{"id":"9074132b-34ca-433b-a727-57ae2e6d762d","shortId":"VF4zCU","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 broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are paid per-request using USDC on the Base network at a flat rate of $0.02 per call, with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint at `/api/v1/accounts/4` is listed as \"Premium API Access\" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme, settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 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 beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so the actual request/response schemas for this and other endpoints are unknown. Without documentation or OpenAPI specs, callers will need to experiment to discover the expected input format and response structure.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method","no-api-key","accounts-endpoint"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No API documentation available — all doc/pricing/README pages return only 'Connect wallet'","No OpenAPI or schema definition for request or response payloads","The specific purpose and expected input of /api/v1/accounts/4 is undocumented","Cannot verify what data or functionality this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/4","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/accounts/4","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. However, there is no OpenAPI spec, no documentation (all doc pages are empty), no request/response schema, and no examples. The purpose of the /api/v1/accounts/4 endpoint specifically is unclear beyond the generic label \"Premium API Access.\"","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":"2026-04-19T00:29:59.521Z","embedding":[-0.030181885,-0.032592773,0.045898438,0.025222778,0.009208679,-0.029830933,-0.008094788,0.023391724,0.07519531,-0.058166504,0.031021118,-0.046539307,-0.029815674,-0.028396606,-0.016571045,0.010765076,-0.0004837513,0.003742218,-0.036956787,0.023376465,0.013923645,-0.020217896,-0.02798462,0.027114868,-0.002527237,-0.021713257,-0.007835388,-0.0069084167,-0.017547607,-0.050048828,0.04498291,-0.025375366,-0.008110046,0.016815186,-0.010108948,0.00050735474,-0.006767273,0.0335083,0.03265381,-0.008056641,-0.0069999695,-0.0541687,0.012130737,-0.016952515,-0.06213379,-0.0058021545,0.008712769,-0.022979736,0.0070648193,0.009307861,-0.034362793,-0.0038471222,0.00258255,-0.0011911392,0.0017518997,0.011360168,-0.00042533875,-0.007472992,0.018218994,0.024917603,-0.011878967,-0.053527832,-0.01235199,-0.004146576,0.007621765,0.058776855,-0.0058631897,0.037475586,-0.002046585,0.06817627,0.03201294,0.053710938,0.036468506,0.012214661,-0.0028438568,-0.0087509155,-0.0064888,0.0546875,-0.011489868,-0.038116455,-0.00894928,-0.02041626,-0.05429077,-0.00007110834,-0.019226074,-0.04067993,-0.019546509,0.028182983,-0.02470398,0.035217285,-0.06677246,-0.0004401207,-0.019836426,-0.003353119,0.014549255,-0.0016202927,-0.007648468,0.016677856,-0.00299263,0.013542175,0.0012836456,-0.03515625,0.020095825,-0.00121212,0.032562256,0.056854248,0.019241333,0.012557983,-0.00007349253,0.0044021606,-0.024169922,0.014968872,-0.016494751,-0.019927979,0.019714355,-0.00724411,-0.011947632,0.018249512,-0.037963867,0.012283325,-0.0418396,0.047088623,0.0051498413,0.01828003,0.0118255615,-0.05517578,-0.018341064,0.011146545,-0.022109985,-0.0031375885,0.009147644,0.012710571,0.025512695,