{"id":"aa7dfebd-8293-4355-8545-2a784c79e370","shortId":"5VHwdA","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/generate/resource/134` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made via the x402 `X-PAYMENT` header with the `exact` scheme — no API keys, subscriptions, or rate limits are required.\n\nThe broader platform advertises four endpoint 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 listed endpoints share the same $0.02 per-request pricing. However, the specific resource `/api/v1/generate/resource/134` does not clearly map to any of the named endpoints on the landing page, so its exact functionality is uncertain.\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 spec, no request/response schema, and no usage examples available from the crawl. The endpoint is confirmed live (returns a valid 402 challenge), but without documentation it is difficult to determine what data or service this specific resource provides.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","json-response","post-method","no-api-key","no-rate-limit"],"categories":["utility","api-marketplace"],"synonyms":["x402 API","micropayment API","pay-per-request API","Base USDC API","lowpaymentfee","402 payment endpoint","crypto-gated API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema definition found; request and response formats are unknown.","The resource path /api/v1/generate/resource/134 does not correspond to any named endpoint on the landing page; its exact functionality is unclear.","The platform lists many endpoint categories but it is unknown whether they are all functional or placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/134","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/134","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific resource ID 134 does not map to any named endpoint on the landing page, making its purpose unclear. 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":"2026-04-18T23:05:38.187Z","embedding":[-0.03149414,-0.011436462,0.03970337,0.017318726,0.0024547577,-0.025421143,-0.029174805,-0.0004887581,0.07244873,-0.07116699,0.027404785,-0.043304443,-0.027191162,-0.030227661,-0.021530151,0.007205963,-0.02760315,-0.0018234253,-0.04724121,0.03189087,0.049835205,-0.016906738,-0.02947998,0.037017822,-0.0060310364,-0.0116119385,0.013046265,0.003227234,-0.026016235,-0.0287323,0.02911377,-0.029266357,-0.013504028,-0.0017986298,-0.0011005402,-0.02142334,0.016647339,0.031311035,0.026611328,0.0074424744,-0.010910034,-0.060668945,0.011672974,-0.002439499,-0.052001953,-0.0069084167,0.020080566,-0.02973938,-0.011222839,-0.01576233,-0.02545166,-0.0121536255,-0.015716553,0.019729614,0.0032672882,0.016296387,-0.023727417,-0.028625488,0.005207062,0.014793396,0.006099701,-0.043121338,0.0027484894,0.004798889,0.009757996,0.045715332,-0.003932953,0.041259766,0.008720398,0.062194824,0.029449463,0.045288086,0.03555298,0.0031394958,0.004306793,-0.020431519,-0.0012302399,0.051483154,-0.03729248,-0.006713867,-0.012191772,0.008972168,-0.057128906,-0.021621704,-0.022262573,-0.07421875,-0.000770092,0.008918762,-0.030059814,0.0413208,-0.07757568,-0.014625549,-0.00043702126,0.013839722,-0.032592773,-0.0070114136,-0.009559631,0.020874023,0.0077934265,0.01576233,-0.0055618286,-0.0463562,0.019638062,0.016586304,0.05142212,0.028747559,0.002664566,0.03036499,0.0058631897,-0.02670288,-0.02671814,-0.0004618168,-0.012306213,-0.005886078,-0.005340576,-0.00340271,-0.0107040405,0.025726318,-0.016403198,0.023956299,-0.06866455,0.05923462,0.022247314,-0