{"id":"a9fe6903-128e-4602-95d2-54310c45908b","shortId":"SkK3y9","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 #33. 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.\n\nThe specific endpoint `/api/v1/nfts/33/owner` accepts POST requests and is gated by the x402 payment protocol. When called without payment, it returns a 402 challenge specifying the USDC asset contract (0x8335…2913 on Base) and a maxAmountRequired of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). There are no API keys, rate limits, or subscription commitments — each call is paid individually via the X-PAYMENT header.\n\nDocumentation is minimal. The provider's landing page lists available API categories and confirms the $0.02/request pricing, but there is no OpenAPI spec, no detailed request/response schema, and no usage examples beyond the endpoint URLs. The NFT-specific endpoint is not explicitly listed on the homepage, so its exact response format is inferred from the description field (\"Premium API Access\") and the mimeType (application/json). Treat the response structure as uncertain until verified with an actual paid call.","tags":[],"capabilities":["nft-ownership-query","x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key"],"categories":["web3","nft"],"synonyms":["NFT owner lookup","NFT ownership API","token holder query","x402 NFT endpoint","Base USDC micropayment API","pay-per-call NFT data"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/nfts/33/owner path is not listed on the provider's homepage — it may be undocumented or experimental","Response format is entirely unknown; the only confirmed mimeType is application/json","No robots.txt or agents.txt present on the origin"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/33/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/33/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 and returns a valid x402 402 challenge, confirming pricing and network. However, there is no OpenAPI spec, no documented request/response schema, no examples, and the specific NFT endpoint isn't even listed on the provider's homepage. The actual data returned is unknown without a paid call.","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":"2026-04-21T23:35:01.796Z","embedding":[-0.01927185,-0.01222229,0.053741455,0.0043296814,0.0057411194,-0.042297363,-0.016906738,0.02331543,0.035003662,-0.06323242,0.038909912,-0.0015630722,-0.03363037,-0.056640625,-0.048461914,-0.0041007996,-0.04598999,-0.025161743,-0.028411865,0.02671814,0.056884766,-0.0017709732,-0.019943237,0.010101318,-0.020355225,0.0065689087,-0.01914978,-0.0067634583,-0.02458191,-0.029541016,0.02166748,-0.023971558,-0.004585266,0.024520874,-0.023666382,-0.0063209534,-0.0076522827,0.0074539185,0.010787964,-0.024734497,0.011314392,-0.04647827,0.021911621,0.0059890747,-0.040283203,-0.007965088,-0.014122009,-0.02998352,-0.0041923523,0.012901306,-0.024276733,-0.011985779,-0.020812988,0.010253906,0.0034866333,0.04486084,-0.0019426346,-0.01876831,-0.018829346,0.016311646,-0.014801025,-0.07989502,0.02746582,0.010643005,0.033721924,0.039520264,-0.021