{"id":"9dbff758-1fbb-4904-8df6-b99db302041d","shortId":"DJUBQQ","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transfers/44` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02 per request price point.\n\nThis particular endpoint (`/api/v1/transfers/44`) is labeled \"Premium API Access\" but its actual functionality is not documented beyond that label. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional content. Without further documentation or example responses, the exact data returned by this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The exact functionality of /api/v1/transfers/44 ('Premium API Access') is not documented anywhere in the crawled material.","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no substantive content.","No OpenAPI spec, no request/response schemas, and no usage examples are available.","The endpoint name 'transfers/44' suggests a resource-specific path but its purpose is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/44","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/transfers/44","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 network. However, there is no OpenAPI schema, no documentation beyond a landing page listing, no example requests or responses, and the actual functionality of /api/v1/transfers/44 is undocumented. The docs/pricing/README pages are all empty stubs.","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":"2026-04-19T14:20:17.567Z","embedding":[-0.024093628,-0.034973145,0.0440979,0.029953003,0.00945282,-0.027832031,-0.025924683,0.03616333,0.06695557,-0.07165527,0.03253174,-0.034332275,-0.03024292,-0.028182983,-0.022842407,0.0079193115,0.0017776489,0.0011787415,-0.030776978,0.03173828,0.026260376,-0.02053833,-0.03201294,0.019714355,0.009140015,-0.024749756,-0.011543274,-0.022506714,-0.012611389,-0.026763916,0.025756836,-0.030578613,-0.0009698868,0.012588501,-0.012367249,-0.014274597,0.00026369095,0.0418396,0.013290405,-0.005554199,0.004501343,-0.05984497,-0.0036182404,-0.022918701,-0.0569458,-0.0050735474,-0.007171631,-0.031066895,0.0029411316,0.004875183,-0.027877808,-0.00522995,-0.023742676,0.012756348,0.016586304,0.015457153,0.0060539246,-0.0041999817,0.00919342,0.013420105,-0.011146545,-0.0574646,-0.020431519,-0.0063972473,0.012931824,0.058258057,-0.023269653,0.04724121,0.014770508,0.07055664,0.035614014,0.05230713,0.031204224,0.016433716,-0.00011843443,0.002735138,-0.010101318,0.052947998,-0.009353638,-0.023483276,-0.006378174,-0.015533447,-0.05203247,0.011077881,-0.0149002075,-0.03564453,-0.02418518,0.017715454,-0.0024414062,0.020568848,-0.06762695,-0.0046195984,-0.005004883,0.002046585,-0.003993988,-0.009880066,-0.005508423,0.020401001,-0.017303467,0.015853882,-0.0053634644,-0.04083252,0.01977539,0.01020813,0.035369873,0.032287598,0.017486572,0.022598267,0.0039024353,-0.005519867,-0.015853882,0.018630981,-0.012680054,-0.004840851,0.022003174,-0.0031776428,-0.0049324036,0.007637024,-0.0287323,0.03024292,-0.060943604,0.03869629,0.016174316,-0.00093507767,0.000042557716,-0.04260254,-0.0047683716,0.015159607,-0.019348145,-0.012382507,0.024383545,0.0065078735,0.030136108,-0.017974854,-0.02909851,0.012557983,-0.02104187,-0.00932312,-0.04977417,-0.039794922,0.04058838,-0.036010742,0.015563965,0.037200928,-0.10192871,-0.009788513,-0.034210205,0.018981934,-0.031341553,-0.00020587444,-0.008956909,0.019607544,-0.015083313,-0.013328552,-0.022262573