{"id":"050b0963-a266-4036-b699-6263068e6b68","shortId":"DdsjVR","kind":"x402","title":"Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to a specific lab result resource (ID 77) behind an x402 paywall. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs 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 listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nThis specific endpoint (/api/v1/lab/results/77) is not listed on the homepage's catalog, so its exact purpose is unclear — the title \"Premium API Access\" is generic. No OpenAPI schema, request body documentation, or example responses were found in the crawl. The endpoint is confirmed live via a valid x402 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","json-response","no-api-key","lab-results"],"categories":["data","api-infrastructure"],"synonyms":["lab results API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["Endpoint /api/v1/lab/results/77 is not listed in the provider's own homepage API catalog — purpose is unclear","No OpenAPI spec, request body schema, or response examples available","Description 'Premium API Access' is generic and uninformative","Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/77","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/77","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation for what /api/v1/lab/results/77 actually returns. The endpoint is not even listed on the provider's own homepage catalog. Effectively a stub with confirmed liveness.","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":"2026-04-21T22:37:49.546Z","embedding":[-0.01751709,-0.03225708,0.03677368,0.019195557,0.015411377,-0.019439697,-0.034729004,0.0127334595,0.064208984,-0.08673096,0.029418945,-0.04660034,-0.01789856,-0.026168823,-0.027297974,-0.0052604675,0.014144897,0.024612427,-0.061798096,0.015533447,0.029525757,-0.035339355,-0.024124146,-0.0016841888,-0.022964478,-0.038146973,0.004096985,-0.013702393,-0.017944336,-0.032592773,0.028778076,-0.022445679,-0.015899658,0.00207901,-0.041381836,0.020507812,0.0026073456,0.019638062,0.0041046143,-0.028274536,-0.027755737,-0.046813965,0.000300169,0.005428314,-0.043792725,-0.009460449,0.006767273,-0.044403076,0.028915405,-0.028747559,-0.033813477,-0.009170532,-0.0008416176,-0.005519867,0.0021514893,0.0115356445,0.014930725,-0.0020198822,0.01914978,0.0146484375,0.00198555,-0.050445557,-0.0035305023,-0.004322052,-0.0028896332,0.05734253,-0.026290894,0.030044556,0.025390625,0.041290283,0.047424316,0.058532715,0.0044136047,0.026550293,-0.01651001,0.00002002716,0.0072021484,0.06561279,-0.029693604,-0.039520264,-0.010971069,-0.025497437,-0.019134521,0.011474609,0.011245728,-0.03604126,-0.011131287,0.011703491,-0.002714157,0.030715942,-0.08062744,-0.03665161,0.01096344,0.02859497,0.018936157,-0.0009589195,-0.010246277,0.018676758,-0.009849548,0.015960693,0.0079193115,-0.032165527,0.013381958,0.0041885376,0.016235352,0.03717041,-0.0104522705,0.023025513,0.012252808,-0.020645142,-0.0121154785,0.0063934326,-0.033111572,0.0074043274,0.004386902,0.0028877258,-0.026397705,0.013366699,-0.035369873,0.009353638,-0.04058838,0.056365967,0.0038661957,-0.020843506,0.012527466,-0.035705566,0.010826111,-0.013710022,0.0069007874,-0.02923584,0.034210205,0.0005145073,0.010520935,0.0023002625,-0.05633545,0.034240723,-0.012611389,-0.03729248,-0.045562744,-0.039031982,0.034240723,-0.012054443,0.05307007,0.02394104,-0.076538086,-0.0056762695,-0.027511597,0.016235