{"id":"f497fead-77d9-44e1-aea4-64518a02a147","shortId":"akQ354","kind":"x402","title":"Retrieve portfolio holdings data via x402 micropayment on Base network for $0.02/request.","tagline":"Retrieve portfolio holdings data via x402 micropayment on Base network for $0.02/request.","description":"This endpoint at lowpaymentfee.com returns holdings data for portfolio #86 via a POST request, gated behind an x402 payment challenge. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/portfolios/86/holdings` appears to be a finance-related resource that returns portfolio holdings information in JSON format. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof for 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the specified payTo address on Base. No API keys, rate limits, or subscriptions are required — each call is independently paid.\n\nDocumentation on the site is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data returned after successful payment is unknown from the available material.","tags":[],"capabilities":["x402-payment","usdc-base","portfolio-holdings","pay-per-request","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["portfolio holdings API","investment holdings","x402 finance API","Base USDC micropayment API","lowpaymentfee portfolio","crypto pay-per-call API","portfolio data endpoint"],"warnings":["No API documentation available — docs, pricing, README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The endpoint is scoped to a single hardcoded portfolio ID (86) with no explanation of what this portfolio contains","Actual response format after successful payment is completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/86/holdings","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/86/holdings","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 with clear pricing. However, there is no documentation, no request/response schema, no examples, and the docs pages are empty. The purpose of 'portfolio 86 holdings' is unexplained. 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":"2026-04-19T09:01:28.894Z","embedding":[-0.02406311,-0.013595581,0.029327393,0.016204834,-0.0063972473,-0.015090942,-0.02357483,0.014190674,0.059570312,-0.06311035,0.02986145,-0.043151855,-0.017425537,-0.05432129,0.0038471222,0.004207611,0.0008659363,-0.0054130554,-0.068115234,0.04434204,0.039215088,-0.01473999,-0.006160736,0.028411865,-0.015167236,0.0060920715,-0.010414124,-0.020309448,-0.021591187,-0.030044556,0.042388916,-0.02923584,-0.003534317,0.023452759,-0.023025513,0.0015907288,0.0044136047,0.033813477,0.033813477,0.004634857,0.019805908,-0.054473877,0.02746582,-0.010292053,-0.029708862,-0.008255005,0.045806885,-0.04699707,0.029815674,0.010650635,-0.03543091,0.0026988983,-0.009727478,0.014663696,0.0067710876,0.01727295,0.025405884,0.006072998,-0.015533447,0.029815674,0.0053863525,-0.048034668,0.015991211,0.0023002625,0.0013399124,0.033843994,-0.024398804,0.066345215,0.0065193176,0.06359863,0.023345947,0.045715332,0.0074424744,0.0039634705,-0.014801025,-0.03567505,-0.01109314,0.021652222,0.0039253235,-0.0345459,-0.009635