{"id":"cf912ac0-247e-473d-aac9-69a421eaa382","shortId":"fVm4qr","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides pay-per-request API access using the x402 protocol, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/76` is listed under \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys, rate limits, or subscriptions are required — each request is individually paid via an X-PAYMENT header.\n\nThe broader lowpaymentfee.com platform offers a suite of endpoints spanning 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 uniformly priced at $0.02 per request.\n\nThe specific endpoint `/api/v1/lab/results/76` appears to be a lab results resource, but no documentation exists describing the exact data returned or the input schema expected in the POST body. The endpoint is confirmed live, returning a proper 402 x402 challenge. Without further documentation or example responses, the exact nature of the \"lab results\" data is unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["data","api-infrastructure"],"synonyms":["pay-per-call API","x402 API","USDC micropayment API","lowpaymentfee","Base network API","lab results API","premium data endpoint"],"warnings":["No documentation exists for the /api/v1/lab/results/76 endpoint — the nature of 'lab results' data is unknown","No input schema or example request body is provided for the POST method","No example response or output schema is available","The /api, /pricing, and /README pages returned no meaningful content (only 'Connect wallet')","This endpoint does not appear in the homepage's listed API catalog, raising questions about its purpose"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/76","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/lab/results/76","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 x402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation describing what this specific endpoint returns, no input/output schema, no example requests or responses, and the meaning of 'lab/results/76' is entirely opaque. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful 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":"2026-04-21T22:38:53.005Z","embedding":[-0.016693115,-0.032440186,0.05166626,0.01260376,0.02180481,-0.025177002,-0.024749756,0.030197144,0.06744385,-0.08538818,0.031219482,-0.046875,-0.029067993,-0.03338623,-0.032104492,0.0016088486,-0.000936985,0.015975952,-0.054748535,0.022521973,0.030090332,-0.035369873,-0.025268555,0.015319824,-0.00010430813,-0.032440186,0.008605957,-0.014831543,-0.00831604,-0.040283203,0.020950317,-0.02798462,-0.009864807,0.006626129,-0.032165527,-0.009178162,-0.0023784637,0.046936035,0.00907135,-0.027648926,-0.010566711,-0.05960083,0.0015029907,0.0060043335,-0.053955078,-0.012817383,0.0042762756,-0.041656494,0.013595581,-0.0155181885,-0.035125732,-0.007896423,0.0042877197,-0.013969421,0.020080566,0.009628296,0.011802673,-0.012878418,0.015457153,0.008277893,0.008079529,-0.0657959,-0.0049934387,-0.005138397,-0.0018005371,0.059448242,-0.015670776,0.036590576,0.023223877,0.054351807,0.046875,0.05895996,0.014259338,0.024368286,-0.010482788,-0.009086609,-0.0015268326,0.051971436,-0.027908325,-0.023468018,-0.01625061,-0.021835327,-0.015602112,0.0025024414,-0.004047394,-0.041137695,-0.017684937,0.009735107,-0.007205963,0.01725769,-0.08117676,-0.019805908,0.009529114,0.021453857,0.028060913,-0.006816864,-0.00932312,0.017700195,-0.010467529,0.010055542,0.01776123,-0.035858154,0.015411377,0.008605957,0.018737793,0.040