{"id":"a43ac5c1-ee4b-47c8-b6d7-676dce51da06","shortId":"hkCP5Z","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Each endpoint costs $0.02 per request, settled in USDC on the Base network with no API keys, no rate limits, and no commitments.\n\nThe specific resource probed (/api/v1/generate/resource/35) is listed under \"Premium API Access\" and returned a valid x402 challenge with maxAmountRequired of 20,000 base units of USDC (0.02 USDC = $0.02). Payment is made via the x402 exact scheme to the specified wallet address. The endpoint accepts HTTP POST requests and returns application/json responses.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The actual functionality behind \"/api/v1/generate/resource/35\" is unclear beyond the generic label \"Premium API Access.\" Without documentation or example payloads, agents will need to experiment to discover the expected input format and output structure.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","http-post"],"categories":["general","infrastructure"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition found for any endpoint","The specific purpose of /api/v1/generate/resource/35 ('Premium API Access') is not explained anywhere","No request body schema or response schema documented — callers must guess the expected input format","The broader site lists many endpoints but none have documented contracts"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/35","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/generate/resource/35","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts payments. However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response schema, and no examples. The specific functionality of 'resource/35' is entirely undocumented. This is effectively a stub listing.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T00:00:37.965Z","embedding":[-0.022903442,-0.024902344,0.050628662,0.0231781,0.013702393,-0.037078857,-0.02772522,0.030548096,0.07128906,-0.07171631,0.02507019,-0.05596924,-0.025512695,-0.040771484,-0.023071289,0.010513306,-0.002922058,-0.006137848,-0.047607422,0.018188477,0.047424316,-0.012886047,-0.031143188,0.03527832,0.0032863617,-0.026779175,-0.015975952,-0.007167816,-0.004070282,-0.030517578,0.027130127,-0.027832031,0.005771637,0.016845703,-0.02267456,-0.021606445,-0.0043907166,0.038391113,0.027755737,-0.0034618378,0.0020370483,-0.06628418,0.0079574585,-0.003929138,-0.048034668,0.01033783,0.0021381378,-0.02444458,-0.001742363,-0.0039634705,-0.036743164,-0.011581421,0.0018568039,-0.0104904175,0.0066719055,0.0018043518,-0.019088745,-0.01739502,-0.0045928955,0.015853882,0.0025596619,-0.061920166,-0.013916016,-0.008514404,0.009086609,0.04727173,-0.001876831,0.048614502,0.01461792,0.049072266,0.04650879,0.060791016,0.03265381,0.021820068,0.0005264282,-0.0031929016,0.004673004,0.06573486,-0.030853271,-0.012939453,-0.016479492,0.0022087097,-0.05419922,-0.001209259,-0.025238037,-0.039764404,-0.012275696,0.007434845,-0.02532959,0.021255493,-0.06896973,-0.0026435852,-0.0023727417,0.018493652,-0.013000488,0.007850647,-0.021194458,0.03274536,-0.010978699,0.03012085,0.0043258667,-0.034973145,0.021957397,0.016296387,0.04119873,0.040863037,0.01777649,0.025390625,-0.0006456375,-0.017318726,-0.020996094,0.011489868,-0.0062828064,-0.007972717,0.008415222,0.010093689,-0.022872925,0.0078048706,-0.022399902,0.017120361,-0.054504395,0.04397583,0.014945984,-0.02027893,0.013969421,-0.04309082,-0.012954712,0.020111084,