925,0.0009293556,-0.06341553,-0.010047913,-0.03527832,-0.047210693,-0.015625,0.007297516,-0.061767578,0.047210693,-0.066467285,0.014854431,0.005458832,0.0038089752,0.0058670044,-0.05581665,0.005760193,0.029296875,-0.0068855286,0.022964478,0.005340576,-0.034118652,-0.0024204254,-0.0037727356,0.0259552,0.054901123,0.009490967,0.043945312,0.006336212,-0.0067825317,-0.05758667,0.0003273487,0.012062073,0.027267456,0.011489868,-0.0054092407,-0.04034424,0.0018472672,-0.035339355,0.023025513,-0.05630493,0.01524353,0.022918701,0.0011425018,0.017990112,-0.03186035,-0.021621704,0.016067505,-0.033477783,-0.02394104,0.032104492,0.0109939575,0.0069007874,-0.014556885,-0.024597168,0.008460999,-0.020584106,-0.025894165,-0.039489746,-0.01234436,0.020553589,-0.04397583,0.040985107,0.0063705444,-0.09442139,0.02192688,-0.011177063,0.017852783,0.005382538,-0.007511139,0.020370483,0.025054932,-0.006011963,-0.0049705505,-0.0006785393,-0.03439331,-0.015129089,0.035614014,-0.008659363,0.023025513,-0.0004067421,0.02444458,-0.012886047,0.006084442,0.029342651,0.041870117,0.0036354065,-0.06530762,-0.07220459,-0.03805542,0.014282227,-0.0006928444,-0.0107803345,-0.008728027,-0.023666382,-0.05026245,0.017623901,-0.018188477,-0.0018053055,-0.06964111,-0.006526947,-0.028900146,0.020858765,-0.005443573,-0.0803833,0.0075645447,-0.013748169,0.04724121,0.018814087,0.014533997,0.03152466,0.016235352,0.050598145,0.050811768,-0.019805908,-0.023849487,0.0045394897,0.004360199,0.015296936,-0.0050086975,0.010108948,-0.011123657,0.024902344,0.053649902,-0.009376526,-0.021102905,0.013908386,-0.051330566,-0.043945312,-0.015670776,0.035461426,-0.0012483597,-0.023712158,0.0138168335,-0.015129089,-0.028152466,0.0037460327,0.0335083,0.0035896301,0.04437256,0.009933472,0.042175293,0.04638672,0.018096924,-0.024276733,0.04928589,0.033477783,0.0065307617,0.016342163,-0.051818848,0.026046753,0.0053749084,-0.013412476,-0.0022792816,0.0056610107,0.023101807,-0.03213501,-0.00957489,0.0019321442,-0.00617218,0.014282227,-0.017974854,-0.0032138824,0.011184692,0.0107421875,-0.013031006,-0.029190063,-0.08331299,0.035003662,0.031036377,0.034362793,-0.0003979206,-0.020950317,-0.01713562,-0.013298035,-0.029556274,0.0014276505,0.074645996,-0.020751953,-0.008056641,0.013549805,-0.029510498,-0.043945312,-0.010444641,-0.015731812,-0.017700195,-0.020309448,-0.0056915283,-0.06591797,0.011444092,0.009033203,0.040405273,0.018173218,-0.018569946,-0.054016113,0.008392334,-0.021224976,0.010101318,-0.05026245,0.004322052,0.0077934265,0.03366089,-0.013641357,0.016021729,0.025939941,0.004535675,0.026367188,0.006580353,-0.0027065277,0.013671875,0.003118515,0.009262085,0.0340271,-0.04837036,0.007270813,-0.014022827,0.046875,-0.037231445,0.02078247,-0.026565552,0.028457642,0.033416748,-0.016860962,-0.08087158,0.021835327,-0.011772156,0.0107803345,0.043304443,-0.014846802,-0.012832642,-0.037475586,0.0541687,-0.031463623,-0.0038967133,0.00070238113,0.030700684,0.025405884,-0.008300781,-0.035461426,-0.03704834,-0.0047187805,-0.018569946,0.034729004,-0.00484848,0.019302368,-0.013198853,0.020507812,-0.019119263,-0.0073623657