583,0.0035324097,-0.0435791,-0.073913574,0.04232788,0.011108398,0.028411865,0.02079773,0.012161255,0.04547119,-0.01878357,-0.011329651,0.02748108,-0.016799927,-0.012634277,-0.03326416,-0.033569336,-0.039031982,-0.01272583,-0.0206604,0.0231781,0.0026073456,0.014183044,0.0027046204,-0.03665161,0.0060920715,0.005973816,-0.008728027,0.019714355,-0.003768921,0.016799927,0.05368042,0.01499939,-0.04498291,0.019958496,0.008621216,-0.0005636215,-0.0071640015,0.049102783,0.043273926,-0.0048103333,-0.006767273,-0.002210617,0.0059013367,-0.026138306,-0.01600647,0.0079422,0.014427185,0.01574707,-0.03277588,0.000023245811,0.016159058,-0.03326416,-0.01574707,0.00831604,0.029663086,-0.036132812,0.017669678,0.01789856,0.047668457,-0.02947998,-0.004650116,0.008964539,0.039367676,0.018066406,-0.004459381,-0.008880615,0.013366699,-0.00881958,0.008201599,0.0128479,-0.027557373,0.00856781,0.009468079,0.01689148,0.014015198,0.004589081,-0.020004272,-0.032684326,-0.008987427,0.0049438477,-0.035217285,0.038513184,0.017333984,0.036499023,-0.006793976,0.010375977,0.010368347,-0.015312195,-0.017578125,-0.006061554,0.023986816,-0.009277344,0.0049209595,0.0063667297,0.021255493,0.01398468,-0.057159424,-0.013366699,0.009056091,0.017333984,-0.02468872,-0.044921875,-0.02053833,-0.033447266,0.03111267,0.006954193,0.0030269623,0.025924683,0.00044202805,-0.006465912,0.011665344,0.007583618,-0.00605011,-0.01637268,-0.046813965,-0.009712219,-0.0026779175,0.0018577576,-0.022064209,0.0028972626,-0.023223877,-0.029541016,0.007358551,-0.028656006,-0.0044021606,-0.0046806335,0.0066070557,0.025939941,-0.008056641,0.013519287,-0.016204834,-0.03878784,-0.013809204,0.00004118681,0.03010559,-0.045318604,0.007663727,-0.015548706,0.0035820007,-0.0053367615,0.0033092499,0.03010559,0.034240723,0.0037155151,0.03265381,-0.034210205,0.04031372,-0.014289856,0.015213013,0.00018715858,-0.026504517,-0.008453369,-0.02029419,-0.0061416626,0.03955078,-0.015899658,-0.0004234314,-0.021240234,-0.048095703,-0.017578125,-0.058929443,0.023345947,0.029296875,0.0362854,-0.017059326,0.0010471344,0.012336731,0.0057296753,-0.013282776,0.011993408,-0.0040740967,0.0154800415,0.022262573,0.0017433167,-0.040252686,-0.03543091,0.002166748,0.0031166077,-0.051574707,-0.054351807,-0.023773193,0.003917694,0.001408577,0.024383545,-0.016586304,-0.028579712,-0.0023002625,-0.027252197,0.023010254,-0.0022907257,0.011917114,0.024780273,-0.02758789,0.007888794,0.010498047,-0.014015198,0.020858765,0.03265381,-0.0038967133,-0.03805542,0.0007648468,0.026382446,0.018173218,-0.009643555,-0.021697998,-0.0010929108,-0.032073975,-0.05606079,0.013038635,0.000269413,-0.0006804466,-0.005077362,-0.0077934265,-0.04534912,0.0060577393,-0.034820557,-0.000007927418,0.0155181885,-0.0050735474,0.009849548,0.007865906,0.004486084,-0.019943237,-0.014770508,-0.02998352,0.014511108,0.010368347,-0.0012016296,0.025878906,0.035308838,-0.0047454834,-0.012420654,-0.00374794,-0.008705139,0.015670776,-0.024520874,0.000022411346,-0.013122559,0.021118164,0.006149292,-0.019119263,-0.031402588,0.0032348633,0.054595947,-0.0039138794,-0.0035171509,0.0056381226,-0.00089788437,0.013290405,0.053863525,-0.04095459,-0.001241684,-0.021820068,0.024490356,-0.01423645,0.008514404,-0.0040779114,0.029464722,-0.