{"id":"52fb5bda-029f-48ee-a350-4d80f8b9127b","shortId":"4GR3RY","kind":"x402","title":"Portfolio performance data via x402 micropayment on Base network for $0.02/request.","tagline":"Portfolio performance data via x402 micropayment on Base network for $0.02/request.","description":"This endpoint at lowpaymentfee.com provides portfolio performance data through the x402 payment protocol. The specific resource `/api/v1/portfolios/5/performance` returns JSON data related to portfolio #5's performance metrics. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals).\n\nThe endpoint is part of a broader platform (lowpaymentfee.com) that offers numerous x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the portfolio performance response contains. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data contract is unknown. The POST method is specified in the outputSchema. Callers should expect a JSON response but will need to experiment to determine the exact shape of the returned data.","tags":[],"capabilities":["x402-payment","portfolio-performance","usdc-base-network","micropayment","json-api","post-method"],"categories":["finance","data"],"synonyms":["portfolio analytics","investment performance","portfolio returns","portfolio tracking","financial performance API","x402 finance endpoint"],"warnings":["No API documentation available — docs, pricing, and README pages all return only a wallet-connect prompt with no content","No request or response schema provided; the shape of the portfolio performance data is unknown","Only portfolio ID 5 is referenced in this endpoint path; it is unclear whether other portfolio IDs are supported","No rate limit, SLA, or uptime guarantees documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/5/performance","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/5/performance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The actual data returned is completely unknown, making this 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":"2026-04-19T08:36:36.554Z","embedding":[-0.007801056,-0.0014648438,0.021087646,0.018676758,0.018371582,-0.012016296,-0.040283203,-0.00055933,0.07489014,-0.03201294,0.02154541,-0.051452637,-0.026519775,-0.05895996,0.0002553463,0.0046081543,0.029968262,-0.012687683,-0.04296875,0.05429077,0.034332275,-0.017852783,-0.006336212,0.012420654,-0.010002136,-0.0032024384,-0.018463135,-0.0021133423,-0.020065308,-0.03866577,0.025543213,-0.02558899,-0.009384155,0.012840271,-0.028198242,0.0008392334,0.022216797,0.021255493,0.029891968,-0.007522583,0.005584717,-0.051971436,0.029586792,-0.0042381287,-0.02218628,-0.010108948,0.030349731,-0.046142578,0.037902832,0.019882202,-0.036193848,-0.00894928,-0.01890564,0.0236969,0.025924683,0.011672974,0.04071045,-0.00869751,-0.00012362003,0.017684937,0.0052757263,-0.050109863,0.018554688,-0.014701843,0.007457733,0.033447266,-0.027938843,0.058654785,-0.00032615662,0.07208252,0.017150879,0.042816162,0.01586914,0.021087646,-0.018508911,-0.021224976,-0.011131287,0.03555298,0.0050315857,-0.03729248,-0.009117126,0.008766174,-0.05947876,-0.015327454,-0.027877808,-0.058685303,-0.013206482,-0.008583069,-0.043548584,0.044311523,-0.076171875,0.0076522827,-0.012619019,0.00434494,-0.0010137558,-0.029174805,-0.0009965897,0.023880005,0.0135269165,0.038482666,0.012710571,-0.030578613,-0.009796143,0.024597168,0.035064697,0.042053223,0.0049858093,0.046844482,-0.013916016,-0.022750854,-0.05029297,-0.014343262,-0.0020503998,0.011726379,0.005958557,0.0015525818,-0.019073486,0.008583069,-0.025436401,0.010139