{"id":"e0db2808-20be-48ff-98e1-b5377041b616","shortId":"SUJbFA","kind":"x402","title":"Pay-per-call portfolio transactions endpoint on Base via x402 (USDC, $0.02/request).","tagline":"Pay-per-call portfolio transactions endpoint on Base via x402 (USDC, $0.02/request).","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to portfolio transaction data via a POST request to `/api/v1/portfolios/17/transactions`. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs, all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nPayment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The x402 challenge specifies a `maxAmountRequired` of 20000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint uses the \"exact\" payment scheme with a 300-second timeout. No OpenAPI schema or detailed documentation was found for this specific endpoint beyond the x402 challenge metadata.\n\nThe specific endpoint listed here (`/portfolios/17/transactions`) appears to be a single portfolio's transaction resource. The broader platform advertises categories including analytics metrics, AI sentiment analysis, text summarization, finance price feeds, crypto gas estimates, geocoding, and more — all at the same $0.02 per-request price point. However, documentation pages returned only a \"Connect wallet\" prompt with no further technical detail, so the exact request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","portfolio-transactions","pay-per-call","no-api-key"],"categories":["finance","data"],"synonyms":["portfolio transactions API","x402 finance endpoint","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee","crypto portfolio data"],"warnings":["No OpenAPI or request/response schema available for this endpoint","Documentation pages (/docs, /api, /pricing, /README) all return only a 'Connect wallet' prompt with no technical content","The endpoint path references a hardcoded portfolio ID (17); unclear if other portfolio IDs are supported","The platform advertises many API categories but documentation is absent for all of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/17/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/17/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response documentation, and the docs/pricing/API pages all return only a 'Connect wallet' stub. The purpose of this specific endpoint (portfolios/17/transactions) is only inferable from the URL path.","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":"2026-04-19T08:19:38.762Z","embedding":[-0.020187378,-0.02810669,0.030151367,-0.00207901,-0.0066719055,-0.027496338,-0.019546509,0.013000488,0.071777344,-0.06506348,0.0178833,-0.04046631,-0.02029419,-0.04284668,-0.0011787415,0.015159607,0.014892578,0.0015735626,-0.059020996,0.045440674,0.017852783,-0.04498291,-0.018417358,0.01524353,-0.01687622,-0.02432251,-0.029251099,-0.00041341782,-0.037261963,-0.03262329,0.040222168,-0.02078247,-0.0058059692,0.010398865,-0.039794922,0.006580353,-0.005897522,0.043701172,0.028244019,-0.009475708,0.029006958,-0.053955078,0.012939453,-0.01878357,-0.02885437,0.000051140785,0.02128601,-0.042541504