{"id":"36e46af4-507d-4025-9c8a-a829270484e7","shortId":"T9E2t4","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transactions/107` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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 priced at $0.02 per request.\n\nThis particular endpoint (`/api/v1/transactions/107`) is labeled \"Premium API Access\" but its actual functionality is not documented beyond that label. The crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no additional content. Without further documentation or example responses, the exact data returned by this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["api-platform","finance"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["The exact functionality of /api/v1/transactions/107 is undocumented — 'Premium API Access' is the only description available.","All documentation pages (docs, api, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.","No OpenAPI spec, request schema, or response schema is available.","The endpoint's purpose within the 'transactions' path is unclear and may not match the broader platform categories listed on the homepage."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/107","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/transactions/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the actual functionality behind \"Premium API Access\" is undefined. Docs pages returned only wallet-connect prompts.","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":"2026-04-19T11:52:44.706Z","embedding":[-0.03036499,-0.044921875,0.038879395,0.015014648,0.0098724365,-0.024963379,-0.021942139,0.025863647,0.07080078,-0.06536865,0.026550293,-0.03845215,-0.04135132,-0.028518677,-0.015342712,0.0074043274,-0.0030994415,0.0076942444,-0.028366089,0.025100708,0.03491211,-0.015533447,-0.0284729,0.01499939,0.005542755,-0.016113281,-0.010116577,-0.010444641,-0.008514404,-0.043060303,0.032348633,-0.028396606,-0.00818634,0.0033836365,-0.0070533752,-0.01449585,-0.0010137558,0.029327393,0.02848816,0.00023543835,0.0071640015,-0.059783936,-0.0066566467,-0.016113281,-0.04977417,-0.0016040802,0.007369995,-0.03164673,0.004081726,0.004070282,-0.03729248,-0.009246826,-0.014549255,0.009986877,0.0056419373,0.001247406,0.002248764,-0.0099105835,0.017166138,0.01777649,-0.014427185,-0.062438965,-0.017364502,-0.0079574585,0.011764526,0.053466797,-0.008392334,0.033599854,0.0070533752,0.06335449,0.032440186,0.059906006,0.023406982,0.026412964,0.008613586,0.0010175705,-0.004425049,0.050567627,-0.022338867,-0.022872925,-0.008651733,-0.017105103,-0.0541687,0.0033893585,-0.016723633,-0.036956787,-0.022369385,0.023269653,-0.019256592,0.019515991,-0.06774902,-0.00046634674,0.0011510849,-0.0024147034,-0.0066604614,-0.012031555,-0.014205933,0.021514893,-0.009941101,0.00680542,0.0013685226,-0.047454834,0.026397705,0.018051147,0.03378296,0.0423584,0.015274048,0.02180481,0.002483368,0.0065231323,-0.014129639,0.02243042,-0.005607605,0.0014390945,0.025558472,0.0066947937,-0.009895325,0.010810852,-0.02859497,0.034362793,-0.060272217,0.051727295,0.010292053,-0.004055023,0.0031986237,-0.051361084,-0.005508423,0.022094727,-0.023651123,-0.0062713623,0.01777649,0.019973755,0.029281616,-0.0209198,-0.02722168,0.021820068,-0.015457153,-0.008712769,-0.06036377,-0.035705566,0.042388916,-0.033966064,0.017074585,0.047424316,-0.101501465,-0.011451721,-0.047668457,0.0103302