,-0.028457642,-0.006866455,-0.012535095,-0.017547607,-0.0021705627,-0.023788452,0.005645752,-0.008590698,0.008476257,0.026748657,0.00995636,0.018157959,0.0071525574,-0.024276733,-0.02986145,-0.0074424744,-0.035064697,0.022354126,0.043273926,-0.0077552795,0.027862549,-0.011199951,0.0016088486,0.014907837,0.013381958,0.024139404,-0.004207611,-0.019866943,-0.04953003,-0.077819824,-0.019073486,-0.024642944,0.01637268,0.014907837,0.009307861,0.050598145,0.012168884,-0.028152466,-0.060791016,0.03778076,-0.041992188,0.016220093,0.04525757,-0.016464233,-0.015853882,0.011619568,0.008865356,0.012390137,0.032104492,0.016433716,0.010925293,0.033966064,0.007041931,0.005832672,0.008003235,0.01424408,0.016738892,-0.018966675,-0.013305664,-0.041778564,0.003917694,0.021194458,-0.008834839,-0.041503906,-0.07092285,0.025543213,0.015258789,0.049957275,0.022277832,0.01713562,0.008796692,-0.040130615,-0.020111084,-0.049041748,-0.0042762756,-0.03137207,-0.050598145,0.01727295,-0.00093507767,0.024765015,-0.015144348,0.031341553,-0.018661499,0.0231781,-0.038848877,0.058135986,-0.020309448,-0.008460999,0.021270752,-0.00039577484,0.044525146,0.057861328,-0.03427124,0.032684326,0.025146484,-0.027313232,0.0033721924,0.064453125,-0.026687622,-0.013504028,-0.061309814,-0.048736572,-0.0010871887,-0.0057907104,-0.007926941,0.003118515,-0.019424438,0.038604736,0.014152527,-0.031799316,-0.014297485,0.027282715,0.0102005005,-0.068115234,-0.010009766,-0.03366089,0.020614624,0.040618896,-0.006591797,-0.031219482,0.010360718,-0.026107788,0.009552002,0.039520264,0.02015686,0.0052757263,-0.022079468,0.023483276,-0.009124756,0.0087890625,0.014503479,0.04522705,0.026763916,0.005771637,0.058898926,0.04019165,-0.021713257,-0.051513672,0.0016717911,-0.058441162,-0.008575439,0.06036377,-0.018585205,0.0000436306,-0.007926941,-0.0340271,-0.0039634705,0.016311646,-0.03152466,-0.025985718,0.007858276,-0.02708435,-0.033172607,-0.07354736,-0.032287598,0.027008057,0.07574463,0.032043457,0.006061554,-0.029891968,-0.005722046,0.023162842,0.0058670044,0.0317688,-0.01486969,-0.015335083,-0.01864624,-0.022903442,-0.029891968,-0.014045715,0.017547607,0.024032593,-0.008338928,0.0006556511,0.015701294,-0.006706238,-0.015792847,-0.016204834,0.011405945,-0.011909485,0.0146865845,-0.007331848,0.052764893,-0.015960693,-0.030670166,-0.04083252,0.018310547,0.0073432922,0.034973145,-0.041534424,-0.009643555,0.008201599,0.008682251,-0.01763916,-0.029418945,0.008300781,0.002691269,-0.04937744,-0.07196045,0.053588867,-0.008056641,0.002363205,0.011512756,-0.011299133,0.014595032,-0.023971558,0.011276245,-0.006038666,-0.02911377,-0.026748657,-0.02798462,-0.019882202,-0.05001831,-0.038879395,-0.02229309,0.03451538,-0.021469116,0.050842285,-0.00969696,-0.030944824,0.028518677,0.037475586,0.015220642,0.0052261353,-0.016723633,-0.0018892288,0.036987305,0.017028809,-0.0597229,0.042510986,0.0041236877,0.018417358,0.023086548,0.04550171,0.022705078,-0.008705139,0.02357483,0.00038599968,-0.020065308,-0.02619934,-0.006160736,0.009986877,0.004043579,-0.019470215,-0.06335449,0.04144287,0.016540527,-0.052764893,-0.044799805,0