{"id":"9f3d5495-455e-4f6a-937c-0983a4651248","shortId":"w9PgLb","kind":"x402","title":"Portfolio performance data via x402 micropayment on Base network, $0.02 per request.","tagline":"Portfolio performance data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 98) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per call (maxAmountRequired of 20,000 base units with 6 decimals = $0.02). No API keys or rate limits are required — access is granted per-request via the x402 payment protocol.\n\nThe parent site lowpaymentfee.com hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced at $0.02 per request. However, this specific endpoint is scoped to portfolio performance. The exact schema of the response payload is not documented in the crawled material; the endpoint description is simply \"Premium API Access\" and no OpenAPI spec or detailed field-level documentation was found.\n\nBecause the endpoint returned a well-formed 402 challenge with x402 version 1, it is confirmed live. The USDC asset contract (0x8335…2913) matches the canonical Base-mainnet USDC address. Timeout is 300 seconds. No input schema beyond HTTP POST is specified, so callers should experiment with request bodies or check for additional documentation.","tags":[],"capabilities":["portfolio-performance","x402-micropayment","usdc-payment","base-network","json-response","pay-per-request"],"categories":["finance","data"],"synonyms":["portfolio analytics","investment performance","portfolio returns","financial data API","portfolio tracking","x402 finance API"],"warnings":["No OpenAPI or response schema available — the structure of the returned portfolio performance data is undocumented.","The specific portfolio ID (98) is hardcoded in the URL; it is unclear whether other portfolio IDs are available or how they are discovered.","Documentation pages (/docs, /pricing, /README, /api) returned no meaningful content beyond 'Connect wallet'.","The broader site lists many API categories but this endpoint's relationship to the rest of the platform is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/98/performance","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/98/performance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no response schema, no request body documentation, and the crawled docs/pricing/README pages all returned only 'Connect wallet' with no useful content. The endpoint's actual data output is unknown.","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":"2026-04-19T09:15:13.230Z","embedding":[0.007461548,-0.021072388,0.037628174,0.01914978,0.013374329,-0.009429932,-0.035705566,0.0017757416,0.07067871,-0.035339355,0.02796936,-0.051879883,-0.02810669,-0.042266846,0.009490967,0.009063721,0.027252197,-0.011238098,-0.05709839,0.052642822,0.03024292,-0.030883789,-0.014015198,0.014549255,0.0014572144,-0.0015974045,-0.015586853,-0.012893677,-0.016983032,-0.045135498,0.0357666,-0.020095825,-0.021072388,0.010871887,-0.03829956,-0.013374329,0.009986877,0.02633667,0.021606445,-0.013511658,-0.006088257,-0.05569458,0.030319214,-0.0052719116,-0.034332275,-0.004463196,0.02508545,-0.042999268,0.03781128,0.01637268,-0.037597656