{"id":"48ff9469-7968-4e05-a4d6-89dd23b526ca","shortId":"KnAjww","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/46/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC.\n\nThe specific endpoint probed here charges up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is handled via the x402 protocol: callers receive a 402 challenge with payment details, attach an `X-PAYMENT` header with a signed payment, and the server fulfills the request. No API keys or accounts are required; access is instant once payment is provided. The platform advertises no rate limits and no minimum commitments.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the `/portfolios/46/transactions` endpoint actually returns. The endpoint appears to be live (402 challenge captured successfully), but the lack of documentation makes it difficult to determine the exact input format or output structure.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","portfolio-transactions","per-call-pricing","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["portfolio transactions API","x402 finance endpoint","USDC pay-per-call API","Base network API","lowpaymentfee","crypto portfolio data","transaction history API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; input and output formats are unknown.","The endpoint path references a hardcoded portfolio ID (46), which may indicate a demo or placeholder rather than a general-purpose API.","The broader platform lists many API categories but it is unclear which are actually functional."],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/46/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/46/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The purpose of this specific endpoint (portfolios/46/transactions) is not explained anywhere.","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":"2026-04-19T08:36:10.663Z","embedding":[-0.02848816,-0.014984131,0.027938843,0.0050468445,0.0057640076,-0.021026611,-0.022567749,0.010528564,0.06817627,-0.060150146,0.024490356,-0.04815674,-0.039886475,-0.042236328,-0.0049362183,0.007434845,0.0099487305,0.010559082,-0.06359863,0.045562744,0.043914795,-0.04272461,-0.009857178,0.022903442,-0.024276733,-0.0069847107,-0.019638062,-0.01197052,-0.04119873,-0.020874023,0.03717041,-0.02027893,-0.010147095,0.007507324,-0.027938843,0.01802063,0.006855011,0.051483154,0.036071777,-0.01171875,0.036621094,-0.04269409,0.0043640137,-0.022567749,-0.017364502,-0.0034484863,0.023651123,-0.04067993,0.032165527,0.0064582825,-0.037322998,-0.0124053955,-0.0073661804,0.022521973,0.0234375,0.008003235,0.022628784,-0.0151901245,0.009429932,0.022125244,0.0018987656,-0.05734253,0.005908966,-0.0027313232,0.007762909,0.036865234,-0.026870728,0.05795288,-0.015350342,0.07824707,0.016998291,0.03466797,0.03253174,0.009376526,0.0005106926,-0.014030457,-0.014801025,0.033843994,-0.012931824,-0.041870117,-0.006790161,-0.002527237,-0.06817627,-0.012069702,-0.018844604,-0.05114746,-0.0129470825,0.010131836,-0.04736328,0.03567505,-0.07757568,0.014846802,0.0028800964,0.020141602,-0.014343262,-0.0234375,0.0019817352,0.028015137,-0.006664276,0.019561768,0.022628784,-0.023345947,0.022018433,0.005088806,0.05633545,0.025238037,0.011917114,0.045440674,-0.020751953,-0.019348145,-0.031219482,-0.0093688965,-0.006767273,0.0211792,0.0052948,-0.01802063,-0.025756836,0.030548096,-0.015022278,0.031555176,-0.060455322,0.029190063,0.01335907,0.0034923553,0.018737793,-0.0395813,-0.014511108,0.0070991516,-0.03552246,-0.027389526,0.031311035,0.008300