.035736084,0.0259552,-0.043945312,0.020523071,-0.0036945343,0.045928955,-0.00579834,0.031021118,0.0034828186,0.03253174,0.026031494,-0.013137817,-0.013946533,3.5762787e-7,-0.016662598,0.008323669,0.0016651154,-0.00037527084,0.026672363,0.011413574,0.041137695,0.0019302368,-0.0057144165,-0.022781372,-0.02432251,0.017150879,-0.009498596,-0.02230835,0.033813477,0.0032806396,0.029586792,0.014022827,0.022705078,0.045135498,-0.0017318726,-0.018371582,-0.015533447,0.033477783,0.004295349,0.01260376,-0.0034866333,-0.0035247803,0.023803711,-0.05545044,-0.007446289,0.030136108,0.013710022,-0.0057792664,-0.05142212,-0.023666382,0.008369446,0.022155762,0.0074157715,-0.006210327,-0.0016307831,0.004623413,-0.018310547,-0.016555786,0.008666992,0.01285553,-0.031829834,-0.06591797,0.0016269684,-0.0015897751,0.012748718,-0.008995056,0.029159546,-0.023544312,-0.013633728,-0.0048675537,-0.040985107,0.0042304993,0.0048103333,-0.003583908,0.00630188,-0.009719849,0.013397217,-0.025222778,-0.05404663,0.012687683,-0.0039253235,0.07232666,-0.046661377,0.008026123,-0.002866745,-0.016784668,-0.0036754608,0.008140564,0.01586914,0.035705566,0.03286743,0.039733887,-0.038269043,0.046173096,-0.014335632,0.006046295,-0.002817154,-0.035705566,0.0034179688,-0.006729126,0.0023708344,0.048797607,-0.0068740845,0.0016956329,-0.036895752,-0.054534912,-0.0076560974,-0.046020508,0.032806396,0.027008057,0.054626465,-0.025497437,-0.0004925728,0.014533997,0.0066871643,-0.00724411,-0.029525757,-0.01373291,0.01637268,0.018798828,0.025497437,-0.03643799,-0.0054397583,-0.017974854,0.007194519,-0.039093018,-0.025253296,0.005344391,-0.0006170273,-0.0128479,0.014801025,-0.01789856,-0.012313843,0.0020618439,-0.041870117,-0.012237549,-0.0087890625,-0.0008420944,0.011749268,-0.009986877,-0.0107040405,0.024108887,-0.021530151,0.014846802,-0.00019979477,-0.030029297,-0.048461914,-0.006729126,0.0056533813,0.01876831,0.007511139,-0.032562256,-0.0074157715,-0.0074005127,-0.037384033,-0.0025691986,0.012283325,0.0018224716,0.003063202,-0.019256592,-0.024414062,0.010475159,-0.027160645,-0.027572632,0.0067253113,-0.017166138,0.007545471,-0.002035141,0.030441284,0.037322998,0.0051574707,-0.015037537,-0.01399231,0.010292053,0.03152466,0.036865234,0.019714355,-0.015571594,-0.027313232,0.0055351257,-0.014846802,-0.004989624,-0.0385437,0.021118164,-0.019592285,0.009643555,-0.017990112,0.030258179,-0.018173218,0.02355957,0.0637207,0.0118255615,0.006679535,0.0029125214,-0.01499939,0.02218628,0.036315918,-0.02658081,0.0073432922,-0.04949951,0.009651184,-0.015258789,0.045440674,0.010063171,0.03137207,-0.02142334,-0.009254456,0.016479492,-0.009223938,0.003932953,-0.056549072,-0.023162842,-0.053955078,-0.020202637,-0.0079422,-0.02078247,0.008155823,0.020721436,-0.011909485,-0.07904053,-0.0029792786,0.055664062,0.0014514923,-0.006450653,0.0184021,0.03186035,0.017822266,-0.041809082,-0.012969971,-0.008888245,-0.04083252,-0.011878967,-0.040496826,0.028564453,-0.010887146,-0.006587982,0.014701843,-0.005882263,0.028121948,-0.005493164,0.022644043,-0.008850098,0.0109939575,-0.024108887,0.0041160583,-0.0262146,-0.034484863