591187,0.06286621,0.008346558,0.0647583,0.025650024,0.06866455,-0.0006160736,0.01637268,0.012123108,-0.02142334,-0.015213013,0.054260254,-0.03375244,-0.034973145,-0.0096206665,-0.019897461,-0.03591919,-0.01058197,-0.015563965,-0.052459717,-0.013473511,-0.0030574799,-0.056518555,0.0023403168,-0.080566406,0.008796692,-0.009735107,-0.01449585,0.004459381,-0.04083252,-0.01361084,-0.00058984756,-0.00440979,0.011039734,-0.012794495,-0.018203735,0.0074768066,0.017608643,0.037750244,0.06781006,0.004283905,0.011245728,-0.006275177,-0.0031986237,-0.04763794,0.031463623,0.011619568,-0.029067993,-0.0039978027,0.0050239563,-0.031799316,0.014282227,-0.020828247,0.029159546,-0.028793335,0.0023822784,0.030700684,-0.0060195923,0.0041999817,-0.041259766,-0.016998291,0.009269714,-0.020965576,-0.0029449463,0.039215088,0.014602661,0.04901123,-0.039733887,-0.05331421,-0.000685215,-0.021347046,-0.03829956,-0.033172607,-0.0231781,0.032928467,-0.031799316,-0.0005207062,0.0236969,-0.09106445,0.012672424,-0.011016846,0.004924774,-0.0013685226,0.021560669,0.027862549,0.0054512024,-0.027374268,-0.0064811707,-0.016601562,-0.03604126,0.010185242,0.006210327,-0.019348145,0.03564453,0.0007953644,-0.0003976822,0.0126953125,-0.018737793,0.032684326,0.047302246,-0.001572609,-0.07336426,-0.06951904,-0.023040771,-0.010719299,-0.033203125,-0.0067481995,-0.010643005,-0.02772522,-0.052001953,-0.001332283,-0.019470215,0.023254395,-0.03829956,-0.014816284,-0.052703857,0.007987976,-0.019012451,-0.04876709,-0.0072021484,-0.051605225,0.057861328,0.009010315,0.016921997,0.031280518,0.008682251,0.018173218,0.04949951,-0.02142334,-0.017440796,0.028961182,-0.022766113,0.03894043,-0.0026454926,0.009002686,-0.0052833557,0.027496338,0.07269287,0.0234375,-0.027145386,0.022903442,-0.064575195,-0.045318604,-0.010353088,0.009262085,0.010597229,-0.03010559,0.0065574646,-0.042144775,-0.023452759,0.011619568,0.009407043,-0.016098022,0.041381836,0.01687622,0.018096924,0.024108887,0.02658081,-0.03253174,0.03277588,0.015640259,0.0022296906,0.003206253,-0.043395996,-0.011451721,0.024414062,-0.031097412,0.0055618286,-0.025634766,0.008758545,-0.009933472,0.011222839,-0.00022029877,0.0115737915,-0.023483276,-0.040985107,-0.002073288,0.036590576,-0.0018129349,-0.022506714,-0.033935547,-0.058135986,0.03225708,0.032073975,0.037475586,0.009727478,-0.011787415,-0.015052795,-0.015655518,-0.08648682,0.03805542,0.08660889,-0.005886078,-0.024856567,0.04244995,-0.009223938,-0.06201172,-0.008201599,-0.010673523,-0.020080566,-0.016906738,0.0067634583,-0.04925537,0.013786316,0.016937256,0.0062446594,0.04724121,-0.04257202,-0.026397705,0.0038471222,-0.027389526,0.010612488,-0.02494812,-0.03463745,0.010597229,0.030029297,0.040649414,0.0008678436,0.004852295,-0.0069847107,0.027420044,0.000074863434,0.0028839111,-0.005279541,-0.028015137,0.0027866364,-0.0034313202,-0.020339966,0.0024814606,-0.011146545,0.07366943,-0.050445557,0.029785156,0.00819397,0.007835388,0.04031372,-0.006855011,-0.05505371,-0.0040245056,0.013687134,0.032989502,0.060424805,0.007209778,-0.015235901,-0.011016846,0.061767578,-0.05508423,-0.016448975,0.019012451