{"id":"2f0aa3ac-bff6-4f66-9b57-326ae986b1cc","shortId":"NthnBA","kind":"x402","title":"x402-gated account balance endpoint on Base, paid per-call in USDC.","tagline":"x402-gated account balance endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/52/balance` is accessed via HTTP POST and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 0.02 USDC per request (20,000 base units at 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nHowever, the specific endpoint being listed here (`/api/v1/accounts/52/balance`) does not appear in the platform's public API catalog. It may be an internal or account-specific resource. Documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no substantive content, so the exact request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","json-api","per-call-pricing","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 balance check","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto-gated endpoint"],"warnings":["The endpoint /api/v1/accounts/52/balance is not listed in the platform's public API catalog — it may be account-specific or internal.","All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content.","No request body schema or response schema is available; integration requires trial-and-error or contacting the provider.","The platform lists many API categories (AI, finance, analytics, etc.) but provides no evidence of actual functionality behind them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/52/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/52/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific endpoint path does not appear in the platform's own catalog. Docs pages are empty beyond a wallet-connect prompt.","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":"2026-04-19T00:32:20.010Z","embedding":[-0.0046920776,0.004055023,0.0519104,0.014930725,0.014205933,-0.038330078,-0.019836426,0.014884949,0.08337402,-0.078186035,0.039855957,-0.056152344,-0.032440186,-0.024291992,-0.007774353,0.018173218,-0.026504517,0.022537231,-0.070129395,0.036315918,0.0028629303,-0.017547607,-0.0048713684,0.04345703,-0.013153076,-0.03463745,-0.0029144287,-0.039611816,-0.025680542,-0.03857422,0.04510498,-0.025253296,0.006576538,0.022750854,0.0076026917,-0.003232956,0.0017566681,0.025283813,0.03945923,-0.018966675,-0.026489258,-0.038024902,-0.0042266846,0.021026611,-0.025741577,0.011657715,0.015045166,-0.021881104,0.004295349,-0.013374329,-0.048919678,0.004459381,0.012809753,0.008232117,0.021270752,0.036102295,-0.0039253235,-0.02079773,0.027542114,0.03161621,-0.0026454926,-0.053833008,-0.0038032532,0.0050697327,0.0063934326,0.058746338,-0.0023593903,0.046081543,-0.0030403137,0.039764404,0.021499634,0.07702637,0.0340271,0.0036373138,0.007499695,-0.0127334595,0.026184082,0.041229248,-0.028305054,-0.04937744,-0.0009937286,-0.022109985,-0.07385254,-0.004020691,0.0038166046,-0.045806885,-0.008033752,0.0065460205,-0.021484375,0.053375244,-0.0881958,-0.023590088,0.014572144,0.024871826,0.01977539,-0.039886475,-0.0020637512,0.017425537,-0.005935669,0.0023651123,0.011878967,-0.008132935,0.03451538,-0.008506775,0.051727295,0.04144287,0.018218994,0.018127441,0.0054473877,0.005332947,-0.028686523,-0.008979797,-0.007801056,-0.038909912,0.00055265427,0.01966858,-0.03274536,0.013267517,-0.02507019,0.013214111,-0.035095215,0.07476807,0.026046753,-0.003730774,0.016113281,-0.046936035,-0.025756836,0.019088745,-0.027923584,-0.0021247864,0.023620605,0.00027751923,0.014846802,-0.023635864,