,0.04748535,-0.037109375,0.032592773,0.04168701,0.035949707,0.003440857,0.01576233,0.033447266,-0.030517578,0.0044059753,0.03062439,0.033355713,0.018096924,-0.0024681091,0.015930176,0.01071167,0.007423401,-0.0124435425,-0.00033926964,0.0055274963,-0.023971558,0.0020771027,0.032714844,-0.0015230179,-0.0059890747,-0.009880066,0.0006093979,0.011138916,0.019958496,0.0074806213,-0.02796936,0.006919861,-0.011260986,-0.019760132,0.0063056946,0.013679504,-0.020553589,0.029449463,0.006958008,0.012184143,-0.00088119507,0.01499939,0.009361267,0.0519104,-0.0030975342,-0.0076560974,0.013267517,0.01675415,0.022094727,-0.01852417,0.020309448,-0.039855957,-0.0034332275,-0.009468079,0.0016202927,-0.0011310577,-0.041229248,0.010139465,-0.012504578,0.012397766,-0.011329651,-0.041503906,-0.013130188,-0.013946533,-0.02619934,-0.023071289,-0.0033092499,-0.0040779114,0.018630981,0.0020122528,-0.0029411316,-0.018035889,0.026168823,-0.0060691833,0.006641388,0.031707764,0.03955078,-0.0077934265,-0.03866577,-0.010795593,-0.007820129,-0.031097412,0.010536194,0.0030727386,-0.01939392,0.029190063,0.021240234,-0.005695343,-0.0020523071,0.041778564,-0.037200928,0.010848999,0.020721436,0.027420044,-0.0155181885,0.0158844,-0.03302002,0.025985718,0.009460449,0.028442383,0.004058838,-0.022613525,-0.0070877075,0.033416748,0.028335571,-0.009979248,0.033569336,0.014465332,0.035827637,-0.011703491,-0.012336731,-0.017364502,-0.01234436,-0.014038086,0.007621765,0.016906738,-0.006351471,0.011199951,-0.01499939,0.005836487,-0.04284668,0.017990112,0.0087890625,0.014595032,-0.046081543,-0.03955078,-0.010177612,-0.0035419464,-0.04159546,0.008666992,0.014076233,0.04260254,0.035217285,0.031829834,0.015144348,-0.011711121,0.015327454,-0.01386261,-0.029815674,-0.0063819885,-0.016921997,0.022232056,-0.015106201,0.054718018,0.057128906,0.00932312,0.02708435,0.016418457,0.016738892,0.024719238,0.007537842,-0.01739502,0.026031494,-0.007709503,0.023345947,0.016036987,0.023834229,-0.034210205,0.013305664,0.0022144318,0.020904541,-0.028076172,0.019332886,0.10144043,0.015609741,-0.002292633,0.05368042,-0.017974854,-0.028152466,-0.00008314848,-0.019821167,0.055633545,-0.0082473755,0.020935059,0.05633545,-0.0023384094,0.0014505386,0.007003784,-0.010887146,-0.035186768,0.05239868,0.036590576,-0.0055885315,-0.007965088,-0.022323608,0.013931274,-0.022781372,-0.02947998,0.012031555,-0.002292633,0.026504517,-0.019836426,0.008613586,-0.016296387,-0.0038967133,0.035614014,0.0044517517,-0.0102005005,0.041992188,0.011161804,-0.0013036728,0.016723633,-0.00920105,0.023788452,-0.010658264,-0.011230469,0.017196655,0.020217896,-0.0069732666,-0.025466919,0.0075645447,0.00086927414,0.034362793,0.036987305,-0.013824463,0.006866455,0.01737976,0.00308609,-0.005897522,0.03366089,0.016311646,0.014793396,0.040618896,0.03652954,0.018096924,-0.026687622,0.008987427,0.0045433044,0.029586792,-0.008422852,-0.004207611,-0.0013656616,-0.026565552,0.012779236,0.0014858246,-0.022537231,0.02293396,0.01940918,-0.006881714,-0.006690979,-0.023956299,0.030548096,-0.010826111,-0.02330017,-0.0045928955,0.0016069412,0.024612427,0.020309448