{"id":"114d926e-2b42-49ec-9ec0-4d3fb927671f","shortId":"554W87","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API marketplace that exposes a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request using USDC on the Base network, settled via the x402 protocol — no API keys, no rate limits, and no upfront commitments required.\n\nThe specific endpoint at `/api/v1/trades/149` is labeled \"Premium API Access\" and accepts POST requests. Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point.\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 spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but without documentation it is unclear what data `/api/v1/trades/149` specifically returns or what POST body it expects.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","geocoding","utility-apis"],"categories":["data","llm","finance","infrastructure"],"synonyms":["low payment fee","x402 API","pay-per-call API","USDC API","Base network API","micropayment API","trades API"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition found for any endpoint","The specific function of /api/v1/trades/149 ('Premium API Access') is undocumented — unclear what data it returns or what request body it expects","The platform lists many endpoint categories but none have documented request/response formats"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/149","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/trades/149","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The specific purpose of /api/v1/trades/149 is undocumented. This is 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":"2026-04-19T11:34:04.230Z","embedding":[-0.03564453,-0.023712158,0.031188965,0.010177612,0.024261475,-0.016845703,-0.027038574,0.03466797,0.07366943,-0.058013916,0.031707764,-0.045166016,-0.031951904,-0.04147339,-0.024215698,0.011192322,-0.013183594,0.0058174133,-0.060577393,0.055480957,0.035949707,-0.021087646,-0.022567749,0.027420044,-0.019378662,-0.011009216,0.0065689087,-0.007583618,-0.03643799,-0.031311035,0.03186035,-0.033569336,-0.007484436,0.0047073364,0.001115799,-0.003856659,0.008041382,0.045440674,0.034057617,-0.0077705383,0.01739502,-0.06335449,0.010040283,-0.0053138733,-0.051757812,-0.017318726,0.010826111,-0.02268982,-0.008926392,-0.00064373016,-0.031799316,0.0018997192,-0.015808105,0.012962341,0.013969421,0.0011968613,-0.017471313,-0.0032367706,0.017242432,0.01991272,-0.005531311,-0.05795288,-0.0019683838,0.006881714,0.00074338913,0.05026245,-0.0044174194,0.040893555,-0.003293991,0.06173706,0.02784729,0.030639648,0.04046631,0.014328003,0.009140015,-0.00856781,-0.030288696,0.06185913,-0.007713318,-0.016204834,-0.023712158,-0.0055770874,-0.059295654,-0.024093628,-0.021820068,-0.072265625,-0.021591187,0.016677856,-0.03591919,0.024032593,-0.074157715,-0.014633179,0.0055503845,0.009880066,-0.0005283356,-0.008117676,-0.014793396,0.012840271,-0.005592346,0.032470703,0.0010251999,-0.030258179,0.009498596,0.029083252,0.04498291,0.041503906,0.024017334,0.01448822,-0.003982544,-0.019943237,-0.037139893,0.0046081543,-0.002565384,-0.014579773,0.010124207,0.0060272217,-0.025405884,0.021438599,-0.020904541,0.023529053,-0.044830322,0.043945312,0.023010254,-0.01309967,-0.013633728,-0.050445557,-0.01184082,-0.00894165,-0.032073975,-0.009757996,0.01838684,0.0042419434,0.03189087,-0.010787964,-0.034942627,0.0010271072,-0.02468872,-0.017166138,-0.05822754,-0.019058228,0.042053223,-0.024337769,0.009422302,0.03225708,-0.10614014,-0.012832642