{"id":"1d0e86a2-a371-4934-81f8-d7c8d3e0f6bd","shortId":"7pSHKB","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint at `/api/v1/payments/373` is labeled \"Premium API Access\" and requires a maximum of 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an x402 payment header to each request.\n\nThe broader platform lists endpoints across four categories: 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 are priced at $0.02 per request.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/payments/373` endpoint actually returns. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what data or functionality it provides beyond the generic \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","low payment fee API"],"warnings":["No documentation available — all doc/pricing/README pages render only 'Connect wallet'","No OpenAPI or JSON schema describing request parameters or response format","The specific purpose of /api/v1/payments/373 ('Premium API Access') is undefined — unclear what data or service it provides","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/373","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/payments/373","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 402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does beyond the generic 'Premium API Access' label. Pricing is clear ($0.02 USDC on Base) but functionality is opaque.","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":"2026-04-19T07:23:09.813Z","embedding":[-0.031707764,-0.031707764,0.03842163,0.014381409,0.014373779,-0.026565552,-0.017684937,0.024673462,0.07714844,-0.06112671,0.02218628,-0.051330566,-0.040985107,-0.028945923,-0.032073975,0.0030345917,0.0040245056,0.0009717941,-0.031921387,0.028396606,0.023132324,-0.01348114,-0.029205322,0.027297974,0.0031032562,-0.0127334595,-0.010734558,-0.001203537,-0.01977539,-0.035705566,0.048217773,-0.023635864,-0.004486084,0.0019950867,-0.013427734,-0.017089844,-0.0027618408,0.025024414,0.027435303,0.0017557144,-0.0062179565,-0.05102539,0.00274086,-0.014930725,-0.05987549,-0.005519867,0.002313614,-0.024230957,-0.00015211105,0.00017380714,-0.031021118,-0.018035889,-0.016983032,0.009925842,0.0087509155,0.006164551,-0.006149292,-0.017700195,0.010307312,0.016052246,-0.01184845,-0.056121826,-0.021759033,-0.01272583,0.008270264,0.050750732,-0.010787964,0.040985107,0.009536743,0.060058594,0.042541504,0.044067383,0.027023315,0.0096588135,0.0014162064,-0.0039405823,0.00013446808,0.056274414,-0.011161804,-0.02180481,-0.009521484,-0.005302429,-0.05618286,0.0060539246,-0.02142334,-0.04324341,-0.022567749,0.023391724,-0.021102905,0.031097412,-0.07940674,-0.0050697327,-0.013366699,-0.0067863464,0.0025196075,-0.0054092407,-0.011802673,0.02772522,-0.010681152,0.00844574,-0.010726929,-0.044067383,0.016937256,0.007888794,0.03744507,0.041534424,0.021316528,0.022644043,0.01361084,-0.002872467,-0.033599854,0.012367249,-0.008117676,-0.009773254,0.01586914,0.005290985,-0.016647339,0.015090942,-0.031036377,0.020965576,-0.043945312,0.044525146,0.0038108826,0.0062065125,0.0050354004,-0.044799805,-0.008888245,0.025939941,-0.025482178,-0.0016889572,0.015365601,0.008506775,0.026535034,-0.02520752,-0.032989502,0.021514893,-0.018661499,-0.011405945,-0.046295166,-0.030807495,0.044128418,-0.026687622,0.017120361,0.03010559,-0.09588623,-0.0057373047,-0.044952393,0.017349243,-0.030380249,-0.0069618225,-0.00030136108,0.034698486