,-0.020736694,0.008903503,0.026916504,-0.017669678,0.054870605,-0.021606445,0.017242432,0.010810852,0.0017166138,0.022155762,0.0234375,-0.00315094,-0.078308105,-0.0881958,-0.005859375,-0.004890442,-0.018508911,-0.037200928,0.011497498,-0.0033912659,-0.07867432,-0.014266968,-0.033233643,-0.0060577393,-0.040496826,0.0024051666,-0.036468506,0.02809143,-0.006793976,-0.06738281,-0.015655518,-0.019805908,0.058441162,0.030776978,0.027648926,0.030258179,-0.017166138,0.056121826,0.019699097,-0.031097412,-0.019851685,0.023971558,-0.017700195,0.009765625,-0.010398865,0.015731812,-0.029541016,0.035125732,0.068115234,-0.0011949539,-0.02482605,-0.004322052,-0.06213379,-0.043182373,-0.028945923,0.01727295,0.017349243,-0.0010786057,0.041229248,-0.05105591,-0.037384033,0.01109314,0.020126343,0.015991211,0.062805176,0.009765625,-0.0178833,0.029846191,0.018753052,-0.052947998,0.036010742,0.042144775,0.014221191,-0.03842163,-0.025802612,0.035339355,0.03729248,-0.026000977,0.005405426,-0.008140564,0.028427124,-0.013313293,0.0035991669,0.01146698,-0.017654419,-0.028182983,-0.024841309,-0.019607544,0.024398804,0.0019607544,-0.029312134,-0.030166626,-0.087402344,0.056274414,0.04043579,0.043640137,-0.0062179565,-0.0017213821,-0.021255493,-0.013305664,-0.055603027,0.061523438,0.07092285,0.0020561218,-0.014221191,0.027252197,-0.01965332,-0.044036865,0.012619019,-0.005771637,-0.027572632,-0.009727478,0.014289856,-0.045532227,0.006248474,0.020950317,0.022766113,0.050689697,-0.006969452,-0.05480957,-0.02507019,-0.0035076141,-0.0001244545,-0.024414062,0.0054359436,-0.010299683,0.011604309,0.0077590942,0.0073013306,0.010810852,-0.013786316,-0.0024414062,0.010505676,0.009262085,-0.01600647,-0.037872314,0.012588501,0.008018494,-0.048217773,0.0031089783,-0.0056762695,0.06903076,-0.048858643,0.03768921,-0.0057868958,0.0022888184,0.057250977,0.004322052,-0.045928955,0.008888245,0.017486572,0.009635925,0.05014038,0.012283325,-0.037902832,-0.012245178,0.08270264,-0.012710571,-0.005405426,0.009941101,0.026107788,0.031219482,-0.007858276,-0.05621338,-0.02633667,-0.0032196045,-0.04498291,0.024337769,-0.020462036,0.031555176,-0.0065307617,-0.00092458725,-0.029846191,0.0018444061,-0.025924683,0.006526947,-0.010025024,0.0017471313,-0.018753052,-0.0107803345,0.020507812,-0.0014095306,-0.018341064,0.0033550262,0.04168701,0.02671814,-0.0025196075,-0.028427124,-0.024520874,-0.005218506,0.0012674332,0.026550293,0.021957397,0.02545166,0.05105591,-0.038970947,0.0038604736,0.022338867,0.02684021,0.024368286,-0.010879517,0.0077400208,-0.06903076,-0.061035156,-0.022003174,-0.045928955,0.045654297,0.020767212,-0.005138397,0.05053711,0.016098022,-0.021392822,-0.03842163,0.019836426,-0.049438477,-0.0013790131,0.047302246,-0.026062012,-0.02154541,0.011764526,-0.002532959,0.007949829,0.030776978,0.01676941,0.039611816,0.07574463,0.05343628,0.0033493042,0.031066895,-0.0050811768,0.026138306,0.009162903,-0.026947021,-0.03173828,-0.016143799,0.034454346,-0.024108887,-0.012710571,-0.07244873,0.043060303,0.043792725,0.0982666,0.022842407,0.0027389526,0.02835083,-0.01725769,0.018966675,-0.029663086,-0.020263672,-0.022659302,-0.04272461,0.024337769,-0.014289856,-0.007286072,-0.02545166,0.043914795,-0.0034885406,0.029251099,-0.031402588,0.05178833,-0.005592346,-0.026870728,0.016815186,0.0045700073,0.040496826,0.06762695,-0.042388916,0.02456665,0.023956299,-0.015609741,-0.0026073456,0.03250122,-0.00982666,-0.0