{"id":"d47629cc-5302-4556-80e9-5b1d11c90ba0","shortId":"axH8fp","kind":"x402","title":"x402-gated account balance endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated account balance endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/24/balance` is gated behind a per-request USDC payment on the Base network. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD) per request, consistent with the provider's advertised flat $0.02/request pricing across all their API endpoints.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of x402-gated APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model with no API keys, no rate limits, and no minimum commitments required — payment is handled entirely via the x402 protocol using USDC on Base.\n\nThis particular endpoint appears to return account balance information in JSON format. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the balance response contains or what parameters the POST request accepts. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to use without experimentation.","tags":[],"capabilities":["x402-payment","usdc-on-base","account-balance","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 API","USDC micropayment API","pay-per-call API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema available — request parameters and response format are unknown","The endpoint path references a hardcoded account ID (24); unclear if this is parameterizable","No request or response examples available anywhere in crawled content","The broader API suite advertises many endpoints (AI, finance, utils) but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/24/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/24/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet' with no content. There is no OpenAPI schema, no request/response examples, and no description of what this specific balance endpoint returns or accepts. The endpoint's purpose ('Premium API Access' for account 24 balance) is vague.","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":"2026-04-19T00:17:13.532Z","embedding":[-0.0126571655,0.008453369,0.039886475,0.010368347,0.022628784,-0.032562256,0.00030326843,0.012161255,0.073913574,-0.0602417,0.042755127,-0.06112671,-0.033935547,-0.029953003,-0.0048561096,0.024261475,-0.024536133,0.026733398,-0.06573486,0.035003662,0.014137268,-0.030303955,-0.010902405,0.043670654,-0.021453857,-0.024093628,-0.00422287,-0.023208618,-0.036102295,-0.03488159,0.044952393,-0.021697998,-0.0010499954,0.004348755,0.015151978,0.016662598,0.01374054,0.029769897,0.0463562,-0.01486969,-0.011474609,-0.05050659,0.0065307617,0.0022220612,-0.015510559,0.0066337585,0.025894165,-0.029190063,0.008399963,-0.017837524,-0.04815674,0.021362305,0.028442383,0.01651001,0.0023174286,0.018585205,-0.0046577454,-0.018814087,0.02078247,0.034729004,-0.0011529922,-0.05899048,-0.011497498,0.0012149811,0.015899658,0.0491333,0.0029449463,0.043518066,-0.0126571655,0.056549072,0.018127441,0.066345215,0.036346436,0.00080394745,0.007320404,-0.026565552,0.016586304,0.020889282,-0.023635864,-0.040863037,-0.016296387,-0.028396606,-0.08911133,-0.017578125,-0.015510559,-0.051879883,-0.022918701,0.006587982,-0.032714844,0.05126953,-0.08325195,-0.024093628,0.0109939575,0.022537231,0.014526367,-0.043304443,-0.0033931732,0.02494812,0.0023498535,-0.008468628,-0.00484848,-0.016296387,0.03262329,-0.018051147,0.0446167,0.04324341,0.016494751,0.0052604675,-0.008758545,-0.00010532141,-0.031951904,-0.004295349,-0.0023212433,-0.033172607,-0.0009560585,0.007347107,-0.035217285,0.010