{"id":"584fdd9f-1d69-4462-83f4-51e32fa74daf","shortId":"aGwjSA","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 specific resource `/api/v1/transactions/270` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). Payment is made via the X-PAYMENT header with a 300-second timeout window.\n\nDocumentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. The specific functionality of the `/api/v1/transactions/270` endpoint is unclear; it may relate to a transaction lookup or processing service, but no schema or example responses are documented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","crypto-paid API"],"warnings":["No documentation available beyond landing page — docs/pricing/README all show only 'Connect wallet'","The specific functionality of /api/v1/transactions/270 is unknown — no input/output schema provided","No OpenAPI spec or example responses available","Platform appears to be a generic x402 demo or placeholder with many listed endpoints but no substantive documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/270","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/270","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 402 challenge and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually returns, no request/response schema, and the docs pages are empty. The specific purpose of '/api/v1/transactions/270' is undocumented.","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":"2026-04-19T12:54:16.974Z","embedding":[-0.03149414,-0.03942871,0.03616333,0.026672363,0.0013952255,-0.024368286,-0.018829346,0.03945923,0.076660156,-0.07922363,0.023925781,-0.041534424,-0.03378296,-0.0413208,-0.028823853,0.019958496,-0.014335632,0.0124435425,-0.04373169,0.027801514,0.025726318,-0.0309906,-0.028274536,0.03164673,-0.0070877075,-0.023620605,-0.011909485,-0.012374878,-0.010238647,-0.049682617,0.04095459,-0.022735596,-0.009147644,0.010009766,-0.020507812,-0.014854431,0.004096985,0.04031372,0.028518677,-0.013244629,0.00598526,-0.056365967,-0.0038585663,-0.0061073303,-0.04260254,0.004825592,0.0044021606,-0.021224976,0.008308411,0.0113220215,-0.03829956,-0.016540527,-0.0038642883,0.004886627,0.0072288513,0.0030593872,-0.0013790131,-0.012390137,0.009819031,0.014930725,-0.0037498474,-0.078063965,-0.022842407,-0.02420044,-0.0049552917,0.0625,-0.019256592,0.04901123,0.009399414,0.060546875,0.03353882,0.052368164,0.03164673,0.022338867,0.0001257658,0.0032024384,-0.0028533936,0.068237305,-0.019363403,-0.024154663,-0.014816284,-0.02053833,-0.05517578,-0.0018110275,-0.011787415,-0.04067993,-0.010368347,0.02217102,-0.015357971,0.025100708,-0.072631836,0.003993988,0.006652832,0.0007648468,0.009971619,-0.021530151,-0.01663208,0.014640808,-0.009750366,0.023330688,0.009590149,-0.042266846,0.029586792,0.010444641,0.042022705,0.045318604,0.021240234,0.030899048,0.01109314,-0.012664795,-0.0262146,0.029052734,0.003124237,-0.011634827,0.008262634,0.00894165,-0.005809784,0.02180481,-0.015533447,0.021133423,-0.048614502,0.05621338,0.007865906,-0.01928711,0.002948761,-0.047027588,-0.015266418,0.024