017807007,-0.044921875,-0.0016670227,-0.0026302338,-0.0059814453,-0.055847168,-0.0289917,-0.062805176,0.015625,-0.022994995,-0.027282715,-0.0019207001,0.015930176,-0.030151367,-0.08282471,-0.0076446533,0.061462402,0.0041007996,0.021713257,-0.0011529922,0.02973938,0.036193848,-0.022705078,-0.001964569,0.018356323,-0.026519775,-0.011291504,-0.019607544,0.04559326,-0.005138397,-0.01727295,0.018325806,0.009162903,0.012573242,-0.01789856,0.027282715,-0.021499634,-0.0036563873,-0.00491333,0.015701294,-0.021484375,-0.029815674,0.038330078,-0.05807495,0.03552246,0.0015478134,0.011856079,0.0063819885,0.025878906,0.04043579,-0.051818848,-0.0053100586,0.033111572,0.018493652,0.052520752,-0.014511108,0.026412964,0.0007376671,-0.0018787384,-0.0019989014,-0.03189087,-0.01928711,-0.043548584,-0.01889038,0.021514893,0.004219055,-0.0076293945,-0.020568848,0.011856079,0.023712158,0.022537231,-0.007259369,-0.02178955,-0.018798828,-0.042755127,0.022033691,0.007144928,-0.009597778,0.0054244995,0.023788452,0.037322998,0.028625488,0.006011963,-0.022445679,0.0026817322,0.015426636,-0.006072998,-0.004562378,0.031173706,0.016830444,0.026321411,0.02267456,0.01663208,-0.03729248,-0.02810669,-0.0040245056,-0.02571106,0.0032844543,-0.004459381,0.0005393028,0.009124756,0.011672974,-0.006088257,-0.040008545,0.0076065063,-0.039611816,-0.019241333,0.011764526,-0.0040779114,0.022659302,0.012969971,-0.01663208,0.0004208088,-0.007926941,0.038330078,0.0008354187,-0.020187378,0.03778076,0.030807495,0.009742737,-0.024276733,-0.000012397766,-0.01977539,-0.019470215,0.0006928444,-0.012237549,0.015068054,0.03781128,-0.011367798,0.003780365,-0.006793976,0.028549194,-0.007835388,0.016708374,0.010040283,0.011421204,-0.019882202,0.04550171,-0.04498291,0.021194458,0.0075531006,0.008773804,-0.0013370514,-0.0107040405,-0.025970459,0.028808594,0.0054740906,0.013420105,0.036956787,-0.009933472,0.022232056,-0.02784729,-0.03036499,-0.0042877197,-0.018310547,-0.01423645,0.0071640015,-0.016845703,0.0071754456,0.019592285,-0.017349243,0.023406982,-0.025421143,0.0036563873,0.001156807,-0.01914978,-0.011627197,-0.024841309,-0.001958847,-0.020385742,-0.025405884,0.01890564,-0.008720398,0.053253174,0.046691895,-0.0023651123,0.024642944,0.01940918,0.020553589,-0.038848877,-0.03540039,0.009109497,-0.014549255,0.02947998,-0.026748657,0.044555664,0.04095459,0.023605347,0.049682617,0.020645142,0.033599854,0.0068969727,0.013664246,-0.016708374,0.015716553,-0.03186035,0.021118164,-0.01739502,0.055999756,-0.030761719,0.005104065,0.010726929,0.028915405,-0.017913818,0.01134491,0.052124023,0.027694702,-0.0049057007,0.045013428,0.000020623207,-0.029541016,-0.01902771,-0.021087646,0.045135498,0.013977051,0.025177002,0.026290894,0.017166138,-0.0052719116,0.02507019,-0.023742676,-0.023590088,0.04284668,0.034210205,-0.01689148,-0.012680054,-0.006252289,-0.00497818,-0.04800415,-0.0050849915,0.018966675,-0.0019836426,0.018692017,-0.00995636,-0.0025997162,-0.013244629,0.014465332,-0.0032653809,0.009628296,-0.018981934,0.03378296,0.02456665,0.0038051605,0.024719238,0.0038375854,0.020751953,-0.022781372,-0.021987915,0.011978149,0.026062012,-0.005130768,0.0026931763,0.033599854,0.01398468,0.038482666,0.021347046,-0.022506714,-0.016113281,0.01838684,0.013427734