,-0.029006958,-0.008117676,-0.005344391,0.023895264,-0.017684937,-0.015014648,-0.020736694,-0.032104492,0.009460449,0.043304443,-0.017211914,0.050323486,-0.022140503,0.008857727,0.02319336,0.016098022,0.014778137,0.02633667,-0.0011253357,-0.07446289,-0.082336426,-0.013725281,-0.0046195984,-0.020584106,-0.033935547,0.019348145,-0.005630493,-0.0869751,-0.022384644,-0.020706177,-0.0009431839,-0.037139893,-0.00756073,-0.03753662,0.021942139,-0.0105896,-0.060516357,-0.027191162,-0.035949707,0.05117798,0.02947998,0.02760315,0.03225708,-0.011703491,0.054229736,0.020324707,-0.019577026,-0.010864258,0.01348114,-0.01676941,0.010246277,-0.008796692,0.0074691772,-0.029586792,0.02357483,0.08465576,0.002023697,-0.02305603,-0.00868988,-0.05697632,-0.031677246,-0.03363037,0.015701294,0.01083374,-0.0054512024,0.037109375,-0.03137207,-0.033721924,0.008766174,0.021118164,0.020980835,0.05709839,0.0024719238,-0.0127334595,0.042297363,0.02128601,-0.054534912,0.035369873,0.039245605,0.00944519,-0.035858154,-0.031921387,0.026046753,0.04550171,-0.026992798,0.0087509155,-0.009017944,0.037872314,-0.019348145,0.0035972595,0.018661499,-0.024032593,-0.030212402,-0.027709961,-0.014923096,0.02418518,0.008583069,-0.028152466,-0.03543091,-0.08477783,0.05178833,0.044952393,0.031036377,-0.008407593,-0.008392334,-0.016799927,-0.020843506,-0.067871094,0.059326172,0.0748291,0.0040512085,-0.0039100647,0.030395508,-0.00566864,-0.04058838,0.013465881,-0.026535034,-0.032470703,-0.01701355,0.0051994324,-0.0385437,-0.0047302246,0.014778137,0.034423828,0.054901123,-0.008071899,-0.05166626,-0.017105103,-0.0052986145,0.0027561188,-0.031036377,0.0021419525,-0.0036716461,0.012283325,0.020767212,0.0104599,0.013130188,0.00035190582,0.0037574768,0.000008583069,0.009986877,-0.019317627,-0.031677246,0.01260376,0.0020923615,-0.055480957,-0.0022640228,-0.00077056885,0.06591797,-0.044799805,0.044830322,-0.012901306,0.0073242188,0.05621338,0.00019574165,-0.049072266,0.0039138794,0.022338867,0.02268982,0.03866577,0.018707275,-0.033599854,-0.013442993,0.07757568,-0.009460449,-0.0020198822,0.006122589,0.010322571,0.039398193,-0.0062065125,-0.043640137,-0.036071777,0.0015525818,-0.035583496,0.020767212,-0.03237915,0.03729248,-0.017028809,0.0063591003,-0.026733398,0.0018358231,-0.028961182,0.007598877,-0.0009636879,0.011199951,-0.019073486,-0.017059326,0.012969971,0.0018377304,-0.015899658,0.0005393028,0.03866577,0.013633728,-0.0026474,-0.025650024,-0.037628174,-0.009185791,-0.0023212433,0.023391724,0.01625061,0.015144348,0.044128418,-0.035858154,0.005619049,0.022964478,0.018951416,0.03036499,-0.011558533,0.010528564,-0.06628418,-0.046691895,-0.022735596,-0.04031372,0.036071777,0.007858276,-0.0055770874,0.05871582,0.020477295,-0.027008057,-0.035491943,0.021453857,-0.046722412,-0.0007176399,0.0385437,-0.010940552,-0.022766113,0.014259338,0.0016565323,0.0033664703,0.035186768,0.019607544,0.035614014,0.072143555,0.050201416,0.006969452,0.03414917,-0.0014410019,0.024551392,0.008872986,-0.027145386,-0.035736084,-0.03161621,0.0390625,-0.013885498,-0.0077285767,-0.0690918,0.039398193,0.04736328,0.095947266,0.01725769,0.0037574768,0.025024414,-0.016235352,0.019561768,-0.019256592,-0.021652222,-0.026809692,-0.04434204,0.012283325,-0.009521484,-0.0034713745,-0.019958496,0.029327393,-0.0002667904,0.021636963,-0.01927185,0.050933838,-0.020736694,-0.020935059,0.013626099,0.009483337,0.047027588,0.06652832