{"id":"30287c13-ff61-4448-b4f2-e6afe2e8ee81","shortId":"PXX4vV","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that exposes a broad set of 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 endpoints are priced at $0.02 per request, settled in USDC on the Base network via the x402 protocol.\n\nThe specific endpoint `/api/v1/messages/52` is listed under the title \"Premium API Access.\" Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are required — callers simply attach an X-PAYMENT header to each POST request.\n\nDocumentation is minimal: the landing page lists available endpoints and pricing, but there is no OpenAPI spec, no request/response schema documentation, and the /api, /pricing, and /README pages all resolve to a bare \"Connect wallet\" prompt. The purpose of the `/api/v1/messages/52` endpoint specifically is unclear — it could be a messaging or content retrieval endpoint, but no description beyond \"Premium API Access\" is provided.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-sentiment","ai-summarization","ai-classification","ai-embeddings","finance-prices","exchange-rates","crypto-gas","geocoding","validation","conversion"],"categories":["api-platform","llm","finance","geo"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for any endpoint","The specific endpoint /api/v1/messages/52 has no description beyond 'Premium API Access' — its function is unknown","Sub-pages (/api, /pricing, /README) return only a 'Connect wallet' prompt with no useful content","No request body or response body examples are documented anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/messages/52","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/messages/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation for the specific /messages/52 endpoint, and the crawled sub-pages are empty. The purpose of this particular endpoint is ambiguous.","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":"2026-04-21T23:17:01.630Z","embedding":[-0.020385742,-0.028839111,0.05050659,0.009124756,0.0049552917,-0.021240234,-0.0413208,0.042236328,0.06719971,-0.07269287,0.017318726,-0.043518066,-0.0413208,-0.029418945,-0.0011358261,0.0181427,-0.003206253,-0.0021514893,-0.03540039,0.043792725,0.023010254,-0.016937256,-0.027694702,0.036071777,-0.0070610046,-0.03387451,0.005367279,0.00025773048,-0.017822266,-0.036987305,0.05429077,-0.028305054,-0.0022830963,-0.0036468506,-0.019378662,-0.004924774,-0.0057868958,0.03225708,0.028564453,-0.024169922,-0.0104522705,-0.050567627,0.01210022,-0.016113281,-0.051513672,-0.006336212,0.016845703,-0.0042304993,0.009277344,0.015014648,-0.047912598,-0.003583908,0.0070495605,0.009757996,-0.0010118484,-0.0011262894,-0.003604889,-0.00043058395,0.020721436,0.0036830902,-0.0006980896,-0.049621582,-0.027908325,-0.010910034,0.001958847,0.058929443,-0.008033752,0.044525146,0.0000014305115,0.057556152,0.048065186,0.03845215,0.018737793,-0.0023059845,0.0048103333,-0.008659363,-0.013534546,0.07574463,-0.015571594,-0.02758789,-0.007003784,-0.014160156,-0.05496216,0.001159668,-0.017578125,-0.041931152,-0.02557373,0.030349731,-0.03353882,0.03253174,-0.08026123,-0.018951