{"id":"a1b6dba4-13ea-4a81-94f4-365e732f0987","shortId":"JnSHvH","kind":"x402","title":"Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.","tagline":"Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns portfolio holdings data for portfolio ID 7. It is part of a broader platform offering various pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact-payment scheme. The maximum amount required is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 per request. No API keys or rate limits are advertised; access is gated purely by micropayment. The payment timeout is 300 seconds.\n\nDocumentation is extremely sparse — the docs, pricing, API, 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 holdings response contains. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual data returned after payment is unknown. The platform advertises simple $0.02/request pricing across all its endpoints with no minimums or commitments.","tags":[],"capabilities":["x402-payment","usdc-base","portfolio-holdings","pay-per-request","json-api","no-api-key"],"categories":["finance","data"],"synonyms":["portfolio holdings API","investment holdings","portfolio data","x402 finance API","crypto portfolio","lowpaymentfee","micropayment API","Base USDC API"],"warnings":["No API documentation available — all doc pages render only 'Connect wallet' with no content","No request body schema or response schema documented; unknown what data is returned after payment","The specific endpoint is for portfolio ID 7 only; unclear if other portfolio IDs are available or what they represent","No examples of successful responses exist in the crawl material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/portfolios/7/holdings","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/portfolios/7/holdings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or what 'portfolio 7 holdings' actually contains. Docs pages are empty. This is effectively a stub listing.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T08:53:43.516Z","embedding":[-0.035308838,-0.019607544,0.038757324,0.017791748,-0.00032305717,-0.023635864,-0.008995056,0.021072388,0.0670166,-0.06213379,0.0317688,-0.04751587,-0.014732361,-0.06451416,-0.009674072,0.0001655817,0.007232666,0.008117676,-0.045562744,0.055145264,0.030380249,-0.008338928,-0.013290405,0.025939941,-0.012123108,0.0010604858,-0.015640259,-0.013450623,-0.025741577,-0.035583496,0.037902832,-0.023864746,-0.008666992,0.030914307,-0.04269409,0.006175995,0.009338379,0.036010742,0.026290894,0.0021820068,0.019577026,-0.0574646,0.023468018,-0.01626587,-0.040222168,-0.009979248,0.032104492,-0.036376953,0.020492554,0.02482605,-0.03189087,-0.014480591,-0.019592285,0.024108887,0.019546509,0.020385742,0.027236938,0.009864807,-0.008857727,0.026885986,0.01084137,-0.05130005,0.0049095154,0.003490448,0.017669678,0.039886475,-0.02458191,0.052124023,-0.002664566,0.07159424,0.01763916,0.03503418,0.014503479,0.0058288574,-0.019592285,-0.017532349,-0.003932953,0.03829956,-0.0019006729,-0.037384033,-0.0031166077,0.0011663437,-0.056854248,-0.01499176,-0.038757324,-0.050567627,-0.012931824,0.013336182,-0.051330566,0.050231934,-0.08239746,0.009246826,-0.0045776367,0.00868988,0.003124237,-0.041809082,0.008758545,0.020614624,-0.015731812,0.018234253,0.0029754639,-0.023651123,-0.020599365,0.0032157898,0.013809204,0.056549072,-0.00024414062,0.041931152,0.0018463135,-0.009117126,-0.054534912,0.00095415115,-0.002532959,0.019226074,0.009094238,-0.008666992,-0.04559326,0.