{"id":"2a965c80-94ed-43f9-92dc-7ddabe1d55b9","shortId":"9rqDTQ","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, no rate limits, and no commitments required. The x402 protocol handles payment inline: callers attach an X-PAYMENT header with a signed USDC payment, and the server fulfills the request upon verification.\n\nThe specific endpoint at `/api/v1/charges/361` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base. The platform advertises categories including 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 (geocoding, validation, conversion, generation).\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. It is unclear what this specific `/api/v1/charges/361` endpoint actually returns or what input it expects beyond a POST request with JSON content type.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","validation"],"categories":["api-platform","ai","finance","data"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No API documentation available — /docs, /api, /pricing, /README all show only 'Connect wallet'","No OpenAPI or schema definition for any endpoint","The specific purpose of /api/v1/charges/361 ('Premium API Access') is undefined — unclear what data or service it provides","No request body schema or response examples available anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/361","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/charges/361","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 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a landing page listing, no request/response examples, and no clarity on what this specific charges/361 endpoint actually does. The docs pages are all empty wallet-connect stubs.","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":"2026-04-19T03:52:19.678Z","embedding":[-0.031341553,-0.03414917,0.03829956,0.016311646,0.025604248,-0.019851685,-0.019607544,0.020477295,0.07019043,-0.056854248,0.029129028,-0.044677734,-0.039489746,-0.030212402,-0.01776123,0.009468079,-0.010040283,0.008659363,-0.03237915,0.03652954,0.025482178,-0.0154418945,-0.017944336,0.020614624,-0.0022792816,-0.02027893,-0.008224487,-0.005088806,-0.023147583,-0.040496826,0.023910522,-0.023422241,-0.013031006,-0.0015029907,-0.007621765,-0.011444092,-0.015655518,0.036712646,0.02407837,0.0049324036,0.0017652512,-0.066589355,0.009559631,-0.018936157,-0.062438965,-0.017028809,0.013282776,-0.017364502,0.009689331,-0.0050811768,-0.033691406,0.00091838837,-0.014343262,0.010902405,0.0055351257,0.019195557,-0.0017127991,-0.004623413,0.008399963,0.012794495,-0.0037326813,-0.067871094,-0.013916016,-0.0006804466,0.00035500526,0.051727295,-0.0036773682,0.047088623,-0.0021686554,0.066833496,0.044433594,0.044677734,0.03744507,0.004360199,0.009750366,-0.011703491,-0.0026187897,0.043121338,-0.016830444,-0.024169922,-0.022537231,-0.0077285767,-0.046081543,-0.009925842,-0.016448975,-0.048065186,-0.023391724,0.02609253,-0.03805542,0.02558899,-0.07824707,0.0040359497,-0.019210815,-0.003622055,0.008018494,-0.005001068,-0.005138397,0.02368164,-0.016525269,0.011566162,-0.005367279,-0.038513184,0.013938904,0.016601562,0.03591919,0.04840088,0.028305054,0.02671814,-0.0049819946,-0.0050811768,-0.02784729,0.0140686035,-0.022567749,-0.023925781,0.0051116943,0.0034980774,-0.017578125,0.020080566,-0.03982544,0.012748718,-0.049346924,0.054595947,0.021972656,0.01537323,0.009963989,-0.050964355,-0.014541626,0.0090789795,-0.03933716,-0.013259888,0.024307251,0.012908936,0.018707275