416,-0.017150879,-0.0038337708,0.012794495,-0.016433716,-0.008117676,0.015342712,-0.016494751,0.014694214,-0.0023403168,-0.059143066,-0.0023002625,0.0074539185,0.03463745,0.037506104,0.030822754,0.026763916,0.0039367676,-0.009719849,-0.058685303,0.024154663,-0.008331299,-0.0047454834,0.0063095093,0.015655518,-0.019424438,0.013656616,-0.02545166,0.010101318,-0.056549072,0.041229248,0.016494751,0.0014352798,0.0043907166,-0.05596924,-0.011375427,0.0056991577,-0.028427124,-0.0131073,0.012992859,0.014007568,0.04019165,-0.02142334,-0.03463745,0.0051002502,-0.012771606,-0.021514893,-0.049041748,-0.032104492,0.04046631,-0.029571533,0.015991211,0.02748108,-0.09069824,-0.017547607,-0.05078125,-0.0006504059,-0.036590576,-0.017181396,-0.004688263,0.02645874,-0.026916504,-0.01499939,-0.022979736,-0.013206482,0.004798889,0.024108887,-0.024642944,0.039245605,-0.012504578,0.01713562,0.017532349,-0.003271103,0.023864746,0.019577026,0.014099121,-0.09588623,-0.08319092,-0.027816772,-0.014518738,-0.038635254,-0.020614624,-0.0020256042,0.0032901764,-0.05834961,-0.019378662,-0.018997192,-0.0099487305,-0.03845215,0.010864258,-0.031066895,0.0072135925,-0.021347046,-0.053985596,-0.022720337,-0.012275696,0.06222534,0.024459839,0.014122009,0.023284912,-0.01876831,0.07470703,0.031402588,-0.016708374,-0.023040771,0.018356323,-0.021331787,0.025436401,-0.001127243,0.004398346,-0.028198242,0.049804688,0.05734253,0.0015926361,-0.017288208,-0.010406494,-0.04714966,-0.047027588,-0.038146973,0.021331787,-0.0051956177,-0.00018835068,0.03100586,-0.03616333,-0.04736328,-0.018753052,0.0107040405,-0.0046195984,0.05596924,0.010665894,0.00548172,0.030059814,-0.0000218153,-0.037750244,0.036071777,0.03881836,0.016464233,-0.02960205,-0.010551453,0.042053223,0.017837524,-0.017578125,0.0010051727,-0.0062446594,0.04977417,-0.0055732727,0.02116394,0.026626587,0.0005965233,-0.022125244,-0.036895752,-0.0112838745,0.027633667,-0.0036067963,-0.021987915,-0.041259766,-0.085632324,0.044006348,0.03793335,0.059631348,-0.026748657,-0.00040268898,-0.020309448,-0.0056419373,-0.06628418,0.052490234,0.068481445,0.004634857,-0.016815186,0.013885498,-0.0024681091,-0.030670166,0.009895325,-0.0047912598,-0.028701782,-0.005214691,0.015411377,-0.05633545,-0.010055542,0.019958496,0.0028648376,0.058776855,0.008377075,-0.05303955,-0.01159668,0.0021915436,-0.0064697266,-0.020568848,0.0077209473,-0.0052261353,0.0110321045,0.028320312,-0.015960693,0.017166138,-0.0052452087,0.022125244,-0.011154175,-0.0014104843,-0.027664185,-0.03781128,-0.0030899048,0.006778717,-0.06341553,0.016296387,-0.0033779144,0.07244873,-0.035186768,0.018096924,-0.0052986145,0.012954712,0.04815674,0.0033817291,-0.056121826,0.017166138,0.028015137,0.018493652,0.04159546,0.0104904175,-0.049987793,0.007232666,0.067993164,-0.006099701,-0.004146576,-0.0077323914,0.006462097,0.028533936,-0.0137786865,-0.05117798,-0.03237915,-0.007007599,-0.027877808,0.025405884,-0.022659302,0.0019950867,-0.007801056,0.016448975,-0.017852783,0.0024166107,-0.018844604,0.029525757,-0.012138367,0.012001038,0.0060806274,-0.022338867,0.013977051,0.0070228577,-0.011878967,0.012832642,0.035980225,0.030853271,-0.007419586,-0.