,-0.045166016,0.012413025,-0.022415161,-0.007270813,0.016525269,0.022567749,-0.038726807,-0.036102295,-0.006881714,-0.029785156,-0.011985779,0.03036499,-0.005405426,0.024765015,-0.012016296,0.031036377,-0.0014734268,0.010650635,0.024032593,0.0345459,0.01638794,-0.09460449,-0.085876465,-0.039642334,0.021194458,-0.014785767,-0.03427124,-0.0059165955,0.0069847107,-0.08856201,-0.045043945,-0.00995636,-0.0050315857,-0.043884277,-0.020111084,-0.039093018,0.014312744,-0.009414673,-0.044158936,-0.029296875,-0.03387451,0.05731201,0.019897461,0.0038757324,0.01902771,0.010429382,0.059661865,0.024246216,0.0034713745,-0.03289795,0.015037537,-0.012672424,0.053863525,0.018066406,0.03756714,-0.021514893,0.039733887,0.057678223,-0.009979248,-0.028121948,0.006515503,-0.045898438,-0.05316162,-0.036376953,0.018173218,0.00856781,-0.008712769,0.016464233,-0.025817871,-0.032562256,0.0034484863,0.013328552,0.015159607,0.069885254,-0.00052690506,0.017791748,0.022583008,0.009498596,-0.02520752,0.056732178,0.03643799,0.0044822693,-0.017074585,-0.039764404,0.027175903,0.038513184,-0.033935547,0.0019483566,-0.0028095245,0.011756897,0.012924194,0.00048828125,0.01436615,-0.004283905,-0.02128601,-0.03933716,0.009902954,0.012832642,-0.00037837029,-0.027740479,-0.042175293,-0.07574463,0.025253296,0.05505371,0.042236328,-0.006401062,-0.0124435425,-0.034820557,-0.00806427,-0.07788086,0.04763794,0.05871582,-0.012557983,-0.018539429,0.03366089,-0.00178051,-0.024520874,-0.014877319,-0.012519836,-0.013084412,-0.015625,0.0048599243,-0.04055786,-0.018814087,0.018249512,0.01991272,0.039520264,-0.018875122,-0.04937744,-0.038970947,0.0036754608,0.018951416,-0.025558472,-0.006465912,0.013023376,0.029129028,0.033081055,0.0005636215,0.01386261,0.0061149597,0.01638794,-0.003955841,0.010726929,-0.027938843,-0.031402588,0.01687622,0.019882202,-0.073791504,0.0075187683,-0.011177063,0.05960083,-0.05206299,0.046325684,-0.031463623,0.033050537,0.037994385,-0.0055770874,-0.047332764,-0.010215759,0.017959595,0.035247803,0.035064697,0.014953613,-0.021743774,-0.013427734,0.06713867,-0.01525116,-0.0076522827,0.0146102905,0.022521973,0.041778564,-0.0027885437,-0.054656982,-0.030578613,0.003042221,-0.011665344,0.04269409,-0.016464233,0.024520874,-0.022079468,0.002161026,-0.024719238,0.006088257,-0.048675537,0.0018863678,-0.024215698,-0.0047073364,-0.011909485,-0.024032593,0.013473511,0.0033569336,-0.012275696,0.010292053,0.039886475,0.018371582,-0.01701355,-0.024230957,-0.019073486,-0.017150879,-0.018173218,0.016098022,0.032470703,0.01197052,0.03265381,-0.02305603,-0.0047416687,0.021331787,0.00983429,0.041992188,-0.011367798,-0.0009994507,-0.050567627,-0.04260254,-0.028152466,-0.032806396,0.023254395,0.013870239,0.002714157,0.053710938,0.0017576218,-0.008888245,-0.03366089,0.012649536,-0.04269409,-0.0048446655,0.051330566,-0.02798462,-0.055236816,0.00356102,-0.0025634766,0.002084732,0.033416748,0.020751953,0.014289856,0.07696533,0.020339966,0.018173218,0.023712158,-0.0015707016,0.022918701,0.005722046,-0.021209717,-0.03164673,-0.019210815,0.016860962,-0.027877808,-0.030181885,-0.060668945,0.05822754,0.03353882,0.08355713,0.015007019,0.0102005005,0.041778564,-0.014564514,0.011199951,-0.02571106,-0.036346436,-0.018981934,-0.025939941,0.017410278,0.00013625622,-0.020339966,-0.02255249,0.03665161,-0.004749298,0.015007019,-0.037231445,0.04449463,-0.018066406,-0.008857727,0.010368347,0.008796692,0.05444336,0.055389404,-0.051116943,0.01838684,0.022918701,-0.032592773,0.0036144257,0.040161133,-0.