,-0.044677734,0.03277588,0.031341553,-0.027893066,0.0124435425,0.040893555,-0.01159668,-0.009887695,-0.04208374,-0.023147583,-0.014167786,-0.008720398,-0.05444336,0.013221741,0.008293152,0.0262146,0.023208618,-0.007537842,-0.013214111,-0.0035552979,-0.012924194,-0.046813965,-0.006298065,-0.02558899,-0.00013780594,0.04800415,-0.025909424,-0.0073051453,-0.0042533875,-0.0073394775,0.0032081604,0.0040626526,0.01725769,-0.0044670105,-0.044830322,0.020996094,0.0019702911,0.010292053,0.015350342,0.026245117,0.021530151,0.03439331,0.047698975,0.016708374,-0.0056495667,-0.06329346,0.01663208,-0.04837036,-0.0037345886,0.023803711,-0.018341064,0.001209259,-0.022872925,-0.032196045,-0.020446777,0.011276245,-0.030654907,-0.0006322861,0.019714355,-0.015991211,-0.026672363,-0.05130005,-0.02003479,0.00027656555,0.062805176,0.028549194,0.020324707,-0.06713867,-0.005088806,0.024505615,0.011604309,0.029281616,-0.014404297,0.00038051605,-0.009475708,-0.032928467,-0.006504059,-0.018493652,0.030883789,-0.0018005371,0.000025629997,0.010879517,0.007434845,0.02305603,0.014076233,0.010429382,0.024002075,-0.008972168,-0.009147644,-0.00067806244,0.035736084,0.016723633,-0.009170532,-0.044769287,0.035614014,0.016479492,0.02911377,-0.04171753,-0.008384705,-0.011169434,0.0055732727,0.013267517,-0.0070343018,-0.00843811,-0.019332886,-0.044311523,-0.059387207,0.05114746,-0.022827148,0.024124146,0.03050232,0.0057678223,0.022781372,-0.0072784424,0.0023880005,0.019561768,-0.027252197,-0.009681702,-0.017990112,-0.027404785,-0.022003174,-0.021072388,-0.028656006,0.025634766,-0.022720337,0.013198853,0.0031433105,-0.016952515,0.023986816,-0.006580353,-0.005207062,0.017059326,0.0021343231,0.020629883,0.033050537,0.010017395,-0.050750732,0.012016296,-0.004058838,0.018218994,-0.004547119,0.043395996,0.026412964,-0.018875122,-0.002210617,-0.00944519,-0.02470398,-0.017333984,0.0011873245,0.0077781677,0.011314392,0.005367279,-0.034484863,0.010307312,-0.0033245087,-0.037963867,-0.031341553,0.015731812,0.01247406,-0.034851074,0.027404785,0.040222168,0.051879883,-0.015838623,0.0020542145,0.002210617,0.025848389,0.03765869,0.014595032,-0.01486969,0.02027893,-0.012687683,0.0236969,-0.0035495758,-0.007850647,0.015014648,0.004180908,0.02494812,0.026626587,0.0065956116,-0.02418518,-0.036071777,-0.0068130493,-0.009109497,-0.028625488,0.022735596,0.025482178,0.037139893,-0.022354126,0.02041626,0.017791748,-0.020645142,-0.011528015,-0.01600647,0.037719727,-0.017288208,-0.009246826,0.016784668,0.0146865845,0.029922485,-0.058807373,-0.009231567,0.0021018982,0.0067481995,-0.019256592,-0.04611206,-0.033569336,0.010246277,0.0413208,0.013664246,0.0141067505,0.034240723,0.00831604,0.010658264,0.03265381,-0.008972168,-0.0021362305,-0.0062675476,-0.04800415,-0.020568848,-0.016189575,0.001203537,-0.026519775,0.017578125,-0.00025367737,-0.020324707,-0.0012540817,-0.021026611,-0.0013914108,-0.016540527,0.008377075,0.039001465,0.0072021484,0.011329651,-0.020812988,-0.037597656,0.009407043,0.0076179504,0.013664246,-0.03970337,0.022613525,-0.010948181,-0.01499176,0.0023822784,0.020248413,0.022155762,0.026031494,0.009849548,0.039245605,-0.04449463,0.03805542,-0.026611328,0.0116119385,-0.0037593842,-0.0418396,-0.011566162,-0.019760132,-0.015930176,0.041625977,-0.023635864,-0.0067329407,-0.031677246,-0.032928467,-0.006061554,-0.0569458,0.0053710938,0.03982544,0.03665161,-0.024978638,0.005405426,0.0020980