{"id":"d95e1ed8-e196-4c00-a000-ee0c2d68ef1a","shortId":"BSJCvf","kind":"x402","title":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","tagline":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints gated by the x402 payment protocol. This specific endpoint (`/api/v1/policies/23`) is listed as \"Premium API Access\" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) 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 offers 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.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, 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 description of what the `/api/v1/policies/23` endpoint actually returns. The endpoint is live (returns a proper 402 x402 challenge), but without documentation it is unclear what data or functionality \"Premium API Access\" provides beyond the generic label.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","no-api-key","http-post"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific function of /api/v1/policies/23 ('Premium API Access') is undefined — it is unclear what data or service it provides","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/23","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/policies/23","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 with clear pricing, but there is no OpenAPI schema, no documentation, no request/response examples, and the purpose of '/api/v1/policies/23' is entirely opaque beyond the label 'Premium API Access'. All doc pages return only 'Connect wallet' with no content.","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":"2026-04-19T08:01:05.352Z","embedding":[-0.021118164,-0.035583496,0.036956787,0.008514404,0.019439697,-0.020935059,-0.040222168,0.026931763,0.08087158,-0.06500244,0.03540039,-0.046051025,-0.02633667,-0.037750244,-0.028747559,0.011543274,-0.010757446,0.008468628,-0.038635254,0.039031982,0.032958984,0.0021476746,-0.03543091,0.031585693,0.0102005005,-0.022598267,0.0013313293,-0.0055007935,-0.013595581,-0.046203613,0.038085938,-0.027008057,-0.004211426,0.0017662048,-0.020324707,-0.015060425,-0.0118255615,0.042755127,0.03286743,-0.005584717,-0.012359619,-0.05770874,0.0019817352,-0.0062828064,-0.060394287,0.013153076,0.016433716,-0.025146484,-0.017654419,0.0026016235,-0.03756714,-0.010505676,-0.011421204,-0.01247406,0.016601562,0.009437561,-0.0009775162,-0.016357422,0.0023269653,0.005344391,0.0052948,-0.06500244,-0.014144897,0.011474609,0.0014505386,0.05947876,-0.010917664,0.03842163,0.025878906,0.05819702,0.05947876,0.058624268,0.027359009,0.014480591,-0.003698349,-0.0005955696,0.007820129,0.07141113,-0.020385742,-0.010559082,-0.015357971,-0.0060768127,-0.040527344,0.006462097,-0.013084412,-0.04815674,-0.026138306,0.004142761,-0.008300781,0.02078247,-0.06713867,-0.00084638596,-0.024459839,0.008094788,0.013427734,-0.015380859,-0.016342163,0.026489258,-0.01927185,0.020248413,-0.0021133423,-0.0395813,-0.000767231,0.02178955,0.053741455,0.051239014,0.02456665,0.022918701,0.020584106,-0.02142334,-0.03756714,-0.00005733967,-0.009887695,-0.002822876,0.004348755,0.008544922,-0.04751587,0.027648926,-0.00705719,0.01739502,-0.053955078,0.048431396,0.029251099,-0.029418945,0.01486969,-0.052734375,-0.02015686,0.016052246,-0.023910522,-0.008346558,0.032684326,0.009643555,0.03668213,-0.03062439,-0.037231445,0.019302368,0.005054474,-0.027801514,-0.05029297,-0.04168701,0.034057617,-0.026107788,0.021820068,0.019607544,-0.112854004,-0.0047302246,-0.060