{"id":"42231e57-916c-4a7e-aade-fdec9d8e6b66","shortId":"gNr6tC","kind":"x402","title":"Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.","tagline":"Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns portfolio holdings data for a specific portfolio (ID 47) behind an x402 paywall. It accepts POST requests and responds with 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 specific endpoint falls under the finance category and serves portfolio holdings information. The x402 challenge is live and well-formed, returning a standard 402 Payment Required response with version 1 of the x402 protocol.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains or what parameters the POST body accepts. The endpoint is confirmed live but its actual data contract is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","portfolio-holdings","pay-per-call","no-api-key"],"categories":["finance"],"synonyms":["portfolio holdings","investment holdings","portfolio API","holdings data","asset allocation","portfolio positions","finance API"],"warnings":["No API documentation available — docs, pricing, and README pages all return only a wallet-connect prompt","No OpenAPI or JSON schema describing request parameters or response fields","Portfolio ID 47 is hardcoded in the URL; unclear if other portfolio IDs are available or how they are obtained","The nature and source of the holdings data is unspecified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/47/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/47/holdings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and all documentation pages returned only a wallet-connect prompt. The actual data contract is entirely 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":"2026-04-19T08:36:59.684Z","embedding":[-0.022018433,-0.02619934,0.030395508,0.01838684,0.008636475,-0.03591919,-0.020355225,0.008338928,0.066223145,-0.049743652,0.044525146,-0.0625,-0.015396118,-0.054656982,-0.0079422,0.0005059242,0.024429321,0.010017395,-0.05178833,0.05303955,0.0418396,-0.020584106,-0.019180298,0.0069389343,-0.008026123,0.0023422241,-0.014961243,-0.021499634,-0.028427124,-0.026855469,0.042877197,-0.021835327,-0.007030487,0.022445679,-0.02999878,0.00015068054,0.0079422,0.04425049,0.025314331,-0.0054359436,0.017425537,-0.05267334,0.031707764,-0.01386261,-0.038970947,-0.0046806335,0.033721924,-0.03793335,0.0317688,0.008071899,-0.04284668,-0.012199402,0.0032844543,0.028045654,0.012931824,0.012359619,0.028045654,0.008583069,-0.014785767,0.03390503,0.005176544,-0.048461914,0.010765076,-0.011291504,0.014755249,0.03878784,-0.026290894,0.0619812,0.0010204315,0.076049805,0.023620605,0.043884277,0.023452759,0.009536743,-0.016326904,-0.03189087,-0.012870789,0.030181885,0.0012054443,-0.04473877,-0.008743286,-0.0067977905,-0.07476807,-0.022476196,-0.022262573,-0.040893555,-0.012687683,0.0152282715,-0.052520752,0.03982544,-0.08673096,0.026657104,-0.005302429,0.004360199,0.0060653687,-0.042022705,0.005607605,0.01902771,-0.0042648315,0.016952515,0.0085372925,-0.022125244,-0.0071640015,0.0070991516,0.016845703,0.055877686,0.009979248,0.04748535,0.007080078,-0.015335083,-0.059295654,-0.00095558167,-0.003288269,0.02079773,0.0154418945,-0.019927979,-0.028823853,0.011940002,-0.030715942,0.015556335,-0.050231934,0.023025513,0.033477783,0.0073394775,0.02053833,-0.039093018,-0.011672974,-0.0015077591,-0.043426514,-0.030532837,0.026931763,0.0070991516,0.007850647,-0.008720398,-0.036102295,0.008728027