{"id":"d3575eba-6c75-4726-83cc-26777420f8ab","shortId":"NkPV5f","kind":"x402","title":"Pay-per-call lab results endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call lab results endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides \"Premium API Access\" for lab results data at the path `/api/v1/lab/results/50`. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the x402 \"exact\" scheme. The 402 challenge advertises a `maxAmountRequired` of 20,000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint accepts HTTP POST requests and returns `application/json` responses. A 300-second payment timeout is configured.\n\nThe specific endpoint `/api/v1/lab/results/50` is labeled \"Premium API Access\" but no further documentation describes the shape of the request body or the response payload. The provider's landing page lists this endpoint's category neighbors (analytics, AI, finance, utilities) but does not include this particular path in its public catalog, so the exact data returned is unclear. There is no OpenAPI spec, no README content, and no example payloads available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","lab-results"],"categories":["data","api-infrastructure"],"synonyms":["lab results API","x402 micropayment API","pay-per-call data","lowpaymentfee","USDC API access","Base network API","402 payment endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The specific path /api/v1/lab/results/50 is not listed on the provider's public catalog page — its exact purpose and response format are unknown","No example request or response payloads are available","The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/50","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/50","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a generic landing page, and the specific purpose of '/api/v1/lab/results/50' is undocumented. 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":"2026-04-21T22:37:39.524Z","embedding":[-0.014984131,-0.03488159,0.05328369,0.01838684,0.008865356,-0.025131226,-0.028427124,0.022720337,0.056427002,-0.08355713,0.02809143,-0.04220581,-0.017944336,-0.052642822,-0.028427124,0.007133484,0.012557983,0.0256958,-0.048858643,0.017303467,0.019012451,-0.036254883,-0.021209717,0.0028629303,-0.023956299,-0.04574585,0.009246826,-0.015113831,-0.020126343,-0.049621582,0.028121948,-0.026397705,-0.0071144104,0.015716553,-0.039093018,0.014694214,0.010925293,0.035949707,0.0051994324,-0.023956299,-0.011741638,-0.05142212,-0.0047340393,0.0071792603,-0.049957275,-0.0033340454,0.009628296,-0.037384033,0.021362305,-0.018493652,-0.036895752,-0.0069389343,-0.009979248,-0.012931824,0.0073890686,0.011764526,0.013420105,-0.0028533936,0.018234253,0.010047913,0.008331299,-0.049713135,-0.01084137,-0.009559631,-0.005645752,0.058776855,-0.010917664,0.04360962,0.025543213,0.044647217,0.042236328,0.05670166,-0.0052261353,0.027389526,-0.021133423,-0.008331299,-0.0018587112,0.07366943,-0.018936157,-0.03933716,-0.013977051,-0.02204895,-0.0020523071,0.009979248,-0.00075387955,-0.03515625,-0.01574707,0.011009216,-0.020355225,0.031173706,-0.07055664,-0.034332275,0.0030212402,0.030471802,0.014945984,0.0034980774,-0.0121536255,0.0178833,-0.02268982,0.012634277,0.0040359497,-0.032165527,0.020095825,0.0088272095,0.026306152,0.039794922,-0.003540039,0.024459839,0.0074005127,-0.016021729,-0.004299164,0.011054993,-0.025878906,0.0031604767,-0.0022830963,0.015510559,-0.019699097,0.01689148,-0.021728516,0.012939453,-0.043121338,0.062286