302734,-0.0043907166,-0.023498535,-0.005672455,-0.0053710938,0.028579712,-0.023391724,-0.005405426,-0.026290894,-0.020355225,0.01084137,0.033416748,-0.014411926,0.060943604,-0.01864624,0.04650879,0.018722534,0.009902954,0.03970337,0.031311035,0.0037384033,-0.06994629,-0.086120605,-0.036376953,-0.008865356,-0.0051078796,-0.03149414,0.0023002625,-0.0044021606,-0.08947754,-0.027023315,-0.0115356445,0.0027580261,-0.0390625,-0.0074501038,-0.026824951,-0.0021591187,-0.02003479,-0.06323242,-0.03086853,-0.033172607,0.075805664,0.00674057,0.018493652,0.028793335,-0.004798889,0.054138184,0.029449463,-0.015556335,-0.03817749,0.006023407,-0.02279663,0.013824463,0.010124207,-0.006828308,-0.031433105,0.04534912,0.058502197,0.005115509,-0.011009216,0.001036644,-0.0519104,-0.04244995,-0.040771484,-0.0047187805,0.011260986,-0.0016069412,0.034179688,-0.027130127,-0.026397705,-0.005821228,0.006916046,0.016143799,0.08959961,0.008895874,-0.00680542,0.025344849,0.017074585,-0.041534424,0.044403076,0.01979065,0.019973755,-0.040496826,-0.02696228,0.019699097,0.050872803,-0.030441284,0.008270264,-0.016220093,0.024917603,-0.0029392242,0.011123657,0.03062439,-0.019134521,-0.021453857,-0.028793335,-0.016967773,0.041290283,0.0023479462,-0.030395508,-0.038757324,-0.064575195,0.036193848,0.03086853,0.0473938,-0.012535095,0.005832672,-0.040374756,-0.0072288513,-0.06866455,0.05706787,0.0715332,-0.026123047,-0.013885498,0.011207581,0.013694763,-0.020370483,-0.02810669,-0.008232117,-0.031143188,-0.028152466,0.0046043396,-0.03463745,0.008422852,0.01701355,0.026351929,0.05493164,-0.0019330978,-0.04699707,-0.02658081,0.0073623657,-0.010032654,-0.025878906,0.015083313,-0.011520386,-0.009994507,0.026657104,-0.0019626617,0.04071045,-0.003107071,-0.0030002594,-0.010978699,-0.00019609928,-0.021621704,-0.025268555,0.02949524,-0.0039367676,-0.06951904,0.0129852295,-0.0084991455,0.061431885,-0.064453125,0.036621094,-0.01864624,0.013442993,0.058135986,-0.012176514,-0.038879395,0.00919342,0.031311035,0.01966858,0.021881104,0.00072193146,-0.02923584,-0.014480591,0.049865723,-0.02671814,-0.022415161,0.000682354,0.016708374,0.03265381,-0.0046195984,-0.066467285,-0.02885437,-0.015640259,-0.048980713,0.017166138,-0.01928711,0.030197144,-0.017974854,0.0074157715,-0.025604248,0.0042495728,-0.023010254,0.026031494,-0.027160645,0.0023822784,-0.014335632,0.0011787415,-0.0012636185,0.036712646,-0.0077934265,0.012237549,0.03656006,0.022537231,-0.0062675476,-0.030090332,-0.013427734,-0.033081055,0.009887695,0.017623901,0.026626587,0.020751953,0.061706543,-0.025741577,0.015235901,0.026321411,0.02154541,0.03100586,0.0022716522,0.016799927,-0.0736084,-0.06854248,-0.020843506,-0.02659607,0.03125,0.005844116,0.004173279,0.034606934,0.0002541542,-0.014480591,-0.033843994,0.023391724,-0.031677246,-0.007896423,0.03540039,-0.019317627,-0.02027893,0.0010089874,-0.001578331,0.008415222,0.043914795,0.017593384,0.011550903,0.06585693,0.05303955,0.008453369,0.028823853,0.017120361,0.032684326,-0.005558014,-0.027374268,-0.02381897,-0.0047950745,0.025558472,-0.016815186,-0.018234253,-0.061431885,0.046722412,0.03253174,0.062164307,0.018081665,0.013282776,0.026260376,-0.013832092,0.0055732727,-0.018569946,-0.009269714,-0.043029785,-0.036071777,0.022842407,-0.008834839,-0.003326416,-0.02960205,0.028717041,-0.007003784,0.013534546,-0.02305603,0.044952393,-0.009773254,-0.003528595,0.024871826,-0.00018548965,0.037353516,0.053894043,-0.03933716,0.03704834,0.017181396,-0.02923584,-0.0099105835