,-0.0015954971,0.047973633,0.02458191,0.022705078,0.038146973,0.023712158,0.014717102,-0.03503418,0.01525116,-0.014457703,0.006134033,-0.006214142,-0.003791809,0.02520752,-0.011810303,0.028396606,-0.0010843277,-0.009918213,0.023483276,0.019424438,-0.0018749237,-0.020751953,0.014015198,0.0118637085,-0.0140686035,-0.00052309036,0.0056648254,-0.009773254,0.02168274,0.014846802,0.048431396,-0.0096206665,0.04284668,0.007843018,-0.013267517,-0.017837524,0.015625,-0.036743164,-0.008720398,-0.0087890625,-0.0035820007,-0.04537964,0.025924683,0.03555298,0.0021896362,0.0049362183,0.0038471222,-0.0109939575,-0.001830101,0.0435791,0.026229858,-0.013015747,-0.0037174225,-0.026031494,0.02067566,0.03010559,-0.0030918121,-0.005367279,-0.029144287,0.0095825195,0.011062622,-0.011169434,-0.0058135986,0.0027828217,0.0103302,-0.034606934,0.018951416,0.028930664,0.019073486,0.04284668,-0.010375977,-0.011367798,-0.0013837814,0.037750244,0.007827759,-0.009757996,-0.015388489,0.018859863,-0.027450562,0.04824829,0.033569336,-0.008705139,0.0440979,0.0025539398,-0.015403748,-0.011703491,-0.017608643,0.043548584,-0.01574707,-0.008148193,-0.01436615,0.020980835,-0.018463135,-0.033966064,-0.009506226,-0.023773193,-0.02293396,-0.009590149,0.021453857,0.0072402954,0.0074157715,0.0368042,0.019165039,-0.01838684,0.064331055,0.0002965927,0.041809082,-0.010887146,0.009651184,0.055267334,0.018157959,0.04827881,0.018936157,0.017822266,-0.029403687,0.009147644,0.014328003,0.011116028,0.012504578,0.009819031,-0.022384644,0.038604736,-0.026550293,0.024780273,-0.0006213188,-0.0063819885,0.016555786,-0.0071487427,0.0020370483,-0.002286911,-0.0051956177,0.014053345,0.051879883,-0.032409668,-0.003162384,-0.016082764,-0.009887695,0.033172607,0.018051147,0.0048980713,0.0042877197,-0.020553589,0.007701874,-0.01687622,-0.018356323,0.010322571,0.030593872,-0.049072266,0.001168251,0.010238647,0.028839111,-0.033691406,0.0413208,0.052581787,-0.0006303787,0.0024719238,0.047210693,-0.010978699,0.033935547,-0.020690918,0.027145386,0.040924072,-0.0039405823,-0.0073776245,0.014198303,0.008903503,-0.01979065,0.013870239,0.029403687,0.00074863434,-0.0042915344,0.0077934265,0.0107421875,-0.010948181,0.015312195,-0.021484375,0.0071640015,-0.019332886,-0.0079193115,0.008934021,0.0064926147,0.0032577515,0.008766174,-0.0010757446,-0.0018348694,0.014129639,0.036865234,0.02670288,-0.041625977,-0.015342712,0.0074882507,0.02406311,-0.031204224,-0.011917114,0.0029850006,-0.041992188,0.010856628,0.021636963,0.006164551,0.013458252,-0.029800415,-0.012748718,0.035369873,0.0013446808,0.037017822,0.028396606,-0.008979797,0.017196655,-0.011192322,0.009719849,-0.006565094,-0.0048294067,0.010223389,0.018341064,-0.015068054,-0.028579712,0.017410278,-0.00831604,0.010848999,0.010261536,-0.0055503845,0.02696228,-0.017181396,0.012336731,0.009887695,0.0018510818,-0.025726318,-0.015342712,-0.011680603,0.022994995,0.049682617,-0.022216797,-0.019546509,0.03387451,0.036468506,0.018081665,0.032196045,0.019744873,0.03668213,0.0236969,-0.020095825,-0.035827637,0.022094727,-0.0099105835,-0.021759033,0.024047852,-0.027297974,-0.034301758,0.016540527,0.007080078,0.00043034554,-0.035339355,-0.0013799667,-0.02229309,-0.018066406,0.021469116,0.00042414665,0.020843506,-0.02128