{"id":"67881266-0b57-48bc-8252-21b03052381d","shortId":"EDt4dd","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 an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/transactions/207` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation 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 spec, no request/response schema documentation, and no usage examples available from the crawled content. The actual functionality behind this specific `/transactions/207` endpoint is unclear beyond its generic \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto-paid API","serverless API payment"],"warnings":["No OpenAPI spec or schema documentation available","Docs, API, pricing, and README pages all render only 'Connect wallet' with no content","The specific functionality of /api/v1/transactions/207 ('Premium API Access') is undocumented and unclear","No request body schema or response schema is documented anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/207","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/transactions/207","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 pricing and payment details. However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual functionality of this specific endpoint (/api/v1/transactions/207) is entirely opaque — 'Premium API Access' is a generic label with no explanation of what data or service it provides.","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":"2026-04-19T12:38:42.891Z","embedding":[-0.03765869,-0.03930664,0.042785645,0.02027893,0.011291504,-0.025390625,-0.02078247,0.038360596,0.074401855,-0.070617676,0.034301758,-0.041381836,-0.035186768,-0.033294678,-0.02154541,0.011878967,-0.0029525757,0.0076179504,-0.038909912,0.034576416,0.013320923,-0.015327454,-0.03692627,0.026260376,-0.0044822693,-0.009567261,-0.0059814453,-0.0036945343,-0.024978638,-0.047973633,0.039031982,-0.027023315,-0.0036525726,0.008361816,-0.015296936,-0.0057029724,-0.00079488754,0.036224365,0.028198242,-0.011726379,0.0043258667,-0.06518555,0.0053710938,-0.018508911,-0.04638672,-0.0022296906,0.010818481,-0.026428223,0.00434494,0.0013914108,-0.04006958,-0.010551453,-0.011688232,0.0048294067,0.0057029724,0.0031414032,-0.008300781,0.0016775131,0.020614624,0.004234314,-0.010574341,-0.06555176,-0.019042969,-0.006259918,0.0005879402,0.05529785,-0.005592346,0.036712646,0.003900528,0.062683105,0.03314209,0.043640137,0.027755737,0.021957397,0.0020751953,0.0030879974,-0.004802704,0.06359863,-0.01675415,-0.03604126,-0.011856079,-0.025421143,-0.05545044,0.00047969818,-0.0085372925,-0.048614502,-0.019561768,0.027618408,-0.021911621,0.024291992,-0.073791504,0.0020580292,-0.0052261353,0.0012741089,0.003967285,-0.008644104,-0.016174316,0.01663208,-0.012283325,0.006767273,0.0008468628,-0.03970337,0.025970459,0.01727295,0.030227661,0.046936035,0.018630981,0.024597168,0.009918213,0.0057029724,-0.020751953,0.015235901,-0.0047035217,-0.014816284,0.020629883,-0.00004220009,-0.015106201,0.018859863,-0.029220581,0.022476196,-0.04751587,0.053100586,0.007713318,0.0048713684,-0.00060653687,-0.05029297,-0.017715454,0.02180481,-0.025360107,0.0012254715,0.015144348,0.0206604,0.027511597,-0.009689331,-0.025939941,0.0015201569,-0.020950317,-0.007171631,-0.04800415,-0.038604736,0.03829956,-0.03250122,0.018539429,0.04586792,-0.106933594,-0.012916565,-0.057800293,0.0064849854,-0.034423828,-0.015312195,-0.006565094,0.012268066,-0.024795532,-0.010