,0.04031372,0.012756348,-0.035369873,-0.018325806,0.014816284,0.0012989044,0.009109497,0.0013961792,0.03274536,-0.0011482239,-0.00037050247,0.023345947,0.005844116,-0.062072754,0.0021858215,-0.0015087128,0.002336502,0.048553467,-0.027511597,0.057617188,-0.0069465637,0.084350586,0.0074653625,0.04284668,0.018127441,0.017929077,-0.004699707,-0.034973145,-0.017425537,0.059020996,-0.0048446655,-0.05102539,0.00945282,-0.0107803345,-0.059509277,-0.011894226,-0.025634766,-0.04949951,-0.014526367,0.0143585205,-0.059387207,0.033996582,-0.070495605,0.0016613007,-0.0012950897,0.015777588,-0.0031700134,-0.02017212,-0.0069885254,0.018249512,-0.0051651,0.021514893,0.015060425,-0.036010742,0.011962891,0.013504028,0.02909851,0.038909912,0.020599365,0.048553467,-0.005569458,-0.0104522705,-0.04925537,0.0014133453,0.0060653687,0.021011353,0.009651184,-0.01876831,-0.027679443,0.03060913,-0.035461426,0.029586792,-0.047607422,0.019134521,0.00093460083,-0.00032663345,0.017852783,-0.032592773,-0.025970459,0.01701355,-0.027801514,-0.024383545,0.0065727234,0.019927979,0.003616333,-0.008201599,-0.0032100677,0.006134033,-0.04083252,-0.0029659271,-0.04736328,-0.04864502,0.024108887,-0.042633057,0.03363037,0.031341553,-0.0970459,0.013938904,-0.014709473,0.044006348,-0.0063972473,-0.012069702,0.009292603,0.008911133,-0.004585266,0.0039253235,0.0048675537,-0.055419922,-0.006877899,0.035858154,0.0014839172,0.0335083,-0.0038909912,0.027435303,0.00034928322,0.015365601,0.027923584,0.028076172,-0.002445221,-0.048339844,-0.06524658,-0.019897461,0.015037537,-0.050933838,-0.009307861,0.0021095276,-0.0057373047,-0.09893799,-0.020950317,-0.018661499,-0.008392334,-0.05279541,-0.026397705,-0.045013428,0.007080078,-0.020828247,-0.060058594,0.0033073425,-0.0065612793,0.040374756,0.018814087,0.027877808,0.054840088,0.0028839111,0.03994751,0.0463562,-0.023834229,-0.017578125,0.0052261353,0.007671356,0.0055885315,-0.010108948,0.009590149,-0.012901306,0.03387451,0.05718994,-0.015197754,-0.025268555,-0.005382538,-0.07318115,-0.039733887,-0.016189575,0.028930664,0.0074882507,-0.010269165,0.021240234,-0.0064468384,-0.033294678,0.015525818,0.032928467,0.0032997131,0.047180176,0.024658203,0.019744873,0.039245605,-0.013877869,-0.031311035,0.03753662,0.029205322,0.0037384033,0.0039024353,-0.066345215,0.025543213,0.013084412,-0.030914307,0.0047836304,0.0043563843,0.027908325,-0.022064209,-0.009689331,0.007434845,-0.017974854,-0.0059280396,-0.018310547,-0.008171082,0.022079468,-0.0006670952,0.0064315796,-0.023345947,-0.08129883,0.032714844,0.039123535,0.027175903,-0.01234436,-0.010055542,-0.01737976,-0.0099105835,-0.058044434,0.04159546,0.07244873,-0.013648987,-0.011116028,0.024749756,-0.02079773,-0.038146973,0.0049057007,-0.024398804,-0.025543213,-0.01637268,0.0059432983,-0.05508423,0.016937256,0.026443481,0.023773193,0.018096924,-0.01927185,-0.05810547,-0.013549805,-0.022109985,0.018341064,-0.03564453,-0.019927979,0.030563354,0.028656006,-0.0018138885,0.020874023,0.00907135,-0.0067214966,0.028442383,0.011123657,0.018096924,0.000046610832,-0.020874023,0.015655518,0.011421204,-0.066467285,0.008735657