352,-0.010093689,-0.00059461594,0.0067367554,0.03881836,-0.0256958,0.00075912476,-0.021850586,-0.017211914,0.03277588,0.023071289,-0.048065186,0.03741455,-0.008071899,0.022155762,0.021530151,-0.0021896362,0.014953613,0.039093018,-0.008155823,-0.07397461,-0.09716797,-0.004753113,-0.02204895,-0.012832642,-0.028076172,-0.003856659,-0.024383545,-0.04324341,0.00806427,-0.0058784485,0.006187439,-0.03527832,-0.011444092,-0.03012085,0.008468628,0.0012674332,-0.054504395,-0.031173706,-0.023406982,0.07104492,0.015899658,0.023040771,0.03237915,-0.023605347,0.0625,0.041534424,-0.030334473,-0.011398315,0.03717041,-0.021942139,0.0043411255,-0.004676819,-0.01802063,-0.030075073,0.035491943,0.052886963,0.0060539246,-0.027267456,-0.023757935,-0.05923462,-0.00015830994,-0.036621094,0.025619507,0.02909851,0.0005173683,0.049835205,-0.014533997,-0.023025513,-0.021881104,0.017227173,0.015960693,0.038970947,0.013313293,-0.0049705505,0.037475586,0.00573349,-0.05883789,0.039855957,0.03164673,-0.0049819946,-0.017654419,-0.050689697,0.039611816,0.022567749,-0.011489868,0.00573349,-0.00001579523,0.03366089,-0.017440796,0.015686035,0.019134521,-0.017410278,-0.039398193,-0.035491943,-0.016693115,0.03036499,-0.006214142,-0.032989502,-0.027130127,-0.094177246,0.05606079,0.03479004,0.011184692,-0.015609741,0.022857666,-0.06109619,-0.0098724365,-0.044555664,0.028701782,0.033996582,-0.004436493,-0.040039062,0.02468872,-0.0079422,-0.028839111,-0.008987427,-0.024246216,-0.021850586,-0.008857727,0.030303955,-0.075683594,0.010025024,0.022216797,0.014427185,0.053527832,-0.019073486,-0.03488159,-0.005554199,-0.015731812,0.015792847,-0.023040771,-0.008239746,-0.03640747,0.038909912,0.010292053,-0.017990112,0.020706177,-0.009437561,-0.018814087,-0.023590088,0.0093307495,-0.006164551,-0.017440796,0.017059326,0.0129470825,-0.07006836,-0.0030403137,-0.009132385,0.08508301,-0.05380249,0.025985718,-0.02053833,-0.01398468,0.04574585,0.0068740845,-0.059539795,0.018081665,0.045715332,0.031585693,0.033203125,-0.008239746,-0.028701782,-0.032318115,0.061431885,0.003835678,-0.020645142,-0.002714157,0.0038986206,0.027648926,-0.00969696,-0.05810547,-0.03604126,0.0055999756,-0.046295166,0.034454346,-0.010910034,-0.010856628,-0.004928589,0.007598877,-0.02760315,-0.000497818,-0.014831543,0.009391785,-0.0020656586,0.020217896,-0.011459351,0.010566711,0.020385742,0.0140686035,0.0062675476,0.012077332,0.051605225,0.006351471,-0.018707275,-0.026763916,-0.00084638596,0.010566711,-0.0029087067,0.03866577,0.021316528,0.021362305,0.019805908,-0.014533997,0.013534546,0.03515625,0.02508545,0.012435913,-0.011680603,0.0011463165,-0.08203125,-0.019760132,-0.029556274,-0.057769775,0.027542114,0.032684326,0.019104004,0.04724121,0.010734558,-0.03918457,-0.05078125,0.04498291,-0.04272461,0.010360718,0.025802612,0.006023407,-0.019714355,-0.013252258,-0.005783081,0.025527954,0.049591064,0.03527832,0.03427124,0.08630371,0.053253174,-0.0030651093,0.007221222,0.0317688,0.031799316,-0.017471313,-0.0005173683,-0.053741455,-0.017059326,0.0043563843,-0.029830933,-0.013252258,-0.08685303,0.0435791,0.046539307,0.052337646,0.0234375,-0.0006980896,0.029342651,-0.015396118,-0.0034275055,-0.044708252,-0.0019359589,0.003118515,-0.0546875,0.016571045,-0.001748085,0.03781128,-0.030578613,0.0129776,-0.0052948,0.020431519,-0.024047852,0.032470703,-0.0037593842,0.032714844,0.03970337,0.012031555,0.033172607,0.06866455,-0.0357666,0.059020996,0.030715942,-0.019744873,0.008666992,0