{"id":"0b30c67e-8870-4293-9684-e3d39bd25e37","shortId":"L7P9GQ","kind":"x402","title":"x402-gated portfolio transactions endpoint on Base, paid per-call in USDC.","tagline":"x402-gated portfolio transactions endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to portfolio transaction data via a POST request to `/api/v1/portfolios/62/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities.\n\nThe specific endpoint probed here is gated by the x402 protocol (version 1) on the Base network. Each call costs up to $0.02 USDC (maxAmountRequired of 20,000 base units with 6 decimals), settled to a designated wallet address. The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render 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 transactions endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body is expected or what transaction data is returned.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","portfolio-transactions","post-endpoint","per-call-pricing"],"categories":["finance","data"],"synonyms":["portfolio transactions API","x402 paid API","USDC micropayment API","lowpaymentfee","Base network API","pay-per-call API","crypto payment endpoint"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages are all empty","No OpenAPI or schema definition for request or response bodies","The endpoint path includes a hardcoded portfolio ID (62), suggesting it may be a specific resource rather than a general-purpose API","Purpose and data returned by this endpoint are entirely undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/62/transactions","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/62/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint (portfolios/62/transactions) is unclear and undocumented.","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":"2026-04-19T08:49:06.250Z","embedding":[-0.025527954,-0.007408142,0.032073975,0.0034675598,0.0018615723,-0.024871826,-0.015533447,0.008705139,0.083740234,-0.060943604,0.031051636,-0.045654297,-0.035095215,-0.031280518,-0.013809204,-0.0015077591,-0.0013971329,0.0077667236,-0.04925537,0.042785645,0.046539307,-0.04043579,-0.013557434,0.019927979,-0.032348633,-0.0013017654,-0.014427185,-0.008155823,-0.038208008,-0.021820068,0.043762207,-0.020523071,-0.013343811,-0.0055236816,-0.031433105,0.00919342,0.009338379,0.04751587,0.0262146,-0.006969452,0.018814087,-0.03717041,0.0011758804,-0.01889038,-0.019058228,-0.0026988983,0.021377563,-0.042297363,0.03024292,0.002986908,-0.03286743,-0.024337769,-0.0008916855,0.042144775,0.02571106,0.008552551,0.022598267,-0.02835083,0.01348114,0.023269653,-0.00037932396,-0.054382324,0.016204834,0.00020766258,0.010444641,0.041381836,-0.029312134,0.05316162,-0.012367249,0.06903076,0.022018433,0.034423828,0.017608643,0.01084137,-0.0074920654,-0.015083313,-0.014945984,0.03793335,-0.010437012,-0.049713135,-0.003774643,-0.010322571,-0.070251465,-0.01210022,-0.021026611,-0.059783936,-0.013221741,0.0054130554,-0.04611206,0.034973145,-0.092041016,0.011131287,0.010116577,0.025650024,-0.022598267,-0.024841309,0.009925842,0.019683838,-0.007095337,0.021362305,0.029708862,-0.023620605,0.017089844,0.010185242,0.054595947,0.010002136,0.017929077,0.047088623,-0.011795044,-0.019332886,-0.024917603,-0.0040283203,0.0027046204,0.02508545,-0.0005941391,-0.018569946,-0.008468628,0.027923584,-0.0049057007,0.021331787,-0.058532715,0.033203125,0.010528564,-0.009140015,0.016159058,-0.032318115,-0.0236969,0.007820129,-0.035369873,-0