{"id":"81ccd3c1-db47-40df-a603-18ea3a0038ac","shortId":"Y7NzZG","kind":"x402","title":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","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 at `/api/v1/payments/16` is labeled \"Premium API Access\" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). 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\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the `/api/v1/payments/16` endpoint specifically returns. The x402 challenge is live and well-formed, confirming the endpoint accepts POST requests and settles in USDC on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-method","json-response"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access"],"warnings":["No OpenAPI or schema documentation available — all docs/pricing/README pages render only 'Connect wallet'","The specific functionality of /api/v1/payments/16 ('Premium API Access') is not described anywhere","No request body schema or response examples are available","The platform lists many endpoints but provides no technical details for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/16","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/16","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a wallet-connect prompt, no request/response examples, and no description of what this specific endpoint actually returns. The listing is effectively a stub.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T06:38:54.472Z","embedding":[-0.024734497,-0.0385437,0.03475952,0.014533997,0.018539429,-0.033599854,-0.025634766,0.0287323,0.06982422,-0.07104492,0.012939453,-0.04864502,-0.040405273,-0.041168213,-0.03756714,0.018737793,-0.00010818243,0.0022010803,-0.041656494,0.033996582,0.022033691,-0.02381897,-0.020080566,0.039886475,0.0026931763,-0.014625549,-0.011672974,-0.011634827,-0.01940918,-0.04901123,0.04812622,-0.025817871,-0.017028809,0.011955261,-0.019119263,-0.015304565,-0.0075416565,0.035217285,0.030014038,0.00056505203,-0.0050811768,-0.057434082,0.014549255,-0.017654419,-0.05657959,0.009033203,0.007507324,-0.02407837,0.0013475418,0.0021305084,-0.02330017,-0.004386902,-0.0047912598,-0.0033283234,0.008911133,0.010978699,-0.0040283203,-0.0032997131,0.011245728,0.0158844,-0.002981186,-0.06021118,-0.020050049,-0.010803223,0.0034713745,0.06060791,-0.010665894,0.03967285,0.020111084,0.06713867,0.034606934,0.05230713,0.0309906,0.01235199,-0.0034656525,-0.015655518,0.007381439,0.064941406,-0.009597778,-0.025726318,-0.015129089,-0.0116119385,-0.05545044,0.00605011,-0.02319336,-0.04534912,-0.018859863,0.024261475,-0.0184021,0.034057617,-0.06921387,-0.0085372925,-0.009857178,-0.0051651,0.0096588135,-0.008964539,-0.019943237,0.02798462,-0.00945282,0.010116577,0.0039138794,-0.047027588,0.009819031,0.008430481,0.031921387,0.046569824,0.024429321,0.02381897,0.0058898926,-0.003917694,-0.046325684,0.022567749,-0.005683899,-0.024871826,0.022369385,0.007827759,-0.0132369995,0.016937256,-0.030914307,0.012779236,-0.04650879,0.047912598,0.006767273,0.010429382,0.010566711,-0.05026245,-0.016983032,0.015029907,-0.021224976,-0.0068092346,0.0044822693,0.01474762,0.039733887,-0.004196167,-0.034484863,0.019210815,-0.02331543,-0.0149383545,-0.0491333,-0.031829834,0.038391113,-0.035064697,0.013252258,0.029708862,-0.09802246,-0.012580872,-0.046020508,0.010375977,-0.035125732,-0.014663696,0.004463196,0.020828247,-0.015296936,-0.00774765,-0.029190063,-0.030090332,-0.0038070679,0.03375244,-0.