{"id":"3b327ae5-3a2d-4854-81ca-3665008abcd7","shortId":"jv8dap","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 x402-enabled endpoint at lowpaymentfee.com serves NFT metadata for token ID 11 via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The advertised maximum cost per request is 20,000 base units of USDC, which equals $0.02 (USDC uses 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's landing page lists a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). All endpoints are priced uniformly at $0.02 per request. However, this specific listing covers only the `/api/v1/nfts/11/metadata` path, which returns NFT metadata in JSON format.\n\nNo OpenAPI schema, request/response examples, or detailed documentation were found during the crawl. The endpoint is confirmed live (HTTP 402 challenge returned), but the actual structure of the metadata response and any required POST body fields are unknown. Callers should expect a JSON payload describing NFT #11's metadata, but the exact fields are unverified.","tags":[],"capabilities":["x402-payment","nft-metadata","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["web3","nft"],"synonyms":["NFT metadata API","token metadata","NFT info endpoint","x402 NFT","Base USDC API","pay-per-request NFT","on-chain metadata"],"warnings":["No OpenAPI or schema documentation available — request body and response structure are unknown","This endpoint path is hardcoded to NFT token ID 11; generalizability to other token IDs is unverified","The broader API catalog on the landing page lists many endpoints but none have documented schemas","Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/11/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/11/metadata","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 via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing-page listing, and the endpoint serves metadata for a single hardcoded NFT ID with unknown response structure. Effectively a stub listing.","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":"2026-04-21T23:18:06.474Z","embedding":[-0.02003479,-0.0124053955,0.06488037,-0.010871887,-0.005332947,-0.03201294,0.0052261353,0.012748718,0.026016235,-0.05340576,0.028335571,-0.013008118,-0.047576904,-0.06652832,-0.017242432,0.002632141,-0.008621216,-0.004142761,-0.041107178,0.031051636,0.03466797,0.0011253357,-0.030136108,0.028533936,-0.014167786,-0.02178955,-0.0440979,-0.014465332,0.013626099,0.0023994446,0.0256958,-0.023605347,0.001490593,0.01701355,-0.025787354,-0.0071754456,0.0059547424,-0.0019350052,0.002254486,-0.026016235,0.011703491,-0.04623413,0.015510559,-0.015640259,-0.0390625,-0.030059814,-0.0009689331,-0.005630493,0.022247314,0.013145447,-0.023605347,-0.011116028,-0.017242432,0.017730713,0.00021481514,0.03253174,-0.005882263,-0.008674622,0.019638062,0.013183594,0.022155762,-0.06518555,-0.014945984,0.010848999,-0.011558533,0.05291748,-0.029663086,0.04067993,0.0047302246,0.06506348,0.036468506,0.06738281,0.014427185,0.0072517395,-0.0014381409,-0.043518066,-0.004650116,0.06921387,-0.035308838,-0.051879883,-0.012123108,-0.01448822,-0.0491333