{"id":"c936fabe-a3e6-4572-89d3-ab57f048d514","shortId":"LJEp74","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 54 via a pay-per-request x402 protocol on the Base network. The caller sends a POST request with an X-PAYMENT header containing a USDC payment proof, and receives JSON metadata in return. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe endpoint is part of a broader platform at lowpaymentfee.com that offers dozens of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access; payment is the only authentication mechanism, settled on-chain via USDC on Base (contract 0x8335…2913).\n\nThe specific resource at `/api/v1/nfts/54/metadata` is not documented beyond its x402 challenge. The response schema is not provided, so the exact metadata fields returned are unknown. The endpoint is live and returns a well-formed 402 challenge with x402 version 1, a 300-second payment timeout, and an \"exact\" payment scheme.","tags":[],"capabilities":["nft-metadata","x402-payment","usdc-base","pay-per-request","json-response"],"categories":["nft","web3"],"synonyms":["NFT metadata API","token metadata","NFT info endpoint","x402 NFT","Base USDC API","pay-per-call NFT","on-chain payment API"],"warnings":["No response schema or example response documented — actual metadata fields are unknown.","Endpoint serves metadata for a single NFT (token ID 54); unclear if other token IDs are available at sibling paths.","No OpenAPI specification or detailed docs found for this endpoint.","The broader platform lists many API categories but crawled pages beyond the homepage returned only 'Connect wallet' with no content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/54/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/54/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 challenge, but there is no documentation on request body format, response schema, or what metadata is actually returned. The listing title is generic ('Premium API Access') and the endpoint path suggests a single NFT token. No OpenAPI spec or examples are available.","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":"2026-04-22T00:37:10.351Z","embedding":[-0.0231781,-0.015365601,0.057281494,-0.010665894,-0.007320404,-0.018508911,0.006965637,0.008163452,0.020065308,-0.060028076,0.018493652,-0.0131073,-0.039855957,-0.076538086,-0.0209198,-0.0023651123,-0.016036987,0.0023784637,-0.031555176,0.04031372,0.034851074,0.0007557869,-0.022201538,0.03201294,-0.021194458,-0.021957397,-0.042541504,-0.00756073,0.00242424,0.0033836365,0.03314209,-0.018844604,0.0024089813,0.009147644,-0.033203125,-0.004070282,0.0020160675,0.0035247803,-0.00069999695,-0.024780273,-0.005256653,-0.05645752,0.0036029816,-0.015045166,-0.022369385,-0.023880005,-0.00057792664,0.00057315826,0.014312744,0.018936157,-0.016021729,-0.0016860962,-0.020736694,0.009086609,-0.0002297163,0.029190063,-0.0021705627,-0.006614685,0.021850586,0.02142334,0.023452759,-0.06427002,-0.023971558,0.016708374,-0.019515991,0.040985107,-0.034576416,0.04458618,0.004787445,0.06262207,0.045776367,0.06878662,0.01586914,-0.0026626587,0.0143585205,-0.046875,0.00017690659,0.060668945,-0.041778564,-0.03881836,0.0011081696,-0.009223938,-0.047851562,-0.0069274902,-0.031585693,-0.024093628,-0.012199402,0.011390686,-0.02645874,0.03250122,-0.09039307,-0.0021877289,-0.030456543,0.007671356,-0.015640259,-0.002090454,-0.017059326,0.0070877075,0.02078247,0.01739502,-0.031921387,-0.015975952,0.011169434,-0.007080078,0.029006958,0.033325195,0.029083252,0.026901