,-0.0004925728,-0.016143799,0.025787354,0.025009155,0.022903442,0.03753662,0.009002686,0.0074882507,0.017852783,0.008964539,-0.05105591,0.011367798,-0.0088272095,0.0059814453,0.037353516,-0.035247803,0.05227661,-0.002960205,0.07598877,0.01600647,0.04434204,0.025009155,0.0076904297,-0.009552002,-0.013664246,-0.0067481995,0.039123535,0.0073242188,-0.03326416,0.00013780594,0.005050659,-0.04852295,-0.013641357,-0.024139404,-0.04711914,-0.010147095,-0.000024497509,-0.03225708,0.04949951,-0.07977295,0.010299683,-0.008674622,0.015533447,-0.006416321,-0.009094238,-0.008560181,0.011711121,0.0027980804,0.034088135,0.013809204,-0.028762817,-0.011016846,0.015853882,0.027435303,0.05203247,0.007537842,0.05090332,-0.014076233,-0.015838623,-0.045928955,0.0036525726,-0.012039185,0.022277832,0.007408142,-0.0149002075,-0.037872314,0.022567749,-0.016952515,0.015930176,-0.054718018,0.023895264,0.020309448,-0.01235199,0.022094727,-0.039031982,-0.012916565,0.005420685,-0.03616333,-0.025619507,0.017089844,0.012046814,0.013557434,-0.022888184,-0.020568848,0.007701874,-0.016540527,-0.05053711,-0.050598145,-0.039031982,0.030319214,-0.029922485,0.047088623,0.014465332,-0.06896973,0.03363037,-0.015388489,0.02885437,0.0021514893,-0.0046653748,0.0045814514,0.026733398,-0.025894165,0.014518738,0.00079870224,-0.04095459,-0.016555786,0.010826111,-0.005012512,0.024841309,0.0052223206,0.03274536,-0.012336731,0.0069351196,0.037841797,0.026672363,-0.019607544,-0.049713135,-0.08758545,-0.019897461,0.015510559,-0.022476196,-0.011016846,-0.01966858,-0.00050497055,-0.08782959,-0.015220642,-0.02154541,0.014640808,-0.0473938,-0.02758789,-0.03656006,0.017623901,-0.007247925,-0.06021118,0.020874023,-0.010696411,0.0647583,0.023025513,0.03186035,0.055603027,-0.006767273,0.04736328,0.018814087,-0.050872803,-0.02331543,0.0011196136,-0.018478394,-0.017715454,0.0050621033,0.006969452,-0.01486969,0.056518555,0.050628662,0.00894165,-0.01309967,-0.0076293945,-0.059326172,-0.028259277,0.0009832382,0.034454346,0.034240723,-0.008796692,0.017105103,-0.012641907,-0.034088135,0.01600647,0.023513794,0.009963989,0.0574646,0.011207581,0.03741455,0.026672363,-0.007255554,-0.026855469,0.042663574,0.026123047,0.008407593,-0.00062179565,-0.06390381,0.022857666,0.0074882507,-0.020202637,0.005973816,0.00026798248,0.02142334,-0.026855469,-0.012763977,0.011886597,-0.034332275,-0.0016736984,-0.020843506,0.003835678,0.03237915,0.0070533752,-0.0038146973,-0.035186768,-0.08337402,0.0068626404,0.015853882,0.033691406,-0.020736694,-0.009757996,-0.02684021,0.008232117,-0.03466797,0.03186035,0.061828613,-0.01159668,-0.016067505,0.012023926,-0.018981934,-0.028808594,-0.0057258606,-0.028396606,-0.01977539,-0.02255249,-0.009887695,-0.051757812,0.016357422,0.023956299,0.03781128,0.024841309,-0.02784729,-0.052459717,0.0010881424,-0.023513794,0.009597778,-0.054595947,-0.02482605,0.007259369,0.009712219,-0.013572693,0.03274536,0.018722534,-0.0068626404,0.012313843,0.023788452,-0.0102005005,-0.0035305023,-0.03213501,0.0055160522,0.023483276,-0.06695557,0.0049476624,-0.0041999817,0.046539307,-0.020812988,0.02420044,-0.011978149,0.030914307,0.048461914,-0.010925293,-0.05960083,0.025619507