039367676,-0.025756836,-0.010025024,-0.023666382,0.014404297,0.02406311,0.025543213,0.056854248,-0.029342651,0.003293991,0.035247803,0.017669678,0.04534912,-0.008346558,0.004299164,-0.051086426,-0.053497314,-0.023727417,-0.033111572,0.014099121,0.024047852,-0.00041675568,0.058898926,0.0102005005,-0.03463745,-0.048095703,0.020202637,-0.040039062,0.0024433136,0.02848816,-0.005092621,-0.033111572,-0.008872986,-0.004650116,-0.0031166077,0.031677246,0.0062561035,0.023452759,0.06829834,0.03164673,-0.010269165,0.014709473,-0.00087213516,0.03186035,0.008094788,-0.020462036,-0.02116394,-0.0007123947,0.037628174,-0.020507812,-0.036193848,-0.062408447,0.05734253,0.0385437,0.056610107,0.0066452026,0.00969696,0.039001465,-0.007381439,-0.0015182495,-0.035614014,-0.006149292,-0.0335083,-0.03427124,0.026473999,-0.012016296,-0.0052337646,-0.01576233,0.03527832,-0.007774353,0.023101807,-0.019515991,0.026229858,-0.0014047623,0.01826477,0.0079193115,-0.0019197464,0.04550171,0.06750488,-0.043029785,0.02659607,0.022033691,-0.02909851,0.0132751465,0.057403564,-0.024642944,-0.012519836,-0.06137085,-0.032043457,-0.018356323,-0.0029830933,-0.06347656,0.0068969727,-0.0015773773,0.02130127,0.044647217,-0.018615723,-0.015449524,-0.0063934326,-0.008049011,-0.070617676,-0.012054443,-0.03842163,0.0055503845,0.038757324,-0.013832092,-0.0035247803,-0.0037937164,-0.015716553,-0.015777588,0.00043940544,0.029312134,-0.012771606,-0.051239014,0.055847168,0.02696228,0.0154953,0.016921997,0.02999878,0.013885498,0.019760132,0.051818848,0.00242424,-0.03024292,-0.061431885,0.014030457,-0.058135986,0.026947021,0.019897461,-0.0095825195,0.0066070557,-0.001376152,-0.0309906,-0.040008545,0.003993988,-0.031219482,0.013442993,0.015686035,-0.030883789,-0.023620605,-0.055389404,-0.023590088,-0.015823364,0.06726074,0.023544312,-0.029464722,-0.049682617,0.0027561188,0.019134521,0.004131317,0.021911621,-0.015083313,-0.020736694,-0.015792847,-0.041137695,-0.005748749,-0.013206482,0.00982666,-0.0056381226,-0.011230469,0.027023315,-0.0032672882,0.02986145,-0.010360718,0.0070343018,0.020706177,-0.030853271,-0.0018119812,-0.0060539246,0.029953003,0.010940552,-0.008155823,-0.033813477,0.029251099,0.017425537,0.04135132,-0.026275635,-0.004421234,0.012901306,0.015396118,0.036193848,-0.01687622,-0.014213562,-0.009353638,-0.061798096,-0.050109863,0.029022217,-0.018035889,0.034118652,0.02267456,0.018356323,0.012710571,-0.017150879,0.0073547363,-0.0030841827,-0.03488159,-0.0043678284,-0.02973938,-0.037078857,-0.019119263,-0.0022945404,-0.019866943,0.019729614,-0.010284424,0.0045928955,0.017120361,-0.028274536,0.021438599,0.007286072,-0.013450623,0.029342651,-0.0008883476,0.028015137,0.036376953,-0.0011425018,-0.047424316,0.027145386,-0.0033016205,0.012306213,-0.013938904,0.046813965,0.042877197,-0.014656067,-0.014572144,-0.0018615723,-0.0032253265,-0.025390625,-0.0013742447,0.009963989,0.015174866,-0.021331787,-0.050842285,0.011199951,0.009506226,-0.029037476,-0.02268982,0.011993408,0.01802063,-0.02909851,0.027908325,0.018218994,0.047180176,-0.032592773,0.0075683594,0.008300781,0.029953003,0.03955078,0.015266418,-0.0073280334,0.003004074,-0.0035438538,0.011199