,-0.03164673,-0.028381348,0.0053710938,-0.017486572,-0.008148193,-0.054779053,-0.032073975,0.044036865,-0.023590088,0.023757935,0.047851562,-0.099609375,-0.01133728,-0.04196167,0.0073890686,-0.03201294,-0.009887695,0.0018472672,0.03945923,-0.018844604,-0.020263672,-0.019180298,-0.026626587,-0.013328552,0.03173828,-0.008956909,0.038024902,-0.016036987,0.0262146,0.00957489,-0.010253906,0.009918213,0.01939392,-0.0065956116,-0.07531738,-0.073913574,-0.02532959,-0.020080566,-0.02949524,-0.02420044,0.005393982,-0.00061416626,-0.07342529,-0.01474762,-0.017791748,0.0011463165,-0.03878784,-0.0048179626,-0.024658203,0.014282227,-0.0076560974,-0.06365967,-0.0126571655,-0.02268982,0.06097412,0.025238037,0.029205322,0.016693115,-0.00920105,0.057647705,0.025985718,-0.0151901245,-0.014503479,0.025619507,-0.017150879,0.032592773,-0.008544922,0.020004272,-0.021972656,0.041503906,0.07019043,0.009033203,-0.030212402,-0.007843018,-0.059417725,-0.059326172,-0.045013428,0.016021729,0.0020599365,-0.00969696,0.045288086,-0.03967285,-0.035705566,-0.0021877289,0.015899658,0.00818634,0.052490234,0.021652222,-0.00774765,0.035186768,0.01461792,-0.05456543,0.043151855,0.02609253,0.0061302185,-0.015556335,-0.034240723,0.028900146,0.024612427,-0.04269409,0.011680603,-0.02230835,0.01689148,0.0017738342,0.012283325,0.019439697,-0.010696411,-0.02217102,-0.01751709,-0.013145447,0.023483276,0.014816284,-0.030334473,-0.039215088,-0.081604004,0.05368042,0.025161743,0.04220581,0.0021095276,0.014305115,-0.019241333,-0.011764526,-0.07171631,0.056030273,0.0770874,0.0029029846,-0.021469116,0.02571106,-0.010787964,-0.029205322,0.0075187683,-0.014854431,-0.03262329,-0.022735596,0.020050049,-0.04675293,-0.011207581,0.026992798,0.017501831,0.0602417,-0.017120361,-0.05935669,-0.024307251,-0.004184723,0.00031518936,-0.026519775,-0.000014066696,-0.010345459,0.028564453,0.018310547,0.0064048767,0.010322571,0.008163452,0.011238098,-0.0082473755,0.0010700226,-0.0028953552,-0.020385742,0.008132935,-0.0019216537,-0.05102539,0.005622864,0.0024967194,0.072509766,-0.044067383,0.04586792,-0.002149582,0.012756348,0.047668457,-0.0129776,-0.052886963,0.0069122314,0.02670288,0.01979065,0.05706787,0.026031494,-0.033294678,-0.018341064,0.07800293,-0.0060310364,0.0027427673,0.004699707,0.00207901,0.039093018,-0.0033893585,-0.05899048,-0.049041748,-0.009712219,-0.028839111,0.03741455,-0.03189087,0.019424438,-0.012924194,0.010787964,-0.013122559,-0.0013141632,-0.028564453,0.009819031,-0.012794495,0.016281128,-0.025222778,-0.026565552,0.010520935,0.006038666,-0.0206604,0.0044403076,0.034484863,0.025680542,-0.007217407,-0.029449463,-0.03173828,-0.011299133,-0.017196655,0.011413574,0.020599365,0.023849487,0.046569824,-0.036712646,0.0025939941,0.024932861,0.008216858,0.03466797,0.000043272972,-0.017120361,-0.06640625,-0.050476074,-0.037139893,-0.04067993,0.02394104,0.029571533,-0.0012483597,0.049835205,0.0046310425,-0.023025513,-0.02609253,0.025024414,-0.042785645,-0.009231567,0.036193848,-0.021942139,-0.04260254,0.004142761,-0.006767273,-0.002620697,0.031829834,0.012329102,0.0211792,0.056610107,0.04055786,0.0064468384,0.020080566,0.011528015,0.02720642,0.014785767,-0.029052734,-0.021331787,-0.014465332,0.03366089,-0.026138306,-0.022415161,-0.062408447,0.062927246,0.033325195,0.09283447,0.022201538,0.006252289,0.031982422,-0.021621704,0.013000488,-0.03012085,-0.024154663,-0.021697998,-0.042785645,0.03387451,-0.018066406,-0.019012451,-0.03225708,0.04647827,-0.004802704,0.01374054,