.015144348,0.025268555,0.004650116,-0.011299133,-0.020111084,-0.012306213,0.013801575,-0.040161133,-0.008720398,-0.061950684,-0.0129776,0.02507019,-0.032165527,0.034698486,0.023406982,-0.11029053,0.024856567,-0.03149414,0.0602417,-0.023910522,-0.0019359589,0.026290894,0.0209198,-0.012130737,-0.013542175,0.0056495667,-0.044891357,-0.020843506,0.038635254,0.0075035095,0.034484863,-0.011299133,0.030517578,0.030700684,0.023117065,0.01586914,0.023376465,-0.0017938614,-0.05609131,-0.07196045,-0.029937744,0.02923584,-0.028503418,-0.017211914,0.0126953125,-0.0028076172,-0.09436035,-0.030090332,-0.007068634,-0.0075683594,-0.047210693,-0.020721436,-0.033599854,0.0058670044,-0.020370483,-0.07354736,-0.0014314651,-0.015716553,0.04260254,0.0034503937,0.014289856,0.031433105,0.014541626,0.043029785,0.051086426,-0.021606445,-0.031097412,-0.0018539429,-0.0020313263,0.024551392,-0.005722046,0.032073975,-0.037109375,0.032287598,0.055847168,-0.008728027,-0.029815674,0.011795044,-0.06149292,-0.032043457,-0.025558472,0.031143188,-0.0012483597,-0.033935547,0.020126343,-0.005821228,-0.019638062,0.012680054,0.021743774,0.01725769,0.068603516,0.015449524,0.023208618,0.014640808,0.009437561,-0.028305054,0.054748535,0.026763916,0.0037956238,-0.0098724365,-0.06414795,0.012741089,0.030471802,-0.022109985,-0.01260376,0.0000808835,0.0021648407,-0.020645142,-0.02217102,0.026794434,-0.022598267,-0.006614685,-0.027023315,-0.009277344,0.015655518,0.0066604614,-0.016601562,-0.039978027,-0.08874512,0.033447266,0.04650879,0.019134521,0.0034713745,0.00038290024,-0.00022351742,-0.009239197,-0.0680542,0.03378296,0.040222168,-0.02456665,-0.03161621,0.03152466,-0.016342163,-0.022537231,-0.019104004,-0.024368286,-0.02015686,-0.02128601,0.0005645752,-0.049194336,0.016601562,0.024719238,0.028152466,0.02897644,0.0039024353,-0.070739746,-0.01637268,-0.025177002,0.013153076,-0.03579712,-0.032440186,0.020614624,0.019577026,0.009284973,0.026870728,0.010887146,0.007019043,0.015136719,0.015792847,0.014778137,0.0047302246,-0.015144348,0.02861023,0.0023479462,-0.055389404,0.02015686,-0.0044898987,0.05130005,-0.035369873,0.03567505,-0.02835083,0.009086609,0.04107666,-0.031433105,-0.057403564,-0.00095939636,0.0042381287,0.028930664,0.04159546,-0.013496399,0.005027771,-0.042755127,0.0473938,-0.007987976,-0.01776123,0.014343262,0.034362793,0.044067383,0.0030097961,-0.062194824,-0.021087646,-0.0051345825,-0.030593872,0.032196045,-0.01260376,0.019485474,0.009735107,0.014633179,-0.021331787,-0.0004940033,-0.022827148,-0.0021476746,-0.032196045,-0.012687683,-0.016281128,-0.0058288574,0.032287598,-0.00042366982,0.0024585724,0.009216309,0.027877808,0.008659363,0.0062026978,-0.02885437,-0.020523071,-0.004951477,-0.022613525,0.020767212,0.03567505,0.013763428,0.016357422,-0.019836426,-0.024291992,0.020385742,0.028030396,0.046783447,-0.0034618378,-0.0076675415,-0.05444336,-0.054473877,-0.018432617,-0.02330017,0.029388428,0.020370483,0.011100769,0.01676941,0.024551392,-0.016738892,-0.042816162,0.038238525,-0.03201294,0.015205383,0.038116455,-0.017684937,-0.0126953125,0.01096344,0.0073165894,0.0065956116,0.027954102,0.013290405,0.005569458,0.045196533,0.031143188,0.01361084,0.0029792786,0.006843567,0.025039673,-0.02041626,-0.01133728,-0.027236938,-0.026062012,0.00079870224,-0.014060974,-0.033050537,-0.06756592,0.03729248,0.030212402,0.08660889,0.024291992,0.024307251,0.010467529,-0.022415161,-0.00092697144,-0.029815674,-0.03765869,-0.045288086,-0.05328369,0.033569336,0.013938