924072,-0.003250122,0.031921387,0.006126404,-0.017608643,-0.008148193,0.015266418,-0.023071289,-0.0048217773,-0.0023536682,0.009086609,-0.026123047,0.009010315,-0.028808594,0.011184692,-0.046417236,0.056610107,0.01637268,-0.029541016,0.015960693,-0.03552246,0.004890442,0.0022697449,-0.0036849976,-0.015350342,0.034057617,0.0044441223,0.027114868,-0.003566742,-0.045410156,0.018630981,-0.010871887,-0.021896362,-0.0513916,-0.043762207,0.050445557,-0.01612854,0.035491943,0.032073975,-0.08117676,-0.008926392,-0.038848877,0.01625061,-0.020401001,0.0048446655,-0.0046310425,0.039764404,-0.031341553,0.0016031265,-0.032409668,-0.02758789,0.018356323,0.021331787,-0.036315918,0.04486084,0.005859375,0.03262329,0.02168274,0.0011920929,0.026885986,0.0362854,0.0068130493,-0.06689453,-0.08721924,-0.012138367,-0.025497437,-0.01058197,-0.03062439,0.009315491,-0.014823914,-0.054718018,-0.011268616,-0.009277344,0.000020086765,-0.04348755,-0.0154800415,-0.03289795,0.0017347336,-0.0006918907,-0.070495605,-0.03149414,-0.02822876,0.068481445,0.015136719,0.014450073,0.04168701,-0.02885437,0.059295654,0.027267456,-0.027404785,-0.03439331,0.03652954,-0.011795044,0.010375977,0.0035152435,0.0012216568,-0.029251099,0.037109375,0.04949951,0.008552551,-0.028060913,-0.021087646,-0.06335449,-0.027832031,-0.045166016,0.011558533,0.024536133,0.0087509155,0.055511475,-0.025436401,-0.021987915,-0.010025024,0.010757446,0.025238037,0.048980713,0.016052246,-0.01096344,0.04232788,0.007827759,-0.05697632,0.026733398,0.04446411,0.010902405,-0.02293396,-0.04437256,0.028198242,0.029647827,-0.016708374,0.0064468384,-0.010856628,0.024246216,-0.009994507,0.010269165,0.022827148,-0.021881104,-0.025665283,-0.03366089,-0.009002686,0.039794922,0.0017871857,-0.023529053,-0.035247803,-0.0869751,0.045532227,0.034729004,0.026824951,-0.020568848,0.034210205,-0.047180176,-0.012374878,-0.046875,0.03765869,0.05819702,-0.018936157,-0.019897461,0.016937256,-0.008979797,-0.03161621,-0.0066986084,-0.020309448,-0.030776978,-0.027954102,0.020843506,-0.06323242,0.0009551048,0.013916016,0.03491211,0.050201416,-0.016586304,-0.036499023,-0.016464233,-0.0009870529,0.016433716,-0.022338867,-0.006175995,-0.022964478,0.028930664,0.0259552,-0.009521484,0.023513794,-0.005592346,-0.000104010105,-0.019577026,0.0071029663,-0.01386261,-0.017166138,0.019424438,0.0014572144,-0.058135986,0.0036201477,-0.009841919,0.06573486,-0.044006348,0.036621094,-0.017715454,-0.0077590942,0.05126953,0.0018854141,-0.048706055,0.013397217,0.031921387,0.024353027,0.034240723,0.006439209,-0.029251099,-0.010414124,0.07159424,-0.012268066,-0.013977051,-0.003042221,0.0112838745,0.03250122,-0.0043678284,-0.064819336,-0.029464722,-0.017608643,-0.045166016,0.03149414,-0.029037476,0.0109939575,0.0014047623,0.004837036,-0.028060913,-0.013381958,-0.035736084,0.017105103,0.002286911,0.012565613,-0.004638672,0.008003235,0.02229309,0.008224487,-0.00356102,0.015670776,0.043029785,0.011436462,-0.008560181,-0.03186035,-0.0140686035,0.0008893013,-0.0051879883,0.04296875,0.01537323,0.0099487305,0.04272461,-0.018463135,0.020645142,0.024658203,0.024612427,0.025802612,-0.0043258667,0.00642395,-0.07165527,-0.040252686,-0.0340271,-0.066223145,0.040496826,0.030960083,0.01184845,0.049194336,0.0054512024,-0.040161133,-0.04623413,0.022415161,-0.039123535,0.0024738312,0.039154053,-0.0022277832,-0.020767212,0.0014352798,-0.004573822,0.012565613,0.04321289,0.012290955,0.0309906,0.082336426,0.05645752,0.009269714,0.009674072,0.022201538,0.026977539,-0.009803772,-0.018