.03955078,-0.01687622,-0.015060425,-0.047302246,-0.043182373,0.00082588196,-0.025238037,-0.054260254,-0.029266357,0.016296387,0.0042533875,0.013267517,-0.04663086,-0.02027893,-0.001241684,0.008865356,-0.041046143,0.00063562393,-0.03945923,0.023834229,0.01689148,-0.016021729,0.0048294067,-0.0044784546,0.00042295456,-0.029403687,0.017425537,0.031707764,-0.01663208,-0.048461914,0.023010254,-0.013595581,0.016860962,0.00299263,0.040863037,-0.007183075,0.050842285,0.049316406,-0.006839752,-0.0017786026,-0.06451416,0.017791748,-0.049438477,0.0028953552,0.02368164,-0.045898438,0.006210327,-0.0025405884,-0.031433105,0.007522583,-0.007698059,-0.053131104,-0.0015211105,0.003578186,-0.009124756,-0.03768921,-0.035583496,-0.035736084,-0.020965576,0.056793213,0.009643555,-0.0037326813,-0.064086914,-0.028396606,0.052581787,-0.0018892288,0.021026611,-0.015838623,-0.034698486,-0.005241394,-0.040740967,0.020751953,-0.0059280396,0.04095459,-0.0070991516,-0.022384644,0.0047950745,0.020736694,0.04043579,0.01977539,0.00881958,0.03741455,-0.033813477,0.014831543,0.0032024384,0.057495117,0.022323608,-0.03302002,-0.04815674,0.017959595,0.0077705383,0.02217102,-0.025543213,0.007068634,-0.010612488,0.016586304,0.007987976,-0.025726318,-0.017959595,-0.009132385,-0.048675537,-0.06274414,0.042236328,-0.0050811768,0.01713562,0.013320923,0.019699097,0.006843567,0.0070877075,-0.014442444,0.04385376,-0.013626099,-0.021240234,-0.045959473,-0.019348145,-0.023712158,-0.013977051,-0.015235901,0.0075912476,-0.024902344,0.02532959,0.012252808,-0.004917145,0.008644104,0.012008667,-0.0037593842,0.018005371,0.0045700073,0.007949829,0.03060913,0.030151367,-0.04019165,0.020507812,0.011695862,-0.0012226105,0.009513855,0.0418396,0.017211914,-0.014053345,0.00014686584,-0.0020751953,-0.026062012,-0.04486084,0.0075035095,0.0026779175,0.014793396,-0.014190674,-0.020584106,0.015991211,0.031799316,-0.040283203,-0.010284424,0.032348633,0.0073242188,-0.019515991,0.0051002502,0.034057617,0.03918457,-0.014930725,0.015411377,0.002035141,0.030685425,0.028320312,0.024627686,0.0039863586,0.019363403,-0.00054597855,0.014404297,-0.001282692,-0.011772156,0.030014038,-0.002313614,0.04248047,0.0033855438,-0.0047950745,-0.0013046265,-0.028778076,0.008842468,0.015930176,-0.009239197,0.012245178,0.029403687,0.023254395,-0.02268982,0.020309448,0.0002411604,-0.019134521,-0.013458252,0.029373169,0.044555664,-0.0357666,-0.017913818,0.018249512,0.019943237,0.019744873,-0.04296875,-0.027496338,-0.009963989,0.018096924,-0.0287323,-0.04309082,-0.031921387,-0.021224976,0.024490356,0.014457703,0.014846802,0.023834229,-0.021148682,0.009536743,0.0073280334,-0.002532959,-0.007068634,-0.01398468,-0.042510986,0.016586304,0.012786865,-0.015045166,-0.053466797,-0.002002716,-0.01689148,-0.018875122,-0.016326904,-0.021713257,-0.010383606,-0.012428284,0.004142761,0.019927979,0.00086307526,0.008087158,-0.02305603,-0.041870117,-0.002779007,0.01864624,0.016494751,-0.043548584,0.022033691,0.00020003319,-0.000061273575,-0.005054474,0.02645874,0.013839722,0.03375244,0.007843018,0.03060913,-0.031311035,0.027008057,-0.021316528,-0.0074691772,0.016662598,-0.023086548,-0.017410278,-0.026397705,-0.026489258,0.041625977,0.0056381226,-0.0052871704,-0.028747559,-0.02670288,0.0042877197,-0.047607422,0.008613586,0.062347412,0.035888672,-0.0027179718,0.014480591,0.002462387,-0.007537842,-0.009178162,0.00010693073,-0.0158844,0.029373169,0.013298035,0.0016822815,-0.025527954,-0.00617218,-