-0.02281189,0.009147644,0.024963379,0.018966675,0.038757324,-0.025146484,-0.03753662,0.0055656433,-0.017471313,-0.031707764,-0.04815674,-0.026062012,0.030151367,-0.032958984,0.020767212,0.037261963,-0.09503174,-0.030700684,-0.04940796,0.014930725,-0.03363037,0.0048179626,-0.010421753,0.023757935,-0.020584106,-0.012580872,-0.019638062,-0.040100098,-0.002878189,0.03427124,-0.026916504,0.048339844,-0.0017032623,0.04071045,0.004295349,0.011360168,0.030288696,0.027954102,0.0028190613,-0.07269287,-0.08178711,-0.014984131,0.008018494,-0.025421143,-0.03955078,0.007888794,0.00048303604,-0.07110596,-0.027908325,-0.0041656494,-0.006511688,-0.03857422,-0.007926941,-0.012397766,0.0062065125,0.005340576,-0.06536865,-0.03793335,-0.020721436,0.059417725,0.034362793,0.008705139,0.04562378,-0.020309448,0.05682373,0.007499695,-0.028244019,-0.042175293,0.016555786,-0.024993896,0.015510559,-0.0022850037,0.0011577606,-0.037628174,0.031463623,0.052825928,0.014152527,-0.010887146,-0.00007277727,-0.053771973,-0.02470398,-0.034118652,0.0053749084,0.009056091,0.013061523,0.044311523,-0.021057129,-0.03967285,0.012260437,0.027404785,0.014022827,0.06124878,0.0030174255,-0.011177063,0.013420105,0.0035209656,-0.035949707,0.043029785,0.023956299,0.012428284,-0.035125732,-0.032348633,0.016174316,0.04046631,-0.02696228,-0.003730774,-0.014892578,0.030410767,0.0017948151,0.025497437,0.02746582,-0.029785156,-0.02180481,-0.034240723,-0.012542725,0.03414917,0.012290955,-0.017684937,-0.048675537,-0.07891846,0.05596924,0.041168213,0.046936035,-0.020233154,0.01737976,-0.019348145,-0.0058517456,-0.060302734,0.047424316,0.07659912,-0.020904541,-0.013053894,0.011276245,-0.009277344,-0.036895752,0.0038871765,-0.0059890747,-0.02067566,-0.02067566,0.010902405,-0.048614502,0.009864807,0.0054740906,0.027313232,0.053619385,-0.017837524,-0.07092285,-0.031463623,0.012550354,0.004550934,-0.034423828,0.0017213821,-0.017471313,0.017944336,0.03475952,0.00844574,0.027938843,-0.007686615,0.011566162,-0.0043258667,-0.017929077,-0.027511597,-0.004055023,0.015113831,0.006210327,-0.07171631,0.004272461,-0.00058555603,0.059692383,-0.048980713,0.031066895,-0.0041389465,0.0008764267,0.059783936,0.008781433,-0.05508423,-0.0026302338,0.017654419,0.030593872,0.042755127,0.009361267,-0.03668213,-0.014381409,0.075927734,-0.01600647,-0.013114929,0.011405945,0.01637268,0.039276123,-0.006717682,-0.06561279,-0.041870117,-0.011054993,-0.03656006,0.018341064,-0.035064697,0.013664246,-0.014785767,-0.010108948,-0.027130127,0.0016307831,-0.029968262,0.016159058,-0.012519836,0.01259613,-0.009963989,-0.009918213,0.0071907043,0.015113831,-0.01979065,0.016418457,0.0357666,0.0016937256,-0.008239746,-0.03326416,-0.03488159,-0.008995056,0.0037002563,0.027511597,0.036895752,0.019424438,0.045318604,-0.038238525,0.030029297,0.033996582,0.030044556,0.033294678,0.0037460327,0.021118164,-0.07122803,-0.05899048,-0.02885437,-0.049041748,0.04144287,0.014526367,-0.010536194,0.058258057,0.0035076141,-0.007080078,-0.024337769,0.023773193,-0.043701172,-0.024612427,0.05215454,-0.013931274,-0.026763916,-0.006832123,0.0026130676,0.007873535,0.041809082,0.005809784,0.015716553,0.07385254,0.04473877,-0.016952515,0.024612427,0.008010864,0.007446289,0.009765625,-0.033569336,-0.032226562,-0.015853882,0.024169922,-0.019729614,-0.01499939,-0.068481445,0.05984497,0.037017822,0.0715332,0.010231018,0.012710571,0.032714844,-0.003648758,0.00868988,-0.015388489,-0.012039185,-0.02407837,-0.050445557,0.026473999,-0.0059509277,-