{"id":"a97eb468-c093-461a-bfe2-c32f0cd9c2c0","shortId":"N558pt","kind":"x402","title":"x402-gated portfolio endpoint on Base, pay $0.02 per request in USDC — no API keys needed.","tagline":"x402-gated portfolio endpoint on Base, pay $0.02 per request in USDC — no API keys needed.","description":"This endpoint at `/api/v1/portfolios/7` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific `/portfolios/7` resource is listed under \"Premium API Access\" but its exact data payload is not documented beyond the generic description.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment of 20,000 base units of USDC (0x8335…2913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The response MIME type is `application/json` and the method is POST. No API keys, rate limits, or subscriptions are required — each call is independently settled on-chain.\n\nDocumentation is extremely sparse. The landing page lists many endpoints across four categories but provides no request/response schemas, parameter descriptions, or example payloads. The `/docs`, `/pricing`, `/api`, and `/README` pages all render only a \"Connect wallet\" prompt with no additional content. Because of this, the actual data returned by `/api/v1/portfolios/7` cannot be confirmed from available materials.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","json-response","portfolio-data"],"categories":["finance","data"],"synonyms":["portfolio API","premium data endpoint","pay-per-call API","x402 USDC API","lowpaymentfee","Base network API","micro-payment API"],"warnings":["No request or response schema available for /api/v1/portfolios/7","All documentation pages (/docs, /pricing, /README) render only 'Connect wallet' with no content","The purpose and payload of 'Premium API Access' at /portfolios/7 is undocumented — the name is generic","Cannot verify what data is returned without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/7","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/7","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 the x402 challenge is well-formed with clear pricing ($0.02 USDC on Base). However, there is no documentation of request parameters, response schema, or example payloads for this specific endpoint. The docs/pricing/README pages are all empty beyond a wallet-connect prompt, making it impossible to confirm what data is actually returned.","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":"2026-04-19T08:48:32.841Z","embedding":[-0.005191803,-0.010444641,0.03704834,0.005859375,0.0105896,-0.017288208,-0.017532349,0.020614624,0.06707764,-0.059783936,0.01626587,-0.0513916,-0.023620605,-0.049743652,0.0005273819,0.004764557,0.020401001,-0.0027694702,-0.061401367,0.059570312,0.032226562,-0.02633667,-0.008903503,0.046875,-0.014801025,-0.011978149,-0.0032958984,-0.006374359,-0.010917664,-0.031204224,0.027008057,-0.027389526,-0.00957489,0.025222778,-0.03152466,0.01461792,0.015777588,0.061676025,0.020507812,0.00054836273,0.011512756,-0.051239014,0.020904541,-0.011268616,-0.02406311,-0.0127334595,0.026062012,-0.041259766,0.005306244,0.027450562,-0.027832031,0.0013284