{"id":"cab69658-6022-4b95-a785-f83e1a5084c5","shortId":"ejUtYG","kind":"x402","title":"Query NFT ownership data via x402 micropayment on Base for $0.02 per request.","tagline":"Query NFT ownership data via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns NFT ownership information for NFT ID 7. It is part of a broader suite of x402-protocol APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or upfront commitments required.\n\nThe specific endpoint `/api/v1/nfts/7/owner` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers receive a 402 challenge containing payment parameters (payTo address, asset contract, max amount) and must include a valid X-PAYMENT header to authorize the USDC transfer. The USDC asset contract used is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (native USDC on Base). The maximum amount required is 20,000 base units, which equals $0.02 given USDC's 6 decimal places.\n\nNote that the provider's landing page lists many API categories but provides no detailed documentation, request/response schemas, or usage examples for any individual endpoint. The NFT ownership endpoint is not explicitly listed on the homepage, so its exact response format is unknown. Treat this as a lightweight, pay-per-call data lookup with minimal documentation.","tags":[],"capabilities":["nft-ownership-lookup","x402-micropayment","usdc-payment","base-network","pay-per-request","no-api-key","json-response"],"categories":["web3","nft","data"],"synonyms":["NFT owner lookup","NFT ownership API","who owns NFT","token holder query","x402 NFT API","Base USDC micropayment API"],"warnings":["No API documentation or OpenAPI spec available","No request or response schema provided for this endpoint","The /api/v1/nfts/7/owner path is not listed on the provider's homepage — it may be undocumented or experimental","Exact response format is unknown; example_response_json is null"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/7/owner","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/7/owner","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), but there is no documentation, no request/response schema, no examples, and the NFT ownership endpoint is not even listed on the provider's homepage. Effectively a stub with verified liveness.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-21T23:47:05.185Z","embedding":[-0.033569336,-0.01499939,0.0496521,0.012268066,-0.0015048981,-0.037475586,-0.020401001,0.028274536,0.036376953,-0.06677246,0.03488159,-0.004699707,-0.026611328,-0.06878662,-0.043548584,-0.008270264,-0.03930664,-0.018447876,-0.022232056,0.021942139,0.05142212,-0.0044136047,-0.015945435,0.01461792,-0.015914917,0.01386261,-0.029968262,0.0025844574,-0.020965576,-0.030075073,0.023849487,-0.022216797,-0.01096344,0.023773193,-0.030029297,-0.011894226,-0.0025081635,0.0014781952,-0.000028669834,-0.01763916,0.017486572,-0.044891357,0.022109985,0.0015411377,-0.040924072,-0.012779236,-0.006542206,-0.03414917,-0.0028152466,0.023620605,-0.009895325,-0.007167816,-0.026473999,0.017105103,-0.0077209473,0.047302246,0.015777588,-0.011512756,-0.018966675,0.029067993,-0.009437561,-0.06970215,0.018