0.0021858215,-0.023895264,0.031829834,-0.0036849976,0.025115967,-0.03201294,0.056915283,0.012306213,-0.0044784546,0.019882202,0.007888794,0.046325684,0.03527832,-0.028198242,0.04058838,0.024032593,-0.038085938,-0.010391235,0.040740967,-0.0009675026,-0.010932922,-0.043701172,-0.02394104,-0.00630188,0.003709793,-0.049621582,-0.011581421,0.010940552,0.023605347,0.036224365,-0.008087158,-0.024414062,0.018234253,-0.016983032,-0.056762695,-0.013977051,-0.03439331,0.013252258,0.061828613,-0.032073975,-0.008155823,0.0045394897,-0.010925293,0.008544922,0.017807007,0.010498047,0.0014047623,-0.047851562,0.008605957,0.010169983,0.009651184,0.025421143,0.038116455,0.026733398,0.011993408,0.043304443,-0.004524231,-0.033081055,-0.06109619,0.009719849,-0.046325684,-0.0043525696,0.0071525574,-0.018081665,-0.0211792,-0.018920898,-0.0135650635,-0.030700684,-0.0012674332,-0.033416748,0.0020046234,0.025527954,-0.01777649,-0.027679443,-0.041229248,-0.016601562,-0.012893677,0.089416504,0.036193848,0.004169464,-0.058166504,-0.023895264,0.025421143,0.006755829,0.008468628,-0.0146484375,0.0030899048,-0.0059127808,-0.029525757,-0.014961243,-0.02772522,0.017654419,-0.0022964478,-0.020324707,0.027389526,0.002773285,0.019104004,-0.013511658,0.009986877,0.04675293,-0.014877319,0.006198883,-0.025177002,0.031829834,-0.00554657,-0.0037631989,-0.051574707,0.04574585,0.0003862381,0.030410767,-0.027618408,0.0056419373,-0.006214142,0.014656067,0.006832123,0.0023860931,-0.019485474,-0.01638794,-0.056762695,-0.06536865,0.042297363,-0.03314209,0.031982422,0.019165039,0.00642395,0.021270752,-0.002445221,-0.013572693,0.0345459,-0.022338867,-0.014007568,-0.031021118,-0.0395813,0.0019798279,-0.013572693,-0.02218628,0.014579773,-0.02255249,0.012367249,-0.0023708344,-0.017120361,0.022094727,0.0004105568,-0.008453369,0.022872925,0.006164551,0.014411926,0.043792725,0.0062713623,-0.038726807,0.027755737,0.0010442734,0.007446289,-0.010856628,0.042510986,0.030929565,-0.011962891,0.00045490265,-0.017929077,-0.008255005,-0.019042969,-0.005332947,0.009338379,0.021194458,0.008384705,-0.032958984,0.020126343,0.0040512085,-0.02078247,-0.018554688,0.014633179,0.023040771,-0.02709961,0.015777588,0.020248413,0.055389404,-0.026519775,-0.00033903122,0.01737976,0.018844604,0.027832031,0.01802063,-0.023345947,0.014907837,-0.015792847,0.016113281,0.006580353,-0.011993408,0.013168335,0.0019664764,0.011947632,0.02267456,0.021881104,-0.022720337,-0.04321289,0.012580872,-0.009689331,-0.011039734,0.02520752,0.03314209,0.007709503,-0.024520874,0.0064315796,0.023925781,-0.03955078,-0.023803711,-0.0007529259,0.044403076,-0.004119873,0.0010004044,0.017990112,0.0055885315,0.04272461,-0.05770874,-0.012168884,0.009094238,0.008995056,-0.02015686,-0.039367676,-0.04598999,0.00081300735,0.042541504,0.0018634796,0.015823364,0.024887085,0.00806427,-0.006160736,0.045532227,0.0017757416,-0.014503479,-0.025604248,-0.03503418,-0.0025482178,-0.0043525696,0.0069389343,-0.02508545,0.005443573,-0.0029792786,-0.038146973,0.010322571,-0.006755829,-0.0025100708,-0.015991211,0.016052246,0.027328491,-0.005859375,0.014556885,-0.009864807,-0.015853882,-0.0056419373,0.000049471855,0.014228821,-0.06213379,0.018295288,-0.023910522,-0.007896423,-0.002155304,0.027877808,0.025421143,0.021713257,-0.0062408447,0.021514893,-0.038482666,0.02696228,-0.045318604,0.009475708,0.01007843,-0.042877197,-0.0062675476,-0.017181396,-0.018997192,0.032348633,-0.020553589,-0.019012451,-0.036590576,-0.033996582,-0.004257202,-0.047790