-0.043151855,0.007671356,-0.0034675598,-0.025161743,-0.039642334,-0.014419556,0.037078857,-0.0152282715,0.022415161,-0.00021886826,-0.10571289,0.009605408,-0.030578613,0.00349617,-0.033081055,-0.006679535,0.0038604736,0.006095886,-0.010772705,-0.015174866,-0.021484375,-0.021255493,-0.0004799366,0.019256592,0.0115356445,0.06665039,0.0042686462,0.030426025,0.04345703,0.0064353943,0.029174805,0.037872314,-0.02017212,-0.07385254,-0.08300781,-0.018341064,-0.0024337769,-0.018829346,-0.037078857,0.0009627342,-0.02355957,-0.072753906,-0.014137268,-0.012413025,-0.033172607,-0.0053710938,-0.009773254,-0.022155762,0.0099487305,-0.014076233,-0.05126953,-0.0056381226,-0.0025463104,0.06591797,0.02722168,0.022216797,0.01449585,0.0060577393,0.04260254,0.041229248,-0.018371582,-0.017807007,0.0017881393,-0.006980896,0.015472412,0.006549835,0.020645142,-0.03378296,0.046081543,0.045837402,-0.017074585,-0.012771606,0.018371582,-0.05404663,-0.0317688,-0.016357422,0.009056091,0.0087890625,-0.015060425,0.0118255615,-0.034088135,-0.0030021667,0.004638672,0.026168823,-0.0040359497,0.0736084,0.00006878376,0.006652832,0.018295288,0.024017334,-0.060028076,0.02116394,0.05404663,0.021347046,-0.021362305,-0.023376465,0.024124146,0.02746582,-0.015853882,0.0062828064,-0.0017766953,0.020233154,-0.00818634,0.015151978,0.04373169,-0.012229919,-0.020050049,-0.011871338,-0.004310608,0.017730713,0.0076141357,-0.009346008,-0.031982422,-0.09063721,0.049987793,0.05697632,0.009651184,0.0019569397,0.0038776398,-0.029556274,-0.02822876,-0.06137085,0.036254883,0.061462402,-0.0068511963,-0.041259766,0.03201294,-0.010643005,-0.017730713,-0.022369385,-0.008377075,-0.021881104,-0.012786865,-0.010383606,-0.079589844,0.034851074,0.009269714,0.03555298,0.046813965,-0.003036499,-0.04449463,-0.008605957,0.009643555,0.0017757416,-0.021408081,0.00096940994,-0.023727417,0.013305664,0.025787354,0.0001693964,0.018066406,-0.0050239563,-0.012458801,0.0048294067,0.012504578,0.0045814514,-0.01751709,0.029067993,0.014778137,-0.043640137,0.022384644,0.012107849,0.05014038,-0.02986145,0.03451538,-0.021957397,0.008430481,0.050598145,-0.02330017,-0.036102295,0.023468018,0.0032024384,0.049804688,0.04949951,0.018371582,-0.0052108765,-0.00491333,0.053527832,-0.004951477,-0.0062789917,0.012886047,0.029769897,0.02796936,-0.015304565,-0.06964111,-0.034851074,-0.0011968613,-0.043060303,0.011802673,-0.024993896,0.012054443,0.005569458,0.025482178,-0.015640259,-0.006290436,-0.034362793,0.016540527,-0.012817383,0.027359009,-0.020736694,-0.009857178,0.023498535,0.026168823,-0.00075149536,-0.025985718,0.03152466,0.032592773,-0.03552246,-0.011367798,-0.024810791,-0.02130127,-0.027023315,0.023712158,-0.0008158684,0.012016296,0.0087509155,-0.022232056,-0.00093984604,0.016098022,-0.008872986,0.046447754,-0.004135132,0.0066337585,-0.058044434,-0.040802002,-0.01574707,-0.03894043,0.0036849976,0.024597168,-0.005470276,0.05706787,-0.009376526,-0.021316528,-0.019851685,0.046142578,-0.036132812,0.022598267,0.030456543,-0.024917603,-0.02268982,-0.011619568,0.0068206787,0.020965576,0.038970947,-0.0011110306,0.015670776,0.084350586,0.04586792,0.007160187,-0.0023422241,0.037231445,0.03060913,-0.011222839,0.0069732666,-0.038146973,-0.007282257,0.024612427,-0.0181427,-0.023406982,-0.086120605,0.050476074,0.011604309,0.082092285,0.012588501,-0.00015294552,0.022354126,-0.021118164,0.031341553,-0.048553467,-0.031204224,-0.039398193,-0.035858154,0.015151978,-0.006023407,0.023468018,-0.03060913,0.030258179,0.021713257,0.017745972