{"id":"b569b8be-b29e-439c-9b0e-90848d5465d5","shortId":"uNeVCy","kind":"x402","title":"NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.","tagline":"NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.","description":"This endpoint serves NFT metadata for token ID 29 from the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/nfts/29/metadata` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated entirely by the x402 micropayment.\n\nThe provider's landing page lists a uniform $0.02/request price across all endpoints. Documentation beyond the landing page is minimal — the /api, /pricing, and /README routes all resolve to a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual content of the NFT metadata returned is unknown from the available material.","tags":[],"capabilities":["nft-metadata","x402-payment","usdc-settlement","base-network","pay-per-request","json-response"],"categories":["nft","web3"],"synonyms":["NFT metadata API","token metadata","NFT token info","x402 NFT endpoint","Base USDC API","micropayment API","on-chain metadata"],"warnings":["No OpenAPI or schema documentation available","No example request or response bodies; actual NFT metadata content is unknown","Provider docs pages (/api, /pricing, /README) all return only a 'Connect wallet' prompt with no useful information","This endpoint is scoped to a single NFT token ID (29); generalizability is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/29/metadata","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/29/metadata","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no example payloads, and no documentation beyond a landing page listing. The actual content returned after payment is 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":"2026-04-21T23:33:22.762Z","embedding":[-0.03366089,-0.017730713,0.05831909,-0.011787415,-0.0054397583,-0.01940918,0.0022125244,0.020095825,0.040740967,-0.05432129,0.0178833,-0.006374359,-0.049316406,-0.06640625,-0.013267517,0.010536194,-0.0335083,-0.0050621033,-0.03842163,0.03656006,0.029327393,0.003271103,-0.031982422,0.041290283,-0.022155762,-0.021759033,-0.03048706,-0.010932922,0.0046844482,-0.0015640259,0.022094727,-0.019821167,0.0013933182,0.0055732727,-0.016983032,0.012466431,-0.002521515,0.0011072159,0.003929138,-0.021942139,-0.0038757324,-0.047698975,0.004924774,-0.01625061,-0.03152466,-0.031951904,-0.0012302399,-0.0065231323,0.0012130737,0.015670776,-0.015609741,-0.0015478134,-0.018630981,0.01398468,0.002357483,0.024978638,-0.006214142,-0.0099487305,0.022216797,0.009353638,0.028564453,-0.06427002,-0.017990112,0.013290405,-0.014022827,0.051452637,-0.02784729,0.043518066,-0.009597778,0.07287598,0.04107666,0.05618286,0.02116394,0.009269714,0.004638672,-0.03451538,-0.017211914,0.07147217,-0.043121338,-0.035308838,-0.012069702,-0.017181396,-0.036499023,-0.015464783,-0.020217896,-0.029373169,-0.016494751,0.015914917,-0.035369873,0.03677368,-0.087524414,-0.0062789917,-0.03543091,0.025039673,-0.018951416,-0.004901886,-0.016189575,0.008674622,0.02947998,0.017333984,-0.025650024,-0.018875122,0.0025367737,-0.0018501282,0.021316528,0.035217285,0.024917603,0.01864624,0.008323669,-0.0011138916,-0.04019165,0.015464783,-0.016281128,-0.018081665,0.004283905,0.015007019,-0.038909912,0.039367676,-0.015899658,0.02029419,-0.047332764,0.035827637,-0.0036010742,0.009178162,-0.007751465,-0.03918457,-0.02116394,0.0256958,-0.01171875,-0.010360718,0.06518555,-0.0023765564,0.014