{"id":"a3039a87-0e03-473e-b8e1-ea8bb73e6f1b","shortId":"hQLaVj","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","description":"lowpaymentfee.com offers a suite of pay-per-request APIs accessible via the x402 payment protocol on the Base network. The endpoint at `/api/v1/payments/102` is labeled \"Premium API Access\" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per call (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — each request is paid individually via the X-PAYMENT header.\n\nThe broader platform advertises four categories of endpoints: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. However, the specific endpoint being listed here (`/api/v1/payments/102`) does not clearly map to any of these named services — its description is simply \"Premium API Access\" with no further documentation on what data or functionality it returns.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no examples of what a successful response looks like. The endpoint is confirmed live (402 challenge captured), but the actual functionality behind this specific path is unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-gateway","payments"],"synonyms":["x402 API","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee","premium API access"],"warnings":["No documentation available — /docs, /pricing, /README all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific endpoint /api/v1/payments/102 does not map to any named service on the landing page","Actual functionality of this endpoint is unknown — 'Premium API Access' is the only description"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/102","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/payments/102","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 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response examples, and the actual functionality behind this specific endpoint path is undocumented. The docs/pricing/README pages are all empty beyond a wallet connect prompt.","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":"2026-04-19T06:38:01.548Z","embedding":[-0.025405884,-0.034362793,0.048980713,0.015655518,0.008560181,-0.035461426,-0.022644043,0.038909912,0.0803833,-0.07513428,0.028045654,-0.051849365,-0.029052734,-0.0413208,-0.03604126,0.013244629,-0.0025596619,0.009811401,-0.037231445,0.030136108,0.026306152,-0.016036987,-0.03652954,0.03475952,-0.003545761,-0.024276733,-0.014091492,-0.010414124,-0.013641357,-0.037261963,0.043762207,-0.026275635,-0.002822876,0.0035114288,-0.0105896,-0.020812988,0.00042700768,0.040130615,0.03149414,-0.008621216,-0.008766174,-0.04574585,-0.0068473816,-0.010932922,-0.062408447,-0.0023517609,0.014656067,-0.018173218,-0.0049819946,0.008277893,-0.043518066,-0.0025691986,-0.011291504,0.0023593903,0.015174866,0.005393982,-0.010696411,-0.012252808,0.0028133392,0.006504059,0.002822876,-0.060546875,-0.022567749,-0.016021729,-0.0010986328,0.055999756,-0.014602661,0.051239014,0.017684937,0.052856445,0.049072266,0.056243896,0.023773193,0.019882202,0.0022354126,-0.0009741783,0.014259338,0.06750488,-0.01777649,-0.01411438,-0.013420105,-0.0029678345,-0.052978516,0.0013666153,-0.01953125,-0.03894043,-0.02067566,0.009864807,-0.016571045,0.026306152,-0.07269287,-0.0034866333,-0.011054993,0.004886627,0.012207031,-0.014144897,-0.021835327,0.021514893,-0.022567749,0.019607544,0.0076065063,-0.04196167,0.010360718,0.01386261,0.048980713,0.048217773,0.022888184,0.024353027,0.012832642,-0.015136719,-0.03463745,0.01448822,-0.013557434,-0.009849548,0.0024051666,0.019210815,-0.023651123,0.0038833618