{"id":"3dba7f9c-9e91-43d0-863b-ef474e5b593f","shortId":"kNXkWQ","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC, no API keys required.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC, no API keys required.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network. The x402 protocol means there are no API keys, no sign-ups, and no rate limits — callers simply attach an X-PAYMENT header with a valid payment proof to each request.\n\nThe specific endpoint at `/api/v1/products/31` is listed as \"Premium API Access\" and returns `application/json`. The x402 challenge confirms it accepts the `exact` payment scheme on Base, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The `maxAmountRequired` is 20000 base units, which at 6 decimals equals $0.02. The timeout is 300 seconds.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so the actual behavior, input schemas, and response formats for these endpoints are undocumented.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","data-analytics","ai-inference","finance-data","utility-services"],"categories":["api-marketplace","finance","llm","geo"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","no-auth API","crypto-paid API"],"warnings":["All documentation pages (/docs, /api, /pricing, /README) are empty — only showing 'Connect wallet'","No OpenAPI or schema available; input parameters and response format for /api/v1/products/31 are completely unknown","The endpoint name 'Premium API Access' is generic and does not describe actual functionality","No examples, error codes, or rate limit information documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/31","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/products/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no documentation of request/response formats, and all doc pages are empty stubs. The specific endpoint '/api/v1/products/31' has only a generic 'Premium API Access' label with no indication of what it actually returns.","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":"2026-04-18T22:31:32.878Z","embedding":[-0.010246277,-0.03692627,0.039031982,0.017181396,0.013519287,-0.030090332,-0.01637268,0.052764893,0.06945801,-0.052337646,0.033111572,-0.053741455,-0.028930664,-0.031341553,-0.016998291,0.020492554,-0.002067566,0.0070877075,-0.04736328,0.035461426,0.0071411133,-0.017120361,-0.030670166,0.028427124,0.0078125,-0.013595581,0.00017642975,0.011520386,-0.005088806,-0.043395996,0.030517578,-0.031677246,-0.011123657,0.024749756,-0.013298035,-0.010955811,0.0012817383,0.047668457,0.032043457,-0.015258789,-0.011856079,-0.0670166,0.0058670044,-0.019088745,-0.058441162,0.005596161,0.009811401,-0.021942139,-0.004486084,0.010017395,-0.035217285,-0.010284424,-0.011329651,0.0016241074,-0.0029354095,0.016555786,0.004753113,0.0051727295,0.006515503,0.0143966675,0.010726929,-0.06201172,-0.009635925,-0.00036621094,-0.00029158592,0.05569458,-0.0064849854,0.024902344,0.00472641,0.07281494,0.028930664,0.04840088,0.044677734,0.007095337,-0.0038166046,-0.0073051453,-0.00045251846,0.05517578,-0.00085783005,-0.024093628,-0.0036258698,-0.022491455,-0.035247803,0.0008