482788,-0.017120361,-0.028457642,-0.0073890686,0.042785645,-0.01360321,0.04434204,-0.022232056,0.032409668,0.01524353,0.0105896,0.025466919,0.025177002,-0.0064735413,-0.077697754,-0.08465576,-0.017715454,0.0038108826,-0.029190063,-0.036621094,0.0096206665,-0.009262085,-0.10308838,-0.022415161,-0.020004272,-0.0118637085,-0.031036377,-0.004825592,-0.0390625,0.018325806,-0.0154418945,-0.044921875,-0.019882202,-0.03643799,0.0602417,0.029403687,0.021972656,0.022583008,-0.020523071,0.053771973,0.028411865,-0.011680603,-0.013938904,0.01335144,-0.028045654,0.01373291,-0.009506226,0.011520386,-0.030303955,0.02923584,0.07421875,-0.005836487,-0.029296875,-0.0087890625,-0.056549072,-0.038909912,-0.028320312,0.017547607,0.0155181885,-0.0124435425,0.027542114,-0.029525757,-0.029754639,-0.00060892105,0.01461792,0.005443573,0.053253174,0.0118637085,-0.007926941,0.034057617,0.023712158,-0.0491333,0.033599854,0.045928955,0.011650085,-0.021911621,-0.036743164,0.022537231,0.045288086,-0.029266357,0.013656616,-0.014892578,0.027572632,-0.012123108,0.010002136,0.015274048,-0.011772156,-0.030853271,-0.03048706,-0.009544373,0.033416748,0.011917114,-0.022155762,-0.030151367,-0.08428955,0.04547119,0.042022705,0.029373169,0.001709938,-0.0017881393,-0.020202637,-0.010101318,-0.07318115,0.06072998,0.076660156,0.00081443787,-0.0105896,0.036376953,-0.012573242,-0.03326416,0.00283432,-0.020843506,-0.030593872,-0.02027893,0.016571045,-0.04107666,-0.0013475418,0.020736694,0.017959595,0.040893555,-0.0058403015,-0.047943115,-0.030700684,-0.010894775,0.004737854,-0.034179688,-0.008483887,-0.0032806396,0.020187378,0.023651123,-0.005332947,0.017105103,-0.0020942688,0.0073547363,-0.0066947937,0.010093689,-0.014564514,-0.027908325,0.01576233,0.0044822693,-0.0597229,0.0021533966,-0.012031555,0.07489014,-0.045684814,0.04067993,-0.022232056,0.019744873,0.055023193,-0.009552002,-0.04837036,0.009902954,0.025115967,0.025131226,0.0418396,0.023345947,-0.027862549,-0.012321472,0.07574463,-0.006904602,-0.0009331703,0.019073486,0.0066108704,0.038238525,-0.0066566467,-0.05429077,-0.035461426,0.002313614,-0.038513184,0.027435303,-0.016448975,0.03161621,-0.022232056,0.0042762756,-0.031799316,-0.002380371,-0.022109985,0.0061531067,-0.017532349,0.005432129,-0.018798828,-0.021987915,0.012077332,0.008621216,-0.01739502,0.0010528564,0.045196533,0.011505127,-0.008888245,-0.023223877,-0.0390625,-0.0082092285,-0.0049552917,0.01663208,0.019805908,0.025115967,0.050476074,-0.031707764,-0.0012845993,0.02166748,0.009391785,0.04269409,0.00091552734,0.01260376,-0.05899048,-0.045318604,-0.018478394,-0.035339355,0.029846191,0.023468018,-0.002603531,0.057434082,0.018737793,-0.018188477,-0.021942139,0.015548706,-0.04638672,-0.0014820099,0.04638672,-0.013145447,-0.02670288,0.009391785,-0.00409317,-0.0013780594,0.043151855,0.02772522,0.03353882,0.06945801,0.040924072,0.006122589,0.023239136,-0.005508423,0.029129028,0.012878418,-0.023468018,-0.03189087,-0.020645142,0.025222778,-0.01979065,-0.01348114,-0.055358887,0.052246094,0.045806885,0.10076904,0.023620605,0.0011901855,0.03010559,-0.006198883,0.013290405,-0.012916565,-0.032806396,-0.02178955,-0.03567505,0.021118164,-0.005077362,-0.016296387,-0.018997192,0.03010559,-0.0014362335,0.022842407,-0.027877808,0.040802002,-0.019332886,-0.018661499,0.022613525,0.01701355,0.047454834,0.05895996,-0.034088135,0.027023315,0.019561768,-0.041259766,0.0035572052,0.039276123,-0.011123657,-0.0076