,-0.019592285,-0.025543213,-0.016067505,-0.01864624,-0.00491333,-0.030639648,0.046539307,-0.09051514,-0.014350891,-0.02796936,0.0075798035,-0.011024475,-0.0027427673,-0.013885498,0.012413025,0.027145386,0.012802124,-0.027664185,-0.0140686035,0.007572174,-0.0025367737,0.018493652,0.037902832,0.024520874,0.021987915,0.0041236877,-0.0036373138,-0.054504395,0.014663696,-0.020996094,-0.025421143,-0.0000039339066,0.0009365082,-0.041137695,0.041870117,-0.01361084,0.029006958,-0.054107666,0.044952393,0.0025138855,0.0044555664,-0.009925842,-0.03881836,-0.021713257,0.030654907,-0.005592346,0.0067749023,0.029541016,0.00077724457,0.013206482,-0.01436615,-0.046844482,-0.010574341,-0.050567627,-0.050689697,-0.039276123,-0.008895874,0.00894165,-0.015853882,0.023254395,0.042266846,-0.100097656,-0.008560181,-0.036102295,0.021530151,-0.029647827,0.007980347,-0.016052246,0.02784729,-0.007293701,-0.025650024,0.011314392,-0.04598999,0.014167786,-0.004623413,0.00025987625,0.05505371,-0.0033226013,0.017471313,0.019470215,0.003894806,0.04397583,0.031677246,0.0047836304,-0.07373047,-0.06933594,0.011192322,0.0062713623,-0.022354126,-0.0050621033,-0.0024776459,-0.011947632,-0.053131104,0.0048828125,-0.027664185,0.016479492,-0.029724121,0.0069618225,-0.04675293,0.011459351,0.0069503784,-0.06341553,-0.015579224,-0.02420044,0.081848145,0.037506104,0.030090332,-0.0026397705,0.0020599365,0.027145386,0.026138306,-0.045654297,-0.026824951,0.013641357,-0.030181885,0.01689148,-0.012886047,0.03451538,-0.00856781,0.034973145,0.05682373,0.0010929108,-0.00042510033,-0.02142334,-0.08459473,-0.03717041,-0.006755829,0.031829834,0.020736694,-0.0062561035,0.023483276,-0.021270752,-0.020095825,0.011833191,0.0022029877,0.0071258545,0.033416748,0.0037822723,-0.00983429,0.014923096,0.017791748,-0.047729492,0.034332275,-0.0032424927,0.012886047,-0.004295349,-0.037200928,0.03326416,0.033935547,-0.0044784546,0.025024414,-0.03186035,0.014144897,-0.046539307,-0.013366699,0.0032215118,0.0032215118,-0.0049057007,-0.030059814,-0.01889038,0.019470215,-0.031433105,-0.008895874,-0.02973938,-0.06652832,0.02708435,0.04953003,0.0128479,0.010169983,-0.010269165,-0.044403076,-0.001414299,-0.07293701,0.057403564,0.06427002,-0.0062561035,-0.012069702,0.041503906,-0.02458191,-0.037506104,-0.0070152283,-0.01348114,-0.051727295,0.007762909,-0.0009150505,-0.048797607,-0.004432678,0.0012407303,0.013885498,0.025009155,-0.043762207,-0.05834961,0.018798828,-0.009407043,-0.0037403107,-0.000009715557,-0.036743164,0.009536743,0.005016327,0.023880005,-0.0054512024,-0.0013828278,-0.00945282,0.031585693,0.007949829,0.03466797,0.0079956055,-0.0074806213,0.0016002655,0.018325806,-0.035888672,-0.030456543,-0.022521973,0.06628418,-0.052337646,0.039733887,-0.0099105835,0.009307861,0.02998352,0.016555786,-0.038146973,0.0038604736,0.022521973,0.024246216,0.02897644,0.014968872,-0.0340271,0.020599365,0.07006836,-0.03591919,-0.0052948,0.021636963,0.010948181,0.03817749,-0.007835388,-0.04711914,-0.02720642,0.010414124,-0.04333496,0.039855957,-0.030563354,0.0052223206,-0.0022640228,0.011154175,-0.014167786,-0.00016438961,-0.013313293,0.008529663,