518738,-0.021942139,-0.032928467,-0.01084137,-0.034240723,-0.050354004,-0.050964355,-0.019424438,0.011672974,-0.00415802,0.033233643,0.033569336,-0.08868408,-0.006954193,-0.036346436,0.024124146,-0.025177002,0.008506775,-0.0019683838,0.018615723,-0.008850098,-0.030899048,0.008666992,-0.05279541,0.0030288696,-0.010787964,-0.0071029663,0.06112671,-0.0024433136,0.02319336,0.028320312,-0.00484848,0.048919678,0.035949707,-0.00831604,-0.06866455,-0.07489014,-0.0073547363,0.013328552,-0.022613525,-0.0046806335,-0.029220581,0.00052547455,-0.06298828,-0.0011997223,-0.03878784,0.021896362,-0.0335083,-0.004058838,-0.043426514,0.007183075,0.006702423,-0.04763794,-0.01586914,-0.015419006,0.0680542,0.033721924,0.018096924,0.004722595,0.0010328293,0.034118652,0.018554688,-0.03265381,-0.028381348,0.01424408,-0.037506104,0.023101807,-0.004348755,0.028930664,0.00013232231,0.04095459,0.050323486,-0.003206253,-0.002872467,-0.01625061,-0.08905029,-0.037322998,-0.010665894,0.029052734,0.031280518,-0.009017944,0.002538681,-0.031677246,-0.016113281,-0.007888794,0.011817932,0.0010023117,0.030456543,0.020904541,-0.0056152344,0.02368164,0.011878967,-0.033111572,0.027557373,-0.005340576,0.00084114075,0.0027694702,-0.032989502,0.02935791,0.020645142,-0.018325806,0.015266418,-0.03527832,0.026000977,-0.030212402,-0.018096924,-0.0061149597,0.00064086914,0.0077400208,-0.038238525,-0.008773804,0.028137207,-0.022994995,-0.008918762,-0.03616333,-0.05722046,0.037872314,0.047210693,0.0135650635,0.016357422,-0.014129639,-0.03427124,0.0012636185,-0.06518555,0.05203247,0.08605957,-0.0043525696,-0.012001038,0.023880005,-0.021881104,-0.040618896,-0.013504028,-0.004333496,-0.041900635,0.0064201355,0.0079574585,-0.038482666,-0.00035333633,0.0048942566,0.00869751,0.033050537,-0.039276123,-0.04849243,0.0016508102,-0.010787964,-0.0105896,-0.013587952,-0.026000977,0.015792847,0.0154418945,0.0340271,0.005683899,-0.0033798218,-0.0055656433,0.02532959,0.01386261,0.023757935,0.0024528503,-0.012084961,-0.000039577484,0.015167236,-0.023956299,-0.01499939,-0.018112183,0.06524658,-0.04727173,0.032348633,0.0047798157,0.004901886,0.018844604,0.008071899,-0.042541504,-0.00068569183,0.011512756,0.021255493,0.039276123,0.0029850006,-0.027923584,0.016082764,0.06896973,-0.044830322,-0.007461548,0.025878906,0.022827148,0.039794922,-0.003211975,-0.042236328,-0.017150879,0.006893158,-0.048217773,0.043914795,-0.021835327,0.019744873,-0.0061187744,-0.0077438354,-0.0129852295,-0.018035889,-0.015083313,0.010978699,-0.024841309,0.012390137,-0.013938904,-0.004432678,0.013999939,0.015029907,-0.020935059,0.010971069,0.042175293,0.059387207,-0.03604126,-0.03768921,-0.021408081,-0.031982422,0.0010671616,0.0035858154,0.015342712,0.014640808,0.040618896,-0.04135132,-0.005970001,0.029678345,0.0107421875,0.033172607,0.03439331,-0.005302429,-0.06201172,-0.04220581,-0.033477783,-0.04019165,0.04147339,0.02458191,-0.020904541,0.06088257,-0.022659302,-0.026733398,-0.046936035,0.022460938,-0.07128906,-0.044036865,0.02671814,-0.025222778,-0.011238098,0.009994507,0.010894775,0.014930725,0.017990112,0.026931763,0.0006275177,0.060760498,0.021392822,0.0020618439,0.012199402,0.028533936,0.027923584,0.0041046143,-0.03277588,-0.03894043,-0.023620605,0.031097412,-0.020217896,-0.04058838,-0.05050659,0.04699707,0.057434082,0.090026855,0.012680054,0.01309967,0.062316895,-0.018936157,-0.0040016174,-0.03756714,-0.021270752,-0.039794922,0.0021324158,0.029815674,0.0041885376,0.023742676,-0.036