951,-0.015136719,-0.003944397,0.012382507,-0.006385803,0.020095825,0.025878906,0.022644043,-0.026779175,-0.030059814,0.017669678,-0.01134491,-0.019134521,0.010932922,0.0099487305,0.03050232,-0.02960205,0.021774292,0.009422302,-0.012863159,-0.021408081,-0.012237549,0.017807007,-0.012466431,-0.019866943,0.032989502,0.010101318,0.016586304,-0.042175293,-0.00037503242,-0.000289917,0.011077881,-0.016525269,-0.04623413,-0.044555664,0.015396118,0.020202637,0.023880005,0.028167725,0.03451538,-0.008026123,0.000036478043,0.01309967,0.006916046,-0.013084412,-0.011421204,-0.0418396,-0.022445679,0.000521183,0.009223938,-0.03753662,0.018753052,-0.010238647,-0.030960083,0.0032291412,-0.0073928833,-0.00044751167,-0.018218994,0.019699097,0.04840088,0.0067443848,0.019454956,-0.015281677,-0.026626587,-0.003993988,0.004550934,0.019363403,-0.060791016,0.021087646,-0.014404297,0.0074157715,0.008460999,0.00869751,0.010353088,0.023330688,0.005924225,0.025558472,-0.041137695,0.049224854,-0.033691406,0.027908325,-0.0006341934,-0.041381836,-0.015571594,-0.043060303,-0.003736496,0.035186768,-0.023986816,-0.023498535,-0.030029297,-0.029449463,-0.016098022,-0.053344727,0.01638794,0.036895752,0.050109863,-0.028533936,0.009857178,0.00072717667,0.005050659,-0.023406982,0.012908936,0.0024700165,0.01474762,0.030288696,0.009017944,-0.021697998,-0.026000977,-0.025985718,-0.011886597,-0.05142212,-0.059692383,-0.014427185,-0.0002220869,-0.010574341,-0.0037631989,-0.020690918,-0.038269043,-0.002286911,-0.044647217,0.018829346,0.0015296936,0.023284912,0.005809784,-0.025131226,0.0037441254,0.018081665,-0.017715454,0.031555176,-0.005924225,-0.005680084,-0.031555176,0.0026359558,0.021316528,0.028121948,-0.00072288513,-0.0025539398,-0.0026626587,-0.0090408325,-0.041900635,-0.0031280518,-0.0036811829,-0.018417358,-0.009025574,0.004798889,-0.049682617,0.0011920929,-0.021759033,-0.012107849,0.040222168,-0.00073862076,0.004432678,-0.008972168,0.00843811,-0.0047416687,-0.012718201,-0.025848389,0.020202637,0.01108551,0.005332947,0.025482178,0.036499023,0.013298035,-0.018447876,0.014122009,0.0066719055,0.02331543,-0.018676758,0.01007843,-0.032440186,0.020812988,-0.020217896,-0.0069618225,-0.031982422,-0.00020682812,0.07800293,-0.009788513,-0.014923096,-0.009284973,-0.0073928833,0.019302368,0.031219482,-0.046203613,-0.0048561096,-0.035369873,0.01852417,-0.02444458,0.024887085,0.008682251,0.018966675,-0.018569946,-0.048614502,-0.0096206665,0.0008735657,-0.012954712,-0.072509766,-0.022094727,-0.05807495,0.0088272095,-0.007873535,-0.023254395,0.00037550926,0.009819031,-0.011253357,-0.07208252,0.010017395,0.052612305,0.0076522827,0.029525757,-0.0038032532,0.0030879974,0.019546509,-0.021438599,-0.0028457642,0.040161133,-0.03274536,-0.015449524,-0.018569946,0.023742676,-0.0019702911,-0.019165039,0.008865356,0.0028705597,0.02130127,-0.0055656433,0.016296387,-0.020431519,0.03149414,-0.016220093,0.020523071,-0.0051498413,-0.011642456,0.043823242,-0.0513916,0.02809143,0.021591187,0.00026130676,-0.0018815994,0.03491211,0.04611206,-0.0368042,-0.017089844,0.007896423,0.001420021,0.03829956,-0.01802063,0.033843994,0.013542175,-0.014518738,0.0138168335,-0.004