463135,0.020462036,0.025604248,0.030853271,-0.03250122,0.058685303,0.00050878525,0.061706543,0.019470215,0.062072754,-0.007987976,0.016311646,0.008178711,-0.03579712,-0.003572464,0.045318604,-0.037322998,-0.043823242,0.0013332367,-0.02229309,-0.04055786,-0.012145996,-0.0289917,-0.051452637,-0.015144348,0.0013341904,-0.050689697,0.002319336,-0.073791504,0.012817383,-0.008544922,-0.009857178,0.005836487,-0.047851562,-0.009048462,-0.01259613,0.008804321,0.006061554,-0.013725281,-0.012191772,-0.00064754486,0.00869751,0.025161743,0.062072754,-0.0002322197,0.009277344,-0.013420105,0.0046806335,-0.0579834,0.033569336,0.015716553,-0.024276733,-0.0055007935,0.012413025,-0.041778564,0.017349243,-0.013587952,0.025222778,-0.023788452,0.006893158,0.02406311,0.006702423,0.0012388229,-0.032287598,-0.020431519,0.006664276,-0.020019531,-0.0028762817,0.03253174,0.003452301,0.040985107,-0.031311035,-0.05328369,0.0026664734,-0.025146484,-0.043060303,-0.042999268,-0.01826477,0.026565552,-0.017837524,0.00016593933,0.022644043,-0.09967041,0.011001587,-0.014732361,0.003660202,-0.0023784637,0.01977539,0.034454346,-0.0017166138,-0.028671265,-0.0076293945,-0.016357422,-0.049316406,0.012641907,0.0034332275,-0.029968262,0.0368042,-0.0022850037,-0.00075674057,0.004169464,-0.008735657,0.025970459,0.03894043,-0.014923096,-0.07159424,-0.06713867,-0.015205383,-0.020767212,-0.03253174,-0.011390686,-0.00015604496,-0.0289917,-0.05709839,0.009117126,-0.018295288,0.020355225,-0.040802002,-0.009063721,-0.056610107,0.0074386597,-0.013015747,-0.052490234,-0.0058059692,-0.05230713,0.056610107,0.013519287,0.022018433,0.034057617,-0.00030350685,0.024505615,0.052581787,-0.023590088,-0.0134887695,0.02116394,-0.022155762,0.03918457,-0.01550293,0.0035877228,0.0010375977,0.023010254,0.07989502,0.010391235,-0.022979736,0.0055999756,-0.057006836,-0.039398193,-0.023788452,0.00390625,0.014419556,-0.03768921,0.011550903,-0.054107666,-0.035308838,0.024993896,0.010551453,-0.009887695,0.040802002,0.016967773,0.03265381,0.04232788,0.032470703,-0.028701782,0.025100708,0.016357422,-0.00011783838,0.0028324127,-0.037353516,0.0007715225,0.029312134,-0.019088745,0.0028743744,-0.02142334,-0.0000027418137,-0.01725769,0.0028953552,-0.003326416,0.022277832,-0.028869629,-0.042907715,0.002565384,0.023910522,0.00592041,-0.011367798,-0.033233643,-0.05480957,0.038146973,0.030319214,0.037353516,0.0101623535,-0.013847351,-0.01701355,-0.009712219,-0.07873535,0.04864502,0.090148926,-0.0018672943,-0.013793945,0.043426514,-0.011695862,-0.06451416,-0.006801605,-0.020339966,-0.03201294,-0.014976501,0.0019950867,-0.05166626,0.011955261,0.010047913,0.008453369,0.041870117,-0.04550171,-0.033569336,0.011581421,-0.02243042,0.019561768,-0.029388428,-0.035095215,0.0105896,0.024871826,0.03857422,0.0107040405,0.0046539307,-0.0016803741,0.01878357,-0.0033950806,0.0075531006,-0.005672455,-0.023101807,-0.0043525696,-0.0055618286,-0.017715454,0.006210327,-0.004398346,0.07537842,-0.046447754,0.032806396,0.014678955,-0.00021231174,0.0206604,-0.018859863,-0.06512451,0.0017108917,0.014457703,0.038208008,0.061798096,0.02368164,-0.014266968,-0.009483337,0.06088257,-0.05407715,-0.021148682,0.014