,-0.014541626,0.0072250366,-0.043029785,0.057250977,0.021469116,-0.008888245,0.015357971,-0.044708252,-0.0079956055,0.018096924,-0.026489258,-0.0076942444,0.02142334,0.0129470825,0.039764404,-0.02178955,-0.03756714,0.009315491,-0.009063721,-0.01927185,-0.0513916,-0.047088623,0.03591919,-0.028625488,0.026382446,0.03427124,-0.1038208,-0.021530151,-0.04156494,0.005695343,-0.03866577,-0.008987427,-0.009429932,0.026779175,-0.02218628,-0.010948181,-0.02645874,-0.014312744,0.0038070679,0.036499023,-0.026412964,0.05053711,-0.0053710938,0.023330688,0.027404785,0.019714355,0.031341553,0.02708435,-0.0045394897,-0.080566406,-0.08428955,-0.027252197,-0.0041275024,-0.014152527,-0.039489746,0.010475159,-0.0064468384,-0.07159424,-0.018920898,-0.01272583,-0.0054969788,-0.049194336,-0.0045318604,-0.029815674,0.010673523,-0.013511658,-0.06524658,-0.026611328,-0.029266357,0.06976318,0.021438599,0.02027893,0.037963867,-0.01928711,0.051574707,0.016433716,-0.021011353,-0.028686523,0.019378662,-0.01977539,0.00055360794,0.000005364418,0.0045318604,-0.03656006,0.04296875,0.062347412,0.016571045,-0.020187378,-0.009941101,-0.0592041,-0.04537964,-0.03390503,0.0105896,0.0052986145,0.009399414,0.03475952,-0.027252197,-0.030426025,-0.00089120865,0.015464783,0.019424438,0.061645508,0.023895264,-0.011642456,0.016479492,0.026870728,-0.041748047,0.030715942,0.037506104,0.024932861,-0.03152466,-0.020599365,0.017089844,0.04510498,-0.027694702,0.01802063,-0.01776123,0.021835327,-0.015174866,0.007881165,0.03286743,-0.013648987,-0.022415161,-0.027175903,-0.02670288,0.03213501,0.012252808,-0.016235352,-0.03717041,-0.07421875,0.036590576,0.029403687,0.04055786,-0.012260437,0.013809204,-0.016311646,-0.021255493,-0.07885742,0.053985596,0.07910156,-0.018478394,-0.0056419373,0.016052246,-0.00919342,-0.029586792,-0.0012540817,-0.008041382,-0.03591919,-0.02671814,0.0038471222,-0.046966553,-0.011444092,0.009399414,0.03829956,0.058380127,-0.0005273819,-0.045410156,-0.034362793,-0.010093689,0.000024139881,-0.02142334,0.0042800903,-0.0040397644,-0.0013027191,0.029953003,0.00020384789,0.02758789,0.0006699562,0.0045700073,-0.0013227463,0.0018434525,-0.018310547,-0.032714844,0.013954163,-0.00712204,-0.07312012,0.013664246,-0.006416321,0.06829834,-0.04296875,0.04284668,-0.011734009,0.011833191,0.06097412,-0.011070251,-0.03845215,0.015068054,0.02015686,0.018356323,0.041809082,-0.0000071525574,-0.03338623,-0.012168884,0.068115234,-0.01361084,-0.0112838745,0.0012674332,0.012992859,0.0368042,0.0036354065,-0.05810547,-0.02949524,-0.009666443,-0.032196045,0.018188477,-0.017120361,0.027618408,-0.021102905,-0.00042366982,-0.026351929,-0.004005432,-0.032073975,0.018981934,-0.022949219,0.007156372,-0.009674072,-0.011833191,0.018173218,0.023025513,-0.01108551,0.00737381,0.047698975,0.026245117,-0.00843811,-0.031982422,-0.02482605,-0.02116394,-0.00447464,0.01777649,0.02217102,0.014450073,0.056610107,-0.03756714,0.01637268,0.03237915,0.024749756,0.03878784,-0.001156807,0.013298035,-0.07336426,-0.04547119,-0.03326416,-0.041412354,0.026290894,0.004497528,-0.0034255981,0.055236816,0.007118225,-0.027114868,-0.037353516,0.013069153,-0.03970337,-0.009506226,0.046844482,-0.0030403137,-0.026733398,-0.0024471283,-0.013748169,0.0027236938,0.034942627,0.013679504,0.015914917,0.06707764,0.041778564,-0.0019311905,0.018707275,0.010604858,0.024337769,0.005470276,-0.030899048,-0.017974854,-0.0070381165,0.013946533,-0.0070228577,-0.023086548,-0.06298828,0.04736328,0.03515625,0.070617676,0.00818634,0.009346008,0.03994751,-0.012290955,0.009140015,-0.023635864,-0.022964478,-0.018753052,