{"id":"c9b2d290-677b-4982-adbf-f2f3525dff9d","shortId":"aTbXAg","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/charges/132` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nThe broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request.\n\nHowever, the specific endpoint `/api/v1/charges/132` does not clearly map to any of the named API categories on the landing page. There is no OpenAPI schema, no detailed documentation, and no example request/response bodies available from the crawled pages. The docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no additional content. As a result, the actual functionality behind this particular endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","crypto-payments"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","402 payment protocol","crypto API access"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The specific endpoint /api/v1/charges/132 does not correspond to any named API on the landing page — its actual functionality is unknown","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content","No example request or response bodies are available to verify what this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/132","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/132","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 no OpenAPI schema, no documentation, no example requests or responses, and the specific function of /api/v1/charges/132 is not explained anywhere in the crawled material. The docs pages are 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":"2026-04-19T03:15:34.468Z","embedding":[-0.021255493,-0.040405273,0.032287598,0.01889038,0.015686035,-0.02909851,-0.021713257,0.010894775,0.06970215,-0.06530762,0.029403687,-0.040405273,-0.044921875,-0.019729614,-0.022628784,0.004173279,0.004169464,0.00017893314,-0.031951904,0.033691406,0.03366089,-0.021453857,-0.02482605,0.026245117,0.002193451,-0.007865906,0.003818512,-0.0119018555,-0.029022217,-0.034057617,0.028274536,-0.022232056,-0.016342163,0.0017681122,-0.008781433,-0.021865845,-0.009269714,0.028701782,0.02305603,0.01084137,0.00082063675,-0.056884766,0.008964539,-0.014678955,-0.061157227,-0.010971069,0.0073394775,-0.017837524,0.007247925,-0.002779007,-0.031341553,-0.0040779114,-0.014755249,0.0068969727,0.010932922,0.015419006,0.001285553,-0.0040397644,0.007358551,0.026947021,-0.0015363693,-0.070129395,-0.019226074,-0.0036792755,0.0022087097,0.058502197,-0.009918213,0.035308838,0.0005059242,0.071899414,0.026428223,0.051239014,0.03741455,0.008377075,-0.0032863617,-0.01071167,-0.007598877,0.04360962,-0.017822266,-0.016540527,-0.016647339,-0.008956909,-0.05227661,-0.008308411,-0.025283813,-0.04284668,-0.02067566,0.025619507,-0.012687683,0.014533997,-0.06945801,0.00012087822,-0.015853882,-0.011413574,0.0037899017,-0.006916046,-0.006996155,0.026367188,-0.002746582,0.008659363,-0.0039482117,-0.047058105,0.014312744,0.018661499,0.033325195,0.040130615,0.030319214,0.027908325,-0.0011787415,-0.0032215118,-0.023376465,0.020950317,-0.023635864,-0.017150879,0.0115356445,0.001080513,-0.0047912598,0.017791748,-0.03652954,0.021347046,-0.053009033,0.04699707,0.019699097,0.00046110153,0.012077332,-0.040924072,-0.015083313,0.021377563,-0.0362854,-0.0112838745,0.024719238,0.012031555,0.01727295,-0.020339966,-0.023849487,0.0082473755,-0.024108887,-0.015914917,-0.05419922,-0.025650024,0.042236328,-0.025939941,0.024642944,0.046173096,-0