{"id":"b16eed1b-daad-43f0-9fd8-e24f09403f69","shortId":"MKTYUG","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/charges/96` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout. The response MIME type is application/json.\n\nDocumentation is extremely sparse — the docs, pricing, API, 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 detailed description of what this particular charge endpoint returns. The landing page lists many API paths but does not clarify what `/api/v1/charges/96` specifically provides versus the other listed endpoints. Prospective users should be aware that the actual functionality behind this endpoint is undocumented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific functionality of /api/v1/charges/96 ('Premium API Access') is undefined and cannot be distinguished from other listed endpoints","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/96","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/charges/96","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, confirming it accepts payments. However, documentation is essentially nonexistent — all doc/pricing/API pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what this specific endpoint actually returns. The listing is effectively a stub with confirmed liveness.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T04:06:16.140Z","embedding":[-0.02407837,-0.038208008,0.036102295,0.017913818,0.014625549,-0.028564453,-0.025299072,0.03753662,0.061645508,-0.07330322,0.025924683,-0.040527344,-0.026794434,-0.03955078,-0.030349731,0.008674622,-0.014266968,0.008605957,-0.039916992,0.02796936,0.027862549,-0.022399902,-0.01586914,0.038116455,-0.003780365,-0.0284729,-0.009216309,-0.009902954,-0.014213562,-0.03741455,0.020324707,-0.026809692,-0.0068588257,0.01965332,-0.0119018555,-0.018966675,-0.019714355,0.03567505,0.0357666,-0.0042152405,0.0034236908,-0.0552063,-0.001748085,-0.0022335052,-0.061065674,-0.0043945312,0.005634308,-0.012916565,-0.0055122375,0.010116577,-0.03567505,-0.0009765625,-0.017333984,-0.005657196,0.009307861,0.0054512024,-0.008422852,-0.0007071495,0.004634857,0.013175964,-0.00048708916,-0.07208252,-0.01789856,-0.0059890747,-0.00019180775,0.05670166,-0.0044898987,0.050994873,0.0036125183,0.053222656,0.048980713,0.05041504,0.032836914,0.011260986,0.0050735474,0.0035533905,0.005973816,0.06347656,-0.010391235,-0.0034427643,-0.027832031,-0.0046195984,-0.051971436,-0.003929138,-0.024276733,-0.041534424,-0.019897461,0.018859863,-0.020507812,0.016021729,-0.064208984,0.0017995834,-0.02671814,-0.00007611513,-0.0007843971,0.0024147034,-0.0119018555,0.027511597,-0.014785767,0.019073486,0.0109939575,-0.041778564,0.0107421875,0.015602112,0.04525757,0.04522705,0.028244019,0.034240723,0.001996994,-0.024856567,-0.0129470825,0.027862549,-0.02104187,-0.020889282,0.014968872,0.017852783,-0.015945435,0.015052795,-0.033081055,0.016143799,-0.05041504,0.04006958,0.03479004,-0.013168335,0.0206604,-0.05142212,-0.018554688,0.008155823,-0.033081055,-0.0075263977,0.023925781,0.012199402,0.03326416,-0.030929565,-0.017181396,-0.0042495728,-0.022949219,-0.03161621,-0.054656982,-0.030792236,0.038085938,-0.028686523,0.03111267,0.039794922,-0.09857178,-0.008621216,-0.040161133,0.0027809143,-0.045928955,-0.011657715,-0.010063171,0.025497437,-0.018997192,-0.015670776,-0.023605347,-0.019088745,0.0023059845,0.030960083,-0.027923584,0.044769287,-0.0096206665,0.026855469,0.0061912537