,-0.011390686,-0.011062622,-0.031951904,-0.028060913,0.002090454,0.039276123,-0.016174316,0.052368164,-0.022003174,0.02494812,0.023666382,0.006252289,0.013916016,0.020217896,-0.005706787,-0.08642578,-0.07952881,-0.013969421,-0.0031967163,-0.020202637,-0.028060913,0.0062332153,-0.0077934265,-0.06695557,-0.014060974,-0.017349243,-0.00018548965,-0.036743164,-0.0029239655,-0.03302002,0.0209198,-0.00003248453,-0.060150146,-0.030548096,-0.026306152,0.052520752,0.02281189,0.028457642,0.02319336,-0.01184845,0.06359863,0.022705078,-0.021438599,-0.010414124,0.01864624,-0.026626587,0.015113831,-0.014694214,0.014854431,-0.032196045,0.03829956,0.0715332,0.009994507,-0.020584106,-0.014801025,-0.06060791,-0.043060303,-0.032989502,0.019958496,0.00034689903,-0.010223389,0.033050537,-0.031982422,-0.033569336,0.0027999878,0.013114929,0.018218994,0.0690918,0.018112183,-0.011062622,0.027694702,0.019058228,-0.06036377,0.040618896,0.035949707,0.008460999,-0.024810791,-0.031143188,0.03161621,0.040618896,-0.025848389,0.02671814,-0.014930725,0.026123047,-0.010910034,-0.00207901,0.014015198,-0.018585205,-0.027572632,-0.026229858,-0.03488159,0.034698486,0.009292603,-0.03387451,-0.035217285,-0.07574463,0.048950195,0.040405273,0.046691895,0.00055360794,0.013442993,-0.018127441,-0.008644104,-0.07067871,0.054779053,0.07702637,0.0010700226,-0.012008667,0.024169922,-0.010932922,-0.028274536,0.007537842,-0.018035889,-0.035247803,-0.026489258,0.010467529,-0.046783447,0.0022773743,0.025665283,0.0140686035,0.05267334,-0.004875183,-0.05227661,-0.014762878,-0.005214691,-0.0032978058,-0.03265381,-0.002363205,-0.012619019,0.015808105,0.022399902,0.0014276505,0.0154800415,-0.0035572052,-0.006164551,0.0005040169,-0.0014696121,-0.0003771782,-0.029373169,0.01828003,0.0032730103,-0.058166504,0.0068588257,-0.0058250427,0.08331299,-0.05227661,0.037872314,-0.013534546,0.010513306,0.048614502,-0.009048462,-0.046936035,0.0034427643,0.030303955,0.013702393,0.041900635,0.009300232,-0.032440186,-0.022338867,0.06524658,-0.0003414154,0.00070142746,0.004924774,0.019561768,0.036193848,0.0020866394,-0.059692383,-0.04046631,-0.0012845993,-0.046966553,0.025009155,-0.026412964,0.02659607,-0.012779236,0.0005950928,-0.028305054,0.0009098053,-0.038391113,0.012573242,-0.009422302,0.0075531006,-0.018035889,-0.02027893,0.0262146,0.022033691,-0.008132935,0.011169434,0.040924072,0.03189087,-0.007675171,-0.0317688,-0.029205322,-0.0043182373,-0.008110046,0.017059326,0.014801025,0.026626587,0.05291748,-0.04336548,0.00060606,0.028686523,0.01574707,0.037597656,-0.0025615692,0.00806427,-0.0680542,-0.05239868,-0.033691406,-0.04360962,0.024108887,0.014251709,-0.012130737,0.055664062,0.010261536,-0.022567749,-0.039154053,0.02748108,-0.046783447,-0.008621216,0.041290283,-0.020996094,-0.021087646,0.0043945312,-0.0044174194,0.012512207,0.03768921,0.01977539,0.039154053,0.07232666,0.044281006,0.0069503784,0.021209717,0.004257202,0.027359009,0.007888794,-0.022064209,-0.035095215,-0.014465332,0.032806396,-0.027328491,-0.01763916,-0.06573486,0.05392456,0.04486084,0.08319092,0.021957397,0.0013771057,0.03111267,-0.022979736,0.0115737915,-0.025390625,-0.018585205,-0.026657104,-0.050445557,0.034820557,-0.01360321,-0.0021896362,-0.019134521,0.04043579,-0.004550934,0.019454956,-0.028015137,0.049316406,-0.017562866,-0.008995056,0.013313293,0.014160156,0.056427002,0.05810547,-0.045928955,0.02722168,0.023788452,-0.023757935,0.0033931732