016113281,-0.03048706,0.023330688,-0.047668457,0.025741577,0.028778076,0.011474609,0.016998291,-0.032806396,-0.018951416,0.008934021,-0.03543091,-0.021194458,0.03479004,0.021194458,0.01838684,-0.008895874,-0.011543274,0.0049972534,-0.01914978,-0.028305054,-0.04147339,-0.029846191,0.036376953,-0.031433105,0.042510986,0.009613037,-0.0927124,0.021759033,-0.02508545,0.028884888,-0.0062332153,-0.019058228,0.014381409,0.025604248,-0.014961243,0.0072288513,-0.0067977905,-0.03543091,-0.025756836,0.036224365,-0.0045814514,0.027664185,0.0009822845,0.032043457,-0.018005371,-0.0019989014,0.02734375,0.031219482,-0.01689148,-0.066589355,-0.06756592,-0.039154053,0.017471313,-0.017211914,-0.007545471,-0.009483337,-0.012504578,-0.07287598,0.0030498505,-0.011543274,0.0002861023,-0.07171631,-0.007030487,-0.04498291,0.033111572,-0.013755798,-0.05621338,0.0016098022,-0.019683838,0.058013916,0.018753052,0.018798828,0.047698975,0.0008177757,0.047851562,0.05822754,-0.03652954,-0.016342163,-0.0054244995,-0.0012435913,-0.011360168,-0.012901306,0.00667572,-0.005092621,0.030944824,0.068725586,0.0053367615,-0.02444458,0.004688263,-0.05508423,-0.04800415,0.0005559921,0.024551392,0.0090789795,-0.035980225,0.0019931793,-0.028839111,-0.037597656,0.0055503845,0.0118637085,-0.003528595,0.062927246,0.015731812,0.042663574,0.035461426,0.006504059,-0.043395996,0.042297363,0.022644043,0.011421204,0.011512756,-0.05218506,0.018920898,0.0078048706,-0.018356323,0.0039901733,-0.007270813,0.018325806,-0.037841797,-0.0129470825,0.002714157,-0.005645752,-0.0075645447,-0.03363037,-0.0131073,0.029647827,0.012168884,-0.016845703,-0.03253174,-0.08862305,0.02053833,0.02468872,0.038604736,-0.010169983,-0.0054359436,-0.01864624,-0.0012683868,-0.04574585,0.023147583,0.06359863,-0.018554688,-0.01687622,0.015396118,-0.027893066,-0.038085938,-0.009475708,-0.0064315796,-0.011123657,-0.023330688,-0.0015974045,-0.054840088,0.009887695,0.010673523,0.031921387,0.030639648,-0.025375366,-0.051605225,0.000323534,-0.0206604,0.0072669983,-0.052703857,-0.0039520264,0.014251709,0.02154541,0.00017082691,0.020217896,0.029525757,-0.0046424866,0.021347046,0.009384155,-0.010826111,0.0151901245,-0.020568848,0.004047394,0.031921387,-0.051971436,0.02255249,-0.0025520325,0.055236816,-0.029846191,0.027389526,-0.0082473755,0.02960205,0.04437256,-0.015960693,-0.07513428,0.019042969,-0.0058021545,0.018112183,0.04006958,-0.025726318,-0.017120361,-0.03543091,0.05606079,-0.023208618,0.0067253113,0.000009953976,0.032684326,0.038604736,-0.009674072,-0.045196533,-0.040283203,-0.011871338,-0.031433105,0.020858765,-0.014419556,0.02368164,-0.013809204,0.014228821,-0.03466797,-0.00655365,-0.02696228,-0.0014066696,-0.017456055,-0.009063721,-0.009643555,-0.009605408,0.014389038,0.0034999847,-0.019439697,0.025634766,0.021575928,0.019699097,-0.0027446747,-0.02508545,-0.022338867,-0.008300781,-0.048187256,0.019104004,0.049560547,0.0011310577,0.022750854,-0.026931763,-0.010673523,0.013618469,0.004673004,0.04058838,-0.0082473755,-0.008903503,-0.062805176,-0.076171875,-0.031204224,-0.027130127,0.030410767,0.03201294,-0.005695343,0.033294678,0.014228821,-0.031066895,-0.052947998,0.025222778,-0.054260254,0.01537323,0.031433105,-0.028045654,-0.023025513,0.005584717,0.0036907196,0.01725769,0.04284668,0.02079773,-0.0060043335,0.047943115,0.011581421,0.014251709,0.010887146,0.025527954,0.0074882507,-0.011810303,0.0007696152,-0.04928589,-0.0004746914,0.020050049,-0.0030498505,-0.029876709,-0.0703125,0.021118164,0.028427124,0.06750488,0.031311035,0