683,-0.004585266,0.010559082,0.011894226,0.02571106,0.013786316,-0.007545471,0.002855301,0.019119263,0.020324707,-0.037750244,-0.0046958923,0.014083862,0.009613037,0.036254883,-0.030548096,0.05014038,-0.002204895,0.08404541,0.0206604,0.049926758,0.036712646,0.021835327,-0.02607727,-0.02709961,-0.014984131,0.036346436,0.0013008118,-0.023712158,-0.003982544,0.0028629303,-0.06591797,-0.010391235,-0.039123535,-0.055145264,-0.027786255,0.017166138,-0.03866577,0.03829956,-0.076416016,-0.0034637451,-0.020095825,0.01638794,-0.017730713,-0.0043258667,-0.002954483,0.026794434,-0.004764557,0.027450562,0.012001038,-0.040618896,-0.0073165894,0.013412476,0.054718018,0.037750244,0.0077209473,0.045715332,-0.012832642,-0.03604126,-0.03111267,-0.0048065186,-0.009056091,0.028152466,0.013801575,-0.009094238,-0.029083252,0.025878906,-0.013511658,0.021713257,-0.064331055,0.024261475,0.0134887695,-0.009712219,0.01360321,-0.031204224,-0.01524353,-0.005619049,-0.018661499,-0.03744507,0.018859863,0.013473511,0.003025055,-0.007827759,-0.011360168,-0.0023612976,-0.021347046,-0.032318115,-0.0625,-0.00881958,0.031707764,-0.029342651,0.04626465,0.017944336,-0.09301758,0.02204895,-0.028900146,0.045196533,-0.023620605,-0.013435364,0.0082473755,0.022338867,-0.014755249,-0.007160187,0.004787445,-0.06088257,-0.026947021,0.02217102,0.002002716,0.036010742,-0.0019235611,0.032409668,-0.0035648346,0.009109497,0.032958984,0.04562378,-0.02142334,-0.07159424,-0.07293701,-0.02999878,0.019866943,-0.016616821,-0.010047913,-0.018844604,0.004688263,-0.088256836,-0.029190063,-0.0031871796,0.009803772,-0.04434204,-0.018081665,-0.03857422,0.0057258606,-0.006416321,-0.054534912,-0.0015277863,-0.020339966,0.030578613,0.0013256073,0.017837524,0.046417236,-0.0053482056,0.053344727,0.02999878,-0.024337769,-0.030700684,0.007873535,0.0045280457,0.017440796,-0.004776001,0.008201599,-0.0063323975,0.037841797,0.055664062,-0.0016288757,-0.0143585205,0.0101623535,-0.050231934,-0.03881836,-0.019638062,0.014556885,0.0021533966,-0.020324707,0.009422302,-0.022521973,-0.04159546,0.0057029724,0.02104187,0.017547607,0.059051514,0.011276245,0.024993896,0.02796936,0.012939453,-0.021026611,0.042755127,0.025482178,0.008361816,0.0015525818,-0.0340271,0.029418945,0.019332886,-0.021469116,-0.011428833,-0.022033691,0.010726929,-0.018325806,-0.012786865,0.01373291,-0.014907837,-0.0072250366,-0.029953003,-0.0062675476,0.018066406,0.0096206665,-0.011810303,-0.04550171,-0.0725708,0.03152466,0.06088257,0.042938232,0.0059318542,-0.0031490326,-0.028152466,-0.011581421,-0.047180176,0.033294678,0.07501221,-0.013824463,-0.016067505,0.016021729,-0.01838684,-0.019805908,-0.019134521,-0.007835388,-0.017089844,-0.023361206,0.0016031265,-0.050689697,0.023391724,0.022994995,0.023254395,0.017181396,-0.02708435,-0.054260254,-0.019424438,-0.010551453,0.00079488754,-0.051574707,-0.011795044,0.029815674,0.026657104,-0.0034542084,0.037322998,0.022338867,-0.016204834,0.02041626,0.01309967,-0.00060653687,-0.0087509155,-0.013763428,0.012702942,0.018981934,-0.068725586,0.016479492,-0.0085372925,0.02494812,-0.04736328,0.03652954,-0.009857178,0.020309448,0.016