-0.050750732,0.03704834,-0.014976501,-0.006095886,-0.020431519,0.03466797,-0.0077590942,0.017578125,-0.023269653,0.050842285,-0.010055542,-0.0036678314,0.0259552,0.0029296875,0.05407715,0.05508423,-0.033111572,0.02508545,0.014221191,-0.04776001,0.007499695,0.036499023,-0.024536133,-0.019683838,-0.054718018,-0.030822754,0.017211914,0.004081726,-0.05581665,0.002960205,0.008148193,0.013053894,0.023590088,-0.015975952,-0.024612427,0.0016746521,-0.016723633,-0.05593872,-0.010658264,-0.033294678,0.0044441223,0.03918457,-0.031555176,0.00039434433,0.005634308,-0.00042152405,-0.0012769699,0.018753052,0.025970459,-0.0051956177,-0.04864502,0.025787354,0.013442993,0.0068511963,0.0077667236,0.031799316,0.017120361,0.02281189,0.053497314,0.012535095,-0.021881104,-0.06048584,0.01953125,-0.04953003,0.00017738342,0.010482788,-0.017608643,-0.003932953,-0.016723633,-0.024993896,-0.032348633,-0.005382538,-0.029891968,0.0065307617,0.024978638,-0.017410278,-0.028076172,-0.056671143,-0.01763916,0.0071487427,0.068359375,0.01940918,-0.005672455,-0.059783936,0.00031089783,0.0119018555,0.0105896,0.023544312,-0.015052795,-0.01676941,-0.015571594,-0.035003662,-0.0074691772,-0.021270752,0.016204834,-0.0009012222,-0.012527466,0.033416748,0.008178711,0.024780273,-0.0037899017,0.009391785,0.022659302,-0.02897644,-0.008766174,-0.018508911,0.03955078,-0.0011053085,-0.011230469,-0.04977417,0.045196533,0.014579773,0.03918457,-0.03753662,-0.0057296753,-0.011680603,0.006210327,0.016799927,-0.006793976,-0.011154175,-0.0129852295,-0.052886963,-0.05166626,0.037139893,-0.019012451,0.026977539,0.017837524,0.0033626556,0.008270264,0.0016040802,0.009048462,0.029525757,-0.02218628,-0.0046157837,-0.027999878,-0.035705566,-0.01612854,-0.008079529,-0.009849548,0.025100708,-0.027618408,0.01486969,0.013404846,-0.013916016,0.028686523,0.004169464,-0.0033111572,0.01939392,0.006248474,0.018508911,0.043182373,0.003168106,-0.038482666,0.019104004,0.0033512115,0.007118225,-0.008720398,0.04107666,0.027175903,-0.016433716,0.00049829483,-0.009742737,-0.017684937,-0.01737976,0.000182271,-0.006839752,0.018081665,-0.0069389343,-0.04663086,0.018112183,0.009742737,-0.03289795,-0.019897461,0.019515991,0.008880615,-0.03189087,0.015716553,0.024490356,0.06384277,-0.027542114,0.0058135986,0.009857178,0.027832031,0.034484863,0.013336182,-0.004032135,0.012939453,-0.0041885376,0.014801025,0.0055732727,-0.01197052,0.017547607,0.00030446053,0.023513794,0.02420044,0.010360718,-0.02104187,-0.03414917,-0.005180359,-0.014961243,-0.017791748,0.012290955,0.026733398,0.02204895,-0.020462036,0.0231781,0.019836426,-0.021728516,-0.02217102,-0.008888245,0.03100586,-0.027542114,-0.024047852,0.018753052,0.0074005127,0.042022705,-0.057403564,-0.008071899,0.010856628,0.021835327,-0.026306152,-0.0357666,-0.04397583,0.011894226,0.029708862,0.0151901245,0.030059814,0.036987305,0.005683899,-0.0003902912,0.03326416,0.005340576,-0.0154800415,-0.011169434,-0.042053223,-0.008880615,-0.0012426376,0.0016565323,-0.03866577,0.0118255615,-0.012908936,-0.030456543,0.009307861,-0.016799927,-0.0054130554,-0.010101318,0.010612488,0.032348633,-0.00003105402,0.012199402,-0.020996094,-0.030426025,0.0028381348,0.006275177,0.019454956,-0.054595947,0.012748718,-0.018676758,-0.00434494,-0.0037117004,0.009399414,0.0234375,0.028396606,0.009155273,0.029632568,-0.04550171,0.04272461,-0.036895752,0.01184082,0.0152282715,-0.03781128,-0.0062828064,-0.02406311,-0.013557434,0.047302246,-0.013916016,-0.012489319,-0.03677368,-0.030532837,-0.01486969,-0.054016113,0.019195557,0.041748047,0.043395996,-0.02053833,0.0017547607,-