{"id":"c7eb6dea-bec7-4b10-90db-bf2e72b43919","shortId":"NZb2Nz","kind":"x402","title":"x402-gated portfolio data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated portfolio data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a specific portfolio resource (ID 85) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 \"exact\" scheme to a specified wallet address, with no API keys or rate limits required.\n\nThe broader lowpaymentfee.com platform hosts a variety of pay-per-call API endpoints spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request and settle on the Base network using USDC. However, this specific listing is for the `/api/v1/portfolios/85` endpoint, whose exact response payload is undocumented — the description simply reads \"Premium API Access\" with a JSON MIME type.\n\nNo OpenAPI schema, detailed documentation, or example responses are available for this endpoint. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no additional content. The nature of the \"portfolio\" data returned is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","portfolio-data","json-response"],"categories":["finance","data"],"synonyms":["portfolio API","x402 portfolio","pay-per-call API","USDC API","Base network API","lowpaymentfee","premium API access"],"warnings":["No documentation available — docs, pricing, and API pages render only 'Connect wallet' with no content","The exact data returned by /api/v1/portfolios/85 is undocumented; 'Premium API Access' is the only description","No OpenAPI or output schema provided beyond mimeType: application/json","Cannot verify what 'portfolio' data is served or its accuracy/freshness"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/85","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/portfolios/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI schema, no documentation beyond a one-line description, no example request/response, and the portfolio data content is entirely unspecified. The docs pages are empty. This is 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":"2026-04-19T09:01:01.628Z","embedding":[-0.0011901855,-0.017974854,0.045318604,0.01158905,0.022781372,-0.00894165,-0.019729614,0.014503479,0.06616211,-0.06088257,0.031829834,-0.049865723,-0.024459839,-0.043518066,-0.0063171387,-0.006340027,0.018157959,-0.005138397,-0.06842041,0.058898926,0.021606445,-0.014343262,-0.023132324,0.030136108,-0.010147095,-0.007926941,-0.0010681152,-0.005718231,-0.015472412,-0.032165527,0.03878784,-0.018127441,0.0051994324,0.014533997,-0.033599854,-0.0027332306,-0.001045227,0.043548584,0.027511597,-0.010070801,0.0154953,-0.040985107,0.022735596,-0.012107849,-0.01235199,-0.010536194,0.029541016,-0.046325684,0.02116394,0.0134887695,-0.03286743,-0.016281128,-0.013412476,0.016784668,0.011329651,0.012290955,0.02330017,0.006061554,0.0064582825,0.01965332,0.0063667297,-0.052612305,-0.0035209656,0.01322937,0.0037250519,0.039978027,-0.037628174,0.052368164,-0.0052948,0.078063965,0.030715942,0.05532837,0.029907227,0.0072288513,-0.011314392,-0.024780273,-0.01927185,0.035705566,-0.0071907043,-0.037902832,-0.0020694733,0.005470276,-0.06591797,-0.0010204315,-0.02229309,-0.047454834,-0.010498047,0.01727295,-0.033477783,0.046173096,-0.08728027,-0.008178711,-0.02079773,0.013908386,-0.010971069,-0.0011644363,0.010055542,0.017974854,-0.01222229,0.01902771,0.004989624,-0.036468506,0.0010118484,0.019866943,0.04525757,0.03857422,0.017822266,0.046905518,-0.0129776,-0.01965332,-0.036956787,0.0030021667,-0.02178955,0.02520752,-0.0