{"id":"21a97e70-fce4-4df4-87fd-8d6590d146ca","shortId":"EGqRF4","kind":"x402","title":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","tagline":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints gated by the x402 payment protocol on the Base network. This specific endpoint (`/api/v1/benefits/80`) is listed as \"Premium API Access\" and accepts payment in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com 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 uniformly priced at $0.02 per request.\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 schema, no request/response examples, and no description of what the `/api/v1/benefits/80` endpoint actually returns. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what data or functionality \"Premium API Access\" provides beyond the generic label.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","no-rate-limit","json-response"],"categories":["api-gateway","misc"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","base network api","usdc api access","premium api"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The purpose of /api/v1/benefits/80 ('Premium API Access') is entirely unclear","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/80","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/benefits/80","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 challenge, but there is zero documentation on what it actually does or returns. No OpenAPI schema, no request/response examples, and the /docs page is empty. The 'Premium API Access' label is completely generic. 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":"2026-04-19T17:48:31.816Z","embedding":[-0.014045715,-0.03012085,0.049804688,0.020584106,0.023864746,-0.022003174,-0.031829834,0.037719727,0.06945801,-0.061645508,0.0335083,-0.049316406,-0.024383545,-0.03692627,-0.026290894,0.02029419,0.0042533875,0.0026302338,-0.04852295,0.036956787,0.031982422,-0.009361267,-0.014717102,0.038024902,0.008079529,-0.022918701,-0.007461548,-0.011543274,-0.015556335,-0.038024902,0.04031372,-0.026550293,-0.004852295,0.011909485,-0.0110321045,-0.01247406,0.0038852692,0.0440979,0.03491211,-0.014434814,-0.00029945374,-0.051452637,0.010192871,-0.0017471313,-0.052337646,0.00033068657,0.015396118,-0.021408081,-0.005508423,0.008262634,-0.046173096,0.00097465515,-0.0055656433,-0.010185242,0.0126571655,0.014434814,-0.0058135986,-0.008720398,-0.0028686523,0.002527237,-0.0076446533,-0.05697632,-0.017181396,0.0045166016,-0.001253128,0.058380127,-0.0107803345,0.033416748,0.016830444,0.05947876,0.04434204,0.072631836,0.043518066,0.019210815,0.00033903122,-0.00881958,0.00047636032,0.0541687,-0.0003566742,-0.005683899,-0.010925293,-0.0044021606,-0.04876709,0.00032877922,-0.009780884,-0.045776367,-0.025436401,0.0074691772,-0.018737793,0.02659607,-0.07116699,-0.010047913,-0.024841309,0.0032424927,0.019195557,-0.0036964417,-0.01852417,0.028411865,-0.009429932,0.014556885,-0.0067443848,-0.040527344,0.015594482,0.010597229,0.048553467,0.058502197,0.027908325,0.019073486,0.012130737,-0.016464233,-0.024658203,0.017822266,-0.01448822,-0.0039100647,0.006214142,0.003194809,-0.02760315,0.014465332,-0.007835388,0.022506714,-0.045043945,0.048706055,0.021347046,-0.020080566,0.0079193115,-0.047668457,-0.0056762695,0.015609741,-0.023086548,-0.014183044,0.025787354,0.01576233,0.043273926,-0.010276794,-0.039031982,0.014785767,-0.004558563,-0.024856567,-0.041656494,-0.028335571,0.03338623,-0.034301758,0.031219482,0.027023315,-0.092285156,-0.0035896301,-0.042633057,0.0075645