835,0.010070801,-0.009925842,0.015029907,-0.02180481,0.027526855,0.021408081,0.004032135,-0.03164673,-0.024383545,-0.02558899,-0.012535095,-0.043792725,-0.053100586,-0.019042969,0.0027198792,-0.005706787,-0.0073394775,-0.016021729,-0.03152466,-0.0027942657,-0.04244995,0.009300232,0.0061569214,0.018173218,0.0011091232,-0.02658081,0.003578186,0.021194458,-0.013633728,0.036956787,0.01713562,-0.008560181,-0.050872803,0.01727295,0.009284973,0.021759033,-0.004760742,-0.020492554,-0.0056114197,-0.020767212,-0.058746338,-0.010063171,-0.0062713623,-0.020965576,-0.008460999,0.006542206,-0.060302734,0.003320694,-0.018417358,0.008087158,0.022842407,0.0067710876,0.018463135,0.0040626526,0.021499634,-0.014518738,-0.0030345917,-0.0368042,0.01600647,0.010398865,0.007083893,0.023834229,0.054534912,0.0008773804,-0.026855469,0.005760193,0.007434845,0.020523071,-0.022705078,0.007671356,-0.020141602,0.0047073364,-0.008926392,-0.014350891,-0.04397583,-0.007671356,0.07836914,-0.006412506,-0.025253296,-0.018218994,-0.014183044,0.020385742,0.034698486,-0.03277588,-0.010917664,-0.021011353,0.02708435,-0.022247314,0.0115356445,0.0027637482,0.023712158,-0.012466431,-0.052001953,-0.026824951,-0.004650116,-0.019592285,-0.053649902,-0.026733398,-0.061187744,0.00006788969,-0.0057258606,-0.02848816,0.0022583008,0.008583069,-0.013504028,-0.084228516,-0.004207611,0.055908203,0.008361816,0.032348633,-0.009780884,0.024841309,0.035461426,-0.037872314,-0.00919342,0.024093628,-0.03491211,-0.015808105,-0.024139404,0.01727295,-0.0140686035,-0.016815186,0.008781433,0.008628845,0.015472412,-0.015777588,0.0008049011,-0.01689148,0.01651001,-0.016220093,0.02355957,-0.01927185,-0.014167786,0.03250122,-0.0435791,0.02470398,0.00088882446,-0.014022827,-0.0020599365,0.028411865,0.041900635,-0.04257202,-0.019714355,0.023651123,0.008880615,0.030593872,-0.023986816,0.04336548,0.00945282,-0.017456055,0.02041626,-0.012382507,-0.014328003,-0.022109985,-0.03555298,0.01965332,-0.009056091,0.024047852,-0.029891968,-0.0074539185,0.012390137,0.008880615,0.0062713623,-0.006286621,-0.027069092,-0.02394104,-0.0037078857,0.0031204224,0.001906395,0.000093758106,0.022384644,0.024002075,0.041748047,0.015792847,-0.025650024,0.005443573,0.023803711,-0.014854431,0.00844574,0.030548096,-0.0065460205,0.017700195,0.024414062,0.019943237,-0.04800415,-0.017944336,-0.010192871,-0.016799927,-0.008613586,-0.009468079,-0.019241333,-0.013145447,0.009300232,-0.0068626404,-0.033569336,0.0057678223,-0.022079468,-0.03414917,-0.0030441284,-0.016036987,0.029632568,0.0066833496,0.013519287,0.010719299,-0.0071754456,0.04309082,0.0028533936,-0.022598267,0.027069092,0.031829834,0.012359619,-0.02999878,-0.0066604614,-0.008415222,-0.015792847,0.0031013489,-0.036254883,0.010368347,0.04385376,-0.020095825,-0.0018835068,0.0027618408,0.010505676,-0.0074691772,0.012664795,-0.009361267,0.019378662,-0.0024032593,0.038360596,-0.04321289,0.023483276,0.010856628,0.012763977,-0.018203735,-0.011695862,-0.032073975,0.02444458,0.0149383545,-0.01902771,0.050048828,0.010795593,0.035095215,-0.013053894,-0.019424438,0.0075531006,-0.046569824,-0.023040771,0.022323608,-0.010948181,-0.0023651123,0.0154418945,-0.03189087,0.04660034,-0.02722168,0.014945984,0.0013465881,0.0046844482,-0.005744934,-0.021957397,-0.0015048981,-0.010215759,-0.016525269,0.013961792,-0.0026378632,0.047698975,0.018356323,0.031951904,0.05407715,0.019378662,0.0011854172,-0.