,0.035461426,-0.023406982,-0.022460938,-0.05758667,-0.03564453,0.0019893646,0.000500679,-0.057647705,-0.000027537346,0.006290436,0.01134491,0.024032593,-0.021347046,-0.014923096,0.0059432983,-0.02243042,-0.056732178,0.0077781677,-0.036010742,-0.008804321,0.055236816,-0.014465332,0.0032463074,0.012130737,0.0024642944,0.01625061,0.018981934,0.022827148,-0.0016298294,-0.047973633,0.02609253,0.0206604,0.0099487305,0.026535034,0.027770996,0.028396606,0.022583008,0.045013428,0.019561768,-0.032989502,-0.060180664,0.01727295,-0.057556152,0.004348755,0.01133728,-0.013519287,-0.007843018,-0.021087646,-0.015197754,-0.03378296,-0.0027446747,-0.038604736,0.014709473,0.024002075,-0.03225708,-0.027801514,-0.060821533,-0.00982666,-0.004776001,0.061309814,0.040649414,-0.002811432,-0.061523438,-0.011886597,0.01637268,0.008590698,0.018508911,-0.015930176,-0.010757446,-0.023025513,-0.03677368,-0.01789856,-0.022750854,0.030685425,-0.008972168,-0.030929565,0.015533447,-0.012779236,0.018692017,0.0074424744,0.0062446594,0.016906738,-0.027862549,-0.0021800995,-0.015731812,0.032318115,0.00548172,-0.00907135,-0.04486084,0.042999268,0.018417358,0.034484863,-0.03161621,-0.0027332306,-0.005886078,0.005432129,0.018600464,-0.0070724487,-0.003921509,-0.0043640137,-0.05166626,-0.058624268,0.036346436,-0.023330688,0.034362793,0.0043563843,0.015586853,0.014816284,0.000017225742,0.011749268,0.024795532,-0.027160645,-0.0042419434,-0.02368164,-0.031921387,-0.031433105,0.0023345947,-0.015136719,0.01979065,-0.02810669,0.019699097,0.0022525787,-0.01739502,0.031219482,0.0033798218,-0.0028419495,0.01687622,0.0028591156,0.012336731,0.03894043,0.0028018951,-0.029876709,0.021224976,0.01625061,0.010604858,-0.016036987,0.038208008,0.02822876,-0.02230835,0.00088739395,-0.0029315948,-0.009376526,-0.016693115,-0.0067367554,0.008804321,0.030044556,0.00059461594,-0.038482666,0.0149383545,0.021270752,-0.024597168,-0.031036377,0.015083313,0.0074691772,-0.035095215,0.023590088,0.022277832,0.061950684,-0.015136719,0.016082764,0.0021705627,0.034454346,0.008979797,0.02178955,-0.003932953,0.024047852,-0.012573242,0.0019779205,0.0077781677,-0.005519867,0.022323608,0.0037002563,0.015365601,0.021484375,0.010017395,-0.02861023,-0.036743164,0.012123108,-0.00945282,-0.012489319,0.022384644,0.016464233,0.011985779,-0.022872925,0.017562866,0.0206604,-0.013313293,-0.02456665,-0.006668091,0.038391113,-0.016281128,-0.01914978,0.006427765,0.011634827,0.031036377,-0.057769775,-0.0023593903,0.009338379,0.008773804,-0.025970459,-0.03567505,-0.038909912,0.002275467,0.040100098,0.015380859,0.018005371,0.036010742,0.011360168,0.001156807,0.021240234,0.009010315,-0.007663727,-0.029373169,-0.047943115,-0.006652832,0.004634857,-0.0055999756,-0.041168213,0.015075684,-0.023208618,-0.03665161,0.013328552,-0.009559631,-0.009773254,-0.0023021698,-0.0020370483,0.020584106,-0.0015830994,0.015258789,-0.021972656,-0.03591919,0.0027046204,0.010986328,0.026977539,-0.049621582,0.016723633,-0.011077881,0.003211975,-0.0039100647,0.010292053,0.030853271,0.044677734,-0.0012130737,0.031433105,-0.042541504,0.03591919,-0.030761719,0.009559631,0.002161026,-0.03781128,-0.0017881393,-0.015098572,-0.008972168,0.03942871,-0.013465881,-0.0064811707,-0.037963867,-0.026473999,-0.01977539,-0.054718018,0.011436462,0.03540039,0.036071777,-0.019897461,-0.0002529621,-0.007873535,-0.005428314,-0.021499634,0.0042800903,-0.008895874,0.022857666,0.0121154785,0.008255005,-0.037078857,-0.026870728,-0.0129470825,-0.0028018951,-0