{"id":"8171b1b2-abad-46aa-b213-38605b985c9a","shortId":"SBqaUw","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. All endpoints are paid per-request using USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no subscriptions required.\n\nThe specific endpoint at `/api/v1/transactions/269` is listed as \"Premium API Access\" and accepts POST requests. Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). The broader platform lists roughly 16 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 at the same $0.02 price point.\n\nDocumentation beyond the landing page is extremely sparse; the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The endpoint is confirmed live (402 challenge returned), but the actual behavior and response format of `/api/v1/transactions/269` specifically is unknown.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","geocoding","utility-apis"],"categories":["api-platform","llm","finance","geo"],"synonyms":["pay-per-call API","x402 API","USDC micropayment API","low fee API","Base network API","crypto-paid API","serverless API marketplace"],"warnings":["No OpenAPI spec or schema documentation available","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content","The purpose and expected input/output of /api/v1/transactions/269 specifically is unknown — 'Premium API Access' is not descriptive","No request or response examples available; actual endpoint behavior is unverified beyond the 402 challenge"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/269","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/269","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this specific endpoint does, no request/response schemas, no OpenAPI spec, and all doc pages render only 'Connect wallet'. The listing title 'Premium API Access' is generic and uninformative. Effectively a stub.","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":"2026-04-19T12:49:25.289Z","embedding":[-0.03656006,-0.02670288,0.04675293,0.015838623,0.008872986,-0.021347046,-0.029403687,0.027954102,0.07098389,-0.06427002,0.02784729,-0.041503906,-0.032440186,-0.043182373,-0.010276794,0.018371582,-0.020019531,0.010108948,-0.051849365,0.038757324,0.02268982,-0.029800415,-0.032836914,0.015945435,-0.012016296,-0.018966675,-0.0066986084,-0.0061912537,-0.03643799,-0.04623413,0.058532715,-0.027420044,-0.00044751167,-0.0010566711,0.0005931854,0.0030708313,0.008506775,0.0284729,0.0335083,-0.013343811,-0.0008277893,-0.06500244,-0.0011377335,-0.014144897,-0.041168213,-0.003665924,0.010894775,-0.028869629,0.01751709,0.0060653687,-0.04840088,-0.015899658,0.001666069,0.018188477,0.0009946823,0.0028476715,0.0041007996,0.0023918152,0.014541626,0.01083374,-0.005126953,-0.04937744,-0.009361267,-0.015731812,-0.019317627,0.052886963,-0.0053520203,0.043884277,-0.0064430237,0.05014038,0.031097412,0.039978027,0.033966064,0.023010254,0.0005903244,-0.008651733,-0.013015747,0.062683105,-0.022369385,-0.019454956,-0.002500534,-0.016738892,-0.06274414,-0.020751953,-0.004688263,-0.049194336,-0.022216797,0.015548706,-0.03994751,0.03466797,-0.059906006,-0.016815186,0.0020046234,0.0039405823,0.005367279,-0.011497498,-0.010650635