017578125,-0.021591187,-0.056396484,-0.031173706,-0.0090408325,-0.013916016,-0.041931152,0.001376152,0.0107040405,0.027282715,0.016799927,-0.0022239685,-0.013954163,0.010314941,-0.01751709,-0.053009033,-0.0062026978,-0.047027588,0.0030288696,0.03451538,-0.015609741,-0.007835388,0.0017604828,0.0037651062,-0.0049934387,0.007965088,0.017318726,-0.0015926361,-0.05633545,0.042236328,0.0075302124,0.01676941,0.04437256,0.026550293,0.0413208,0.009651184,0.047912598,0.006958008,-0.026611328,-0.058654785,0.014030457,-0.026168823,0.0031986237,-0.0021648407,-0.021469116,-0.008407593,-0.010025024,-0.030960083,-0.022079468,0.03060913,-0.00920105,0.010566711,0.024475098,-0.034210205,-0.034301758,-0.057373047,-0.02078247,0.0017461777,0.07489014,0.024414062,-0.0032043457,-0.058380127,-0.017791748,0.023376465,-0.011650085,0.022735596,-0.015686035,-0.007282257,-0.0090408325,-0.035461426,-0.03326416,-0.029464722,0.037353516,-0.0007572174,-0.0061454773,0.0093688965,0.0014715195,0.01739502,-0.009857178,0.004928589,0.03427124,-0.019241333,-0.0023555756,-0.033813477,0.02357483,0.012992859,-0.0022144318,-0.051971436,0.040374756,0.002029419,0.054840088,-0.035705566,-0.0061416626,0.0019397736,0.023132324,0.015640259,-0.031036377,-0.008132935,-0.002729416,-0.03729248,-0.08227539,0.031463623,-0.0206604,0.02381897,0.013252258,0.008506775,0.032928467,-0.023117065,0.013183594,0.022628784,-0.024917603,-0.014030457,-0.027328491,-0.03729248,-0.016235352,0.0032234192,-0.01927185,0.019927979,-0.016998291,0.0052490234,-0.015022278,-0.02456665,0.040283203,0.027267456,-0.007724762,0.027420044,0.009628296,0.017562866,0.039855957,0.0031833649,-0.047424316,0.02748108,-0.0059547424,0.005241394,-0.009902954,0.052764893,0.017608643,-0.018722534,-0.01436615,-0.004245758,-0.018447876,-0.017486572,-0.017730713,0.010612488,0.024307251,0.002954483,-0.032226562,0.027740479,0.0034313202,-0.025024414,-0.03074646,0.024795532,0.018966675,-0.038848877,0.025436401,0.01033783,0.06201172,-0.024887085,0.022628784,0.00043940544,0.049072266,0.025375366,0.010932922,-0.009880066,0.015106201,-0.014404297,0.016174316,-0.0061149597,-0.01134491,0.020233154,0.0011949539,0.016113281,0.018661499,0.010734558,-0.03161621,-0.028060913,-0.0010919571,-0.0036716461,-0.009780884,0.023712158,0.011634827,0.015434265,-0.02078247,0.026123047,0.013595581,-0.029907227,-0.013664246,-0.02798462,0.046447754,-0.0018138885,-0.0049591064,0.020553589,-0.009857178,0.009391785,-0.04724121,-0.008995056,0.022628784,0.001543045,-0.006450653,-0.051086426,-0.024795532,-0.0048065186,0.046142578,0.005809784,0.02330017,0.028259277,-0.00002604723,0.0037727356,0.010887146,0.0020961761,-0.01424408,-0.00868988,-0.049072266,-0.024124146,-0.004058838,0.0043296814,-0.025253296,0.021087646,-0.03189087,-0.019042969,0.005657196,-0.017211914,-0.0035419464,-0.018508911,0.01713562,0.029830933,-0.0015077591,0.018188477,-0.019042969,-0.02658081,0.0027256012,0.010902405,0.019592285,-0.02015686,0.019210815,-0.0073051453,-0.009811401,-0.000078737736,0.010787964,0.020568848,0.025115967,0.0060043335,0.03945923,-0.041534424,0.039154053,-0.01966858,0.008918762,0.006839752,-0.035247803,-0.016357422,-0.02545166,-0.015319824,0.03314209,-0.02645874,-0.00031805038,-0.023132324,-0.033966064,-0.011886597,-0.056121826,0.023544312,0.025512695,0.045654297,-0.02557373,-0.0068969727,0.011909485,0.007331848,-0.0068969727,0.004508972,-0.01777649,0.02935791,0.027374268,-0.0015354156,-0.028305054,-0.032592773,-0.010925293,-0.006904602,-0.058746338,-0.051483154,-0.022