020637512,-0.059906006,-0.030517578,-0.02267456,-0.002368927,-0.047027588,0.016647339,0.016220093,0.021987915,0.028320312,-0.010169983,-0.012046814,-0.0109939575,-0.01499939,-0.05117798,-0.00014412403,-0.03765869,-0.0035552979,0.048736572,-0.028945923,-0.010513306,0.008171082,-0.0065956116,-0.0066566467,-0.003414154,0.02558899,-0.006160736,-0.04220581,0.016571045,0.0018119812,0.016784668,0.0064888,0.028244019,0.012367249,0.0385437,0.04360962,0.024642944,-0.011764526,-0.06817627,0.012466431,-0.041870117,-0.0020160675,0.020233154,-0.021835327,-0.0019025803,-0.010566711,-0.030960083,-0.024993896,0.015533447,-0.03265381,-0.0035877228,0.014976501,-0.014289856,-0.02909851,-0.052734375,-0.022766113,-0.005832672,0.061828613,0.024993896,0.023605347,-0.0715332,-0.008148193,0.031097412,0.011024475,0.03363037,-0.014419556,-0.0012054443,-0.013626099,-0.02609253,-0.01134491,-0.022583008,0.027145386,-0.0037708282,-0.0011892319,0.013877869,0.006427765,0.027145386,0.0013666153,0.0181427,0.036193848,-0.032684326,-0.008010864,-0.0008111,0.03262329,0.014183044,-0.012031555,-0.05819702,0.038757324,0.02168274,0.031463623,-0.046691895,-0.008087158,-0.011383057,0.015083313,0.010955811,-0.007949829,-0.0054244995,-0.005706787,-0.04824829,-0.054504395,0.05706787,-0.025604248,0.027618408,0.026031494,0.0064315796,0.016098022,-0.008995056,-0.01928711,0.013381958,-0.01991272,-0.007545471,-0.019256592,-0.028366089,-0.023605347,-0.011230469,-0.024459839,0.025253296,-0.01876831,0.0154800415,0.0029907227,-0.023620605,0.015052795,-0.008842468,-0.007675171,0.01927185,0.002565384,0.02470398,0.035125732,0.006614685,-0.04196167,0.014213562,-0.010848999,0.009643555,0.00019061565,0.04034424,0.026229858,-0.00047373772,0.011154175,-0.008552551,-0.01751709,-0.013717651,-0.006652832,0.013031006,0.009773254,-0.006275177,-0.03756714,0.010185242,0.007965088,-0.03125,-0.02810669,0.014717102,0.013244629,-0.030685425,0.025344849,0.035705566,0.04284668,-0.018081665,-0.004283905,0.00004428625,0.02217102,0.03149414,0.01739502,-0.0134887695,0.018005371,-0.014213562,0.022018433,-0.0036697388,-0.010726929,0.021484375,0.0068092346,0.021362305,0.022094727,0.007118225,-0.028015137,-0.03842163,-0.00075387955,-0.0107040405,-0.03137207,0.023895264,0.016021729,0.029586792,-0.029129028,0.014587402,0.00881958,-0.027648926,-0.009109497,-0.020935059,0.045837402,-0.019989014,-0.015571594,0.014823914,0.018173218,0.029922485,-0.051971436,-0.00019145012,-0.0060157776,0.013015747,-0.0236969,-0.038848877,-0.029846191,0.0058517456,0.030761719,0.010292053,0.021484375,0.033966064,-0.0017747879,0.009307861,0.027023315,-0.0030097961,-0.009773254,-0.016571045,-0.036712646,-0.014312744,-0.008087158,0.0008158684,-0.026992798,0.009735107,0.0019512177,-0.022964478,0.006210327,-0.008857727,-0.002122879,-0.013008118,0.0036182404,0.037902832,0.00059366226,0.016479492,-0.010444641,-0.043518066,0.006095886,-0.0020618439,0.011199951,-0.046142578,0.0124053955,-0.019638062,-0.0038089752,0.008102417,0.015586853,0.023849487,0.020584106,0.009712219,0.033935547,-0.047180176,0.042175293,-0.029846191,0.009567261,-0.007522583,-0.04260254,-0.014350891,-0.018325806,-0.015182495,0.038757324,-0.03375244,-0.010536194,-0.026870728,-0.028945923,-0.009613037,-0.051086426,0.01184845,0.03717041,0.033813477,-0.028244019,-0.0026054382,0.00070524216,0.0073127747,-0.018035889,0.0072746277,-0.015701294,0.020935059,0.021881104,0.005592346,-0.042633057,-0.027