{"id":"cb79150a-40d4-43b3-b66f-41512bdf550f","shortId":"P27vz3","kind":"x402","title":"Pay-per-request API collection on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API collection on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/collections/46` is labeled \"Premium API Access\" and accepts POST requests, settling payments in USDC (contract 0x8335…2913) on Base. The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.\n\nThe broader platform organizes its APIs into 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 with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/collections/46` endpoint specifically returns. The endpoint is live (returns a proper 402 x402 challenge), but without documentation it is unclear what data or functionality this particular collection endpoint provides versus the individually named endpoints listed on the homepage.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","post-method","no-api-key","pay-per-use"],"categories":["api-marketplace","data","ai","finance","infrastructure"],"synonyms":["low payment fee","x402 api","pay per request api","micropayment api","base network api","usdc api","402 payment api","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, and README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format for /collections/46","Purpose of the /collections/46 endpoint is unclear — it may be a bundle or a specific resource but this is not documented","No request or response examples available anywhere in the crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/46","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/collections/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a wallet-connect prompt. The purpose of /collections/46 specifically is undocumented, making this 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":"2026-04-19T18:05:43.530Z","embedding":[-0.026794434,-0.04434204,0.034454346,0.003156662,0.014968872,-0.032348633,-0.020385742,0.029296875,0.05407715,-0.074645996,0.03503418,-0.07397461,-0.032196045,-0.033966064,-0.012748718,0.031921387,0.018951416,-0.0031967163,-0.038757324,0.031082153,0.024841309,-0.015357971,-0.024169922,0.021453857,-0.0109939575,-0.004627228,-0.009468079,0.0022888184,-0.025405884,-0.04434204,0.04574585,-0.026931763,0.00095653534,0.027664185,0.0016298294,0.010688782,-0.009284973,0.049926758,0.030960083,0.0051879883,-0.00087594986,-0.049926758,0.020492554,-0.010520935,-0.04675293,-0.011833191,0.033447266,-0.037841797,-0.0069885254,-0.0008158684,-0.042816162,0.025619507,-0.00894928,0.0017404556,0.020080566,-0.0033130646,-0.026367188,-0.005142212,0.00932312,0.009399414,0.01348114,-0.042877197,-0.015464783,-0.002916336,0.0048828125,0.062561035,-0.016036987,0.06274414,0.006034851,0.070007324,0.027420044,0.044830322,0.025650024,0.00178051,0.005832672,-0.010864258,-0.0047950745,0.06842041,-0.018417358,-0.017929077,-0.021408081,-0.022750854,-0.033325195,-0.019134521,-0.017105103,-0.0501709,-0.021972656,0.025619507,-0.03387451,0.015899658,-0.07873535,0.00014090538,-0.02798462,-0.00013124943,0.003227234,-0.01637268,-0.009521484,0.026275635,-0.0019016266,0.026733398,0.0061416626,-0.04776001,0.019515991,0.012245178,0.03967285,0.057373047,0.015670776,0.023757935,0.010932922,-0.014350891,-0.040893555,0.00043439865,-0.019241333,-0.010360718,0.012268066,0.011009216,-0.028701782,0.011009216,-0.028793335,0.01210022,-0.04473877,0.042510986,0.022064209,-0.0011825562,0.004928589,-0.0473938,-0.009407043,0.00982666,-0.019363403,-0.00881958