{"id":"5118c45a-c910-4f67-b937-2174b1b80d79","shortId":"gssfUM","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint `/api/v1/keys/86` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or subscriptions are required — each request is paid individually via the x402 payment protocol.\n\nThe platform advertises four categories of APIs: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02 per-request pricing.\n\nThe specific functionality behind the `/api/v1/keys/86` endpoint is unclear from the available documentation — it is labeled generically as \"Premium API Access\" and does not appear in the main catalog of named endpoints. There is no OpenAPI schema, no request/response examples, and the ancillary pages (pricing, README, /api) returned only a wallet-connect prompt with no additional documentation. Agents should treat this endpoint with caution until its actual behavior is clarified.","tags":[],"capabilities":["x402-payment","usdc-base-settlement","pay-per-request","no-api-key","json-response","http-post"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The endpoint '/api/v1/keys/86' does not appear in the site's published API catalog — its actual functionality is unknown","Ancillary pages (/pricing, /README, /api) returned only a wallet-connect prompt with no useful content","No request or response examples are available to verify what data this endpoint provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/keys/86","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/keys/86","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 explaining what `/api/v1/keys/86` actually returns. The endpoint name 'Premium API Access' is generic and doesn't match any of the named endpoints in the site catalog. 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":"2026-04-21T22:16:16.440Z","embedding":[-0.006248474,-0.027633667,0.04385376,0.016952515,0.012054443,-0.030227661,-0.03491211,0.030410767,0.0657959,-0.07519531,0.020996094,-0.04824829,-0.025360107,-0.036956787,-0.031173706,0.006164551,-0.022659302,-0.008018494,-0.05505371,0.023208618,0.016189575,-0.017333984,-0.018203735,0.03125,0.006164551,-0.012763977,0.0033836365,-0.039276123,-0.005455017,-0.04321289,0.06750488,-0.029281616,-0.015838623,0.014732361,-0.018157959,-0.02053833,0.004020691,0.02128601,0.026626587,-0.003736496,-0.010498047,-0.05267334,0.004638672,-0.0077552795,-0.044677734,-0.0013256073,-0.00014269352,-0.033111572,0.0052375793,-0.001531601,-0.03427124,-0.008285522,-0.005645752,-0.0012731552,0.014312744,0.016357422,-0.007041931,-0.007827759,0.020614624,0.0025310516,0.0018892288,-0.05947876,-0.018295288,0.009300232,-0.010917664,0.05014038,-0.019195557,0.055786133,0.0065689087,0.044952393,0.032196045,0.047088623,0.010368347,0.008094788,-0.010231018,-0.00040912628,-0.015464783,0.058410645,-0.009208679,-0.0050354004,-0.015960693,0.0018939972,-0.030883789,-0.001953125,-0.0095825195,-0.03427124,-0.023223877,-0.00907135,-0.018936157,0.019897461,-0.062561035,-0.031341553,-0.006462097,0.021270752,0.014450073,-0.008346558,-0.004261017,0.021575928,-0.008544922,0.024475098,-0.0032234192,-0.047729492,0.019897461,0.014778137,0.03842163,0.040222168,0.00274086,0.0184021,0.015365601,-0.007511139,-0.060302734,0.0042419434,-0.021942139,-0.0090789795,0.0057029724,0.0105896,-0.026611328,0.0051574707,-0.04144287,0.0010538101,-0.054748535,0.029388428,0.030670166,0.002960205,-0.002784729,-0.0496521,-0.02532959,0.028137207,-0.02368164,-0.02456665,0.010215759,0.009719849,0.01399231,0.0