{"id":"7ac3a345-1147-42f9-8ad4-4d5edb8a03e9","shortId":"5RzN6n","kind":"x402","title":"x402-gated Premium API Access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated Premium API Access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall on the Base network. The specific resource at `/api/v1/charges/159` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is settled on-chain to the payTo address with a 300-second timeout window.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. No API keys, no rate limits, and no minimum commitments are required; access is instant via the x402 payment protocol.\n\nHowever, the specific functionality behind `/api/v1/charges/159` is not documented beyond the label \"Premium API Access.\" There is no OpenAPI schema, no request/response examples, and the docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. Without knowing what this particular charge endpoint actually returns, callers should treat this as an opaque paid endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-method","on-chain-settlement"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation exists for what this endpoint actually returns — the label 'Premium API Access' is the only description available.","Docs, pricing, README, and API pages all render only 'Connect wallet' with no usable content.","No OpenAPI or output schema provided; request body format is unknown.","The broader platform lists many API categories but it is unclear whether /api/v1/charges/159 maps to any of them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/159","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/charges/159","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 of what the endpoint actually returns, no OpenAPI schema, no request/response examples, and the docs pages are empty beyond a wallet-connect prompt. The specific purpose of /api/v1/charges/159 is unknown.","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":"2026-04-19T03:21:10.885Z","embedding":[-0.026992798,-0.029693604,0.034179688,0.02418518,0.024398804,-0.024261475,-0.035186768,0.028671265,0.06951904,-0.074401855,0.028045654,-0.024887085,-0.040802002,-0.032196045,-0.027114868,-0.0028095245,-0.014480591,0.0051498413,-0.051879883,0.05529785,0.030227661,-0.016433716,-0.008407593,0.03805542,0.004371643,-0.023376465,-0.0009689331,-0.027008057,-0.021972656,-0.020950317,0.018157959,-0.02230835,-0.0072402954,0.006362915,-0.0022125244,-0.025009155,-0.02532959,0.04373169,0.03579712,-0.0058135986,0.0006432533,-0.056427002,-0.0074043274,-0.0038986206,-0.04550171,-0.0074501038,0.00919342,-0.028701782,-0.016342163,0.0049362183,-0.028640747,0.0032539368,-0.02645874,-0.0022830963,0.03125,0.015792847,-0.007194519,-0.0030460358,-0.0005106926,0.008201599,-0.0019741058,-0.070373535,-0.01449585,0.010543823,0.0011615753,0.050201416,-0.007843018,0.048797607,0.003353119,0.060150146,0.052581787,0.05218506,0.058898926,0.010520935,0.008621216,-0.009384155,0.011405945,0.058746338,-0.017456055,0.012802124,-0.016738892,-0.00054979324,-0.0579834,-0.01133728,-0.018371582,-0.03427124,-0.020950317,0.014640808,-0.01965332,0.012573242,-0.07104492,0.0034770966,-0.016143799,0.01586914,0.00091934204,0.001748085,-0.019546509,0.026855469,-0.010124207,0.014579773,0.022003174,-0.043426514,0.012649536,0.022872925,0.057128906,0.034423828,0.01864624,0.036071777,-0.013572693,-0.017501831,-0.010597229,0.021026611,-0.026245117,-0.016448975,0.01789856,0.017623901,-0.033172607,0.03604126,-0.025741577,0.015716553,-0.052337646,0.044158936,0.037628174,-0.029281616