875122,-0.028823853,-0.01234436,0.014465332,-0.019836426,-0.014045715,-0.07659912,0.05178833,0.05105591,0.06726074,0.02545166,0.004219055,0.029006958,-0.017654419,0.0024738312,-0.03918457,-0.0073051453,-0.009963989,-0.059143066,0.022415161,-0.006023407,0.019226074,-0.023544312,0.021621704,-0.00598526,0.016036987,-0.03161621,0.052093506,0.0017986298,0.011299133,0.034698486,0.00060510635,0.04373169,0.05886841,-0.04714966,0.04724121,0.031585693,-0.02885437,0.003004074,0.03564453,-0.02558899,-0.02583313,-0.04699707,-0.042175293,-0.0060653687,-0.01209259,-0.05822754,-0.01625061,0.014099121,0.008735657,0.023849487,-0.030960083,-0.020004272,0.017181396,0.0059547424,-0.04385376,-0.0014457703,-0.042663574,0.016921997,0.030700684,-0.012191772,-0.0015602112,0.00233078,0.009857178,-0.012580872,0.018814087,0.020523071,-0.0041885376,-0.055389404,0.023086548,-0.0008621216,0.02722168,0.004447937,0.037963867,0.004299164,0.045776367,0.05130005,0.0046424866,-0.011512756,-0.06088257,0.010902405,-0.051483154,-0.006664276,0.022384644,-0.030914307,0.0004005432,-0.0112838745,-0.029769897,-0.01309967,-0.010719299,-0.05508423,0.011329651,0.021255493,-0.025177002,-0.03945923,-0.048980713,-0.03173828,-0.015296936,0.04876709,0.020202637,0.0031929016,-0.06347656,-0.022018433,0.0395813,0.001039505,0.01499176,-0.015083313,-0.017211914,-0.0074157715,-0.033477783,0.008544922,-0.0034160614,0.030639648,0.0070152283,-0.027664185,0.022262573,0.018310547,0.034210205,0.013153076,0.005378723,0.036376953,-0.030380249,0.014663696,-0.0024433136,0.05105591,0.02078247,-0.024108887,-0.053375244,0.03933716,0.006969452,0.020141602,-0.036712646,0.008979797,-0.0051498413,0.015174866,0.005592346,-0.018356323,-0.015899658,-0.0149383545,-0.05026245,-0.07165527,0.04458618,-0.012054443,0.02784729,0.01625061,0.020721436,0.015808105,0.0044403076,-0.022003174,0.040161133,-0.014030457,-0.018035889,-0.0395813,-0.021850586,-0.017562866,-0.021438599,-0.014755249,0.02104187,-0.017501831,0.024856567,0.00705719,-0.0134887695,0.016571045,0.0069770813,-0.005428314,0.02305603,-0.00016868114,0.008453369,0.038116455,0.016662598,-0.03982544,0.010612488,0.002128601,0.0053634644,0.00522995,0.042541504,0.019317627,-0.01739502,0.0039978027,-0.0034427643,-0.025497437,-0.028411865,0.005104065,0.0061454773,0.017593384,-0.0013875961,-0.043029785,0.018325806,0.01637268,-0.036895752,-0.009124756,0.02255249,0.010307312,-0.024856567,0.009483337,0.03894043,0.04840088,-0.021026611,0.0049209595,0.009284973,0.031173706,0.020568848,0.019821167,-0.007949829,0.028137207,0.0035171509,0.016494751,0.006187439,-0.009490967,0.025985718,-0.00844574,0.03173828,0.01826477,-0.0033931732,-0.0010232925,-0.020736694,0.006210327,0.003238678,-0.01133728,0.02017212,0.030593872,0.021652222,-0.024795532,0.017318726,0.004131317,-0.02722168,-0.019958496,0.013458252,0.03793335,-0.027359009,-0.01777649,0.016433716,0.013900757,0.031311035,-0.047698975,-0.013877869,-0.0058670044,0.020111084,-0.026977539,-0.03805542,-0.0357666,-0.003850937,0.036315918,-0.0024871826,0.022384644,0.030410767,-0.007881165,0.005279541,0.020721436,0.0045814514,-0.0020008087,-0.019378662,-0.04284668,0.011833191,0.0047683716,-0.00333786,-0.048309326,0.00009214878,-0.01687622,-0.031036377,-0.0028915405,-0.011024475,-0.009429932,-0.016433716,0.008010864,0.024124146,-0.0016851425,0.004180908,-0.018493652,-0.039794922,0.0018920898,0.012069702,0.01625061,-0.04916382,0.017227173,-0.014930725,-0.01234436,-0.00047683716,0.031311035,0.012626648,0.034423828,-0.002538681,0.03640747,-