019083023,-0.013374329,-0.03845215,0.028076172,-0.021392822,0.022979736,-0.059295654,0.019805908,0.020477295,0.0034446716,0.0124053955,-0.022140503,-0.03881836,-0.010803223,-0.018859863,-0.030761719,0.010238647,0.0007314682,0.0093688965,-0.016296387,-0.017105103,0.0015258789,-0.023239136,-0.036499023,-0.051513672,-0.0011291504,0.024246216,-0.039611816,0.04046631,0.0058403015,-0.09301758,0.029220581,-0.027938843,0.04119873,-0.024429321,0.0013360977,-0.008255005,0.026107788,-0.017959595,-0.0037574768,-0.0021018982,-0.036193848,-0.014961243,0.018035889,0.006210327,0.036499023,-0.0055999756,0.03744507,0.016235352,0.006374359,0.040039062,0.039611816,-0.013893127,-0.07244873,-0.07421875,-0.022964478,0.0059814453,-0.014785767,-0.013496399,-0.005428314,0.010353088,-0.09802246,-0.020462036,0.004207611,0.010765076,-0.02166748,-0.023880005,-0.039001465,0.012649536,-0.0017337799,-0.052093506,0.017822266,-0.019546509,0.049316406,0.009864807,0.025390625,0.048797607,-0.00047707558,0.051696777,0.03552246,-0.0440979,-0.020751953,-0.00844574,-0.013092041,-0.00003427267,-0.014305115,0.018554688,-0.018035889,0.044921875,0.04562378,-0.013534546,-0.0047454834,0.018341064,-0.067871094,-0.018035889,-0.020248413,0.03314209,0.008178711,-0.040374756,0.02432251,-0.012161255,-0.046569824,0.0073547363,0.018096924,0.021850586,0.06677246,-0.00006258488,0.028930664,0.022201538,-0.0087890625,-0.0309906,0.037322998,0.026763916,0.0030155182,-0.0107421875,-0.04156494,0.017196655,0.013641357,-0.012809753,-0.0028705597,-0.00983429,0.010620117,-0.035308838,-0.015533447,0.023330688,-0.028244019,-0.015457153,-0.04095459,-0.004714966,0.03074646,-0.0013275146,-0.007297516,-0.024841309,-0.08013916,0.027145386,0.057525635,0.012466431,-0.007194519,0.0013151169,-0.03665161,0.008804321,-0.04107666,0.025543213,0.06390381,-0.005882263,-0.018371582,0.013885498,-0.012374878,-0.0069847107,-0.022521973,-0.013496399,-0.018829346,-0.021408081,-0.0044898987,-0.06573486,0.020202637,0.013717651,0.020996094,0.025131226,-0.02331543,-0.0670166,0.0009965897,-0.018325806,-0.0031528473,-0.052001953,-0.01876831,0.015258789,0.022140503,0.009025574,0.012809753,0.024856567,-0.01209259,0.02041626,0.027297974,-0.014457703,-0.01928711,-0.0079574585,0.014457703,0.021362305,-0.0847168,0.018981934,-0.0021381378,0.040740967,-0.042510986,0.032348633,-0.014656067,0.024871826,0.035369873,-0.021865845,-0.059814453,0.0149383545,0.0023231506,0.031097412,0.040283203,-0.016036987,-0.009346008,-0.030670166,0.049957275,-0.004070282,-0.0040245056,-0.007835388,0.02418518,0.03189087,-0.015975952,-0.030532837,-0.031433105,0.008598328,-0.034698486,0.017120361,-0.009353638,0.010848999,-0.008735657,0.009567261,-0.009902954,-0.004032135,-0.029373169,0.005466461,-0.004714966,-0.002664566,0.00066041946,-0.009941101,0.0032577515,0.0015382767,0.0043411255,0.0052490234,0.013130188,0.017318726,-0.0061187744,-0.03729248,-0.04043579,0.0053634644,-0.031799316,0.03579712,0.05227661,0.01675415,0.011741638,-0.022781372,-0.0050964355,0.017745972,0.030639648,0.0496521,-0.011100769,0.0075187683,-0.05291748,-0.07287598,-0.02267456,-0.018737793,0.03286743,0.034240723,0.012413025,0.034851074,0.024871826,-0.012580872,-0.05508423,0.058532715,-0.05368042,0.009284973,0.050109863,-0.0154953,-0.029083252,0.0093307495,0.015068054,0.005126953,0.04360962,0.014633179,0.008094788,0.0435791,0.027252197,0.0021858215,-0.001996994,0.025238037,0.012634277,0.0030498505,-0.0146865845,-0.026794434,0.00409317,0.008895874,-0.019805908,-0.033477783,-0.08483887,0.02532959,0.0209198,0.08325195,0.038