430481,-0.015731812,-0.06536865,-0.021942139,0.020980835,-0.030426025,0.02619934,-0.06915283,-0.005607605,-0.022384644,-0.0067710876,-0.00092983246,-0.0036563873,-0.017303467,0.023406982,-0.0017061234,0.013900757,-0.006980896,-0.032165527,0.008041382,0.009590149,0.039215088,0.04840088,0.02671814,0.01713562,-0.0030059814,-0.0149002075,-0.031799316,0.013031006,-0.021011353,-0.009552002,0.014541626,0.0017881393,-0.016616821,0.024734497,-0.03137207,0.030334473,-0.057128906,0.049987793,0.012306213,0.010749817,0.0060920715,-0.03164673,-0.022781372,0.01979065,-0.01889038,-0.015350342,0.016647339,0.0126571655,0.01876831,-0.00844574,-0.03237915,0.01739502,-0.023635864,-0.011161804,-0.050689697,-0.028793335,0.034332275,-0.029769897,0.024719238,0.040374756,-0.08959961,-0.01473999,-0.04498291,0.008178711,-0.03668213,-0.010902405,0.012031555,0.017318726,-0.03225708,-0.02217102,-0.028717041,-0.027160645,-0.0107421875,0.04006958,0.0059394836,0.04119873,-0.011482239,0.021057129,0.013412476,-0.00459671,0.0158844,0.023529053,-0.007030487,-0.07678223,-0.0758667,-0.029846191,-0.009712219,-0.01638794,-0.013038635,0.007686615,0.0027179718,-0.079833984,-0.024368286,-0.0048980713,-0.0013170242,-0.049468994,-0.0005245209,-0.044952393,0.013885498,-0.018707275,-0.045166016,-0.016448975,-0.03289795,0.054504395,0.02947998,0.020812988,0.021469116,-0.018157959,0.061431885,0.027832031,-0.006603241,-0.030960083,0.017410278,-0.027450562,0.026062012,-0.008613586,0.022979736,-0.015113831,0.046813965,0.07293701,0.0068626404,-0.013938904,-0.0042037964,-0.053344727,-0.061706543,-0.032989502,0.022613525,0.003829956,-0.0132369995,0.027328491,-0.037475586,-0.017242432,0.0066452026,0.017028809,0.01727295,0.07397461,-0.0038795471,-0.009498596,0.025924683,0.024871826,-0.06213379,0.048339844,0.040649414,0.012008667,-0.013961792,-0.03881836,0.024597168,0.035186768,-0.025604248,0.018875122,-0.025802612,0.01586914,-0.0017757416,0.0011758804,0.0058784485,-0.02355957,-0.015533447,-0.033721924,-0.00868988,0.026809692,0.0016365051,-0.027038574,-0.041412354,-0.08026123,0.044036865,0.025604248,0.043548584,0.0027923584,0.013847351,-0.026351929,-0.009468079,-0.08648682,0.05987549,0.072387695,0.0014533997,-0.019927979,0.017913818,-0.018722534,-0.039398193,-0.0041160583,-0.00793457,-0.024429321,-0.0026474,0.031951904,-0.04208374,-0.004917145,0.038848877,0.020065308,0.04550171,-0.01940918,-0.038238525,-0.0137786865,-0.0074768066,0.0037155151,-0.036193848,0.0034389496,-0.0066452026,0.013290405,0.021850586,-0.004085541,0.017166138,-0.00248909,0.02003479,-0.008354187,-0.011772156,-0.009811401,-0.016448975,0.022079468,0.012046814,-0.055908203,0.017684937,-0.018157959,0.06707764,-0.046447754,0.03866577,-0.010848999,0.041015625,0.044647217,-0.008415222,-0.047821045,-0.0059776306,0.04437256,0.010925293,0.037200928,0.02357483,-0.025054932,-0.0025997162,0.08404541,-0.011352539,-0.009033203,0.0084991455,0.011177063,0.038085938,-0.00674057,-0.06112671,-0.035614014,-0.0034427643,-0.032562256,0.037353516,-0.023864746,0.035064697,-0.005683899,0.007835388,-0.018661499,-0.00497818,-0.041137695,0.010391235,-0.0031204224,0.008728027,-0.01386261,-0.024780273,0.006