0.02859497,0.009124756,-0.056549072,-0.04611206,-0.010269165,-0.0031166077,-0.0090789795,0.015655518,-0.020462036,-0.0035800934,-0.00831604,-0.036346436,0.02029419,-0.0066184998,-0.00087833405,-0.00026631355,-0.030715942,0.0019197464,0.0043640137,0.001871109,0.04840088,0.0107803345,-0.030685425,-0.028457642,0.013870239,0.008216858,0.024291992,0.0039863586,-0.024719238,0.013473511,-0.018630981,-0.060791016,-0.016464233,-0.008781433,-0.010314941,-0.015571594,-0.003370285,-0.037963867,0.0018587112,-0.031585693,0.00289917,0.0140686035,0.009902954,-0.0037288666,0.0124053955,0.017608643,-0.009300232,-0.0076179504,-0.04812622,0.011764526,0.011260986,-0.0048446655,0.01979065,0.056121826,-0.018493652,-0.024765015,-0.011665344,0.004589081,0.023834229,-0.024215698,0.018585205,0.015930176,-0.0041999817,0.0015258789,-0.013183594,-0.017868042,-0.0055351257,0.073913574,0.016494751,0.0018119812,-0.018600464,-0.010444641,0.02848816,0.021316528,-0.026504517,-0.012565613,-0.037506104,0.0041923523,-0.013473511,0.026062012,-0.008171082,0.026641846,-0.013809204,-0.043151855,-0.012992859,0.01348114,-0.02104187,-0.07318115,-0.021453857,-0.046539307,0.0033740997,-0.021560669,-0.021896362,0.006679535,0.0340271,-0.029769897,-0.08074951,-0.0026569366,0.008277893,-0.020202637,0.021987915,-0.014930725,0.011070251,0.015426636,-0.052124023,0.0155181885,0.029129028,-0.0362854,-0.010658264,-0.0019483566,-0.0001436472,0.00078582764,-0.02180481,-0.0051460266,-0.0034599304,0.0036201477,-0.037597656,0.0023994446,-0.011421204,0.01486969,-0.014198303,0.017410278,-0.020523071,0.0026493073,0.05593872,-0.052581787,0.024108887,0.025131226,0.0060310364,-0.004135132,0.007972717,0.019699097,-0.039611816,0.0034732819,0.02368164,0.0010414124,0.043395996,-0.024169922,0.0141067505,0.025390625,-0.017059326,0.0036411285,-0.020095825,-0.0066833496,-0.051635742,-0.020370483,0.022781372,-0.007610321,0.016021729,-0.022247314,-0.009178162,-0.0022888184,0.013694763,-0.005138397,-0.019699097,-0.015235901,-0.03338623,0.003408432,-0.014526367,-0.00093364716,-0.019714355,0.022918701,-0.011459351,0.046966553,0.0015859604,-0.00995636,0.0028076172,0.0345459,0.0057411194,-0.0024433136,0.013908386,0.022323608,0.030395508,0.012229919,0.004749298,-0.048553467,-0.035095215,-0.022567749,-0.010910034,0.016235352,-0.010551453,-0.0098724365,0.029418945,0.008171082,-0.009109497,-0.03479004,0.00920105,-0.03250122,-0.019302368,0.018493652,-0.021865845,0.028915405,0.01676941,-0.013473511,0.022598267,-0.00078105927,0.052001953,0.0056266785,0.004501343,0.030761719,0.03741455,0.022354126,-0.025558472,0.008140564,-0.009460449,-0.004283905,-0.009963989,-0.007282257,0.0015592575,0.022613525,-0.023666382,-0.009941101,0.021591187,0.0025043488,-0.0066986084,0.02708435,0.013999939,0.030548096,-0.00050735474,0.036346436,-0.046417236,0.037506104,0.022659302,-0.011413574,-0.016693115,0.008140564,-0.03086853,0.013084412,0.007671356,-0.013626099,0.038848877,-0.016571045,0.034210205,-0.015113831,-0.0009946823,0.012008667,-0.019973755,-0.0058021545,0.032348633,-0.004924774,-0.01348114,0.0048980713,-0.024765015,0.02909851,-0.04663086,0.032348633,-0.019485474,-0.011940002,-0.0038261414,-0.0256958,-0.038238525,0.007820129,-0.0074501038,-0.014091492,0.004043579,0.036132812,0.0054969788,0.048095703,0.047454834,0.019683838,0.016677856,-0.020141602,-0.034301758,0.012245178,-0.006225586,0.042053223,-0.0087509155,0.026672363,0.04901123,-0.003698349,0.029586792,0.034179688,0.029968262,0