,0.028244019,-0.042114258,-0.020385742,0.0069465637,-0.030654907,-0.017028809,0.028289795,0.0025367737,0.038604736,-0.026779175,-0.012168884,0.0027599335,-0.0060577393,-0.029281616,-0.053588867,-0.032836914,0.041137695,-0.032562256,0.03225708,0.038238525,-0.103759766,-0.0024547577,-0.053985596,0.0033493042,-0.04348755,-0.016586304,-0.013366699,0.022827148,-0.02166748,-0.021408081,-0.0032539368,-0.015098572,0.0004749298,0.02810669,-0.022323608,0.03656006,-0.019851685,0.031082153,0.003955841,0.002292633,0.036315918,0.026260376,-0.009765625,-0.08258057,-0.0892334,-0.031585693,-0.017196655,-0.006843567,-0.04989624,-0.023345947,0.0009851456,-0.0871582,-0.03781128,-0.013145447,0.0013933182,-0.027832031,-0.00818634,-0.024673462,0.0048561096,-0.012207031,-0.06921387,-0.0209198,-0.017211914,0.08093262,0.018341064,0.018493652,0.022842407,-0.012756348,0.061920166,0.018371582,-0.02796936,-0.029052734,0.03012085,-0.009254456,0.027832031,-0.00055122375,0.0065231323,-0.04248047,0.05206299,0.053222656,0.015113831,-0.013931274,0.01625061,-0.048065186,-0.022888184,-0.035308838,-0.007369995,0.01146698,-0.011100769,0.029586792,-0.038024902,-0.034576416,-0.0021781921,0.003835678,0.015571594,0.045135498,0.010482788,-0.0058784485,-0.009811401,0.016357422,-0.032287598,0.030792236,0.022155762,0.016677856,-0.026290894,-0.014816284,0.026824951,0.03173828,-0.040893555,-0.0032577515,-0.014633179,0.014831543,0.011230469,0.013076782,0.04208374,-0.013999939,-0.03817749,-0.027145386,0.0006160736,0.020446777,0.0044288635,-0.035491943,-0.05206299,-0.088134766,0.052459717,0.04522705,0.03161621,0.006729126,-0.006275177,-0.021575928,-0.014762878,-0.06695557,0.05783081,0.08337402,-0.0069274902,-0.010009766,0.01637268,-0.014015198,-0.029052734,-0.027175903,0.008308411,-0.019943237,-0.024276733,0.013702393,-0.04486084,0.012557983,0.011169434,0.024429321,0.06518555,-0.011047363,-0.055786133,-0.027923584,0.0056762695,-0.0008263588,-0.0104522705,0.0005288124,-0.012573242,0.00085163116,0.031082153,0.0053901672,0.029846191,0.008422852,0.02368164,-0.009132385,-0.010360718,-0.023162842,-0.015960693,0.011833191,-0.011650085,-0.07537842,0.02015686,0.006000519,0.052978516,-0.04260254,0.04171753,-0.008773804,0.0017213821,0.0541687,-0.005252838,-0.04751587,0.0107040405,0.031555176,0.043640137,0.028030396,0.009689331,-0.02319336,-0.011672974,0.05606079,-0.016296387,-0.013511658,-0.00082969666,0.017059326,0.027938843,0.016860962,-0.07244873,-0.03543091,-0.0073776245,-0.029067993,0.030090332,-0.044036865,0.027328491,-0.020446777,0.015556335,-0.015357971,0.0038089752,-0.042053223,0.019042969,-0.015197754,0.009788513,-0.02796936,-0.016220093,0.02243042,0.013679504,-0.015098572,0.0016908646,0.03201294,0.03552246,-0.012702942,-0.029418945,-0.0042648315,-0.020904541,0.010665894,0.028213501,0.02558899,0.026763916,0.03552246,-0.034362793,0.03451538,0.035736084,0.00029444695,0.039916992,-0.01928711,0.024017334,-0.055419922,-0.0519104,-0.020645142,-0.038116455,0.037353516,0.0134887695,0.0064582825,0.04119873,0.0033454895,-0.013183594,-0.014533997,0.028747559,-0.057006836,0.011459351,0.02973938,0.0051193237,-0.03768921,-0.01713562,0.000852108,0.011550903,0.028457642,0.0053710938,0.004837036,0.05331421,0.03616333,-0.0008382797,0.020965576,0.024139404,0.028274536,-0.005569458,-0.032287598,-0.02130127,-0.0028877258,0.01864624,-0.022155762,-0.02230835,-0.06274414,0.030288696,0.032989502,0.08074951,0.021606445,0.0020046234,0.03338623,0.0006928444,0.000025331974,-0.035491943,-0.022445679,-0.025238037,-0.038970947,0.027832031,-0.02229309,-0.0072746277,-0.028961182