175415,0.037109375,0.027786255,0.03955078,-0.024841309,-0.03237915,-0.001950264,-0.05078125,0.016586304,-0.030593872,0.0051078796,-0.02720642,0.0008678436,-0.035949707,-0.009773254,-0.01638794,0.02798462,-0.025405884,-0.0015630722,-0.022232056,-0.022521973,0.014411926,0.012802124,-0.011451721,0.022949219,0.02468872,0.027496338,-0.010696411,-0.0368042,-0.05255127,-0.029724121,-0.019454956,-0.0018148422,0.0079422,-0.016906738,0.038146973,-0.041229248,0.0045051575,0.0054092407,0.0026836395,0.01576233,0.010253906,-0.016998291,-0.06945801,-0.068115234,-0.03265381,-0.04611206,0.0065841675,0.02798462,0.008041382,0.02784729,0.007827759,-0.028579712,-0.021606445,0.027740479,-0.06768799,-0.009567261,0.021148682,-0.013046265,-0.019927979,0.0042419434,0.007904053,0.014961243,0.020645142,0.018341064,-0.0023117065,0.07556152,0.036621094,-0.01033783,-0.022781372,0.026275635,0.011764526,0.013771057,-0.014633179,-0.041259766,-0.015419006,0.041107178,-0.029037476,-0.012741089,-0.06262207,0.025360107,0.025009155,0.08337402,0.014518738,0.007671356,0.034301758,0.016845703,0.0034675598,-0.032440186,-0.018112183,-0.056549072,-0.0072288513,0.0044136047,-0.016235352,-0.023010254,-0.02671814,0.04144287,0.005607605,0.006965637,-0.007144928,0.07763672,-0.01914978,0.0096588135,0.017929077,-0.0008740425,0.029403687,0.073791504,-0.041656494,0.029159546,-0.010765076,-0.035736084,0.007858276,0.016448975,-0.019714355,-0.0056495667,-0.058776855,0.010108948,-0.013580322,-0.009742737,-0.049072266,-0.0005264282,-0.00907135,0.047698975,0.04159546,-0.019073486,-0.026733398,0.0022010803,-0.02279663,-0.05734253,-0.012031555,-0.046661377,0.0009384155,0.035614014,-0.028717041,0.022354126,-0.0020885468,0.020751953,0.00283432,0.03857422,0.027160645,-0.002149582,-0.04650879,0.011383057,-0.0058670044,0.01902771,0.018859863,0.0262146,0.032165527,0.049987793,0.046447754,0.01789856,-0.037475586,-0.060791016,0.025909424,-0.020828247,-0.018096924,0.03543091,-0.021865845,-0.0024719238,-0.032318115,-0.012145996,-0.011543274,0.004878998,-0.025360107,-0.022033691,0.031158447,-0.03253174,-0.013183594,-0.054016113,-0.024597168,-0.011108398,0.054992676,0.023712158,0.026031494,-0.036102295,-0.0034770966,0.022079468,-0.006023407,0.035003662,-0.012428284,-0.019256592,-0.009544373,-0.009590149,-0.012634277,-0.009750366,0.022201538,-0.020507812,0.0045166016,0.02947998,0.045440674,0.0060577393,0.0025367737,-0.0076408386,0.026367188,-0.038879395,0.040161133,0.01876831,0.06915283,-0.010513306,-0.0042877197,-0.024887085,0.030532837,-0.0020503998,0.031082153,-0.046142578,-0.007167816,-0.0053520203,0.028656006,0.014793396,-0.045318604,0.020126343,-0.003194809,-0.045898438,-0.059814453,0.04107666,-0.0017080307,0.040222168,0.02154541,0.004650116,0.029190063,-0.011817932,-0.004119873,0.035095215,-0.021713257,-0.013168335,-0.006210327,-0.02078247,-0.017044067,-0.015640259,-0.028030396,0.028915405,0.00022745132,0.011604309,0.010871887,-0.027908325,0.011985779,0.010391235,-0.0048675537,0.014335632,0.016555786,0.020614624,0.06964111,0.022750854,-0.04647827,0.038726807,0.012634277,-0.0024795532,0.009254456,0.049316406,0.037353516,0.015548706,0.005695343,-0.003452301,-0.