-0.008224487,0.010810852,-0.011543274,0.0073432922,0.0141067505,0.0146865845,-0.02015686,0.01512146,0.03918457,0.05618286,-0.03668213,-0.03491211,-0.03982544,-0.036865234,0.0024776459,0.0053596497,0.029220581,0.0039634705,0.036499023,-0.027023315,-0.010284424,0.023422241,0.019165039,0.0368042,0.024093628,-0.0042533875,-0.061401367,-0.026626587,-0.03286743,-0.040039062,0.038513184,0.029083252,-0.010643005,0.064941406,-0.015029907,-0.041107178,-0.04248047,0.019485474,-0.07727051,-0.041900635,0.023284912,-0.020690918,-0.007583618,0.013542175,0.00554657,0.011062622,0.01828003,0.030654907,0.012542725,0.068115234,0.020950317,-0.009773254,0.002828598,0.026626587,0.031341553,0.008644104,-0.03475952,-0.035614014,-0.03201294,0.03503418,-0.023757935,-0.04397583,-0.052612305,0.048431396,0.05267334,0.08886719,0.0124435425,0.013725281,0.055877686,-0.008605957,0.0006451607,-0.03881836,-0.01687622,-0.032958984,-0.009025574,0.03427124,0.0012521744,0.022567749,-0.0390625,0.024902344,-0.022109985,0.02204895,0.003370285,0.045074463,0.021087646,-0.014671326,0.03253174,0.015365601,0.044189453,0.07562256,-0.006603241,0.049835205,0.0008482933,-0.06793213,-0.008865356,0.013023376,-0.0059814453,-0.00014972687,-0.056243896,-0.0385437,0.02520752,0.009635925,-0.03866577,-0.008895874,0.008857727,0.023666382,0.035461426,0.0001540184,0.00036525726,-0.021606445,-0.024673462,-0.06585693,-0.0003504753,-0.048828125,-0.0079956055,0.03930664,-0.008666992,0.012176514,-0.011451721,0.0050239563,0.004787445,0.016204834,0.013130188,-0.0019721985,-0.03050232,0.0037574768,0.0072135925,0.01838684,0.009796143,0.026977539,0.017852783,0.04449463,0.021270752,0.008987427,-0.024032593,-0.07409668,0.041778564,-0.027023315,-0.0050201416,0.04537964,-0.013931274,-0.008506775,-0.017211914,-0.018829346,-0.026733398,0.041168213,-0.03274536,0.01322937,0.024658203,-0.0051116943,-0.036315918,-0.05618286,-0.01474762,-0.033111572,0.038909912,0.008255005,0.017044067,-0.022842407,-0.013511658,0.000279665,0.009727478,0.0362854,-0.012786865,-0.022247314,-0.018814087,-0.03543091,0.00919342,-0.016479492,0.018676758,-0.023605347,-0.017974854,0.034088135,0.018463135,0.01184082,0.017211914,0.01713562,0.034423828,-0.01777649,0.023101807,0.031585693,0.07397461,-0.0013494492,-0.004447937,-0.030532837,0.019104004,0.0004003048,0.036346436,-0.040130615,-0.004070282,-0.0023765564,0.03555298,0.02720642,-0.03656006,0.024383545,-0.021011353,-0.042419434,-0.058685303,0.045959473,-0.0030879974,0.026046753,0.0037651062,0.0025863647,0.02861023,-0.002368927,-0.00944519,0.031707764,-0.032104492,-0.019561768,-0.022109985,-0.031311035,-0.018585205,-0.015342712,-0.021896362,0.036499023,-0.01171875,0.01890564,0.0149002075,-0.015853882,0.00029683113,0.023361206,-0.016204834,0.03189087,0.01727295,0.023910522,0.064086914,0.020095825,-0.02609253,0.029174805,0.017471313,0.005420685,-0.0082473755,0.049804688,0.040130615,0.025848389,0.0061912537,0.0006747246,0.012359619,-0.01626587,-0.00894165,-0.01789856,-0.0211792,0.015083313,-0.042907715,-0.010795593,0.0055389404,-0.026306152,-0.011428833,0.009117126,0.014862061,-0.022766113,0.015640259,0.045318604,0.046