,0.014884949,-0.012962341,0.024215698,0.0008406639,-0.048339844,0.022338867,0.010734558,0.033416748,0.04144287,0.019744873,0.0234375,0.0022888184,-0.010650635,-0.048339844,0.017974854,-0.0154418945,-0.018096924,0.012962341,0.006587982,-0.0069732666,0.008598328,-0.028533936,0.0038394928,-0.052001953,0.05328369,0.0077934265,0.0036716461,-0.0021896362,-0.054534912,-0.017623901,0.010223389,-0.043060303,-0.0069732666,0.005115509,0.013305664,0.029953003,-0.0154418945,-0.02961731,-0.0064888,-0.022842407,-0.0058631897,-0.044830322,-0.03137207,0.036102295,-0.027923584,0.014198303,0.039001465,-0.112976074,-0.021408081,-0.050323486,0.0115356445,-0.032470703,-0.01586914,0.01499176,0.022216797,-0.031433105,-0.028457642,-0.011924744,-0.023086548,-0.012298584,0.032287598,-0.025527954,0.03567505,-0.02708435,0.027816772,0.0051460266,0.0066833496,0.016662598,0.017807007,-0.00008392334,-0.0892334,-0.087890625,-0.026321411,0.016921997,-0.039794922,-0.03945923,-0.01550293,-0.016662598,-0.070495605,-0.019226074,-0.013977051,-0.0057678223,-0.04498291,-0.0045700073,-0.021148682,0.020050049,-0.011108398,-0.053588867,-0.028961182,-0.031829834,0.064941406,0.023345947,0.020431519,0.019927979,-0.003036499,0.06665039,0.04537964,0.0076293945,-0.023971558,0.010986328,-0.011749268,0.034942627,-0.0025234222,0.01713562,-0.043060303,0.030273438,0.0625,0.004863739,-0.030639648,-0.010810852,-0.047210693,-0.051483154,-0.03857422,0.02748108,0.015960693,-0.005718231,0.029434204,-0.033996582,-0.032440186,-0.0062408447,0.025146484,0.01197052,0.053344727,0.01576233,-0.001077652,0.017242432,0.014373779,-0.022964478,0.051879883,0.037902832,0.012962341,-0.011436462,-0.040893555,0.0345459,0.036224365,-0.025375366,0.018676758,-0.00944519,0.035247803,0.010276794,0.013191223,0.015914917,-0.004966736,-0.014083862,-0.015731812,-0.009811401,0.026046753,0.0129852295,-0.01878357,-0.030090332,-0.08807373,0.048797607,0.03591919,0.044830322,-0.013977051,-0.001914978,-0.016571045,-0.008857727,-0.0736084,0.03945923,0.07318115,-0.0016832352,-0.009300232,0.026031494,-0.0019607544,-0.0413208,-0.001411438,-0.022201538,-0.0362854,-0.0042152405,0.018600464,-0.048858643,-0.01991272,0.011131287,0.021484375,0.053771973,-0.013725281,-0.04663086,-0.028244019,-0.0063591003,0.004337311,-0.024917603,0.0030879974,-0.0003349781,0.021102905,0.023101807,0.002281189,0.010391235,0.0067253113,0.019317627,-0.01625061,0.01612854,-0.025543213,-0.03286743,0.006702423,0.000910759,-0.046539307,0.0066070557,-0.0075798035,0.06774902,-0.044830322,0.032836914,-0.017669678,0.012969971,0.04876709,0.0031337738,-0.048614502,0.017288208,0.03857422,0.020767212,0.044311523,0.014373779,-0.027999878,-0.01676941,0.08654785,-0.0005002022,-0.0021076202,0.008522034,-0.0011692047,0.034942627,-0.014579773,-0.054595947,-0.04168701,-0.0012388229,-0.024291992,0.029327393,0.0022773743,0.01763916,-0.019607544,0.0033740997,-0.02003479,-0.002243042,-0.030593872,0.021728516,-0.027130127,0.016311646,-0.023773193,-0.03869629,0.016479492,0.0043029785,-0.012130737,0.0012636185,0.05218506,0.017410278,-0.020614624,-0.024261475,-0.03314209,-0.008300781,-0.008178711,0.01586914,0.021728516,0.020736694,0.043395996,-0.027923