245,-0.013244629,-0.0074386597,-0.04095459,0.023529053,-0.012168884,-0.03024292,0.0066452026,0.0036392212,-0.043792725,0.034332275,-0.013938904,0.050994873,-0.04937744,0.047332764,-0.00844574,-0.003944397,-0.0066070557,-0.035736084,-0.012039185,0.013084412,-0.003452301,0.0045051575,0.038909912,-0.0049209595,0.011299133,-0.025970459,-0.0413208,-0.0021190643,-0.039123535,-0.05960083,-0.040130615,-0.011238098,0.008125305,-0.018188477,0.033569336,0.03060913,-0.096191406,-0.001613617,-0.036956787,0.027053833,-0.04171753,0.011116028,-0.010566711,0.030807495,-0.006511688,-0.028320312,0.020874023,-0.057647705,0.009490967,0.0055503845,-0.0072898865,0.051483154,0.016357422,0.014190674,0.0138168335,0.0020980835,0.057891846,0.026901245,-0.003211975,-0.062347412,-0.072021484,-0.0056610107,0.010185242,-0.009437561,-0.0038261414,-0.011291504,-0.003211975,-0.050476074,-0.00982666,-0.024032593,0.021011353,-0.044677734,-0.00027751923,-0.05203247,0.008522034,0.009971619,-0.05227661,-0.016082764,-0.015609741,0.07196045,0.048583984,0.028076172,-0.0039138794,0.011253357,0.035736084,0.016586304,-0.046020508,-0.025100708,0.009307861,-0.032104492,0.02508545,-0.010292053,0.026992798,0.0090789795,0.032348633,0.061279297,0.0024719238,-0.008087158,-0.020385742,-0.08770752,-0.05517578,-0.0063705444,0.026733398,0.029830933,0.00075244904,0.011207581,-0.03781128,-0.025253296,0.004558563,0.00390625,0.009666443,0.038970947,0.009780884,-0.013069153,0.02532959,0.014350891,-0.042510986,0.033813477,0.0021209717,0.012077332,-0.0050582886,-0.031082153,0.021560669,0.021835327,-0.0098724365,0.021713257,-0.031707764,0.022781372,-0.030593872,-0.017166138,-0.000018000603,-0.005710602,0.01058197,-0.023361206,-0.019256592,0.02305603,-0.027435303,-0.013206482,-0.0317688,-0.05831909,0.042755127,0.054779053,-0.0008845329,0.014221191,-0.013832092,-0.036132812,-0.0043144226,-0.05807495,0.05227661,0.078063965,0.0017490387,-0.015487671,0.027511597,-0.027954102,-0.056610107,0.001168251,-0.008331299,-0.038146973,0.01550293,-0.010887146,-0.036346436,-0.004676819,0.0062026978,-0.00008332729,0.027023315,-0.046051025,-0.06121826,0.008850098,-0.009147644,0.0026798248,-0.0040397644,-0.03125,0.014923096,0.0101623535,0.027053833,-0.0010766983,0.000895977,-0.0057678223,0.020004272,0.006259918,0.038238525,0.002500534,-0.006351471,0.010940552,0.018371582,-0.030288696,-0.022521973,-0.031463623,0.06866455,-0.053100586,0.044281006,-0.011474609,-0.0028057098,0.030090332,0.00932312,-0.047668457,0.012321472,0.015541077,0.01751709,0.029312134,0.011657715,-0.036315918,0.024795532,0.06665039,-0.048583984,-0.011695862,0.01234436,0.010269165,0.039855957,-0.001707077,-0.041931152,-0.023544312,0.012046814,-0.035614014,0.04220581,-0.034179688,0.010437012,-0.0023860931,-0.0049743652,-0.016860962,0.0056419373,-0.015106201,0.014518738,0.0016012192,-0.007801056,-0.029190063,0.0074691772,0.009056091,0.008300781,-0.015487671,0.012641907,0.03744507,0.06750488,-0.030014038,-0.046813965,-0.033325195,-0.03338623,-0.0020256042,0.0078048706,0.01939392,0.0019235611,0.032440186,-0.037963867,-0.0042648315,0.027694702,0.012908936,0.02859497,0.029708862,-0.0048942566,-0.062683105,-0.039245605,-0.031982422,-0.036376953,0.044036865,0.032836914,-0.010032654,0.06359863,-0.010429382,-0.030334473,-0.042877197,0.024673462,-0.07727051,-0.0513916,0.030395508,-0.028549194,-0.013084412,0.017044067,0.002193451,0.016860962,0.009941101,0.026687622,0.009635925,0.059692383,0.032196045,-0.002450943,0.0079574585,0.027816772,0.028060913,0.011398315,-0.031951904,-