,0.015167236,0.010856628,0.031143188,-0.022201538,-0.018417358,-0.029373169,0.05819702,-0.030654907,-0.001745224,0.00932312,0.010574341,0.032165527,-0.014465332,-0.02583313,-0.02909851,-0.009101868,-0.04058838,0.0095825195,-0.0003976822,0.035003662,-0.0017938614,0.018737793,-0.020080566,-0.015808105,-0.019561768,0.006149292,-0.013687134,0.0041885376,-0.0034770966,-0.008720398,0.019607544,0.008514404,-0.01335144,0.013328552,0.028884888,0.009208679,-0.012268066,-0.02961731,-0.021530151,0.0051193237,-0.024627686,0.02859497,0.040527344,0.00969696,0.018310547,-0.011894226,-0.010375977,0.024139404,0.021514893,0.03567505,-0.012641907,0.012359619,-0.06011963,-0.08428955,-0.031021118,-0.017562866,0.024047852,0.043762207,0.005268097,0.032562256,0.02658081,-0.027450562,-0.05734253,0.03149414,-0.056884766,0.0002465248,0.050201416,-0.013175964,-0.013496399,-0.009300232,0.022125244,0.008071899,0.061401367,0.019943237,0.005306244,0.039367676,0.03692627,0.018463135,-0.006778717,0.02520752,0.029876709,0.010894775,-0.0048103333,-0.051513672,0.010536194,0.0077667236,-0.024856567,-0.03677368,-0.08013916,0.021957397,0.044128418,0.08258057,0.04260254,0.029220581,0.004135132,-0.051208496,-0.011711121,-0.04046631,-0.0043525696,-0.036743164,-0.0519104,0.024932861,0.0068511963,0.021392822,-0.023330688,0.03062439,-0.028656006,0.0063972473,-0.02696228,0.07141113,-0.010864258,-0.0033664703,0.016204834,0.011192322,0.052001953,0.060058594,-0.03164673,0.03955078,0.028930664,-0.033966064,0.0030651093,0.048797607,-0.02078247,-0.010543823,-0.06890869,-0.041259766,0.0038833618,0.007926941,-0.002588272,-0.019226074,-0.0024147034,0.030654907,0.01083374,-0.037597656,-0.009712219,0.014381409,-0.0021305084,-0.0519104,-0.010063171,-0.044677734,-0.0051574707,0.039855957,-0.00084495544,-0.023345947,0.005935669,-0.0073394775,0.011634827,0.027816772,0.010025024,-0.0025310516,-0.02973938,0.03326416,-0.013641357,0.008872986,0.022659302,0.03466797,0.019546509,0.02571106,0.049438477,0.020462036,-0.008140564,-0.042419434,-0.0063667297,-0.0637207,-0.008140564,0.03289795,-0.0181427,-0.0026855469,-0.025619507,-0.008148193,0.008132935,0.016052246,-0.034606934,0.009490967,0.013290405,-0.010032654,-0.04815674,-0.07116699,-0.026168823,0.012260437,0.08514404,0.033447266,-0.005302429,-0.031066895,-0.022094727,0.034362793,-0.007019043,0.044708252,-0.014945984,-0.016693115,-0.009780884,-0.03567505,0.0031909943,-0.015960693,0.016616821,0.015182495,-0.020599365,0.023986816,0.008026123,0.0032920837,-0.02305603,-0.017333984,-0.0017356873,0.011550903,0.009635925,-0.015510559,0.06829834,-0.0011949539,-0.014274597,-0.054138184,0.028320312,0.00092220306,0.035980225,-0.030181885,-0.009536743,0.011192322,-0.0021896362,-0.021347046,-0.02281189,0.013313293,0.0027446747,-0.048614502,-0.090270996,0.04058838,-0.019515991,0.026473999,0.007911682,0.002981186,0.008018494,-0.0184021,0.018569946,-0.008956909,-0.015068054,-0.035369873,-0.035125732,-0.018630981,-0.04547119,-0.02909851,-0.030700684,0.027893066,-0.02947998,0.025161743,-0.015625,-0.03656006,0.022140503,0.0062789917,0.008201599,0.023880005,-0.0033569336,0.0023441315,0.040161133,0.004333496,-0.044525146,0.006614685,0.008