,0.040222168,0.0076789856,0.03466797,-0.019515991,-0.0046310425,-0.0042266846,-0.017715454,-0.005050659,-0.04220581,-0.023864746,0.041809082,-0.026733398,0.017425537,0.044128418,-0.088256836,0.0030918121,-0.044433594,0.008369446,-0.014122009,-0.015991211,-0.00097227097,0.026275635,-0.01600647,-0.001253128,-0.03137207,-0.013900757,-0.0038223267,0.038116455,-0.014831543,0.046081543,-0.0047187805,0.005832672,0.012214661,0.008384705,0.027450562,0.027145386,-0.012954712,-0.07171631,-0.07733154,-0.017593384,-0.0074386597,-0.00014674664,-0.031188965,-0.0057411194,-0.010856628,-0.064941406,-0.03201294,-0.020492554,0.011962891,-0.03744507,-0.0014848709,-0.03414917,0.0077705383,-0.011932373,-0.05001831,-0.017150879,-0.035247803,0.0637207,0.013298035,0.02355957,0.020736694,-0.00033211708,0.038085938,0.026611328,-0.01651001,-0.035217285,0.01763916,-0.0060310364,0.017501831,-0.0027008057,0.0025157928,-0.0035419464,0.057037354,0.057891846,0.015930176,-0.014015198,-0.014579773,-0.06317139,-0.046936035,-0.04119873,0.013404846,0.023086548,-0.0017223358,0.032104492,-0.03265381,-0.038085938,0.008811951,0.008003235,-0.0015859604,0.06072998,0.03262329,0.0158844,0.023345947,0.027954102,-0.02468872,0.018051147,0.02848816,-0.0026435852,-0.017150879,-0.03390503,0.03451538,0.04812622,-0.038085938,0.016540527,-0.013450623,0.011711121,-0.023025513,0.012290955,0.023162842,-0.0007033348,-0.021255493,-0.032318115,-0.025299072,0.03439331,0.0107040405,-0.031036377,-0.032714844,-0.07836914,0.043914795,0.02809143,0.048980713,-0.01586914,0.01171875,-0.032592773,-0.005268097,-0.053863525,0.032806396,0.07348633,-0.02418518,0.005619049,0.011512756,0.0068893433,-0.036499023,0.0059928894,-0.028167725,-0.021652222,-0.022399902,0.009811401,-0.03729248,0.023544312,0.017333984,0.049468994,0.06347656,-0.014404297,-0.055389404,-0.010063171,-0.0063819885,-0.019195557,-0.015640259,0.005126953,0.007598877,0.012023926,0.04232788,0.013092041,0.03463745,-0.0074310303,0.0050735474,0.010398865,0.01727295,-0.006832123,-0.022781372,0.013175964,0.0027675629,-0.07080078,0.011054993,-0.019058228,0.05859375,-0.061706543,0.04748535,-0.010787964,0.019180298,0.030471802,-0.012680054,-0.053009033,0.018188477,0.01600647,0.0033016205,0.031707764,0.0045280457,-0.020568848,-0.0016736984,0.067993164,-0.047058105,-0.023834229,0.021621704,0.037017822,0.030792236,-0.0067749023,-0.052764893,-0.021972656,-0.01876831,-0.040222168,0.034454346,0.009536743,0.022262573,-0.012901306,0.018753052,-0.03164673,-0.0020713806,-0.03692627,0.012176514,-0.023498535,-0.0039978027,-0.011680603,-0.0012140274,-0.011772156,0.029586792,-0.018859863,0.012481689,0.037719727,0.022903442,-0.013435364,-0.031188965,-0.017349243,-0.012718201,0.008590698,0.017349243,0.034332275,0.010643005,0.047943115,-0.017868042,0.005054474,0.017959595,0.029876709,0.038879395,0.0050354004,-0.005645752,-0.07702637,-0.053131104,-0.017868042,-0.036102295,0.022064209,0.022491455,-0.020828247,0.04699707,0.011543274,-0.019958496,-0.04598999,0.0038394928,-0.041931152,-0.003200531,0.037841797,-0.020584106,-0.03756714,-0.0026626587,0.0059928894,0.0018863678,0.03213501,0.023284912,0.019851685,0.062347412,0.03010559,0.017303467,0.024993896,0.035125732,0.03010559,0.00762558,-0.013252258,-0.025726318,-0.00042414665,0.028274536,-0.031829834,-0.018096924,-0.060516357,0.07733154,0.02104187,0.064453125,0.010749817,0.01210022,0.054534912,-0.013923645,0.009109497,-0.027191162,-0.013908386,-0.017974854,-0.02947998,0.034362793,-0.010902405,0.020248413,-0.030334473,0.041107178,