{"id":"75301220-68cb-42c8-b0b3-a5b6084f098c","shortId":"4hsYda","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/42` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific resource appears to serve NFT-related data (inferred from the URL path `/nfts/42`), though no detailed documentation or response schema is available beyond the x402 challenge and the site's landing page.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units, which at 6 decimals equals $0.02 USD. The endpoint accepts POST requests, returns `application/json`, and requires no API keys or prior registration — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The challenge timeout is 300 seconds.\n\nThe broader lowpaymentfee.com platform advertises uniform $0.02/request pricing across all endpoints, with no rate limits and no minimum commitments. However, the crawled documentation pages (`/api`, `/pricing`, `/README`) all resolve to a minimal \"Connect wallet\" page, so there is no detailed API documentation, request/response schemas, or usage examples available beyond what the x402 challenge itself provides.","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 metadata","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No API documentation available — /api, /pricing, and /README pages all return only a 'Connect wallet' stub.","No request body schema or response schema documented; functionality inferred solely from URL path '/api/v1/nfts/42'.","The specific data returned by this NFT endpoint is unknown; callers should test with a small payment first."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/42","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no API documentation, no request/response schema, no examples, and the NFT-specific functionality is only inferred from the URL path. The crawled docs pages are all empty wallet-connect stubs.","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":"2026-04-21T23:39:21.691Z","embedding":[-0.031051636,-0.027496338,0.05307007,0.0061187744,0.013847351,-0.021820068,0.00012743473,0.016647339,0.04385376,-0.064086914,0.04309082,-0.027313232,-0.03918457,-0.053100586,-0.02279663,0.013328552,-0.013175964,-0.0064964294,-0.041259766,0.029342651,0.049743652,-0.012062073,-0.019363403,0.029708862,-0.004383087,-0.0046653748,-0.001332283,0.0042648315,-0.011634827,-0.020767212,0.016036987,-0.023086548,-0.011260986,-0.0036182404,-0.011871338,0.00038576126,-0.0046043396,0.021362305,0.004901886,-0.008232117,-0.008544922,-0.060577393,0.01701355,-0.010475159,-0.03125,-0.023269653,0.011260986,-0.025482178,-0.008384705,-0.00051546097,-0.0287323,-0.014015198,-0.010665894,0.0041885376,-0.0041656494,0.025054932,0.0061149597,-0.007007599,0.011260986,0.016540527,0.002986908,-0.06939697,0.00068330765,0.0035133362,0.02822876,0.05307007,-0.0074272156,0.047454834,-0.009719849,0.091918945,0.016937256,0.047332764,0.02848816,0.00856781,0.0151901245,-0.013977051,0.003376007,0.044189453,-0.014099121,-0.031677246,-0.01133728,-0.02684021,-0.05065918,-0.016052246,-0.020828247,-0.057922363,-0.016983032,0.021942139,-0.04095459,0.046875,-0.0847168,-0.0058784485,-0.021194458,0.015930176,-0.017837524,-0.010620117,-0.009185791,0.0022201538,0.017959595,0.0031795502,-0.003326416,-0.026657104,0.025177002,0.0016880035,0.05593872,0.05215454,0.027191162,0.011306763,-0.0024700165,-0.011009216,-0.017425537,0.019210815,0.005519867,-0.01586914,0.019866943,-0.0027694702,-0.036621094,0.041381836,-0.017715454,0.03466797,-0.045196533,0.054473877,-0.0037593842