,0.038635254,0.025268555,0.040863037,-0.025604248,-0.026519775,-0.002714157,-0.047424316,0.019622803,-0.01576233,0.006198883,-0.030456543,0.015312195,-0.032196045,-0.008361816,-0.015792847,0.01612854,-0.0345459,-0.003446579,-0.018676758,-0.013832092,0.016189575,0.023773193,-0.0062217712,0.024047852,0.03137207,0.025985718,-0.005958557,-0.04360962,-0.042053223,-0.023544312,-0.005935669,-0.014099121,0.016311646,-0.01689148,0.040496826,-0.04019165,-0.00039482117,0.013687134,0.008522034,0.026901245,0.011161804,-0.004673004,-0.06384277,-0.062805176,-0.034576416,-0.053649902,0.004535675,0.024902344,0.014305115,0.03466797,0.008178711,-0.026504517,-0.0211792,0.028396606,-0.06829834,-0.010978699,0.024963379,-0.019195557,-0.020401001,0.00065279007,0.01638794,0.01133728,0.025268555,0.013214111,-0.01777649,0.07598877,0.035736084,-0.0057678223,-0.0058135986,0.015731812,0.021209717,0.00422287,-0.01651001,-0.04727173,-0.006126404,0.035827637,-0.032409668,-0.02470398,-0.059661865,0.03262329,0.02217102,0.070495605,0.017486572,0.016647339,0.049072266,0.011543274,0.00945282,-0.03186035,-0.0116119385,-0.054901123,-0.004219055,0.016662598,-0.015838623,-0.021270752,-0.035217285,0.034210205,0.0043525696,0.010559082,-0.011886597,0.06518555,-0.020614624,0.0030403137,0.014701843,0.01574707,0.047210693,0.078308105,-0.03994751,0.031097412,-0.0095825195,-0.029830933,0.0033912659,0.022094727,-0.008346558,-0.0078048706,-0.07495117,-0.014457703,-0.01386261,-0.023666382,-0.045715332,-0.0026855469,0.001871109,0.038208008,0.033050537,-0.013298035,-0.0317688,0.0020561218,-0.02911377,-0.0637207,-0.0060424805,-0.04901123,0.0072669983,0.026672363,-0.023635864,0.013687134,-0.011665344,0.0074653625,0.0077819824,0.048583984,0.020004272,-0.0008196831,-0.04827881,0.017730713,-0.0020694733,0.012893677,0.02545166,0.024841309,0.030456543,0.041778564,0.043640137,0.017974854,-0.033355713,-0.07110596,0.029754639,-0.020812988,-0.01663208,0.020828247,-0.017623901,0.010406494,-0.024047852,-0.004234314,-0.021499634,0.008079529,-0.033935547,-0.019699097,0.024536133,-0.030273438,-0.0065193176,-0.04837036,-0.023269653,-0.01914978,0.055389404,0.028137207,0.0060539246,-0.046936035,-0.004673004,0.02456665,0.0011348724,0.01663208,-0.012924194,-0.027694702,-0.0038928986,-0.015792847,-0.013771057,-0.019546509,0.02204895,-0.027267456,0.005580902,0.039093018,0.04675293,0.0067329407,-0.0059776306,-0.011276245,0.02381897,-0.040008545,0.033355713,0.011550903,0.061767578,-0.007675171,-0.0039596558,-0.027770996,0.03515625,0.00096416473,0.044036865,-0.05117798,-0.013298035,-0.0029201508,0.028640747,0.009056091,-0.041259766,0.013725281,0.00040125847,-0.043121338,-0.047302246,0.04208374,-0.015541077,0.03604126,0.014030457,0.006389618,0.02796936,-0.019348145,-0.002632141,0.03753662,-0.02305603,-0.024032593,-0.010917664,-0.029953003,-0.014381409,-0.0016422272,-0.030014038,0.029083252,-0.0020771027,0.006298065,0.0074539185,-0.028533936,0.023757935,0.012207031,0.0059776306,0.021133423,0.012527466,0.018875122,0.06210327,0.017349243,-0.037628174,0.03427124,0.016693115,-0.0037078857,-0.00015747547,0.03829956,0.030548096,0.021636