465,-0.06298828,0.0385437,0.0262146,0.002729416,0.010444641,-0.044647217,-0.0052337646,-0.006439209,-0.026657104,-0.026550293,0.017105103,0.01033783,0.014503479,-0.031433105,-0.015136719,0.009635925,-0.016311646,-0.03845215,-0.05038452,-0.014701843,0.018997192,-0.037994385,0.047546387,0.007221222,-0.07470703,0.023544312,-0.009887695,0.034240723,-0.0020961761,-0.016021729,0.015808105,0.032196045,-0.021484375,0.0055007935,-0.004886627,-0.04840088,-0.016799927,0.008590698,-0.0009775162,0.014144897,0.012672424,0.032836914,-0.009941101,0.013298035,0.024856567,0.03491211,-0.013771057,-0.058898926,-0.080566406,-0.020324707,0.026626587,-0.019424438,0.002161026,-0.017669678,-0.019363403,-0.08343506,-0.001964569,-0.033111572,0.009170532,-0.03665161,-0.02734375,-0.029251099,0.00737381,-0.013389587,-0.0592041,0.029525757,-0.0051345825,0.0592041,0.012168884,0.04562378,0.042236328,0.004257202,0.039154053,0.027862549,-0.056274414,-0.017456055,-0.0060806274,-0.013687134,-0.00818634,0.010559082,0.011985779,-0.013694763,0.051605225,0.053955078,0.01171875,-0.026626587,0.0010652542,-0.06335449,-0.03149414,0.0072135925,0.0209198,0.02330017,-0.012718201,0.018997192,-0.0036525726,-0.037353516,0.008865356,0.039367676,0.020462036,0.06524658,0.025634766,0.03540039,0.033050537,0.0041618347,-0.02218628,0.041656494,0.027420044,0.0070877075,0.0030612946,-0.06567383,0.024093628,0.006061554,-0.030761719,0.012969971,0.00434494,0.012260437,-0.031311035,-0.018661499,0.0054130554,-0.018844604,0.006603241,-0.019897461,0.0035171509,0.027526855,0.02116394,0.0025672913,-0.043182373,-0.07989502,0.017532349,0.015823364,0.03869629,0.00018703938,-0.00831604,-0.013092041,0.0037460327,-0.039886475,0.009979248,0.06173706,-0.020584106,-0.010673523,0.014907837,-0.022064209,-0.030532837,-0.005393982,-0.027389526,-0.022384644,-0.04611206,-0.0038833618,-0.06689453,0.013366699,0.037628174,0.041137695,0.018432617,-0.020751953,-0.05053711,0.005054474,-0.030792236,0.020202637,-0.05618286,-0.023376465,0.016677856,0.00831604,-0.024963379,0.043884277,0.015365601,-0.006465912,0.020645142,0.021560669,0.0043945312,-0.00037288666,-0.016403198,0.0051345825,0.044830322,-0.051361084,0.008384705,-0.003545761,0.053619385,-0.028915405,0.033599854,-0.0065994263,0.040802002,0.03793335,-0.024932861,-0.05709839,0.015571594,0.00434494,0.0059051514,0.025177002,-0.025024414,-0.01713562,-0.038604736,0.056243896,-0.016204834,0.0006275177,0.009132385,0.028762817,0.03567505,-0.013389587,-0.02545166,-0.04260254,-0.029342651,-0.037017822,0.015319824,0.0074386597,0.03665161,-0.0064201355,0.008033752,-0.017044067,-0.02279663,-0.021057129,0.0064430237,-0.02281189,0.009124756,-0.0020008087,-0.008728027,0.030090332,0.006893158,-0.005077362,0.015853882,0.01977539,0.007209778,-0.015045166,-0.027542114,-0.023834229,0.00019359589,-0.035095215,0.015525818,0.033477783,-0.0043563843,0.011688232,-0.0051574707,-0.022460938,0.013366699,0.022033691,0.029785156,0.0002194643,-0.00001513958,-0.050201416,-0.093933105,-0.027633667,-0.017074585,0.021057129,0.030532837,0.0052490234,0.039642334,0.031921387,-0.008468628,-0.05303955,0.04321289,-0.04937744,-0.00045776367,0.041748047,-0.013954163,-0.014015198,-0.012680054,0.0075187683,0.008666992,0.04776001,0.015640259,0.012680054,0.03881836,0.023391724,0.00793457,-0.010169983,0.02355957,0.032196045,-0.007472992,0.0053253174,-0.05340576,0.021743774,-0.0055236816,-0.01966858,-0.042755127,-0.082092285,0.029067993,0.040924072,0.0619812,0.028121948,0.030014038,-0.007965088,-0.03994751,-0.016540527,-0.04598999,-0.0036296844,-0.0423584,-0.0579