,-0.023269653,-0.036102295,-0.048797607,-0.030044556,0.038360596,-0.03277588,0.03050232,0.011993408,-0.07574463,0.022659302,-0.014427185,0.02027893,-0.0019626617,-0.019760132,0.014038086,0.026260376,-0.014877319,0.017059326,-0.007030487,-0.03237915,-0.025283813,0.026367188,-0.0038337708,0.02748108,0.002670288,0.018997192,-0.01574707,0.0017528534,0.016418457,0.020385742,0.012306213,-0.05441284,-0.073791504,-0.018753052,0.017868042,-0.008079529,-0.016967773,-0.0026512146,-0.010101318,-0.06524658,0.00027012825,-0.017562866,0.0022640228,-0.07269287,-0.012611389,-0.03164673,0.034332275,-0.009864807,-0.06536865,0.0014152527,-0.014167786,0.061584473,0.02268982,0.021331787,0.037139893,0.007888794,0.05984497,0.047698975,-0.032470703,-0.020141602,-0.00077342987,-0.0017728806,0.0060424805,-0.001917839,0.016418457,-0.016159058,0.03314209,0.058654785,0.008544922,-0.015014648,0.0031414032,-0.05319214,-0.040374756,-0.009727478,0.033813477,0.0044441223,-0.011795044,0.008155823,-0.013633728,-0.025131226,0.013755798,0.015609741,0.0034885406,0.051818848,0.008628845,0.04171753,0.0345459,0.0070381165,-0.03768921,0.04736328,0.023544312,0.017807007,0.0065994263,-0.06542969,0.03274536,0.013702393,-0.0234375,-0.0024261475,-0.00029182434,0.014381409,-0.04006958,-0.008590698,0.003419876,-0.012374878,-0.0063552856,-0.026229858,-0.0045661926,0.020462036,0.006839752,-0.018569946,-0.0259552,-0.08569336,0.01991272,0.017929077,0.038269043,-0.0053863525,0.0028190613,-0.019561768,-0.0047798157,-0.047943115,0.019683838,0.05130005,-0.019104004,-0.022598267,0.012237549,-0.020935059,-0.0463562,-0.011474609,-0.012413025,-0.015991211,-0.025268555,-0.0066833496,-0.060577393,0.0181427,0.004966736,0.047607422,0.032989502,-0.024475098,-0.067871094,0.0025978088,-0.031433105,0.008995056,-0.044158936,-0.0048217773,0.007106781,0.01965332,-0.0077781677,0.022247314,0.026306152,0.008331299,0.015586853,0.008529663,-0.004714966,0.013198853,-0.008956909,0.010177612,0.027786255,-0.05102539,0.009094238,-0.010108948,0.041931152,-0.03050232,0.041107178,-0.011962891,0.02986145,0.048431396,-0.0055656433,-0.07159424,0.016357422,-0.007598877,0.02999878,0.039794922,-0.024520874,-0.009765625,-0.03857422,0.06427002,-0.02368164,0.0050697327,0.0075531006,0.023269653,0.034210205,-0.016235352,-0.044281006,-0.044433594,-0.00856781,-0.029220581,0.021621704,-0.0019197464,0.029327393,-0.014518738,0.022369385,-0.019042969,-0.003168106,-0.02192688,-0.01096344,-0.026824951,0.005645752,-0.013076782,-0.016098022,0.0076675415,0.0034255981,-0.0061950684,0.042663574,0.022949219,0.019363403,-0.009490967,-0.015808105,-0.01928711,-0.020629883,-0.050689697,0.021133423,0.050109863,0.0015239716,0.019989014,-0.016479492,-0.0055656433,0.028717041,0.015960693,0.029251099,-0.012718201,-0.008102417,-0.050476074,-0.072509766,-0.026473999,-0.02609253,0.016845703,0.026412964,0.007507324,0.041748047,0.014877319,-0.013031006,-0.05899048,0.037353516,-0.060516357,0.01008606,0.034729004,-0.02507019,-0.034454346,-0.0060272217,0.010505676,0.010299683,0.040740967,0.025177002,-0.0006260872,0.04525757,0.007686615,0.012237549,-0.007385254,0.023971558,0.024002075,-0.012611389,-0.006828308,-0.041259766,-0.0012903214,0.016983032,-0.0006842613,-0.03213501,-0.07080078,0.02571106,0.028793335,0.06732178,0.02911377,0.022125244,0.0029830933,-0.036193848,-0.0072784424,-0.047058105,-0.010551453,-0.035614014,-0.046325684,0.020065308,0.006515503,0.020217896,-0.022537231,0.017791748,-0.016159058,0.020568848,-0.02986145,0.048