621094,0.01689148,-0.012138367,0.022155762,0.011062622,0.057525635,0.014389038,-0.009147644,0.03527832,0.022460938,0.035339355,0.07128906,-0.00019848347,0.0541687,-0.0055274963,-0.059692383,-0.0013771057,0.022720337,-0.010398865,0.0032024384,-0.056671143,-0.03918457,0.021224976,0.008522034,-0.044555664,-0.012649536,0.013710022,0.03479004,0.043914795,-0.009231567,-0.012313843,-0.01890564,-0.020935059,-0.06384277,0.005054474,-0.055358887,-0.0026721954,0.04550171,-0.005138397,0.008979797,-0.009246826,0.008956909,-0.0033111572,0.0063934326,0.015960693,0.0013847351,-0.022064209,0.013679504,0.0040664673,0.030166626,0.009498596,0.02909851,0.030441284,0.046051025,0.020095825,0.013305664,-0.036376953,-0.05432129,0.058502197,-0.025619507,-0.0096588135,0.03463745,-0.0011510849,0.00035977364,-0.0115356445,-0.011672974,-0.037750244,0.031204224,-0.023147583,0.015342712,0.015625,-0.015525818,-0.026885986,-0.054656982,-0.014266968,-0.042114258,0.04360962,0.020355225,0.015975952,-0.036010742,-0.024520874,0.016479492,-0.000118136406,0.024505615,-0.012557983,-0.01777649,-0.022262573,-0.03414917,0.012275696,-0.027816772,0.020843506,-0.01979065,-0.007709503,0.049194336,0.02947998,0.0027770996,0.017593384,0.009689331,0.030044556,-0.027923584,0.025436401,0.022918701,0.05291748,0.005203247,-0.0069847107,-0.03845215,0.03543091,0.0018148422,0.034484863,-0.03363037,-0.005279541,0.002374649,0.038330078,0.030212402,-0.03652954,0.01586914,-0.010429382,-0.035827637,-0.0670166,0.03933716,-0.012924194,0.033233643,0.0039749146,0.0054512024,0.03427124,-0.010848999,-0.0014305115,0.037017822,-0.030456543,-0.02279663,-0.023757935,-0.038360596,-0.02407837,-0.007675171,-0.027923584,0.023956299,-0.008674622,0.012924194,0.0075416565,-0.020080566,0.006225586,0.012390137,-0.005466461,0.02468872,0.0027770996,0.02532959,0.05303955,0.020248413,-0.034729004,0.03805542,0.015640259,-0.010498047,-0.009735107,0.050811768,0.044830322,0.023468018,0.004383087,-0.0007715225,0.009918213,-0.021865845,-0.002866745,-0.0024929047,-0.02027893,0.009117126,-0.024734497,-0.006210327,-0.007259369,-0.022857666,-0.0141067505,0.010147095,0.023910522,-0.02029419,0.015106201,0.03881836,0.04724121,-0.028884888,0.012054443,0.005695343,0.043518066,0.031585693,-0.00699234,0.0023517609,0.022979736,-0.004146576,0.02027893,0.020629883,-0.010688782,0.032806396,0.02029419,0.027770996,0.019638062,0.016311646,-0.01777649,-0.035949707,-0.012313843,0.007183075,-0.022659302,0.03866577,0.013946533,0.017623901,0.0014209747,0.005012512,-0.005596161,-0.011398315,-0.027328491,-0.0017433167,0.029083252,0.000018894672,-0.025482178,-0.0002989769,0.01979065,0.016296387,-0.040405273,-0.0040626526,0.0057144165,0.0090408325,-0.037109375,-0.049560547,-0.039276123,-0.022277832,0.01739502,0.010246277,-0.00004118681,0.026855469,0.0013828278,-0.010818481,0.016204834,0.021575928,-0.0015153885,-0.0065994263,-0.029678345,0.0029773712,-0.007980347,-0.0044784546,-0.005844116,-0.0054626465,-0.045135498,-0.031829834,0.006023407,-0.018844604,-0.021835327,-0.011741638,-0.005756378,0.020355225,-0.010971069,0.020950317,-0.020080566,-0.023010254,-0.00548172,0.006149292,0.021636963,-0.030410767,0.021316528,-0.007904053,0.033935547,-0.007774353,0.004798889,0.019195557,0.024490356,0.02381897,0.014678955,-0.032226562,0.030380249,-0.05480957,0.045074463,0.009162903,-0.027572632,0.026489258,-0.02407837,-0.023925781,0.03503418,-0.023468018,-0.019073486,0.013687134,-0.06384277,-0.0093307495,-0.04788208,0.035888