834,0.0107421875,0.00548172,0.014892578,-0.022369385,0.043273926,-0.036224365,-0.0019550323,-0.036102295,0.068481445,-0.03717041,0.0043563843,0.011291504,0.00667572,0.04815674,0.040893555,-0.02659607,0.03591919,0.01852417,-0.034423828,0.0056037903,0.047698975,-0.028442383,-0.00995636,-0.06121826,-0.05029297,0.010887146,-0.0012588501,-0.007881165,0.0035171509,-0.0012044907,0.032165527,-0.0016222,-0.016723633,-0.0008711815,0.01777649,-0.0012340546,-0.048919678,-0.020706177,-0.054595947,0.0028877258,0.04196167,-0.0018949509,-0.021591187,-0.005252838,-0.013137817,0.019058228,0.017990112,0.0042686462,-0.0042495728,-0.030731201,0.028198242,-0.009178162,0.014907837,0.013801575,0.040740967,0.020645142,0.01184845,0.050994873,0.015365601,-0.021316528,-0.033447266,-0.015419006,-0.062438965,-0.016845703,0.039855957,-0.029418945,-0.0031929016,-0.02267456,-0.0152282715,0.026168823,0.01020813,-0.01789856,0.007457733,0.013618469,-0.0005683899,-0.049072266,-0.07556152,-0.026733398,0.020980835,0.094055176,0.016464233,-0.0034599304,-0.034118652,-0.023025513,0.023239136,-0.009094238,0.04949951,-0.014427185,-0.014404297,-0.018432617,-0.035705566,-0.0012731552,-0.015510559,0.023239136,0.029815674,-0.00390625,0.018203735,0.022140503,0.021606445,-0.026245117,-0.015838623,0.006668091,0.007537842,0.0058517456,-0.008407593,0.06756592,0.0039138794,-0.016433716,-0.0463562,0.020355225,0.0007162094,0.037506104,-0.03643799,0.0033721924,0.002128601,-0.009628296,-0.016937256,-0.018310547,0.009094238,0.009757996,-0.044525146,-0.07727051,0.035217285,-0.020339966,0.016860962,0.015930176,0.0039901733,0.02053833,-0.014007568,0.017349243,-0.016998291,-0.019622803,-0.043548584,-0.028030396,-0.013969421,-0.04309082,-0.0256958,-0.029220581,0.028778076,-0.03060913,0.026412964,-0.013763428,-0.030319214,0.031341553,0.024139404,0.011352539,0.012023926,-0.007820129,0.0012407303,0.031173706,0.0041656494,-0.05038452,0.015975952,0.011695862,0.008132935,0.031402588,0.06274414,-0.0005912781,-0.02470398,0.024932861,-0.0051345825,-0.012252808,-0.035247803,-0.008918762,0.007030487,0.00088882446,-0.011222839,-0.022949219,0.038116455,0.025939941,-0.05142212,-0.0423584,0.034698486,0.03652954,-0.029586792,0.023147583,0.0134887695,0.04559326,-0.035980225,0.032287598,0.0027923584,0.032806396,0.043121338,0.012229919,-0.0054855347,0.0018119812,-0.024597168,-0.0008134842,0.011756897,-0.017303467,0.008125305,0.010910034,0.038085938,0.0008497238,0.00819397,-0.02520752,-0.01737976,-0.0056266785,-0.008857727,-0.011932373,0.04562378,0.013771057,0.01826477,0.001619339,0.023803711,0.030151367,-0.012046814,-0.008552551,-0.0032138824,0.036712646,0.00762558,0.032440186,0.0061073303,0.0022640228,0.018157959,-0.040283203,-0.006893158,0.017562866,0.0014104843,-0.010803223,-0.043518066,-0.026977539,0.008560181,0.031097412,0.01940918,0.013938904,0.008056641,0.006713867,-0.027297974,-0.022277832,0.012886047,0.0181427,-0.044799805,-0.056274414,0.0076828003,0.018188477,0.016113281,-0.016555786,0.028686523,-0.022735596,-0.0025863647,0.012390137,-0.042816162,-0.0035953522,-0.009300232,-0.012924194,0.004283905,-0.0036563873,0.013404846,-0.0112838745,-0.062408447,0.022781372,-0.019973755,0.070373535,-0.035186768,0.033111572,-0.006843567,-0.012306213,0.0030212402,0.027008057,0.023376465,0.038146973,0.025863647,0.035736084,-0.026519775,0.045288086,-0.030944824,0.0154953,-0.009109497,-0.054901123,-0.016235352,-0.02192688,-0.0004749298,0.048431396,-0.035827637,-0.011489868,-0.04458618,-0.04071045,-0.0059318542,-0.040374756,0.024490356,0.035491943,0.046325684,-0.0335083