963,0.005874634,-0.005859375,-0.011688232,-0.021362305,-0.003921509,0.022064209,0.011062622,0.012359619,-0.029159546,0.011260986,0.011886597,-0.024368286,-0.014877319,0.018951416,0.015403748,-0.030273438,-0.0014019012,0.021713257,0.060302734,-0.021697998,0.0071411133,-0.011024475,0.037231445,0.032165527,0.0004746914,-0.009674072,0.0016736984,-0.020614624,0.015274048,0.017730713,-0.03665161,0.02772522,0.0057258606,0.01914978,0.02330017,0.014007568,-0.014907837,-0.02935791,0.020751953,0.001452446,-0.021270752,0.03253174,0.0031051636,0.024429321,0.007873535,0.015213013,0.008529663,-0.021759033,-0.008979797,0.0059928894,0.029388428,0.0011501312,-0.008506775,0.0000808239,0.0027370453,0.017562866,-0.05041504,0.0076065063,0.025115967,0.0054244995,-0.03164673,-0.055786133,-0.030334473,-0.02734375,0.020690918,0.0010681152,0.012863159,0.016662598,-0.010055542,-0.016937256,0.015151978,0.014579773,-0.00086927414,-0.0066375732,-0.037017822,-0.011039734,-0.009597778,-0.0043907166,0.013771057,-0.0029468536,-0.055389404,-0.037750244,-0.020217896,-0.03982544,-0.026855469,-0.021591187,-0.009513855,0.019317627,-0.028671265,0.016952515,-0.027496338,-0.032836914,-0.0056610107,-0.000026106834,0.034484863,-0.045532227,0.021316528,-0.0062294006,0.020629883,-0.010528564,-0.0039711,0.010307312,0.02168274,0.0045776367,0.03189087,-0.03543091,0.025253296,-0.01927185,0.031677246,-0.002450943,-0.025604248,0.015991211,-0.023834229,-0.011978149,0.04333496,-0.004852295,-0.017349243,-0.010429382,-0.030212402,-0.0023860931,-0.04800415,0.016662598,-0.0045547485,0.027740479,-0.031707764,0.013130188,0.007865906,0.021987915,-0.025390625,-0.0013027191,-0.006904602,0.027267456,0.008995056,0.023468018,-0.012779236,-0.025039673,0.01083374,0.0041542053,-0.05609131,-0.021270752,-0.017593384,-0.011230469,0.01751709,0.0006136894,-0.03466797,-0.0317688,0.017089844,-0.026824951,0.019134521,-0.019332886,0.0046539307,0.011062622,-0.008399963,0.010978699,0.02017212,0.005558014,0.01789856,0.03225708,-0.0009937286,-0.021514893,-0.00014960766,0.039611816,0.03289795,0.015388489,-0.012672424,-0.041137695,-0.020324707,-0.05206299,-0.006526947,-0.012962341,0.030456543,0.0073280334,0.017700195,-0.059661865,0.0012426376,-0.03656006,-0.009117126,0.019317627,-0.0119018555,0.021408081,-0.0071029663,0.013015747,-0.016220093,-0.013137817,-0.028213501,0.0070724487,0.009056091,-0.003967285,0.022155762,0.023651123,-0.0001835823,-0.020370483,-0.012359619,0.0033187866,0.020370483,-0.016174316,-0.011238098,-0.012382507,0.0056114197,0.0006766319,0.01574707,-0.020889282,0.004600525,0.056884766,-0.008232117,-0.0004813671,-0.0031490326,-0.0074691772,0.015090942,0.033233643,-0.047851562,0.008468628,-0.03060913,0.029434204,-0.027130127,0.013038635,0.00033473969,0.043395996,-0.043273926,-0.062042236,0.006340027,0.004142761,-0.008422852,-0.061767578,-0.023132324,-0.07269287,0.0068130493,-0.01436615,-0.031051636,-0.0035362244,0.0087509155,-0.026748657,-0.08215332,-0.011299133,0.05053711,0.025756836,0.020751953,0.008041382,0.028839111,0.0027542114,-0.021224976,-0.0051574707,0.010238647,-0.035247803,-0.0039596558,-0.038238525,0.