482666,0.021102905,0.012451172,-0.029541016,-0.010261536,-0.0423584,-0.012199402,-0.033843994,-0.03753662,0.030075073,-0.003768921,0.031585693,-0.023010254,0.038238525,-0.011695862,0.018997192,-0.031066895,0.05215454,-0.011787415,-0.0058288574,-0.0023174286,0.0020160675,0.03982544,0.05908203,-0.026046753,0.04815674,0.02784729,-0.025390625,-0.0035915375,0.04510498,-0.0072402954,-0.020233154,-0.0647583,-0.041809082,0.002412796,-0.0055999756,-0.024734497,-0.0027980804,-0.0011425018,0.032836914,0.0026283264,-0.025054932,-0.0066337585,0.011932373,0.0084991455,-0.05444336,-0.015625,-0.05456543,0.01423645,0.052368164,0.0041999817,-0.024398804,0.007785797,-0.031799316,0.016311646,0.025466919,-0.00061416626,-0.008560181,-0.02470398,0.020095825,-0.0026741028,0.011238098,0.025009155,0.043029785,0.04083252,0.0010738373,0.06665039,0.025558472,-0.011260986,-0.04724121,-0.006175995,-0.05419922,-0.0073623657,0.016357422,-0.007183075,-0.0034809113,-0.015602112,-0.021347046,-0.0008702278,0.009315491,-0.037384033,0.0067367554,0.027740479,-0.023513794,-0.040374756,-0.07519531,-0.026947021,0.018371582,0.08959961,0.029953003,-0.009613037,-0.026382446,-0.004207611,0.031555176,-0.007843018,0.043426514,-0.013908386,-0.010398865,-0.009437561,-0.04449463,-0.013496399,-0.011543274,0.023147583,0.0015230179,-0.023086548,0.012641907,-0.008544922,0.010101318,-0.019165039,-0.010719299,0.007259369,-0.01436615,0.009178162,-0.010719299,0.048919678,0.000626564,-0.0124053955,-0.039764404,0.029312134,-0.0024852753,0.022567749,-0.043060303,-0.01374054,0.016204834,-0.005996704,-0.009590149,-0.041503906,-0.007423401,0.010299683,-0.044799805,-0.09051514,0.053344727,-0.029190063,0.010353088,-0.0049934387,-0.00061798096,0.016052246,-0.013893127,0.012275696,0.004306793,-0.022705078,-0.025283813,-0.041534424,-0.03375244,-0.028915405,-0.014442444,-0.021408081,0.031311035,-0.028457642,0.02267456,-0.012840271,-0.043518066,0.03543091,0.029647827,0.011131287,0.01953125,-0.002746582,0.004261017,0.046020508,0.008232117,-0.036346436,0.02116394,-0.006717682,0.0043144226,0.016845703,0.054779053,0.016464233,-0.012504578,0.02027893,0.0025787354,-0.026519775,-0.03414917,-0.015106201,-0.0015907288,0.025039673,-0.017959595,-0.029449463,0.021713257,0.03353882,-0.030761719,-0.0368042,0.02470398,0.03338623,-0.0423584,0.029846191,0.004135132,0.031921387,-0.037628174,0.028320312,-0.0015478134,0.029876709,0.019470215,-0.000770092,-0.019119263,0.0032234192,-0.022338867,-0.004966736,0.012878418,-0.0028743744,0.008300781,0.0053710938,0.03677368,0.014541626,0.024002075,-0.025238037,-0.035003662,0.026519775,-0.013153076,-0.022491455,0.040008545,0.014152527,0.0129470825,0.008415222,0.033935547,0.030822754,-0.017410278,-0.015396118,-0.016983032,0.03366089,-0.002986908,0.019439697,0.008674622,-0.0040626526,0.023468018,-0.045715332,-0.009460449,0.008758545,0.011451721,-0.010437012,-0.042510986,-0.032073975,-0.0038967133,0.013679504,0.0079193115,-0.0021896362,0.013191223,0.002527237,-0.006252289,-0.013053894,0.0067367554,0.010276794,-0.026565552,-0.060668945,-0.010353088,0.01159668,0.01184845,-0.024597168,0.024215698,-0.03125,-0.026748657,-0.000062286854,-0.031677246,0.001420021,0.0013523102,-0.001247406,0.011138916,-0.003364563,0.018707275,-0.008293152,-0.05130005,0.022918701,-0.026184082,0.07836914,-0.052978516,0.019470215,-0.00920105,-0.01436615,-0.0066871643,0.013999939,0.0146484375,0.04135132,0.0064430237,0.040405273,-0.034088135,0.045043945,-0.029724121,0.018722534,0.009811401,-0.053344727,-0.0030021667,-0.018737793,-0.005970001,0.043