-0.005012512,0.010406494,-0.035095215,0.03463745,-0.01234436,-0.0234375,0.039855957,-0.003353119,0.040802002,0.05114746,-0.05166626,0.020996094,0.00605011,-0.031585693,0.023727417,0.05847168,-0.032226562,-0.03564453,-0.05419922,-0.031082153,-0.0014533997,0.0012140274,-0.038330078,-0.0026283264,0.008956909,0.025680542,0.025756836,0.003534317,-0.007572174,0.018417358,-0.009094238,-0.075927734,0.016082764,-0.045898438,0.001420021,0.06317139,-0.018951416,-0.017303467,-0.003944397,-0.02923584,-0.01096344,0.016235352,0.030212402,-0.0069274902,-0.04171753,0.031799316,-0.0025959015,0.022644043,-0.0033893585,0.041290283,0.04437256,0.020629883,0.046142578,0.025741577,-0.021530151,-0.079589844,0.021026611,-0.044433594,0.007865906,0.029006958,-0.02999878,0.0075263977,-0.010276794,-0.022094727,-0.03488159,0.00491333,-0.016448975,-0.0008778572,0.014663696,-0.022766113,-0.049621582,-0.054534912,-0.03552246,-0.0007786751,0.059661865,0.035247803,0.009521484,-0.028839111,-0.016067505,0.009315491,0.010368347,0.018600464,-0.015274048,-0.0079956055,0.00043177605,-0.03857422,-0.018829346,-0.024169922,0.03289795,0.013442993,-0.00001692772,0.030715942,0.005996704,0.028167725,0.0029296875,0.0063705444,0.029541016,-0.032196045,0.0034179688,0.0039253235,0.04360962,0.008148193,-0.011566162,-0.033966064,0.06384277,0.007171631,0.03640747,-0.03314209,-0.008094788,-0.013595581,0.009056091,0.0043678284,-0.019638062,-0.012420654,-0.01159668,-0.045135498,-0.048431396,0.037597656,0.0025615692,0.021652222,0.012268066,0.009315491,0.020202637,-0.006298065,0.0046844482,0.005722046,-0.032104492,-0.014930725,-0.0317688,-0.03857422,-0.02104187,-0.0149383545,-0.023422241,0.023239136,-0.018173218,0.014350891,-0.004497528,-0.020111084,0.040283203,0.009025574,0.015899658,0.026153564,-0.015022278,0.014472961,0.03829956,0.021865845,-0.04446411,0.034851074,-0.0051879883,0.0069007874,0.0011720657,0.04534912,0.038482666,-0.0044403076,0.0046577454,-0.0030536652,-0.02067566,-0.017196655,-0.010116577,-0.0010824203,0.003929138,-0.013587952,-0.05709839,0.018844604,0.006996155,-0.028518677,-0.04171753,0.007633209,0.029129028,-0.035888672,0.012893677,0.009414673,0.06359863,-0.030639648,0.010093689,0.011222839,0.045410156,0.029296875,0.009185791,-0.015396118,0.02748108,0.0071983337,0.010887146,0.0008049011,-0.011138916,0.024093628,0.0066604614,0.027267456,0.011764526,0.0050964355,-0.017929077,-0.029769897,0.00067329407,-0.018798828,-0.018676758,0.029327393,0.026031494,0.019683838,-0.012069702,0.022399902,0.0054779053,-0.0047950745,-0.031921387,0.0016422272,0.032318115,-0.01171875,-0.016082764,-0.0023384094,0.007411957,0.027175903,-0.06896973,-0.013343811,0.010574341,0.012413025,-0.022705078,-0.034118652,-0.040222168,0.00381279,0.035491943,0.00680542,0.029083252,0.03289795,0.006515503,0.0074386597,0.030548096,0.00021243095,0.0010690689,-0.020584106,-0.038360596,-0.015060425,0.00085163116,-0.000644207,-0.045135498,0.015327454,-0.030181885,-0.028549194,0.01525116,-0.037231445,-0.01448822,-0.0062408447,0.015640259,0.022491455,-0.008491516,0.01448822,-0.012573242,-0.032073975,-0.0040893555,0.012268066,0.033294678,-0.05230713,0.013679504,-0.018478394,0.00080251694,-0.0061531067,0.018951416,0.018112183,0.02166748,0.0028247833,0.04425049,-0.050628662,0.03463745,-0.012992859,0.021850586,0.0010356903,-0.036834717,-0.018615723,-0.023101807,-0.022232056,0.04534912,-0.026290894,-0.011993408,-0.03918457,-0.029266357,-0.026062012,-0.043762207,0.020019531,0.034210205,0.032928467,-0.010894775,0.0025024414,0.0062217712