,0.03201294,-0.014694214,-0.004638672,-0.05114746,-0.0262146,-0.012504578,-0.00894165,-0.05203247,0.013168335,0.0065612793,0.020843506,0.021484375,-0.007980347,-0.012611389,0.00052309036,-0.016708374,-0.05404663,-0.003036499,-0.03225708,-0.0046958923,0.041168213,-0.017593384,-0.0078048706,0.0006155968,-0.0065307617,0.00920105,0.017578125,0.01991272,0.0008788109,-0.048187256,0.028457642,0.005947113,0.010482788,0.010902405,0.027389526,0.019210815,0.027038574,0.058410645,0.01576233,-0.018585205,-0.068481445,0.01927185,-0.046905518,-0.005264282,0.017654419,-0.021209717,0.0033893585,-0.018661499,-0.028656006,-0.025131226,0.0019273758,-0.035888672,0.01259613,0.022094727,-0.014579773,-0.027938843,-0.053863525,-0.029388428,-0.004234314,0.06555176,0.016418457,0.008842468,-0.06665039,-0.008270264,0.019546509,0.010063171,0.034606934,-0.014595032,-0.010597229,-0.022018433,-0.04046631,-0.0064964294,-0.02659607,0.019607544,-0.012123108,-0.006362915,0.017166138,0.015327454,0.029678345,0.0020046234,0.0158844,0.022094727,-0.022735596,-0.0011224747,-0.0056991577,0.04244995,0.015777588,-0.008056641,-0.050933838,0.045654297,0.0121536255,0.031707764,-0.0491333,-0.0015525818,-0.008224487,0.0070495605,0.015914917,-0.008010864,-0.0051727295,-0.008331299,-0.045013428,-0.064453125,0.044891357,-0.026245117,0.019577026,0.022415161,0.0021533966,0.02519226,-0.0038604736,-0.003709793,0.009155273,-0.024093628,-0.00970459,-0.02508545,-0.029418945,-0.012329102,-0.012290955,-0.027435303,0.028686523,-0.023223877,0.020217896,0.007507324,-0.018951416,0.027389526,-0.005302429,-0.0054512024,0.017715454,-0.0016317368,0.024139404,0.035064697,0.008575439,-0.044799805,0.026062012,0.006576538,0.013587952,-0.0030326843,0.040893555,0.030670166,-0.0077590942,-0.018127441,-0.014228821,-0.016708374,-0.030258179,0.0060539246,0.011604309,0.013771057,-0.004890442,-0.041015625,0.007171631,0.0070991516,-0.034973145,-0.02470398,0.009567261,0.015022278,-0.031021118,0.012924194,0.029708862,0.05340576,-0.022994995,-0.001420021,0.0013170242,0.024932861,0.03640747,0.012214661,-0.0038547516,0.018341064,-0.011550903,0.014289856,-0.0069389343,-0.01461792,0.019302368,0.001824379,0.022659302,0.025527954,0.0036315918,-0.024047852,-0.03540039,0.0021438599,-0.010253906,-0.032073975,0.024780273,0.02279663,0.025024414,-0.024551392,0.018035889,0.018844604,-0.015151978,-0.015655518,-0.014198303,0.034606934,-0.020874023,-0.014526367,0.019958496,0.018554688,0.030044556,-0.05279541,-0.0053482056,0.0019168854,0.012130737,-0.022781372,-0.043762207,-0.045135498,0.0012521744,0.035308838,0.011238098,0.02154541,0.035583496,0.010765076,0.011940002,0.029708862,-0.0024757385,-0.017364502,-0.018356323,-0.050872803,-0.0206604,-0.013420105,-0.00097322464,-0.031066895,0.014266968,0.00064468384,-0.03366089,0.010726929,-0.01374054,-0.004081726,-0.0127334595,0.00623703,0.0390625,0.00737381,0.017608643,-0.016525269,-0.040100098,0.0017929077,0.0102005005,0.02015686,-0.049865723,0.019241333,-0.008758545,-0.005393982,0.004611969,0.009613037,0.020004272,0.02470398,0.010414124,0.03414917,-0.031799316,0.05154419,-0.041534424,0.012039185,0.011009216,-0.041168213,-0.010559082,-0.026657104,-0.014266968,0.03668213,-0.027648926,-0.008049011,-0.031341553,-0.041503906,-0.023223877,-0.050598145,0.010383606,0.04547119,0.036315918,-0.028640747,0.0014343262,-0.0036125183,0.005302429,-0.012763977,0.0052948,-0.018127441,0.02407837,0.025039673,0.010437012