-0.012718201,-0.024002075,0.01285553,-0.022750854,-0.012519836,-0.04714966,-0.02633667,0.04647827,-0.028579712,0.016159058,0.04272461,-0.09460449,-0.01448822,-0.042907715,0.0069503784,-0.02973938,-0.01234436,0.00075769424,0.026489258,-0.014083862,-0.01197052,-0.019760132,-0.035949707,-0.0020370483,0.033172607,-0.0063705444,0.052612305,-0.020874023,0.025848389,0.027145386,0.0090789795,0.018966675,0.03579712,-0.009506226,-0.07763672,-0.08569336,-0.025405884,-0.0044021606,-0.023208618,-0.017028809,-0.007583618,-0.004020691,-0.07952881,-0.015602112,-0.0085372925,-0.00806427,-0.025146484,-0.0026988983,-0.030807495,0.016311646,-0.010131836,-0.057373047,-0.012161255,-0.025970459,0.05606079,0.030654907,0.02633667,0.023803711,-0.015945435,0.061767578,0.020324707,-0.013717651,-0.0126571655,0.024383545,-0.024307251,0.016296387,0.0014314651,0.020431519,-0.026367188,0.03048706,0.0725708,0.003314972,-0.028366089,-0.009674072,-0.05706787,-0.046722412,-0.029022217,0.021881104,0.013389587,-0.0067863464,0.039398193,-0.03869629,-0.038024902,0.0001219511,0.022842407,0.005252838,0.05947876,0.0016155243,-0.0033493042,0.031677246,0.015975952,-0.068359375,0.04159546,0.035247803,0.004535675,-0.015625,-0.036712646,0.033416748,0.03010559,-0.020645142,0.017913818,-0.02079773,0.027526855,-0.012245178,0.013191223,0.012969971,-0.011817932,-0.02178955,-0.029418945,-0.024765015,0.02798462,0.0042419434,-0.020202637,-0.029830933,-0.09460449,0.048919678,0.03338623,0.03869629,0.0045394897,0.0115737915,-0.01826477,-0.0016098022,-0.07116699,0.06744385,0.06585693,0.017501831,-0.018859863,0.021453857,-0.012916565,-0.038482666,0.0041122437,-0.012634277,-0.03353882,-0.02532959,0.031219482,-0.05331421,0.0030784607,0.012290955,0.011199951,0.04107666,-0.016326904,-0.044647217,-0.020568848,-0.007820129,0.0069274902,-0.025604248,0.008407593,-0.0066566467,0.014656067,0.023666382,0.009689331,0.013206482,-0.012794495,-0.010658264,-0.005962372,0.00944519,-0.010536194,-0.030303955,0.00737381,0.0037631989,-0.054229736,-0.0003299713,-0.00091934204,0.07055664,-0.049041748,0.0335083,-0.0069999695,0.004589081,0.04333496,-0.0048599243,-0.050628662,0.007858276,0.026351929,0.023239136,0.05239868,0.022567749,-0.036499023,-0.009208679,0.07550049,-0.0104522705,-0.0055274963,0.03225708,0.015731812,0.036499023,-0.009147644,-0.060455322,-0.034088135,0.000008225441,-0.04272461,0.026931763,-0.030853271,0.029159546,-0.01637268,0.014732361,-0.023468018,0.0020980835,-0.03491211,0.011192322,-0.014724731,0.009887695,-0.012672424,-0.01777649,0.009857178,0.0047302246,-0.013763428,0.006389618,0.037994385,0.01939392,-0.009628296,-0.022903442,-0.03744507,-0.0016241074,-0.012359619,0.01586914,0.022476196,0.018234253,0.05227661,-0.030548096,-0.008926392,0.02923584,0.009338379,0.040863037,-0.006752014,-0.0044021606,-0.06732178,-0.050872803,-0.027740479,-0.040374756,0.020187378,0.032073975,-0.011421204,0.051605225,0.0037651062,-0.021575928,-0.041503906,0.019210815,-0.043121338,0.0023975372,0.0390625,-0.03314209,-0.018692017,0.0014381409,0.0008177757,0.0028934479,0.031280518,0.020111084,0.034576416,0.07696533,0.04537964,0.010314941,0.015296936,0.0043411255,0.03137207,0.010864258,-0.01612854,-0.02784729,-0.01713562,0.033233643,-0.020431519,-0.017822266,-0.06628418,0.0713501,0.033813477,0.09643555,0.026901245,-0.0025196075,0.03427124,-0.028182983,0.0044937134,-0.035095215,-0.031463623,-0.022994995,-0.029083252,0.0284729,-0.012718201,-0.0028629303,-0.016082764