{"id":"2193c14a-00e3-4ff0-8476-afb3550798ca","shortId":"6rTTzB","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API platform that gates access to a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint `/api/v1/claims/52` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme — no API keys, accounts, or rate limits are required; callers simply attach an X-PAYMENT header with a valid payment proof.\n\nThe broader platform advertises four categories of APIs: 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 listed at the same $0.02/request price point. The endpoint probed here (`/api/v1/claims/52`) does not map directly to any of the advertised categories, so its exact functionality is unclear — it may be a claims-related or generic premium endpoint.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepts POST requests settling in USDC on Base.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["api-gateway","data"],"synonyms":["x402 api","micropayment api","pay-per-request api","base usdc api","lowpaymentfee","low payment fee","402 payment api","crypto api gateway"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a wallet connect prompt with no content.","No OpenAPI or schema definition found; request and response formats are unknown.","The endpoint path /api/v1/claims/52 does not match any of the advertised API categories on the homepage; its exact functionality is unclear.","The platform lists many endpoints but none have documented input/output schemas."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/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/claims/52","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 well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/claims/52 is not explained anywhere in the crawled material. This is effectively a stub listing.","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":"2026-04-19T04:16:13.683Z","embedding":[-0.030883789,-0.0121536255,0.03527832,0.018203735,0.013961792,-0.02255249,-0.036712646,0.025253296,0.061767578,-0.070617676,0.03326416,-0.06365967,-0.017929077,-0.026031494,-0.028244019,0.01071167,-0.023666382,0.0061073303,-0.049804688,0.04458618,0.037597656,-0.01828003,-0.018936157,0.026306152,-0.008987427,-0.013130188,0.016815186,-0.0074386597,-0.024719238,-0.03463745,0.029922485,-0.027862549,-0.008850098,0.01121521,-0.011436462,-0.016479492,0.010261536,0.036102295,0.027648926,-0.0030956268,0.0006222725,-0.0423584,0.016342163,-0.009216309,-0.05871582,0.0029029846,0.036834717,-0.016906738,-0.017990112,-0.014976501,-0.034118652,-0.023605347,-0.017456055,0.018218994,0.01979065,0.023880005,-0.008239746,-0.004447937,0.016677856,0.0067596436,-0.01285553,-0.053375244,-0.006526947,0.001832962,0.015174866,0.05307007,-0.006164551,0.052856445,0.017333984,0.05670166,0.03604126,0.04446411,0.02229309,0.0072746277,0.00274086,-0.028060913,-0.0019111633,0.061065674,-0.024993896,-0.008781433,-0.027313232,-0.012229919,-0.049957275,-0.016204834,-0.012756348,-0.06842041,-0.015266418,0.014945984,-0.042663574,0.036346436,-0.07043457,-0.0028495789,-0.0045928955,-0.0034046173,0.0016918182,-0.008628845,0.00028419495,0.025863647,0.0049591064,0.007785797,0.011642456,-0.06100464,0.02659607,0.0043754578,0.058624268,0.038513184,0.008674622,0.028640747,0.017868042,-0.01713562,-0.016159058,0.007835388,-0.020858765,-0.0064315796,0.0043945312,0.0063171387,-0.019012451,0.025299072,-0.018478394,0.019699097,-0.06561279,0.05114746,0.012496948,-0.0067825317,0.004070282,-0.039886475