245758,-0.012062073,-0.035339355,-0.038116455,0.030960083,0.0042419434,0.0021076202,-0.015792847,0.013748169,0.023132324,-0.004032135,0.009414673,-0.001250267,-0.03427124,-0.024032593,-0.0058784485,0.0041503906,0.002483368,0.0027370453,0.027374268,0.0037899017,0.030456543,0.0028018951,-0.010864258,-0.005794525,0.035888672,-0.0021972656,-0.00548172,0.021331787,0.009223938,0.017288208,0.02923584,0.0061912537,-0.044525146,-0.0074539185,-0.02470398,-0.010894775,0.016174316,-0.010566711,-0.012809753,0.002603531,0.005142212,-0.006565094,-0.024734497,0.010131836,-0.018539429,-0.027145386,-0.004299164,0.0084991455,0.022415161,0.009559631,0.008216858,0.016189575,-0.015037537,0.056396484,-0.0051612854,-0.01525116,0.013130188,0.026473999,0.012390137,-0.04248047,-0.010726929,-0.00054740906,-0.0043907166,0.003917694,-0.03250122,0.018066406,0.047058105,-0.013298035,0.0129776,0.015068054,0.027374268,-0.015052795,-0.003753662,-0.0021781921,0.017242432,-0.012413025,0.024612427,-0.0541687,0.026168823,0.0015249252,0.0063056946,-0.009460449,-0.020568848,-0.026565552,0.030212402,0.001996994,-0.007785797,0.03878784,0.0039901733,0.021697998,-0.01979065,-0.0025119781,-0.005420685,-0.03189087,-0.021209717,0.021652222,-0.004245758,0.007801056,0.009712219,-0.017059326,0.028411865,-0.031585693,0.0049743652,0.010223389,-0.0045547485,-0.0135650635,-0.013748169,-0.019485474,0.009918213,-0.025909424,-0.001657486,-0.0048980713,0.054626465,0.021133423,0.04638672,0.029388428,0.009269714,0.0023536682,-0.043884277,-0.037841797,-0.0036945343,-0.020889282,0.030670166,-0.019958496,0.052124023,0.03665161,-0.0121536255,0.036132812,0.042633057,0.032348633,0.00028181076,0.014045715,-0.014533997,0.007659912,-0.01914978,0.024795532,0.011077881,0.034240723,-0.032806396,0.027053833,0.026290894,0.01914978,-0.024261475,0.03338623,0.060913086,0.023895264,0.004486084,0.033843994,0.0053520203,-0.018920898,0.0054244995,-0.03515625,0.048065186,0.01436615,0.055267334,0.042938232,0.00541687,0.0018539429,0.017852783,-0.025344849,-0.029449463,0.061706543,0.01979065,-0.027770996,-0.0107803345,-0.00642395,0.004096985,-0.046661377,-0.035247803,0.01940918,-0.014320374,0.019683838,-0.023071289,-0.010818481,-0.0035972595,0.0063591003,0.024154663,0.015197754,-0.003250122,0.012298584,0.02243042,0.0048561096,0.029968262,0.0044288635,0.03010559,-0.029388428,-0.025680542,0.025878906,0.007419586,-0.007888794,0.0099105835,0.030288696,0.0030574799,0.044647217,0.036712646,-0.028884888,0.0038700104,0.03149414,0.012260437,0.0067863464,0.05911255,0.02760315,0.0047416687,0.033203125,0.03933716,0.027877808,-0.027420044,0.020614624,0.0032691956,-0.0013904572,-0.0044059753,-0.011558533,0.010261536,0.0071754456,0.013442993,-0.0066184998,-0.027038574,0.017608643,0.014961243,-0.005706787,-0.012123108,-0.0034751892,0.018554688,-0.011024475,-0.0034713745,0.01486969,-0.02230835,0.040283203,0.00491333,0.019744873,-0.019943237,0.015411377,-0.0006914139,-0.032165527,-0.008811951,0.025299072,-0.030670166,0.017242432,0.0031089783,-0.0012273788,-0.056762695,0.022857666,0.028274536,-0.017623901,0.037384033,0.014137268,-0.012817383,0.010665894,0.0067100525,0.0012674332,0.0016899109,-0