01033783,0.046325684,-0.016799927,0.030914307,0.025054932,0.007785797,0.022567749,0.01927185,-0.0017585754,-0.07720947,-0.076171875,-0.015319824,-0.0017786026,-0.020874023,-0.027267456,0.012161255,-0.011734009,-0.07495117,-0.020889282,-0.011962891,-0.011398315,-0.036743164,-0.00029993057,-0.03668213,0.019363403,-0.0057144165,-0.064331055,-0.02003479,-0.02444458,0.055664062,0.030380249,0.022125244,0.024261475,-0.018508911,0.05670166,0.026123047,-0.017913818,-0.027069092,0.024002075,-0.013504028,0.016586304,-0.014533997,0.01424408,-0.033172607,0.040130615,0.069885254,0.017028809,-0.023498535,-0.015930176,-0.051818848,-0.052093506,-0.034484863,0.024429321,0.0041885376,0.0035629272,0.027450562,-0.033691406,-0.028381348,0.008415222,0.01084137,0.018432617,0.06744385,0.0039634705,-0.011100769,0.030456543,0.017715454,-0.05026245,0.038269043,0.039276123,0.010597229,-0.01979065,-0.022766113,0.030380249,0.034118652,-0.028945923,0.019088745,-0.018692017,0.025558472,-0.0071411133,0.0009880066,0.012054443,-0.0082473755,-0.022491455,-0.024536133,-0.025970459,0.024246216,0.0023021698,-0.025527954,-0.034820557,-0.0748291,0.04260254,0.030944824,0.039123535,0.00062179565,0.006664276,-0.021759033,-0.005168915,-0.075683594,0.06365967,0.07537842,-0.0060272217,-0.008552551,0.01651001,-0.01184082,-0.033843994,0.009483337,-0.009681702,-0.034210205,-0.026809692,0.015930176,-0.039398193,0.0025920868,0.02909851,0.02583313,0.049316406,-0.0058670044,-0.046142578,-0.021972656,-0.008163452,0.0010948181,-0.034729004,-0.0078048706,0.0030975342,0.019088745,0.024765015,0.0009598732,0.015670776,-0.0000654459,-0.012504578,-0.003004074,0.007160187,-0.010017395,-0.03717041,0.027999878,0.0018196106,-0.056610107,0.0016040802,-0.006427765,0.06561279,-0.04852295,0.034942627,-0.01109314,0.012619019,0.053253174,-0.0027179718,-0.050567627,0.009376526,0.023406982,0.0023860931,0.047302246,0.017242432,-0.025894165,-0.01977539,0.06756592,-0.010910034,0.0011024475,0.012039185,0.016174316,0.029067993,-0.0022296906,-0.06604004,-0.035858154,0.00052165985,-0.025314331,0.024551392,-0.021850586,0.028640747,-0.017974854,0.0016641617,-0.03289795,0.005039215,-0.03265381,0.008323669,-0.017471313,0.0066184998,-0.018692017,-0.017791748,0.009819031,0.0071640015,-0.014472961,0.014015198,0.04525757,0.023284912,-0.0058403015,-0.026687622,-0.036224365,-0.01965332,-0.012077332,0.023544312,0.023147583,0.023544312,0.048583984,-0.050994873,0.0058403015,0.026992798,0.015457153,0.029785156,-0.0028953552,-0.0022735596,-0.074401855,-0.062347412,-0.029724121,-0.033050537,0.04046631,0.010314941,-0.011680603,0.062347412,0.015296936,-0.019317627,-0.043060303,0.015914917,-0.040374756,-0.0017900467,0.04647827,-0.01777649,-0.029449463,0.0075035095,-0.012962341,0.00459671,0.032684326,0.025665283,0.03262329,0.06225586,0.04196167,0.013092041,0.014533997,0.000790596,0.028213501,0.009674072,-0.022750854,-0.018554688,-0.011352539,0.040924072,-0.026809692,-0.016571045,-0.059661865,0.059906006,0.041412354,0.08618164,0.025787354,-0.0006303787,0.0390625,-0.024597168,0.025650024,-0.02633667,-0.02760315,-0.021850586,-0.05279541,0.034179688,-0.011627197,-0.00374794,-0.025787354,0.022720337,0.00076055527,0.019058228,-0.035308838,0.0473938,-0.0038204193,-0.016204834,0.018753052,0.013015747,0.0541687,0.052612305,-0.039855957,0.016983032,0.013366699,-0.035247803,0.0023212433,0.026779175,-0.014533997,-0.0016946793,-0.04626465,-0.036132812,-0.012802124,-0.006427765,-0.048309326,-0.005214691