,0.041046143,-0.0039405823,0.022705078,-0.029373169,0.048675537,-0.017623901,-0.020721436,0.013938904,0.014160156,0.049072266,0.052490234,-0.04119873,0.036193848,0.017623901,-0.029678345,0.0016441345,0.042541504,-0.018463135,-0.0020999908,-0.059143066,-0.019500732,-0.01209259,-0.01474762,-0.04083252,-0.0064697266,-0.004814148,0.024780273,0.03643799,-0.0041923523,-0.0107421875,-0.004142761,-0.006706238,-0.05758667,-0.014328003,-0.040649414,-0.010848999,0.035339355,-0.03439331,-0.009544373,0.0051727295,-0.013908386,-0.016677856,0.0127334595,0.026016235,-0.001294136,-0.056793213,0.043182373,0.0062828064,0.019973755,0.008453369,0.04916382,0.030303955,0.023513794,0.048461914,0.011894226,-0.009567261,-0.05999756,0.032165527,-0.06185913,0.006790161,0.0357666,-0.020019531,-0.0070533752,-0.011886597,-0.04034424,-0.022415161,0.02079773,-0.031829834,0.006298065,0.01272583,-0.01600647,-0.02217102,-0.042266846,-0.020263672,-0.010231018,0.05847168,0.019088745,0.010063171,-0.057006836,-0.013061523,0.019424438,0.010848999,0.031402588,-0.0143966675,-0.0010309219,-0.024124146,-0.030044556,-0.006832123,-0.02166748,0.030258179,-0.010688782,-0.0023517609,0.016921997,0.02017212,0.022201538,0.00082445145,0.011795044,0.01977539,-0.03201294,0.004337311,-0.0073890686,0.04220581,0.011695862,-0.003440857,-0.04168701,0.037963867,0.009643555,0.03265381,-0.041625977,-0.000415802,-0.0030708313,0.014579773,0.021453857,-0.014274597,-0.004917145,-0.006767273,-0.041625977,-0.07183838,0.041381836,-0.03186035,0.027374268,0.02722168,0.0087509155,0.031036377,-0.016159058,0.0046958923,0.014694214,-0.026443481,-0.015350342,-0.017929077,-0.032196045,-0.023086548,-0.012939453,-0.027160645,0.01626587,-0.018798828,0.012954712,-0.0018005371,-0.015808105,0.014694214,0.006095886,-0.0065994263,0.019973755,-0.0058517456,0.022720337,0.045959473,0.014198303,-0.04095459,0.018463135,0.0007638931,0.0022277832,-0.006664276,0.045410156,0.03463745,-0.006980896,-0.015235901,-0.008346558,-0.011009216,-0.030471802,0.006084442,0.0039520264,0.009208679,-0.0027637482,-0.040008545,0.004802704,0.0017585754,-0.028320312,-0.026382446,0.019363403,0.015853882,-0.033233643,0.023269653,0.030044556,0.04711914,-0.022644043,0.004173279,-0.005088806,0.02909851,0.037750244,0.010948181,-0.004776001,0.021347046,-0.009529114,0.019348145,-0.009902954,-0.011650085,0.011711121,0.011917114,0.02217102,0.029968262,0.0035171509,-0.025405884,-0.034057617,0.0053901672,-0.011352539,-0.031204224,0.019744873,0.017608643,0.028289795,-0.02708435,0.019210815,0.010566711,-0.02331543,-0.012176514,-0.010040283,0.04260254,-0.0050735474,-0.022003174,0.020263672,0.014541626,0.019866943,-0.055847168,-0.006565094,0.007865906,0.016113281,-0.028076172,-0.054595947,-0.033447266,0.0056877136,0.0362854,0.009399414,0.030548096,0.03488159,0.0029411316,-0.0011072159,0.018066406,0.002073288,-0.011398315,-0.0096588135,-0.0463562,-0.015098572,-0.020462036,-0.003440857,-0.030700684,0.01889038,-0.0022335052,-0.03189087,-0.0005507469,-0.009483337,-0.0033931732,-0.0020771027,0.0035037994,0.038116455,-0.0012655258,0.018920898,-0.023071289,-0.038726807,-0.0132369995,0.0030593872,0.0047416687,-0.04788208,0.013900757,-0.0059432983,-0.0143966675,0.0075302124,0.017944336,0.014472961,0.022201538,0.017837524,0.037200928,-0.05596924,0.04458618,-0.035003662,0.018295288,0.008110046,-0.03289795,-0.0075263977,-0.020385742,-0.010467529,0.033477783,-0.02003479,-0.0066375732,-0.02482605,-0.03579712,-0.010627