527,0.022506714,0.033325195,0.03604126,-0.02507019,0.0015068054,-0.0075645447,-0.0024337769,-0.013015747,0.010498047,-0.008262634,0.021362305,0.011352539,0.0016384125,-0.0335083,-0.02923584,-0.011001587,0.013290405,-0.031097412,-0.04321289,-0.019119263,0.000057518482,-0.0019760132,0.00011044741,-0.022369385,-0.013847351,-0.0055236816,-0.043029785,0.007835388,0.017929077,0.020080566,0.012863159,-0.017669678,0.009231567,0.017120361,-0.0019207001,0.028717041,0.0025997162,-0.017623901,-0.049102783,0.0034942627,0.040008545,0.023803711,-0.008018494,-0.009765625,-0.0009088516,-0.01448822,-0.052825928,-0.009086609,-0.0003299713,-0.0044784546,-0.009399414,0.008995056,-0.044036865,-0.0059814453,-0.017913818,0.000849247,0.021530151,0.021057129,0.0184021,-0.004512787,0.0048065186,-0.00907135,-0.008987427,-0.029373169,0.028167725,0.010513306,0.005382538,0.015991211,0.05758667,0.0034427643,0.0099487305,-0.003364563,-0.005680084,0.018432617,-0.010681152,-0.0039482117,-0.009208679,0.0009331703,-0.009613037,-0.020477295,-0.03579712,-0.0027046204,0.0869751,-0.0037994385,-0.003944397,-0.021331787,-0.010772705,0.016204834,0.024291992,-0.05355835,0.0057296753,-0.03491211,0.014381409,-0.022338867,0.026321411,0.01802063,0.0068092346,-0.020446777,-0.06665039,-0.012069702,-0.010040283,-0.011634827,-0.060150146,-0.0317688,-0.06738281,-0.00090551376,-0.011711121,-0.026657104,0.005065918,0.018615723,-0.01852417,-0.08685303,-0.008560181,0.046722412,0.0005426407,0.019821167,-0.022003174,0.017578125,0.020431519,-0.040008545,-0.01499939,0.025161743,-0.031433105,-0.008033752,-0.023834229,0.020935059,-0.011634827,-0.027175903,0.013641357,0.011291504,0.0143585205,-0.005592346,-0.0043907166,-0.005695343,0.010688782,-0.012634277,0.015220642,-0.005996704,-0.015464783,0.019744873,-0.049743652,0.0064697266,0.028717041,-0.0005340576,0.009429932,0.021636963,0.029785156,-0.032470703,-0.011558533,0.02947998,0.0060424805,0.035705566,-0.033721924,0.052642822,0.015274048,-0.024627686,0.045440674,0.0047302246,-0.025817871,-0.037628174,-0.021636963,0.022445679,0.0003643036,0.020553589,-0.017120361,-0.0032367706,0.012634277,0.0029411316,0.009521484,-0.017715454,-0.034454346,-0.014518738,0.0038604736,-0.0005993843,-0.01007843,-0.0065612793,0.01096344,0.021972656,0.039154053,0.0049972534,-0.0035305023,0.0061073303,0.02281189,-0.018112183,0.013587952,0.017730713,0.002483368,0.032287598,0.021865845,0.011070251,-0.043060303,-0.010513306,-0.041900635,-0.00705719,0.004798889,-0.011703491,-0.009460449,0.002729416,0.009178162,-0.008964539,-0.017730713,0.015289307,-0.046173096,-0.024795532,-0.0072250366,-0.022613525,0.0043907166,0.0015249252,0.013442993,0.009361267,-0.003648758,0.035217285,0.011871338,-0.013023376,0.017959595,0.029312134,0.021728516,-0.031402588,-0.012382507,-0.011161804,0.00053977966,0.0007071495,-0.019515991,0.018463135,0.042785645,-0.008033752,0.00856781,0.006877899,0.025421143,-0.016418457,0.014854431,0.0007238388,0.0236969,-0.01474762,0.02293396,-0.045166016,0.008308411,0.018188477,-0.014205933,-0.0006132126,-0.0053634644,-0.02470398,0.016159058,-0.00083208084,-0.028015137,0.0463562,0.00033783913,0.02116394,-0.024993896,-0.014762878,-0.0004825592,-0.038757324,-0.023513794,0.039276123,-0.0036258698,-0.008903503,0.015090942,-0.029846191,0.04486084,-0.03164673,0.02003479,-0.0058898926,-0.0008788109,-0.022109985,-0.02571106,-0.019256592,0.0053138733,-0.00881958,-0.0025901794,0.008201599,0.044006348,0.022064209,0.03552246,0.05105591,0.02571106,-0.0024166