,0.0021648407,0.018707275,0.03277588,-0.012580872,-0.012252808,-0.007446289,-0.01838684,-0.046173096,0.0024108887,-0.04159546,-0.0038909912,0.034332275,-0.031951904,-0.014472961,-0.003168106,-0.0013990402,0.0014295578,0.016540527,0.025939941,0.0030841827,-0.03942871,0.032073975,0.014785767,0.006248474,0.0070266724,0.024810791,0.014343262,0.027679443,0.04837036,0.014816284,-0.015960693,-0.06536865,0.029800415,-0.04425049,0.00018882751,0.017242432,-0.014305115,-0.00315094,-0.02470398,-0.027999878,-0.041534424,0.005882263,-0.0184021,-0.0032844543,0.020553589,-0.018585205,-0.02633667,-0.052856445,-0.020248413,-0.004749298,0.06817627,0.023788452,-0.0029582977,-0.06341553,0.0050621033,0.016586304,0.008468628,0.032989502,-0.013557434,-0.006980896,-0.022872925,-0.032836914,-0.014724731,-0.020446777,0.015457153,-0.0075416565,-0.0013923645,0.026931763,0.020446777,0.028076172,-0.0009121895,0.01399231,0.020858765,-0.023330688,-0.006855011,-0.004169464,0.0335083,0.01713562,-0.0018758774,-0.047180176,0.041229248,0.013267517,0.030029297,-0.044158936,-0.0058784485,-0.00737381,0.010536194,0.01058197,-0.006778717,-0.009628296,-0.0055503845,-0.051727295,-0.07458496,0.046417236,-0.017913818,0.025375366,0.02760315,0.0019407272,0.024520874,-0.0076904297,0.0017547607,0.015052795,-0.024597168,-0.013061523,-0.025512695,-0.033294678,-0.016693115,-0.01121521,-0.018539429,0.018234253,-0.020874023,0.017623901,-0.0014047623,-0.022644043,0.024520874,-0.0036010742,-0.008956909,0.017868042,0.0065574646,0.03010559,0.041290283,0.0053100586,-0.036346436,0.018096924,0.008880615,0.008705139,-0.0044021606,0.044555664,0.035369873,-0.0045928955,-0.008911133,-0.009819031,-0.01158905,-0.015380859,0.006126404,0.012359619,0.014862061,-0.0052490234,-0.040924072,0.009666443,0.0059547424,-0.03918457,-0.027923584,0.010307312,0.01260376,-0.038848877,0.017990112,0.027450562,0.055236816,-0.019119263,-0.0028877258,0.0056152344,0.03060913,0.029266357,0.013023376,-0.012664795,0.017868042,-0.003932953,0.013595581,-0.0026988983,-0.008094788,0.022094727,-0.00082731247,0.025924683,0.018859863,0.001786232,-0.0209198,-0.032684326,-0.001156807,-0.023376465,-0.025558472,0.021087646,0.01739502,0.031066895,-0.029174805,0.019927979,0.0184021,-0.015792847,-0.01638794,-0.012588501,0.041229248,-0.013916016,-0.009262085,0.017105103,0.0149002075,0.037750244,-0.0552063,-0.0045928955,0.0022888184,0.010391235,-0.030380249,-0.03866577,-0.03753662,0.0051879883,0.04107666,0.011123657,0.023773193,0.03543091,0.0067481995,0.0064888,0.02848816,0.0070724487,-0.012512207,-0.019332886,-0.049957275,-0.017929077,-0.0072746277,-0.002796173,-0.02696228,0.010215759,-0.0022964478,-0.024383545,0.017211914,-0.007724762,-0.0042762756,-0.014976501,0.008132935,0.04434204,-0.0021953583,0.021072388,-0.017807007,-0.035827637,-0.008811951,0.0062828064,0.019256592,-0.047088623,0.01676941,-0.01322937,-0.004573822,0.006298065,0.0077438354,0.011604309,0.027420044,0.006893158,0.03112793,-0.044311523,0.049224854,-0.039367676,0.013137817,0.011161804,-0.03390503,-0.009757996,-0.021743774,-0.014862061,0.041748047,-0.030822754,-0.0033740997,-0.026855469,-0.0395813,-0.011550903,-0.05267334,0.009338379,0.037322998,0.037475586,-0.029327393,0.0012187958,-0.0044174194,0.0019483566,-0.018035889,0.009246826,-0.017990112,0.02243042,0.022064209,0.0037956238,-0.035827637,-0.029190063,-0.025054932,-0.0007662773,-0.04220581,-0.051239014,-0.00806427,-0.0023612976,-0.0051994324,-0.012863159,-0.028686523,-0.03