719238,-0.025802612,0.002571106,0.028671265,0.01876831,0.03086853,-0.015792847,-0.03161621,0.001996994,-0.024291992,-0.011222839,-0.052978516,-0.041381836,0.048675537,-0.03717041,0.020431519,0.034729004,-0.099609375,-0.008682251,-0.037750244,0.0025024414,-0.03942871,-0.011955261,-0.0053634644,0.010688782,-0.01134491,-0.007736206,-0.019119263,-0.0206604,0.002752304,0.037017822,-0.019210815,0.047210693,-0.018951416,0.021469116,0.021408081,0.013549805,0.029708862,0.027740479,-0.004432678,-0.057525635,-0.0814209,-0.013587952,0.012313843,-0.008796692,-0.042633057,0.020431519,-0.0016384125,-0.08026123,-0.027923584,-0.005470276,-0.016555786,-0.04736328,-0.005176544,-0.04196167,0.0135269165,-0.014343262,-0.06298828,-0.026046753,-0.03302002,0.0637207,0.024017334,0.0055274963,0.041137695,-0.015731812,0.053344727,0.029464722,-0.020736694,-0.02243042,0.016433716,-0.021911621,0.009849548,-0.0038719177,0.0042915344,-0.035888672,0.031951904,0.07232666,0.010070801,-0.026519775,-0.006790161,-0.046142578,-0.037231445,-0.031280518,0.0064086914,0.009407043,-0.003900528,0.033081055,-0.02709961,-0.038970947,0.000049948692,0.012390137,0.014053345,0.044708252,0.023910522,-0.00969696,0.031097412,0.020446777,-0.034179688,0.034973145,0.047027588,0.017349243,-0.031143188,-0.038726807,0.02671814,0.03250122,-0.026748657,0.018630981,-0.008972168,0.032928467,-0.0055656433,0.011505127,0.022705078,-0.012367249,-0.027740479,-0.027893066,-0.011894226,0.032928467,0.008705139,-0.018692017,-0.042785645,-0.08148193,0.04852295,0.040130615,0.028198242,-0.013847351,0.0008087158,-0.025497437,-0.015792847,-0.078186035,0.064331055,0.07244873,-0.029312134,-0.0013113022,0.02104187,-0.012039185,-0.043029785,-0.0051841736,-0.012535095,-0.028915405,-0.018447876,0.012527466,-0.040222168,0.00094127655,0.019866943,0.025970459,0.05911255,-0.0035991669,-0.052124023,-0.03741455,-0.008232117,0.0031032562,-0.020309448,-0.005092621,-0.004333496,0.026611328,0.031677246,-0.011497498,0.022003174,0.0035057068,0.002696991,-0.010063171,0.0033874512,-0.00919342,-0.031219482,0.011886597,-0.0024795532,-0.064941406,0.010643005,-0.00422287,0.05908203,-0.048553467,0.049926758,-0.01020813,0.0096206665,0.068237305,-0.0071029663,-0.042785645,0.009971619,0.03338623,0.03010559,0.034423828,0.0021781921,-0.029205322,-0.010025024,0.071777344,-0.002620697,-0.0143585205,0.011520386,0.010185242,0.038146973,0.0007157326,-0.06518555,-0.031204224,-0.010787964,-0.027893066,0.02368164,-0.020812988,0.027999878,-0.016418457,-0.0041275024,-0.02557373,-0.003768921,-0.026290894,0.017715454,-0.017242432,0.0040664673,-0.0256958,-0.019165039,0.031097412,0.022125244,-0.02079773,-0.0037078857,0.053344727,0.01159668,0.001408577,-0.028457642,-0.025054932,-0.015686035,-0.00022149086,0.03010559,0.018295288,0.008453369,0.050628662,-0.04144287,0.0069236755,0.01852417,0.020614624,0.041809082,0.0033245087,0.005214691,-0.06311035,-0.042633057,-0.02192688,-0.0440979,0.033233643,0.011009216,-0.000067949295,0.053131104,0.011161804,-0.02758789,-0.033233643,0.009719849,-0.046722412,-0.007865906,0.04083252,-0.009