584,-0.00592041,0.026031494,0.01360321,0.031585693,-0.0024471283,-0.0017614365,-0.055847168,-0.04324341,-0.024551392,-0.03253174,0.031311035,0.021377563,-0.0032291412,0.06439209,0.0062332153,-0.025039673,-0.039398193,0.026245117,-0.047454834,0.0021820068,0.03652954,0.0056762695,-0.040924072,-0.0030288696,-0.016174316,-0.006954193,0.031402588,0.018585205,0.02331543,0.062347412,0.028396606,0.0040664673,0.02709961,0.0019187927,0.03643799,0.009048462,-0.02973938,-0.034179688,-0.017105103,0.032318115,-0.016647339,-0.023345947,-0.078125,0.054107666,0.031799316,0.079956055,0.013748169,0.0038871765,0.034362793,0.0031032562,0.018066406,-0.01966858,-0.022216797,-0.017456055,-0.03466797,0.028656006,-0.0066871643,-0.0043907166,-0.017501831,0.03591919,-0.01210022,0.020233154,-0.02583313,0.042663574,-0.01285553,-0.0099487305,0.019424438,0.0044937134,0.054840088,0.062561035,-0.03955078,0.017166138,0.024108887,-0.047973633,0.010261536,0.052612305,-0.012565613,-0.011367798,-0.038879395,-0.0146102905,-0.015838623,-0.011795044,-0.043823242,0.00026774406,0.008544922,0.019561768,0.034210205,-0.009384155,-0.012107849,-0.00036215782,-0.016708374,-0.05404663,0.011436462,-0.041381836,0.011245728,0.046539307,-0.03503418,-0.00025606155,-0.0068969727,-0.0065307617,-0.0135650635,-0.001912117,0.028930664,-0.019989014,-0.047698975,0.05441284,0.0057144165,0.014053345,0.01550293,0.02470398,0.021499634,0.019302368,0.038391113,0.011177063,-0.021774292,-0.0569458,0.020462036,-0.042541504,0.009963989,0.028030396,-0.019989014,-0.006259918,0.004611969,-0.036193848,-0.026000977,0.0127334595,-0.008399963,-0.005016327,0.008590698,-0.031982422,-0.026382446,-0.05859375,-0.00374794,-0.0052108765,0.057922363,0.022781372,-0.0060691833,-0.058807373,-0.00023174286,0.039215088,-0.0017204285,0.031402588,-0.0149002075,-0.0055656433,-0.007434845,-0.03878784,-0.010719299,-0.01586914,0.019882202,0.002029419,-0.0067329407,0.02418518,0.0033912659,0.018417358,0.010604858,0.0031318665,0.022415161,-0.03100586,-0.011993408,-0.0034599304,0.028060913,0.012329102,-0.018310547,-0.03704834,0.02406311,0.0069084167,0.042266846,-0.030059814,-0.014091492,-0.0031394958,0.0129470825,0.023040771,-0.02154541,-0.021820068,-0.024093628,-0.044158936,-0.06530762,0.04055786,-0.021408081,0.029830933,0.031555176,0.010650635,0.018447876,-0.022125244,0.012954712,0.01676941,-0.028213501,-0.005962372,-0.024734497,-0.030929565,-0.011436462,-0.0056037903,-0.019638062,0.01889038,-0.019378662,0.0146865845,0.0005517006,-0.028182983,0.037322998,0.01499176,-0.0033016205,0.017150879,0.0054397583,0.02947998,0.032287598,0.01939392,-0.050109863,0.026473999,-0.0014419556,0.010604858,-0.016082764,0.046691895,0.025726318,-0.0026474,-0.007575989,-0.003200531,-0.019714355,-0.01939392,0.005596161,0.0014066696,0.009597778,-0.005962372,-0.04736328,0.02532959,-0.0037155151,-0.032226562,-0.037628174,0.02279663,0.009986877,-0.04168701,0.027999878,0.022659302,0.059448242,-0.019638062,0.024993896,0.01146698,0.054626465,0.03753662,0.007335663,-0.010520935,0.01876831,-0.011642456,0.015159607,-0.01777649,-0.001707077,0.024520874,0.0017976761,0.01838684,0.02268982,0.004627228,-0.022018433,-0.03427124,0.003692627