967773,-0.023071289,-0.064819336,0.014663696,0.0061416626,0.028457642,0.053833008,-0.02468872,-0.007926941,-0.015716553,0.06286621,-0.029632568,-0.015808105,0.0020828247,0.028442383,0.0259552,-0.013633728,-0.043029785,-0.030654907,-0.0022850037,-0.011741638,0.04257202,-0.008071899,0.021820068,-0.008453369,0.012199402,-0.026916504,-0.006401062,-0.026443481,-0.0034980774,-0.0030212402,-0.0044784546,0.00025320053,-0.011451721,-0.002439499,-0.011062622,0.00349617,0.010421753,0.026000977,0.01838684,-0.005317688,-0.016601562,-0.046081543,0.0037117004,-0.027572632,0.043029785,0.04397583,0.014022827,0.01991272,-0.028076172,-0.004501343,0.018676758,0.020355225,0.03491211,-0.003824234,0.0033054352,-0.04916382,-0.07141113,-0.015991211,-0.027313232,0.036865234,0.012306213,0.0026416779,0.02709961,0.02230835,-0.009941101,-0.05456543,0.041168213,-0.045196533,0.0039367676,0.050811768,-0.025253296,-0.029953003,0.014099121,0.0022182465,0.005897522,0.03652954,0.018356323,-0.00016570091,0.045043945,0.025405884,0.007019043,0.017730713,0.03955078,0.004184723,-0.006591797,-0.010215759,-0.015426636,-0.0070762634,0.005012512,-0.015975952,-0.023971558,-0.08947754,0.047058105,0.03665161,0.0725708,0.022903442,0.017669678,0.027709961,-0.025604248,-0.005054474,-0.031204224,-0.017425537,-0.037322998,-0.03945923,0.02508545,0.0047721863,0.015327454,-0.034088135,0.035705566,-0.011367798,0.003271103,-0.049804688,0.074523926,-0.022216797,-0.013252258,0.007736206,0.0035095215,0.045928955,0.03475952,-0.03137207,0.039245605,0.012901306,-0.027450562,-0.0032672882,0.045318604,-0.0028247833,-0.0146484375,-0.061706543,-0.047607422,-0.0066490173,-0.00894165,-0.025604248,-0.008346558,0.004722595,0.04043579,0.010604858,-0.023757935,-0.0075531006,0.034362793,0.0017442703,-0.05593872,-0.014892578,-0.051574707,0.021636963,0.05670166,-0.015930176,-0.010688782,0.002084732,-0.021606445,0.009414673,0.022018433,0.0024337769,-0.0076293945,-0.02960205,0.03994751,-0.0028419495,0.017807007,0.0158844,0.03527832,0.055267334,-0.0021266937,0.051696777,0.021408081,-0.017807007,-0.050994873,0.009216309,-0.06695557,-0.009483337,0.039398193,-0.0048332214,-0.006790161,-0.025665283,-0.027008057,-0.001543045,0.0052757263,-0.014060974,0.012802124,0.017044067,-0.016525269,-0.031585693,-0.06982422,-0.032592773,0.0020389557,0.07733154,0.038391113,-0.010482788,-0.046875,-0.006591797,0.02859497,-0.0064697266,0.025512695,-0.014793396,-0.008369446,-0.01789856,-0.029296875,-0.018051147,-0.016098022,0.03616333,0.008171082,-0.0031776428,0.008110046,0.009864807,0.00894928,-0.026794434,-0.0138168335,0.020553589,-0.0146484375,-0.0009965897,-0.016921997,0.04168701,-0.002614975,-0.014663696,-0.04449463,0.038482666,-0.015022278,0.03378296,-0.041412354,-0.0039711,0.02583313,0.008422852,-0.006790161,-0.033050537,0.00390625,0.011909485,-0.03302002,-0.0947876,0.049041748,-0.02468872,0.00642395,0.0019817352,0.0035057068,0.02204895,-0.014137268,0.01398468,-0.002752304,-0.023788452,-0.031585693,-0.03955078,-0.0368042,-0.028442383,-0.011329651,-0.033569336,0.01802063,-0.019622803,0.02381897,-0.01373291,-0.039733887,0.032318115,0.024459839,0.013145447