047790527,0.012634277,-0.018707275,0.024169922,0.019485474,0.027328491,-0.00095176697,0.028640747,-0.03161621,0.0029411316,-0.008964539,0.015686035,-0.015365601,0.0069503784,0.034851074,-0.06100464,0.028289795,0.0052375793,0.017715454,0.028289795,0.013832092,0.02670288,-0.03881836,-0.015090942,0.013786316,-0.0052948,0.05279541,-0.028320312,0.0035152435,0.00831604,-0.008712769,-0.008262634,-0.031982422,-0.023101807,-0.023773193,-0.02468872,0.030853271,0.017730713,-0.008415222,-0.0022296906,0.021270752,-0.003818512,0.007911682,0.00712204,-0.035217285,-0.022491455,-0.041503906,-0.0057525635,0.025802612,-0.011909485,-0.014701843,0.026229858,0.0368042,0.022949219,0.004135132,-0.0074768066,-0.005039215,0.03186035,-0.0014314651,-0.010314941,0.030944824,-0.010108948,0.027297974,0.012138367,0.014816284,-0.053344727,-0.045288086,-0.0140686035,0.0007305145,0.01171875,-0.0079956055,0.0096588135,0.02053833,0.014701843,-0.0072517395,-0.039154053,0.013534546,-0.027191162,-0.03503418,-0.013923645,-0.0206604,0.028213501,-0.0069999695,-0.018936157,0.005935669,0.012634277,0.03616333,0.0040664673,0.014831543,0.028198242,0.03479004,0.011726379,-0.039794922,0.005657196,-0.022491455,-0.020568848,0.0034160614,-0.009056091,0.0052223206,0.023101807,0.0012969971,0.00010448694,0.019943237,0.027175903,0.0048828125,0.0039253235,0.01398468,0.02973938,-0.018066406,0.0259552,-0.036956787,0.011817932,0.021972656,-0.004219055,-0.0030403137,0.008155823,-0.018066406,0.039215088,0.014640808,-0.021011353,0.025726318,-0.0096206665,0.044708252,-0.027893066,-0.008369446,-0.0039787292,-0.00699234,-0.002319336,0.017440796,0.021408081,0.0064468384,0.03717041,-0.036132812,0.01701355,-0.0030403137,0.012321472,0.007633209,-0.0093307495,-0.014930725,-0.019851685,-0.003932953,-0.022903442,-0.027175903,-0.0066184998,-0.014045715,0.07324219,0.00806427,0.0063819885,0.03567505,0.008735657,0.021560669,-0.03427124,-0.03173828,0.0058135986,-0.02444458,0.023544312,-0.028320312,0.032684326,0.04437256,0.010139465,0.05142212,0.00995636,0.031585693,0.011917114,-0.0020999908,-0.022247314,0.009178162,-0.027420044,0.019866943,-0.017120361,0.05697632,-0.03479004,-0.009895325,-0.0067443848,0.043518066,-0.01878357,0.023712158,0.054534912,0.046661377,-0.018341064,0.044921875,0.010437012,-0.026504517,-0.01914978,-0.007965088,0.05682373,0.028442383,0.023666382,0.042755127,0.015701294,0.00819397,0.0038471222,-0.017868042,-0.024093628,0.03643799,0.04901123,-0.022964478,-0.021026611,-0.00617218,-0.01727295,-0.032226562,-0.019821167,0.011077881,0.0030975342,0.020217896,-0.00076150894,0.0001103282,-0.019729614,0.027816772,0.028411865,-0.003293991,-0.021087646,0.010246277,0.0018892288,-0.009506226,0.017028809,-0.0032997131,0.014183044,-0.023483276,-0.015686035,0.02192688,0.032592773,-0.010246277,-0.018569946,0.0054130554,0.010047913,0.021026611,0.026504517,-0.029876709,-0.005859375,0.009170532,0.015266418,0.008430481,0.04269409,0.018829346,0.016860962,0.040374756,0.03225708,0.014671326,-0.0345459,0.0013313293,0.009437561,0.020462036,0.0011005402,-0.0010147095,0.014907837,-0.015853882,0.035064697,0.009513855,-0.0071411133,0.