107,-0.03982544,-0.020248413,-0.0034294128,-0.016784668,0.0043182373,-0.016235352,0.055541992,0.042266846,-0.0012559891,0.031707764,0.03189087,0.037017822,0.0062828064,0.0063667297,-0.005683899,0.0012617111,-0.0023860931,0.02923584,0.0068740845,0.037841797,-0.030227661,0.021408081,0.008087158,0.030700684,-0.024871826,0.021987915,0.07342529,0.020355225,-0.018081665,0.03942871,0.008613586,-0.005092621,-0.006385803,-0.017791748,0.048858643,-0.003501892,0.051971436,0.03463745,0.011993408,-0.0030651093,0.025817871,-0.023651123,-0.015327454,0.05883789,0.03048706,-0.018875122,-0.017654419,0.0009908676,0.005748749,-0.048187256,-0.03111267,0.0052490234,0.003616333,0.01486969,-0.011787415,-0.01373291,-0.024658203,0.024551392,0.023620605,0.006515503,-0.011543274,0.017562866,0.03375244,0.0027866364,0.025146484,-0.002319336,0.025878906,-0.035064697,-0.025878906,0.022247314,0.026947021,-0.013793945,-0.008201599,0.014892578,0.012817383,0.058380127,0.04562378,-0.0014734268,0.014839172,0.019134521,0.013252258,0.0033512115,0.04260254,0.041229248,0.0131073,0.029403687,0.031707764,0.027313232,-0.042938232,0.024978638,-0.003742218,0.00945282,-0.0051956177,-0.01864624,-0.00026583672,-0.011779785,0.016464233,0.008369446,-0.013069153,0.026992798,0.022262573,0.009353638,-0.009208679,-0.003276825,0.012771606,-0.012588501,-0.0033512115,0.0074386597,-0.0048065186,0.023117065,0.0066108704,0.042388916,-0.029037476,0.023849487,-0.010612488,-0.024597168,-0.0028038025,0.024719238,-0.04034424,0.0032920837,-0.014778137,-0.005458832,-0.034851074,0.009162903,0.028305054,-0.013839722,0.035736084,0.008926392,-0.010185242,-0.0045166016,0.030731201,0.009963989,0.005908966,-0.011878967,-0.02482605,0.034210205,0.043182373,0.0057144165,0.007904053,-0.016052246,0.001786232,0.005886078,-0.0234375,0.006252289,-0.009132385,-0.029891968,-0.02331543,0.007270813,0.036499023,0.027130127,0.04071045,-0.010955811,-0.013298035,0.006515503,0.03488159,0.0049438477,0.0002708435,-0.01461792,0.012550354,-0.019577026,0.0423584,0.02116394,0.0068206787,0.022613525,-0.012649536,-0.019897461,0.015014648,-0.019638062,0.019760132,0.0025749207,-0.0015745163,-0.019973755,0.019088745,-0.020553589,-0.031799316,0.0055885315,-0.015060425,-0.024124146,-0.026611328,0.004878998,0.008842468,0.025283813,0.039093018,0.017166138,-0.026107788,0.059631348,-0.020874023,0.04095459,-0.01158905,-0.0010519028,0.043914795,0.037231445,0.025604248,0.01928711,0.014060974,-0.037841797,0.0041999817,0.048339844,0.02482605,0.00843811,0.0012044907,-0.026489258,0.038879395,0.006828308,0.026733398,0.000037312508,0.004360199,0.017471313,-0.015945435,0.0036945343,0.00044345856,-0.0043907166,0.0046653748,0.048614502,-0.038360596,-0.0062217712,-0.02406311,-0.012413025,0.022491455,-0.015014648,-0.0007572174,0.014816284,-0.026992798,0.01725769,-0.021621704,-0.013496399,-0.003112793,0.029342651,-0.029052734,-0.01914978,0.0009665489,0.015670776,-0.02067566,0.032958984,0.006526947,-0.005176544,0.015235901,0.03857422,-0.013847351,0.03463745,-0.027404785,0.016738892,0.032714844,-0.002248764,-0.010765076,0.013153076,-0.0048446655,-0.016830444,0.007827759,0.03387451,-0.017333984,0.0113220215,-0.0008378029,-0.009727478,0.011390686,-0.0020179749,-0.0064430237,0.0039482117,-0.006580353,-0.0077781677,0.0069122314,0.01638794,-0.0026550293,0.006389618,-0.014961243,-0.02268982,-0.0076828003,0.035858154,0.019104004,-0.037384033,-0.0035991669,0.008308411,0.027359009,-0.023712158,-0.0126571655,-0.0021533966,-0.035308838,0.024795532