{"id":"0ad8b33e-026a-4b19-b8bc-5bfb9517fe4c","shortId":"ERnJSz","kind":"x402","title":"Pay-per-call stock data for REGN via x402 on Base, settled in USDC at $0.02/request.","tagline":"Pay-per-call stock data for REGN via x402 on Base, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides stock data for Regeneron Pharmaceuticals (ticker: REGN) through an x402-gated API. Each call costs $0.02 in USDC on the Base network — the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys or accounts are needed; payment is handled inline via the x402 protocol's X-PAYMENT header.\n\nThe provider operates a broader platform offering dozens of endpoints across data analytics, AI/ML inference, finance, crypto, and utility categories, all priced uniformly at $0.02 per request. The specific endpoint probed here (`/api/v1/stocks/REGN`) is a stock-data endpoint, though the crawled landing page does not list it explicitly among the advertised routes. The endpoint is live and returns a proper 402 challenge with x402 version 1, accepting the \"exact\" payment scheme on Base mainnet, paying to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.\n\nDocumentation is extremely thin — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available from the crawl. The output schema in the x402 challenge indicates the endpoint accepts HTTP POST and returns application/json, but the actual response structure is unknown.","tags":[],"capabilities":["stock-data","x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key","json-response"],"categories":["finance"],"synonyms":["stock price API","REGN stock data","Regeneron stock quote","x402 stock endpoint","pay-per-call stock API","crypto-paid stock data","Base USDC stock API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all render only 'Connect wallet' with no content.","The /api/v1/stocks/REGN endpoint is not listed among the advertised APIs on the landing page; its exact capabilities and response format are unknown.","No request or response schema is available; the actual data returned is unverified.","No OpenAPI specification found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/REGN","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/stocks/REGN","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, confirming pricing and payment details. However, documentation is essentially absent — no OpenAPI spec, no request/response schemas, no examples, and the /docs page is empty. The specific /stocks/REGN route is not listed on the landing page. 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":"2026-04-18T20:23:54.127Z","embedding":[0.010734558,0.007537842,0.03881836,0.010948181,0.0013971329,-0.021469116,0.02053833,0.02116394,0.044403076,-0.013534546,0.019561768,-0.023483276,-0.0025920868,-0.021011353,-0.03387451,-0.007896423,0.010604858,0.015396118,-0.07409668,0.040924072,0.03286743,-0.003030777,-0.031402588,-0.022460938,-0.02180481,0.006954193,0.01928711,-0.0027942657,0.011619568,-0.028427124,0.045806885,-0.03543091,0.002811432,-0.008361816,-0.012840271,0.0045814514,0.022384644,0.023803711,0.007801056,0.013717651,-0.008232117,-0.06530762,0.0017337799,0.015510559,-0.04776001,-0.051605225,-0.04348755,-0.044769287