904,0.022888184,-0.03375244,0.036102295,0.0069351196,0.011054993,-0.03543091,0.058258057,-0.022277832,-0.01713562,0.014808655,0.02330017,0.051818848,0.078308105,-0.032104492,0.012969971,0.04220581,-0.031066895,0.0071868896,0.016693115,-0.010932922,-0.020568848,-0.05987549,-0.038848877,0.005760193,-0.018157959,-0.03366089,0.0018825531,0.009811401,0.040771484,0.011192322,-0.008651733,-0.007282257,0.009483337,0.008628845,-0.044952393,-0.010635376,-0.047180176,0.02319336,0.043182373,-0.01777649,-0.0050582886,-0.011756897,-0.011520386,0.019363403,0.030517578,-0.016815186,-0.011940002,-0.02281189,0.03149414,-0.0031280518,0.017959595,0.006652832,0.03286743,0.03024292,0.0017595291,0.03704834,0.019577026,-0.018554688,-0.06982422,-0.004699707,-0.06173706,-0.0072402954,0.03274536,-0.037963867,-0.010177612,-0.018554688,-0.03363037,0.014213562,0.0035305023,-0.033233643,-0.0048446655,0.0098724365,-0.013290405,-0.03314209,-0.052215576,-0.019195557,0.014602661,0.07543945,0.0209198,0.004512787,-0.031280518,-0.014526367,0.0362854,-0.004096985,0.030715942,-0.013511658,-0.018356323,-0.014755249,-0.04144287,-0.038848877,-0.013381958,0.03579712,-0.0027580261,-0.0038051605,0.007358551,-0.013183594,0.019500732,0.0022697449,-0.018630981,0.011314392,0.009666443,0.003982544,-0.008277893,0.04385376,-0.002620697,-0.041503906,-0.04989624,0.027572632,-0.0073013306,0.04458618,-0.038635254,-0.0104904175,0.012390137,0.015350342,-0.022537231,-0.03741455,0.003030777,0.015525818,-0.031097412,-0.06011963,0.048614502,-0.020080566,0.008918762,0.014770508,-0.0033359528,0.019226074,-0.013038635,0.017501831,0.007686615,-0.035736084,-0.031173706,-0.05267334,-0.038391113,-0.035217285,0.00007104874,-0.029693604,0.026443481,-0.025436401,0.02822876,-0.021408081,-0.029891968,0.039245605,0.016983032,0.009857178,0.026641846,0.0011053085,0.0069122314,0.038024902,0.0011281967,-0.030090332,0.02911377,0.011016846,-0.0010633469,0.0037078857,0.049987793,-0.005065918,-0.009605408,0.022506714,-0.017623901,-0.011268616,-0.028533936,-0.015701294,0.0048179626,0.02520752,-0.0035057068,-0.019165039,0.036499023,0.0063323975,-0.039001465,-0.05532837,0.01448822,0.025283813,-0.037017822,0.016723633,0.011047363,0.04446411,-0.03451538,0.016601562,0.0061187744,0.0513916,0.02986145,0.008842468,0.0066986084,0.0024776459,-0.017425537,0.008224487,0.01348114,-0.01651001,0.00642395,0.003446579,0.032196045,0.014717102,0.026443481,-0.0236969,-0.037017822,0.0044937134,-0.011436462,-0.025787354,0.016647339,0.0034561157,0.032348633,0.0014686584,0.03567505,0.03427124,-0.007835388,-0.010620117,-0.013069153,0.013748169,0.010894775,0.018630981,0.010597229,0.011238098,0.0390625,-0.066467285,-0.010673523,0.021072388,0.022918701,-0.007637024,-0.04937744,-0.04724121,-0.008262634,0.030212402,0.009681702,-0.0033130646,0.024383545,-0.0029582977,-0.017532349,-0.00831604,0.0027942657,0.0072402954,-0.017822266,-0.05731201,-0.015487671,0.006149292,-0.0012302399,-0.013572693,0.02583313,-0.034973145,-0.032562256,0.01146698,-0.046539307,-0.003211975,-0.011123657,-0.0026721954,0.023117065,-0.014343262,0.019958496,-0.0063552856,-0.055908203,0.010650635,0.00039100647,0.057495117,-0.05026245,0.02658081,-0.008781433,-0.0032596588,-0.007511139,0.009529114,0.022201538,0.03543091,0.0020179749,0.03378296,-0.024612427,0.05117798,-0.013801575,-0.000998497,0.0019550323,-0.03640747,-0.012687683,-0.023849487,-0.018936157,0.051116943,-0.026107788,-0.003780365,-0.041168213,-0.020980835,-0.019058228,-0.05166626,0.02507019