.10870361,-0.0032997131,-0.036102295,0.008987427,-0.034698486,-0.013160706,0.0027885437,0.032592773,-0.0077400208,-0.01777649,-0.028289795,-0.028213501,0.00018000603,0.028945923,-0.016448975,0.043426514,-0.015853882,0.023284912,0.014793396,0.0022506714,0.010520935,0.02029419,-0.010643005,-0.074645996,-0.08050537,-0.026870728,-0.018508911,-0.026947021,-0.024459839,0.005622864,-0.0023841858,-0.06732178,-0.018081665,-0.020401001,0.003145218,-0.037963867,-0.00039744377,-0.032714844,0.01689148,-0.0065460205,-0.06854248,-0.013534546,-0.015731812,0.05871582,0.030700684,0.027954102,0.01499176,-0.01876831,0.061462402,0.027877808,-0.025726318,-0.018478394,0.027389526,-0.015777588,0.018844604,-0.00856781,0.0074043274,-0.03778076,0.045318604,0.064208984,0.009284973,-0.020050049,-0.010215759,-0.06439209,-0.042938232,-0.029052734,0.01676941,0.007320404,-0.0043258667,0.03451538,-0.03857422,-0.03692627,0.0024089813,0.01600647,0.0074768066,0.05130005,0.015106201,-0.0077667236,0.02293396,0.021972656,-0.05960083,0.03842163,0.02810669,0.0033817291,-0.014434814,-0.02508545,0.027359009,0.03591919,-0.029724121,0.008956909,-0.028244019,0.015823364,0.0045433044,-0.0044784546,0.01939392,-0.014198303,-0.025939941,-0.022521973,-0.025543213,0.0236969,0.008178711,-0.03616333,-0.035491943,-0.07507324,0.05508423,0.026763916,0.03878784,0.008842468,0.013511658,-0.015510559,-0.0113220215,-0.05960083,0.06585693,0.07550049,0.005104065,-0.023742676,0.024459839,-0.00522995,-0.028320312,0.0119018555,-0.022201538,-0.04220581,-0.03253174,0.015289307,-0.04824829,-0.003019333,0.029922485,0.024215698,0.05581665,-0.008483887,-0.053771973,-0.01979065,-0.012451172,-0.00072813034,-0.01386261,0.0016956329,-0.011123657,0.017807007,0.009155273,0.0064430237,0.012619019,0.009162903,-0.0009188652,-0.0013332367,0.005088806,-0.008323669,-0.029800415,0.0112838745,-0.010734558,-0.04714966,0.0030975342,0.01020813,0.07287598,-0.049987793,0.045654297,0.001619339,0.0031433105,0.052886963,-0.007671356,-0.05117798,0.0036182404,0.016204834,0.01651001,0.055236816,0.017822266,-0.030807495,-0.017791748,0.07647705,-0.0027389526,-0.0036239624,0.016921997,0.01473999,0.042510986,-0.0052452087,-0.06628418,-0.03326416,-0.0048828125,-0.037719727,0.021972656,-0.024597168,0.0317688,-0.006839752,0.012390137,-0.012237549,0.010025024,-0.029327393,0.008880615,-0.019317627,0.010772705,-0.030181885,-0.019317627,0.010108948,0.0059318542,-0.0059013367,0.012207031,0.036224365,0.029144287,0.0005707741,-0.028182983,-0.025146484,-0.008079529,-0.005054474,0.012771606,0.0046844482,0.0259552,0.043914795,-0.0395813,0.0046920776,0.023406982,0.0063819885,0.027496338,-0.005558014,-0.004623413,-0.068237305,-0.04660034,-0.021942139,-0.03878784,0.03225708,0.020767212,-0.011787415,0.04812622,0.007926941,-0.018157959,-0.042663574,0.020080566,-0.04977417,-0.004840851,0.0357666,-0.029769897,-0.037994385,0.011672974,-0.0007658005,-0.0010538101,0.030029297,0.017303467,0.026062012,0.062683105,0.032318115,0.008911133,0.01876831,0.015602112,0.031402588,0.0075149536,-0.033325195,-0.032806396,-0.0149383545,0.036834717,-0.023712158,-0.0158844,-0.0680542,0.05996704,0.03756714,0.09350586,0.02015686,0.01008606,0.028182983,-0.013755798,0.022705078,-0.027954102,-0.017547607,-0.023605347,-0.04751587,0.030944824,-0.017471313,-0.012382507,-0.026977539,0.04928589,-0.0096588135,0.016357422,-0.030212402,0.047302246,-0.02015686,-0.014564514,0.014404297,0.021728516,0.059173584,0.077697754