{"id":"4ff96e60-9fbd-4191-8b8c-d41f386bb8c7","shortId":"8RZPTR","kind":"x402","title":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" account balance resource via the x402 payment protocol. It is part of a broader platform that offers multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/accounts/48/balance` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 `exact` scheme with a 300-second timeout. No API keys or rate limits are required; access is granted purely through per-request payment.\n\nThe platform's documentation and auxiliary pages (docs, pricing, README) appear to be behind a wallet-connect gate and contain no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the \"balance\" resource actually returns beyond its MIME type of `application/json`. The endpoint is confirmed live (returns HTTP 402 with a valid x402 challenge).","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","account-balance","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","402 payment required"],"warnings":["No OpenAPI or schema documentation available for this endpoint","All documentation pages (docs, pricing, README) are behind a wallet-connect gate and contain no useful content","The meaning of 'accounts/48/balance' is unclear — it is unknown what account 48 refers to or what the response contains","The platform lists many API categories but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/48/balance","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/accounts/48/balance","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, but there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic listing page. The purpose of the 'balance' resource for 'account 48' is unexplained. Docs, pricing, and README pages are all gated behind wallet-connect with no content.","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":"2026-04-19T00:34:31.156Z","embedding":[-0.0096206665,0.008560181,0.049072266,0.015808105,0.019439697,-0.037017822,-0.0057754517,0.014350891,0.07849121,-0.070617676,0.041625977,-0.048980713,-0.035461426,-0.023010254,-0.022155762,0.027130127,-0.020690918,0.028701782,-0.062561035,0.045928955,0.005470276,-0.018096924,-0.004802704,0.067871094,-0.007751465,-0.026626587,0.006526947,-0.032714844,-0.03845215,-0.039154053,0.027999878,-0.021408081,-0.0056266785,0.02444458,0.019500732,0.0051460266,-0.004676819,0.043029785,0.04156494,-0.010643005,-0.012359619,-0.046051025,0.0104522705,0.010726929,-0.028152466,0.004070282,0.016662598,-0.034606934,-0.007286072,-0.013504028,-0.04260254,0.017044067,0.011001587,0.013374329,0.017471313,0.036010742,-0.002784729,-0.014373779,0.020553589,0.024841309,0.0028762817,-0.045928955,-0.020568848,0.008110046,0.018051147,0.0569458,-0.005241394,0.04232788,0.009819031,0.046203613,0.015129089,0.06628418,0.03643799,0.007549286,-0.0009994507,-0.02619934,0.010848999,0.038360596,-0.009674072,-0.042388916,-0.01663208,-0.03237915,-0.083740234,-0.013412476,-0.016235352,-0.053466797,-0.016067505,0.018203735,-0.021850586,0.053100586,-0.06982422,-0.011680603,0.0007991791,0.024307251,0.0011863708,-0.03579712,-0.0138168335,0.0152282715,-0.0061531067,0.0038471222,0.014472961,-0.025650024,0.03112793,-0.008300781,0.04977417,0.047027588,0.011207581,0.015686035,-0.007785797,-0.011795044,-0.0152282715,0.0016317368,0.003238678,-0.039855957,0.021972656,0.004749298,-0.02243042,0.0116119385,-0.023712158,0.010879517,-0.03616333,0.070617676,0.022125244,-0.01751709,0.0158844,-0.050872803,-0.026046753