,0.022033691,0.009391785,-0.06488037,-0.04309082,-0.02709961,0.017440796,-0.015670776,0.03378296,0.017044067,0.023117065,-0.014854431,0.012237549,0.012939453,-0.05670166,0.0042266846,-0.027786255,-0.0025463104,0.03866577,-0.011528015,0.026763916,-0.0042152405,0.04043579,0.03945923,-0.015960693,0.0017662048,-0.0036468506,-0.02168274,0.019927979,0.024291992,-0.004135132,0.009536743,-0.018447876,0.021896362,-0.006526947,-0.046539307,-0.004508972,0.014266968,-0.047576904,-0.028076172,-0.000018119812,-0.023086548,0.05697632,-0.057800293,0.0129470825,-0.018737793,0.007904053,-0.004573822,-0.015022278,-0.016540527,-0.010192871,-0.0025749207,0.02835083,0.009986877,-0.021331787,0.025466919,-0.00422287,0.027359009,0.07348633,-0.0015363693,0.0032730103,0.0063667297,0.023803711,-0.0006155968,-0.0065078735,-0.009292603,0.003698349,0.017852783,-0.025375366,-0.05227661,0.009384155,-0.01285553,0.05795288,-0.03439331,0.016540527,0.0181427,-0.0049362183,0.0030708313,-0.023345947,-0.02557373,-0.017150879,-0.0137786865,-0.020935059,0.02357483,0.01927185,0.00014698505,-0.008468628,-0.032928467,0.007575989,0.012367249,-0.027389526,-0.023590088,-0.027511597,-0.01184845,0.011749268,-0.013961792,0.012084961,-0.09710693,-0.0007824898,-0.012252808,0.03753662,-0.051086426,0.0048713684,-0.0020771027,0.029510498,0.0002808571,-0.009384155,0.0029315948,-0.02848816,-0.012275696,0.030792236,-0.012863159,0.03253174,-0.056671143,0.07305908,0.010528564,-0.024490356,0.010131836,0.00818634,-0.013046265,-0.08795166,-0.042785645,0.012451172,0.015319824,-0.026992798,0.0043144226,-0.0051956177,-0.028869629,-0.022903442,-0.023208618,0.0209198,-0.0017719269,-0.044891357,-0.020370483,-0.044952393,0.006134033,-0.019088745,-0.0044555664,0.026916504,-0.022583008,0.0368042,0.012016296,-0.005065918,0.034576416,0.022766113,0.05886841,0.046020508,-0.021194458,-0.028915405,0.016662598,-0.025238037,0.011672974,-0.039031982,0.035736084,-0.020614624,0.027023315,0.05038452,-0.024749756,-0.018600464,-0.024230957,-0.060028076,-0.037109375,-0.020507812,0.05014038,0.004283905,-0.030380249,-0.017471313,-0.019165039,-0.016677856,-0.012619019,0.018188477,0.026412964,0.049957275,0.021331787,0.004261017,-0.025253296,0.010513306,-0.016845703,0.04244995,0.02973938,-0.0028820038,0.025146484,-0.04598999,0.01638794,0.053649902,-0.026977539,-0.002462387,-0.009765625,0.037628174,-0.010925293,-0.020553589,0.0010185242,-0.0005059242,-0.021377563,-0.0011987686,-0.03781128,0.02456665,0.008110046,-0.01889038,-0.035369873,-0.079711914,0.02394104,0.05117798,-0.0011873245,0.008041382,0.08569336,-0.03829956,-0.027252197,-0.03866577,0.0045280457,0.036102295,-0.0143966675,0.017181396,0.016220093,-0.008460999,-0.03149414,-0.008552551,-0.007873535,-0.026062012,-0.0027599335,0.010597229,-0.036621094,0.0005903244,0.013771057,-0.01965332,0.033966064,-0.014343262,-0.03543091,0.0119018555,0.00085020065,-0.0063095093,-0.016326904,-0.0066604614,-0.02420044,0.017654419,0.011428833,0.012008667,-0.005252838,0.0021972656,0.019622803,0.0025405884,0.0028800964,-0.001405716,-0.01436615,0.014526367,0.028182983,-0.057159424,0.012535095,-0.04864502,0.022598267,-0.03543091,0.042541504,-0.001745224,-0.04345703,0.06945801,-0.009300232,-0.052825928,-0.027023