,-0.025421143,0.054718018,-0.0104599,-0.014434814,0.028457642,0.016143799,0.023025513,0.04522705,-0.0289917,0.015945435,0.010612488,-0.03869629,-0.019577026,0.030654907,-0.0057411194,-0.033172607,-0.06335449,-0.004501343,0.019607544,-0.027862549,-0.080566406,-0.001502037,0.00919342,0.02848816,0.01927185,-0.023498535,-0.016326904,-0.008476257,-0.004135132,-0.08074951,-0.009536743,-0.020767212,0.01424408,0.024765015,-0.024673462,0.022827148,0.01222229,0.009918213,-0.00983429,0.018707275,0.0026550293,-0.008468628,-0.014945984,0.039276123,0.014717102,0.02444458,0.007106781,0.046905518,0.027297974,0.025619507,0.0390625,0.02267456,-0.0008878708,-0.05218506,0.010322571,-0.07373047,0.011703491,0.022659302,-0.0362854,0.0077285767,-0.0013380051,-0.031433105,-0.0021877289,0.0029754639,-0.03289795,0.0126953125,0.024246216,-0.03616333,-0.032592773,-0.05041504,-0.018539429,0.009918213,0.07067871,0.014175415,0.01979065,-0.038757324,-0.012016296,0.023330688,0.009162903,0.010498047,-0.013961792,-0.015777588,-0.039489746,-0.006641388,-0.03488159,-0.0006041527,0.022201538,0.0040512085,-0.0107040405,0.009361267,-0.006565094,0.015174866,-0.009918213,0.009140015,0.012077332,-0.03741455,0.014907837,0.009475708,0.03366089,-0.015213013,-0.028945923,-0.05429077,0.03842163,0.0028705597,0.025146484,-0.03277588,0.0016489029,0.004421234,0.017654419,0.004787445,-0.025314331,-0.014289856,0.011024475,-0.021514893,-0.07885742,0.036010742,-0.025360107,0.025436401,0.00440979,-0.007785797,0.031280518,0.0010356903,0.025634766,0.025054932,-0.026901245,-0.0054016113,-0.029541016,-0.023162842,-0.022033691,0.005279541,-0.0017213821,0.016937256,-0.020523071,0.028656006,-0.0076026917,-0.017868042,0.02935791,-0.0029239655,0.0054359436,0.024337769,-0.0021400452,-0.0005707741,0.04446411,0.030075073,-0.051513672,0.037841797,0.004119873,-0.0015878677,-0.012626648,0.05029297,0.013061523,-0.018234253,0.009613037,-0.015113831,0.0063476562,-0.022720337,-0.008026123,0.0067481995,0.040802002,0.009399414,-0.03805542,0.009979248,0.023468018,-0.026504517,-0.014076233,0.03149414,0.019973755,-0.051605225,0.015396118,0.020370483,0.024414062,-0.038330078,0.007587433,-0.0020370483,0.034454346,0.01637268,0.011306763,0.006576538,0.01146698,-0.030349731,0.011817932,0.012229919,-0.020233154,-0.021759033,-0.005264282,0.033294678,0.016342163,0.008590698,-0.0029678345,-0.01977539,-0.0054740906,0.010108948,-0.011192322,0.02482605,0.011528015,0.014091492,-0.009315491,0.0033340454,0.029251099,-0.034362793,0.0004825592,0.010665894,0.036834717,0.00038170815,-0.017608643,0.02909851,0.002117157,0.037017822,-0.040802002,-0.021240234,-0.00894928,0.014770508,-0.015380859,-0.0519104,-0.017547607,-0.013282776,0.025634766,-0.014228821,0.00655365,0.033416748,-0.0015382767,-0.007659912,0.004650116,0.01663208,-0.012397766,0.0071029663,-0.05908203,-0.0064468384,-0.021697998,-0.015213013,-0.04309082,0.020477295,-0.037017822,-0.024383545,-0.002954483,-0.01876831,0.007633209,0.0037555695,-0.011329651,0.033233643,-0.0046081543,0.014701843,-0.0050811768,-0.02166748,-0.00043463707,-0.0061569214,0.025863647,-0.0602417,0.016586304,-0.013946533,0.0029678345,-0.011192322,0.0023269653,0.02319336,0.014724731,0.020858765,0.04135132,-0.055023193,0.02961731,-0.03253174,0.006313324,-0.009384155,-0.013458252,0.0011768341,-0.025146484,-0.020751953,0.040161133,-0.0041007996,-0.012863159,-0.022415161,-0.023010254,-0.015327454,-0.047088623,0.03050232,0.0124053955,0.055877686,-0.027816772,-0.0007791519,0.024459839,0.021621704,-0.0025