681152,-0.023132324,0.014732361,-0.03668213,0.07269287,0.018218994,-0.00055122375,0.023330688,-0.057556152,-0.014183044,0.020721436,-0.04031372,0.0075912476,0.037353516,0.004714966,0.002828598,-0.019821167,-0.0519104,0.018417358,-0.022033691,-0.022842407,-0.03265381,-0.0010223389,0.028366089,-0.017822266,0.018295288,0.0076904297,-0.0960083,-0.0056037903,-0.026763916,0.013786316,-0.035095215,0.002872467,0.00579834,0.020385742,-0.0041656494,-0.015487671,-0.022445679,-0.024383545,0.0010461807,0.020751953,0.0037155151,0.055755615,0.009185791,0.03286743,0.040130615,0.006462097,0.0181427,0.0335083,-0.013267517,-0.062805176,-0.07287598,-0.021865845,0.0034732819,-0.034576416,-0.029876709,-0.00091457367,-0.022613525,-0.06008911,-0.00566864,-0.0018205643,-0.021621704,-0.02255249,0.0038146973,-0.012260437,0.01626587,-0.0075645447,-0.061431885,-0.011199951,-0.0047340393,0.058776855,0.030181885,0.01739502,-0.001701355,0.014526367,0.053588867,0.033203125,-0.013191223,-0.029129028,0.013824463,-0.010826111,0.022994995,0.009559631,0.031204224,-0.014984131,0.025756836,0.032226562,-0.018936157,-0.016021729,0.023925781,-0.05545044,-0.04562378,-0.031799316,0.014884949,0.011390686,-0.014251709,0.012542725,-0.038208008,-0.007041931,0.007820129,0.023788452,0.0063209534,0.06329346,0.005054474,0.018753052,0.017440796,0.016540527,-0.053222656,0.03640747,0.049316406,0.015602112,-0.0015153885,-0.037506104,0.027297974,0.022491455,-0.024475098,-0.002418518,-0.0000073313713,0.013893127,0.0024414062,0.021469116,0.028579712,-0.0077667236,-0.003206253,-0.011459351,0.008422852,0.018981934,0.012863159,-0.015716553,-0.0413208,-0.08532715,0.058624268,0.053375244,0.022247314,0.007129669,0.00018048286,-0.02935791,-0.03668213,-0.058624268,0.040740967,0.05593872,-0.0115737915,-0.03869629,0.029968262,-0.01927185,-0.034088135,-0.027786255,-0.024353027,-0.021270752,-0.0140686035,-0.011146545,-0.083740234,0.0259552,0.013305664,0.031799316,0.03869629,0.0025043488,-0.060577393,-0.010070801,0.0062561035,0.011512756,-0.031051636,0.011054993,-0.017059326,0.027252197,0.023727417,-0.002216339,0.013328552,0.004676819,-0.023254395,-0.006099701,0.025253296,0.0016222,-0.008773804,0.025558472,0.015823364,-0.035095215,0.019073486,0.014404297,0.0446167,-0.042938232,0.038208008,-0.0107040405,-0.0013504028,0.0435791,-0.005809784,-0.051330566,0.026412964,0.0033302307,0.059753418,0.062683105,0.031097412,0.009689331,-0.01637268,0.064208984,-0.014602661,0.0030899048,0.016983032,0.028396606,0.03967285,-0.004940033,-0.06945801,-0.046691895,0.0013742447,-0.037597656,0.024047852,-0.024002075,0.016906738,0.0032749176,0.025405884,-0.012428284,-0.005672455,-0.04373169,-0.01260376,-0.018310547,0.019439697,-0.025817871,-0.023391724,0.014907837,0.014556885,-0.0055732727,-0.0022392273,0.042633057,0.020462036,-0.024032593,-0.002855301,-0.030044556,-0.02583313,-0.02809143,0.027267456,0.010520935,0.01574707,0.021316528,-0.018844604,0.009880066,0.026504517,-0.0061149597,0.044433594,0.008476257,-0.0044174194,-0.04916382,-0.0418396,-0.021087646,-0.03994751,0.010253906,0.022964478,-0.0045547485,0.052001953,-0.008468628,-0.009292603,-0.034606934,0.043518066,-0.036743164,0.0061149597,0.016921997,-0.042388916,-0.032928467,-0.012084961,0.0068511963,0.022613525,0.027252197,0.014427185,0.026275635,0.08465576,0.0418396,0.006259918,-0.006755829,0.0390625,0.021530151,-0.0109939575,0.00007754564,-0.028518677,-0.015106201,0.02835083,-0.030334473,-0.03265381,-0.08074951,0.062286377,0.0068893433,0.07336426,0.005897522,0.015625,0.022750854,-0.013320923,0.027145386,-0.056427002,-0.02973938,-0.034210