828003,-0.03933716,-0.023269653,-0.0070228577,-0.012168884,-0.0501709,0.004436493,0.007835388,0.025115967,0.025131226,-0.008102417,-0.018295288,-0.010826111,-0.011154175,-0.048309326,-0.008468628,-0.037322998,0.0064926147,0.051940918,-0.028015137,0.0019512177,0.007972717,0.002298355,-0.007843018,0.011070251,0.027328491,-0.0049362183,-0.054138184,0.041809082,-0.005088806,0.019989014,0.010681152,0.028060913,0.029190063,0.028427124,0.042877197,0.0053634644,-0.009735107,-0.07269287,0.013809204,-0.04940796,0.004447937,0.027236938,-0.02456665,-0.0026130676,-0.014373779,-0.028411865,-0.01776123,0.015556335,-0.033477783,0.0037326813,0.021224976,-0.021362305,-0.029846191,-0.06463623,-0.0181427,-0.006893158,0.061920166,0.01802063,0.009010315,-0.066345215,-0.0034942627,0.026473999,0.005050659,0.025482178,-0.014579773,0.0003502369,-0.014411926,-0.034210205,-0.014472961,-0.018859863,0.02281189,-0.009483337,0.0021762848,0.01802063,0.01033783,0.016036987,0.01399231,0.002527237,0.02357483,-0.023025513,-0.010902405,-0.004096985,0.041625977,0.015609741,-0.018051147,-0.044952393,0.037353516,0.0079422,0.039886475,-0.037963867,-0.00843811,-0.0077667236,0.014595032,0.015075684,-0.007904053,-0.012626648,-0.018371582,-0.041809082,-0.07312012,0.043548584,-0.021850586,0.037200928,0.026428223,0.004108429,0.026229858,-0.012054443,0.0010290146,0.01889038,-0.023910522,-0.011177063,-0.024978638,-0.038482666,-0.018554688,-0.016647339,-0.029342651,0.0206604,-0.022979736,0.011703491,0.0023841858,-0.019729614,0.02267456,-0.0025177002,0.0028762817,0.013122559,0.009712219,0.02458191,0.03390503,0.020233154,-0.04638672,0.015365601,-0.006515503,0.0011539459,-0.008338928,0.046081543,0.019882202,-0.017547607,-0.0046043396,-0.011764526,-0.019165039,-0.031021118,0.0037231445,-0.007583618,-0.00094127655,-0.0007529259,-0.042175293,0.01424408,0.004257202,-0.03640747,-0.026138306,0.01991272,0.008148193,-0.030776978,0.027145386,0.032592773,0.046081543,-0.021591187,0.0033817291,0.00009441376,0.03894043,0.031555176,0.011795044,-0.008262634,0.031982422,-0.008453369,0.022140503,-0.0099487305,-0.014007568,0.0121154785,0.009056091,0.021453857,0.024124146,0.0076026917,-0.024749756,-0.042419434,0.0013914108,-0.010345459,-0.023590088,0.025772095,0.011985779,0.034118652,-0.021621704,0.023239136,0.0034160614,-0.01689148,-0.01638794,-0.011024475,0.03817749,-0.007572174,-0.015457153,0.014266968,0.010360718,0.022705078,-0.061157227,-0.0018701553,-0.0067481995,0.012481689,-0.015014648,-0.048217773,-0.036468506,0.010154724,0.032592773,0.00868988,0.022659302,0.0335083,-0.003955841,0.0064849854,0.026947021,-0.013381958,-0.0048446655,-0.0025405884,-0.05596924,-0.021591187,-0.009513855,0.007843018,-0.03640747,0.01260376,-0.0048942566,-0.022659302,0.012756348,-0.02407837,-0.006286621,-0.024978638,0.003921509,0.041137695,0.0020008087,0.017837524,-0.0181427,-0.032989502,-0.0026569366,0.015457153,0.015510559,-0.039916992,0.01939392,-0.017562866,-0.0033454895,0.00009012222,0.014701843,0.026779175,0.022262573,0.012046814,0.034606934,-0.04144287,0.050231934,-0.02885437,0.02458191,0.0018424988,-0.031036377,-0.012001038,-0.022659302,-0.0087509155,0.044708252,-0.02142334,-0.012779236,-0.034118652,-0.03149414,-0.0049476624,-0.05230713,0.009277344,0.03387451,0.04055786,-0.025009155,-0.0016307831,-0.0011768341,0.016830444,-0.007858276,0.013511658,-0.028945923,0.021621704,0.027542114,-0.0048446655,-0.01991272,-0.024459839,-0.01638794,-