367737,-0.024841309,-0.0010681152,0.010627747,0.012275696,0.0022144318,-0.03363037,-0.029403687,-0.015625,-0.0039711,-0.04623413,-0.045684814,-0.00598526,0.025436401,0.010406494,-0.022720337,-0.02180481,-0.02293396,-0.0012598038,-0.02293396,0.009712219,-0.014167786,0.025817871,-0.0033836365,-0.014640808,0.017425537,-0.0024280548,-0.026382446,0.03945923,0.019683838,-0.007293701,-0.015319824,-0.0009803772,0.0077171326,-0.002500534,0.0021209717,-0.025985718,-0.025802612,-0.014831543,-0.061065674,0.014205933,-0.00077962875,0.012763977,-0.007835388,-0.016220093,-0.044006348,-0.014907837,-0.019821167,-0.0053520203,0.0126571655,0.01373291,0.0043945312,0.0068855286,0.0025596619,-0.01939392,-0.012573242,-0.015525818,0.011444092,0.009757996,-0.0019159317,0.0077667236,0.038635254,0.003156662,-0.018966675,-0.0013971329,0.0042037964,0.019515991,-0.019256592,0.006652832,0.0070114136,0.024917603,-0.010940552,-0.022033691,-0.045928955,-0.005455017,0.06390381,-0.013214111,-0.014846802,-0.013999939,0.0087890625,0.021331787,0.039855957,-0.034088135,0.011802673,-0.034851074,0.017501831,-0.021560669,0.03213501,0.001332283,0.031173706,-0.018447876,-0.039489746,0.0025234222,0.04534912,-0.021591187,-0.068359375,-0.011398315,-0.06213379,-0.0070381165,-0.021728516,-0.027175903,0.014167786,0.0055351257,-0.023468018,-0.061279297,0.012176514,0.041534424,0.009483337,0.0340271,-0.0039100647,0.011642456,0.030014038,-0.018661499,-0.023910522,0.014663696,-0.028686523,-0.005695343,-0.015731812,0.018447876,-0.015686035,-0.027511597,0.024154663,0.002243042,0.026489258,-0.014930725,0.015289307,-0.011856079,-0.002046585,-0.009162903,0.008361816,-0.0055885315,-0.002796173,0.04525757,-0.045043945,0.03125,0.0035152435,0.018539429,0.011047363,0.014411926,0.03048706,-0.04336548,0.0019721985,0.015533447,0.0046653748,0.031341553,-0.028686523,0.045898438,0.022964478,-0.0053596497,0.019165039,-0.020187378,0.006603241,-0.042297363,-0.016296387,0.03564453,-0.013572693,0.016143799,-0.029129028,-0.001865387,0.010971069,-0.010391235,-0.01096344,-0.012809753,-0.00381279,-0.018203735,0.021743774,-0.0104904175,0.037200928,0.00011193752,0.022201538,0.027389526,0.041656494,0.008995056,0.0013160706,0.0034770966,0.019577026,-0.022781372,-0.009307861,0.009773254,0.023010254,0.0037269592,0.015914917,0.017318726,-0.033996582,-0.03289795,-0.005718231,-0.025604248,0.008216858,-0.025405884,0.014328003,-0.0020637512,0.017333984,-0.020202637,-0.036499023,-0.0007596016,-0.014266968,-0.009422302,-0.0072364807,0.011383057,0.013374329,0.004917145,0.0007209778,0.00422287,-0.005809784,0.03652954,-0.003458023,-0.0048599243,0.017501831,0.052978516,0.005569458,-0.022857666,-0.013114929,-0.0023937225,-0.0034713745,0.0022621155,-0.005630493,0.019378662,0.030792236,-0.009315491,0.021392822,-0.005722046,0.05078125,-0.0031032562,0.017425537,-0.003129959,0.010147095,0.009750366,0.041046143,-0.032348633,0.008590698,0.007247925,-0.017181396,-0.003255844,-0.017410278,-0.028686523,-0.0038318634,0.00049066544,-0.015205383,0.031829834,0.024871826,0.021636963,-0.037078857,-0.004573822,0.008743286,-0.040618896,-0.019683838,0.009742737,-0.009666443,-0.011383057,0.014961243,-0.025024414,0.0058288574,-0.020568848,0.018325806,-0.004421234,0.013549805,-0.013999939,-0.02973938,-0.016403198,-0.011619568,-0.020553589,0.0071525574,-0.0010471344,0.04623413,0.021881104,0.02822876,0.034484863,0.0287323,0.009109497,-0.048065186,-0.014343262,0.020217896,-0.00223732,0.0151901245,-0.032592773,0.036376953,0.061767578,0.00033688545