,0.032348633,-0.013458252,0.023666382,0.020645142,-0.008514404,-0.005947113,0.0076026917,-0.022079468,-0.018844604,-0.0028514862,-0.020767212,-0.04776001,0.020126343,0.00005209446,0.02178955,0.025756836,0.00299263,-0.0077781677,-0.015350342,0.015350342,0.010597229,-0.014541626,-0.011581421,-0.0020599365,0.0012044907,0.03970337,-0.0065078735,0.0057258606,-0.0027656555,-0.0042533875,0.0070114136,-0.002779007,-0.020401001,-0.013839722,0.0019226074,-0.030334473,0.007663727,0.013549805,0.005508423,0.06756592,-0.015205383,-0.020309448,0.0090408325,0.018692017,0.007785797,0.0024375916,-0.006427765,0.01890564,-0.045806885,0.04598999,0.037384033,0.0098724365,0.011543274,-0.00920105,-0.03274536,-0.0054359436,-0.0021400452,0.015365601,-0.023330688,-0.005180359,0.0034828186,0.035736084,-0.023513794,-0.034423828,0.0059280396,-0.009094238,-0.006641388,-0.018463135,0.009902954,0.01486969,0.013748169,0.0061073303,0.026428223,-0.038604736,0.06695557,-0.021377563,0.053649902,-0.0259552,-0.010818481,0.04598999,0.017456055,0.032989502,-0.0072669983,-0.014701843,-0.029373169,-0.0046081543,0.0231781,0.012687683,0.020370483,-0.0016489029,-0.013877869,0.033294678,-0.008544922,0.026489258,0.0055770874,-0.0020503998,0.013008118,-0.024414062,-0.009483337,-0.0051612854,0.0013437271,0.021377563,0.008613586,-0.007965088,0.018798828,-0.02885437,0.0021762848,0.019302368,-0.0031909943,0.0032196045,-0.0025024414,-0.016448975,0.031463623,-0.015365601,-0.019500732,-0.0016880035,0.00069475174,-0.066589355,-0.008216858,0.008720398,0.0101623535,-0.028640747,0.055511475,0.01852417,-0.0030441284,0.0209198,0.02508545,-0.000055134296,0.03488159,0.0036525726,0.047851562,0.047088623,0.017074585,-0.01008606,0.0362854,0.006313324,-0.019195557,0.01852417,0.04916382,-0.006378174,0.028457642,-0.005393982,-0.012207031,-0.0076828003,-0.0096588135,-0.019927979,0.001666069,-0.009376526,-0.0115356445,-0.0055160522,0.024902344,-0.0026054382,-0.01876831,-0.020141602,-0.008056641,0.0041503906,0.035095215,0.01399231,-0.039642334,0.015571594,-0.005882263,-0.011688232,-0.004261017,-0.008293152,-0.0054016113,-0.048431396,-0.014266968,0.021621704,0.0057792664,0.03616333,-0.034210205,-0.000065386295,0.020812988,0.027389526,0.038146973,0.01763916,-0.012428284,0.007926941,0.00022256374,0.010551453,-0.018371582,-0.015586853,0.002380371,0.0112838745,0.02406311,-0.002565384,0.023345947,-0.01763916,0.0012979507,0.0018224716,0.005531311,0.016998291,-0.009757996,0.0079422,0.015335083,0.02619934,-0.013298035,-0.027236938,-0.0043029785,0.017059326,0.07531738,0.007774353,0.012710571,0.014930725,0.04071045,0.021835327,0.052337646,0.020584106,0.0211792,0.0032749176,-0.015014648,-0.0042800903,0.030181885,-0.01966858,-0.026290894,0.023880005,-0.03515625,-0.015419006,0.033111572,0.012496948,0.012916565,-0.028747559,-0.01638794,0.00020682812,-0.052215576,-0.00806427,-0.016296387,0.0015735626,-0.0035324097,-0.0063209534,0.02557373,0.0020980835,-0.03491211,-0.0074005127,-0.0049972534,-0.029525757,-0.06488037,-0.016723633,-0.019332886,0.010543823,-0.027908325,0.0071868896,-0.007583618,0.02218628,-0.008056641,-0.0135650635