,0.042175293,0.015731812,0.0102005005,-0.022842407,0.06213379,0.009101868,-0.010055542,0.014968872,0.01210022,0.03137207,0.051818848,-0.048217773,0.023727417,0.01272583,-0.040130615,-0.0029239655,0.048797607,-0.0039482117,-0.026168823,-0.068725586,-0.030792236,0.0057907104,-0.014953613,-0.07489014,0.005756378,0.016586304,0.021636963,0.0063095093,-0.007221222,-0.032409668,0.00016736984,-0.023773193,-0.055236816,-0.0047187805,-0.03314209,0.0027275085,0.04067993,-0.02848816,-0.008148193,-0.0028705597,0.0033664703,0.00806427,0.009902954,0.0012454987,-0.00712204,-0.05001831,0.024597168,0.013252258,0.003364563,0.018722534,0.03665161,0.032684326,0.017959595,0.04937744,0.0022068024,-0.019622803,-0.052490234,0.026947021,-0.035614014,-0.0025234222,0.0052337646,-0.00667572,-0.008407593,-0.015220642,-0.016571045,-0.022598267,-0.00039196014,-0.028076172,0.014282227,0.01701355,-0.032684326,-0.01638794,-0.05114746,-0.017974854,-0.00680542,0.079589844,0.03274536,-0.011436462,-0.057922363,-0.024642944,0.037261963,0.0041160583,0.008384705,-0.015731812,-0.022735596,-0.0008993149,-0.05697632,-0.015037537,-0.015731812,0.022735596,0.0058021545,-0.021408081,0.019134521,-0.014587402,0.004962921,-0.015823364,0.00818634,0.043670654,-0.03137207,-0.00008261204,-0.03543091,0.016113281,0.0010356903,-0.012451172,-0.042633057,0.03955078,0.008522034,0.030441284,-0.026748657,-0.00061655045,0.0017547607,0.014564514,0.026473999,-0.014335632,-0.013366699,0.0058021545,-0.039794922,-0.057891846,0.032836914,-0.02670288,0.020980835,0.0044555664,0.010124207,0.026901245,-0.010887146,0.017929077,0.01828003,-0.028381348,-0.00466156,-0.019088745,-0.035247803,-0.007911682,0.0052986145,-0.0104522705,0.012557983,-0.016586304,0.01890564,-0.0021305084,-0.019897461,0.03387451,0.009475708,-0.0038757324,0.03353882,-0.0010032654,0.022766113,0.04876709,0.009651184,-0.02482605,0.019454956,-0.0065689087,0.0069274902,-0.020599365,0.048461914,0.025848389,-0.01612854,-0.0027637482,-0.011543274,-0.013221741,-0.024841309,-0.019866943,0.015342712,0.038482666,0.0040245056,-0.039276123,0.032714844,0.022262573,-0.028320312,-0.001537323,0.025741577,0.020996094,-0.029052734,0.039001465,0.02848816,0.05545044,-0.017456055,0.0038757324,0.021026611,0.029067993,0.025268555,0.021316528,-0.013519287,0.018218994,-0.011985779,0.009819031,-0.004501343,0.00012862682,0.014160156,-0.0057907104,0.024230957,0.018875122,0.021133423,-0.018798828,-0.02923584,0.022598267,0.0018692017,-0.008644104,0.015556335,0.006504059,0.011436462,-0.020233154,0.022735596,0.021835327,-0.040222168,-0.027435303,-0.0028648376,0.04244995,-0.02482605,-0.0073280334,0.021530151,0.0072746277,0.046447754,-0.05657959,-0.0010938644,0.009231567,0.018493652,-0.017990112,-0.042877197,-0.034332275,0.015792847,0.02230835,0.00712204,0.004425049,0.03543091,0.000057578087,0.0068626404,0.022323608,0.006729126,-0.018356323,-0.005268097,-0.046875,-0.004611969,-0.013748169,-0.001414299,-0.026870728,0.0149002075,-0.02684021,-0.03540039,0.0093307495,-0.015792847,-0.0058937073,0.00071144104,0.022857666,0.037231445,-0.0039787292,0.0041007996,-0.0154800415,-0.017486572,0.013183594,-0.013031006,0.030334473,-0.03829956,0.006477356,-0.016113281,0.010261536,-0.0027332306,0.002128601,0.01777649,0.01927185,-0.00970459,0.030654907,-0.029205322,0.04458618,-0.031219482,0.012313843,0.0015277863,-0.045928955,-0.0018005371,-0.030303955,-0.017868042,0.03692627,-0.006954193,-0.007160187,-0.0181427,-0.021255493,0.0019216537,-0.04776001,0.0127334595,0.02053833,0.03616333,-0.028564453,-0.0020484924,0.012084961,-0.0107421875,-0.0134887695