010194778,-0.033172607,0.012794495,-0.009002686,-0.02960205,-0.043670654,-0.024917603,0.02330017,-0.029922485,0.044555664,0.028137207,-0.12164307,-0.00504303,-0.039031982,0.0047073364,-0.035125732,0.0046463013,0.0042648315,0.024765015,-0.0085372925,-0.032684326,-0.00856781,-0.012580872,0.012641907,0.035461426,-0.019973755,0.04119873,-0.027740479,0.040893555,0.03164673,0.011627197,0.016220093,0.03262329,0.004558563,-0.07507324,-0.086242676,-0.015151978,-0.010116577,-0.020019531,-0.012260437,0.0129776,-0.021270752,-0.051513672,-0.009346008,-0.009521484,-0.0061569214,-0.040130615,-0.0031433105,-0.008666992,-0.00086307526,-0.013427734,-0.06088257,-0.0016422272,-0.0236969,0.0524292,0.0028324127,0.016647339,0.026931763,-0.01335144,0.06036377,0.020584106,-0.014419556,-0.026153564,-0.00020372868,-0.02458191,0.017974854,-0.01020813,0.0008955002,-0.052490234,0.037231445,0.04953003,-0.0007338524,-0.012306213,-0.016357422,-0.049041748,-0.028244019,-0.03363037,0.03970337,0.008964539,0.002117157,0.04446411,-0.039886475,-0.026931763,-0.0121154785,0.027038574,0.0065574646,0.05987549,-0.0016851425,-0.019256592,0.004623413,0.027404785,-0.05114746,0.041534424,0.037597656,0.0056037903,-0.026855469,-0.013122559,0.02192688,0.0390625,-0.0090789795,0.004837036,-0.02708435,0.023529053,-0.026519775,-0.0035533905,0.01663208,-0.0134887695,-0.006160736,-0.03643799,-0.04824829,0.027633667,-0.0005207062,-0.015731812,-0.014511108,-0.0836792,0.05114746,0.029968262,0.03479004,-0.0028247833,0.011192322,-0.024719238,0.00080013275,-0.06185913,0.052856445,0.087646484,0.010307312,-0.008140564,0.008468628,-0.008972168,-0.0073890686,-0.006954193,-0.017364502,-0.03652954,-0.022949219,0.014183044,-0.04977417,-0.0011320114,0.029174805,0.03817749,0.048858643,-0.012382507,-0.029159546,-0.0112838745,-0.011306763,-0.012779236,-0.02494812,-0.0029888153,-0.008712769,0.0016527176,0.0289917,-0.016464233,0.03048706,-0.002363205,0.017700195,-0.004699707,-0.014564514,-0.008850098,-0.013061523,0.019744873,0.017608643,-0.06036377,0.00063610077,-0.0019893646,0.06817627,-0.042755127,0.026794434,-0.018005371,0.015388489,0.03265381,-0.008796692,-0.04815674,0.00365448,0.014587402,0.0143966675,0.042541504,0.016555786,-0.031143188,-0.0033092499,0.07775879,-0.014305115,-0.015281677,-0.0067596436,-0.0039482117,0.01739502,-0.01058197,-0.053375244,-0.021697998,-0.010231018,-0.03643799,0.017700195,-0.030914307,0.017196655,-0.016571045,0.009307861,-0.0045547485,0.012886047,-0.032440186,0.03363037,-0.03314209,0.0058784485,-0.01146698,-0.023895264,-0.010910034,0.0138549805,0.0077209473,-0.014640808,0.017303467,0.032348633,-0.005962372,-0.03463745,-0.023040771,-0.016738892,-0.0009236336,0.013885498,0.01576233,0.024490356,0.04055786,-0.015457153,0.0134887695,0.007873535,0.027160645,0.03805542,-0.022750854,-0.0017290115,-0.06939697,-0.047210693,-0.02003479,-0.022567749,0.018829346,0.003622055,-0.0045776367,0.04751587,-0.01486969,-0.037597656,-0.061676025,0.030014038,-0.030380249,-0.000054955482,0.048431396,-0.01914978,-0.027526855,0.0020370483,-0.0045166016,0.0070610046,0.04849243,0.011329651,0.0259552,0.07421875,0.03567505,-0.011558533,0.022476196,0.0079422,0.02784729,0.0013971329,-0.019699097,-0.03262329,0.0072631836,0.033966064,-0.012283325,-0.031463623,-0.07147217,0.062561035,0.038085938,0.058563232,0.01322937,0.009140015,0.04586792,-0.020446777,0.008872986,-0.015808105,0.005607605,-0.004070282,-0.04638672,0.036315918,-0.013427734,0.022109985,-0.02645874,0.054382324,-0.005268097,0.028900146,-0.035491943,0.047