781,-0.0007171631,-0.018081665,-0.013519287,0.013404846,-0.032226562,-0.009094238,-0.052825928,-0.016677856,0.024215698,-0.03378296,0.037261963,0.027694702,-0.10662842,0.023849487,-0.02357483,0.055725098,-0.013458252,-0.017227173,0.016326904,0.017196655,-0.0023612976,-0.014045715,0.008392334,-0.04623413,-0.013069153,0.030441284,0.004951477,0.041992188,-0.0024719238,0.031280518,0.021865845,0.019302368,0.015777588,0.027236938,0.00050497055,-0.06329346,-0.070129395,-0.025039673,0.02848816,-0.03552246,-0.010093689,0.0063667297,-0.010848999,-0.10028076,-0.030090332,-0.0031490326,-0.0067214966,-0.042022705,-0.023529053,-0.035614014,0.011528015,-0.024017334,-0.062683105,-0.0027694702,-0.019714355,0.04208374,0.008018494,0.021224976,0.033843994,0.007820129,0.043518066,0.039489746,-0.017211914,-0.02557373,0.004928589,0.009407043,0.018188477,-0.014030457,0.028671265,-0.02217102,0.028915405,0.061157227,-0.008590698,-0.024429321,0.025054932,-0.06304932,-0.037139893,-0.02708435,0.026885986,0.002527237,-0.028137207,0.020446777,-0.0016355515,-0.028915405,0.011230469,0.029678345,0.01209259,0.056884766,0.023162842,0.017562866,0.022033691,0.003774643,-0.020431519,0.05429077,0.032409668,0.008514404,-0.0054473877,-0.057800293,0.021774292,0.026412964,-0.03074646,-0.009475708,0.0048446655,0.00712204,-0.020095825,-0.017623901,0.024230957,-0.014663696,-0.0021438599,-0.029251099,-0.0046424866,0.015235901,0.000831604,-0.015396118,-0.036102295,-0.08282471,0.034729004,0.052368164,0.019165039,-0.0011672974,-0.0073661804,-0.017410278,-0.014663696,-0.058135986,0.03237915,0.054382324,-0.013648987,-0.021972656,0.03225708,-0.016708374,-0.026168823,-0.014167786,-0.02859497,-0.01979065,-0.019805908,-0.003604889,-0.050689697,0.021514893,0.023864746,0.022445679,0.024398804,-0.009292603,-0.07104492,-0.016616821,-0.021224976,0.01979065,-0.038726807,-0.02796936,0.030380249,0.028717041,0.0048942566,0.03286743,0.013710022,-0.0047569275,0.018600464,0.013534546,0.016143799,-0.00081443787,-0.014724731,0.023071289,0.016494751,-0.057678223,0.021011353,-0.011917114,0.038604736,-0.04156494,0.04119873,-0.023025513,0.023712158,0.026412964,-0.019622803,-0.062683105,0.014457703,0.007259369,0.02015686,0.035217285,-0.011016846,0.0016870499,-0.03265381,0.064819336,-0.01335907,-0.020355225,0.022628784,0.025985718,0.038635254,-0.0013427734,-0.059753418,-0.025344849,-0.0066833496,-0.026412964,0.04675293,-0.008163452,0.01512146,0.0019836426,0.0028934479,-0.023849487,-0.008956909,-0.019485474,-0.005584717,-0.027572632,-0.007820129,-0.015197754,-0.00793457,0.022659302,-0.005584717,0.00049066544,0.014274597,0.031585693,0.010810852,0.0029315948,-0.022323608,-0.024963379,0.00022363663,-0.023712158,0.026947021,0.03945923,0.012107849,0.016784668,-0.009140015,-0.018798828,0.024414062,0.020980835,0.042755127,0.0045394897,-0.012908936,-0.04711914,-0.06359863,-0.027114868,-0.016586304,0.02696228,0.028335571,0.0034923553,0.026794434,0.020904541,-0.016662598,-0.04272461,0.034606934,-0.034942627,0.020355225,0.040771484,-0.011627197,-0.024017334,0.0079422,0.0079193115,-0.004776001,0.03338623,0.016830444,0.015449524,0.039215088,0.026809692,0.01399231,0.0064849854,0.009590149,0.0107040405,-0.011787415,-0.010635376,-0.027740479,-0.02609253,0.0037212372,-0.017837524,-0.031082153,-0.075683594,0.032806396,0.027740479,0.094177246,0.03262329,0.018966675,0.0047416687,-0.019866943,-0.0041770935,-0.033203125,-0.025054932,-0.039733887,-0.053131104,0.025253296,0.009178162,0.03012085,-0.03643799,0.0440979,0.0046157837,0.011581421,-0.044891357,0.05709