{"id":"e4e12aaa-d734-48d8-ae67-a6924b0f5353","shortId":"4T4Lnh","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/accounts/128` is labeled \"Premium API Access\" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com platform advertises endpoints across four categories: 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 are listed at the same $0.02/request price point. However, this specific listing covers only the `/api/v1/accounts/128` endpoint, whose exact functionality beyond \"Premium API Access\" is not documented in the crawled material.\n\nThe endpoint is live and returns a well-formed x402 challenge (HTTP 402) with version 1 of the protocol. Documentation pages (/docs, /pricing, /README) all resolve but contain only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-gateway","misc"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The exact functionality of /api/v1/accounts/128 is undocumented — 'Premium API Access' is the only description available.","All documentation pages (/docs, /pricing, /README) contain no substantive content.","No request body schema or response schema is available; callers must discover behavior experimentally.","The broader platform lists many endpoints but none have documented input/output contracts."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/128","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/128","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 documentation of what the endpoint actually does, no request/response schema, and no examples. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is effectively a stub with confirmed liveness and pricing.","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":"2026-04-19T01:17:06.018Z","embedding":[-0.024154663,-0.026397705,0.044281006,0.017929077,0.02243042,-0.033935547,-0.019638062,0.028076172,0.06689453,-0.07519531,0.03982544,-0.05065918,-0.024246216,-0.033599854,-0.030853271,0.013160706,-0.0021209717,0.0016641617,-0.031341553,0.026657104,0.023330688,-0.023391724,-0.019195557,0.027938843,-0.001159668,-0.018859863,-0.009719849,-0.018951416,-0.01537323,-0.044647217,0.03604126,-0.029129028,-0.0004968643,0.01802063,-0.0075683594,-0.033294678,-0.0075531006,0.037109375,0.032806396,-0.014274597,-0.0056266785,-0.04748535,0.0065574646,0.005138397,-0.06567383,-0.0026817322,0.0047912598,-0.024139404,-0.005504608,0.009284973,-0.035736084,-0.0041122437,0.0028572083,0.0013027191,0.01889038,0.01436615,-0.005344391,-0.009597778,0.011222839,0.022659302,-0.004234314,-0.05105591,-0.0104522705,-0.014343262,0.013664246,0.06414795,-0.013641357,0.047973633,0.019943237,0.05911255,0.041900635,0.066223145,0.028579712,0.017990112,-0.0018224716,-0.0029773712,0.009010315,0.059265137,-0.0035514832,-0.023162842,-0.017807007,-0.010551453,-0.04348755,0.007850647,-0.015960693,-0.042419434,-0.009124756,0.016479492,-0.015670776,0.025299072,-0.063964844,0.009727478,-0.012611389,0.006214142,0.016830444,-0.005897522,-0.015304565,0.020065308,-0.016571045,0.007835388,0.011367798,-0.036987305,0.021957397,0.001247406,0.037506104,0.062286377,0.025131226,0.026519775,0.009429932,-0.011947632,-0.02154541,0.02053833,-0.004333496,-0.020843506,0.0049858093,0.006679535,-0.025878906,0.011306763,-0.026138306,0.007144928,-0.04611206,0.053833008,0.028900146,-0.0126571655,0.015777588,-0.047332764,-0.013214111,0.001958847,-0.017211914,-0.006839752,0.014701843,0.007156372,0.03616333,-0.020339966,-0.037322998,0.015281677,-0.003967285,-0.03201294,-0.049072266,-0.03677368,0.046905