053833,-0.024642944,-0.01889038,-0.0395813,-0.051849365,-0.022354126,0.004585266,-0.009544373,-0.0049476624,-0.01727295,-0.028427124,0.0002734661,-0.04473877,0.0014896393,0.01108551,0.024993896,0.003250122,-0.03466797,0.0029449463,0.015350342,-0.014007568,0.041259766,0.010009766,-0.0006432533,-0.0418396,0.009414673,0.011604309,0.030944824,-0.0041542053,-0.016464233,-0.0047569275,-0.014602661,-0.065979004,-0.009353638,-0.003501892,-0.013656616,-0.0017375946,-0.00072717667,-0.05114746,-0.0037441254,-0.01600647,0.002746582,0.028213501,0.005630493,0.01499939,0.0026016235,0.014251709,-0.0076293945,-0.0039520264,-0.028625488,0.008056641,0.010353088,-0.00035214424,0.027496338,0.058441162,0.003932953,-0.024993896,0.0071754456,0.0047798157,0.01499939,-0.028793335,0.0085372925,-0.009750366,0.013694763,-0.009437561,-0.014755249,-0.03656006,-0.0037708282,0.08215332,-0.008125305,-0.017227173,-0.012298584,-0.021575928,0.013000488,0.03451538,-0.041778564,-0.006259918,-0.017822266,0.01676941,-0.027130127,0.011367798,0.004760742,0.018829346,-0.015144348,-0.05529785,-0.023223877,-0.009231567,-0.015403748,-0.053741455,-0.02645874,-0.066467285,-0.001373291,-0.0099105835,-0.022521973,0.0039253235,0.018325806,-0.022491455,-0.08093262,0.00080251694,0.057403564,0.008911133,0.025299072,-0.009979248,0.023834229,0.033599854,-0.035949707,-0.0037288666,0.026062012,-0.029052734,-0.019454956,-0.020111084,0.02407837,-0.0099105835,-0.013587952,0.016525269,0.016662598,0.01689148,-0.015258789,0.0003592968,-0.014137268,0.02772522,-0.022155762,0.021194458,-0.014823914,-0.0132369995,0.033935547,-0.046905518,0.0236969,0.016998291,-0.0090789795,0.0012254715,0.03314209,0.035064697,-0.039154053,-0.019134521,0.01876831,0.012161255,0.030731201,-0.0236969,0.043395996,0.015289307,-0.02381897,0.020874023,-0.010513306,-0.021133423,-0.018737793,-0.030685425,0.026382446,-0.0129470825,0.01576233,-0.021697998,0.008140564,0.011413574,0.014053345,0.011245728,-0.0065307617,-0.017288208,-0.013900757,-0.0030879974,0.007522583,0.003107071,-0.0065612793,0.025299072,0.025131226,0.03845215,0.017700195,-0.022842407,0.0007996559,0.034057617,-0.011947632,0.0013990402,0.016159058,0.0048713684,0.02243042,0.020065308,0.016860962,-0.046844482,-0.016235352,-0.0076904297,-0.020401001,0.00010788441,0.0003311634,-0.01600647,-0.011672974,0.008857727,-0.002796173,-0.026489258,0.0032520294,-0.02545166,-0.026443481,-0.0009613037,-0.022491455,0.020050049,0.0023517609,0.0118255615,0.0034332275,-0.0038909912,0.034851074,-0.006046295,-0.018676758,0.022247314,0.030944824,0.019592285,-0.03564453,-0.007396698,-0.010719299,-0.021591187,-0.010177612,-0.03375244,-0.0010204315,0.041656494,-0.017105103,-0.0014915466,0.006290436,0.02861023,-0.0026607513,0.0016212463,-0.006801605,0.022994995,-0.009590149,0.03668213,-0.033416748,0.022872925,0.003660202,0.005001068,-0.013420105,-0.014831543,-0.03439331,0.02079773,0.011810303,-0.018173218,0.047912598,0.013183594,0.029129028,-0.02128601,-0.017944336,0.008308411,-0.028320312,-0.018463135,0.029907227,-0.0063591003,0.0033035278,0.010528564,-0.02658081,0.041503906,-0.031219482,0.018753052,0.0056152344,0.0072402954,-0.00843811,-0.02519226,-0.0039596558,-0.0076942444,-0.01701355,0.013923645,0.007209778,0.048583984,0.017745972,0.029220581,0.050109863,0.02130127,-0.0054473877,-0.03173828,-0.023239136,0.016571045,-0.020019531,0.020996094,-0.011329651,0.058654785,0.037322998,0.00447464,0.03781128