315,0.01235199,0.00072813034,0.017700195,-0.032287598,0.00919342,-0.014320374,0.07336426,0.03161621,-0.020645142,0.018997192,0.021560669,0.04736328,-0.025222778,-0.034332275,-0.06518555,0.02418518,-0.017593384,0.028793335,-0.005092621,0.0073432922,-0.005771637,0.0000911355,-0.033081055,0.013969421,-0.0020694733,0.0053710938,-0.026412964,-0.003396988,0.008132935,0.026412964,0.0137786865,-0.0037021637,0.008544922,0.013244629,0.039367676,0.023544312,-0.042266846,0.010238647,-0.051940918,0.009284973,-0.008621216,-0.0056915283,0.023910522,0.014968872,0.03491211,-0.04827881,0.019927979,-0.018295288,0.036895752,0.018676758,-0.013153076,0.032440186,-0.040405273,-0.0135650635,-0.033966064,-0.046295166,0.020401001,0.021377563,0.0137786865,0.054138184,-0.015991211,-0.044281006,-0.030273438,0.042907715,-0.07501221,0.027816772,0.024673462,-0.012611389,-0.0047569275,-0.032562256,0.027999878,-0.01689148,0.037261963,0.00844574,-0.0042877197,0.028533936,0.014450073,0.035339355,-0.0034809113,0.014846802,-0.0027942657,0.0014867783,-0.01424408,-0.0418396,-0.00043272972,-0.000015854836,-0.0058403015,-0.022277832,-0.07904053,0.043426514,0.060302734,0.03805542,0.015472412,0.018539429,0.034057617,-0.00092697144,-0.051361084,-0.02154541,-0.049224854,0.012397766,-0.0309906,0.030578613,0.01576233,0.031555176,-0.041046143,0.048095703,-0.008865356,0.032104492,-0.04727173,0.023651123,-0.024169922,-0.0017080307,-0.0048294067,-0.011856079,0.08050537,0.043121338,-0.06317139,0.015655518,-0.020446777,-0.024490356,-0.011222839,0.033691406,0.013832092,-0.021270752,-0.03817749,0.0066604614,0.006465912,-0.040161133,-0.040649414,0.027297974,0.037902832,0.013679504,0.021377563,0.018600464,0.0082473755,-0.008583069,0.009254456,-0.05444336,-0.008956909,-0.015655518,0.015357971,0.00907135,-0.017532349,-0.01625061,-0.027542114,-0.04598999,-0.0061683655,0.0119018555,0.02267456,-0.015563965,-0.01436615,0.05218506,0.019165039,0.0069732666,0.03829956,0.04434204,0.011932373,0.02281189,0.045196533,0.022506714,-0.012489319,-0.093933105,0.029556274,-0.025146484,-0.01939392,-0.014907837,-0.0395813,-0.03527832,-0.01637268,-0.013702393,0.020507812,-0.010986328,-0.054107666,-0.019088745,-0.0020694733,-0.017623901,0.019226074,-0.030349731,-0.0039138794,-0.013343811,0.064819336,0.025238037,-0.011161804,-0.07330322,0.013244629,0.04534912,0.00907135,0.033843994,-0.013999939,-0.022201538,-0.00116539,0.0009317398,-0.05621338,-0.020736694,0.005996704,-0.0025691986,-0.01675415,-0.020248413,0.039642334,-0.0012359619,0.020355225,-0.0064964294,0.030792236,-0.04360962,0.017120361,-0.017578125,0.08154297,-0.0017175674,-0.013305664,-0.048950195,0.026382446,-0.0048942566,0.031021118,-0.061431885,0.011383057,-0.0010681152,0.013381958,0.013755798,0.03781128,-0.010009766,-0.008590698,-0.026748657,-0.07409668,0.031677246,-0.049591064,0.043792725,0.035949707,-0.013168335,0.04800415,-0.007171631,-0.023880005,0.022033691,0.009414673,-0.0025863647,-0.030838013,-0.04321289,-0.03930664,-0.002691269,-0.03640747,0.050872803,-0.025680542,0.05532837,-0.0065841675,-0.015357971,0.01626587,0.055847168,0.0124053955,0.009300232,-0.0058898926,-0.016159058,0.04437256,0.0041160583,-0.03930664,0.0289917,-0.0015182495,0.0068244934,0.001294136,