590698,0.0013666153,0.025177002,0.053344727,0.0056114197,-0.031341553,0.017608643,0.0009279251,-0.018447876,-0.03604126,0.0015268326,0.0022411346,0.012397766,-0.013595581,-0.028625488,0.036834717,0.026519775,-0.05218506,-0.035705566,0.0357666,0.024108887,-0.027816772,0.039978027,0.015975952,0.044403076,-0.037628174,0.031143188,-0.0024528503,0.030258179,0.028915405,0.017349243,-0.017456055,-0.0026302338,-0.011123657,0.00680542,0.016616821,-0.016662598,0.010124207,0.015029907,0.04348755,-0.0030708313,0.019622803,-0.027282715,-0.02381897,0.0060043335,-0.008491516,-0.007675171,0.032684326,0.013298035,0.018829346,0.010009766,0.018707275,0.02003479,-0.008674622,-0.004180908,-0.020004272,0.04321289,0.008308411,0.013313293,0.008995056,0.00945282,0.022735596,-0.046081543,-0.004360199,0.019699097,-0.006439209,-0.0231781,-0.051483154,-0.0256958,0.009666443,0.020980835,0.02508545,0.010063171,0.012283325,0.0010671616,-0.019042969,-0.012680054,0.019500732,0.014030457,-0.046173096,-0.05657959,0.0011587143,0.02053833,0.013534546,-0.01878357,0.013557434,-0.021881104,-0.010322571,0.0077590942,-0.03390503,0.0006284714,-0.012588501,-0.002937317,0.013076782,0.007865906,0.008094788,-0.020935059,-0.048675537,0.019180298,-0.016021729,0.072509766,-0.04309082,0.020996094,-0.0063285828,-0.005050659,0.0033740997,0.021621704,0.01838684,0.044647217,0.013389587,0.032287598,-0.015289307,0.04849243,-0.018676758,0.016586304,-0.0065612793,-0.066589355,-0.01058197,-0.023071289,-0.00491333,0.043395996,-0.029693604,-0.0076065063,-0.041290283,-0.027374268,-0.008338928,-0.050994873,0.020462036,0.032440186,0.049560547,-0.02748108,0.0067863464,0.0052948,0.0070343018,-0.017105103,-0.021713257,-0.0043945312,0.010238647,0.011161804,0.021514893,-0.025512695,-0.007926941,-0.0022697449,0.023239136,-0.033935547,-0.034332275,0.008911133,-0.005115509,-0.02166748,0.03149414,-0.0028419495,-0.009155273,-0.008399963,-0.05142212,-0.012939453,-0.010009766,0.02053833,0.015777588,-0.010368347,-0.014533997,0.0078125,-0.015960693,0.03237915,-0.005455017,-0.018417358,-0.045562744,0.0017538071,0.0002424717,0.03881836,0.0076904297,-0.029663086,-0.006023407,-0.025466919,-0.057769775,-0.015975952,0.021453857,-0.016525269,0.004135132,-0.019256592,-0.029846191,0.015586853,-0.030761719,-0.014053345,-0.008026123,-0.016098022,0.0050964355,-0.011581421,0.0149002075,0.035888672,-0.004070282,-0.017349243,0.0010814667,0.010070801,0.012916565,0.028213501,0.017730713,-0.022399902,-0.020019531,0.012199402,0.000012218952,-0.008514404,-0.041229248,0.0052375793,-0.020736694,-0.0073242188,0.0076179504,0.012306213,-0.018615723,0.016845703,0.072509766,-0.0007071495,-0.0057411194,0.00340271,-0.024795532,0.022994995,0.049102783,-0.016220093,-0.007675171,-0.032958984,0.014511108,-0.0031528473,0.040100098,0.0036621094,0.02482605,-0.008056641,-0.015380859,-0.0028419495,0.0017585754,0.00030112267,-0.046295166,-0.008804321,-0.058563232,0.0018901825,-0.014289856,-0.031921387,0.026062012,0.011054993,-0.011634827,-0.07775879,0.009757996,0.042144775,-0.0115356445,0.017227173,-0.00333786,0.05142212,0.0013370514,-0.024169922,-0.014755249,0.014625549,-0.051086426,-0.01751709,-0.042419434,0.020385