020217896,0.012023926,-0.0033721924,-0.006362915,0.0069503784,0.007785797,-0.02067566,-0.008644104,0.00041127205,-0.016937256,0.006538391,0.012519836,0.029190063,-0.019485474,0.06149292,0.021759033,-0.0284729,-0.019454956,0.018218994,-0.03074646,-0.009742737,-0.008331299,-0.0027751923,-0.039886475,0.034240723,0.005355835,0.021133423,0.0287323,-0.0018081665,-0.018951416,0.015403748,0.018478394,0.032409668,-0.0046424866,-0.003189087,-0.039489746,0.026031494,0.038879395,0.0016078949,0.005054474,-0.017944336,-0.004447937,0.0104522705,-0.0038414001,0.009170532,-0.010124207,-0.017333984,-0.038848877,0.010261536,0.022109985,0.0059432983,0.04598999,-0.010871887,-0.030929565,-0.00088882446,0.02027893,0.014320374,0.0029945374,-0.0060043335,0.020828247,-0.030136108,0.02456665,0.03869629,-0.0037879944,0.02935791,0.005958557,-0.0134887695,-0.004501343,0.00019991398,0.023712158,-0.03503418,-0.014556885,-0.0063056946,0.004016876,0.0003848076,-0.024246216,-0.0010643005,-0.015342712,-0.014083862,-0.030944824,0.018234253,0.003194809,0.021209717,0.019577026,0.02281189,-0.021240234,0.057037354,-0.0065994263,0.032806396,-0.017608643,0.008979797,0.054107666,0.020217896,0.05001831,0.013809204,0.0051879883,-0.025268555,0.004016876,0.010444641,0.016448975,0.028411865,0.013572693,-0.03274536,0.047912598,-0.012069702,0.046020508,0.015075684,-0.0067825317,0.0039367676,-0.012779236,-0.009803772,0.003850937,-0.013076782,0.018234253,0.04849243,-0.026657104,-0.006412506,-0.0027236938,-0.014122009,0.01927185,-0.0060310364,-0.000012099743,0.010894775,-0.00415802,0.0075531006,-0.014602661,0.0021915436,0.002286911,0.030426025,-0.040985107,-0.019577026,0.011604309,0.020553589,-0.020202637,0.033203125,0.04547119,-0.0068969727,0.012779236,0.02583313,-0.01701355,0.03677368,-0.0012588501,0.020996094,0.03842163,0.0023784637,0.015991211,0.028808594,-0.0034923553,-0.026321411,0.0023460388,0.022094727,-0.0036087036,0.00762558,0.0236969,0.017425537,-0.0030269623,0.0026874542,-0.012184143,0.008239746,-0.019226074,-0.007820129,0.0043525696,0.0234375,0.008560181,0.010543823,-0.0036754608,0.0023288727,0.02746582,0.03540039,0.035217285,-0.04055786,-0.00957489,0.0158844,0.01525116,-0.005004883,-0.009101868,-0.0141067505,-0.02583313,-0.012420654,0.02029419,-0.01285553,0.02178955,-0.034332275,-0.021942139,0.048339844,0.02243042,0.032348633,0.017196655,-0.016082764,0.03540039,0.0060577393,-0.009536743,-0.00056934357,-0.017700195,0.026306152,0.020385742,-0.0026016235,-0.017196655,0.014602661,-0.011268616,-0.004337311,0.023162842,-0.009277344,0.02142334,-0.015930176,0.003944397,0.010040283,0.0066986084,-0.020217896,-0.017868042,-0.0047073364,0.018875122,0.044830322,-0.011947632,-0.0034065247,0.026870728,0.017608643,0.010391235,0.043823242,0.00182724,0.037963867,0.009101868,-0.01927185,-0.016326904,0.015090942,-0.009300232,-0.03186035,0.009719849,-0.040405273,-0.03237915,0.038085938,-0.0042152405,-0.009941101,-0.03656006,0.009933472,-0.012191772,-0.024749756,0.026473999,0.008049011,0.017669678,-0.0073661804,0.005290985,0.035095215,-0.03186035,-0.03729248,0.0018835068,0.00006824732,-0.031463623,-0.05718994