,-0.0138168335,0.030929565,-0.032470703,0.033813477,-0.014076233,0.014709473,0.034454346,-0.011764526,-0.06518555,0.02468872,0.008895874,0.009963989,0.0446167,-0.0184021,-0.018325806,-0.021621704,0.07531738,-0.020828247,-0.022766113,0.01852417,0.009269714,0.030548096,-0.014343262,-0.045410156,-0.022064209,0.003162384,-0.015945435,0.04324341,0.0026130676,0.027420044,0.004261017,0.003376007,-0.017364502,-0.016174316,-0.025054932,-0.00907135,-0.010093689,0.0066337585,-0.013305664,-0.012718201,0.019744873,-0.0115356445,0.0066223145,0.016143799,0.03463745,0.0062789917,0.008201599,-0.017105103,-0.040863037,0.010353088,-0.023635864,0.029418945,0.034484863,0.0020561218,0.019989014,-0.023269653,-0.015899658,0.022232056,0.022109985,0.029327393,0.01826477,-0.018035889,-0.05166626,-0.06878662,-0.028198242,-0.012161255,0.027664185,0.040618896,-0.005428314,0.047790527,0.024993896,-0.015396118,-0.0524292,0.029373169,-0.04650879,0.018463135,0.042999268,-0.008132935,-0.02279663,0.0059127808,0.0007638931,-0.019897461,0.04534912,0.023406982,0.013137817,0.04449463,0.028320312,0.010665894,0.0013866425,0.005836487,0.013717651,0.0059318542,-0.013282776,-0.028244019,-0.021575928,0.0049552917,-0.00969696,-0.028900146,-0.06567383,0.031982422,0.039367676,0.097595215,0.048614502,0.02041626,0.009170532,-0.032836914,-0.0048599243,-0.040222168,-0.015777588,-0.040252686,-0.04071045,0.027145386,0.007331848,0.016998291,-0.02204895,0.045410156,-0.012893677,0.015686035,-0.031585693,0.04385376,-0.008575439,-0.02230835,0.024871826,0.004966736,0.0574646,0.06921387,-0.0030899048,0.04296875,0.026733398,-0.027145386,0.006919861,0.062561035,-0.018585205,-0.012161255,-0.04220581,-0.030807495,0.0007362366,-0.005001068,-0.012374878,-0.007335663,-0.0031166077,0.034362793,0.021438599,-0.016326904,-0.011672974,0.0061416626,0.010101318,-0.0395813,-0.0076828003,-0.033813477,0.019866943,0.050231934,-0.010864258,-0.017669678,-0.011520386,-0.021011353,0.006702423,0.006591797,0.020599365,-0.003124237,-0.022491455,0.04260254,-0.01625061,0.021209717,0.017669678,0.037017822,0.03353882,0.009086609,0.047088623,0.027755737,-0.021270752,-0.06939697,0.00440979,-0.06518555,-0.005317688,0.042053223,-0.030303955,-0.011260986,-0.01725769,-0.03353882,-0.004737854,0.022338867,-0.021713257,-0.011917114,0.00032162666,-0.0008187294,-0.035827637,-0.06555176,-0.012954712,0.0056419373,0.048919678,0.021636963,-0.0034675598,-0.04324341,0.0030918121,0.02810669,0.0015716553,0.030059814,-0.012458801,-0.006904602,-0.007007599,-0.027191162,-0.022247314,-0.012435913,0.021759033,0.007698059,0.0017242432,0.019134521,0.015853882,0.0041275024,-0.0048713684,-0.0049591064,0.012077332,-0.008407593,0.017623901,0.007385254,0.06390381,0.0014400482,-0.03387451,-0.044952393,0.018051147,-0.004753113,0.03491211,-0.026290894,-0.017944336,0.0076904297,0.009109497,-0.02053833,-0.031982422,0.0006995201,-0.012611389,-0.04425049,-0.08001709,0.05126953,-0.015563965,0.026290894,0.029083252,-0.0048446655,-0.00092697144,-0.02166748,0.008468628,-0.0020942688,-0.013328552,-0.035461426,-0.04525757,-0.04067993,-0.0413208,-0.033294678,-0.039001465,0.028