,-0.0009050369,0.020584106,0.03656006,0.016159058,0.01876831,-0.017059326,-0.038970947,-0.025253296,-0.0129776,0.00061798096,0.03366089,-0.028640747,0.02128601,0.024368286,-0.0071792603,0.0049819946,-0.0030918121,0.0031757355,-0.006034851,-0.0063552856,-0.01134491,0.00982666,0.027862549,0.00092220306,-0.022537231,0.031219482,-0.017471313,-0.038208008,0.009407043,0.045837402,0.024642944,0.015220642,0.013015747,-0.008422852,-0.04458618,0.0115737915,-0.01637268,0.008384705,0.018539429,-0.008560181,0.0027713776,0.020050049,0.015930176,-0.0043563843,-0.0030174255,0.041900635,0.031707764,0.0042648315,0.015335083,-0.005428314,0.016952515,-0.03717041,-0.010246277,0.0026226044,0.055358887,0.023086548,0.028015137,-0.01687622,0.0040779114,-0.023223877,-0.002840042,0.014518738,-0.029159546,-0.048431396,-0.008735657,-0.00075912476,0.028961182,0.0005207062,0.01953125,-0.028259277,0.018157959,-0.016830444,-0.034576416,-0.02494812,0.04928589,-0.0009088516,-0.026870728,-0.007663727,0.02192688,0.00016248226,-0.022735596,-0.014190674,-0.052764893,-0.021636963,-0.020477295,-0.0029087067,0.029144287,0.0010814667,0.0019741058,-0.007904053,0.0026512146,-0.0064086914,0.02619934,0.013671875,-0.012710571,-0.021652222,0.020431519,0.010772705,-0.009132385,0.0043945312,0.011711121,-0.006008148,-0.0020332336,0.0058135986,-0.0035877228,-0.039154053,0.022888184,0.011482239,-0.009407043,0.0112838745,-0.022766113,0.0357666,-0.0029525757,0.0129470825,-0.018234253,-0.009742737,0.04360962,-0.029006958,-0.021881104,-0.009140015,0.00072050095,-0.026275635,0.0057373047,0.010475159,0.015274048,-0.021453857,0.03894043,-0.014320374,-0.024337769,0.015930176,0.009460449,-0.013290405,-0.012756348,0.025787354,-0.0022201538,-0.00022745132,-0.013710022,-0.022369385,-0.010673523,-0.024932861,-0.0046463013,-0.00182724,0.0016822815,0.026763916,0.0052108765,0.056915283,0.018554688,0.013542175,0.017654419,0.0115356445,0.02218628,0.016296387,0.04510498,0.0154953,-0.028640747,0.018936157,0.003736496,-0.014022827,0.001821518,-0.017547607,0.015960693,-0.0034275055,-0.0062179565,-0.012969971,0.0045204163,0.021392822,0.008125305,-0.009674072,0.004486084,-0.046905518,-0.005935669,-0.020767212,-0.015197754,0.026519775,0.019332886,0.0006875992,-0.006526947,-0.011512756,0.027282715,0.026123047,-0.017974854,-0.005844116,-0.02168274,0.017532349,-0.005569458,0.02708435,0.012481689,-0.018997192,-0.018615723,-0.016845703,-0.013198853,0.012207031,-0.021316528,0.021087646,0.012031555,-0.022735596,-0.0146484375,0.025665283,-0.008834839,0.005458832,0.01751709,0.017166138,0.023147583,0.0146865845,-0.025787354,0.027572632,0.019119263,-0.042755127,0.042022705,0.02734375,-0.0014829636,0.0017118454,-0.009124756,-0.045074463,-0.012214661,-0.0038967133,-0.010917664],"createdAt":"2026-04-18T18:53:28.440Z","updatedAt":"2026-04-27T17:05:05.157Z","lastSeenAt":"2026-04-27T17:05:05.157Z","tsv":"'/api/v1/portfolios/86/holdings':91 '/request':13,26 '0.02':12,25,77,135 '000':130 '20':129 '402':211 '6':140 '86':36 'Base USDC micropayment API' 'actual':215 'addit':186 'address':146 'ai/ml':67 'analyt':66 'api':63,150,173 'appear':92 