,-0.0009794235,0.0050468445,-0.047332764,-0.011558533,0.015930176,0.01663208,0.028320312,-0.01876831,-0.041778564,0.0061531067,-0.01802063,-0.03100586,-0.044128418,-0.015808105,0.035827637,-0.034729004,0.013504028,0.026321411,-0.09979248,-0.0008740425,-0.041229248,0.023117065,-0.01953125,-0.01171875,0.024780273,0.031463623,-0.025054932,-0.009841919,-0.030639648,-0.027313232,-0.017105103,0.038085938,-0.000600338,0.029953003,-0.007713318,0.022476196,0.024017334,0.010643005,0.013389587,0.032318115,0.000059604645,-0.08337402,-0.08880615,-0.0435791,-0.006591797,-0.005683899,-0.035736084,0.0038337708,-0.0065841675,-0.0791626,-0.017181396,-0.026687622,0.0052490234,-0.055480957,-0.013961792,-0.02406311,0.0084991455,-0.024642944,-0.067871094,-0.021881104,-0.012367249,0.062805176,0.020019531,0.012626648,0.01184845,-0.007896423,0.06149292,0.015281677,-0.017227173,-0.036987305,0.011413574,-0.0027751923,0.049316406,0.0158844,0.021148682,-0.04058838,0.04473877,0.060302734,0.012321472,-0.021697998,0.006919861,-0.053131104,-0.046966553,-0.02859497,0.0059776306,-0.0063438416,-0.011932373,0.019256592,-0.020935059,-0.029037476,-0.000117599964,0.006614685,0.02696228,0.07147217,0.01084137,0.016571045,0.014572144,0.015960693,-0.038024902,0.047790527,0.027389526,0.023345947,-0.012161255,-0.022994995,0.021636963,0.034698486,-0.036468506,0.008071899,-0.027709961,0.019638062,-0.0000718236,0.0061073303,0.034484863,-0.019683838,-0.013549805,-0.027313232,-0.020202637,0.021881104,0.009315491,-0.04373169,-0.045898438,-0.0680542,0.029647827,0.046142578,0.024917603,0.014091492,0.0028972626,-0.016433716,-0.00868988,-0.076416016,0.039123535,0.062683105,-0.01007843,-0.01625061,0.041625977,-0.019744873,-0.03692627,-0.011390686,-0.01727295,-0.022338867,-0.027740479,0.014389038,-0.03744507,-0.000043332577,0.021881104,0.04510498,0.051574707,-0.01638794,-0.037139893,-0.021942139,-0.00063991547,-0.0027046204,-0.02835083,0.00026750565,-0.0052223206,0.024139404,0.034973145,0.012077332,0.027816772,0.0060539246,0.010215759,-0.021224976,-0.0061073303,-0.01651001,-0.040771484,0.02067566,-0.0014972687,-0.055908203,0.0019702911,0.009727478,0.07165527,-0.04510498,0.035583496,-0.015014648,0.022750854,0.062347412,-0.01777649,-0.04034424,-0.007095337,0.020996094,0.034362793,0.03302002,0.013168335,0.00035309792,-0.030639648,0.039611816,-0.015808105,-0.004234314,0.013748169,0.020584106,0.040924072,0.008361816,-0.056915283,-0.03768921,-0.017730713,-0.030578613,0.040374756,-0.024291992,0.02583313,-0.0042304993,0.012741089,-0.029754639,0.0065994263,-0.035247803,0.013618469,-0.01576233,-0.013061523,-0.014480591,-0.02734375,0.003068924,0.022232056,-0.008010864,0.004550934,0.04486084,0.022659302,-0.019180298,-0.031066895,-0.021911621,-0.031341553,-0.003353119,0.01309967,0.019866943,0.027236938,0.034088135,-0.034484863,0.00044369698,0.007850647,0.019638062,0.017730713,0.0022125244,0.00012814999,-0.06707764,-0.06738281,-0.022338867,-0.037109375,0.021316528,0.01953125,0.013069153,0.04159546,0.00349617,-0.01550293,-0.03366089,0.024459839,-0.021636963,0.0065460205,0.045562744,-0.03111267,-0.05102539,-0.0004069805,0.0024318695,-0.0030555725,0.038757324,0.013023376,0.0038795471,0.07208252,0.026611328,0.018463135,0.008674622,0.0058670044,0.016357422,-0.01537323,-0.0077209473,-0.03918457,-0.009895325,0.022766113,-0.024215698,-0.035827637,-0.068115234,0.055725098,0.025375366,0.0725708,0.0012922287,0.016326904,0.034942627,-0.020736694,0.0079574585,-0.03955078,-0.029251099,-0.032806396,-0.046936035,0.03