,-0.053466797,0.018829346,0.029541016,-0.020767212,0.010513306,0.04937744,-0.009628296,-0.0040779114,-0.055511475,-0.027954102,-0.0062713623,-0.018951416,-0.053375244,0.007507324,0.020706177,0.021484375,0.01260376,0.000497818,-0.022323608,-0.0037708282,-0.018859863,-0.05117798,0.006877899,-0.043273926,0.003490448,0.046936035,-0.02557373,-0.0026683807,-0.0034942627,-0.012290955,-0.017288208,0.015670776,0.03479004,0.0028648376,-0.049804688,0.03250122,0.0064086914,0.002401352,0.007850647,0.046569824,0.03414917,0.038909912,0.04611206,0.017471313,-0.012535095,-0.066589355,0.030349731,-0.046417236,-0.00016415119,0.03302002,-0.025924683,0.000016570091,-0.02078247,-0.03326416,-0.022491455,0.017593384,-0.02961731,-0.0067481995,0.014472961,-0.013366699,-0.028533936,-0.051574707,-0.02015686,-0.010795593,0.06439209,0.015403748,0.012191772,-0.06402588,-0.0013151169,0.027542114,0.009025574,0.03427124,-0.014091492,-0.014663696,-0.02104187,-0.038513184,-0.006931305,-0.025970459,0.019989014,-0.012786865,-0.009460449,0.022521973,0.012924194,0.02532959,0.0087890625,0.013549805,0.03668213,-0.030838013,-0.018173218,-0.01737976,0.031311035,0.008735657,-0.0068588257,-0.054504395,0.038482666,0.014198303,0.028366089,-0.042999268,-0.008102417,-0.0079422,0.011230469,0.00982666,-0.008666992,-0.007736206,-0.0038375854,-0.047454834,-0.053619385,0.041870117,-0.025741577,0.026000977,0.024612427,0.00038981438,0.03213501,-0.014434814,0.0025424957,0.0113220215,-0.023925781,-0.0065460205,-0.01436615,-0.028656006,-0.020385742,-0.0127334595,-0.025772095,0.033081055,-0.018356323,0.02671814,-0.0014047623,-0.016601562,0.027389526,-0.0009784698,-0.00065755844,0.016693115,-0.007331848,0.021499634,0.045166016,0.009788513,-0.054138184,0.023788452,-0.003124237,0.0066375732,-0.00085639954,0.045684814,0.026794434,-0.0058937073,-0.0014657974,-0.009300232,-0.0158844,-0.025177002,0.00011742115,0.013252258,0.012138367,-0.0027446747,-0.037231445,0.009719849,0.010345459,-0.03857422,-0.025604248,0.016067505,0.019836426,-0.029174805,0.024276733,0.0345459,0.05203247,-0.027618408,-0.008705139,-0.0003709793,0.022216797,0.03555298,0.016403198,-0.0017442703,0.016998291,-0.011695862,0.006175995,-0.007209778,-0.01574707,0.023223877,-0.0024604797,0.023956299,0.020446777,0.0011472702,-0.016967773,-0.034606934,0.0042800903,-0.016860962,-0.02609253,0.024612427,0.013702393,0.028869629,-0.017227173,0.020523071,0.020629883,-0.022537231,-0.010360718,-0.002632141,0.040771484,-0.017410278,-0.011192322,0.015838623,0.014381409,0.032226562,-0.06100464,-0.0037670135,0.0030460358,0.013092041,-0.021514893,-0.044769287,-0.045928955,0.014274597,0.043273926,0.011909485,0.018112183,0.035186768,0.008155823,0.01878357,0.026992798,-0.00081062317,-0.01612854,-0.012939453,-0.04397583,-0.01689148,-0.026870728,-0.0008921623,-0.037750244,0.0099487305,-0.0064201355,-0.038330078,0.008712769,-0.0154953,-0.00258255,0.004550934,0.010643005,0.043762207,0.0035209656,0.014045715,-0.0129852295,-0.037200928,0.007003784,-0.004096985,0.0256958,-0.04220581,0.0032024384,-0.00907135,-0.011932373,0.01020813,0.004886627,0.01852417,0.026397705,0.004386902,0.037384033,-0.043762207,0.05517578,-0.03656006,0.012489319,0.0022659302,-0.03427124,-0.016433716,-0.024993896,-0.015235901,0.03781128,-0.02772522,-0.0008997917,-0.02204895,-0.0418396,-0.003030777,-0.0496521,0.015686035,0.036346436,0.036102295,-0.017303467,-0.003522873,0.006591797,0.004272461,-0.013755798,0.0043411255,-0