,0.0070877075,-0.03213501,0.009407043,0.02368164,0.009933472,0.017471313,-0.016418457,-0.032836914,0.009597778,-0.021102905,-0.02999878,-0.026535034,0.00019335747,0.035186768,-0.022033691,0.024276733,0.009666443,-0.09741211,-0.008003235,-0.03878784,0.011856079,-0.032226562,0.00059890747,-0.003484726,0.0062294006,-0.0137786865,-0.0018482208,-0.017456055,-0.030548096,-0.00762558,0.029006958,0.011482239,0.04486084,0.007232666,0.029922485,0.030944824,-0.003074646,0.043182373,0.04473877,-0.022125244,-0.06402588,-0.07891846,-0.025253296,0.002696991,-0.026473999,-0.035491943,-0.010009766,-0.0084991455,-0.07861328,-0.025100708,-0.0042686462,-0.02519226,-0.021072388,0.0018033981,-0.025909424,0.0135650635,-0.006538391,-0.056518555,-0.004463196,-0.008003235,0.053466797,0.025009155,0.015075684,0.010177612,-0.003440857,0.03857422,0.03173828,-0.011932373,-0.030395508,0.011726379,-0.0029125214,0.02255249,0.018417358,0.028305054,-0.019256592,0.036956787,0.047790527,-0.017181396,-0.008110046,0.021575928,-0.039031982,-0.047912598,-0.012924194,0.011665344,0.017105103,-0.01272583,-0.005596161,-0.02709961,-0.012268066,0.006412506,0.016311646,0.00623703,0.0692749,-0.011077881,0.0066566467,0.011779785,0.015129089,-0.05065918,0.030197144,0.06567383,0.03527832,-0.0118637085,-0.023025513,0.014465332,0.010925293,-0.032684326,-0.0028800964,-0.012786865,0.035858154,0.012962341,0.022003174,0.026809692,-0.011779785,-0.00907135,-0.019378662,0.008743286,0.024765015,0.020019531,-0.01676941,-0.045013428,-0.078186035,0.05102539,0.06842041,0.011360168,-0.0059127808,-0.0026798248,-0.031097412,-0.021514893,-0.04989624,0.039794922,0.06341553,-0.015548706,-0.026977539,0.038208008,-0.021987915,-0.031799316,-0.037963867,-0.0032157898,-0.009651184,-0.016921997,-0.0016546249,-0.06982422,0.013511658,0.0052948,0.027679443,0.04156494,-0.005619049,-0.05709839,-0.022232056,0.01411438,0.010643005,-0.028533936,0.011474609,-0.010276794,0.027130127,0.02999878,-0.0005531311,0.019180298,0.0017080307,-0.011695862,0.003753662,0.027877808,-0.0051498413,-0.019561768,0.02658081,0.0135269165,-0.04232788,0.01828003,0.01008606,0.039245605,-0.035888672,0.03994751,-0.02142334,0.005622864,0.047424316,-0.003932953,-0.05053711,0.01953125,-0.00090169907,0.05606079,0.057006836,0.026184082,0.0006284714,-0.005065918,0.059692383,-0.008094788,0.012626648,0.03074646,0.04248047,0.025924683,-0.004535675,-0.06427002,-0.039276123,0.008255005,-0.018005371,0.027023315,-0.027679443,0.027450562,-0.00869751,0.030258179,-0.015930176,0.00390625,-0.045837402,-0.0032157898,-0.008514404,0.0051956177,-0.027709961,-0.016952515,0.012130737,0.018188477,-0.014137268,-0.01713562,0.045837402,0.017074585,-0.018814087,-0.0022716522,-0.032714844,-0.02947998,-0.031433105,0.022476196,0.015136719,0.011650085,0.0096588135,-0.025985718,0.0027980804,0.016220093,-0.0060768127,0.05279541,0.013679504,0.008796692,-0.047058105,-0.051116943,-0.018753052,-0.035003662,0.017623901,0.019973755,-0.00012266636,0.060791016,-0.00063467026,-0.020767212,-0.024261475,0.034484863,-0.04763794,0.0027065277,0.026000977,-0.031311035,-0.025909424,-0.0067634583,0.013092041,0.026611328,0.027496338,0.018081665,0.0137786865,0.081970215,0.055145264,0.013465881,0.010818481,0.02949524,0.028152466,-0.0061531067,0.002155304,-0.025772095,-0.009231567,0.025634766,-0.014678955,-0.02154541,-0.08453369,0.06390381,0.013504028,0.09100342,0.010116577,0.0033073425,0.03250122,-0.025436401,0.0287323,-0.05026245,-0.041656494,-0.03112793,-0.043640137,0.018600464