'avail':202,225 'base':9,22,86,131,148 'behind':42 'broader':52 'call':62,159 'caller':115 'challeng':46,212 'confirm':206 'connect':181 'content':188 'crypto pay-per-call API' 'data':4,17,33,65,70,216 'decim':141 'doc':171 'document':163,197 'dozen':57 'endpoint':28,90,204 'exampl':200 'extrem':168 'financ':97 'finance-rel':96 'finance/web3':69 'format':107 'gate':41 'handl':110 'header':122 'hold':3,16,32,103 'includ':117 'independ':161 'infer':68 'inform':104 'infrastructur':72 'investment holdings' 'json':106 'json-response' 'key':151 'limit':153 'live':207 'lowpaymentfee portfolio' 'lowpaymentfee.com':30,54 'materi':226 'micropay':7,20 'must':116 'network':10,23,87 'no-api-key' 'offer':56 'openapi':192 'page':176 'paid':162 'part':49 'pay':60 'pay-per-cal':59 'pay-per-request' 'payload':201 'payment':45,108,121,126,220 'payto':145 'per':61,78 'platform':53 'portfolio':2,15,35,102 'portfolio data endpoint' 'portfolio holdings API' 'portfolio-holdings' 'post':39 'price':75,172 'prompt':183 'proof':127 'proper':210 'protocol':114 'rate':152 'readm':175 'relat':98 'render':178 'request':40,79 'request/response':195 'requir':157 'resourc':99 'retriev':1,14 'return':31,101,208,217 'schema':196 'settl':81 'sinc':137 'site':166 'span':64 'spars':169 'spec':193 'specif':89 'specifi':144 'subscript':155 'success':219 'technic':187 'unit':132 'unknown':222 'usd':136 'usdc':83,134,138 'usdc-base' 'use':139 'util':73 'valid':125 'via':5,18,37,111 'wallet':182 'x':120 'x-payment':119 'x402':6,19,44,113 'x402 finance API' 'x402-payment'","prices":[{"id":"c74d3c0c-73a7-43ac-b406-67abea0f86d7","listingId":"f497fead-77d9-44e1-aea4-64518a02a147","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/86/holdings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:28.440Z"}],"sources":[{"listingId":"f497fead-77d9-44e1-aea4-64518a02a147","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/86/holdings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:28.440Z","lastSeenAt":"2026-04-27T17:05:05.157Z"}],"details":{"listingId":"f497fead-77d9-44e1-aea4-64518a02a147","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/86/holdings \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/86/holdings"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/portfolios/86/holdings"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching holdings data for a specific investment portfolio on demand","Integrating portfolio visibility into agent workflows without API key management","Paying per-request for financial data using USDC on Base"],"bestFor":["Agents or apps that need on-demand portfolio holdings without subscriptions","Developers experimenting with x402 pay-per-call patterns","Low-volume consumers who want to avoid API key registration"],"notFor":["High-frequency bulk data retrieval where per-call costs add up","Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone needing holdings for arbitrary portfolios (this endpoint is scoped to portfolio 86)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:58.237Z"},"updatedAt":"2026-04-27T17:05:05.157Z"}}