,0.0002092123,0.03326416,0.036010742,0.001244545,-0.068725586,-0.0847168,-0.03161621,-0.01360321,-0.021347046,-0.035125732,-0.009124756,0.0026988983,-0.07519531,-0.028366089,-0.016143799,-0.0075187683,-0.03137207,-0.00081825256,-0.029830933,0.01991272,-0.002948761,-0.07293701,-0.015464783,-0.015731812,0.07489014,0.030960083,0.015068054,0.027297974,-0.017440796,0.058135986,0.016860962,-0.035339355,-0.035980225,0.032714844,-0.012496948,0.018310547,0.0016775131,0.005519867,-0.03164673,0.04083252,0.06384277,0.020812988,-0.019927979,0.0027160645,-0.051971436,-0.042114258,-0.04244995,0.008857727,-0.00062322617,0.0040016174,0.031311035,-0.027282715,-0.041290283,-0.0014705658,0.0078125,0.0047912598,0.050842285,0.012489319,-0.004928589,0.005130768,0.012130737,-0.040161133,0.04434204,0.027755737,0.013168335,-0.021652222,-0.026306152,0.023254395,0.024520874,-0.041503906,0.006263733,-0.026657104,0.0206604,0.010574341,0.025604248,0.027404785,-0.020645142,-0.02482605,-0.023773193,-0.00919342,0.029708862,0.015197754,-0.029510498,-0.04336548,-0.08203125,0.055725098,0.033172607,0.05014038,0.0023097992,0.010513306,-0.025482178,-0.014907837,-0.07293701,0.057159424,0.08300781,-0.012397766,-0.017974854,0.009529114,-0.011024475,-0.030853271,-0.008621216,-0.005970001,-0.025497437,-0.025436401,0.009025574,-0.044647217,-0.0022888184,0.013969421,0.019989014,0.064819336,-0.011123657,-0.061553955,-0.02722168,-0.0016775131,0.0067481995,-0.017150879,0.0051078796,-0.017181396,0.02255249,0.01625061,-0.0075531006,0.023071289,-0.0012693405,0.01675415,-0.0044898987,-0.0050811768,-0.023773193,-0.02293396,0.005054474,-0.0071411133,-0.05871582,0.011314392,0.0018348694,0.06542969,-0.049102783,0.046875,-0.0071868896,-0.0028438568,0.058135986,-0.0012969971,-0.059661865,0.015106201,0.026229858,0.026229858,0.04586792,0.015014648,-0.036376953,-0.0035572052,0.078125,-0.015289307,-0.0044059753,0.015319824,0.010444641,0.02128601,-0.0011434555,-0.061279297,-0.03451538,-0.011169434,-0.025924683,0.02180481,-0.026901245,0.025970459,-0.026779175,0.0023059845,-0.01687622,0.0023937225,-0.03643799,0.019973755,-0.026382446,0.0134887695,-0.025802612,-0.010421753,0.012611389,0.0061187744,-0.02218628,0.008781433,0.04168701,0.028900146,-0.009590149,-0.03942871,-0.025024414,-0.011428833,0.007850647,0.025253296,0.024597168,0.017150879,0.046447754,-0.045074463,0.022125244,0.03375244,0.013702393,0.03781128,-0.005290985,-0.0010461807,-0.062683105,-0.057525635,-0.025894165,-0.037750244,0.03692627,0.012245178,-0.005996704,0.047576904,0.0052948,-0.01739502,-0.034057617,0.021759033,-0.0473938,-0.0064888,0.040283203,-0.008422852,-0.042114258,-0.005493164,0.0043144226,0.0018129349,0.03289795,0.015556335,0.0010480881,0.06262207,0.0357666,0.0026245117,0.029571533,0.017684937,0.012756348,0.004585266,-0.036987305,-0.02468872,-0.0071792603,0.024398804,-0.01210022,-0.017730713,-0.06719971,0.05178833,0.039642334,0.08331299,0.018844604,0.00831604,0.03302002,-0.0093307495,0.013137817,-0.025894165,-0.018844604,-0.028030396,-0.05090332,0.033843994,-0.020095825,-0.019577026,-0.020828247,0.044769287,0.007133484,0.02331543,-0.029296875,0.054473877,0.007835388,-0.005054474,0.022705078,0.013931274,0.041381836,0.06945801,-0.03918457,0.02949524,0.022567749,-0.04534912,0.0038795471,0.04888916,-0.020431519,-0.0031814575,-0.066223145,-0.015960693,0.0042419434,-0.010475159,-0.053222656,-0.0045814514,0.0031337738,0.0143966675,0.027297974,-0.0053710938,-0