839,-0.03302002,-0.021499634,0.017349243,0.01448822,0.05432129,0.06994629,-0.027709961,0.03050232,0.03439331,-0.026367188,0.0029792786,0.033111572,-0.011184692,-0.02067566,-0.045959473,-0.039611816,0.00680542,-0.012756348,-0.02330017,-0.0038414001,0.01058197,0.04055786,0.0102005005,-0.0051460266,-0.025054932,0.026794434,0.01084137,-0.04736328,-0.014335632,-0.043548584,0.028823853,0.05331421,-0.009567261,-0.008911133,-0.01676941,-0.0090789795,0.016860962,0.021377563,-0.00919342,-0.003929138,-0.024871826,0.03552246,-0.008300781,0.017150879,0.014694214,0.029541016,0.032989502,0.00019025803,0.03579712,0.029342651,-0.023880005,-0.06945801,-0.0021305084,-0.06188965,-0.004207611,0.035461426,-0.031082153,-0.006565094,-0.020492554,-0.033691406,0.020202637,0.002483368,-0.0289917,0.0006775856,0.0020542145,-0.016494751,-0.03817749,-0.06124878,-0.02571106,0.016052246,0.07434082,0.025390625,0.004360199,-0.029891968,-0.008354187,0.033477783,-0.004688263,0.028045654,-0.013343811,-0.015350342,-0.010246277,-0.039642334,-0.029464722,-0.0077705383,0.032104492,-0.0017681122,-0.008636475,0.011436462,-0.010009766,0.01537323,-0.013572693,-0.016235352,0.019515991,-0.0006804466,0.009994507,-0.0026111603,0.049835205,0.0007157326,-0.046539307,-0.05618286,0.020996094,-0.01071167,0.035369873,-0.032409668,-0.022277832,0.018478394,0.007675171,-0.016860962,-0.032714844,0.009300232,0.005203247,-0.03677368,-0.06298828,0.04559326,-0.01448822,0.013244629,0.018508911,-0.0007171631,0.02116394,-0.02079773,0.01424408,-0.0012874603,-0.026489258,-0.032348633,-0.05609131,-0.04019165,-0.036743164,-0.013748169,-0.03704834,0.028198242,-0.020141602,0.033050537,-0.0158844,-0.033447266,0.036071777,0.01890564,0.017211914,0.021362305,-0.0065841675,0.008125305,0.035888672,0.00573349,-0.037353516,0.02432251,-0.0049476624,0.000038921833,0.0008840561,0.052825928,-0.0002310276,-0.007801056,0.027923584,-0.011726379,-0.020996094,-0.02645874,-0.013572693,0.0042762756,0.019378662,-0.0036125183,-0.027923584,0.033416748,0.008155823,-0.0395813,-0.05596924,0.012908936,0.028762817,-0.034484863,0.023803711,0.007785797,0.04574585,-0.033935547,0.023117065,0.010002136,0.0473938,0.028121948,0.006778717,0.0024700165,0.018203735,-0.013282776,0.010528564,0.008598328,-0.0059814453,-0.000072956085,-0.0050201416,0.028121948,0.0012969971,0.01927185,-0.02218628,-0.027770996,0.014823914,-0.00818634,-0.021835327,0.020126343,0.009017944,0.02394104,-0.0034561157,0.033081055,0.031463623,-0.015220642,-0.013832092,-0.012664795,0.025787354,0.019470215,0.031829834,0.0027275085,0.0072746277,0.030151367,-0.06149292,-0.0065460205,0.019134521,0.019958496,-0.0007019043,-0.054718018,-0.041107178,-0.0054893494,0.029342651,0.0006661415,0.00029587746,0.021774292,0.0052986145,-0.01071167,-0.010284424,0.005680084,-0.0010900497,-0.020492554,-0.056274414,-0.011405945,0.010070801,0.0033836365,-0.0074691772,0.023254395,-0.035858154,-0.02758789,0.018936157,-0.046295166,-0.0044555664,-0.012138367,0.0013198853,0.02116394,-0.011482239,0.014625549,-0.00868988,-0.046203613,0.019729614,-0.0119018555,0.06878662,-0.046966553,0.02557373,-0.015037537,-0.014045715,-0.0070495605,0.0121154785,0.023391724,0.025375366,0.008018494,0.03692627,-0.032684326,0.04714966,-0.019165039,0.0030059814,-0.0012407303,-0.042999268,-0.019561768,-0.019577026,-0.014205933,0.046936035,-0.024307251,-0.013969421,-0.04525757,-0.01979065,-0.01348114,-0.053833008,0.025863647,0.017684937,0.0413208,-0.030426025,0.0006556511,0.004787445,0.012809753,-0.004547119,-0.032165527,-0.013656616,0.013320923,0