447,-0.029663086,0.00012886524,-0.024276733,0.020507812,-0.027526855,-0.009109497,-0.028869629,-0.026657104,0.006916046,0.032165527,-0.015571594,0.046539307,-0.012252808,0.016723633,0.013320923,0.003704071,0.03741455,0.040405273,0.00000590086,-0.0725708,-0.08935547,-0.032073975,-0.0024814606,-0.014312744,-0.034423828,0.0061531067,0.012229919,-0.066467285,-0.0138168335,-0.01159668,0.0065345764,-0.051757812,0.0044784546,-0.026153564,0.019927979,-0.0049057007,-0.07080078,-0.03378296,-0.032684326,0.074523926,0.017211914,0.025238037,0.026367188,-0.0129470825,0.059570312,0.014785767,-0.020721436,-0.03451538,0.012329102,-0.021575928,0.014976501,0.0069770813,0.0017356873,-0.03326416,0.043762207,0.06137085,0.014137268,-0.016159058,-0.00066280365,-0.05444336,-0.041381836,-0.03555298,0.0025939941,0.015449524,0.0087509155,0.04159546,-0.0234375,-0.03543091,0.0028896332,0.007835388,0.021835327,0.066101074,0.009559631,-0.009643555,0.024917603,0.01902771,-0.04537964,0.035125732,0.03866577,0.022140503,-0.029541016,-0.03414917,0.027435303,0.03982544,-0.022476196,0.007843018,-0.018737793,0.02734375,0.0013666153,0.012413025,0.026992798,-0.018112183,-0.015945435,-0.03137207,-0.011665344,0.038146973,0.0062294006,-0.031829834,-0.04510498,-0.059631348,0.040283203,0.03942871,0.042510986,-0.0015525818,0.011123657,-0.03451538,-0.020690918,-0.07373047,0.058013916,0.082336426,-0.012550354,-0.0054893494,0.014007568,-0.008430481,-0.02935791,-0.01071167,-0.014450073,-0.018722534,-0.023025513,0.010269165,-0.043518066,0.013076782,0.018325806,0.028930664,0.058380127,-0.0073928833,-0.036071777,-0.015007019,0.013786316,0.0026359558,-0.029174805,-0.002325058,-0.0024604797,0.017196655,0.028198242,-0.008094788,0.03086853,-0.010650635,0.0043525696,0.0035419464,-0.0021953583,-0.026031494,-0.029220581,0.019348145,0.0010662079,-0.064453125,0.012832642,-0.00390625,0.051116943,-0.059753418,0.049682617,-0.013977051,0.011833191,0.06854248,-0.0071640015,-0.044006348,0.018218994,0.024734497,0.026367188,0.04547119,0.0003232956,-0.017791748,-0.006706238,0.06695557,-0.018035889,0.0023155212,0.000300169,0.012962341,0.037902832,-0.007621765,-0.05731201,-0.036010742,-0.018356323,-0.03213501,0.013717651,-0.030654907,0.030334473,-0.015396118,0.007118225,-0.025314331,-0.010871887,-0.03387451,0.022613525,0.00048542023,0.0022220612,-0.01524353,-0.025283813,0.0063934326,0.028549194,-0.017227173,0.014465332,0.046051025,0.03515625,-0.0069618225,-0.044189453,-0.027572632,-0.015670776,0.005634308,0.028549194,0.033233643,0.015853882,0.052978516,-0.028961182,0.014533997,0.029525757,0.013221741,0.033721924,0.0030612946,0.012489319,-0.06695557,-0.060333252,-0.026504517,-0.038146973,0.031555176,0.006175995,0.0010490417,0.049468994,0.014007568,-0.020858765,-0.038970947,0.034179688,-0.039886475,0.0006184578,0.054840088,-0.012420654,-0.035491943,-0.00045704842,0.0024909973,0.0054473877,0.03488159,0.015930176,0.016738892,0.06665039,0.037719727,0.011245728,0.030792236,0.023757935,0.021072388,0.0051002502,-0.02848816,-0.020736694,-0.02003479,0.0287323,-0.020767212,-0.020858765,-0.08117676,0.049224854,0.03869629,0.06726074,0.021026611,0.013397217,0.036132812,-0.01826477,0.016220093,-0.027923584,-0.01247406,-0.029418945,-0.05505371,0.024307251,-0.00440979,0.0027675629,-0.019699097,0.029144287,0.0048675537,0.013839722,-0.032348633,0.05456543,-0.004989624,-0.013259888,0.03616333,-0.005886078,0.04232788,0.04296875,-0.038482666,0.03250122,0.01625061,-0.029327393,0.005001068,0.031707764,-0.02027893,-0.015151978,-0.06463623,-0.037597656,-0.009605408,