{"id":"45a58343-f7a0-4993-8725-675607351dad","shortId":"yrX6n2","kind":"x402","title":"Portfolio performance data via x402 micropayment on Base network, $0.02 per request.","tagline":"Portfolio performance data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 42) behind an x402 paywall. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals).\n\nThe provider lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. This particular endpoint falls under the finance category and appears to return performance metrics for a portfolio. However, no detailed documentation, request schema, or response schema is available; the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content.\n\nBecause there is no OpenAPI spec, no example request/response payloads, and no documentation beyond the landing page listing, the actual fields accepted or returned by this endpoint are unknown. The x402 challenge is live and well-formed, confirming the endpoint is operational and ready to accept payments.","tags":[],"capabilities":["x402-payment","usdc-base","portfolio-performance","pay-per-call","no-api-key","json-response"],"categories":["finance"],"synonyms":["portfolio performance API","investment performance","portfolio analytics","portfolio returns","financial performance data","x402 finance API"],"warnings":["No OpenAPI spec or schema available for request or response","Documentation pages (docs, pricing, API, README) all render only 'Connect wallet' with no usable content","The specific data returned by this portfolio performance endpoint is unknown","This endpoint targets a hardcoded portfolio ID (42); unclear if other IDs are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/42/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/42/performance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and well-formed with clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation, and no example payloads. The endpoint's actual functionality can only be inferred from its URL path.","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":"2026-04-19T08:36:06.848Z","embedding":[-0.008804321,-0.02470398,0.029556274,0.016525269,0.017532349,-0.020721436,-0.03643799,-0.0031013489,0.080200195,-0.035217285,0.028030396,-0.054748535,-0.023864746,-0.042633057,0.00497818,0.00049877167,0.03289795,-0.0034179688,-0.04067993,0.050964355,0.037597656,-0.02508545,-0.02583313,0.0067825317,-0.0027866364,-0.00020885468,-0.01940918,-0.012641907,-0.01524353,-0.03466797,0.035980225,-0.02128601,-0.015571594,0.003458023,-0.027740479,-0.0087509155,0.009010315,0.022888184,0.029663086,-0.0078048706,-0.013458252,-0.046081543,0.022384644,-0.008049011,-0.03250122,-0.008140564,0.028457642,-0.04473877,0.045440674,0.009239197,-0.037384033,-0.008743286,-0.010848999,0.034118652,0.02420044,0.025512695,0.03012085,0.00034952164,-0.00819397,0.027236938,0.010398865,-0.04940796,0.012336731,-0.00028800964,0.00016891956,0.037017822,-0.021392822,0.0625,-0.009986877,0.078063965,0.025299072,0.037353516,0.02885437,0.023239136,-0.00919342,-0.018066406,-0.011940002,0.03149414,0.005722046,-0.03540039,-0.0011463165,0.0032806396,-0.06097412,-0.0075302124,-0.018234253,-0.044921875,-0.019165039,-0.002494812,-0.03213501,0.042785645,-0.08514404,0.006755829,-0.0076560974,0.017318726,-0.002199173,-0.0076675415,-0.004005432,0.012809753,0.010612488,0.02734375,0.009132385,-0.032318115,-0.00026130676,0.017913818,0.031097412,0.04144287,0.0066223145,0.04623413,-0.0010757446,-0.021438599,-0.054382324,-0.004497528,-0.