,0.019195557,0.0017385483,0.010604858,0.04949951,0.004383087,-0.036895752,0.024139404,0.008354187,0.0065307617,0.017349243,0.056518555,0.010810852,-0.012207031,0.022903442,-0.00036215782,-0.018325806,-0.026611328,-0.01739502,0.005153656,0.027648926,-0.022079468,-0.038116455,0.03111267,0.015075684,-0.042175293,-0.04144287,0.019744873,0.03253174,-0.036987305,0.027023315,0.0059776306,0.04421997,-0.0418396,0.030517578,0.00022292137,0.02809143,0.025131226,0.010757446,-0.0078048706,0.011810303,-0.018478394,0.015556335,0.0045280457,-0.00063991547,0.009292603,-0.0010442734,0.024215698,0.010902405,0.015510559,-0.032989502,-0.02583313,0.0035381317,-0.01524353,-0.018066406,0.02532959,0.009780884,0.015426636,-0.0068473816,0.033935547,0.02281189,-0.020004272,-0.02822876,-0.015380859,0.03302002,0.012817383,0.02406311,-0.00031900406,-0.00070238113,0.027893066,-0.04727173,-0.0056610107,0.00881958,-0.0021209717,-0.0069732666,-0.042236328,-0.037017822,0.008834839,0.025436401,0.014778137,-0.0031223297,0.012374878,-0.0037136078,-0.014556885,-0.017242432,0.009796143,0.0062713623,-0.023712158,-0.05117798,0.00079631805,0.010238647,0.004550934,-0.020523071,0.016708374,-0.025039673,-0.021118164,0.0067443848,-0.028198242,-0.011444092,-0.0019741058,0.001086235,0.023101807,-0.0146102905,0.010719299,-0.025421143,-0.05114746,0.017456055,-0.01889038,0.06707764,-0.039916992,0.025314331,-0.006061554,-0.024932861,0.005947113,0.00504303,0.003873825,0.024673462,-0.00086832047,0.042877197,-0.042633057,0.039611816,-0.02772522,0.013244629,0.0007286072,-0.043121338,-0.010292053,-0.007461548,-0.0073509216,0.0513916,-0.020385742,-0.00907135,-0.041168213,-0.026290894,-0.017868042,-0.047210693,0.016540527,0.019439697,0.044830322,-0.023269653,0.0000577569,0.020401001,0.01399231,-0.011154175,-0.02720642,-0.0015563965,0.0132751465,0.017547607,0.011054993,-0.03765869,-0.009147644,-0.0090789795,0.008346558,-0.040771484,-0.040252686,-0.004005432,-0.00026798248,-0.014335632,0.014579773,-0.02532959,-0.016326904,-0.008605957,-0.042144775,-0.0025634766,-0.0041160583,0.009986877,0.020843506,-0.0065956116,-0.009498596,0.04650879,-0.03237915,0.0110321045,-0.012748718,-0.009399414,-0.04989624,-0.014480591,0.008255005,0.027313232,-0.0014257431,-0.010566711,0.008117676,-0.025375366,-0.064819336,0.0036125183,0.005996704,-0.005592346,0.017456055,-0.020370483,-0.0345459,-0.0020580292,-0.03567505,-0.008575439,0.002483368,-0.002231598,0.008865356,0.012184143,0.007270813,0.029220581,-0.016143799,-0.029220581,-0.005622864,0.010375977,0.0059661865,0.030151367,0.031799316,-0.010223389,-0.0046081543,0.011871338,0.008460999,0.0096588135,-0.03933716,0.0066184998,-0.022628784,0.005493164,0.0041236877,0.008171082,-0.04232788,0.024414062,0.064086914,0.0050086975,-0.009773254,0.004501343,-0.014129639,0.02557373,0.04473877,-0.02168274,-0.003282547,-0.04727173,0.029663086,-0.0051078796,0.03527832,0.010604858,0.024597168,-0.015129089,-0.016921997,-0.005302429,0.006198883,-0.0057640076,-0.05279541,-0.013420105,-0.051513672,-0.0077667236,-0.031677246,-0.019592285,0.009101868,0.023071289,-0.01600647,-0.078552246,0.0068855286,0.066101074,0