0.03744507,-0.048217773,0.034423828,-0.035308838,-0.036865234,-0.047302246,0.045288086,0.045288086,0.09814453,0.012023926,0.008415222,0.05340576,-0.012207031,-0.0029850006,-0.032165527,-0.014694214,-0.040405273,-0.011360168,0.030197144,-0.0019197464,0.031097412,-0.036468506,0.024887085,-0.008270264,0.027435303,-0.0023593903,0.057250977,0.019744873,-0.020004272,0.040130615,0.020126343,0.03564453,0.063964844,0.009735107,0.05444336,0.008605957,-0.046905518,-0.0041160583,0.0115737915,-0.0068893433,0.0069885254,-0.055877686,-0.04156494,0.016281128,0.015098572,-0.0491333,-0.0010099411,0.009773254,0.043884277,0.044525146,-0.011024475,-0.013916016,-0.014602661,-0.01852417,-0.05831909,-0.005542755,-0.043762207,-0.010368347,0.03817749,-0.0060272217,0.012321472,-0.023132324,0.009628296,0.017608643,0.011802673,0.0036334991,-0.002855301,-0.025497437,0.010032654,0.0019721985,0.030883789,0.007873535,0.013671875,0.01411438,0.04812622,0.029678345,0.005947113,-0.033081055,-0.062164307,0.051605225,-0.037750244,-0.013191223,0.04598999,-0.0053215027,0.009880066,-0.0113220215,-0.013687134,-0.022338867,0.030899048,-0.028717041,0.023712158,0.017532349,-0.014091492,-0.044921875,-0.057250977,-0.012710571,-0.040161133,0.043121338,0.022125244,0.017791748,-0.020828247,-0.016693115,0.02456665,0.0058670044,0.035583496,-0.012687683,-0.012550354,-0.020263672,-0.035980225,-0.003282547,-0.014678955,0.014213562,-0.019760132,-0.00019133091,0.03894043,0.018936157,0.007572174,0.007713318,0.014656067,0.0256958,-0.015106201,0.016082764,0.020980835,0.061279297,0.0013217926,-0.0043258667,-0.030899048,0.023162842,0.0030326843,0.02658081,-0.040008545,0.0055618286,-0.0031433105,0.03012085,0.018493652,-0.031082153,0.020370483,-0.023971558,-0.03942871,-0.051361084,0.049591064,-0.005378723,0.028503418,0.004776001,0.0020008087,0.022506714,-0.011787415,-0.007472992,0.029327393,-0.03567505,-0.010559082,-0.034332275,-0.035186768,-0.031585693,-0.0090789795,-0.025619507,0.033233643,-0.0020256042,0.008804321,0.0104599,-0.011428833,0.0066375732,0.0135650635,-0.011734009,0.035705566,0.011253357,0.019241333,0.05645752,0.019424438,-0.026382446,0.022644043,0.015853882,0.008918762,-0.002576828,0.05508423,0.045440674,0.019454956,0.016159058,-0.0019359589,0.020996094,-0.018737793,-0.0025138855,-0.008644104,-0.017044067,0.015716553,-0.03012085,-0.016601562,-0.001080513,-0.028823853,-0.011268616,0.010475159,0.021133423,-0.018112183,0.009567261,0.042633057,0.04336548,-0.030166626,0.0128479,0.013153076,0.02947998,0.023849487,0.0018196106,-0.000014901161,0.011917114,0.009216309,0.024963379,0.02810669,-0.016403198,0.017410278,0.012527466,0.025726318,0.021835327,0.022399902,-0.009223938,-0.029647827,-0.009147644,0.003232956,-0.023147583,0.047912598,0.014259338,0.018692017,0.0024604797,0.00075769424,0.006565094,-0.008323669,-0.031677246,-0.012123108,0.031280518,-0.0010604858,-0.020751953,0.0021152496,0.022277832,0.018447876,-0.037750244,-0.0013685226,0.006954193,0.010787964,-0.028747559,-0.05847168,-0.033691406,-0.038482666,0.015197754,0.007396698,-0.009422302,0.030090332,0.0018606186,-0.008834839,0.013633728,0.017288208,-0.003982544,-0.0054397583,-0.02281189,0.0054092407,-0.011199951,-0.00076007843,-0.0049591064,0.0025291443,-0.041259766,-0.033996582,0.0066566467,-0.0073394775,-0.010398865,-0.011230469,-0.013183594,0.015541077,-0.01524353,0.010925293,-0.009536743,-0.017120361,0.000016391277,-0.0007572174,0.025543213,-0.02532959,0.010635376,-0.016036987,0.02204895,-0.01134491,0.012306213,0.010787964,0.027389526,0.026504