,-0.005859375,0.0028457642,-0.039123535,0.022598267,0.020889282,0.020965576,-0.035858154,0.06286621,-0.009101868,-0.020736694,0.024490356,0.013198853,0.036254883,0.024597168,-0.028579712,0.0073051453,-0.0060577393,-0.03186035,-0.02885437,0.023040771,-0.0007991791,-0.019226074,-0.051361084,-0.01965332,0.01210022,-0.017471313,-0.07080078,-0.008460999,0.008590698,0.030044556,0.009925842,-0.022277832,-0.029373169,0.0076141357,-0.019210815,-0.07543945,-0.006942749,-0.023925781,0.007511139,0.0357666,-0.040802002,0.02407837,0.012741089,0.022140503,-0.016067505,0.014625549,-0.014854431,-0.005027771,-0.010627747,0.030380249,0.011650085,0.026229858,0.016586304,0.052947998,0.035888672,0.015686035,0.03881836,0.022949219,0.008392334,-0.040527344,0.013999939,-0.0725708,0.008773804,0.020858765,-0.017944336,0.012672424,-0.01838684,-0.02027893,-0.014053345,0.00907135,-0.014678955,0.013664246,0.037506104,-0.047851562,-0.030853271,-0.05255127,-0.02645874,0.0038719177,0.073791504,0.01550293,-0.004085541,-0.034484863,-0.017349243,0.01612854,0.008308411,0.0016937256,-0.013076782,-0.0033283234,-0.040405273,-0.012901306,-0.030303955,-0.0003361702,0.031143188,0.004917145,-0.010322571,0.015235901,-0.004840851,-0.0004544258,-0.027175903,0.0006966591,0.02003479,-0.026397705,0.014350891,-0.021911621,0.015525818,-0.002632141,-0.023086548,-0.059509277,0.03930664,-0.0043029785,0.037506104,-0.031311035,0.0037136078,0.004299164,0.022338867,0.011001587,-0.024612427,-0.009460449,0.008453369,-0.019195557,-0.09765625,0.05166626,-0.019821167,0.019683838,0.004257202,-0.01209259,0.039489746,-0.005256653,0.015701294,0.018829346,-0.024154663,-0.01222229,-0.038604736,-0.023422241,-0.023345947,0.0005464554,-0.00957489,0.012413025,-0.011779785,0.008552551,-0.014137268,-0.026931763,0.022064209,-0.012275696,-0.001543045,0.014427185,0.0037345886,0.0038223267,0.04736328,0.01876831,-0.057006836,0.0395813,-0.005268097,-0.009208679,-0.010375977,0.05355835,0.016799927,-0.013389587,0.002532959,-0.0026054382,-0.007549286,-0.025054932,-0.0072135925,0.010032654,0.05404663,0.01878357,-0.030227661,0.0029144287,0.021087646,-0.03652954,-0.011230469,0.027008057,0.026733398,-0.052703857,0.018478394,0.018432617,0.034210205,-0.03250122,0.005531311,-0.003993988,0.029876709,0.019073486,0.018615723,0.00025248528,0.017120361,-0.01374054,0.022857666,0.00504303,-0.027053833,-0.017745972,0.0016298294,0.02041626,0.01727295,-0.00096321106,-0.00944519,-0.01802063,-0.014587402,-0.00014221668,-0.019302368,0.02708435,0.011604309,0.014297485,-0.0031547546,0.0095825195,0.028869629,-0.0418396,0.00088500977,-0.0047721863,0.045318604,0.0022506714,-0.013053894,0.026123047,0.0056762695,0.036499023,-0.03451538,-0.026535034,0.0007581711,0.0012044907,-0.013214111,-0.06161499,-0.013679504,-0.015289307,0.020217896,-0.002790451,-0.0042915344,0.035736084,-0.009925842,-0.0007891655,0.015792847,0.016418457,-0.008529663,0.0010995865,-0.05621338,-0.003479004,-0.015808105,-0.0074768066,-0.028808594,0.018051147,-0.036224365,-0.016525269,0.0006160736,-0.02243042,0.0072021484,-0.012565613,-0.0008993149,0.027572632,-0.01687622,0.0056991577,-0.015686035,-0.021499634,-0.008911133,0.003753662,0.022888184,-0.052093506,0.010925293,-0.010215759,0.004814148,-0.009490967,-0.0010232925,0.015686035,0.009941101,0.008468628,0.03982544,-0.045440674,0.028198242,-0.030731201,-0.0042304993,-0.006126404,-0.0077323914,0.0029392242,-0.014472961,-0.013305664,0.04019165,-0.0030994415,-0.0040359497,-0.017669678,-0.029251099,-0.011642456