0.018218994,-0.010353088,0.0020866394,0.010505676,-0.009063721,-0.01965332,-0.044036865,0.017410278,0.029067993,0.016860962,-0.0107040405,-0.012786865,0.021652222,-0.0048103333,-0.04550171,-0.033843994,0.003458023,-0.00007754564,-0.013496399,0.0021324158,0.0013360977,0.006008148,-0.03112793,0.021408081,-0.006755829,0.021743774,0.008491516,0.00623703,0.0013360977,0.00020349026,0.002374649,0.013244629,-0.0061454773,0.023635864,0.0049743652,-0.0024585724,0.004333496,0.035095215,-0.016143799,-0.006175995,-0.053222656,-0.0058670044,0.016616821,-0.0022087097,0.012908936,-0.0020809174,0.018692017,-0.01285553,-0.0059432983,-0.004070282,-0.013679504,0.0074424744,-0.005531311,0.009346008,-0.010620117,-0.029769897,0.021347046,0.03552246,-0.0024204254,-0.012496948,-0.008232117,0.018936157,-0.000099778175,-0.023712158,-0.024551392,-0.016815186,0.009048462,0.056915283,-0.00019669533,0.013076782,0.019165039,-0.020462036,-0.007835388,-0.011505127,-0.015342712,-0.032928467,-0.010185242,-0.04800415,0.015075684,0.035949707,0.013893127,-0.02973938,0.0047035217,-0.010040283,-0.008522034,-0.01776123,-0.00095558167,0.0028648376,-0.017990112,-0.020355225,0.014228821,0.009719849,-0.0053520203,-0.00920105,-0.05456543,-0.023773193,-0.00041413307,0.053375244,-0.04248047,0.01802063,-0.0029354095,-0.03338623,-0.008796692,0.027938843,0.036224365,0.018920898,-0.005771637,0.017654419,-0.015853882,0.027023315,0.0063972473,0.0154953,-0.0063476562,-0.014854431,-0.020767212,-0.03765869,0.027893066,0.040008545,0.010063171,-0.0067443848,-0.022644043,-0.03668213,-0.011772156,-0.041290283,0.023468018,0.042022705,0.026123047,0.013336182,0.017745972,-0.005016327,0.009407043,-0.022842407,-0.014816284,0.0026760101,0.023803711,0.013755798,-0.01499939,-0.058563232,0.014266968,-0.015472412,-0.011657715,-0.07702637,-0.026428223,-0.0019054413,-0.016342163,0.00077342987,0.023391724,-0.03302002,-0.02633667,-0.016571045,-0.057159424,0.017730713,-0.016540527,0.0049552917,0.0031738281,-0.036743164,0.010902405,0.01864624,-0.029632568,0.036834717,0.0181427,-0.021072388,-0.041900635,0.023956299,-0.008903503,0.026260376,-0.049194336,-0.0054512024,-0.0075683594,-0.0357666,-0.055725098,0.019241333,0.00053453445,0.0034255981,-0.024093628,-0.014961243,-0.011177063,0.0043945312,-0.0146484375,-0.029937744,-0.013374329,-0.009025574,-0.019317627,0.033111572,0.047912598,0.039154053,-0.023040771,-0.034851074,0.010749817,0.009674072,-0.012176514,0.012374878,0.05783081,-0.011299133,-0.025482178,-0.019836426,0.023208618,0.022064209,0.0026359558,-0.0017061234,-0.0038909912,0.038024902,-0.0063285828,0.013893127,-0.00016105175,0.044677734,0.04852295,0.047698975,-0.012481689,0.0029354095,-0.03765869,0.008140564,0.046783447,-0.019378662,0.0075302124,-0.023483276,0.026687622,0.01210022,0.011436462,0.02154541,0.029220581,0.0115356445,-0.012817383,-0.023223877,0.018066406,0.0055274963,-0.08770752,-0.036193848,-0.05328369,-0.00680542,-0.03262329,-0.021606445,0.019805908,0.014457703,-0.03881836,-0.0715332,0.04083252,0.021087646,-0.006385803,0.023284912,0.005455017,0.016647339,0.009460449,-0.036590576,-0.00059747696,0.04812622,-0.013648987,-0.03717041,-0.032592773,0.024002075,0.0050964355,-0.002506256,-0.04248047,-0.0007863045,0.021