205,-0.034179688,0.017974854,-0.011314392,0.010383606,-0.030944824,0.028930664,0.007904053,0.01727295,-0.045318604,0.05731201,-0.017837524,-0.01966858,0.033081055,0.011520386,0.046295166,0.048950195,-0.033599854,0.010185242,0.00051403046,-0.02470398,-0.009712219,0.032104492,-0.009841919,-0.02268982,-0.062561035,-0.004486084,0.011405945,-0.017547607,-0.06707764,-0.0048980713,0.0048065186,0.0152282715,0.020507812,-0.02168274,-0.0385437,0.01828003,-0.013114929,-0.077819824,0.0010175705,-0.020446777,0.022323608,0.024108887,-0.028930664,0.03186035,0.00409317,0.014846802,-0.003698349,0.03112793,-0.0073165894,-0.0003068447,-0.016281128,0.032104492,0.0077552795,0.024276733,0.01361084,0.05419922,0.02532959,0.014480591,0.04019165,0.027191162,-0.0023975372,-0.05316162,0.013496399,-0.06286621,0.017486572,0.026733398,-0.035186768,0.00680542,-0.0030059814,-0.031204224,0.00063085556,0.020065308,-0.023864746,0.012519836,0.034851074,-0.044433594,-0.034423828,-0.05065918,-0.02645874,0.007610321,0.06604004,0.0040740967,0.02142334,-0.033721924,-0.008666992,0.019638062,0.008872986,0.008636475,-0.0138168335,-0.015899658,-0.041992188,-0.006099701,-0.028274536,0.005973816,0.025314331,0.0019836426,-0.017532349,0.01486969,-0.0008401871,0.008903503,-0.009613037,0.0115356445,0.015060425,-0.036224365,0.013267517,-0.0016031265,0.030517578,-0.0035820007,-0.04345703,-0.05581665,0.031982422,0.0007581711,0.025024414,-0.03982544,0.009857178,0.0003874302,0.014640808,0.0015687943,-0.023635864,0.0003964901,0.016647339,-0.021209717,-0.09057617,0.046813965,-0.009742737,0.027648926,0.013397217,-0.007499695,0.03829956,-0.0066719055,0.01776123,0.011154175,-0.030639648,-0.00856781,-0.03302002,-0.02079773,-0.018463135,-0.0016994476,-0.0027980804,0.017410278,-0.009140015,0.02166748,-0.010810852,-0.022521973,0.03479004,0.005622864,0.003063202,0.017532349,-0.004425049,0.0042762756,0.04421997,0.019180298,-0.062683105,0.044952393,0.0012540817,0.0009326935,-0.0075950623,0.054229736,0.021057129,-0.013839722,-0.0010595322,-0.013320923,0.004146576,-0.026763916,-0.004688263,0.010231018,0.05444336,0.027801514,-0.053131104,0.020904541,0.014961243,-0.02835083,-0.0158844,0.023208618,0.024551392,-0.04937744,0.010322571,0.0042495728,0.03744507,-0.0390625,0.0019874573,0.005290985,0.031280518,0.014862061,0.015319824,-0.0010471344,0.012817383,-0.023239136,0.018585205,0.0007677078,-0.02619934,-0.029815674,-0.010391235,0.019699097,0.015838623,-0.0008034706,0.002538681,-0.015991211,-0.008491516,-0.00008571148,-0.014373779,0.034729004,0.015823364,0.016662598,-0.006778717,0.0023155212,0.034088135,-0.04147339,-0.016906738,0.0056381226,0.04269409,-0.0055999756,-0.007537842,0.036102295,0.00894928,0.035308838,-0.036132812,-0.017211914,-0.003955841,0.007736206,-0.011756897,-0.0690918,-0.021072388,-0.019744873,0.026046753,-0.017303467,-0.001408577,0.02508545,-0.0018911362,-0.00030636787,0.00674057,0.021118164,-0.012611389,0.0020503998,-0.05923462,-0.009033203,-0.010505676,-0.011878967,-0.03692627,0.015625,-0.036346436,-0.035614014,0.0007185936,-0.025802612,0.010116577,0.008308411,-0.009254456,0.037384033,-0.01448822,0.006679535,-0.00087070465,-0.023010254,-0.005634308,0.0009860992,0.027877808,-0.06088257,0.014755249,-0.016662598,-0.009963989,-0.017227173,-0.004016876,0.019424438,0.008125305,0.018432617,0.031204224,-0.051116943,0.028213501,-0.026992798,-0.009254456,-0.0059814453,-0.010597229,-0.00806427,-0.023590088,-0.017807007,0.032165527,-0.0016994476,-0.007896423,-0.016326904,-0.0418396,-0.021636963,-0.04559326,0.035247803,0.015449524,0.049194336,-0.02381897,-0.015670776