,-0.050323486,0.026824951,0.013015747,0.05102539,-0.026184082,-0.0065078735,0.028305054,0.023086548,-0.0054130554,-0.0118637085,-0.004398346,0.026351929,0.009307861,0.0051193237,-0.02494812,-0.017929077,-0.015296936,0.00052022934,-0.05142212,-0.041229248,-0.014801025,0.02116394,0.016098022,-0.012771606,-0.021438599,-0.022476196,-0.0024299622,-0.021530151,0.010177612,-0.01979065,0.020248413,0.0038967133,-0.009346008,0.008453369,0.000916481,-0.032562256,0.035461426,0.009651184,-0.014549255,-0.02482605,-0.019439697,0.02204895,-0.0012397766,-0.0055160522,-0.037475586,-0.019607544,-0.023529053,-0.06262207,0.016830444,-0.0023841858,0.03152466,-0.00907135,-0.004627228,-0.049865723,-0.0158844,-0.033935547,-0.0053100586,0.011512756,0.009391785,0.008483887,0.022949219,-0.0037727356,-0.005317688,-0.009902954,-0.023727417,-0.007499695,0.009101868,-0.0021400452,0.015174866,0.04071045,-0.00434494,-0.012863159,0.0034942627,-0.0027103424,0.025421143,-0.020477295,-0.008415222,-0.00029945374,0.02279663,-0.011474609,-0.012031555,-0.033172607,0.00422287,0.07159424,-0.015777588,-0.010131836,-0.014434814,-0.0015192032,0.022628784,0.046539307,-0.037109375,0.010536194,-0.02720642,0.032440186,-0.026626587,0.016021729,0.00017464161,0.025558472,-0.022628784,-0.048431396,-0.004306793,0.046203613,-0.016662598,-0.06506348,-0.015266418,-0.06994629,-0.009162903,-0.022949219,-0.014190674,0.0027313232,-0.0013380051,-0.03338623,-0.05731201,0.0127334595,0.045043945,0.005241394,0.018234253,-0.00097322464,0.010063171,0.026931763,-0.02394104,-0.024917603,0.010322571,-0.02468872,-0.012825012,-0.022537231,0.032989502,-0.013137817,-0.023712158,0.0259552,-0.0038337708,0.012245178,-0.006790161,0.01158905,-0.0152282715,-0.0016584396,-0.0052452087,0.002817154,0.0047340393,-0.013954163,0.021835327,-0.05316162,0.024139404,0.0055160522,0.016799927,0.002193451,0.012374878,0.026229858,-0.0435791,-0.0054130554,0.008605957,-0.002779007,0.023742676,-0.014762878,0.04220581,0.01600647,-0.00970459,0.013900757,-0.026947021,-0.0132369995,-0.04147339,-0.038726807,0.024353027,-0.0064430237,0.014762878,-0.01852417,0.0011034012,0.011550903,-0.00274086,-0.0107421875,-0.008857727,0.001950264,-0.014213562,0.025512695,-0.003753662,0.024719238,0.011390686,0.020324707,0.043701172,0.047790527,0.008140564,0.00051498413,-0.0047416687,0.015541077,-0.030181885,-0.005317688,0.010345459,0.020935059,0.0041542053,0.015060425,0.023162842,-0.036956787,-0.028778076,-0.0042915344,-0.021987915,0.015274048,-0.021057129,0.019226074,0.0024986267,0.016342163,-0.021102905,-0.025024414,-0.0012807846,-0.02658081,-0.008148193,-0.005882263,0.007827759,0.01133728,0.013687134,-0.012519836,0.00029850006,-0.0063667297,0.032928467,-0.0060577393,-0.009124756,0.026229858,0.05316162,0.010444641,-0.018615723,-0.0050849915,-0.0070266724,-0.009986877,0.0012226105,-0.003293991,0.020645142,0.037078857,-0.012863159,0.034698486,-0.016159058,0.051208496,-0.008178711,0.014625549,0.002462387,0.0146865845,0.01625061,0.045074463,-0.031585693,0.0028038025,0.010398865,-0.021362305,-0.012992859,-0.018951416,-0.013542175,0.006336212,0.0064201355,-0.008857727,0.020462036,0.013824463,0.022201538,-0.038909912,-0.016067505,0.004432678,-0.04232788,-0.032318115,0.0003476143,-0.022079468,-0.013267517,0.014373779,-0.022125244,0.005859375,-0.0206604,0.021209717,0.008056641,0.009544373,-0.009490967,-0.014724731,-0.014816284,-0.013061523,-0.02330017,0.010498047,-0.010154724,0.046447754,0.032440186,0.026626587,0.029525757,0.032958984,0.006439