377,0.0072784424,-0.026931763,0.013885498,-0.02696228,0.009559631,-0.006038666,0.005126953,-0.011566162,0.02911377,0.004432678,0.0206604,-0.0059661865,-0.03793335,0.018859863,-0.030853271,-0.02229309,-0.051116943,-0.056762695,0.034423828,-0.010025024,0.066711426,0.026290894,-0.07281494,-0.00598526,-0.02507019,0.017623901,-0.020309448,-0.00043606758,-0.003276825,0.039764404,-0.03744507,0.009048462,-0.027572632,-0.015464783,0.025390625,0.030838013,-0.03955078,0.03616333,0.005092621,0.025009155,0.02027893,0.0029678345,0.03805542,0.044311523,-0.0046691895,-0.0715332,-0.095703125,-0.013793945,-0.018463135,-0.0259552,-0.025802612,0.0048942566,-0.013465881,-0.047302246,-0.002527237,-0.010040283,0.012901306,-0.047607422,-0.004535675,-0.036712646,0.0049362183,-0.0071792603,-0.060150146,-0.032348633,-0.02520752,0.07318115,0.024658203,0.010673523,0.037719727,-0.019836426,0.048065186,0.026153564,-0.032806396,-0.016693115,0.031707764,-0.021972656,0.010383606,-0.004211426,-0.0069618225,-0.020751953,0.03353882,0.05670166,0.007499695,-0.023483276,-0.02645874,-0.05419922,-0.022766113,-0.029754639,0.021102905,0.014282227,0.012016296,0.05847168,-0.025146484,-0.021881104,-0.014266968,0.01889038,0.016860962,0.04852295,0.0256958,-0.004547119,0.036315918,-0.0020580292,-0.056915283,0.038330078,0.03302002,-0.0017881393,-0.017440796,-0.045715332,0.019927979,0.027297974,-0.022705078,0.0105896,-0.011871338,0.03265381,-0.0024108887,0.01777649,0.02508545,-0.023025513,-0.032684326,-0.03451538,-0.008888245,0.03665161,0.0049934387,-0.03805542,-0.03741455,-0.10180664,0.04788208,0.04562378,0.021240234,-0.017410278,0.024810791,-0.05392456,-0.020767212,-0.043029785,0.0395813,0.034942627,-0.02557373,-0.037994385,0.01838684,-0.012451172,-0.02758789,-0.0058021545,-0.014465332,-0.035888672,-0.017303467,0.019104004,-0.0690918,-0.0053215027,0.027770996,0.012199402,0.040985107,-0.023788452,-0.028747559,-0.017669678,-0.008918762,0.026565552,-0.021255493,-0.003396988,-0.034423828,0.0413208,0.006160736,-0.021240234,0.02178955,-0.015853882,-0.002937317,-0.023635864,0.0030956268,-0.008621216,-0.018936157,0.015350342,0.01902771,-0.06665039,0.013031006,-0.0056648254,0.0836792,-0.04360962,0.046447754,-0.0035495758,-0.0034389496,0.04714966,0.0030975342,-0.055145264,0.008903503,0.030838013,0.025390625,0.02835083,-0.008232117,-0.034576416,-0.017074585,0.062347412,-0.0051193237,-0.018295288,-0.005420685,0.008636475,0.028823853,-0.012176514,-0.06817627,-0.032287598,-0.012496948,-0.038909912,0.034820557,-0.017913818,0.0017652512,0.011024475,0.00818634,-0.032440186,-0.005256653,-0.017623901,0.010307312,-0.018417358,0.0073013306,-0.0050964355,0.023803711,0.020370483,0.00027394295,-0.00024211407,0.011665344,0.062347412,-0.0035305023,-0.019851685,-0.033447266,-0.0069770813,0.005428314,-0.005783081,0.030853271,0.015556335,0.005607605,0.028793335,-0.029922485,0.005264282,0.024841309,0.028686523,0.019485474,-0.0074920654,0.0015687943,-0.08227539,-0.035369873,-0.03387451,-0.066345215,0.02986145,0.027572632,0.010032654,0.037322998,0.0019626617,-0.046447754,-0.04034424,0.033721924,-0.040039062,0.011779785,0.039764404,0.0037269592,-0.022583008,-0.004169464,-0.00504303,0.01222229,0.041625977,0.023849487,0.030517578,0.086364746,0.056488037,-0.0024471283,0.020599365,0.036712646,0.03274536,-0.018615723,-0.0017700195,-0.03842163,-0.011878967,-0.00091028214,-0.025268555,-0.017074585,-0.07293701,0.055389404,0.044433594,0.06124878,0.0259552,0.008674622,0.036712646,-0.007801056,0.0018424988,-0.02861023,-0.010