,0.0013809204,-0.023590088,0.012329102,0.010444641,0.017196655,-0.015914917,-0.025802612,-0.019836426,-0.0019226074,-0.056640625,-0.041870117,-0.021636963,0.019348145,-0.009437561,-0.0052986145,-0.020248413,-0.009819031,0.0022792816,-0.03765869,0.019348145,0.010681152,0.02734375,0.008529663,-0.010749817,-0.0024204254,0.015533447,-0.016937256,0.039001465,0.0041503906,-0.012466431,-0.031143188,-0.006790161,0.028533936,0.025680542,-0.0032234192,-0.009864807,-0.009841919,-0.024368286,-0.044952393,-0.006008148,-0.0067481995,-0.0035438538,0.0056648254,0.0044784546,-0.047607422,-0.014175415,-0.02734375,0.0049858093,0.02520752,0.009796143,0.016448975,-0.011047363,-0.00021910667,-0.0099105835,-0.015380859,-0.04144287,0.023910522,0.011306763,0.0059928894,0.00058174133,0.032928467,0.0025844574,-0.0074424744,-0.0031871796,0.0009293556,0.013122559,-0.03933716,0.019226074,-0.012954712,0.010513306,-0.020950317,-0.009521484,-0.039916992,-0.0062828064,0.07208252,0.001335144,-0.0058898926,-0.0017786026,-0.0053863525,0.016693115,0.009346008,-0.05227661,-0.010643005,-0.03945923,0.021743774,-0.027130127,0.02355957,0.002275467,0.005176544,-0.037384033,-0.0625,-0.003255844,0.026016235,-0.021438599,-0.05593872,-0.009346008,-0.05706787,-0.014427185,0.00217247,-0.018936157,0.0011844635,0.01146698,-0.014793396,-0.08026123,0.008728027,0.045654297,0.008605957,0.019424438,-0.019515991,0.018569946,0.02029419,-0.014022827,-0.014022827,0.030151367,-0.019088745,-0.013206482,-0.011512756,0.016036987,-0.016860962,-0.029373169,0.028945923,0.013389587,0.009857178,-0.008384705,0.010314941,-0.024856567,0.00198555,0.005126953,0.021728516,-0.0060157776,-0.00007271767,0.024261475,-0.04260254,0.029510498,0.016723633,0.010635376,-0.0044059753,0.015640259,0.036743164,-0.043884277,-0.0058059692,0.04220581,0.000009953976,0.044525146,-0.03945923,0.038970947,0.032592773,-0.011550903,0.021484375,-0.012130737,-0.03250122,-0.0435791,-0.030899048,0.021774292,0.01675415,0.016952515,-0.008300781,0.00932312,0.0029678345,-0.020385742,0.0021762848,-0.015930176,-0.015380859,-0.0011978149,0.014472961,-0.006427765,0.0019044876,-0.006462097,0.021392822,0.010726929,0.046905518,-0.00040745735,0.004558563,0.010620117,0.022857666,-0.016159058,0.0118255615,0.013572693,0.013458252,0.026031494,0.01499176,0.018096924,-0.03366089,-0.016616821,-0.01348114,0.008522034,0.003660202,-0.0024967194,-0.0046844482,0.00034165382,-0.0016059875,-0.0011491776,-0.035064697,0.016998291,-0.02859497,-0.017990112,-0.0045204163,-0.014549255,0.008018494,0.0078048706,0.0061950684,0.020462036,0.004322052,0.062072754,-0.0027885437,-0.00013971329,0.011276245,0.03390503,0.013748169,-0.03540039,-0.015945435,-0.003921509,-0.0039405823,0.0012598038,-0.022857666,0.02279663,0.047943115,0.000500679,0.018417358,-0.018936157,0.023132324,0.003730774,0.019729614,-0.01473999,0.009918213,-0.014427185,0.027297974,-0.03768921,0.011665344,0.02659607,0.004989624,-0.0032196045,-0.02116394,-0.02923584,0.022994995,0.01751709,-0.0046310425,0.05444336,-0.01727295,0.024642944,-0.022903442,-0.0067443848,0.017807007,-0.027709961,-0.016311646,0.04147339,-0.0020389557,-0.003540039,0.012496948,-0.023910522,0.024276733,-0.021118164,0.018325806,-0.011047363,-0.0045814514,-0.0079574585,-0.016860962,-0.029022217,-0.00881958,-0.015686035,0.0058784485,0.009315491,0.037902832,0.021713257,0.030548096,0.03881836,0.015960693,0.014053345,-0.040863037,-0.02381897,-0.0056648254,-0.03878784,0.01234436,-0.014175415,0.04244995,0.04724121,0.0027275085,0.034942627,0.0440979,0.027252197,0.0005044937,0.017181396,-0.023345947,0.019744