0049591064,0.013793945,0.012054443,-0.0074768066,-0.015960693,0.015625,-0.023223877,0.009269714,-0.06451416,0.029083252,0.026763916,-0.0028591156,0.02192688,-0.049102783,-0.014862061,0.004470825,-0.03970337,-0.037628174,0.021942139,0.0071792603,0.008483887,-0.015586853,-0.026992798,0.015213013,-0.019515991,-0.040252686,-0.0519104,-0.03164673,0.038604736,-0.03488159,0.037963867,0.009635925,-0.0793457,0.02558899,-0.010757446,0.014450073,-0.0038928986,-0.021560669,0.015174866,0.031173706,-0.01586914,0.007801056,-0.0043563843,-0.02848816,-0.010673523,0.00907135,0.004558563,0.030853271,0.0018396378,0.027557373,-0.008621216,0.0040779114,0.02406311,0.025634766,-0.008903503,-0.056274414,-0.07861328,-0.016296387,0.011375427,-0.022369385,-0.0025463104,-0.011940002,-0.0021858215,-0.07086182,-0.0058021545,-0.025253296,0.010154724,-0.057861328,-0.033172607,-0.031204224,0.02420044,-0.004524231,-0.06286621,0.026351929,-0.005962372,0.06384277,0.024093628,0.03829956,0.04421997,0.0041656494,0.05267334,0.031677246,-0.04537964,-0.019134521,0.008033752,-0.01852417,-0.003145218,0.007865906,0.010971069,-0.024124146,0.055114746,0.056488037,0.009376526,-0.017440796,-0.0011425018,-0.06854248,-0.024353027,-0.0013780594,0.033325195,0.023498535,0.0015697479,0.013137817,-0.017074585,-0.02973938,0.013076782,0.024261475,0.01348114,0.0602417,0.013793945,0.040039062,0.029403687,-0.0036754608,-0.029953003,0.04220581,0.029006958,0.00374794,0.0009946823,-0.06567383,0.030410767,0.010368347,-0.026916504,0.009010315,0.0069770813,0.0146865845,-0.02935791,-0.014541626,0.0034389496,-0.02973938,0.008270264,-0.01689148,-0.002117157,0.017028809,0.017059326,-0.0052757263,-0.035949707,-0.086364746,0.020706177,0.0051498413,0.029830933,0.0060806274,-0.014923096,-0.021881104,0.011184692,-0.046875,0.021636963,0.057861328,-0.0059318542,-0.020431519,0.011428833,-0.020690918,-0.027770996,-0.0071525574,-0.025100708,-0.029190063,-0.03427124,-0.0063095093,-0.05996704,0.02684021,0.02520752,0.05114746,0.02961731,-0.020263672,-0.051971436,-0.0011987686,-0.028579712,0.00831604,-0.04473877,-0.019744873,0.004463196,0.010650635,-0.017593384,0.03012085,0.013938904,0.0020713806,0.005584717,0.01524353,-0.010040283,0.008773804,-0.019515991,0.009284973,0.02520752,-0.05114746,0.00422287,-0.008110046,0.046661377,-0.029190063,0.028640747,-0.0046958923,0.026229858,0.05038452,-0.01637268,-0.05355835,0.013954163,0.005428314,0.010223389,0.034301758,-0.015533447,-0.019088745,-0.028533936,0.059661865,-0.014518738,0.0030765533,0.012962341,0.017181396,0.033355713,-0.01600647,-0.02671814,-0.049591064,-0.0099105835,-0.032806396,0.020858765,-0.0049552917,0.0368042,-0.0036811829,0.016433716,-0.0044441223,-0.01600647,-0.022918701,-0.004962921,-0.02609253,0.0066833496,-0.00472641,-0.010429382,0.020263672,0.006702423,-0.0032749176,0.021057129,0.019958496,0.00995636,-0.008880615,-0.022735596,-0.022491455,0.0042419434,-0.03555298,0.027709961,0.046691895,0.0151901245,0.019241333,-0.01612854,-0.012466431,0.03149414,0.012672424,0.025177002,-0.011123657,-0.000093340874,-0.056549072,-0.08557129,-0.026443481,-0.017456055,0.020141602,0.036621094,0.00491333,0.042022705,0.02558899,-0.01687622,-0.05758667,0.031341553,-0.05670166,0.00680542,0.041625977,-0.01927185,-0.018157959,-0.0149002075,0.00011998415,0.0129470825,0.057861328,0.023345947,0.0063934326,0.041015625,0.02116394,0.010765076,-0.01512146,0.023223877,0.032592773,0.0070495605,-0.0020103455,-0.04800415,0.008514404,0.010505676,-0.024765015,-0.04260254,-0.08514404,0.032318115,0.04