-0.032928467,0.049102783,-0.01838684,-0.013786316,0.025924683,0.016586304,0.06378174,0.06958008,-0.054779053,0.022491455,0.026016235,-0.029815674,0.00039839745,0.042755127,-0.01285553,0.001996994,-0.06665039,-0.018615723,-0.0016517639,-0.0066871643,-0.05758667,0.0036964417,0.007217407,0.022216797,0.022262573,0.0006990433,-0.018722534,-0.0032463074,-0.022598267,-0.05206299,-0.0018825531,-0.046051025,0.005264282,0.035888672,-0.021759033,-0.00217247,-0.0060310364,-0.0032215118,-0.01007843,0.014343262,0.028060913,-0.0062561035,-0.057861328,0.036254883,0.0023670197,0.004096985,0.013328552,0.043914795,0.036743164,0.031555176,0.04272461,0.010467529,-0.017120361,-0.06518555,0.026916504,-0.042663574,0.008979797,0.021652222,-0.023864746,0.0005187988,-0.004623413,-0.027297974,-0.029632568,0.011123657,-0.020996094,0.0026302338,0.015129089,-0.024978638,-0.03262329,-0.052856445,-0.019348145,-0.008728027,0.072021484,0.015258789,0.0016317368,-0.053253174,-0.009513855,0.023284912,0.010177612,0.029846191,-0.014564514,-0.012107849,-0.0036087036,-0.04055786,-0.0009441376,-0.024795532,0.02394104,-0.01524353,0.005050659,0.027282715,0.008354187,0.02293396,-0.0001693964,0.009246826,0.040649414,-0.027114868,-0.009437561,-0.018417358,0.03842163,0.013427734,-0.0066223145,-0.049316406,0.041381836,0.013053894,0.02507019,-0.039245605,0.0013685226,-0.010101318,0.008544922,0.019241333,-0.013847351,-0.0019779205,-0.0076942444,-0.048828125,-0.061767578,0.0309906,-0.017150879,0.02104187,0.024536133,0.0044059753,0.036254883,-0.023269653,0.005138397,0.02015686,-0.022857666,-0.0061569214,-0.0075569153,-0.029937744,-0.012504578,-0.016113281,-0.029937744,0.028945923,-0.0146865845,0.018035889,-0.0061035156,-0.016403198,0.022659302,0.010025024,0.0013713837,0.021911621,-0.008132935,0.026031494,0.048095703,0.007419586,-0.04837036,0.028793335,-0.0069770813,0.0070762634,-0.012199402,0.047698975,0.026809692,-0.011962891,-0.016082764,-0.014801025,-0.018295288,-0.02178955,0.007347107,0.010971069,0.011924744,-0.0062332153,-0.041229248,0.013145447,0.004306793,-0.032958984,-0.013160706,0.010055542,0.018356323,-0.037506104,0.01864624,0.029022217,0.049957275,-0.019882202,0.002243042,0.015151978,0.0345459,0.03527832,0.014007568,-0.002439499,0.018356323,-0.0068511963,0.0118255615,-0.011352539,-0.006465912,0.017791748,-0.006729126,0.017410278,0.020736694,0.007369995,-0.017532349,-0.018981934,0.01637268,-0.013153076,-0.028503418,0.031143188,0.017791748,0.013664246,-0.024749756,0.018585205,0.015327454,-0.025024414,-0.015388489,0.0046195984,0.040649414,-0.008926392,-0.0027198792,0.020751953,0.007217407,0.03189087,-0.05706787,-0.0027637482,0.00793457,0.0116119385,-0.016220093,-0.050872803,-0.036254883,0.013847351,0.043762207,-0.00043439865,0.027145386,0.03604126,0.01348114,0.010910034,0.019454956,-0.0035705566,-0.021102905,-0.008972168,-0.0491333,-0.019577026,-0.022964478,0.00497818,-0.025756836,0.014694214,0.0028858185,-0.04525757,0.006275177,-0.016952515,-0.00038409233,-0.0022888184,0.0068855286,0.035186768,0.0035762787,0.012229919,-0.020324707,-0.030044556,-0.00027036667,0.0021820068,0.02204895,-0.047943115,0.0029354095,-0.009010315,-0.011108398,0.004272461,0.012687683,0.023773193,0.029205322,0.013648987,0.03466797,-0.036987305,0.049957275,-0.033843994,0.01374054,0.0031738281,-0.042541504,-0.011817932,-0.022033691,-0.009727478,0.029266357,-0.027359009,-0.0054359436,-0.015960693,-0.038238525,-0.0051612854,-0.057159424,0.01776123,0.037384033,0.037750244,-0.022369385