.039794922,-0.04574585,-0.014533997,0.0043754578,-0.008590698,-0.015640259,-0.032470703,-0.02923584,0.0016927719,-0.033416748,0.014038086,0.004650116,0.015975952,0.016616821,-0.019683838,0.013214111,0.024291992,-0.0143966675,0.03463745,0.003967285,-0.0028591156,-0.035705566,0.013198853,0.031921387,0.022583008,-0.011886597,-0.011672974,-0.011894226,-0.026611328,-0.04928589,-0.010032654,-0.004508972,-0.007549286,-0.0004954338,0.0031089783,-0.04660034,-0.0071792603,-0.01876831,0.0038986206,0.02670288,0.014976501,0.017410278,-0.0010299683,0.0031833649,-0.0045394897,0.004634857,-0.040252686,0.028015137,0.011398315,0.00012743473,0.009742737,0.04916382,0.0021152496,-0.020904541,0.0031661987,0.0019197464,0.012451172,-0.013168335,0.0010118484,-0.020828247,-0.0028743744,-0.018356323,-0.017959595,-0.0473938,0.0031337738,0.08673096,-0.0063476562,0.00018024445,-0.008354187,-0.013465881,0.026382446,0.032440186,-0.033416748,-0.015914917,-0.027420044,0.018234253,-0.016815186,0.016815186,0.0039482117,0.011100769,-0.019958496,-0.06414795,-0.013160706,0.003583908,-0.017974854,-0.06555176,-0.01727295,-0.06817627,-0.005722046,0.000034451485,-0.04156494,0.0020599365,0.008796692,-0.01158905,-0.07751465,0.010757446,0.059692383,0.011238098,0.021453857,-0.0073623657,0.022506714,0.024612427,-0.040985107,-0.031066895,0.03237915,-0.032409668,-0.016677856,-0.03237915,0.023605347,-0.01876831,-0.015411377,0.008354187,0.01109314,0.021377563,-0.0015792847,0.0052757263,-0.020935059,0.014282227,-0.010284424,0.030548096,-0.01360321,-0.003818512,0.034118652,-0.04071045,0.01953125,0.013221741,-0.0007658005,-0.006126404,0.026855469,0.037597656,-0.04296875,-0.005115509,0.029800415,0.016403198,0.0501709,-0.028640747,0.049346924,0.02583313,-0.022567749,0.028213501,-0.011123657,-0.024047852,-0.056793213,-0.019683838,0.012702942,-0.0071258545,0.022338867,-0.021942139,0.008613586,0.012008667,-0.00932312,0.016479492,-0.025177002,-0.024124146,-0.034118652,0.0034332275,-0.0015449524,-0.008399963,-0.007637024,0.03086853,0.026748657,0.042419434,0.0041007996,-0.00374794,0.019210815,0.019332886,-0.008277893,0.008880615,0.019592285,0.0010223389,0.009422302,0.013069153,-0.00049591064,-0.054534912,-0.008674622,-0.026275635,-0.0041007996,0.0042686462,0.0071258545,-0.0023670197,-0.0010671616,-0.012809753,-0.00095653534,-0.03036499,0.018920898,-0.023010254,-0.030227661,-0.010238647,-0.013137817,0.008583069,-0.0017547607,0.006500244,0.017333984,-0.0009713173,0.05166626,-0.0032787323,0.00048708916,0.019073486,0.046325684,0.020477295,-0.017974854,-0.013679504,-0.00970459,0.01259613,0.0039749146,-0.033081055,0.01953125,0.04171753,-0.018005371,0.0074768066,0.0059165955,0.034332275,-0.0024585724,0.0068244934,-0.00029349327,0.024551392,-0.021270752,0.034362793,-0.038879395,0.0015773773,0.0128479,0.008728027,0.0011091232,-0.01651001,-0.029418945,0.010482788,0.0028705597,-0.008102417,0.057495117,-0.004634857,0.03012085,-0.022262573,-0.026672363,0.008476257,-0.026611328,-0.019973755,0.033416748,0.0032634735,0.0021800995,0.019256592,-0.015838623,0.037902832,-0.029418945,0.015541077,0.011787415,-0.009590149,-0.021820068,-0.017852783,-0.018661499,-0.00504303,-0.0019359589,0.002538681,-0.013137817,0.045013428,0.0067481995,0.032440186,0.033172607,0.019241333,0.011268616,-0.041015625,-0.03164673,-0.0060806274,-0.014602661,0.01727295,-0.017669678,0.034332275,0.043426514,0.0030021667,0.034973145,0.0340271,0.019714355,0.006187439,0.004386902,-0.010406494,0.020523071,-0.005809784,0.016174