873,-0.004146576,0.035827637,0.007610321,0.038116455,-0.016921997,0.012802124,-0.004032135,0.033447266,-0.03265381,0.0155181885,0.076660156,0.026687622,-0.002790451,0.042388916,0.0016775131,-0.012557983,-0.01424408,-0.008049011,0.07055664,0.019882202,0.047088623,0.051818848,0.020736694,-0.01953125,0.027496338,-0.025924683,-0.038208008,0.071899414,0.02128601,-0.029388428,-0.014579773,-0.012901306,0.011108398,-0.05279541,-0.02748108,0.008636475,0.0016126633,0.016998291,-0.012794495,-0.0090408325,-0.011192322,0.024932861,0.0143585205,0.009757996,-0.016815186,0.0074043274,0.022247314,0.019638062,0.017715454,-0.002046585,0.024337769,-0.01940918,-0.00970459,-0.0047569275,0.020355225,-0.014091492,-0.0063209534,0.029159546,0.011245728,0.049346924,0.039245605,-0.0056114197,0.003332138,0.024810791,0.02519226,-0.0073623657,0.041229248,0.04837036,0.012710571,0.033813477,0.046417236,0.0256958,-0.033172607,0.018081665,-0.0064048767,0.014968872,0.005847931,-0.008010864,0.014923096,-0.004470825,0.017608643,0.0065345764,-0.014472961,0.024353027,0.03540039,0.0030403137,-0.004486084,-0.009246826,0.0007710457,-0.008804321,0.010543823,0.009063721,-0.021408081,0.012702942,0.012176514,0.026443481,-0.034301758,0.017959595,-0.004322052,-0.03463745,-0.008293152,0.0049476624,-0.0385437,0.0009083748,-0.0023288727,-0.00023150444,-0.03555298,0.0036888123,0.026931763,-0.012863159,0.02645874,0.009185791,-0.0043411255,0.0058021545,0.013809204,0.0063476562,-0.008628845,-0.021652222,-0.015075684,0.039642334,0.049591064,-0.00031876564,0.013504028,-0.020523071,-0.01184845,0.009468079,-0.0025024414,-0.0048103333,0.003189087,-0.010887146,-0.02470398,0.012619019,0.036315918,0.019485474,0.026382446,-0.004486084,-0.030181885,0.0007824898,0.024551392,0.007926941,-0.003627777,-0.018173218,0.027267456,0.005432129,0.047668457,0.025909424,0.0012893677,0.030395508,-0.017623901,-0.013839722,0.010681152,-0.022109985,0.023605347,-0.018753052,0.007335663,-0.024002075,0.018325806,-0.021636963,-0.03265381,0.0087509155,-0.025131226,-0.010978699,-0.027145386,-0.0063819885,0.009933472,0.014526367,0.035003662,0.013122559,-0.02015686,0.07336426,-0.009742737,0.059326172,-0.012924194,0.0034599304,0.054656982,0.04598999,0.035095215,0.021026611,0.00047659874,-0.026916504,0.0042381287,0.051483154,0.029937744,-0.00017750263,0.0074157715,0.0043563843,0.034179688,0.00081920624,0.02217102,-0.023254395,-0.008995056,-0.002357483,-0.0079956055,-0.010032654,0.0038452148,-0.0030765533,0.01953125,0.050994873,-0.031219482,-0.0043296814,-0.02947998,-0.009117126,0.032165527,-0.0040016174,-0.0037174225,0.00063323975,-0.013458252,0.012252808,-0.02772522,-0.015609741,0.008766174,0.02520752,-0.045562744,-0.022842407,0.0046157837,0.011985779,-0.018829346,0.023803711,0.019500732,-0.005710602,0.009490967,0.047821045,-0.010925293,0.047546387,0.0027332306,0.025253296,0.026672363,0.006252289,-0.023544312,0.0016841888,0.0044670105,-0.0132369995,0.0008969307,0.044067383,-0.004398346,0.013008118,-0.010307312,-0.017181396,0.009315491,0.009155273,-0.015975952,0.0025691986,-0.003982544,-0.0134887695,0.009475708,0.0036239624,0.004890442,0.0072288513,-0.01574707,-0.0018453598,-0.004322052,0.030929565,0.01927185,-0.05316162,-0.0029354095,0.013542175,0.010223389,-0.028778076,-0.027435303,-0.01676941,-0.025466919,0.020217896,0.015129089,0.009178162,0.012283325,-0.024398804,-0.0012044907,0.033325195,0.0044937134,0.01713562,0.008934021,-0.012512207,0.009262085,-0.014953613,0.000049889088,-0.001830101,-0.005832672,0.008125305,-0.0028476715,-0.005256653,-0.027236938,0.02923584,-0.010604858