518,-0.032989502,0.007381439,0.025527954,-0.09338379,-0.015777588,-0.057434082,0.00041937828,-0.040496826,0.001666069,-0.010147095,0.018829346,-0.020095825,-0.0032520294,-0.03152466,-0.019943237,0.004863739,0.027313232,-0.016296387,0.060546875,-0.002822876,0.024597168,0.03527832,0.009025574,0.02507019,0.038208008,-0.0007801056,-0.062194824,-0.0881958,-0.013809204,-0.0016765594,-0.0032806396,-0.03274536,0.0034370422,-0.008644104,-0.06567383,-0.025390625,-0.0020275116,-0.007045746,-0.0335083,-0.0027179718,-0.022735596,0.014976501,0.0017747879,-0.07110596,-0.018814087,-0.025726318,0.0725708,0.025421143,0.01878357,0.030380249,-0.0065078735,0.059020996,0.028152466,-0.023635864,-0.03527832,0.028320312,-0.012428284,-0.000073730946,-0.0025939941,0.005558014,-0.04257202,0.027435303,0.064086914,0.023101807,-0.016159058,-0.007171631,-0.050811768,-0.03552246,-0.027999878,0.017730713,0.012619019,0.00868988,0.036376953,-0.024017334,-0.028945923,0.008728027,0.0015096664,0.015960693,0.059051514,0.009109497,-0.01209259,0.029022217,0.023391724,-0.0524292,0.037475586,0.042114258,0.023864746,-0.022033691,-0.027252197,0.02760315,0.038726807,-0.0234375,0.015571594,-0.019058228,0.036254883,-0.007686615,0.01965332,0.029922485,-0.020401001,-0.015136719,-0.028915405,-0.025756836,0.028152466,0.012260437,-0.027420044,-0.031799316,-0.08831787,0.042938232,0.03616333,0.041748047,-0.0073547363,0.0063056946,-0.034698486,-0.007648468,-0.07080078,0.055633545,0.06274414,-0.012649536,-0.0070991516,0.017120361,-0.013465881,-0.042510986,0.0025939941,-0.003648758,-0.03338623,-0.02217102,0.013557434,-0.049072266,0.001657486,0.0046577454,0.022766113,0.062408447,-0.00018846989,-0.05456543,-0.02947998,-0.0017137527,0.002067566,-0.020446777,0.014038086,-0.010017395,0.006362915,0.03543091,-0.006340027,0.030136108,-0.0071525574,-0.0035648346,-0.0009880066,0.007381439,-0.017700195,-0.034210205,0.012031555,-0.010749817,-0.064697266,0.005619049,-0.006855011,0.05709839,-0.051239014,0.024353027,-0.015777588,0.006095886,0.056884766,-0.002960205,-0.043914795,0.011169434,0.022735596,0.02357483,0.046325684,0.011558533,-0.037200928,-0.008422852,0.064331055,-0.028045654,-0.017288208,0.018966675,0.019866943,0.030029297,-0.007888794,-0.06390381,-0.024963379,-0.019561768,-0.03173828,0.0098724365,-0.022201538,0.032470703,-0.010467529,0.008781433,-0.030883789,0.0030326843,-0.034606934,0.030090332,-0.0054130554,0.007030487,-0.014953613,-0.008491516,0.0073280334,0.020446777,-0.017364502,-0.0039634705,0.05343628,0.031173706,-0.0053482056,-0.033172607,-0.024749756,-0.014450073,0.0028381348,0.01965332,0.03225708,0.015068054,0.054992676,-0.034240723,0.010131836,0.042877197,0.02142334,0.04168701,-0.01550293,0.016067505,-0.074279785,-0.05999756,-0.016494751,-0.048461914,0.023239136,0.024658203,-0.00038170815,0.052581787,0.0023212433,-0.024139404,-0.05001831,0.025146484,-0.041503906,-0.004611969,0.052001953,-0.023025513,-0.027053833,-0.0073776245,0.0037078857,0.0029640198,0.02709961,0.025939941,0.015350342,0.07720947,0.04574585,0.01737976,0.016143799,0.006275177,0.029876709,-0.0051841736,-0.01966858,-0.030700684,-0.0026569366,0.020462036,-0.008781433,-0.020996094,-0.07531738,0.055877686,0.04031372,0.092285156,0.019042969,-0.0032405853,0.037628174,-0.03353882,0.021774292,-0.029922485,-0.021194458,-0.028182983,-0.041656494,0.023849487,-0.006149292,0.0033454895,-0.0158844,0.03314209,-0.0011692047,0.021484375,-0.02558899,0.048797607,0.004211426,-0.017669678,0.024139404,-0.00016117096,0.043762207,0.05419922,-0.036315918