650879,0.06768799,0.034576416,0.028533936,0.0029182434,-0.050689697,-0.0041007996,-0.043762207,-0.003080368,-0.03604126,-0.055755615,0.026351929,0.004219055,0.022644043,-0.020645142,0.025558472,-0.03427124,0.00843811,-0.022659302,0.06439209,-0.016830444,0.007522583,0.021392822,0.007850647,0.0491333,0.06011963,-0.032928467,0.045440674,0.021652222,-0.028320312,0.009300232,0.05230713,-0.023971558,-0.012184143,-0.061920166,-0.050689697,0.013084412,-0.007484436,-0.008758545,-0.013191223,-0.0051651,0.0335083,0.010643005,-0.026000977,-0.0087890625,0.013282776,0.0015735626,-0.05230713,-0.00038433075,-0.043182373,-0.001958847,0.040283203,0.0007677078,-0.020553589,-0.0023288727,-0.012687683,0.012397766,0.038604736,0.015098572,0.00008523464,-0.03756714,0.02659607,-0.00014352798,0.0074882507,0.023712158,0.03829956,0.017974854,0.028686523,0.04812622,0.024673462,-0.01751709,-0.04626465,0.0019483566,-0.052246094,-0.0054016113,0.038909912,-0.025283813,-0.0018463135,-0.02998352,-0.020858765,0.009391785,0.017364502,-0.03189087,-0.008613586,0.015930176,-0.0020599365,-0.050964355,-0.07287598,-0.03363037,0.011619568,0.08166504,0.031341553,-0.004463196,-0.03717041,-0.018356323,0.027297974,-0.0024032593,0.051086426,-0.0152282715,-0.019836426,-0.013710022,-0.04147339,-0.004058838,-0.010543823,0.020950317,0.0149383545,-0.011856079,0.019699097,0.023605347,0.014755249,-0.015533447,-0.0051345825,0.0023384094,-0.002046585,0.009727478,-0.013412476,0.07092285,-0.0017385483,-0.014923096,-0.05215454,0.026748657,0.0061531067,0.034179688,-0.026107788,-0.009490967,-0.0028266907,-0.0035305023,-0.019683838,-0.019897461,0.018875122,0.00724411,-0.048583984,-0.07879639,0.039154053,-0.020050049,0.016159058,0.022216797,0.0025787354,0.013435364,-0.017562866,0.019012451,-0.009124756,-0.016174316,-0.034362793,-0.032684326,-0.021530151,-0.043060303,-0.028640747,-0.029510498,0.025863647,-0.026245117,0.025863647,-0.012809753,-0.028060913,0.025177002,0.01739502,0.008163452,0.019897461,-0.011421204,0.0035209656,0.03955078,-0.000069737434,-0.052337646,0.02067566,0.0129776,0.00060224533,0.027999878,0.054595947,0.013092041,-0.018707275,0.012207031,-0.001704216,-0.019760132,-0.048339844,-0.0023498535,-0.0019721985,0.0065994263,-0.019073486,-0.03173828,0.0368042,0.025253296,-0.049468994,-0.0435791,0.024642944,0.02494812,-0.02861023,0.029373169,0.004085541,0.042785645,-0.03012085,0.027450562,-0.0000962615,0.023147583,0.0340271,0.013153076,-0.008377075,-0.002538681,-0.02003479,-0.0026855469,0.01322937,-0.014373779,0.012252808,0.0078125,0.037597656,-0.0021419525,0.0112838745,-0.017974854,-0.025421143,0.00522995,-0.010574341,-0.017684937,0.036315918,0.01828003,0.013954163,0.003824234,0.016281128,0.023788452,-0.00687027,-0.0043640137,-0.011886597,0.039001465,0.0028591156,0.018203735,0.007587433,0.015007019,0.023712158,-0.047668457,-0.0033493042,0.02015686,0.0006866455,-0.024108887,-0.05343628,-0.028457642,0.008033752,0.03466797,0.020050049,0.014190674,0.016448975,0.0023021698,-0.01550293,-0.015991211,0.015007019,0.00223732,-0.04748535,-0.058013916,0.0028686523,0.011367798,0.0154953,-0.02168274,0.013053894,-0.019989014,-0.015914917,0.007980347,-0.04055786,-0.0011491776,0.0030651093,-0.0004107952,0.010612488,0.0057792664,0.013793945,-0.014053345,-0.055114746,0.020645142,-0.019714355,0.06945801,-0.047332764,0.024093628,-0.009635925,-0.005630493,0.006175995,0.029373169,0.014518738,0.036895752,0.022735596,0.030517578,-0.03930664,0.04937744,-0.02671814,0.012008667,-0.013175964,-0.059326172,-0.01184082,-0