762817,-0.012512207,0.029541016,-0.013656616,-0.03869629,0.021713257,0.017486572,0.011222839,0.016693115,-0.0043296814,0.010314941,0.032104492,0.008003235,-0.041168213,0.016113281,0.0039100647,-0.0030994415,0.01411438,0.057525635,0.008026123,-0.006298065,0.02218628,-0.007575989,-0.018295288,-0.03250122,-0.004863739,-0.0065307617,-0.005378723,-0.018127441,-0.035827637,0.018661499,-0.005897522,-0.039398193,-0.06048584,0.018814087,0.023742676,-0.029815674,0.03262329,0.02218628,0.040222168,-0.027511597,0.02885437,0.010925293,0.046447754,0.041656494,0.0008506775,0.0010108948,0.012893677,-0.01424408,0.022338867,0.0045928955,-0.0012302399,0.008911133,0.016815186,0.03375244,0.0015497208,0.0067329407,-0.024627686,-0.027374268,0.008682251,-0.0154418945,-0.02305603,0.018463135,0.011909485,0.040100098,-0.00045633316,0.015975952,0.018737793,0.0053367615,-0.01638794,-0.0064086914,0.02293396,0.008766174,0.011474609,-0.0014677048,0.00819397,0.017501831,-0.055236816,0.0029010773,0.01411438,-0.0060653687,-0.00737381,-0.054260254,-0.037139893,0.022918701,0.029708862,0.00819397,0.020004272,0.016036987,-0.0018434525,-0.01687622,0.0052719116,0.0008454323,0.0002989769,-0.027420044,-0.055023193,-0.0059127808,0.010635376,0.007858276,-0.01625061,0.017242432,-0.026519775,-0.021881104,0.0077400208,-0.038116455,-0.009109497,-0.008987427,0.0004940033,0.024475098,-0.0077934265,0.011833191,-0.01399231,-0.0473938,-0.00024163723,-0.010398865,0.058746338,-0.050445557,0.024887085,-0.018463135,-0.015335083,0.0028629303,0.023498535,0.017807007,0.020248413,0.009811401,0.036987305,-0.054626465,0.049468994,-0.011917114,0.02168274,-0.0058403015,-0.046569824,-0.009140015,-0.011108398,-0.016036987,0.05014038,-0.020935059,-0.021209717,-0.038146973,-0.024993896,-0.0032234192,-0.05038452,0.027053833,0.023544312,0.039093018,-0.01486969,0.004962921,0.00042963028,0.018096924,-0.011642456,-0.024749756,-0.016799927,0.0095825195,0.022567749,0.019897461,-0.03213501,-0.017288208,-0.012374878,-0.004535675,-0.043518066,-0.05331421,0.010124207,0.0104522705,-0.015052795,0.012001038,-0.020904541,-0.009552002,-0.011367798,-0.04006958,-0.007713318,-0.002325058,0.015914917,0.0037078857,-0.018081665,-0.019546509,0.014297485,-0.015174866,0.019744873,0.0044136047,-0.0041656494,-0.049621582,0.018920898,0.0008111,0.04724121,-0.0082092285,-0.019241333,-0.0042381287,-0.032714844,-0.05596924,-0.009269714,0.021591187,-0.020492554,0.011154175,-0.019348145,-0.02406311,0.011260986,-0.031341553,-0.03274536,0.00274086,-0.02734375,0.0073661804,0.0041046143,0.015151978,0.032196045,-0.019348145,-0.014144897,0.009300232,0.0082473755,0.010864258,0.032165527,0.03164673,-0.0131073,-0.0259552,0.0014820099,0.007701874,-0.0016965866,-0.037384033,0.016296387,-0.010147095,0.0043525696,-0.016967773,0.016479492,-0.017227173,0.010665894,0.06555176,0.008575439,-0.008514404,-0.0031013489,-0.023895264,0.016998291,0.038024902,-0.009590149,0.004814148,-0.039978027,0.026123047,-0.014831543,0.035308838,0.008865356,0.02909851,-0.012420654,-0.02053833,-0.010292053,-0.011932373,-0.0039634705,-0.045440674,-0.0134887695,-0.056640625,-0.00065279