,-0.018981934,-0.016220093,0.012489319,0.016021729,0.032989502,-0.028320312,0.023620605,0.005935669,-0.014579773,-0.015670776,0.0005378723,0.022460938,-0.016220093,-0.007106781,0.018188477,0.0034370422,0.020126343,-0.057739258,-0.012298584,0.016983032,0.01651001,-0.013183594,-0.053466797,-0.04156494,0.0073432922,0.035583496,0.0035533905,0.026382446,0.023727417,-0.0049743652,0.008262634,0.022705078,-0.007701874,-0.015670776,-0.0012645721,-0.047180176,-0.02532959,0.001991272,0.007041931,-0.04107666,0.018722534,-0.018463135,-0.022415161,0.0012989044,-0.029632568,-0.005367279,-0.017242432,0.012481689,0.04095459,0.0029907227,0.0124053955,-0.022323608,-0.030700684,-0.009597778,0.009674072,0.023284912,-0.03866577,0.031341553,-0.012466431,-0.005077362,0.00043058395,0.01713562,0.022125244,0.018829346,0.012428284,0.033599854,-0.047973633,0.046051025,-0.013839722,0.027053833,0.00047421455,-0.027999878,-0.0151901245,-0.026641846,-0.014381409,0.04711914,-0.025222778,-0.017425537,-0.034851074,-0.030349731,-0.009437561,-0.053894043,0.019241333,0.031463623,0.03857422,-0.013893127,-0.00038814545,0.0036067963,0.010948181,-0.0035591125,0.0007300377,-0.01171875,0.024978638,0.02998352,-0.008361816,-0.020065308,-0.019882202,-0.024337769,-0.011566162,-0.062561035,-0.05758667,-0.0050239563,0.025650024,-0.011329651,-0.0067749023,-0.032714844,-0.03564453,0.006198883,-0.047851562,0.01486969,-0.0037250519,0.020401001,-0.0059394836,-0.016525269,-0.0063972473,0.007369995,-0.0119018555,0.027496338,-0.0051612854,-0.008369446,-0.045532227,0.011955261,0.021636963,0.028366089,-0.00039315224,-0.026138306,-0.0019721985,-0.02670288,-0.049987793,-0.010131836,-0.002319336,-0.01928711,-0.0074157715,0.0031929016,-0.0524292,0.0009255409,-0.026748657,-0.015151978,0.022659302,0.0070724487,0.0034446716,-0.009689331,0.010314941,-0.003873825,-0.015304565,-0.02998352,0.011940002,0.010887146,0.0052871704,0.022994995,0.060913086,0.00006580353,-0.01675415,-0.00020349026,0.0012578964,0.0211792,-0.019454956,0.016082764,-0.011726379,0.016571045,-0.019577026,-0.0076293945,-0.030380249,-0.0027599335,0.078430176,0.009284973,-0.01159668,-0.008155823,-0.019058228,0.012641907,0.029144287,-0.025817871,-0.00044083595,-0.026809692,0.025238037,-0.027053833,0.017837524,0.008766174,0.02017212,-0.02456665,-0.055480957,-0.0031604767,0.0040512085,-0.008155823,-0.08093262,-0.018325806,-0.068359375,0.0037708282,-0.017242432,-0.030914307,0.0065307617,0.008972168,-0.009597778,-0.09667969,-0.0034599304,0.05090332,0.0033283234,0.03353882,-0.0068626404,0.020385742,0.03466797,-0.018676758,0.0017910004,0.027679443,-0.028747559,-0.01966858,-0.017730713,0.026504517,0.00032424927,-0.010467529,0.00014352798,0.006580353,0.0129470825,0.0028133392,0.012283325,-0.022125244,0.024475098,-0.01574707,0.023223877,-0.012458801,-0.008415222,0.03970337,-0.05218506,0.036590576,0.012771606,0.006629944,0.0127334595,0.040130615,0.034698486,-0.044403076,-0.00944519,0.008728027,0.013160706,0.024139404,-0.021377563,0.050354004,0.016067505,-0.0056877136,0.0076141357,-0.010665894,0.0017795563,-0.020736694,-0.035827637,0.027297974,0.0045280457,0.013595581,-0.02079773,-0.010513306,0.021102905,0.0012779236