,0.00095796585,0.007537842,0.0048294067,-0.014793396,-0.0061798096,-0.013626099,0.0209198,-0.017044067,-0.008972168,-0.0074768066,0.026748657,0.012939453,0.00048017502,0.016342163,-0.024978638,-0.03277588,-0.021759033,0.027267456,-0.019317627,0.028137207,-0.0062294006,0.02015686,0.007911682,-0.0021266937,0.003162384,0.008216858,-0.0007843971,0.0021381378,-0.039245605,-0.016601562,0.024597168,0.0289917,0.005355835,-0.008094788,0.04019165,-0.028518677,-0.0041160583,0.024810791,0.025177002,0.012252808,0.005558014,0.006538391,0.00063180923,-0.01612854,0.016220093,-0.03704834,-0.0026779175,-0.023895264,0.009979248,0.0055503845,0.022247314,0.020950317,-0.008628845,-0.011703491,0.025238037,0.029586792,0.014755249,0.022964478,0.020843506,-0.018356323,-0.007980347,-0.023635864,0.010986328,0.02406311,0.014198303,0.014266968,-0.0063819885,0.0016698837,-0.0112838745,0.035217285,0.016052246,-0.0028457642,-0.030975342,-0.017486572,-0.05429077,0.028961182,0.002790451,0.030151367,-0.003982544,0.028396606,-0.0005774498,-0.050720215,-0.01739502,0.05758667,-0.000333786,-0.0018634796,-0.029205322,0.009719849,0.015403748,-0.03704834,0.0087890625,-0.028396606,-0.030899048,-0.0134887695,-0.004371643,0.026428223,0.006576538,-0.013038635,-0.0043563843,-0.0046195984,0.020217896,0.021453857,0.027023315,-0.019470215,-0.00712204,0.0134887695,0.016525269,-0.010375977,-0.0132751465,0.011207581,-0.00504303,0.017440796,-0.025405884,0.026977539,-0.021743774,0.011947632,0.010848999,-0.00017035007,0.015808105,0.006011963,0.013961792,-0.013908386,-0.0022640228,-0.0005502701,0.00699234,0.04699707,-0.02130127,-0.032104492,0.006713867,-0.012641907,-0.023788452,-0.009979248,-0.003566742,0.015167236,-0.04321289,0.020980835,-0.011306763,-0.008178711,0.017868042,-0.0047798157,-0.030944824,-0.003282547,0.029586792,0.008712769,-0.008552551,-0.010513306,-0.011314392,-0.033721924,-0.02911377,0.0021743774,-0.0071792603,-0.0061798096,0.016067505,-0.0010023117,0.05117798,-0.013015747,0.01550293,0.019073486,0.026672363,0.042999268,0.023910522,0.044128418,0.018081665,-0.038024902,0.01638794,-0.0024719238,-0.04421997,0.0096588135,-0.017211914,-0.009918213,-0.035186768,-0.0073661804,-0.0044517517,0.02420044,0.020111084,0.0045051575,-0.0109939575,0.018966675,-0.029953003,-0.010414124,-0.023101807,0.012825012,0.050445557,0.018966675,0.0008482933,-0.005004883,-0.015701294,0.0491333,0.06774902,-0.01335144,-0.010948181,-0.008560181,0.032928467,-0.0064086914,0.0019931793,0.0012168884,-0.021011353,-0.01133728,-0.008110046,-0.010955811,0.0135650635,-0.018859863,-0.0022506714,0.00932312,-0.007774353,-0.015151978,0.025909424,-0.011192322,-0.011459351,0.0063972473,-0.011566162,0.019210815,0.025390625,-0.005256653,0.01322937,0.020187378,-0.03463745,0.051849365,0.005256653,0.002275467,0.011077881,0.005531311,-0.024673462,-0.0135650635,-0.005619049,-0.0021705627],"createdAt":"2026-04-21T18:32:27.977Z","updatedAt":"2026-04-22T18:33:27.491Z","lastSeenAt":"2026-04-22T18:33:27.491Z","tsv":"'/api/v1/nfts/33/owner':88 '/request':170 '0.02':11,24,75,127,169 '000':123 '0x8335':114 '20':122 '2913':115 '33':37 '402':107 '6':131 