0.016662598,-0.04815674,-0.054779053,-0.012138367,0.0135269165,-0.011871338,-0.0031089783,-0.027648926,-0.0259552,-0.0036087036,-0.03604126,0.011268616,-0.0020141602,0.01612854,0.0015830994,-0.023101807,-0.002664566,0.0104599,-0.0069122314,0.033691406,0.014373779,0.002281189,-0.04864502,0.014816284,0.013916016,0.02822876,-0.009590149,-0.015777588,-0.006702423,-0.02279663,-0.056915283,-0.0006790161,-0.006629944,-0.015365601,-0.008987427,0.0059661865,-0.059783936,0.0007519722,-0.021896362,-0.005290985,0.021881104,0.009651184,0.019241333,0.0045700073,0.02293396,-0.0023899078,-0.009590149,-0.036224365,0.01626587,0.010551453,0.00447464,0.0256958,0.057434082,-0.0009469986,-0.03010559,0.006454468,0.006175995,0.013877869,-0.024765015,0.008964539,-0.020385742,0.022369385,-0.012252808,-0.012451172,-0.044708252,-0.0035305023,0.078125,-0.0044937134,-0.020248413,-0.012313843,-0.014205933,0.018432617,0.03366089,-0.03741455,-0.0067481995,-0.0231781,0.021957397,-0.021438599,0.0042037964,-0.0013809204,0.026885986,-0.019058228,-0.049835205,-0.020385742,-0.00737381,-0.014564514,-0.06341553,-0.029922485,-0.06427002,0.009056091,-0.011672974,-0.024780273,0.002374649,0.013626099,-0.019638062,-0.08581543,0.0039253235,0.05102539,0.0025043488,0.03439331,-0.0143966675,0.008369446,0.035186768,-0.034423828,-0.00088596344,0.022567749,-0.030883789,-0.017028809,-0.018692017,0.0110321045,-0.016204834,-0.014030457,0.007575989,0.007003784,0.0206604,-0.0018863678,0.0068473816,-0.0068511963,0.029006958,-0.020187378,0.020645142,-0.015686035,-0.013282776,0.03540039,-0.0395813,0.028015137,0.004173279,-0.0075531006,0.007713318,0.040374756,0.044799805,-0.037353516,-0.010253906,0.01209259,0.003993988,0.036834717,-0.020614624,0.04788208,0.013839722,-0.01663208,0.018432617,-0.011871338,-0.011741638,-0.019683838,-0.02381897,0.024551392,0.0007753372,0.01638794,-0.025039673,0.0045433044,0.013877869,0.008117676,0.008110046,-0.008728027,-0.023010254,-0.034362793,-0.0013313293,0.0053634644,0.0028018951,-0.0027217865,0.025314331,0.021148682,0.041107178,0.016403198,-0.024429321,-0.00003618002,0.025878906,-0.01285553,-0.00079774857,0.028533936,0.0052375793,0.008926392,0.021774292,0.018112183,-0.05633545,-0.01473999,-0.022537231,-0.014503479,-0.0036754608,-0.0025596619,-0.020248413,-0.009132385,0.0015897751,-0.009002686,-0.026321411,0.0019445419,-0.025634766,-0.03274536,0.0027198792,-0.019104004,0.026885986,0.0045661926,0.013061523,0.01109314,-0.0054130554,0.03756714,0.002981186,-0.017684937,0.038330078,0.040252686,0.021057129,-0.02798462,-0.00605011,-0.01838684,-0.013473511,-0.003944397,-0.03829956,0.018493652,0.040527344,-0.019821167,0.005138397,0.0035629272,0.021743774,-0.0044822693,0.007949829,-0.0079574585,0.019851685,-0.0077590942,0.034057617,-0.050689697,0.021636963,0.008148193,0.00484848,-0.01360321,-0.014503479,-0.033355713,0.017181396,0.003129959,-0.006500244,0.04849243,0.013076782,0.036895752,-0.020904541,-0.018539429,0.007575989,-0.031402588,-0.02746582,0.022567749,-0.013572693,-0.004627228,0.022354126,-0.025100708,0.031707764,-0.03189087,0.013839722,0.0013971329,-0.0012950897,-0.01171875,-0.013320923,-0.010055542,-0.00945282,-0.01600647,0.0032901764,-0.007446289,0.046020508,0.015350342,0.038208008,0.04309082,0.023483276,0.007434845,-0.03479004,-0.031555176,0.0068206787,-0.01776123,0.018203735,-0.01701355,0.04977417,0.032562256,-0.0057907104,0.03945923,0.027145386,0.035125732,-0.00080156326,0.009628