0.037322998,0.030456543,-0.026763916,-0.0032215118,0.010414124,-0.034362793,-0.019241333,-0.018737793,-0.013824463,0.04800415,-0.0014886856,-0.010139465,-0.027404785,-0.031066895,-0.013969421,-0.049468994,0.016143799,0.05444336,0.035003662,-0.011192322,0.0064582825,-0.0043296814,-0.013298035,-0.016693115,0.0096588135,-0.006046295,0.022155762,0.008651733,0.004058838,-0.036224365,-0.01914978,-0.02017212,0.01109314,-0.051086426,-0.04360962,-0.017974854,-0.0016002655,-0.008277893,0.016571045,-0.014808655,-0.009109497,-0.008972168,-0.039093018,0.022994995,0.008605957,0.008682251,0.00075769424,-0.022064209,-0.007926941,0.0140686035,-0.0075683594,0.040100098,0.0059509277,-0.022491455,-0.030960083,0.0038204193,0.029800415,0.02772522,0.0007009506,-0.015945435,0.0050201416,-0.012001038,-0.064086914,-0.01399231,0.00021266937,-0.01133728,-0.0065078735,0.0012369156,-0.044281006,-0.003107071,-0.03048706,-0.0040016174,0.016799927,0.020507812,0.01071167,0.015960693,0.017227173,-0.012229919,-0.009048462,-0.040252686,0.015899658,0.010665894,-0.0006303787,0.02330017,0.057495117,-0.01222229,-0.022460938,-0.006816864,-0.00034570694,0.013366699,-0.016433716,0.01600647,0.006690979,0.004383087,0.0004413128,-0.016784668,-0.028533936,-0.009147644,0.081848145,-0.0051345825,-0.011169434,-0.014549255,-0.0077934265,0.026748657,0.032592773,-0.03286743,-0.015975952,-0.025970459,0.010856628,-0.009277344,0.027694702,0.0049438477,0.025634766,-0.014045715,-0.056762695,-0.01789856,-0.00038719177,-0.02835083,-0.07141113,-0.026901245,-0.05303955,0.007675171,-0.01322937,-0.022521973,0.003030777,0.02986145,-0.022567749,-0.0826416,-0.00028538704,0.033447266,-0.011009216,0.023529053,-0.017074585,0.011703491,0.019165039,-0.054595947,-0.00207901,0.035491943,-0.03778076,-0.012794495,-0.012664795,0.0072784424,-0.017593384,-0.02243042,0.008010864,-0.0018281937,0.008216858,-0.02809143,0.00843811,-0.015792847,0.019546509,-0.015151978,0.024215698,-0.01776123,-0.0044784546,0.045166016,-0.044647217,0.023117065,0.029754639,0.0029582977,-0.00422287,0.00944519,0.03125,-0.038604736,-0.0004684925,0.029220581,0.0048561096,0.039794922,-0.024246216,0.032318115,0.020980835,-0.0129776,0.017028809,-0.023025513,-0.019256592,-0.036132812,-0.020843506,0.01852417,-0.006664276,0.021972656,-0.026428223,0.00044870377,0.015007019,-0.00015830994,-0.0074310303,-0.014678955,-0.024917603,-0.023910522,0.008285522,-0.00831604,0.0022506714,-0.005252838,0.023010254,-0.0019264221,0.045196533,0.008728027,-0.01473999,0.0038528442,0.025817871,-0.0046920776,0.006008148,0.011451721,0.01374054,0.024856567,0.0149383545,0.00642395,-0.0440979,-0.025650024,-0.030670166,-0.014305115,0.01322937,-0.009284973,-0.014625549,0.008911133,0.0025253296,-0.006000519,-0.036254883,0.01399231,-0.04019165,-0.017913818,0.005378723,-0.030303955,0.016967773,0.015312195,-0.0034751892,0.026000977,-0.004875183,0.046539307,-0.0018606186,0.006164551,0.033447266,0.038513184,0.022201538,-0.027664185,0.0018606186,-0.011383057,-0.008110046,0.0021381378,-0.013885498,0.0011892319,0.032806396,-0.015312195,-0.01335907,0.012466431,0.011711121,-0.008522034,0.022964478,0.007129669,0.02230835,-0.0063056946,0.034362793,-0.03918457,0.030334473,0.02154541,-0.0078125,-0.01550293,0.0071029663,-0.026031494,0.015625,0.0026454926,-0.019714355,0.044281006,-0.005268097,0.02545166,-0.021759033,-0.0074653625,0.008506775,-0.029464722,-0.0047035217,0.027114868,0.00026988983,-0.015960693,0.008682251,-0.028884888,0.039245605,-0.040039062,0.032409668,-0.010864258,-0.00069761276