013023376,-0.010421753,-0.0036525726,0.007835388,0.0071792603,0.0099487305,-0.028152466,0.021087646,0.011192322,-0.028213501,-0.009460449,0.028030396,0.012168884,-0.036224365,-0.0023460388,0.026153564,0.053710938,-0.018615723,0.0074691772,-0.006225586,0.0423584,0.033081055,-0.007801056,-0.005722046,-0.00079250336,-0.014961243,0.01977539,0.029220581,-0.031311035,0.012550354,0.011444092,0.021011353,0.015686035,0.016143799,-0.021331787,-0.022323608,0.01802063,-0.005748749,-0.03466797,0.036315918,0.0078125,0.035095215,0.012458801,0.017715454,0.009292603,-0.01928711,-0.009887695,0.012672424,0.03793335,-0.0043678284,-0.006916046,0.004814148,0.010055542,0.024642944,-0.049041748,0.024093628,0.018051147,0.0059432983,-0.025650024,-0.059326172,-0.024139404,-0.029968262,0.011993408,-0.0070877075,0.0064468384,0.017562866,-0.009384155,-0.02041626,0.01071167,0.011795044,0.00039744377,-0.0024471283,-0.03781128,-0.006008148,-0.0055351257,0.0024032593,0.015975952,0.00308609,-0.047973633,-0.0262146,-0.013893127,-0.042999268,-0.020812988,-0.027374268,-0.018096924,0.02796936,-0.035369873,0.019256592,-0.029510498,-0.036315918,0.0016460419,0.0020637512,0.040863037,-0.03744507,0.018432617,0.0069122314,0.0060653687,0.005344391,-0.0045166016,0.0040245056,0.028839111,0.0003156662,0.042175293,-0.043701172,0.0236969,-0.019622803,0.03286743,-0.00037956238,-0.029785156,0.0056991577,-0.016677856,-0.007007599,0.043792725,0.00026106834,-0.022125244,-0.0018672943,-0.03201294,0.009780884,-0.041870117,0.013343811,-0.0070266724,0.029281616,-0.027008057,0.0035476685,0.003643036,0.02456665,-0.01626587,0.008903503,-0.014678955,0.029830933,0.014923096,0.031341553,-0.02494812,-0.02003479,0.012466431,0.008979797,-0.047729492,-0.020141602,-0.009002686,-0.020217896,0.010986328,0.00054979324,-0.044067383,-0.030395508,0.016815186,-0.026763916,0.021881104,-0.01739502,0.004535675,0.0066947937,-0.0066184998,0.010879517,0.015716553,0.014419556,0.018341064,0.030807495,0.003068924,-0.018463135,-0.008018494,0.0262146,0.028869629,0.014205933,-0.008300781,-0.044189453,-0.02935791,-0.05029297,-0.013893127,-0.018188477,0.027542114,0.0020160675,0.012878418,-0.06463623,0.003753662,-0.039367676,-0.007297516,0.019134521,-0.01361084,0.023452759,-0.0110321045,0.02104187,-0.0155181885,-0.016921997,-0.027252197,0.0053634644,0.00869751,-0.0053520203,0.018035889,0.027420044,-0.004169464,-0.014328003,-0.010627747,0.0076789856,0.018218994,-0.012001038,-0.00907135,-0.0046653748,0.004146576,0.004886627,0.013282776,-0.02444458,0.004257202,0.049804688,-0.017532349,-0.008338928,-0.00009953976,-0.015777588,0.013664246,0.03149414,-0.045837402,0.0018949509,-0.017181396,0.033172607,-0.025161743,0.0093307495,-0.0024261475,0.043792725,-0.02758789,-0.048675537,0.0143585205,0.0079574585,-0.014389038,-0.054351807,-0.020965576,-0.07086182,0.016433716,-0.007217407,-0.032470703,-0.0077323914,0.012619019,-0.023132324,-0.076049805,-0.011253357,0.045318604,0.01751709,0.013076782,0.0070762634,0.024276733,0.0069847107,-0.019165039,-0.008972168,0.005622864,-0.041412354,-0.004055023,-0.04144287,0.047912598,0.0126953125,-0.016281128,0.021850586,0.00932312,0.033325195,-0.0107040405,0.028945