742,-0.021697998,-0.011650085,0.024032593,-0.0075149536,0.019622803,-0.016693115,0.026779175,-0.02885437,0.021316528,-0.022537231,0.010978699,-0.0129852295,-0.028549194,0.046691895,-0.04095459,0.040527344,0.037750244,0.031677246,0.0051612854,0.00390625,0.03491211,-0.041290283,0.0038089752,0.033966064,0.024139404,0.026290894,-0.008071899,0.008010864,0.018051147,0.019165039,-0.014144897,-0.011772156,-0.0181427,-0.034820557,-0.0158844,0.017654419,-0.020095825,-0.006008148,-0.026290894,0.0024585724,0.013511658,0.0046691895,0.005924225,-0.022277832,-0.008514404,-0.026153564,0.0076065063,0.0027923584,-0.022827148,-0.0049362183,0.029693604,-0.012275696,0.014389038,0.0154418945,0.0016822815,0.011016846,0.036499023,0.0054512024,-0.005329132,0.013366699,0.006401062,0.01626587,-0.013793945,0.0065460205,-0.040161133,-0.0050086975,-0.016677856,0.011245728,-0.010437012,-0.024490356,-0.0013608932,-0.011421204,0.0046691895,-0.009490967,-0.036956787,-0.012382507,-0.019195557,-0.01701355,-0.0040893555,-0.025543213,0.005657196,0.014289856,0.0032253265,0.002067566,-0.016967773,0.04232788,-0.0013093948,0.000015854836,0.017532349,0.025283813,-0.008171082,-0.029800415,-0.00096035004,-0.0052223206,-0.016159058,0.022888184,-0.024719238,-0.0016822815,0.032348633,0.015602112,-0.0033836365,0.017501831,0.028289795,-0.016296387,0.017730713,0.01184845,0.01574707,-0.03552246,0.0158844,-0.037353516,0.026168823,0.004573822,0.025421143,0.01158905,-0.014732361,-0.02027893,0.022979736,0.025924683,-0.01158905,0.037261963,0.002204895,0.040130615,-0.015350342,-0.008712769,-0.00945282,-0.009841919,0.0030498505,0.030471802,0.000073730946,0.021957397,0.003332138,-0.005657196,0.004211426,-0.03253174,0.03955078,0.023147583,0.00019979477,-0.03640747,-0.037109375,-0.028442383,0.006111145,-0.043182373,0.0063095093,0.004917145,0.037841797,0.026535034,0.038269043,-0.0066452026,0.00055265427,0.0061416626,-0.030075073,-0.0287323,-0.015289307,-0.009246826,0.023880005,-0.0055236816,0.028671265,0.061676025,-0.0061416626,0.03265381,0.041625977,0.013717651,0.021774292,0.010665894,-0.027450562,0.022155762,-0.007881165,0.019165039,0.025390625,0.04650879,-0.011367798,0.028671265,0.0016565323,0.017410278,-0.025787354,0.021697998,0.09503174,0.029693604,0.0015583038,0.042816162,-0.015930176,-0.022735596,-0.0042533875,-0.016952515,0.047851562,-0.0035820007,0.03665161,0.03881836,0.024642944,-0.013938904,-0.0030441284,-0.015106201,-0.03918457,0.034729004,0.029205322,0.0010948181,-0.007083893,-0.023086548,0.004562378,-0.041015625,-0.038848877,-0.0014791489,0.0047950745,0.009277344,-0.007232666,-0.0059890747,-0.013336182,0.0064048767,0.027801514,0.0015106201,-0.01146698,0.048187256,0.028213501,-0.004749298,0.011024475,-0.008888245,0.028076172,-0.014846802,-0.015792847,0.009933472,0.02128601,0.005207062,-0.023345947,0.021347046,-0.0036239624,0.034820557,0.044830322,-0.022125244,0.009132385,0.027999878,-0.014572144,-0.0043907166,0.04156494,0.026779175,0.015365601,0.04019165,0.037109375,0.018875122,-0.033111572,0.014015198,0.001001358,0.008758545,-0.0049705505,-0.0035324097,0.013069153,-0.023544312,0.019561768,-0.002948761,-0.033203125,0.033447266,0.0112838745,-0.012901