553467,-0.017593384,-0.012458801,0.0054359436,0.011291504,0.04953003,0.055236816,-0.03338623,0.037719727,0.0042648315,-0.03152466,-0.00289917,0.048614502,-0.025405884,-0.018218994,-0.06756592,-0.03668213,0.0075912476,-0.003665924,-0.0113220215,-0.0006160736,-0.0020523071,0.03967285,-0.0004441738,-0.028121948,-0.022338867,0.013877869,0.005050659,-0.061157227,-0.017471313,-0.032928467,0.012290955,0.040283203,-0.008575439,-0.01739502,0.013336182,-0.019592285,-0.00422287,0.04714966,0.019363403,0.011352539,-0.033721924,0.0178833,0.00025773048,-0.0017309189,0.007511139,0.027008057,0.036621094,0.019348145,0.05279541,0.026672363,-0.0029449463,-0.05429077,-0.004623413,-0.041137695,-0.001200676,0.048461914,-0.033050537,-0.014915466,-0.028335571,-0.026367188,0.0021362305,0.011505127,-0.038970947,-0.028015137,0.020141602,-0.01701355,-0.03845215,-0.0680542,-0.030426025,0.02999878,0.09246826,0.02255249,0.008102417,-0.02684021,-0.008148193,0.020111084,-0.0017080307,0.022155762,-0.015853882,-0.009483337,-0.017715454,-0.02999878,-0.02394104,-0.011993408,0.019180298,0.022155762,-0.0039024353,0.009628296,0.02142334,0.016525269,-0.007171631,-0.008636475,0.012512207,-0.012664795,0.019348145,-0.005290985,0.06121826,-0.0069122314,-0.025497437,-0.051361084,0.033111572,0.012687683,0.03491211,-0.033233643,-0.004360199,-0.005443573,0.0039901733,-0.022109985,-0.025466919,0.012039185,0.010047913,-0.055511475,-0.06939697,0.04837036,-0.011238098,0.012672424,0.018661499,-0.0062942505,0.016525269,-0.018753052,0.017684937,-0.0029792786,-0.020706177,-0.014984131,-0.035095215,-0.03060913,-0.04815674,-0.04119873,-0.026779175,0.031585693,-0.02420044,0.037506104,-0.018417358,-0.03050232,0.02709961,0.03164673,0.012939453,0.012832642,-0.015357971,-0.0021915436,0.04827881,0.014541626,-0.060638428,0.035614014,0.015823364,0.0026931763,0.019073486,0.044128418,0.0158844,-0.010955811,0.0067977905,-0.005088806,-0.015022278,-0.033966064,-0.013214111,0.002620697,0.005268097,-0.0184021,-0.03591919,0.03845215,0.035461426,-0.041748047,-0.037384033,0.035095215,0.014144897,-0.026473999,0.02029419,0.001996994,0.048614502,-0.03024292,0.027511597,0.0048294067,0.030075073,0.02420044,-0.00019729137,-0.0041656494,0.0059394836,-0.012191772,0.0019950867,0.015930176,-0.021499634,0.019897461,0.005836487,0.04107666,-0.0022602081,-0.0024604797,-0.020141602,-0.02494812,0.006462097,-0.011352539,-0.02003479,0.047210693,0.0042648315,0.0129776,0.007534027,0.017425537,0.034606934,-0.0013494492,-0.006828308,-0.010429382,0.036621094,0.0068588257,0.008880615,0.004814148,0.0003669262,0.035247803,-0.04611206,-0.012237549,0.03036499,0.01007843,-0.015686035,-0.04562378,-0.026367188,-0.009048462,0.040771484,0.015686035,-0.0035820007,0.010505676,0.0034122467,-0.018966675,-0.01108551,0.007671356,0.002943039,-0.03866577,-0.059417725,0.0032176971,0.012130737,0.009628296,-0.022583008,0.028320312,-0.023620605,-0.008895874,0.0052452087,-0.043121338,0.007106781,0.0043296814,-0.008888245,0.011314392,-0.008239746,0.011291504,-0.014053345,-0.052642822,0.014854431,0.0011339188,0.0736084,-0.052947998,-0.006362915,-0.002981186,-0.004497528,0.003540039,0.0032463074,0.011993408,0.04397583,0.019989014,0.04449463,-0.03451538,0.04095459,-0.019226074,0.01146698,-0.0026569366,-0.055877686,-0.0032367706,-0.007888794,-0.0028877258,0.051635742,-0.025543213,0.0051078796,-0.03677368,-0.042663574,-0.010246277,-0.045959473,0.038391113,0.024505615,0.045806885,-0.023971558,-0.0015821457,0.007820129,0.011505127,-0.012