.036865234,0.005809784,-0.026550293,-0.050872803,-0.0058403015,-0.03515625,0.0025501251,0.054779053,-0.035583496,0.0037059784,0.0068588257,-0.009635925,-0.007385254,-0.0017528534,0.018539429,-0.008544922,-0.04525757,0.021255493,0.0118637085,0.013000488,0.005569458,0.043884277,0.026687622,0.0234375,0.049438477,0.01285553,-0.026138306,-0.058929443,0.03137207,-0.045013428,0.0076675415,0.015777588,-0.021347046,-0.007534027,-0.02960205,-0.027114868,-0.03479004,-0.0030059814,-0.016525269,0.0058021545,0.019683838,-0.026123047,-0.03479004,-0.05429077,-0.016342163,-0.008720398,0.069885254,0.029724121,-0.005138397,-0.0635376,-0.012962341,0.02394104,0.0154418945,0.008331299,-0.015159607,-0.011810303,-0.0030155182,-0.03781128,-0.0070343018,-0.019607544,0.013893127,-0.0052452087,-0.0063819885,0.04196167,0.006313324,0.019989014,-0.002067566,0.015464783,0.047088623,-0.030639648,-0.0045204163,-0.03463745,0.026657104,-0.0052604675,-0.0017633438,-0.053497314,0.034240723,0.0181427,0.02810669,-0.026107788,0.0024604797,-0.00024271011,0.015335083,0.018630981,-0.005908966,-0.0051879883,-0.00067281723,-0.05456543,-0.05621338,0.04031372,-0.025527954,0.022232056,0.012611389,0.0048828125,0.023590088,-0.008369446,0.0030288696,0.023040771,-0.029937744,-0.008956909,-0.020599365,-0.03817749,-0.014091492,-0.005554199,-0.01826477,0.023239136,-0.020324707,0.018432617,-0.0005426407,-0.020950317,0.018707275,-0.0035991669,-0.0004940033,0.021850586,-0.0073776245,0.018920898,0.050872803,0.007484436,-0.041412354,0.028930664,-0.0019683838,0.009925842,-0.013534546,0.041534424,0.03378296,-0.008987427,-0.0070114136,-0.0058250427,-0.01234436,-0.017791748,-0.004261017,0.016845703,0.026245117,0.0017251968,-0.03878784,0.024963379,0.0058135986,-0.027786255,-0.012016296,0.01725769,0.021697998,-0.030822754,0.03277588,0.029815674,0.06549072,-0.017181396,-0.00030946732,0.013031006,0.02368164,0.028045654,0.02330017,-0.023483276,0.017318726,-0.006664276,0.014701843,-0.01537323,0.0027332306,0.018554688,-0.0008649826,0.022521973,0.019042969,0.004219055,-0.020462036,-0.024871826,0.009422302,-0.018157959,-0.0146484375,0.016204834,0.0231781,0.015602112,-0.026779175,0.024627686,0.015014648,-0.02935791,-0.023071289,0.0022296906,0.049194336,-0.021255493,-0.021453857,0.011192322,0.008895874,0.040039062,-0.060150146,0.0015850067,0.016555786,0.01133728,-0.025772095,-0.037963867,-0.038513184,0.02279663,0.033416748,0.008171082,0.019927979,0.037902832,0.008079529,0.005870819,0.025756836,0.003194809,-0.019699097,-0.007881165,-0.032562256,-0.0002002716,-0.004043579,-0.0051345825,-0.02168274,0.005508423,-0.018188477,-0.03262329,0.012237549,-0.013427734,-0.0013427734,-0.004009247,0.021987915,0.039855957,-0.008842468,0.004173279,-0.0211792,-0.017684937,0.0024642944,-0.0040130615,0.020889282,-0.047912598,0.005718231,-0.01600647,-0.0046577454,0.008628845,0.0029392242,0.020431519,0.02507019,0.00315094,0.025497437,-0.042541504,0.039154053,-0.03768921,0.017730713,0.01398468,-0.040252686,-0.0046081543,-0.01725769,-0.016174316,0.03265381,-0.017990112,-0.012008667,-0.014427185,-0.03189087,-0.0007200241,-0.058013916,0.022644043,0.03010559,0.03213501,-0.020889282,-0.00089502335,0.0017633438,-0.0056877136,-0.01940918,0.00724411,-0.027786255,0.01574707,0.00806427,0.010055542,-0.034729004,-0.0113220215,-0.020645142,0.0070381165,-0.050750732,-0.04473877,-0.016525269,0.008888245,-0.018112183,-0.010437012,-0.03050232,-0.025878906,0.0041923523,-0.05340