,0.009140015,-0.023956299,0.0015468597,0.004383087,0.015792847,0.024459839,0.0066719055,-0.047424316,-0.025848389,-0.0028972626,0.008934021,-0.0368042,-0.03643799,-0.011672974,0.0019378662,-0.00630188,-0.0020618439,-0.02607727,-0.040039062,-0.0021266937,-0.04135132,0.01739502,0.00020730495,0.017608643,0.019180298,-0.016311646,0.00283432,0.003955841,-0.020874023,0.031799316,0.0013446808,-0.013534546,-0.04626465,0.0004823208,0.027954102,0.015319824,-0.010688782,-0.02470398,-0.009918213,-0.017578125,-0.04510498,-0.0034484863,0.0070495605,-0.012168884,0.005634308,0.0054130554,-0.046051025,-0.011390686,-0.034973145,-0.00031375885,0.037750244,0.011154175,0.0013418198,0.00059080124,0.010215759,0.006980896,-0.009109497,-0.042236328,0.023513794,0.011543274,0.00039744377,0.04345703,0.0519104,0.0015821457,-0.017028809,0.0047187805,0.017471313,0.0043029785,-0.013671875,0.029586792,-0.026412964,0.017974854,0.0014533997,-0.0057525635,-0.034179688,-0.007068634,0.07409668,0.0019159317,0.002407074,0.008384705,0.005847931,0.013633728,0.028121948,-0.03125,0.004966736,-0.036010742,0.017166138,-0.011184692,0.017974854,0.005847931,0.0124435425,-0.01939392,-0.039733887,-0.009559631,0.008323669,-0.015991211,-0.06854248,-0.027450562,-0.07165527,-0.008598328,-0.0017204285,-0.03527832,-0.0024108887,0.023391724,-0.016571045,-0.08581543,0.00856781,0.06274414,0.00031757355,0.01411438,-0.01083374,0.028945923,0.022369385,-0.044403076,-0.01525116,0.017105103,-0.02670288,-0.012298584,-0.010734558,0.021743774,-0.0093307495,-0.0064582825,0.005970001,0.028915405,0.01020813,-0.009460449,0.01776123,-0.011993408,0.023834229,-0.012062073,0.018081665,-0.009300232,-0.0184021,0.041870117,-0.06842041,0.0050735474,0.017715454,-0.0016784668,0.020477295,0.035705566,0.05053711,-0.04449463,-0.014205933,0.031799316,0.019592285,0.042419434,-0.020339966,0.036987305,-0.0014848709,-0.013587952,0.0135650635,-0.005207062,-0.00843811,-0.047576904,-0.026733398,0.028701782,-0.012428284,-0.0107040405,-0.02217102,0.019729614,0.0071105957,-0.0037899017,0.004852295,-0.020706177,-0.018447876,-0.012130737,-0.006828308,0.008781433,0.012893677,-0.011123657,0.020217896,0.0236969,0.03289795,0.005443573,0.0045166016,0.030319214,0.03137207,-0.009689331,0.004852295,0.026275635,0.014556885,0.02255249,0.0067329407,-0.0054626465,-0.047973633,-0.014526367,-0.030685425,-0.014831543,-0.005924225,-0.017211914,-0.0057258606,-0.005592346,-0.005531311,-0.012863159,-0.014434814,0.007331848,-0.034484863,-0.033477783,-0.028625488,-0.0038700104,0.028869629,0.017089844,0.011131287,0.021362305,-0.0015335083,0.041381836,0.020645142,-0.0044288635,0.03744507,0.02809143,0.01689148,-0.023117065,-0.0075263977,0.009674072,-0.00043797493,0.006298065,-0.020614624,0.009208679,0.039978027,-0.0006842613,0.0039024353,-0.0007696152,0.02444458,-0.010574341,0.0045433044,0.0074310303,0.020767212,-0.029449463,0.04534912,-0.046173096,0.005970001,0.015960693,0.012496948,-0.012046814,-0.013793945,-0.030334473,0.0019683838,0.0064048767,0.003501892,0.056274414,-0.0041160583,0.026504517,-0.022094727,-0.012420654,0.003484726,-0.016647339,-0.012130737,0.014984131,-0.0072364807,0.0053482056,0.003129959,-0.024505615,0.019302368,-0.037322998,0.009712219,-0.00042128563,-0.0017309189,-0.008804321,-0.01638794,-0.02041626,-0.010116577,-0.01852417,0.00072813034,-0.013206482,0.053588867,0.01751709,0.043914795,0.04650879,0.021209717,0.020568848,-0.04119873,-0.040039062,-0.011016846,-0.02229309,0.027069092,-0.017059326,0.045776367,0.03729248,0.024673462,0.030426