{"id":"96c0273d-e021-43ac-8d09-d9226849d97c","shortId":"LhC6WW","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/131/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 site-wide $0.02/request pricing advertised across all endpoints.\n\nlowpaymentfee.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 per-request pricing with no API keys, no rate limits, and no minimum commitments. Payments settle in USDC on the Base L2 network.\n\nThe specific endpoint probed here (`/api/v1/accounts/131/balance`) is listed under the title \"Premium API Access\" but its actual functionality — returning an account balance — is not well-documented. The crawled docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no additional technical documentation, schemas, or example responses. The endpoint is confirmed live (returns a valid x402 402 challenge), but the lack of documentation makes it difficult to know what request body to send or what response shape to expect.","tags":[],"capabilities":["x402-payment","usdc-base","account-balance","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No request body schema or response schema provided","The endpoint path references a specific account ID (131); unclear if this is parameterizable or a fixed demo","The description 'Premium API Access' is generic and does not explain what data is returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/131/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/131/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 pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the docs/pricing/API pages all render only a wallet-connect prompt. The actual purpose of this specific endpoint (account 131 balance) is opaque.","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":"2026-04-19T01:19:12.798Z","embedding":[0.0025749207,0.0063476562,0.04626465,0.0077209473,0.026870728,-0.035888672,-0.015022278,0.022262573,0.06274414,-0.06744385,0.04714966,-0.052520752,-0.04309082,-0.026504517,-0.00541687,0.023910522,-0.028152466,0.024230957,-0.06536865,0.040863037,0.013946533,-0.028869629,-0.0012130737,0.040374756,-0.018508911,-0.038513184,0.00025749207,-0.029052734,-0.034332275,-0.0309906,0.04598999,-0.024978638,-0.0018577576,0.0138549805,0.01626587,0.0054969788,0.005458832,0.034942627,0.04727173,-0.014724731,-0.013069153,-0.046203613,0.008430481,0.011680603,-0.027709961,0.008262634,0.010551453,-0.02619934,-0.00035214424,-0.006401062,-0.04525757,0.01448822,0.02470398,0.00680542,0.010856628,0.032348633,-0.011413574,-0.022918701,0.024017334,0.025817871,-0.010108948,-0.054870605,-0.0149002075,0.00044870377,0.014671326,0.053833008,-0.0043678284,0.047332764,-0.005138397,0.046081543,0.024719238,0.07501221,0.030014038,0.00022220612,0.011131287,-0.02607727,0.015350342,0.018859863,-0.025131226,-0.04562378,-0.014892578,-0.028869629,-0.0803833,-0.004459381,-0.0033035278,-0.050842285,-0.017166138,0.01374054,-0.028152466,0.04333496,-0.083618164,-0.022064209,0.021347046,0.021621704,0.013809204,-0.027511597,-0.008834839,0.013305664,0.0016708374,0.0044288635,0.01134491,-0.012672424,0.039978027,-0.021255493,0.05368042,0.043121338,0.02017212,0.020202637,-0.013999939,-0.001036644,-0.030471802,-0.005054474,-0.0052604675,-0.03314209,-0.0011777878,0.014579773,-0.04019165,0.0127334595,-0.022109985,0.01158905,-0.037872314,0.07550049,0.013755798,-0.020339966,0.013961792,-0.055267334,-0.0053749084,0.015403748,-0.02696228,0.00945282,0.03253174,0.0030288696,0.01071167,-0.019088745,-0.040496826,0.021530151,-