628296,-0.010887146,-0.00026106834,-0.00617218,0.016693115,0.02633667,0.022720337,0.011039734,0.073791504,0.040924072,0.00983429,0.026687622,0.0076904297,0.024642944,-0.008071899,-0.025726318,-0.019973755,-0.020431519,0.0075645447,-0.0039138794,-0.011917114,-0.05026245,0.03768921,0.048217773,0.08166504,0.030654907,0.005378723,0.0413208,-0.00573349,0.0050582886,-0.018325806,-0.021743774,-0.029785156,-0.054779053,0.019210815,-0.014533997,-0.0034160614,-0.016067505,0.0259552,-0.001209259,0.020355225,-0.024429321,0.04663086,-0.003993988,-0.020584106,0.019104004,0.0022640228,0.05102539,0.05758667,-0.027954102,0.025894165,0.017562866,-0.044189453,0.006465912,0.026519775,-0.011383057,-0.0020637512,-0.042755127,-0.014564514,0.003873825,-0.006187439,-0.046691895,-0.0012044907,-0.0045318604,0.013549805,0.03302002,-0.010429382,-0.015655518,0.0009765625,-0.005344391,-0.047729492,-0.01133728,-0.037994385,0.012779236,0.049591064,-0.017593384,0.0024414062,0.012084961,0.012565613,-0.013374329,0.0116119385,0.022094727,-0.0031280518,-0.040283203,0.030654907,0.0015220642,0.016525269,0.01247406,0.03010559,0.021392822,0.026565552,0.040527344,0.01109314,-0.0109939575,-0.06652832,0.015449524,-0.049926758,-0.005344391,0.033569336,-0.033081055,-0.0006456375,-0.023117065,-0.024963379,-0.037719727,0.007461548,-0.029632568,-0.0024375916,0.015075684,-0.030151367,-0.03451538,-0.061523438,-0.013908386,0.0016126633,0.056671143,0.03314209,0.012962341,-0.06866455,0.0034236908,0.03265381,0.008293152,0.0010490417,-0.014015198,0.0031051636,-0.01852417,-0.028915405,-0.0073776245,-0.003692627,0.014266968,-0.010787964,-0.0055732727,0.03363037,-0.0063438416,0.02848816,0.018188477,0.010368347,0.024261475,-0.017150879,0.0014314651,-0.0041122437,0.032989502,0.006351471,-0.028564453,-0.05227661,0.047821045,0.007972717,0.028518677,-0.031982422,-0.008758545,-0.0077171326,0.012992859,0.012237549,-0.0072631836,-0.0112838745,-0.015510559,-0.049804688,-0.06713867,0.036254883,-0.013717651,0.03112793,0.02279663,0.0005245209,0.019866943,0.004306793,-0.0050239563,0.021759033,-0.027435303,-0.014282227,-0.032073975,-0.0395813,-0.019470215,-0.01499939,-0.024459839,0.01739502,-0.018325806,0.01991272,0.0032787323,-0.020095825,0.03213501,-0.000975132,-0.0010709763,-0.00014150143,0.0037593842,0.020126343,0.035736084,0.012931824,-0.04031372,0.025817871,-0.0017023087,0.001127243,-0.015838623,0.051696777,0.021087646,-0.007286072,-0.0026435852,-0.011123657,-0.01914978,-0.02947998,0.0010881424,-0.0035037994,0.01600647,0.0033569336,-0.040283203,0.018310547,0.00053453445,-0.035369873,-0.023513794,0.007171631,0.007827759,-0.03933716,0.021240234,0.027893066,0.056365967,-0.024383545,-0.0046691895,0.0069236755,0.040283203,0.036376953,0.01335907,-0.011940002,0.029769897,-0.009391785,0.024993896,0.0033054352,-0.01939392,0.007835388,0.004234314,0.027694702,0.015266418,0.005176544,-0.020263672,-0.029174805,-0.010650635,-0.0024337769,-0.031921387,0.006252289,0.028121948,0.020431519,-0.015792847,0.0158844,0.0069084167,-0.018585205,-0.020767212,0.0013513565,0.03289795,-0.015602