.011016846,0.018005371,-0.031219482,-0.008903503,-0.016220093,0.0055236816,-0.048614502,-0.044036865,0.008766174,0.012313843,-0.027313232,0.00856781,-0.01651001,-0.0131073,-0.005176544,-0.040100098,-0.0040626526,-0.002298355,0.029022217,0.0010957718,-0.013908386,-0.00907135,0.021759033,-0.019104004,0.018188477,-0.004722595,-0.014694214,-0.047210693,-0.002937317,0.0019330978,0.039123535,-0.018920898,-0.027664185,0.0017461777,-0.020843506,-0.052886963,-0.0009965897,0.007820129,-0.013046265,0.012451172,-0.022003174,-0.029846191,0.00069236755,-0.036712646,-0.01939392,0.0036392212,-0.008842468,0.01625061,-0.0076942444,0.012741089,0.031402588,-0.0146102905,-0.021774292,0.011680603,0.009056091,0.005683899,0.029251099,0.040252686,-0.018249512,-0.011962891,-0.010498047,-0.0015487671,0.000012814999,-0.04309082,0.02116394,-0.0049362183,0.00409317,-0.011009216,0.015296936,-0.03387451,0.021118164,0.05307007,0.0076179504,0.0035152435,-0.0044822693,-0.018707275,0.018478394,0.044006348,-0.02230835,0.017120361,-0.046905518,0.024490356,-0.020126343,0.04434204,0.007209778,0.03237915,-0.016540527,-0.031585693,-0.0040893555,-0.0014743805,0.008003235,-0.048980713,-0.013870239,-0.044281006,-0.010658264,-0.02758789,-0.019927979,0.012878418,0.015510559,-0.022842407,-0.07299805,-0.0076942444,0.060394287,0.009094238,0.016036987,-0.010986328,0.049102783,0.025604248,-0.018249512,-0.013046265,0.008804321,-0.04824829,-0.0014257431,-0.024749756,0.027862549,-0.014312744,-0.02470398,0.012161255,-0.0020122528,0.024307251,-0.007774353,0.032104492,-0.02015686,0.0007891655,-0.013786316,0.002702713,-0.01675415,-0.031921387,0.04437256,-0.023025513,0.044677734,0.026916504,0.026489258,-0.006839752,0.025756836,0.03314209,-0.0395813,0.0059280396,0.030670166,0.015945435,0.021484375,-0.013931274,0.03012085,0.029876709,0.026306152,-0.011505127,-0.015045166,-0.0051116943,-0.028442383,-0.022994995,0.022247314,-0.0030269623,-0.027572632,-0.027893066,0.0061912537,-0.0009446144,0.017303467,-0.0056915283,-0.023239136,-0.013381958,-0.019515991,0.005859375,0.014183044,0.010749817,-0.01247406,0.020767212,0.011566162,0.024871826,-0.006198883,-0.002363205,0.011390686,0.037078857,0.00048446655,-0.009109497,0.018005371,0.02571106,0.031463623,-0.0028858185,0.02204895,-0.047027588,-0.028564453,-0.004009247,-0.0042304993,0.0031719208,-0.009223938,0.011856079,-0.013519287,-0.0042533875,-0.004211426,-0.03756714,-0.017745972,-0.01675415,-0.02659607,-0.00881958,-0.0039024353,-0.00012910366,0.010803223,0.010131836,0.0052833557,-0.019073486,0.020767212,-0.010864258,-0.010261536,0.026184082,0.03137207,-0.015731812,-0.040893555,0.0039749146,-0.018554688,-0.036315918,0.011772156,-0.0030117035,0.0060691833,0.014961243,0.005935669,-0.0036582947,0.014320374,0.037963867,-0.023345947,0.02418518,-0.0018968582,0.011497498,-0.033172607,0.021881104,-0.047424316,0.033843994,0.022369385,0.019638062,0.003768921,-0.011138916,-0.023498535,0.019622803,0.022384644,-0.0064849854,0.0234375,0.013893127,0.04751587,-0.0032920837,-0.008285522,-0.0019073486,-0.01965332,-0.025375366,0.0104904175,0.010803223,0.0012388229,0.0060310364,-0.033569336,-0.0068740845,-0.04598999,0.01399231,0.016296387,0.022476196,-0.046142578,-0.032928467,-0.008071899,-0.022323608,-0.049316406,0.005622864,-0.009300232,0.036956787,0.03805542,0.014259338,0.0002617836,0.014587402,0.013046265,-0.028366089,-0.022232056,-0.0078125,-0.008934021,0.021270752,-0.014450073,0.034362793,0.06225586,-0.0019741058,0.042541504,0.04284668,0.011604309,0.0053749084,0.010635376,-0.021881104,0.03201294