747,-0.05819702,0.0113220215,0.02758789,0.037719727,-0.035614014,-0.006752014,0.0054244995,0.0118637085,-0.01399231,0.009895325,-0.017150879,0.02305603,0.024810791,-0.0028686523,-0.01725769,-0.020248413,-0.029174805,-0.0063934326,-0.049316406,-0.055419922,-0.008773804,-0.0030441284,-0.00032877922,-0.0055160522,-0.02909851,-0.03149414,-0.008575439,-0.041503906,0.013015747,-0.003768921,0.019805908,0.0033626556,-0.029342651,0.00035524368,0.017318726,-0.019958496,0.029556274,0.017807007,-0.005569458,-0.041229248,0.0058021545,0.016342163,0.008804321,-0.008613586,-0.018829346,-0.015716553,-0.016082764,-0.058746338,-0.0016784668,-0.007801056,-0.011665344,-0.022537231,0.0013217926,-0.05496216,-0.0034313202,-0.020111084,0.00094366074,0.010978699,0.013717651,-0.0036239624,0.0037517548,0.01638794,0.003271103,-0.0011472702,-0.030807495,0.004550934,0.010940552,0.006767273,0.029373169,0.044403076,-0.0014352798,-0.027893066,0.016098022,0.007446289,0.024368286,-0.0151901245,-0.0010137558,-0.021850586,0.009605408,-0.015914917,-0.011932373,-0.035217285,0.007896423,0.0803833,-0.0032444,-0.013702393,-0.017501831,-0.019348145,0.01586914,0.030151367,-0.04046631,-0.0076560974,-0.031921387,0.02029419,-0.022521973,0.018325806,-0.001537323,0.024383545,-0.012817383,-0.042388916,-0.0151901245,-0.0034637451,-0.0116119385,-0.061187744,-0.02230835,-0.067993164,0.011238098,-0.02027893,-0.017120361,0.0038661957,0.016159058,-0.022781372,-0.076660156,0.0051956177,0.046020508,-0.0014667511,0.030410767,-0.0007004738,0.010116577,0.023529053,-0.03366089,-0.0009150505,0.026123047,-0.027008057,-0.018722534,-0.018341064,0.017608643,-0.014404297,-0.01537323,0.014732361,-0.0039482117,0.018981934,-0.0013418198,0.014251709,-0.009490967,0.02130127,-0.015182495,0.013175964,-0.013450623,-0.012321472,0.03741455,-0.049865723,0.01953125,0.013572693,-0.0072250366,0.008903503,0.025787354,0.046844482,-0.041290283,-0.01436615,0.007873535,0.0064964294,0.03213501,-0.019226074,0.047302246,0.009490967,-0.016845703,0.018493652,-0.014785767,-0.012275696,-0.029937744,-0.0284729,0.0317688,-0.0060768127,0.017547607,-0.019317627,0.0027751923,0.021835327,0.0001654625,0.0049476624,-0.007987976,-0.021728516,-0.029449463,0.009521484,-0.001077652,0.013648987,-0.005962372,0.026748657,0.026901245,0.03353882,0.009216309,-0.0046310425,0.0008621216,0.03062439,-0.016311646,0.00013887882,0.035064697,0.0045394897,0.010299683,0.013664246,0.017120361,-0.04660034,-0.021087646,-0.021362305,-0.020080566,-0.0012960434,-0.018310547,-0.011161804,-0.0007634163,0.007545471,-0.016662598,-0.019897461,-0.00044608116,-0.038024902,-0.023925781,0.0016231537,-0.022720337,0.019577026,0.006362915,0.0056877136,-0.00044250488,-0.0060920715,0.03942871,0.002828598,-0.020080566,0.029205322,0.036102295,0.023071289,-0.027038574,-0.0060272217,-0.013061523,-0.007774353,-0.001411438,-0.03225708,0.0075302124,0.04272461,-0.024017334,0.016143799,0.0065956116,0.026885986,-0.009246826,0.003227234,-0.008010864,0.022720337,-0.0011520386,0.036743164,-0.047088623,0.019897461,0.01234436,0.0010623932,-0.022827148,-0.018005371,-0.028137207,0.014083862,0.0033664703,-0.009735107,0.0491333,0.019180298,0.028533936,-0.024734497,-0.022338867,0.0121154785,-0.027160645,-0.018554688,0.027709961,-0.008506775,-0.004169464,0.010658264,-0.016555786,0.030670166,-0.036010742,0.010940552,0.012626648,0.007434845,-0.0010251999,-0.01713562,-0.004508972,-0.006652832,-0.021331787,0.0018825531,-0.00086021423,0.054