517,0.02230835,-0.036346436,0.022979736,-0.051635742,0.036895752,0.0033187866,-0.03881836,0.0023441315,-0.0231781,-0.020828247,0.039733887,-0.030685425,-0.007671356,-0.00079774857,-0.06225586,-0.0057907104,-0.056152344,0.030090332,0.021408081,0.030197144,-0.009483337,0.0017061234,-0.010040283,0.00019419193,-0.017105103,0.010826111,-0.009109497,0.018585205,0.03744507,0.023925781,-0.0149002075,-0.008880615,-0.0069847107,-0.01638794,-0.041534424,-0.028396606,-0.015945435,0.0012702942,-0.0011730194,0.0072784424,-0.017425537,-0.033203125,0.0035495758,-0.031677246,0.028305054,0.0090408325,-0.010253906,0.011795044,-0.009086609,-0.010032654,0.015930176,-0.018951416,0.034454346,0.024475098,0.01071167,-0.022888184,-0.008918762,0.033203125,0.027252197,-0.008232117,-0.0071105957,-0.011726379,-0.027618408,-0.048309326,-0.0016002655,0.0017995834,0.019744873,0.0053596497,-0.010192871,-0.053985596,0.005809784,-0.032836914,0.012306213,0.0054397583,0.00035452843,0.01675415,-0.0023345947,-0.005001068,-0.029953003,-0.0022792816,-0.021118164,-0.0042877197,0.00856781,-0.011329651,0.016021729,0.05871582,-0.017349243,0.0098724365,-0.003921509,-0.011192322,-0.0003232956,-0.012367249,-0.014137268,-0.015342712,0.003118515,-0.004261017,-0.021957397,-0.04208374,0.009925842,0.066345215,-0.00063467026,-0.031829834,-0.0028362274,-0.031311035,0.01399231,0.035583496,-0.026977539,0.00017297268,-0.038604736,0.03161621,-0.007896423,0.014289856,-0.014717102,0.028625488,-0.025817871,-0.035583496,-0.007671356,-0.03503418,-0.009811401,-0.042510986,-0.024154663,-0.05581665,0.019805908,-0.018966675,-0.022018433,-0.009017944,0.026687622,-0.019378662,-0.08026123,-0.00022912025,0.052368164,0.0036087036,0.023117065,-0.003698349,0.03213501,0.022842407,-0.008651733,-0.022338867,0.0104522705,-0.01625061,0.0020313263,-0.025100708,0.010131836,0.024520874,-0.02456665,0.017822266,0.008293152,0.022842407,-0.011207581,0.016921997,-0.038116455,-0.0022773743,-0.019821167,0.0073280334,-0.01676941,0.001373291,0.052825928,-0.07220459,0.027374268,0.014503479,-0.0005121231,0.004135132,0.016845703,0.022521973,-0.031707764,-0.017196655,0.019470215,0.008506775,0.046173096,-0.02130127,-0.01890564,0.017044067,-0.013748169,0.0011758804,-0.013290405,-0.011962891,-0.067871094,-0.015449524,0.00472641,0.01638794,-0.011909485,-0.017669678,0.016479492,0.012191772,0.0037193298,0.008857727,-0.017532349,-0.022949219,-0.033325195,0.017868042,0.014190674,-0.012367249,-0.028060913,0.021774292,0.033843994,0.013092041,0.031036377,-0.014038086,0.0018396378,0.010375977,0.003993988,-0.013427734,0.030975342,0.0034828186,0.017044067,0.021896362,0.007850647,-0.036010742,-0.023468018,-0.010101318,-0.0041542053,0.009841919,0.0033664703,0.006259918,-0.005458832,0.017486572,-0.016494751,-0.02532959,-0.0044021606,-0.02015686,-0.025817871,-0.009765625,-0.017913818,0.016662598,-0.008811951,-0.020050049,0.017166138,0.0053901672,0.027832031,-0.001991272,-0.021102905,0.013496399,0.035064697,0.011352539,-0.05734253,-0.0017499924,-0.024032593,-0.0051574707,0.007019043,-0.04611206,0.013328552,0.022644043,-0.011894226,0.0044136047,0.016693115,0.032440186,0.008293152,-0.008041382,0.01260376,0.014755249,-0.019851685,0.03414917,-0.034729004,0.03201294,0.0041503906,0.011955261,-0.03491211,-0.013809204,-0.01789856,0.022781372,0.027709961,-0.0072898865,0.030929565,-0.016662598,0.03427124,-0.017364502,-0.033111572,0.007835388,-0.008674622,-0.009346008,0.01071167,0.0036811829,0.0115356445,0.024856567,-0.028320312,0.024032593,-0.0021095276,0.010375977,-0.