0.01687622,-0.017440796,-0.039642334,-0.0052986145,0.027557373,-0.012710571,0.025283813,0.0069999695,-0.09124756,-0.00085163116,-0.029541016,0.019210815,-0.032440186,0.005180359,0.0062217712,0.019729614,-0.015312195,-0.01033783,-0.025527954,-0.03125,0.0019302368,0.022094727,0.005493164,0.052368164,0.0101623535,0.025894165,0.034942627,0.0035800934,0.0309906,0.039367676,-0.012031555,-0.056365967,-0.089416504,-0.02053833,-0.0032234192,-0.01725769,-0.035461426,-0.0011205673,-0.013595581,-0.06665039,-0.018722534,-0.005672455,-0.030166626,-0.019515991,-0.003232956,-0.020629883,0.011024475,-0.008705139,-0.050811768,-0.005191803,-0.00040721893,0.06274414,0.02507019,0.02130127,0.014190674,0.018539429,0.059143066,0.0340271,-0.016738892,-0.02848816,0.0085372925,-0.008773804,0.020492554,0.011894226,0.02722168,-0.028381348,0.032104492,0.03616333,-0.01777649,-0.0011777878,0.023208618,-0.043518066,-0.052490234,-0.028076172,0.015792847,0.0075302124,-0.0027198792,0.014656067,-0.03552246,-0.010444641,0.005001068,0.022262573,0.009086609,0.06427002,-0.0041885376,0.008598328,0.026626587,0.01020813,-0.053253174,0.025756836,0.05407715,0.021347046,-0.010231018,-0.035003662,0.023269653,0.026992798,-0.017623901,-0.001077652,0.0025749207,0.01448822,0.010429382,0.023925781,0.033203125,-0.020629883,-0.011260986,-0.009513855,0.00566864,0.019042969,0.009773254,-0.0103302,-0.036102295,-0.07952881,0.054351807,0.07080078,0.021972656,-0.0073280334,0.0046310425,-0.03552246,-0.039093018,-0.054351807,0.037475586,0.054351807,-0.008140564,-0.042022705,0.026626587,-0.0079193115,-0.03225708,-0.03024292,-0.010131836,-0.025665283,-0.012451172,-0.016296387,-0.074279785,0.02986145,-0.0010118484,0.035003662,0.04348755,0.0038452148,-0.064086914,-0.0262146,0.013679504,0.016342163,-0.028869629,-0.0011062622,-0.019012451,0.029312134,0.02796936,-0.005924225,0.008491516,-0.0055999756,-0.022979736,-0.00090646744,0.023773193,-0.010772705,-0.030044556,0.029541016,0.011932373,-0.041107178,0.014770508,0.016067505,0.043029785,-0.04534912,0.04574585,-0.016799927,0.00011652708,0.044311523,-0.009384155,-0.05239868,0.035949707,0.0061531067,0.053466797,0.058410645,0.019058228,0.005092621,0.0039367676,0.062683105,-0.017807007,-0.0029449463,0.023025513,0.03164673,0.029907227,-0.008804321,-0.06878662,-0.044952393,0.0030555725,-0.028381348,0.016998291,-0.017837524,0.01826477,0.00617218,0.02684021,-0.015670776,-0.0053482056,-0.043395996,-0.0049743652,-0.014526367,0.011711121,-0.028945923,-0.022445679,0.020965576,0.018600464,-0.0053367615,-0.00856781,0.050720215,0.018585205,-0.030471802,-0.002696991,-0.028045654,-0.022476196,-0.01424408,0.02748108,-0.0018463135,0.003458023,0.024856567,-0.02619934,0.0060539246,0.024963379,-0.002281189,0.04067993,0.00705719,0.0022258759,-0.053100586,-0.037109375,-0.018203735,-0.04510498,0.0015954971,0.019226074,-0.0039596558,0.05368042,0.00060129166,-0.012763977,-0.02848816,0.04525757,-0.03262329,0.008331299,0.030288696,-0.027191162,-0.037750244,-0.013557434,0.016448975,0.017791748,0.019760132,0.0023555756,0.026260376,0.07836914,0.04699707,0.01474762,0.0020713806,0.041870117,0.029129028,-0.0047416687,-0.0015897751,-0.035339355,-0.016494751,0.028411865,-0.027252197,-0.018417358,-0.08666992,0.059295654,0.008834839,0.07739258,0.015060425,0.020843506,0.026870728,-0.011634827,0.03237915,-0.055999756,-0.0423584,-0.03213501,-0.030166626,0.017196655,-0.009399414,0.015327454,-0.0309906,0.027252197,0.016738892,0.02142334,-0.037353516,0.05444336,-0.00617218,-0.017562866,0.031036377,0.011764