,0.0074272156,0.008926392,-0.034179688,-0.018966675,0.004688263,-0.016418457,-0.012664795,0.04083252,0.00033426285,0.019882202,-0.02003479,-0.036956787,0.01637268,-0.025299072,-0.018859863,-0.05392456,-0.011375427,0.0317688,-0.028381348,0.025009155,0.045135498,-0.079956055,0.0124435425,-0.03817749,0.028579712,-0.02041626,0.0038776398,0.013946533,0.023513794,0.009552002,-0.018844604,-0.021621704,-0.03918457,-0.0074501038,0.03137207,-0.012420654,0.04473877,-0.010978699,0.026397705,0.036010742,0.01322937,0.030685425,0.052001953,-0.009857178,-0.08282471,-0.074279785,-0.014328003,0.0064315796,-0.017318726,-0.01979065,0.00497818,-0.0046157837,-0.07458496,-0.023788452,-0.00806427,0.015571594,-0.038909912,-0.009742737,-0.0657959,-0.0018787384,-0.0029582977,-0.054473877,-0.010444641,-0.023971558,0.043914795,0.0181427,0.02154541,0.025253296,0.00137043,0.04360962,0.035980225,-0.015655518,-0.026473999,0.027664185,-0.03036499,0.042236328,0.0039520264,0.027877808,-0.011192322,0.032470703,0.07128906,0.0041275024,-0.032684326,-0.008773804,-0.064819336,-0.030670166,-0.018508911,0.011009216,0.017120361,-0.018035889,0.011436462,-0.046844482,-0.017089844,-0.0015850067,0.011062622,0.018417358,0.047180176,0.01134491,0.009635925,0.030914307,0.024246216,-0.04660034,0.027893066,0.014785767,0.008232117,-0.009155273,-0.031585693,0.030136108,0.022506714,-0.02407837,0.01411438,-0.03869629,0.013420105,-0.02519226,-0.013671875,-0.00016820431,-0.0017499924,-0.02947998,-0.047027588,-0.006198883,0.018936157,-0.007686615,-0.02758789,-0.05316162,-0.076049805,0.048614502,0.058288574,0.016601562,0.0048675537,-0.004360199,-0.038726807,-0.016326904,-0.07171631,0.060913086,0.07519531,-0.005584717,-0.0025367737,0.031219482,-0.01977539,-0.04067993,-0.015266418,-0.0064811707,-0.036193848,-0.016174316,0.01574707,-0.045654297,0.009788513,0.02557373,0.022094727,0.048095703,-0.03942871,-0.047302246,-0.010131836,-0.010917664,0.01701355,-0.025619507,-0.03265381,0.0010557175,0.02571106,0.03390503,0.01146698,-0.011650085,-0.0066184998,0.0032806396,0.009567261,0.014137268,-0.013832092,-0.022384644,0.021408081,-0.0062446594,-0.043273926,0.007369995,-0.0095825195,0.04626465,-0.047943115,0.039093018,-0.01689148,-0.0005917549,0.045776367,-0.011268616,-0.05368042,-0.008224487,0.0132369995,0.03479004,0.055389404,0.014152527,-0.0011720657,-0.012962341,0.06536865,-0.032348633,-0.013679504,0.016494751,0.03765869,0.0491333,0.016616821,-0.05630493,-0.032836914,0.0073509216,-0.029266357,0.04421997,-0.011741638,0.03414917,-0.010406494,0.016235352,-0.020767212,-0.002960205,-0.029876709,0.012687683,-0.0071144104,0.0075149536,-0.011039734,-0.0090408325,0.008018494,0.013252258,-0.018798828,0.0077438354,0.042907715,0.022506714,-0.025482178,-0.030944824,-0.03201294,-0.027664185,0.0046920776,0.010307312,0.026046753,0.0118255615,0.047851562,-0.03933716,0.002565384,0.019134521,0.011764526,0.039520264,0.01890564,-0.0057907104,-0.07720947,-0.05407715,-0.023757935,-0.048217773,0.032226562,0.038879395,0.004699707,0.054473877,-0.00042438507,-0.012771606,-0.040374756,0.028533936,-0.058380127,-0.014923096,0.044128418,-0.012817383,-0.025375366,0.020217896,0.003156662,0.016204834,0.03933716,0.029037476,0.011917114,0.06994629,0.028564453,0.01675415,-0.0079193115,0.02456665,0.040374756,0.0055503845,-0.013755798,-0.03375244,-0.03274536,0.031585693,-0.02772522,-0.03225708,-0.061798096,0.062347412,0.03173828,0.086120605,0.013557434,0.005077362,0.049682617,-0.013618469,-0.0022354126,-0.031051636,-0.025604248,-0.038330078,-0.