316,0.0060310364,0.042175293,-0.027770996,0.023406982,0.017471313,0.028457642,-0.026657104,0.047851562,0.06933594,0.022399902,0.0028438568,0.04284668,-0.0036811829,-0.016082764,-0.0051651,-0.008056641,0.05960083,0.003774643,0.051879883,0.039855957,0.018157959,-0.0011997223,0.038208008,-0.032714844,-0.034362793,0.074401855,0.02456665,-0.03164673,-0.012420654,-0.016052246,-0.0016078949,-0.04220581,-0.03262329,0.020355225,0.006500244,0.011520386,-0.0047340393,-0.0006184578,-0.0075302124,0.010238647,0.010261536,-0.0043678284,-0.010040283,0.026062012,0.03643799,-0.0014371872,0.024398804,0.00015497208,0.040649414,-0.023117065,-0.017211914,0.01737976,0.016067505,-0.0007634163,-0.006008148,0.007858276,0.013847351,0.04736328,0.049560547,-0.027191162,0.014518738,0.025299072,0.012214661,0.0043525696,0.037841797,0.03137207,0.009239197,0.028717041,0.044647217,0.026855469,-0.030303955,0.011512756,-0.008468628,-0.008987427,-0.0043945312,-0.0116119385,0.004096985,-0.01965332,0.015007019,-0.008399963,-0.003162384,0.024520874,0.030166626,0.008338928,0.0015859604,-0.011817932,0.004421234,-0.01727295,0.001241684,0.022216797,-0.007865906,0.018081665,0.013519287,0.02720642,-0.020751953,0.03375244,-0.007888794,-0.034240723,0.004470825,0.010192871,-0.04397583,-0.009552002,-0.0060691833,0.008583069,-0.050689697,0.007118225,0.031311035,-0.005344391,0.03164673,0.011909485,0.0022792816,-0.012962341,0.022613525,0.011833191,-0.008010864,-0.009246826,-0.018295288,0.025146484,0.030761719,0.00074768066,0.020477295,-0.021057129,-0.00070381165,0.0060310364,0.008995056,0.0071411133,-0.015235901,-0.017440796,-0.031585693,0.007106781,0.03665161,0.01878357,0.040527344,-0.008552551,-0.012802124,0.005794525,0.02619934,0.004798889,0.0055618286,-0.013175964,0.033721924,-0.014457703,0.047821045,0.0340271,0.0006737709,0.018493652,-0.015686035,-0.029556274,0.020629883,0.00026512146,0.015396118,-0.015007019,0.015487671,-0.008560181,0.022415161,-0.018188477,-0.046203613,0.0046920776,-0.012908936,-0.021224976,-0.020965576,0.01486969,0.0009775162,0.015960693,0.031433105,0.0050964355,-0.033599854,0.06616211,-0.01576233,0.04650879,-0.016281128,0.00036215782,0.0496521,0.033081055,0.033569336,0.011833191,0.021347046,-0.035369873,0.02507019,0.03274536,0.024475098,0.009407043,0.012001038,-0.013832092,0.035247803,0.010749817,0.025558472,-0.0034999847,-0.0023880005,0.018188477,-0.0049476624,-0.0129776,-0.003458023,-0.015686035,0.011367798,0.03591919,-0.027999878,-0.013320923,-0.020370483,-0.018203735,0.03414917,-0.0033302307,0.0066566467,0.0087890625,-0.030960083,0.015556335,-0.020645142,-0.016479492,0.0052337646,0.031082153,-0.037506104,-0.0129776,0.0076828003,0.016036987,-0.015220642,0.024459839,0.0289917,0.0043182373,0.00623703,0.04119873,0.0011854172,0.040649414,0.0012054443,0.014549255,0.034332275,-0.004463196,-0.021072388,0.012748718,0.020370483,-0.00982666,0.0006990433,0.038909912,-0.0064582825,0.00409317,0.003698349,-0.0059051514,0.0067863464,0.015586853,0.0024414062,0.0042915344,-0.0041770935,-0.018951416,-0.0008916855,-0.0009303093,0.005584717,0.0038013458,-0.011474609,-0.009559631,0.010383606,0.035461426,0.023880005,-0.031463623,0.007949829,0.017364502,0.0076522827,-0.020202637,-0.01828003,-0.009849548,-0.030899048,0.021377563,0.015991211,0.0035533905,0.019363403,-0.017959595,-0.0004811287,0.026229858,0.016433716,0.0036716461,-0.003818512,-0.009223938,0.017166138,-0.017959595,-0.0031700134,-0.011360168,-0.0046539307,0.004699707,0.013168335,-0.00818634,-0.030