,0.03289795,0.01838684,-0.03286743,0.0048294067,0.038970947,-0.022216797,-0.003993988,-0.05657959,-0.013290405,-0.00008028746,-0.0036945343,-0.05065918,-0.012176514,-0.0016145706,0.02708435,0.02684021,-0.01360321,-0.016357422,-0.0101623535,-0.00856781,-0.060699463,-0.018432617,-0.025283813,-0.005832672,0.04324341,-0.03048706,-0.0037250519,0.018554688,-0.008735657,-0.009284973,0.006958008,0.013587952,0.0026683807,-0.048461914,0.022827148,0.010063171,0.021408081,0.0019874573,0.03540039,0.016159058,0.027435303,0.047088623,0.014724731,-0.016067505,-0.06304932,0.02067566,-0.059906006,-0.0056266785,0.03149414,-0.023223877,-0.008522034,-0.0073776245,-0.027328491,-0.023071289,-0.00085258484,-0.039123535,-0.002023697,0.016998291,-0.021881104,-0.016571045,-0.04727173,-0.0085372925,-0.004463196,0.06964111,0.030166626,0.0072288513,-0.054656982,-0.011871338,0.012214661,0.01776123,0.022903442,-0.0151901245,-0.006538391,-0.022781372,-0.024749756,-0.009506226,-0.010658264,0.016464233,-0.006954193,-0.011528015,0.03289795,-0.0075149536,0.015388489,0.00013244152,0.020339966,0.019500732,-0.026916504,-0.007801056,-0.004638672,0.04019165,-0.0013380051,-0.017425537,-0.05126953,0.045410156,0.018539429,0.035736084,-0.04675293,-0.0044059753,-0.0064468384,0.016860962,0.013519287,-0.013542175,-0.01739502,-0.0067634583,-0.058013916,-0.0690918,0.041625977,-0.019424438,0.025436401,0.008583069,0.0044059753,0.0154953,-0.0064468384,0.011657715,0.021759033,-0.021362305,-0.010147095,-0.02128601,-0.036468506,-0.01979065,-0.013328552,-0.013145447,0.008796692,-0.03010559,0.01751709,0.004360199,-0.018432617,0.021591187,-0.0016698837,-0.0026569366,0.018844604,-0.0042648315,0.015960693,0.046569824,0.010505676,-0.032684326,0.021728516,0.0052948,0.00060606,-0.006149292,0.042297363,0.021972656,-0.00881958,-0.00598526,-0.005001068,-0.0073242188,-0.027359009,0.013267517,0.0032196045,0.020950317,-0.005680084,-0.04550171,0.02394104,0.020248413,-0.02722168,-0.016067505,0.024597168,0.009719849,-0.031463623,0.029205322,0.03225708,0.058898926,-0.02204895,0.0099487305,-0.0015592575,0.02545166,0.024154663,0.009750366,-0.012329102,0.014961243,-0.016464233,0.008239746,0.0014648438,-0.015411377,0.013587952,0.003452301,0.02659607,0.02720642,0.00793457,-0.026123047,-0.031799316,-0.002412796,-0.007820129,-0.022140503,0.025756836,0.024551392,0.025543213,-0.024230957,0.022369385,0.004119873,-0.019882202,-0.01689148,-0.0036907196,0.029129028,-0.009468079,-0.0340271,0.01789856,0.017288208,0.038757324,-0.058807373,-0.015625,0.010025024,0.0064735413,-0.027816772,-0.030197144,-0.035339355,0.0010004044,0.038238525,0.0025577545,0.024230957,0.035125732,0.0052871704,-0.00598526,0.018310547,0.008544922,-0.0074157715,-0.0012722015,-0.048065186,-0.006416321,-0.0071525574,-0.0017528534,-0.03451538,0.014831543,-0.013893127,-0.03173828,0.0065307617,-0.0068855286,-0.000059366226,-0.008285522,0.012191772,0.032958984,-0.0036087036,0.0107421875,-0.018356323,-0.026016235,0.008262634,0.008720398,0.018859863,-0.062408447,0.019241333,-0.0090789795,-0.0104599,-0.0031871796,0.01033783,0.024627686,0.031402588,0.0012226105,0.03375244,-0.056243896,0.03466797,-0.023361206,0.008163452,0.012687683,-0.029373169,-0.004108429,-0.01777649,-0.011138916,0.042114258,-0.023254395,-0.009727478,-0.03253174,-0.03338623,-0.012413025,-0.048706055,0.013809204,0.026168823,0.03778076,-0.02671814,-0.0062294006,-0.0014858246,0.0061569214,-0.025482178,0.004890442,-0.014976501,0.0064811707,0.013114929,0.008262634,-0.027328491,-0.028503418,-0.023834229,