008781433,-0.03262329,0.0043945312,-0.01675415,0.00008392334,-0.025177002,-0.020553589,0.010192871,-0.022369385,0.061523438,0.029968262,0.010978699,0.025375366,0.014854431,0.006916046,-0.027389526,-0.014602661,0.0050735474,-0.004119873,0.029800415,-0.024047852,0.039794922,0.042236328,0.00005531311,0.04827881,0.02067566,0.038879395,0.023406982,0.023086548,-0.022857666,-0.005569458,-0.025497437,0.011001587,-0.0256958,0.03878784,-0.014701843,0.009735107,-0.0011558533,0.01902771,-0.0065345764,0.008979797,0.05178833,0.015045166,-0.0013961792,0.044555664,0.014320374,-0.018325806,-0.015731812,-0.0024375916,0.03933716,0.0017776489,0.04095459,0.038116455,-0.0048942566,0.013313293,-0.00086927414,-0.009010315,-0.026107788,0.029159546,0.044036865,0.001326561,0.0025959015,-0.01763916,-0.014480591,-0.05734253,-0.028961182,0.02722168,0.006111145,0.016143799,-0.015686035,-0.0018367767,-0.0055999756,0.031799316,0.016983032,0.0065345764,-0.018554688,0.035339355,0.027877808,0.0028133392,0.01852417,-0.006916046,-0.0036907196,-0.031097412,-0.02722168,0.020874023,0.03463745,-0.0154800415,-0.011528015,0.009742737,-0.0071105957,0.017822266,0.011886597,-0.02822876,0.0026607513,0.01776123,0.018585205,-0.003036499,0.046203613,0.030731201,0.016357422,0.036956787,0.033599854,0.010498047,-0.033935547,0.013153076,-0.0041770935,0.0021209717,0.013572693,0.017593384,0.04043579,-0.0075912476,0.031463623,0.0011348724,-0.017852783,0.013191223,0.0031719208,-0.0016679764,-0.013656616,0.020935059,0.020187378,-0.0072517395,-0.013626099,0.008926392,-0.003791809,0.024551392,0.034454346,0.029586792,-0.013954163,0.037109375,0.0014514923,-0.0134887695,-0.012825012,0.035705566,-0.054138184,-0.011001587,-0.00573349,0.0043182373,-0.042999268,0.020889282,0.036743164,-0.0155181885,0.00003772974,0.004673004,-0.0072669983,0.002084732,0.013717651,0.017120361,0.0041122437,-0.0007915497,-0.044647217,0.018600464,0.041137695,-0.008514404,-0.006793976,-0.016433716,0.021270752,0.0058250427,-0.007858276,-0.0055503845,0.013168335,-0.019744873,-0.030563354,0.0016889572,0.025177002,0.018325806,0.026992798,-0.018417358,-0.016220093,0.010444641,0.032226562,0.0016078949,-0.01828003,-0.019454956,0.04031372,-0.031921387,0.06347656,0.033843994,-0.011756897,0.042236328,0.0113220215,-0.016571045,0.0074501038,-0.01361084,0.02947998,-0.008300781,-0.011886597,-0.0028362274,0.008094788,-0.016616821,-0.02658081,0.0030899048,-0.01737976,-0.021072388,-0.025299072,0.0011978149,-0.0046310425,0.015258789,0.04547119,0.030654907,-0.013145447,0.058013916,-0.0048942566,0.034210205,-0.017044067,-0.0005517006,0.059906006,-0.00057792664,0.05783081,0.023742676,0.026992798,-0.029510498,0.012138367,-0.0026054382,0.0002412796,0.025527954,0.02368164,-0.02281189,0.040039062,-0.008384705,0.030563354,0.012260437,0.0013456345,0.0060539246,-0.006385803,0.0003912449,0.00050497055,-0.011253357,0.013313293,0.03286743,-0.048461914,0.0149383545,-0.03967285,-0.0073509216,0.024291992,0.006996155,-0.0115356445,-0.0003604889,0.00085163116,0.008712769,-0.016494751,-0.012825012,0.008743286,0.008117676,-0.03970337,0.005569458,0.019973755,0.020828247,-0.017440796,0.020690918,0.06365967,0.0054893494,-0.0051727295,0.026992798,-0.0132751465,0.04071045,-0.008392334,0.026809692,0.01600647,0.0020561218,-0.018447876,0.00064468384,0.020080566,-0.025283813,-0.013328552,0.028381348,0.012397766,0.005027771,0.021270752,0.007270813,-0.008735657,0.017288208,-0.0131073,0.006755829,-0.036712646,-0.009780884,0.0262146,0.013008118,0.021209717,0.029586792,-0.006916046,-0.012886