513306,0.001291275,-0.061035156,0.026168823,-0.004776001,0.025024414,-0.027664185,0.02494812,-0.0066871643,0.020324707,-0.03161621,0.048675537,-0.009819031,0.01966858,0.037017822,0.005996704,0.037597656,0.06439209,-0.034088135,0.042510986,0.019165039,-0.030838013,-0.0016479492,0.048187256,-0.016937256,-0.022354126,-0.05050659,-0.042633057,0.0063591003,-0.02027893,-0.049987793,-0.02078247,0.014923096,-0.00090646744,0.02720642,-0.03768921,-0.024124146,0.00919342,0.0046920776,-0.041900635,-0.004627228,-0.043670654,0.028564453,0.013343811,-0.020599365,-0.0030345917,0.0002092123,0.015129089,-0.012390137,0.0057678223,0.03366089,-0.019363403,-0.04324341,0.017684937,-0.02078247,0.025756836,-0.005218506,0.04522705,-0.010353088,0.04525757,0.045196533,-0.0037631989,-0.01071167,-0.05340576,0.016860962,-0.058380127,-0.0012931824,0.019607544,-0.043945312,-0.0020008087,-0.011276245,-0.032562256,0.0037975311,-0.0037956238,-0.042633057,-0.006126404,0.015586853,-0.0038928986,-0.028762817,-0.037872314,-0.031951904,-0.022659302,0.05847168,0.013168335,-0.0077590942,-0.076049805,-0.023223877,0.046936035,0.0044784546,0.011932373,-0.014556885,-0.022567749,-0.0020542145,-0.042907715,0.024124146,-0.01071167,0.03479004,0.003189087,-0.004814148,0.019119263,0.013824463,0.0385437,0.011405945,0.0028076172,0.050598145,-0.027908325,0.015777588,-0.011924744,0.055541992,0.0151901245,-0.020858765,-0.057495117,0.02986145,0.004951477,0.019927979,-0.03149414,0.009765625,-0.012786865,0.011123657,0.0044403076,-0.015808105,-0.02078247,-0.013885498,-0.052856445,-0.068847656,0.03933716,-0.007347107,0.022216797,0.014541626,0.0013513565,0.020339966,0.009239197,-0.027069092,0.049316406,-0.016143799,-0.022155762,-0.051696777,-0.027038574,-0.025115967,-0.012397766,-0.015037537,0.015457153,-0.023651123,0.01828003,0.011703491,-0.0039901733,0.01537323,0.0054092407,-0.011985779,0.02558899,0.0077934265,0.01020813,0.02897644,0.0121536255,-0.041412354,0.009216309,0.00806427,-0.00017607212,0.0043144226,0.042053223,0.012168884,-0.017471313,0.0077934265,0.0016260147,-0.028900146,-0.035827637,0.0112838745,0.005443573,0.016662598,0.0005631447,-0.021881104,0.01727295,0.025527954,-0.044403076,-0.007701874,0.02168274,0.012466431,-0.022827148,-0.0027313232,0.030227661,0.03842163,-0.012374878,0.010940552,0.006008148,0.030029297,0.03970337,0.017120361,-0.0042915344,0.018936157,0.0067596436,0.025604248,-0.007080078,-0.016540527,0.02331543,-0.011756897,0.03427124,0.008125305,-0.0034065247,-0.0016584396,-0.010124207,-0.010566711,0.009712219,-0.014083862,0.012466431,0.029083252,0.024124146,-0.028381348,0.022979736,-0.0012607574,-0.03149414,-0.018234253,0.02456665,0.039398193,-0.03048706,-0.020065308,0.01727295,0.0018939972,0.026779175,-0.03955078,-0.022201538,-0.0023212433,0.01574707,-0.029083252,-0.034454346,-0.034332275,-0.014060974,0.02532959,0.018218994,0.033233643,0.025222778,-0.012420654,0.004272461,0.018081665,-0.0014352798,-0.012435913,-0.010574341,-0.035858154,0.01826477,0.014137268,-0.0057640076,-0.043304443,0.0028038025,-0.02520752,-0.025100708,-0.007686615,-0.01625061,-0.010070801,-0.018707275,0.013969421,0.02406311,0.0014533997,0.0012216568,-0.014045715,-0.038116455,-0.0064430237,0.025115967,0.0053253174,-0.041137695,0.019195557,-0.013031006,-0.004333496,0.0023212433,0.033325195,0.02368164,0.034423828,0.01197052,0.028503418,-0.02671814,0.03265381,-0.031036377,0.0003130436,0.010253906,-0.026260376,-0.016525269,-0.025436401,-0.025268555,0.04949951,0.008056641,-0.00573349,-0.027069092,-0.026504