007,-0.030853271,-0.032165527,0.00737381,0.021697998,-0.020965576,-0.08581543,0.0017137527,0.053466797,0.0028743744,0.01828003,-0.0041007996,0.03286743,0.022399902,-0.028656006,-0.0074272156,0.0056152344,-0.0491333,-0.0036067963,-0.030059814,0.013687134,-0.012298584,-0.008338928,0.0045166016,-0.0044174194,0.022003174,-0.004173279,0.026123047,-0.020355225,0.02078247,-0.025100708,0.021759033,-0.010643005,-0.031036377,0.04156494,-0.03390503,0.04901123,0.03643799,0.02571106,0.009468079,0.026809692,0.041229248,-0.03942871,-0.005039215,0.019439697,0.019500732,0.021270752,0.0034389496,0.023452759,0.019943237,0.02418518,-0.007835388,-0.018859863,-0.0034332275,-0.023880005,-0.006755829,0.029006958,-0.008407593,-0.017044067,-0.033935547,0.015655518,-0.001042366,0.01638794,-0.0033607483,-0.007801056,-0.007904053,-0.028198242,-0.010047913,0.013160706,0.0022621155,-0.023147583,0.029830933,-0.0047836304,0.011749268,0.010261536,-0.006664276,-0.0010671616,0.039764404,-0.0033473969,-0.0077323914,0.012916565,-0.0036506653,0.02027893,-0.0019130707,0.012962341,-0.05419922,-0.010322571,-0.021194458,-0.0028419495,-0.008125305,-0.03265381,0.0016202927,-0.021499634,0.002796173,-0.008506775,-0.03289795,-0.023925781,-0.018295288,-0.028533936,-0.018188477,-0.0018997192,0.011009216,0.014587402,0.018875122,0.0003569126,-0.021514893,0.014198303,-0.0025024414,-0.009841919,0.042785645,0.03479004,-0.010925293,-0.040222168,0.008590698,-0.013717651,-0.027130127,0.003856659,-0.025466919,0.00061130524,0.026824951,0.0074539185,-0.008483887,0.02243042,0.02746582,-0.026290894,0.018844604,0.0063285828,0.014205933,-0.03479004,0.023529053,-0.041748047,0.037109375,0.0057411194,0.009010315,-0.008056641,-0.020050049,-0.023376465,0.021987915,0.02041626,-0.0051460266,0.019226074,0.029464722,0.03967285,-0.00207901,0.0008134842,-0.002626419,-0.025756836,-0.017196655,0.027435303,0.006702423,0.005760193,0.0061416626,-0.030838013,0.003704071,-0.043884277,0.01928711,0.013877869,0.019927979,-0.047851562,-0.027801514,-0.012069702,-0.009506226,-0.04260254,0.01058197,-0.0055236816,0.040863037,0.027175903,0.028808594,0.020599365,0.016082764,-0.00028276443,-0.034851074,-0.023925781,0.0022602081,-0.0004348755,0.019622803,-0.010757446,0.024749756,0.052886963,-0.0012512207,0.034606934,0.04144287,0.0209198,0.0014019012,0.016662598,-0.024597168,0.020263672,-0.0051231384,0.007850647,0.008049011,0.037261963,-0.026733398,0.024612427,0.01210022,0.015899658,-0.039520264,0.028030396,0.07672119,0.019866943,-0.018478394,0.04058838,0.00472641,-0.022262573,-0.010627747,-0.017837524,0.04824829,-0.0028419495,0.018966675,0.047576904,0.016784668,-0.013977051,-0.01675415,-0.013710022,-0.025909424,0.047180176,0.029449463,0.0013837814,-0.012313843,-0.016311646,0.014602661,-0.04135132,-0.02758789,0.004890442,-0.017242432,0.020904541,-0.003408432,-0.0042533875,-0.024993896,0.004875183,0.019348145,0.010787964,-0.010772705,0.036956787,0.027740479,-0.003604889,0.01826477,-0.01676941,0.023086548,-0.010253906,-0.021377563,0.021392822,0.03289795,-0.006855011,-0.019042969,0.022354126,-0.007659912,0.038513184,0.044311523,-0.021713257