296,-0.016983032,0.017822266,-0.010528564,0.020065308,-0.0035858154,0.041046143,-0.026885986,0.02368164,0.012535095,0.013114929,-0.02520752,0.036590576,0.07183838,0.01713562,-0.0076560974,0.035858154,-0.0038928986,-0.01235199,-0.004875183,-0.023880005,0.051757812,0.011955261,0.044067383,0.056121826,0.013038635,-0.004337311,0.029708862,-0.02835083,-0.0256958,0.059509277,0.020050049,-0.022460938,-0.0043296814,-0.0036258698,0.0068130493,-0.048706055,-0.024902344,0.02204895,-0.012794495,0.00737381,0.00024700165,-0.00774765,-0.012084961,0.01235199,0.018081665,0.019546509,-0.008796692,0.0256958,0.036346436,-0.0028266907,0.020736694,0.001455307,0.02079773,-0.016998291,-0.022018433,0.019515991,0.022979736,-0.012214661,-0.014152527,0.029891968,0.0018539429,0.042388916,0.043914795,-0.02230835,0.0041885376,0.02746582,0.01146698,-0.0038051605,0.054473877,0.036376953,0.021850586,0.042236328,0.030929565,0.037384033,-0.041503906,0.01939392,-0.0036582947,-0.0020828247,-0.01399231,0.00060749054,0.004436493,-0.01235199,0.02861023,0.0019779205,-0.01537323,0.017028809,0.023010254,-0.0040359497,-0.011146545,-0.010765076,0.0048065186,-0.0309906,0.00033783913,0.011451721,-0.018753052,0.035339355,0.017654419,0.019073486,-0.025482178,0.023620605,0.00072288513,-0.012512207,-0.0037460327,0.029418945,-0.041290283,0.0039367676,-0.0098724365,0.0011196136,-0.055358887,0.0079574585,0.023605347,-0.014160156,0.019134521,0.013282776,0.002374649,-0.009857178,0.02458191,0.0084991455,0.0019931793,-0.017990112,-0.021972656,0.028274536,0.0446167,0.0082473755,0.003068924,-0.022506714,-0.006298065,0.006904602,-0.0049476624,-0.0024471283,-0.012138367,-0.010948181,-0.018341064,0.022064209,0.038330078,0.022628784,0.053253174,-0.0143966675,-0.010734558,0.017288208,0.037841797,-0.0006761551,-0.00806427,-0.0010900497,0.02470398,-0.016403198,0.044403076,0.04788208,0.00415802,0.036895752,-0.001871109,-0.020599365,0.0056610107,-0.008918762,0.027648926,-0.009223938,0.0035991669,-0.0010080338,0.034332275,-0.016036987,-0.030914307,-0.00003349781,-0.023269653,-0.018432617,-0.016403198,0.011245728,0.0026435852,0.029006958,0.041046143,0.029937744,-0.016403198,0.059631348,-0.015686035,0.04373169,-0.000026226044,-0.0064353943,0.05090332,0.022125244,0.038208008,0.011802673,0.017471313,-0.032196045,0.022781372,0.029891968,0.023620605,0.010139465,0.006465912,-0.0048561096,0.03643799,-0.00029850006,0.037475586,-0.0065231323,0.0028686523,0.017959595,-0.00089263916,-0.0029315948,-0.0053520203,-0.0024738312,0.0102005005,0.0501709,-0.030853271,-0.003742218,-0.025283813,-0.015510559,0.022857666,-0.011680603,0.00041222572,-0.012496948,-0.022232056,0.00869751,-0.03237915,-0.018554688,0.013214111,0.028793335,-0.049621582,-0.011070251,0.011314392,0.017242432,-0.020874023,0.02658081,0.025268555,0.002462387,0.0061836243,0.04849243,-0.012016296,0.032409668,-0.011756897,0.030883789,0.02897644,0.013015747,-0.01689148,0.0039367676,0.007419586,-0.011703491,0.013420105,0.033111572,-0.025756836,0.0024299622,-0.008682251,-0.012077332,-0.00006365776,0.010147095,-0.0099105835,0.0036392212,-0.0052986145,-0.0104522705,0.012641907,0.006931305,-0.006958008,0.0022907257,0.0024318695,-0.01638794,0.016067505,0.030700684,0.018844604,-0.028411865,-0.009132385,0.002325058,0.005542755,-0.01737976,-0.011421204,-0.0057029724,-0.03869629,0.007499695,0.007381439,0.00920105,0.009605408,-0.027572632,-0.005458832,0.027908325,0.0035057068,0.008735657,0.005