.018493652,0.0259552,0.017578125,0.00573349,-0.028549194,-0.024383545,-0.018066406,0.008811951,-0.03665161,-0.047058105,-0.011734009,0.0036830902,-0.012809753,-0.017242432,-0.015686035,-0.030914307,-0.0035953522,-0.042053223,0.013366699,0.008430481,0.026870728,0.0003476143,-0.02619934,0.00023317337,0.011161804,-0.020843506,0.043273926,0.0022087097,-0.011383057,-0.036621094,0.003271103,0.024459839,0.02015686,-0.00093460083,-0.01838684,-0.010093689,-0.01600647,-0.05532837,0.005367279,-0.007411957,-0.014053345,-0.009780884,0.010246277,-0.055236816,-0.0051116943,-0.022903442,0.005744934,0.0236969,0.0074768066,0.00894928,7.748604e-7,0.009239197,-0.0018949509,-0.007709503,-0.028625488,0.021881104,0.010643005,0.0020046234,0.027053833,0.041015625,0.0018692017,-0.02394104,0.0038909912,0.0064926147,0.009788513,-0.03314209,0.012573242,-0.020111084,0.00894165,-0.006095886,-0.011505127,-0.033416748,-0.0070724487,0.08227539,-0.00086545944,-0.01864624,-0.007221222,-0.020202637,0.015548706,0.020492554,-0.04626465,-0.003578186,-0.031951904,0.01626587,-0.032714844,0.011123657,-0.0067825317,0.022399902,-0.016799927,-0.057159424,-0.022583008,0.0027770996,-0.013038635,-0.05819702,-0.02784729,-0.072265625,0.0055885315,-0.0029621124,-0.021270752,-0.0065727234,0.000002503395,-0.02394104,-0.074401855,0.008621216,0.04232788,0.011428833,0.0309906,-0.0059509277,0.02154541,0.021377563,-0.034088135,0.0026454926,0.027313232,-0.016662598,-0.012756348,-0.010978699,0.014312744,-0.021530151,-0.01473999,0.007637024,0.013626099,0.011383057,-0.010261536,0.014213562,-0.0065727234,0.01977539,-0.017730713,0.007183075,-0.014823914,-0.0075645447,0.03375244,-0.05166626,0.025772095,0.017745972,-0.01399231,-0.000073075294,0.025619507,0.042144775,-0.032348633,-0.021057129,0.016098022,0.0041122437,0.039398193,-0.029586792,0.04135132,0.02709961,-0.019882202,0.007282257,-0.009895325,-0.016433716,-0.021820068,-0.03540039,0.022277832,-0.0008921623,0.0132751465,-0.018478394,0.0064964294,0.013824463,0.0018701553,0.007347107,-0.0049476624,-0.022003174,-0.009513855,-0.00013780594,-0.0018262863,0.015792847,-0.0075912476,0.021636963,0.021469116,0.041168213,0.007774353,-0.010475159,-0.0029239655,0.031097412,-0.012550354,0.007293701,0.024108887,0.015792847,0.02458191,0.019119263,0.015220642,-0.039031982,-0.025421143,-0.0155181885,-0.01776123,-0.0014648438,-0.0135650635,-0.0099105835,-0.0085372925,0.009788513,-0.016159058,-0.03314209,-0.00065279007,-0.02305603,-0.026321411,0.004749298,-0.016220093,0.026794434,0.0045700073,0.00566864,0.0055274963,-0.0074501038,0.042144775,-0.005630493,-0.01084137,0.026733398,0.033294678,0.01423645,-0.032165527,-0.007461548,-0.012786865,-0.010681152,0.00053215027,-0.029541016,0.0072021484,0.04876709,-0.012710571,0.011329651,0.00004082918,0.019500732,-0.00082826614,0.0059127808,-0.014419556,0.010787964,-0.009559631,0.040924072,-0.041503906,0.026977539,0.014976501,0.0031528473,-0.01600647,-0.011947632,-0.024398804,0.007133484,0.018615723,-0.008857727,0.055389404,-0.00083971024,0.020599365,-0.0119018555,-0.021362305,0.017730713,-0.025650024,-0.017623901,0.032196045,-0.0026168823,0.0064964294,0.010002136,-0.025283813,0.033477783,-0.038238525,0.012481689,-0.000477314,0.011528015,0.009346008,-0.019119263,-0.007385254,-0.018127441,-0.0121154785,0.021652222,0.0012283325,0.047027588,0.00932312,0.03488159,0.058929443,0.028427124,-0.0011863708,-0.034942627,-0.025344849,-0.0008187294,-0.023269653,0.02015686