,0.0075798035,-0.00248909,-0.014541626,-0.028793335,0.007068634,-0.0029239655,0.0055389404,0.00017607212,0.028457642,0.018814087,0.035064697,0.010498047,-0.016204834,0.0063171387,0.033111572,-0.006385803,-0.00548172,0.026809692,0.0070877075,0.010536194,0.016159058,0.014831543,-0.051208496,-0.008995056,-0.027374268,-0.019821167,0.004383087,-0.0088272095,-0.012283325,0.00035452843,0.0022697449,-0.002817154,-0.029251099,-0.0020008087,-0.023788452,-0.03466797,-0.009979248,0.001832962,0.024414062,0.010154724,0.011993408,0.005264282,-0.0032749176,0.046966553,-0.006790161,-0.018188477,0.024993896,0.036987305,0.015213013,-0.03994751,-0.0046920776,-0.013893127,-0.0068626404,0.005504608,-0.025314331,0.016525269,0.038146973,-0.017028809,0.0076026917,0.0038337708,0.02494812,-0.0143966675,0.0050468445,-0.010498047,0.019866943,-0.014663696,0.034484863,-0.058166504,0.026855469,0.022262573,0.0011825562,-0.017059326,-0.0234375,-0.028961182,0.025741577,-0.011352539,-0.0012779236,0.04748535,0.006511688,0.024734497,-0.01473999,-0.008468628,-0.001619339,-0.035705566,-0.02720642,0.012298584,-0.014923096,0.0051612854,0.008842468,-0.03778076,0.0236969,-0.03515625,0.008132935,0.004611969,0.008331299,-0.009216309,-0.015304565,-0.009101868,-0.008415222,-0.02128601,-0.011245728,-0.011741638,0.054595947,0.024902344,0.04232788,0.040161133,0.00579834,-0.00048613548,-0.04397583,-0.021270752,0.0058403015,-0.019500732,0.022155762,-0.020645142,0.037719727,0.04888916,-0.009979248,0.035858154,0.03491211,0.043273926,-0.0090408325,0.024398804,-0.023590088,0.02078247,-0.0141067505,0.0154800415,-0.0023155212,0.039031982,-0.017807007,0.01763916,0.02067566,0.028640747,-0.014251709,0.038757324,0.064331055,0.021759033,-0.0016927719,0.036712646,0.00025057793,-0.0006380081,-0.0009832382,-0.028747559,0.052978516,0.0005993843,0.056427002,0.047088623,0.00091695786,0.0063819885,0.02368164,-0.025360107,-0.015045166,0.06378174,0.021255493,-0.015571594,-0.0068359375,-0.019470215,0.002073288,-0.04336548,-0.027740479,0.0155181885,-0.011497498,0.007881165,-0.015403748,-0.010276794,-0.010749817,0.004261017,0.01360321,0.013694763,-0.012252808,0.014144897,0.026626587,0.007396698,0.018630981,-0.0046157837,0.019638062,-0.026397705,-0.016220093,0.019195557,0.018157959,-0.007835388,-0.0063209534,0.025314331,0.0066719055,0.048339844,0.036376953,-0.024871826,0.0014371872,0.025619507,0.014343262,0.0012483597,0.05029297,0.03338623,0.01713562,0.032928467,0.039978027,0.04067993,-0.03149414,0.023986816,-0.0047721863,0.007434845,-0.02557373,-0.008285522,0.00078868866,-0.008522034,0.019454956,-0.0050964355,-0.02029419,0.0113220215,0.020019531,-0.009422302,-0.0135269165,-0.0055618286,0.015930176,-0.018310547,-0.0056037903,0.0141067505,-0.022232056,0.021820068,0.0072898865,0.015823364,-0.015403748,0.032928467,-0.0006518364,-0.016937256,0.0007586479,0.032928467,-0.045440674,0.011062622,-0.0021972656,-0.0078125,-0.04977417,0.006919861,0.012229919,0.0024280548,0.019195557,0.0231781,-0.0034046173,0.002494812,0.021575928,0.010948181,0.0012340546,-0.012069702,-0.021377563,0.031951904,0.04071045,0.009689331,0.006706238,-0.011154175,-0.0031795502,0.012039185,-0.008033752,-0.0057907104