,0.0071029663,0.037109375,-0.00009602308,-0.011444092,0.035003662,0.027175903,0.010040283,0.04434204,0.037231445,0.022155762,-0.041412354,0.013450623,-0.001625061,0.008773804,-0.023590088,-0.0049476624,0.018249512,-0.008255005,0.020141602,-0.0041618347,-0.03125,0.022888184,0.01802063,0.0014133453,-0.012741089,-0.0011825562,0.027267456,-0.022644043,-0.021194458,0.0061416626,0.0051193237,0.02734375,0.020721436,0.030426025,-0.014343262,0.02607727,0.0029697418,-0.008720398,-0.015258789,0.030838013,-0.04373169,-0.0046844482,-0.012649536,-0.011123657,-0.057678223,0.010749817,0.0018186569,0.015655518,0.008300781,-0.0016613007,-0.015213013,-0.0055160522,0.031051636,0.007888794,-0.006477356,0.0018434525,-0.021865845,0.0033626556,0.040130615,-0.014122009,0.0184021,-0.007671356,-0.010726929,-0.0034675598,-0.002603531,-0.01914978,-0.018829346,-0.005104065,-0.024505615,0.013587952,0.020584106,0.007881165,0.059509277,-0.021026611,-0.017562866,0.006095886,0.02835083,-0.0059509277,-0.00340271,-0.005168915,0.0043258667,-0.029464722,0.05014038,0.044006348,0.014320374,0.03982544,-0.004043579,-0.027664185,-0.0075149536,0.008407593,0.028930664,-0.012481689,-0.0032234192,0.008346558,0.040100098,-0.023895264,-0.036621094,0.00068330765,-0.026046753,-0.032409668,-0.017547607,0.001996994,-0.0033683777,0.021316528,0.027435303,0.02407837,-0.032592773,0.060791016,-0.02758789,0.036102295,-0.008575439,-0.012001038,0.03579712,0.001964569,0.041809082,0.0043411255,-0.0068130493,-0.03704834,0.010826111,0.013687134,0.01991272,0.02897644,-0.0030536652,-0.01448822,0.015899658,-0.0005803108,0.034240723,0.009941101,0.005153656,0.013404846,-0.018188477,0.0077438354,-0.014060974,0.008529663,0.011520386,0.030807495,-0.015899658,0.02029419,-0.026031494,0.0000538826,0.02507019,0.015029907,0.005859375,-0.012138367,-0.02017212,0.031311035,-0.014282227,-0.037506104,-0.0013036728,0.018432617,-0.072387695,-0.020904541,0.012329102,0.0087509155,-0.018829346,0.05331421,0.011482239,-0.005455017,0.004917145,0.031158447,-0.01687622,0.027297974,-0.0071792603,0.050048828,0.044006348,0.007423401,-0.011306763,0.020553589,0.018234253,-0.016952515,0.027313232,0.040161133,-0.014503479,0.011177063,-0.017593384,0.0013017654,-0.0008111,-0.008041382,-0.03149414,0.009208679,-0.0146484375,-0.005542755,0.006248474,0.022018433,-0.019424438,-0.006000519,-0.016021729,-0.011512756,0.01776123,0.041625977,0.025558472,-0.025238037,0.004306793,-0.0072402954,-0.0072021484,-0.014541626,-0.0055885315,0.006614685,-0.042877197,0.0008382797,0.018112183,0.004360199,0.026123047,-0.032287598,-0.006072998,0.02909851,0.014671326,0.04763794,0.01878357,-0.006099701,0.026489258,-0.00548172,-0.012435913,-0.010688782,0.0032806396,0.018478394,0.0107803345,0.0066604614,-0.017608643,0.024856567,-0.029220581,0.0068359375,0.018341064,0.0039901733,0.021957397,-0.014915466,0.0002439022,0.014038086,0.029876709,-0.0070495605,-0.021362305,-0.003332138,0.014099121,0.07110596,-0.009796143,0.009552002,0.023529053,0.0317688,0.022979736,0.04638672,0.023788452,0.0413208,0.016464233,-0.013389587,0.0067977905,0.027801514,-0.0032291412,-0.02407837,0.017