,-0.0013628006,-0.032104492,-0.026397705,0.0016145706,-0.007648468,-0.00970459,-0.0015716553,0.03656006,0.019119263,0.039398193,0.04977417,0.012390137,0.008659363,-0.03137207,-0.04107666,0.009086609,-0.016036987,0.031341553,-0.009162903,0.0395813,0.047302246,0.0018100739,0.029800415,0.030014038,0.021575928,0.015609741,0.0059661865,-0.005012512,0.0025959015,-0.0007314682,0.019073486,-0.00083112717,0.042816162,-0.028411865,0.022384644,0.017471313,0.022583008,-0.022766113,0.039978027,0.0690918,0.011505127,-0.010467529,0.03857422,-0.004638672,-0.021377563,-0.010803223,-0.020584106,0.052520752,-0.00035500526,0.062561035,0.04660034,0.018936157,0.00969696,0.024337769,-0.020736694,-0.02885437,0.0541687,0.019165039,-0.022766113,-0.021469116,-0.011390686,-0.0059165955,-0.03768921,-0.030273438,0.009979248,-0.014701843,0.014503479,-0.0055274963,0.0023403168,-0.005218506,0.0132369995,0.03173828,0.016098022,-0.009849548,0.030960083,0.020721436,-0.006706238,0.020187378,-0.006603241,0.037475586,-0.024307251,-0.022216797,0.008079529,0.020126343,-0.01373291,-0.02670288,0.010269165,0.0009198189,0.058135986,0.04159546,-0.029800415,0.009414673,0.023727417,0.028137207,0.013061523,0.04699707,0.026016235,0.022964478,0.028518677,0.038024902,0.023773193,-0.02947998,0.022460938,-0.0034427643,0.0070762634,-0.0042304993,-0.005382538,0.0010156631,-0.018188477,0.020706177,0.003479004,-0.0072021484,0.031143188,0.02041626,-0.009513855,-0.012680054,0.004245758,0.008842468,-0.01197052,0.0011968613,0.013557434,-0.018569946,0.024810791,0.012046814,0.036621094,-0.018722534,0.031097412,0.00020694733,-0.014556885,-0.00031280518,0.024612427,-0.0435791,0.008354187,-0.012535095,-0.002571106,-0.048187256,0.02748108,0.029296875,-0.027954102,0.02508545,0.005519867,-0.0075683594,-0.0030612946,0.027542114,0.007575989,0.0052833557,-0.000053048134,-0.020324707,0.0413208,0.051361084,0.015457153,0.014625549,-0.019744873,-0.006614685,-0.02180481,-0.007843018,-0.0079422,-0.009101868,-0.006664276,-0.023101807,0.012245178,0.033081055,0.0036792755,0.040252686,-0.0031318665,0.0060272217,0.0060424805,0.03427124,0.015045166,-0.00504303,-0.0050964355,0.012413025,-0.013938904,0.04446411,0.03125,0.015586853,0.027252197,-0.010902405,-0.015533447,-0.010040283,-0.0036525726,0.022766113,-0.01737976,0.024017334,-0.0048561096,0.0039596558,-0.020584106,-0.038848877,0.008613586,-0.01247406,-0.020767212,-0.019714355,0.005809784,0.010879517,0.023468018,0.03677368,0.020324707,-0.021896362,0.06616211,-0.004722595,0.059326172,-0.0063056946,-0.0038204193,0.041656494,0.033477783,0.042663574,0.017440796,0.029830933,-0.019958496,0.02911377,0.038116455,0.028640747,0.0152282715,0.012756348,-0.019638062,0.039001465,-0.0014667511,0.030807495,-0.011703491,0.0034122467,0.018035889,-0.0010414124,-0.0103302,0.0059280396,0.00356102,0.015670776,0.027877808,-0.027908325,-0.0076141357,-0.013198853,-0.013160706,0.027938843,-0.0107421875,-0.00945282,-0.004348755,-0.014030457,0.013916016,-0.042510986,-0.01939392,0.0030593872,0.018539429,-0.04727173,-0.009277344,0.007320404,0.018630981,-0.023605347,0.018081665,0.02104187,0.0050201416,0.002653122,0.04714966,-0.009086609,0.038269043,-0.0099105835,0.026504517,0.045959473,-0.0020313263,-0.016220093,0.003107071,-0.0028533936,-0.029663086,0.0060157776,0.03363037,-0.016906738,0.0017290115,0.0032234192,-0.010070801,0.012840271,0.0014591217,-0.009414673,0.0065345764,-0.0049591064,-0.0115356445,-0.021209717,0.018859863,-0.005458832,0.00982666,-0.01058197,-0.013412476,0.006149292,0.030090332