,-0.009986877,-0.019454956,-0.013763428,0.018875122,0.03466797,0.020248413,0.041503906,-0.017654419,-0.017227173,0.010620117,0.030715942,0.0021018982,-0.0078125,0.0024166107,0.02104187,-0.021728516,0.044769287,0.04574585,0.010314941,0.040924072,-0.0023212433,-0.009353638,0.011177063,-0.017318726,0.037322998,-0.0119018555,0.0067367554,0.009918213,0.034179688,-0.0154800415,-0.033050537,0.01096344,-0.023620605,-0.025848389,-0.015655518,0.0051193237,-0.0026550293,0.029953003,0.0423584,0.022384644,-0.019607544,0.06384277,-0.014038086,0.048980713,0.0001296997,-0.020950317,0.05166626,0.028457642,0.031585693,0.005191803,0.0031433105,-0.037597656,0.020828247,0.035247803,0.024032593,0.01260376,-0.012451172,-0.008407593,0.025238037,-0.0030879974,0.03302002,0.0020828247,0.0046310425,0.017303467,-0.010238647,-0.01701355,-0.005268097,-0.001042366,0.0030174255,0.050994873,-0.020507812,-0.0079193115,-0.024597168,-0.019577026,0.02671814,-0.004032135,-0.0061416626,-0.0149383545,-0.011833191,0.018539429,-0.029800415,-0.018234253,0.014213562,0.026031494,-0.05569458,-0.02279663,0.015113831,0.011650085,-0.015731812,0.029953003,0.021011353,-0.0035991669,0.0013341904,0.036834717,-0.011230469,0.02166748,-0.005355835,0.0335083,0.020477295,0.007106781,-0.028060913,-0.0014743805,0.00333786,-0.014175415,0.01739502,0.028961182,-0.017562866,-0.0068740845,-0.005844116,-0.0062561035,-0.0025844574,-0.011161804,-0.0132369995,0.0066452026,0.0007982254,-0.00995636,0.013595581,0.0087890625,-0.0029125214,0.013633728,0.0028896332,-0.018066406,0.016921997,0.042297363,0.017333984,-0.039031982,-0.009101868,0.007835388,-0.0020885468,-0.024917603,-0.024520874,-0.015258789,-0.032714844,0.0065193176,0.016525269,0.0074310303,0.013832092,-0.031173706,-0.00069093704,0.023254395,-0.0008702278,0.025024414,0.008422852,-0.009017944,0.011245728,-0.014305115,-0.005657196,-0.015205383,-0.02168274,0.014915466,0.020935059,0.0018177032,-0.018432617,0.02456665,-0.0016145706,0.018569946,0.0005559921,-0.0036449432,0.013252258,-0.014633179,-0.011398315,0.005218506,0.019226074,-0.016067505,-0.013832092,-0.005886078,0.0231781,0.043273926,-0.013130188,-0.011550903,0.01889038,0.019302368,0.015792847,0.038391113,0.019012451,0.045013428,0.032562256,-0.018707275,-0.012008667,0.013450623,-0.0032653809,-0.027923584,0.019958496,0.007007599,-0.014503479,0.025054932,0.011146545,0.0090408325,-0.030349731,-0.013977051,-0.005836487,-0.026657104,0.009895325,-0.0006489754,0.02558899,-0.01687622,-0.015960693,0.010543823,-0.01928711,-0.050872803,-0.006969452,-0.009300232,-0.019851685,-0.05328369,-0.0029678345,-0.026504517,0.0033493042,-0.014701843,0.0043792725,-0.0045051575,0.019714355,-0.0062942505,-0.008094788,-0.00793457,0.026031494,0.02432251,0.0028133392,0.014465332,-0.019104004,-0.017990112,-0.028686523,0.0077209473,-0.017623901,0.016571045,0.004837036,0.03643799,0.014289856,-0.011734009,0.0020923615,-0.014450073,0.00075244904,-0.0087890625,-0.019317627,-0.015457153,0.026443481,0.017593384,-0.000518322,-0.007358551,0.031204224,-0.026275635,-0.0011997223,0.03186035,0.038604736,-0.002691269,0.040771484,-0.02357483,0.0069465637,-0.01966858,0.008071899,-0.0050735474,0.0015611649,0