923,-0.026153564,-0.0104599,-0.005508423,0.016677856,-0.023834229,0.00806427,0.04119873,-0.056915283,0.022033691,0.017227173,0.022644043,0.016555786,0.016281128,0.02684021,-0.04006958,-0.012901306,0.018112183,-0.0048713684,0.044036865,-0.025436401,-0.009864807,-0.005584717,-0.0035991669,-0.012298584,-0.03515625,-0.020126343,-0.026977539,-0.023345947,0.041503906,0.005290985,-0.0067749023,0.00019586086,0.02218628,-0.001086235,-0.00032901764,0.0036373138,-0.03314209,-0.021881104,-0.044830322,-0.0036334991,0.029922485,-0.0034275055,-0.013442993,0.030975342,0.030349731,0.025680542,0.0082473755,-0.01751709,-0.014228821,0.031555176,-0.0050697327,-0.011016846,0.035461426,-0.014671326,0.026535034,0.005428314,0.020980835,-0.04876709,-0.0413208,-0.006389618,0.0024261475,0.022964478,-0.013664246,0.008148193,0.019638062,0.016220093,-0.017822266,-0.033935547,0.011184692,-0.017181396,-0.038482666,-0.010017395,-0.024475098,0.02507019,0.00068473816,-0.022338867,0.012893677,-0.0005850792,0.04006958,0.0022563934,0.0053863525,0.03552246,0.024154663,0.0071640015,-0.029632568,0.0043945312,-0.02507019,-0.02583313,-0.002796173,-0.012489319,0.009353638,0.019500732,0.0045700073,0.000042438507,0.011894226,0.033447266,0.0121154785,0.013084412,0.017974854,0.035308838,-0.014633179,0.022583008,-0.02583313,0.013061523,0.020584106,0.0029315948,-0.01360321,0.009475708,-0.012008667,0.05331421,0.014694214,-0.02267456,0.023239136,-0.011268616,0.04449463,-0.022247314,-0.019378662,-0.011123657,-0.010246277,-0.010375977,0.017028809,0.020339966,0.005306244,0.046325684,-0.034423828,0.021911621,-0.0063171387,0.010925293,0.0095825195,-0.0118637085,-0.021896362,-0.008720398,0.00083494186,-0.02607727,-0.029067993,-0.007762909,-0.010040283,0.06738281,0.005428314,-0.0016422272,0.0259552,0.012138367,0.02015686,-0.035186768,-0.029067993,0.007205963,-0.025878906,0.015586853,-0.03253174,0.03778076,0.047973633,0.022872925,0.04937744,-0.005218506,0.046569824,0.016189575,-0.0043678284,-0.021713257,0.0035629272,-0.024169922,0.015487671,-0.024597168,0.04827881,-0.02671814,-0.00020098686,-0.0076179504,0.033935547,-0.017288208,0.023849487,0.05596924,0.043273926,-0.012298584,0.039489746,0.0072364807,-0.031341553,-0.0143966675,-0.015304565,0.045288086,0.02482605,0.020690918,0.046569824,0.012458801,0.004776001,0.010894775,-0.012779236,-0.021911621,0.0289917,0.043395996,-0.020248413,-0.01663208,-0.00057935715,-0.017791748,-0.04043579,-0.024246216,0.015579224,-0.004245758,0.020950317,0.0006451607,0.001821518,-0.015975952,0.021530151,0.022644043,-0.0064201355,-0.013664246,0.02017212,-0.0027866364,-0.016647339,0.015304565,-0.0071144104,0.012878418,-0.015037537,-0.01109314,0.022399902,0.03466797,-0.0019550323,-0.021560669,0.002614975,0.0014533997,0.0184021,0.022155762,-0.028427124,0.0057640076,0.0060195923,0.008163452,0.014923096,0.04232788,0.020401001,0.02079773,0.038879395,0.026397705,0.022079468,-0.02923584,-0.005756378,0.014053345,0.020263672,0.0056419373,0.0021896362,0.021347046,-0.012428284,0.032562256,0.015281677,-0.0064201355,0.025360107,0.010826111,-0.0102005005,-0.0055503845,0.012611389,0.01777649,-0.024383545,-0.006713867,-0.0013942719,-0.01512146,0.