621704,-0.0112838745,0.016830444,-0.0072250366,0.012924194,-0.008201599,0.008468628,-0.0028057098,-0.02168274,0.0491333,-0.045043945,0.04168701,0.024505615,0.012893677,-0.002439499,0.034454346,-0.031982422,-0.02947998,-0.029022217,0.0016822815,0.033996582,0.048919678,-0.00008535385,0.0068893433,0.03250122,-0.007446289,0.021270752,-0.024429321,-0.0073432922,-0.013587952,-0.008171082,0.050994873,0.03729248,-0.0023899078,0.00705719,-0.027282715,0.019470215,-0.01424408,0.005809784,-0.012893677,-0.00024318695,-0.043914795,-0.009719849,0.0066871643,0.008506775,-0.0027065277,0.009788513,0.034820557,-0.0143585205,-0.011459351,-0.003458023,-0.00831604,0.0473938,-0.027175903,0.010383606,-0.021026611,0.030334473,-0.0047187805,-0.005710602,0.009216309,-0.04434204,0.00021493435,-0.021469116,-0.04058838,-0.011444092,-0.036865234,-0.0158844,-0.016220093,-0.0053634644,-0.00031900406,-0.034454346,0.0010986328,-0.037078857,0.012496948,-0.006149292,0.03353882,-0.008003235,0.014450073,-0.0001348257,-0.005569458,0.003162384,0.03164673,-0.009765625,-0.010757446,0.03414917,0.0022907257,-0.0032157898,-0.018844604,-0.009689331,-0.018478394,-0.017486572,-0.0034236908,-0.02154541,0.0010471344,0.03265381,-0.024124146,-0.006877899,0.031799316,0.027938843,-0.04949951,0.029937744,0.017745972,-0.023620605,0.010368347,0.01953125,-0.042938232,-0.016159058,0.021652222,0.029708862,-0.028411865,0.0027694702,-0.060913086,0.0023956299,0.0020008087,0.021026611,0.048339844,0.005077362,0.03845215,0.02583313,0.0066070557,-0.0014724731,-0.033111572,-0.029937744,0.013130188,0.018630981,-0.017410278,-0.0002734661,-0.047424316,0.031097412,-0.035827637,0.021728516,0.018798828,-0.0093307495,-0.013175964,-0.07128906,0.0002259016,0.0087890625,-0.034301758,-0.0030574799,-0.01802063,0.029052734,0.019317627,0.050354004,0.02961731,0.009544373,-0.025543213,-0.021987915,-0.038513184,-0.013587952,-0.02986145,-0.0030536652,0.0015287399,0.012680054,0.020309448,0.0030441284,0.025634766,0.005355835,0.053985596,-0.0107421875,0.03164673,0.0037937164,0.01424408,0.006641388,0.016525269,0.0056533813,0.051971436,-0.029205322,0.029281616,0.027175903,0.057128906,0.0076828003,-0.012054443,0.058654785,0.009468079,-0.02432251,0.035095215,0.0058670044,-0.009414673,-0.012481689,0.0050849915,0.034362793,0.015823364,0.040802002,0.043640137,-0.0074806213,-0.004348755,0.017532349,-0.008712769,-0.029281616,0.01134491,0.015586853,0.008407593,-0.02128601,-0.01890564,0.0143966675,-0.006412506,0.0031280518,0.0152282715,-0.014701843,-0.0019893646,-0.008270264,0.00021970272,-0.015319824,-0.0034809113,0.03982544,0.026504517,0.00061893463,0.010360718,0.03289795,0.011299133,0.042633057,0.010734558,-0.0016889572,-0.040405273,-0.008171082,0.015457153,0.0010242462,0.005268097,-0.012313843,0.022445679,0.011672974,0.04522705,0.02746582,-0.019577026,-0.008552551,0.015419006,-0.01663208,-0.026901245,0.04269409,0.021881104,0.03479004,0.015396118,0.012702942,0.036743164,-0.030227661,0.03616333,0.03543091,-0.0024852753,-0.01424408,-0.0037212372,-0.023483276,-0.03466797,0.005706787,-0.009864807,-0.00819397,0.028076172,-0.00058555603,-0.0041122437,-0.010017395,0.0037822723,-0.0040397644,-0.0033836365,-0.01335907,-0.0040245056,-0.00018060207,0.020690