042419434,-0.029281616,0.012664795,-0.017303467,0.028747559,-0.022384644,0.0579834,0.038726807,0.0027694702,0.04119873,0.027114868,0.035339355,0.008415222,0.0009627342,-0.02218628,0.015312195,0.0009441376,0.028671265,-0.0014410019,0.03604126,-0.029586792,0.024856567,0.014198303,0.021148682,-0.037628174,0.037200928,0.06072998,0.020889282,-0.0044784546,0.03829956,-0.0012044907,-0.012458801,-0.0032634735,-0.018478394,0.053863525,0.005882263,0.044525146,0.05532837,0.017166138,0.004562378,0.03274536,-0.024887085,-0.028152466,0.06222534,0.026184082,-0.026290894,-0.012878418,-0.0036468506,0.011672974,-0.042877197,-0.026290894,0.01675415,-0.010253906,0.011695862,-0.0048675537,-0.005672455,-0.007801056,0.007091522,0.024520874,0.013847351,-0.009925842,0.027893066,0.03466797,-0.0027599335,0.021621704,-0.008880615,0.024612427,-0.023803711,-0.015457153,0.025817871,0.028671265,-0.011299133,-0.005760193,0.025253296,-0.00012278557,0.033477783,0.04260254,-0.029922485,0.010108948,0.031829834,0.010116577,-0.0028038025,0.054748535,0.039733887,0.008308411,0.046081543,0.028076172,0.03262329,-0.04269409,0.023651123,-0.0066337585,-0.00092458725,-0.0146865845,-0.008293152,0.0034503937,-0.01689148,0.017562866,0.0013828278,-0.015220642,0.027252197,0.028884888,-0.0032730103,-0.005870819,-0.0099487305,0.0074501038,-0.023880005,-0.0029659271,0.01033783,-0.020980835,0.040649414,0.008911133,0.027069092,-0.026901245,0.024002075,0.0043792725,-0.016281128,0.0005226135,0.026672363,-0.03704834,0.005973816,-0.0057640076,0.003528595,-0.067871094,0.01058197,0.029586792,-0.016952515,0.022628784,0.015205383,-0.0074272156,-0.015289307,0.028289795,0.010787964,-0.004234314,-0.017074585,-0.024291992,0.028137207,0.043121338,0.0017528534,0.0010824203,-0.017974854,-0.005554199,0.0041656494,0.00024795532,-0.0066566467,-0.016494751,-0.010681152,-0.02532959,0.018585205,0.03970337,0.020767212,0.054229736,-0.018630981,-0.0069236755,0.005809784,0.044708252,0.0044822693,-0.0033073425,0.0016212463,0.0071372986,-0.015838623,0.05105591,0.03439331,0.008979797,0.03488159,0.00070905685,-0.023544312,0.013977051,-0.019958496,0.027526855,-0.010787964,0.0011825562,-0.003189087,0.02760315,-0.014389038,-0.037506104,0.004814148,-0.023651123,-0.016281128,-0.017044067,0.014976501,0.0050621033,0.024597168,0.03970337,0.023086548,-0.01889038,0.06347656,-0.007827759,0.044311523,-0.0012350082,-0.011497498,0.050323486,0.015510559,0.039245605,0.014923096,0.014404297,-0.034820557,0.021499634,0.030960083,0.027786255,0.011550903,0.006576538,-0.00919342,0.02885437,-0.006210327,0.027450562,-0.006565094,-0.0007367134,0.022521973,-0.007911682,0.0020046234,-0.0035552979,-0.002878189,0.008430481,0.047790527,-0.03387451,0.001950264,-0.028671265,-0.013832092,0.021133423,-0.025802612,0.0024375916,0.0009121895,-0.013999939,0.014038086,-0.01626587,-0.02645874,0.012611389,0.025054932,-0.04953003,-0.017089844,0.0062217712,0.020523071,-0.017700195,0.030181885,0.01574707,0.004211426,0.007785797,0.046569824,-0.006591797,0.030395508,-0.009239197,0.02859497,0.026748657,0.0069084167,-0.01965332,0.0024681091,0.008232117,-0.00932312,0.012527466,0.037109375,-0.01663208,0.0035419464,-0.011520386,0.0010490417,-0.0006828308,0.013389587,-0.0154953,0.010566711,-0.008842468,-0.014221191,0.0006699562,0.010063171,-0.00283432,0.001168251,0.012260437,-0.015029907,0.013389587,0.04220581,0.019622803,-0.023071289,-0.009780884,0.007972717,0.012573