,-0.009651184,0.013786316,0.010765076,0.03164673,-0.016204834,0.027511597,0.0001436472,0.027267456,-0.0340271,0.019363403,0.080444336,0.029769897,-0.013282776,0.0413208,-0.008865356,-0.014671326,-0.0149002075,-0.01612854,0.057495117,-0.018310547,0.024337769,0.04437256,0.009468079,-0.002325058,-0.00434494,-0.0006990433,-0.025054932,0.046813965,0.029296875,-0.0011348724,-0.0112838745,-0.016708374,0.019500732,-0.04547119,-0.017623901,0.0058059692,-0.006134033,0.024398804,0.0024642944,0.00088882446,-0.024719238,0.011581421,0.003768921,0.006351471,-0.015701294,0.028945923,0.028335571,0.0013570786,0.017868042,-0.0026493073,0.01737976,-0.0049095154,-0.017929077,0.021240234,0.04055786,0.0066337585,-0.010536194,0.03302002,0.0017528534,0.03579712,0.03265381,-0.023788452,-0.0035305023,0.031341553,0.004211426,-0.012397766,0.038604736,0.031982422,0.014198303,0.049102783,0.044708252,0.024215698,-0.034973145,0.01486969,-0.0053749084,0.004611969,-0.019134521,-0.006439209,0.021469116,-0.00945282,0.013824463,-0.0014410019,-0.03265381,0.033721924,0.021194458,-0.004989624,-0.005706787,-0.0043182373,0.03062439,-0.02368164,-0.019119263,0.0042304993,-0.0014696121,0.014511108,0.022613525,0.033569336,-0.013084412,0.037261963,0.014007568,-0.018615723,-0.017745972,0.015327454,-0.039276123,-0.011604309,-0.010101318,-0.02053833,-0.052368164,0.0057525635,-0.000077307224,0.012771606,0.010398865,0.0009946823,-0.0013551712,-0.0027999878,0.030395508,0.014045715,-0.013648987,0.00019955635,-0.008308411,-0.0004284382,0.035339355,-0.0064964294,0.0017089844,-0.008926392,-0.006198883,0.015548706,-0.008460999,-0.019439697,-0.009963989,-0.0017538071,-0.021118164,0.011299133,0.033447266,0.012199402,0.06488037,-0.01361084,-0.028549194,-0.004550934,0.02722168,0.0013484955,-0.006790161,0.0017118454,-0.00491333,-0.035858154,0.04058838,0.034973145,0.007217407,0.033843994,-0.0070495605,-0.01940918,-0.012077332,0.004432678,0.028167725,-0.00617218,-0.0046081543,-0.0032424927,0.03149414,-0.024154663,-0.03265381,-0.0027275085,-0.03439331,-0.036468506,-0.024902344,0.012336731,0.0007715225,0.01914978,0.024810791,0.027511597,-0.015472412,0.062194824,-0.026489258,0.035247803,-0.018463135,-0.00084638596,0.048065186,0.021255493,0.040924072,-0.007472992,-0.0026359558,-0.03387451,-0.002790451,0.019592285,0.012702942,0.023513794,-0.0061912537,-0.013969421,0.019760132,-0.005290985,0.02041626,0.007537842,0.0029449463,0.011230469,-0.02809143,-0.006427765,-0.013206482,0.00919342,0.017333984,0.040496826,-0.012161255,0.01158905,-0.034118652,-0.008674622,0.02041626,0.010032654,0.011138916,0.0023822784,-0.01940918,0.02368164,-0.014862061,-0.023925781,0.004787445,0.019515991,-0.08508301,-0.012893677,0.014457703,0.0057678223,-0.02267456,0.04156494,0.0041236877,-0.007160187,0.013946533,0.039855957,-0.009994507,0.03982544,-0.005016327,0.054626465,0.03265381,0.0055618286,-0.009986877,0.018341064,0.028869629,-0.018539429,0.018737793,0.04812622,-0.0056381226,0.025466919,-0.01247406,0.004108429,0.002248764,0.005859375,-0.017593384,-0.0018577576,-0.0018415451,-0.0067596436,0.011703491,0.017837524,-0.009635925,-0.015365601,-0.007648468,-0.01084137,0.0029029846,0.047027588,0.015113831,-0.039489746,0.014022827,0.00018239021,-0.007549286,-0.007610321,-0.011772156,0.0038757324,-0.045654297,0.004463196,0.023345947,0.0024032593,0.016098022,-0.029251099,-0.008766174,0.02696228,0.01486969,0.04724121,0.022735596,-0.007926941,0.014808655,-0.008605957,-0.0037059784,-0.01235199,0.0011053085,0.013679504,0.00025773048,0.008842468,-0.016540527,0.012825