138184,0.01701355,0.035247803,0.046081543,0.021331787,0.007347107,-0.041168213,-0.019622803,0.005340576,-0.024673462,0.015205383,-0.014274597,0.058258057,0.033996582,0.008743286,0.029052734,0.039245605,0.03933716,0.00434494,0.014404297,-0.020080566,0.016143799,-0.00299263,0.02355957,-0.008895874,0.0390625,-0.03918457,0.025848389,0.010070801,0.028762817,-0.02722168,0.036865234,0.06707764,0.017105103,-0.016342163,0.037841797,-0.00674057,-0.014762878,-0.0010814667,-0.023132324,0.043823242,0.007675171,0.045013428,0.05633545,0.011207581,-0.007583618,0.020950317,-0.033447266,-0.026397705,0.054229736,0.02722168,-0.014839172,-0.012321472,0.0052490234,0.014930725,-0.048217773,-0.026657104,0.020904541,-0.017089844,-0.0045928955,-0.012207031,-0.009117126,-0.014122009,0.0045166016,0.020568848,0.009155273,-0.0025749207,0.018051147,0.026412964,-0.0045394897,0.033355713,-0.0035362244,0.033050537,-0.0236969,-0.027893066,0.021224976,0.022277832,-0.008491516,-0.013763428,0.02897644,0.0066223145,0.03955078,0.0357666,-0.018798828,0.007247925,0.021148682,0.017410278,-0.0065727234,0.0546875,0.039123535,0.01626587,0.037597656,0.028289795,0.036315918,-0.03451538,0.023025513,0.0040740967,0.009666443,-0.011009216,-0.006259918,0.005847931,-0.009643555,0.027114868,-0.0010223389,-0.012390137,0.019744873,0.024215698,-0.01184082,-0.0057868958,-0.0079422,0.0072250366,-0.02722168,-0.0028305054,0.01763916,-0.021560669,0.04019165,0.01322937,0.025344849,-0.028182983,0.01524353,0.0070648193,-0.024124146,-0.0009551048,0.024673462,-0.03793335,0.0077552795,-0.005672455,-0.0016946793,-0.05065918,0.013298035,0.028625488,-0.018432617,0.026290894,0.008743286,-0.003320694,-0.0072021484,0.01914978,0.006778717,-0.0024852753,-0.006679535,-0.020599365,0.0289917,0.039978027,-0.008842468,-0.003604889,-0.03253174,-0.010620117,0.00944519,-0.01209259,-0.002084732,-0.008529663,-0.018569946,-0.025817871,0.018966675,0.03427124,0.020050049,0.05126953,-0.02558899,-0.014091492,0.012458801,0.03781128,-0.00010794401,-0.0068626404,-0.0059432983,0.022567749,-0.02116394,0.048828125,0.03845215,0.009605408,0.04168701,-0.005458832,-0.013465881,0.0032997131,-0.014984131,0.038116455,-0.019943237,0.0044441223,0.0052948,0.036315918,-0.009117126,-0.029373169,0.011558533,-0.014305115,-0.021575928,-0.020202637,0.015022278,-0.000279665,0.033172607,0.03225708,0.028900146,-0.018661499,0.06036377,-0.0063056946,0.038360596,-0.006881714,-0.011421204,0.055114746,0.019439697,0.03643799,0.021209717,0.015350342,-0.03302002,0.019180298,0.029556274,0.023864746,0.0038776398,0.0154418945,-0.01108551,0.039978027,-0.0022678375,0.033569336,-0.0058250427,0.005065918,0.015808105,-0.0063934326,-0.008049011,-0.00036549568,-0.008354187,0.0057792664,0.046905518,-0.022247314,0.0044517517,-0.024765015,-0.008804321,0.026535034,-0.01802063,0.0026474,-0.0000034570694,-0.023010254,0.00089883804,-0.024429321,-0.026794434,0.007675171,0.029052734,-0.052856445,-0.018417358,0.0040626526,0.019699097,-0.020812988,0.032592773,0.030654907,0.005874634,0.003293991,0.048065186,-0.011734009,0.022354126,-0.016296387,0.029083252,0.034820557,0.0071640015,-0.02456665,-0.0011034012,0.013717651,-0.007183075,0.016281128,0.03289795,-0.0077285767,-0.0044021606,-0.0035820007,-0.005050659,-0.0039405823,0.005378723,-0.018127441,0.0041542053,-0.013946533,-0.017913818,0.0012731552,0.0023059845,-0.006652832,0.0076026917,-0.017044067,-0.021911621,0.013183594,0.034057617,0.023376465,-0.03427124,-0.012466431