112,-0.013847351,0.0107040405,0.015281677,0.038726807,-0.062438965,-0.0085372925,0.008399963,0.01184845,-0.023864746,-0.037322998,-0.038024902,0.016784668,0.040039062,0.0013904572,0.01776123,0.030303955,-0.0006093979,0.0024414062,0.03793335,-0.008361816,-0.007575989,-0.008384705,-0.060302734,-0.005748749,-0.0003809929,0.0019626617,-0.026870728,0.0096588135,-0.016815186,-0.027236938,0.010055542,-0.016464233,-0.0039367676,-0.015991211,0.011581421,0.03704834,-0.0076065063,0.011222839,-0.017089844,-0.033050537,0.0016336441,0.020065308,0.017715454,-0.055114746,0.027664185,-0.018951416,-0.003791809,0.0021266937,0.011764526,0.027252197,0.028182983,0.0008430481,0.031707764,-0.04736328,0.04360962,-0.030563354,0.014793396,0.0103302,-0.03869629,-0.0055503845,-0.015281677,-0.017608643,0.045654297,-0.015960693,-0.017929077,-0.035308838,-0.028259277,-0.014411926,-0.047607422,0.019836426,0.035217285,0.031921387,-0.025939941,0.005088806,-0.007633209,0.015457153,-0.010055542,0.008346558,-0.022094727,0.022155762,0.019546509,0.006439209,-0.037200928,-0.02810669,-0.015945435,-0.0019130707,-0.04562378,-0.050231934,-0.024383545,0.01777649,-0.009544373,-0.010818481,-0.03756714,-0.015419006,-0.005367279,-0.043548584,0.017959595,0.0027770996,0.024307251,0.0010471344,-0.01725769,-0.012916565,0.020095825,-0.0034656525,0.034057617,0.011199951,-0.0000782609,-0.044006348,0.011779785,0.034332275,0.028121948,-0.0074539185,-0.005126953,-0.007980347,-0.027023315,-0.05621338,-0.0053977966,0.0051651,-0.014602661,-0.007083893,0.008972168,-0.046539307,-0.004245758,-0.027023315,-0.0049095154,0.019210815,0.0074806213,0.027404785,0.0004892349,0.016647339,-0.012664795,-0.023712158,-0.035125732,0.02708435,0.009750366,0.0027923584,0.01966858,0.055908203,0.007007599,-0.020126343,-0.0006093979,-0.0013685226,0.014526367,-0.017913818,0.013282776,-0.016723633,0.013938904,-0.021987915,-0.008506775,-0.040527344,-0.011398315,0.08709717,-0.0023212433,-0.014457703,-0.0060195923,-0.008903503,0.027954102,0.035491943,-0.028182983,-0.008483887,-0.022064209,0.023635864,-0.028152466,0.0026130676,0.014060974,0.021514893,-0.01979065,-0.05569458,-0.02432251,-0.004043579,-0.01739502,-0.06555176,-0.022949219,-0.06488037,-0.0018091202,-0.0037269592,-0.020339966,0.007911682,0.011711121,-0.006752014,-0.08477783,-0.0042495728,0.047943115,0.016098022,0.029586792,-0.018859863,0.009811401,0.027023315,-0.029251099,-0.017700195,0.033355713,-0.031677246,-0.0049057007,-0.02368164,0.027053833,-0.023544312,-0.016937256,0.006839752,0.0057792664,0.0181427,-0.013809204,0.0024986267,-0.017181396,0.008110046,-0.016433716,0.02432251,-0.00806427,-0.022827148,0.033172607,-0.039093018,0.034088135,0.016113281,-0.0010566711,0.011772156,0.030456543,0.034698486,-0.039123535,-0.013305664,0.013191223,0.01864624,0.041656494,-0.023834229,0.041778564,0.021652222,-0.0066337585,0.022399902,-0.020889282,-0.022247314,-0.036102295,-0.022216797,0.021453857,-0.010169983,0.011520386,-0.022094727,-0.0010929108,0.007106781,0.0045394897,0.018676758,-0.0037498474,-0.03515625,-0.023742676,-0.0012292862,0.008148