,0.014160156,0.017044067,0.0031852722,-0.0015115738,-0.028518677,-0.007408142,0.018920898,0.014930725,0.021072388,-0.025848389,-0.010314941,0.004005432,0.02571106,-0.018661499,-0.039398193,0.019882202,-0.010719299,-0.023727417,0.026657104,-0.0066566467,-0.021453857,-0.00390625,-0.051361084,-0.018310547,-0.00032138824,0.026000977,0.01725769,-0.006843567,-0.012542725,0.013450623,-0.011688232,0.02519226,-0.016021729,-0.016906738,-0.042938232,-0.0063552856,0.0010643005,0.02734375,0.015823364,-0.031829834,-0.012825012,-0.020553589,-0.056030273,-0.00491333,0.021575928,-0.013557434,0.010513306,-0.020828247,-0.025939941,0.0067443848,-0.016311646,-0.016067505,-0.0011663437,-0.011688232,0.0011205673,-0.0131073,0.010520935,0.043884277,-0.007633209,-0.015716553,-0.00374794,0.009773254,0.01701355,0.04360962,0.017944336,-0.017654419,-0.020446777,0.006122589,0.011383057,0.002948761,-0.040771484,0.010803223,-0.01727295,-0.012374878,0.002954483,0.020950317,-0.020706177,0.02279663,0.055877686,-0.00049972534,0.0040893555,0.011726379,-0.028625488,0.021469116,0.05444336,-0.0076789856,0.005378723,-0.030273438,0.014625549,0.0045166016,0.031677246,0.0019321442,0.033447266,-0.013221741,-0.0099105835,0.0074272156,-0.0074386597,-0.0025177002,-0.0501709,-0.021194458,-0.06726074,-0.003004074,-0.01525116,-0.036590576,0.027877808,0.018630981,-0.009010315,-0.06561279,0.009681702,0.044708252,-0.017547607,0.012023926,-0.0009469986,0.04937744,0.008163452,-0.03164673,-0.017181396,0.007286072,-0.05444336,-0.013023376,-0.03173828,0.03289795,-0.027008057,-0.0072669983,0.014518738,-0.009346008,0.029327393,-0.0085372925,0.029296875,-0.0071754456,0.008361816,-0.026412964,0.0061798096,-0.015289307,-0.034362793,0.051605225,-0.027648926,0.038482666,0.041412354,0.032196045,-0.000037312508,-0.0011100769,0.03262329,-0.027679443,-0.0012788773,0.032836914,0.030761719,0.016601562,-0.0049476624,0.017089844,0.015975952,0.026748657,-0.014724731,-0.00044727325,0.0049438477,-0.030456543,-0.007472992,0.034057617,-0.01751709,-0.0049438477,-0.022033691,0.011444092,0.00021398067,0.002603531,-0.0016040802,-0.030654907,-0.003742218,-0.019943237,0.00381279,0.0051116943,-0.0138549805,-0.0021038055,0.022827148,-0.012306213,0.010566711,0.0115737915,-0.005622864,0.012527466,0.04827881,0.0054855347,-0.006034851,0.008323669,0.012466431,0.026809692,-0.019012451,0.014503479,-0.03741455,-0.004173279,-0.0181427,0.0146865845,-0.008163452,-0.026565552,0.0115356445,-0.01852417,0.00024485588,-0.008644104,-0.03817749,-0.017288208,-0.01838684,-0.015159607,-0.009231567,-0.022506714,-0.0015249252,0.02154541,0.012145996,0.0055160522,-0.026260376,0.04119873,0.0035247803,-0.012771606,0.020401001,0.025665283,-0.008071899,-0.03765869,0.0069084167,0.0000872612,-0.035461426,0.02960205,-0.011619568,0.0013484955,0.031021118,0.0049552917,-0.004016876,0.014839172,0.03817749,-0.02281189,0.00554657,0.015838623,0.028366089,-0.02696228,0.01209259,-0.021484375,0.02798462,-0.0017318726,0.0345459,0.007194519,-0.0079193115,-0.009002686,0.020095825,0.02357483,-0.0062675476,0.036315918,-0.00048017502,0.040740967,-0.02003479,-0.0066833496,-0.012710571,-0.0041046143,-0.0019340515,0.0158844,0.0007133484,0.019165039,-0.00422287,-0.006702423,0.003873825,-0.03427124,0.031463623,0.02192688,0.01586914,-0.03540039,-0.034698486,-0.01713562,0.0004723072,-0.048034668,0.004749298,0.00095558167,0.037841797,0.023483276,0.033355713,0.0009622574,-0.0076828003,0.0047416687,-0.022766113,-0.026931763,-0.0154953,-0.0075035095,0.026245117,-0.0073509216,0.0309906,0.057037354,0.0011825562,0.030838013,0.