672,0.013328552,0.039276123,-0.013900757,0.011138916,0.004299164,0.009414673,-0.017044067,0.0085372925,-0.011245728,0.02116394,0.02545166,0.015388489,-0.01512146,-0.0118637085,0.0017032623,-0.016326904,-0.039794922,-0.027328491,-0.015403748,0.007080078,0.008987427,0.01776123,-0.022262573,-0.028778076,0.0035896301,-0.026290894,0.01689148,-0.0038719177,0.0014629364,0.008987427,-0.011520386,-0.01638794,0.0057792664,-0.017623901,0.027877808,0.016616821,0.013542175,-0.025405884,-0.0008878708,0.038024902,0.019195557,0.01033783,-0.01335907,-0.0037059784,-0.036743164,-0.06008911,0.007572174,-0.0003786087,0.022750854,0.008270264,-0.0066452026,-0.052581787,0.0063323975,-0.028778076,0.0016403198,0.015487671,-0.0047073364,0.016952515,0.002445221,-0.013305664,-0.02709961,-0.015266418,-0.018218994,-0.0054244995,0.0088272095,-0.0076408386,0.025054932,0.057800293,-0.008666992,0.003686905,-0.0013656616,-0.006362915,0.017532349,-0.012748718,-0.0001872778,-0.00995636,0.012878418,-0.0043258667,-0.020217896,-0.04171753,0.006252289,0.06185913,-0.0077209473,-0.022537231,0.0014829636,-0.02885437,0.00089788437,0.03289795,-0.028366089,-0.0062675476,-0.03967285,0.027404785,-0.009292603,0.017654419,-0.01436615,0.027557373,-0.014427185,-0.030014038,-0.008666992,-0.030380249,-0.009307861,-0.06341553,-0.0231781,-0.0635376,0.022857666,-0.020446777,-0.03479004,-0.007572174,0.029083252,-0.019058228,-0.071899414,0.008506775,0.044555664,0.007484436,0.02192688,-0.007926941,0.03878784,0.021362305,0.008071899,-0.008018494,0.013259888,-0.018325806,-0.014289856,-0.021896362,0.019882202,0.02444458,-0.03024292,0.024780273,0.016693115,0.021636963,-0.008277893,0.026916504,-0.036987305,-0.0028972626,-0.0054244995,0.015899658,-0.015419006,0.011726379,0.05984497,-0.06359863,0.022567749,0.019073486,-0.001209259,0.01725769,0.00806427,0.018218994,-0.033447266,-0.0093688965,0.007572174,0.01374054,0.044433594,-0.019134521,-0.010536194,0.022888184,-0.020889282,-0.0038051605,-0.0056495667,-0.0112838745,-0.05899048,-0.022018433,0.0046539307,0.012748718,-0.0103302,-0.020568848,0.023162842,-0.00969696,0.0053749084,0.013244629,-0.022827148,-0.00806427,-0.03286743,0.011398315,0.010292053,-0.00024795532,-0.042388916,0.020965576,0.03741455,0.0071411133,0.016357422,-0.0029621124,-0.004589081,0.012084961,-0.002292633,-0.013923645,0.0234375,0.006225586,0.008766174,0.028564453,0.016357422,-0.043029785,-0.020477295,-0.018341064,0.0031337738,0.008018494,-0.0002734661,0.006832123,0.004634857,0.019317627,-0.00756073,-0.021224976,-0.003730774,-0.028335571,-0.02407837,-0.0008816719,-0.030532837,0.019729614,-0.014183044,-0.0115356445,0.011154175,0.0017261505,0.03274536,-0.012939453,-0.02041626,0.021865845,0.05227661,0.015586853,-0.043029785,0.0012798309,-0.02420044,-0.012062073,0.00074768066,-0.042175293,0.01940918,0.031021118,-0.011444092,0.012428284,0.0029201508,0.033935547,0.0032310486,0.006008148,0.01197052,0.026763916,-0.013282776,0.049926758,-0.048980713,0.02949524,0.014678955,0.0054473877,-0.02229309,-0.02003479,-0.01486969,0.021820068,0.019714355,0.0020942688,0.02557373,-0.012786865,0.039276123,-0.022476196,-0.026397705,0.00894165,-0.014884949,-0.0042686462,0.009185791,0.0049095154,0.016113281,0.027130127,-0.027526855,0.017211914,-0.012489319,0.0054244995,-0.01084137,-0.028442383,-0.006500244,-0.0028896332,-0.0021820068,-0.022094727,-0.025177002,0.003686905,-0.02116394,0.061035156,0.025924683,0.016479492,0.026565552,0.016052246,0.021865845,-0.025161743,