613525,0.020507812,-0.0025863647,0.008460999,-0.025863647,-0.036132812,0.0057296753,-0.038085938,0.009010315,-0.0036144257,0.022781372,0.014007568,-0.010566711,0.003435135,0.01979065,-0.025512695,0.026824951,-0.012496948,-0.008163452,-0.058013916,0.0049095154,0.043914795,0.02558899,-0.003288269,-0.020446777,-0.00014638901,-0.03173828,-0.04663086,-0.010894775,0.004425049,-0.008522034,0.0023212433,-0.006576538,-0.04888916,-0.00843811,-0.035949707,-0.011817932,0.015914917,0.01727295,0.0010118484,-0.000954628,0.0034313202,0.009468079,-0.0067100525,-0.03265381,0.0008559227,0.011260986,-0.0074043274,0.016830444,0.054840088,-0.0044403076,-0.020217896,-0.011077881,-0.0011854172,0.007843018,-0.018798828,0.0070381165,-0.010604858,0.016204834,-0.015914917,-0.012260437,-0.038909912,0.0054092407,0.066833496,0.00021028519,0.0105896,-0.008041382,-0.015594482,0.010894775,0.03817749,-0.049194336,-0.008102417,-0.032226562,0.037506104,-0.02507019,0.018600464,0.00034976006,0.013557434,-0.02468872,-0.049621582,0.0017404556,0.006916046,0.004219055,-0.066101074,-0.03149414,-0.07159424,-0.006198883,-0.031341553,-0.0287323,0.0038661957,0.00071144104,-0.029754639,-0.08691406,0.0023174286,0.06335449,-0.011398315,0.02607727,-0.016281128,0.015357971,0.05029297,-0.026550293,-0.0015659332,0.011184692,-0.02809143,-0.013648987,-0.025848389,0.029678345,-0.011154175,-0.009529114,0.012382507,-0.0023326874,0.018692017,-0.0029945374,0.030639648,-0.013092041,0.020645142,-0.0057792664,0.020111084,-0.015731812,-0.008544922,0.044799805,-0.043029785,0.02784729,0.01586914,-0.0005364418,0.0063095093,0.023040771,0.02670288,-0.04660034,-0.0050582886,0.030044556,0.009338379,0.029403687,-0.021865845,0.0546875,0.01423645,-0.008644104,0.010231018,-0.008995056,-0.0072364807,-0.033599854,-0.049072266,0.037719727,0.0072517395,0.014030457,-0.014167786,-0.008758545,0.018173218,0.0065345764,-0.010826111,-0.008880615,-0.020477295,-0.03503418,0.010284424,0.008270264,-0.005619049,0.008811951,0.027282715,0.030426025,0.03125,-0.001991272,-0.0107803345,0.012458801,0.031341553,-0.016052246,-0.0035114288,0.023147583,0.008781433,0.024429321,0.014152527,0.028305054,-0.04333496,-0.021987915,-0.02368164,-0.013618469,0.012397766,-0.00497818,0.0006427765,-0.005710602,0.0011510849,-0.004966736,-0.04043579,-0.0038719177,-0.029373169,-0.024337769,-0.002822876,-0.005886078,0.016738892,0.016021729,0.0057907104,-0.00017499924,-0.0078125,0.035491943,0.0026245117,-0.0012979507,0.03591919,0.036987305,0.02368164,-0.028869629,0.0011959076,-0.01322937,-0.013534546,0.0046043396,-0.023727417,0.021972656,0.044555664,-0.0063056946,-0.00043559074,-0.00472641,0.016098022,-0.014328003,0.012702942,0.006511688,0.017608643,-0.012557983,0.029022217,-0.043670654,0.009849548,0.027328491,-0.0004632473,-0.009239197,-0.036468506,-0.024398804,0.02758789,-0.0015745163,-0.011314392,0.039642334,-0.004272461,0.028045654,-0.013954163,-0.020889282,-0.004722595,-0.012611389,-0.028915405,0.011260986,-0.018966675,0.0041007996,0.016967773,-0.038848877,0.023529053,-0.03503418,0.0035686493,0.011383057,0.005458832,-0.021606445,-0.018432617,-0.0043029785,-0.007423401,-0.023986816,-0.000084877014,-0.008033752,0.05203247,0.023925781,0.040893555,0.03353882,0.010757446,0.013969421,-0.042266846,-0.014099121,-0.0039634705,-0.011741638,0.014343262,-0.03540039,0.039398193,0.03805542,-0.0015745163,0.0390625,0.03656006,0.030975342,-0.0009498596,0.016967773,-0.007926941,0.038970947,-0.031585693,0.013084412,0.000069618225,0.036132812,-0.029464722,0.00