.0036334991,0.0038871765,-0.007232666,0.03741455,0.01789856,-0.030029297,-0.015716553,0.008369446,-0.040740967,0.0018444061,-0.02532959,0.04119873,-0.018112183,-0.018981934,0.01727295,-0.005317688,0.03164673,-0.009155273,0.025756836,-0.010971069,0.004322052,-0.010269165,0.014572144,-0.0037002563,-0.042755127,0.030471802,-0.033569336,0.032836914,0.02947998,0.018676758,-0.008224487,0.023910522,0.037506104,-0.039154053,-0.019165039,0.043670654,0.014442444,0.01927185,-0.01285553,0.025405884,0.022338867,0.008514404,-0.015899658,-0.00907135,-0.01789856,-0.041137695,-0.025360107,0.04156494,-0.002576828,-0.012992859,-0.019454956,0.014060974,0.0067100525,-0.0028076172,-0.009094238,-0.030944824,-0.0029354095,-0.025924683,0.0059776306,0.0009384155,0.010047913,-0.0047454834,0.024032593,0.015930176,0.015510559,0.001832962,0.007637024,0.0077400208,0.036010742,0.0017528534,-0.0045166016,0.013381958,0.016845703,0.02166748,-0.008239746,0.03010559,-0.04486084,-0.021911621,-0.01826477,-0.008735657,0.0007548332,-0.021636963,0.013633728,-0.0018491745,-0.0048561096,-0.0055236816,-0.036315918,-0.002357483,-0.020935059,-0.026397705,-0.0067977905,-0.0104599,-0.006259918,0.022460938,0.007873535,-0.008270264,-0.021728516,0.026504517,-0.008338928,-0.01209259,0.036071777,0.03805542,-0.008033752,-0.033416748,-0.007396698,-0.013679504,-0.033691406,0.00995636,-0.01159668,0.00068569183,0.03778076,-0.005126953,0.0073242188,0.0029258728,0.032958984,-0.021331787,0.01852417,0.009513855,0.020324707,-0.037506104,0.030410767,-0.041107178,0.023147583,0.018798828,0.028152466,-0.008407593,-0.020568848,-0.01826477,0.023284912,0.012260437,-0.011436462,0.032409668,0.0022602081,0.03604126,-0.0039024353,-0.022354126,-0.008964539,-0.014816284,-0.020523071,0.026916504,-0.001250267,0.0040130615,0.013328552,-0.007030487,0.0019168854,-0.038726807,0.0045166016,0.019638062,0.021652222,-0.03274536,-0.027526855,-0.012771606,-0.01763916,-0.039916992,0.0034561157,0.0021457672,0.047851562,0.032073975,0.02923584,0.0050354004,0.008056641,0.018508911,-0.03704834,-0.02204895,-0.016723633,-0.018585205,0.017730713,-0.007843018,0.05014038,0.054718018,0.013931274,0.033721924,0.032440186,0.016784668,-0.0001347065,0.004219055,-0.018341064,0.03704834,-0.00995636,0.008422852,0.014533997,0.031341553,-0.034362793,0.015777588,0.00957489,0.015930176,-0.030395508,0.03186035,0.08074951,0.028793335,-0.0154953,0.061553955,-0.011672974,-0.02130127,-0.011192322,-0.0025424957,0.052612305,-0.0014572144,0.020751953,0.04348755,0.003610611,-0.010009766,-0.006099701,-0.01235199,-0.04373169,0.03704834,0.031707764,-0.0065345764,-0.0048179626,-0.008834839,0.012031555,-0.05303955,-0.025619507,0.008468628,-0.0016002655,0.009887695,-0.009536743,0.011314392,-0.028884888,0.005241394,0.015167236,-0.002773285,-0.019958496,0.023422241,0.015914917,-0.0020771027,0.03262329,-0.002609253,0.03363037,-0.0038375854,-0.015808105,0.017868042,0.032043457,0.000998497,-0.0031871796,0.021743774,-0.0042686462,0.03338623,0.036224365,-0.018554688,-0.011009216,0.017852783,0.018310547,-0.008026123,0.03579712,0.02319336,0.0124053955,0.041900635,0.046020508,0.011566162,-0.040