01612854,0.021102905,0.025802612,-0.016525269,0.064453125,0.025970459,-0.032989502,-0.006149292,0.014091492,-0.025970459,-0.0071983337,-0.015701294,-0.002696991,-0.041137695,0.035064697,0.0032806396,0.009757996,0.025100708,-0.0063972473,-0.023498535,0.0115737915,0.020492554,0.027938843,-0.007835388,-0.0052261353,-0.041412354,0.030899048,0.03451538,-0.0036697388,0.003025055,-0.016967773,-0.012054443,0.014297485,0.0048065186,0.0067749023,-0.0056495667,-0.017410278,-0.054840088,0.014793396,0.024093628,0.006462097,0.041412354,-0.013198853,-0.023529053,-0.0005555153,0.015014648,0.013549805,-0.0025596619,-0.010353088,0.02268982,-0.025222778,0.025924683,0.04989624,-0.0044441223,0.022232056,0.008201599,-0.025558472,-0.010826111,-0.009544373,0.02355957,-0.034942627,-0.021347046,-0.0010433197,0.0025749207,-0.0010566711,-0.026153564,-0.0026359558,-0.011077881,-0.006752014,-0.02558899,0.019882202,0.012268066,0.021713257,0.01889038,0.024551392,-0.015609741,0.058380127,-0.010185242,0.03353882,-0.017974854,0.00029921532,0.047943115,0.015541077,0.056915283,0.009307861,-0.00007748604,-0.022033691,0.005256653,0.006591797,0.007499695,0.026657104,0.0105896,-0.017837524,0.042785645,-0.010139465,0.047180176,0.010360718,-0.006038666,0.0031490326,-0.009124756,-0.0032234192,-0.0009675026,-0.015808105,0.021987915,0.03540039,-0.025436401,-0.0019569397,-0.014266968,-0.020126343,0.016799927,-0.0045166016,-0.00035572052,-0.0011663437,-0.010177612,0.006427765,-0.01158905,0.0024433136,-0.0054130554,0.03805542,-0.04574585,-0.01651001,0.018188477,0.018188477,-0.022994995,0.035064697,0.051757812,0.0019702911,0.008666992,0.029510498,-0.017349243,0.03781128,-0.0017004013,0.023498535,0.034057617,0.0077323914,0.0127334595,0.03640747,0.010116577,-0.026977539,0.002149582,0.023025513,-0.0037498474,-0.0011768341,0.028152466,0.02027893,-0.009208679,0.0012550354,-0.012741089,0.011520386,-0.022216797,-0.00081157684,0.009239197,0.018722534,0.011405945,0.014289856,-0.007522583,0.0055236816,0.03164673,0.040527344,0.03704834,-0.030151367,-0.011619568,0.008766174,0.01285553,-0.009986877,-0.0057792664,-0.009407043,-0.025161743,-0.020584106,0.017227173,-0.01083374,0.016479492,-0.03717041,-0.029724121,0.05456543,0.01763916,0.018844604,0.022460938,-0.01499939,0.034576416,0.011398315,-0.00818634,0.0042686462,-0.0087509155,0.033935547,0.024337769,-0.010856628,-0.016799927,0.019958496,-0.0079193115,-0.0013570786,0.02418518,-0.005519867,0.018341064,-0.016021729,0.009796143,0.005744934,0.0017967224,-0.016586304,-0.021759033,0.0034122467,0.008544922,0.031982422,-0.010444641,-0.006187439,0.030639648,0.030319214,0.011558533,0.050872803,-0.0029411316,0.034362793,0.0073051453,-0.016433716,-0.010353088,0.013931274,-0.010986328,-0.035339355,0.0040016174,-0.049102783,-0.039611816,0.03982544,0.0048942566,-0.0058021545,-0.042175293,0.0050697327,-0.008857727,-0.017974854,0.011222839,0.019622803,0.0047302246,-0.0016527176,-0.00043988228,0.025146484,-0.03274536,-0.035308838,0.00030231476,-0.0019607544,-0.030273438,-0.050811768,0.005191803,0.010429382,0.0005636215,-0.025283813,-0.0042877197,-0.011367798,0.023529053,-0.013648987,-0.012901306,-0.0058288574,0.026367188,