957489,0.00021147728,0.026031494,-0.012199402,0.036132812,0.06323242,0.027832031,-0.0011043549,0.046417236,-0.0049362183,-0.0051231384,0.001414299,-0.011886597,0.049804688,-0.00023305416,0.044891357,0.026687622,-0.00028848648,0.004951477,0.012756348,-0.014877319,-0.03604126,0.050842285,0.018997192,-0.024856567,0.0008325577,-0.0049552917,0.004283905,-0.033843994,-0.013671875,0.023666382,-0.00045514107,0.011146545,-0.0054473877,-0.011482239,-0.015449524,0.01965332,0.00022304058,0.0066604614,-0.013580322,0.025772095,0.026367188,0.006793976,0.025924683,0.00015175343,0.02458191,-0.025421143,-0.010047913,0.014183044,0.0090789795,0.0036964417,0.0042533875,0.026245117,0.021316528,0.051879883,0.03201294,-0.018814087,-0.00491333,0.017837524,0.019348145,0.006996155,0.039916992,0.022781372,0.008644104,0.041900635,0.044891357,0.025787354,-0.027526855,0.014297485,-0.009902954,0.014060974,-0.006259918,-0.009918213,0.01600647,-0.013885498,0.022491455,0.009353638,-0.0056037903,0.026565552,0.015701294,-0.003440857,0.0053138733,-0.005962372,0.019927979,-0.0041007996,0.0036258698,0.012916565,-0.0047912598,0.026428223,0.009468079,0.027404785,-0.029510498,0.039398193,0.0018815994,-0.015159607,-0.008956909,0.016845703,-0.05041504,-0.0035743713,-0.0064201355,-0.012237549,-0.035980225,0.015731812,0.02017212,-0.0031433105,0.01146698,0.0104522705,-0.0096588135,-0.002122879,0.03656006,0.012046814,-0.01259613,-0.0071640015,-0.013793945,0.024108887,0.044433594,0.0033569336,-0.0032215118,-0.020507812,0.014984131,0.015670776,-0.010681152,0.0034675598,0.0135650635,-0.0131073,-0.015411377,0.016448975,0.035095215,0.014450073,0.041503906,-0.02078247,-0.019622803,-0.0032253265,0.03567505,0.000808239,0.0010795593,-0.0073661804,0.023208618,-0.00957489,0.046203613,0.041992188,-0.0003619194,0.03543091,-0.009162903,-0.003189087,0.008575439,-0.019226074,0.024246216,-0.012542725,0.011405945,-0.002746582,0.022781372,-0.017028809,-0.04208374,-0.0031967163,-0.023529053,-0.023422241,-0.030288696,0.016571045,-0.007843018,0.026473999,0.035736084,0.022094727,-0.01739502,0.06689453,-0.0155181885,0.046417236,-0.011779785,-0.010353088,0.0574646,0.027069092,0.037872314,0.017059326,0.015945435,-0.030532837,0.009750366,0.035247803,0.024032593,0.009162903,0.00233078,-0.0109939575,0.02986145,-0.0078048706,0.026351929,-0.0007648468,0.0007715225,0.019577026,-0.008705139,-0.01763916,0.005279541,-0.0037631989,0.013793945,0.05871582,-0.006099701,-0.0030269623,-0.019622803,-0.006526947,0.028900146,0.0017290115,-0.008323669,-0.017288208,-0.020523071,0.010971069,-0.031173706,-0.0037784576,0.015106201,0.030075073,-0.061431885,-0.023849487,0.0068473816,0.03466797,-0.018798828,0.021575928,0.025604248,-0.015380859,0.009933472,0.04107666,-0.0038032532,0.029022217,-0.008125305,0.033416748,0.032226562,0.009246826,-0.018920898,0.014457703,0.0047035217,-0.011802673,0.0146484375,0.036193848,-0.0040893555,-0.0016899109,0.0025253296,0.002067566,0.002746582,0.008361816,-0.0121536255,0.0047836304,-0.0069618225,-0.004688263,0.024459839,0.005580902,0.0011901855,0.00082683563,0.0013217926,-0.014083862,0.011917114,0.045166016,0.0178833,-0.047851562,0.004386902,0.008934021,-0.003709793,-0.01586914,-0.021942139,-0.006713867,-0.03643799,0.007369995,0.018127441,0.0074043274,0.008781433,-0.020248413,-0.004383087,0.037231445,0.0071754456,0.0063552856,0.011726379,-0.0021820068,0.020111084,-0.018692017,-0.0013628006,-0.012527466,-0.007820129,0.01461792,0.009284973,-0.011756897,-0.03439331,0.013519287,0.0005340576,0.0079