237915,-0.00007379055,-0.040893555,0.010757446,0.0036525726,0.0151901245,0.0038013458,-0.023406982,-0.0011949539,0.009124756,-0.016036987,0.03744507,0.009674072,-0.006286621,-0.048065186,0.0104904175,0.015319824,0.01991272,-0.012260437,-0.014076233,-0.009414673,-0.018692017,-0.05606079,-0.0048980713,-0.008857727,-0.008956909,-0.008987427,0.0025749207,-0.05102539,-0.0013303757,-0.026031494,0.007160187,0.029708862,0.018203735,0.0071258545,0.0050964355,0.012878418,0.0014429092,-0.011398315,-0.02760315,0.01776123,0.009719849,0.00705719,0.033203125,0.04083252,0.0048561096,-0.027389526,0.008888245,0.011260986,0.021774292,-0.019302368,0.008407593,-0.022018433,0.006538391,-0.013916016,-0.011199951,-0.024734497,0.0049858093,0.09240723,0.004497528,-0.008956909,-0.011772156,-0.02178955,0.020614624,0.03567505,-0.043792725,-0.008811951,-0.021255493,0.022491455,-0.03164673,0.001376152,0.0049095154,0.025360107,-0.017913818,-0.05596924,-0.015357971,-0.005001068,-0.015342712,-0.06286621,-0.030715942,-0.06762695,0.0046157837,-0.011634827,-0.009628296,0.00023460388,0.007698059,-0.018295288,-0.07788086,-0.0013685226,0.04840088,0.0034332275,0.017700195,0.00015377998,0.020690918,0.019805908,-0.043640137,0.007019043,0.023773193,-0.032684326,-0.012306213,-0.024047852,0.021850586,-0.016113281,-0.008003235,0.009559631,0.0015935898,0.018951416,-0.01322937,0.010063171,-0.008804321,0.017486572,-0.021514893,0.018066406,-0.0053634644,-0.016525269,0.032928467,-0.048736572,0.028427124,0.012718201,-0.0029563904,0.001159668,0.031097412,0.043304443,-0.032989502,-0.01524353,0.021270752,0.015655518,0.03552246,-0.022415161,0.039886475,0.008277893,-0.011817932,0.015686035,-0.0028820038,-0.018112183,-0.029373169,-0.028213501,0.029953003,0.006164551,0.0021800995,-0.013023376,0.009254456,0.016708374,0.0034313202,0.01008606,-0.0032997131,-0.025375366,-0.025970459,-0.00035333633,0.0031337738,-0.0017309189,-0.0022277832,0.02708435,0.028884888,0.036315918,0.008773804,-0.016662598,-0.00041365623,0.033599854,-0.008956909,-0.0014858246,0.03149414,0.00031113625,0.020889282,0.01864624,0.007083893,-0.040100098,-0.020751953,-0.02519226,-0.017745972,-0.0028057098,-0.00868988,-0.01777649,-0.0040664673,0.0046844482,-0.009056091,-0.029724121,0.007457733,-0.036895752,-0.027160645,-0.0063934326,-0.009231567,0.029327393,0.0011320114,0.009407043,0.007171631,-0.0055885315,0.038391113,0.0029697418,-0.015914917,0.043182373,0.031677246,0.016494751,-0.028335571,-0.0070762634,-0.011207581,-0.009422302,0.0016460419,-0.045166016,0.012016296,0.050994873,-0.022903442,0.0054893494,0.0042419434,0.030899048,0.0008378029,0.0027999878,-0.009147644,0.015808105,-0.007247925,0.04168701,-0.041931152,0.023284912,0.010009766,0.0067710876,-0.017822266,-0.0054130554,-0.030181885,0.017791748,0.0041275024,-0.004234314,0.049987793,-0.0028972626,0.025665283,-0.023834229,-0.024520874,0.015068054,-0.02822876,-0.026916504,0.022705078,-0.0063209534,-0.0047798157,0.012512207,-0.021453857,0.037750244,-0.029373169,0.01902771,0.0030899048,0.00065517426,-0.005428314,-0.013557434,-0.012802124,-0.015068054,-0.010528564,0.0034751892,-0.0021076202,0.04257202,0.018737793,0.028686523,0.05783081,0.020874023,-0.008262634,-0.0390625,-0.027832031,0.0016613007,-0.007259369,0.016067505,-0.0104904175,0.061676025,0.028915405,0.0035915375,0.03375244,0.02470398,0.03692627,0.010955811,0.0054359436,-0.012504578,0.015220642,-0.000041246414,0.030441284,-0.0032024384,0.033111572,-0.045135498,0.029037476,0