918,0.0014038086,0.048736572,0.010528564,0.017059326,0.007358551,-0.04248047,-0.0058288574,0.0030994415,-0.03756714,-0.018814087,-0.023376465,-0.020095825,-0.028335571,0.026184082,-0.015037537,-0.0019607544,0.010040283,-0.014724731,-0.0018472672,-0.010719299,0.023223877,0.033599854,0.00031590462,0.023498535,0.007827759,0.0077209473,0.047180176,0.0019950867,0.008392334,0.006916046,-0.0027065277,0.007019043,-0.012893677,0.005191803,-0.028915405,-0.01727295,0.005126953,-0.00036478043,0.0007019043,0.011512756,0.053527832,-0.0055160522,-0.018356323,-0.009185791,0.052520752,-0.0023555756,0.024917603,0.009506226,0.025115967,-0.01663208,0.023239136,-0.0047912598,0.01576233,0.04675293,0.005016327,0.021728516,0.017425537,-0.00044822693,0.011978149,0.017105103,0.017089844,0.019943237,0.0069351196,-0.03161621,-0.017333984,0.0018167496,-0.033233643,-0.017730713,-0.010955811,0.021636963,0.021240234,0.0418396,0.022613525,0.0069084167,-0.010612488,0.06402588,0.015380859,0.02935791,0.020111084,-0.022018433,0.03149414,0.023345947,-0.00061893463,0.028900146,0.0033874512,-0.023773193,0.019256592,0.011482239,0.017654419,0.018081665,-0.000279665,-0.045532227,0.035827637,-0.0087890625,0.020721436,0.008628845,0.014640808,0.013626099,0.00007289648,0.00030946732,0.008476257,-0.015487671,-0.0017337799,0.03479004,-0.009857178,0.010696411,0.019729614,-0.014572144,0.047851562,-0.0021152496,-0.013870239,-0.006023407,-0.022766113,-0.010345459,-0.00007593632,-0.036468506,0.0013608932,-0.0052719116,-0.020721436,0.0023784637,-0.013473511,0.013046265,0.0073242188,0.016555786,0.004283905,-0.015319824,0.0023059845,0.033813477,-0.01473999,0.03805542,-0.021316528,0.021057129,0.022064209,0.011871338,-0.0138549805,-0.0020141602,0.017944336,0.0041770935,0.016036987,0.02619934,-0.04196167,0.0006990433,0.009719849,-0.020812988,-0.010116577,0.0128479,-0.017562866,0.02633667,-0.0146484375,-0.009757996,0.0060310364,0.011985779,0.010307312,0.0013380051,0.0143966675,-0.011070251,-0.02293396,0.031799316,0.0018730164,-0.060333252,0.015602112,-0.0044021606,0.023971558,-0.012672424,0.0050697327,-0.00021588802,-0.026535034,0.0034484863,0.015930176,-0.0064735413,0.025680542,-0.0047836304,0.026748657,0.0028305054,0.022857666,0.022491455,0.03564453,0.021194458,0.00015640259,-0.033935547,0.027297974,-0.038879395,-0.010093689,-0.022613525,0.019012451,0.012207031,-0.016036987,0.024963379,-0.0030918121,-0.015701294,-0.010177612,-0.015548706,0.011260986,-0.007217407,-0.0146865845,-0.01084137,0.011146545,-0.024673462,-0.013549805,0.012969971,-0.009506226,0.055267334,-0.0044136047,0.01449585,0.0020103455,0.015434265,-0.003665924,0.040252686,0.018371582,0.02355957,-0.0031929016,-0.03427124,-0.013435364,0.035217285,0.01309967,0.0068893433,0.0033359528,-0.0134887695,-0.033447266,0.016677856,0.011177063,0.0023784637,-0.0014820099,-0.009666443,-0.02671814,-0.010948181,0.015281677,-0.040100098,0.02519226,0.01210022,-0.018112183,-0.009346008,-0.04663086,-0.025177002,-0.0020313263,0.01826477,-0.003660202,-0.04031372,-0.0143585205,0.021392822,0.029586792,-0.030456543,0.0066452026,-0.02986145,0.034088135,-0.012374878,-0.008598328,0.01991272,-0.0010404587,0.024719238,-0.021911621,0.0135269165,0.0015916824,-0.011802673,-0.009