,0.010124207,0.024856567,-0.0018291473,-0.020812988,-0.00050258636,0.027862549,0.02406311,0.0036354065,-0.030593872,-0.0151901245,-0.019454956,0.00074005127,-0.046966553,-0.047698975,-0.010498047,0.0236969,0.0052490234,-0.014289856,-0.02796936,-0.027114868,-0.001748085,-0.024337769,0.012214661,-0.0016317368,0.017364502,-0.0037403107,-0.00868988,0.008583069,-0.001876831,-0.0317688,0.03555298,0.011505127,-0.021820068,-0.020614624,-0.015220642,0.020614624,-0.0024528503,-0.0054473877,-0.026794434,-0.013305664,-0.017745972,-0.05670166,0.013328552,-0.003993988,0.01335907,-0.012275696,0.0007953644,-0.044311523,-0.015296936,-0.016845703,-0.010887146,0.0051345825,0.014350891,0.005809784,0.0023899078,0.00315094,-0.0059280396,-0.0033550262,-0.018371582,-0.0005283356,0.009727478,-0.00793457,0.023529053,0.04345703,-0.005809784,-0.021240234,-0.005657196,0.0007328987,0.01864624,-0.022750854,0.000019431114,0.0017223358,0.02571106,-0.012054443,-0.015487671,-0.036193848,0.0076026917,0.06173706,-0.01071167,-0.0010843277,-0.012207031,0.0023231506,0.01977539,0.036895752,-0.03918457,0.01864624,-0.03262329,0.021087646,-0.017211914,0.032348633,0.008934021,0.024383545,-0.020431519,-0.038635254,0.0107040405,0.03414917,-0.0067367554,-0.077941895,-0.014060974,-0.072631836,-0.008842468,-0.023361206,-0.021636963,0.0052375793,0.01398468,-0.031311035,-0.07104492,-0.0017576218,0.046966553,0.0065574646,0.014259338,-0.0030059814,0.0030097961,0.025878906,-0.012252808,-0.024261475,0.007911682,-0.02519226,-0.01739502,-0.018417358,0.032989502,-0.01159668,-0.021530151,0.010955811,-0.006275177,0.021316528,-0.012962341,0.011978149,-0.009765625,0.0060653687,-0.0074043274,0.00084114075,-0.009178162,-0.014808655,0.033233643,-0.053619385,0.031555176,0.00248909,0.018676758,0.00409317,0.01461792,0.023101807,-0.03967285,-0.006401062,0.0056648254,0.007091522,0.023452759,-0.021621704,0.04711914,0.008972168,0.004650116,0.0017719269,-0.027832031,0.0017671585,-0.044433594,-0.02557373,0.024429321,-0.0027942657,0.0065689087,-0.03086853,-0.010040283,0.020446777,-0.0028324127,-0.0058288574,-0.015411377,0.0028972626,-0.01802063,0.021835327,-0.012825012,0.040771484,-0.0012454987,0.022644043,0.03286743,0.045715332,0.006008148,0.0012207031,-0.0003399849,0.011039734,-0.023010254,-0.003868103,0.006526947,0.02748108,0.010025024,0.012634277,0.017089844,-0.028884888,-0.034423828,-0.0104599,-0.014144897,0.017059326,-0.023132324,0.019042969,0.0033454895,0.011230469,-0.0209198,-0.024124146,-0.0011968613,-0.019210815,-0.01159668,-0.015205383,0.004047394,0.016616821,0.021087646,-0.0060043335,0.0016994476,-0.012634277,0.03427124,-0.00459671,-0.016159058,0.011116028,0.050201416,-0.0003786087,-0.029159546,0.005657196,-0.008453369,-0.0071640015,0.008125305,0.0026340485,0.027709961,0.024108887,-0.0075187683,0.027252197,-0.0063323975,0.053527832,-0.0065574646,0.011123657,0.01008606,0.009635925,0.014884949,0.038146973,-0.04421997,0.025131226,0.014923096,-0.019546509,-0.0013227463,-0.012329102,-0.012702942,0.008621216,0.007270813,-0.014465332,0.029190063,0.01109314,0.014221191,-0.036987305,-0.016906738,0.002538681,-0.04067993,-0.027374268,-0.005001068,-0.01448822,-0.007232666,0.011764526,-0.018585205,0.004009247,-0.028961182,0.021591187,0.0025749207,0.013175964,-0.014907837,-0.028137207,-0.0016803741,-0.009605408,-0.015472412,0.004573822,-0.0034923553,0.052459717,0.031585693,0.02142334,0.024902344,0.031051636,0.011695862,-0.04663086,-0.016494751,0.012611389,-0.00844574,0.019546509,-0.03564453,0.04763794,0.0625,0.0020885468,0.028198242,0.044433594,0.038146973,-0.0016727448,0.01651