.004016876,0.014480591,0.0047721863,0.0055503845,0.019592285,-0.011711121,0.0015583038,0.036834717,0.011421204,-0.0038394928,0.04321289,0.0155181885,0.012527466,-0.017669678,-0.006362915,0.023529053,0.04736328,0.010826111,0.012687683,-0.009063721,0.008628845,-0.0151901245,0.010948181,0.00831604,-0.016693115,-0.04724121,-0.017425537,-0.036224365,0.020431519,-0.006061554,0.0049819946,-0.012916565,0.0048561096,-0.012031555,-0.03024292,-0.026397705,0.029037476,0.0058403015,-0.020843506,-0.013832092,-0.000102460384,0.024642944,-0.022857666,0.006580353,-0.039886475,-0.03353882,-0.013694763,-0.01360321,0.0234375,-0.003250122,-0.00945282,-0.0017385483,-0.008369446,0.0014209747,-0.004310608,0.023666382,-0.016647339,-0.005332947,0.016921997,0.026031494,-0.026107788,0.023406982,-0.014816284,-0.004272461,0.009719849,-0.011474609,0.016723633,-0.02279663,0.029876709,-0.007621765,-0.0033912659,0.040924072,-0.0013914108,0.021652222,-0.035369873,-0.008483887,-0.0026245117,-0.007686615,0.0524292,-0.009918213,-0.022399902,0.004299164,-0.020431519,-0.024047852,0.0016975403,0.0066947937,0.01965332,-0.0003144741,0.05319214,-0.010765076,-0.008346558,0.017715454,0.012229919,-0.01777649,-0.0012845993,0.026153564,0.00983429,0.004711151,-0.0087509155,-0.010574341,-0.027740479,-0.012916565,0.01486969,-0.0047187805,-0.013305664,0.021942139,0.021636963,0.042175293,-0.0052375793,0.020217896,0.016189575,0.00806427,0.03778076,-0.00081014633,0.034240723,-0.0037117004,-0.030166626,0.000018894672,0.00011640787,-0.033081055,0.008178711,-0.00995636,0.004875183,-0.04269409,0.01663208,0.005252838,0.03125,-0.011451721,0.018356323,-0.027877808,-0.010765076,-0.03741455,-0.010658264,-0.043792725,0.0038700104,0.034484863,0.00011694431,0.026504517,0.0031967163,-0.020904541,0.02104187,0.053833008,0.0068359375,-0.018203735,-0.018661499,0.0035037994,-0.00037527084,0.0149383545,0.007068634,-0.005393982,-0.025100708,-0.0058021545,-0.014793396,0.011749268,-0.017074585,0.011306763,0.015655518,-0.003293991,-0.008399963,0.028930664,0.00013387203,-0.0009460449,0.0062561035,-0.0012083054,0.03427124,0.020477295,-0.02130127,0.01399231,0.016647339,-0.053253174,0.06463623,-0.00010919571,0.043151855,-0.011375427,0.008880615,-0.033081055,-0.02015686,-0.014328003,0.00024795532],"createdAt":"2026-04-18T18:59:45.678Z","updatedAt":"2026-04-22T19:32:16.812Z","lastSeenAt":"2026-04-22T19:32:16.812Z","tsv":"'/api':193 '/api/v1/transactions/269':96,242 '/docs':192 '/pricing':194 '/readme':196 '/request':19,38 '0.02':18,37,127,180 '000':116 '0x8335':121 '16':139 '20':115 '2913':122 '402':231 '6':132 'Base network API' 'USDC micropayment API' 'accept':104 'access':102 'across':141 'actual':236 'advertis':110 'ai':12,31,151 'ai-inference' 'ai/ml':57 'analysi':155 'analyt':56,145 'api':5,24,45,83,101 'avail':222 'base':8,27,76,117,124 'behavior':237 'beyond':184 'broad':50 'broader':135 'call':4,23,129 'catalog':51 'categori':143 'challeng':109,232 'classif':158 'classification' 'confirm':229 'connect':202 'content':208 'convers':174 'cost':113 'crawl':225 'crypto-paid API' 'crypto-quotes' 'data':11,30,55,60,144,148 'data-analytics' 'decim':133 'document':183,217 'embed':159 