047,0.029891968,0.026687622,0.022201538,-0.044555664,0.0010213852,0.02645874,0.0044441223,-0.028717041,-0.01159668,0.016082764,-0.036010742,0.0012512207,0.026245117,-0.0011959076,0.015525818,-0.03845215,-0.013435364,0.033599854,-0.008018494,0.02999878,0.027542114,-0.011688232,0.03262329,-0.013244629,-0.0058898926,-0.015007019,-0.0118255615,0.011039734,0.030273438,-0.023132324,-0.037994385,0.017288208,-0.008132935,0.004673004,0.022277832,0.004611969,0.015930176,-0.019042969,0.026107788,0.0020484924,0.018493652,-0.029678345,-0.007598877,0.005958557,0.021484375,0.028823853,-0.027130127,-0.021774292,0.026184082,0.027938843,0.012237549,0.03012085,0.014160156,0.026412964,0.0065460205,-0.004886627,-0.019760132,-0.0028762817,-0.006603241,-0.007129669,0.011962891,-0.028869629,-0.030960083,0.03640747,0.027374268,-0.016784668,-0.037994385,-0.0069389343,-0.00843811,-0.011390686,0.027877808,0.0023555756,0.02658081,0.0075302124,-0.019851685,0.010848999,-0.018585205,-0.042022705,-0.0013141632,0.004585266,-0.010253906,-0.053009033,-0.004470825,-0.014694214,0.03729248,-0.036468506,-0.0056762695,-0.0026054382,0.006385803,0.005340576,-0.011940002,0.00078105927,0.012748718,-0.015945435,0.0011644363,0.024978638,-0.019241333,-0.04144287,-0.046905518,0.029632568,-0.024734497,0.041625977,0.0011358261,0.029510498,0.014457703,0.010536194,-0.0033740997,-0.008102417,-0.0045051575,0.0074806213,-0.032165527,-0.053222656,0.024154663,0.021987915,-0.008232117,-0.013595581,0.032989502,-0.016296387,-0.014297485,0.031829834,0.044921875,0.007987976,0.01864624,0.0022296906,-0.006652832,-0.017837524,0.0035591125,-0.026824951,-0.0038414001,-0.011177063,0.0031337738,0.016540527,0.010475159,0.008743286,-0.017303467,-0.021759033,0.015930176,0.021133423,0.017715454,0.016494751,0.014518738,-0.009384155,-0.008987427,-0.029449463,-0.0038700104,0.022399902,0.0049552917,0.032104492,0.013343811,-0.0059890747,-0.015655518,0.021987915,0.009391785,-0.016738892,-0.03945923,-0.004760742,-0.04812622,0.03491211,0.004470825,0.0020446777,0.0029659271,0.009719849,-0.019348145,-0.049346924,-0.0044021606,0.033111572,0.017654419,0.0029277802,-0.012428284,-0.0020198822,0.00007998943,-0.036590576,-0.0020561218,-0.03137207,-0.04159546,0.0006804466,-0.014556885,0.015960693,-0.013633728,-0.006843567,0.0055274963,-0.008682251,-0.004337311,-0.019317627,0.020584106,-0.018249512,-0.011955261,0.019760132,0.040039062,-0.021881104,-0.0012903214,-0.031585693,0.010467529,0.03933716,-0.0057029724,0.031280518,-0.032287598,0.021072388,-0.0054244995,-0.011482239,0.011642456,-0.009086609,0.027374268,-0.016738892,-0.0011205673,0.006095886,-0.0056037903,0.027297974,-0.028518677,-0.041137695,-0.0013055801,-0.022750854,-0.031951904,-0.0009889603,-0.00046014786,-0.0042495728,-0.016784668,0.029968262,-0.031433105,-0.01828003,0.03253174,-0.006286621,-0.014816284,0.0118637085,0.022537231,0.00077342987,-0.011276245,-0.008712769,-0.016052246,-0.034973145,-0.015838623,-0.00072956085,-0.020126343,0.016342163,0.015548706,-0.0039138794,0.058288574,0.016326904,0.02418518,0.02305603,0.01184082,0.031051636,0.015838623,0.04144287,-0.008399963,-0.028503418,-0.0033035278,0.015419006,-0.037109375,0.016937256,-0.024215698,-0.029083252,-0.0155181885,0.030593872,0.00066041946,0.019058228,0.02003479,0.002735138,-0.02810669,0.010375977,-0.027191162,-0.025604248,-0.029327393,0.017532349,0.041137695,0.0031871796,-0.0027599335,-0.009140015,-0.015548706,0.032073975,0.047027588,-0.009025574,-0.05645752,-0.030090332,0.022598267,-0.00447464,0.019088745,0.003068