,0.0012483597,0.0015707016,0.000749588,-0.012054443,0.00774765,-0.023468018,0.023757935,0.020050049,0.011070251,-0.030410767,-0.022964478,-0.019546509,0.007843018,-0.049346924,-0.055389404,-0.008865356,0.002248764,-0.017654419,-0.012077332,-0.019546509,-0.031707764,-0.0009994507,-0.0423584,0.010696411,0.008888245,0.018203735,0.005859375,-0.021850586,-0.0023288727,0.0065841675,-0.018447876,0.033843994,-0.00077962875,-0.018829346,-0.038635254,-0.006099701,0.02293396,0.017196655,-0.0057411194,-0.017349243,-0.013153076,-0.018356323,-0.058532715,0.0040283203,-0.0077667236,-0.0043258667,-0.009223938,0.010795593,-0.05847168,-0.0020885468,-0.025054932,-0.0053710938,0.024642944,0.012252808,0.009422302,-0.005302429,0.017349243,-0.0012207031,-0.012992859,-0.029632568,0.018600464,0.0107040405,0.008842468,0.029022217,0.037841797,-0.001036644,-0.023788452,0.00033521652,0.008346558,0.012199402,-0.020904541,0.007217407,-0.018463135,0.012207031,-0.011016846,-0.004878998,-0.035339355,-0.012557983,0.082214355,-0.0026111603,-0.017227173,-0.012611389,-0.025772095,0.008415222,0.029159546,-0.049316406,-0.0055999756,-0.030410767,0.013916016,-0.032592773,0.014968872,-0.0026226044,0.028320312,-0.01864624,-0.058044434,-0.012062073,-0.0055503845,-0.019195557,-0.06878662,-0.030303955,-0.076171875,0.010604858,-0.0047454834,-0.017578125,-0.0032901764,0.009063721,-0.030181885,-0.07849121,0.0044174194,0.056121826,-0.0010442734,0.025421143,-0.008132935,0.021011353,0.024902344,-0.029083252,0.00028443336,0.025680542,-0.022384644,-0.012916565,-0.015655518,0.021728516,-0.01777649,-0.009994507,0.00674057,0.007926941,0.009918213,-0.00793457,0.017456055,-0.008644104,0.018325806,-0.009597778,0.008720398,-0.014762878,-0.005077362,0.03552246,-0.046875,0.028900146,0.017028809,-0.014762878,0.003168106,0.028686523,0.04446411,-0.03387451,-0.023239136,0.01914978,0.0038204193,0.032440186,-0.02960205,0.048095703,0.01612854,-0.013519287,-0.0009045601,-0.011764526,-0.014816284,-0.01776123,-0.0395813,0.022201538,0.0061912537,0.009819031,-0.010498047,0.0015659332,0.011039734,-0.004184723,0.0055122375,-0.0064849854,-0.00983429,-0.0053863525,0.0050697327,-0.0013141632,0.011772156,-0.0054779053,0.03164673,0.018661499,0.033111572,-0.0009756088,-0.014785767,-0.0040779114,0.034606934,-0.01574707,0.012458801,0.028564453,0.018798828,0.02619934,0.016281128,0.01576233,-0.04135132,-0.015075684,-0.019165039,-0.01638794,0.0039405823,-0.011779785,-0.0039405823,-0.0061454773,0.0055351257,-0.017166138,-0.03161621,-0.0034656525,-0.026626587,-0.019882202,0.002538681,-0.01146698,0.021484375,-0.0037078857,0.003080368,0.012825012,-0.007003784,0.046417236,-0.014419556,-0.00724411,0.02279663,0.027038574,0.016586304,-0.035247803,-0.012649536,-0.007461548,-0.004211426,0.0020771027,-0.027069092,0.014801025,0.042755127,-0.004699707,0.0079574585,-0.00818634,0.026550293,-0.0024261475,0.007144928,-0.010299683,0.011604309,0.0009384155,0.027618408,-0.04421997,0.029190063,0.019180298,-0.0041503906,-0.021560669,-0.015365601,-0.01461792,0.016708374,0.014564514,-0.003786087,0.0524292,0.0048065186,0.024673462,-0.017410278,-0.02154541,0.016220093,-0.029266357,-0.024871826,0.018173218,-0.004688263,0.0027542114,0.009384155,-0.023483276,0.028717041,-0.043426514,0.012107849,0.0023593903,0.011878967,0.00340271,-0.016403198,-0.0053215027,-0.013755798,-0.010185242,0.00983429,0.00021517277,0.039398193,0.015129089,0.031921387,0.045928955,0.017333984,0.0039138794,-0.03744507,-0.016113281,-0.006008148,-0.032287