242,-0.014015198,-0.013015747,-0.0074501038,-0.038269043,0.010169983,0.010322571,0.012908936,0.016189575,-0.024337769,-0.0073242188,0.021575928,0.01247406,0.01713562,0.0037345886,0.0019397736,0.014274597,-0.0016374588,-0.0027809143,-0.004825592,-0.0033798218,0.014328003,0.019088745,-0.011428833,-0.025146484,0.026824951,-0.008857727,0.018478394,-0.00006389618,-0.017791748,0.014457703,-0.006175995,-0.0018835068,0.002199173,0.007865906,-0.010032654,-0.01008606,-0.010063171,0.040039062,0.05569458,-0.0154953,-0.0037403107,0.028259277,0.016098022,0.013221741,0.038604736,0.008224487,0.0390625,0.02822876,-0.019500732,-0.024795532,0.031799316,-0.015167236,-0.028625488,0.013145447,-0.017944336,-0.023376465,0.020980835,0.023956299,0.0039787292,-0.03414917,-0.00869751,-0.008216858,-0.01259613,0.01272583,-0.014976501,0.016723633,-0.02848816,-0.01424408,0.016464233,-0.025344849,-0.0440979,-0.020324707,-0.0035171509,-0.009941101,-0.050994873,0.0069885254,-0.029037476,0.011154175,-0.030517578,-0.0057907104,-0.007583618,0.011199951,-0.011047363,-0.01424408,0.0132751465,0.025222778,0.02267456,0.012138367,0.021240234,-0.02116394,-0.02305603,-0.024795532,0.008796692,-0.013671875,0.02041626,0.0030345917,0.030212402,0.024978638,-0.01235199,0.0006299019,-0.0040283203,-0.009414673,-0.018234253,-0.020019531,-0.021377563,0.026123047,0.016143799,-0.004283905,-0.014556885,0.046081543,-0.034942627,-0.020706177,0.036956787,0.042877197,0.004737854,0.032470703,-0.021469116,-0.007221222,-0.014076233,0.0020580292,-0.012367249,0.0045166016,0.006668091,0.0042495728,-0.007423401,0.0026073456,0.020111084,-0.014259338,-0.0007019043,0.025009155,0.0056991577,-0.0041160583,0.04055786,0.009475708,0.0053482056,-0.01651001,-0.006706238,0.02305603,0.049041748,0.0118255615,0.004348755,-0.013412476,-0.002149582,-0.01473999,0.013038635,0.016540527,-0.019485474,-0.045135498,-0.018585205,-0.027145386,0.026031494,0.0014629364,0.013557434,-0.0178833,0.016784668,-0.016845703,-0.019836426,-0.027038574,0.03527832,0.010658264,-0.013923645,-0.010848999,0.013961792,0.017349243,-0.04168701,-0.0041160583,-0.042755127,-0.029296875,-0.0057373047,-0.027923584,0.031021118,0.017181396,0.005935669,-0.010513306,-0.0048713684,-0.0038452148,0.008354187,0.02418518,-0.02407837,-0.007434845,0.037628174,0.018966675,-0.015823364,0.01574707,-0.010475159,0.008918762,0.009124756,-0.013572693,0.015686035,-0.026428223,0.030853271,-0.015235901,-0.008010864,0.02458191,-0.0027370453,0.012817383,-0.0385437,0.008171082,-0.001663208,-0.005176544,0.043823242,-0.023849487,-0.020843506,0.007434845,-0.02166748,-0.030334473,0.010635376,0.012962341,0.025924683,-0.0010051727,0.048858643,-0.01777649,-0.008094788,0.025405884,0.012313843,-0.020217896,-0.002380371,0.028549194,0.00058984756,0.004802704,-0.00009936094,-0.017349243,-0.03555298,-0.0101623535,0.017074585,-0.008804321,-0.020141602,0.028671265,0.025115967,0.04373169,-0.0026454926,0.024475098,0.008491516,0.0070114136,0.029891968,0.001791954,0.056610107,-0.0059127808,-0.024505615,0.0035686493,-0.0039405823,-0.028335571,0.008583069,-0.0022697449,0.009017944,-0.038909912,0.021087646,0.0034732819,0.016586304,-0.024978638,0.008026123,-0.02268982,-0.017074585,-0.03237915,-0.0072021484,-0.03036499,0.007297516,0.028625488,0.008346558,0.02760315,-0.0057144165,-0.025726318,0.01411438,0.046447754,-0.0079422,-0.026824951,-0.01725769,0.010925293,0.009529114,0.010734558,0.009681