576,0.015686035,0.011741638,0.022460938,0.0079956055,-0.015640259,-0.010429382,0.010612488,-0.011924744,0.03967285,0.0014648438,-0.006542206,-0.026824951,-0.0075912476,0.032958984,0.024230957,-0.0008134842,-0.0039100647,-0.010215759,-0.017654419,-0.05215454,-0.007118225,-0.0077590942,-0.002632141,0.0021381378,0.012779236,-0.049316406,-0.0043182373,-0.026351929,0.0009860992,0.029891968,0.011856079,0.015930176,-0.0039367676,-0.0039863586,-0.009590149,-0.016921997,-0.033935547,0.030578613,0.011375427,0.0026855469,0.012046814,0.03768921,0.0039634705,-0.0019350052,-0.000910759,0.0022888184,0.020233154,-0.035217285,0.00096321106,-0.020751953,0.0099105835,-0.018295288,-0.0066604614,-0.03189087,-0.006717682,0.08666992,-0.0017032623,-0.01260376,-0.005645752,-0.034301758,0.018417358,0.019577026,-0.05038452,0.00073337555,-0.041290283,0.022079468,-0.03100586,0.020217896,0.0033226013,0.015335083,-0.03289795,-0.06561279,-0.013511658,0.005935669,-0.020629883,-0.05834961,-0.016159058,-0.06317139,-0.010192871,-0.0048675537,-0.017608643,-0.0066566467,0.013633728,-0.021102905,-0.080444336,0.0034561157,0.04940796,0.005393982,0.021408081,-0.012756348,0.02041626,0.020492554,-0.028259277,-0.0082092285,0.027755737,-0.01651001,-0.0082473755,-0.012992859,0.01373291,-0.014450073,-0.017456055,0.02319336,0.015548706,0.01638794,0.0015029907,0.013092041,-0.016845703,0.010307312,-0.002632141,0.01008606,-0.0082092285,-0.0062026978,0.0357666,-0.051849365,0.023895264,0.03253174,-0.0011949539,-0.0005874634,0.021499634,0.036712646,-0.03262329,-0.017349243,0.024963379,-0.0024108887,0.040771484,-0.033477783,0.041046143,0.015533447,-0.01713562,0.013809204,-0.0035533905,-0.019317627,-0.034851074,-0.034210205,0.030395508,0.0020370483,0.0135269165,-0.010955811,0.0045318604,0.01007843,-0.010444641,0.015777588,-0.0135650635,-0.021575928,-0.0060043335,0.0013284683,0.0029506683,0.0025844574,-0.0049057007,0.02708435,0.012168884,0.03540039,0.0018596649,0.00111866,0.0018167496,0.027755737,-0.017425537,0.0099105835,0.018814087,0.010101318,0.02557373,0.012016296,0.00409317,-0.037475586,-0.010795593,-0.026397705,-0.0008673668,0.0022335052,-0.0041275024,-0.015808105,-0.007850647,0.00040531158,-0.0059890747,-0.032165527,0.009796143,-0.029708862,-0.01789856,-0.0015869141,-0.013320923,0.012054443,0.004211426,0.0073509216,0.010848999,0.0042495728,0.050109863,0.004211426,-0.0016155243,0.02178955,0.032104492,0.017608643,-0.034118652,-0.0069999695,-0.0070381165,0.004421234,-0.0011148453,-0.025115967,0.01373291,0.043914795,-0.0029411316,0.016830444,-0.008811951,0.02772522,-0.0076789856,0.015930176,-0.008834839,0.016723633,-0.005012512,0.027709961,-0.038482666,0.011184692,0.025405884,0.00040912628,-0.009902954,-0.018203735,-0.029083252,0.015342712,0.011329651,-0.011451721,0.04699707,-0.00025749207,0.02609253,-0.026016235,-0.0121536255,0.011650085,-0.036010742,-0.01689148,0.041290283,0.0015058517,-0.0047454834,0.018798828,-0.034362793,0.037139893,-0.036224365,0.023254395,-0.0079956055,-0.0035953522,-0.0038490295,-0.015609741,-0.028533936,-0.016204834,-0.0115737915,0.012260437,0.0038070679,0.043640137,0.01612854,0.035308838,0.05557251,0.019454956,0.0044937134,-0.036743164,-0.026443481,-0.005657196,-0.03213501,0.015838623,-0.00207901,0.048187256,0.032684326,0.002046585,0.03314209,0.03945923,0.03036499,0.0027313232,0.017929077,-0.012283325,0.005470276,-0.0016860962,0.027832031,-0.0012378693,0.041290283,-0.020599365,0.026321411