.015113831,0.010749817,-0.005619049,0.0024528503,0.00031256676,0.008308411,0.011161804,0.05203247,-0.028945923,0.020462036,0.024642944,0.021453857,-0.014373779,0.040802002,0.07244873,0.000012218952,-0.0076179504,0.03778076,-0.012176514,-0.027572632,-0.005695343,-0.027069092,0.048706055,0.0036754608,0.04611206,0.043914795,0.024551392,0.0079956055,0.0054130554,-0.014038086,-0.01991272,0.03540039,0.011245728,-0.015434265,-0.015571594,-0.018203735,-0.0029258728,-0.02180481,-0.029586792,0.0066108704,-0.015129089,-0.000023543835,-0.016571045,0.012145996,-0.011116028,0.011856079,0.028213501,0.015304565,-0.0066986084,0.03289795,0.0068855286,-0.008956909,0.020858765,-0.00818634,0.0463562,-0.012741089,-0.026000977,-0.0009975433,0.0135650635,-0.005455017,-0.031311035,0.004878998,0.0055122375,0.053527832,0.042999268,-0.021606445,0.015144348,0.021530151,0.022247314,0.0112838745,0.04949951,0.016296387,0.02267456,0.018173218,0.028808594,0.02281189,-0.017105103,0.0140686035,-0.013031006,0.016601562,-0.007545471,0.008132935,0.006450653,-0.019348145,0.025802612,-0.0066223145,0.0032672882,0.025512695,0.029418945,-0.0116119385,-0.023040771,-0.0002989769,0.0028095245,-0.005214691,-0.0038700104,0.020462036,-0.019363403,0.012962341,0.015930176,0.035827637,-0.013946533,0.033477783,0.016784668,-0.022232056,0.0034866333,0.021316528,-0.030471802,0.012031555,-0.011909485,-0.0034103394,-0.046417236,0.038146973,0.02154541,-0.021316528,0.025970459,0.008544922,-0.007610321,-0.0027751923,0.02923584,0.01902771,0.0124053955,0.0053749084,-0.0012960434,0.050354004,0.05569458,0.010635376,0.0010681152,-0.006832123,-0.015022278,-0.017807007,-0.014526367,-0.018096924,0.0037822723,0.0007209778,-0.020477295,0.005908966,0.018081665,-0.006877899,0.043670654,-0.009399414,0.0076904297,0.010650635,0.028457642,0.0115356445,-0.015274048,-0.0024223328,-0.006614685,-0.013023376,0.04333496,0.031188965,0.020004272,0.03753662,-0.01335144,-0.005886078,-0.0079193115,0.0035743713,0.018249512,-0.01461792,0.021499634,0.005508423,0.0010795593,-0.0234375,-0.045715332,0.011138916,-0.015823364,-0.027648926,-0.025894165,0.009117126,0.0072135925,0.02279663,0.026901245,0.03375244,-0.011581421,0.06677246,-0.00088596344,0.067871094,-0.0088272095,-0.0055007935,0.041748047,0.038635254,0.028839111,0.014297485,0.028915405,-0.02432251,0.030334473,0.022262573,0.018951416,0.009483337,0.010406494,-0.0034999847,0.035827637,-0.014190674,0.031280518,-0.020263672,0.009674072,0.014312744,0.0059013367,-0.020568848,0.004070282,0.0042419434,0.026611328,0.022201538,-0.021697998,-0.008026123,-0.0052261353,-0.0062294006,0.034118652,-0.014335632,-0.010688782,-0.00390625,-0.0011196136,0.00018453598,-0.03579712,-0.011703491,0.0055389404,0.011512756,-0.05078125,-0.0066604614,0.010185242,0.004878998,-0.019515991,0.006187439,0.019821167,0.005558014,0.000688076,0.041534424,-0.015258789,0.036834717,-0.008216858,0.025726318,0.037078857,0.0009803772,-0.01713562,-0.003944397,-0.00623703,-0.032562256,0.02017212,0.037231445,-0.01940918,0.005355835,0.011367798,-0.018630981,0.0023441315,-0.016036987,-0.011177063,0.0051116943,-0.005279541,-0.011672974,-0.027862549,0.016784668,-0.0073242188,0.012199402,-0.011726379,-0.00919342,0.020263672,0.039276123,0.0050735474,-0.029052734,-0.0034637451,-0.0018072128,0.014259338,-0.028518677,-0.032440186,-0.008239746,-0.034301758,0.01928711,-0.0019359589,0.0069122314,0.021911621,-0.021621704,0.0019359589,0.01991272,0.0003478527,0.016479492,-0.0140686