652832,0.02722168,-0.01953125,0.0076408386,0.02911377,0.019424438,-0.014732361,-0.040008545,-0.03225708,-0.003276825,-0.0043907166,0.021194458,0.022232056,0.022521973,0.052093506,-0.041778564,-0.0031642914,0.013427734,-0.010238647,0.039215088,0.0030384064,-0.00818634,-0.051818848,-0.057922363,-0.027694702,-0.045440674,0.0309906,0.03439331,-0.010124207,0.050048828,-0.0050086975,-0.016052246,-0.04626465,0.009765625,-0.040924072,0.0050811768,0.051452637,-0.018066406,-0.036132812,0.018157959,-0.009590149,-0.0055007935,0.0473938,0.0154800415,0.02645874,0.07324219,0.042907715,0.015716553,0.021652222,0.0152282715,0.028427124,0.011566162,-0.009361267,-0.02178955,-0.017425537,0.033843994,-0.039886475,-0.020568848,-0.061401367,0.059692383,0.030807495,0.08795166,0.020446777,0.013153076,0.044525146,-0.015167236,0.01638794,-0.011146545,-0.01121521,-0.032989502,-0.03491211,0.024551392,-0.0020771027,-0.0012493134,-0.016036987,0.039215088,-0.0026130676,0.015960693,-0.03353882,0.044403076,-0.002275467,-0.016464233,0.027832031,0.018569946,0.039031982,0.05392456,-0.04385376,0.013008118,0.02281189,-0.03189087,-0.0057373047,0.039733887,-0.014846802,-0.022521973,-0.056030273,-0.026382446,-0.01309967,0.00970459,-0.05303955,-0.0003592968,-0.017044067,0.011932373,0.038879395,-0.025650024,0.0009717941,-0.0082092285,-0.0025577545,-0.0513916,-0.0034294128,-0.04232788,-0.006477356,0.025100708,-0.026947021,-0.005657196,0.0020427704,-0.0028038025,-0.016448975,0.008964539,0.025802612,0.0014801025,-0.043640137,0.03704834,0.005332947,0.009895325,0.010902405,0.032440186,0.040618896,0.026809692,0.043670654,0.02243042,-0.012313843,-0.046447754,0.02645874,-0.031585693,0.0024604797,0.012138367,-0.023651123,-0.0036888123,-0.02734375,-0.028167725,-0.027114868,0.021316528,-0.018829346,0.018844604,0.03579712,-0.021850586,-0.026367188,-0.060821533,-0.029144287,-0.017745972,0.06652832,0.020980835,-0.0036296844,-0.058654785,-0.014305115,0.019363403,0.0036334991,0.03125,-0.014884949,-0.0014486313,-0.017745972,-0.02368164,-0.00340271,-0.020187378,0.02520752,-0.0017700195,-0.0006713867,0.020523071,0.0050315857,0.018615723,0.0008420944,0.01071167,0.022949219,-0.015213013,-0.0013084412,-0.011833191,0.023284912,0.01424408,0.0036792755,-0.042999268,0.05102539,-0.000119805336,0.03366089,-0.042510986,-0.0038757324,-0.000415802,0.0135269165,0.016845703,-0.00024104118,-0.0064353943,-0.012809753,-0.05029297,-0.076660156,0.03164673,-0.030715942,0.043945312,0.032287598,0.0037612915,0.030639648,-0.010726929,-0.005847931,0.010757446,-0.030090332,-0.010391235,-0.015716553,-0.029190063,-0.023162842,-0.008178711,-0.033416748,0.023361206,-0.012786865,0.021133423,-0.0059280396,-0.033935547,0.01776123,0.0036392212,-0.010726929,0.025024414,0.0056152344,0.024353027,0.048339844,0.0006284714,-0.04547119,0.0152282715,-0.009437561,0.0084991455,-0.002450943,0.03387451,0.03186035,-0.004611969,-0.0038280487,-0.0010967255,-0.010009766,-0.030853271,0.01386261,-0.00020253658,0.0012664795,-0.002336502,-0.026855469,0.011650085,0.0014677048,-0.027252197,-0.0357666,0.008155823,0.021713257,-0.037872314,0.013648987,0.024734497,0.044677734,-0.023086548,-0.0017900467,0.