026779175,0.02607727,-0.0057029724,-0.001490593,-0.038726807,0.010398865,0.016418457,0.011558533,-0.03112793,0.059692383,-0.005996704,-0.019210815,0.027816772,0.0039100647,0.050964355,0.06304932,-0.034423828,0.039916992,-0.0033988953,-0.03765869,0.0039138794,0.025253296,-0.00012779236,-0.01184082,-0.058288574,-0.032440186,0.0002322197,-0.007858276,-0.0423584,-0.008384705,-0.0005068779,0.033843994,0.040863037,-0.006072998,-0.01663208,-0.00868988,0.00881958,-0.048339844,0.0026283264,-0.041900635,0.009803772,0.03253174,-0.012062073,0.000021219254,-0.011604309,0.008407593,-0.0038166046,0.027267456,0.012931824,0.017318726,-0.045166016,0.025314331,-0.009941101,0.034240723,-0.00018632412,0.03918457,0.03366089,0.02822876,0.03894043,0.023345947,-0.023925781,-0.059051514,0.0345459,-0.04244995,0.00081014633,0.025405884,-0.016036987,0.0038967133,-0.011627197,-0.027770996,-0.018951416,0.015357971,-0.028869629,0.00015306473,0.028427124,-0.03149414,-0.024856567,-0.050079346,-0.03955078,0.007858276,0.05819702,0.032226562,0.02319336,-0.044952393,-0.018310547,0.023284912,-0.0017471313,0.028030396,-0.013595581,-0.01574707,-0.014099121,-0.029647827,-0.01499939,-0.022354126,0.040527344,-0.012664795,-0.004688263,0.02456665,0.0036201477,0.0025787354,0.0025596619,-0.008377075,0.019485474,-0.03363037,0.018188477,-0.0024909973,0.048339844,0.0118637085,-0.012664795,-0.040405273,0.051086426,0.0048942566,0.03375244,-0.04928589,0.0006661415,-0.009155273,0.028869629,-0.0024414062,-0.021194458,0.008026123,-0.00071907043,-0.037200928,-0.07922363,0.034332275,-0.0036373138,0.029190063,0.029953003,0.0031738281,0.03945923,-0.0181427,0.0012817383,0.023406982,-0.020492554,-0.020599365,-0.040130615,-0.03515625,-0.028839111,-0.013633728,-0.019989014,0.026016235,-0.0022697449,0.01776123,-0.0074272156,-0.03366089,0.0048828125,0.011039734,-0.0068206787,0.023406982,-0.002090454,0.02319336,0.044769287,0.012619019,-0.04019165,0.021438599,0.0052986145,-0.00070667267,-0.011528015,0.046813965,0.037902832,-0.0023860931,-0.008201599,-0.0038261414,-0.0043792725,-0.031341553,-0.008079529,0.0015258789,0.006412506,0.007873535,-0.041046143,0.010269165,0.0021190643,-0.026611328,-0.017456055,0.0053863525,0.02720642,-0.034698486,0.01499176,0.017242432,0.03503418,-0.0211792,-0.0069503784,0.0070381165,0.03326416,0.021148682,-0.005455017,0.00015330315,0.012420654,-0.0059928894,0.016860962,0.0043945312,-0.020095825,0.012809753,0.011734009,0.014228821,0.01474762,0.0016393661,-0.017364502,-0.03036499,0.0019273758,0.01084137,-0.032806396,0.038208008,0.014785767,0.032348633,-0.009773254,0.008377075,0.0074691772,-0.011878967,-0.022979736,0.007980347,0.022384644,-0.0064315796,-0.0041656494,0.0090789795,0.01928711,0.019592285,-0.055236816,-0.005256653,0.011932373,0.021575928,-0.019546509,-0.059814453,-0.021392822,-0.026000977,0.023468018,0.0039901733,0.001824379,0.024719238,-0.0033912659,-0.00932312,0.005428314,0.007686615,-0.013496399,-0.014663696,-0.048675537,-0.017547607,-0.005302429,-0.0061035156,-0.027008057,0.012046814,-0.022384644,-0.033081055,0.0051193237,-0.028182983,-0.00705719,-0.0035991669,0.005252838,0.023742676,-0.013633728,0.013900757,-0.02130127,-0.039031982,-0.00894928,-0.0034713745,0.021957397,-0.039764404,0.012489319,-0.016647339,0.00522995,-0.0073432922,-0.0011072159,0.024887085,0.034973145,0.0048599243,0.026763916,-0.031555176,0.031829834,-0.023452759,0.019210815,-0.007850647,-0.02746582,-0.0121536255,-0.028427124,-0.008636475,0.039215088,-0.017028809,-0.010955811,-0.016571045,-0.059814453