966553,-0.04260254,0.0011911392,0.010215759,0.040802002,0.019958496,-0.003396988,0.0013475418,0.013847351,-0.0026283264,0.015960693,0.019470215,-0.020431519,0.031829834,0.019439697,0.02961731,0.01663208,0.016357422,-0.007751465,-0.029937744,-0.0029277802,0.00016891956,-0.019592285,0.04034424,0.012290955,0.017105103,0.0043182373,-0.0064849854,0.0021896362,-0.0062828064,-0.027816772,-0.0024642944,0.036132812,-0.011108398,-0.029144287,-0.00002849102,0.020080566,0.016525269,-0.028656006,-0.01096344,0.016693115,0.016952515,-0.028762817,-0.051849365,-0.03894043,-0.029342651,0.020401001,0.0059432983,-0.005870819,0.033721924,0.0012130737,-0.006099701,0.008178711,0.01725769,-0.0128479,-0.018936157,-0.028182983,0.0008215904,-0.017425537,-0.0030155182,-0.012504578,-0.0032653809,-0.04055786,-0.034698486,-0.0006828308,-0.005672455,-0.01940918,-0.008094788,-0.011634827,0.012176514,-0.014762878,0.013687134,-0.020019531,-0.024765015,-0.004966736,0.003063202,0.029693604,-0.025619507,0.013267517,-0.004486084,0.03768921,-0.015701294,0.006149292,0.01928711,0.023239136,0.022064209,0.023529053,-0.04034424,0.028762817,-0.056243896,0.035583496,0.020126343,-0.0390625,0.01360321,-0.023834229,-0.026687622,0.036315918,-0.024917603,-0.013626099,-0.009819031,-0.064819336,0.0026378632,-0.046447754,0.034240723,0.017532349,0.036468506,-0.013366699,0.0062217712,-0.0049476624,0.0046424866,-0.015464783,0.0154418945,-0.0060272217,0.013511658,0.035125732,0.015640259,-0.0178833,-0.0077323914,-0.000036597252,-0.0141067505,-0.03668213,-0.027862549,-0.010444641,-0.009254456,-0.000808239,0.013542175,-0.014663696,-0.039367676,0.0048294067,-0.026855469,0.020828247,0.015007019,-0.0037727356,0.014122009,-0.0069236755,-0.011421204,0.01399231,-0.0127334595,0.041748047,0.024093628,0.014289856,-0.025299072,-0.0070533752,0.031051636,0.026123047,-0.0060539246,0.0055885315,-0.01007843,-0.025985718,-0.0501709,0.00349617,0.0049324036,0.016983032,-0.0013895035,-0.013084412,-0.04916382,0.009147644,-0.029693604,0.011421204,0.012420654,0.004878998,0.014411926,-0.009315491,0.0017032623,-0.035369873,-0.011253357,-0.020080566,0.0055503845,0.008796692,-0.0038223267,0.025817871,0.06427002,-0.014762878,0.00020003319,-0.008468628,-0.0010461807,0.008872986,-0.0112838745,-0.0007352829,-0.012931824,0.013511658,0.0045433044,-0.025268555,-0.0435791,0.010406494,0.06341553,0.0021381378,-0.028564453,-0.0046310425,-0.029815674,0.0023899078,0.026367188,-0.018753052,-0.004421234,-0.041992188,0.034942627,-0.020889282,0.0026760101,-0.010673523,0.030380249,-0.010192871,-0.025665283,-0.0075645447,-0.03286743,-0.0010957718,-0.037902832,-0.023757935,-0.057617188,0.019195557,-0.020187378,-0.037719727,-0.008956909,0.034851074,-0.018356323,-0.08630371,0.0002373457,0.04421997,0.0050964355,0.021987915,-0.00054740906,0.033447266,0.025665283,-0.0019741058,-0.007724762,0.008239746,-0.016159058,-0.006210327,-0.026382446,0.007221222,0.020004272,-0.017959595,0.008514404,0.007987976,0.019088745,-0.0065612793,0.016281128,-0.026443481,0.006954193,-0.028244019,0.012420654,-0.015159607,0.007484436,0.058441162,-0.07397461,0.025238037,0.008369446,-0.005672