025,0.03491211,0.037872314,-0.004245758,0.01473999,-0.012680054,0.010299683,-0.0038852692,0.0104599,-0.010231018,0.038269043,-0.024871826,0.011116028,0.011039734,0.020050049,-0.040985107,0.045043945,0.06628418,0.013870239,-0.006160736,0.027908325,-0.0048332214,-0.025543213,-0.009117126,-0.010643005,0.05908203,0.021347046,0.053955078,0.031402588,0.0049819946,-0.014472961,0.017807007,-0.03768921,-0.016601562,0.0635376,0.03564453,-0.024612427,-0.014015198,-0.0067825317,0.008308411,-0.030853271,-0.018203735,0.019424438,0.016403198,0.024887085,-0.0029563904,-0.006175995,-0.015380859,-0.0034618378,0.017425537,0.003156662,-0.020828247,0.027557373,0.017059326,-0.005001068,0.023925781,0.010887146,0.036071777,-0.023712158,-0.017715454,0.015686035,0.02381897,-0.012741089,-0.002811432,0.017608643,-0.0011062622,0.043518066,0.042388916,-0.00712204,-0.004436493,0.018035889,0.021987915,-0.000831604,0.053009033,0.024093628,0.018753052,0.03857422,0.033294678,0.018508911,-0.032989502,0.015670776,-0.005092621,0.002412796,-0.008880615,-0.017807007,0.011543274,-0.02305603,0.013702393,0.0022735596,-0.016830444,0.0181427,0.02961731,0.0007863045,-0.0008678436,-0.008277893,-0.0015993118,-0.02961731,-0.011390686,0.007858276,0.0058403015,0.015975952,0.013687134,0.02798462,-0.026229858,0.03100586,-0.014846802,-0.01701355,-0.011199951,0.012161255,-0.0395813,0.0055885315,0.015319824,-0.0054244995,-0.047912598,0.013031006,0.021469116,-0.00843811,0.017456055,0.0069770813,0.0051994324,-0.0074501038,0.034454346,0.01828003,-0.013343811,-0.00945282,-0.02619934,0.0068473816,0.04348755,0.01008606,0.012649536,-0.028625488,0.0012130737,-0.0030612946,-0.0022258759,-0.006538391,-0.0069274902,-0.0070610046,-0.009918213,0.022018433,0.027664185,-0.0041503906,0.041015625,-0.018081665,-0.01473999,-0.0001373291,0.040039062,0.010597229,-0.00027155876,-0.0143966675,0.014328003,-0.025054932,0.044036865,0.03555298,0.0015449524,0.021759033,-0.019958496,-0.00970459,0.014770508,-0.012359619,0.022109985,-0.015449524,0.02015686,-0.017852783,0.03302002,-0.023101807,-0.039764404,0.009391785,-0.014831543,-0.025146484,-0.022460938,0.021621704,-0.0017786026,0.020507812,0.03540039,0.01751709,-0.033203125,0.068359375,-0.031585693,0.046569824,-0.01335144,-0.0021247864,0.039489746,0.015411377,0.03463745,0.022491455,-0.0013914108,-0.038726807,0.021209717,0.044281006,0.026947021,0.011604309,-0.00007086992,-0.027236938,0.041503906,0.0056610107,0.030258179,0.0041656494,-0.0017080307,0.014930725,-0.0072250366,-0.013191223,0.000104010105,0.0019416809,0.009284973,0.03475952,-0.022994995,-0.011726379,-0.017822266,-0.012954712,0.030929565,-0.00061035156,-0.0020122528,-0.0013847351,-0.02659607,0.010559082,-0.033111572,-0.022781372,0.0075263977,0.029586792,-0.04800415,-0.02609253,0.009963989,0.012306213,-0.017242432,0.031921387,0.016418457,-0.012107849,0.013885498,0.02557373,-0.0028858185,0.024383545,-0.018508911,0.016799927,0.051116943,-0.007457733,-0.007820129,0.0071907043,0.0155181885,-0.013504028,0.008010864,0.030319214,-0.012397766,0.0011510849,-0.0018072128,-0.0016069412,-0.007385254,-0.0076789856,-0.005054474,-0.00076055527,-0.0029716492,-0.01701355,0.009010315,0.007980347,-0.004180908,0.010345459,-0.012992859,-0.0010528564,0.0011100769,0.0362854,0.024856567,-0.038726807,0.004096985,0.009498596,0.0015745163,-0.023345947,0.0038166046,-0.00022304058,-0.034057617,0.023895264,0.0154800415,0.010910034,0.004585266,-0.0262146,0.0134887695,0.035247803,0.0074920654,0.015808105,0.008277893,-0.013504028,0.014663696,-0.01