945312,-0.014518738,-0.01084137,-0.039886475,-0.022949219,-0.006538391,-0.037475586,0.022140503,0.01763916,0.046691895,-0.02999878,-0.00749588,0.01474762,0.012825012,-0.008514404,-0.027694702,-0.0011930466,0.007423401,0.021377563,0.02305603,-0.027923584,-0.0030593872,-0.0075912476,0.0068206787,-0.044158936,-0.028457642,-0.009590149,0.0018005371,-0.02758789,0.016494751,-0.008834839,-0.01701355,-0.006149292,-0.037139893,-0.008834839,-0.0017557144,0.014099121,0.01461792,-0.016494751,-0.009223938,0.019332886,-0.021560669,0.023864746,0.00055933,-0.014045715,-0.049835205,0.005584717,-0.007850647,0.029067993,-0.0146865845,-0.018432617,0.0023479462,-0.027404785,-0.062408447,-0.00063848495,0.0039024353,-0.018661499,0.013572693,-0.030761719,-0.035308838,0.005996704,-0.031799316,0.007411957,0.004562378,-0.01234436,0.0025844574,-0.0112838745,0.012756348,0.025222778,-0.004764557,-0.028381348,0.003490448,0.00970459,0.011207581,0.024414062,0.027557373,-0.022735596,-0.018112183,0.010444641,0.00090026855,-0.0004708767,-0.041381836,0.017593384,-0.018035889,-0.0007367134,-0.004623413,0.008613586,-0.028457642,0.029754639,0.0670166,0.00080537796,-0.015037537,0.0023975372,-0.015975952,0.015014648,0.040893555,-0.030822754,-0.01020813,-0.047424316,0.013870239,-0.009017944,0.04345703,0.0024147034,0.02255249,-0.015014648,-0.01676941,-0.00080919266,0.0099487305,0.009231567,-0.036590576,-0.017303467,-0.039489746,-0.010047913,-0.029876709,-0.03186035,0.019042969,0.025512695,-0.018539429,-0.06451416,0.0003221035,0.06036377,0.005657196,0.011924744,-0.003534317,0.035705566,0.020706177,-0.02355957,0.00028896332,0.00048065186,-0.04473877,-0.0079574585,-0.026641846,0.013114929,-0.01927185,-0.017852783,0.024108887,-0.012001038,0.025634766,-0.009674072,0.025390625,-0.0038871765,0.011528015,-0.017684937,0.01939392,-0.018417358,-0.0335083,0.034851074,-0.028045654,0.030258179,0.02758789,0.026382446,-0.0051612854,0.011894226,0.04788208,-0.043029785,-0.007709503,0.054107666,0.01499176,0.02659607,-0.0101623535,0.03704834,0.026870728,-0.001496315,-0.005630493,-0.016464233,-0.017333984,-0.041748047,-0.015975952,0.027862549,-0.008964539,-0.009529114,-0.01953125,0.010894775,0.009178162,0.008895874,-0.0054397583,-0.034240723,-0.010055542,-0.03225708,0.0066719055,0.00031805038,0.004600525,-0.0061073303,0.013702393,0.011199951,0.018707275,-0.00010806322,0.008453369,0.016281128,0.034423828,-0.0036334991,-0.0063056946,0.0070228577,0.015052795,0.021362305,-0.008216858,0.021850586,-0.04107666,-0.022323608,-0.015335083,-0.011810303,-0.0015478134,-0.015434265,0.011878967,-0.004070282,0.0044517517,-0.015052795,-0.036499023,-0.010818481,-0.01687622,-0.022018433,0.0022697449,-0.0048942566,0.0021629333,0.022827148,0.004245758,0.0045318604,-0.027938843,0.027694702,-0.002532959,-0.006511688,0.025772095,0.029418945,-0.010322571,-0.036987305,-0.009132385,-0.02470398,-0.040374756,0.011550903,-0.0063705444,-0.008239746,0.036224365,0.007144928,0.010307312,0.0072669983,0.032409668,-0.0107040405,0.020874023,0.010475159,0.01689148,-0.042114258,0.017593384,-0.04083252,0.0103302,0.0152282715,0.0385437,-0.0006904602,-0.021347046,-0.0259552,0.02558899,0.025253296,-0.01222229,0.04537964,0.006576538,0.038024902,-0.00705719,-0.016143799,-0.00030589104,-0.0027065277,-0.015357971,0.04119873,-0.0019311905,0.011161804,0.008003235,-0.008918762,0.0005850792,-0.034088135,0.010681152,0.016311646,-0.0038394928,-0.048583984,-0.047058105,-0.016647339,0.0036811829,-0.03930664,0.010147095,0.009399414,0.026443481,0.04324341,0.02418518,0.00097084045,0