.0006599426,-0.0012693405,-0.03829956,-0.010391235,0.018051147,-0.04333496,-0.0058555603,0.04156494,0.019760132,0.022018433,-0.025924683,-0.03741455,0.0041503906,-0.01789856,-0.03591919,-0.05340576,-0.011833191,0.028549194,-0.034423828,0.01675415,0.033203125,-0.09301758,-0.008903503,-0.047180176,0.019729614,-0.03286743,-0.0017957687,0.02154541,0.024627686,-0.020996094,-0.03866577,-0.010292053,-0.04510498,-0.016906738,0.04196167,-0.017944336,0.031677246,-0.009544373,0.03665161,0.0076904297,0.009399414,0.005207062,0.0357666,-0.008308411,-0.099731445,-0.090026855,-0.025161743,0.004940033,-0.0073890686,-0.035888672,0.0076560974,-0.004322052,-0.07110596,-0.029632568,-0.013504028,0.015258789,-0.054534912,-0.005077362,-0.02130127,-0.008872986,-0.00945282,-0.047210693,-0.025878906,-0.02166748,0.038391113,0.027038574,0.012268066,0.012710571,0.0016374588,0.06939697,0.021575928,-0.013221741,-0.03640747,0.011940002,-0.01991272,0.06439209,0.001832962,0.015930176,-0.038146973,0.040496826,0.04058838,0.005126953,-0.014259338,-0.0028190613,-0.05130005,-0.03677368,-0.031677246,0.012908936,0.0004131794,-0.01361084,0.03439331,-0.019943237,-0.029067993,0.018508911,0.027755737,0.021606445,0.06878662,0.0024814606,0.024230957,-0.003194809,0.01914978,-0.03643799,0.049438477,0.022842407,0.012557983,-0.01838684,-0.0211792,0.0284729,0.052124023,-0.035461426,-0.004016876,-0.026107788,0.018127441,-0.0010509491,-0.004058838,0.036102295,-0.014831543,-0.013801575,-0.03338623,-0.02734375,0.030654907,0.011413574,-0.027374268,-0.0463562,-0.080078125,0.04333496,0.047943115,0.02973938,0.0006723404,0.0037403107,-0.0011539459,-0.013389587,-0.068237305,0.028823853,0.06951904,-0.0112838745,-0.013923645,0.030075073,0.0004785061,-0.049865723,0.007160187,-0.0058288574,-0.020965576,-0.021270752,0.016555786,-0.052124023,0.0018835068,0.021636963,0.034973145,0.03967285,-0.02154541,-0.055786133,-0.02961731,0.0011339188,0.0028858185,-0.042236328,-0.00023055077,-0.0079422,0.018951416,0.048980713,0.02079773,0.016464233,0.010025024,0.020645142,-0.004688263,-0.005241394,-0.029220581,-0.008720398,0.00680542,0.004497528,-0.064941406,0.017471313,0.004623413,0.07574463,-0.049591064,0.02609253,-0.011543274,0.034240723,0.030288696,-0.004184723,-0.046661377,-0.012954712,0.021499634,0.031829834,0.04071045,0.01058197,-0.005683899,-0.022018433,0.048980713,-0.024856567,-0.014984131,0.0030918121,0.032989502,0.0574646,0.010559082,-0.056152344,-0.04598999,-0.009857178,-0.028305054,0.03543091,-0.039520264,0.020965576,-0.0049552917,0.0134887695,-0.016799927,0.008605957,-0.04208374,0.01574707,-0.018707275,0.003753662,-0.009635925,-0.029693604,-0.0023269653,0.02279663,-0.006164551,0.0023727417,0.025268555,0.008583069,-0.014556885,-0.020492554,-0.030548096,-0.023651123,-0.024429321,0.0072517395,0.023727417,0.029953003,0.041381836,-0.036102295,0.0073623657,0.01689148,0.0069999695,0.017944336,0.0019207001,0.010139465,-0.059783936,-0.05984497,-0.02508545,-0.044433594,0.034454346,0.0103302,-0.0027198792,0.04562378,-0.00868988,-0.012908936,-0.026565552,0.020523071,-0.033813477,-0.021759033,0.048980713,-0.025619507,-0.044281006,0.016464233,-0.010955811,0.0031585693,0.037506104,0.01272583,0.0149383545,0.07647705,0.029434204,0.0039596558,0.009239197,0.022659302,0.023880005,-0.0059280396,-0.028747559,-0.03857422,-0.018875122,0.021133423,-0.03878784,-0.03274536,-0.06335449,0.05340576,0.027297974,0.06994629,-0.014808655,0.018615723,0.024368286,-0.0062561035,0.019256592,-0.016525269,-0.009483337,-0.018356323,-0.049987793,0.02583313,0.0035800934,-0.0052