576904,-0.012969971,0.010635376,0.014221191,0.00592041,0.04449463,0.07104492,-0.055114746,0.015655518,0.031021118,-0.039916992,0.019073486,0.061340332,-0.0077209473,-0.026412964,-0.06414795,-0.029785156,0.009017944,0.0016403198,-0.056152344,0.0012016296,0.0016460419,0.01096344,0.037597656,-0.02420044,-0.010444641,-0.013244629,-0.016143799,-0.067871094,0.017822266,-0.058532715,-0.0013084412,0.048950195,-0.020935059,-0.032806396,0.012313843,-0.026824951,-0.0101623535,0.011230469,0.027160645,-0.0021629333,-0.046417236,0.041809082,0.014816284,0.0023040771,0.022018433,0.029647827,0.01612854,0.023422241,0.054382324,0.015853882,-0.032165527,-0.050933838,0.03768921,-0.055480957,0.002008438,0.023452759,-0.025375366,0.006713867,0.003982544,-0.041625977,-0.032989502,0.014549255,-0.033843994,0.0017089844,0.011672974,-0.033599854,-0.022247314,-0.062072754,-0.007247925,-0.00023293495,0.072265625,0.024642944,-0.006587982,-0.054382324,0.016616821,0.012512207,0.015533447,0.04348755,-0.014587402,-0.017944336,-0.009269714,-0.031097412,-0.009605408,-0.029922485,0.021316528,0.00020086765,-0.030883789,0.02734375,0.011146545,-0.008987427,0.016494751,0.0075569153,0.011009216,-0.033813477,-0.007144928,-0.0128479,0.036895752,-0.011177063,-0.006401062,-0.03994751,0.034088135,0.008361816,0.028442383,-0.033111572,-0.015808105,-0.014030457,0.011764526,0.014015198,-0.019332886,-0.009849548,-0.013008118,-0.05709839,-0.062072754,0.044311523,-0.02557373,0.026245117,0.002401352,0.012016296,0.020263672,-0.01234436,0.002960205,0.03970337,-0.035736084,-0.0154800415,-0.01612854,-0.029418945,-0.03387451,0.00831604,-0.0113220215,0.021316528,-0.02142334,0.031341553,0.010566711,-0.025161743,0.025604248,0.022064209,-0.007801056,0.011940002,0.008705139,0.024490356,0.044128418,0.015838623,-0.038726807,0.030471802,-0.0000590086,0.016586304,0.0035037994,0.033050537,0.043395996,-0.019302368,-0.004032135,0.0042648315,-0.011581421,-0.011619568,0.0008611679,0.010543823,0.015151978,-0.011375427,-0.048828125,0.016342163,0.017288208,-0.03125,-0.01828003,0.031066895,0.015037537,-0.041259766,0.018722534,0.015296936,0.051330566,-0.016998291,0.009811401,0.016983032,0.034729004,0.017166138,-0.004951477,-0.014038086,0.013923645,-0.024658203,0.0019836426,-0.0141067505,0.019363403,0.040161133,0.0051116943,0.025222778,0.03668213,0.012756348,-0.012252808,-0.046722412,0.012382507,-0.01184845,-0.011550903,0.012397766,0.023345947,0.016952515,-0.011932373,0.033172607,0.022323608,-0.020629883,-0.010131836,-0.008705139,0.034118652,-0.023071289,-0.012763977,0.008972168,0.008430481,0.024642944,-0.048858643,-0.0060577393,0.022644043,0.026351929,-0.028442383,-0.05154419,-0.04034424,0.012367249,0.027145386,-0.00894165,0.021591187,0.032562256,0.0015134811,0.009475708,0.030227661,0.007511139,-0.017547607,-0.009681702,-0.02909851,-0.03567505,-0.013320923,-0.00015246868,-0.028030396,0.016952515,-0.006149292,-0.035003662,-0.00028300285,-0.014419556,-0.004261017,-0.0009765625,-0.0009698868,0.028076172,0.0047569275,0.02293396,-0.016555786,-0.036499023,-0.0015687943,0.0027828217,0.025604248,-0.046173096,0.022567749,-0.007457733,-0.02381897,-0.00030183792,0.018661499,0.01322937,0.034484863,0.022613525,0.025283813,-0.058166504,0.06185913,-0.046447754,0.013580322,0.006088257,-0.027435303,0.009887695,-0.028793335,-0.030151367,0.04852295,-0.005340576,-0.0017700195,-0.031280518,-0.035888672,-0.003314972,-0.04272461,0.022323608,0.046875,0.044952393,-0.019805908,0.002916336,0.013793945,-0.0022716522,-0.013870239,0.0004925728,