.027023315,-0.0070610046,0.045440674,-0.030563354,-0.00856781,-0.038391113,-0.032806396,-0.013580322,-0.04660034,0.022949219,0.035247803,0.046875,-0.02835083,0.013320923,0.0038394928,0.0070610046,-0.011077881,-0.025772095,-0.0033130646,0.019851685,0.0077056885,0.022644043,-0.034210205,-0.010940552,-0.0016403198,0.024520874,-0.025802612,-0.03842163,0.00919342,-0.00028443336,-0.0098724365,0.03253174,-0.0070610046,-0.014030457,-0.005683899,-0.05230713,-0.009605408,-0.003955841,0.019012451,0.014144897,-0.006084442,-0.0138549805,0.010795593,-0.014808655,0.037475586,-0.00856781,-0.026916504,-0.046905518,0.008491516,0.0034809113,0.028747559,0.009483337,-0.027908325,-0.006099701,-0.027633667,-0.05633545,-0.014122009,0.019454956,-0.025375366,0.009109497,-0.0143585205,-0.032562256,0.0044555664,-0.026794434,-0.019622803,0.007896423,-0.01058197,0.003118515,-0.014717102,0.019760132,0.04083252,-0.007041931,-0.019439697,0.00057411194,0.010643005,0.01335144,0.033599854,0.019104004,-0.018936157,-0.021499634,0.012107849,0.012313843,-0.0038375854,-0.035369873,0.009262085,-0.008979797,-0.011009216,0.002691269,0.010154724,-0.0146484375,0.019485474,0.07550049,0.0018167496,0.010345459,-0.002948761,-0.030166626,0.01953125,0.047454834,-0.0143966675,0.005355835,-0.029846191,0.013511658,0.0008997917,0.028427124,0.012870789,0.030303955,-0.011138916,-0.00920105,-0.0073242188,-0.0035762787,0.00504303,-0.054748535,-0.016448975,-0.071777344,-0.002204895,-0.01524353,-0.04522705,0.018295288,0.01927185,-0.013267517,-0.06842041,0.002286911,0.04510498,-0.013961792,0.014198303,0.010375977,0.05480957,0.005458832,-0.025390625,0.0013256073,0.015716553,-0.043182373,-0.018295288,-0.032287598,0.029724121,-0.023880005,-0.007949829,0.013954163,-0.011955261,0.0236969,-0.006038666,0.028457642,-0.027420044,0.02758789,-0.033081055,0.0022659302,-0.010070801,-0.021194458,0.05517578,-0.03717041,0.038238525,0.037078857,0.024353027,0.0024147034,-0.0022888184,0.037963867,-0.03918457,0.0033950806,0.034729004,0.033691406,0.029251099,-0.008659363,0.010604858,0.029586792,0.016983032,-0.011375427,-0.0028362274,-0.009521484,-0.035339355,-0.019882202,0.027954102,-0.023452759,-0.0033473969,-0.026260376,0.0008401871,0.007461548,0.007881165,0.018112183,-0.020431519,-0.0044898987,-0.033935547,0.0016775131,-0.0070610046,-0.008560181,-0.010620117,0.027740479,-0.00831604,0.019744873,0.005367279,0.00042271614,0.01838684,0.03918457,0.0016498566,-0.005935669,0.018371582,0.0019006729,0.024871826,-0.008613586,0.0076560974,-0.04269409,-0.0045433044,-0.022872925,0.01914978,-0.0007252693,-0.02911377,0.0056915283,-0.011054993,0.00078582764,-0.0104904175,-0.038726807,-0.019226074,-0.017959595,-0.01586914,-0.010948181,-0.020263672,0.015319824,0.012237549,0.00573349,0.006702423,-0.022369385,0.03729248,0.0055999756,-0.005367279,0.016921997,0.024032593,-0.007171631,-0.031555176,0.0028495789,-0.00969696,-0.02722168,0.024734497,-0.021987915,-0.002483368,0.028503418,0.009750366,-0.007331848,0.011756897,0.029953003,-0.019088745,0.010757446,0.012542725,0.022201538,-0.023956299,0.019302368,-0.038726807,0.029937744,0.008712769,0.029647827,0.011871338,-0.014533997,-0.020904541,0.018707275,0.025390625,-0.008277893,0.045043945,0.009132385,0.040863037,-0.010147095,-0.012069702,-0.010772705,-0.009483337,-0.00060892105,0.02067566,0.0032367706,0.02319336,-0.0030975342,0.0023670197,0.013061523,-0.036590576,0.028793335,0.018707275,0.012161255,-0.035949707,-0.03729248,-0.01876831,0.006881714,-0.04562378,0.008087158,0.00749588,0.04486084