193,0.00054597855,0.001871109,0.02558899,0.027160645,0.03643799,0.016815186,-0.016860962,-0.0027713776,0.031921387,-0.008255005,0.00868988,0.030838013,-0.0016889572,0.014167786,0.018920898,0.006362915,-0.05218506,-0.020446777,-0.023910522,-0.010955811,-0.0022830963,-0.006214142,-0.026016235,-0.016906738,-0.0025424957,-0.0011348724,-0.04071045,0.00381279,-0.021774292,-0.028945923,-0.008712769,-0.0062789917,0.025024414,0.0027332306,0.0038204193,0.017944336,-0.0044174194,0.035003662,0.0005865097,-0.011260986,0.037017822,0.03933716,0.015716553,-0.031341553,-0.0068588257,-0.02041626,-0.011451721,0.00258255,-0.02192688,0.011238098,0.0362854,-0.011512756,0.008666992,0.0044784546,0.03164673,-0.008728027,0.00969696,-0.012908936,0.019638062,-0.018981934,0.029891968,-0.05328369,0.01235199,0.017929077,-0.001408577,-0.0060195923,-0.0035247803,-0.031677246,0.0236969,-0.0003209114,-0.002374649,0.0390625,0.0038166046,0.020706177,-0.029815674,-0.018798828,-0.0005607605,-0.04498291,-0.019622803,0.018127441,-0.0042762756,0.00233078,0.024536133,-0.032348633,0.038635254,-0.030075073,0.022384644,-0.0071144104,0.011741638,-0.012397766,-0.017333984,-0.018127441,-0.021987915,-0.019714355,-0.0023956299,-0.0028076172,0.048614502,0.020843506,0.01940918,0.049713135,0.008514404,-0.0011844635,-0.036590576,-0.035858154,0.01449585,-0.023849487,0.015098572,-0.020950317,0.053497314,0.040222168,-0.004638672,0.039733887,0.029388428,0.03189087,0.0006952286,0.00592041,-0.014968872,0.01210022,-0.01020813,0.021133423,-0.0059394836,0.04269409,-0.017807007,0.029891968,0.018844604,0.024673462,-0.029815674,0.032928467,0.06762695,0.018432617,-0.014678955,0.03652954,-0.004131317,-0.012496948,-0.0067443848,-0.01828003,0.05053711,0.006652832,0.03970337,0.052734375,0.026382446,-0.0010538101,0.024093628,-0.030273438,-0.019699097,0.055480957,0.024780273,-0.02180481,-0.014205933,-0.015823364,0.0055885315,-0.044067383,-0.02909851,0.014945984,-0.017913818,0.018829346,0.006454468,0.00020492077,-0.008781433,0.018066406,0.02142334,0.0357666,-0.00920105,0.023330688,0.03805542,-0.004333496,0.014907837,-0.0034542084,0.015380859,-0.02394104,-0.014137268,0.02748108,0.024215698,-0.015052795,-0.0068206787,0.024871826,0.00712204,0.055633545,0.045562744,-0.023544312,0.013465881,0.034057617,0.0090789795,-0.011146545,0.04071045,0.03933716,0.020843506,0.040924072,0.022247314,0.028518677,-0.035064697,0.022216797,-0.0054893494,-0.0016040802,-0.021133423,0.0012817383,0.00022435188,-0.013465881,0.033172607,0.005874634,-0.019012451,0.022277832,0.028686523,0.003314972,-0.008293152,-0.00995636,0.02078247,-0.026611328,-0.00020372868,0.016479492,-0.016799927,0.02268982,-0.0042686462,0.03302002,-0.028121948,0.032592773,-0.014694214,-0.013908386,-0.011505127,0.024978638,-0.042877197,0.0011672974,-0.012207031,-0.00008606911,-0.046813965,0.012741089,0.027404785,-0.007621765,0.022399902,0.0073661804,-0.0014152527,0.0019111633,0.03567505,0.0049095154,0.00027012825,-0.009666443,-0.024246216,0.032440186,0.043395996,0.0060310364,0.012313843,-0.017456055,-0.010131836,0.00198555,-0.0073890