.007686615,0.013206482,-0.04058838,-0.023620605,0.00040841103,-0.017715454,0.02520752,-0.008331299,0.045166016,0.06088257,0.0032787323,0.035705566,0.034118652,0.014633179,0.007335663,0.005256653,-0.025924683,0.031433105,-0.010360718,0.024398804,0.023864746,0.042419434,-0.026611328,0.0178833,-0.0017194748,0.015434265,-0.023712158,0.0256958,0.083862305,0.033599854,-0.0069999695,0.041809082,-0.0036811829,-0.02458191,-0.010948181,-0.021713257,0.05935669,0.00053167343,0.036254883,0.03692627,0.0104599,-0.02067566,-0.0064201355,-0.020858765,-0.04458618,0.04006958,0.03515625,-0.009429932,0.0016050339,-0.0057754517,0.0055007935,-0.04711914,-0.032318115,0.018478394,0.011199951,0.023712158,-0.022094727,-0.0058135986,-0.029190063,0.013038635,0.018692017,0.0017642975,-0.016784668,0.040222168,0.026870728,0.005569458,0.021270752,-0.01474762,0.0446167,-0.001783371,-0.014389038,0.010261536,0.024658203,0.0056381226,-0.0070762634,0.012252808,-0.00021827221,0.028320312,0.038269043,-0.020629883,-0.006793976,0.02381897,0.0046958923,-0.018356323,0.037597656,0.022033691,0.017654419,0.043426514,0.034729004,0.023925781,-0.027633667,0.007949829,-0.011062622,0.010276794,-0.0017147064,-0.013755798,0.013191223,-0.023590088,0.010528564,-0.0019416809,-0.023895264,0.032409668,0.017974854,0.0025539398,-0.0015678406,-0.0075645447,0.016098022,-0.010696411,-0.009208679,-0.0046195984,0.008872986,0.031097412,0.03253174,0.03866577,-0.0071640015,0.030670166,0.0058784485,-0.017532349,-0.00970459,0.015129089,-0.02432251,-0.011528015,-0.0065841675,-0.011695862,-0.050201416,0.02218628,0.014328003,0.007499695,0.016326904,-0.0020217896,-0.01058197,-0.00095176697,0.012893677,0.01209259,-0.02571106,-0.0017309189,-0.0127334595,0.017181396,0.041381836,-0.0039253235,0.013572693,-0.003419876,-0.0042495728,0.0063056946,-0.0012512207,-0.019134521,-0.010932922,0.018081665,-0.037841797,0.0015392303,0.02218628,0.015068054,0.064819336,-0.0047569275,-0.014839172,-0.006259918,0.027252197,0.0042419434,-0.0010843277,-0.005203247,0.011459351,-0.018417358,0.042175293,0.033294678,0.0003592968,0.026763916,-0.024856567,-0.019515991,-0.016662598,-0.005809784,0.022064209,-0.01637268,-0.0087890625,-0.020355225,0.039520264,-0.024475098,-0.047912598,0.010032654,-0.022537231,-0.014877319,-0.033813477,0.015716553,-0.0027275085,0.017440796,0.020492554,0.021606445,-0.036224365,0.05532837,-0.013969421,0.038085938,-0.035461426,-0.004573822,0.05206299,0.029373169,0.045074463,0.011222839,0.0016012192,-0.030822754,-0.007335663,0.027709961,0.015258789,0.021636963,0.00087070465,-0.0061683655,0.029541016,-0.002828598,0.018722534,-0.00680542,0.011657715,0.01360321,-0.01940918,0.010673523,-0.0082092285,0.01524353,0.020904541,0.02999878,-0.013076782,0.016616821,-0.029342651,-0.0026664734,0.028915405,0.010902405,0.0077934265,-0.008422852,-0.029830933,0.027359009,-0.021499634,-0.030670166,-0.000069618225,0.0138549805,-0.06378174,-0.017791748,0.008903503,0.015510559,-0.036010742,0.055419922,0.0034255981,-0.004508972,0.024230957,0.042053223,-0.010261536,0.04852295,-0.0063476562,0.04095459,0.04473877,0.0010271072,-0.019332886,0.028579712,0.019012451,-0.012748718,0.027252197,0.041290283,0.0065460205,0.028808594,-0.013076782,-0.00044846535,0.0014486313,0.0138168335,-0.027618408,0.007610321,-0.008277893,-0.008354187,0.0042686462,0.016921997,-0.00055885315,-0.009246826,-0.011314392,0.001613617,0.0033626556,0.038391113,0.026870728,-0.02470398,0.016860962,-0.0013847351,0.022033691,-0.011245728,-0.016159058,-0.0048294067,-0.037597656,0.007457733,0.030639648,-0.008