0.0016641617,-0.0011053085,-0.020828247,0.0064430237,-0.010368347,0.017288208,0.022583008,0.01033783,-0.029586792,-0.031311035,-0.02029419,0.0016365051,-0.045166016,-0.04763794,-0.012741089,0.015296936,-0.0030155182,-0.008956909,-0.034576416,-0.031311035,0.0055160522,-0.04940796,0.011756897,0.0076141357,0.023422241,0.011604309,-0.016021729,-0.0020942688,0.01689148,-0.010551453,0.042144775,0.011817932,-0.0062675476,-0.039001465,0.010360718,0.028289795,0.02154541,-0.00573349,-0.00055933,-0.0031661987,-0.013824463,-0.05355835,-0.0072288513,-0.0010385513,-0.0054473877,-0.010658264,0.0040893555,-0.0569458,0.0020561218,-0.018417358,0.00057172775,0.027175903,0.018234253,0.0129852295,-0.0034866333,0.009490967,-0.00037884712,-0.024978638,-0.036346436,0.027801514,0.011062622,0.0045700073,0.02168274,0.04437256,0.011695862,-0.021820068,0.012641907,0.004650116,0.018173218,-0.017990112,0.011146545,-0.019729614,0.006565094,-0.0076942444,-0.02192688,-0.037750244,-0.002128601,0.0949707,-0.0017213821,-0.015281677,-0.013916016,-0.012542725,0.019256592,0.03161621,-0.037322998,-0.005680084,-0.034576416,0.017684937,-0.029159546,0.013244629,0.008323669,0.027069092,-0.019058228,-0.061401367,-0.017074585,-0.0012426376,-0.0154953,-0.06311035,-0.020614624,-0.070373535,-0.010848999,-0.0037441254,-0.022567749,-0.0010356903,0.014144897,-0.01739502,-0.07928467,0.0017194748,0.044433594,0.009971619,0.022888184,-0.014297485,0.019454956,0.020080566,-0.029190063,-0.012367249,0.036865234,-0.032348633,-0.013771057,-0.027359009,0.014343262,-0.018310547,-0.015045166,0.01512146,0.012886047,0.014198303,-0.012260437,-0.0019512177,-0.008926392,0.014289856,-0.017196655,0.0178833,-0.0041389465,-0.015045166,0.0357666,-0.04650879,0.02331543,0.013717651,-0.0032482147,0.009223938,0.031341553,0.040374756,-0.040893555,-0.0084991455,0.022369385,0.015296936,0.048675537,-0.017288208,0.036956787,0.019165039,-0.01499939,0.023803711,0.0004415512,-0.015396118,-0.04888916,-0.01676941,0.024887085,-0.0034599304,0.016616821,-0.013038635,0.005771637,0.014183044,-0.01209259,0.018234253,-0.01285553,-0.023025513,-0.021362305,-0.0016918182,0.00881958,0.0003437996,-0.008613586,0.023590088,0.022979736,0.036956787,0.019378662,-0.0065994263,0.010177612,0.028839111,-0.010215759,0.014152527,0.02330017,0.0013666153,0.012107849,0.018493652,0.0077400208,-0.04473877,-0.008041382,-0.028762817,-0.011550903,0.0032310486,-0.0015802383,-0.017486572,-0.008872986,-0.0016937256,0.0009860992,-0.03314209,0.013298035,-0.02368164,-0.024246216,-0.011352539,-0.010856628,0.018569946,0.005722046,0.008071899,0.02494812,0.0039138794,0.049957275,0.0034866333,-0.004005432,0.03326416,0.03237915,0.01247406,-0.027618408,-0.0005545616,-0.008659363,0.0035552979,0.0003516674,-0.033691406,0.013381958,0.037475586,-0.020080566,0.007888794,0.0011167526,0.020187378,-0.0027599335,0.0032615662,-0.008995056,0.021331787,-0.015197754,0.031555176,-0.042053223,0.010444641,0.01676941,0.005130768,0.0074691772,-0.0053710938,-0.031921387,0.00932312,0.0023498535,-0.0038375854,0.050964355,0.001036644,0.02973938,-0.024917603,-0.016433716,0.004169464,-0.030853271,-0.02229309,0.030899048,-0.007369995,0.0011014938,0.0154953,-0.02949524,0.039855957,-0.02659607,0.02368164,-0.0057029724,-0.0013980865,-0.008384705,-0.020751953,-0.01687622,-0.008384705,-0.017974854,0.0013055801,0.0006322861,0.04284668,0.009933472,0.03668213,0.05126953,0.012016296,-0.0044441223,-0.03552246,-0.035003662,0.0017127991,-0.021438599,0.015411377,-0.010620117,0.053222656,0.040802002,0.00059604645,0.0385437,0.038757324,0.0317688,-0.003042221,0.0030593872,