526,0.036010742,0.050323486,-0.04147339,0.013847351,0.0050315857,-0.027191162,-0.014877319,0.025924683,-0.0076904297,-0.024307251,-0.07324219,-0.0079422,0.011962891,-0.014320374,-0.07165527,-0.0036640167,0.006252289,0.026062012,0.021255493,-0.022415161,-0.031799316,0.010902405,-0.016647339,-0.07324219,-0.008781433,-0.018249512,0.02418518,0.020446777,-0.034576416,0.020584106,0.005771637,0.008178711,-0.007709503,0.023773193,-0.017944336,0.0028247833,-0.022125244,0.032806396,0.011787415,0.020599365,0.014259338,0.056243896,0.025436401,0.025299072,0.03439331,0.02897644,-0.0022468567,-0.05392456,0.009780884,-0.06439209,0.015792847,0.028289795,-0.02810669,0.0056648254,0.0010251999,-0.041900635,-0.00011521578,0.0076522827,-0.02722168,0.018569946,0.026351929,-0.04837036,-0.035858154,-0.042297363,-0.015571594,0.009552002,0.06549072,0.016189575,0.010856628,-0.027786255,-0.010948181,0.015960693,0.008262634,0.0013780594,-0.014282227,-0.018539429,-0.03692627,0.0033874512,-0.0335083,-0.002193451,0.023529053,0.0037136078,-0.018051147,0.013809204,-0.011070251,0.003528595,-0.009422302,0.017608643,0.027511597,-0.038513184,0.012763977,-0.006072998,0.02911377,-0.007865906,-0.030731201,-0.05987549,0.031311035,0.006126404,0.028747559,-0.03250122,0.008071899,0.0128479,0.011955261,0.0024166107,-0.027297974,-0.0075531006,0.007980347,-0.02810669,-0.093933105,0.052947998,-0.016494751,0.03149414,-0.0017499924,-0.0026721954,0.029449463,-0.0027313232,0.01676941,0.024658203,-0.024887085,-0.0048217773,-0.029724121,-0.01939392,-0.016830444,0.0027809143,0.00039815903,0.0154800415,-0.024215698,0.022064209,-0.01084137,-0.018249512,0.02784729,0.009262085,0.0006713867,0.029190063,0.00064086914,-0.0013875961,0.047576904,0.016342163,-0.0635376,0.039123535,0.010719299,-0.005050659,-0.009963989,0.05078125,0.0076522827,-0.016662598,0.005142212,-0.013755798,0.003168106,-0.019927979,-0.0052757263,0.01260376,0.050201416,0.02104187,-0.04748535,0.019622803,0.018936157,-0.026870728,-0.009185791,0.029907227,0.027511597,-0.046905518,0.007419586,0.0030994415,0.031066895,-0.040039062,0.006008148,0.0023937225,0.027374268,0.0132751465,0.016311646,-0.004386902,0.01335144,-0.018753052,0.021270752,0.0022029877,-0.028518677,-0.025146484,-0.011474609,0.02368164,0.015670776,0.0038967133,-0.0009627342,-0.019760132,-0.009063721,0.00007367134,-0.003452301,0.03250122,0.016677856,0.017791748,-0.0066566467,0.0005311966,0.02961731,-0.04736328,-0.009391785,-0.0028266907,0.039245605,-0.0029182434,-0.010467529,0.03378296,0.005088806,0.036193848,-0.038482666,-0.02243042,-0.0044021606,0.0019016266,-0.01134491,-0.058563232,-0.026031494,-0.014472961,0.023086548,-0.011192322,0.00299263,0.033843994,-0.0104904175,0.0011816025,0.0149383545,0.018722534,-0.012298584,0.004753113,-0.057556152,-0.009094238,-0.011276245,-0.01687622,-0.041748047,0.014785767,-0.048858643,-0.025741577,-0.004463196,-0.015289307,0.003868103,-0.003742218,-0.0029506683,0.03918457,-0.0058937073,0.008476257,-0.0009484291,-0.020050049,-0.0036811829,-0.0043144226,0.022109985,-0.05505371,0.019943237,-0.011993408,-0.004951477,-0.02229309,-0.006778717,0.02355957,0.00667572,0.019134521,0.034240723,-0.04812622,0.03173828,-0.013252258,-0.0074768066,-0.0060157776,-0.011154175,-0.00289917,-0.020339966,-0.012283325,0.032989502,-0.0021781921,-0.012123108,-0.02168274,-0.032073975,-0.020812988,-0.044525146,0.035339355,0.014091492,0.049102783,-0.018875122,-0.010505676,0.01499176,0.019546509,-0.0029582977,-0.017166138,-0.0065345764,0.01197052,0.013092041,-0.0016174316