924,-0.014198303,0.017303467,0.00013017654,-0.013214111,0.01574707,-0.025238037,0.014030457,0.009170532,0.013412476,-0.010032654,0.056152344,-0.01676941,-0.010002136,-0.0041007996,0.001914978,0.042907715,0.028915405,-0.0072669983,0.012840271,0.013084412,-0.023422241,0.039093018,-0.007896423,-0.0054626465,0.012466431,0.0057868958,-0.022613525,-0.023605347,-0.0031909943,-0.0040512085],"createdAt":"2026-04-21T18:32:32.731Z","updatedAt":"2026-04-22T05:32:23.946Z","lastSeenAt":"2026-04-22T05:32:23.946Z","tsv":"'/api/v1/nfts/54/metadata':161 '/request':16,32 '0.02':15,31,90,125 '000':81 '0x8335':155 '1':198 '20':80 '2913':156 '300':200 '402':193 '54':41 '6':86 'Base USDC API' 'NFT info endpoint' 'NFT metadata API' 'access':139 'advertis':130 'ai/ml':114 'analyt':113 'api':110,132 'authent':144 'base':5,21,52,82,153 'beyond':165 'broader':99 'call':9,25,127 'caller':55 'chain':149 'challeng':168,194 'contain':66 'contract':154 'data':112,117 'decim':87 'document':164 'dozen':105 'endpoint':3,19,34,94,184 'equal':89 'exact':177,206 'field':179 'finance/web3':116 'form':192 'gate':109 'header':65 'id':40 'infer':115 'infrastructur':119 'instant':138 'json':73 'json-response' 'key':133 'limit':136 'live':186 'lowpaymentfee.com':102 'mechan':145 'metadata':2,18,37,74,178 'network':53 'nft':1,17,36 'nft-metadata' 'offer':104 'on-chain':147 'on-chain payment API' 'part':96 'pay':7,23,45 'pay-per-cal':6,22 'pay-per-call NFT' 'pay-per-request':44 'payment':64,69,140,202,207 'per':8,24,46,91,126 'platform':100,129 'post':58 'price':78,122 'proof':70 'protocol':49 'provid':174 'rate':135 'receiv':72 'request':47,59,92 'resourc':159 'respons':170 'return':76,180,188 'schema':171 'scheme':208 'second':201 'send':56 'serv':35 'settl':146 'span':111 'specif':158 'timeout':203 'token':39 'token metadata' 'uniform':123 'unit':83 'unknown':182 'usdc':13,29,68,85,151 'usdc-base' 'util':120 'version':197 'via':10,26,42,150 'well':191 'well-form':190 'x':63 'x-payment':62 'x402':11,27,48,108,167,196 'x402 NFT' 'x402-gated':107 'x402-payment'","prices":[{"id":"b1251c2b-65af-4212-bad2-4440a680e797","listingId":"c936fabe-a3e6-4572-89d3-ab57f048d514","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/54/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":"2026-04-21T18:32:32.731Z"}],"sources":[{"listingId":"c936fabe-a3e6-4572-89d3-ab57f048d514","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/54/metadata","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.731Z","lastSeenAt":"2026-04-22T05:32:23.946Z"}],"details":{"listingId":"c936fabe-a3e6-4572-89d3-ab57f048d514","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/54/metadata \\\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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/nfts/54/metadata"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/nfts/54/metadata"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching metadata for a specific NFT (token 54) programmatically","Integrating NFT display data into a dApp or marketplace UI","Agent-driven NFT data retrieval with automatic micropayment"],"bestFor":["Developers needing NFT metadata without API key management","AI agents that can settle x402 payments autonomously","Low-volume, on-demand NFT data lookups"],"notFor":["Bulk retrieval of metadata across many NFT collections (only token 54 is served at this path)","Users who cannot transact in USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.534Z"},"updatedAt":"2026-04-22T05:32:23.946Z"}}