0015745163,0.025650024,0.02885437,0.016586304,-0.014083862,0.01701355,-0.01966858,0.010299683,-0.0036334991,-0.023849487,0.022750854,0.0059127808,0.012168884,0.027053833,0.0082473755,-0.021240234,-0.026397705,0.0056877136,-0.015899658,-0.031921387,0.030456543,0.013977051,0.034423828,-0.02935791,0.011062622,0.019454956,-0.014343262,-0.0107803345,-0.01763916,0.047454834,-0.003824234,-0.013465881,0.008506775,0.016159058,0.022903442,-0.057556152,0.0033893585,-0.0013656616,0.004398346,-0.021240234,-0.037139893,-0.037750244,0.0038108826,0.037017822,0.020904541,0.023880005,0.029556274,0.00012034178,0.012825012,0.021514893,0.0015707016,-0.011016846,-0.0154800415,-0.04928589,-0.023376465,-0.0007686615,0.0031795502,-0.031585693,0.011787415,-0.0068511963,-0.026000977,0.011940002,-0.0048294067,-0.002286911,-0.008354187,0.003074646,0.05569458,0.004184723,0.0178833,-0.013900757,-0.03253174,-0.008270264,0.010879517,0.0016727448,-0.04156494,0.011421204,-0.001701355,-0.00995636,0.0049095154,0.014083862,0.025817871,0.030715942,0.015022278,0.039276123,-0.050201416,0.037719727,-0.04095459,0.021499634,-0.010391235,-0.042388916,-0.014015198,-0.022766113,-0.010246277,0.05206299,-0.032165527,0.0009775162,-0.028533936,-0.035186768,-0.021347046,-0.05267334,0.013366699,0.036102295,0.044647217,-0.025787354,-0.0057678223,0.0060768127,0.0102005005,-0.025848389,-0.00083351135,-0.02116394,0.020858765,0.020248413,-0.01071167,-0.03353882,-0.02722168,-0.015838623,0.0063209534,-0.044281006,-0.05923462,-0.01826477,-0.010406494,-0.009918213,-0.007774353,-0.017440796,-0.040618896,-0.007423401,-0.030197144,0.019165039,0.003200531,0.016448975,0.020980835,-0.027267456,-0.0062561035,0.024414062,-0.020629883,0.03793335,-0.0020275116,0.00086069107,-0.04348755,0.014976501,0.017410278,0.02758789,-0.0067863464,-0.024810791,-0.006252289,-0.023040771,-0.061767578,-0.0039482117,-0.007171631,-0.0101623535,-0.0011444092,-0.004924774,-0.045318604,-0.009208679,-0.024627686,-0.0021133423,0.015640259,0.02470398,0.004589081,0.011787415,0.004562378,-0.010101318,0.0018110275,-0.02519226,0.023620605,0.010955811,0.0023899078,0.030090332,0.04168701,0.002796173,-0.015899658,0.0055160522,0.008102417,0.026229858,-0.023544312,0.002254486,-0.027542114,0.025009155,-0.0060768127,-0.0064468384,-0.036315918,0.00061035156,0.075683594,0.0010061264,-0.0012407303,-0.0056266785,-0.01399231,0.019332886,0.037506104,-0.044830322,-0.014251709,-0.026687622,0.018341064,-0.016723633,0.014625549,0.001405716,0.018630981,-0.007095337,-0.042633057,-0.01663208,-0.014152527,-0.0035972595,-0.06222534,-0.032928467,-0.07122803,0.013916016,-0.028961182,-0.018661499,-0.0010709763,0.006942749,-0.024887085,-0.07373047,0.0030174255,0.053100586,-0.0037708282,0.03062439,-0.0068130493,0.0132751465,0.035308838,-0.04159546,-0.0017623901,0.031036377,-0.025726318,-0.026947021,-0.024108887,0.015335083,-0.012901306,0.0010519028,0.0050315857,0.016464233,0.01727295,-0.006454468,0.009719849,-0.012229919,0.014884949,-0.0055885315,0.020187378,-0.016433716,-0.010520935,0.035247803,-0.044647217,0.021408081,0.009124756,-0.009674072,0.00667572,0.033966064,0.04486084,-0.036499023,-0.013427734,0.028884