-0.024215698,0.0021400452,-0.0077323914,0.030288696,-0.022201538,0.028579712,0.04272461,-0.005443573,0.04925537,0.020095825,0.043914795,0.010917664,0.021865845,-0.026977539,-0.009117126,-0.034606934,0.0029411316,-0.022018433,0.039733887,-0.023284912,0.0029716492,-0.0016756058,0.024215698,-0.0076446533,0.018463135,0.054107666,0.012023926,0.0013418198,0.047790527,0.011260986,-0.019073486,-0.012687683,-0.0031852722,0.05050659,0.011459351,0.036468506,0.035491943,-0.0076026917,-0.006248474,-0.0033073425,-0.020004272,-0.0154800415,0.030288696,0.04019165,-0.013961792,0.0030879974,-0.021240234,-0.016921997,-0.040252686,-0.032196045,0.025283813,0.007709503,0.010437012,-0.013801575,-0.001004219,-0.007331848,0.04763794,0.011932373,-0.0006752014,-0.017669678,0.018341064,0.028533936,0.0036296844,0.01713562,-0.0030784607,0.0022621155,-0.02961731,-0.02772522,0.023132324,0.029800415,-0.024169922,-0.011558533,0.018798828,-0.0010023117,0.025360107,0.012268066,-0.02796936,-0.0066833496,0.005897522,0.010948181,-0.0068130493,0.046875,0.028686523,0.013786316,0.030517578,0.03488159,0.014968872,-0.032989502,0.0154800415,-0.015960693,0.0075035095,0.010406494,0.02003479,0.03463745,-0.015403748,0.028366089,0.0004606247,-0.015991211,0.017623901,0.012825012,0.0067710876,-0.021148682,0.01033783,0.0075302124,-0.014549255,-0.010856628,0.0037117004,-0.010879517,0.01234436,0.032348633,0.024398804,-0.029403687,0.036865234,0.0053138733,-0.0057792664,-0.010421753,0.03829956,-0.06939697,-0.014945984,-0.0055274963,-0.010543823,-0.04144287,0.023498535,0.037475586,-0.0057754517,-0.0031814575,0.009292603,-0.009605408,0.013290405,0.01725769,0.018157959,0.012519836,-0.00078344345,-0.036499023,0.027130127,0.03652954,-0.01486969,-0.013542175,-0.015655518,0.030212402,-0.0011739731,-0.010055542,-0.0022296906,0.025375366,-0.0146102905,-0.024536133,0.01071167,0.023132324,0.017654419,0.026397705,-0.011650085,-0.009460449,0.018707275,0.032287598,0.010147095,-0.011047363,-0.019241333,0.042144775,-0.030334473,0.05239868,0.04272461,-0.01777649,0.039398193,0.008407593,-0.013946533,-0.0037651062,-0.01424408,0.044830322,-0.0077934265,-0.012741089,-0.0016002655,0.018035889,-0.019760132,-0.02545166,-0.0014076233,-0.013206482,-0.015220642,-0.019195557,-0.003211975,-0.008918762,0.014167786,0.045196533,0.030258179,-0.011108398,0.05496216,-0.012641907,0.033935547,-0.021560669,0.0053138733,0.05807495,0.004016876,0.060577393,0.014083862,0.023925781,-0.03387451,0.015304565,-0.004749298,0.007881165,0.02142334,0.018112183,-0.010139465,0.04196167,-0.007820129,0.036712646,0.02003479,0.0016727448,0.0075798035,-0.008361816,-0.003484726,0.0031356812,-0.011665344,0.01751709,0.034942627,-0.046142578,0.012283325,-0.024642944,-0.01828003,0.017242432,0.008987427,-0.005393982,-0.0028533936,-0.010871887,0.006629944,-0.023986816,-0.00894165,0.009963989,0.012588501,-0.04776001,-0.014709473,0.017654419,0.016998291,-0.019607544,0.026916504,0.07293701,0.006412506,-0.006454468,0.02444458,-0.012939453,0.033813477,-0.005191803,0.027160645,0.017196655,-0.0015335083,-0.010787964,0.003540039,0.010429382,-0.023803711,-0.0041007996,0.021759033,0.017929077,0.0115356445,0.024291992,0.012168884,-0.015975952,-0.00090551376,-0.021011353,0.011154175,-0.03186035,-0.014862061,0.021896362,0.0066719055,0.011909485,0.024032593,-0.012619019,-0.008491516,0.030776978,0.016311646,0.01777649,-0.051757812,0.0008678436,0.019714355,0.0004427433,-0.029571533,-0.014122009,0.009094238,-0.037017822,-0.00030