035,-0.0082092285,0.008102417,-0.020263672,0.0082092285,-0.029052734,-0.014038086,0.014427185,0.031585693,0.021255493,-0.013473511,0.035308838,-0.012229919,0.008666992,0.0033817291,-0.007972717,0.033996582,-0.02796936,-0.002872467,-0.007820129,0.024291992,-0.01537323,-0.010971069,-0.001288414,0.037384033,0.04272461,-0.004814148,-0.0073509216,0.04434204,0.012809753,-0.0068855286,0.046081543,0.010467529,0.04473877,0.029312134,-0.036376953,-0.021743774,0.019439697,0.0015516281,0.0036182404,0.025466919,-0.023986816,-0.028167725,0.00969696,0.019119263,-0.0062446594,-0.0129470825,-0.026306152,-0.01864624,-0.026062012,0.012962341,-0.007659912,0.010185242,-0.0069999695,-0.00819397,-0.003490448,-0.03237915,-0.055725098,-0.012626648,-0.002275467,-0.01663208,-0.05142212,0.01689148,-0.0287323,0.00011199713,-0.036102295,-0.0010976791,-0.01436615,0.03805542,-0.011810303,0.0035438538,0.013183594,0.003774643,0.0149383545,0.008277893,0.026657104,-0.016967773,-0.031982422,-0.0010070801,0.00028681755,-0.004421234,0.0209198,-0.0023269653,0.027008057,0.014793396,-0.018966675,0.0014972687,0.0024318695,-0.03137207,0.0037555695,-0.032043457,-0.0026931763,0.020629883,0.0017900467,0.016906738,-0.0051498413,0.025253296,-0.011489868,-0.0044898987,0.036621094,0.04586792,-0.0013589859,0.022109985,-0.00008672476,-0.0039787292,-0.010368347,0.0041122437,-0.012908936,0.0008740425,0.0037384033,-0.0024471283,-0.00365448,0.011856079,0.018661499,-0.017425537,-0.030181885,0.014724731,0.014160156,0.0048294067,0.02658081,0.01272583,-0.0036754608,-0.013641357,-0.01259613,0.0013828278,0.050994873,0.022567749,-0.012702942,-0.000071287155,-0.016326904,0.0051994324,0.0061416626,0.007007599,-0.025024414,-0.029724121,-0.0001026988,-0.01713562,0.0128479,-0.005970001,0.0007138252,-0.01259613,0.016098022,0.014190674,-0.04244995,-0.007572174,0.012039185,0.034118652,0.0018577576,-0.030792236,-0.013633728,0.0065460205,-0.010772705,-0.020339966,-0.03805542,-0.030258179,0.017547607,-0.02079773,0.004878998,-0.015609741,-0.005672455,-0.0058898926,-0.0064201355,0.0056915283,0.011703491,0.019165039,-0.01612854,0.015434265,0.021224976,0.008392334,-0.0126953125,0.016738892,-0.024612427,0.002166748,0.024597168,0.013542175,0.011665344,-0.03643799,0.031402588,-0.00047278404,-0.00522995,0.028427124,0.009483337,0.026016235,-0.050109863,0.0034503937,0.0070533752,0.0037117004,0.044311523,-0.009635925,-0.04071045,0.0013608932,-0.021728516,-0.024887085,0.013549805,0.013870239,0.04888916,-0.015899658,0.018203735,-0.005748749,-0.025283813,-0.010810852,0.0065345764,-0.008361816,-0.00012457371,0.01626587,0.014480591,0.005683899,-0.012123108,-0.0025749207,-0.024520874,-0.012718201,0.020217896,-0.0011892319,0.009025574,0.027374268,0.025726318,0.0446167,0.022155762,0.023086548,0.014015198,-0.020996094,0.0003437996,0.0033550262,0.052490234,0.004627228,-0.020904541,0.024230957,0.0013933182,-0.027450562,-0.016464233,-0.015701294,-0.0059013367,-0.017089844,0.027816772,0.0025138855,0.017166138,-0.012893677,0.010604858,-0.018112183,0.0037460327,-0.019378662,-0.010475159,-0.021972656,-0.0124435425,0.014160156,-0.007537842,0.023468018,0.017852783,-0.01234436,0.025970459,0.040100098,-0.017532349,-0.012268066,-0.018096924,0.007888794,0.010795593,0.019363403,0.0140686035,-0.014816284,-0.023498535,0.012565613,-0.007282257,0.025039673,-0.014671326,0.028518677,0.020507812,-0.004421234,0.00040745735,0.035491943,-0.024658203,-0.017684937,-0.0033855438,0.01171875,0.047058105,0.03050232,-0.0035133362,0.02154541,0.01977539,-0.042297363,0.04977417,-0.0061302185,0.027755737,-0.024017334,0.009117126,-0.04006958,-0.02041626,-0.0021820068,0.0033626556],"createdAt":"2026-04-21T18:32:24.668Z","updatedAt":"2026-04-23T02:02:21.451Z","lastSeenAt":"2026-04-23T02:02:21.451Z","tsv":"'/api/v1/lab/results/77':159 '/request':17,34 '0.02':16,33,83,142 '000':78 '0x8335':70 '20':77 '2913':71 '402':204 '6':88 '77':48 'Base network API' 'USDC micropayment API' 'accept':54 'access':40,178 'advertis':94 'ai':111 'analysi':115 'analyt':105 'api':102,147,177 'base':9,26,65,79 'base-network' 'behind':49 'bodi':185 'broader':91 'call':4,21,101 'catalog':167 'challeng':205 'classif':118 'commit':155 'confirm':198 'contract':69 'convers':135 'cost':75 'crawl':194 'data':104,108 'decim':89 'document':186 'embed':119 'endpoint':7,24,36,138,158,196 'equal':82 'estim':129 'exact':170 'exampl':188 'exchang':124 'export':109 'feed':123 'financ':120 'found':191 'gas':128 'generat':136 'generic':180 'geocod':133 'homepag':165 'id':47 'infrastructur':131 'insight':110 'json':59 'json-response' 'key':148 'lab':5,22,44 'lab results API' 'lab-results' 'learn':113 'limit':151 'list':140,162 'live':199 'lowpaymentfee' 'lowpaymentfee.com':38,92 'machin':112 'maximum':74 'metric':106 'minimum':154 'network':66 'no-api-key' 'openapi':182 'pay':2,19,99 'pay-per-cal':1,18,98 'pay-per-call' 'pay-per-request API' 'payment':60 'paywal':52 'per':3,20,84,100,143 'platform':93 'post':55 'premium':176 'price':122 'provid':39 'purpos':171 'quot':127 'rate':125,150 'report':107 'request':56,85,144,184 'resourc':46 'respons':189 'result':6,23,45 'return':58 'schema':183 'sentiment':114 'settl':12,29,62 'span':103 'specif':43,157 'suit':96 'summar':117 'text':116 'titl':175 'token':126 'unclear':173 'unit':80 'usdc':14,31,68,86 'usdc-settlement' 'use':67,87 'util':132 'valid':134,202 'via':10,27,200 'web3':121 'x402':11,28,51,203 'x402 paid endpoint' 'x402-payment'","prices":[{"id":"415f72c1-abd5-4a5b-aa65-18089298c85d","listingId":"050b0963-a266-4036-b699-6263068e6b68","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/77","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.668Z"}],"sources":[{"listingId":"050b0963-a266-4036-b699-6263068e6b68","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/77","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.668Z","lastSeenAt":"2026-04-23T02:02:21.451Z"}],"details":{"listingId":"050b0963-a266-4036-b699-6263068e6b68","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/77 \\\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 20,000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/77"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/77"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving lab result data (ID 77) via a single micropayment","Demonstrating x402 payment protocol integration on Base","Agent-driven data retrieval with per-call USDC settlement"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need pay-per-call data access without API keys","Low-cost one-off data retrieval settled on Base"],"notFor":["Bulk data retrieval requiring thousands of calls (no batch endpoint documented)","Users who need detailed documentation or OpenAPI specs before integrating","Anyone seeking a well-documented, production-grade lab information system"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.767Z"},"updatedAt":"2026-04-23T02:02:21.451Z"}}