.017196655,0.0017929077,-0.041778564,-0.013313293,-0.039276123,-0.017944336,-0.039215088,-0.050750732,0.009422302,0.007247925,0.011978149,-0.020828247,0.037353516,-0.014785767,0.018127441,-0.031921387,0.061584473,-0.023803711,-0.012191772,0.0020542145,0.016036987,0.048217773,0.045318604,-0.023391724,0.03488159,0.006549835,-0.041107178,-0.0053863525,0.052703857,-0.022964478,-0.029418945,-0.060424805,-0.046447754,0.004180908,0.00042033195,-0.010360718,0.006713867,-0.004673004,0.042877197,0.0054855347,-0.03036499,-0.024368286,0.016708374,-0.0031032562,-0.060760498,-0.019927979,-0.038330078,0.0018720627,0.048309326,-0.013137817,-0.011306763,0.004173279,-0.011672974,0.0051994324,0.02885437,0.031021118,0.008972168,-0.028808594,0.013999939,-0.0015029907,-0.0022087097,0.008270264,0.035064697,0.032989502,0.016189575,0.0703125,0.020751953,-0.009239197,-0.060058594,-0.0015859604,-0.059051514,-0.008743286,0.042816162,-0.02670288,-0.0071144104,-0.029144287,-0.028839111,-0.011360168,0.013465881,-0.039398193,-0.019470215,0.0209198,-0.009559631,-0.029006958,-0.07562256,-0.035339355,0.020706177,0.07745361,0.018737793,0.0027236938,-0.02835083,-0.005634308,0.029388428,-0.004211426,0.02911377,-0.014022827,-0.008796692,-0.016967773,-0.02166748,-0.010414124,-0.011756897,0.016159058,0.023071289,0.005443573,0.008300781,0.022720337,0.005241394,-0.0013580322,-0.022415161,0.0012140274,0.0049552917,0.015548706,-0.001124382,0.054382324,-0.005695343,-0.019073486,-0.04647827,0.03527832,0.0115356445,0.03378296,-0.04055786,-0.0058898926,0.004459381,0.0065612793,-0.017486572,-0.026245117,0.010177612,0.007270813,-0.046142578,-0.061065674,0.04269409,-0.023025513,0.0058555603,0.015075684,-0.017456055,0.017868042,-0.01965332,0.008552551,-0.0035037994,-0.02218628,-0.026351929,-0.030532837,-0.018310547,-0.04675293,-0.03543091,-0.033447266,0.0390625,-0.014671326,0.03390503,-0.008995056,-0.031707764,0.021896362,0.02545166,0.021713257,0.015808105,-0.010139465,0.0071640015,0.044036865,0.01033783,-0.042510986,0.027648926,0.00013792515,0.005821228,0.014915466,0.040039062,0.018157959,-0.010284424,0.008583069,-0.004383087,-0.022628784,-0.03363037,-0.013412476,0.0051498413,0.0048713684,-0.018112183,-0.056518555,0.032836914,0.035064697,-0.046966553,-0.03768921,0.025024414,0.0004968643,-0.030975342,0.030181885,0.019561768,0.059692383,-0.026733398,0.032836914,0.0034713745,0.037872314,0.026885986,0.004535675,-0.00970459,0.002380371,-0.009223938,0.000854969,0.020004272,-0.015533447,0.0132751465,0.014129639,0.03894043,0.0030288696,-0.003025055,-0.022216797,-0.02142334,0.0093307495,-0.013023376,-0.024536133,0.04196167,0.009094238,0.021865845,0.003189087,0.027877808,0.0395813,0.0079193115,-0.007385254,-0.01071167,0.044677734,0.0011091232,0.009765625,0.0035247803,0.001865387,0.031677246,-0.049224854,-0.009262085,0.024993896,0.013069153,-0.02128601,-0.04119873,-0.024108887,0.010658264,0.027008057,0.014480591,-0.0005168915,0.0043792725,0.004005432,-0.022338867,-0.011734009,0.009918213,0.0058517456,-0.035888672,-0.060913086,0.0060195923,0.017227173,0.015609741,-0.011291504,0.026504517,-0.018692017,-0.0028305054,0.008529663,-0.042114258,0.0048332214,-0.0069503784,-0.0095825195,0.009155273,-0.013450623,0.015777588,-0.027267456,-0.05630493,0.00843811,0.0023384094,0.068359375,-0.043518066,0.002243042,0.0018529892,-0.009086609,0.0071640015,0.004245758,0.0054893494,0.043701172,0.021896362,0.04650879,-0.02999878,0.04724121,-0.03353882,0.021377563,-0.0045547485,-0.050994873,0.0025367737,-0.009010315,0.0021572