,0.01777649,-0.008804321,0.011894226,-0.013442993,-0.0020046234,0.02041626,0.019424438,0.023757935,-0.0027999878,0.0014209747,0.021987915,-0.036499023,-0.012481689,-0.0013093948,-0.0049476624,0.006877899,0.013900757,-0.0021629333,-0.02305603,0.023788452,-0.0053863525,0.012039185,0.012664795,-0.0075187683,0.017791748,-0.013839722,-0.017822266,0.011688232,0.026184082,-0.008560181,-0.013122559,-0.024871826,0.030288696,0.052947998,-0.02470398,0.0042915344,0.021896362,0.008377075,0.012077332,0.029968262,0.012329102,0.042877197,0.022903442,-0.03189087,-0.027328491,0.03152466,-0.016708374,-0.040161133,0.009429932,-0.0035896301,-0.011398315,0.013809204,0.02230835,-0.004749298,-0.02798462,-0.013587952,-0.009819031,-0.02279663,0.013587952,-0.012420654,0.010787964,-0.03152466,-0.0024967194,0.0074005127,-0.0124053955,-0.038269043,-0.027359009,0.00035214424,-0.0058898926,-0.037017822,0.012252808,-0.015205383,0.00021064281,-0.01524353,-0.009101868,-0.009284973,0.03286743,-0.030914307,-0.006526947,0.006164551,0.022537231,0.020553589,0.0042266846,0.04058838,-0.015327454,-0.025177002,-0.021636963,-0.0029201508,-0.019119263,0.01939392,0.004585266,0.04095459,0.020355225,0.0019369125,-0.0022029877,-0.010978699,-0.008178711,-0.0063323975,-0.030517578,-0.015602112,0.024414062,0.010299683,-0.006801605,-0.007835388,0.03955078,-0.03338623,-0.016784668,0.019760132,0.044555664,0.009941101,0.03302002,-0.02470398,-0.005783081,-0.015205383,0.0016679764,-0.011978149,0.0072898865,0.014839172,-0.0015296936,-0.017837524,0.0041923523,0.028274536,-0.017120361,-0.008834839,0.022613525,-0.0059051514,-0.008644104,0.030517578,0.01676941,0.0065193176,-0.012176514,-0.015792847,0.024917603,0.030044556,0.009155273,0.004886627,0.01184845,0.017440796,-0.016036987,0.008918762,0.02192688,-0.011383057,-0.030471802,-0.02861023,-0.027542114,0.022644043,0.015853882,0.0070762634,-0.004436493,0.019012451,-0.027282715,-0.03161621,-0.021026611,0.018112183,0.0015735626,-0.008026123,-0.010734558,-0.004180908,0.016693115,-0.025405884,0.005367279,-0.040374756,-0.02973938,-0.0015239716,-0.029449463,0.021392822,0.024536133,-0.00092983246,-0.00082445145,0.005344391,-0.0019607544,0.002670288,0.029373169,-0.020355225,-0.006187439,0.030227661,0.01235199,-0.013175964,0.0028438568,-0.0068473816,-0.008354187,0.02357483,-0.00030946732,0.0104904175,-0.023910522,0.031402588,-0.0019159317,-0.0008239746,0.029449463,0.0035057068,0.020401001,-0.030578613,0.016403198,-0.005542755,-0.009468079,0.032287598,-0.027648926,-0.0054626465,0.011299133,-0.026519775,-0.035614014,0.000093221664,0.028930664,0.03970337,-0.0057258606,0.03765869,-0.01802063,-0.022079468,0.018814087,0.009307861,-0.023803711,-0.0054473877,0.051208496,-0.011207581,-0.013198853,-0.005897522,-0.021118164,-0.028320312,-0.0050964355,0.019546509,0.0018129349,-0.005657196,0.030212402,0.0178833,0.047210693,-0.0027885437,0.014839172,0.005050659,-0.00333786,0.02670288,0.013267517,0.04840088,0.0022964478,-0.02822876,0.017852783,0.0019817352,-0.030441284,-0.0075302124,-0.009857178,0.013252258,-0.04812622,0.012908936,-0.0031394958,0.030838013,-0.03253174,0.019973755,-0.027404785,-0.0024547577,-0.033813477,-0.011390686,-0.02999878,0.014175415,0.031799316,0.0005598068,0.019104004,0.010353088,-0.03439331,0.016937256,0.050872803,0.000045359135,-0.035369873,0.01474762,0.011833191,-0.003572464,0.012313843,0.0060272217,-0.0102005005,-0.03817749,0.0090789795,-0.009048462,0.0058021545,0.003686905,0.02406311,0.007270813,-0.0024909973,0.0023994446,0.03137207,-0.0049095154,0.001909256,0.0026474,0.0023269653,0.027023315,0.029220581,-0.011650085,0.010543823,0.029937744,-0.03753662,0.050567627,-0.009567261,0.020889282,-0.019989014,-0.0011405945,-0.04711914,-0.027877808,-0.01927185,0.0035305023],"createdAt":"2026-04-18T18:38:50.191Z","updatedAt":"2026-04-22T10:31:12.937Z","lastSeenAt":"2026-04-22T10:31:12.937Z","tsv":"'/api':165 '/api/v1/generate/resource/35':110,202 '/docs':163 '/pricing':164 '/readme':167 '/request':13,28 '0.02':12,27,86,132,134 '000':127 '20':126 'Base network API' 'USDC API' 'accept':150 'access':7,22,38,116,211 'actual':199 'address':147 'agent':217 'ai/ml':59 'analysi':62 'analyt':58 'api':6,21,37,55,98,115,210 'application/json':156 'avail':193 'base':9,24,94,128 'behind':201 'beyond':205 'broad':48 'call':4,19 'catalog':49 'challeng':122 'classif':64 'commit':105 'connect':173 'content':179 'convers':81 'cost':85 'crawl':196 'data':57 'discov':223 'document':158,188,213 'embed':65 'endpoint':32,84,149 'estim':75 'exact':141 'exampl':192,215 'exchang':70 'expect':225 'experi':221 'extrem':160 'feed':69 'financ':66 'format':227 'function':200 'gas':74 'generat':82 'generic':207 'geocod':79 'host':46 'http':151 'http-post' 'infer':60 'infrastructur':77 'input':226 'json-api' 'key':99 'label':208 'limit':102 'list':112 'lowpaymentfee' 'lowpaymentfee.com':34 'made':137 'materi':197 'maxamountrequir':124 'micropayment API' 'need':219 'network':95 'no-api-key' 'openapi':183 'output':229 'page':168 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':51 'payload':216 'payment':42,135 'per':3,18,53,87 'post':152 'premium':5,20,36,114,209 'premium API' 'price':68 'probe':109 'prompt':175 'protocol':43 'provid':35 'quot':73 'rate':71,101 'render':170 'request':54,88,153 'request/response':186 'resourc':108 'respons':157 'return':118,155 'schema':187 'scheme':142 'sentiment':61 'settl':89 'site':45 'span':56 'spars':161 'spec':184 'specif':107 'specifi':145 'structur':230 'summar':63 'token':72 'unclear':204 'unit':129 'usag':191 'usdc':15,30,91,131,133 'usdc-base' 'util':78 'valid':80,120 'via':10,25,39,138 'wallet':146,174 'web3':67 'without':212 'x402':11,26,41,121,140 'x402 API' 'x402-payment'","prices":[{"id":"7c3d158f-79a7-4e2e-9649-14ab62e2eefb","listingId":"a43ac5c1-ee4b-47c8-b6d7-676dce51da06","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/generate/resource/35","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:50.191Z"}],"sources":[{"listingId":"a43ac5c1-ee4b-47c8-b6d7-676dce51da06","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/35","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:50.191Z","lastSeenAt":"2026-04-22T10:31:12.937Z"}],"details":{"listingId":"a43ac5c1-ee4b-47c8-b6d7-676dce51da06","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/35 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/35"},{"claim":"All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a generic premium API endpoint paid per-call with USDC on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers exploring x402 payment protocol integrations","Agents needing keyless pay-per-request API access on Base","Low-cost per-call usage without subscriptions or rate limits"],"notFor":["Users who need well-documented API contracts and schemas","Production workloads requiring SLA guarantees or support","Anyone needing free or non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:40.624Z"},"updatedAt":"2026-04-22T10:31:12.937Z"}}