,-0.00046658516,0.019470215,-0.022506714,-0.014945984,0.004814148,-0.04095459,0.011787415,0.020233154,0.010925293,0.009162903,-0.020629883,0.004840851,0.037475586,0.008895874,0.01914978,0.007865906,-0.009361267,0.017623901,-0.00434494,-0.002122879,-0.004901886,-0.010978699,0.010055542,0.028213501,-0.0043182373,-0.030700684,0.029418945,0.008270264,0.018218994,-0.0069618225,-0.01449585,0.021026611,-0.0066833496,0.000021457672,0.00018274784,0.019073486,-0.015975952,-0.0101623535,-0.008277893,0.034851074,0.056152344,-0.017715454,-0.008323669,0.019836426,0.02116394,0.017196655,0.03869629,0.0020256042,0.042541504,0.018844604,-0.018478394,-0.021621704,0.025375366,-0.004749298,-0.023101807,0.016921997,-0.018859863,-0.026245117,0.010688782,0.0071792603,-0.00022864342,-0.029632568,-0.011192322,-0.013252258,-0.013542175,0.01852417,-0.016281128,0.017807007,-0.023391724,-0.0035820007,0.009880066,-0.020263672,-0.050323486,-0.016143799,0.0087509155,-0.01184845,-0.055847168,0.004070282,-0.027526855,0.00497818,-0.01889038,-0.013442993,-0.020645142,0.014091492,-0.008018494,-0.0113220215,0.005180359,0.022949219,0.023757935,-0.0034122467,0.029937744,-0.024765015,-0.02357483,-0.024902344,0.0016231537,-0.013061523,0.019348145,-0.000016272068,0.03842163,0.024520874,-0.019989014,-0.0027122498,-0.013198853,-0.004447937,-0.016540527,-0.018005371,-0.03010559,0.024429321,0.014602661,-0.007648468,-0.0030021667,0.036224365,-0.021759033,-0.0118255615,0.02986145,0.05166626,0.0053253174,0.02178955,-0.023529053,-0.000019311905,-0.017501831,0.008010864,-0.015258789,0.0013341904,0.022888184,0.0044555664,-0.00049495697,0.011497498,0.024246216,-0.013450623,-0.012268066,0.035736084,0.009460449,-0.010040283,0.04333496,0.014633179,0.0031375885,-0.013328552,-0.0075912476,0.016479492,0.055603027,0.013015747,0.011924744,-0.01335907,0.00774765,-0.012382507,0.010643005,0.022369385,-0.030410767,-0.044769287,-0.01474762,-0.0357666,0.02368164,-0.0022182465,0.012992859,-0.0137786865,0.019561768,-0.025131226,-0.033691406,-0.0206604,0.031036377,0.017044067,-0.015777588,-0.008453369,0.0096206665,0.008979797,-0.033691406,-0.0065460205,-0.03765869,-0.040527344,-0.0053634644,-0.016586304,0.019073486,0.015701294,-0.0073013306,0.0010938644,-0.00039362907,0.0008544922,0.0003066063,0.019943237,-0.0110321045,0.0003862381,0.02557373,0.014968872,-0.014877319,0.015075684,-0.013687134,0.0068359375,0.019226074,-0.016494751,0.023971558,-0.019897461,0.0309906,-0.012916565,0.0038433075,0.029678345,-0.0060768127,0.010772705,-0.02671814,-0.0023422241,-0.0019254684,-0.012382507,0.040161133,-0.022079468,-0.024002075,0.006126404,-0.01663208,-0.023605347,0.0033626556,0.009498596,0.034851074,-0.008308411,0.05532837,-0.0116119385,-0.0037460327,0.018234253,0.010864258,-0.010002136,0.007156372,0.03591919,-0.00035572052,0.012550354,-0.0033168793,-0.0061454773,-0.033691406,-0.005844116,0.012557983,-0.0024929047,-0.015716553,0.026763916,0.0129470825,0.051605225,-0.008880615,0.024780273,0.014587402,0.002986908,0.027114868,0.006164551,0.055541992,0.0015325546,-0.025604248,0.007965088,0.0023059845,-0.028320312,0.009185791,-0.0065345764,0.008392334,-0.04611206,0.016525269,-0.011657715,0.025360107,-0.021530151,0.017868042,-0.022201538,-0.010047913,-0.047180176,-0.0093307495,-0.036071777,0.00957489,0.028137207,0.0027942657,0.033843994,0.00390625,-0.026504517,0.013290405,0.0390625,0.007457733,-0.026931763,-0.02293396,0.015609741,0.0030727386,0.0043907166,0.00907