702,-0.017349243,-0.014625549,0.010871887,-0.01576233,0.0044021606,-0.008644104,0.013214111,0.0064430237,-0.0030021667,-0.008575439,0.025314331,-0.0032730103,-0.007583618,0.004760742,0.0035362244,0.0284729,0.028961182,-0.009941101,0.016067505,0.013946533,-0.04348755,0.06451416,0.0023479462,0.017044067,-0.01979065,0.005329132,-0.038635254,-0.028152466,-0.010375977,0.008155823],"createdAt":"2026-04-18T18:58:10.675Z","updatedAt":"2026-04-23T23:03:08.151Z","lastSeenAt":"2026-04-23T23:03:08.151Z","tsv":"'/api/v1/transactions/107':56,159 '/request':13,28 '0.02':12,27,78,153 '000':72 '20':71 '402':66 '402 payment api' 'accept':46 'access':62,92,164 'across':112 'actual':167 'addit':192 'advertis':83 'ai':122 'analysi':126 'analyt':116 'api':5,20,38,61,85,163,179 'attach':95 'base':8,23,51,73 'base network api' 'beyond':172 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67 'classif':129 'connect':187 'content':193 'convers':146 'crawl':176 'data':115,119,202 'doc':177 'document':171,196 'embed':130 'endpoint':55,111,149,158,206 'estim':140 'exact':201 'exampl':198 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':168 'gas':139 'generat':147 'geocod':144 'header':100 'http-post' 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'json-response' 'key':86 'label':161,174 'learn':124 'limit':89 'list':58 'low payment fee' 'lowpaymentfee.com':31 'machin':123 'metric':117 'micropayment api' 'network':9,24,52 'no-api-key' 'offer':110 'page':182 'particular':157 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,99,105 'per':3,18,36,79,154 'platform':6,21,39,82,109 'premium':60,162 'price':133,151,178 'prompt':189 'proof':106 'protocol':44 'quot':138 'rate':88,136 'readm':181 'remain':207 'report':118 'request':37,68,155 'respons':199 'return':64,184,203 'sentiment':125 'simpli':94 'specif':54 'summar':128 'text':127 'token':137 'unclear':208 'unit':74 'usdc':15,30,47,76 'usdc api' 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':188 'web3':132 'without':194 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 api' 'x402-payment'","prices":[{"id":"95ff07ea-a078-4102-85e1-4793c0f1ca12","listingId":"36e46af4-507d-4025-9c8a-a829270484e7","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/transactions/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:10.675Z"}],"sources":[{"listingId":"36e46af4-507d-4025-9c8a-a829270484e7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/107","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:10.675Z","lastSeenAt":"2026-04-23T23:03:08.151Z"}],"details":{"listingId":"36e46af4-507d-4025-9c8a-a829270484e7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/107 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/107"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/107"}],"useCases":["Programmatic access to premium API data with per-request USDC micropayments","Agent-driven workflows that need keyless, on-demand API access","Testing x402 payment protocol integrations on Base network"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that need keyless API access with crypto micropayments","Projects already operating on the Base L2 network with USDC"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume consumers who prefer subscription-based pricing over per-call payments","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.709Z"},"updatedAt":"2026-04-23T23:03:08.151Z"}}