598,0.021469116,-0.008285522,0.05130005,0.0340271,0.015853882,0.038604736,0.0345459,0.04034424,0.006313324,0.010971069,-0.02519226,0.01083374,0.0039138794,0.03591919,-0.00623703,0.035339355,-0.022521973,0.027328491,0.0093307495,0.03768921,-0.028564453,0.02456665,0.06665039,0.014526367,-0.00868988,0.04034424,-0.0068130493,-0.01626587,-0.0074806213,-0.011421204,0.055389404,0.006832123,0.042419434,0.05014038,0.014564514,-0.004962921,0.022140503,-0.027252197,-0.02557373,0.06738281,0.034210205,-0.027908325,-0.01713562,0.004245758,0.015731812,-0.04763794,-0.017700195,0.024765015,-0.0075645447,0.010658264,-0.0062675476,-0.011802673,-0.01878357,0.0013656616,0.015670776,0.014472961,-0.01486969,0.02267456,0.029968262,0.0035152435,0.027755737,-0.006164551,0.022521973,-0.026916504,-0.02607727,0.0154953,0.01751709,-0.019927979,-0.006969452,0.026931763,0.0077667236,0.034973145,0.033966064,-0.021591187,0.007446289,0.02507019,0.016326904,-0.0007095337,0.05307007,0.047424316,0.013626099,0.033843994,0.03062439,0.03677368,-0.03878784,0.024765015,0.0066337585,0.011489868,-0.001042366,-0.003730774,0.0158844,-0.010559082,0.012130737,-0.002614975,-0.012687683,0.026535034,0.024032593,-0.01109314,-0.0031108856,-0.008972168,0.012039185,-0.01687622,-0.002374649,0.008003235,-0.016616821,0.02999878,0.011955261,0.028015137,-0.025390625,0.027389526,-0.008834839,-0.01927185,0.0022010803,0.023727417,-0.038482666,0.0010128021,-0.0035953522,-0.008560181,-0.04309082,0.006629944,0.021392822,-0.014228821,0.01939392,0.010658264,-0.00028800964,-0.0015716553,0.019958496,0.009880066,0.004257202,-0.011360168,-0.019760132,0.02178955,0.039886475,-0.009529114,0.0005173683,-0.03012085,-0.0017786026,0.0014400482,-0.0054779053,-0.0036182404,-0.0036773682,-0.026382446,-0.015670776,0.018966675,0.035980225,0.024658203,0.046417236,-0.020492554,-0.021118164,0.0015583038,0.02557373,-0.0014228821,0.007369995,-0.00058460236,0.015853882,-0.021240234,0.0446167,0.027435303,0.016815186,0.04055786,0.0012664795,-0.012008667,0.017333984,-0.020126343,0.02949524,-0.0154418945,0.00028324127,-0.008483887,0.020706177,-0.013648987,-0.027359009,0.0049858093,-0.020935059,-0.030227661,-0.02067566,0.01146698,0.0067214966,0.024810791,0.034057617,0.028503418,-0.020324707,0.05899048,-0.007835388,0.042022705,0.0026874542,-0.014045715,0.04699707,0.018234253,0.034332275,0.0154418945,0.005710602,-0.037078857,0.010513306,0.037475586,0.029205322,0.0063476562,0.015060425,-0.0051612854,0.03567505,-0.0063285828,0.027648926,-0.0031986237,-0.0016212463,0.011154175,-0.0036258698,-0.007068634,-0.0023937225,-0.0075302124,0.004348755,0.04949951,-0.01612854,-0.00422287,-0.033935547,-0.0070533752,0.02368164,-0.007621765,-0.0044021606,-0.010505676,-0.018249512,0.014251709,-0.030044556,-0.028213501,0.010848999,0.025848389,-0.061706543,-0.011039734,0.007270813,0.021697998,-0.0209198,0.036102295,0.026473999,-0.010375977,0.008041382,0.04473877,-0.0104599,0.024993896,-0.0065612793,0.028320312,0.031341553,0.0069236755,-0.02468872,-0.0025157928,0.0063285828,-0.00566864,0.017166138,0.03866577,-0.009521484,0.008659363,-0.011108398,-0.011795044,-0.004886627,0.0053253174,-0.018661499,0.012161255,-0.0064849854,-0.010421753,0.0077552795,0.009277344,0.0026855469,0.0075531006,-0.011558533,-0.020370483,0.0032691956,0.036010742,0.02243042,-0.03515625,-0.0014953613,0.00919342,-0.0007991791,-0.02746582,-0.01134491,-0.0036582947,-0.036315918,0.011222839,0.01979065,0.012496948,0.009025574,-0.019760132,-0.0022640228,0.028