986145,-0.028823853,0.026382446,-0.0022068024,0.0099105835,-0.02243042,0.0637207,-0.02368164,0.008102417,0.006175995,0.0028800964,0.05532837,0.037628174,-0.059906006,0.010131836,0.018432617,-0.019882202,-0.006286621,0.028701782,0.00894165,-0.022109985,-0.047729492,-0.023971558,-0.0061912537,-0.011772156,-0.058441162,0.0038146973,0.0034446716,0.024230957,0.009841919,0.0049095154,-0.011413574,0.01675415,-0.0013999939,-0.05960083,0.0028476715,-0.056762695,0.018234253,0.042388916,-0.037139893,0.0013933182,-0.0154953,-0.013618469,0.0051651,0.028198242,0.002357483,-0.0013475418,-0.052337646,0.03277588,0.00598526,0.0066566467,0.024139404,0.042419434,0.044769287,0.0071868896,0.04360962,0.011917114,-0.042114258,-0.062042236,0.011810303,-0.042663574,-0.011444092,0.00093126297,-0.022628784,-0.0008034706,-0.007499695,-0.023620605,-0.015205383,0.01272583,-0.03805542,0.00050878525,0.02947998,-0.038757324,-0.034698486,-0.044891357,-0.025543213,-0.012809753,0.07940674,0.005706787,0.008804321,-0.053009033,-0.01576233,0.024551392,0.0029735565,0.029815674,-0.0146102905,-0.008811951,-0.013046265,-0.03466797,-0.029769897,-0.037109375,0.035095215,-0.0055770874,-0.012870789,0.020645142,0.002696991,0.0068969727,-0.013168335,-0.003063202,0.029144287,-0.020446777,-0.015548706,-0.025405884,0.017288208,-0.00058221817,-0.003435135,-0.02796936,0.054901123,0.0076293945,0.05343628,-0.039642334,0.0034484863,-0.008605957,0.015289307,0.011634827,-0.0056114197,-0.021835327,-0.0013017654,-0.041259766,-0.060577393,0.029373169,-0.022842407,0.025512695,0.023956299,0.0036239624,0.038360596,-0.02116394,0.0039405823,0.018432617,-0.034576416,-0.01637268,-0.036132812,-0.031341553,-0.0046157837,0.004470825,-0.02116394,0.01473999,-0.019592285,0.007637024,-0.020462036,-0.020629883,0.04019165,0.019561768,-0.011917114,0.035949707,0.008773804,0.003610611,0.04425049,0.017105103,-0.04034424,0.030883789,-0.0073890686,0.0048446655,-0.0014095306,0.05239868,0.028564453,-0.022109985,-0.012901306,-0.019500732,-0.0069274902,-0.015533447,-0.022384644,0.0146484375,0.018051147,0.014373779,-0.024368286,0.025741577,0.009376526,-0.030181885,-0.024093628,0.022415161,0.02520752,-0.03970337,0.013999939,0.019546509,0.05218506,-0.03640747,0.0016336441,0.0013790131,0.040252686,0.022918701,0.0071029663,-0.011260986,0.012954712,-0.041412354,0.0015735626,0.005859375,-0.017333984,0.019577026,0.009269714,0.019622803,0.034576416,0.020050049,-0.0289917,-0.04525757,0.008590698,-0.0053367615,-0.010185242,0.03338623,0.028030396,0.010177612,-0.025283813,0.011276245,0.035125732,-0.040039062,-0.012794495,-0.005176544,0.04876709,-0.0012569427,0.004169464,0.019439697,0.005809784,0.021743774,-0.061187744,-0.019607544,0.0040397644,0.015159607,-0.020355225,-0.05065918,-0.047058105,-0.01727295,0.0362854,0.007987976,0.009246826,0.022232056,0.00056123734,-0.0028762817,0.031021118,-0.0026741028,-0.0010318756,-0.022491455,-0.050994873,-0.017562866,-0.010864258,0.0034503937,-0.029251099,0.012069702,-0.020614624,-0.03152466,0.0124435425,-0.011940002,0.00592041,-0.008354187,0.01725769,0.028930664,0.0023517609,0.032226562,-0.010032654,-0.02229309,-0.0020523071,0.0006747246,0.029251099,-0.04071045,0.027420044,-0.01436615,-0.012069702,-0.001335144,0.028411865,0.01663208,0.024765015,-0.0060043335,0.03338623,-0.025512695,0.031066895,-0.030883789,-0.0007033348,-0.0054512024,-0.027496338,-0.012878418,-0.023391724,-0.024658203,0.0362854,-0.025497437,-0.002105713,-0.02961731,-0.03186035,-0.007247925,-0.043762207,0.018478394,0.033325195,0.045074463,-0.03817749,-0.003768921,0