,-0.005783081,0.056274414,0.037628174,0.008163452,0.04034424,0.033569336,0.041625977,0.0063972473,0.012008667,-0.025131226,0.01171875,0.0063591003,0.02758789,-0.0058670044,0.029571533,-0.027389526,0.027145386,0.0057029724,0.032989502,-0.037902832,0.022857666,0.07147217,0.011543274,-0.015670776,0.05117798,-0.012008667,-0.012611389,-0.013168335,-0.019729614,0.060272217,0.017456055,0.047607422,0.05819702,0.021774292,-0.011383057,0.014122009,-0.028289795,-0.02709961,0.06549072,0.024902344,-0.023544312,-0.0154953,-0.00062561035,0.016952515,-0.04345703,-0.020324707,0.02758789,-0.015380859,0.008895874,-0.0085372925,-0.003288269,-0.013885498,0.007610321,0.022705078,0.008506775,-0.021713257,0.01953125,0.03564453,-0.0014019012,0.028793335,-0.00065135956,0.018966675,-0.027770996,-0.021133423,0.012260437,0.01739502,-0.020065308,-0.015258789,0.027511597,0.0058174133,0.030700684,0.038726807,-0.023284912,0.0021514893,0.025863647,0.021347046,-0.011543274,0.05343628,0.040222168,0.012382507,0.03479004,0.026229858,0.036590576,-0.038879395,0.025405884,0.0041618347,0.016494751,0.0004169941,-0.002210617,0.014793396,-0.013885498,0.0078048706,-0.0015964508,-0.013053894,0.027328491,0.024993896,-0.011734009,-0.008232117,-0.007671356,-0.00079393387,-0.026245117,-0.008903503,0.0008864403,-0.020980835,0.036010742,0.015625,0.030090332,-0.024642944,0.016616821,-0.0022144318,-0.01777649,-0.006290436,0.013626099,-0.036499023,0.00090932846,-0.0036849976,-0.0024261475,-0.044281006,0.010658264,0.023376465,-0.01802063,0.025512695,0.013435364,-0.0030441284,-0.0013065338,0.017303467,0.015571594,0.002216339,-0.010734558,-0.01322937,0.030181885,0.047729492,-0.008300781,-0.0020065308,-0.033081055,-0.0052986145,0.0060920715,-0.0024871826,-0.0056648254,-0.0032424927,-0.016494751,-0.022918701,0.021316528,0.03918457,0.029769897,0.05239868,-0.023757935,-0.013244629,0.001247406,0.033721924,-0.0009045601,-0.002193451,-0.0065307617,0.0072746277,-0.012924194,0.044555664,0.024810791,0.013053894,0.03250122,0.0017681122,-0.011604309,0.0052833557,-0.008354187,0.025848389,-0.018325806,-0.000702858,-0.0026474,0.027694702,-0.014625549,-0.032073975,0.0042381287,-0.0103302,-0.024032593,-0.019943237,0.012107849,0.011604309,0.02609253,0.03692627,0.032989502,-0.016677856,0.06048584,-0.0099487305,0.053588867,0.005672455,-0.009605408,0.05050659,0.017745972,0.03213501,0.010292053,0.009849548,-0.03253174,0.009735107,0.037139893,0.02947998,0.009819031,0.007499695,-0.006210327,0.038330078,-0.009246826,0.024719238,-0.012962341,0.000344038,0.01776123,-0.0049095154,-0.009490967,-0.002298355,-0.0045814514,0.012786865,0.052246094,-0.026992798,-0.009765625,-0.031677246,-0.011772156,0.023635864,-0.014572144,0.0009794235,0.00308609,-0.014457703,0.008728027,-0.02041626,-0.036621094,0.009773254,0.025527954,-0.0579834,-0.019348145,0.0020446777,0.01914978,-0.017074585,0.03829956,0.02784729,-0.003982544,0.0013999939,0.042999268,-0.010520935,0.028396606,-0.012519836,0.023010254,0.035339355,0.011161804,-0.0231781,-0.0026779175,0.0013542175,-0.011642456,0.016342163,0.04525757,-0.004257202,0.013328552,-0.0066833496,-0.013069153,-0.004589081,0.0000074505806,-0.01889038,0.014045715,-0.011238098,-0.014808655,-0.0011730194,0.0028476715,-0.008415222,-0.0011787415,-0.017913818,-0.010810852,0.0015287399,0.026473999,0.020599365,-0.03793335,-0.0073509216,0.013755798,0.014846802,-0.02432251,-0.010749817,-0.0047454834,-0.03778076,0.012817383,0.013114929,0.015792