-0.00579834,-0.05130005,-0.001616478,0.011550903,0.01737976,0.025238037,-0.016021729,-0.020401001,0.018615723,-0.023742676,-0.052368164,-0.0021705627,-0.03955078,0.008728027,0.047058105,-0.024246216,0.0038700104,0.0071640015,-0.012527466,0.0076560974,0.018463135,0.011779785,-0.003921509,-0.05114746,0.014770508,0.0006747246,0.015625,0.014129639,0.021331787,0.027877808,0.015182495,0.050109863,0.022247314,-0.023010254,-0.054473877,0.01474762,-0.055419922,-0.0035171509,0.0051841736,-0.00856781,0.0063056946,-0.0046691895,-0.0234375,-0.028823853,0.0016489029,-0.026489258,0.010398865,0.045318604,-0.026916504,-0.02960205,-0.057800293,-0.020217896,-0.00037002563,0.070739746,0.04647827,-0.0013847351,-0.062286377,-0.010032654,0.0127334595,0.0028591156,0.021499634,-0.015853882,-0.0056915283,-0.010856628,-0.03540039,-0.015312195,-0.013755798,0.025878906,0.0012321472,-0.018753052,0.019638062,0.0063972473,0.013031006,-0.00037169456,0.019836426,0.031829834,-0.028259277,0.0070762634,-0.029067993,0.029541016,0.007347107,0.008277893,-0.046081543,0.04812622,0.012466431,0.03338623,-0.03881836,-0.00157547,-0.0036907196,0.0064468384,0.016784668,-0.0036964417,-0.012374878,-0.012413025,-0.053100586,-0.0592041,0.045135498,-0.014152527,0.03189087,0.0019111633,0.018447876,0.02508545,-0.0037879944,-0.011932373,0.021469116,-0.029922485,-0.0034160614,-0.029785156,-0.03237915,-0.016281128,0.0013599396,-0.019943237,0.023391724,-0.021347046,0.015625,0.0028305054,-0.028015137,0.026473999,-0.006362915,0.003528595,0.02758789,0.0036258698,0.018127441,0.039733887,0.010604858,-0.029876709,0.02508545,-0.0035762787,0.015586853,-0.0064582825,0.033966064,0.036895752,-0.011810303,-0.004951477,-0.0032081604,-0.016311646,-0.019592285,-0.00096321106,0.008033752,0.02708435,0.006439209,-0.04598999,0.024261475,0.014183044,-0.029541016,-0.022949219,0.01096344,0.012161255,-0.03527832,0.016906738,0.012321472,0.06640625,-0.018096924,-0.0029258728,0.0038490295,0.019378662,0.020141602,0.030380249,-0.01675415,0.020950317,-0.007980347,0.018661499,-0.0039520264,-0.00881958,0.0154800415,-0.0017709732,0.023071289,0.025894165,0.010612488,-0.02583313,-0.018997192,0.0016117096,-0.014595032,-0.01889038,0.020584106,0.02468872,0.020019531,-0.02545166,0.017807007,0.02027893,-0.026535034,-0.019088745,-0.024002075,0.04473877,-0.018722534,-0.007751465,0.009185791,0.012413025,0.029876709,-0.054382324,-0.0029659271,0.0051841736,0.008468628,-0.022033691,-0.042297363,-0.03781128,0.0024528503,0.031707764,0.0050964355,0.022491455,0.03262329,0.0039024353,0.012016296,0.019256592,-0.0022659302,-0.006790161,-0.021224976,-0.0446167,-0.012496948,0.0035991669,-0.0031795502,-0.03842163,0.0013437271,-0.0124435425,-0.038391113,0.0010890961,-0.012916565,-0.006587982,-0.0050849915,0.018371582,0.035705566,0.0025615692,0.012916565,-0.016647339,-0.032440186,0.009490967,0.006839752,0.020004272,-0.050842285,0.006793976,-0.020446777,-0.011695862,-0.014625549,0.018371582,0.02355957,0.029953003,0.0018320084,0.021514893,-0.04522705,0.034423828,-0.031951904,0.011993408,0.008300781,-0.043426514,-0.011672974,-0.022399902,-0.019195557,0.03652954,-0.022262573,0.0019702911,-0.039031982,-0.033966064,-0.020355225,-0.05038452,0.015838623,0.04034424,0.03793335,-0.022521973,-0.00041794777,-0.008216858,0.007068634,-0.017059326,0.00066947937,-0.009353638,0.024261475,0.020523071,0.010177612,-0.03253174,-0.026611328,-0.01335144,0.0018873215,-0.048065186,-0.04714966,-0.023025513,0.0073127747,-0.016296387,0.0060653687,-0.028762817,-0.030166626,0.009597778,-0.03652954,0.012268066,0.009