0.013015747,0.005004883,0.013046265,-0.01965332,-0.031433105,-0.026031494,0.035186768,-0.010543823,0.022903442,-0.008888245,0.02519226,0.012550354,-0.00012981892,0.0030593872,-0.0064926147,-0.00079393387,-0.00086832047,-0.030838013,-0.018035889,0.02796936,0.028900146,0.008468628,-0.008087158,0.034576416,-0.023391724,-0.009735107,0.03466797,0.033050537,0.0047798157,0.0017004013,0.012451172,-0.0011234283,-0.021621704,0.014701843,-0.031158447,0.00079250336,-0.02015686,0.016662598,0.0065612793,0.029342651,0.015716553,-0.0055274963,-0.015808105,0.017349243,0.034851074,0.023101807,0.02128601,0.026123047,-0.02268982,-0.01725769,-0.028381348,0.008872986,0.01928711,0.01675415,0.022872925,-0.01626587,-0.002199173,-0.012329102,0.034942627,0.019515991,-0.006149292,-0.028900146,-0.0178833,-0.050964355,0.034179688,0.001958847,0.026885986,-0.011550903,0.02722168,0.011390686,-0.047821045,-0.016708374,0.059814453,0.0030288696,-0.008049011,-0.032714844,0.008956909,0.012199402,-0.042816162,0.0050849915,-0.036590576,-0.030273438,-0.005630493,-0.0057868958,0.019851685,0.009353638,-0.009391785,-0.0043754578,-0.0024261475,0.020217896,0.023345947,0.015945435,-0.023712158,-0.012878418,0.0074691772,0.020339966,-0.00067567825,-0.012298584,0.008117676,-0.008018494,0.018249512,-0.026855469,0.029876709,-0.02267456,0.014762878,0.015716553,-0.0075302124,0.015403748,0.006801605,0.020050049,-0.0116119385,0.0043754578,-0.0021247864,0.019332886,0.048583984,-0.022888184,-0.039489746,0.0031909943,-0.008392334,-0.020721436,-0.011314392,-0.016098022,0.011909485,-0.042266846,0.011436462,-0.013389587,-0.010307312,0.008705139,-0.0035381317,-0.026123047,-0.008331299,0.023605347,0.01739502,0.0076789856,-0.016967773,-0.0038719177,-0.036193848,-0.034179688,-0.007320404,-0.006072998,-0.005317688,0.012496948,-0.0014104843,0.0473938,-0.011116028,0.022476196,0.019714355,0.02758789,0.043060303,0.023468018,0.042144775,0.008926392,-0.02571106,0.01461792,-0.0023937225,-0.038726807,0.019348145,-0.026290894,-0.017227173,-0.02909851,0.0005469322,-0.0043525696,0.015823364,0.027694702,0.003944397,-0.011695862,0.012550354,-0.024414062,-0.010292053,-0.015266418,0.00207901,0.04031372,0.012901306,-0.0018796921,-0.0070648193,-0.0093307495,0.047454834,0.059906006,-0.013420105,-0.014892578,-0.009048462,0.040618896,-0.0140686035,0.0021419525,-0.0010118484,-0.016189575,-0.008735657,-0.01600647,-0.00945282,0.010795593,-0.026611328,-0.0011091232,0.005455017,-0.015419006,-0.017593384,0.028305054,-0.010017395,-0.003993988,0.008674622,-0.0102005005,0.014228821,0.028274536,-0.004837036,0.009490967,0.016281128,-0.043395996,0.047210693,0.011604309,-0.0022602081,0.010574341,-0.005180359,-0.029586792,-0.026000977,0.003709793,-0.008842468],"createdAt":"2026-04-21T18:32:28.719Z","updatedAt":"2026-04-22T04:02:42.702Z","lastSeenAt":"2026-04-22T04:02:42.702Z","tsv":"'/api/v1/nfts/7/owner':99 '0.02':11,24,76,163 '000':158 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':147 '20':157 '402':116 '6':167 '7':38 'Base USDC micropayment API' 'NFT owner lookup' 'NFT ownership API' 'accept':100 'address':122 'ai/ml':59 'amount':126,154 'analyt':58 'api':50,88,179 'asset':123,143 