888,0.019577026,0.031677246,-0.023513794,0.048919678,-0.0060043335,-0.020080566,0.0047187805,-0.029373169,-0.02053833,-0.022918701,-0.032196045,0.021331787,-0.0032367706,0.01737976,-0.02067566,0.005455017,0.024246216,0.009361267,0.0017471313,-0.011474609,-0.020431519,-0.022323608,0.0068969727,-0.0066184998,-0.005355835,0.010513306,0.027633667,0.024887085,0.030563354,0.010688782,-0.008079529,-0.0027427673,0.036743164,-0.008758545,-0.008575439,0.024520874,-0.00077056885,0.024154663,0.015960693,0.01890564,-0.047607422,-0.011154175,-0.025924683,-0.0152282715,-0.0019569397,-0.01184845,-0.0057258606,-0.004058838,0.004825592,-0.004047394,-0.038085938,0.01109314,-0.03326416,-0.030853271,0.0035991669,-0.019699097,0.031982422,0.012176514,-0.0019950867,0.012565613,-0.0066375732,0.043518066,0.004322052,-0.021560669,0.030044556,0.030517578,0.010017395,-0.032043457,-0.0087509155,-0.005870819,-0.00592041,0.0053710938,-0.042175293,0.01361084,0.046417236,-0.016647339,-0.0027770996,0.003320694,0.025314331,-0.0061798096,0.013320923,-0.000019967556,0.017807007,-0.011512756,0.039520264,-0.050109863,0.011520386,0.010124207,0.004550934,-0.017471313,-0.01676941,-0.026565552,0.018127441,-0.0021591187,-0.009033203,0.038391113,0.0134887695,0.03250122,-0.02355957,-0.028717041,0.0066947937,-0.023971558,-0.015266418,0.012130737,-0.011779785,-0.00011330843,0.014770508,-0.020446777,0.038848877,-0.03768921,0.009750366,0.012336731,-0.0021152496,-0.0015630722,-0.0143585205,-0.018417358,0.008415222,-0.01524353,0.008010864,-0.010826111,0.051849365,0.014846802,0.032348633,0.058380127,0.020019531,0.0025367737,-0.043701172,-0.03768921,-0.005634308,-0.019317627,0.022109985,-0.015426636,0.06298828,0.031143188,0.010650635,0.035125732,0.01651001,0.033050537,0.0028476715,0.01626587,-0.011795044,0.016998291,-0.014770508,0.031036377,-0.005569458,0.03527832,-0.04751587,0.021255493,0.013595581,0.023422241,-0.024215698,0.032592773,0.06213379,0.025680542,-0.007575989,0.046875,-0.0017337799,-0.0031318665,-0.014205933,-0.0132751465,0.03878784,0.0048103333,0.027374268,0.05041504,0.0010910034,0.0054244995,0.021453857,-0.03756714,-0.025421143,0.05480957,0.030044556,-0.019226074,-0.018661499,-0.0011301041,0.013977051,-0.052368164,-0.018539429,0.024917603,0.006389618,-0.010147095,-0.008735657,-0.014060974,-0.009361267,0.00032925606,0.0206604,0.006500244,0.00075244904,0.024810791,0.020126343,-0.00617218,0.03074646,-0.006626129,0.025024414,-0.035003662,-0.014320374,0.02230835,0.01586914,-0.008422852,-0.011108398,0.03100586,-0.001953125,0.037719727,0.035980225,-0.03390503,0.0071411133,0.027740479,0.013259888,0.0037288666,0.057128906,0.04232788,0.012084961,0.034820557,0.034332275,0.027618408,-0.036834717,0.0062446594,-0.0014352798,0.007686615,-0.004383087,-0.011070251,0.008293152,-0.0070762634,0.019378662,-0.001405716,-0.011634827,0.026412964,0.02935791,-0.0023002625,-0.009559631,-0.0026493073,0.019378662,-0.024902344,-0.008605957,0.01777649,-0.008766174,0.036468506,0.021087646,0.026016235,-0.019927979,0.019546509,-0.008804321,-0.020324707,-0.00712204,0.01927185,-0.037872314,0.009429932,-0.012565613,-0.0030326843,-0.051574707,0.006389618,0.029