,-0.038360596,-0.02999878,-0.026184082,-0.008018494,-0.044067383,-0.046295166,-0.007209778,-0.0012054443,-0.0028095245,-0.016357422,-0.026351929,-0.033843994,-0.000050127506,-0.041870117,0.0057640076,0.0037269592,0.022216797,0.0041999817,-0.030044556,0.0014390945,0.020568848,-0.016067505,0.03390503,0.006351471,-0.010223389,-0.044067383,0.01335144,0.01247406,0.0143966675,-0.0072784424,-0.0206604,-0.0126953125,-0.018218994,-0.057434082,-0.0036945343,-0.0066337585,-0.00970459,-0.015037537,-0.0011110306,-0.049926758,-0.0013942719,-0.013793945,0.01058197,0.022369385,0.011070251,0.011604309,-0.0010299683,0.014945984,0.0008506775,-0.00920105,-0.029708862,0.018966675,0.010688782,0.007911682,0.031555176,0.045532227,0.0032348633,-0.022827148,0.011627197,0.004425049,0.020187378,-0.011146545,0.007850647,-0.020935059,0.00856781,-0.0019760132,-0.01651001,-0.042297363,0.00029969215,0.09448242,0.0007109642,-0.015945435,-0.012702942,-0.019119263,0.022598267,0.028121948,-0.04046631,-0.0061416626,-0.023239136,0.01576233,-0.028060913,0.008377075,0.003364563,0.023071289,-0.015930176,-0.054656982,-0.018753052,-0.009155273,-0.01625061,-0.061035156,-0.028762817,-0.062683105,0.002149582,-0.0076560974,-0.019058228,0.0019254684,0.0054969788,-0.017730713,-0.0736084,-0.003917694,0.046722412,0.005592346,0.027328491,-0.008041382,0.025527954,0.016677856,-0.03491211,0.0007648468,0.023727417,-0.03262329,-0.011924744,-0.021942139,0.014541626,-0.013130188,-0.020401001,0.003686905,0.010787964,0.017150879,-0.009849548,0.007255554,0.002998352,0.021575928,-0.021957397,0.016540527,-0.014839172,-0.014007568,0.03378296,-0.045318604,0.02482605,0.010749817,-0.0184021,0.0019664764,0.025299072,0.04244995,-0.02986145,-0.017318726,0.015731812,0.018661499,0.03390503,-0.023544312,0.041381836,0.015022278,-0.01348114,0.017044067,-0.00793457,-0.018371582,-0.03390503,-0.026031494,0.022659302,0.00033807755,0.007583618,-0.017700195,0.0019168854,0.014060974,0.001206398,0.0121154785,-0.01272583,-0.01966858,-0.024475098,-0.0047035217,-0.0030345917,0.00063467026,-0.00065660477,0.027877808,0.023406982,0.036865234,0.012161255,-0.014030457,0.0044174194,0.03186035,-0.007835388,0.0037326813,0.024291992,0.0063972473,0.0211792,0.017669678,0.0132751465,-0.04751587,-0.017318726,-0.027770996,-0.023544312,-0.0072517395,-0.0061187744,-0.016937256,-0.0067100525,-0.00080919266,-0.00920105,-0.029922485,0.0016403198,-0.023529053,-0.027511597,-0.007511139,-0.013938904,0.02722168,0.0016803741,0.00806427,0.012687683,-0.007785797,0.04019165,-0.0036315918,-0.021865845,0.030181885,0.029449463,0.015312195,-0.028060913,-0.0045814514,-0.0099487305,-0.0025081635,0.0021743774,-0.037017822,0.012290955,0.041503906,-0.021133423,0.0067214966,0.012237549,0.025665283,-0.0052375793,0.0033473969,-0.0112838745,0.017456055,-0.009841919,0.034606934,-0.045562744,0.026473999,0.013694763,0.0063323975,-0.008232117,-0.0058784485,-0.025665283,0.015556335,0.0102005005,-0.007610321,0.053710938,0.0019893646,0.025756836,-0.020492554,-0.025512695,0.01474762,-0.027389526,-0.023117065,0.024398804,-0.0031909943,-0.00096178055,0.013404846,-0.02784729,0.037078857,-0.033325195,0.014877319,0.007965088,0.0055770874,-0.003162384,-0.023773193,-0.004055023,-0.015464783,-0.014465332,0.0041160583,-0.0011796951,0.049804688,0.016418457,0.03262329,0.05795288,0.020080566,0.0020389557,-0.037963867,-0.034210205,0.0054359436,-0.018630981,0.02017212,-0.015129089,0.060760