256653,0.0014333725,0.016433716,-0.0035076141,-0.004020691,-0.0073547363,-0.0037651062,0.01928711,0.022125244,-0.014266968,-0.03378296,0.020751953,-0.005554199,0.0135650635,0.0078048706,-0.009590149,0.01763916,-0.01739502,-0.0032234192,0.000087201595,0.019470215,-0.011039734,-0.008979797,-0.009643555,0.024795532,0.049682617,-0.0055122375,-0.007232666,0.023345947,0.018432617,0.0178833,0.03857422,0.0029182434,0.039642334,0.029937744,-0.015197754,-0.015625,0.02609253,-0.0061836243,-0.025772095,0.015823364,-0.008026123,-0.010810852,0.02407837,0.01838684,0.003873825,-0.040740967,-0.0058784485,-0.007167816,-0.016326904,0.011672974,-0.016571045,0.016571045,-0.02746582,-0.015991211,0.003944397,-0.03387451,-0.03894043,-0.022003174,0.002817154,-0.008926392,-0.05050659,-0.0004079342,-0.032592773,0.0057907104,-0.017745972,-0.005218506,-0.0062294006,0.019989014,-0.014518738,-0.015777588,-0.0065193176,0.025787354,0.021987915,0.013420105,0.031555176,-0.02684021,-0.02482605,-0.034362793,0.005592346,-0.014381409,0.02330017,0.0030899048,0.026947021,0.028503418,-0.01802063,-0.0021781921,-0.0064697266,-0.007232666,-0.019683838,-0.01612854,-0.023361206,0.021835327,0.012786865,-0.008148193,-0.0061683655,0.042053223,-0.030883789,-0.012969971,0.0309906,0.039031982,0.0015869141,0.03048706,-0.018676758,-0.0003080368,-0.013587952,0.0039024353,-0.015586853,0.004573822,0.010635376,0.0077934265,0.0062294006,0.0068588257,0.030258179,-0.013793945,0.008621216,0.031204224,0.0047187805,-0.005722046,0.0385437,0.006175995,0.0036411285,-0.016159058,-0.0078048706,0.024597168,0.036010742,0.01737976,0.0066108704,-0.018600464,0.00055742264,-0.017456055,0.017532349,0.02319336,-0.017990112,-0.04586792,-0.018173218,-0.03677368,0.022216797,0.00023901463,0.011199951,-0.00674057,0.017837524,-0.025482178,-0.02178955,-0.020996094,0.034820557,0.020324707,-0.015274048,-0.0132369995,0.0061950684,0.022384644,-0.03753662,-0.0033512115,-0.05142212,-0.034454346,-0.010536194,-0.014411926,0.025360107,0.008277893,-0.007835388,-0.0039100647,-0.0046539307,-0.0043411255,0.0008111,0.015113831,-0.020721436,-0.0044174194,0.022216797,0.020980835,-0.018554688,0.028930664,-0.011550903,0.011047363,0.00806427,-0.012535095,0.019165039,-0.021652222,0.029312134,-0.0061950684,0.000746727,0.03387451,-0.006793976,0.008735657,-0.03567505,-0.007041931,0.0032348633,-0.0071525574,0.046173096,-0.01751709,-0.022445679,0.010795593,-0.021514893,-0.02659607,0.0033779144,0.019363403,0.025482178,-0.005542755,0.051361084,-0.0062217712,-0.0143966675,0.018920898,0.008895874,-0.02003479,0.00034236908,0.03237915,0.0029621124,0.0035629272,-0.003818512,-0.010093689,-0.031829834,-0.0055732727,0.012489319,-0.004032135,-0.014778137,0.031173706,0.017440796,0.04586792,-0.010421753,0.027236938,0.00844574,0.0072250366,0.02986145,0.00076675415,0.047790527,-0.011207581,-0.023635864,0.0038433075,-0.00034165382,-0.02494812,0.014228821,-0.005619049,0.003768921,-0.039001465,0.015014648,0.0012636185,0.02470398,-0.019821167,0.011054993,-0.025970459,-0.011268616,-0.031066895,-0.008369446,-0.02911377,0.010368347,0.030654907,0.0018110275,0.033691406,-0.0035705566,-0.02848816,0.016036987,0.04260254,-0.002128601,-0.02822876,-0.018356323,0.012916565,0.0046157837,0.009384155,0.00983429,-0.015602112,-0.017288208,-0.0040740967,-0.009536743,0.007499695,-0.007904053,0.01789856,0.0105896,-0.004257202,-0.0066108704,0.033325195,-0.0040740967,-0.0066490173,0.008964539,0.0031776428,0.032562256,0.034179688,-0.016937256,0.016448975,0.01386261,-0.047576904,0.06628418,-0.0041160583,0.02381897,-0.010635376,0.009521484,-0.030578613,-0.029785156,-0.024291992,0.005859375],"createdAt":"2026-04-18T18:59:22.256Z","updatedAt":"2026-04-22T13:31:47.692Z","lastSeenAt":"2026-04-22T13:31:47.692Z","tsv":"'/api/v1/transactions/207':94 '/request':13,28 '/transactions/207':226 '0.02':12,27,62,121,175 '000':110 '0x8335':115 '20':109 '2913':116 '300':134 '402':104 '6':125 'Base network API' 'USDC micropayment API' 'accept':139 'access':100,235 'account':74 'across':45 'actual':221 'advertis':148 'ai/ml':48 'analysi':152 'analyt':47 'api':5,20,37,72,99,185,234 'application/json':144 'attach':82 'avail':215 'base':8,23,69,111,118 'base-network' 'behind':223 'beyond':230 'broader':146 'call':4,19 'caller':80 'challeng':105 'classif':155 'connect':194 'content':219 'convers':167 'crawl':218 'crypto-paid API' 'data':46,169 'decim':126 'detail':201 'doc':184 'document':179,210 'embed':156 'enabl':36 'endpoint':44,55,92,138,149,227 'equal':120 'estim':164 'exact':131 'exampl':214 'exchang':159 'extrem':181 'feed':158 'finance/web3':50 'function':222 'gas':163 'generat':170 'generic':232 'geocod':165 'given':122 'header':86 'howev':178 'infer':49 'infrastructur':52 'json-response' 'key':73 'label':236 'limit':77 'list':96 'lowpaymentfee' 'lowpaymentfee.com':31 'network':9,24,70 'no-api-key' 'offer':40 'openapi':205 'page':189 'pay':2,17,58 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':57 'payment':85,128 'per':3,18,59 'platform':6,21,38,147 'point':177 'post':140 'post-method' 'premium':98,233 'price':157,176,186 'prompt':196 'quot':162 'rate':76,160 'readm':188 'render':191 'request':60,89,106,141 'request/response':208 'requir':79 'return':102,143 'schema':209 'scheme':129 'second':135 'sentiment':151 'serverless API payment' 'settl':64 'simpli':81 'spars':182 'spec':206 'specif':91,225 'summar':154 'technic':200 'text':153 'timeout':136 'token':161 'unclear':229 'unit':112 'usag':213 'usdc':15,30,66,114,123 'usdc-settlement' 'util':53 'valid':166 'varieti':42 'via':10,25 'wallet':195 'x402':11,26,35,84 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"7dfa70c2-8b24-4ccb-9c5e-8e879c6a47fb","listingId":"67881266-0b57-48bc-8252-21b03052381d","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/transactions/207","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:59:22.256Z"}],"sources":[{"listingId":"67881266-0b57-48bc-8252-21b03052381d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/207","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:22.256Z","lastSeenAt":"2026-04-22T13:31:47.692Z"}],"details":{"listingId":"67881266-0b57-48bc-8252-21b03052381d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/207 \\\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":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, scheme exact, 300s timeout","source_url":"https://lowpaymentfee.com/api/v1/transactions/207"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing pay-per-use API endpoints without account registration","Making micropayment-gated API calls settled on Base in USDC","Agent-driven API consumption with x402 payment protocol"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who want bulk pricing or subscription discounts","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.478Z"},"updatedAt":"2026-04-22T13:31:47.692Z"}}