026123,0.026260376,-0.02519226,0.00541687,0.03692627,0.013847351,0.032409668,0.02041626,-0.018615723,0.016738892,-0.005607605,-0.00007665157,-0.007972717,-0.00111866,0.0090408325,0.0041389465,0.017059326,-0.024978638,0.016799927,-0.028686523,0.0026130676,0.0107040405,0.01689148,0.032409668,-0.015144348,0.0026950836,0.017425537,0.02999878,-0.008338928,-0.028015137,-0.01574707,0.017868042,0.07122803,-0.0018177032,0.0048217773,0.017974854,0.03277588,0.019012451,0.05291748,0.017608643,0.0231781,0.019485474,-0.013648987,-0.005088806,0.042419434,-0.0015792847,-0.037139893,0.024230957,-0.019973755,-0.015731812,0.0289917,0.012031555,0.006134033,-0.030410767,-0.0027542114,-0.025939941,-0.0357666,0.00052785873,-0.018981934,-0.009643555,-0.0036296844,-0.014190674,0.016067505,-0.012191772,-0.020187378,-0.026901245,0.014213562,-0.0026340485,-0.058288574,-0.018829346,-0.02305603,0.0073280334,-0.022567749,0.0046958923,-0.018569946,0.03515625,-0.016204834,0.0014762878,0.006462097,0.004966736,0.01524353,0.019958496,0.02519226,-0.01335907,-0.030410767,-0.019302368,-0.00058555603,-0.002292633,0.03640747,-0.016159058,0.017303467,0.028045654,-0.0018835068,-0.002193451,-0.012641907,-0.02558899,-0.015090942,-0.030822754,-0.019500732,0.011230469,0.026046753,0.0011863708,-0.01360321,0.040924072,-0.010223389,-0.033477783,-0.0017147064,0.05117798,0.023910522,0.01953125,-0.009513855,-0.0065345764,-0.045043945,0.010856628,-0.008071899,-0.0070762634,0.03253174,-0.0039749146,0.0047454834,0.010574341,0.018569946,-0.010444641,0.0066871643,0.030075073,0.02470398,-0.006095886,0.044433594,-0.0078048706,0.005847931,-0.032440186,-0.0058784485,0.0053977966,0.053985596,0.023605347,0.016555786,-0.006839752,-0.0077171326,-0.0057525635,0.014801025,0.0017881393,-0.015991211,-0.03265381,-0.023757935,-0.0040512085,0.02722168,0.005458832,0.0060043335,-0.0029640198,0.0076293945,-0.025054932,-0.032104492,-0.04168701,0.03778076,-0.0039749146,-0.024597168,0.004219055,0.016494751,0.011199951,-0.027389526,-0.010635376,-0.056640625,-0.013267517,-0.027404785,-0.0049743652,0.00642395,0.011413574,0.016784668,-0.006011963,0.01398468,-0.012710571,0.010406494,0.017471313,-0.0362854,-0.0028762817,0.02784729,0.014160156,-0.013412476,0.00844574,0.0042686462,-0.007003784,0.0069618225,-0.00019705296,0.007949829,-0.03414917,0.026794434,0.020492554,-0.005332947,0.034210205,-0.014533997,0.01940918,-0.0039749146,0.013267517,-0.016860962,-0.0024757385,0.029144287,-0.024230957,-0.027709961,-0.00086688995,-0.0021038055,-0.034851074,0.0059890747,0.01701355,0.017456055,-0.018112183,0.043823242,0.0038051605,-0.019805908,0.010375977,0.023651123,-0.010215759,-0.005104065,0.034362793,-0.003604889,-0.0027065277,0.0019369125,-0.0019369125,-0.024291992,-0.017547607,-0.00982666,-0.018997192,0.010948181,0.025024414,0.012367249,0.05230713,0.010719299,0.009712219,0.023345947,0.008232117,0.024734497,0.009895325,0.030944824,0.016357422,-0.030212402,0.0178833,-0.0030384064,-0.007030487,-0.0017986298,-0.00017035007,0.011695862,-0.011009216,0.0102005005,0.002866745,0.013694763,0.012481689,0.010551453,-0.0033626556,-0.0001295805,-0.04067993,-0.013130188,-0.01940918,-0.0010461807,0.026412964,0.02029419,0.0071754456,0.004966736,-0.024627686,0.027328491,0.020019531,-0.018356323,-0.018859863,-0.007980347,0.010665894,-0.0067749023,0.010223389,0.020874023,-0.015411377,-0.0116119385,-0.0026569366,-0.015670776,0.009628296,-0.0023784637,0.02293396,0.0051612854,-0.029647827,-0.02079773,0.029144287,-0.015838623,-0.0026187897,0.014350891,0.01272583,0.023086548,0.017120361,-0.01979065,0.013305664,0.030334473,-0.037750244,0.038024902,0.010437012,0.0025749207,-0.0077934265,0.0037021637,-0.04852295,0.011001587,-0.0066490173,-0.0013084412],"createdAt":"2026-04-18T18:53:27.265Z","updatedAt":"2026-04-27T17:05:05.110Z","lastSeenAt":"2026-04-27T17:05:05.110Z","tsv":"'/api/v1/portfolios/85':166 '0.02':10,24,69,148 '000':71 '20':70 '402':54 '6':77 '85':41 'Base network API' 'USDC API' 'access':34,180 'addit':217 'address':91 'ai/ml':117 'analysi':120 'analyt':116 'api':94,112,179,203 'avail':195,229 'base':8,22,62,72,155 'broader':101 'call':111 'challeng':55 'classif':122 'connect':212 'content':218 'convers':141 'data':5,19,115,127,224 'decim':78 'descript':175 'detail':189 'doc':200 'document':190 'embed':123 'endpoint':6,20,30,48,113,144,167,198 'estim':135 'exact':85,169 'exampl':192 'exchang':130 'feed':129 'financ':124 'gas':134 'gate':3,17 'generat':142 'geocod':139 'host':104 'howev':159 'id':40 'infer':118 'infrastructur':137 'json':183 'json-response' 'key':95 'limit':98 'list':146,162 'live':50 'lowpaymentfee' 'lowpaymentfee.com':32,102 'made':81 'materi':230 'mime':184 'natur':220 'network':63,156 'openapi':187 'page':204 'pay':9,23,109 'pay-per-cal':108 'pay-per-call API' 'pay-per-request' 'payload':171 'payment':45,57,79 'per':11,25,66,110,149 'platform':103 'portfolio':4,18,38,223 'portfolio API' 'portfolio-data' 'premium':178 'premium API access' 'price':65,128,201 'prompt':214 'protocol':46 'provid':33 'quot':133 'rate':97,131 'read':177 'render':209 'request':12,26,67,150 'requir':56,99 'resourc':39 'respons':170,193 'return':52,225 'schema':188 'scheme':86 'sentiment':119 'settl':152 'simpli':176 'site':207 'span':114 'specif':37,161 'specifi':89 'summar':121 'token':132 'type':185 'unclear':227 'undocu':173 'unit':73 'usdc':14,28,59,75,158 'usdc-base' 'use':157 'util':138 'valid':140 'varieti':106 'via':42,82 'wallet':90,213 'web3':126 'whose':168 'x402':2,16,44,84 'x402 portfolio' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"06e9d345-ee3b-43b3-bf62-753f8c91233d","listingId":"c7eb6dea-bec7-4b10-90db-bf2e72b43919","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/portfolios/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:27.265Z"}],"sources":[{"listingId":"c7eb6dea-bec7-4b10-90db-bf2e72b43919","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:27.265Z","lastSeenAt":"2026-04-27T17:05:05.110Z"}],"details":{"listingId":"c7eb6dea-bec7-4b10-90db-bf2e72b43919","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/85 \\\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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/85"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/portfolios/85"},{"claim":"All endpoints on the platform are listed at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Platform hosts endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilities","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching portfolio data on-demand with per-request USDC micropayments","Agent-driven data retrieval without API key management","Programmatic access to portfolio information via x402 protocol"],"bestFor":["Developers or agents wanting keyless, pay-per-call portfolio data access","x402-compatible agents that can settle USDC on Base","Use cases requiring low-friction, no-subscription API access"],"notFor":["Users needing detailed documentation or schema guarantees before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:58.291Z"},"updatedAt":"2026-04-27T17:05:05.110Z"}}