464722,-0.017501831,0.02268982,0.014976501,-0.0052452087,-0.0154953,0.03656006,0.007511139,-0.001745224,-0.00995636,-0.015930176,0.02116394,0.039978027,-0.0064315796,0.005771637,-0.026062012,-0.005882263,0.0017175674,-0.014137268,0.005466461,-0.0006327629,-0.01159668,-0.030044556,0.023986816,0.03262329,0.025726318,0.050079346,-0.010986328,-0.0084991455,0.005973816,0.039154053,0.019760132,0.005302429,-0.0027923584,0.032928467,-0.02571106,0.04458618,0.03338623,0.013450623,0.02998352,-0.0037212372,-0.007675171,0.012878418,-0.016479492,0.029220581,-0.022415161,0.007411957,-0.0067710876,0.026000977,-0.009979248,-0.03665161,0.014480591,-0.010726929,-0.01676941,-0.01663208,0.009147644,0.0011806488,0.035247803,0.04220581,0.021514893,-0.029174805,0.061035156,-0.010131836,0.042388916,-0.000013530254,-0.00970459,0.04940796,0.0064048767,0.03253174,0.019577026,0.010284424,-0.034973145,0.019165039,0.029663086,0.03543091,0.006690979,0.011253357,-0.019042969,0.04232788,-0.015899658,0.037506104,-0.0010757446,0.0054969788,0.015312195,-0.00198555,-0.0098724365,-0.0044517517,-0.012275696,0.010055542,0.044799805,-0.02468872,-0.0046043396,-0.009651184,-0.018341064,0.02708435,-0.0032863617,0.007286072,-0.0018577576,-0.027954102,0.0054893494,-0.030349731,-0.029693604,0.00881958,0.018753052,-0.044311523,-0.00029444695,0.013122559,0.01878357,-0.032073975,0.029190063,0.021713257,-0.0038337708,0.0040740967,0.046539307,-0.008216858,0.030639648,-0.00983429,0.033355713,0.046661377,0.0014066696,-0.0101623535,0.0047187805,0.011650085,-0.0021514893,0.009887695,0.029266357,-0.015335083,0.0073127747,0.0054512024,0.0104522705,-0.001783371,0.008964539,-0.010391235,0.013595581,-0.022232056,-0.0012874603,0.0046691895,0.006263733,-0.00071048737,0.0013904572,-0.0074310303,-0.011291504,0.014480591,0.026977539,0.02104187,-0.027664185,0.0048599243,-0.0031776428,0.012649536,-0.015602112,-0.012313843,-0.0062561035,-0.03741455,0.011253357,0.020492554,0.0061149597,0.013008118,-0.026046753,-0.0055999756,0.024765015,0.0184021,0.010772705,0.008300781,0.0012083054,0.007205963,-0.012557983,-0.009399414,-0.011787415,-0.000020623207,0.011604309,0.034179688,-0.0033454895,-0.026443481,0.024230957,0.007888794,0.006072998,-0.0033454895,-0.021728516,0.03152466,-0.0052490234,-0.0032672882,0.0055999756,0.009788513,-0.015792847,-0.0032234192,-0.015388489,0.042541504,0.058502197,-0.01109314,-0.025619507,0.013336182,0.02381897,0.025054932,0.037719727,-0.0011005402,0.04559326,0.01828003,-0.025848389,-0.024993896,0.017929077,-0.011260986,-0.01638794,0.005493164,-0.010902405,-0.007820129,0.014953613,0.010787964,0.0018148422,-0.030059814,-0.019989014,-0.010177612,-0.009414673,0.02078247,-0.00409317,0.012710571,-0.019638062,-0.007827759,0.018875122,-0.03225708,-0.05319214,-0.012054443,0.0070228577,-0.014778137,-0.06530762,0.00063562393,-0.021591187,0.0047912598,-0.0211792,-0.0011787415,-0.008354187,0.011451721,-0.0158844,0.0005545616,0.0058784485,0.029769897,0.0158844,-0.011367798,0.018432617,-0.024475098,-0.022140503,-0.030883789,0.009498596,-0.020141602,0.027114868,-0.0066452026,0.0309906,0.017303467,-0.0016126633,-0.002298355,-0.0096588135,-0.0069351196