715942,0.030014038,-0.0020046234,0.012413025,0.0050354004,-0.020019531,0.012283325,-0.01184082,-0.011695862,-0.005012512,0.010978699,-0.015197754,-0.021697998,-0.010192871,0.02822876,0.0513916,-0.0051116943,-0.011482239,0.018554688,0.008384705,0.02281189,0.029251099,0.010009766,0.03173828,0.020706177,-0.018981934,-0.027297974,0.019927979,-0.02458191,-0.033416748,0.015342712,-0.0110321045,-0.013458252,0.013687134,-0.0019607544,-0.004261017,-0.028182983,-0.018188477,-0.009239197,-0.01828003,0.03213501,-0.00762558,0.008300781,-0.019973755,-0.016784668,0.012916565,-0.024810791,-0.048034668,-0.02267456,-0.0045433044,-0.01979065,-0.052764893,0.025039673,-0.032806396,0.026626587,-0.027328491,0.004585266,-0.0058670044,0.032287598,-0.012199402,-0.000046133995,0.0077056885,0.022521973,0.015197754,0.017623901,0.01965332,-0.023880005,-0.04458618,-0.022720337,-0.0032253265,-0.005794525,0.022201538,0.00415802,0.036376953,0.012435913,-0.007232666,-0.00058698654,-0.011856079,-0.006717682,-0.005466461,-0.018234253,-0.018051147,0.008460999,0.020004272,-0.006931305,-0.006225586,0.043762207,-0.020904541,-0.025970459,0.027328491,0.052856445,0.0107421875,0.039978027,-0.018005371,-0.0043144226,-0.010414124,0.0047073364,-0.014533997,0.0029029846,0.005268097,0.0021457672,-0.0041236877,-0.00374794,0.022155762,-0.012176514,-0.0046920776,0.024154663,0.0048828125,-0.015045166,0.02571106,0.0093307495,0.0070724487,-0.008766174,-0.0113220215,0.015151978,0.050872803,0.018188477,0.0032157898,-0.004119873,0.010177612,-0.022476196,0.011436462,0.0115356445,-0.02268982,-0.030258179,-0.020736694,-0.032073975,0.0234375,-0.0044937134,0.017623901,-0.0020141602,0.028045654,-0.012237549,-0.021911621,-0.023544312,0.018981934,0.01083374,-0.017471313,-0.009605408,0.003227234,0.026184082,-0.026779175,-0.0037879944,-0.034576416,-0.022567749,-0.0110321045,-0.023330688,0.024627686,0.015434265,-0.0019397736,0.00050497055,-0.0007915497,-0.0037994385,0.0025196075,0.018203735,-0.010467529,-0.0021381378,0.011711121,0.0047569275,-0.034240723,0.0141067505,0.0029029846,-0.0011539459,0.008621216,-0.013877869,0.012016296,-0.009780884,0.036346436,0.0075302124,0.00049352646,0.034118652,0.0019798279,0.021957397,-0.035461426,0.018585205,-0.00072717667,-0.009529114,0.04284668,-0.028747559,-0.020904541,0.011886597,-0.01651001,-0.03842163,0.0052375793,0.023071289,0.031951904,-0.021102905,0.03414917,-0.007381439,-0.013069153,0.01373291,0.026824951,-0.00299263,0.000065624714,0.024536133,0.004917145,-0.010757446,0.0020771027,-0.00573349,-0.026611328,-0.016143799,0.023010254,-0.0137786865,-0.015655518,0.01864624,0.0057792664,0.0395813,0.00070142746,0.017059326,0.0178833,0.004737854,0.02279663,0.017959595,0.04953003,-0.008705139,-0.029663086,0.0072135925,-0.004234314,-0.021240234,-0.016677856,-0.01083374,-0.0055351257,-0.037384033,0.017410278,-0.0019550323,0.017974854,-0.024520874,0.011924744,-0.02168274,-0.009529114,-0.032470703,-0.006160736,-0.030410767,0.017959595,0.0368042,0.0018720627,0.013763428,0.015571594,-0.013259888,0.02746582,0.051879883,-0.0002772808,-0.035247803,-0.013458252,0.010803223,0.0025634766,-0.0029029846,0.00844574,-0.029037476,-0.01928711,0.0068969727,-0.0137786865,0.016815186,-0.005519867,0.010848999,0.0033454895,-0.00289917,0.0013046265,0.013771057,-0.007282257,0.0051727295,0.009185791,0.0057258606,0.031402588,0.025482178,-0.005329132,0.015594482,0.02418518,-0.0345459,0.045074463,-0.015945435,0.018310547,-0.024932861,0.008865356,-0.034179688,-0.019165039,0.0053749084,-0.0010871887],"createdAt":"2026-04-18T18:51:51.131Z","updatedAt":"2026-04-23T08:01:37.249Z","lastSeenAt":"2026-04-23T08:01:37.249Z","tsv":"'/api':173 '/api/v1/policies/23':51,202 '/call':13,28 '/docs':171 '/pricing':172 '/readme':175 '0.02':12,27,85,163 '000':80 '0x8335':72 '20':79 '2913':73 '402':213 '6':90 'Base network API' 'USDC micropayment API' 'accept':59 'access':7,22,57,228 'across':122 'actual':204 'ai':132 'amount':77 'analysi':136 'analyt':126 'api':6,21,40,56,93,227 'attach':104 'base':9,24,67,81 'base-network' 'beyond':230 'broader':117 'caller':102 'categori':124 'challeng':215 'classif':139 'collect':34 'commit':99 'connect':181 'content':187 'contract':71 'convers':156 'crypto-paid API' 'data':125,129,223 'decim':91 'descript':198 'document':166,218 'embed':140 'endpoint':41,50,121,159,203,207 'equal':84 'estim':150 'exampl':195 'exchang':145 'export':130 'extrem':168 'feed':144 'financ':141 'four':123 'function':225 'gas':149 'gate':42 'generat':157 'generic':232 'geocod':154 'header':109 'host':32 'http-post' 'infrastructur':152 'insight':131 'key':94 'label':233 'learn':134 'limit':96 'list':53 'live':209 'lowpaymentfee' 'lowpaymentfee.com':31,118 'machin':133 'maximum':76 'metric':127 'network':68 'no-api-key' 'offer':120 'openapi':191 'page':176 'pay':2,17,37 'pay-per-call API' 'pay-per-request':1,16,36 'payment':46,62,108,114 'per':3,18,38,86,164 'platform':119 'post':60 'premium':5,20,55,226 'premium API access' 'price':143,161 'prompt':183 'proof':115 'proper':212 'protocol':47 'provid':229 'quot':148 'rate':95,146 'render':178 'report':128 'request':4,19,39,61,87,165 'request/response':194 'requir':101 'return':205,210 'schema':192 'sentiment':135 'settl':64 'simpli':103 'spars':169 'specif':49 'summar':138 'text':137 'token':147 'unclear':221 'unit':82 'upfront':98 'usdc':15,30,70,88 'usdc-settlement' 'use':69,89 'util':153 'valid':112,155 'via':10,25 'wallet':182 'web3':142 'without':217 'x':107 'x-payment':106 'x402':11,26,45,113,214 'x402 API' 'x402-payment'","prices":[{"id":"e2de4c69-962a-466a-8cd0-c429167e9fe6","listingId":"d95e1ed8-e196-4c00-a000-ee0c2d68ef1a","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/policies/23","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:51:51.131Z"}],"sources":[{"listingId":"d95e1ed8-e196-4c00-a000-ee0c2d68ef1a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/23","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:51:51.131Z","lastSeenAt":"2026-04-23T08:01:37.249Z"}],"details":{"listingId":"d95e1ed8-e196-4c00-a000-ee0c2d68ef1a","quickStartSnippet":"# 1. Send a POST to get the 402 challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/policies/23\n# Response: 402 with x402 payment challenge\n# 2. Construct an X-PAYMENT header using the challenge details\n#    (pay 20000 base units = $0.02 USDC on Base to 0x1A2B...85F3)\n# 3. Replay the POST with the payment proof header\ncurl -X POST https://lowpaymentfee.com/api/v1/policies/23 \\\n  -H \"X-PAYMENT: <signed-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/23"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/policies/23"}],"useCases":["Accessing premium API data without signing up for an account or obtaining API keys","Making one-off paid API calls settled instantly on Base L2 in USDC","Integrating pay-per-request endpoints into autonomous agent workflows"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.943Z"},"updatedAt":"2026-04-23T08:01:37.249Z"}}