,-0.018997192,-0.05783081,0.01474762,0.030838013,0.043701172,-0.02720642,0.007419586,0.008621216,0.0028152466,-0.019454956,0.0009121895,-0.008041382,0.026473999,0.022003174,0.003250122,-0.03463745,-0.033294678,-0.00843811,-0.005847931,-0.050567627,-0.046875,-0.01386261,0.00093507767,-0.006427765,0.008590698,-0.025604248,-0.027160645,-0.0028438568,-0.02557373,0.016723633,0.000043034554,0.015304565,0.015129089,-0.023101807,0.0052757263,0.017669678,-0.02609253,0.025482178,0.02784729,-0.0060653687,-0.04547119,0.0025558472,0.02557373,0.015510559,-0.0079574585,-0.032684326,0.005508423,-0.02507019,-0.06549072,0.008682251,-0.00092983246,0.00010061264,0.006462097,-0.0031032562,-0.04937744,-0.0005297661,-0.028915405,0.0016069412,0.015625,0.004878998,0.016586304,0.011352539,0.0057792664,-0.017333984,-0.007247925,-0.024780273,0.013084412,0.0099105835,0.00078487396,0.022018433,0.041900635,-0.001619339,-0.020263672,0.00040316582,-0.005130768,0.004196167,-0.02104187,-0.0010814667,-0.014343262,0.01689148,0.0043640137,-0.008987427,-0.03375244,0.004425049,0.062194824,0.006088257,-0.0043296814,-0.0018787384,-0.012687683,0.014953613,0.039489746,-0.042419434,-0.002576828,-0.03161621,0.026275635,-0.007095337,0.007881165,-0.004295349,0.031219482,-0.023757935,-0.044158936,-0.0031261444,-0.010574341,-0.009552002,-0.06536865,-0.031143188,-0.06225586,0.025238037,-0.025253296,-0.022537231,0.004688263,0.022155762,-0.027572632,-0.08514404,0.0018978119,0.05078125,0.009117126,0.021362305,-0.0066184998,0.029678345,0.030227661,-0.023651123,-0.0032978058,0.023132324,-0.017028809,-0.007575989,-0.023361206,0.03314209,0.0014543533,-0.017929077,0.019592285,0.012496948,0.013923645,-0.020187378,0.031707764,-0.02204895,0.0036525726,-0.0029296875,0.009735107,-0.014709473,-0.019866943,0.04876709,-0.051635742,0.029022217,0.01309967,0.0048332214,0.01777649,0.025100708,0.033599854,-0.04663086,-0.0071029663,0.026992798,0.022140503,0.04812622,-0.020553589,0.019699097,0.0077285767,0.0010404587,0.0041542053,-0.030075073,-0.019958496,-0.046661377,-0.024169922,0.023513794,0.01058197,-0.012123108,-0.020889282,0.015220642,0.018203735,0.018310547,0.0029563904,-0.019058228,-0.011871338,-0.035736084,0.02166748,0.004360199,0.0032806396,-0.006652832,0.026428223,0.03842163,0.029067993,0.012802124,-0.014862061,-0.009719849,0.02180481,-0.01436615,-0.016403198,0.030441284,0.01676941,0.023590088,0.028198242,0.019851685,-0.036621094,-0.0317688,-0.010505676,-0.016418457,0.016860962,-0.0036239624,0.00258255,0.0146102905,0.0044441223,-0.0028324127,-0.02960205,0.0048179626,-0.0345459,-0.027038574,0.0037593842,-0.020339966,0.023757935,0.012786865,-0.0090789795,0.006450653,-0.0053749084,0.041137695,-0.0031585693,-0.024337769,0.04257202,0.03643799,0.016494751,-0.027542114,0.0033950806,-0.020187378,-0.015563965,0.005622864,-0.018035889,0.011459351,0.038208008,-0.020095825,0.0025577545,0.0050735474,0.025100708,-0.0053253174,0.0118255615,0.0063476562,0.011604309,-0.012649536,0.045318604,-0.053619385,0.02432251,0.011764526,0.00019967556,-0.015296936,-0.006549835,-0.019302368,0.025970459,0.014671326,0.015945435,0.031066895,-0.002216339,0.024932861,-0.031219482,-0.030258179,0.003019333,-0.018188477,-0.01637268,0.004135132,-0.011482239,0.0064926147,0.023117065,-0.01876831,0.015029907,-0.01727295,0.0093688965,0.0012140274,-0.018630981,-0.022659302,-0.026885986,-0.0009870529,-0.023483276,-0.02619934,0.012283325,-0.014595032,0.051483154,0.03375244,0.007411957,0.026428223,0.0129776,0.015266418,-0.036315918,-0.03805542