,0.029541016,0.0357666,0.0035762787,0.0042419434,0.0017318726,-0.028778076,-0.025375366,-0.020904541,-0.010848999,0.018600464,-0.0077209473,0.03564453,0.05496216,-0.006576538,0.031402588,0.033416748,0.008926392,0.018600464,0.012207031,-0.024475098,0.024398804,-0.0042304993,0.015625,0.023925781,0.041107178,-0.009361267,0.029693604,-0.003124237,0.022354126,-0.035308838,0.022537231,0.08569336,0.032958984,-0.003271103,0.05126953,-0.017791748,-0.028717041,-0.010360718,-0.018203735,0.048065186,-0.006580353,0.034698486,0.041809082,0.0181427,-0.0027484894,-0.008171082,-0.020812988,-0.031219482,0.045654297,0.030029297,0.0018224716,-0.005844116,-0.03111267,0.010826111,-0.023208618,-0.03250122,0.0029335022,0.0047073364,0.013008118,-0.008674622,-0.008163452,-0.021148682,-0.0027885437,0.023223877,-0.0044021606,-0.017166138,0.0463562,0.022277832,-0.0012645721,0.013305664,-0.009757996,0.028320312,-0.0146484375,-0.01448822,0.012573242,0.014282227,0.0070724487,-0.031036377,0.022659302,-0.0070877075,0.028213501,0.05142212,-0.013702393,0.0054473877,0.01878357,-0.010314941,-0.0033416748,0.047912598,0.017242432,0.012664795,0.039276123,0.035705566,0.018920898,-0.033294678,0.016159058,0.0058517456,0.021057129,-0.012359619,-0.0019569397,0.006046295,-0.029266357,0.015403748,-0.009056091,-0.037200928,0.034240723,0.019104004,-0.011390686,-0.0054473877,-0.005836487,0.023712158,-0.024307251,-0.019210815,0.0019893646,-0.00064468384,0.025726318,0.03475952,0.040649414,-0.006351471,0.024642944,0.02684021,-0.02178955,-0.010261536,0.01902771,-0.0181427,-0.0062217712,-0.005153656,-0.008804321,-0.05218506,0.013542175,0.0024909973,0.011077881,0.023468018,-0.004207611,-0.016845703,-0.0050811768,0.015312195,0.0033550262,0.00087833405,0.011558533,-0.016555786,0.010902405,0.033691406,-0.020202637,0.006149292,-0.016067505,-0.011116028,-0.0016527176,-0.0059814453,-0.03656006,-0.0058631897,-0.00944519,-0.030166626,0.00111866,0.020599365,0.011123657,0.062805176,-0.009857178,-0.01826477,0.0042648315,0.037139893,0.0066986084,0.00060224533,-0.0072517395,0.006160736,-0.021881104,0.042999268,0.01977539,0.0014343262,0.025482178,0.0020923615,-0.018310547,-0.008773804,0.007297516,0.019241333,-0.014427185,-0.0062065125,0.0077056885,0.036010742,-0.0178833,-0.04425049,-0.0026817322,-0.014633179,-0.022888184,-0.039367676,0.010848999,0.00466156,0.023498535,0.016296387,0.027709961,-0.029769897,0.06549072,-0.021240234,0.043792725,-0.030380249,-0.0048179626,0.05038452,0.020599365,0.028930664,0.0010251999,0.007980347,-0.02557373,0.01676941,0.03302002,0.019363403,0.030059814,0.0015296936,-0.00969696,0.021697998,-0.009994507,0.029769897,0.0014390945,0.0057144165,0.026245117,-0.0121154785,-0.0030117035,-0.0087509155,0.0020198822,0.012161255,0.022583008,-0.010787964,0.019622803,-0.03466797,0.001996994,0.02684021,0.006340027,0.0158844,0.0071983337,-0.012214661,0.022598267,-0.021072388,-0.02192688,-0.010772705,0.0067977905,-0.072387695,-0.021591187,0.012893677,0.012321472,-0.011505127,0.058166504,0.0053634644,0.0070724487,0.027450562,0.030715942,-0.011787415,0.033447266,0.0032310486,0.039123535,0.04550171,-0.004825592,-0.020736694,0.026412964,0.004333496,-0.010047913,0.025985718,0.04815674,-0.0053367615,0.02911377,0.0018196106,0.0035114288,0.0024414062,0.0010128021,-0.005809784,-0.0036258698,-0.01802063,-0.015296936,-0.010017395,0.022506714,-0.020767212,-0.0138549805,-0.024932861,-0.017349243,0.0017623901,0.041046143,0.020736694,-0.03842163,0.013557434,-0.006828308,0.0024814606,-0.008110046,-0.0066184998,-