010315,0.023529053,0.014503479,-0.014839172,0.0036830902,0.022445679,-0.022949219,0.037597656,0.008720398,-0.005329132,-0.03970337,0.006942749,0.042175293,0.026260376,-0.0047073364,-0.009941101,-0.0013666153,-0.019439697,-0.05618286,-0.0104904175,-0.0062828064,-0.009490967,-0.010299683,0.00052785873,-0.054748535,-0.0077590942,-0.024002075,0.005622864,0.03250122,0.018966675,0.01638794,-0.004852295,0.0064697266,-0.014381409,0.0046844482,-0.03564453,0.01927185,0.01171875,-0.0025596619,0.018844604,0.05508423,0.0082092285,-0.011360168,0.003921509,-0.00030350685,0.016616821,-0.0231781,0.007820129,-0.017196655,0.002281189,0.0003259182,-0.011192322,-0.04434204,-0.00014734268,0.089416504,-0.007850647,-0.0025405884,-0.013572693,-0.015556335,0.017913818,0.036468506,-0.037994385,-0.0184021,-0.039611816,0.020431519,-0.013153076,0.026977539,0.010978699,0.022415161,-0.017684937,-0.06329346,-0.019500732,-0.0026664734,-0.010627747,-0.05722046,-0.024520874,-0.06097412,-0.0040779114,-0.007843018,-0.025482178,0.0056114197,0.017486572,-0.012062073,-0.082092285,0.0032787323,0.05557251,0.005466461,0.019927979,-0.01259613,0.02116394,0.021011353,-0.03479004,-0.00844574,0.025985718,-0.032104492,-0.018508911,-0.025375366,0.027542114,-0.012664795,-0.01676941,0.025268555,0.011619568,0.012634277,-0.012329102,0.0029888153,-0.013587952,0.017944336,-0.014595032,0.028137207,-0.012908936,-0.012367249,0.029220581,-0.050201416,0.015930176,0.01524353,-0.004924774,-0.008010864,0.034423828,0.041259766,-0.03704834,-0.01626587,0.030166626,0.016555786,0.036010742,-0.027130127,0.045410156,0.0067863464,-0.013679504,0.017211914,-0.017349243,-0.035339355,-0.0418396,-0.031921387,0.011138916,0.008506775,0.017791748,-0.005355835,-0.010040283,0.020507812,0.0011320114,0.012672424,-0.02166748,-0.026367188,-0.017852783,0.00053215027,-0.0019044876,-0.0049095154,-0.0025844574,0.03314209,0.03277588,0.039489746,0.000467062,-0.010658264,0.010765076,0.0143585205,-0.016052246,0.00504303,0.020614624,0.003288269,0.018508911,0.014595032,-0.0023918152,-0.048980713,-0.015129089,-0.03286743,-0.0077705383,0.0065231323,-0.0030994415,-0.0137786865,-0.004337311,0.0024204254,-0.0010728836,-0.031143188,0.023330688,-0.027908325,-0.023666382,-0.0050354004,-0.013595581,0.007068634,0.011367798,0.0015001297,0.008781433,-0.005722046,0.04989624,0.005241394,0.00005698204,0.022247314,0.031082153,0.010665894,-0.03466797,-0.009017944,-0.0040283203,-0.009483337,-0.00025439262,-0.031982422,0.018539429,0.037322998,-0.017990112,-0.0016431808,-0.0033168793,0.034973145,-0.008377075,0.008323669,-0.0017385483,0.016220093,-0.016952515,0.036376953,-0.04397583,0.010719299,0.020446777,0.011169434,-0.0021972656,-0.014190674,-0.034301758,0.01826477,-0.0026416779,-0.01436615,0.051086426,0.0014982224,0.026687622,-0.028259277,-0.016662598,0.004245758,-0.025024414,-0.018798828,0.03591919,-0.004070282,0.0051498413,0.020202637,-0.024536133,0.039764404,-0.040924072,0.01953125,0.00036168098,-0.0012760162,-0.0070152283,-0.015686035,-0.023345947,-0.0015954971,-0.0055236816,-0.0032234192,-0.008148193,0.0541687,0.018661499,0.035583496,0.045318604,0.007068634,0.0045776367,-0.047088623,-0.035491943,0.000089883804,-0.017684937,0.019485474,-0.016479492,0.060180664,0.03793335,0.0017642975,0.036468506,0.033203125,0.0335083,0.008514404,0.017532349,-0.002796173,0.015640259,-0.0035324097,0.029769897,-0.0013999939,0.042755127,-0.03186035,0.020889282,0.013839722,0.024810791,-0.022262573,0.04055786,0.072631836,0.02279663,-0.009140015,0.037353516,0.001162529,-0.014709473,-0.009475708,-0.018