.021057129,0.023529053,-0.025360107,0.035614014,0.06329346,0.017227173,-0.014953613,0.052856445,-0.004722595,-0.0019931793,-0.017730713,-0.0129776,0.05130005,0.013710022,0.0446167,0.05142212,0.012001038,0.003522873,0.01928711,-0.025009155,-0.02949524,0.061950684,0.029342651,-0.018814087,-0.016799927,-0.0047035217,0.003709793,-0.051696777,-0.025360107,0.026733398,-0.015083313,0.010246277,-0.005016327,-0.014595032,-0.012809753,0.004638672,0.024032593,0.010177612,-0.016555786,0.03427124,0.032073975,-0.0010232925,0.031021118,0.0031871796,0.029342651,-0.020843506,-0.030944824,0.012413025,0.020858765,-0.009590149,-0.010948181,0.021484375,0.010986328,0.04156494,0.046661377,-0.01826477,0.013389587,0.029525757,0.013389587,-0.0038433075,0.05987549,0.03869629,0.017440796,0.0418396,0.027420044,0.032073975,-0.04232788,0.0141067505,0.003932953,0.005142212,-0.0105896,-0.01524353,0.006214142,-0.02003479,0.017318726,0.0002644062,-0.017578125,0.019683838,0.020980835,-0.0027122498,-0.009033203,-0.0033988953,0.017044067,-0.017684937,-0.0052108765,0.0140686035,-0.013328552,0.038146973,0.01007843,0.028030396,-0.02305603,0.027572632,-0.006362915,-0.008544922,-0.00057411194,0.021453857,-0.03274536,0.009986877,-0.00819397,0.0048713684,-0.047912598,0.017807007,0.033416748,-0.018585205,0.024093628,0.010757446,0.0018787384,0.00043559074,0.028289795,0.0036907196,-0.0040245056,-0.0020809174,-0.026382446,0.021499634,0.046905518,0.002210617,-0.00006937981,-0.029220581,-0.0058670044,0.011947632,-0.008811951,0.0016899109,-0.009757996,-0.023361206,-0.017532349,0.01625061,0.032684326,0.021224976,0.046966553,-0.022567749,-0.021270752,0.013465881,0.038146973,0.0060577393,0.0033855438,-0.011245728,0.026779175,-0.01638794,0.04574585,0.03955078,0.01158905,0.03466797,-0.006084442,-0.020309448,0.007671356,-0.010284424,0.017700195,-0.013061523,0.0065307617,0.00066900253,0.035217285,-0.0082092285,-0.039276123,0.009590149,-0.009414673,-0.025634766,-0.024734497,0.021881104,0.0071983337,0.030456543,0.04638672,0.015182495,-0.024398804,0.059051514,-0.012489319,0.046813965,-0.0027923584,-0.006576538,0.046539307,0.019317627,0.035003662,0.020996094,0.019683838,-0.03439331,0.01626587,0.03463745,0.029296875,0.015701294,0.0020484924,-0.023803711,0.0418396,0.011734009,0.0289917,-0.003955841,-0.0000013709068,0.008338928,-0.000936985,-0.011619568,-0.0031700134,-0.017089844,0.011917114,0.048187256,-0.027374268,-0.013977051,-0.024841309,-0.010192871,0.022750854,-0.013252258,0.000100672245,-0.0037288666,-0.021697998,0.011489868,-0.023483276,-0.031066895,0.0069770813,0.029708862,-0.045715332,-0.015029907,0.0017614365,0.023132324,-0.023971558,0.035705566,0.02558899,-0.0004093647,0.010688782,0.049438477,-0.012168884,0.03164673,-0.01675415,0.031829834,0.033203125,0.01134491,-0.018325806,0.0016345978,0.0060157776,-0.015007019,0.015487671,0.029449463,-0.0143966675,-0.00085783005,-0.000027418137,-0.0015411377,0.005657196,0.0079574585,-0.007904053,0.008903503,-0.015525818,-0.010604858,0.0009379387,0.0041236877,0.007293701,0.0041770935,-0.0019321442,-0.0067481995,0.013092041,0.029418945,0.021987915,-0.036590576,-0.0027046204,0.0044784546,0.0050735474,-0.017471313,-0.009468079,0.0066184998,-0.032928467,0.021331787,0.0181427,0.010467529,0.011116028,-0.034240723,0.0055503845,0.026229858,0.01751709,0.013954163,0.0042152405,-0.0042152405,0.014404297,-0.0072402954,-0.008155823,-0.0063438416,-0.008277893,0.007133484,0.01979065,-0.0071525574,-0.028762817,0.024841309,