,0.028579712,0.027511597,0.009170532,0.011650085,-0.018096924,0.013626099,0.0025310516,0.03338623,-0.0022602081,0.03149414,-0.027664185,0.02507019,0.0059814453,0.026657104,-0.036010742,0.03768921,0.07147217,0.018478394,-0.014862061,0.039093018,-0.010932922,-0.0134887695,-0.012779236,-0.02407837,0.05441284,0.00057315826,0.04864502,0.047851562,0.01612854,-0.006011963,0.029571533,-0.0209198,-0.02508545,0.0657959,0.03479004,-0.013961792,-0.010948181,-0.001367569,0.018249512,-0.04663086,-0.038360596,0.018157959,-0.007972717,0.007820129,0.0004644394,-0.013305664,-0.0068855286,0.022918701,0.022644043,0.010696411,-0.009643555,0.03225708,0.03704834,-0.0013389587,0.027282715,-0.0038700104,0.026138306,-0.027145386,-0.021102905,0.015792847,0.024917603,-0.0055236816,-0.010551453,0.02835083,-0.00048017502,0.03717041,0.04586792,-0.02545166,0.012458801,0.039215088,0.008132935,-0.0022716522,0.05255127,0.047668457,0.016448975,0.040649414,0.021255493,0.02355957,-0.041534424,0.021377563,-0.002002716,0.0020008087,-0.0009531975,-0.01146698,0.005088806,-0.018066406,0.011146545,0.01600647,-0.013084412,0.0335083,0.03189087,-0.0023593903,-0.0064353943,-0.00008755922,0.019241333,-0.023010254,-0.0031642914,0.006412506,-0.015945435,0.043701172,0.01108551,0.03302002,-0.01184082,0.011291504,-0.0005145073,-0.017333984,-0.0016031265,0.023452759,-0.029541016,0.003255844,-0.0035362244,0.006755829,-0.053009033,0.012107849,0.030883789,-0.022125244,0.03262329,0.006210327,-0.003255844,-0.00920105,0.02557373,0.012756348,-0.004798889,-0.0181427,-0.025131226,0.033935547,0.04812622,-0.0007543564,0.0061149597,-0.024368286,-0.0037631989,0.013702393,-0.00020301342,0.0026779175,-0.012062073,-0.025741577,-0.031036377,0.028244019,0.041870117,0.024383545,0.055541992,-0.027069092,-0.00762558,-0.00096845627,0.04324341,0.003835678,-0.009727478,-0.0008354187,0.016708374,-0.020553589,0.047790527,0.027511597,0.012458801,0.03274536,-0.0067443848,-0.024993896,0.012451172,-0.011352539,0.01675415,-0.02015686,-0.0038414001,-0.0045547485,0.024490356,-0.013442993,-0.03540039,0.021057129,-0.013442993,-0.018600464,-0.0058174133,0.015144348,0.013885498,0.025253296,0.03149414,0.018722534,-0.020385742,0.06384277,-0.005405426,0.043670654,0.0039024353,-0.014831543,0.048675537,0.010772705,0.03274536,0.01689148,0.023590088,-0.034851074,0.024673462,0.032592773,0.015304565,0.011978149,0.005355835,-0.011627197,0.034423828,0.004459381,0.024749756,-0.014030457,-0.005558014,0.015823364,-0.00026607513,-0.0023536682,-0.010643005,-0.014701843,0.000954628,0.05670166,-0.028427124,-0.014862061,-0.020843506,-0.008865356,0.023132324,-0.020843506,0.007320404,-0.003698349,-0.01777649,0.01991272,-0.022735596,-0.032348633,0.0070343018,0.02633667,-0.038513184,-0.024017334,0.0036964417,0.021438599,-0.027832031,0.025543213,0.017349243,0.00069475174,0.0033683777,0.04147339,-0.005554199,0.029830933,-0.0101623535,0.028427124,0.03149414,-0.0022201538,-0.020233154,-0.0006580353,0.0060272217,-0.017822266,0.008628845,0.03930664,-0.010986328,-0.00044369698,-0.013381958,-0.0055351257,-0.00289917,0.008010864,-0.011161804,0.011764526,-0.020950317,-0.008804321,-0.00605011,0.012382507,0.0011816025,-0.005710602,-0.01033783,-0.011016846,0.008460999,0.031799316,0.015945435,-0.035827637,-0.010047913,0.0004925728,0.019241333,-0.023010254,-0.012260437,-0.002161026,-0.038269043,0.013313293,0.006252289,0.018127441,0.017410278,-0.020690918,0.0022354126,0