859863,0.059753418,0.005935669,0.05368042,0.04837036,0.013572693,0.0023994446,0.028167725,-0.033599854,-0.033477783,0.068359375,0.02519226,-0.025390625,-0.012336731,-0.014907837,0.008758545,-0.06060791,-0.026779175,0.014945984,-0.0014648438,0.0110321045,-0.011764526,-0.005657196,-0.016525269,0.016113281,0.019088745,0.011230469,-0.010887146,0.032043457,0.028060913,0.004261017,0.027404785,-0.0047416687,0.036010742,-0.0357666,-0.008079529,0.00982666,0.016464233,-0.009796143,-0.0066070557,0.015449524,0.0026950836,0.043823242,0.03881836,-0.019607544,0.004081726,0.023666382,0.016647339,0.0090408325,0.052734375,0.03048706,0.0066223145,0.03567505,0.035827637,0.018508911,-0.039794922,0.021560669,-0.00737381,0.0038223267,-0.0026187897,-0.017196655,-0.0006489754,-0.01826477,0.018325806,-0.00069999695,-0.005710602,0.01852417,0.024215698,0.008720398,-0.0021915436,-0.007270813,0.009628296,-0.018173218,-0.0054893494,0.0053596497,-0.009017944,0.031066895,0.0026435852,0.034088135,-0.014556885,0.029876709,-0.00919342,-0.018692017,-0.000067949295,0.02696228,-0.038330078,-0.009353638,-0.0021076202,0.0018672943,-0.04650879,0.011833191,0.035095215,-0.013893127,0.020980835,0.02243042,0.003967285,-0.00050735474,0.022384644,0.015068054,-0.011306763,-0.010055542,-0.018493652,0.025039673,0.039245605,0.0033435822,0.012413025,-0.01889038,0.0017776489,0.003774643,-0.002998352,-0.002532959,-0.010887146,-0.0138168335,-0.037109375,0.010902405,0.034973145,0.0118255615,0.04309082,-0.006038666,-0.011108398,0.009033203,0.032104492,0.0075683594,0.0021400452,-0.011810303,0.026275635,-0.019592285,0.046417236,0.027282715,0.00004929304,0.016555786,-0.011894226,-0.020187378,0.010322571,-0.012077332,0.025817871,-0.009254456,0.006839752,-0.008850098,0.023361206,-0.015304565,-0.045043945,0.016693115,-0.0059280396,-0.009300232,-0.021835327,0.013748169,0.006164551,0.017730713,0.038513184,0.007217407,-0.037841797,0.06817627,-0.015716553,0.051330566,-0.019165039,-0.0009088516,0.052124023,0.03302002,0.03579712,0.025802612,0.022262573,-0.033966064,0.020629883,0.0390625,0.022033691,0.008415222,0.011428833,-0.028579712,0.04095459,0.0061073303,0.032836914,-0.014854431,-0.0008277893,0.016860962,-0.0041542053,-0.009483337,0.0022220612,-0.004306793,0.008049011,0.04345703,-0.032928467,-0.016494751,-0.012992859,-0.010421753,0.030975342,-0.003320694,-0.0013418198,0.0008583069,-0.022735596,0.011459351,-0.027191162,-0.020370483,0.008628845,0.027786255,-0.038360596,-0.0054397583,0.0011110306,0.027069092,-0.030059814,0.031555176,0.014587402,-0.0060768127,0.011932373,0.043792725,-0.0035686493,0.03302002,-0.009941101,0.019760132,0.035888672,-0.002380371,-0.021636963,0.010620117,0.010108948,-0.020965576,0.0062446594,0.030929565,-0.007205963,0.0029087067,0.0027427673,-0.0073051453,0.004558563,0.011978149,-0.003932953,0.0042495728,-0.005393982,-0.012245178,-0.0014410019,0.00705719,0.0058403015,0.0067825317,-0.015205383,-0.013168335,0.005466461,0.03527832,0.017166138,-0.028167725,0.008171082,0.006504059,0.017364502,-0.018157959,-0.016204834,-0.008148193,-0.028549194,0.016403198,0.018615723,0.0021781921,0.007030487,-0.024108887,-0.0009469986,0.021148682,0.01550293,0.010467529,-0.0048713684,-0.0047950745,0.012138367,-0.015167236,0.0040283203,-0.001958847,-0.011833191,0.0118255615,0.014137268,-0.00094795227,-0.028518677,0.01574707,-0.00020599365,0.01663208,0.00057411194,-0.0234375,0.014831543,-0.0039520264,-0.006526947,0.0024547577,0.013549805,-0.013244629,-0.014831543,-0.015594482,0.03387451,0.060455322,-0.008049011,-0.021377563,0.017410278