,-0.030532837,-0.021835327,-0.016464233,-0.0061836243,-0.049835205,-0.043426514,-0.0152282715,0.023483276,0.008880615,-0.014465332,-0.022857666,-0.021713257,-0.0037059784,-0.027862549,0.012008667,-0.008270264,0.021408081,-0.006580353,-0.010276794,0.009384155,-0.0010108948,-0.026870728,0.034118652,0.011924744,-0.0077819824,-0.019592285,-0.010879517,0.018737793,-0.008575439,0.001449585,-0.025527954,-0.01222229,-0.0126953125,-0.06213379,0.008468628,0.00082588196,0.009490967,-0.012588501,-0.003440857,-0.03930664,-0.014183044,-0.01889038,-0.015274048,0.003967285,0.014785767,0.0029773712,0.004711151,0.0005836487,-0.009880066,-0.0079574585,-0.023147583,-0.000029444695,0.01008606,-0.014724731,0.012229919,0.05444336,-0.0032215118,-0.027404785,-0.007820129,-0.0022506714,0.012298584,-0.018722534,-0.0021152496,0.00655365,0.02331543,-0.0058021545,-0.01878357,-0.042022705,-0.00566864,0.064697266,-0.011474609,-0.009513855,-0.012969971,0.00756073,0.016815186,0.037322998,-0.041534424,0.013809204,-0.03918457,0.03225708,-0.017654419,0.033813477,0.009635925,0.01878357,-0.014472961,-0.03866577,0.00459671,0.038757324,-0.016311646,-0.0670166,-0.011428833,-0.070495605,-0.015068054,-0.021118164,-0.01927185,0.00920105,0.0051078796,-0.028366089,-0.072021484,0.010467529,0.04522705,0.010375977,0.020477295,-0.0024700165,0.00699234,0.031555176,-0.013664246,-0.025009155,0.010154724,-0.019226074,-0.010528564,-0.018585205,0.023849487,-0.011207581,-0.024734497,0.017425537,-0.0024700165,0.011199951,-0.018066406,0.014503479,-0.014770508,0.0026474,-0.010047913,0.0019111633,-0.0064086914,-0.011390686,0.03326416,-0.05883789,0.02558899,0.0021800995,0.020004272,0.0031585693,0.015136719,0.019622803,-0.044708252,-0.0073280334,0.012390137,-0.002073288,0.022277832,-0.027786255,0.047668457,0.021606445,0.00111866,0.017700195,-0.027740479,-0.0035991669,-0.041015625,-0.025390625,0.033416748,-0.0057678223,0.014526367,-0.021591187,-0.009414673,0.016906738,-0.0034313202,-0.008125305,-0.013595581,-0.0003323555,-0.013015747,0.019836426,-0.010505676,0.042541504,-0.00699234,0.025512695,0.029937744,0.0423584,0.015136719,-0.006980896,-0.0028705597,0.008422852,-0.019638062,0.0046310425,0.011871338,0.024673462,0.0024108887,0.015197754,0.020004272,-0.026245117,-0.025878906,-0.010124207,-0.02444458,0.018371582,-0.026550293,0.012077332,0.003835678,0.011550903,-0.025772095,-0.032836914,-0.0038032532,-0.02003479,-0.012367249,-0.0071411133,0.007045746,0.0079193115,0.01966858,0.00028944016,-0.000009298325,-0.006832123,0.032165527,-0.008415222,-0.006839752,0.009895325,0.04547119,0.0019607544,-0.020492554,0.000992775,-0.0020580292,-0.0022621155,0.0022468567,0.00466156,0.019714355,0.025299072,-0.0069274902,0.028305054,-0.0079193115,0.052734375,-0.011222839,0.013442993,0.005050659,0.0034542084,0.0015535355,0.03857422,-0.03668213,0.0101623535,0.005504608,-0.024017334,-0.0023498535,-0.019302368,-0.019851685,0.0037384033,0.0016002655,-0.02166748,0.022018433,0.011474609,0.021240234,-0.031341553,-0.002922058,0.0013046265,-0.03930664,-0.027145386,0.008262634,-0.0069274902,-0.0028648376,0.016204834,-0.0259552,0.0039596558,-0.029785156,0.02407837,0.0031394958,0.01586914,-0.01424408,-0.030273438,-0.017944336,-0.011238098,-0.008636475,0.0064048767,0.004299164,0.053222656,0.030456543,0.033172607,0.02468872,0.032287598,0.0057373047,-0.04699707,-0.01525116,0.018951416,-0.006000519,0.018493652,-0.034576416,0.04071045,0.065979004,-0.0022621155,0.031036377,0.05215454,0.04473877,-0.0010261536,0.013755798,-0.008987427,0.020996094