0.0029716492,0.013305664,0.0025558472,-0.015510559,0.01928711,-0.0059547424,-0.0057029724,0.0075035095,0.0158844,-0.007419586,-0.0129776,-0.018997192,0.037200928,0.057434082,-0.0066070557,-0.007980347,0.01864624,0.015266418,0.011352539,0.03866577,0.0009889603,0.042907715,0.031585693,-0.017440796,-0.020370483,0.024536133,-0.013114929,-0.027313232,0.01838684,-0.01574707,-0.020874023,0.022277832,0.010124207,0.0007596016,-0.03543091,-0.011627197,-0.008773804,-0.009384155,0.016830444,-0.010925293,0.008987427,-0.024230957,-0.008018494,0.0046157837,-0.023239136,-0.0440979,-0.021759033,0.0030593872,-0.008590698,-0.05368042,0.011306763,-0.027160645,0.008277893,-0.01953125,-0.0068855286,-0.014816284,0.016647339,-0.016418457,-0.011962891,0.0069770813,0.027572632,0.027770996,0.0035820007,0.026504517,-0.03488159,-0.015258789,-0.03475952,0.012870789,-0.011886597,0.02116394,0.0007710457,0.03375244,0.029800415,-0.012794495,-0.0026435852,-0.018447876,-0.007774353,-0.020721436,-0.006664276,-0.025497437,0.029403687,0.014381409,-0.0073242188,-0.009269714,0.043884277,-0.027267456,-0.019348145,0.03253174,0.04623413,0.012710571,0.031921387,-0.016830444,-0.0109939575,-0.017120361,-0.00057411194,-0.015335083,0.008415222,0.018844604,0.0003786087,-0.0031585693,0.0017690659,0.024490356,-0.0007891655,0.001045227,0.03286743,0.0053100586,-0.010437012,0.04006958,0.0072784424,0.0077552795,-0.012069702,-0.015304565,0.020019531,0.047821045,0.009971619,0.0067100525,-0.0037822723,0.0011062622,-0.0149383545,0.012741089,0.019012451,-0.021591187,-0.05026245,-0.017501831,-0.03768921,0.022369385,0.000024318695,0.009056091,-0.009544373,0.011688232,-0.020004272,-0.03289795,-0.018936157,0.025817871,0.020202637,-0.008735657,-0.010093689,0.018661499,0.011703491,-0.039276123,0.006462097,-0.04574585,-0.041259766,0.0007548332,-0.02180481,0.02268982,0.009674072,-0.004673004,0.0027389526,-0.003326416,-0.0010499954,0.0021896362,0.027038574,-0.0036563873,-0.010826111,0.03189087,0.022644043,-0.017150879,0.018157959,-0.012283325,-0.0046043396,0.017456055,-0.011810303,0.015434265,-0.019592285,0.036254883,-0.014251709,-0.00047016144,0.024932861,-0.011650085,0.009742737,-0.032073975,0.011795044,0.0019817352,-0.010414124,0.02909851,-0.034240723,-0.016860962,0.0027599335,-0.020751953,-0.02734375,0.006225586,0.017913818,0.03579712,-0.012748718,0.04623413,-0.022628784,-0.005428314,0.021224976,0.009895325,-0.017166138,0.001958847,0.032348633,-0.0017166138,-0.0055236816,-0.008132935,-0.0060195923,-0.032073975,-0.009132385,0.0149002075,-0.0021915436,-0.0051193237,0.03024292,0.0118255615,0.037872314,-0.0052375793,0.012062073,0.010681152,0.008460999,0.023849487,-0.0015602112,0.04864502,-0.0074691772,-0.03161621,0.00819397,0.006336212,-0.029632568,0.004295349,-0.004776001,-0.00006997585,-0.043273926,0.014328003,-0.008850098,0.02519226,-0.02909851,0.009292603,-0.02619934,-0.0033893585,-0.042297363,-0.009185791,-0.026779175,0.011245728,0.030136108,0.0014953613,0.023544312,0.0018024445,-0.022857666,0.0236969,0.045410156,-0.003522873,-0.03086853,-0.022460938,0.007724762,0.00008434057,0.009002686,-0.0013170242,-0.02619934,-0.009109497,-0.0016021729,-0.01727295,0.0076904297,-0.0075645447,0.01574707,0.008659363,0.0004172325,-0.004802704,0.025314331,-0.0067100525,-0.011802673,0.012611389,0.008781433,0.036895752,0.033233643,-0.017929077,0.021575928,0.01939392,-0.0473938,0.055664062,0.0025253296,0.030303955,-0.015960693,-0.0016927719,-0.03677368,-0.03024292,-0.018295288,0.0023155212],"createdAt":"2026-04-18T18:49:33.545Z","updatedAt":"2026-04-24T07:02:55.241Z","lastSeenAt":"2026-04-24T07:02:55.241Z","tsv":"'/api/v1/payments/16':59,189 '/request':12,28 '0.02':11,27,69,149 '000':73 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':216 '20':72 '6':79 'Base network API' 'USDC API' 'accept':48,205 'access':64,92 'across':108 'address':215 'advertis':83 'ai':118 'analysi':122 'analyt':112 'api':5,14,21,30,40,63,85,158 'attach':95 'base':8,24,53,74,213 'broader':104 'call':4,20,71 'categori':110 'challeng':195 'charg':66 'classif':125 'confirm':202 'connect':167 'content':173 'convers':142 'data':111,115 'decim':80 'descript':185 'detail':184 'doc':157 'document':152 'embed':126 'endpoint':57,107,145,190,204 'estim':136 'exampl':181 'exchang':131 'export':116 'extrem':154 'feed':130 'financ':127 'form':201 'four':109 'gas':135 'generat':143 'geocod':140 'header':99 'infrastructur':138 'insight':117 'instant':91 'json-response' 'key':15,31,86 'label':61 'learn':120 'limit':89 'list':147 'live':197 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':119 'metric':113 'micropayment API' 'network':54 'no-api-key' 'offer':106 'openapi':177 'page':162 'pay':2,18,37 'pay per call API' 'pay-per-cal':1,17 'pay-per-request':36 'payment':50,98 'per':3,19,38,70,150 'platform':6,22,41,82,105 'post':206 'post-method' 'premium':62 'premium API access' 'price':129,159 'prompt':169 'protocol':46 'quot':134 'rate':88,132 'readm':161 'render':164 'report':114 'request':39,102,151,207 'request/response':180 'requir':16,32 'return':192 'schema':178 'sentiment':121 'settl':209 'simpli':94 'spars':155 'specif':56,191 'summar':124 'text':123 'token':133 'unit':75 'usdc':49,77,211 'usdc-base' 'use':43 'util':139 'valid':141 'via':9,25 'wallet':168 'web3':128 'well':200 'well-form':199 'x402':10,26,45,97,194 'x402 API' 'x402-payment'","prices":[{"id":"de5ef973-b95c-4650-ad50-8cef0cb471d3","listingId":"81ccd3c1-db47-40df-a603-18ea3a0038ac","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/16","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:49:33.545Z"}],"sources":[{"listingId":"81ccd3c1-db47-40df-a603-18ea3a0038ac","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/16","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:49:33.545Z","lastSeenAt":"2026-04-24T07:02:55.241Z"}],"details":{"listingId":"81ccd3c1-db47-40df-a603-18ea3a0038ac","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/16 \\\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 x402 challenge requesting up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/16"},{"claim":"The platform lists endpoints at $0.02/request across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises no API keys, no rate limits, instant access, and Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/payments/16"}],"useCases":["Accessing premium API endpoints without managing API keys or subscriptions","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-request services into agent workflows via x402"],"bestFor":["Developers who want frictionless pay-per-call access without signup","AI agents that can settle x402 payments autonomously","Users already holding USDC on the Base network"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume callers who prefer subscription-based pricing over per-request fees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:09.526Z"},"updatedAt":"2026-04-24T07:02:55.241Z"}}