601,-0.0036697388,0.030548096,-0.03515625,-0.0154418945,-0.005115509,0.0070533752,-0.023712158,-0.052703857,0.0045661926,-0.009712219,0.014511108,-0.030853271,-0.0008716583,-0.012939453,0.025848389,0.0030708313,-0.011680603,0.011360168,0.01890564,0.0025119781,0.0053520203,0.027633667,-0.025619507,-0.028182983,-0.0024147034,0.026397705,-0.02784729,0.028320312,-0.026626587,0.022033691,0.016647339,-0.0019283295,0.0076179504,-0.009559631,-0.025177002,-0.00089788437,-0.04067993,-0.029205322,0.02128601,0.031280518,-0.011367798,-0.011367798,0.04498291,-0.013175964,-0.020568848,0.031341553,0.038757324,0.011802673,0.020812988,0.0042915344,0.007637024,-0.020858765,0.0055007935,-0.014312744,-0.0043411255,-0.003665924,0.012382507,0.0015859604,0.019638062,0.010047913,-0.0129776,-0.0039901733,0.03111267,0.01247406,0.008377075,0.031204224,0.0158844,-0.009178162,-0.012420654,-0.018554688,0.005844116,0.043640137,0.008399963,0.015388489,0.0055999756,0.012329102,-0.010017395,0.01687622,0.022399902,-0.018630981,-0.04196167,-0.0101623535,-0.027740479,0.028442383,-0.011138916,0.013137817,-0.0071372986,0.020080566,0.0066223145,-0.04537964,-0.02078247,0.027404785,0.0121536255,0.0025634766,-0.015052795,0.0046195984,0.0027008057,-0.0362854,0.0039596558,-0.047973633,-0.032409668,-0.020736694,-0.008216858,0.011726379,0.0062446594,-0.009712219,0.0052261353,-0.0048561096,-0.002046585,0.017303467,0.018508911,-0.029953003,-0.003545761,0.024429321,0.026245117,-0.018417358,0.018417358,-0.0074882507,0.005683899,0.019882202,0.00086069107,0.025985718,-0.02218628,0.022537231,-0.000095665455,-0.019226074,0.014770508,-0.0067596436,0.022857666,-0.027542114,-0.005706787,-0.02104187,0.018112183,0.03253174,-0.0140686035,-0.03286743,0.0021076202,-0.012893677,-0.03289795,-0.0115356445,0.004623413,0.033081055,-0.01763916,0.03677368,-0.016784668,-0.017730713,0.0037498474,0.003704071,-0.028701782,0.0025577545,0.01965332,0.008384705,-0.00036978722,0.0016546249,-0.010292053,-0.03564453,-0.017349243,0.0155181885,-0.0060653687,-0.006000519,0.021209717,0.009849548,0.047424316,-0.014678955,0.021560669,0.024993896,0.017990112,0.023895264,0.015991211,0.028030396,0.010009766,-0.034698486,-0.005771637,0.0006098747,-0.032043457,0.01576233,-0.00088071823,-0.0061149597,-0.033447266,0.018356323,-0.0029754639,0.022735596,0.009727478,-0.0027046204,-0.02357483,0.013046265,-0.040222168,-0.003917694,-0.02583313,0.018356323,0.045410156,0.013702393,0.008903503,-0.003320694,-0.01272583,0.04156494,0.041137695,-0.010894775,-0.038085938,-0.031036377,0.01625061,0.0012216568,0.009643555,0.0129852295,-0.038146973,-0.016220093,-0.010375977,-0.005531311,0.009437561,-0.0051612854,0.010353088,0.022735596,-0.010223389,-0.013366699,0.03164673,-0.018829346,-0.0031147003,0.00484848,0.008773804,0.030319214,0.036376953,-0.01473999,0.008773804,0.028289795,-0.048583984,0.040985107,-0.013069153,0.0007429123,-0.0042381287,0.01826477,-0.03540039,-0.017929077,-0.0021209717,0.011070251],"createdAt":"2026-04-21T18:32:29.019Z","updatedAt":"2026-04-22T02:32:10.541Z","lastSeenAt":"2026-04-22T02:32:10.541Z","tsv":"'/api/v1/nfts/99':32,200 '/request':129 '0.02':10,24,116,128 '000':105 '0x8335':90 '16':170 '20':104 '2913':91 '402 payment API' '6':111 '99':71 