517,0.0024261475,-0.046173096,0.015853882,0.06652832,0.035491943,-0.009643555,0.017791748,0.001042366,-0.005508423,-0.023971558,0.0032749176,-0.010978699,0.022506714,0.00969696,0.0010023117,-0.018310547,-0.00982666,-0.02394104,0.007144928,-0.055541992,-0.04864502,-0.010131836,-0.012626648,-0.0104904175,0.020828247,-0.0284729,-0.00983429,-0.009925842,-0.041870117,0.01637268,-0.006275177,0.0061683655,0.011505127,-0.022735596,-0.00844574,0.011047363,-0.0071640015,0.044158936,-0.010421753,-0.019851685,-0.031173706,0.007972717,0.033966064,0.025024414,0.0043182373,-0.022460938,0.021865845,-0.016204834,-0.067993164,-0.010826111,-0.009880066,-0.004676819,-0.009559631,-0.008140564,-0.04333496,0.004673004,-0.03250122,-0.00080013275,0.013198853,0.017868042,0.0010280609,0.019577026,0.012878418,-0.0048599243,-0.01701355,-0.04724121,0.008895874,0.010688782,0.0023517609,0.018753052,0.06021118,-0.014923096,-0.023239136,-0.01197052,-0.001209259,0.0129852295,-0.024246216,0.0040626526,0.009681702,0.004825592,-0.0014667511,-0.019195557,-0.022140503,-0.020217896,0.07446289,0.006023407,0.0018539429,-0.006629944,-0.0025196075,0.030853271,0.031036377,-0.031951904,-0.005924225,-0.033691406,0.010063171,-0.014961243,0.031036377,-0.005680084,0.033111572,-0.012565613,-0.04296875,-0.014633179,0.008682251,-0.020370483,-0.07019043,-0.026138306,-0.053833008,0.003206253,-0.028533936,-0.0043563843,0.004383087,0.028503418,-0.03048706,-0.07635498,-0.0050964355,0.014892578,-0.009506226,0.0105896,-0.02520752,0.0061454773,0.014984131,-0.048858643,0.0017671585,0.036376953,-0.037261963,-0.0035076141,-0.009788513,0.010612488,-0.011657715,-0.008033752,0.007030487,0.0056419373,0.01109314,-0.04006958,0.009765625,-0.0181427,0.01109314,-0.017837524,0.025680542,-0.010826111,-0.009796143,0.049194336,-0.048797607,0.024749756,0.031677246,0.010673523,0.0023651123,0.012329102,0.012283325,-0.03201294,-0.0075531006,0.025970459,0.005584717,0.038970947,-0.019470215,0.027572632,0.015731812,-0.024047852,0.011672974,-0.018310547,-0.005050659,-0.055877686,-0.025390625,0.014671326,-0.012367249,0.017227173,-0.017852783,0.0007276535,-0.0023708344,0.009544373,-0.0044403076,-0.01637268,-0.01373291,-0.033843994,0.010917664,-0.008972168,-0.0032978058,-0.00806427,0.022216797,0.00088500977,0.043823242,0.0054473877,-0.01209259,0.0018339157,0.026443481,-0.00090408325,0.0010681152,0.011962891,0.011962891,0.03717041,0.00969696,0.0033130646,-0.061553955,-0.024490356,-0.020263672,-0.0069122314,0.011756897,-0.0102005005,-0.0052833557,0.023925781,0.0053977966,-0.005760193,-0.03491211,0.016525269,-0.03567505,-0.018295288,0.007572174,-0.027252197,0.023834229,0.0284729,-0.0025787354,0.026245117,0.003566742,0.046325684,0.010284424,0.015281677,0.046020508,0.031433105,0.021209717,-0.02607727,0.012413025,-0.008926392,-0.0041999817,-0.012283325,-0.011177063,0.00034165382,0.02229309,-0.024871826,-0.0049858093,0.011924744,0.0021781921,-0.0016040802,0.019500732,0.016143799,0.02268982,-0.010009766,0.033203125,-0.040161133,0.029296875,0.020812988,-0.020950317,-0.0158844,0.0124053955,-0.021087646,0.005958557,0.0073547363,-0.012969971,0.034576416,-0.013183594,0.031951904,-0.027938843,-0.013206482,0.0060768127,-0.033325195,-0.008071899,0.022949219,-0.009017944,-0.016357422,0.014709473,-0.030929565,0.028274536,-0.043548584,0.030441284,-0.013031006,-0.0004208088,-0.0009813309,-0.022628784,-0.044403076,0.0065612793,-0.014190674,-0.007537842,-0.0030441284,0.035461426,0.017715454,0.03878784,0.047454834,0.012207031,0.0074386597,-0.029