'embeddings' 'enabl':44 'endpoint':16,35,53,66,94,140,227 'equal':126 'estim':169 'exampl':221 'exchang':164 'export':149 'extrem':189 'feed':163 'financ':13,32,160 'finance-data' 'finance/web3':59 'format':240 'four':142 'gas':168 'general':62 'generat':175 'geocod':172 'geocoding' 'infer':58 'infrastructure/utilities':171 'insight':150 'key':84 'land':186 'learn':153 'limit':87 'list':98,137 'live':230 'low fee API' 'lowpaymentfee.com':39 'machin':152 'maximum':112 'metric':146 'network':77 'offer':10,29 'openapi':212 'page':187,197 'paid':68 'pay':2,21 'pay-per-cal':1,20 'pay-per-call API' 'per':3,22,70,128 'per-request':69 'per-request-billing' 'platform':6,25,46,136 'point':182 'post':105 'premium':100 'price':162,181 'prompt':204 'protocol':81 'provid':48 'quot':167 'rate':86,165 'render':199 'report':147 'request':71,106 'request/response':215 'requir':91 'respons':239 'return':233 'rough':138 'schema':216 'sentiment':154 'sentiment-analysis' 'serverless API marketplace' 'servic':64 'span':54 'spars':190 'spec':213 'specif':93,243 'subscript':90 'summar':157 'text':156 'text-summarization' 'token':166 'unit':118 'unknown':245 'usag':220 'usdc':9,28,73,120,130 'usdc-base' 'use':72,131 'util':15,34,63 'utility-apis' 'valid':173 'via':78 'wallet':203 'web3':161 'x402':43,80,108 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"3839a101-2940-4c5d-a3ae-f4dfdb68d40f","listingId":"8171b1b2-abad-46aa-b213-38605b985c9a","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/269","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:59:45.678Z"}],"sources":[{"listingId":"8171b1b2-abad-46aa-b213-38605b985c9a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/269","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:45.678Z","lastSeenAt":"2026-04-22T19:32:16.812Z"}],"details":{"listingId":"8171b1b2-abad-46aa-b213-38605b985c9a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/269 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/269"},{"claim":"The platform lists ~16 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Platform advertises no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/269"}],"useCases":["Agents needing on-demand AI inference (sentiment, summarization, classification) without API key management","Fetching real-time crypto token quotes or gas estimates via a single paid call","Geocoding or data validation as a utility microservice with no subscription commitment","Exporting analytics data or generating insights on a per-request basis","Programmatic access to exchange rates and price feeds for financial applications"],"bestFor":["AI agents that need keyless, pay-per-call access to diverse utility endpoints","Developers wanting to avoid API key provisioning and subscription overhead","Low-volume or bursty workloads where per-request pricing is cost-effective"],"notFor":["High-volume production workloads where $0.02/request adds up significantly","Users who need detailed API documentation, SLAs, or guaranteed uptime","Applications requiring non-USDC or non-Base-network payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.365Z"},"updatedAt":"2026-04-22T19:32:16.812Z"}}