425537,-0.021026611,-0.0047416687,0.027389526,0.030395508,0.012893677,-0.033294678,-0.0045776367,-0.02810669,-0.03918457,-0.0048294067,-0.014877319,0.00217247,-0.015335083,-0.009208679,0.0057144165,-0.011192322,-0.020706177,-0.01234436,0.010848999,-0.009292603,-0.055511475,-0.017028809,-0.02281189,0.011581421,-0.03277588,0.0019226074,-0.002122879,0.014328003,-0.02507019,-0.008644104,-0.007762909,0.0034332275,0.018676758,0.011833191,0.020904541,-0.014793396,-0.018966675,-0.027908325,0.0056648254,-0.011192322,0.043151855,-0.018829346,0.006324768,0.03692627,-0.0046463013,0.00038313866,-0.004600525,-0.013473511,-0.017654419,-0.02130127,-0.0045547485,0.02746582,0.014831543,0.0063171387,-0.017974854,0.039001465,-0.020187378,-0.026046753,0.019500732,0.037506104,0.017501831,0.018005371,-0.016937256,0.01663208,-0.043640137,0.0047569275,-0.021820068,0.0000718832,0.013404846,-0.008003235,0.0099487305,0.013046265,0.024780273,-0.007549286,0.005088806,0.05029297,0.016815186,0.016143799,0.025634766,-0.014770508,0.0044288635,-0.036499023,-0.01751709,0.011581421,0.02822876,0.018707275,0.015014648,-0.016845703,-0.011062622,-0.013198853,0.009857178,0.013999939,-0.008682251,-0.05444336,-0.01361084,-0.023895264,0.014587402,0.009437561,-0.0051956177,-0.0044174194,0.003742218,-0.018585205,-0.03778076,-0.03640747,0.042419434,0.018539429,-0.0075569153,-0.015899658,0.013839722,0.02381897,-0.030075073,-0.005683899,-0.058288574,-0.03112793,-0.018676758,-0.0044670105,0.018615723,-0.0062026978,0.009346008,-0.009460449,0.0031032562,-0.006160736,0.015304565,0.013442993,-0.025146484,-0.020004272,0.024856567,0.025238037,-0.014297485,0.02230835,-0.0012073517,0.0022335052,0.002313614,-0.000020861626,0.010559082,-0.03869629,0.01927185,0.0035495758,-0.003112793,0.039245605,-0.014083862,0.021484375,-0.015029907,0.013877869,-0.012268066,-0.011413574,0.039245605,-0.025970459,-0.013427734,-0.004573822,-0.005138397,-0.038360596,0.0062026978,0.0049209595,0.010604858,-0.009277344,0.046569824,-0.0095825195,-0.022949219,0.028152466,0.021148682,-0.019012451,0.0051116943,0.030731201,-0.008811951,-0.00032830238,-0.008605957,-0.011047363,-0.018951416,-0.025268555,-0.002111435,-0.0035057068,-0.012184143,0.03060913,0.012619019,0.04827881,-0.007904053,0.015136719,0.024154663,0.008514404,0.029632568,0.005672455,0.03753662,0.00042152405,-0.029953003,0.014953613,-0.0026664734,-0.027297974,0.007701874,-0.0037899017,0.018371582,-0.019882202,0.007575989,0.012191772,0.021392822,0.012527466,0.009475708,-0.016021729,-0.0027999878,-0.04043579,-0.01625061,-0.025421143,0.00066280365,0.034454346,0.018829346,0.025436401,-0.00415802,-0.0134887695,0.021148682,0.027679443,-0.0075683594,-0.020126343,-0.013900757,0.025344849,0.0010433197,0.03668213,0.019180298,-0.007972717,-0.025115967,-0.012069702,-0.012054443,0.0064468384,-0.008956909,0.0119018555,0.011062622,-0.019760132,-0.03488159,0.025268555,-0.0078048706,-0.0056266785,0.005180359,-0.001499176,0.03173828,0.017929077,-0.027786255,0.008804321,0.01361084,-0.04220581,0.051605225,0.0335083,0.013671875,0.0048599243,-0.0074043274,-0.045837402,-0.014083862,-0.007709503,-0.0041007996],"createdAt":"2026-04-18T18:52:17.639Z","updatedAt":"2026-04-28T06:34:17.348Z","lastSeenAt":"2026-04-28T06:34:17.348Z","tsv":"'/api/v1/portfolios/17/transactions':47 '/portfolios/17/transactions':146 '/request':14,28 '0.02':13,27,68,108,182 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':92 '20000':100 '300':121 '6':105 'Base network API' 'USDC micropayment API' 'access':37 'advertis':159 'ai':164 'ai/ml':58 'analysi':166 'analyt':57,162 'api':64,73 'appear':147 'base':9,23,87,101 'base-network' 'beyond':136 'broader':53,157 'call':4,18,111 'categori':160 'challeng':95,139 'commit':80 'connect':194 'contract':91 'crypto':172 'crypto portfolio data' 'data':41,56 'decim':106 'detail':128,201 'document':129,189 'enabl':32 'endpoint':7,21,33,113,135,143,209 'equal':107 'estim':174 'exact':116,204 'feed':171 'financ':169 'finance/web3':60 'found':131 'gas':173 'geocod':175 'howev':188 'includ':161 'infer':59 'infrastructur':62 'key':74 'limit':77 'list':144 'lowpaymentfee' 'lowpaymentfee.com':35 'maxamountrequir':98 'metadata':140 'metric':163 'network':88 'no-api-key' 'offer':55 'openapi':125 'page':190 'part':50 'pay':2,16 'pay-per-cal':1,15 'pay-per-call' 'pay-per-request API' 'payment':82,117 'per':3,17,69,110,184 'per-request':183 'platform':54,158 'point':187 'portfolio':5,19,39,152 'portfolio transactions API' 'portfolio-transactions' 'post':44 'price':66,170,186 'prompt':196 'provid':36 'rate':76 'request':45,70,185 'request/response':205 'requir':81 'resourc':155 'return':191 'schema':126,206 'scheme':118 'second':122 'sentiment':165 'settl':84 'singl':151 'specif':134,142 'specifi':96 'summar':168 'technic':200 'text':167 'timeout':123 'transact':6,20,40,154 'unit':102 'unknown':211 'usd':109 'usdc':12,26,90 'usdc-settlement' 'use':89,114 'util':63 'via':10,24,42 'wallet':195 'x402':11,25,31,94,138 'x402 finance endpoint' 'x402-enabled':30 'x402-payment'","prices":[{"id":"d4aaad9b-4304-46f8-812e-a4e9f2b78ccc","listingId":"e0db2808-20be-48ff-98e1-b5377041b616","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/17/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":"2026-04-18T18:52:17.639Z"}],"sources":[{"listingId":"e0db2808-20be-48ff-98e1-b5377041b616","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/17/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:17.639Z","lastSeenAt":"2026-04-28T06:34:17.348Z"}],"details":{"listingId":"e0db2808-20be-48ff-98e1-b5377041b616","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/17/transactions \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/portfolios/17/transactions"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/portfolios/17/transactions"}],"useCases":["Fetching transaction history for a specific portfolio","Integrating portfolio transaction data into dashboards or analytics pipelines","Agent-driven portfolio monitoring with per-call USDC payments"],"bestFor":["Developers wanting keyless, pay-per-call access to portfolio transaction data","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:01.623Z"},"updatedAt":"2026-04-28T06:34:17.348Z"}}