0.0018959045,0.008476257,0.033721924,-0.0039138794,-0.022277832,-0.023880005,-0.01612854,-0.006134033,-0.043670654,-0.054901123,-0.00207901,0.014854431,-0.012702942,-0.015007019,-0.031173706,-0.02671814,0.0057296753,-0.038360596,-0.0010385513,-0.016189575,0.0027275085,-0.0025615692,-0.014381409,0.016571045,0.018234253,-0.038085938,0.04043579,0.013252258,0.0018873215,-0.027709961,0.021987915,0.032684326,0.0050239563,-0.0030956268,-0.01828003,-0.017730713,-0.010925293,-0.04071045,0.009025574,0.00058078766,-0.011627197,-0.008300781,-0.004234314,-0.04800415,-0.010131836,-0.01689148,-0.003189087,0.03591919,0.020874023,0.0077552795,-0.0088272095,0.014892578,-0.0061302185,-0.011947632,-0.031982422,0.017486572,0.010665894,0.0056152344,0.022354126,0.034362793,0.022094727,-0.004875183,0.014877319,0.002811432,0.026733398,-0.022766113,0.008705139,-0.023498535,0.0063209534,-0.010772705,-0.015808105,-0.02470398,-0.000036597252,0.080200195,0.018341064,-0.008323669,0.0003607273,-0.013999939,0.0059280396,0.019729614,-0.057678223,-0.0033988953,-0.042633057,0.012626648,-0.013832092,0.030258179,0.0028076172,0.008285522,-0.016067505,-0.040283203,0.004173279,0.008682251,-0.003768921,-0.07421875,-0.014266968,-0.044281006,0.0018520355,0.00027608871,-0.012969971,0.0008792877,-0.0023460388,-0.0047187805,-0.07824707,0.011764526,0.03857422,0.018661499,0.025619507,-0.0042800903,0.009216309,0.017318726,-0.041870117,-0.0058174133,0.024002075,-0.020935059,-0.02268982,-0.01474762,0.025177002,-0.01966858,-0.01309967,0.016815186,-0.010757446,0.023361206,0.003786087,-0.00042247772,-0.0184021,0.015823364,-0.036193848,0.026611328,-0.014549255,-0.0043754578,0.037200928,-0.044311523,0.012359619,0.02381897,0.026733398,0.01348114,0.028060913,0.042236328,-0.037719727,-0.009643555,0.03125,-0.0053367615,0.033416748,-0.03353882,0.046203613,0.013580322,-0.023117065,0.028060913,-0.0022258759,0.0055160522,-0.045715332,-0.021438599,0.037384033,0.011886597,0.015022278,-0.020935059,0.00009930134,0.0340271,-0.003227234,0.009223938,-0.02784729,-0.015670776,-0.02418518,-0.024642944,0.010177612,0.015335083,0.0013589859,0.016616821,0.019638062,0.024154663,0.011390686,-0.0043678284,0.020477295,0.0287323,-0.016448975,-0.006843567,0.029129028,0.015388489,-0.004032135,0.008926392,0.008323669,-0.048431396,-0.0012359619,-0.035308838,-0.034118652,-0.004169464,-0.021331787,-0.018859863,-0.014289856,0.020202637,-0.0016736984,-0.03225708,0.007987976,-0.031951904,-0.020614624,0.0005502701,-0.004211426,0.020141602,0.003107071,0.006038666,0.0076675415,0.00283432,0.05444336,0.011741638,-0.0021858215,0.026779175,0.035339355,0.012107849,-0.038269043,-0.0075912476,-0.01826477,0.0041770935,0.009307861,-0.030563354,0.013031006,0.0413208,-0.021713257,0.007873535,0.009971619,0.02180481,-0.028503418,0.0069885254,-0.012496948,0.016571045,-0.012290955,0.033081055,-0.0440979,0.017852783,0.011070251,0.010223389,-0.0032348633,-0.029678345,-0.02204895,0.012481689,0.0019140244,-0.033721924,0.04727173,-0.002861023,0.018218994,-0.0059547424,-0.016448975,0.018936157,-0.028900146,-0.012016296,0.03579712,-0.010505676,-0.01309967,-0.0015935898,-0.02571106,0.040893555,-0.03237915,-0.007965088,0.013832092,-0.018356323,-0.0040397644,-0.0074005127,-0.006000519,0.0063056946,-0.0093307495,-0.008018494,0.0070991516,0.04562378,0.03540039,0.033050537,0.052856445,-0.010650635,-0.005115509,-0.033721924,-0.022232056,0.007007599,-0.025512695,0.026504517,-0.0107803345,0.04714966,0.037628174,-0.005870819,0.02909851,0.03111267,0.02355957,-0.006