008545,0.011672974,-0.006965637,0.026367188,-0.009429932,-0.012557983,0.022964478,-0.0155181885,0.010498047,-0.005142212,-0.025848389,0.030212402,0.018920898,0.007835388,-0.004840851,-0.007709503,0.020721436,-0.012313843,-0.01701355,-0.0021743774,-0.00059843063,0.021087646,0.029556274,0.040100098,-0.023147583,0.036102295,0.011375427,-0.016906738,-0.009475708,0.01737976,-0.033599854,-0.019882202,-0.0104599,-0.023986816,-0.052124023,0.013450623,0.012779236,0.011161804,0.015670776,0.0075569153,-0.003019333,-0.004722595,0.0138168335,0.012611389,-0.012802124,-0.0040283203,-0.01977539,0.0055160522,0.041168213,-0.016159058,0.006664276,-0.025527954,-0.008232117,0.020141602,-0.0138168335,-0.012123108,-0.004989624,0.007511139,-0.037139893,0.00063705444,0.035003662,0.006351471,0.057922363,-0.01600647,-0.023284912,-0.0031967163,0.025314331,0.005016327,0.00856781,-0.021743774,0.012992859,-0.030517578,0.05117798,0.035003662,0.0015001297,0.01977539,-0.025344849,-0.025848389,-0.018844604,-0.00053167343,0.025817871,-0.011444092,-0.0075531006,-0.009048462,0.037353516,-0.0077209473,-0.030578613,-0.002571106,-0.013679504,-0.019851685,-0.020065308,0.025375366,-0.0017490387,0.021255493,0.02355957,0.024230957,-0.03552246,0.06842041,-0.01473999,0.04989624,-0.027709961,-0.00434494,0.054626465,0.024307251,0.036468506,0.008270264,-0.007675171,-0.022583008,0.011444092,0.02305603,0.037902832,0.020645142,0.004814148,-0.0087509155,0.02772522,0.0058937073,0.02015686,0.0059928894,0.0065689087,0.005771637,-0.020889282,-0.0059165955,-0.003753662,0.0138168335,0.014442444,0.02885437,-0.016326904,0.015090942,-0.026535034,-0.0066871643,0.027893066,0.01637268,0.01096344,-0.013786316,-0.02798462,0.027862549,-0.019577026,-0.034057617,0.0014629364,0.015548706,-0.07336426,-0.015823364,0.005168915,0.009307861,-0.030471802,0.0635376,0.01889038,-0.011299133,0.022994995,0.027938843,-0.009567261,0.04034424,0.0023822784,0.056396484,0.04473877,0.0015592575,-0.008308411,0.02822876,0.02709961,-0.0158844,0.01210022,0.042175293,0.014663696,0.014167786,-0.0020122528,-0.005821228,-0.002538681,0.0073890686,-0.024230957,0.003917694,-0.01222229,-0.005657196,0.006477356,0.020095825,-0.0058135986,-0.0018959045,-0.010620117,-0.0024681091,0.00074243546,0.046447754,0.02456665,-0.027130127,0.01197052,-0.009933472,0.008575439,-0.008560181,-0.016647339,-0.0032405853,-0.047973633,0.008399963,0.030731201,-0.008148193,0.017303467,-0.032073975,-0.002632141,0.038330078,0.021316528,0.03616333,0.028198242,-0.015533447,0.0034732819,-0.00027918816,0.005355835,-0.010528564,0.007461548,0.005657196,0.007003784,0.0050086975,-0.025222778,0.018798828,-0.014762878,0.0032539368,0.00712204,0.00096178055,0.035949707,-0.0066070557,-0.005542755,0.017105103,0.02861023,-0.009353638,-0.027679443,-0.015899658,0.017654419,0.06384277,-0.0000666976,0.00819397,0.017059326,0.030578613,0.022583008,0.04724121,0.014373779,0.018829346,0.012512207,-0.02015686,-0.004337311,0.033294678,-0.012893677,-0.028198242,0.021469116,-0.028305054,-0.011741638,0.035705566,0.0154800415,0.010986328,-0.048461914,-0.010643005,-0.02494812,-0.034576416,0.005355835,-0.0124435425