.011428833,0.005428314,-0.013389587,0.00086832047,-0.0030555725,0.026031494,0.028045654,-0.0024375916,-0.03186035,-0.030944824,-0.0010061264,0.015350342,-0.03488159,-0.042114258,-0.011306763,0.0060806274,0.0031661987,0.00097322464,-0.018844604,-0.020339966,-0.014427185,-0.029037476,0.009864807,0.0016355515,0.020523071,0.018722534,-0.026397705,0.01335144,0.026779175,-0.0289917,0.013465881,-0.01423645,-0.027114868,-0.062927246,0.0057792664,0.045196533,0.011154175,-0.005874634,-0.03869629,0.010215759,-0.018356323,-0.049591064,0.00056123734,-0.0107421875,0.00014388561,-0.0030612946,0.0014810562,-0.047851562,-0.0074691772,-0.0236969,0.0072784424,0.0128479,0.017715454,0.011001587,-0.0036697388,0.009994507,-0.006061554,-0.0074424744,-0.024856567,0.021820068,0.010383606,0.002128601,0.018005371,0.043518066,0.013969421,-0.00010854006,-0.0034770966,-0.008506775,0.025100708,-0.014533997,0.010528564,-0.013244629,0.000426054,-0.0027980804,-0.011940002,-0.026290894,-0.008613586,0.0579834,0.0011711121,0.011413574,-0.0043792725,-0.015159607,0.016098022,0.036132812,-0.047058105,0.0024662018,-0.040161133,0.023971558,-0.013259888,0.017181396,-0.0010757446,0.011138916,-0.01651001,-0.052825928,-0.005908966,0.0015182495,0.013801575,-0.07611084,-0.03338623,-0.064819336,0.012496948,-0.016815186,-0.025817871,-0.0005555153,0.009811401,-0.024871826,-0.08111572,-0.0044059753,0.053771973,0.000082433224,0.021499634,-0.01889038,0.032287598,0.030181885,-0.030731201,-0.010429382,0.019348145,-0.013572693,-0.022491455,-0.01940918,0.040618896,-0.0074920654,-0.029525757,0.0030441284,0.036468506,0.022628784,-0.006134033,0.02255249,-0.009780884,0.0028762817,-0.006477356,0.009513855,-0.00020837784,-0.012161255,0.031799316,-0.054107666,0.020584106,0.023605347,0.015625,0.0013341904,0.01725769,0.03302002,-0.0418396,-0.010292053,0.045166016,0.02406311,0.040283203,-0.023605347,0.045135498,0.016860962,-0.010383606,0.022994995,-0.00025558472,-0.01878357,-0.031585693,-0.030395508,0.01209259,0.015235901,0.016281128,-0.014961243,-0.0127334595,0.033294678,0.007221222,0.00043058395,-0.026229858,-0.0119018555,-0.015388489,0.008850098,0.007648468,0.0017404556,0.0077552795,0.013763428,0.037261963,0.03363037,-0.00037693977,-0.013877869,0.005882263,0.0385437,-0.013053894,0.001045227,0.011100769,0.017211914,0.039093018,0.023635864,0.023956299,-0.03668213,-0.021057129,-0.030410767,-0.009399414,-0.00093364716,-0.019851685,0.0104599,0.00712204,0.012886047,-0.0019168854,-0.025848389,0.0010614395,-0.044403076,-0.027633667,-0.012908936,-0.016235352,0.014533997,0.012687683,0.0026378632,0.009185791,-0.005657196,0.040618896,-0.011039734,-0.019058228,0.025650024,0.032684326,0.026153564,-0.041381836,-0.013595581,-0.021652222,-0.01184845,0.005104065,-0.015113831,0.015960693,0.04296875,-0.009117126,0.0055885315,0.008140564,0.014060974,-0.0063667297,0.020446777,0.00044727325,0.023666382,-0.020187378,0.029403687,-0.047210693,0.017440796,0.028808594,0.0053215027,0.014556885,-0.009773254,-0.023162842,0.016403198,-0.0033817291,-0.008628845,0.04534912,-0.0044670105,0.015365601,-0.027755737,-0.027786255,-0.00010639429,-0.023742676,-0.029403687,0.024795532,-0.0138168335,-0.002588272,-0.0031719208,-0.032989502,0.036224365,-0.04537964,0.0042533875,0.00869751,0.0041999817,-0.014350891,-0.029708862,0.0009384155,0.0042495728,-0.015930176,0.0015554428,-0.0032234192,0.036834717,0.0345459,0.025650024,0.024505615,0.018493652,-0.0008788109,-0.04486084,-0.020477295,0.0032482147,-0.020980835,0.008453369,-0.032989502,0.05117798,0.04663086,0.014808655,0.039916992