306,-0.0014753342,-0.004962921,0.026779175,-0.022567749,-0.018722534,0.008377075,-0.00090932846,0.023147583,0.033599854,0.03753662,-0.013427734,0.021942139,0.019241333,-0.02696228,-0.011695862,0.019485474,-0.02357483,-0.010475159,-0.0033111572,-0.0060043335,-0.062408447,0.017501831,0.0053749084,-0.0015420914,0.02909851,-0.006336212,-0.0154800415,-0.0044822693,0.019058228,0.0011138916,0.0017309189,0.005012512,-0.025405884,0.008071899,0.034729004,-0.009719849,0.01512146,-0.0112838745,-0.011680603,-0.0015878677,-0.0025978088,-0.029891968,-0.00623703,-0.009361267,-0.037963867,0.00061798096,0.022903442,0.010406494,0.05783081,-0.0017127991,-0.015548706,0.0025348663,0.038085938,0.009735107,0.0010499954,-0.00868988,0.010665894,-0.020217896,0.044006348,0.0211792,-0.0062179565,0.022277832,-0.0023841858,-0.02418518,-0.015144348,0.0024738312,0.023071289,-0.015838623,-0.0069885254,-0.001745224,0.03265381,-0.018539429,-0.04763794,-0.004005432,-0.017669678,-0.017120361,-0.031829834,-0.0011434555,-0.00045585632,0.025970459,0.015571594,0.01638794,-0.03277588,0.06591797,-0.017456055,0.036712646,-0.031585693,-0.0022239685,0.04559326,0.024719238,0.04824829,0.00066947937,0.0057296753,-0.022445679,0.016983032,0.037902832,0.013679504,0.03552246,0.0016870499,-0.011299133,0.027954102,-0.006793976,0.031036377,0.0027656555,0.005191803,0.017959595,-0.010437012,0.0065574646,-0.0017108917,0.0074539185,0.016571045,0.024429321,-0.0033245087,0.022247314,-0.038635254,-0.0027103424,0.028411865,0.014038086,0.007820129,-0.0012083054,-0.012771606,0.025360107,-0.018600464,-0.020248413,-0.008361816,0.003768921,-0.07397461,-0.021606445,0.016052246,0.014884949,-0.02456665,0.066101074,0.004962921,-0.0018625259,0.026367188,0.035217285,-0.013336182,0.037261963,0.012176514,0.033447266,0.043823242,-0.003982544,-0.016952515,0.02670288,0.0049362183,-0.019241333,0.023956299,0.045043945,-0.0060539246,0.031219482,-0.009033203,0.0008659363,0.0020313263,0.006427765,-0.013114929,-0.0049057007,-0.016540527,-0.004875183,-0.008758545,0.021392822,-0.0149002075,-0.011375427,-0.022506714,-0.014038086,0.008422852,0.039642334,0.024841309,-0.03289795,0.014389038,-0.005859375,0.0011234283,-0.0072784424,-0.0034389496,-0.0096206665,-0.04425049,0.015129089,0.019882202,-0.0066490173,0.03967285,-0.03491211,-0.0057296753,0.026657104,0.025283813,0.037872314,-0.0003774166,-0.009056091,0.017028809,-0.013809204,0.0035495758,-0.012718201,-0.008117676,0.008155823,0.009437561,0.0031471252,-0.015312195,0.029327393,-0.023391724,0.010223389,0.0045280457,0.015655518,0.029922485,-0.010314941,-0.0030345917,0.01966858,0.04196167,-0.0022964478,-0.020248413,-0.002155304,0.027877808,0.07293701,0.0014925003,0.00005620718,0.023071289,0.024673462,0.014518738,0.046875,0.0069999695,0.022354126,0.017593384,-0.011047363,-0.007007599,0.04058838,-0.011505127,-0.019378662,0.029220581,-0.035095215,-0.025817871,0.020858765,0.018173218,0.009407043,-0.033569336,0.0046958923,-0.016113281,-0.036621094,-0.010543823,-0.01473999,-0.0059661865,-0.0071258545,-0.0062942505,0.024612427,0.000117599964,-0.01826477,-0.005584717,0.0074806213,-0.022140503,-0.052978516,-0.0024490356,-0.022125244,0.0012464523,-0.03