.005771637,-0.02293396,0.035369873,0.03881836,0.012176514,0.02319336,-0.014099121,-0.015686035,0.0075187683,0.0006480217,-0.0028877258,-0.009567261,-0.021408081,-0.013198853,0.02482605,0.0236969,0.029922485,0.037963867,-0.013336182,-0.01689148,0.018310547,0.03515625,0.01108551,0.003786087,-0.0023441315,0.026107788,-0.028839111,0.04598999,0.05130005,0.016189575,0.049041748,0.0028476715,0.0051956177,0.015396118,-0.0032482147,0.023605347,-0.031555176,0.009864807,-0.019378662,0.02229309,-0.019515991,-0.04751587,0.029312134,-0.015808105,-0.02079773,-0.016601562,0.009895325,-0.0041122437,0.04067993,0.03262329,0.015068054,-0.0335083,0.064086914,-0.016403198,0.04751587,0.000040888786,-0.02331543,0.046020508,0.0231781,0.03302002,0.013687134,0.02128601,-0.044769287,0.016311646,0.047912598,0.019989014,0.0028457642,-0.012168884,-0.012901306,0.04421997,0.007827759,0.024291992,-0.017089844,0.006816864,0.01776123,-0.0035381317,-0.012107849,-0.013023376,0.00005733967,0.00040483475,0.051696777,-0.0138549805,-0.010818481,-0.02255249,-0.011489868,0.027236938,-0.0033550262,-0.0032901764,-0.0129776,-0.032592773,0.007713318,-0.037628174,-0.019592285,0.017547607,0.01399231,-0.0345459,-0.02268982,0.009277344,0.014389038,-0.037353516,0.029968262,0.020080566,0.010787964,0.0026779175,0.042266846,-0.022750854,0.021484375,-0.014099121,0.021820068,0.03930664,0.0019445419,-0.02104187,0.0042419434,0.0152282715,-0.0105896,0.017669678,0.032470703,0.0010652542,0.009635925,-0.0049095154,-0.0034618378,0.004463196,-0.010673523,-0.018295288,0.007827759,-0.013153076,-0.011894226,0.010406494,0.0050735474,-0.0038833618,0.016159058,-0.029388428,-0.017623901,0.014518738,0.04107666,0.023025513,-0.030792236,0.00566864,0.007209778,-0.00017309189,-0.029891968,-0.011146545,0.0028419495,-0.028244019,0.014122009,0.02204895,0.00712204,0.027908325,-0.020767212,0.0022602081,0.01991272,-0.0055770874,0.017318726,0.006793976,-0.015975952,0.0015449524,-0.01701355,-0.010673523,-0.017700195,-0.00712204,0.010025024,0.01727295,-0.009162903,-0.019210815,0.026000977,-0.008529663,0.018997192,-0.0023078918,-0.010055542,0.014572144,-0.008140564,-0.010604858,-0.0010976791,0.0256958,-0.011138916,-0.012519836,-0.020401001,0.02986145,0.046447754,-0.014373779,-0.014518738,0.025756836,0.0140686035,0.032196045,0.052886963,0.025985718,0.04019165,0.011779785,-0.020202637,-0.015266418,0.016235352,-0.0025577545,-0.015701294,0.016052246,-0.007888794,-0.009513855,0.017654419,0.0010671616,-0.0019235611,-0.028564453,-0.023803711,-0.0181427,-0.031555176,0.013381958,0.00085544586,0.012481689,-0.012397766,-0.012382507,-0.0027103424,-0.030136108,-0.053955078,-0.00920105,-0.0036239624,-0.010269165,-0.06222534,-0.005420685,-0.034362793,0.019042969,-0.0064697266,-0.002828598,-0.020202637,0.0368042,-0.014015198,-0.0072021484,-0.002614975,0.014045715,0.035064697,0.015388489,0.016723633,-0.024658203,-0.016647339,-0.02909851,0.019943237,-0.0234375,0.026931763,0.0024967194,0.03237915,0.011184692,-0.00043797493,0.006313324,-0.022445679,-0.009941101,-0.01360321,-0.021270752,-0.023742676,0.02154541,0.0056762695,-0.015213013,-0.0057029724,0.031097412,-0.017730713,-0.010612488,0.020874023,