,0.021621704,0.05026245,0.030792236,-0.0062332153,0.01184845,-0.011070251,0.019058228,-0.016540527,0.015899658,-0.00283432,0.029067993,-0.013755798,0.012397766,-0.004043579,0.033233643,-0.033843994,0.021408081,0.07702637,0.023910522,-0.0028209686,0.016067505,-0.012214661,-0.01574707,-0.015563965,-0.031051636,0.05783081,0.0046653748,0.0418396,0.037200928,0.0062713623,-0.021148682,0.023956299,-0.01109314,-0.034057617,0.061431885,0.005554199,-0.00844574,-0.007736206,-0.017410278,0.011413574,-0.05908203,-0.029403687,0.026947021,-0.013969421,0.015151978,-0.0055007935,0.008384705,0.004634857,0.014587402,-0.004776001,0.02609253,-0.017410278,-0.0024147034,0.02017212,0.0053100586,0.0064811707,0.0014972687,0.042022705,-0.018600464,-0.018508911,-0.00021290779,0.020233154,0.01360321,-0.0063591003,0.03161621,0.014572144,0.039093018,0.037109375,-0.023086548,0.011985779,0.040374756,0.003458023,-0.010902405,0.04800415,0.01965332,0.029373169,0.03805542,0.041107178,0.031204224,-0.014717102,0.023254395,0.0029907227,-0.0044136047,-0.0129470825,0.0038928986,0.0050964355,-0.012588501,0.02861023,0.0022773743,-0.000916481,0.01574707,0.03945923,-0.015075684,0.0011367798,0.0072288513,0.0010356903,0.0020008087,-0.0026416779,0.018539429,-0.026824951,0.0025863647,0.028015137,0.024353027,-0.039031982,0.011497498,0.0045661926,-0.029891968,-0.015838623,0.019088745,-0.042053223,0.010498047,-0.0015068054,-0.016021729,-0.032806396,0.027511597,0.0029582977,-0.007633209,0.040222168,0.012245178,0.00017666817,0.008628845,0.0104599,0.015365601,0.003791809,-0.0031604767,-0.006122589,0.016616821,0.032043457,-0.013397217,0.0024032593,-0.02935791,-0.0051231384,0.027297974,-0.008621216,-0.025299072,0.0006723404,-0.0058555603,-0.013755798,-0.00579834,0.030197144,0.010040283,0.03753662,-0.010421753,-0.014602661,0.0055236816,0.037231445,0.019805908,-0.018936157,-0.024368286,0.015548706,-0.01424408,0.036376953,0.058807373,-0.009819031,0.010383606,-0.0039253235,-0.012191772,-0.005870819,-0.015563965,0.023071289,-0.028640747,0.018051147,0.01210022,0.015022278,-0.03225708,-0.018844604,0.0037212372,-0.023925781,-0.017532349,-0.020523071,-0.0007581711,-0.002035141,0.031829834,0.015083313,0.031097412,-0.010871887,0.060760498,-0.012489319,0.061157227,0.0065956116,-0.012039185,0.04031372,0.029052734,0.020690918,0.0070762634,0.026428223,-0.023147583,-0.0034713745,0.03164673,0.004585266,0.014831543,0.006248474,-0.011039734,0.041046143,-0.026824951,0.031585693,-0.015975952,-0.0026664734,0.014533997,-0.016448975,-0.02003479,0.0043754578,-0.0035247803,0.008865356,0.040924072,-0.011184692,-0.011260986,-0.010002136,-0.018127441,0.02986145,-0.015525818,0.004890442,0.0016508102,-0.016647339,0.018310547,-0.020690918,-0.015007019,0.005012512,0.02633667,-0.032409668,-0.014129639,0.00005608797,0.025009155,-0.019195557,0.031982422,0.037231445,0.004020691,0.0034008026,0.048217773,-0.0050811768,0.024810791,0.00088071823,0.051940918,0.03933716,0.010749817,-0.010383606,0.021438599,0.024276733,-0.009124756,0.0146484375,0.054260254,0.0021400452,0.020889282,-0.008041382,-0.0072288513,0.0013990402,-0.007255554,-0.008728027,-0.008888245,-0.017974854,-0.016616821,-0.01499939,0.004951477,-0.009147644,0.0135650635,-0.0063209534,-0.016021729,0.010139465,0.0340271,0.022827148,-0.05307007,-0.008155823,0.015586853,0.016204834,-0.02078247,-0.022766113,-0.0009174347,-0.04071045,0.0076408386,0.024749756,0.0035381317,0.0020809174,-0.025909424,0.0041885376,0.05569458,0.011375427,0.009712219,0.01486969,-0.025985718,0