010559,-0.0034809113,-0.013977051,-0.03164673,0.02166748,-0.006954193,0.014503479,-0.025161743,0.04727173,-0.016113281,-0.008552551,0.019500732,0.0018196106,0.06262207,0.062805176,-0.048828125,0.010871887,0.027191162,-0.015686035,-0.0056266785,0.03817749,-0.009170532,-0.011940002,-0.07409668,-0.038024902,-0.015411377,-0.015075684,-0.05722046,0.0004954338,-0.0060920715,0.028900146,0.006954193,-0.00472641,-0.008132935,0.006565094,-0.014549255,-0.05935669,-0.01675415,-0.047821045,0.008018494,0.027557373,-0.043640137,0.00919342,-0.012817383,0.001335144,-0.0050964355,0.0056114197,0.006504059,-0.0044136047,-0.05657959,0.039611816,0.009033203,-0.0005016327,0.016448975,0.034484863,0.037384033,0.011764526,0.039916992,0.011070251,-0.019256592,-0.057006836,0.021362305,-0.051574707,-0.0017251968,-0.0013341904,-0.021011353,0.0037269592,-0.011795044,-0.024932861,-0.0044403076,0.0038261414,-0.030029297,0.011955261,0.011688232,-0.035614014,-0.0289917,-0.045135498,-0.01777649,0.002357483,0.06726074,0.01687622,-0.0010128021,-0.050567627,-0.0146102905,0.020645142,-0.006626129,0.02420044,-0.015266418,-0.014038086,-0.018630981,-0.030715942,-0.009750366,-0.02848816,0.034484863,-0.0049057007,-0.0019931793,0.027999878,0.003162384,0.014190674,-0.0029296875,-0.0041656494,0.029220581,-0.026123047,-0.017074585,-0.03604126,0.009742737,0.007232666,0.00059604645,-0.03466797,0.06695557,0.014816284,0.04284668,-0.04034424,0.008842468,-0.0040626526,0.022354126,0.017868042,-0.024215698,-0.02267456,0.0060043335,-0.048919678,-0.06402588,0.027175903,-0.009086609,0.018096924,0.006839752,0.008972168,0.042266846,-0.025985718,0.017440796,0.026519775,-0.038360596,-0.002067566,-0.019561768,-0.036376953,-0.021957397,0.007572174,-0.021438599,0.023635864,-0.01701355,0.007835388,-0.019104004,-0.024215698,0.043640137,0.021331787,-0.0062446594,0.02986145,0.012451172,0.011703491,0.04107666,0.021560669,-0.027175903,0.031585693,-0.005176544,0.014518738,-0.007686615,0.040039062,0.03100586,-0.019943237,-0.0050582886,-0.007698059,-0.012123108,-0.0044059753,-0.0095825195,0.014625549,0.01675415,0.00046157837,-0.040863037,0.034179688,0.016464233,-0.017044067,-0.023910522,0.016113281,0.010276794,-0.04647827,0.021820068,0.020065308,0.05407715,-0.018630981,0.0023555756,0.005268097,0.02999878,0.029220581,0.012214661,-0.00073099136,0.010498047,-0.030960083,0.007698059,0.0031757355,-0.01713562,0.01663208,-0.0025291443,0.02583313,0.033843994,0.022644043,-0.0209198,-0.027450562,0.007888794,-0.012741089,-0.012771606,0.033355713,0.017807007,0.03189087,-0.023605347,0.032440186,0.025360107,-0.037017822,-0.0072784424,0.0011053085,0.040039062,-0.017349243,-0.0051498413,0.026916504,-0.006134033,0.021697998,-0.0546875,0.009803772,0.0048065186,0.019683838,-0.012527466,-0.045806885,-0.039398193,-0.018066406,0.031555176,0.0023078918,0.016586304,0.028747559,0.011772156,0.0008673668,0.013000488,-0.010650635,-0.0027503967,-0.0025978088,-0.050598145,-0.0231781,-0.010215759,-0.0067825317,-0.026824951,0.014404297,-0.026641846,-0.042907715,0.004055023,-0.010620117,0.0016336441,-0.004295349,0.008102417,0.028701782,0.008102417,0.015930176,-0.018051147,-0.021636963,0.0025367737,0.009162903,0.021835327,-0.046325684,0.012283325,-0.00207901,-0.0069465637,-0.009277344,0.024093628,0.02192688,0.025009155,0.0020656586,0.037902832,-0.044555664,0.029968262,-0.019821167,0.0073547363,0.008514404,-0.03074646,-0.013465881,-0.030578613,-0.019500732,0.04660034,-0.027709961,-0.008415222,-0.02760315,-0.035095215,-0.015052795,-0.05505