994751,0.000094771385,0.0054130554,0.026062012,-0.01940918,0.00092077255,0.0022411346,0.005935669,0.0234375,0.01398468,0.015365601,-0.007965088,-0.035980225,-0.025146484,-0.013847351,-0.0061798096,0.039001465,-0.015388489,0.026382446,0.023284912,0.0038890839,-0.00390625,0.0012407303,-0.0063552856,-0.0141067505,-0.033081055,-0.016708374,0.020370483,0.019989014,0.007583618,-0.016677856,0.036010742,-0.0078125,-0.030441284,0.009155273,0.045959473,0.019454956,0.015014648,-0.009971619,0.006198883,-0.035980225,0.005695343,-0.006729126,-0.001748085,0.024871826,-0.003419876,-0.0062713623,0.014549255,0.022994995,-0.016220093,-0.0030002594,0.04055786,-0.00014090538,0.001036644,0.018234253,-0.002035141,0.002708435,-0.035369873,-0.026779175,0.012908936,0.04373169,0.019348145,0.004459381,-0.0127334595,-0.0064735413,-0.004802704,0.0053749084,0.0072288513,-0.0014104843,-0.04373169,-0.022491455,-0.009941101,0.036712646,0.010498047,0.0063934326,-0.007118225,0.006210327,-0.017532349,-0.021453857,-0.027664185,0.048553467,0.02015686,-0.03173828,-0.010482788,0.0032577515,0.0032348633,-0.023803711,-0.00592041,-0.05255127,-0.01737976,-0.008605957,-0.013572693,0.00944519,0.006587982,0.018981934,-0.008590698,0.0069885254,-0.00084114075,0.011276245,0.011520386,-0.022720337,-0.00894165,0.036468506,0.0062065125,-0.00459671,0.02178955,0.017807007,-0.007019043,0.008666992,-0.0048065186,0.005065918,-0.039886475,0.020187378,0.017349243,-0.0044517517,0.022979736,-0.03036499,0.020904541,-0.004837036,0.009796143,-0.0138168335,0.0012331009,0.021453857,-0.023956299,-0.015823364,0.0014533997,-0.013977051,-0.04232788,0.00447464,0.014274597,0.019226074,-0.03466797,0.039398193,-0.012794495,-0.014381409,0.015365601,0.014038086,-0.013809204,-0.0060195923,0.028244019,0.0019721985,-0.0019187927,-0.0024051666,-0.02017212,-0.017684937,-0.026138306,-0.005695343,-0.013496399,0.0008044243,0.041412354,-0.005958557,0.047790527,0.0132751465,0.02116394,0.020065308,-0.0017747879,0.019638062,0.0020751953,0.04345703,0.019470215,-0.021026611,0.018585205,-0.0066566467,-0.019592285,-0.00006121397,-0.00756073,0.018493652,-0.013519287,0.0063705444,0.0027828217,0.013198853,0.012771606,0.015213013,-0.008857727,0.014549255,-0.048309326,-0.016921997,-0.019714355,-0.0038471222,0.029693604,0.0121536255,0.016311646,0.002702713,-0.0017681122,0.026809692,0.045074463,-0.012649536,-0.019332886,-0.014442444,0.008926392,-0.0044784546,0.005264282,0.012893677,-0.017913818,-0.0061912537,-0.0063476562,-0.012779236,0.019760132,-0.0046844482,0.012260437,0.0052261353,-0.014755249,-0.034301758,0.022247314,-0.022476196,0.0029506683,0.017822266,-0.0058135986,0.01776123,0.013793945,-0.02758789,0.010398865,0.022964478,-0.03050232,0.030517578,0.026123047,0.0031051636,0.0033740997,-0.0027561188,-0.038146973,-0.018569946,0.01033783,-0.0051574707],"createdAt":"2026-04-18T18:53:48.909Z","updatedAt":"2026-04-27T12:34:56.616Z","lastSeenAt":"2026-04-27T12:34:56.616Z","tsv":"'0.02':10,22,61,73,121 '000':67 '0x8335':189 '1':180 '20':66 '2913':190 '300':201 '402':175 '6':71 '98':38 'accept':45 'access':82,154 'addit':221 'address':198 'ai/ml':110 'analyt':109 'api':75,106,153 'asset':187 