,0.011810303,0.034484863,-0.031585693,0.021270752,0.067993164,0.014320374,-0.01663208,0.044677734,-0.0015230179,-0.01979065,-0.019058228,-0.009140015,0.051940918,0.019378662,0.049804688,0.055145264,0.016159058,-0.013786316,0.018066406,-0.034301758,-0.030563354,0.072387695,0.026123047,-0.02041626,-0.020324707,-0.0033950806,0.009300232,-0.057861328,-0.029174805,0.01209259,-0.008666992,0.011428833,-0.008468628,-0.012023926,-0.017807007,0.017242432,0.024246216,0.013748169,-0.022766113,0.019897461,0.030883789,0.0035057068,0.02407837,-0.0008893013,0.017929077,-0.03173828,-0.01977539,0.017608643,0.015075684,-0.017974854,-0.00724411,0.024459839,0.011856079,0.047607422,0.03677368,-0.0071983337,0.010398865,0.028533936,0.015731812,-0.008514404,0.048095703,0.044830322,0.0135650635,0.04043579,0.035583496,0.03286743,-0.03829956,0.015716553,0.00059986115,0.015174866,0.005214691,-0.0115356445,0.013618469,-0.01550293,0.012916565,-0.0004911423,-0.016921997,0.025756836,0.03074646,-0.0035095215,-0.010314941,-0.011062622,0.0041122437,-0.020065308,-0.0018577576,0.0017766953,-0.013999939,0.028427124,0.007858276,0.023117065,-0.027130127,0.018066406,-0.00932312,-0.019485474,-0.0046195984,0.013031006,-0.04296875,0.002500534,-0.001364708,0.0004286766,-0.035614014,0.014228821,0.026809692,-0.009162903,0.026168823,0.0055160522,0.0024719238,0.0064964294,0.017440796,0.014877319,-0.0051345825,-0.012084961,-0.016479492,0.04119873,0.04144287,0.0006546974,0.00969696,-0.02178955,-0.005290985,0.006324768,-0.0035591125,-0.0055503845,-0.0045204163,-0.02949524,-0.026428223,0.01687622,0.042785645,0.02935791,0.031173706,-0.0093688965,-0.028289795,0.003047943,0.029541016,0.0015926361,0.0014257431,-0.011222839,0.014915466,-0.01210022,0.049865723,0.025558472,0.010375977,0.03152466,-0.011985779,-0.021621704,0.015930176,-0.020721436,0.03060913,-0.015701294,0.0016975403,-0.011405945,0.027786255,-0.014175415,-0.02619934,0.00945282,-0.014320374,-0.014076233,-0.025848389,-0.0000060796738,0.015075684,0.023223877,0.0345459,0.016174316,-0.019546509,0.06903076,-0.008079529,0.054138184,-0.010475159,-0.0039711,0.05142212,0.032958984,0.04385376,0.017959595,0.0039138794,-0.03503418,0.007331848,0.03845215,0.026611328,0.0012187958,-0.0006427765,-0.011604309,0.037475586,0.0010128021,0.019470215,-0.016174316,-0.0041999817,0.008514404,-0.0039901733,-0.0051193237,0.006084442,-0.014076233,0.003862381,0.04421997,-0.03137207,-0.006587982,-0.027938843,-0.014450073,0.029327393,-0.003156662,-0.00015223026,0.0038471222,-0.016921997,0.017410278,-0.027938843,-0.019119263,0.012481689,0.028564453,-0.04348755,-0.022628784,0.005428314,0.010108948,-0.019821167,0.032562256,0.019744873,-0.004272461,-0.00021958351,0.042541504,-0.013465881,0.028320312,-0.011856079,0.025360107,0.026351929,0.0058135986,-0.013145447,0.0042762756,0.013595581,-0.01348114,0.011009216,0.04034424,-0.010284424,0.0065727234,-0.0040397644,-0.024627686,0.006629944,0.001540184,-0.011299133,0.004447937,-0.0132369995,-0.013381958,0.0071640015,0.0079422,0.0070266724,0.011566162,-0.02458191,-0.0044059753,0.0056419373,0.03643799,0.023025513,-0.040283203,0.00060653687,0.004283905,0.00831604,-0.02658081,-0.016525269,-0.0035495758,-0.03225708,0.014808655,0.012969971,0.007358551,0.010940552,-0.020370483,-0.0046920776,0.03479004,0.011268616,0.027175903,0.0051574707,0.003917694,0.015731812,-0.018035889,-0.0035572052,-0.003616333,-0.011802673,0.006290436,0.01158905,-0.0005221367,-0.028