,-0.0115356445,-0.013519287,-0.029907227,0.03314209,0.009239197,-0.00030374527,-0.016357422,0.042388916,-0.020401001,-0.010368347,0.021575928,0.04324341,0.0071792603,0.031311035,-0.011116028,-0.006175995,-0.015991211,0.00037240982,-0.01953125,-0.003967285,0.012306213,0.002855301,-0.008171082,0.006149292,0.023635864,-0.00894928,0.003791809,0.03793335,0.008666992,-0.013572693,0.03756714,0.01638794,-0.0014381409,-0.008903503,-0.018707275,0.021331787,0.049713135,0.005794525,0.0057907104,-0.008369446,0.0063056946,-0.015464783,0.009765625,0.014556885,-0.0124435425,-0.05102539,-0.020568848,-0.034088135,0.02645874,-0.0063285828,0.01550293,-0.008430481,0.016723633,-0.0006432533,-0.02658081,-0.01965332,0.029830933,0.01789856,-0.011024475,-0.014083862,0.013725281,0.015151978,-0.038726807,-0.004764557,-0.032165527,-0.032348633,-0.012886047,-0.017456055,0.022125244,0.0073661804,-0.006980896,0.0007739067,-0.009590149,0.0029125214,0.0029125214,0.029464722,0.00066518784,-0.0005259514,0.036224365,0.017547607,-0.02003479,0.01725769,-0.014175415,-0.0019435883,0.0073776245,-0.0042800903,0.025421143,-0.018798828,0.029846191,-0.016555786,-0.013000488,0.029296875,0.00023925304,0.0055351257,-0.023788452,0.0058135986,-0.0054969788,-0.0060157776,0.032592773,-0.025787354,-0.026809692,0.010269165,-0.021560669,-0.02293396,0.0088272095,0.016036987,0.024978638,-0.016052246,0.038909912,-0.012924194,-0.0096588135,0.019042969,0.008255005,-0.011459351,0.0051651,0.037139893,-0.005004883,0.0040779114,0.008621216,-0.0016355515,-0.02507019,-0.011047363,0.012779236,-0.006389618,-0.018798828,0.03274536,0.01576233,0.044921875,-0.009857178,0.018753052,0.014953613,-0.0026073456,0.020339966,0.0065574646,0.050354004,-0.0039978027,-0.018829346,0.013542175,0.00415802,-0.023864746,0.005622864,0.0022392273,0.0028152466,-0.040802002,0.014442444,-0.005908966,0.019104004,-0.020263672,0.0102005005,-0.023864746,-0.002122879,-0.038238525,0.0024337769,-0.033294678,0.01524353,0.03945923,0.02017212,0.03149414,0.00017774105,-0.023742676,0.021362305,0.057861328,-0.0018377304,-0.040618896,-0.023590088,0.010345459,-0.011505127,0.009017944,0.0067367554,-0.020935059,-0.016479492,0.0023822784,-0.006351471,0.008056641,0.0006375313,0.021347046,0.0071792603,-0.0015926361,-0.006679535,0.021209717,-0.012207031,-0.003540039,0.014282227,0.006652832,0.028167725,0.028900146,-0.024047852,0.022201538,0.014427185,-0.0473938,0.058807373,-0.0022621155,0.02798462,-0.018661499,0.018951416,-0.03994751,-0.02670288,-0.012268066,0.007835388],"createdAt":"2026-04-18T18:36:28.164Z","updatedAt":"2026-04-23T15:00:45.100Z","lastSeenAt":"2026-04-23T15:00:45.100Z","tsv":"'/api/v1/products/31':114 '/call':13,32 '0.02':12,31,67,154,189 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':139 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':142 '20000':146 '300':158 '6':151 'Base network API' 'USDC micropayment API' 'accept':129 'access':120 'actual':211 'address':138 'advertis':163 'ai-inference' 'ai/ml':57 'analysi':167 'analyt':56 'api':5,17,24,36,45,84,119 'application/json':123 'attach':96 'base':8,27,75,135,147 'behavior':212 'beyond':194 'broad':50 'broader':161 