'base':8,20,58,68,195 'base-mainnet':194 'base-network' 'behind':39 'beyond':206 'bodi':217 'broader':99 'call':63,105 'caller':212 'canon':193 'challeng':176 'check':219 'confirm':183 'contract':188 'crawl':145 'data':3,15,32,108,114 'decim':72 'descript':149 'detail':160 'document':142,164,222 'endpoint':26,44,127,148,169 'exact':134 'experi':214 'field':162 'field-level':161 'finance/crypto':112 'financial data API' 'form':174 'found':166 'grant':84 'host':97 'howev':124 'http':207 'id':37 'infer':111 'input':204 'investment performance' 'json':50 'json-response' 'key':76 'level':163 'limit':79 'live':184 'lowpaymentfee.com':28,96 'mainnet':196 'market':113 'match':191 'materi':146 'maxamountrequir':64 'micropay':6,18 'network':9,21,59 'openapi':157 'parent':94 'pay':103 'pay-per-cal':102 'pay-per-request' 'payload':139 'payment':51,91 'paywal':42 'per':11,23,62,86,104,122 'per-request':85 'perform':2,14,31,132 'portfolio':1,13,30,36,131 'portfolio analytics' 'portfolio returns' 'portfolio tracking' 'portfolio-performance' 'post':46,208 'premium':152 'price':119 'protocol':92 'provid':29 'rate':78 'request':12,24,47,87,123,216 'requir':81 'respons':138 'return':49,170 'schema':135,205 'scope':129 'second':202 'servic':117 'settl':53 'simpli':151 'site':95 'span':107 'spec':158 'specif':35,126 'specifi':210 'suit':100 'timeout':199 'unit':69 'usdc':55,186,197 'usdc-payment' 'util':116 'version':179 'via':4,16,88 'well':173 'well-form':172 'x402':5,17,41,90,178 'x402 finance API' 'x402-micropayment'","prices":[{"id":"11040bcf-a9aa-448d-a789-5999dde3c43d","listingId":"9f3d5495-455e-4f6a-937c-0983a4651248","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/98/performance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:48.909Z"}],"sources":[{"listingId":"9f3d5495-455e-4f6a-937c-0983a4651248","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/98/performance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:48.909Z","lastSeenAt":"2026-04-27T12:34:56.616Z"}],"details":{"listingId":"9f3d5495-455e-4f6a-937c-0983a4651248","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/98/performance \\\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":"Endpoint returns 402 with x402 version 1 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/portfolios/98/performance"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/portfolios/98/performance"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/portfolios/98/performance"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving performance metrics for a tracked portfolio","Integrating portfolio performance data into dashboards or agents","Programmatic access to portfolio returns without API key management"],"bestFor":["Agents or apps needing on-demand portfolio performance data","Developers who prefer pay-per-call over subscription billing","Crypto-native workflows that can settle USDC on Base"],"notFor":["Users needing detailed API documentation or guaranteed response schemas","High-frequency bulk data pulls where per-request pricing adds up","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:57.301Z"},"updatedAt":"2026-04-27T12:34:56.616Z"}}