135,-0.02494812,-0.018508911,-0.0017309189,-0.008155823,0.009536743,-0.0064964294,0.024887085,0.020401001,-0.004261017,-0.0064468384,0.028259277,-0.0038967133,-0.0030517578,0.016723633,0.011985779,0.03781128,0.027435303,-0.016784668,0.027633667,0.008735657,-0.043273926,0.064453125,-0.0032482147,0.028549194,-0.023040771,0.0007762909,-0.0340271,-0.027069092,-0.014221191,0.0073661804],"createdAt":"2026-04-18T18:39:37.158Z","updatedAt":"2026-04-24T20:02:15.730Z","lastSeenAt":"2026-04-24T20:02:15.730Z","tsv":"'/api/v1/accounts/4':92 '/request':13,28 '0.02':12,27,74,119,180 '000':108 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':136 '0x8335':113 '20':107 '2913':114 '300':139 '402 payment api' '6':123 'accept':144 'access':98 'accounts-endpoint' 'actual':202 'address':135 'advertis':153 'ai/ml':49 'analysi':157 'analyt':48 'api':5,20,37,79,97 'application/json':149 'base':8,23,67,109,116 'base network api' 'beyond':185 'broad':42 'broader':151 'call':4,19,76 'caller':217 'catalog':43 'challeng':103 'classif':160 'commit':86 'connect':198 'convers':172 'data':47,52,174 'decim':124 'discov':223 'document':184,213 'embed':161 'empti':191 'enabl':36 'endpoint':45,57,90,143,154,209 'equal':118 'essenti':190 'estim':169 'exact':131 'exchang':164 'expect':225 'experi':221 'feed':163 'finance/web3':51 'flat':71 'format':227 'gas':168 'generat':175 'geocod':170 'given':120 'howev':183 'infer':50 'infrastructur':54 'input':226 'json-api' 'key':80 'land':187 'limit':83 'list':94 'low payment fee' 'lowpaymentfee.com':31 'made':127 'micropayment api' 'need':219 'network':9,24,68 'no-api-key' 'offer':40 'openapi':215 'page':188,195 'paid':59 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':125 'per':3,18,61,75 'per-request':60 'platform':6,21,38,152 'point':182 'post':145 'post-method' 'premium':96 'price':162,181 'quot':167 'rate':72,82,165 'request':62,104,146 'request/response':203 'requir':87 'respons':229 'return':100,148 'schema':204 'scheme':132 'second':140 'sentiment':156 'settl':133 'show':197 'span':46 'spec':216 'specif':89 'structur':230 'sub':194 'sub-pag':193 'summar':159 'text':158 'timeout':141 'token':166 'unit':110 'unknown':211 'usdc':15,30,64,112,121 'usdc api' 'usdc-base' 'use':63 'util':55 'valid':171 'via':10,25,128 'wallet':199 'without':212 'x402':11,26,35,102,130 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"eb909f95-32fc-48a9-9774-f4a760f937db","listingId":"9074132b-34ca-433b-a727-57ae2e6d762d","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/accounts/4","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:37.158Z"}],"sources":[{"listingId":"9074132b-34ca-433b-a727-57ae2e6d762d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/4","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:37.158Z","lastSeenAt":"2026-04-24T20:02:15.730Z"}],"details":{"listingId":"9074132b-34ca-433b-a727-57ae2e6d762d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/4 \\\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":"Flat pricing of $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge requests maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/accounts/4"},{"claim":"Platform offers endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium account data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to a multi-category API catalog"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.412Z"},"updatedAt":"2026-04-24T20:02:15.730Z"}}