,-0.0020160675,-0.006427765,-0.008415222,0.026107788,0.000702858,-0.017150879,-0.02571106,0.014793396,-0.01789856,-0.05505371,-0.010688782,-0.017852783,0.008872986,-0.011932373,0.014099121,-0.0053215027,0.032409668,-0.017410278,0.0118637085,-0.00274086,0.010284424,0.0066375732,0.015327454,0.018081665,-0.018569946,-0.03414917,-0.01878357,-0.0023708344,-0.0071983337,0.027160645,-0.027313232,0.015365601,0.021774292,-0.00017750263,0.0002667904,-0.014465332,-0.0121154785,-0.015205383,-0.02607727,-0.018035889,0.011512756,0.03111267,0.010154724,-0.011947632,0.039916992,-0.009925842,-0.025222778,0.0029468536,0.052886963,0.022476196,0.022445679,0.001912117,-0.0019226074,-0.050598145,0.0049438477,-0.01574707,-0.010375977,0.022491455,-0.0011692047,-0.001332283,0.011955261,0.012161255,-0.010292053,0.00038456917,0.028884888,0.024887085,0.0032444,0.04348755,-0.0039253235,0.0048980713,-0.029403687,-0.008010864,0.004623413,0.052734375,0.018478394,0.019042969,-0.019439697,-0.001332283,-0.0010309219,0.0055618286,0.008926392,-0.006679535,-0.039093018,-0.020431519,-0.017333984,0.023529053,0.0043945312,0.008018494,-0.011047363,0.008293152,-0.019714355,-0.03945923,-0.01939392,0.033233643,-0.004917145,-0.016937256,-0.0011339188,0.0112838745,0.001540184,-0.021453857,-0.005508423,-0.04901123,-0.024978638,-0.028640747,-0.008979797,0.019683838,-0.002380371,0.0065956116,-0.0038146973,0.007835388,-0.014320374,0.024810791,0.018661499,-0.02381897,-0.01789856,0.024505615,0.015609741,-0.014595032,0.004878998,0.014038086,-0.009895325,0.010223389,-0.009399414,0.011299133,-0.033966064,0.01398468,0.019683838,-0.020843506,0.032165527,-0.00945282,0.026870728,-0.0031719208,0.01461792,-0.02281189,-0.0013532639,0.016113281,-0.021606445,-0.019638062,-0.005683899,-0.002729416,-0.033172607,0.0124435425,0.02166748,0.020767212,-0.009765625,0.036224365,-0.011436462,-0.032714844,0.012130737,0.020126343,-0.024459839,0.00019145012,0.031921387,-0.0014982224,0.0017461777,-0.0021400452,-0.0059928894,-0.02822876,-0.029403687,0.001490593,-0.005039215,-0.0022735596,0.018981934,0.007095337,0.05307007,-0.005558014,-0.0016088486,0.03225708,0.006664276,0.030548096,0.0022525787,0.03918457,0.017196655,-0.03488159,0.0146865845,0.0019025803,-0.019958496,-0.004886627,-0.011810303,0.022949219,-0.022857666,0.015197754,-0.00040364265,0.02166748,0.011924744,0.017242432,-0.006000519,0.007926941,-0.04888916,-0.008369446,-0.03414917,0.009292603,0.029449463,0.024871826,0.0051231384,-0.00041270256,-0.027755737,0.032958984,0.02760315,-0.005126953,-0.030548096,-0.009796143,0.01096344,-0.0050735474,0.018508911,0.022460938,-0.021728516,-0.01826477,-0.015068054,-0.022537231,0.004146576,-0.013168335,0.020858765,0.014572144,-0.01071167,-0.013504028,0.01713562,-0.011024475,0.0019760132,0.0060272217,0.009880066,0.03793335,0.016098022,-0.028274536,0.02154541,0.034210205,-0.04421997,0.035736084,0.014060974,0.004421234,-0.008903503,0.0037269592,-0.045837402,-0.0060577393,-0.007965088,-0.008934021],"createdAt":"2026-04-18T18:53:15.847Z","updatedAt":"2026-04-27T18:36:24.442Z","lastSeenAt":"2026-04-27T18:36:24.442Z","tsv":"'/api':187 '/api/v1/portfolios/7':38,210 '/docs':185 '/portfolios/7':67 '/pricing':186 '/readme':189 '0.02':9,26,116 '000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x8335':108 '20':102 '2913':109 '402':98 '6':121 'Base network API' 'access':74 'across':171 'actual':206 'addit':200 'address':131 'ai/ml':59 'analyt':58 'api':15,32,55,73,145 'application/json':138 'avail':215 'base':7,24,104,112 'beyond':83 'call':154 'cannot':211 'categori':173 'chain':160 'challeng':96 'collect':46 'confirm':213 'connect':195 'content':201 'data':57,78,207 'decim':122 'descript':86,180 'document':82,161 'endpoint':5,22,36,88,170 'equal':115 'exact':77,128 'exampl':182 'extrem':163 'finance/web3':61 'four':172 'gate':3,20 'generic':85 'http':97 'independ':156 'infer':60 'infrastructur':63 'json-response' 'key':16,33,146 'land':166 'limit':148 'list':70,168 'live':90 'lowpaymentfee' 'lowpaymentfee.com':43 'made':125 'mani':169 'materi':216 'method':141 'micro-payment API' 'mime':135 'need':17,34 'network':113 'no-api-key' 'on-chain':158 'page':167,190 'paramet':179 'part':40 'pay':8,25,52 'pay-per-call API' 'pay-per-request':51 'payload':79,183 'payment':100,123 'per':10,27,53,117 'per-request-billing' 'platform':44 'portfolio':4,21 'portfolio API' 'portfolio-data' 'post':143 'premium':72 'premium data endpoint' 'prompt':197 'protocol':50 'provid':175 'rate':147 'render':192 'request':11,28,54,99,118 'request/response':177 'requir':152 'resourc':68 'respons':134 'return':92,208 'schema':178 'scheme':129 'settl':157 'span':56 'spars':164 'specif':66 'subscript':150 'type':136 'unit':105 'usdc':13,30,107,119 'usdc-base' 'use':120 'util':64 'valid':94 'via':126 'wallet':196 'x402':2,19,49,95 'x402 USDC API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"9972aef2-bb66-4d6c-a7c6-4f12a8cd3695","listingId":"a97eb468-c093-461a-bfe2-c32f0cd9c2c0","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/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:15.847Z"}],"sources":[{"listingId":"a97eb468-c093-461a-bfe2-c32f0cd9c2c0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:15.847Z","lastSeenAt":"2026-04-27T18:36:24.442Z"}],"details":{"listingId":"a97eb468-c093-461a-bfe2-c32f0cd9c2c0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/7 \\\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":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/7"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/portfolios/7"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /README) show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching portfolio data on-demand with per-request USDC micropayments","Agent-driven data retrieval without managing API keys or subscriptions","Integrating pay-as-you-go financial data into automated workflows"],"bestFor":["Developers wanting zero-setup, keyless API access","AI agents that can settle x402 payments autonomously","Users who prefer per-call pricing over monthly subscriptions"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk/subscription pricing","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:58.9Z"},"updatedAt":"2026-04-27T18:36:24.442Z"}}