,0.01638794,0.04827881,-0.031066895,0.0066223145,0.00459671,0.017456055,-0.0009870529,-0.029052734,-0.012641907,0.011138916,0.0184021,0.019714355,-0.032928467,-0.022415161,-0.011917114,0.007221222,-0.052886963,-0.035339355,0.008552551,0.0031757355,-0.014266968,0.006374359,-0.016677856,-0.013748169,-0.013656616,-0.03970337,-0.0038928986,-0.0045280457,0.026992798,0.005050659,-0.020645142,-0.0000962019,0.025878906,-0.023757935,0.02418518,-0.009002686,-0.013282776,-0.05706787,0.002632141,0.007347107,0.026641846,-0.016967773,-0.035186768,0.010635376,-0.020904541,-0.0524292,-0.0034503937,-0.00012290478,-0.010467529,0.01386261,-0.021881104,-0.023773193,0.00017797947,-0.029312134,-0.009155273,-0.0019464493,-0.0016345978,0.009170532,-0.0029640198,0.018447876,0.024856567,-0.029785156,-0.02558899,0.009353638,0.009239197,0.00035762787,0.03390503,0.043426514,-0.014595032,-0.023956299,-0.009223938,-0.0034770966,-0.0018033981,-0.041992188,0.017715454,-0.0103302,-0.0001231432,-0.005996704,0.004863739,-0.024642944,0.017227173,0.054138184,0.012741089,0.006778717,-0.0050201416,-0.009521484,0.021316528,0.03930664,-0.020965576,0.01234436,-0.045959473,0.028884888,-0.01537323,0.038848877,0.0059165955,0.02961731,-0.011383057,-0.031921387,0.0012674332,0.0015411377,0.014373779,-0.05014038,-0.014160156,-0.047576904,-0.0035877228,-0.01965332,-0.023391724,0.01084137,0.012832642,-0.022033691,-0.07232666,-0.009437561,0.058929443,0.005092621,0.02192688,-0.01235199,0.04824829,0.022583008,-0.013305664,-0.02027893,0.014930725,-0.045776367,0.004486084,-0.026306152,0.028686523,-0.016937256,-0.021636963,0.009567261,0.0019407272,0.026443481,-0.0049438477,0.020980835,-0.022216797,-0.0021400452,-0.011695862,0.007724762,-0.0098724365,-0.023498535,0.043395996,-0.026290894,0.041412354,0.02243042,0.025985718,0.004562378,0.019058228,0.025024414,-0.03692627,0.0076026917,0.036132812,0.018478394,0.031021118,-0.009849548,0.028533936,0.021820068,0.016433716,-0.003458023,-0.014175415,-0.0016050339,-0.033843994,-0.018707275,0.025863647,-0.0056152344,-0.019424438,-0.031311035,0.00075912476,0.0064353943,0.016677856,0.0030078888,-0.018981934,-0.013694763,-0.02204895,0.01411438,0.010910034,0.017196655,-0.017333984,0.015823364,0.01776123,0.025665283,-0.008865356,-0.004676819,0.0019760132,0.042297363,-0.00033807755,-0.009239197,0.014602661,0.020324707,0.027526855,-0.0030345917,0.022659302,-0.035217285,-0.03152466,0.0014848709,-0.008613586,0.004837036,-0.009971619,0.008148193,-0.001458168,-0.004753113,-0.0019817352,-0.043273926,-0.013404846,-0.013404846,-0.024765015,-0.0054626465,-0.0013780594,0.0059928894,0.011955261,0.012771606,0.009529114,-0.017547607,0.025360107,-0.0077552795,-0.015258789,0.027023315,0.037597656,-0.013092041,-0.03475952,0.0063285828,-0.025238037,-0.03869629,0.016830444,-0.0040664673,0.006767273,0.014564514,0.0027389526,-0.0059051514,0.021118164,0.029785156,-0.010688782,0.013908386,-0.00042915344,0.007549286,-0.0262146,0.025787354,-0.05215454,0.032348633,0.017486572,0.019226074,-0.0001770258,-0.013809204,-0.027664185,0.020004272,0.024719238,-0.013961792,0.026763916,0.0069732666,0.04156494,-0.0028629303,-0.0049057007,0.0051612854,-0.024780273,-0.024719238,0.0102005005,0.008140564,0.00044369698,0.0006656647,-0.024917603,-0.0032291412,-0.040863037,0.012130737,0.013656616,0.017974854,-0.04901123,-0.03781128,0.0039863586,-0.027420044,-0.04373169,0.0057144165,-0.0070877075,0.034423828,0.041656494,0.017486572,-0.0025863647,0.01914978,0.005306244,-0.030