455,0.0103302,0.013153076,0.01713562,-0.0317688,-0.0054130554,0.02319336,0.0104904175,0.05114746,-0.02798462,-0.0077323914,0.021591187,-0.020629883,0.0055618286,-0.012763977,-0.014411926,-0.060913086,-0.015914917,0.006832123,0.0141067505,-0.005962372,-0.016342163,0.015487671,0.013008118,-0.00032615662,0.021911621,-0.008094788,-0.025924683,-0.033569336,0.020385742,0.010925293,-0.0062065125,-0.031433105,0.02645874,0.030731201,0.014823914,0.026168823,-0.014167786,0.0008354187,0.00655365,0.002670288,-0.0035820007,0.031707764,0.001461029,0.012512207,0.028045654,-0.000026583672,-0.047454834,-0.02217102,-0.016555786,-0.0075912476,0.00026488304,0.004676819,0.00046277046,0.0006990433,0.018615723,-0.018310547,-0.031951904,-0.0077209473,-0.024108887,-0.01727295,0.003227234,-0.021224976,0.015060425,-0.013221741,-0.013969421,0.014183044,-0.0009293556,0.026626587,-0.00016665459,-0.011558533,0.014846802,0.03857422,0.010475159,-0.04208374,0.003622055,-0.02734375,-0.012054443,0.008666992,-0.037353516,0.02154541,0.026412964,-0.012496948,0.009468079,0.0049438477,0.032104492,0.006893158,-0.00080394745,0.016540527,0.018432617,-0.024246216,0.036376953,-0.03756714,0.03366089,0.010444641,0.0065307617,-0.027816772,-0.019012451,-0.032073975,0.024261475,0.018051147,-0.0024929047,0.032287598,-0.021331787,0.040161133,-0.014190674,-0.02998352,0.0038471222,-0.009056091,-0.009735107,0.014526367,0.010025024,0.012748718,0.014671326,-0.028533936,0.021377563,-0.007091522,0.009124756,-0.009346008,-0.036621094,0.0071640015,-0.018341064,-0.0015468597,-0.017684937,-0.018692017,0.012413025,-0.022979736,0.05923462,0.020828247,0.012168884,0.029663086,0.012245178,0.0054016113,-0.021865845,-0.01777649,0.004962921,-0.009819031,0.02418518,-0.03125,0.028503418,0.05178833,0.0029659271,0.04333496,0.024368286,0.035705566,0.014785767,0.015159607,-0.021957397,-0.008918762,-0.014328003,0.009124756,-0.025650024,0.04385376,-0.013626099,0.014785767,0.0030956268,0.027145386,-0.005592346,0.008773804,0.055725098,0.016235352,0.0049743652,0.041809082,0.017486572,-0.020065308,-0.003929138,-0.0067214966,0.044525146,0.011802673,0.03756714,0.03363037,-0.010124207,-0.0027046204,-0.007270813,-0.02532959,-0.017974854,0.037384033,0.038726807,-0.0014429092,0.012542725,-0.022415161,-0.013847351,-0.053375244,-0.034301758,0.017471313,0.0049324036,0.017532349,-0.010665894,-0.008216858,-0.009254456,0.022003174,0.014350891,-0.005607605,-0.011207581,0.042236328,0.03479004,0.0036716461,0.019210815,-0.015319824,-0.0046043396,-0.028167725,-0.030639648,0.014091492,0.030975342,-0.01751709,-0.014724731,0.0055274963,-0.0011606216,0.024414062,0.014404297,-0.018569946,-0.0054244995,0.012886047,0.005596161,-0.0019407272,0.04888916,0.0423584,0.021911621,0.027801514,0.026733398,0.020462036,-0.043395996,0.018875122,0.0038776398,0.008476257,0.016357422,0.010734558,0.035461426,-0.014602661,0.042663574,-0.0024585724,-0.020217896,0.011405945,0.0065841675,-0.00012493134,-0.017562866,0.02519226,0.016113281,-0.017440796,-0.009407043,0.0062789917,-0.012199402,0.020095825,0.030639648,0.029922485,-0.011024475,0.04736328,0.007724762,-0.009178162,-0.019195557