,0.029846191,0.031829834,-0.005657196,0.00712204,-0.009414673,0.02520752,-0.02027893,0.017120361,-0.0023994446,0.036743164,-0.031433105,0.02218628,-0.005531311,0.023971558,-0.026748657,0.018844604,0.07080078,0.030288696,-0.0038604736,0.035949707,-0.0043525696,0.0090789795,-0.01637268,-0.024658203,0.049346924,-0.015533447,0.04248047,0.023010254,-0.0004079342,0.0042152405,0.016357422,-0.01612854,-0.004512787,0.052703857,0.023071289,-0.01977539,-0.0022792816,-0.004070282,-0.00052547455,-0.03829956,-0.017791748,0.018569946,0.0074806213,0.018997192,-0.021133423,-0.0058937073,-0.02456665,0.010185242,-0.0005788803,-0.003753662,-0.0033054352,0.009376526,0.021209717,-0.0041885376,0.023422241,0.00095033646,0.019180298,-0.0362854,-0.021743774,0.016952515,0.015312195,-0.00076532364,-0.0039253235,0.018737793,0.022537231,0.048583984,0.027496338,-0.01725769,-0.010139465,0.0073509216,0.024810791,0.012031555,0.041992188,0.0289917,0.0126571655,0.027496338,0.03967285,0.018661499,-0.037872314,0.02178955,-0.002702713,0.0075569153,-0.011917114,-0.016418457,-0.00028443336,-0.009918213,0.008728027,0.015335083,-0.0027236938,0.0284729,0.020507812,-0.010017395,0.0043907166,0.008979797,0.017150879,-0.0054969788,-0.0046310425,0.007232666,-0.013153076,0.017089844,0.013618469,0.044708252,-0.029403687,0.031021118,0.009735107,-0.025970459,-0.003326416,0.016067505,-0.032592773,-0.00409317,-0.0047912598,-0.011627197,-0.030960083,0.014884949,0.006462097,-0.00053834915,0.023132324,0.008666992,-0.023925781,-0.008666992,0.028778076,0.01499939,0.0064086914,-0.011291504,-0.019729614,0.03137207,0.04699707,-0.0030612946,-0.01134491,-0.031829834,0.016555786,0.009399414,-0.016845703,-0.0049858093,0.012466431,-0.011680603,-0.016723633,0.010108948,0.028961182,0.026824951,0.04171753,-0.02078247,-0.0110321045,0.003107071,0.025863647,0.010612488,0.009239197,0.0040779114,0.017089844,-0.022781372,0.04510498,0.015571594,0.011405945,0.009902954,-0.012374878,-0.007221222,-0.0006070137,-0.02331543,0.029663086,-0.015144348,0.0067329407,-0.00680542,0.019607544,-0.024749756,-0.040130615,0.010528564,-0.01802063,-0.024139404,-0.022232056,0.018493652,0.0065727234,0.029373169,0.030654907,0.039276123,-0.016220093,0.06161499,-0.018829346,0.05407715,-0.009384155,-0.016021729,0.061340332,0.04046631,0.03137207,-0.00056028366,-0.00077581406,-0.026046753,-0.00289917,0.042755127,0.027526855,0.013618469,-0.0061950684,-0.019683838,0.034240723,-0.0104599,0.028778076,0.0078125,0.0008773804,0.015571594,-0.02029419,-0.005016327,-0.0054016113,-0.0010786057,0.014205933,0.07141113,-0.03488159,-0.009056091,-0.025222778,-0.005947113,0.019729614,-0.013000488,0.0119018555,0.0067443848,-0.032226562,0.014831543,-0.019622803,-0.0098724365,0.0055007935,0.021942139,-0.0418396,-0.013046265,0.010276794,0.022338867,-0.036743164,0.033599854,0.012290955,-0.005836487,0.018112183,0.033721924,-0.0030517578,0.04434204,-0.020065308,0.028045654,0.04876709,0.006790161,-0.007904053,0.0021266937,-0.0019779205,-0.00566864,0.009513855,0.029327393,-0.0055732727,0.018310547,0.009552002,0.0052108765,0.0029525757,0.0045547485,-0.015075684,0.0018959045,-0.005870819,-0.00349617,0.006752014,0.011367798,-0.005004883,0.0005159378,-0.005241394,-0.02670288,-0.014625549,0.025527954,0.012687683,-0.049316406,-0.0035915375,0.027740479,0.01424408,-0.022323608,-0.009841919,-0.013595581,-0.03152466,0.015571594,0.041015625,0.0046195984,0.007499695,-0.019378662,-0.00010460615,0.027038574,0.020339966,0.02104187,0.008163452,-0.009223938,0.011016846,-0.03857422,-0.0050086975,-0.0031776428,-0.