209,-0.046203613,-0.018630981,0.015159607,-0.0067825317,0.013267517,-0.029251099,0.05331421,0.055511475,0.0048599243,0.02015686,0.038330078,0.03805542,-0.009490967,0.0118255615,-0.012413025,0.020126343,-0.020828247,0.015151978,-0.0073242188,0.03463745,-0.023757935,0.01826477,-0.0030918121,0.020202637,-0.02859497,0.018936157,0.070739746,0.024154663,-0.006969452,0.03475952,-0.016342163,-0.008384705,-0.008621216,-0.017791748,0.05038452,0.0038375854,0.025222778,0.022491455,0.008514404,-0.024047852,0.047576904,-0.0040512085,-0.038757324,0.055999756,0.004295349,-0.008895874,-0.008483887,-0.0016889572,0.019622803,-0.060760498,-0.022201538,0.033355713,-0.013061523,0.012763977,-0.0036754608,0.009399414,0.017288208,0.014160156,-0.0010070801,0.021362305,-0.011634827,0.0038166046,0.017868042,0.009628296,0.021148682,0.020751953,0.039855957,-0.026046753,-0.011009216,0.0010004044,0.020584106,0.015991211,-0.0069122314,0.03338623,0.025527954,0.039276123,0.031082153,-0.017974854,-0.0046310425,0.02619934,0.0063934326,0.0015611649,0.04525757,0.015487671,0.02557373,0.04284668,0.041748047,0.02255249,-0.02154541,0.013076782,-0.004333496,0.004825592,-0.012878418,-0.0019721985,0.014640808,-0.013748169,0.025238037,0.0046081543,0.0060691833,0.0079193115,0.024291992,-0.019058228,-0.004623413,0.0074806213,0.003282547,-0.0011634827,-0.00548172,0.015235901,-0.02557373,0.007549286,0.023086548,0.018096924,-0.043640137,0.0138549805,0.0034694672,-0.021224976,-0.005004883,0.015335083,-0.05630493,0.009277344,0.005821228,-0.013839722,-0.026855469,0.011947632,0.017730713,-0.013053894,0.03414917,0.0135650635,-0.00020217896,0.008728027,0.017807007,0.030975342,0.0038032532,-0.0057907104,-0.012466431,0.0041046143,0.03942871,-0.013717651,-0.009887695,-0.034118652,0.0019760132,0.02999878,-0.021499634,-0.010910034,0.007686615,-0.005279541,-0.020614624,-0.00058841705,0.036102295,0.003572464,0.029525757,-0.016799927,-0.0055503845,0.008743286,0.042144775,0.0061416626,-0.01600647,-0.030654907,0.025482178,-0.022079468,0.039794922,0.053771973,-0.021697998,0.010887146,0.0011034012,-0.02204895,-0.007545471,-0.024414062,0.016571045,-0.036010742,0.0075263977,0.01285553,0.026428223,-0.02178955,-0.013137817,-0.0096588135,-0.022750854,-0.015792847,-0.015899658,0.0066833496,0.0054779053,0.02268982,0.015930176,0.026535034,-0.0056991577,0.058898926,-0.009552002,0.06628418,-0.0042381287,0.0007829666,0.04534912,0.02947998,0.035339355,0.010650635,0.02279663,-0.010765076,0.0023326874,0.011756897,0.012207031,0.012718201,0.009773254,-0.0038280487,0.046966553,-0.022903442,0.030899048,-0.0054130554,-0.008659363,0.0078048706,-0.012542725,-0.014862061,0.011711121,-0.010398865,-0.00028419495,0.05215454,-0.017456055,-0.007270813,-0.0126571655,-0.019348145,0.0259552,-0.0044174194,0.0022850037,-0.009468079,-0.015472412,0.017578125,-0.014923096,-0.0029640198,0.019439697,0.0181427,-0.032684326,-0.024536133,0.0101623535,0.026306152,-0.037384033,0.044952393,0.025726318,-0.0029563904,0.0062713623,0.0574646,-0.0028324127,0.025360107,0.011543274,0.05380249,0.03527832,0.010108948,0.0000054836273,0.028076172,0.030426025,-0.014572144,0.01586914,0.03515625,0.010482788,0.0071640015,-0.009422302,-0.0124053955,0.0071640015,-0.0025730133,-0.024765015,-0.009208679,-0.02645874,-0.010749817,0.0009174347,0.01423645,-0.0033817291,0.011695862,-0.0068740845,-0.012329102,0.015197754,0.034088135,0.018707275,-0.044677734,-0.00058555603,0.0110321045,0.011695862,-0.020736694,-0.02645874,0.011993408,-0.05432129,0.0