498,0.037841797,0.0059776306,0.045196533,0.029083252,0.034088135,0.009513855,0.004085541,-0.018936157,0.014923096,-0.005794525,0.026367188,-0.00016653538,0.03111267,-0.035705566,0.03366089,0.01499939,0.03074646,-0.028747559,0.035888672,0.06604004,0.017028809,-0.016860962,0.04537964,-0.0107040405,-0.012878418,-0.012741089,-0.016403198,0.06072998,0.012825012,0.049346924,0.050628662,0.013824463,0.0047340393,0.013557434,-0.024398804,-0.02520752,0.06112671,0.023757935,-0.021942139,-0.016662598,0.0036735535,0.007232666,-0.03955078,-0.03010559,0.030883789,-0.01146698,0.010597229,-0.012786865,-0.002872467,-0.015205383,0.008087158,0.022842407,0.013389587,-0.016220093,0.027511597,0.036987305,-0.006084442,0.029083252,-0.0027866364,0.028320312,-0.021530151,-0.029052734,0.018371582,0.026504517,-0.008850098,-0.0098724365,0.020050049,0.0039787292,0.03262329,0.04699707,-0.019515991,0.009628296,0.032562256,0.012252808,-0.009552002,0.05581665,0.043762207,0.0124435425,0.03970337,0.029083252,0.033447266,-0.040649414,0.024780273,0.0006842613,-0.0025100708,-0.013679504,-0.0077667236,0.0028514862,-0.01474762,0.0146484375,-0.002571106,-0.014503479,0.023620605,0.026779175,-0.006996155,-0.009552002,-0.013031006,0.015464783,-0.025024414,-0.0030288696,0.010299683,-0.014228821,0.042053223,0.0062332153,0.03439331,-0.024307251,0.01902771,0.0005493164,-0.015975952,-0.0014848709,0.02758789,-0.027359009,0.008346558,-0.010231018,0.0099487305,-0.052947998,0.012229919,0.030670166,-0.01763916,0.02861023,0.011306763,-0.007133484,-0.006931305,0.026641846,0.011482239,-0.0028152466,-0.008995056,-0.020614624,0.032226562,0.050048828,-0.006767273,0.0017051697,-0.026367188,-0.007484436,0.0061187744,-0.0049362183,-0.0059661865,-0.010009766,-0.0206604,-0.022262573,0.017730713,0.03427124,0.01687622,0.057495117,-0.024841309,-0.010131836,0.0140686035,0.03475952,0.0027999878,0.005504608,0.0007362366,0.020446777,-0.019058228,0.05114746,0.028823853,0.014251709,0.03933716,-0.002199173,-0.019546509,0.0075912476,-0.0044136047,0.02268982,-0.008605957,0.007858276,-0.0032749176,0.028869629,-0.016189575,-0.041534424,0.008079529,-0.016281128,-0.028427124,-0.02015686,0.017532349,-0.0026779175,0.03161621,0.0418396,0.02619934,-0.024551392,0.059570312,-0.013145447,0.046691895,0.002609253,-0.011657715,0.053863525,0.015975952,0.03741455,0.024246216,0.019058228,-0.03668213,0.025146484,0.035888672,0.024795532,0.014511108,0.009567261,-0.013519287,0.040985107,0.004875183,0.03152466,-0.0099487305,-0.0012998581,0.016113281,-0.0003285408,-0.015274048,-0.008590698,-0.0048713684,0.01374054,0.04437256,-0.03277588,-0.013427734,-0.029388428,-0.004108429,0.024276733,-0.021377563,0.005706787,0.0030574799,-0.0236969,0.014137268,-0.025314331,-0.028121948,0.0082473755,0.025405884,-0.050231934,-0.012008667,-0.0014371872,0.018936157,-0.0178833,0.028930664,0.020309448,-0.002407074,0.013534546,0.048065186,-0.009284973,0.030075073,-0.01247406,0.025482178,0.027114868,0.0056037903,-0.022567749,-0.0011548996,0.01448822,-0.012588501,0.016296387,0.039520264,-0.010215759,0.005039215,-0.0016202927,-0.0064964294,0.0021381378,0.010986328,-0.004371643,0.012756348,-0.013137817,-0.008682251,-0.0063591003,0.005722046,-0.0030212402,0.007827759,-0.005393982,-0.013916016,0.007888794,0.032958984,0.02142334,-0.033081055,-0.0044822693,0.0030212402,0.006011963,-0.01928711,-0.0073890686,-0.001958847,-0.03656006,0.019012451,0.013092041,0.015823364,0.014175