,0.022338867,0.022384644,0.036315918,0.007980347,0.043914795,0.019943237,-0.025665283,-0.027923584,0.019760132,-0.014541626,-0.033233643,0.008407593,-0.0116119385,-0.015533447,0.013206482,0.007320404,-0.0034980774,-0.022827148,-0.020736694,-0.009925842,-0.015914917,0.023483276,-0.010917664,0.005180359,-0.021697998,-0.007797241,0.018554688,-0.016464233,-0.042877197,-0.020462036,-0.0019683838,-0.012794495,-0.04827881,0.013366699,-0.022994995,0.01309967,-0.012969971,0.011131287,-0.005443573,0.037384033,-0.016021729,-0.010955811,0.018234253,0.02784729,0.020507812,0.0061454773,0.026519775,-0.027297974,-0.035736084,-0.02029419,0.0005364418,-0.00843811,0.024658203,0.00067806244,0.04296875,0.010665894,-0.009666443,0.0004169941,-0.009437561,-0.006298065,-0.00059604645,-0.021865845,-0.017929077,0.01966858,0.020690918,-0.007083893,-0.013038635,0.043121338,-0.02545166,-0.021270752,0.023605347,0.036376953,0.010536194,0.023040771,-0.010246277,-0.018066406,-0.015136719,0.000954628,-0.016036987,0.00016701221,0.0069885254,0.0020503998,-0.01474762,-0.00053977966,0.015289307,-0.0049362183,0.00044226646,0.020965576,-0.008110046,-0.008842468,0.022903442,0.014572144,0.0005941391,-0.0155181885,-0.0098724365,0.011657715,0.053009033,0.011955261,0.0073547363,-0.0030727386,0.014343262,-0.020736694,0.0072784424,0.019104004,-0.020858765,-0.031219482,-0.020828247,-0.03265381,0.026794434,-0.0037345886,0.015098572,-0.0056877136,0.018203735,-0.018554688,-0.031341553,-0.026428223,0.025939941,0.009429932,-0.006980896,-0.003993988,-0.00022912025,0.008628845,-0.030136108,-0.0009813309,-0.039367676,-0.035949707,-0.015640259,-0.023406982,0.021560669,0.017333984,-0.007881165,0.000102221966,-0.003862381,-0.0035114288,0.012420654,0.029464722,-0.009666443,-0.008995056,0.012008667,0.009651184,-0.02784729,0.018005371,-0.0058517456,-0.00819397,0.015556335,-0.00919342,0.01763916,-0.020812988,0.017654419,-0.0012788773,-0.0062828064,0.0287323,0.009490967,0.009666443,-0.03475952,0.018005371,-0.00077819824,-0.0022392273,0.027252197,-0.03253174,-0.02381897,0.0022335052,-0.017578125,-0.039154053,0.007987976,0.024017334,0.0390625,-0.006038666,0.03765869,-0.017684937,-0.0060577393,0.009529114,0.014762878,-0.020950317,-0.0050354004,0.038635254,-0.0015449524,-0.010299683,0.011619568,-0.015151978,-0.028167725,-0.0104599,0.01802063,-0.010414124,-0.014015198,0.034088135,0.014480591,0.040924072,0.0072669983,0.021606445,0.01701355,0.0041503906,0.02319336,0.010688782,0.044006348,0.0069770813,-0.036376953,0.013153076,0.0007042885,-0.019226074,-0.008354187,0.00033974648,0.002840042,-0.03527832,0.015792847,-0.0071105957,0.02494812,-0.020965576,0.014030457,-0.023086548,-0.0042304993,-0.029663086,-0.0049476624,-0.031433105,0.017791748,0.035369873,0.01171875,0.011795044,0.014945984,-0.024642944,0.026916504,0.05178833,-0.012207031,-0.02935791,-0.01739502,0.0040397644,-0.0013847351,0.0010023117,0.014503479,-0.025909424,-0.010520935,0.0050697327,-0.027923584,0.0067329407,0.00617218,0.012557983,0.0020561218,-0.013031006,-0.010643005,0.02508545,-0.008338928,0.0067634583,0.0071792603,0.009567261,0.025772095,0.025482178,-0.008621216,0.02357483,0.022735596,-0.049438477,0.048980713,-0.015312195,0.022613525,-0.026504517,0.012756348,-0.030517578,-0.0126953125,-0.009063721,0.0065193176],"createdAt":"2026-04-18T20:29:35.277Z","updatedAt":"2026-04-22T05:31:54.594Z","lastSeenAt":"2026-04-22T05:31:54.594Z","tsv":"'/api':173 '/api/v1/benefits/80':55,202 '/call':13,28 '/docs':171 '/pricing':172 '/readme':175 '0.02':12,27,90,163 '000':80 '0x8335':68 '20':79 '2913':69 '402':214 '6':85 'accept':63 'access':7,22,61,228 'across':121 'actual':204 'advertis':75 'ai':131 'analysi':135 'analyt':125 'api':6,21,40,60,94,227 'attach':103 'base':9,24,50,71,81 'base network api' 'beyond':230 'broader':116 'caller':101 'categori':123 'challeng':74,215 'classif':138 'collect':34 'confirm':209 'connect':181 'content':187 'contract':67 'convers':155 'data':124,128,223 'decim':86 'descript':198 'document':166,218 'embed':139 'endpoint':41,54,120,158,203,207 'equal':89 'estim':149 'exampl':195 'exchang':144 'export':129 'extrem':168 'feed':143 'financ':140 'four':122 'function':225 'gas':148 'gate':42 'generat':156 'generic':232 'geocod':153 'header':108 'host':32 'infrastructur':151 'insight':130 'json-response' 'key':95 'label':233 'learn':133 'limit':98 'list':57 'live':210 'low payment fee' 'lowpaymentfee.com':31,117 'machin':132 'maxamountrequir':77 'metric':126 'micropayment api' 'network':51 'no-api-key' 'no-rate-limit' 'offer':119 'openapi':191 'page':176 'pay':2,17,37 'pay per call api' 'pay-per-request':1,16,36 'payment':46,64,107,113 'per':3,18,38,91,164 'platform':118 'premium':5,20,59,226 'premium api' 'price':142,161 'prompt':183 'proof':114 'proper':213 'protocol':47 'provid':229 'quot':147 'rate':97,145 'render':178 'report':127 'request':4,19,39,92,165 'request/response':194 'requir':100 'return':205,211 'schema':192 'sentiment':134 'simpli':102 'spars':169 'specif':53 'summar':137 'text':136 'token':146 'unclear':221 'uniform':160 'unit':82 'usdc':15,30,66,88 'usdc api access' 'usdc-base' 'util':152 'valid':111,154 'via':10,25 'wallet':182 'web3':141 'without':217 'x':106 'x-payment':105 'x402':11,26,45,73,112 'x402 api' 'x402-payment'","prices":[{"id":"13c589ef-72b3-4344-8274-70da00334abe","listingId":"21a97e70-fce4-4df4-87fd-8d6590d146ca","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/benefits/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:35.277Z"}],"sources":[{"listingId":"21a97e70-fce4-4df4-87fd-8d6590d146ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/80","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:35.277Z","lastSeenAt":"2026-04-22T05:31:54.594Z"}],"details":{"listingId":"21a97e70-fce4-4df4-87fd-8d6590d146ca","quickStartSnippet":"# The endpoint requires an x402 payment header. First, obtain the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/benefits/80\n# Then construct and attach a valid X-PAYMENT header per the x402 spec\n# paying 20000 base units ($0.02) USDC on Base to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"maxAmountRequired is 20000 base units of USDC on Base, equaling $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/benefits/80"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/80"},{"claim":"Platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"/docs, /pricing, /api, /README pages render only 'Connect wallet' with no documentation content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API data without needing to register or manage API keys","Agent-driven workflows that need on-demand API calls settled in USDC on Base","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment-gated APIs","AI agents that can autonomously pay for API calls via crypto","Users who want instant access without subscriptions or commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet","Production workloads requiring well-documented, schema-validated endpoints"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.635Z"},"updatedAt":"2026-04-22T05:31:54.594Z"}}