193115,0.0024337769,-0.0069770813,0.016357422,-0.011955261,-0.002254486,0.006549835,0.011474609,-0.001578331,-0.006526947,-0.017196655,0.029571533,0.05215454,-0.018096924,-0.0074768066,0.015586853,0.020614624,0.014892578,0.04284668,0.009796143,0.034606934,0.021774292,-0.0119018555,-0.024917603,0.025146484,-0.011604309,-0.02935791,0.023376465,0.0047569275,-0.013969421,0.02229309,0.006275177,0.0019311905,-0.033294678,-0.024429321,-0.020401001,-0.023406982,0.017028809,-0.0035858154,0.008224487,-0.023269653,-0.025421143,0.023269653,-0.01864624,-0.030960083,-0.017471313,-0.0048561096,-0.019515991,-0.05407715,-0.0030727386,-0.0078048706,0.007698059,-0.013763428,0.00818634,0.0025119781,0.04046631,-0.005054474,-0.0038795471,0.010322571,0.030761719,0.0030403137,0.0017709732,0.029464722,-0.020004272,-0.021728516,-0.023834229,0.008956909,-0.021224976,0.011520386,-0.007896423,0.030822754,0.012329102,-0.0104522705,0.00022244453,-0.020050049,0.0034008026,-0.010169983,-0.020889282,-0.024047852,0.01876831,0.02557373,0.001958847,-0.006378174,0.038482666,-0.019699097,-0.01209259,0.01309967,0.040893555,0.0026359558,0.036132812,-0.019470215,0.00881958,-0.031280518,0.0035514832,-0.01058197,0.002960205,0.008987427,-0.002828598,-0.0026569366,-0.0028324127,0.01600647,-0.014274597,0.0054779053,0.027694702,0.014083862,-0.0022888184,0.040039062,0.00995636,0.004447937,-0.01423645,-0.0052757263,0.025604248,0.051574707,0.007896423,-0.00097227097,-0.008071899,0.014030457,0.002456665,0.0048713684,0.01876831,-0.02067566,-0.044158936,-0.015533447,-0.04119873,0.03137207,0.0014314651,0.009735107,-0.012924194,0.0018548965,-0.0062675476,-0.028656006,-0.012962341,0.020217896,0.0036258698,-0.020767212,-0.0132751465,0.011924744,0.017990112,-0.036132812,-0.00025820732,-0.045043945,-0.035949707,-0.03491211,-0.011871338,0.020462036,-0.001206398,-0.000059187412,0.0041046143,0.00207901,-0.008132935,0.015075684,0.020721436,-0.009246826,-0.011856079,0.018875122,0.028701782,-0.017410278,0.0178833,-0.012229919,-0.0058898926,-0.00083732605,-0.0131073,0.027557373,-0.016067505,0.02671814,0.010223389,-0.015701294,0.025268555,0.0075187683,0.030578613,-0.020935059,-0.011764526,-0.014633179,-0.005695343,0.040252686,-0.008888245,-0.02067566,0.0087890625,-0.012512207,-0.031799316,-0.0022411346,0.017730713,0.021469116,-0.0026283264,0.04425049,-0.02192688,-0.0002361536,0.01676941,0.015075684,-0.022506714,0.008720398,0.04058838,0.003458023,0.005874634,0.0041656494,-0.005622864,-0.027694702,-0.00894928,0.010932922,-0.023162842,-0.015686035,0.017852783,0.022964478,0.043273926,-0.011505127,0.021102905,0.02999878,0.018203735,0.03729248,0.0047836304,0.03378296,0.0018730164,-0.022567749,0.001373291,0.0073776245,-0.025863647,0.009536743,-0.005870819,0.008140564,-0.03353882,0.01838684,0.00083112717,0.029907227,-0.005332947,0.0146865845,-0.023712158,-0.008399963,-0.025177002,0.010269165,-0.042175293,0.00491333,0.039642334,0.016998291,0.02268982,-0.0017223358,-0.033325195,0.03616333,0.05239868,0.011444092,-0.03994751,-0.018356323,0.007041931,-0.010314941,0.0045814514,0.008018494,-0.013381958,-0.02784729,-0.008239746,-0.009277344,0.0034809113,-0.016189575,0.02696228,0.019622803,0.0064582825,-0.0079574585,0.024841309,0.0029067993,-0.00089120865,0.0023059845,-0.011489868,0.035125732,0.032806396,-0.014060974,0.01689148,0.026123047,-0.04815674,0.053344727,-0.00070667267,0.02859497,-0.015274048,0.008544922,-0.041381836,-0.0109939575,-0.012779236,0.004299164],"createdAt":"2026-04-18T18:57:39.604Z","updatedAt":"2026-04-23T08:01:51.944Z","lastSeenAt":"2026-04-23T08:01:51.944Z","tsv":"'/api':171 '/api/v1/trades/149':91,221 '/docs':170 '/pricing':172 '/readme':174 '/request':17,34 '0.02':16,33,121,162 '000':110 '0x8335':115 '20':109 '2913':116 '402':207 '6':126 'Base network API' 'USDC API' 'accept':98 'access':96 'across':49 'advertis':104 'ai':10,27 'ai-inference' 'ai/ml':52 'analysi':140 'analyt':51 'api':4,21,41,77,95 'avail':200 'base':7,24,69,111,118 'bodi':227 'broader':129 'challeng':103,212 'classif':143 'classification' 'commit':85 'confirm':204 'connect':180 'content':186 'convers':155 'cost':107 'crypto-quotes' 'data':9,26,50,136,220 'data-analytics' 'decim':127 'document':165,195,215 'embed':144 'embeddings' 'enabl':40 'endpoint':14,31,48,59,89,132,202 'equal':120 'estim':152 'exampl':198 'exchang':147 'expect':229 'export':137 'expos':44 'extrem':167 'feed':146 'financ':11,28 'finance-data' 'finance/web3':54 'gas':151 'gate':3,20 'generat':157 'geocod':153 'geocoding' 'infer':53 'infrastructur':56 'insight':138 'key':78 'label':93 'limit':81 'list':131 'live':205 'low payment fee' 'lowpaymentfee.com':35 'marketplac':42 'maximum':106 'metric':134 'micropayment API' 'network':70 'offer':8,25 'openapi':190 'page':175 'pay':62 'pay-per-call API' 'pay-per-request':61 'payload':199 'per':63,122 'platform':5,22,130 'point':164 'post':99,226 'premium':94 'price':145,163 'prompt':182 'protocol':75 'quot':150 'rate':80,148 'render':177 'report':135 'request':64,100,123 'request/response':193 'requir':86 'return':206,223 'schema':194 'sentiment':139 'sentiment-analysis' 'settl':71 'spars':168 'spec':191 'specif':88,222 'summar':142 'text':141 'text-summarization' 'token':149 'trades API' 'unclear':218 'unit':112 'upfront':84 'usdc':66,114,124 'usdc-base' 'use':65,125 'util':13,30,57 'utility-apis' 'valid':154,210 'varieti':46 'via':72 'wallet':181 'without':214 'x402':2,19,39,74,102,211 'x402 API' 'x402-enabled':38 'x402-gated':1,18 'x402-payment'","prices":[{"id":"110f4460-64da-412c-ace4-dc319bb424a4","listingId":"114d926e-2b42-49ec-9ec0-4d3fb927671f","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/trades/149","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:39.604Z"}],"sources":[{"listingId":"114d926e-2b42-49ec-9ec0-4d3fb927671f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/149","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:39.604Z","lastSeenAt":"2026-04-23T08:01:51.944Z"}],"details":{"listingId":"114d926e-2b42-49ec-9ec0-4d3fb927671f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/149 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/149"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/149"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching trade data or analytics via a single paid API call without needing an API key","Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) on a per-request basis","Retrieving real-time crypto quotes, gas estimates, or exchange rates with micropayments","Using utility services like geocoding, validation, or data conversion without subscription commitments"],"bestFor":["Developers who want instant, keyless API access paid per request","AI agents that can settle x402 payments in USDC on Base","Projects needing low-cost micropayment-gated endpoints without rate limits"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Developers not set up for USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.184Z"},"updatedAt":"2026-04-23T08:01:51.944Z"}}