,0.0012550354,-0.015563965,0.034332275,-0.025863647,0.042938232,0.041503906,0.017700195,0.049591064,0.025253296,0.033294678,0.010978699,0.011642456,-0.011833191,0.013771057,-0.033935547,0.017471313,-0.014892578,0.05142212,-0.04168701,0.0021762848,0.00085258484,0.03591919,-0.014862061,0.012290955,0.056152344,0.02319336,-0.011947632,0.043426514,0.0043144226,-0.02835083,-0.023284912,-0.011947632,0.04510498,0.010925293,0.025512695,0.033294678,0.005935669,-0.0032405853,0.0206604,-0.026626587,-0.023742676,0.04977417,0.039794922,-0.008460999,-0.0008368492,-0.009979248,-0.0039367676,-0.04385376,-0.007583618,0.02079773,0.001414299,0.023132324,-0.014511108,0.0034294128,-0.011001587,0.027496338,0.0040779114,0.010871887,-0.016342163,0.029144287,0.027648926,0.0012216568,0.02418518,0.005596161,0.020126343,-0.027435303,-0.023422241,0.017471313,0.034484863,-0.0066566467,0.0009880066,0.032104492,0.015266418,0.04711914,0.016799927,-0.02458191,-0.008338928,0.025817871,0.022491455,-0.0013132095,0.0435791,0.027038574,0.019866943,0.0423584,0.029190063,0.018676758,-0.03543091,0.004558563,-0.0034427643,0.0065193176,0.002040863,-0.0024318695,0.027053833,-0.013694763,0.028839111,0.00006335974,-0.014816284,0.024536133,0.01852417,-0.0013446808,-0.02268982,0.010910034,0.015037537,-0.015838623,0.006839752,0.009155273,-0.012512207,0.018692017,0.017730713,0.040405273,-0.020507812,0.03250122,0.0093688965,-0.025772095,-0.01499939,0.021774292,-0.042419434,0.0063705444,-0.01058197,-0.003917694,-0.04776001,0.018920898,0.035827637,-0.007221222,0.0052757263,0.00089263916,-0.0063552856,0.002368927,0.038269043,0.02268982,-0.00592041,-0.0060691833,-0.023773193,0.018600464,0.042266846,-0.006011963,-0.0126571655,-0.028793335,0.005706787,0.008010864,-0.005580902,-0.0074272156,-0.0027370453,0.0035762787,-0.041015625,0.015419006,0.0317688,0.021774292,0.04699707,-0.019042969,-0.015731812,0.0057640076,0.034179688,0.0065307617,-0.0059318542,-0.013793945,0.031204224,-0.025878906,0.052947998,0.028839111,-0.012245178,0.04458618,-0.0065307617,-0.016647339,-0.007827759,-0.009231567,0.03491211,-0.018814087,0.006134033,-0.007572174,0.01890564,-0.021972656,-0.03137207,-0.0054092407,-0.023727417,-0.0206604,-0.02178955,0.012023926,0.0030975342,0.01600647,0.039489746,0.028274536,-0.020736694,0.05859375,-0.008514404,0.0335083,-0.008705139,0.0074386597,0.06021118,0.014801025,0.039611816,0.025909424,0.012664795,-0.034942627,0.009567261,0.013313293,0.011695862,0.014472961,0.014572144,-0.022857666,0.037963867,-0.019241333,0.036010742,0.0025157928,-0.0050468445,0.01348114,-0.010955811,-0.00090932846,-0.0034427643,-0.008850098,0.01499939,0.044433594,-0.031951904,-0.006893158,-0.017166138,-0.015052795,0.024261475,0.0036525726,0.0064315796,0.006828308,-0.016998291,0.009117126,-0.014877319,-0.01902771,0.015449524,0.02720642,-0.05105591,-0.0008664131,0.015533447,0.030685425,-0.024719238,0.035980225,0.05758667,0.010002136,-0.0020427704,0.04083252,-0.007007599,0.034179688,-0.009292603,0.029953003,0.030136108,-0.0006904602,-0.013114929,0.013908386,0.0032691956,-0.014549255,0.013832092,0.030303955,0.0012617111,-0.005393982,0.009300232,0.010131836,-0.010322571,0.011451721,-0.024337769,0.009727478,-0.02255249,-0.015731812,0.007499695,0.0050582886,0.0024375916,0.0064315796,-0.0036563873,-0.0049705505,0.02003479,0.026809692,0.0149383545,-0.042114258,-0.007221222,0.0056610107,0.016036987,-0.029830933,-0.012329102,0.0025844574,-0.03845215,0.00995636,0.021911621,0.0033550262,0.015838623,-0.023880005,-0.010185242,0.03466