0.036224365,0.0017004013,0.025390625,-0.017196655,0.007472992,-0.015449524,-0.00082206726,-0.012039185,0.002111435,0.0060539246,0.009239197,-0.0059318542,-0.00012105703,0.022567749,-0.005962372,0.00068187714,0.0121154785,0.009094238,-0.006828308,0.028961182,0.013908386,0.0033550262,-0.01676941,-0.018447876,0.023849487,0.038238525,0.012886047,0.008918762,-0.010787964,0.010231018,-0.014839172,0.0057029724,0.014602661,-0.024383545,-0.028747559,-0.01914978,-0.03463745,0.030380249,-0.006942749,0.012397766,-0.0071868896,0.009269714,-0.012992859,-0.03213501,-0.0112838745,0.011917114,0.009094238,-0.0079422,-0.0043525696,0.008682251,0.014030457,-0.026947021,-0.009094238,-0.03765869,-0.036743164,-0.0052986145,-0.0138168335,0.023803711,0.009933472,-0.0012102127,-0.0000044703484,-0.0008535385,-0.0025424957,-0.008140564,0.027923584,-0.012023926,-0.004383087,0.021850586,0.015083313,-0.032165527,0.019378662,-0.008644104,-0.00919342,0.014930725,-0.013084412,0.019332886,-0.010215759,0.040527344,0.0013637543,-0.0019302368,0.039154053,0.0061454773,0.015701294,-0.029968262,0.006954193,0.01121521,-0.008453369,0.045410156,-0.019058228,-0.014007568,0.00026464462,-0.01576233,-0.02949524,0.009841919,0.019607544,0.035827637,-0.0061035156,0.050323486,-0.0072746277,-0.0058555603,0.012214661,0.010726929,-0.006462097,-0.00024986267,0.02960205,0.01108551,0.0019302368,-0.0001013875,-0.00756073,-0.036865234,-0.00554657,0.005050659,0.0005302429,-0.005970001,0.02355957,0.012306213,0.039978027,-0.002254486,0.01600647,0.017242432,-0.0034675598,0.03161621,0.0051612854,0.045013428,-0.015586853,-0.031982422,0.0014848709,0.00078725815,-0.023452759,0.0025501251,-0.013801575,-0.0009822845,-0.039794922,0.013687134,-0.007820129,0.026412964,-0.012619019,0.013908386,-0.027694702,-0.015449524,-0.049926758,-0.024047852,-0.03555298,0.008110046,0.022857666,0.0051612854,0.02760315,0.01121521,-0.025512695,0.02243042,0.0473938,-0.000008046627,-0.0317688,-0.011520386,0.010620117,-0.0047454834,0.011978149,0.01600647,-0.011253357,-0.020874023,0.00088500977,-0.013305664,0.013008118,-0.0055770874,0.013153076,0.01197052,-0.007820129,-0.0046844482,0.03164673,-0.011047363,0.007499695,0.01663208,0.0027561188,0.038909912,0.031585693,-0.020095825,0.02331543,0.02557373,-0.047912598,0.05819702,-0.0069770813,0.03918457,-0.010902405,0.024993896,-0.039978027,-0.022583008,-0.009124756,0.009712219],"createdAt":"2026-04-21T18:32:26.917Z","updatedAt":"2026-04-22T02:32:07.962Z","lastSeenAt":"2026-04-22T02:32:07.962Z","tsv":"'/api':200 '/api/v1/messages/52':112,217 '/pricing':201 '/readme':203 '/request':19,38 '0.02':18,37,95,139 '000':129 '0x8335':134 '20':128 '300':154 '6':143 'access':120,237 'across':54 'advertis':124 'ai':12,31,64 'ai-classification' 'ai-embeddings' 'ai-sentiment' 'ai-summarization' 'analysi':68 'analyt':58 'api':5,24,45,119,158,236 'attach':167 'avail':184 'bare':209 'base':8,27,103,130,136 'base network api' 'beyond':234 'broad':50 'call':4,23 'caller':165 'categori':56 'challeng':123 'classif':71 'connect':210 'content':228 'convers':88 'conversion' 'could':223 'crypto-gas' 'data':11,30,57,61 'data-analytics' 'decim':144 'descript':233 