001,0.0017328262,0.020706177,-0.015716553,0.022583008,-0.004787445,0.029968262,-0.016357422,0.020553589,-0.009498596,0.03125,-0.019439697,0.016281128,0.072265625,0.016952515,-0.0076408386,0.021621704,-0.019760132,-0.012809753,-0.0059165955,-0.022979736,0.049835205,0.006504059,0.040618896,0.033325195,0.0044822693,-0.016204834,0.02999878,-0.0032253265,-0.030517578,0.055114746,0.0015287399,-0.015991211,-0.0068359375,-0.008491516,0.016113281,-0.052825928,-0.016784668,0.02760315,-0.01689148,0.012901306,-0.009635925,0.00012421608,-0.00004631281,0.006641388,-0.0034503937,0.025558472,-0.01928711,0.011642456,0.010368347,0.010177612,0.016433716,0.0102005005,0.034179688,-0.026031494,-0.020828247,0.006401062,0.0184021,0.016937256,-0.013404846,0.029571533,0.021911621,0.040130615,0.029006958,-0.011009216,0.0019874573,0.031402588,0.004142761,-0.004421234,0.050811768,0.012458801,0.02911377,0.037963867,0.036895752,0.0317688,-0.01979065,0.01991272,-0.00137043,0.0035057068,-0.0104904175,0.004650116,0.01335907,-0.009231567,0.025268555,-0.0033683777,-0.0021629333,0.02178955,0.032714844,-0.020706177,0.000089645386,0.0017795563,0.009727478,-0.003921509,-0.0020694733,0.01348114,-0.020645142,0.006855011,0.021850586,0.01991272,-0.038146973,0.018157959,0.0033454895,-0.02381897,-0.012214661,0.015281677,-0.043884277,0.009727478,0.0031471252,-0.012580872,-0.029083252,0.017807007,0.002664566,-0.0044403076,0.023864746,0.010314941,0.0046195984,0.0034694672,0.023544312,0.035705566,0.008659363,0.0056533813,-0.00029921532,0.0059547424,0.03567505,-0.01537323,-0.013168335,-0.03656006,0.002073288,0.021469116,-0.02041626,-0.022506714,0.005908966,-0.008850098,-0.01309967,-0.0017442703,0.036956787,0.011245728,0.037078857,-0.018325806,-0.006374359,0.0058631897,0.033081055,0.009262085,-0.02217102,-0.017150879,0.01576233,-0.02218628,0.042144775,0.047058105,-0.004135132,0.007511139,0.00459671,-0.020050049,-0.0105896,-0.03137207,0.020828247,-0.028289795,0.009124756,0.007949829,0.023361206,-0.03427124,-0.018615723,-0.0041885376,-0.028244019,-0.027297974,-0.02368164,0.0051193237,0.010528564,0.02911377,0.0073928833,0.039916992,-0.008644104,0.05883789,-0.015640259,0.058929443,0.0031223297,-0.008796692,0.03994751,0.019165039,0.028137207,0.010696411,0.019073486,-0.025405884,0.002855301,0.017486572,0.008148193,0.014274597,0.0087509155,-0.011711121,0.045318604,-0.02973938,0.02999878,-0.0000060796738,-0.004184723,0.017059326,-0.01965332,-0.026260376,0.0031604767,-0.005962372,0.007537842,0.045196533,-0.009117126,-0.01096344,-0.021255493,-0.017501831,0.01826477,-0.015899658,0.0039634705,-0.0051841736,-0.004711151,0.016738892,-0.024658203,-0.008842468,0.010169983,0.01953125,-0.040100098,-0.00844574,0.007080078,0.024459839,-0.029663086,0.0362854,0.032562256,0.003358841,-0.009613037,0.05215454,-0.007320404,0.020843506,0.0054512024,0.05178833,0.043395996,0.006084442,-0.008682251,0.022949219,0.027572632,-0.011398315,0.017684937,0.04269409,0.0038490295,0.016647339,0.00045633316,-0.011062622,0.0077171326,-0.0064735413,-0.020446777,-0.008361816,-0.024169922,-0.01197052,0.0030174255,0.009475708,-0.003616333,0.01159668,-0.010688782,-0.016403198,0.005252838,0.03704834,0.014060974,-0.046203613,0.001876831,0.010307312,0.012290955,-0.015838623,-0.021331787,0.0046157837,-0.050476074,-0.0072402954,0.027801514,-0.001876831,-0.0062332153,-0.026000977,0.00041508675,0.055755615,0.011650085,0.008995056,0.013748169,-0.0158844,0.023773193,-0.010848999,0.006664276,0.00095272064,-0.022399902,-0.0022525787,0.029205322,0.004863739,-0.013328552,0.008239746,0.018066406,0.018234253,-0.