269714,0.006416321,-0.007446289,0.008232117,-0.03164673,0.011497498,0.029205322,-0.0036182404,0.005130768,0.0008597374,-0.008346558,0.021133423,-0.025421143,-0.0001707077,0.055267334,0.013999939,0.0038394928,-0.013252258,0.02520752,-0.012077332,-0.026870728,0.02784729,0.04055786,0.031097412,0.0057754517,-0.010040283,0.009635925,-0.022247314,-0.0038909912,-0.010147095,-0.006565094,0.01739502,-0.0335083,-0.0028572083,0.06262207,0.0109939575,-0.021148682,-0.012992859,0.02709961,0.030975342,0.0029754639,0.035217285,0.009124756,0.012138367,-0.017700195,-0.016021729,0.00047016144,0.025466919,-0.017333984,0.028411865,-0.0011386871,0.015434265,-0.020721436,-0.0052452087,0.022476196,-0.035461426,-0.02468872,-0.0031204224,-0.017364502,-0.008308411,0.009666443,0.0027046204,0.006706238,0.018692017,0.0014629364,-0.034576416,-0.021408081,0.015213013,0.008468628,-0.013626099,0.0104599,0.032989502,0.0027008057,-0.0044021606,-0.00017488003,-0.024795532,-0.047943115,0.004573822,0.0001757145,0.012680054,0.00522995,-0.028121948,-0.004875183,0.00894165,0.0016393661,-0.010375977,0.020126343,-0.009460449,0.004634857,0.033416748,0.008552551,0.0017175674,0.02357483,-0.042266846,0.0135650635,0.0053901672,-0.006565094,0.011680603,-0.017868042,0.03564453,-0.027359009,-0.0046195984,0.039794922,-0.03137207,0.015991211,-0.0049057007,0.016098022,-0.03060913,-0.0035629272,0.004753113,-0.020080566,-0.032714844,0.022003174,-0.040130615,-0.0335083,-0.03414917,0.011489868,0.022521973,-0.02180481,0.037719727,-0.01322937,-0.03253174,0.014266968,0.030532837,-0.01939392,0.016662598,0.010177612,0.024902344,0.012771606,-0.005264282,-0.0041160583,-0.023391724,-0.016723633,-0.0012168884,-0.026794434,0.017868042,0.0007610321,0.0020866394,0.0680542,-0.019485474,0.01259613,0.014213562,0.010475159,0.009666443,0.009002686,0.06604004,0.012641907,-0.017105103,-0.013137817,-0.0064086914,-0.031280518,-0.0041542053,-0.016952515,-0.0014400482,-0.0010938644,-0.0037231445,-0.0053482056,0.011276245,-0.0112838745,-0.0023040771,-0.009109497,0.02053833,-0.018814087,-0.0107421875,-0.018722534,-0.008552551,0.019729614,0.01398468,0.018753052,0.030303955,-0.00073099136,0.0062713623,0.04043579,0.0014867783,-0.023880005,0.0015172958,-0.0008158684,0.003320694,0.025527954,0.016067505,0.011116028,0.0027484894,0.008651733,0.017211914,-0.003868103,-0.010612488,-0.015991211,0.018447876,0.0027503967,0.0038833618,0.04647827,-0.005680084,-0.009315491,0.013282776,-0.016860962,0.017456055,0.017807007,-0.020309448,0.04058838,0.03366089,-0.03741455,0.05142212,0.00023150444,0.0059890747,-0.012641907,0.003396988,-0.049713135,-0.0035762787,-0.01687622,-0.0023269653],"createdAt":"2026-04-18T18:33:01.820Z","updatedAt":"2026-04-23T20:01:24.729Z","lastSeenAt":"2026-04-23T20:01:24.729Z","tsv":"'/api':193 '/api/v1/stocks/regn':135 '/docs':191 '/pricing':192 '/readme':195 '/request':18,36 '0.02':17,35,58,82,127 '000':73 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':181 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':185 '1':169 '20':72 '402':164 '6':78 'Base USDC stock API' 'REGN stock data' 'Regeneron stock quote' 'accept':170,234 'account':87 'across':113 'actual':242 'address':180 'advertis':68,154 'ai/ml':116 'among':152 