190063,-0.04156494,0.016647339,-0.013061523,0.032165527,0.0029125214,0.034332275,0.04699707,-0.003036499,0.022476196,0.03756714,0.031341553,0.008094788,0.0037193298,0.00014483929,0.0032863617,-0.008239746,0.015235901,0.013137817,0.05508423,-0.037017822,0.019485474,0.02798462,0.017913818,-0.016921997,0.045898438,0.071777344,0.006286621,-0.0143585205,0.040771484,-0.0118255615,-0.02609253,-0.006298065,-0.021011353,0.047698975,0.0025196075,0.049041748,0.04168701,0.0209198,0.0019369125,0.0158844,-0.017944336,-0.017608643,0.04510498,0.0063705444,-0.013717651,-0.01776123,-0.005596161,-0.004673004,-0.03302002,-0.024337769,0.012145996,-0.003370285,-0.016830444,-0.00091552734,0.008834839,-0.0044784546,0.017501831,0.026260376,0.016342163,-0.0118255615,0.02986145,0.0068588257,-0.007675171,0.023254395,-0.0061416626,0.036865234,-0.014228821,-0.033966064,0.005619049,0.021499634,-0.0059165955,-0.020309448,0.008331299,0.005619049,0.04940796,0.034088135,-0.027297974,0.005859375,0.02645874,0.024230957,0.01902771,0.04714966,0.015510559,0.013641357,0.023925781,0.029678345,0.028640747,-0.024215698,0.013786316,-0.0087890625,0.007461548,-0.011352539,0.0043945312,-0.00068569183,-0.0206604,0.031280518,-0.005252838,0.005393982,0.02911377,0.028869629,-0.0060310364,-0.015945435,-0.0012998581,0.0026569366,-0.014060974,-0.0034751892,0.015014648,-0.008972168,0.021347046,0.017410278,0.028320312,-0.02168274,0.0345459,0.003025055,-0.013900757,0.0043678284,0.021774292,-0.04257202,0.0127334595,-0.012641907,-0.016921997,-0.040649414,0.027328491,0.0209198,-0.013641357,0.02835083,0.0047454834,-0.0021743774,-0.010734558,0.03286743,0.01876831,0.011138916,0.0051231384,-0.010505676,0.04598999,0.052886963,0.007713318,0.007068634,-0.016952515,-0.005290985,-0.015258789,-0.018081665,-0.01914978,0.007369995,-0.008926392,-0.027435303,0.0039863586,0.023147583,-0.0047912598,0.039154053,-0.0015096664,0.0033035278,0.004688263,0.036987305,0.012512207,-0.0020942688,-0.008766174,-0.0052375793,-0.019470215,0.042053223,0.025390625,0.011955261,0.025848389,-0.011413574,-0.006729126,-0.00579834,-0.004486084,0.024658203,-0.017471313,0.023712158,-0.00027489662,0.0005993843,-0.019256592,-0.0357666,0.016036987,-0.015113831,-0.018951416,-0.022064209,0.016204834,0.0067214966,0.023483276,0.03540039,0.026641846,-0.012397766,0.06451416,-0.008712769,0.06365967,-0.0077209473,-0.00674057,0.040740967,0.040008545,0.03643799,0.012428284,0.038848877,-0.019042969,0.02861023,0.035339355,0.01739502,0.0096588135,0.004131317,-0.010360718,0.047912598,-0.0063934326,0.03262329,-0.017868042,0.0090789795,0.004421234,-0.0059890747,-0.01499939,0.006904602,-0.0044555664,0.02696228,0.026931763,-0.02784729,-0.010864258,-0.010917664,-0.0043258667,0.042419434,-0.010192871,-0.01499939,0.0031089783,-0.011192322,0.008605957,-0.037200928,-0.016647339,0.011421204,0.007205963,-0.052947998,-0.014831543,0.0068206787,0.0088272095,-0.02571106,0.011528015,0.019317627,-0.004764557,0.00036120415,0.035827637,-0.015899658,0.040649414,-0.014152527,0.027618408,0.038024902,0.013015747,-0.008056641,-0.0049057007,-0.0029697418,-0.029022217,0.012123108,0.037261963,-0.020996094,0.0031280518,0.012527466,-0.011566162,-0.0017242432,-0.0110321045,-0.009742737,0.0023899078,-0.008674622,-0.0039863586,-0.019165039,0.018005371,-0.005256653,0.0124435425,-0.017166138,-0.015914917,0.008972168,0.031951904,0.0041770935,-0.026992798,-0.00009459257,-0.0006122589,0.017700195,-0.027023315,-0.019851685,-0.0031223297,-0.0385437,0.01689148,0.00894928,0.0006084442,0.020