,-0.008003235,0.021377563,-0.0039634705,0.017959595,-0.020706177,0.019943237,-0.005783081,0.030426025,-0.02784729,0.021057129,0.079711914,0.0151901245,-0.005924225,0.026443481,-0.016220093,-0.0102005005,-0.008903503,-0.031555176,0.054718018,0.001209259,0.0423584,0.025482178,0.008354187,-0.03062439,0.022018433,0.0021247864,-0.044525146,0.04977417,0.00356102,-0.016281128,-0.002166748,-0.009086609,0.0152282715,-0.05255127,-0.020248413,0.032196045,-0.017288208,0.01676941,-0.0076522827,0.005016327,0.0029392242,0.008628845,-0.00051546097,0.02180481,-0.020767212,0.0052719116,0.014167786,0.01687622,0.016418457,0.014877319,0.033935547,-0.032409668,-0.011528015,0.009605408,0.02078247,0.013999939,-0.0039863586,0.03012085,0.01826477,0.046844482,0.037017822,-0.017364502,0.008857727,0.039031982,0.0068244934,-0.009346008,0.052886963,0.0126571655,0.024017334,0.037750244,0.045288086,0.0335083,-0.019592285,0.017929077,-0.0023097992,-0.00021123886,-0.00491333,0.0027427673,0.0057868958,-0.009712219,0.031311035,-0.0042152405,-0.003452301,0.018814087,0.029541016,-0.018844604,0.0016946793,0.0038166046,0.007007599,0.0006637573,0.00063323975,0.009292603,-0.01965332,-0.0038833618,0.016693115,0.021240234,-0.035003662,0.011367798,-0.0033512115,-0.018157959,-0.014411926,0.012969971,-0.047027588,0.011428833,0.0042686462,-0.008842468,-0.030197144,0.016830444,0.0027103424,-0.008041382,0.036010742,0.020690918,0.004009247,0.0063819885,0.018081665,0.038269043,0.0051078796,-0.006122589,-0.0055236816,0.007980347,0.03540039,-0.010055542,-0.005622864,-0.02810669,-0.00072288513,0.019836426,-0.008628845,-0.0184021,0.005718231,-0.006000519,-0.02267456,-0.0036506653,0.04547119,0.008575439,0.036987305,-0.0129776,-0.008132935,-0.0017337799,0.038513184,0.009544373,-0.023284912,-0.01914978,0.021102905,-0.014472961,0.043701172,0.055236816,-0.014389038,0.007457733,0.0031433105,-0.012969971,-0.012763977,-0.02508545,0.019104004,-0.029449463,0.015945435,0.015670776,0.014785767,-0.030700684,-0.010414124,-0.0047798157,-0.030548096,-0.015838623,-0.023345947,0.0031585693,0.00078105927,0.029724121,0.0069732666,0.029708862,-0.013496399,0.06335449,-0.0079422,0.0635376,0.0059890747,-0.013313293,0.03463745,0.028030396,0.026000977,0.01210022,0.01864624,-0.023361206,0.0063095093,0.022750854,0.0096206665,0.010070801,0.009567261,-0.016799927,0.037841797,-0.03050232,0.03366089,-0.008361816,-0.0037441254,0.0119018555,-0.024902344,-0.019439697,0.0033874512,-0.0062408447,0.0044555664,0.0395813,-0.0074005127,-0.013519287,-0.016021729,-0.016830444,0.024917603,-0.012908936,-0.0052375793,-0.010314941,-0.006843567,0.021713257,-0.012527466,-0.015853882,0.0064888,0.017333984,-0.035705566,-0.017562866,0.0061912537,0.026809692,-0.029129028,0.0335083,0.030761719,-0.005191803,-0.005344391,0.054229736,-0.0024700165,0.019180298,0.005935669,0.054656982,0.041107178,0.006088257,-0.012008667,0.023025513,0.03137207,-0.02029419,0.01348114,0.04748535,0.004459381,0.013587952,-0.002960205,-0.019424438,0.0004720688,-0.009376526,-0.019683838,-0.0068893433,-0.023620605,-0.009002686,-0.003435135,0.008972168,-0.0050201416,0.01134491,-0.009849548,-0.016586304,0.011177063,0.03945923,0.013496399,-0.046203613,-0.006210327,0.013420105,0.018737793,-0.020599365,-0.02168274,-0.005958557,-0.03564453,0.005455017,0.028366089,0.0013866425,-0.010429382,-0.02810669,-0.00009095669,0.053894043,0.01651001,0.008354187,0.022064209,-0.01739502,0.019927979,-0.012649536,0.004512787,0.0024662018,-0.019424438,-0.0005302429,0.020721436,-0.0059890747,-0.012138