.023086548,-0.0035705566,-0.0005326271,-0.007965088,-0.010169983,0.0036888123,0.027709961,-0.0085372925,-0.01260376,0.0129470825,0.008872986,0.015563965,0.011222839,0.010620117,0.016464233,-0.014923096,-0.0069465637,0.0146102905,0.014854431,-0.030807495,-0.045410156,-0.013626099,0.014472961,0.05227661,-0.01600647,-0.01374054,-0.014816284,0.029632568,0.03604126,0.046051025,0.0034332275,0.047332764,0.008956909,-0.0036792755,-0.019683838,0.020050049,0.002412796,-0.018035889,0.015548706,-0.017288208,-0.013908386,0.0004813671,0.015914917,0.006164551,-0.007434845,-0.0126953125,-0.020980835,-0.010444641,0.019042969,-0.03274536,0.018310547,-0.03479004,-0.013397217,0.0110321045,-0.0035190582,-0.023651123,-0.033996582,-0.014320374,0.005004883,-0.072631836,0.009033203,-0.024749756,-0.016937256,-0.024307251,0.009353638,-0.016448975,0.025512695,0.0031089783,-0.0019369125,0.00085258484,0.025512695,-0.00052690506,0.0051116943,0.026977539,-0.021362305,-0.017227173,-0.007255554,-0.008529663,-0.00026202202,0.018447876,-0.029785156,0.03677368,0.012046814,-0.0035381317,0.00075244904,-0.010536194,-0.023040771,0.008666992,-0.04296875,-0.019989014,0.010185242,0.018692017,-0.0028362274,0.0035572052,0.05670166,-0.016815186,-0.021972656,0.030410767,0.053955078,-0.0034446716,0.061279297,-0.03265381,0.0010051727,-0.032043457,-0.006954193,-0.0062065125,0.012016296,0.012489319,0.017593384,0.012527466,0.020950317,0.018539429,-0.020202637,-0.019195557,0.024032593,0.021591187,-0.011138916,0.04534912,0.009475708,0.0008454323,-0.022827148,-0.016662598,0.004245758,0.047698975,0.026641846,0.01625061,-0.021392822,0.0009756088,-0.013473511,0.011741638,0.02796936,-0.03543091,-0.04248047,-0.007537842,-0.013114929,0.012435913,-0.0029029846,0.019897461,-0.008926392,0.015365601,-0.034606934,-0.027633667,-0.031921387,0.017303467,0.010040283,-0.0047912598,-0.00630188,0.006717682,0.0045433044,-0.029052734,-0.0050697327,-0.052703857,-0.012565613,0.009544373,-0.013702393,0.0124435425,0.0048675537,0.0036525726,0.013755798,0.002286911,-0.0033435822,0.003211975,0.019927979,-0.015945435,0.0021572113,0.029220581,0.0025253296,-0.009246826,-0.0022029877,-0.0030517578,-0.0009622574,0.04031372,0.003353119,0.0026721954,-0.0104599,0.013893127,0.0118255615,0.009407043,0.038024902,-0.012367249,0.01876831,-0.032348633,-0.011512756,0.0030441284,-0.009902954,0.033843994,-0.006542206,-0.030075073,-0.00920105,-0.014717102,-0.031341553,0.0072288513,0.020767212,0.042877197,-0.01335907,0.050842285,-0.011100769,-0.019424438,0.008590698,0.015045166,-0.011405945,-0.013832092,0.016220093,0.012229919,0.03543091,0.011314392,0.009819031,-0.025436401,-0.01626587,-0.0021877289,-0.008644104,-0.015205383,-0.008033752,0.016616821,0.027893066,0.0057640076,0.015151978,0.027633667,0.015022278,0.025512695,0.0054740906,0.044189453,0.023162842,-0.024047852,0.01109314,0.011299133,-0.011177063,-0.009506226,-0.009460449,0.005996704,-0.026977539,-0.0058250427,0.00044631958,0.04333496,-0.020401001,0.016479492,-0.008552551,-0.019058228,-0.05496216,-0.011390686,-0.048065186,0.006526947,0.022567749,0.016494751,0.020309448,0.010902405,-0.03152466,0.005092621,0.019897461,0.000957489,-0.02709961,-0.021469116,0.005214691,0.015434265,0.0059394836,0.023345947,-0.030303955,-0.019119263,0.010063171,0.008010864,0.0044898987,-0.018859863,0.023391724,0.032409668,-0.026260376,-0.027770996,0.020217896,0.011329651,-0.008636475,0.002998352,0.009552002,0.04232788,0.03866577,0.012619019,0.027297974,0.014640808,-0.031982422,0.05117798,-0.010543823,0.025146484,-0.021621704,-0.013023376,-0.030334473,-0.007205963,0.012016296,0.0061798096],"createdAt":"2026-04-18T18:39:47.450Z","updatedAt":"2026-04-28T06:33:39.770Z","lastSeenAt":"2026-04-28T06:33:39.770Z","tsv":"'/api/v1/accounts/52/balance':49,159 '0.02':75,137 '000':80 '0x8335':68 '20':79 '2913':69 '6':84 'Base network API' 'USDC micropayment API' 'access':37,51 'account':4,18,38,177 'account balance API' 'account-balance' 'account-specif':176 'advertis':90 'ai':106 'analysi':110 'analyt':100 'api':36,97,142,168 'appear':162 'balanc':5,19,39 'base':8,22,63,81 'base-network' 'broader':87 'call':12,26 'catalog':169 'classif':113 'commit':150 'connect':188 'content':194 'contract':67 'convers':130 'cost':73 'crypto-gated endpoint' 'data':99,103 'decim':85 'doc':182 'document':180 'embed':114 'endpoint':6,20,30,133,155,202 'estim':124 'exact':197 'exchang':119 'export':104 'feed':118 'financ':115 'gas':123 'gate':3,17,96 'generat':131 'geocod':128 'howev':152 'http':53 'infrastructur':126 'insight':105 'intern':174 'json':57 'json-api' 'key':143 'learn':108 'limit':146 'list':135,157 'lookup':40 'lowpaymentfee' 'lowpaymentfee.com':32,88 'machin':107 'maximum':72 'may':171 'metric':101 'minimum':149 'network':64 'no-api-key' 'page':181 'paid':9,23 'pay-per-call API' 'payment':44,58 'per':11,25,77,138 'per-cal':10,24 'per-call-pricing' 'platform':89,165 'post':54 'premium':35 'price':117,183 'prompt':190 'protocol':45 'provid':33 'public':167 'quot':122 'rate':120,145 'readm':184 'report':102 'request':78,139 'request/response':198 'requir':151 'resourc':48,179 'return':56,185 'schema':199 'sentiment':109 'settl':60 'span':98 'specif':47,154,178 'substant':193 'suit':92 'summar':112 'text':111 'token':121 'unit':82 'unknown':204 'usdc':14,28,66,76 'usdc-settlement' 'use':65 'util':127 'valid':129 'via':41,52 'wallet':189 'web3':116 'x402':2,16,43,95 'x402 balance check' 'x402-gated':1,15,94 'x402-payment'","prices":[{"id":"77c44c91-74c1-4b8f-99cf-1f02432394a2","listingId":"2f0aa3ac-bff6-4f66-9b57-326ae986b1cc","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/52/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":"2026-04-18T18:39:47.450Z"}],"sources":[{"listingId":"2f0aa3ac-bff6-4f66-9b57-326ae986b1cc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/52/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:47.450Z","lastSeenAt":"2026-04-28T06:33:39.770Z"}],"details":{"listingId":"2f0aa3ac-bff6-4f66-9b57-326ae986b1cc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/52/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 returns maxAmountRequired of 20000 in USDC (6 decimals) on Base network, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/accounts/52/balance"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/accounts/52/balance"},{"claim":"Documentation pages returned only a 'Connect wallet' prompt with no substantive content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying an account balance via a pay-per-call x402 endpoint","Integrating USDC micropayments into automated agent workflows","Accessing premium data without API key registration"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Developers wanting zero-signup, pay-per-call API access","Automated workflows needing on-demand account balance lookups"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk/subscription pricing","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.931Z"},"updatedAt":"2026-04-28T06:33:39.770Z"}}