371,0.011062622,0.038238525,0.045654297,-0.03781128,0.0051651,0.01777649,0.00459671,-0.021148682,-0.007537842,-0.0014724731,0.0309906,0.015823364,0.005367279,-0.026397705,-0.020309448,0.009086609,0.0062294006,-0.060272217,-0.050079346,-0.015914917,0.014984131,0.0062217712,-0.0013360977,-0.021957397,-0.027313232,-0.009475708,-0.024810791,0.007205963,-0.0018320084,0.023239136,0.011260986,-0.032470703,-0.0009813309,0.026611328,-0.024093628,0.025222778,-0.009971619,-0.018081665,-0.04525757,0.021621704,0.03955078,0.016830444,0.0056419373,-0.03111267,0.001496315,-0.020935059,-0.05706787,0.0006608963,-0.006462097,0.01525116,0.005138397,-0.008277893,-0.048187256,-0.016342163,-0.020904541,-0.0052871704,0.019760132,0.010253906,0.0000666976,0.0035934448,0.005191803,-0.0031719208,-0.009613037,-0.022094727,0.016845703,0.011146545,0.0009455681,0.01449585,0.036621094,0.0063476562,-0.0236969,-0.00299263,0.0014028549,0.020874023,-0.028030396,0.007972717,-0.014122009,0.018066406,-0.008201599,-0.014053345,-0.026687622,0.002439499,0.07019043,-0.0005803108,0.027633667,-0.011695862,-0.012489319,0.027236938,0.047729492,-0.04083252,-0.0075645447,-0.04611206,0.018585205,-0.01713562,0.020629883,-0.0072402954,0.021896362,-0.018463135,-0.057495117,0.003856659,0.012031555,0.010108948,-0.0680542,-0.019882202,-0.06915283,0.007106781,-0.01828003,-0.024841309,0.0037631989,0.006351471,-0.025436401,-0.08001709,0.0067596436,0.05871582,0.003829956,0.023330688,-0.0067443848,0.027359009,0.023742676,-0.022659302,-0.006336212,0.02519226,-0.022216797,-0.019897461,-0.021087646,0.041290283,-0.010124207,-0.030258179,0.017242432,0.029220581,0.024414062,-0.011329651,0.019592285,-0.0063667297,0.0090789795,-0.0069732666,0.010597229,-0.0008158684,-0.011154175,0.035858154,-0.05822754,0.030792236,0.030715942,0.0059547424,0.0017204285,0.033599854,0.045440674,-0.04434204,-0.013534546,0.030670166,0.02067566,0.044555664,-0.015792847,0.028076172,0.020431519,-0.0059776306,0.008621216,-0.00919342,-0.024612427,-0.03262329,-0.03265381,0.024520874,0.012008667,0.012008667,-0.010185242,-0.0013971329,0.030960083,0.011741638,0.00057935715,-0.026321411,-0.004470825,-0.0152282715,0.007820129,0.010940552,0.009994507,0.003616333,0.019226074,0.03704834,0.04272461,0.012290955,-0.010131836,0.015266418,0.021606445,-0.014373779,0.00065612793,0.0070266724,0.023345947,0.01449585,0.025512695,0.013824463,-0.031219482,-0.014984131,-0.013183594,-0.013656616,0.007068634,-0.007160187,0.00076818466,0.004295349,0.005760193,-0.004360199,-0.041778564,0.0032444,-0.030853271,-0.0256958,-0.011100769,-0.018035889,0.016601562,0.01777649,-0.008049011,0.008346558,0.0049972534,0.04660034,-0.0020484924,-0.004470825,0.03543091,0.03744507,0.020706177,-0.025894165,0.0036296844,-0.012992859,-0.0040740967,0.00944519,-0.01965332,0.0029678345,0.039855957,-0.013183594,-0.0005927086,0.004524231,0.026290894,-0.001783371,0.008399963,-0.003768921,0.025222778,-0.013206482,0.035980225,-0.047790527,0.006252289,0.025665283,0.006965637,-0.007835388,-0.0135650635,-0.026550293,0.012496948,0.0031223297,0.0025863647,0.04928589,-0.004184723,0.02078247,-0.030136108,-0.01838684,-0.009300232,-0.012786865,-0.024978638,0.021911621,-0.004310608,-0.0035266876,0.004600525,-0.036193848,0.029968262,-0.04345703,0.0029354095,0.0015449524,0.0030765533,-0.009475708,-0.019729614,-0.0046424866,-0.016906738,-0.01701355,0.007896423,-0.007408142,0.04458618,0.021270752,0.029220581,0.02722168,0.023071289,0.0033874512,-0.045715332,-0.029067993,0.005039215,-0.028671265