415,-0.025482178,0.0023880005,0.02305603,0.014854431,0.015914917,0.0007081032,-0.0031661987,0.015510559,-0.011253357,-0.0010375977,-0.006942749,-0.007701874,0.01083374,0.020492554,0.0043945312,-0.03286743,0.01828003,0.00071144104,0.017364502,-0.0017557144,-0.010818481,0.01486969,-0.0056419373,-0.0039634705,0.0004734993,0.009109497,-0.009002686,-0.015945435,-0.011604309,0.042755127,0.059936523,-0.011451721,-0.005924225,0.025268555,0.01777649,0.016159058,0.042541504,0.0045547485,0.03692627,0.025131226,-0.017410278,-0.022827148,0.027877808,-0.011764526,-0.027435303,0.01612854,-0.017074585,-0.012878418,0.019058228,0.010154724,-0.0043525696,-0.02432251,-0.007648468,-0.013969421,-0.013938904,0.020492554,-0.015548706,0.0077400208,-0.023284912,-0.009742737,0.010688782,-0.024887085,-0.051879883,-0.025344849,-0.0044403076,-0.004737854,-0.0501709,0.0024356842,-0.027069092,0.011230469,-0.029678345,-0.0019006729,-0.011177063,0.015975952,-0.015899658,-0.0090408325,0.0071983337,0.021194458,0.025543213,0.0066719055,0.01789856,-0.034088135,-0.022842407,-0.026748657,0.009422302,-0.009208679,0.026443481,0.0027332306,0.038879395,0.026931763,-0.014778137,-0.0048713684,-0.011802673,-0.008071899,-0.01826477,-0.016067505,-0.025558472,0.024505615,0.009941101,-0.009788513,-0.006931305,0.046081543,-0.030212402,-0.021652222,0.030700684,0.04135132,0.01374054,0.02394104,-0.01979065,-0.006916046,-0.016693115,-0.0005784035,-0.021224976,0.005191803,0.011360168,0.0012083054,-0.0059394836,0.008430481,0.021484375,-0.008735657,-0.011451721,0.02986145,0.010299683,-0.0063972473,0.04034424,0.01083374,0.0031585693,-0.011199951,-0.008659363,0.018569946,0.050811768,0.008018494,0.0074386597,-0.0068969727,0.001742363,-0.015426636,0.008811951,0.01890564,-0.01991272,-0.045898438,-0.0178833,-0.030212402,0.019485474,-0.0027999878,0.011940002,-0.010948181,0.020080566,-0.016403198,-0.03012085,-0.02217102,0.024932861,0.01637268,-0.011962891,-0.011329651,0.0132369995,0.0029277802,-0.033233643,0.0031871796,-0.048095703,-0.036254883,-0.006099701,-0.021835327,0.024093628,0.011421204,-0.0037651062,-0.00039434433,-0.005252838,-0.00006175041,-0.0026950836,0.025817871,-0.008087158,-0.002729416,0.037261963,0.013549805,-0.013969421,0.017852783,-0.009735107,0.0022640228,0.012069702,-0.013458252,0.014015198,-0.018096924,0.026504517,-0.011985779,-0.0032672882,0.030700684,-0.00642395,0.013389587,-0.0368042,0.0088272095,-0.0005578995,-0.008651733,0.037719727,-0.03363037,-0.022415161,0.011627197,-0.02243042,-0.026382446,-0.00058984756,0.015609741,0.03427124,-0.013015747,0.04550171,-0.013916016,-0.007621765,0.013282776,0.011154175,-0.015808105,0.0049324036,0.030700684,0.0039787292,-0.010513306,0.0007252693,-0.014152527,-0.03491211,-0.009925842,0.016311646,-0.007835388,-0.008651733,0.03515625,0.01348114,0.043792725,-0.0035572052,0.014465332,0.010643005,0.0072631836,0.02331543,0.0026569366,0.060424805,-0.0037193298,-0.038879395,0.00881958,0.0034008026,-0.014694214,0.000808239,-0.008331299,-0.0016393661,-0.037719727,0.013343811,-0.0030078888,0.025665283,-0.021591187,0.010421753,-0.020935059,-0.006286621,-0.039520264,-0.012893677,-0.03314209,0.0107040405,0.029525757,0.0023498535,0.024917603,0.0043945312,-0.021728516,0.019760132,0.048980713,-0.004802704,-0.029968262,-0.01159668,0.0057678223,0.0003619194,0.0115356445,0.0037002563,-0.022964478,-0.014511108,0.009124756,-0.024032593,0.0101623535,-0.004211426,0.019760132,0.0042648315,-0.003227234,-0.00818634,0.024749756,-0.008636475,-0.0041007996,0.013061523,0.01260376,0.041625977,0.024108887,-0.014877319,0.02319336,0.020385742,-0.04031372,0.05493164,-0.0046577454,0.024215698,-0.021148682,0.0016183853,-0.03515625,-0.019882202,-0.020050049,0.0033245087],"createdAt":"2026-04-18T18:50:35.587Z","updatedAt":"2026-04-23T21:32:17.520Z","lastSeenAt":"2026-04-23T21:32:17.520Z","tsv":"'/api/v1/payments/373':57,186 '/request':13,28 '0.02':12,27,75,147 '000':69 '20':68 '402':197 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,89,216 'across':105 'actual':188 'advertis':80 'ai':115 'analysi':119 'analyt':109 'api':5,20,38,61,82,156,215 'attach':92 'base':8,23,51,70 'beyond':211 'broader':101 'call':4,19,77 'caller':90 'categori':107 'challeng':198 'classif':122 'connect':165 'content':171 'convers':139 'data':108,112,206 'descript':182 'doc':155 'document':150,201 'embed':123 'endpoint':55,104,143,187,191 'estim':133 'exampl':179 'exchang':128 'export':113 'extrem':152 'feed':127 'financ':124 'four':106 'function':208 'gas':132 'generat':140 'generic':213 'geocod':137 'header':96 'i.e':74 'infrastructur':135 'insight':114 'instant':88 'json-response' 'key':83 'label':59,217 'learn':117 'limit':86 'list':103,142 'live':193 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':116 'maximum':66 'metric':110 'network':9,24,52 'no-api-key' 'openapi':175 'page':160 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,95 'per':3,18,36,76,148 'platform':6,21,39,79,102 'premium':60,214 'price':126,145,157 'prompt':167 'protocol':44 'provid':210 'quot':131 'rate':85,129 'readm':159 'render':162 'report':111 'request':37,99,149 'request/response':178 'requir':64 'return':189,194 'schema':176 'sentiment':118 'simpli':91 'spars':153 'specif':54 'summar':121 'text':120 'token':130 'unclear':204 'unit':71 'usdc':15,30,47,73 'usdc-base-network' 'use':41 'util':136 'valid':138,196 'via':10,25 'wallet':166 'web3':125 'without':200 'x402':11,26,43,94 'x402 API' 'x402-payment'","prices":[{"id":"b61f7691-172f-4ee8-bced-ec2525ff9ba7","listingId":"1d0e86a2-a371-4934-81f8-d7c8d3e0f6bd","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/payments/373","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:35.587Z"}],"sources":[{"listingId":"1d0e86a2-a371-4934-81f8-d7c8d3e0f6bd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/373","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:35.587Z","lastSeenAt":"2026-04-23T21:32:17.520Z"}],"details":{"listingId":"1d0e86a2-a371-4934-81f8-d7c8d3e0f6bd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/373 \\\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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/373"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Platform advertises no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/payments/373"}],"useCases":["Accessing pay-per-request API endpoints without subscription or API key management","Making micropayment-gated API calls settled in USDC on Base","Programmatic agent access to various utility and data endpoints via x402 protocol"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-friction API access without signup"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring high-throughput with predictable flat-rate pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:06.666Z"},"updatedAt":"2026-04-23T21:32:17.520Z"}}