389618,0.0060043335,-0.0236969,0.012649536,0.00055503845,0.040161133,-0.006752014,0.036010742,-0.024597168,0.016281128,0.022216797,0.01399231,-0.026611328,0.035339355,0.06817627,0.022201538,0.004070282,0.028900146,0.0067710876,-0.00021958351,-0.016952515,-0.025650024,0.060455322,0.011383057,0.04751587,0.049926758,0.0045700073,0.0093307495,0.021057129,-0.02394104,-0.021591187,0.076293945,0.015365601,-0.016921997,-0.013572693,-0.014930725,-0.004886627,-0.03640747,-0.034820557,0.015792847,-0.010749817,0.007850647,-0.025161743,-0.00274086,-0.017929077,0.007575989,0.018615723,0.015098572,-0.0045318604,0.026107788,0.030044556,0.0069503784,0.026885986,-0.009094238,0.029266357,-0.025848389,-0.04449463,0.013381958,0.010826111,-0.013313293,-0.010368347,0.013557434,0.011100769,0.04348755,0.040252686,-0.020767212,0.010231018,0.027999878,0.011253357,-0.004463196,0.054534912,0.042785645,0.01701355,0.030914307,0.031036377,0.043914795,-0.039794922,0.004962921,-0.0015420914,0.0023880005,-0.016998291,-0.012161255,-0.008476257,-0.015457153,0.0072288513,-0.0042304993,-0.0051231384,0.016189575,0.017425537,-0.0065956116,-0.0023040771,-0.016723633,-0.004016876,-0.0048942566,0.0026340485,0.01449585,-0.017532349,0.027450562,0.012039185,0.020355225,-0.022583008,0.009597778,-0.0049819946,-0.0028438568,-0.0056648254,0.012420654,-0.034942627,0.009628296,-0.0068588257,0.0059814453,-0.038726807,0.019622803,0.024291992,0.009307861,0.035583496,0.016983032,-0.003578186,-0.009605408,0.00017023087,0.009025574,-0.02268982,-0.016952515,-0.025482178,0.02381897,0.02658081,0.0016536713,0.021865845,-0.0038337708,-0.011100769,-0.00018393993,-0.010879517,0.0017662048,-0.018478394,-0.004634857,-0.017303467,0.005809784,0.027038574,0.024902344,0.052612305,-0.010787964,-0.013015747,0.013076782,0.029159546,0.007499695,0.012954712,-0.002281189,0.017837524,-0.0076560974,0.036865234,0.045837402,0.025375366,0.0340271,-0.027297974,-0.010360718,0.009178162,-0.00944519,0.020767212,-0.00957489,0.017974854,-0.011146545,0.040283203,-0.013847351,-0.04248047,0.014305115,-0.022216797,-0.0035858154,-0.02319336,0.01108551,0.01449585,0.02532959,0.047332764,0.026290894,-0.024765015,0.06439209,-0.0074539185,0.06341553,-0.013084412,-0.028182983,0.03741455,0.027999878,0.012825012,0.014785767,0.0049057007,-0.028442383,0.00844574,0.045410156,0.032196045,0.008041382,-0.0002603531,-0.008003235,0.033569336,-0.00198555,0.031921387,-0.003030777,0.00945282,0.011146545,-0.006324768,-0.018630981,-0.0024929047,-0.0016851425,0.004009247,0.0362854,-0.034332275,-0.0063209534,-0.02670288,-0.011558533,0.021087646,-0.021560669,0.01878357,-0.011795044,-0.033416748,0.009727478,-0.023483276,-0.025665283,-0.007873535,0.023071289,-0.032928467,-0.011726379,-0.0043144226,0.015365601,-0.021514893,0.020446777,0.029830933,-0.007850647,0.0064582825,0.038604736,-0.013870239,0.04257202,-0.011245728,0.02230835,0.040252686,0.012428284,-0.017684937,-0.01058197,0.0078125,-0.01802063,0.02217102,0.03475952,-0.028427124,0.009498596,0.004688263,-0.018218994,-0.018173218,-0.0028953552,-0.0054893494,0.0047340393,-0.0028533936,-0.008483887,-0.007827759,0.012245178,0.0128479,-0.009017944,-0.016281128,-0.018981934,0.016540527,0.018753052,0.01864624,-0.02999878,-0.01197052,0.016555786,0.015388489,-0.013671875,-0.03250122,-0.01436615,-0.03475952,0.004508972,0.019042969,0.014274597,0.014312744,-0.027618408,0.0026245117,0.010917664,0.008331299,0.014907837,0.011558533,-0.038604736,0.005027771,-0.003293991,-0.016494751,-0.014762878,-0.012634277,0.006614