-0.0045928955,-0.04067993,-0.0463562,-0.01222229,0.0007882118,-0.004627228,-0.0076065063,-0.020370483,-0.02796936,0.0014228821,-0.040374756,0.018234253,0.00045847893,0.029663086,0.007118225,-0.019073486,0.007888794,0.021087646,-0.013000488,0.037841797,0.023788452,-0.0025672913,-0.027679443,0.004055023,0.03186035,0.0206604,-0.005290985,-0.014038086,-0.013679504,-0.010574341,-0.057739258,-0.009979248,-0.01007843,-0.012565613,-0.017730713,0.00016760826,-0.04837036,0.00026369095,-0.018188477,0.00315094,0.02166748,0.015029907,0.013916016,0.0043144226,0.01020813,-0.012962341,-0.014007568,-0.03262329,0.020492554,0.010925293,0.0016670227,0.015052795,0.046295166,0.009635925,-0.021881104,0.0059776306,-0.0044898987,0.023208618,-0.013771057,0.0015764236,-0.01727295,0.006706238,-0.020523071,-0.02015686,-0.048034668,-0.0032787323,0.09088135,-0.007785797,-0.02583313,-0.01727295,-0.013656616,0.021697998,0.031829834,-0.04006958,-0.0070381165,-0.030059814,0.024383545,-0.026245117,0.020874023,-0.0017366409,0.024902344,-0.017715454,-0.05911255,-0.015991211,0.0024986267,-0.019241333,-0.06085205,-0.013961792,-0.06536865,0.002046585,-0.0077400208,-0.025817871,0.0043678284,0.012809753,-0.016220093,-0.08709717,0.009666443,0.04647827,0.008911133,0.027648926,-0.011161804,0.020523071,0.017150879,-0.036193848,-0.02027893,0.03491211,-0.030319214,-0.00548172,-0.028915405,0.012008667,-0.0154800415,-0.022842407,0.029266357,0.0019016266,0.015464783,-0.004135132,0.0064926147,-0.017333984,0.010772705,-0.0069007874,0.015670776,-0.00705719,-0.007408142,0.034179688,-0.048919678,0.026473999,0.020370483,-0.002204895,0.013908386,0.026657104,0.04647827,-0.04321289,-0.009971619,0.02861023,0.0135269165,0.033966064,-0.029083252,0.04171753,0.017044067,-0.016098022,0.03353882,-0.014343262,-0.024154663,-0.047088623,-0.022567749,0.027435303,-0.013641357,0.024353027,-0.012077332,0.005958557,0.0146484375,-0.0020503998,0.008872986,-0.018157959,-0.024887085,-0.014205933,0.00598526,0.0036945343,0.0051193237,-0.0017843246,0.031433105,0.019332886,0.035736084,0.0138549805,-0.006454468,0.005847931,0.016525269,-0.02607727,0.007144928,0.029052734,0.0017004013,0.0060157776,0.014129639,0.004764557,-0.045898438,-0.011161804,-0.02671814,-0.02154541,-0.006980896,-0.014381409,-0.022735596,-0.0025463104,0.00598526,-0.008598328,-0.028762817,0.006038666,-0.025344849,-0.023529053,-0.0042381287,-0.011856079,0.02229309,0.0063591003,0.008903503,0.012306213,0.00095939636,0.04107666,0.008255005,-0.013221741,0.026000977,0.03326416,0.013259888,-0.020324707,-0.005882263,-0.0143966675,-0.0015134811,-0.0011377335,-0.030715942,0.011383057,0.037994385,-0.009338379,0.0051193237,0.00042057037,0.03250122,-0.0104599,0.00932312,-0.0036010742,0.024536133,-0.005859375,0.032226562,-0.032440186,0.012016296,0.0069122314,-0.003780365,-0.006095886,-0.011291504,-0.04019165,0.011512756,0.0041160583,-0.009475708,0.055633545,0.01209259,0.02532959,-0.020568848,-0.015106201,0.0053634644,-0.024475098,-0.021438599,0.03152466,-0.0019378662,-0.0044059753,0.0146484375,-0.03567505,0.039642334,-0.030197144,0.029312134,-0.005039215,0.006095886,-0.0063934326,-0.032043457,-0.017074585,-0.0073547363,-0.006427765,0.005832672,0.0028209686,0.044952393,0.018310547,0.03515625,0.048065186,0.022644043,-0.001329422,-0.03503418,-0.027420044,0.0075416565,-0.020843506,0.020751953,-0.014907837,0.05960083,0.047668457,-0.0031661987,0.025741577,0.04067993,0.037261963,0.004508972,-0.0014476776,-0.018066406,0.0034561157,0.00031638145,0.020980835,-0.0026874542,0.03967285