367,0.0128479,0.01626587,0.011528015,0.0060043335,0.008110046,0.022949219,-0.016815186,-0.0079422,0.009750366,0.014312744,-0.03225708,-0.041168213,-0.0128479,0.022521973,0.052856445,-0.016403198,-0.013679504,-0.022323608,0.031204224,0.02859497,0.046325684,0.0016841888,0.048797607,0.015380859,-0.001996994,-0.0206604,0.023330688,0.0021362305,-0.011550903,0.015419006,-0.019546509,-0.006149292,-0.00315094,0.020141602,0.011512756,-0.010894775,-0.016555786,-0.019424438,-0.004550934,0.016082764,-0.030426025,0.015434265,-0.033447266,-0.01739502,0.020828247,0.0047187805,-0.013549805,-0.041381836,-0.019515991,-0.014656067,-0.0670166,0.007965088,-0.016815186,-0.013702393,-0.029541016,0.0070266724,-0.013435364,0.029907227,-0.00010621548,-0.0010099411,0.011749268,0.021011353,0.006164551,-0.004562378,0.025436401,-0.02494812,-0.022613525,0.0024032593,-0.012680054,-0.0032482147,0.028930664,-0.0309906,0.035858154,0.0073623657,0.0053367615,0.0074043274,-0.010108948,-0.015022278,0.009170532,-0.05105591,-0.016281128,0.010932922,0.022964478,0.0021820068,-0.006008148,0.04876709,-0.01689148,-0.019515991,0.025314331,0.050048828,-0.006011963,0.06555176,-0.033966064,0.0017175674,-0.03250122,-0.00001001358,-0.00422287,0.0109939575,0.005973816,0.012176514,0.0056648254,0.01789856,0.013137817,-0.021743774,-0.02268982,0.032714844,0.019515991,-0.013946533,0.040649414,0.012756348,0.0027656555,-0.022354126,-0.007484436,0.011199951,0.04586792,0.009971619,0.015136719,-0.02255249,0.005367279,-0.010314941,0.011741638,0.030014038,-0.027923584,-0.032196045,-0.007297516,-0.012298584,0.012252808,-0.005088806,0.0070724487,-0.0057296753,0.01133728,-0.0413208,-0.023147583,-0.032165527,0.018051147,0.0009160042,-0.0053977966,0.0062179565,0.00038313866,-0.0013837814,-0.03189087,-0.000018000603,-0.047210693,-0.024551392,-0.0026626587,-0.0154418945,0.017288208,0.0034389496,-0.010757446,0.008880615,0.0062789917,-0.0005874634,0.0076828003,0.020767212,-0.011756897,-0.0052757263,0.03237915,0.013885498,-0.009841919,-0.005191803,-0.005455017,-0.0026550293,0.035003662,0.007675171,0.0035057068,-0.007858276,0.015350342,0.012619019,0.0055236816,0.03375244,-0.01361084,0.029724121,-0.037597656,-0.016021729,-0.0031204224,-0.011306763,0.035339355,-0.0063476562,-0.03265381,-0.014785767,-0.012863159,-0.03060913,0.006351471,0.010787964,0.034484863,-0.009796143,0.041137695,-0.021881104,-0.02368164,0.009056091,0.008453369,-0.016342163,-0.0035057068,0.025543213,0.006717682,0.039001465,0.001115799,0.00434494,-0.021102905,-0.012382507,-0.0017614365,-0.0070762634,-0.009773254,-0.002357483,0.017608643,0.0256958,0.009719849,0.0154418945,0.02796936,0.012825012,0.033111572,0.012969971,0.045410156,0.037872314,-0.02507019,0.011100769,0.010215759,-0.014762878,-0.004508972,-0.0107040405,0.015563965,-0.026016235,-0.0018091202,0.0021476746,0.037841797,-0.011878967,0.012268066,-0.01134491,-0.017333984,-0.050079346,-0.0012645721,-0.05407715,0.0059890747,0.024841309,0.0075950623,0.024276733,0.0116119385,-0.034057617,0.0067596436,0.025421143,-0.0036678314,-0.030471802,-0.016113281,-0.009651184,0.024795532,0.0060691833,0.029342651,-0.027511597,-0.032592773,0.006778717,0.011009216,0.006401062,-0.024307251,0.020507812,0.027282715,-0.014839172,-0.02267456,0.02281189,0.008308411,0.0009870529,0.006401062,0.004070282,0.039520264,0.04135132,0.00459671,0.018539429,0.019821167,-0.03302002,0.049835205,-0.015159607,0.032928467,-0.025436401,-0.014892578,-0.027770996,-0.008979797,0.00157547,0.0022563934],"createdAt":"2026-04-18T18:40:59.994Z","updatedAt":"2026-04-27T22:03:23.218Z","lastSeenAt":"2026-04-27T22:03:23.218Z","tsv":"'/api/v1/accounts/131/balance':46,163 '/request':85 '0.02':74,84,133 '000':69 '20':68 '402':218 'Base network API' 'USDC micropayment API' 'access':171 'account':4,18,35,178 'account balance API' 'account-balance' 'across':88 'actual':174 'addit':202 'advertis':87 'ai/ml':104 'analysi':107 'analyt':103 'api':100,140,170,189 'balanc':5,19,36,179 'base':8,22,58,70,155 'behind':49 'bodi':232 'broader':94 'call':12,26 'challeng':62,219 'classif':109 'commit':148 'confirm':212 'connect':197 'consist':78 'convers':126 'cost':66 'crawl':186 'data':102 'difficult':227 'doc':187 'document':184,204,224 'embed':110 'endpoint':6,20,30,90,129,160,210 'estim':120 'exampl':207 'exchang':115 'expect':240 'feed':114 'financ':111 'function':175 'gas':119 'gate':3,17,48,99 'generat':127 'geocod':124 'host':92 'indic':63 'infer':105 'infrastructur':122 'key':141 'know':229 'l2':156 'lack':222 'limit':144 'list':165 'live':213 'lookup':37 'lowpaymentfee' 'lowpaymentfee.com':32,91 'make':225 'maximum':65 'minimum':147 'network':59,157 'no-api-key' 'page':192 'pay':10,24 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request' 'payment':41,55,149 'per':11,25,52,76,135 'per-request':51,134 'premium':169 'price':86,113,137,188 'probe':161 'prompt':199 'protocol':42 'provid':33 'quot':118 'rate':116,143 'readm':191 'render':194 'request':53,77,136,231 'resourc':45 'respons':208,237 'return':176,214 'schema':205 'send':234 'sentiment':106 'settl':150 'shape':238 'share':130 'site':82 'site-wid':81 'span':101 'specif':44,159 'suit':95 'summar':108 'technic':203 'titl':168 'token':117 'unit':71 'usd':75 'usdc':14,28,54,73,152 'usdc-base' 'util':123 'valid':125,216 'via':38 'wallet':198 'web3':112 'well':183 'well-docu':182 'wide':83 'x402':2,16,40,61,98,217 'x402 API' 'x402-gated':1,15,97 'x402-payment'","prices":[{"id":"5cd98de8-c54f-4cd5-99e3-a23448c6bae5","listingId":"96c0273d-e021-43ac-8d09-d9226849d97c","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/131/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":"2026-04-18T18:40:59.994Z"}],"sources":[{"listingId":"96c0273d-e021-43ac-8d09-d9226849d97c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/131/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:59.994Z","lastSeenAt":"2026-04-27T22:03:23.218Z"}],"details":{"listingId":"96c0273d-e021-43ac-8d09-d9226849d97c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/131/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 (USD Coin) on the Base network, equating to $0.02 per request.","source_url":"https://lowpaymentfee.com"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The site hosts endpoints across data & analytics, AI/ML, finance & Web3, and infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying account balance information via a single paid API call","Integrating pay-per-request balance lookups into agent workflows","Demonstrating x402 protocol payment flows on Base"],"bestFor":["Agents or developers needing on-demand account balance data without API key management","x402 protocol experimentation and integration testing","Low-volume, pay-as-you-go API consumption"],"notFor":["High-volume balance polling where per-request fees add up quickly","Users who need detailed API documentation and response schemas before integrating","Use cases requiring non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.536Z"},"updatedAt":"2026-04-27T22:03:23.218Z"}}