822754,-0.02507019,-0.002046585,-0.00541687,0.015022278,-0.02482605,0.033050537,0.06088257,-0.009925842,0.045288086,0.04611206,0.014411926,0.0037956238,0.008369446,-0.028427124,0.032470703,-0.019424438,0.0036697388,0.008460999,0.039916992,-0.030853271,0.029785156,-0.006702423,0.03552246,-0.032226562,0.021514893,0.08319092,0.027801514,-0.011276245,0.041748047,-0.0059051514,-0.010307312,-0.012931824,-0.017410278,0.053588867,-0.01586914,0.02935791,0.035217285,0.011268616,0.0028705597,0.0013437271,-0.008003235,-0.019805908,0.03704834,0.023117065,0.001364708,0.0012340546,-0.024841309,0.013580322,-0.03567505,-0.02166748,0.0028209686,-0.004135132,0.023880005,-0.0018491745,-0.0032253265,-0.01689148,0.012207031,-0.00315094,0.0101623535,-0.01272583,0.019012451,0.026489258,-0.010543823,0.02267456,-0.0027103424,0.019088745,-0.0061035156,-0.019760132,0.02027893,0.0345459,0.0016994476,-0.012283325,0.028457642,0.014015198,0.033843994,0.041503906,-0.03024292,-0.0043144226,0.036254883,0.0030078888,-0.014694214,0.032714844,0.02645874,0.016433716,0.041503906,0.04940796,0.02923584,-0.033477783,0.016021729,-0.00054073334,0.003730774,-0.019897461,-0.0035133362,0.012969971,-0.008987427,0.015960693,0.0054626465,-0.03842163,0.041015625,0.019622803,0.000104129314,0.0033130646,0.0074424744,0.021011353,-0.012290955,-0.010658264,0.006603241,-0.007549286,0.0098724365,0.021591187,0.036895752,-0.009132385,0.042663574,0.014701843,-0.021514893,-0.013977051,0.013671875,-0.03579712,-0.010292053,-0.0054359436,-0.019973755,-0.053131104,0.0064849854,-0.000053286552,0.010398865,0.012382507,-0.0037269592,-0.006023407,0.000025689602,0.031097412,0.019439697,-0.00642395,-0.0037174225,-0.010467529,0.013748169,0.033935547,-0.006286621,-0.002691269,-0.0072402954,0.0038814545,0.016235352,0.00077438354,-0.02229309,-0.008308411,-0.0008215904,-0.029693604,0.014854431,0.029403687,0.019821167,0.05795288,-0.006855011,-0.02911377,-0.0032958984,0.030166626,0.007369995,-0.0066986084,0.0017595291,-0.0000015497208,-0.034301758,0.041046143,0.02772522,0.011558533,0.026809692,-0.013114929,-0.017303467,-0.011299133,0.0050315857,0.031219482,-0.0040740967,0.0013227463,-0.005542755,0.02494812,-0.02633667,-0.03753662,-0.00831604,-0.029785156,-0.042144775,-0.030776978,0.01763916,0.0038490295,0.02507019,0.031173706,0.027038574,-0.018981934,0.06317139,-0.02229309,0.033996582,-0.014266968,-0.0007481575,0.054534912,0.023986816,0.03918457,-0.0066452026,-0.0012350082,-0.029434204,0.0021572113,0.017532349,0.008239746,0.025482178,-0.006313324,-0.012260437,0.023788452,-0.011924744,0.014678955,0.0036125183,-0.003522873,0.009338379,-0.021240234,-0.01663208,-0.010757446,0.008972168,0.017288208,0.037719727,-0.009742737,0.0051231384,-0.02973938,-0.011520386,0.034362793,0.009857178,0.019134521,0.00818634,-0.026412964,0.028961182,-0.011054993,-0.02772522,-0.0008149147,0.023086548,-0.08288574,-0.009880066,0.013801575,0.00919342,-0.025161743,0.04345703,0.0044822693,0.0004017353,0.012786865,0.039794922,-0.008407593,0.05404663,-0.0131073,0.04269409,0.02557373,0.010818481,-0.015525818,0.024261475,0.018249512,-0.012031555,0.014518738,0.04827881,0.00029325485,0.033477783,-0.0018396378,0.004032135,0.008155823,0.006881714,-0.018844604,0.0034809113,-0.0076675415,-0.010543823,0.012069702,0.01486969,-0.011619568,-0.011482239,0.007686615,-0.015991211,-0.0034332275,0.047088623,0.01612854,-0.046173096,0.020095825,0.0047569275,-0.00623703,-0.0184021,-0.010795593,-0.0023593903,-0.0423584,-0.004272461,0.026