,0.028579712,-0.060180664,-0.011383057,-0.0036811829,0.0006108284,-0.041137695,0.027130127,0.03262329,-0.0010871887,-0.010971069,0.00178051,-0.016723633,0.0059928894,0.016479492,0.014846802,0.014671326,0.00028300285,-0.03741455,0.027175903,0.035614014,-0.008232117,0.0001155138,-0.009155273,0.017990112,0.0008792877,-0.013671875,-0.010955811,0.012123108,-0.021987915,-0.025787354,0.003993988,0.015541077,0.017120361,0.030853271,-0.01335144,-0.015586853,0.013153076,0.036132812,0.0055007935,-0.011413574,-0.016174316,0.03488159,-0.03100586,0.051574707,0.037475586,-0.011474609,0.042785645,0.010040283,-0.011505127,0.0019035339,0.00017797947,0.035125732,-0.012023926,-0.010505676,0.000934124,0.0178833,-0.021774292,-0.024368286,0.004878998,-0.023895264,-0.02557373,-0.018814087,0.0074806213,-0.012489319,0.009468079,0.046539307,0.033721924,-0.0129852295,0.053375244,-0.008666992,0.0345459,-0.012413025,-0.01436615,0.056518555,0.008430481,0.051696777,0.02432251,0.031158447,-0.028060913,0.008010864,0.0028152466,-0.0039596558,0.025665283,0.019165039,-0.025161743,0.036315918,-0.010894775,0.029251099,0.012542725,0.007320404,0.0041770935,-0.0030670166,-0.0039749146,-0.00031638145,-0.005420685,0.014572144,0.035949707,-0.045440674,0.00932312,-0.035491943,-0.0063934326,0.019958496,-0.00036907196,0.00035858154,-0.0032367706,0.0029258728,0.0059318542,-0.01713562,-0.013206482,0.0070114136,0.0025463104,-0.049194336,-0.0073242188,0.012451172,0.025146484,-0.019073486,0.014045715,0.057647705,0.0022850037,-0.013908386,0.026382446,-0.017181396,0.037628174,-0.0146865845,0.022659302,0.0149002075,0.0046310425,-0.015670776,-0.0034656525,0.0020046234,-0.018814087,0.0022678375,0.022506714,0.0069007874,0.017089844,0.018707275,0.013969421,-0.013961792,0.02027893,-0.008117676,0.013748169,-0.031951904,-0.018173218,0.019073486,0.00869751,0.025787354,0.022766113,0.010047913,-0.009986877,0.031082153,0.02746582,0.0104599,-0.049346924,0.0042304993,0.026016235,0.0047683716,-0.030166626,-0.011489868,0.0082473755,-0.04171753,-0.0013427734,0.033111572,-0.002670288,0.019546509,-0.05130005,-0.008911133,0.034210205,-0.0037899017,0.024871826,0.020523071,-0.021011353,0.029296875,-0.009239197,-0.012031555,-0.012168884,-0.0018281937,0.011505127,0.025817871,-0.022613525,-0.031951904,0.027542114,-0.011894226,0.008560181,0.020065308,0.0024166107,0.0093688965,-0.016296387,0.02078247,0.003856659,0.022979736,-0.028289795,-0.00844574,0.00548172,0.023284912,0.028808594,-0.032562256,-0.021011353,0.02670288,0.021438599,0.01133728,0.028579712,0.0028533936,0.033966064,0.013710022,-0.006576538,-0.011962891,0.0067634583,-0.0059776306,-0.00087308884,0.01675415,-0.028686523,-0.028137207,0.035705566,0.01777649,-0.015045166,-0.03778076,-0.009132385,-0.012809753,-0.01473999,0.024047852,0.0016231537,0.034362793,0.0037899017,-0.014884949,0.0025463104,-0.027801514,-0.041870117,-0.0022773743,-0.0009493828,-0.008728027,-0.04940796,0.0043296814,-0.011428833,0.034851074,-0.031341553,-0.011039734,0.0022144318,0.0010595322,0.009063721,-0.01991272,-0.010063171,0.0064735413,-0.011772156,0.005973816,0.030334473,-0.014152527,-0.035339355,-0.036010