'document':177,197 'embed':72 'enabl':44 'endpoint':16,35,53,91,111,185,218,230 'equal':138 'estim':82 'exact':150 'exchang':77 'exchange-rates' 'export':62 'expos':48 'feed':76 'financ':13,32,73 'finance-prices' 'four':55 'gas':81 'generat':89 'geocod':86 'geocoding' 'given':140 'header':172 'infrastructur':84 'insight':63 'key':159 'land':181 'learn':66 'limit':162 'list':114,183 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':65 'made':147 'maxamountrequir':126 'messag':226 'metric':59 'micropayment api' 'minim':179 'network':104 'offer':10,29 'openapi':192 'page':182,204 'pay':2,21 'pay per call api' 'pay-per-cal':1,20 'pay-per-request' 'payment':145,171 'per':3,22,96 'platform':6,25,46 'post':175 'premium':118,235 'price':75,93,187 'prompt':212 'protocol':108 'provid':239 'purpos':214 'quot':80 'rate':78,161 'report':60 'request':97,176 'request/response':195 'requir':164 'resolv':206 'retriev':229 'schema':196 'scheme':151 'second':155 'sentiment':67 'set':51 'settl':98 'simpli':166 'spec':193 'specif':110,219 'summar':70 'text':69 'timeout':156 'titl':117 'token':79 'unclear':221 'unit':131 'usdc':9,28,100,133,141 'usdc api' 'usdc-base' 'util':15,34,85 'valid':87 'validation' 'via':105,148 'wallet':211 'web3':74 'x':170 'x-payment':169 'x402':43,107,122 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"819a59d0-43b9-4a16-ac60-ae719e867b21","listingId":"30287c13-ff61-4448-b4f2-e6afe2e8ee81","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/messages/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:26.917Z"}],"sources":[{"listingId":"30287c13-ff61-4448-b4f2-e6afe2e8ee81","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/messages/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:26.917Z","lastSeenAt":"2026-04-22T02:32:07.962Z"}],"details":{"listingId":"30287c13-ff61-4448-b4f2-e6afe2e8ee81","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/messages/52 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","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 minimums or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Endpoint categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge shows maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with exact scheme","source_url":"https://lowpaymentfee.com/api/v1/messages/52"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents that need on-demand AI inference (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time crypto gas estimates or token quotes with per-call billing","Geocoding or data validation as a utility microservice in automated pipelines","Accessing analytics metrics or data exports with zero upfront commitment"],"bestFor":["AI agents needing keyless, pay-per-call access to diverse utility endpoints","Developers prototyping with low-cost, no-commitment API access on Base","Web3-native applications that already hold USDC on Base"],"notFor":["High-volume production workloads where $0.02/request adds up (no bulk discounts documented)","Users who need detailed API documentation, schemas, or SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:00.195Z"},"updatedAt":"2026-04-22T02:32:07.962Z"}}