113,0.047698975,-0.028411865,0.0015592575,-0.042541504,-0.036956787,-0.007896423,-0.051513672,0.024734497,0.024307251,0.049224854,-0.029418945,0.007068634,0.011268616,0.019165039,-0.013374329,-0.030593872,-0.013832092,0.012779236,0.009765625,0.023223877,-0.025314331,-0.014480591,-0.010139465,0.011886597,-0.030059814,-0.026885986,0.00390625,-0.0181427,-0.0057868958,0.017074585,-0.013137817,-0.020446777,-0.000027120113,-0.041748047,-0.009223938,-0.014076233,0.016067505,0.013389587,-0.009963989,-0.0129470825,0.032684326,-0.017562866,0.027923584,-0.0073928833,-0.00957489,-0.053955078,-0.009117126,0.0035533905,0.024856567,0.012519836,-0.024383545,-0.007671356,-0.021011353,-0.05908203,-0.0056991577,0.012565613,-0.0012025833,0.007106781,-0.012229919,-0.025421143,0.021224976,-0.025863647,-0.014053345,-0.007068634,-0.0074310303,0.015991211,0.00083589554,0.02734375,0.040893555,-0.012107849,-0.01612854,-0.008399963,0.009407043,0.01348114,0.045166016,0.029220581,-0.024917603,-0.022109985,0.01335144,0.0035953522,0.0009384155,-0.03982544,0.0095825195,-0.023086548,0.018173218,0.0009250641,0.01537323,-0.018432617,0.019317627,0.061431885,-0.002128601,-0.004650116,-0.0007176399,-0.013870239,0.030456543,0.04168701,-0.03744507,0.0038394928,-0.04119873,0.01461792,-0.02861023,0.03503418,0.0034389496,0.027694702,-0.012191772,-0.017959595,-0.0010681152,-0.0043640137,-0.0016927719,-0.038604736,-0.02243042,-0.06744385,-0.00434494,-0.0076789856,-0.031463623,0.0061531067,0.012825012,-0.020736694,-0.07055664,0.007671356,0.055847168,-0.0076904297,-0.003862381,0.0018787384,0.03225708,0.016494751,-0.034698486,-0.012771606,0.002878189,-0.03488159,-0.010345459,-0.050872803,0.025268555,-0.018447876,-0.006828308,0.022323608,0.012184143,0.024856567,-0.0076408386,0.027420044,-0.003211975,0.0075569153,-0.017868042,0.00024819374,-0.019256592,-0.022033691,0.04421997,-0.035888672,0.030410767,0.03543091,0.018737793,0.0030822754,0.008041382,0.03692627,-0.026168823,0.003353119,0.011764526,0.029220581,0.02178955,-0.009727478,0.011260986,0.016723633,0.0018510818,-0.01676941,-0.0063438416,-0.008705139,-0.026733398,-0.012329102,0.023620605,-0.004951477,-0.013160706,-0.006046295,0.011779785,0.009231567,0.008201599,0.019561768,-0.024749756,-0.004688263,-0.025100708,0.00014436245,0.009994507,-0.0005979538,-0.012191772,0.027923584,0.012367249,0.016311646,0.003276825,0.012763977,0.0040245056,0.050872803,-0.0030956268,-0.009086609,0.009300232,0.010070801,0.03463745,-0.013504028,0.01940918,-0.047546387,-0.003917694,-0.0050964355,0.009429932,-0.001821518,-0.03479004,0.008262634,-0.019760132,0.008430481,-0.014823914,-0.03692627,-0.013160706,-0.0101623535,-0.031982422,-0.008361816,-0.009780884,0.0031032562,0.0072288513,0.003686905,-0.0028495789,-0.013061523,0.026443481,-0.010917664,0.00881958,0.0345459,0.03286743,-0.0014438629,-0.02670288,-0.01838684,-0.01158905,-0.029693604,0.0038261414,-0.013137817,-0.013465881,0.029876709,0.024002075,0.0025119781,0.010940552,0.02923584,-0.016342163,0.0074501038,0.020217896,0.03555298,-0.021453857,0.014228821,-0.036346436,0.01158905,0.0018882751,0.025421143,0.005592346,-0.008972168,-0.00033640862,0.031341553,0.029922485,-0.0020599365,0.03265381,0.010757446,0.03579712,-0.015625,-0.014175415,-0.01335144,-0.009544373,-0.02267456,0.0010213852,-0.0014915466,0.0014591217,0.018630981,-0.00919342,0.009086609,-0.0362854,0.021224976,0.021636963,0.019638062,-0.046722412,-0.04107666,-0.014808655,-0.00095033646,-0.050567627,0.009803772,0.0027694702,0.042266846,0.020141602,0.