742,0.031677246,-0.020553589,0.031402588,-0.0036411285,0.03314209,0.019332886,0.013366699,-0.0009946823,-0.0050621033,-0.0072135925,0.0039787292,-0.028045654,-0.053863525,0.023849487,0.024261475,-0.012710571,-0.025497437,0.028640747,-0.014907837,-0.014549255,0.03149414,0.046295166,0.0073509216,0.010345459,0.0016927719,0.0010108948,-0.009056091,0.00023949146,-0.026123047,-0.0021858215,-0.011642456,-0.00012469292,0.012062073,0.010177612,0.015266418,-0.015090942,-0.026260376,0.024887085,0.018997192,0.023605347,0.014007568,0.014984131,-0.0062446594,-0.014381409,-0.02633667,-0.004432678,0.021636963,-0.0035552979,0.034423828,0.0151901245,-0.0029582977,-0.018707275,0.025604248,-0.0014286041,-0.012313843,-0.037017822,-0.0065307617,-0.051879883,0.029724121,-0.0038070679,0.011016846,-0.0037574768,0.013809204,-0.024459839,-0.040527344,-0.0105896,0.027328491,0.011734009,0.0022640228,-0.02017212,-0.003168106,-0.00045895576,-0.03289795,0.000787735,-0.040802002,-0.038513184,0.0047912598,-0.0128479,0.011856079,-0.017532349,-0.007701874,0.0014791489,-0.008666992,0.0009651184,-0.01966858,0.014640808,-0.011444092,-0.011077881,0.013191223,0.026657104,-0.016647339,0.0034751892,-0.027145386,0.014541626,0.045074463,0.0014877319,0.026504517,-0.039154053,0.020553589,-0.0067634583,-0.004398346,0.01210022,0.00036168098,0.011398315,-0.014846802,-0.0050621033,0.0017089844,-0.004573822,0.033599854,-0.03286743,-0.038635254,0.00932312,-0.01676941,-0.022567749,0.00044226646,0.0036411285,-0.0006175041,-0.015823364,0.03326416,-0.033416748,-0.020050049,0.02545166,-0.0026416779,-0.01448822,0.007545471,0.030883789,0.0047454834,-0.008392334,-0.0031204224,-0.015449524,-0.04437256,-0.010353088,-0.00017297268,-0.026123047,0.009162903,0.018829346,-0.0029754639,0.06072998,0.015083313,0.01977539,0.017852783,0.013931274,0.02947998,0.005783081,0.04537964,-0.0102005005,-0.018615723,-0.004436493,0.012924194,-0.034088135,0.020111084,-0.015129089,-0.036010742,-0.018234253,0.026046753,-0.0039749146,0.02670288,0.02319336,0.0040893555,-0.032226562,0.011413574,-0.03137207,-0.02772522,-0.023452759,0.022369385,0.048217773,0.0027923584,0.004463196,-0.007335663,-0.0034751892,0.03390503,0.03894043,-0.014923096,-0.04916382,-0.02909851,0.032470703,-0.00856781,0.019210815,0.0129470825,-0.009803772,0.017242432,-0.0019035339,-0.016464233,0.016433716,-0.023666382,0.010902405,0.007522583,0.0031967163,-0.011726379,0.051086426,-0.016448975,-0.009529114,0.00026106834,0.0036849976,0.039215088,0.03036499,-0.0057640076,0.0047035217,0.0058250427,-0.027008057,0.04638672,0.0020065308,-0.0062026978,0.007713318,0.0034313202,-0.01889038,-0.01927185,-0.0024337769,-0.0070648193],"createdAt":"2026-04-21T18:32:27.325Z","updatedAt":"2026-04-22T23:02:49.003Z","lastSeenAt":"2026-04-22T23:02:49.003Z","tsv":"'/api/v1/nfts/11/metadata':166 '/request':16,32 '0.02':15,31,85,156 '000':78 '0x8335':61 '11':46,221 '20':77 '2913':62 '402':194 '6':88 'Base USDC API' 'NFT info endpoint' 'NFT metadata API' 'actual':199 'advertis':71 'ai/ml':130 'analysi':133 'analyt':129 'api':91,126 'attach':100 'base':5,21,56,79 'base-network' 'bodi':209 'broad':119 