136108,0.028015137,0.00052404404,0.02067566,-0.03652954,-0.0068244934,0.044677734,0.001666069,0.028808594,0.020187378,-0.021881104,0.030136108,-0.008415222,-0.0071792603,-0.014030457,-0.0037975311,0.024841309,0.01651001,-0.031555176,-0.034820557,0.019561768,-0.020751953,0.010597229,0.019210815,0.0062828064,0.020019531,-0.01725769,0.0231781,0.006286621,0.027770996,-0.023605347,-0.013328552,0.004234314,0.018585205,0.031173706,-0.027557373,-0.01838684,0.027160645,0.023651123,0.015304565,0.033111572,0.010101318,0.041809082,0.014190674,-0.011474609,-0.0035419464,-0.0039100647,-0.014564514,-0.005340576,0.015159607,-0.014984131,-0.020217896,0.03918457,0.021194458,-0.016296387,-0.042144775,-0.005241394,-0.016281128,-0.022277832,0.036834717,0.002450943,0.034179688,-0.000233531,-0.012779236,0.008766174,-0.026046753,-0.036865234,0.0018262863,0.0068206787,-0.016616821,-0.04559326,-0.0041542053,-0.011978149,0.032806396,-0.02720642,-0.010734558,-0.0035362244,0.010292053,-0.0010261536,-0.01675415,-0.0154800415,0.018676758,-0.009094238,0.004623413,0.030410767,-0.007232666,-0.04019165,-0.04034424,0.027526855,-0.019332886,0.04046631,0.0014047623,0.03363037,0.009979248,0.011497498,-0.00050354004,-0.0048675537,-0.004749298,-0.00032401085,-0.0413208,-0.041107178,0.025177002,0.030212402,-0.010238647,-0.024246216,0.03149414,-0.009628296,-0.0039100647,0.043273926,0.046966553,0.0011262894,0.018295288,-0.0010900497,-0.0040130615,-0.013786316,0.013122559,-0.026977539,0.004512787,-0.0112838745,0.003452301,0.014518738,0.007873535,0.018737793,-0.02532959,-0.019943237,0.018981934,0.026687622,0.02633667,0.021621704,0.019836426,-0.008964539,-0.0107421875,-0.024246216,-0.00548172,0.022277832,0.00970459,0.03463745,0.008773804,0.0059547424,-0.01398468,0.019683838,0.012519836,-0.013290405,-0.04324341,-0.010765076,-0.048828125,0.027420044,0.0019512177,0.004283905,-0.004333496,0.011741638,-0.010475159,-0.060272217,-0.008079529,0.02796936,0.014709473,0.0009551048,-0.0178833,-0.014289856,-0.009231567,-0.03286743,-0.00066518784,-0.036224365,-0.038269043,-0.002620697,-0.007865906,0.0256958,-0.010398865,-0.011688232,-0.0017004013,-0.0007123947,-0.0020809174,-0.019485474,0.019607544,-0.012237549,-0.012908936,0.0069999695,0.028564453,-0.020568848,0.002380371,-0.022979736,0.010887146,0.041748047,-0.009170532,0.035614014,-0.030975342,0.0124053955,0.007713318,0.008384705,0.018844604,-0.005794525,0.0236969,-0.01852417,-0.0036964417,0.0032749176,0.0015611649,0.02468872,-0.017974854,-0.032836914,0.0028495789,-0.014984131,-0.026779175,-0.001241684,-0.004142761,-0.0061950684,-0.0184021,0.039276123,-0.02684021,-0.02949524,0.02041626,-0.0047073364,-0.012626648,0.008346558,0.015853882,0.0015468597,-0.011657715,-0.0038051605,-0.006690979,-0.042510986,-0.0040512085,-0.009361267,-0.021942139,0.011276245,0.015602112,-0.0028247833,0.05987549,-0.0012435913,0.023880005,0.021713257,0.014541626,0.031021118,0.018203735,0.043121338,-0.012626648,-0.020553589,-0.005088806,0.015586853,-0.03970337,0.018508911,-0.014862061,-0.02027893,-0.01826477,0.024093628,0.003484726,0.03314209,0.021606445,0.014289856,-0.031951904,0.010322571,-0.019561768,-0.029769897,-0.033569336,0.023880005,0.04107666,0.0037498474,0.009109497,-0.0049057007,-0.018753052,0.03378296,0.041748047,-0.010543823,-0.055999756,-0.02633667,0.041168213,0.0034561157,0.018508911,0.00434494,-0.017852783,0.001452446,-0.010604858,-0.015975952,0.02003479,-0.015083313,0.011802673,0.020874023,0.013023376,-0.007083893,0.039031982,-0.019882202,-0.008811951,0.0046577454,-0.004173279,0.049987793,0.029006958,-0.011405945,0.008857727,0.009407043,-0.029769897,0.048797607,-0.01121521,0.00026202202,0.0056991577,0.0038757324,-0.029205322,-0.031402588,0.0010242462,0.0007901192],"createdAt":"2026-04-21T18:32:28.034Z","updatedAt":"2026-04-22T18:05:11.105Z","lastSeenAt":"2026-04-22T18:05:11.105Z","tsv":"'/api':175 '/api/v1/nfts/29/metadata':91 '/pricing':176 '/readme':178 '/request':16,32,162 '0.02':15,31,118,161 '000':107 '0x8335':112 '20':106 '29':41 '2913':113 '300':134 '6':123 'Base USDC API' 'NFT metadata API' 'NFT token info' 'accept':92 'access':145 'across':164 'actual':207 'addit':189 'advertis':101,144 'ai/ml':67 'analyt':66 'api':58,138 'avail':205,218 'base':5,21,85,108,115 'base-network' 'beyond':168 'broader':51 'call':9,25 'challeng':100 'connect':184 'content':208 'cost':104 'data':65 'decim':124 'detail':191 'document':167,200 'endpoint':3,19,34,74,89,166 'entir':148 'equal':117 'exact':130 'exampl':203 'finance/web3':69 'gate':147 'id':40 'infer':68 'infrastructur':71 'json':97 'json-response' 'key':139 'land':156,170 'limit':142 'list':158 'lowpaymentfee.com':44 'made':127 'materi':219 'maximum':103 'metadata':2,18,37,212 'micropay':152 'micropayment API' 'minim':173 'network':86 'nft':1,17,36,211 'nft-metadata' 'offer':59 'on-chain metadata' 'openapi':195 'page':157,171 'part':48 'pay':7,23,55 'pay-per-cal':6,22 'pay-per-request':54 'payload':204 'payment':78,125 'per':8,24,56,119 'platform':45 'post':93 'price':163 'prompt':186 'protocol':79 'provid':63,154 'rate':141 'request':57,94,120 'request/response':198 'resolv':181 'return':96,213 'rout':179 'schema':199 'scheme':131 'second':135 'serv':35 'settl':80 'span':64 'spec':196 'specif':88 'suit':52 'technic':190 'timeout':136 'token':39 'token metadata' 'uniform':160 'unit':109 'unknown':215 'usdc':13,29,82,111,121 'usdc-settlement' 'use':75,122 'util':72 'via':10,26,128 'wallet':185 'x402':11,27,77,99,151 'x402 NFT endpoint' 'x402-payment'","prices":[{"id":"2c9efb8a-6562-49f3-a18b-25cd2e8654bf","listingId":"b569b8be-b29e-439c-9b0e-90848d5465d5","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/29/metadata","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.034Z"}],"sources":[{"listingId":"b569b8be-b29e-439c-9b0e-90848d5465d5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/29/metadata","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.034Z","lastSeenAt":"2026-04-22T18:05:11.105Z"}],"details":{"listingId":"b569b8be-b29e-439c-9b0e-90848d5465d5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/29/metadata \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/nfts/29/metadata"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/29/metadata"}],"useCases":["Retrieving metadata for NFT token ID 29 programmatically","Integrating NFT metadata into a dApp or marketplace UI","Demonstrating x402 micropayment-gated API access"],"bestFor":["Developers needing on-demand NFT metadata without API key management","Agents or bots that can settle x402 payments in USDC on Base","Quick, low-cost single-request metadata lookups"],"notFor":["Bulk retrieval of metadata across many NFT collections (only token 29 is exposed at this path)","Users who need detailed documentation or OpenAPI specs before integrating","Applications requiring non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.442Z"},"updatedAt":"2026-04-22T18:05:11.105Z"}}