,0.019622803,0.007598877,-0.006122589,0.018051147,-0.0071525574,-0.020004272,0.016113281,0.021072388,-0.012176514,-0.017440796,-0.03060913,0.022659302,0.051849365,-0.0022506714,-0.0033740997,0.01600647,0.017196655,0.020706177,0.036010742,0.02746582,0.038116455,0.02368164,-0.007457733,-0.0078048706,0.024902344,-0.011314392,-0.03253174,0.027297974,-0.012557983,-0.0126953125,0.024398804,0.016204834,-0.008384705,-0.015792847,-0.018829346,-0.015487671,-0.01902771,0.019836426,-0.023483276,0.019058228,-0.027359009,-0.011505127,0.003107071,-0.020904541,-0.04486084,-0.025558472,-0.0051956177,-0.016555786,-0.05142212,0.008346558,-0.035858154,0.018630981,-0.02355957,-0.012496948,-0.0098724365,0.031799316,-0.011367798,0.0014438629,0.008125305,0.027618408,0.0049209595,0.025039673,0.017486572,-0.022567749,-0.034179688,-0.015945435,-0.0049819946,-0.015556335,0.016921997,0.0027389526,0.034362793,0.0134887695,-0.015533447,-0.00030612946,-0.011512756,0.0041999817,0.0008993149,-0.044555664,-0.018066406,0.0058937073,0.035614014,-0.01222229,-0.007843018,0.038116455,-0.02319336,-0.013725281,0.027038574,0.048217773,0.0068855286,0.01939392,-0.020553589,0.00014710426,-0.013908386,-0.005268097,-0.008102417,-0.002960205,0.012550354,-0.00082063675,0.00008100271,0.0014743805,0.016799927,-0.015716553,-0.012893677,0.023925781,0.0014429092,-0.026641846,0.038879395,0.011947632,0.006542206,-0.00020599365,-0.017486572,0.02633667,0.03955078,0.018585205,0.0049591064,0.003446579,0.0067710876,0.0008816719,0.017105103,0.026626587,-0.016098022,-0.037017822,-0.023880005,-0.02230835,0.010231018,0.010734558,0.024291992,0.0045928955,0.012580872,-0.027252197,-0.023544312,-0.026672363,0.026672363,-0.009490967,-0.014724731,-0.015945435,0.0019378662,0.030395508,-0.03100586,0.0058937073,-0.02947998,-0.017120361,-0.0099105835,-0.017456055,0.024795532,0.011917114,-0.0013999939,0.004638672,-0.001613617,-0.01689148,-0.0051651,0.03439331,-0.02571106,0.001578331,0.019104004,0.013664246,-0.030685425,0.0052986145,-0.002111435,-0.016494751,0.018341064,-0.012481689,0.017089844,-0.014053345,0.034301758,0.019699097,-0.00033807755,0.037384033,-0.010650635,0.014213562,-0.02381897,-0.0055732727,0.005241394,-0.0048942566,0.04043579,-0.008735657,-0.016204834,0.01676941,-0.02859497,-0.039245605,0.0025806427,0.020767212,0.042663574,-0.011695862,0.035736084,-0.019256592,-0.020370483,0.005092621,0.018234253,-0.012542725,-0.00008201599,0.03062439,0.014816284,-0.0065612793,-0.0026893616,-0.015670776,-0.03567505,-0.016036987,0.01852417,-0.011940002,-0.010749817,-0.00061130524,0.008575439,0.046905518,0.008514404,0.020004272,0.028701782,0.0012159348,0.035949707,0.0016679764,0.04663086,-0.009895325,-0.034942627,0.0031337738,-0.0036582947,-0.014160156,-0.016281128,-0.007545471,0.005844116,-0.034729004,0.01108551,-0.010559082,0.046325684,-0.02458191,0.00844574,-0.025604248,0.00051259995,-0.026138306,-0.011657715,-0.03604126,0.021759033,0.029953003,0.0025100708,0.0056915283,0.0073776245,-0.02053833,0.02330017,0.047912598,-0.0231781,-0.028396606,-0.005947113,0.019836426,0.0023536682,0.001499176,0.019927979,-0.011047363,-0.0076560974,0.0052223206,-0.024887085,0.0041503906,-0.00793457,0.0124435425,0.009315491,-0.0050239563,-0.008026123,0.026367188,0.012969971,-0.0033226013,-0.00036621094,0.00381279,0.039520264,0.030654907,-0.018234253,0.023208618,0.026855469,-0.031402588,0.05404663,-0.012138367,0.019760132,-0.013999939,0.004497528,-0.025970459,-0.009635925,0.00038027763,0.009170532],"createdAt":"2026-04-18T18:44:26.057Z","updatedAt":"2026-04-24T04:03:33.114Z","lastSeenAt":"2026-04-24T04:03:33.114Z","tsv":"'/api/v1/charges/159':49,169 '0.02':10,24,69,141 '000':58 '0x8335':63 '20':57 '2913':64 '300':88 '6':74 'Base network API' 'USDC micropayment endpoint' 'accept':50 'access':6,20,36,156,178 'actual':212 'address':85 'advertis':96 'ai':113 'analysi':116 'analyt':107 'api':5,19,35,104,145,177 'base':8,22,43,59,66 'behind':37,168 'beyond':173 'broader':93 'call':71 'caller':214 'chain':81 'charg':54,210 'classif':119 'commit':153 'connect':198 'content':204 'convers':136 'crypto-paid API' 'data':106,110 'decim':75 'doc':189 'document':172,225 'embed':120 'endpoint':30,211,222 'equal':68 'estim':130 'exampl':186 'exchang':125 'export':111 'feed':124 'financ':121 'function':167 'gas':129 'gate':3,17 'generat':137 'geocod':134 'howev':164 'infrastructur':132 'insight':112 'instant':158 'key':146 'know':206 'label':175 'limit':149 'lowpaymentfee' 'lowpaymentfee.com':32,94 'metric':108 'minimum':152 'ml':114 'network':44 'on-chain':79 'on-chain-settlement' 'opaqu':220 'openapi':182 'page':193 'paid':221 'particular':209 'pay':9,23,101 'pay-per-call API' 'pay-per-request':100 'payment':76,162 'payto':84 'paywal':40 'per':11,25,70,102,142 'platform':95 'post':51 'post-method' 'premium':4,18,34,176 'premium API access' 'price':123,139,190 'prompt':200 'protocol':163 'provid':33 'quot':128 'rate':126,148 'readm':192 'render':195 'report':109 'request':12,26,52,103,143 'request/response':185 'requir':155 'resourc':47 'return':213 'schema':183 'second':89 'sentiment':115 'settl':78 'span':105 'specif':46,166 'suit':98 'summar':118 'surfac':226 'text':117 'timeout':90 'token':127 'treat':216 'unit':60 'usdc':14,28,62,72 'usdc-base' 'use':73 'util':133 'valid':135 'via':159 'wallet':199 'web3':122 'window':91 'without':205 'x402':2,16,39,161 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"c5627a92-3650-46ab-810d-59e6d76df8b5","listingId":"7ac3a345-1147-42f9-8ad4-4d5edb8a03e9","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/charges/159","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:26.057Z"}],"sources":[{"listingId":"7ac3a345-1147-42f9-8ad4-4d5edb8a03e9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/159","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:26.057Z","lastSeenAt":"2026-04-24T04:03:33.114Z"}],"details":{"listingId":"7ac3a345-1147-42f9-8ad4-4d5edb8a03e9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/159 \\\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":"The endpoint returns HTTP 402 with x402 version 1 challenge requiring USDC payment on Base","source_url":"https://lowpaymentfee.com/api/v1/charges/159"},{"claim":"maxAmountRequired is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/charges/159"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, README, and API pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-request for API access without needing API keys or subscriptions","Programmatic agent-driven access to a paid endpoint using x402 USDC payments on Base","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers exploring x402 payment protocol integration","Agents that need keyless, pay-as-you-go API access on Base","Low-cost per-call API consumption without rate limits"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","Anyone looking for a specific, well-documented API capability (the actual response payload is undocumented)","High-volume use cases where $0.02/request adds up without clear value"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:24.419Z"},"updatedAt":"2026-04-24T04:03:33.114Z"}}