,0.007843018,-0.030456543,0.0007505417,0.0031642914,0.011566162,-0.027359009,-0.020462036,0.0025119781,-0.038024902,0.016357422,0.002149582,0.005092621,0.020370483,-0.021347046,0.0000013113022,0.024368286,0.0050468445,0.016479492,-0.0021362305,-0.0016040802,0.019561768,-0.024307251,-0.0016832352,-0.01625061,-0.010154724,0.017471313,0.027359009,0.0056381226,-0.019592285,0.024871826,-0.0052604675,0.01689148,0.007621765,-0.02268982,0.025909424,-0.018920898,-0.0037117004,0.00223732,0.0236969,-0.011909485,-0.00919342,-0.01574707,0.042022705,0.05215454,-0.01020813,-0.005882263,0.033081055,0.009132385,0.005016327,0.04486084,0.006603241,0.038513184,0.02659607,-0.036376953,-0.026031494,0.025268555,-0.000644207,-0.009490967,0.018341064,-0.01512146,-0.027252197,0.012023926,0.0146102905,-0.0032138824,-0.01940918,-0.025344849,-0.019119263,-0.021713257,0.008834839,-0.015853882,0.006931305,-0.009864807,-0.01763916,-0.0018167496,-0.021453857,-0.047912598,-0.014442444,-0.00046157837,-0.0151901245,-0.057922363,0.02319336,-0.02519226,0.005554199,-0.028167725,-0.0039024353,-0.008522034,0.032684326,-0.019088745,0.0003607273,0.024307251,0.0154953,0.02330017,0.014305115,0.027648926,-0.028564453,-0.028778076,-0.019607544,0.0044555664,-0.006931305,0.020355225,0.0055732727,0.029373169,0.015853882,-0.009750366,0.0023994446,0.0016098022,-0.026412964,-0.0026397705,-0.033050537,-0.005207062,0.020431519,0.012748718,0.008071899,-0.014213562,0.035705566,-0.018875122,-0.018829346,0.03552246,0.048919678,-0.00036931038,0.029907227,-0.0121154785,-0.0070877075,-0.006729126,0.0015249252,-0.013923645,0.0011730194,0.010444641,-0.00856781,-0.015335083,0.0077209473,0.0184021,-0.014572144,-0.022064209,0.0104904175,0.0030765533,-0.006706238,0.026748657,0.017944336,0.00057554245,-0.014007568,-0.015205383,0.010864258,0.046325684,0.025909424,-0.0014667511,0.00415802,0.00033807755,-0.0082092285,0.012969971,0.019470215,-0.02394104,-0.03414917,-0.017700195,-0.02772522,0.025863647,0.00022053719,0.011642456,-0.0075569153,0.015838623,-0.002319336,-0.03353882,-0.019607544,0.018859863,0.024856567,0.0019435883,-0.025817871,-0.0029506683,0.014350891,-0.022888184,-0.011428833,-0.029510498,-0.03778076,0.008384705,-0.020980835,0.014335632,0.0050697327,-0.0050086975,-0.006340027,-0.006942749,0.010444641,0.010559082,0.026412964,-0.021560669,-0.003194809,0.026367188,0.014877319,-0.024383545,0.0154953,-0.01663208,-0.006839752,0.023208618,0.0009975433,0.016540527,-0.03741455,0.03173828,-0.011054993,-0.010810852,0.024459839,0.010894775,0.028778076,-0.03765869,0.013587952,0.01084137,0.0074691772,0.039978027,-0.023727417,-0.030883789,0.006668091,-0.017227173,-0.028778076,-0.00036597252,0.022705078,0.05307007,-0.014305115,0.029464722,-0.014190674,-0.020950317,0.007041931,0.007843018,-0.022735596,-0.009170532,0.029541016,0.0054512024,-0.0034713745,-0.0011348724,-0.009353638,-0.025268555,-0.0029354095,0.016921997,-0.01133728,0.00041413307,0.02947998,0.0262146,0.042999268,0.01473999,0.022003174,0.012336731,-0.0035800934,0.0055885315,0.0037021637,0.048217773,0.010848999,-0.01965332,0.02305603,-0.0053596497,-0.0289917,-0.0121154785,-0.008834839,-0.006286621,-0.025634766,0.025283813,-0.0021877289,0.027755737,-0.022003174,0.013519287,-0.022232056,-0.014808655,-0.033935547,-0.007774353,-0.03250122,0.0058403015,0.027328491,-0.0064735413,0.020812988,0.014137268,-0.020553589,0.02507019,0.048980713,-0.01108551,-0.028671265,-0.01600647,0.0034294128,0.006565094,0.015151978,0.011657715,-0.013000488,-0.023422241,0.014205933,-0.019119263,0.02746582,-0.0029392242,0.013313293,0.01586914,-0.011489868,-0.0056037903,0.03439331,-0.018600464,-0.008239746,0.0028381348,0.007030487,0.038909912,0.031829834,-0.003396988,0.026123047,0.028717041,-0.048217773,0.051757812,-0.0060043335,0.020401001,-0.023529053,-0.0016880035,-0.04348755,-0.02961731,0.0020179749,0.0010213852],"createdAt":"2026-04-21T18:32:24.611Z","updatedAt":"2026-04-23T02:02:21.374Z","lastSeenAt":"2026-04-23T02:02:21.374Z","tsv":"'/api/v1/lab/results/76':57,158 '/request':13,28 '0.02':12,27,68,82,152 '000':74 '20':73 '402':192 '6':80 'Base network API' 'USDC micropayment API' 'access':7,22,41,63 'ai':120 'analysi':124 'analyt':114 'api':6,21,40,62,84 'appear':159 'base':9,24,52,75 'base-network' 'bodi':183 'broader':104 'call':4,19,70 'challeng':194 'classif':127 'confirm':187 'convers':144 'cost':65 'data':113,117,173,208 'decim':81 'describ':170 'document':168,197 'embed':128 'endpoint':32,111,147,157,185 'estim':138 'exact':172,202 'exampl':199 'exchang':133 'exist':169 'expect':179 'export':118 'feed':132 'financ':129 'gas':137 'generat':145 'geocod':142 'header':102 'individu':95 'infrastructur':140 'input':177 'insight':119 'json-response' 'key':85 'lab':163,206 'lab results API' 'learn':122 'limit':87 'list':59 'live':188 'lowpaymentfee' 'lowpaymentfee.com':34,105 'machin':121 'maxamountrequir':71 'metric':115 'natur':203 'network':53 'no-api-key' 'offer':107 'paid':96 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':47,101 'per':3,18,38,69,153 'platform':106 'post':182 'post-method' 'premium':5,20,61 'premium data endpoint' 'price':131,150 'proper':191 'protocol':45 'provid':35 'quot':136 'rate':86,134 'report':116 'request':39,93,154 'requir':91 'resourc':56,165 'respons':200 'result':164,207 'return':174,189 'schema':178 'sentiment':123 'settl':46 'span':112 'specif':55,156 'subscript':89 'suit':109 'summar':126 'text':125 'token':135 'unclear':210 'uniform':149 'unit':76 'usdc':15,30,49,78 'usdc-settlement' 'use':42 'util':141 'valid':143 'via':10,25,97 'web3':130 'without':195 'x':100 'x-payment':99 'x402':11,26,44,193 'x402 API' 'x402-payment'","prices":[{"id":"ddc30afc-b776-486f-8f0e-73bb5f393f15","listingId":"cf912ac0-247e-473d-aac9-69a421eaa382","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/lab/results/76","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.611Z"}],"sources":[{"listingId":"cf912ac0-247e-473d-aac9-69a421eaa382","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/76","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.611Z","lastSeenAt":"2026-04-23T02:02:21.374Z"}],"details":{"listingId":"cf912ac0-247e-473d-aac9-69a421eaa382","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/76 \\\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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/76"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/76"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data results on a per-request payment basis without subscriptions","Agent-driven workflows that need to pay for individual API calls programmatically","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that need keyless, on-demand API access","Low-volume consumers who want to avoid subscription commitments"],"notFor":["High-volume batch processing where per-call fees add up quickly","Users who need detailed API documentation and guaranteed SLAs","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.876Z"},"updatedAt":"2026-04-23T02:02:21.374Z"}}