,0.016677856,-0.0335083,0.04660034,0.03967285,0.011299133,0.032226562,0.04989624,0.034240723,0.015052795,0.013786316,-0.021011353,0.023910522,-0.01713562,0.022338867,-0.010238647,0.050476074,-0.027786255,0.013206482,-0.014465332,0.0135650635,-0.009269714,0.029678345,0.07537842,0.032043457,-0.012260437,0.032409668,-0.004711151,-0.014930725,-0.013572693,-0.026321411,0.05392456,0.0043907166,0.03692627,0.036254883,0.006603241,0.00034332275,0.029006958,-0.02293396,-0.02482605,0.050872803,0.021820068,-0.027130127,-0.01574707,-0.00762558,0.010284424,-0.046569824,-0.012565613,0.024215698,-0.0013313293,0.00869751,-0.010177612,0.0015268326,-0.010131836,0.009651184,0.011627197,0.010681152,-0.0017032623,0.01638794,0.011245728,0.011665344,0.027755737,0.0063323975,0.024368286,-0.033233643,-0.015037537,0.004676819,0.010925293,0.0051956177,-0.005306244,0.022354126,0.014976501,0.05114746,0.032287598,-0.02734375,-0.0028038025,0.013160706,0.02331543,0.012939453,0.049224854,0.019317627,0.013748169,0.029251099,0.051116943,0.0119018555,-0.032806396,0.030685425,-0.0065727234,0.013977051,-0.009864807,-0.019073486,0.015090942,-0.011314392,0.01737976,0.0041007996,-0.004299164,0.025756836,0.02255249,-0.0007843971,0.0018720627,-0.014816284,0.02067566,-0.015991211,0.0043144226,0.013618469,-0.023483276,0.017166138,0.01133728,0.034576416,-0.028778076,0.032409668,-0.0029582977,-0.02128601,-0.0028877258,0.01424408,-0.031066895,-0.011779785,0.010955811,-0.018661499,-0.041625977,0.018692017,0.020019531,-0.015090942,0.025970459,0.0044136047,-0.007881165,-0.0058937073,0.027816772,0.014907837,-0.0007457733,-0.010108948,-0.006580353,0.037384033,0.044891357,-0.0012016296,-0.007686615,-0.027923584,0.010032654,0.017166138,-0.0007443428,-0.00012767315,0.0021419525,-0.0049743652,-0.033111572,0.014518738,0.03137207,0.018722534,0.03744507,-0.012649536,-0.015411377,-0.00018882751,0.024978638,0.008049011,0.004550934,-0.0025043488,0.023956299,-0.026763916,0.036712646,0.030151367,-0.00042438507,0.022827148,-0.007686615,-0.010726929,0.007472992,-0.01802063,0.031066895,-0.019088745,0.025314331,-0.0084991455,0.020950317,-0.018478394,-0.051635742,0.014137268,-0.013015747,-0.017059326,-0.028076172,0.0184021,0.0068626404,0.021072388,0.025802612,0.029891968,-0.035736084,0.07128906,-0.018875122,0.048797607,-0.013160706,0.0065574646,0.057647705,0.029968262,0.04663086,0.009819031,0.00843811,-0.02053833,0.018692017,0.035858154,0.027648926,0.013587952,-0.0041046143,-0.030075073,0.029891968,-0.008674622,0.039886475,-0.0030918121,-0.009269714,0.019714355,-0.0034694672,-0.012390137,-0.0020999908,-0.0045166016,0.009429932,0.052825928,-0.028381348,-0.0095825195,-0.010536194,-0.014389038,0.02835083,-0.0079574585,0.008255005,-0.0042037964,-0.023910522,0.013313293,-0.027175903,-0.0119018555,0.012763977,0.025344849,-0.052520752,-0.013389587,0.0068473816,0.018356323,-0.030151367,0.0362854,0.031707764,0.0025959015,0.015052795,0.034484863,-0.006980896,0.036956787,-0.0067596436,0.025299072,0.05001831,0.010887146,-0.011619568,0.0063056946,0.004283905,-0.012535095,0.008644104,0.021713257,-0.003736496,0.00762558,0.006286621,-0.007671356,0.012031555,0.008430481,-0.012268066,0.002861023,-0.0018844604,-0.011428833,-0.0012731552,0.009796143,0.0032444,0.010978699,-0.0023784637,-0.017700195,0.015014648,0.03111267,0.022277832,-0.038024902,0.006023407,0.027496338,0.004383087,-0.03253174,-0.012435913,-0.008522034,-0.028427124,0.0070610046,0.037506104,0.012527466,0.014015198,-0.028747559,0.0007839203,0.039733887,0.016