031494,0.0030879974,0.017105103,-0.03173828,-0.00090169907,0.02545166,0.020584106,0.046783447,0.016098022,-0.008773804,0.018157959,-0.006664276,-0.00579834,-0.017181396,0.002943039,0.018692017,0.012207031,0.006465912,-0.021133423,0.016967773,-0.016571045,0.009819031,0.014884949,0.012207031,0.022918701,-0.012969971,0.005718231,0.020614624,0.031051636,-0.01436615,-0.03024292,-0.0063972473,0.016098022,0.0803833,-0.012023926,0.009895325,0.010726929,0.019851685,0.014076233,0.03515625,0.017730713,0.023849487,0.027877808,-0.0005784035,-0.01687622,0.028076172,-0.004638672,-0.024246216,0.03366089,-0.027420044,-0.01524353,0.028778076,0.028686523,0.019683838,-0.03967285,-0.01436615,-0.034301758,-0.035888672,0.0069503784,-0.015335083,0.014213562,-0.022949219,-0.0082092285,0.02961731,-0.011932373,-0.012016296,-0.023330688,-0.0038051605,-0.01158905,-0.053466797,0.001168251,-0.030197144,-0.00030994415,-0.026947021,0.019195557,-0.0025463104,0.02658081,-0.0019950867,0.0014123917,-0.008926392,0.022140503,0.007205963,0.02230835,0.022888184,-0.014328003,-0.022369385,-0.020385742,-0.00009638071,-0.009902954,0.031311035,-0.036010742,0.007827759,0.018844604,-0.018966675,-0.0044784546,0.0039405823,-0.022537231,-0.016342163,-0.019714355,-0.0044403076,0.010826111,0.021514893,-0.0015573502,-0.0037517548,0.03189087,-0.028701782,-0.022247314,0.015991211,0.03793335,0.018661499,0.037902832,-0.0104522705,0.016098022,-0.047454834,-0.0014848709,-0.017837524,0.007331848,0.010620117,-0.0008568764,-0.0037269592,0.013786316,0.011581421,-0.005218506,0.0046691895,0.04171753,0.029434204,0.0063171387,0.026138306,-0.009757996,0.0076179504,-0.038726807,-0.014053345,0.019256592,0.033233643,0.009506226,0.0044937134,-0.015220642,0.0031852722,-0.0124435425,0.0236969,0.020004272,-0.01499176,-0.042755127,-0.018432617,-0.017929077,0.008628845,0.0027561188,0.0061187744,-0.0015249252,0.011024475,-0.019577026,-0.021057129,-0.03253174,0.03945923,-0.0026988983,-0.022277832,-0.007659912,0.018478394,0.012893677,-0.027038574,-0.010414124,-0.06616211,-0.020431519,-0.025939941,-0.015388489,0.013092041,-0.012413025,0.010131836,-0.008659363,-0.00844574,-0.010856628,0.022277832,0.01285553,-0.017562866,-0.006881714,0.022644043,0.021087646,-0.009536743,0.016998291,-0.0031414032,-0.0028915405,0.004470825,0.0006570816,0.004837036,-0.021514893,0.031677246,0.028701782,-0.0028762817,0.032409668,-0.007484436,0.030639648,-0.012191772,0.0033168793,-0.01739502,-0.019683838,0.034301758,-0.017852783,-0.022506714,-0.002412796,-0.0011930466,-0.029312134,0.011100769,0.016235352,0.012680054,-0.017745972,0.046813965,0.0062675476,-0.014312744,0.02218628,0.02961731,-0.016174316,0.008918762,0.023132324,-0.010375977,-0.0031147003,-0.005508423,-0.012138367,-0.02003479,-0.02986145,-0.012390137,-0.019561768,0.0015077591,0.0041618347,0.019714355,0.040283203,0.005924225,0.014251709,0.03036499,0.018630981,0.023727417,-0.0039482117,0.03540039,0.017425537,-0.025299072,0.0064315796,0.014656067,-0.00374794,-0.0028152466,-0.004032135,0.01977539,-0.016204834,-0.008598328,0.02166748,0.030410767,0.012588501,0.025909424,-0.00084352493,0.00029540062,-0.040039062,0.0010700226,-0.028030396,0.005088806,0.031707764,0.021728516,0.020721436,-0.000467062,-0.025650024,0.015625,0.029159546,-0.013824463,-0.028884888,-0.009674072,0.013153076,-0.003665924,0.014328003,0.012374878,-0.012535095,-0.017684937,-0.015136719,-0.01235199,0.010177612,-0.012298584,0.02041626,0.010566711,-0.012687683,-0.019104004,0.027191162,-0.005332947,-0.016403198,0.009025574,-0.00566864,0.025100708,0.024276733,-0.023727417,0.0022201538,0.032714844,-0.032470703,0.055847168,0.0058631897,0.00680542,-0.0048561096,-0.0071640015,-0.034698486,-0.00018537045,-0.010475159,-0.01448822],"createdAt":"2026-04-18T18:53:12.130Z","updatedAt":"2026-04-27T20:08:58.517Z","lastSeenAt":"2026-04-27T20:08:58.517Z","tsv":"'/api':146 '/api/v1/portfolios/62/transactions':44 '/docs':145 '/pricing':147 '/readme':149 '0.02':95,117 '000':100 '1':85 '20':99 '402':190 '6':104 'Base network API' 'USDC micropayment API' 'accept':179 'access':34 'across':120 'address':111 'advertis':114 'ai/ml':66 'analyt':65 'api':61,126 'base':8,22,88,101 'base-network' 'beyond':137 'bodi':200 'broader':50 'call':12,26,91 'challeng':191 'commit':134 'confirm':185 'connect':155 'content':161 'cost':92 'crypto payment endpoint' 'data':38,64,69,206 'decim':105 'descript':172 'design':109 'document':136,194 'endpoint':6,20,30,62,75,123,178,183 'exampl':169 'expect':202 'extrem':142 'field':175 'finance/web3':68 'flat':116 'gate':3,17,79 'infer':67 'infrastructur':71 'key':127 'land':139 'limit':130 'live':186 'lowpaymentfee' 'lowpaymentfee.com':32,52 'maxamountrequir':97 'minimum':133 'network':89 'offer':54 'openapi':165 'page':140,150 'paid':9,23 'part':47 'pay-per-call API' 'payabl':60 'per':11,25,118 'per-cal':10,24 'per-call-pricing' 'platform':51,113 'portfolio':4,18,36 'portfolio transactions API' 'portfolio-transactions' 'post':41 'post-endpoint' 'probe':76 'prompt':157 'proper':189 'protocol':83 'provid':33 'rate':129 'render':152 'request':42,119,199 'request/response':168 'requir':135 'return':181,187,208 'schema':166 'settl':106 'span':63 'spars':143 'specif':74 'transact':5,19,37,177,205 'unclear':197 'unit':102 'usdc':14,28,96 'usdc-settlement' 'util':72 'varieti':56 'version':84 'via':39 'wallet':110,156 'without':193 'x402':2,16,59,82 'x402 paid API' 'x402-gated':1,15 'x402-payable':58 'x402-payment'","prices":[{"id":"a26f5700-64dd-4fb7-83e1-924b82e0b886","listingId":"0b30c67e-8870-4293-9684-e3d39bd25e37","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/62/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:12.130Z"}],"sources":[{"listingId":"0b30c67e-8870-4293-9684-e3d39bd25e37","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/62/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:12.130Z","lastSeenAt":"2026-04-27T20:08:58.517Z"}],"details":{"listingId":"0b30c67e-8870-4293-9684-e3d39bd25e37","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/62/transactions \\\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 402 challenge with x402Version 1, maxAmountRequired 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/62/transactions"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/portfolios/62/transactions"}],"useCases":["Retrieving portfolio transaction history via a pay-per-call model","Integrating portfolio data into agent workflows without API key management","Programmatic access to transaction records settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-request portfolio data access","AI agents that can settle x402 payments on Base","Users who prefer micropayment-based API access over subscription models"],"notFor":["Users who need detailed API documentation or schema before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone needing non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:59.028Z"},"updatedAt":"2026-04-27T20:08:58.517Z"}}