207031,-0.029220581,-0.012664795,0.016677856,0.005104065,0.021697998,-0.033416748,-0.01386261,-0.0037498474,0.015159607,-0.028793335,-0.034332275,0.0042381287,-0.009353638,-0.0061950684,0.032287598,-0.009048462,-0.014305115,0.00031018257,-0.036865234,-0.0064582825,-0.009231567,0.020477295,0.015853882,-0.0018978119,-0.015609741,0.020462036,-0.008262634,0.025314331,-0.0031166077,-0.027862549,-0.05722046,-0.0002104044,0.013046265,0.025772095,0.0043907166,-0.022018433,-0.0062217712,-0.017349243,-0.05886841,-0.009628296,0.017166138,-0.0119018555,0.0067329407,-0.004211426,-0.029785156,0.012992859,-0.031036377,-0.016311646,0.0046653748,-0.006072998,0.018493652,-0.0067977905,0.026123047,0.04647827,-0.0040664673,-0.016830444,-0.0072135925,0.010871887,0.011581421,0.03555298,0.03515625,-0.024124146,-0.032714844,0.010070801,-0.0020923615,-0.009475708,-0.032470703,0.018615723,-0.016799927,0.0037403107,0.002117157,0.016952515,-0.016067505,0.012763977,0.067871094,0.0056610107,0.008529663,-0.007003784,-0.011054993,0.02166748,0.047210693,-0.03515625,0.010025024,-0.04144287,0.02041626,-0.027908325,0.03793335,0.011985779,0.023986816,-0.009536743,-0.0154800415,0.0006480217,-0.004299164,0.004257202,-0.049041748,-0.021377563,-0.07293701,0.0030097961,-0.008323669,-0.036346436,0.020324707,0.0206604,-0.024810791,-0.07611084,0.000579834,0.052886963,-0.0051612854,0.0011825562,0.0005226135,0.0309906,0.021942139,-0.026992798,-0.0049552917,0.0059661865,-0.037139893,-0.013206482,-0.041381836,0.028747559,-0.018249512,-0.004764557,0.006008148,-0.0017147064,0.024856567,-0.0057144165,0.024047852,-0.005973816,0.022521973,-0.0262146,-0.0074539185,-0.011390686,-0.025238037,0.04714966,-0.04284668,0.03353882,0.037109375,0.017730713,0.0064811707,0.0033817291,0.02708435,-0.03201294,0.009803772,0.02418518,0.03149414,0.026565552,-0.009269714,0.01701355,0.028823853,0.01550293,-0.010734558,-0.0041999817,-0.013679504,-0.029464722,-0.012001038,0.030288696,-0.0096588135,-0.004322052,-0.009750366,0.004463196,0.019744873,0.0071372986,0.021331787,-0.023254395,-0.00642395,-0.028640747,0.0070114136,0.0019435883,0.004798889,-0.018432617,0.027801514,0.0038204193,0.016448975,-0.0031108856,0.009605408,0.009056091,0.036468506,-0.0019760132,-0.0031738281,0.021118164,0.010253906,0.034973145,-0.010757446,0.017532349,-0.045532227,-0.0073928833,-0.014587402,0.008453369,-0.0012998581,-0.03677368,0.008049011,-0.015106201,0.007320404,-0.012641907,-0.037475586,-0.017837524,-0.012008667,-0.020614624,-0.014022827,-0.010643005,0.005970001,0.016525269,0.0057411194,-0.01109314,-0.015777588,0.022155762,0.00080537796,0.01159668,0.026977539,0.03338623,-0.0036067963,-0.021774292,-0.008529663,-0.0054740906,-0.028656006,0.008979797,-0.0079193115,-0.014556885,0.025405884,0.020248413,-0.0024776459,0.0011615753,0.03466797,-0.014694214,0.010246277,0.017364502,0.0335083,-0.014060974,0.014587402,-0.034942627,0.01751709,0.005268097,0.02130127,0.0056419373,-0.013153076,-0.0020179749,0.027069092,0.027038574,0.0004246235,0.050048828,0.009277344,0.042663574,-0.009437561,-0.014915466,-0.021881104,-0.0028629303,-0.013587952,0.0017213821,0.010932922,0.009483337,0.018341064,-0.015701294,0.013679504,-0.043914795,0.020568848,0.014945984,0.01600647,-0.038238525,-0.04788208,-0.013259888,-0.0009088516,-0.048706055,0.016098022,0.011024475,0.04815674,0.021209717,0.042053223,0.0030059814,0.021591187,0.011131287,-0.030685425,-0.02432251,-0.012527466,-0.0069122314,0.012046814,-0.010398865,0.035614014,0.048309