847,0.003873825,-0.020187378,0.00039052963,0.03604126,0.011375427,0.021530151,0.0046043396,-0.0032444,0.011756897,-0.013000488,-0.0016126633,0.0016908646,-0.023345947,0.008926392,0.020843506,0.007423401,-0.029907227,0.032714844,0.00007766485,0.01586914,-0.008392334,-0.01449585,0.018814087,-0.0079193115,-0.0018491745,0.0077171326,0.014328003,-0.015045166,-0.010246277,-0.014457703,0.037963867,0.061920166,-0.0116119385,-0.004146576,0.03062439,0.017791748,0.014213562,0.039001465,0.004058838,0.03869629,0.019500732,-0.016967773,-0.02015686,0.027954102,-0.0053710938,-0.027236938,0.017807007,-0.01737976,-0.021102905,0.016174316,0.017807007,-0.0014657974,-0.031951904,-0.008331299,-0.014923096,-0.013259888,0.019454956,-0.013496399,0.018249512,-0.026794434,-0.0066986084,0.00932312,-0.028137207,-0.051696777,-0.017501831,-0.0035533905,-0.0052375793,-0.052581787,-0.0005378723,-0.032226562,0.011070251,-0.037353516,-0.011543274,-0.016098022,0.008926392,-0.019561768,-0.0010557175,0.0019512177,0.020248413,0.028396606,0.0055885315,0.022399902,-0.032836914,-0.026397705,-0.021469116,0.0058784485,-0.008033752,0.018371582,0.008422852,0.028244019,0.026977539,-0.0084991455,-0.003955841,-0.002872467,-0.004802704,-0.008323669,-0.024795532,-0.023452759,0.028182983,0.019012451,-0.017303467,-0.020721436,0.044952393,-0.024108887,-0.013755798,0.0335083,0.043029785,0.015380859,0.018371582,-0.015899658,-0.00083208084,-0.017410278,0.0025367737,-0.014694214,0.0035305023,0.007411957,-0.0016374588,-0.0045166016,0.012123108,0.018478394,-0.008430481,-0.01373291,0.035095215,0.014198303,-0.015258789,0.037719727,0.013847351,0.011726379,-0.0107803345,-0.005104065,0.021911621,0.052459717,0.004501343,0.0110321045,0.0016775131,0.0034294128,-0.0070724487,0.012168884,0.017364502,-0.019805908,-0.04714966,-0.024658203,-0.021362305,0.013046265,0.006549835,0.013954163,-0.006210327,0.01940918,-0.019989014,-0.02319336,-0.0262146,0.028137207,0.0047683716,-0.012207031,-0.012992859,0.017089844,0.010284424,-0.043762207,0.0024089813,-0.039031982,-0.027511597,-0.00017261505,-0.0262146,0.024108887,0.010795593,-0.008430481,-0.0054855347,-0.008255005,-0.008590698,-0.0002310276,0.034973145,-0.013069153,-0.0036468506,0.03375244,0.025161743,-0.017333984,0.022705078,-0.0073928833,-0.0006289482,0.016494751,-0.020629883,0.013191223,-0.015686035,0.029281616,-0.012626648,-0.0020713806,0.030838013,-0.012527466,0.010101318,-0.027053833,-0.0024471283,-0.0049591064,-0.0028362274,0.037261963,-0.023269653,-0.023620605,0.006652832,-0.019744873,-0.02507019,0.0020217896,0.021026611,0.037384033,-0.013534546,0.05419922,-0.024612427,-0.0049934387,0.0141067505,0.0104522705,-0.018249512,0.01007843,0.024017334,0.008781433,-0.0031471252,-0.007873535,-0.012580872,-0.032318115,-0.004600525,0.02166748,-0.005428314,-0.010810852,0.024551392,0.0124053955,0.052520752,-0.0045661926,0.018585205,0.011253357,-0.00039863586,0.020889282,0.00932312,0.06616211,0.00054216385,-0.025115967,0.0024223328,0.0018119812,-0.022827148,0.0006070137,-0.006061554,0.0033912659,-0.037902832,0.015144348,-0.010627747,0.030807495,-0.030548096,0.016204834,-0.023742676,0.00008845329,-0.03540039,-0.0066986084,-0.03010559,0.011711121,0.032684326,-0.0021400452,0.029846191,0.0006084442,-0.021408081,0.023330688,0.03894043,-0.011947632,-0.030654907,-0.01436615,0.019424438,-0.00064992905,0.021118164,0.010429382,-0.022628784,-0.013496399,0.007987976,-0.025100708,0.0072631836,-0.0070266724,0.014808655,0.0068206787,-0.0021305084,-0.010635376,0.03253174,-0.001745224,-0.0060043335,0.008872986,0.0040893555,0.040008545,0.033966064,-0.019317627,0.01651001,0.009819031,-0.038482666,0.053771973,0.010787964,0.028915405,-0.021942139,-0.004951477,-0.036071777,-0.026367188,-0.014381409,0.009216309],"createdAt":"2026-04-18T18:44:06.719Z","updatedAt":"2026-04-22T05:30:58.835Z","lastSeenAt":"2026-04-22T05:30:58.835Z","tsv":"'/api/v1/charges/132':56,156 '/request':13,28 '0.02':12,27,78,149 '000':72 '20':71 '402':66 '402 payment protocol' 'Base network API' 'USDC pay-per-call' 'accept':46 'access':62,92 'across':108 'actual':212 'addit':206 'advertis':83 'ai':118 'analysi':122 'analyt':112 'api':5,20,38,61,85,166,193 'attach':95 'avail':185 'base':8,23,51,73 'behind':214 'bodi':184 'broader':104 'call':4,19,80 'categori':110,167 'challeng':67 'classif':125 'clear':159 'connect':201 'content':207 'convers':142 'crawl':188 'crypto API access' 'data':111,115 'detail':178 'doc':191 'document':179 'embed':126 'endpoint':55,107,145,155,217 'estim':136 'exampl':182 'exchang':131 'export':116 'feed':130 'financ':127 'four':109 'function':213 'gas':135 'generat':143 'geocod':140 'header':99 'howev':152 'http-post' 'i.e':77 'infrastructur':138 'insight':117 'instant':91 'key':86 'land':170 'learn':120 'limit':89 'list':58,147 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':119 'map':160 'metric':113 'micropayment API' 'name':165 'network':9,24,52 'no-api-key' 'offer':106 'openapi':175 'page':171,189,196 'particular':216 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,98 'per':3,18,36,79,150 'platform':6,21,39,82,105 'premium':60 'price':129,192 'prompt':203 'protocol':44 'quot':134 'rate':88,132 'readm':195 'remain':218 'render':198 'report':114 'request':37,68,102,151 'request/response':183 'result':210 'return':64 'schema':176 'sentiment':121 'simpli':94 'specif':54,154 'summar':124 'text':123 'token':133 'unclear':219 'unit':74 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':139 'valid':141 'via':10,25 'wallet':202 'web3':128 'x402':11,26,43,97 'x402 API' 'x402-payment'","prices":[{"id":"3219b1a6-05fe-4a67-8e13-fbfe1ce591ab","listingId":"c9b2d290-677b-4982-adbf-f2f3525dff9d","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/132","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:06.719Z"}],"sources":[{"listingId":"c9b2d290-677b-4982-adbf-f2f3525dff9d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/132","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:06.719Z","lastSeenAt":"2026-04-22T05:30:58.835Z"}],"details":{"listingId":"c9b2d290-677b-4982-adbf-f2f3525dff9d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/132 \\\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 a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/charges/132"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/132"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to API services without traditional API key registration","Agent-driven workflows that need on-demand API calls settled in USDC","Paying per request for data, AI inference, or utility endpoints on Base"],"bestFor":["Developers or agents who want keyless, pay-as-you-go API access","x402-compatible clients on the Base network","Low-volume or sporadic API usage where subscriptions are unnecessary"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:25.334Z"},"updatedAt":"2026-04-22T05:30:58.835Z"}}