'caller':94 'catalog':51 'challeng':126 'classif':170 'confirm':127 'connect':207 'convers':182 'cost':66 'crypto-paid API' 'data':55,60 'data-analytics' 'decim':152 'document':193 'embed':171 'empti':200 'enabl':44 'endpoint':53,65,112,164,220 'equal':153 'essenti':199 'estim':179 'everi':64 'exact':131 'exchang':174 'feed':173 'finance-data' 'finance/web3':59 'format':217 'gas':178 'generat':184 'geocod':180 'header':101 'howev':192 'infer':58 'input':213 'json-response' 'key':18,37,85 'land':196 'limit':93 'list':116 'lowpaymentfee' 'lowpaymentfee.com':39 'maxamountrequir':144 'mean':80 'network':9,28,76 'no-api-key' 'no-auth API' 'offer':48 'page':197,204 'paid':70 'pay':2,21,136 'pay-per-call API' 'pay-per-request':1,20 'payment':100,105,132 'per':3,22,68 'platform':6,25,46,162 'point':191 'premium':118 'price':172,190 'proof':106 'protocol':79 'quot':177 'rate':92,175 'request':4,23,69,109 'requir':19,38 'respons':216 'return':122 'schema':214 'scheme':133 'second':159 'sentiment':166 'servic':63 'show':206 'sign':88 'sign-up':87 'simpli':95 'span':54 'specif':111 'sub':203 'sub-pag':202 'summar':169 'text':168 'timeout':156 'token':176 'undocu':222 'unit':148 'up':89 'usdc':15,34,72,141 'usdc-base-network' 'use':140 'util':62 'utility-services' 'valid':104,181 'via':10,29 'wallet':208 'x':99 'x-payment':98 'x402':11,30,43,78,125 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"6dbdc60a-c196-4887-a252-92458c6afa04","listingId":"3dba7f9c-9e91-43d0-863b-ef474e5b593f","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/products/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:28.164Z"}],"sources":[{"listingId":"3dba7f9c-9e91-43d0-863b-ef474e5b593f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/31","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:28.164Z","lastSeenAt":"2026-04-23T15:00:45.100Z"}],"details":{"listingId":"3dba7f9c-9e91-43d0-863b-ef474e5b593f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/31 \\\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":"All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge confirms maxAmountRequired of 20000 base units in USDC (6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/products/31"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with payTo 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/products/31"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time crypto token quotes and gas estimates via micropayment","Running geocoding or data validation calls on a per-request payment basis","Exporting analytics data or generating insights reports with no subscription commitment"],"bestFor":["Agents and bots that need frictionless, keyless API access via crypto micropayments","Developers prototyping with low-cost, no-commitment API calls","Web3-native applications already operating on the Base network"],"notFor":["Users who need detailed API documentation, input/output schemas, or SLA guarantees","High-volume production workloads where $0.02/request adds up and bulk pricing is preferred","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.635Z"},"updatedAt":"2026-04-23T15:00:45.100Z"}}