012,-0.014511108,0.007987976,0.017028809,0.009918213,0.017242432,-0.012954712,-0.00806427,0.016921997,0.032104492,-0.013069153,-0.028320312,-0.0073928833,0.013053894,0.07720947,-0.010879517,0.008735657,0.021896362,0.02671814,0.019546509,0.04196167,0.023834229,0.03466797,0.024505615,-0.009140015,-0.00818634,0.027572632,-0.003501892,-0.02482605,0.027297974,-0.02394104,-0.018737793,0.03213501,0.029541016,0.016433716,-0.043395996,-0.011222839,-0.03062439,-0.038635254,0.0034236908,-0.018722534,0.004802704,-0.015899658,-0.018600464,0.020980835,-0.007423401,-0.012069702,-0.016845703,0.0017757416,-0.011070251,-0.05682373,-0.010116577,-0.027313232,0.0018901825,-0.028121948,0.01285553,0.004119873,0.020324707,-0.0056495667,-0.0031375885,-0.0036087036,0.012969971,0.011138916,0.021499634,0.022445679,-0.020462036,-0.025665283,-0.02696228,0.0043563843,-0.0115737915,0.037994385,-0.03137207,0.0056037903,0.024810791,-0.013542175,-0.0070114136,0.002286911,-0.011550903,-0.013473511,-0.022949219,-0.0012645721,0.009597778,0.020858765,-0.0011510849,-0.009246826,0.034088135,-0.029968262,-0.022827148,0.0118255615,0.042510986,0.021316528,0.034820557,-0.011329651,0.018630981,-0.055725098,-0.0034122467,-0.017166138,0.00919342,0.0107803345,-0.0024986267,0.0012807846,0.0038414001,0.011787415,-0.0075416565,0.0041618347,0.04916382,0.024551392,0.009490967,0.0262146,-0.013710022,-0.00040960312,-0.03579712,-0.018585205,0.016220093,0.036376953,0.011520386,0.014533997,-0.017486572,-0.0042533875,-0.014457703,0.015350342,0.020492554,-0.012397766,-0.044067383,-0.017578125,-0.016036987,0.01448822,0.012771606,-0.0031871796,-0.004398346,0.010940552,-0.017730713,-0.030273438,-0.037475586,0.041046143,-0.0013942719,-0.020965576,-0.0035171509,0.018722534,0.013969421,-0.017715454,-0.002998352,-0.06378174,-0.015235901,-0.024612427,-0.0069618225,0.017837524,-0.0076675415,0.011314392,-0.008460999,-0.0073432922,-0.018371582,0.027770996,0.0072288513,-0.018371582,-0.008239746,0.018508911,0.029678345,-0.009536743,0.01625061,0.0020446777,0.003156662,-0.00023293495,-0.0052757263,0.0085372925,-0.030654907,0.020599365,0.020462036,-0.010948181,0.03805542,-0.016586304,0.029220581,-0.009246826,0.007762909,-0.017974854,-0.01486969,0.026992798,-0.016555786,-0.01878357,0.0024261475,0.000954628,-0.03338623,0.008758545,0.013969421,0.023269653,-0.010726929,0.046020508,-0.0031280518,-0.016601562,0.020095825,0.027297974,-0.018600464,0.0061683655,0.029525757,-0.010925293,-0.0051574707,-0.010658264,-0.017715454,-0.022094727,-0.031433105,-0.0039863586,-0.009498596,0.0055503845,0.010658264,0.021820068,0.045806885,0.008552551,0.010734558,0.029571533,0.008331299,0.026443481,0.0023517609,0.03390503,0.01637268,-0.028045654,0.011260986,-0.0029830933,-0.016952515,0.0049324036,-0.002407074,0.015945435,-0.01586914,0.00033140182,0.020263672,0.027420044,0.019195557,0.01576233,-0.0072669983,-0.0009469986,-0.045013428,-0.0051841736,-0.031585693,0.004295349,0.034606934,0.016281128,0.0184021,0.002368927,-0.01663208,0.018737793,0.02357483,-0.012245178,-0.025100708,-0.0053215027,0.022109985,-0.004676819,0.026687622,0.01398468,-0.01600647,-0.016082764,-0.009017944,-0.007537842,0.010345459,-0.017837524,0.021270752,0.008903503,-0.015075684,-0.030899048,0.024169922,-0.00020480156,-0.007091522,0.00983429,-0.0013313293,0.026885986,0.018310547,-0.020614624,0.017456055,0.021392822,-0.040222168,0.052520752,0.007873535,0.011222839,-0.0034732819,-0.0056533813,-0.03918457,0.000084757805,-0.0034294128,-0.011451721],"createdAt":"2026-04-18T18:52:57.794Z","updatedAt":"2026-04-27T22:33:21.525Z","lastSeenAt":"2026-04-27T22:33:21.525Z","tsv":"'/api/v1/portfolios/46/transactions':44 '/portfolios/46/transactions':199 '0.02':88,103 '000':94 '20':93 '402':114,209 '6':101 'Base network API' 'USDC pay-per-call API' 'access':34,142 'account':139 'actual':201 'advertis':151 'ai/ml':65 'analyt':64 'api':61,136,168 'appear':205 'attach':119 'base':8,22,76,95 'base-network' 'broader':50 'call':12,26 'caller':111 'captur':211 'challeng':115,210 'charg':85 'commit':158 'connect':177 'content':183 'crypto portfolio data' 'data':38,63,68 'decim':102 'descript':195 'detail':118,194 'determin':222 'difficult':220 'doc':167 'document':159,217 'endpoint':6,20,30,82,200,204 'exact':224 'exampl':191 'extrem':164 'finance/web3':67 'format':226 'fulfil':132 'gate':3,17,60 'handl':106 'header':124 'infer':66 'infrastructur':70 'input':225 'instant':144 'key':137 'lack':215 'limit':154 'live':208 'lowpaymentfee' 'lowpaymentfee.com':32,52 'make':218 'maxamountrequir':91 'minimum':157 'network':77 'no-api-key' 'offer':54 'openapi':187 'output':228 'page':172 'paid':9,23 'part':47 'payment':104,117,123,128,146 'per':11,25,89 'per-cal':10,24 'per-call-pricing' 'platform':51,150 'portfolio':4,18,36 'portfolio transactions API' 'portfolio-transactions' 'post':41 'post-method' 'price':169 'probe':83 'prompt':179 'protocol':110 'provid':33,148 'rate':153 'readm':171 'receiv':112 'render':174 'request':42,90,134 'request/response':190 'requir':141 'return':202 'schema':188 'server':131 'settl':73 'sign':127 'site':162 'span':62 'spars':165 'specif':81 'structur':229 'substant':182 'success':212 'transact':5,19,37 'transaction history API' 'unit':96 'usdc':14,28,79,98 'usdc-settlement' 'use':78 'util':71 'varieti':56 'via':39,107 'wallet':178 'x':122 'x-payment':121 'x402':2,16,59,109 'x402 finance endpoint' 'x402-gated':1,15,58 'x402-payment'","prices":[{"id":"13c18992-e526-4668-ac66-c3ef4fc1847d","listingId":"48ff9469-7968-4e05-a4d6-89dd23b526ca","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/46/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":"2026-04-18T18:52:57.794Z"}],"sources":[{"listingId":"48ff9469-7968-4e05-a4d6-89dd23b526ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/46/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:57.794Z","lastSeenAt":"2026-04-27T22:33:21.525Z"}],"details":{"listingId":"48ff9469-7968-4e05-a4d6-89dd23b526ca","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/46/transactions \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","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 maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/portfolios/46/transactions"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is used for payment on Base.","source_url":"https://lowpaymentfee.com/api/v1/portfolios/46/transactions"}],"useCases":["Retrieving transaction records for a specific portfolio","Integrating portfolio transaction data into automated trading or analytics pipelines","Agent-driven portfolio monitoring with per-call micropayments"],"bestFor":["Developers wanting keyless, pay-per-call access to portfolio transaction data","AI agents that can settle USDC payments on Base via x402","Users who prefer no-subscription, usage-based API pricing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Applications requiring non-crypto payment methods","High-volume batch retrieval where per-call pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:59.601Z"},"updatedAt":"2026-04-27T22:33:21.525Z"}}