961182,0.027893066,0.0006337166,0.01234436,-0.0012702942,-0.023010254,0.01586914,-0.011009216,-0.020721436,0.006504059,0.015197754,-0.013412476,-0.011711121,-0.01689148,0.025146484,0.049743652,-0.0060310364,-0.007045746,0.02394104,0.017364502,0.012023926,0.03894043,0.011428833,0.04562378,0.022460938,-0.021316528,-0.009712219,0.027832031,-0.010955811,-0.037261963,0.016052246,-0.013542175,-0.014839172,0.010055542,0.022201538,-0.0079956055,-0.025054932,-0.020111084,-0.011787415,-0.019119263,0.019927979,-0.009048462,0.01348114,-0.021560669,-0.01373291,-0.0019416809,-0.02279663,-0.05267334,-0.027938843,-0.002040863,-0.015174866,-0.046081543,0.009010315,-0.028533936,0.016525269,-0.018722534,-0.016937256,-0.015090942,0.028045654,-0.020462036,-0.008979797,0.009674072,0.023391724,0.019210815,0.0118255615,0.022445679,-0.034729004,-0.03579712,-0.023406982,-0.004081726,-0.018188477,0.012954712,0.00957489,0.036071777,0.01474762,-0.008056641,-0.0031738281,-0.010848999,-0.0009598732,-0.009056091,-0.026641846,-0.014907837,0.021987915,0.021896362,-0.014175415,-0.017791748,0.038482666,-0.028900146,-0.006214142,0.027359009,0.04333496,0.01209259,0.019317627,-0.018417358,-0.006614685,-0.015388489,0.0038433075,-0.019119263,0.008628845,0.008430481,-0.0007209778,-0.010795593,-0.001458168,0.023422241,-0.0079956055,-0.014251709,0.023712158,0.0011005402,-0.020965576,0.029327393,0.012512207,0.012084961,0.0015239716,-0.009765625,0.026611328,0.037994385,0.009986877,0.0023155212,0.00020599365,0.010475159,-0.006904602,0.014450073,0.016021729,-0.01890564,-0.041046143,-0.024551392,-0.029815674,0.020401001,0.015357971,0.021743774,-0.0059394836,0.011077881,-0.029006958,-0.029541016,-0.018844604,0.02268982,0.0036735535,-0.011711121,-0.010635376,0.0020885468,0.022644043,-0.036743164,0.0059394836,-0.030899048,-0.031280518,-0.0074539185,-0.02607727,0.02178955,0.016204834,-0.008163452,-0.0011453629,-0.0030899048,-0.00548172,0.0026836395,0.03475952,-0.017303467,-0.010002136,0.019378662,0.015548706,-0.029281616,0.011627197,-0.018463135,-0.0059013367,0.018554688,-0.010932922,0.011604309,-0.016937256,0.03302002,0.006111145,0.0009098053,0.031799316,-0.0027370453,0.0071525574,-0.020889282,0.007820129,0.0019350052,-0.0063171387,0.036499023,-0.017562866,-0.017318726,0.010353088,-0.01676941,-0.026306152,0.00349617,0.023834229,0.046020508,-0.003107071,0.03552246,-0.023269653,-0.021118164,0.012397766,0.0028514862,-0.022109985,-0.0020198822,0.039489746,0.0055122375,-0.009994507,-0.010604858,-0.018859863,-0.032806396,-0.0072784424,0.02444458,-0.0020961761,-0.0143966675,0.014556885,0.00699234,0.053253174,0.004673004,0.020965576,0.018997192,0.0002040863,0.025039673,-0.00060606,0.052825928,-0.010299683,-0.029067993,0.008842468,-0.0005917549,-0.028289795,-0.013786316,-0.009567261,0.007713318,-0.042297363,0.01386261,-0.014183044,0.03894043,-0.021591187,0.012641907,-0.0317688,-0.00079107285,-0.028900146,-0.012428284,-0.02911377,0.016326904,0.034729004,-0.004245758,0.018310547,0.0036087036,-0.022842407,0.019165039,0.049713135,-0.0076179504,-0.024963379,-0.008651733,0.02519226,-0.0022602081,0.009590149,0.009963989,-0.0058135986,-0.023651123,-0.001950264,-0.023529053,0.0055503845,-0.014015198,0.0134887695,-0.0013790131,0.002658844,0.00207901,0.027404785,0.0098724365,-0.0038337708,0.008049011,0.007511139,0.031799316,0.035827637,-0.01550293,0.024108887,0.020492554,-0.035247803,0.058166504,0.0021038055,0.032836914,-0.019485474,-0.0023784637,-0.031311035,-0.028656006,-0.009056091,0.000067055225],"createdAt":"2026-04-18T18:45:38.624Z","updatedAt":"2026-04-23T21:32:04.457Z","lastSeenAt":"2026-04-23T21:32:04.457Z","tsv":"'/api/v1/charges/96':110,223 '/request':13,28 '0.02':12,27,88,140 '000':129 '0x8335':134 '20':128 '2913':135 '300':161 '6':144 'Base network API' 'USDC micropayment API' 'accept':117 'access':7,22,38,115 'actual':238 'address':158 'advertis':123 'ai/ml':59 'amount':126 'analysi':62 'analyt':58 'api':6,21,37,55,100,114,177,216 'application/json':169 'awar':235 'base':9,24,96,130,137 'behind':240 'broad':48 'call':4,19 'catalog':49 'challeng':122 'charg':208 'clarifi':221 'classif':64 'commit':105 'connect':185 'content':191 'convers':81 'crypto-paid API' 'data':57 'decim':145 'descript':203 'detail':202 'doc':175 'document':170 'embed':65 'endpoint':32,84,109,209,230,242 'equal':139 'estim':75 'exact':152 'exampl':199 'exchang':70 'extrem':172 'feed':69 'financ':66 'function':239 'gas':74 'generat':82 'geocod':79 'given':141 'host':46 'infer':60 'infrastructur':77 'json-response' 'key':101 'label':112 'land':212 'limit':103 'list':214,229 'lowpaymentfee' 'lowpaymentfee.com':34 'made':148 'mani':215 'max':125 'mime':166 'network':97 'no-api-key' 'openapi':195 'page':180,213 'paid':91 'particular':207 'path':217 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':51 'payment':42,146 'payto':157 'per':3,18,53,89 'post':118 'post-method' 'premium':5,20,36,113 'premium API access' 'price':68,86,176 'prompt':187 'prospect':231 'protocol':43 'provid':35,225 'quot':73 'rate':71,102 'readm':179 'render':182 'request':54,90,119 'request/response':198 'requir':106 'respons':165 'return':210 'schema':196 'scheme':153 'second':162 'sentiment':61 'site':45 'span':56 'spars':173 'specif':108,224 'specifi':156 'summar':63 'timeout':163 'token':72 'type':167 'undocu':244 'unit':131 'usdc':15,30,93,133,142 'usdc-base' 'user':232 'util':78 'valid':80 'versus':226 'via':10,25,39,149 'wallet':186 'web3':67 'x402':11,26,41,121,151 'x402 API' 'x402-payment'","prices":[{"id":"f1c05842-6e40-48b4-9f7f-4340c377e6a8","listingId":"b16eed1b-daad-43f0-9fd8-e24f09403f69","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/charges/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:38.624Z"}],"sources":[{"listingId":"b16eed1b-daad-43f0-9fd8-e24f09403f69","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/96","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:38.624Z","lastSeenAt":"2026-04-23T21:32:04.457Z"}],"details":{"listingId":"b16eed1b-daad-43f0-9fd8-e24f09403f69","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/96 \\\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 402 with x402 challenge advertising 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/charges/96"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/96"},{"claim":"All APIs priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Site lists APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing paid API services without traditional API key registration","Making micropayment-gated API calls using USDC on Base","Agent-driven programmatic access to premium endpoints via x402 protocol"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet","High-volume use cases where $0.02/request adds up significantly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.878Z"},"updatedAt":"2026-04-23T21:32:04.457Z"}}