-0.014038086,0.010772705,-0.008636475,0.027435303,-0.0041122437,0.04425049,-0.026321411,0.029373169,0.018478394,0.030426025,-0.031219482,0.03643799,0.062683105,0.020050049,-0.0051574707,0.032287598,-0.00409317,-0.0078125,-0.015914917,-0.017471313,0.061553955,0.016448975,0.06262207,0.054779053,0.012992859,-0.009376526,0.02128601,-0.034057617,-0.022460938,0.07696533,0.014457703,-0.02168274,-0.009376526,-0.005680084,0.0014076233,-0.04925537,-0.03173828,0.025268555,-0.011558533,0.01525116,-0.012084961,-0.004940033,-0.012748718,0.01171875,0.024383545,0.020828247,-0.016036987,0.026123047,0.030593872,0.0038490295,0.023040771,-0.005973816,0.029190063,-0.035308838,-0.023239136,0.00969696,0.018081665,-0.0077056885,-0.005970001,0.023788452,0.0053901672,0.04800415,0.048187256,-0.019485474,0.007648468,0.035369873,0.008415222,-0.003704071,0.057373047,0.034118652,0.019439697,0.0473938,0.036834717,0.029586792,-0.041931152,0.020492554,0.0023345947,-0.0015554428,-0.010894775,-0.011222839,-0.00036382675,-0.015777588,0.023483276,-0.004211426,-0.010559082,0.021438599,0.027908325,-0.0022697449,-0.0054016113,-0.010879517,-0.0004427433,-0.021728516,-0.0050964355,0.011001587,-0.013114929,0.03189087,0.009757996,0.022018433,-0.021347046,0.024490356,-0.010673523,-0.016525269,-0.0012226105,0.025634766,-0.038604736,0.008773804,-0.005683899,0.0063095093,-0.046875,0.018035889,0.029190063,-0.005756378,0.03225708,0.012832642,-0.0021781921,0.007987976,0.01777649,0.00579834,0.0026493073,-0.010192871,-0.026351929,0.03439331,0.041290283,0.004524231,0.017501831,-0.016937256,-0.0020141602,0.014923096,-0.008872986,-0.0069770813,-0.013900757,-0.019683838,-0.030212402,0.005268097,0.0357666,0.017456055,0.042755127,-0.00592041,-0.01876831,0.01524353,0.033203125,0.005722046,0.001958847,-0.006072998,0.020584106,-0.0093688965,0.049957275,0.038970947,0.0039787292,0.029891968,-0.019882202,-0.017807007,0.0075416565,-0.0013017654,0.024307251,-0.013679504,0.0075263977,-0.00995636,0.02067566,-0.022888184,-0.04550171,0.0057258606,-0.01285553,-0.015670776,-0.02923584,0.011695862,-0.0002861023,0.030380249,0.043945312,0.010192871,-0.0309906,0.062347412,-0.015609741,0.05130005,-0.0057678223,-0.012199402,0.05078125,0.03778076,0.037384033,0.018981934,0.02848816,-0.03765869,0.026168823,0.04626465,0.0209198,0.012069702,0.0002667904,-0.01939392,0.0385437,0.003780365,0.022354126,-0.0127334595,-0.00041604042,0.013298035,-0.0020370483,-0.0064888,0.0011615753,-0.0035915375,0.002286911,0.041992188,-0.031829834,-0.019546509,-0.025375366,-0.008384705,0.03314209,-0.009490967,0.0070228577,0.0004749298,-0.028182983,0.014404297,-0.031677246,-0.014076233,0.00055265427,0.03010559,-0.03475952,-0.015686035,0.00086164474,0.007843018,-0.020080566,0.023773193,0.022399902,-0.0072364807,0.012535095,0.048858643,-0.006450653,0.030029297,-0.014656067,0.019165039,0.031066895,-0.00016057491,-0.020385742,-0.0029773712,0.010940552,-0.01586914,0.008140564,0.032958984,-0.016052246,0.0018997192,0.0019187927,-0.016799927,0.008926392,0.0031089783,0.0020484924,-0.00014448166,-0.009239197,-0.008842468,-0.0022125244,0.004924774,-0.005207062,0.010063171,-0.011947632,-0.006877899,0.013214111,0.04067993,0.021438599,-0.043273926,-0.0011940002,0.011550903,0.0056915283,-0.023910522,-0.01828003,-0.00096416473,-0.030197144,0.014045715,0.013435364,0.006439209,0.013809204,-0.019882202,0.0035190582,0.025924683,0.015670776,0.014976501,0.007534027,-0.0033130646,0.014595032,-0.021347046,-0.002193451,-0.004432678,-0.006000519,0.01725769,0.022766113,-0.0035114288,-0.026397705,0.032562256,-0.0034065247,0.020370483