0005912781,0.014175415,0.021469116,-0.010681152,-0.0035362244,0.006023407,0.013587952,-0.032714844,-0.042785645,-0.012359619,0.027832031,0.047698975,-0.017837524,-0.0099105835,-0.021057129,0.042144775,0.03173828,0.04135132,0.008773804,0.05480957,0.013343811,-0.004322052,-0.022338867,0.020614624,0.0018033981,-0.018798828,0.01146698,-0.03152466,0.0005607605,-0.0026054382,0.025726318,0.009597778,-0.019302368,-0.012771606,-0.020080566,-0.008178711,0.0209198,-0.027374268,0.014923096,-0.034606934,-0.011695862,0.013435364,0.008850098,-0.018341064,-0.03427124,-0.019073486,-0.013496399,-0.07183838,0.0044555664,-0.016357422,-0.0119018555,-0.03048706,0.008552551,-0.008010864,0.021697998,0.0018320084,-0.007347107,0.013519287,0.021621704,0.017028809,-0.0028800964,0.027374268,-0.02532959,-0.020309448,0.0023040771,-0.008308411,-0.0039749146,0.0368042,-0.028625488,0.03665161,0.007320404,0.00015926361,0.004020691,-0.009864807,-0.012924194,0.007835388,-0.04260254,-0.018798828,0.0113220215,0.013633728,0.0011816025,-0.0022010803,0.041931152,-0.021133423,-0.019073486,0.031341553,0.04928589,0.0022583008,0.05847168,-0.02696228,0.007320404,-0.037994385,-0.00031757355,-0.005569458,0.01361084,0.008476257,0.013916016,0.0062561035,0.0234375,0.014289856,-0.0178833,-0.01486969,0.038757324,0.027175903,-0.009407043,0.03552246,0.01675415,0.003545761,-0.027557373,-0.0037975311,0.004005432,0.04272461,0.008399963,0.018447876,-0.023330688,0.0070991516,-0.014389038,0.012176514,0.03515625,-0.026611328,-0.037994385,-0.00969696,-0.021774292,0.021774292,-0.00605011,0.009254456,-0.008834839,0.011116028,-0.02798462,-0.029129028,-0.02532959,0.021835327,0.0059280396,-0.010925293,0.0057678223,-0.005317688,-0.0045318604,-0.031951904,-0.0029468536,-0.056732178,-0.01977539,-0.002380371,-0.012817383,0.016220093,0.0070114136,-0.008995056,0.0043907166,0.008766174,0.0016460419,0.00894928,0.015052795,-0.0008301735,-0.0060043335,0.023803711,0.026870728,-0.0034828186,-0.007762909,-0.012298584,-0.0011034012,0.03137207,-0.003534317,0.009605408,-0.009986877,0.015266418,0.008506775,-0.00042700768,0.02633667,-0.012451172,0.031280518,-0.038238525,-0.013015747,-0.003030777,-0.017608643,0.03186035,-0.014633179,-0.036224365,-0.014297485,-0.00036621094,-0.028366089,0.011276245,0.015296936,0.0385437,-0.006767273,0.042022705,-0.025405884,-0.02607727,0.0043029785,-0.000852108,-0.017700195,-0.0067481995,0.022476196,0.00032925606,0.031204224,0.0039100647,0.0012741089,-0.02645874,-0.012893677,-0.0047073364,-0.009887695,-0.008293152,0.00024485588,0.02015686,0.02961731,0.014060974,0.009941101,0.027862549,0.0073661804,0.033813477,0.011253357,0.044555664,0.02658081,-0.02508545,0.013931274,0.013687134,-0.013473511,0.004901886,-0.009689331,0.010269165,-0.030181885,0.0004503727,-0.010353088,0.030303955,-0.010421753,0.011688232,-0.0102005005,-0.009147644,-0.05657959,-0.0036315918,-0.05407715,0.00497818,0.022232056,0.007297516,0.0140686035,0.010261536,-0.0234375,0.0031394958,0.020767212,-0.0077285767,-0.03378296,-0.014579773,0.0007624626,0.0059013367,0.008911133,0.02079773,-0.034851074,-0.033325195,0.00043535233,0.004058838,-0.0072898865,-0.0287323,0.025146484,0.0284729,-0.019470215,-0.02357483,0.01927185,0.010536194,0.004207611,0.012062073,0.0067481995,0.029891968,0.03970337,-0.000024974346,0.017822266,0.010673523,-0.037628174,0.05142212,-0.0116119385,0.028366089,-0.020843506,-0.018554688,-0.03149414,-0.0075950623,-0.0031852722,-0.004558563],"createdAt":"2026-04-18T18:39:25.134Z","updatedAt":"2026-04-28T10:05:13.316Z","lastSeenAt":"2026-04-28T10:05:13.316Z","tsv":"'/api/v1/accounts/24/balance':46 '/request':86,138 '0.02':74,85,137 '000':69 '20':68 '402':233 'Base network API' 'USDC micropayment API' 'accept':224 'account':4,18,35,171 'account balance API' 'account-balance' 'across':88 'advertis':83 'ai/ml':108 'analysi':111 'analyt':107 'api':91,104,143,184 'appear':168 'balanc':5,19,36,172,215 'base':8,22,58,70,164 'behind':49 'broader':98 'call':12,26 'challeng':62,234 'classif':113 'commit':151 'confirm':228 'connect':193 'consist':78 'contain':217 'content':199 'convers':130 'cost':66 'crypto payment API' 'data':106 'descript':210 'difficult':242 'doc':183 'document':178,239 'embed':114 'endpoint':6,20,30,92,133,167,226 'entir':156 'estim':124 'exampl':207 'exchang':119 'experiment':246 'extrem':180 'feed':118 'field':213 'financ':115 'flat':84 'format':176 'gas':123 'gate':3,17,48,103 'generat':131 'geocod':128 'handl':155 'host':96 'howev':177 'indic':63 'infer':109 'inform':173 'infrastructur':126 'json':175 'json-response' 'key':144 'lack':237 'limit':147 'live':229 'lookup':37 'lowpaymentfee' 'lowpaymentfee.com':32,95 'make':240 'maximum':65 'minimum':150 'model':140 'network':59 'no-api-key' 'openapi':203 'page':188 'paramet':220 'particular':166 'pay':10,24 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request' 'payment':41,55,153 'per':11,25,52,76 'per-request':51 'post':222 'price':87,117,139,185 'prompt':195 'proper':232 'protocol':42,160 'provid':33,81,94 'quot':122 'rate':120,146 'readm':187 'render':190 'request':53,77,223 'request/response':206 'requir':152 'resourc':45 'respons':216 'return':170,230 'schema':204 'sentiment':110 'share':134 'span':105 'spars':181 'specif':44 'substant':198 'suit':99 'summar':112 'token':121 'unit':71 'usd':75 'usdc':14,28,54,73,162 'usdc-on-base' 'use':161,244 'util':127 'valid':129 'via':38,157 'wallet':194 'web3':116 'without':245 'x402':2,16,40,61,102,159 'x402 API' 'x402-gated':1,15,101 'x402-payment'","prices":[{"id":"12d9014d-4e60-46f9-89ed-594502fb9c53","listingId":"d47629cc-5302-4556-80e9-5b1d11c90ba0","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/24/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":"2026-04-18T18:39:25.134Z"}],"sources":[{"listingId":"d47629cc-5302-4556-80e9-5b1d11c90ba0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/24/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:25.134Z","lastSeenAt":"2026-04-28T10:05:13.316Z"}],"details":{"listingId":"d47629cc-5302-4556-80e9-5b1d11c90ba0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/24/balance \\\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 x402 challenge requires a maximum of 20,000 base units of USDC ($0.02) per request on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/24/balance"},{"claim":"The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/24/balance"},{"claim":"Documentation, API, pricing, and README pages all show only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating pay-as-you-go balance lookups into agent workflows","Accessing financial account information without API key registration"],"bestFor":["Agents or services that need on-demand account balance checks without subscription commitments","Developers exploring x402 protocol integrations on Base","Use cases requiring keyless, pay-per-call API access"],"notFor":["Production systems requiring well-documented, schema-validated APIs","High-volume balance polling where per-request fees would accumulate significantly","Users who need detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.985Z"},"updatedAt":"2026-04-28T10:05:13.316Z"}}