033325195,0.013404846,0.013221741,0.005039215,-0.025741577,0.02998352,-0.007396698,0.009254456,0.026107788,0.036865234,-0.014793396,0.023971558,-0.0056037903,0.011383057,-0.037994385,0.024017334,0.08294678,0.040283203,0.0068855286,0.04711914,-0.024642944,-0.025024414,-0.0050697327,-0.018478394,0.060150146,-0.013893127,0.0309906,0.041046143,0.010169983,0.0027389526,-0.0023384094,-0.015563965,-0.030349731,0.04522705,0.025512695,0.0019721985,-0.0050811768,-0.020950317,0.004055023,-0.02986145,-0.032958984,-0.00016641617,0.011810303,0.01828003,-0.009628296,0.0009522438,-0.025619507,0.0035552979,0.017623901,-0.010955811,-0.010070801,0.04724121,0.015060425,-0.013648987,0.012649536,-0.017074585,0.032562256,-0.0066566467,-0.016586304,0.016677856,0.019546509,0.0073623657,-0.02267456,0.02255249,-0.01637268,0.025558472,0.03842163,-0.020462036,0.004322052,0.020721436,-0.0020771027,-0.011138916,0.021606445,0.021331787,0.0038928986,0.034423828,0.043518066,0.015380859,-0.029006958,0.021759033,0.0071525574,0.013450623,-0.007183075,-0.0066871643,0.0070495605,-0.023330688,0.012245178,0.005367279,-0.03857422,0.03314209,0.011947632,-0.01109314,-0.0031433105,-0.009902954,0.028656006,-0.02128601,-0.021881104,-0.001168251,0.0022029877,0.026000977,0.036987305,0.037506104,-0.017944336,0.022842407,0.024139404,-0.008613586,-0.008323669,0.012557983,-0.011497498,-0.026062012,-0.00630188,-0.016418457,-0.05618286,0.011199951,-0.006706238,0.005077362,0.020050049,-0.0054092407,-0.02268982,-0.008087158,0.02142334,0.001627922,-0.0063591003,0.016235352,-0.02180481,0.0058937073,0.029907227,-0.011520386,0.0074005127,-0.01939392,-0.008605957,0.0035438538,-0.005874634,-0.037475586,-0.010894775,-0.005748749,-0.03692627,0.0044403076,0.019805908,0.0126953125,0.064819336,-0.0060920715,-0.010627747,-0.00031590462,0.028808594,0.010437012,0.008590698,-0.000289917,-0.0031833649,-0.030883789,0.04272461,0.024368286,-0.0037517548,0.012275696,-0.0039253235,-0.027679443,-0.01285553,0.0018997192,0.023361206,-0.007587433,-0.006538391,0.0050315857,0.037628174,-0.012527466,-0.041809082,-0.003709793,-0.015045166,-0.015380859,-0.03515625,0.016159058,0.0052108765,0.028884888,0.016571045,0.030044556,-0.03475952,0.06500244,-0.023803711,0.035888672,-0.023544312,-0.0035171509,0.048919678,0.02330017,0.039276123,-0.0087509155,0.009063721,-0.013977051,0.009056091,0.0423584,0.012413025,0.037475586,0.0023727417,-0.0154418945,0.032196045,0.0023918152,0.027389526,0.009117126,0.0057373047,0.026855469,-0.007537842,0.00034046173,-0.0087509155,0.004497528,0.012565613,0.017654419,0.0010347366,0.010169983,-0.04196167,0.007041931,0.030090332,0.012710571,0.015419006,0.004650116,-0.017211914,0.023788452,-0.018707275,-0.01966858,-0.015434265,0.004760742,-0.06890869,-0.021102905,0.010910034,0.017486572,-0.017196655,0.06286621,0.0000021457672,0.004547119,0.026519775,0.029006958,-0.0074005127,0.039215088,0.00409317,0.033966064,0.04800415,0.0029029846,-0.015007019,0.03704834,0.005367279,-0.014945984,0.022125244,0.03994751,-0.0044288635,0.028579712,-0.008811951,-0.0043411255,0.008911133,0.002773285,-0.005443573,-0.008392334,-0.011131287,-0.0029315948,-0.0154418945,0.026885986,-0.020141602,-0.018981934,-0.016708374,-0.019134521,-0.0013990402,0.034576416,0.02180481,-0.034088135,0.02507019,-0.0073432922,-0.0019702911,0.0063819885,0.008422852,-0.0060768127,-0.044677734,0.0107421875,0.023422241,-0.008956909,0.035247803,-0.028396606,-0.00592041,0.025482178,0.03942871,0.044403076,0.008293152,-0.008033752,0.019073486,-0.01449585,0.005836487,-0.019821167,-0.009895325,0.013687