797,-0.0025424957,0.03125,0.024215698,-0.006538391,0.014099121,-0.012619019,-0.0075187683,-0.006752014,-0.006801605,0.014343262,0.024993896,-0.014228821,-0.028869629,0.014167786,-0.014381409,0.009735107,0.018753052,-0.006816864,0.036346436,-0.014419556,0.011985779,0.0046653748,0.0049362183,-0.018829346,-0.017333984,-0.0035057068,0.023162842,0.05215454,-0.021087646,-0.015014648,0.017852783,0.030975342,0.0143966675,0.029846191,0.022628784,0.033599854,0.015335083,-0.019073486,-0.022903442,0.019042969,-0.014518738,-0.020950317,0.020324707,-0.028274536,-0.020736694,0.023895264,0.009773254,-0.0027675629,-0.04006958,-0.00029683113,-0.030456543,-0.018447876,0.02684021,-0.0010051727,0.023605347,-0.020507812,-0.0024662018,0.019821167,-0.03074646,-0.023361206,-0.008583069,0.0035037994,-0.022613525,-0.056518555,0.008926392,-0.019241333,0.009605408,-0.028121948,0.0047836304,-0.016036987,0.028808594,0.0035095215,-0.009170532,0.010749817,0.022705078,0.014343262,0.0050086975,0.02444458,-0.023910522,-0.022842407,-0.019973755,0.022506714,-0.019699097,0.03414917,-0.018341064,0.021606445,0.015731812,-0.012199402,0.010429382,-0.0054893494,-0.025238037,-0.000018179417,-0.031402588,-0.03466797,0.017791748,0.026000977,-0.0047454834,-0.00630188,0.04159546,-0.018234253,-0.02267456,0.032958984,0.036071777,0.007926941,0.02268982,0.0059432983,0.0026760101,-0.017410278,0.01449585,-0.021377563,-0.00843811,-0.0012617111,0.0115356445,0.005859375,0.019134521,0.009941101,-0.011276245,-0.0074310303,0.024963379,0.020217896,0.011077881,0.041412354,0.014915466,-0.013122559,-0.020111084,-0.014053345,0.007904053,0.032928467,0.015090942,0.015808105,-0.00198555,0.0112838745,-0.01838684,0.019821167,0.022750854,-0.017318726,-0.04534912,-0.01360321,-0.026611328,0.017303467,-0.005405426,0.007865906,-0.010627747,0.02180481,-0.0010948181,-0.047790527,-0.011421204,0.035339355,0.020462036,-0.005695343,-0.018005371,-0.008926392,0.0077171326,-0.032989502,-0.0041046143,-0.04953003,-0.039489746,-0.01335144,-0.0074310303,0.008285522,-0.00019192696,-0.011375427,-0.0015296936,-0.0022888184,-0.00047683716,0.007659912,0.01499939,-0.026229858,-0.0053482056,0.023208618,0.026611328,-0.018417358,0.013267517,-0.01675415,0.003271103,0.009971619,-0.0022449493,0.026351929,-0.023422241,0.021896362,-0.006954193,-0.0060157776,0.020858765,-0.010368347,0.024658203,-0.0289917,-0.002708435,-0.010696411,0.010314941,0.03262329,-0.018310547,-0.03302002,0.0077552795,-0.016952515,-0.035736084,-0.0033893585,0.0046195984,0.026763916,-0.012496948,0.045196533,-0.015304565,-0.020553589,0.0124053955,0.0048332214,-0.027801514,0.0070648193,0.018234253,-0.0012779236,0.0035381317,-0.007331848,-0.010238647,-0.03353882,-0.008621216,0.00749588,-0.012062073,0.005279541,0.025344849,0.008506775,0.053863525,-0.012207031,0.027313232,0.020751953,0.014251709,0.019332886,0.010787964,0.039031982,-0.0014095306,-0.03439331,-0.0015106201,0.008705139,-0.030029297,0.01914978,-0.007888794,-0.005558014,-0.028335571,0.014381409,-0.0011739731,0.034332275,0.011749268,0.0034008026,-0.025421143,0.0050964355,-0.040283203,-0.006061554,-0.032806396,0.014862061,0.041900635,0.011039734,0.013656616,-0.006252289,-0.022247314,0.033172607,0.042236328,-0.0024909973,-0.04067993,-0.025299072,0.022033691,0.010726929,0.0034236908,0.011795044,-0.034423828,-0.008796692,-0.008987427,-0.009765625,0.003522873,-0.008262634,0.018096924,0.012641907,-0.003955841,-0.006462097,0.030380249,-0.017745972,-0.0039253235,0.006904602,0.0053863525,0.037231445,0.043151855,-0.011230469,0.012489319,0.025527954,-0.04208374,0.045135498,-0.014701843,0.0066566467,-0.0075912476,0.010696411,-0.0446167,-0.015068054,-0.00705719,0.007572174],"createdAt":"2026-04-21T18:32:28.235Z","updatedAt":"2026-04-22T02:32:09.539Z","lastSeenAt":"2026-04-22T02:32:09.539Z","tsv":"'/api':189 '/api/v1/nfts/42':32 '/nfts/42':74 '/pricing':190 '/readme':191 '/request':171 '0.02':10,24,127,170 '000':119 '0x8335':104 '20':118 '2913':105 '300':162 '6':124 'Base network API' 'NFT API' 'NFT metadata' 'USDC micropayment API' 'accept':131 'across':173 'advertis':168 'ai/ml':53 'amount':113 'analyt':52 'api':49,139,205 'appear':62 'application/json':135 'attach':146 'avail':83,212 'base':8,22,99,120 'base-network' 'beyond':84,213 'broader':165 'call':48,116 'caller':144 'challeng':87,159,217 'collect':40 'commit':183 'connect':197 'contract':103 'crawl':186 'data':5,19,51,68 'decim':125 'detail':77,204 'document':78,187,206 'endpoint':6,20,30,130,175 'equal':126 'exact':109 'exampl':211 'finance/web3':55 'gate':3,17 'header':151 'howev':184 'infer':54,69 'infrastructur':57 'json-response' 'key':140 'land':92 'limit':179 'lowpaymentfee' 'lowpaymentfee.com':37,166 'maximum':112 'minim':196 'minimum':182 'network':100 'nft':4,18,66 'nft-data' 'nft-relat':65 'no-api-key' 'page':93,188,199 'part':34 'path':73 'pay':9,23,46 'pay-per-cal':45 'pay-per-call API' 'pay-per-request' 'payment':94,150,156 'per':11,25,47,115 'platform':38,167 'post':132 'price':172 'prior':142 'proof':157 'protocol':44 'provid':219 'rate':178 'registr':143 'relat':67 'request':12,26,133 'request/response':207 'requir':114,137 'resolv':193 'resourc':61 'respons':80 'return':134 'schema':81,208 'scheme':110 'second':163 'serv':64 'settl':96 'simpli':145 'site':90 'span':50 'specif':60 'though':75 'timeout':160 'uniform':169 'unit':121 'url':72 'usag':210 'usd':128 'usdc':14,28,102 'usdc-settlement' 'use':101 'util':58 'valid':154 'via':106 'wallet':198 'x':149 'x-payment':148 'x402':2,16,43,86,108,155,216 'x402 endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"cc6081bd-bb59-42ce-9cf3-4bb768086e38","listingId":"75301220-68cb-42c8-b0b3-a5b6084f098c","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.235Z"}],"sources":[{"listingId":"75301220-68cb-42c8-b0b3-a5b6084f098c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.235Z","lastSeenAt":"2026-04-22T02:32:09.539Z"}],"details":{"listingId":"75301220-68cb-42c8-b0b3-a5b6084f098c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/42 \\\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 x402Version 1, exact scheme, on Base network using USDC at max 20000 base units ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/nfts/42"},{"claim":"The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals.","source_url":"https://lowpaymentfee.com/api/v1/nfts/42"}],"useCases":["Fetching NFT data or metadata on demand with per-call USDC micropayments","Integrating NFT lookups into agent workflows without managing API keys","Programmatic access to NFT information settled on Base L2"],"bestFor":["Agents or bots that need keyless, pay-as-you-go NFT data access","Developers prototyping x402-based payment flows on Base","Low-volume consumers who want no subscription or rate-limit overhead"],"notFor":["High-volume NFT indexing where per-call costs add up quickly","Users who need detailed API documentation or guaranteed SLAs","Anyone requiring non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.062Z"},"updatedAt":"2026-04-22T02:32:09.539Z"}}