,-0.023635864,0.031585693,0.014312744,0.026412964,-0.029953003,0.045684814,0.070373535,0.020370483,-0.011116028,0.029525757,0.002664566,-0.009353638,-0.013755798,-0.025817871,0.055786133,0.011665344,0.05529785,0.055023193,0.014556885,-0.011940002,0.028686523,-0.026123047,-0.034576416,0.07043457,0.025497437,-0.014846802,-0.01197052,-0.015426636,0.005279541,-0.048919678,-0.030303955,0.018737793,-0.008476257,0.01725769,-0.004135132,-0.0036182404,-0.008369446,0.007904053,0.03173828,0.008453369,-0.0146484375,0.02619934,0.024353027,0.0019264221,0.018554688,-0.0012636185,0.026062012,-0.03567505,-0.015571594,0.012283325,0.01386261,-0.006374359,-0.010055542,0.023330688,0.0064964294,0.053100586,0.04272461,-0.019943237,0.014450073,0.038513184,0.016952515,-0.0023326874,0.057159424,0.03152466,0.017486572,0.043304443,0.03427124,0.024597168,-0.036102295,0.015686035,-0.0002667904,0.0048065186,-0.0005168915,-0.004142761,0.0047912598,-0.021255493,0.02671814,0.008369446,-0.009880066,0.026504517,0.018920898,-0.0017929077,0.0024280548,-0.006965637,0.011726379,-0.021026611,-0.00010019541,0.016036987,-0.01852417,0.027862549,-0.0006933212,0.025146484,-0.026824951,0.02720642,0.0021247864,-0.02810669,-0.0056037903,0.014274597,-0.039093018,0.0035057068,-0.002729416,0.0017728806,-0.0501709,0.0074691772,0.027786255,-0.013656616,0.035217285,0.0141067505,0.002500534,0.0031223297,0.02104187,0.009124756,-0.003900528,-0.011772156,-0.018981934,0.041290283,0.037841797,-0.00045609474,0.019165039,-0.02166748,-0.007820129,0.010749817,0.0018787384,0.0013952255,-0.013801575,-0.015411377,-0.030700684,0.004753113,0.037384033,0.020050049,0.037261963,-0.009017944,-0.018753052,0.011520386,0.036346436,0.0026187897,-0.005683899,-0.012664795,0.026824951,-0.017730713,0.04711914,0.039367676,0.007381439,0.028182983,-0.013961792,-0.019424438,0.0072898865,-0.0012750626,0.02684021,-0.022964478,0.009399414,-0.0010929108,0.024887085,-0.023498535,-0.044067383,0.006149292,-0.01008606,-0.010276794,-0.030715942,0.0067329407,0.006702423,0.024353027,0.035308838,0.014167786,-0.033843994,0.0647583,-0.014160156,0.045318604,-0.0064430237,-0.008598328,0.053985596,0.028259277,0.041870117,0.015670776,0.019424438,-0.033813477,0.022644043,0.03704834,0.022415161,0.0076789856,0.0026226044,-0.030563354,0.037597656,-0.00548172,0.024978638,-0.01763916,0.003396988,0.015991211,-0.002960205,-0.0007715225,0.006259918,-0.008483887,0.0056991577,0.046875,-0.03274536,-0.0062332153,-0.020477295,-0.017105103,0.03186035,-0.011650085,0.0035495758,0.0034160614,-0.024215698,0.0074539185,-0.021011353,-0.024337769,0.008506775,0.029632568,-0.027816772,-0.027313232,-0.009590149,0.01751709,-0.02571106,0.026428223,0.025543213,0.003030777,0.0055656433,0.043884277,-0.0061035156,0.021469116,-0.013259888,0.020065308,0.031402588,0.0069732666,-0.022323608,0.0018253326,0.01637268,-0.0116119385,0.008834839,0.039367676,-0.018112183,0.007499695,0.008850098,-0.013389587,0.003112793,0.0028076172,-0.0058670044,-0.0023345947,-0.00843811,-0.02168274,-0.008331299,0.004447937,0.004573822,0.0093688965,-0.004512787,-0.009346008,0.011917114,0.035003662,0.02684021,-0.035705566,-0.0057754517,0.01398468,0.014144897,-0.020965576,-0.010734558,0.0048828125,-0.030349731,0.017852783,0.016540527,0.0077323914,0.008338928,-0.022583008,0.012069702,0.029846191,0.01914978,0.0184021,0.0053596497,-0.0013465881,0.028182983,-0.010154724,-0.0053596497,-0.0034694672,-0.015106201,0.01373291,0.018569946,-0.0146484375,-0.029586792,0.033111572,0.0033054352,0.019439697,0.011047363,