035125732,0.011260986,0.007461548,0.018188477,-0.027770996,-0.03338623,-0.0044784546,-0.011856079,0.016616821,-0.0006327629,0.038604736,0.047973633,0.011299133,0.033416748,0.015640259,0.009269714,0.0112838745,0.004760742,-0.021118164,0.027648926,-0.014533997,0.017974854,0.013046265,0.04232788,-0.021453857,0.011062622,-0.0015544891,0.02835083,-0.039276123,0.025436401,0.08734131,0.024749756,-0.01007843,0.059295654,-0.023147583,-0.025436401,-0.0034275055,-0.007774353,0.057617188,-0.0045547485,0.027511597,0.046661377,0.0049819946,-0.0004863739,0.0055770874,-0.017501831,-0.02861023,0.050598145,0.03842163,-0.023117065,-0.009170532,-0.010635376,0.013160706,-0.04043579,-0.04046631,0.013824463,-0.0053596497,0.0032081604,-0.0023021698,0.0027542114,-0.015052795,0.001121521,0.03817749,0.00308609,-0.0116119385,0.037963867,0.025726318,-0.02142334,0.027389526,0.0007162094,0.027313232,-0.0054740906,-0.013008118,0.011802673,0.02168274,0.013450623,-0.02230835,0.023513794,-0.011474609,0.027114868,0.03704834,-0.020248413,0.011627197,0.02180481,-0.0015974045,0.001991272,0.037475586,0.023406982,0.011100769,0.04058838,0.034332275,0.02406311,-0.024932861,0.01687622,0.004501343,0.0079193115,-0.010635376,-0.0056610107,-0.0000923872,-0.029830933,0.020309448,0.0036525726,-0.024154663,0.036346436,0.0262146,-0.016235352,-0.010360718,-0.019973755,0.026855469,-0.023773193,-0.022827148,-0.009918213,-0.0069618225,0.023101807,0.04827881,0.031097412,-0.012840271,0.030563354,0.028778076,-0.017562866,-0.012557983,0.0112838745,-0.026290894,-0.01436615,-0.01008606,-0.015449524,-0.05078125,0.026428223,0.013145447,0.013923645,0.023620605,-0.00088596344,-0.0054969788,-0.0057754517,0.01777649,0.0068092346,-0.006591797,-0.0020694733,-0.012008667,0.010444641,0.048736572,-0.004562378,-0.0019512177,-0.012062073,-0.0066490173,0.015548706,-0.0056991577,-0.012611389,-0.00032043457,-0.005870819,-0.040618896,0.0045394897,0.027114868,-0.0001578331,0.06817627,-0.009391785,-0.021636963,0.0063476562,0.030899048,0.009613037,0.008300781,-0.007575989,0.017471313,-0.035125732,0.04309082,0.0340271,-0.0032901764,0.011039734,0.0045776367,-0.036224365,-0.00097084045,-0.0002169609,0.01411438,-0.022628784,-0.009880066,0.0011787415,0.03125,-0.016418457,-0.031097412,0.0026683807,-0.012207031,-0.014328003,-0.0231781,0.012229919,0.0014343262,0.021240234,0.017105103,0.026397705,-0.035736084,0.059143066,-0.016967773,0.036743164,-0.022567749,-0.0011663437,0.05316162,0.015151978,0.047698975,-0.00065517426,-0.003730774,-0.011550903,0.004901886,0.022842407,0.020004272,0.025009155,0.0010328293,-0.0066947937,0.03488159,0.002243042,0.022567749,0.0069122314,-0.0107803345,0.008308411,-0.013412476,-0.01309967,-0.0066490173,-0.006252289,0.015571594,0.019302368,-0.012039185,0.019332886,-0.027114868,0.0025844574,0.022201538,-0.0009279251,0.0046043396,-0.009513855,-0.023742676,0.032928467,-0.025100708,-0.024490356,-0.006877899,0.0072898865,-0.066223145,-0.016693115,0.012535095,0.010948181,-0.028640747,0.06173706,0.020004272,-0.0034713745,0.014503479,0.026885986,-0.0015068054,0.03149414,0.0061683655,0.045440674,0.047058105,0.015899658,-0.0018482208,0.03869629,0.005168915,-0.008628845,0.02078247,0.046051025,0.0038261414,0.033050537,-0.0028438568,-0.0039787292,0.010101318,0.001613617,-0.019454956,0.00774765,-0.019302368,-0.010826111,0.0011806488,0.018112183,-0.012191772,-0.007843018,-0.021820068,-0.005405426,0.009422302,0.030899048,0.01852417,-0.035217285,0.018234253,-0.006263733,-0.0006389618,-0.0021743774,-0.00051116943,-0.00082