'author':137 'base':9,22,84,151,159 'base-network' 'broader':44 'call':221 'caller':113 'categori':180 'challeng':117 'commit':94 'contain':118 'contract':124,144 'data':4,17,57,222 'decim':168 'detail':184 'document':185,226 'endpoint':28,66,98,194,198 'equal':162 'exact':208 'exampl':190 'explicit':201 'finance/web3':61 'format':210 'given':164 'handl':108 'header':135 'homepag':205 'id':37 'includ':129 'individu':193 'infer':60 'inform':34 'infrastructur':63 'json':105 'json-response' 'key':89 'land':175 'lightweight':217 'limit':91 'list':177,202 'lookup':223 'lowpaymentfee.com':30 'mani':178 'max':125 'maximum':153 'micropay':7,20 'minim':225 'model':74 'must':128 'nativ':148 'network':85 'nft':2,15,32,36,196 'nft-ownership-lookup' 'no-api-key' 'note':170 'offer':51 'ownership':3,16,33,197 'page':176 'paramet':120 'part':41 'pay':219 'pay-per-cal':218 'pay-per-request' 'payment':106,119,134 'payto':121 'per':12,25,77,220 'place':169 'platform':69 'post':101 'price':73 'protocol':49,112 'provid':55,173,182 'queri':1,14 'rate':90 'receiv':114 'request':13,26,78,102 'request/response':186 'requir':95,155 'respons':209 'return':31,104 'schema':187 'settl':79 'share':70 'span':56 'specif':97 'suit':45 'token holder query' 'transfer':140 'treat':213 'uniform':72 'unit':160 'unknown':212 'upfront':93 'usag':189 'usdc':81,139,142,149,165 'usdc-payment' 'use':145 'util':64 'valid':131 'via':5,18,109 'who owns NFT' 'x':133 'x-payment':132 'x402':6,19,48,111 'x402 NFT API' 'x402-micropayment' 'x402-protocol':47","prices":[{"id":"d16c10b5-f4a9-49d0-be38-d42873d07d6a","listingId":"cab69658-6022-4b95-a785-f83e1a5084c5","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/7/owner","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.719Z"}],"sources":[{"listingId":"cab69658-6022-4b95-a785-f83e1a5084c5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/7/owner","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.719Z","lastSeenAt":"2026-04-22T04:02:42.702Z"}],"details":{"listingId":"cab69658-6022-4b95-a785-f83e1a5084c5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/7/owner \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/7/owner"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/7/owner"},{"claim":"All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"maxAmountRequired is 20000 base units (= $0.02 USDC with 6 decimals)","source_url":"https://lowpaymentfee.com/api/v1/nfts/7/owner"}],"useCases":["Querying the current owner of a specific NFT programmatically","Building dashboards that display NFT ownership information","Agent-driven workflows that need on-chain NFT ownership data without managing API keys"],"bestFor":["Developers needing simple, keyless NFT ownership queries","AI agents that can settle x402 micropayments on Base","Low-volume, pay-as-you-go NFT data lookups"],"notFor":["Bulk NFT collection scanning (single-NFT endpoint, no batch support evident)","Users who cannot settle USDC payments on the Base network","Applications requiring detailed NFT metadata beyond ownership"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.301Z"},"updatedAt":"2026-04-22T04:02:42.702Z"}}