-0.019134521,0.020050049,-0.009376526,-0.007888794,0.0023345947,0.010246277,-0.013534546,-0.014846802,-0.012054443,0.030426025,0.0670166,-0.02670288,-0.007675171,0.019104004,0.009933472,0.020446777,0.038391113,0.009498596,0.037231445,0.02015686,-0.026824951,-0.013877869,0.01626587,-0.0033416748,-0.028045654,0.01689148,-0.013542175,-0.029586792,0.0076675415,0.0051345825,-0.00035500526,-0.021575928,-0.017303467,-0.009002686,-0.010253906,0.018753052,-0.018554688,0.011558533,-0.020645142,-0.0023441315,0.01146698,-0.011520386,-0.044281006,-0.025024414,0.0018491745,-0.009185791,-0.05493164,0.014328003,-0.031204224,0.0063552856,-0.015045166,0.0010261536,-0.008514404,0.036224365,-0.0061912537,-0.008628845,0.011367798,0.030303955,0.017028809,0.010231018,0.03479004,-0.017837524,-0.039245605,-0.021102905,-0.006126404,-0.0017433167,0.02015686,-0.00087976456,0.033477783,0.017868042,-0.009262085,-0.0017642975,-0.015350342,-0.001490593,-0.010047913,-0.020828247,-0.021392822,0.025634766,0.016571045,-0.006866455,-0.0107421875,0.046051025,-0.012878418,-0.01979065,0.016235352,0.04788208,-0.0020771027,0.03942871,-0.015823364,-0.0060272217,-0.008125305,-0.0009918213,-0.0149383545,0.010322571,0.008605957,-0.000998497,-0.00075674057,0.0038166046,0.025390625,-0.012687683,-0.016174316,0.022491455,0.0031795502,-0.016342163,0.037750244,0.0037345886,0.00072717667,-0.008735657,-0.011268616,0.008834839,0.038970947,0.016326904,0.012008667,-0.0062408447,0.011550903,-0.020309448,0.015357971,0.020065308,-0.021240234,-0.04269409,-0.01499939,-0.030960083,0.021148682,0.0046539307,0.01725769,-0.009735107,0.012863159,-0.02482605,-0.020324707,-0.026290894,0.032104492,0.008934021,-0.007858276,-0.012001038,0.009010315,0.015625,-0.031799316,-0.0053138733,-0.039367676,-0.034942627,0.00283432,-0.023284912,0.017562866,0.009117126,-0.00223732,0.0025520325,-0.0033245087,-0.00248909,0.0046920776,0.024047852,-0.01979065,-0.0012598038,0.026321411,0.0053634644,-0.026046753,0.018707275,-0.0028648376,0.0012569427,0.017929077,-0.007881165,0.009300232,-0.015556335,0.033569336,-0.0039634705,0.0007510185,0.028335571,0.0012159348,0.0041999817,-0.03326416,0.010444641,0.003862381,-0.0013246536,0.042541504,-0.030136108,-0.018249512,0.011169434,-0.025619507,-0.030670166,0.0015077591,0.009094238,0.0390625,-0.017440796,0.04208374,-0.013259888,-0.005088806,0.021316528,0.009567261,-0.015823364,-0.0075950623,0.03463745,0.0036258698,0.008483887,0.0000743866,-0.010322571,-0.027755737,-0.011917114,0.01890564,-0.006866455,-0.016494751,0.01751709,0.007270813,0.04736328,0.0018787384,0.030273438,0.018051147,0.010147095,0.013160706,0.002986908,0.043395996,0.010253906,-0.022735596,0.013214111,-0.00630188,-0.022735596,-0.0074768066,-0.009895325,0.008361816,-0.042663574,0.010414124,-0.00039196014,0.030166626,-0.026657104,0.021408081,-0.023910522,-0.015960693,-0.044281006,-0.006793976,-0.031555176,0.016662598,0.037109375,0.0026893616,0.02293396,0.011871338,-0.03314209,0.009353638,0.037109375,0.0052948,-0.019500732,-0.023529053,0.006855011,0.009933472,0.009780884,0.011009216,-0.018554688,-0.018432617,-0.0003926754,-0.0020198822,0.012962341,-0.0018920898,0.014755249,0.009559631,-0.010215759,-0.0057678223,0.03427124,-0.012199402,-0.0030403137,0.0033416748,0.009048462,0.041534424,0.029708862,-0.0072021484,0.021942139,0.019378662,-0.029876709,0.04675293,-0.010437012,0.029052734,-0.025314331,0.0027008057,-0.035003662,-0.019439697,0.0021896362,-0.00016498566],"createdAt":"2026-04-18T18:40:55.192Z","updatedAt":"2026-04-22T12:03:25.501Z","lastSeenAt":"2026-04-22T12:03:25.501Z","tsv":"'/api/v1/accounts/128':56,177 '/docs':215 '/pricing':216 '/readme':217 '/request':13,28,167 '0.02':12,27,87,166 '000':82 '0x8335':72 '1':209 '20':81 '2913':73 '402':206 '6':92 'Base network API' 'USDC micropayment API' 'accept':63 'access':7,22,42,61,185 'across':124 'actual':233 'advertis':122 'ai':134 'amount':79 'analysi':138 'analyt':128 'api':6,21,40,60,95,184 'attach':106 'base':9,24,50,75,83 'base-network' 'beyond':182 'broader':119 'call':4,19 'caller':104 'categori':126 'challeng':204 'classif':141 'collect':34 'commit':101 'connect':224 'contain':221 'content':230 'contract':71 'convers':158 'cover':174 'crawl':191 'crypto-paid endpoint' 'data':127,131 'decim':93 'document':188,213 'embed':142 'endpoint':41,54,123,178,194,238 'equal':86 'estim':152 'exact':180 'exchang':147 'export':132 'feed':146 'financ':143 'form':202 'four':125 'function':181 'gas':151 'generat':159 'geocod':156 'header':111 'host':32 'howev':170 'http':205 'infrastructur':154 'insight':133 'key':96 'label':58 'learn':136 'limit':98 'list':162,173 'live':196 'lowpaymentfee' 'lowpaymentfee.com':31,120 'machin':135 'materi':192 'maximum':78 'metric':129 'network':51 'no-api-key' 'page':214 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':46,66,110,116 'per':3,18,38,88 'platform':121 'point':169 'post':64 'post-endpoint' 'premium':5,20,59,183 'premium API access' 'price':145,168 'prompt':226 'proof':117 'protocol':47,212 'quot':150 'rate':97,148 'report':130 'request':39,65,89 'request/response':234 'requir':103 'resolv':219 'return':198 'schema':235 'sentiment':137 'settl':68 'simpli':105 'specif':53,172 'substant':229 'summar':140 'text':139 'token':149 'unit':84 'unknown':240 'upfront':100 'usdc':15,30,70,90 'usdc-settlement' 'use':91 'util':155 'valid':114,157 'version':208 'via':10,25,43 'wallet':225 'web3':144 'well':201 'well-form':200 'whose':179 'x':109 'x-payment':108 'x402':11,26,45,115,203 'x402 API' 'x402-payment'","prices":[{"id":"1fc13ac5-1246-4c55-a148-8dcce684b588","listingId":"e4e12aaa-d734-48d8-ae67-a6924b0f5353","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/128","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:55.192Z"}],"sources":[{"listingId":"e4e12aaa-d734-48d8-ae67-a6924b0f5353","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/128","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:55.192Z","lastSeenAt":"2026-04-22T12:03:25.501Z"}],"details":{"listingId":"e4e12aaa-d734-48d8-ae67-a6924b0f5353","quickStartSnippet":"# The endpoint returns 402 with an x402 challenge.\n# Attach a valid X-PAYMENT header to authorize.\ncurl -X POST https://lowpaymentfee.com/api/v1/accounts/128 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 version 1 challenge, maxAmountRequired 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/128"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/128"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without creating an account or obtaining API keys","Making one-off paid API calls settled instantly in USDC on Base","Agent-driven workflows that need permissionless, pay-as-you-go API access"],"bestFor":["Developers who want zero-signup, pay-per-use API access","AI agents with x402-compatible wallets on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet","High-volume consumers who would benefit from bulk pricing or subscriptions"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.727Z"},"updatedAt":"2026-04-22T12:03:25.501Z"}}