134,0.016906738,0.016860962,-0.016342163,0.020568848,-0.019638062,0.010093689,-0.003545761,0.014442444,0.024307251,-0.008094788,-0.0035552979,0.014045715,0.03488159,-0.0036678314,-0.031982422,-0.0050964355,0.018447876,0.08319092,0.004650116,0.009803772,0.019851685,0.021316528,0.009681702,0.05014038,0.0055656433,0.022277832,0.010559082,-0.0036525726,-0.010597229,0.03375244,-0.008094788,-0.035125732,0.025009155,-0.040863037,-0.02911377,0.024810791,0.023025513,0.019302368,-0.043060303,-0.0026283264,-0.018188477,-0.044189453,-0.0058135986,-0.0076408386,-0.0032615662,0.0006799698,-0.0075302124,0.021743774,0.000726223,-0.012031555,-0.0075798035,0.0023956299,-0.02331543,-0.05444336,-0.01335144,-0.021026611,0.011688232,-0.045806885,0.0073547363,0.007522583,0.01737976,-0.015136719,0.0016393661,-0.0010108948,0.01600647,0.019836426,0.010940552,0.0072746277,-0.0037841797,-0.03164673,-0.018676758,-0.011940002,-0.005104065,0.03466797,-0.015975952,0.024597168,0.025527954,0.004142761,-0.008239746,-0.004348755,0.0005259514,-0.008651733,-0.01864624,-0.010375977,0.013061523,0.015991211,0.007671356,-0.013198853,0.031143188,-0.011428833,-0.03756714,0.00033712387,0.048950195,0.022872925,0.016036987,-0.008117676,0.014945984,-0.047332764,-0.0015897751,-0.008651733,0.012054443,0.014816284,-0.0031433105,-0.004295349,0.013977051,0.017700195,-0.005016327,-0.000033438206,0.03564453,0.010597229,0.0063972473,0.018737793,-0.00299263,0.008857727,-0.04058838,-0.03277588,0.008628845,0.040405273,0.018173218,0.01020813,-0.018676758,0.0035533905,-0.014518738,-0.007080078,0.0032596588,0.001036644,-0.038360596,-0.014556885,-0.010978699,0.03475952,0.0090408325,0.00052690506,-0.018051147,0.019683838,-0.01361084,-0.028961182,-0.01939392,0.047332764,0.01247406,-0.031982422,-0.011398315,0.014015198,0.00024068356,-0.024673462,-0.008338928,-0.06365967,-0.015548706,-0.00982666,-0.005821228,0.0093688965,0.0056266785,0.008720398,-0.006790161,0.0061416626,-0.0059509277,0.02116394,0.0152282715,-0.020690918,-0.015777588,0.020996094,0.016738892,0.00073099136,0.018875122,0.019973755,-0.012413025,0.0058555603,-0.0073509216,-0.0032081604,-0.042297363,0.013671875,0.010749817,-0.011207581,0.013313293,-0.022750854,0.033447266,0.008087158,0.015403748,-0.013572693,0.004650116,0.02444458,-0.024215698,-0.015670776,-0.0004684925,-0.002916336,-0.033416748,0.013206482,0.020706177,0.019210815,-0.025924683,0.041748047,-0.019363403,-0.01209259,0.011985779,0.01512146,-0.015686035,-0.00554657,0.027114868,-0.003332138,-0.0058403015,-0.004295349,-0.015792847,-0.01121521,-0.030792236,-0.015022278,-0.0087890625,0.009124756,0.036102295,-0.010314941,0.041534424,0.0052604675,0.012069702,0.025314331,0.009864807,0.026473999,-0.000022768974,0.034820557,0.029968262,-0.01449585,0.016021729,-0.0051460266,-0.012756348,0.0003130436,-0.0017681122,0.018157959,-0.0069122314,0.0011663437,0.00083589554,0.00983429,0.013183594,0.0099105835,-0.00068998337,0.011619568,-0.0552063,-0.012634277,-0.026245117,-0.006198883,0.035095215,0.021530151,0.01259613,-0.0019664764,-0.0023727417,0.03164673,0.038604736,-0.012962341,-0.013801575,0.002916336,0.014099121,-0.012512207,0.022994995,-0.0016288757,-0.030075073,-0.011497498,-0.0073890686,-0.01876831,0.020370483,-0.012863159,0.0138549805,-0.0060310364,-0.03186035,-0.037902832,0.011131287,-0.01914978,0.0010528564,0.017852783,-0.0062713623,0.019805908,0.008735657,-0.024154663,0.021881104,0.02154541,-0.024932861,0.028656006,0.032684326,0.0016050339,0.00030970573,0.0016994476,-0.037353516,-0.013671875,0.0065307617,-0.012939453],"createdAt":"2026-04-18T18:52:58.394Z","updatedAt":"2026-04-27T21:34:09.851Z","lastSeenAt":"2026-04-27T21:34:09.851Z","tsv":"'/api/v1/portfolios/5/performance':41 '/request':12,24 '0.02':11,23,62,102 '000':66 '20':65 '402':177 '5':48 '6':70 'access':116 'actual':181 'advertis':107 'ai/ml':91 'analyt':90 'api':87,109,134 'attach':119 'base':8,20,59,67 'broader':78 'call':104 'caller':117,194 'challeng':178 'confirm':172 'connect':143 'contain':168 'content':149 'contract':183 'crawl':132 'data':3,15,32,44,89,94,182,213 'decim':71 'descript':160 'determin':206 'doc':133 'document':127 'endpoint':26,73,170 'exact':208 'exampl':157 'expect':196 'experi':204 'extrem':129 'field':163 'finance/web3':93 'financial performance API' 'gate':86 'header':123 'infer':92 'infrastructur':96 'instant':115 'investment performance' 'json':43,198 'json-api' 'key':110 'limit':113 'live':173 'lowpaymentfee.com':28,80 'method':188 'metric':51 'micropay':6,18 'micropayment' 'need':202 'network':9,21,60 'numer':83 'offer':82 'openapi':153 'outputschema':193 'page':138 'part':75 'payment':36,52,122 'per':63,103 'perform':2,14,31,50,166 'platform':79,106 'portfolio':1,13,30,47,165 'portfolio analytics' 'portfolio returns' 'portfolio tracking' 'portfolio-performance' 'post':187 'post-method' 'price':99,135 'prompt':145 'proper':176 'protocol':37 'provid':29 'rate':112 'readm':137 'relat':45 'request':64,126 'request/response':156 'resourc':40 'respons':167,199 'return':42,140,174,212 'schema':154 'settl':54 'shape':209 'simpli':118 'span':88 'spars':130 'specif':39 'specifi':190 'substant':148 'uniform':100 'unit':68 'unknown':185 'usdc':56 'usdc-base-network' 'util':97 'via':4,16 'wallet':144 'x402':5,17,35,85,121 'x402 finance endpoint' 'x402-gated':84 'x402-payment'","prices":[{"id":"8bea7c94-2b10-4522-b276-da46f02d0dd6","listingId":"52fb5bda-029f-48ee-a350-4d80f8b9127b","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/5/performance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:58.394Z"}],"sources":[{"listingId":"52fb5bda-029f-48ee-a350-4d80f8b9127b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/5/performance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:58.394Z","lastSeenAt":"2026-04-27T21:34:09.851Z"}],"details":{"listingId":"52fb5bda-029f-48ee-a350-4d80f8b9127b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/5/performance \\\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":"Endpoint returns 402 with x402 challenge advertising USDC payment on Base network at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/portfolios/5/performance"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base (6 decimals), so 20000 base units = $0.02","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving performance metrics for a specific investment portfolio","Automated portfolio monitoring by AI agents paying per-request","Integrating portfolio performance data into dashboards or reports"],"bestFor":["Agents needing on-demand portfolio performance data without API key management","Micropayment-based access to financial data on Base network","Developers experimenting with x402 payment protocol for finance APIs"],"notFor":["Users needing detailed API documentation or guaranteed response schemas before integrating","High-frequency trading or latency-sensitive applications (no SLA or rate-limit info available)","Access to arbitrary portfolio IDs (only portfolio 5 is confirmed at this path)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:59.725Z"},"updatedAt":"2026-04-27T21:34:09.851Z"}}