731247,-0.04067993,0.001581192,0.018615723,-0.0038585663,0.039886475,-0.02609253,-0.010566711,0.033294678,0.025680542,0.012763977,0.006416321,-0.0008368492,0.010406494,-0.0017337799,0.00484848,-0.008735657,-0.006839752,0.018569946,0.003753662,0.005973816,-0.011886597,0.02494812,-0.014289856,0.006778717,-0.00047159195,0.011169434,0.020889282,-0.019638062,-0.0032577515,0.011772156,0.03552246,-0.017318726,-0.019683838,-0.0011615753,0.020339966,0.07928467,0.0077285767,0.008018494,0.018035889,0.021118164,0.020202637,0.052337646,0.014251709,0.026672363,0.008522034,-0.010551453,-0.012054443,0.03845215,-0.005718231,-0.022399902,0.024261475,-0.042053223,-0.017791748,0.02758789,0.017196655,0.005760193,-0.03857422,-0.0016479492,-0.0077171326,-0.038269043,-0.008026123,-0.004825592,0.0037117004,-0.003293991,-0.0007619858,0.018661499,-0.0041275024,-0.031585693,-0.0058135986,-0.001625061,-0.02960205,-0.06335449,-0.010864258,-0.023925781,0.015472412,-0.025497437,0.00087833405,-0.0042762756,0.022201538,-0.021224976,-0.00024461746,-0.015457153,0.0043029785,0.036895752,0.013366699,0.01084137,-0.018432617,-0.03768921,-0.029876709,-0.011528015,-0.00095176697,0.037841797,-0.01524353,0.020553589,0.02923584,-0.0044670105,-0.0076026917,-0.0041160583,-0.0015544891,-0.01625061,-0.009277344,-0.015037537,0.013366699,0.014801025,0.00017428398,-0.00856781,0.03173828,-0.020233154,-0.03375244,0.0029125214,0.043884277,0.017929077,0.020339966,0.008163452,-0.010246277,-0.049072266,0.008422852,-0.02116394,0.0063171387,0.020401001,-0.010597229,0.008773804,0.02456665,0.026977539,-0.004749298,-0.00356102,0.042816162,0.027038574,0.0107803345,0.020629883,-0.0019435883,0.0072898865,-0.036621094,-0.022262573,-0.003314972,0.041503906,0.020370483,0.013671875,-0.017181396,-0.00014531612,-0.024139404,0.00919342,0.017059326,-0.021499634,-0.060516357,-0.018692017,-0.021408081,0.027816772,0.0076675415,0.0146102905,-0.029449463,0.018554688,-0.018493652,-0.028930664,-0.024917603,0.05029297,0.018157959,-0.026123047,-0.010276794,0.013412476,-0.005996704,-0.027359009,-0.007827759,-0.05670166,-0.027191162,-0.022399902,0.00006276369,0.02658081,0.0036621094,0.012878418,-0.0055389404,0.0011539459,0.0009975433,0.022644043,0.020095825,-0.015014648,-0.008651733,0.026138306,0.010002136,0.00045490265,0.0082092285,0.008705139,-0.0059547424,-0.0020523071,-0.012161255,0.0044670105,-0.030822754,0.02154541,0.021896362,0.0056915283,0.02911377,-0.02029419,0.027877808,-0.0042762756,0.01713562,-0.0146865845,-0.010749817,0.03439331,-0.02758789,-0.014457703,-0.0029125214,0.0025863647,-0.021347046,0.010902405,0.009895325,0.026123047,-0.029571533,0.03353882,-0.014457703,-0.021591187,0.020736694,0.008102417,-0.020141602,-0.006542206,0.017105103,-0.000038444996,-0.0046081543,-0.0022640228,-0.015357971,-0.02293396,-0.022766113,-0.014137268,-0.009346008,-0.0046920776,0.029647827,0.0026226044,0.056854248,0.017227173,0.016433716,0.01826477,0.012680054,0.029907227,0.0059661865,0.041931152,0.0063438416,-0.01663208,0.018447876,-0.0045051575,-0.011924744,0.0068092346,-0.016418457,0.022079468,-0.013999939,-0.002336502,-0.012229919,0.013450623,0.01449585,0.012825012,-0.0076141357,0.009414673,-0.043823242,-0.017059326,-0.01524353,-0.0007343292,0.019500732,0.018737793,0.004512787,-0.0013275146,-0.013221741,0.028762817,0.03994751,-0.016815186,-0.02482605,-0.0129470825,0.016952515,-0.0058555603,0.02268982,0.0079193115,-0.018630981,-0.011169434,-0.0152282715,-0.01524353,0.007774353,-0.027160645,0.02078247,0.0025691986,-0.0071029663,-0.021148682,0.02609253,-0.006336212,0.008399963,0.018722534,0.0039863586,0.029037476,0.015716553,-0.026504517,0.031021118,0.024627686,-0.030899048,0.05029297,0.02619934,-0.0075149536,0.010520935,-0.0041007996,-0.039489746,-0.025985718,-0.003458023,-0.008796692],"createdAt":"2026-04-18T18:53:24.229Z","updatedAt":"2026-04-27T17:05:04.965Z","lastSeenAt":"2026-04-27T17:05:04.965Z","tsv":"'/request':200 '0.02':10,22,112,199 '000':102 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':107 '20':101 '300':133 '402':183 '7':36 'Base USDC API' 'accept':73 'access':123 'across':51,202 'actual':188 'advertis':122,197 'ai/ml':54 'amount':98 'analyt':53 'api':50,116,142 'base':8,20,67,103,109 'broader':42 'call':49 'categori':58 'challeng':185 'commit':210 'confirm':178 'connect':150 'contain':174 'content':156 'crypto portfolio' 'data':3,15,32,52,189 'descript':167 'doc':140 'document':135 'endpoint':26,72,176,205 'equal':111 'exact':93 'exact-pay':92 'exampl':164 'extrem':137 'field':170 'finance/web3':55 'gate':125 'handl':81 'header':88 'hold':2,14,31,172 'id':35 'infrastructur':57 'inlin':82 'investment holdings' 'json':78 'json-api' 'key':117 'limit':120 'live':179 'lowpaymentfee' 'lowpaymentfee.com':28 'maximum':97 'micropay':6,18,128 'micropayment API' 'minimum':208 'network':9,21,68 'no-api-key' 'offer':44 'openapi':160 'page':145 'part':39 'pay':47 'pay-per-cal':46 'pay-per-request' 'payment':79,87,94,130,192 'per':11,23,48,113 'platform':43,196 'portfolio':1,13,30,34 'portfolio data' 'portfolio holdings API' 'portfolio-holdings' 'post':74 'price':141,201 'prompt':152 'proper':182 'protocol':64 'pure':126 'rate':119 'readm':144 'render':147 'request':12,24,75,114 'request/response':163 'requir':99 'respons':173 'return':29,77,180,190 'schema':161 'scheme':95 'second':134 'settl':60 'simpl':198 'spars':138 'timeout':131 'unit':104 'unknown':194 'usdc':70,106 'usdc-base' 'use':69,89 'various':45 'via':4,16,61,83 'wallet':151 'x':86 'x-payment':85 'x402':5,17,63,91,184 'x402 finance API' 'x402-payment'","prices":[{"id":"3ce3f9fb-1188-462f-98f1-e3d2e8b84fa8","listingId":"a1b6dba4-13ea-4a81-94f4-365e732f0987","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/7/holdings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:24.229Z"}],"sources":[{"listingId":"a1b6dba4-13ea-4a81-94f4-365e732f0987","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/portfolios/7/holdings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:24.229Z","lastSeenAt":"2026-04-27T17:05:04.965Z"}],"details":{"listingId":"a1b6dba4-13ea-4a81-94f4-365e732f0987","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/portfolios/7/holdings \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/portfolios/7/holdings"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/portfolios/7/holdings"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve holdings data for a specific portfolio via micropayment","Integrate portfolio data into trading bots or dashboards without API key management","Agent-driven portfolio analysis with per-call payment"],"bestFor":["Developers wanting keyless, pay-per-call access to portfolio data","AI agents that can settle x402 payments on Base","Low-volume or sporadic portfolio data lookups"],"notFor":["Users needing detailed API documentation or response schema before integrating","High-frequency bulk data retrieval where per-call pricing adds up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:58.481Z"},"updatedAt":"2026-04-27T17:05:04.965Z"}}