'analyt':115 'api':54,84 'application/json':239 'avail':220 'base':12,30,63,74,176 'base-network' 'broader':107 'call':4,22,56 'categori':122 'challeng':67,165,230 'connect':201 'content':207 'contract':184 'cost':57 'crawl':144,223 'crypto':119 'crypto-paid stock data' 'data':6,24,43,114,140 'decim':79 'document':186 'dozen':110 'endpoint':38,112,132,141,157,233 'equal':81 'exact':172 'exampl':218 'explicit':151 'extrem':188 'financ':118 'gate':53 'handl':92 'header':102 'http':235 'indic':231 'infer':117 'inlin':93 'json-response' 'key':85 'land':145 'list':149 'live':159 'lowpaymentfee.com':40 'mainnet':177 'maxamountrequir':70 'need':89 'network':64 'no-api-key' 'offer':109 'openapi':211 'oper':105 'output':225 'page':146,196 'pay':2,20,178 'pay-per-cal':1,19 'pay-per-call stock API' 'payload':219 'payment':90,101,173 'per':3,21,128 'per-call-pricing' 'pharmaceut':46 'platform':108 'post':236 'price':124 'probe':133 'prompt':203 'proper':163 'protocol':97 'provid':41,104 'regeneron':45 'regn':8,26,48 'render':198 'request':129 'request/response':214 'respons':243 'return':161,238 'rout':155 'schema':215,226 'scheme':174 'settl':13,31 'spec':212 'specif':131 'stock':5,23,42,139 'stock price API' 'stock-data':138 'structur':244 'thin':189 'though':142 'ticker':47 'uniform':125 'unit':75 'unknown':246 'usdc':15,33,60,77,183 'usdc-settlement' 'util':121 'version':168 'via':9,27,94 'wallet':202 'x':100 'x-payment':99 'x402':10,28,52,66,96,167,229 'x402 stock endpoint' 'x402-gated':51 'x402-payment'","prices":[{"id":"93e7dfd8-942f-4a97-8cb5-77f7473cc252","listingId":"0ad8b33e-026a-4b19-b8bc-5bfb9517fe4c","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/stocks/REGN","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:01.820Z"}],"sources":[{"listingId":"0ad8b33e-026a-4b19-b8bc-5bfb9517fe4c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/REGN","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:01.820Z","lastSeenAt":"2026-04-23T20:01:24.729Z"}],"details":{"listingId":"0ad8b33e-026a-4b19-b8bc-5bfb9517fe4c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/REGN \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stocks/REGN"},{"claim":"The platform advertises uniform $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with x402 version 1 and exact scheme","source_url":"https://lowpaymentfee.com/api/v1/stocks/REGN"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching current or recent stock data for Regeneron (REGN) without needing an API key or subscription","Integrating stock lookups into an AI agent workflow that can settle payments via x402 on Base","Building a trading dashboard that pays per query in USDC rather than maintaining a subscription"],"bestFor":["Agents or bots that need on-demand stock data with crypto-native payment","Developers who want zero-signup, pay-as-you-go stock data access","Low-volume or sporadic stock data consumers who don't want monthly subscriptions"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data feeds","Users who need comprehensive historical stock data or full market coverage","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T19:32:37.667Z"},"updatedAt":"2026-04-23T20:01:24.729Z"}}