326,0.0013952255,0.02810669,0.02519226,0.014053345,0.01876831,0.0154418945,-0.01889038,0.030899048,-0.0023078918,0.0141067505,0.013679504,0.035461426,-0.013916016,0.020889282,-0.0034561157,0.03173828,-0.038909912,0.014038086,0.09246826,0.018356323,-0.0099487305,0.054870605,-0.028289795,-0.029968262,-0.005832672,-0.017211914,0.049194336,-0.011383057,0.036224365,0.040283203,0.013496399,-0.0062026978,-0.0009665489,-0.014266968,-0.032836914,0.04144287,0.041137695,-0.0124053955,-0.008460999,-0.019058228,0.015449524,-0.023376465,-0.03050232,0.014022827,0.0010461807,0.017913818,-0.0052490234,-0.00019097328,-0.015602112,-0.010818481,0.02720642,0.0019779205,-0.014274597,0.05206299,0.019973755,0.005443573,0.018859863,0.00081920624,0.02494812,-0.013130188,-0.012840271,0.010955811,0.018447876,0.014434814,-0.02407837,0.02180481,-0.005493164,0.03842163,0.04345703,-0.01259613,0.006122589,0.017486572,0.00022017956,-0.003944397,0.045043945,0.0079956055,0.010231018,0.03390503,0.034301758,0.015197754,-0.028823853,0.021850586,0.008132935,0.023910522,-0.01210022,-0.0050315857,0.003566742,-0.03756714,0.029251099,0.0021476746,-0.028121948,0.032836914,0.021850586,-0.013702393,-0.0010099411,-0.009361267,0.028335571,-0.021316528,-0.020614624,-0.019500732,-0.0066566467,0.013069153,0.034423828,0.039093018,0.0034332275,0.034057617,0.022918701,-0.013008118,-0.020446777,0.009719849,-0.025726318,-0.014129639,-0.008079529,-0.015853882,-0.04135132,0.021514893,0.00091314316,0.01776123,0.02268982,0.0010128021,-0.012718201,-0.0067634583,0.020980835,0.011764526,0.0043945312,0.008399963,-0.0064582825,0.007671356,0.04006958,-0.0072135925,0.0020523071,-0.014717102,-0.012771606,0.009994507,-0.0053749084,-0.01763916,-0.0061149597,-0.00011610985,-0.026855469,-0.00018310547,0.023406982,0.0066452026,0.06518555,-0.012992859,-0.016525269,0.0067863464,0.033477783,-0.0002849102,-0.0028533936,-0.014076233,0.013702393,-0.027435303,0.04144287,0.030044556,-0.0006933212,0.018920898,0.0057296753,-0.020553589,-0.0054359436,-0.0024967194,0.017700195,-0.023040771,-0.010269165,0.007965088,0.027679443,-0.031143188,-0.03387451,-0.0034389496,-0.012176514,-0.0135269165,-0.032684326,0.010498047,0.0017995834,0.015014648,0.01663208,0.026504517,-0.033477783,0.06488037,-0.016159058,0.036010742,-0.025497437,-0.0030269623,0.042877197,0.024520874,0.039489746,-0.003129959,-0.0064811707,-0.025390625,0.0032310486,0.0284729,0.020095825,0.025985718,-0.0041046143,-0.014381409,0.024017334,-0.0071640015,0.025131226,0.0055160522,-0.0070991516,0.016662598,-0.019927979,-0.01209259,-0.0044403076,-0.004928589,0.014701843,0.01676941,-0.005504608,0.028442383,-0.023925781,-0.002067566,0.022354126,0.0016174316,-0.0007610321,0.0046424866,-0.0031814575,0.028015137,-0.028213501,-0.019714355,-0.002450943,0.002588272,-0.06677246,-0.021575928,0.006893158,0.016082764,-0.027359009,0.059661865,0.015731812,0.00029921532,0.01537323,0.03137207,-0.005088806,0.027053833,-0.005443573,0.04156494,0.049224854,0.010917664,-0.015556335,0.03829956,0.0035324097,-0.015914917,0.023025513,0.04827881,-0.0028896332,0.031311035,0.0044288635,-0.0035591125,0.002571106,-0.003566742,-0.015342712,-0.0014410019,-0.011154175,-0.013969421,-0.0019235611,0.022384644,-0.011749268,-0.011192322,-0.0025596619,-0.0037765503,0.0039253235,0.042297363,0.016723633,-0.035217285,0.019180298,-0.0046157837,-0.0036735535,-0.00762558,-0.0059814453,0.000852108,-0.04647827,0.006401062,0.025817871,-0.0031795502,0.035736084,-0.03552246,-0.0067329407,