010169983,0.016021729,0.02217102,0.0068969727,-0.024246216,0.014038086,-0.0028419495,0.01159668,0.003118515,-0.0027065277,0.01940918,-0.002937317,-0.010292053,0.008354187,0.023529053,-0.02017212,-0.008140564,-0.023727417,0.023956299,0.048980713,-0.02178955,0.0052871704,-0.003189087,0.016723633,0.02281189,0.018859863,0.006881714,0.029953003,0.01953125,-0.0077934265,-0.036132812,0.016601562,-0.014976501,-0.03652954,0.019989014,-0.005332947,-0.016784668,0.012466431,0.008026123,0.000644207,-0.022705078,-0.014717102,-0.010528564,-0.022659302,0.026229858,-0.0070381165,0.014755249,-0.042541504,0.0013313293,0.021957397,-0.020141602,-0.0357666,-0.018844604,-0.007091522,-0.019470215,-0.053955078,0.0026988983,-0.018234253,0.0051651,-0.030136108,0.012313843,-0.0030384064,0.029632568,-0.016021729,0.009246826,0.0005221367,0.03363037,0.017303467,0.0017414093,0.03125,-0.009475708,-0.013710022,-0.0036716461,-0.0061454773,-0.01121521,0.0055656433,-0.011276245,0.046875,0.010192871,-0.01260376,0.004005432,-0.01159668,-0.008201599,-0.008506775,-0.028305054,-0.023162842,0.025115967,0.01486969,-0.020370483,-0.006126404,0.041137695,-0.02468872,-0.017532349,0.018478394,0.043121338,0.011238098,0.039916992,-0.013191223,0.0007843971,-0.02394104,0.009384155,-0.0146484375,0.006916046,0.010528564,0.002532959,-0.010795593,0.009849548,0.017959595,-0.015838623,0.00039577484,0.019760132,0.014625549,-0.0011501312,0.0362854,0.030838013,0.010360718,-0.019943237,-0.00869751,0.025909424,0.048797607,0.00096178055,0.014259338,0.008041382,0.021087646,-0.0079574585,0.009223938,0.013725281,-0.015533447,-0.037597656,-0.013450623,-0.013961792,0.023712158,0.003698349,0.01158905,-0.01184845,0.0184021,-0.0017271042,-0.031204224,-0.021621704,0.0284729,-0.0012702942,-0.021484375,-0.01033783,0.005760193,0.010368347,-0.030059814,-0.0025901794,-0.05505371,-0.02671814,-0.01878357,-0.027999878,0.015571594,0.0065231323,-0.006954193,0.0033664703,0.0011129379,-0.0090408325,0.003932953,0.030136108,-0.0026779175,-0.015625,0.017364502,0.025238037,0.0014400482,0.0090408325,0.0050201416,-0.008384705,0.016540527,-0.0022583008,0.016906738,-0.03933716,0.031097412,0.005458832,-0.0028247833,0.028366089,-0.0042762756,0.026748657,-0.022888184,-0.0124435425,-0.0184021,-0.006965637,0.03149414,-0.02166748,-0.021774292,-0.00040197372,-0.014259338,-0.03237915,0.0104599,0.026855469,0.030471802,-0.018844604,0.045288086,-0.014884949,0.0028362274,0.009399414,0.00881958,-0.016998291,-0.00248909,0.027160645,-0.012184143,-0.0049476624,-0.0037174225,-0.013046265,-0.028259277,-0.014022827,0.016815186,-0.008361816,-0.009719849,0.016830444,0.018295288,0.037597656,-0.015258789,0.021560669,0.021713257,0.012580872,0.03439331,0.007610321,0.035247803,0.009803772,-0.027267456,-0.0066986084,0.0075531006,-0.023849487,0.0048942566,-0.0068359375,0.016448975,-0.0368042,0.0037250519,-0.0022888184,0.024734497,-0.023040771,0.01348114,-0.019378662,-0.00818634,-0.03390503,0.0041236877,-0.042999268,-0.0009908676,0.040985107,0.009346008,0.014099121,0.005458832,-0.028884888,0.0362854,0.054473877,0.0028972626,-0.040008545,0.008911133,0.0001232624,-0.017608643,-0.0005283356,-0.00037169456,-0.022460938,-0.021652222,-0.0072669983,-0.011833191,-0.0007519722,-0.004600525,0.039855957,0.0034599304,-0.00491333,-0.0070114136,0.02128601,-0.0028495789,0.005138397,-0.0021877289,-0.011253357,0.027114868,0.040100098,-0.018722534,0.0049972534,0.029586792,-0.035491943,0.045837402,-0.00793457,0.01751709,-0.016433716,0.006088257,-0.045959473,-0.012161255,-0.009437561,0.006713867],"createdAt":"2026-04-18T18:37:20.971Z","updatedAt":"2026-04-23T13:30:32.487Z","lastSeenAt":"2026-04-23T13:30:32.487Z","tsv":"'/api':194 '/api/v1/generate/resource/134':67,167 '/docs':193 '/pricing':195 '/readme':197 '/request':17,34 '0.02':16,33,78,158 '000':82 '20':81 '402':234 '402 payment endpoint' '6':88 'Base USDC API' 'access':45,73 'advertis':116 'ai':10,27,127 'analysi':131 'analyt':121 'api':4,21,41,72,105 'avail':222 'base':7,24,61,83 'behind':51 'broader':114 'call':80 'categori':119 'challeng':235 'classif':134 'clear':170 'confirm':229 'connect':203 'content':209 'convers':150 'cost':75 'crawl':225 'crypto-gated API' 'data':9,26,120,124,245 'decim':89 'determin':243 'difficult':241 'document':188,238 'embed':135 'endpoint':14,31,50,65,118,154,177,227 'estim':145 'exact':102,184 'exampl':221 'exchang':140 'export':125 'extrem':190 'feed':139 'financ':11,28,136 'four':117 'function':185 'gas':144 'gate':3,20,44 'generat':151 'geocod':148 'header':99 'howev':163 'infrastructure/utilities':147 'insight':126 'json-response' 'key':106 'land':180 'learn':129 'limit':110 'list':69,153 'live':230 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':128 'made':92 'map':171 'marketplac':42 'metric':122 'micropay':55 'micropayment API' 'name':176 'network':62 'no-api-key' 'no-rate-limit' 'offer':8,25 'openapi':213 'page':181,198 'pay-per-request API' 'payment':90,98 'per':53,79,160 'per-request':52,159 'per-request-micropayment' 'platform':5,22,115 'post-method' 'premium':71 'price':138,162 'prompt':205 'protocol':40 'provid':251 'quot':143 'rate':109,141 'render':200 'report':123 'request':54,161 'request/response':216 'requir':112 'resourc':166,250 'return':231 'schema':217 'scheme':103 'sentiment':130 'servic':247 'settl':56 'share':155 'spars':191 'spec':214 'specif':64,165,249 'subscript':107 'summar':133 'text':132 'token':142 'uncertain':187 'unit':84 'usag':220 'usdc':58,86 'usdc-base' 'util':13,30 'valid':149,233 'varieti':48 'via':93 'wallet':204 'web3':137 'without':237 'x':97 'x-payment':96 'x402':2,19,39,95 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"361f45fa-0e93-4bf0-adbc-3e323ea1dd81","listingId":"aa7dfebd-8293-4355-8545-2a784c79e370","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/134","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:20.971Z"}],"sources":[{"listingId":"aa7dfebd-8293-4355-8545-2a784c79e370","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/134","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:20.971Z","lastSeenAt":"2026-04-23T13:30:32.487Z"}],"details":{"listingId":"aa7dfebd-8293-4355-8545-2a784c79e370","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/134 \\\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 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/134"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/134"},{"claim":"All listed endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to utility/generation endpoints without API key management","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Exploring x402 protocol integration for per-request payment flows"],"bestFor":["Developers experimenting with x402 micropayment protocol","Agents that can sign USDC payments on Base for per-call access","Use cases where avoiding API key provisioning and subscriptions is preferred"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch workloads where per-request payment overhead is impractical","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.207Z"},"updatedAt":"2026-04-23T13:30:32.487Z"}}