.02835083,0.023071289,0.019134521,0.0026950836,0.002248764,0.021255493,0.0014562607,-0.0056266785,0.0015163422,-0.009719849,0.0131073,0.02532959,-0.009864807,-0.03378296,0.025726318,-0.008056641,0.0115356445,0.0033130646,-0.017959595,0.014419556,-0.013435364,0.005783081,-0.00077295303,0.011238098,-0.006996155,-0.008804321,-0.013420105,0.035827637,0.057250977,-0.018722534,-0.00093603134,0.029205322,0.020355225,0.015510559,0.042541504,0.0063323975,0.046783447,0.024719238,-0.022979736,-0.02909851,0.03353882,-0.0077590942,-0.02407837,0.009887695,-0.0049743652,-0.016525269,0.025360107,0.012054443,-0.00022423267,-0.030319214,-0.02017212,-0.020248413,-0.0071258545,0.010551453,-0.02015686,0.0066452026,-0.018463135,-0.0134887695,0.0076522827,-0.03378296,-0.04663086,-0.017974854,0.002632141,-0.010238647,-0.053619385,0.018859863,-0.03527832,0.005584717,-0.036346436,-0.001411438,-0.013885498,0.024871826,-0.0234375,-0.002336502,0.009033203,0.027023315,0.014625549,0.009643555,0.020843506,-0.026062012,-0.034423828,-0.025756836,0.015777588,-0.00957489,0.013587952,0.01184845,0.026550293,0.030578613,-0.009376526,-0.0070991516,-0.01309967,-0.0045166016,-0.01727295,-0.019119263,-0.027328491,0.028274536,0.014419556,-0.0141067505,-0.010383606,0.047576904,-0.02154541,-0.018600464,0.029464722,0.046722412,0.005405426,0.029403687,-0.02041626,-0.0073280334,-0.016403198,-0.00919342,-0.009994507,0.007850647,0.0073127747,0.007007599,-0.01209259,-0.0025348663,0.02229309,-0.019882202,-0.006538391,0.028289795,-0.0048713684,-0.008834839,0.036254883,0.013183594,0.0014791489,-0.018859863,-0.011383057,0.031402588,0.046539307,0.017150879,0.006286621,-0.00844574,0.004386902,-0.018814087,0.008422852,0.014602661,-0.02571106,-0.039733887,-0.027236938,-0.024520874,0.018554688,-0.0023918152,0.011360168,-0.0076179504,0.022109985,-0.012489319,-0.017303467,-0.026885986,0.031143188,0.0053520203,-0.010681152,-0.007183075,0.013031006,0.0015802383,-0.034332275,-0.00035238266,-0.043884277,-0.0357666,-0.0020427704,-0.023666382,0.028015137,0.014526367,-0.00059366226,-0.014350891,-0.0027198792,-0.00579834,0.008255005,0.030548096,-0.024642944,-0.00039720535,0.037719727,0.0149383545,-0.022125244,0.024917603,-0.020339966,-0.0032367706,0.012756348,-0.004348755,0.008216858,-0.023284912,0.031341553,-0.011398315,-0.0025405884,0.028869629,-0.00869751,0.004283905,-0.034606934,0.015533447,-0.0016536713,0.002500534,0.032165527,-0.025115967,-0.021072388,0.004196167,-0.020446777,-0.028869629,0.0016565323,0.021560669,0.03604126,-0.0076293945,0.040771484,-0.015914917,-0.0013093948,0.021713257,0.009010315,-0.014305115,0.004436493,0.034210205,-0.0014753342,0.0023517609,-0.008605957,-0.014793396,-0.026885986,0.0012254715,0.009483337,-0.008178711,-0.009643555,0.028030396,0.02029419,0.0418396,0.002664566,0.023498535,0.004032135,0.005870819,0.026245117,0.0061187744,0.055755615,-0.0014648438,-0.017562866,0.0022602081,0.0039024353,-0.02909851,-0.0003106594,-0.0035266876,0.001739502,-0.040008545,0.01902771,-0.0046920776,0.01789856,-0.023956299,0.017227173,-0.027252197,-0.0149383545,-0.037597656,-0.014251709,-0.020187378,0.009094238,0.025222778,-0.0012769699,0.02658081,0.006969452,-0.032592773,0.012886047,0.044799805,-0.007457733,-0.02758789,-0.0056381226,0.019180298,0.008544922,0.010902405,0.014663696,-0.022277832,-0.012840271,0.006542206,-0.013786316,0.0035362244,-0.0014705658,0.011474609,0.0027713776,-0.008934021,-0.011604309,0.029464722,-0.0059432983,-0.0027675629,0.019592285,0.0082473755,0.040618896,0.026657104,-0.0044555664,0.011260986,0.02583313,-0.03668213,0.06298828,0.004196167,0.024780273,-0.025238037,0.009460449,-0.038726807,-0.026397705,-0.013877869,0.01499176],"createdAt":"2026-04-18T19:28:02.664Z","updatedAt":"2026-04-22T04:02:12.966Z","lastSeenAt":"2026-04-22T04:02:12.966Z","tsv":"'/api/v1/transfers/44':56,163 '/request':13,28 '0.02':12,27,78,155 '000':72 '20':71 '402':66 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,92,168 'across':112 'actual':171 'addit':194 'advertis':83 'ai':122 'analysi':126 'analyt':116 'api':5,20,38,61,85,167 'attach':95 'base':8,23,51,73 'beyond':176 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67 'classif':129 'connect':189 'content':195 'convers':146 'crypto-paid API' 'data':115,119,204 'doc':180 'document':175,198 'embed':130 'endpoint':55,111,149,162,208 'estim':140 'exact':203 'exampl':200 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':172 'gas':139 'generat':147 'geocod':144 'header':100 'http-post' 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'key':86 'label':165,178 'learn':124 'limit':89 'list':58,151 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'metric':117 'network':9,24,52 'no-api-key' 'offer':110 'page':184 'particular':161 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,99,105 'per':3,18,36,79,156 'platform':6,21,39,82,109 'point':159 'premium':60,166 'premium API access' 'price':133,158,181 'prompt':191 'proof':106 'protocol':44 'quot':138 'rate':88,136 'readm':183 'remain':209 'report':118 'request':37,68,157 'respons':201 'return':64,186,205 'sentiment':125 'simpli':94 'specif':54 'summar':128 'text':127 'token':137 'unclear':210 'unit':74 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':190 'web3':132 'without':196 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 API' 'x402-payment'","prices":[{"id":"ebea3629-0597-44a3-98d7-cb4831adc0f0","listingId":"9dbff758-1fbb-4904-8df6-b99db302041d","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/transfers/44","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:02.664Z"}],"sources":[{"listingId":"9dbff758-1fbb-4904-8df6-b99db302041d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/44","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:02.664Z","lastSeenAt":"2026-04-22T04:02:12.966Z"}],"details":{"listingId":"9dbff758-1fbb-4904-8df6-b99db302041d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transfers/44 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/transfers/44"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request.","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises no API keys, no rate limits, instant access, and Base network settlement.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network.","source_url":"https://lowpaymentfee.com/api/v1/transfers/44"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various utility and data endpoints"],"bestFor":["Developers wanting keyless, pay-per-use API access settled in USDC","AI agents that can autonomously pay for API calls via x402","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-network USDC wallet or x402-compatible client","High-volume consumers who would benefit from bulk pricing or subscriptions"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:33.269Z"},"updatedAt":"2026-04-22T04:02:12.966Z"}}