060913,0.004196167,0.02015686,0.0046539307,-0.0026550293,0.0154800415,-0.0075187683,-0.0072250366,-0.0003643036,-0.02029419,0.005054474,0.023406982,0.010246277,-0.023742676,0.029418945,0.008232117,0.02192688,-0.0011310577,-0.013954163,0.008232117,-0.00944519,-0.005279541,0.002790451,0.018508911,-0.014709473,-0.0105896,-0.0129470825,0.040283203,0.055603027,-0.009429932,-0.011062622,0.024307251,0.020492554,0.020111084,0.04360962,0.0051002502,0.04071045,0.01789856,-0.020263672,-0.020935059,0.021087646,-0.005970001,-0.033569336,0.015640259,-0.015388489,-0.007904053,0.019317627,0.015853882,-0.005531311,-0.0259552,-0.015113831,-0.014343262,-0.009651184,0.016036987,-0.007965088,0.020050049,-0.018676758,-0.010345459,0.010597229,-0.02746582,-0.053863525,-0.020080566,-0.0037879944,-0.010414124,-0.057678223,-0.0016756058,-0.03189087,0.008674622,-0.026748657,-0.0057373047,-0.021011353,0.0074272156,-0.01739502,-0.006462097,0.004940033,0.017547607,0.02670288,0.0043678284,0.016098022,-0.039215088,-0.022964478,-0.027801514,0.013320923,-0.012359619,0.01977539,0.01260376,0.030929565,0.026168823,-0.016235352,-0.0014343262,-0.0051116943,-0.004924774,-0.0104522705,-0.021102905,-0.024856567,0.025863647,0.019607544,-0.01197052,-0.012809753,0.03768921,-0.025024414,-0.0067100525,0.028930664,0.048065186,0.009963989,0.023849487,-0.01713562,0.009819031,-0.024597168,-0.0053863525,-0.020401001,0.005256653,0.013587952,0.0029621124,-0.006122589,0.0059013367,0.013648987,-0.012237549,-0.014602661,0.036315918,0.022247314,-0.02017212,0.038848877,0.015823364,0.008560181,-0.0068511963,-0.008987427,0.028167725,0.050231934,0.008293152,0.017715454,0.0023097992,0.0053138733,-0.010353088,0.017578125,0.023483276,-0.02180481,-0.05532837,-0.020843506,-0.027908325,0.016815186,0.0034389496,0.014289856,-0.0035591125,0.018127441,-0.018341064,-0.024047852,-0.014923096,0.025497437,0.007106781,-0.012290955,-0.009727478,0.018554688,0.018051147,-0.032165527,-0.00024700165,-0.04071045,-0.02658081,-0.011833191,-0.017837524,0.031341553,0.007801056,-0.008575439,-0.003944397,-0.0024681091,-0.0018939972,0.0015888214,0.029418945,-0.015670776,-0.00069236755,0.028503418,0.0262146,-0.01939392,0.021530151,-0.0118255615,-0.005214691,0.010971069,-0.013793945,0.017074585,-0.02027893,0.037475586,-0.0046310425,0.00066041946,0.0284729,-0.010894775,0.020217896,-0.022369385,-0.00617218,-0.005176544,-0.008377075,0.042114258,-0.024307251,-0.016174316,0.010543823,-0.013389587,-0.02331543,0.003648758,0.019973755,0.03930664,-0.007408142,0.05065918,-0.023666382,-0.0055885315,0.009490967,0.0039711,-0.023406982,0.008224487,0.027328491,0.008979797,-0.0049438477,-0.0063705444,-0.014656067,-0.037231445,-0.010467529,0.021362305,-0.0039482117,-0.015129089,0.023910522,0.013786316,0.0496521,-0.0010604858,0.024414062,0.015052795,0.0010442734,0.025756836,0.0041542053,0.061767578,-0.0041236877,-0.029678345,0.008972168,-0.0034980774,-0.020645142,-0.0027809143,-0.006439209,-0.006793976,-0.04586792,0.014694214,-0.009170532,0.021331787,-0.01776123,0.013130188,-0.024856567,-0.0015640259,-0.04031372,-0.011634827,-0.03878784,0.010406494,0.03643799,-0.0031871796,0.028137207,0.0013227463,-0.018737793,0.02861023,0.04537964,-0.006088257,-0.030334473,-0.014251709,0.015792847,-0.0038871765,0.008323669,0.005680084,-0.009284973,-0.015220642,0.001698494,-0.022018433,0.0109939575,-0.013305664,0.019088745,0.0077590942,0.0012636185,-0.0074272156,0.025375366,0.004009247,-0.0053253174,0.012374878,0.009254456,0.037200928,0.036254883,-0.017303467,0.028900146,0.0096588135,-0.048309326,0.057281494,-0.00027155876,0.04046631,-0.017990112,0.005077362,-0.033203125,-0.029418945,-0.01399231,0.004371643],"createdAt":"2026-04-18T18:45:13.935Z","updatedAt":"2026-04-22T16:31:16.750Z","lastSeenAt":"2026-04-22T16:31:16.750Z","tsv":"'/api':183 '/api/v1/charges/361':110,220 '/docs':182 '/pricing':184 '/readme':186 '/request':13,28 '0.02':12,27,59,131 '000':126 '20':125 '402':120 '402 payment api' '6':136 'access':116 'across':45 'actual':222 'advertis':142 'ai':152 'ai-inference' 'ai/ml':48 'analysi':156 'analyt':47,146 'api':5,20,37,71,115 'attach':87 'base':8,23,67,127,139 'base network api' 'beyond':229 'call':4,19 'caller':86 'categori':143 'challeng':121 'classif':159 'classification' 'commit':78 'connect':192 'content':198,235 'convers':175 'data':46,145,149 'data-analytics' 'decim':137 'detail':209 'document':177,210 'embed':160 'embeddings' 'enabl':36 'endpoint':44,55,108,213,221 'estim':170 'exampl':206 'exchang':165 'expect':228 'export':150 'extrem':179 'feed':164 'financ':161 'finance-data' 'finance/web3':50 'fulfil':101 'gas':169 'generat':176 'geocod':173 'geocoding' 'handl':83 'header':92 'includ':144 'infer':49 'infrastructur':52,172 'inlin':85 'input':226 'insight':151 'json':234 'key':72 'learn':154 'limit':75 'list':112 'low payment fee' 'lowpaymentfee.com':31 'machin':153 'metric':147 'micropayment api' 'network':9,24,68 'offer':40 'openapi':202 'page':187 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payabl':62 'payment':84,91,97 'per':3,18,60 'platform':6,21,38,141 'post':231 'premium':114 'price':57,163 'prompt':194 'protocol':82 'quot':168 'rate':74,166 'render':189 'report':148 'request':61,103,122,232 'request/response':205 'requir':79 'return':118,223 'schema':203 'sentiment':155 'sentiment-analysis' 'server':100 'sign':95 'sinc':133 'spars':180 'specif':107,219 'summar':158 'text':157 'text-summarization' 'token':167 'type':236 'unclear':216 'unit':128 'upon':104 'usd':132 'usdc':15,30,64,96,130,134 'usdc api' 'usdc-base' 'use':135 'util':53 'valid':174 'validation' 'varieti':42 'verif':105 'via':10,25 'wallet':193 'web3':162 'x':90 'x-payment':89 'x402':11,26,35,81 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"6ee5a3e4-92a0-4ad1-ad33-8194800b823a","listingId":"2a965c80-94ed-43f9-92dc-7ddabe1d55b9","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/charges/361","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:13.935Z"}],"sources":[{"listingId":"2a965c80-94ed-43f9-92dc-7ddabe1d55b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/361","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:13.935Z","lastSeenAt":"2026-04-22T16:31:16.750Z"}],"details":{"listingId":"2a965c80-94ed-43f9-92dc-7ddabe1d55b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/361 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/charges/361"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-call basis","Running data analytics queries and exporting data with per-request USDC micropayments","Using utility services like geocoding, validation, and conversion without subscriptions"],"bestFor":["Developers who want zero-commitment, pay-as-you-go API access","Agents and bots that can settle payments programmatically via x402 on Base","Users who prefer crypto-native micropayments over traditional API key subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:22.155Z"},"updatedAt":"2026-04-22T16:31:16.750Z"}}