'call':9,25,125 'caller':98,213 'catalog':120 'challeng':195 'classif':135 'confirm':191 'contract':60 'convers':149 'cost':73 'cover':163 'crawl':187 'data':128 'decim':89 'describ':219 'detail':181 'document':182 'embed':136 'enabl':36 'endpoint':3,19,37,151,189 'equal':84 'estim':143 'exact':67,226 'exact-pay':66 'exampl':179 'exchang':140 'expect':215 'feed':139 'field':210,227 'finance/web3':137 'format':174 'found':184 'gas':142 'geocod':147 'header':105 'howev':159 'http':193 'id':45 'infer':131 'infrastructur':145 'json':173,217 'key':92 'land':115 'limit':95 'list':117,162 'live':192 'lowpaymentfee.com':39 'maximum':72 'metadata':2,18,42,171,203,223 'network':57 'nft':1,17,41,170,220 'nft-metadata' 'no-api-key' 'on-chain metadata' 'openapi':176 'page':116 'path':167 'pay':7,23,123 'pay-per-cal':6,22,122 'pay-per-call' 'pay-per-request NFT' 'payload':218 'payment':51,68,104,110 'per':8,24,74,124,157 'post':49,208 'price':138,153 'proof':111 'provid':113 'rate':94,141 'request':50,75,158 'request/response':178 'requir':97,207 'respons':204 'return':169,196 'schema':177 'scheme':69 'sentiment':132 'serv':40 'settl':53 'simpli':99 'span':127 'specif':161 'structur':200 'summar':134 'token':44 'token metadata' 'uniform':154 'unit':80 'unknown':212 'unverifi':229 'usdc':13,29,59,82,86 'usdc-settlement' 'use':58,87 'util':146 'valid':108,148 'via':10,26,47 'x':103 'x-payment':102 'x402':11,27,35,65,109 'x402 NFT' 'x402-enabled':34 'x402-payment'","prices":[{"id":"f4df0d17-6624-43f0-8b14-e0ba9c2929f2","listingId":"3b327ae5-3a2d-4854-81ca-3665008abcd7","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/11/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":"2026-04-21T18:32:27.325Z"}],"sources":[{"listingId":"3b327ae5-3a2d-4854-81ca-3665008abcd7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/11/metadata","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.325Z","lastSeenAt":"2026-04-22T23:02:49.003Z"}],"details":{"listingId":"3b327ae5-3a2d-4854-81ca-3665008abcd7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/11/metadata \\\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":"Endpoint returns HTTP 402 with x402 challenge advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/11/metadata"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/nfts/11/metadata"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/11/metadata"}],"useCases":["Retrieving metadata for NFT token #11 from this provider","Integrating pay-per-call NFT data into an agent workflow without managing API keys","Demonstrating x402 micropayment protocol usage on Base"],"bestFor":["Agents needing on-demand NFT metadata with no subscription","Developers experimenting with x402 payment protocol on Base","Low-volume, pay-as-you-go NFT data retrieval"],"notFor":["Bulk NFT metadata retrieval across many collections (only serves token 11 at this path)","Users who need free or pre-paid API access without crypto wallets","Production systems requiring documented, stable API schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:59.576Z"},"updatedAt":"2026-04-22T23:02:49.003Z"}}