'Base USDC micropayment API' 'NFT owner lookup' 'NFT ownership API' 'accept':89 'access':215 'actual':230 'ai/ml':58 'analyt':57 'api':49,136,164,214 'application/json':219 'asset':112 'avail':163 'base':9,22,83,117,124 'base-network' 'beyond':186 'broader':43 'call':101,144,232 'categori':165 'challeng':108 'commit':142 'confirm':167 'contract':113 'data':4,17,56 'decim':132 'descript':211 'detail':179 'document':154 'endpoint':28,65,87,188,194 'exact':204 'exampl':185 'explicit':197 'field':212 'finance/web3':60 'format':206 'gate':94 'given':128 'header':153 'homepag':201 'i.e':126 'individu':147 'infer':59,208 'inform':34 'infrastructur':62 'key':137 'land':160 'limit':139 'list':162,198 'lowpaymentfee.com':30 'maxamountrequir':120 'micropay':7,20 'mimetyp':218 'minim':156 'model':73 'network':84 'nft':2,15,32,36,192 'nft-ownership-query' 'nft-specif':191 'no-api-key' 'offer':50 'openapi':176 'ownership':3,16,33 'page':161 'paid':146,231 'part':40 'pay-per-call NFT data' 'payment':98,103,152 'per':12,25,76 'per-request-billing' 'platform':68 'post':90 'premium':213 'price':72,171 'protocol':48,99 'provid':54,158 'queri':1,14 'rate':138 'request':13,26,77,91 'request/response':180 'respons':205,222 'return':31,105 'schema':181 'settl':78 'share':69 'span':55 'spec':177 'specif':86,193 'specifi':109 'structur':223 'subscript':141 'suit':44 'token holder query' 'treat':220 'uncertain':225 'uniform':71 'unit':125 'url':189 'usag':184 'usdc':80,111,129 'usdc-micropayment' 'util':63 'verifi':227 'via':5,18,148 'without':102 'x':151 'x-payment':150 'x402':6,19,47,97 'x402 NFT endpoint' 'x402-payment' 'x402-protocol':46","prices":[{"id":"fd14751c-1d03-4546-b5c4-426ebdbb8bfa","listingId":"a9fe6903-128e-4602-95d2-54310c45908b","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/33/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":"2026-04-21T18:32:27.977Z"}],"sources":[{"listingId":"a9fe6903-128e-4602-95d2-54310c45908b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/33/owner","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.977Z","lastSeenAt":"2026-04-22T18:33:27.491Z"}],"details":{"listingId":"a9fe6903-128e-4602-95d2-54310c45908b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/33/owner \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/33/owner"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/33/owner"}],"useCases":["Checking the current owner of a specific NFT programmatically","Integrating NFT ownership verification into agent workflows","Building dashboards that display NFT holder information"],"bestFor":["Agents needing on-demand NFT ownership data without API key management","Developers experimenting with x402 micropayment-gated APIs","Low-volume, pay-as-you-go NFT data lookups"],"notFor":["Bulk or batch NFT ownership queries across many token IDs","Users who need detailed NFT metadata (traits, images, history) beyond ownership","Applications requiring sub-cent transaction costs (the $0.02 floor applies per call)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.449Z"},"updatedAt":"2026-04-22T18:33:27.491Z"}}