0.008087158,-0.047088623,0.011428833,0.01637268,-0.0074691772,0.03881836,-0.035827637,-0.0010223389,0.032562256,0.024017334,0.038757324,-0.003643036,-0.006160736,0.018753052,-0.009971619,0.009849548,-0.0155181885,-0.015350342,0.017974854,0.00982666,0.015068054,-0.02015686,0.032104492,-0.025665283,0.017318726,-0.0026607513,0.01499176,0.025848389,-0.009414673,-0.0028324127,0.021972656,0.0390625,-0.012916565,-0.029327393,-0.0046463013,0.02947998,0.077697754,0.0066070557,0.007701874,0.022476196,0.028030396,0.012687683,0.051574707,0.013282776,0.030029297,0.014663696,-0.009552002,-0.011047363,0.036590576,-0.011894226,-0.021636963,0.030426025,-0.040039062,-0.030807495,0.019607544,0.018539429,0.009689331,-0.038391113,-0.002483368,-0.021133423,-0.03994751,-0.000323534,-0.012161255,-0.0041923523,-0.0026893616,0.004688263,0.016082764,0.0031490326,-0.023590088,-0.008018494,0.002916336,-0.026062012,-0.058380127,-0.010696411,-0.021957397,0.009742737,-0.03451538,0.0032138824,-0.00073719025,0.01965332,-0.01473999,0.0025482178,-0.0042152405,0.01033783,0.029159546,0.011955261,0.014450073,-0.01473999,-0.020629883,-0.019821167,-0.00617218,-0.0003736019,0.035736084,-0.022766113,0.025344849,0.027023315,-0.003534317,-0.0061302185,0.00087594986,-0.008331299,-0.005756378,-0.022872925,-0.018295288,0.018508911,0.014808655,0.002855301,-0.021011353,0.030517578,-0.01689148,-0.01979065,0.014923096,0.051696777,0.020248413,0.012969971,-0.012039185,0.0028305054,-0.042053223,0.002603531,-0.009719849,0.010559082,0.019821167,-0.0042304993,-0.0026721954,0.022537231,0.016738892,-0.010406494,0.0024375916,0.04663086,0.00064086914,0.008453369,0.021560669,-0.0009889603,0.003364563,-0.035827637,-0.024993896,0.011421204,0.04598999,0.017684937,0.008018494,-0.018188477,0.0004746914,-0.002067566,-0.005054474,0.007411957,-0.011726379,-0.05105591,-0.015060425,-0.0128479,0.03491211,0.0023384094,0.0028514862,-0.012870789,0.012260437,-0.0065612793,-0.031341553,-0.023010254,0.046966553,0.014137268,-0.024673462,-0.01713562,0.0134887695,0.0018377304,-0.024276733,-0.0008263588,-0.061065674,-0.02116394,-0.0013370514,-0.012687683,0.013595581,-0.0000371933,0.009994507,-0.0099105835,0.0063552856,-0.00674057,0.018615723,0.013885498,-0.009529114,-0.01083374,0.025558472,0.0128479,-0.0004646778,0.017684937,0.014633179,-0.00687027,0.0061416626,-0.0018959045,-0.0032310486,-0.03845215,0.019729614,0.008293152,-0.0013828278,0.021469116,-0.025985718,0.028900146,-0.006198883,0.017715454,-0.016311646,-0.0028209686,0.020858765,-0.02281189,-0.015991211,-0.0032920837,-0.014335632,-0.033813477,0.0057258606,0.016296387,0.024414062,-0.033050537,0.04067993,-0.021072388,-0.012496948,0.010314941,0.015960693,-0.014030457,-0.00017440319,0.02658081,0.0020122528,-0.006336212,-0.004295349,-0.016433716,-0.022140503,-0.029586792,0.000086545944,-0.011695862,0.010910034,0.039215088,0.0008711815,0.042755127,0.0069503784,0.015335083,0.020950317,-0.0015678406,0.024795532,0.0027198792,0.039611816,0.018615723,-0.021591187,0.011581421,-0.0024280548,-0.023376465,0.0018310547,-0.0025157928,0.013290405,-0.015068054,0.002084732,0.005859375,0.015060425,0.013648987,0.016937256,-0.008888245,0.017868042,-0.046875,-0.023147583,-0.022079468,-0.0056037903,0.03024292,0.0154418945,0.015716553,-0.0024909973,-0.0037441254,0.019638062,0.03579712,-0.016235352,-0.008766174,-0.014251709,0.012359619,-0.0076065063,0.019744873,0.0048942566,-0.025115967,-0.010261536,-0.002412796,-0.02067566,0.020751953,-0.004840851,0.0087509155,-0.010627747,-0.012863159,-0.035064697,0.0072250366,-0.020462036,-0.0037288666,0.02482605,0.001121521,0.017501831,0.009796143,-0.033935547,0.013130188,0.025146484,-0.03289795,0.028427124,0.03012085,0.0061035156,-0.0036811829,0.0026626587,-0.041870117,-0.017028809,0.0035800934,-0.0044403076],"createdAt":"2026-04-18T18:52:54.246Z","updatedAt":"2026-04-28T10:33:48.426Z","lastSeenAt":"2026-04-28T10:33:48.426Z","tsv":"'0.02':10,22,66,101 '000':70 '0x8335':60 '20':69 '2913':61 '42':38 '6':74 'accept':44,180,205 'actual':178 'ai/ml':92 'analyt':91 'api':88,106,146 'appear':123 'avail':141 'base':8,20,55,71 'behind':39 'beyond':172 'broad':81 'call':87 'catalog':82 'categori':121 'challeng':190 'commit':113 'confirm':197 'connect':152 'content':158 'contract':59 'cost':64 'data':3,15,32,90 'decim':75 'detail':133 'doc':143 'document':134,171 'endpoint':26,116,185,199 'exampl':166 'fall':117 'field':179 'financ':120 'finance/web3':94 'financial performance data' 'form':196 'host':79 'howev':131 'id':37 'infer':93 'infrastructur':96 'investment performance' 'json':49 'json-response' 'key':107 'land':174 'limit':110 'list':176 'live':192 'lowpaymentfee.com':28,78 'metric':127 'micropay':6,18 'network':9,21,56 'no-api-key' 'openapi':163 'oper':201 'page':147,175 'particular':115 'pay':85 'pay-per-cal':84 'pay-per-call' 'payload':168 'payment':50,206 'paywal':42 'per':11,23,67,86,102 'perform':2,14,31,126 'portfolio':1,13,30,36,130 'portfolio analytics' 'portfolio performance API' 'portfolio returns' 'portfolio-performance' 'post':45 'price':99,144 'prompt':154 'provid':29,77 'rate':109 'readi':203 'render':149 'request':12,24,46,68,103,135 'request/response':167 'respons':138 'return':48,125,182 'schema':136,139 'settl':52 'span':89 'spec':164 'specif':35 'unit':72 'unknown':187 'usdc':58 'usdc-base' 'use':57 'util':97 'via':4,16 'wallet':153 'well':195 'well-form':194 'x402':5,17,41,189 'x402 finance API' 'x402-payment'","prices":[{"id":"1b048287-abe4-4060-adb8-37a201b6c4ba","listingId":"45a58343-f7a0-4993-8725-675607351dad","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/42/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":"2026-04-18T18:52:54.246Z"}],"sources":[{"listingId":"45a58343-f7a0-4993-8725-675607351dad","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/42/performance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:54.246Z","lastSeenAt":"2026-04-28T10:33:48.426Z"}],"details":{"listingId":"45a58343-f7a0-4993-8725-675607351dad","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/42/performance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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 on Base at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/portfolios/42/performance"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/portfolios/42/performance"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving performance metrics for a tracked portfolio","Integrating portfolio performance data into dashboards or agents","Programmatic access to portfolio returns without API key management"],"bestFor":["Agents or apps needing on-demand portfolio performance data with crypto micropayments","Developers who want keyless, pay-per-call access to financial data","Base network USDC holders looking for frictionless API access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Bulk/high-volume consumers who need subscription-based pricing","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:59.938Z"},"updatedAt":"2026-04-28T10:33:48.426Z"}}