784668,0.018356323,0.0013561249,-0.013130188,0.009559631,-0.02911377,0.0016241074,-0.017654419,-0.015808105,0.012023926,0.016799927,-0.006340027,-0.017974854,0.026535034,0.0012264252,0.008987427,0.0010137558,-0.0063934326,0.028320312,-0.004699707,0.00459671,0.0015659332,0.017669678,-0.006336212,-0.022140503,-0.028381348,0.033935547,0.059509277,-0.011703491,-0.0025196075,0.010948181,0.017547607,0.016296387,0.038848877,0.004386902,0.046813965,0.026000977,-0.02116394,-0.031036377,0.011192322,-0.01486969,-0.03060913,0.025985718,-0.022888184,-0.014572144,0.0110321045,-0.0010185242,0.0062179565,-0.032196045,-0.020462036,-0.005104065,-0.014907837,0.021636963,-0.0027275085,0.017593384,-0.038330078,-0.015106201,0.012191772,-0.016830444,-0.038238525,-0.024398804,-0.012268066,-0.018112183,-0.053833008,0.017089844,-0.028320312,0.011276245,-0.023406982,0.014335632,-0.0028457642,0.028533936,-0.0076065063,-0.0011978149,0.01525116,0.02796936,0.0018548965,0.008354187,0.020690918,-0.010215759,-0.030715942,-0.012359619,-0.003036499,-0.010650635,0.014984131,-0.0115356445,0.0385437,0.004310608,-0.021530151,0.0022201538,-0.015022278,-0.007713318,0.0016546249,-0.020263672,-0.018539429,0.018951416,0.017745972,-0.017837524,-0.0129852295,0.040527344,-0.020950317,-0.016937256,0.02243042,0.033203125,0.018447876,0.041137695,-0.0059280396,0.003156662,-0.02609253,0.013519287,-0.010322571,0.013198853,-0.001663208,-0.0044441223,-0.007133484,0.0072021484,0.018203735,-0.0012559891,0.001455307,0.016494751,0.017456055,-0.0060272217,0.03024292,0.011985779,0.008842468,-0.021743774,-0.009918213,0.026062012,0.057800293,0.013671875,0.007545471,-0.007507324,0.014877319,-0.015602112,0.0073928833,0.009841919,-0.025619507,-0.038391113,-0.00970459,-0.029220581,0.025817871,-0.0033607483,0.0011034012,-0.012451172,0.019836426,-0.0007529259,-0.037231445,-0.007411957,0.024856567,0.012588501,-0.01675415,-0.008674622,0.0058403015,0.017318726,-0.030899048,0.00055122375,-0.040039062,-0.03074646,-0.012313843,-0.0231781,0.029968262,0.0023765564,-0.019729614,0.004512787,-0.0044403076,-0.004837036,0.019073486,0.031402588,-0.0099487305,-0.009246826,0.014190674,0.028060913,-0.013931274,0.01651001,-0.016799927,-0.009941101,0.013870239,-0.006175995,0.018508911,-0.02645874,0.023269653,0.006340027,-0.0016956329,0.030044556,0.002298355,0.02859497,-0.02015686,0.00198555,-0.009033203,-0.011314392,0.021102905,-0.0075645447,-0.024139404,-0.00040221214,-0.0071868896,-0.035217285,0.008453369,0.027923584,0.029525757,-0.010040283,0.047424316,-0.017059326,-0.0030956268,0.0069618225,0.018692017,-0.005088806,0.009597778,0.022857666,-0.005355835,0.014533997,-0.0057411194,-0.013839722,-0.026504517,-0.022857666,0.013679504,-0.007347107,-0.0073928833,0.030029297,0.009460449,0.041137695,-0.0043792725,0.016830444,0.020111084,0.0052223206,0.019454956,0.0077667236,0.03515625,0.0071411133,-0.027389526,0.0069465637,0.0066871643,-0.028076172,-0.0015230179,-0.008605957,0.014640808,-0.027709961,0.003320694,-0.0049362183,0.0102005005,-0.022857666,0.016082764,-0.015213013,0.006225586,-0.03213501,0.00051546097,-0.038085938,0.0001295805,0.036987305,0.017944336,0.011520386,0.0070610046,-0.024841309,0.03704834,0.051574707,0.008468628,-0.027786255,-0.012580872,0.0059776306,-0.0077667236,-0.006767273,-0.0014677048,-0.018463135,-0.0062446594,-0.012451172,-0.007843018,0.0104904175,-0.016494751,0.028823853,0.0043907166,-0.011207581,-0.01361084,0.019851685,-0.0059890747,-0.0000074505806,0.0016117096,0.005214691,0.03387451,0.04434204,-0.024505615,0.014801025,0.023452759,-0.04296875,0.049041748,0.0013771057,0.024383545,-0.02041626,0.00945282,-0.042053223,-0.013397217,-0.009712219,0.003250122],"createdAt":"2026-04-18T18:45:47.682Z","updatedAt":"2026-04-23T20:32:29.514Z","lastSeenAt":"2026-04-23T20:32:29.514Z","tsv":"'/api':208 '/api/v1/claims/52':64,173 '/docs':206 '/pricing':207 '/readme':210 '/request':17,34,166 '0.02':16,33,75,165 '000':79 '20':78 '402 payment api' '6':85 'accept':255 'access':45,70 'account':98 'advertis':120,182 'ai':10,27,132 'analysi':136 'analyt':126 'api':4,21,41,69,96,124 'attach':106 'avail':236 'base':7,24,59,80,262 'base usdc api' 'base-network' 'behind':51 'broader':118 'call':77 'caller':104 'categori':122,183 'challeng':242 'claim':195 'claims-rel':194 'classif':139 'confirm':249 'connect':216 'content':222 'convers':156 'cost':72 'crawl':239 'crypto api gateway' 'data':9,26,125,129 'decim':86 'direct':177 'document':201,231 'embed':140 'endpoint':14,31,50,63,159,170,200,251 'estim':150 'exact':93,186 'exampl':235 'exchang':145 'export':130 'extrem':203 'feed':144 'financ':11,28,141 'form':248 'four':121 'function':187 'gas':149 'gate':3,20,44 'generat':157 'generic':198 'geocod':154 'header':111 'infrastructur':152 'insight':131 'json-response' 'key':97 'learn':134 'limit':101 'list':66,161 'live':244 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':133 'made':89 'map':176 'may':191 'metric':127 'micropay':56 'micropayment api' 'network':60 'no-api-key' 'offer':8,25 'openapi':226 'oper':253 'page':211 'pay-per-request api' 'payment':87,110,115 'per':53,76 'per-request':52 'per-request-billing' 'platform':5,22,42,119 'point':168 'post':256 'post-method' 'premium':68,199 'price':143,167 'probe':171 'prompt':218 'proof':116 'protocol':40 'quot':148 'rate':100,146 'relat':196 'report':128 'request':54,257 'request/response':229 'requir':103 'return':213 'schema':230 'scheme':94 'sentiment':135 'settl':258 'simpli':105 'spars':204 'spec':227 'specif':62 'substant':221 'summar':138 'text':137 'token':147 'unclear':189 'unit':81 'usag':234 'usdc':55,83,260 'usdc-micropayment' 'util':13,30,153 'valid':114,155 'varieti':48 'via':90 'wallet':217 'web3':142 'well':247 'well-form':246 'x':109 'x-payment':108 'x402':2,19,39,92,241 'x402 api' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"65337de0-cfbc-430b-9732-e2a6c63f4a8d","listingId":"2193c14a-00e3-4ff0-8476-afb3550798ca","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/claims/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":"2026-04-18T18:45:47.682Z"}],"sources":[{"listingId":"2193c14a-00e3-4ff0-8476-afb3550798ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:47.682Z","lastSeenAt":"2026-04-23T20:32:29.514Z"}],"details":{"listingId":"2193c14a-00e3-4ff0-8476-afb3550798ca","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/52 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/52"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs in four categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/52"}],"useCases":["Accessing premium data or analytics endpoints without creating an account or managing API keys","Making one-off API calls with instant USDC micropayments on Base","Integrating pay-per-use API access into autonomous agent workflows"],"bestFor":["Developers who want keyless, pay-per-call 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 OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.525Z"},"updatedAt":"2026-04-23T20:32:29.514Z"}}