685,0.027297974,0.012809753,-0.01751709,0.022705078,-0.008102417,0.01449585,0.0025196075,-0.015090942,0.02078247,-0.012565613,0.00034809113,-0.003856659,0.02053833,-0.025543213,-0.017089844,-0.02470398,0.023269653,0.043518066,-0.010353088,-0.016204834,0.017974854,0.016525269,0.03262329,0.035003662,0.015945435,0.036956787,0.026748657,-0.006511688,-0.020355225,0.008216858,-0.012519836,-0.022613525,0.013076782,-0.0018434525,-0.02810669,0.025146484,0.010467529,-0.002670288,-0.03277588,-0.016021729,0.008865356,-0.012245178,0.025604248,-0.020874023,0.022201538,-0.014823914,-0.012779236,0.0021095276,-0.015853882,-0.05432129,-0.020996094,0.0033130646,-0.00001180172,-0.06506348,0.0016622543,-0.03286743,0.014526367,-0.013168335,-0.025115967,-0.00009518862,0.027923584,-0.0037593842,0.0082473755,0.0025539398,0.03186035,0.027694702,0.01600647,0.0395813,-0.015235901,-0.019042969,-0.025100708,0.0046577454,-0.009025574,0.018341064,0.008514404,0.03982544,0.01158905,-0.0016736984,0.012062073,-0.003080368,-0.01449585,-0.013870239,-0.013595581,-0.021743774,0.017547607,0.024719238,-0.018600464,-0.010421753,0.047027588,-0.0206604,-0.003004074,0.032440186,0.058532715,0.010047913,0.027816772,-0.0032520294,-0.006549835,0.0032482147,0.009864807,-0.017593384,0.018707275,0.028549194,0.005420685,0.00015580654,0.004299164,0.0012731552,-0.018798828,-0.0035495758,0.008110046,0.015655518,-0.011436462,0.032806396,0.023132324,0.016799927,-0.01751709,-0.012329102,0.021469116,0.043670654,0.029266357,0.024917603,0.014816284,0.0090789795,-0.01776123,0.010810852,-0.006099701,-0.024047852,-0.036499023,-0.021011353,-0.011489868,0.022247314,0.0018358231,0.014404297,-0.0040779114,0.021575928,-0.023849487,-0.027664185,-0.019073486,0.030410767,0.009391785,-0.017944336,-0.019302368,0.006263733,0.021759033,-0.024902344,-0.00058555603,-0.04373169,-0.022842407,0.005935669,-0.020950317,0.018585205,0.009521484,-0.0023937225,0.003856659,-0.0134887695,0.0050811768,-0.020141602,0.02079773,-0.016860962,-0.011688232,0.019989014,0.0022697449,-0.023635864,0.016113281,0.003786087,0.0061187744,0.020385742,-0.00655365,0.009963989,-0.022567749,0.045288086,-0.012504578,-0.0069236755,0.034118652,-0.0071525574,0.0011396408,-0.02923584,0.0027770996,0.005634308,-0.00024914742,0.051849365,-0.026382446,-0.04019165,-0.00041270256,-0.01374054,-0.014343262,-0.005378723,0.023849487,0.03427124,-0.010002136,0.05380249,-0.010261536,0.0046424866,0.009719849,0.016189575,-0.01499939,-0.008071899,0.044769287,0.015144348,-0.007041931,-0.0129470825,-0.009284973,-0.02973938,-0.012718201,0.019989014,-0.0090408325,-0.01676941,0.02079773,0.0079422,0.040008545,-0.00070524216,0.009719849,0.013671875,0.0035533905,0.019805908,0.004764557,0.05227661,0.0030841827,-0.037078857,-0.0021266937,0.011238098,-0.012413025,0.0053901672,-0.0054244995,-0.00806427,-0.020370483,0.010414124,-0.0057525635,0.02079773,-0.029571533,0.0022907257,-0.026031494,-0.022918701,-0.037841797,-0.013809204,-0.03475952,-0.013847351,0.03918457,0.0039863586,0.020706177,-0.0015707016,-0.008644104,0.028762817,0.040374756,-0.007472992,-0.024307251,-0.013397217,0.003271103,0.005340576,0.0077285767,0.022964478,-0.019714355,-0.014579773,-0.0016832352,-0.02142334,0.00365448,0.00831604,0.0034446716,0.006752014,-0.0055122375,-0.007270813,0.03503418,-0.0016117096,-0.005718231,0.0041236877,0.0075645447,0.052978516,0.026382446,-0.0138549805,0.017318726,-0.004558563,-0.030700684,0.0602417,0.0017223358,0.021560669,-0.020874023,0.0053138733,-0.037597656,-0.0066986084,-0.001745224,0.015167236],"createdAt":"2026-04-21T18:32:23.692Z","updatedAt":"2026-04-22T08:32:15.868Z","lastSeenAt":"2026-04-22T08:32:15.868Z","tsv":"'/api':207 '/api/v1/keys/86':68,166 '/request':19,38 '0.02':18,37,79,156 '000':83 '20':82 '402 payment api' '6':89 'access':74,181 'actual':228 'addit':217 'advertis':112 'agent':219 'ai':12,31,124 'analysi':128 'analyt':118 'ancillari':203 'api':5,24,45,73,92,116,180 'appear':185 'avail':172 'base':8,27,63,84 'base network api' 'behavior':229 'behind':164 'broad':50 'call':4,23,81 'catalog':51,189 'categori':114 'caution':225 'clarifi':231 'classif':131 'connect':213 'convers':148 'cost':76 'data':11,30,117,121 'decim':90 'document':173,218 'embed':132 'enabl':44 'endpoint':16,35,57,67,152,167,192,223 'estim':142 'exampl':200 'exchang':137 'export':122 'feed':136 'financ':13,32,133 'four':113 'function':163 'gas':141 'generat':149 'generic':177 'geocod':146 'http-post' 'individu':104 'infrastructur':144 'insight':123 'json-response' 'key':93 'label':176 'learn':126 'limit':95 'list':70,151 'low payment fee' 'lowpaymentfee.com':39 'machin':125 'main':188 'metric':119 'micropayment api' 'name':191 'network':64 'no-api-key' 'offer':10,29 'openapi':196 'page':204 'paid':103 'pay':2,21,54 'pay per call api' 'pay-per-cal':1,20 'pay-per-request':53 'payment':108 'per':3,22,55,80,158 'per-request':157 'platform':6,25,46,111 'premium':72,179 'price':135,160,205 'prompt':214 'protocol':109 'provid':48 'quot':140 'rate':94,138 'readm':206 'report':120 'request':56,101,159 'request/response':199 'requir':99 'return':208 'schema':197 'sentiment':127 'settl':58 'share':153 'specif':66,162 'subscript':97 'summar':130 'text':129 'token':139 'treat':221 'unclear':169 'unit':85 'usdc':9,28,60,87 'usdc api' 'usdc-base-settlement' 'util':15,34,145 'valid':147 'via':105 'wallet':212 'wallet-connect':211 'web3':134 'x402':43,107 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"60dc8a21-6bf9-431b-b879-9f647f1f8c4b","listingId":"5118c45a-c910-4f67-b937-2174b1b80d79","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/keys/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:23.692Z"}],"sources":[{"listingId":"5118c45a-c910-4f67-b937-2174b1b80d79","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/keys/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:23.692Z","lastSeenAt":"2026-04-22T08:32:15.868Z"}],"details":{"listingId":"5118c45a-c910-4f67-b937-2174b1b80d79","quickStartSnippet":"# The endpoint requires an x402 payment header (USDC on Base).\n# 1. POST to the endpoint without payment to receive the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/keys/86\n# 2. Parse the 402 response, construct an X-PAYMENT header with a signed USDC transfer, and retry.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/keys/86"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-request for API access without managing API keys or subscriptions","Programmatic agent access to utility or data endpoints settled on-chain","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers or agents wanting zero-commitment, per-call API access","x402 protocol experimentation and integration testing","Scenarios where traditional API key management is undesirable"],"notFor":["High-volume use cases where per-call pricing becomes expensive compared to subscription plans","Users who need detailed API documentation, schemas, or SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:05.395Z"},"updatedAt":"2026-04-22T08:32:15.868Z"}}