462036,-0.012527466,-0.009719849,0.015838623,0.0035381317,0.016082764,0.0020809174,0.00041222572,0.015899658,-0.023361206,0.008842468,-0.023757935,-0.00447464,0.017837524,0.028427124,0.015464783,-0.014007568,0.029663086,-0.014198303,0.0029850006,-0.000078856945,-0.009147644,0.03640747,-0.032562256,-0.0035762787,-0.010444641,0.023025513,-0.015281677,-0.013061523,-0.011329651,0.0335083,0.04714966,-0.0054969788,-0.011482239,0.03451538,0.0073623657,0.002046585,0.04534912,0.005264282,0.048065186,0.022567749,-0.03567505,-0.02571106,0.010925293,-0.0048561096,-0.01209259,0.022460938,-0.018127441,-0.019561768,0.0065956116,0.019317627,-0.012969971,-0.020462036,-0.023605347,-0.011299133,-0.028533936,0.018753052,-0.007987976,0.011253357,-0.007381439,-0.01852417,0.006538391,-0.03387451,-0.047668457,-0.021057129,0.0040016174,-0.017425537,-0.046813965,0.015731812,-0.027145386,0.004508972,-0.03414917,0.0005784035,-0.004306793,0.03942871,-0.011878967,0.008079529,0.02798462,0.012283325,0.016845703,0.010505676,0.026168823,-0.022094727,-0.03048706,-0.009567261,0.0059013367,-0.006904602,0.018722534,0.0024662018,0.02696228,0.014564514,-0.004486084,0.003452301,0.0013437271,-0.019378662,0.0016803741,-0.030075073,-0.008277893,0.022064209,0.008026123,0.016998291,-0.008460999,0.030517578,-0.014198303,-0.009567261,0.037872314,0.04232788,0.0064849854,0.026428223,-0.0026893616,-0.008583069,-0.013153076,-0.0037975311,-0.014282227,0.0036354065,-0.0015115738,-0.0012073517,-0.012786865,0.0026741028,0.019088745,-0.016799927,-0.018417358,0.01737976,0.0072631836,-0.0021800995,0.021484375,0.017578125,-0.0077552795,-0.011100769,-0.02279663,0.0055389404,0.040496826,0.018615723,-0.019302368,-0.0051078796,-0.010131836,0.0040283203,0.0093307495,0.010215759,-0.021881104,-0.037139893,-0.008293152,-0.022735596,0.0211792,0.008377075,-0.00006121397,-0.00920105,0.018829346,-0.0050315857,-0.03616333,-0.0025787354,0.017654419,0.034423828,0.0038642883,-0.020889282,-0.01309967,0.015609741,-0.013282776,-0.015701294,-0.04537964,-0.038238525,0.008590698,-0.016723633,0.0184021,-0.005554199,-0.00299263,-0.0069503784,-0.008071899,0.007881165,0.0041046143,0.03817749,-0.015609741,0.0034923553,0.01737976,0.016799927,-0.021362305,0.019927979,-0.020568848,-0.002380371,0.020401001,0.00844574,0.007507324,-0.040222168,0.0423584,-0.012321472,-0.014251709,0.04043579,0.025131226,0.02758789,-0.042022705,0.007511139,0.0063476562,0.0013751984,0.03387451,-0.012390137,-0.03427124,0.0044059753,-0.015258789,-0.018920898,0.014465332,0.014266968,0.047058105,-0.018737793,0.012748718,-0.0071640015,-0.02331543,0.010131836,0.0010986328,-0.016052246,0.001115799,0.019989014,0.011802673,0.0019388199,-0.016571045,-0.0064888,-0.02027893,-0.0019607544,0.017715454,-0.0063476562,0.0035171509,0.020553589,0.018966675,0.036895752,0.019577026,0.020309448,0.019622803,-0.013305664,0.008651733,-0.0019626617,0.064086914,0.009216309,-0.024810791,0.019561768,0.004508972,-0.036315918,-0.0140686035,-0.006778717,-0.0021686554,-0.019470215,0.024475098,0.0074005127,0.025894165,-0.008850098,0.010437012,-0.022460938,0.004245758,-0.025848389,-0.008720398,-0.034179688,0.0027580261,0.022644043,-0.0004351139,0.014526367,0.017486572,-0.0143585205,0.029388428,0.05722046,-0.015281677,-0.026443481,-0.021209717,0.008392334,0.007843018,0.01486969,0.00687027,-0.013389587,-0.016189575,0.018112183,-0.01637268,0.019989014,-0.01802063,0.011947632,0.019592285,-0.00021803379,-0.0079956055,0.033843994,-0.010604858,-0.020217896,-0.008522034,0.0019388199,0.044952393,0.032989502,-0.00057172775,0.032104492,0.026687622,-0.036193848,0.053100586,-0.0030326843,0.021850586,-0.023788452,0.007827759,-0.039978027,-0.02293396,-0.0033512115,0.0036258698],"createdAt":"2026-04-21T18:32:24.528Z","updatedAt":"2026-04-23T02:02:21.232Z","lastSeenAt":"2026-04-23T02:02:21.232Z","tsv":"'/api/v1/lab/results/50':53,152 '/request':17,34 '0.02':16,33,81,128 '000':120 '0x8335':105 '20':119 '2913':106 '300':143 '402':113 '402 payment endpoint' '6':125 'Base network API' 'USDC API access' 'accept':134 'access':45,157 'advertis':115 'ai':185 'ai/ml':72 'analyt':71,184 'api':44,68,86,156 'application/json':140 'avail':218 'base':9,26,100,121 'base-network' 'bodi':168 'broader':59 'call':4,21,131 'catalog':198 'categori':182 'challeng':114 'commit':93 'configur':148 'content':213 'contract':104 'data':49,70,202 'decim':126 'describ':162 'document':161 'dozen':62 'enabl':38 'endpoint':7,24,39,133,151,180 'equal':127 'exact':110,201 'exampl':216 'financ':186 'finance/web3':74 'http':135 'includ':191 'infer':73 'infrastructur':76 'json-response' 'key':87 'lab':5,22,47 'lab results API' 'lab-results' 'label':154 'land':176 'limit':90 'list':178 'lowpaymentfee' 'lowpaymentfee.com':41 'maxamountrequir':117 'neighbor':183 'network':101 'no-api-key' 'offer':61 'openapi':209 'page':177 'part':56 'particular':193 'path':52,194 'pay':2,19,65 'pay-per-cal':1,18 'pay-per-call data' 'pay-per-request':64 'payload':172,217 'payment':95,145 'per':3,20,66,82,130 'platform':60 'post':136 'premium':43,155 'price':79 'provid':42,174 'public':197 'rate':89 'readm':212 'request':67,83,137,167 'requir':94 'respons':141,171 'result':6,23,48 'return':139,203 'scheme':111 'second':144 'settl':12,29,97 'shape':164 'span':69 'spec':210 'specif':150 'timeout':146 'unclear':205 'unit':122 'usd':129 'usdc':14,31,103 'usdc-settlement' 'use':102 'util':77,187 'via':10,27,107 'x402':11,28,37,109 'x402 micropayment API' 'x402-enabled':36 'x402-payment'","prices":[{"id":"a025a134-f854-4c7a-90f1-c2a63609d467","listingId":"d3575eba-6c75-4726-83cc-26777420f8ab","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/50","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.528Z"}],"sources":[{"listingId":"d3575eba-6c75-4726-83cc-26777420f8ab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/50","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.528Z","lastSeenAt":"2026-04-23T02:02:21.232Z"}],"details":{"listingId":"d3575eba-6c75-4726-83cc-26777420f8ab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/50 \\\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 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/50"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/lab/results/50"}],"useCases":["Retrieving lab or analytical results on a per-request payment basis without needing an API key","Integrating pay-per-call data access into autonomous agent workflows via x402","Accessing premium data endpoints with USDC micropayments on Base L2"],"bestFor":["Agents or applications that need keyless, pay-as-you-go API access","Developers wanting to test x402 payment flows with low-cost endpoints","Use cases requiring on-chain USDC settlement on Base for API calls"],"notFor":["Users who need detailed documentation or OpenAPI schemas before integrating","High-volume consumers who prefer subscription-based pricing over per-call payments","Anyone needing non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.993Z"},"updatedAt":"2026-04-23T02:02:21.232Z"}}