,0.0072746277,-0.01737976,0.00920105,-0.01763916,-0.015296936,0.003107071,0.023010254,-0.015151978,-0.019866943,-0.01600647,0.02607727,0.053253174,-0.016082764,-0.010803223,0.023345947,0.0064926147,0.023910522,0.027908325,0.010467529,0.03717041,0.024414062,-0.017959595,-0.02178955,0.015686035,-0.009384155,-0.026153564,0.017562866,-0.015838623,-0.016815186,0.009765625,0.006839752,-0.010009766,-0.025741577,-0.015655518,-0.007686615,-0.022064209,0.019683838,-0.0116119385,0.016204834,-0.028198242,-0.013221741,0.0068740845,-0.020553589,-0.046295166,-0.031204224,-0.00051403046,-0.010147095,-0.05126953,0.013435364,-0.030853271,0.01272583,-0.016723633,0.002670288,-0.008308411,0.029846191,-0.012840271,-0.0065345764,0.005844116,0.024795532,0.017349243,0.01184082,0.024246216,-0.030029297,-0.03677368,-0.022583008,0.0019016266,-0.00907135,0.020187378,0.0024642944,0.036102295,0.022384644,-0.0071754456,0.0010538101,-0.0152282715,-0.003627777,-0.008148193,-0.027282715,-0.019989014,0.021499634,0.010391235,-0.007980347,-0.0065727234,0.04208374,-0.032562256,-0.023254395,0.02468872,0.042419434,0.0054244995,0.03375244,-0.014602661,-0.00712204,-0.0075950623,0.004169464,-0.015640259,0.017532349,0.0058288574,0.0071640015,-0.005973816,-0.0018787384,0.03050232,-0.008026123,-0.007282257,0.026016235,0.00207901,-0.01209259,0.033294678,0.013473511,0.016342163,-0.007381439,-0.0075950623,0.015609741,0.037628174,0.011856079,0.0067863464,-0.00026535988,0.010169983,-0.019363403,0.010406494,0.009506226,-0.016906738,-0.03475952,-0.011146545,-0.032226562,0.0149002075,0.0033473969,0.016082764,-0.009841919,0.017364502,-0.021820068,-0.029022217,-0.014198303,0.019348145,0.014297485,-0.0046691895,-0.014457703,0.0035190582,0.020935059,-0.031066895,-0.0056762695,-0.040252686,-0.04083252,-0.006576538,-0.022872925,0.020874023,0.013969421,-0.00983429,0.0035095215,-0.00043320656,-0.0012769699,0.0039100647,0.029159546,-0.013298035,-0.0079422,0.02368164,0.01158905,-0.026260376,0.0154800415,-0.0041656494,-0.0038700104,0.021026611,-0.014289856,0.006385803,-0.008422852,0.036712646,-0.006198883,-0.0055732727,0.030700684,0.0029239655,0.011878967,-0.03111267,0.005493164,0.0038833618,-0.0026416779,0.035217285,-0.028015137,-0.01852417,0.0023040771,-0.022659302,-0.03250122,0.0067863464,0.021408081,0.038635254,-0.014038086,0.039642334,-0.017501831,-0.013877869,0.019424438,0.01386261,-0.019348145,-0.0036010742,0.031143188,0.016677856,-0.009597778,4.172325e-7,-0.013557434,-0.028808594,-0.0071983337,0.0206604,-0.0075263977,-0.01210022,0.014793396,0.006500244,0.044403076,-0.0020179749,0.015586853,0.0129470825,0.010597229,0.025878906,0.0013427734,0.049560547,0.0012140274,-0.033966064,0.0071372986,-0.0050964355,-0.02607727,-0.010505676,-0.0049209595,0.0012817383,-0.038024902,0.0076408386,-0.0012273788,0.031204224,-0.017181396,0.0053977966,-0.02330017,-0.004421234,-0.035827637,-0.013389587,-0.02709961,0.009552002,0.031555176,0.0020980835,0.020706177,0.0019512177,-0.021316528,0.019378662,0.046661377,-0.016082764,-0.025222778,-0.01576233,0.005870819,-0.002210617,0.017105103,0.0067634583,-0.020202637,-0.019836426,0.0006814003,-0.016647339,0.01109314,-0.0068588257,0.006439209,0.0037441254,-0.0036411285,-0.0047798157,0.023895264,-0.0013237,-0.0029525757,0.0042533875,0.007472992,0.031097412,0.03286743,-0.0060539246,0.018676758,0.022888184,-0.03555298,0.053771973,-0.0009212494,0.02406311,-0.017410278,-0.0011663437,-0.03805542,-0.019042969,-0.008956909,-0.0007920265],"createdAt":"2026-04-18T18:49:28.731Z","updatedAt":"2026-04-23T17:31:47.445Z","lastSeenAt":"2026-04-23T17:31:47.445Z","tsv":"'/api':207 '/api/v1/payments/102':56,172 '/docs':206 '/pricing':208 '/readme':210 '/request':163 '0.02':12,28,87,162 '000':82 '0x8335':72 '20':81 '2913':73 '402':253 '6':92 'Base network API' 'USDC API' 'accept':63 'access':7,23,43,61,189 'actual':258 'advertis':118 'ai':130 'amount':79 'analysi':134 'analyt':124 'api':6,22,42,60,95,188 'base':9,25,51,75,83 'base-network' 'behind':260 'beyond':231 'broader':116 'call':4,20,89 'captur':255 'categori':120 'challeng':234,254 'classif':137 'clear':175 'commit':101 'confirm':251 'connect':216 'content':222 'contract':71 'convers':154 'data':123,127,196 'decim':93 'descript':184 'document':193,201 'embed':138 'endpoint':54,122,158,168,249 'equal':86 'estim':148 'exampl':240 'exchang':143 'export':128 'extrem':203 'feed':142 'financ':139 'four':119 'function':198,259 'gas':147 'generat':155 'geocod':152 'header':114 'howev':165 'individu':108 'infrastructur':150 'insight':129 'key':96 'label':58 'learn':132 'like':247 'limit':98 'list':157,170 'live':252 'look':246 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':131 'map':176 'maximum':78 'metric':125 'micropayment API' 'name':181 'network':52 'no-api-key' 'offer':34 'openapi':226 'outputschema':236 'page':211 'paid':107 'path':263 'pay':2,18,39 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request':38 'payment':47,66,113 'per':3,13,19,29,40,88 'platform':117 'post':64 'post-endpoint' 'premium':5,21,59,187 'premium API access' 'price':141,164 'prompt':218 'protocol':48 'quot':146 'rate':97,144 'render':213 'report':126 'request':14,30,41,65,105 'request/response':229 'requir':103 'respons':245 'return':200 'schema':230 'sentiment':133 'servic':182 'settl':68 'share':159 'simpli':186 'spars':204 'spec':227 'specif':167,262 'stub':237 'substant':221 'success':244 'suit':36 'summar':136 'text':135 'token':145 'unclear':265 'unit':84 'upfront':100 'usdc':16,32,70,90 'usdc-settlement' 'use':91 'util':151 'valid':153 'via':10,26,44,109 'wallet':217 'web3':140 'x':112 'x-payment':111 'x402':11,27,46,233 'x402 API' 'x402-payment'","prices":[{"id":"57359f0b-c129-4a79-8198-2ddb0b7221de","listingId":"a3039a87-0e03-473e-b8e1-ea8bb73e6f1b","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/payments/102","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:49:28.731Z"}],"sources":[{"listingId":"a3039a87-0e03-473e-b8e1-ea8bb73e6f1b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/102","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:49:28.731Z","lastSeenAt":"2026-04-23T17:31:47.445Z"}],"details":{"listingId":"a3039a87-0e03-473e-b8e1-ea8bb73e6f1b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/102 \\\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":"Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/102"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/payments/102"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Four categories of APIs listed: Data & Analytics, AI & ML, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to paid API services without API key management","Agent-driven workflows that need on-demand API calls settled in USDC on Base","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment flows","AI agents that need keyless, pay-per-call API access","Users who want to avoid subscriptions and pay only per request"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Production workloads requiring well-documented request/response schemas","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:09.777Z"},"updatedAt":"2026-04-23T17:31:47.445Z"}}