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':158 'access':141 'across':172 'advertis':100 'ai':177 'ai/ml':53 'analyt':52,176 'api':49,134 'appear':62 'application/json':163 'attach':144 'base':8,22,85,106 'base-network' 'broader':165 'caller':142 'catalog':208 'categori':174 'challeng':99,229 'collect':40 'confirm':227 'consist':119 'contract':89 'convert':114 'crawl':195 'data':5,19,51,68,175 'decim':112 'detail':185 'document':79,187,222 'emphas':132 'endpoint':6,20,30,61,157,171,198,225 'exact':74,95 'exampl':190 'financ':179 'finance/web3':55 'flat':125 'format':214 'found':192 'four':173 'gate':3,17 'header':149 'homepag':206 'id':70 'infer':54 'infrastructur':57,181 'instant':140 'json-response' 'key':135 'light':221 'limit':138 'list':168,203 'live':223 'lowpaymentfee' 'lowpaymentfee.com':37,166 'maxamountrequir':102 'ml':178 'network':86 'nft':4,18,66,197 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':183 'part':34 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payload':76 'payment':80,148,154,228 'per':11,25,47,117 'platform':38,131,167 'post':159 'price':126 'proof':155 'protocol':44 'purpos':211 'rate':137 'relat':67 'remain':215 'request':12,26,48,118,160 'request/response':186 'resourc':69 'respons':75,213 'return':162 'rough':169 'schema':184 'scheme':96 'serv':64 'settl':82 'simpli':143 'sinc':108 'site':123 'site-wid':122 'span':50 'specif':60,199 'though':72 'treat':217 'unclear':216 'unit':107 'usag':189 'usdc':14,28,88,109 'usdc-settlement' 'use':87,110 'util':58 'valid':152 'via':92 'web3':180 'wide':124 'x':147 'x-payment':146 'x402':2,16,43,94,98,153,224 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"30e7655a-7258-41dc-9cf6-a6f1f4317e26","listingId":"e17c7b35-e7d6-4225-b9d9-1a77ddbde777","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/nfts/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:29.019Z"}],"sources":[{"listingId":"e17c7b35-e7d6-4225-b9d9-1a77ddbde777","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/99","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:29.019Z","lastSeenAt":"2026-04-22T02:32:10.541Z"}],"details":{"listingId":"e17c7b35-e7d6-4225-b9d9-1a77ddbde777","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/99 \\\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":"x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/99"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/99"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The NFT endpoint /api/v1/nfts/99 is not listed among the homepage's available APIs","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT metadata or details via a pay-per-request model","Integrating NFT data into agent workflows without API key management","Programmatic access to NFT information settled on Base L2"],"bestFor":["Agents or bots that need keyless, on-demand NFT data access","Developers experimenting with x402 payment protocol integrations","Low-volume consumers who prefer pay-per-call over subscriptions"],"notFor":["High-volume NFT data consumers who need bulk/batch endpoints","Users who need detailed documentation or guaranteed SLAs","Anyone requiring non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:56.707Z"},"updatedAt":"2026-04-22T02:32:10.541Z"}}