0.03692627,0.013572693,0.02772522,0.004295349,-0.003929138,0.018051147,-0.011001587,0.010055542,-0.014022827,-0.010902405,0.013648987,0.0070114136,0.012046814,-0.020690918,0.027542114,-0.023254395,0.0049858093,0.0074310303,0.011245728,0.017486572,-0.013252258,0.0009665489,0.014160156,0.028549194,-0.018814087,-0.028442383,0.0002799034,0.020645142,0.08508301,0.0051956177,0.016067505,0.024841309,0.03262329,0.02041626,0.052337646,0.014221191,0.028213501,0.011650085,-0.016464233,-0.007835388,0.042755127,-0.009963989,-0.024383545,0.02810669,-0.041870117,-0.02029419,0.020050049,0.010551453,0.014411926,-0.039642334,-0.0040397644,-0.009140015,-0.037872314,-0.0067977905,-0.013267517,-0.0060920715,-0.001241684,0.0015621185,0.0234375,0.0066375732,-0.022537231,-0.013175964,0.00248909,-0.027053833,-0.0592041,-0.007499695,-0.023742676,0.007457733,-0.02418518,0.010375977,-0.004840851,0.026290894,-0.0155181885,-0.004558563,-0.005405426,0.02003479,0.04159546,0.01197052,0.011810303,-0.021743774,-0.028152466,-0.019714355,-0.011734009,0.00022041798,0.03793335,-0.025650024,0.01763916,0.040802002,-0.00415802,-0.009338379,-0.004901886,0.005680084,-0.0056762695,-0.010139465,-0.015090942,0.019805908,0.021331787,-0.003944397,-0.01939392,0.032287598,-0.020568848,-0.026062012,0.0027217865,0.05316162,0.02192688,0.01737976,0.0030765533,-0.007888794,-0.048797607,0.007297516,-0.015357971,0.005065918,0.015808105,-0.006416321,0.0024776459,0.020889282,0.021560669,-0.011856079,-0.005504608,0.048583984,0.016662598,0.006427765,0.02192688,-0.0037670135,0.009407043,-0.036743164,-0.018920898,0.007499695,0.05130005,0.014877319,0.013343811,-0.013130188,-0.004398346,-0.016021729,0.0021877289,0.011207581,-0.020706177,-0.050628662,-0.008049011,-0.010765076,0.03164673,-0.0013713837,0.010551453,-0.023788452,0.016189575,-0.008956909,-0.032287598,-0.030776978,0.046722412,0.006412506,-0.022460938,-0.004852295,0.023757935,0.0005927086,-0.024368286,-0.0042495728,-0.05529785,-0.020614624,-0.021209717,-0.004497528,0.024169922,-0.0021457672,0.008666992,-0.01576233,0.0023326874,-0.00088882446,0.030792236,0.01499939,-0.014839172,-0.009353638,0.022720337,0.013893127,-0.0039596558,0.0066566467,0.0049209595,-0.008033752,-0.006614685,-0.0015907288,-0.004131317,-0.032440186,0.029144287,0.021575928,-0.0022411346,0.021026611,-0.022369385,0.0335083,-0.002292633,0.021011353,-0.027542114,-0.00818634,0.033294678,-0.022644043,-0.015106201,-0.0027046204,-0.0067825317,-0.023452759,0.004184723,0.018157959,0.028823853,-0.031982422,0.035186768,-0.017822266,-0.02507019,0.013931274,0.010604858,-0.017044067,-0.0026760101,0.021392822,0.0030899048,0.0004274845,-0.0011606216,-0.015548706,-0.025634766,-0.019699097,0.0027503967,-0.007419586,0.005680084,0.039245605,-0.000579834,0.05203247,0.013877869,0.013587952,0.019607544,0.007881165,0.027908325,0.010810852,0.03970337,0.018859863,-0.02305603,0.018310547,-0.0016918182,-0.014320374,0.008407593,-0.008888245,0.020355225,-0.015144348,-0.000869751,-0.01134491,0.008834839,0.018707275,0.011154175,-0.0058898926,0.013664246,-0.04220581,-0.008644104,-0.018737793,-0.0016374588,0.02758789,0.021743774,0.0023784637,-0.0034389496,-0.009300232,0.028930664,0.04019165,-0.018997192,-0.008056641,-0.02078247,0.014892578,-0.007320404,0.021331787,0.0061531067,-0.015609741,-0.013427734,-0.0047416687,-0.018753052,0.014373779,-0.028793335,0.016784668,0.003419876,-0.007270813,-0.024108887,0.022583008,-0.01247406,0.0027484894,0.022720337,0.0062294006,0.017974854,0.0066108704,-0.030136108,0.016983032,0.024642944,-0.033233643,0.039215088,0.029815674,0.0011987686,0.0015563965,-0.0043411255,-0.0435791,-0.025756836,-0.007347107,-0.014907837],"createdAt":"2026-04-18T18:52:58.412Z","updatedAt":"2026-04-28T09:06:26.063Z","lastSeenAt":"2026-04-28T09:06:26.063Z","tsv":"'0.02':10,22,67,102 '000':71 '0x8335':61 '1':146 '20':70 '2913':62 '402':140 '47':38 '6':75 'accept':44,198 'actual':206 'ai/ml':93 'analyt':92 'api':89,107,158 'asset allocation' 'base':8,20,56,72 'behind':39 'bodi':197 'broad':82 'call':88 'catalog':83 'categori':122 'challeng':130 'commit':114 'confirm':202 'connect':167 'contain':191 'content':173 'contract':60,208 'cost':65 'crawl':156 'data':3,15,32,91,207 'decim':76 'descript':184 'doc':157 'document':151 'endpoint':26,117,200 'exampl':181 'extrem':153 'fall':118 'field':187 'financ':121 'finance API' 'finance/web3':95 'form':136 'hold':2,14,31,126,189 'holdings data' 'host':80 'id':37 'infer':94 'inform':127 'infrastructur':97 'investment holdings' 'json':50 'key':108 'limit':111 'live':132,203 'lowpaymentfee.com':28,79 'micropay':6,18 'network':9,21,57 'no-api-key' 'openapi':177 'page':162 'paramet':194 'pay':86 'pay-per-cal':85 'pay-per-call' 'payment':51,141 'paywal':42 'per':11,23,68,87,103 'portfolio':1,13,30,36,125 'portfolio API' 'portfolio holdings' 'portfolio positions' 'portfolio-holdings' 'post':45,196 'price':100,159 'prompt':169 'protocol':150 'provid':78 'rate':110 'readm':161 'request':12,24,46,69,104 'request/response':180 'requir':142 'respond':48 'respons':143,190 'return':29,137,164 'schema':178 'serv':124 'settl':53 'span':90 'spars':154 'specif':35,116 'standard':139 'unit':73 'unknown':210 'usdc':59 'usdc-base' 'use':58 'util':98 'version':145 'via':4,16 'wallet':168 'well':135 'well-form':134 'x402':5,17,41,129,149 'x402-payment'","prices":[{"id":"787cc288-7ad7-476e-a461-90105cca843c","listingId":"42231e57-916c-4a7e-aade-fdec9d8e6b66","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/47/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":"2026-04-18T18:52:58.412Z"}],"sources":[{"listingId":"42231e57-916c-4a7e-aade-fdec9d8e6b66","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/47/holdings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:58.412Z","lastSeenAt":"2026-04-28T09:06:26.063Z"}],"details":{"listingId":"42231e57-916c-4a7e-aade-fdec9d8e6b66","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/47/holdings \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 version 1 challenge requiring USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/47/holdings"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/portfolios/47/holdings"},{"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"},{"claim":"maxAmountRequired is 20000 base units (USDC 6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/portfolios/47/holdings"}],"useCases":["Retrieving current holdings for portfolio #47 programmatically","Integrating portfolio data into dashboards or trading bots","Agent-driven portfolio monitoring with micropayments"],"bestFor":["Developers needing on-demand portfolio holdings without subscription commitments","AI agents that can settle x402 payments on Base network","Low-volume or sporadic access to portfolio data at $0.02 per call"],"notFor":["High-frequency bulk data retrieval where per-call pricing adds up","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:59.705Z"},"updatedAt":"2026-04-28T09:06:26.063Z"}}