067329407,0.0259552,-0.0012321472,0.0052223206,-0.023773193,-0.0019035339,0.060791016,0.020889282,0.00166893,0.011100769,-0.022750854,0.024398804,0.0027008057,0.010795593,0.0015354156,-0.012954712,-0.00075387955,0.01977539,-0.013916016,-0.016983032,0.007106781,0.013137817,0.0058517456,-0.00037932396,0.010253906,0.021408081,-0.009429932,-0.009155273,0.009147644,0.021133423,-0.02658081,-0.033935547,-0.014175415,0.027908325,0.052093506,-0.01499176,-0.0026435852,-0.02330017,0.034820557,0.03189087,0.031097412,0.000790596,0.04977417,0.011009216,-0.0013551712,-0.0184021,0.021026611,-0.00667572,-0.018463135,0.017929077,-0.019882202,-0.0025691986,-0.006111145,0.01600647,-0.00042629242,-0.015602112,-0.011199951,-0.013114929,-0.0043792725,0.0234375,-0.02619934,0.017654419,-0.034698486,-0.0151901245,0.026779175,0.008049011,-0.021133423,-0.038726807,-0.0068244934,-0.014060974,-0.057617188,0.014404297,-0.012374878,-0.011230469,-0.01600647,0.0041503906,-0.0071258545,0.032562256,0.0025844574,-0.0027751923,0.0031795502,0.023162842,0.008216858,-0.008346558,0.037506104,-0.014526367,-0.023239136,-0.0065460205,-0.009597778,0.005268097,0.01777649,-0.03112793,0.044067383,0.012962341,-0.00051546097,0.0024261475,-0.018951416,-0.008216858,-0.001496315,-0.05154419,-0.030151367,0.011474609,0.01651001,0.004497528,0.0018310547,0.054595947,-0.016998291,-0.024612427,0.024032593,0.0446167,0.0031013489,0.06402588,-0.029083252,-0.0045280457,-0.03189087,0.0029850006,-0.0053100586,0.010986328,0.008674622,0.009307861,0.0076942444,0.019226074,0.028274536,-0.02494812,-0.008865356,0.033172607,0.023330688,-0.008514404,0.042785645,0.0178833,0.0030441284,-0.022277832,-0.0034313202,-0.003753662,0.035308838,0.019836426,0.017578125,-0.027435303,0.008781433,0.0004069805,0.012245178,0.030731201,-0.029647827,-0.040740967,-0.014724731,-0.026947021,0.011764526,0.00541687,0.014190674,-0.012825012,0.0049438477,-0.03543091,-0.025466919,-0.028747559,0.019439697,0.018966675,-0.010620117,0.0022296906,0.0020503998,-0.0048332214,-0.036346436,0.0017442703,-0.058166504,-0.02017212,-0.009292603,-0.0109939575,0.019210815,0.009178162,-0.013374329,0.013038635,0.019332886,-0.012084961,0.011062622,0.023483276,-0.004135132,-0.007896423,0.030273438,0.007587433,-0.012023926,-0.0012931824,-0.011642456,-0.0076141357,0.03479004,-0.0022945404,0.012275696,-0.00932312,0.008934021,0.012336731,0.0046424866,0.026260376,-0.018417358,0.020477295,-0.025650024,-0.016601562,0.0010566711,-0.008293152,0.024993896,0.0005812645,-0.026184082,-0.01727295,-0.010910034,-0.021972656,0.021514893,0.011474609,0.037322998,-0.0024051666,0.047424316,-0.02470398,-0.013412476,0.018005371,0.006340027,-0.01838684,-0.004600525,0.02267456,-0.0051193237,0.025726318,0.003627777,0.0041122437,-0.03338623,-0.0129776,-0.01184845,-0.01828003,-0.017929077,-0.00025749207,0.018112183,0.021438599,0.008651733,0.01133728,0.028930664,0.009735107,0.03189087,0.00868988,0.05130005,0.020935059,-0.018737793,0.011016846,0.012710571,-0.029296875,0.004299164,-0.013504028,0.02355957,-0.036956787,-0.0054473877,-0.0135650635,0.03894043,-0.017349243,0.014389038,-0.010307312,-0.010734558,-0.048797607,-0.0028495789,-0.051452637,0.008995056,0.010848999,0.021453857,0.0124053955,0.016464233,-0.035491943,0.0075683594,0.03086853,-0.0019464493,-0.04660034,-0.017410278,0.0067749023,0.008026123,-0.004070282,0.023406982,-0.030151367,-0.017959595,-0.0033855438,0.010131836,-0.0073928833,-0.020568848,0.023513794,0.03604126,-0.015052795,-0.021377563,0.02432251,0.01612854,-0.0035743713,0.0060310364,0.0004901886,0.037109375,0.039398193,-0.004398346,0.028625488,0.01776123,-0.031082153,0.055908203,-0.0059509277,0.02645874,-0.01902771,-0.015731812,-0.023086548,-0.016998291,0.014564514,-0.00029444695],"createdAt":"2026-04-18T18:39:43.178Z","updatedAt":"2026-04-28T06:33:39.588Z","lastSeenAt":"2026-04-28T06:33:39.588Z","tsv":"'/api/v1/accounts/48/balance':83 '0.02':10,24,109 '000':99 '0x8335':104 '20':98 '300':126 '402':202 '402 payment required' '6':114 'Base network API' 'USDC pay-per-call' 'accept':84 'access':37,137 'account':4,18,38 'account balance API' 'account-balance' 'actual':187 'addit':168 'advertis':93 'ai':60 'analyt':59 'api':36,56,130 'appear':156 'application/json':194 'auxiliari':151 'balanc':5,19,39,185 'base':8,22,78,100,106 'behind':70,159 'beyond':189 'broader':51 'categori':57 'challeng':92,207 'confirm':198 'connect':163 'contain':166 'cost':96 'crypto payment API' 'data':58 'decim':115 'descript':181 'detail':170 'doc':153 'document':149 'endpoint':6,20,30,82,196 'equal':108 'exact':122 'exampl':178 'financ':63 'gate':3,17,69,164 'grant':139 'http':201 'infrastructur':66 'json':89 'json-response' 'key':131 'learn':62 'limit':134 'live':199 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':61 'made':118 'maximum':95 'micropay':72 'mime':191 'multipl':55 'network':79 'no-api-key' 'offer':54 'openapi':174 'page':152 'part':48 'pay':9,23 'payment':44,116,145 'per':11,25,110,143 'per-request':142 'per-request-micropayment' 'platform':52,147 'post':85 'premium':35 'price':154 'protocol':45 'provid':33 'pure':140 'rate':133 'readm':155 'request':12,26,86,111,144 'request/response':177 'requir':136 'resourc':40,186 'return':88,188,200 'schema':175 'scheme':123 'second':127 'settl':73 'specif':81 'technic':169 'timeout':128 'type':192 'unit':101 'usdc':14,28,75,103,112 'usdc-base' 'use':113 'util':67 'valid':205 'via':41,119 'wallet':162 'wallet-connect':161 'web3':64 'x402':2,16,43,71,91,121,206 'x402 micropayment API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"59e56d43-1f0b-42f2-af26-989957bfc6cf","listingId":"4ff96e60-9fbd-4191-8b8c-d41f386bb8c7","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/accounts/48/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:43.178Z"}],"sources":[{"listingId":"4ff96e60-9fbd-4191-8b8c-d41f386bb8c7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/48/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:43.178Z","lastSeenAt":"2026-04-28T06:33:39.588Z"}],"details":{"listingId":"4ff96e60-9fbd-4191-8b8c-d41f386bb8c7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/48/balance \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base network with exact scheme","source_url":"https://lowpaymentfee.com/api/v1/accounts/48/balance"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/48/balance"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying account balance data for account ID 48 via a single paid request","Demonstrating x402 micropayment integration on Base network","Agent-driven balance lookups without API key provisioning"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC micropayments on Base","Use cases needing keyless, pay-per-call API access"],"notFor":["Users needing detailed API documentation or schema before integrating","High-volume balance queries where $0.02/request adds up significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.104Z"},"updatedAt":"2026-04-28T06:33:39.588Z"}}