852417,-0.012504578,0.002878189,-0.00868988,0.0040397644,0.021728516,0.0043754578,-0.022033691,0.035980225,-0.008117676,0.007896423,0.0018777847,-0.021987915,0.023468018,-0.008712769,-0.003189087,-0.0008792877,0.019485474,-0.009605408,-0.021652222,-0.0028877258,0.021148682,0.060028076,-0.015792847,-0.014564514,0.026306152,0.026275635,0.016998291,0.036865234,0.01374054,0.045532227,0.014099121,-0.033996582,-0.021713257,0.01737976,-0.0064582825,-0.014190674,0.01713562,-0.00730896,-0.022491455,0.014152527,0.008659363,-0.005458832,-0.030929565,-0.021469116,-0.0124053955,-0.032226562,0.01171875,-0.013191223,0.017074585,-0.018936157,-0.019088745,0.016220093,-0.023544312,-0.026931763,-0.020095825,0.005596161,-0.015991211,-0.05911255,0.008453369,-0.029830933,0.015640259,-0.020889282,0.0011873245,-0.0069084167,0.037475586,-0.013244629,0.00045275688,0.0011444092,0.019073486,0.024780273,0.007499695,0.024612427,-0.023803711,-0.033172607,-0.017547607,0.001619339,-0.007949829,0.016555786,0.010566711,0.027557373,0.02116394,-0.0058555603,0.004558563,-0.010604858,0.0036945343,-0.0064315796,-0.023513794,-0.013000488,0.014312744,0.013191223,-0.008346558,-0.0061531067,0.024749756,-0.013336182,-0.015464783,0.015655518,0.038116455,0.0008382797,0.02456665,-0.01574707,-0.014205933,-0.030075073,0.014663696,-0.020401001,0.01335907,0.0061187744,0.0009937286,-0.0012578964,0.013313293,0.028579712,-0.00573349,-0.0066108704,0.021560669,0.008987427,0.012054443,0.031311035,0.022460938,0.008560181,-0.026565552,-0.015571594,0.022521973,0.04586792,0.003501892,0.00793457,0.0048446655,0.004047394,-0.013725281,0.01171875,0.018737793,-0.02748108,-0.03967285,-0.009384155,-0.013290405,0.029556274,-0.00030136108,0.021026611,-0.0032310486,0.015182495,-0.019592285,-0.042755127,-0.025924683,0.028305054,0.017318726,-0.005203247,-0.008102417,-0.0009202957,0.014152527,-0.032592773,-0.0070610046,-0.0390625,-0.033996582,-0.021438599,-0.011451721,0.031188965,0.011688232,-0.011634827,0.0072021484,0.0043907166,-0.015449524,0.013473511,0.013534546,-0.022079468,-0.008544922,0.0234375,0.0146102905,-0.030960083,0.017791748,0.001083374,-0.005924225,0.017349243,-0.009262085,0.005332947,-0.023117065,0.034179688,-0.01625061,0.0023117065,0.030929565,0.0067596436,0.016601562,-0.026412964,0.023803711,-0.0028305054,0.005821228,0.046691895,-0.017532349,-0.025924683,0.014015198,-0.0062942505,-0.017288208,-0.00022029877,0.017303467,0.03060913,-0.009315491,0.047210693,-0.014564514,0.0053901672,0.004436493,0.0184021,-0.02204895,-0.0028800964,0.025482178,-0.0045051575,0.0016174316,0.006717682,-0.015167236,-0.037750244,-0.020629883,0.018341064,0.0077400208,-0.0206604,0.023040771,0.0058670044,0.054748535,-0.020263672,0.0027923584,0.025802612,-0.0033187866,0.0259552,0.0103302,0.036132812,0.00881958,-0.046203613,-0.0018358231,-0.013801575,-0.03012085,0.00522995,0.014862061,0.0018730164,-0.03363037,0.017700195,-0.003921509,0.0154800415,-0.004875183,0.007171631,-0.016616821,-0.00029706955,-0.037841797,-0.0014305115,-0.034454346,0.012176514,0.045074463,0.027816772,0.018585205,0.004924774,-0.009803772,0.019744873,0.047088623,-0.010368347,-0.037261963,-0.01586914,0.012123108,0.006248474,0.027328491,0.0053634644,-0.0090408325,-0.017700195,0.0055351257,-0.012107849,0.007270813,-0.008552551,0.009643555,0.008605957,-0.011154175,-0.014793396,0.019470215,-0.0047721863,0.0072517395,0.0055503845,0.005458832,0.02192688,0.018844604,-0.013160706,0.021575928,0.012268066,-0.038970947,0.048431396,-0.005012512,0.031219482,-0.018585205,0.0074691772,-0.03656006,-0.016189575,-0.011924744,0.0033721924],"createdAt":"2026-04-19T05:29:51.707Z","updatedAt":"2026-04-22T02:31:46.209Z","lastSeenAt":"2026-04-22T02:31:46.209Z","tsv":"'/api/v1/collections/46':64 '/call':19,38 '/collections/46':204 '0.02':18,37,101,152 '000':91 '0x8335':79 '20':90 '2913':80 '402':215 '402 payment api' '6':96 'accept':71 'access':50,69 'advertis':86 'ai':12,31,120 'analysi':124 'analyt':114 'api':5,24,48,68,109,157,173 'base':8,27,58,82,92 'base network api' 'base-network' 'broader':105 'categori':112 'challeng':85,217 'classif':127 'collect':6,25,42,230 'commit':165 'connect':182 'contract':78 'convers':144 'data':11,30,113,117,225 'decim':97 'descript':200 'detail':189 'doc':172 'document':167,220 'embed':128 'endpoint':16,35,49,62,148,205,209,231,237 'equal':100 'estim':138 'exampl':197 'exchang':133 'export':118 'extrem':169 'feed':132 'financ':13,32,129 'four':111 'function':227 'gas':137 'generat':145 'geocod':142 'homepag':241 'host':40 'individu':235 'infrastructur':140 'insight':119 'key':158 'label':66 'learn':122 'limit':161 'list':147,238 'live':211 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':121 'maxamountrequir':88 'metric':115 'micropayment api' 'minimum':164 'name':236 'network':59 'no-api-key' 'openapi':193 'organ':107 'page':177 'particular':229 'pay':2,21,45 'pay per request api' 'pay-per-request':1,20,44 'pay-per-use' 'payment':54,75 'per':3,22,46,102,153 'per-request-billing' 'platform':106 'post':72 'post-method' 'premium':67 'price':131,150,174 'prompt':184 'proper':214 'protocol':55 'provid':232 'quot':136 'rate':134,160 'readm':176 'render':179 'report':116 'request':4,23,47,73,103,154 'request/response':196 'requir':166 'return':207,212 'schema':194 'sentiment':123 'settl':74 'spars':170 'specif':61,206 'summar':126 'technic':188 'text':125 'token':135 'unclear':223 'unit':93 'usdc':77,99 'usdc api' 'usdc-settlement' 'util':15,34,141 'valid':143 'versus':233 'via':9,28,51 'wallet':183 'web3':130 'without':219 'x402':10,29,53,84,216 'x402 api' 'x402-payment'","prices":[{"id":"79a5904a-7651-485c-861c-84fddb8527b5","listingId":"cb79150a-40d4-43b3-b66f-41512bdf550f","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/collections/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T05:29:51.707Z"}],"sources":[{"listingId":"cb79150a-40d4-43b3-b66f-41512bdf550f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:51.707Z","lastSeenAt":"2026-04-22T02:31:46.209Z"}],"details":{"listingId":"cb79150a-40d4-43b3-b66f-41512bdf550f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/46 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/46"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs in four categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/46"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing data analytics or AI inference endpoints without subscription commitments","Making one-off API calls with crypto micropayments on Base","Integrating pay-per-use utility services (geocoding, validation, conversion) into agent workflows"],"bestFor":["Developers wanting no-signup, no-API-key access to common utility endpoints","AI agents that can settle x402 payments in USDC on Base","Users who prefer pay-per-call pricing over monthly subscriptions"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume use cases where per-call pricing may not be cost-effective","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.442Z"},"updatedAt":"2026-04-22T02:31:46.209Z"}}