686,-0.0062561035,-0.013618469,-0.013427734,-0.027008057,0.015899658,0.030456543,0.022613525,0.036895752,-0.0020217896,-0.017654419,0.013435364,0.03842163,0.013046265,-0.006275177,-0.014259338,0.018218994,-0.024307251,0.0491333,0.04812622,0.0077552795,0.02859497,0.003255844,-0.010383606,0.0008277893,-0.004295349,0.024230957,-0.012634277,0.009269714,-0.0002065897,0.023086548,-0.021743774,-0.025894165,0.0052833557,-0.017852783,-0.022323608,-0.019454956,0.0064888,0.011054993,0.027816772,0.04559326,0.011878967,-0.01940918,0.058654785,-0.022125244,0.041412354,0.010124207,-0.00042438507,0.04953003,0.028900146,0.041748047,0.02078247,0.010658264,-0.039276123,0.027023315,0.027694702,0.016052246,0.018310547,-0.004055023,-0.021392822,0.034240723,-0.0057144165,0.0340271,-0.005214691,-0.00025343895,0.017333984,-0.014968872,-0.0040512085,-0.0017967224,-0.013114929,0.0102005005,0.04525757,-0.038146973,-0.012641907,-0.019805908,-0.016204834,0.022399902,-0.0052719116,0.008010864,0.007587433,-0.019180298,0.023040771,-0.031173706,-0.023132324,0.011482239,0.033599854,-0.049560547,-0.014701843,0.0046310425,0.008071899,-0.017837524,0.03363037,0.021713257,0.009025574,0.00712204,0.04824829,-0.01084137,0.027359009,-0.021316528,0.03048706,0.029815674,0.007926941,-0.012748718,0.008758545,-0.0013132095,-0.01335907,0.011016846,0.0345459,-0.01940918,-0.000623703,-0.0025959015,-0.008361816,0.009056091,0.0035762787,-0.0055656433,0.0018568039,-0.011108398,-0.00957489,0.00029349327,0.010574341,0.0015459061,0.0073280334,0.0070114136,-0.009132385,0.01285553,0.0362854,0.020019531,-0.04751587,0.0002257824,0.0098724365,0.010131836,-0.025848389,-0.007827759,0.0057640076,-0.029815674,0.016616821,0.007949829,0.0019989014,0.014076233,-0.025939941,-0.0058403015,0.023071289,0.009521484,0.013435364,0.0032081604,0.0066719055,0.017730713,-0.021530151,-0.0041275024,-0.0019683838,-0.0013637543,0.014038086,0.021469116,-0.010925293,-0.028457642,0.027389526,-0.009674072,0.017562866,0.01235199,-0.005504608,0.01586914,-0.013587952,-0.0012760162,0.006713867,0.01209259,-0.0138168335,-0.014266968,-0.011795044,0.012214661,0.04977417,-0.017837524,-0.0020122528,0.01689148,0.007965088,0.022964478,0.029769897,0.015365601,0.039886475,0.036712646,-0.020858765,-0.015060425,0.020004272,-0.011001587,-0.034606934,0.018417358,-0.004673004,-0.011619568,0.01864624,0.027282715,-0.00004851818,-0.02508545,-0.0070648193,-0.012939453,-0.025253296,0.014587402,-0.013343811,0.010543823,-0.030944824,-0.017089844,0.004611969,-0.011360168,-0.034179688,-0.0234375,-0.003271103,-0.018676758,-0.048950195,0.006954193,-0.03387451,0.011428833,-0.011871338,-0.00010418892,-0.0009622574,0.017913818,-0.012840271,-0.020904541,0.004211426,0.024429321,0.022720337,0.011940002,0.028457642,-0.01902771,-0.028686523,-0.03289795,0.00081920624,-0.015899658,0.024536133,-0.010574341,0.033233643,0.015899658,-0.0013256073,-0.0022201538,-0.0069084167,-0.009742737,-0.0087890625,-0.01927185,-0.0029830933,0.021942139,0.008911133,-0.010482788,-0.013298035,0.049102783,-0.031677246,-0.028198242,0.032592773,0.046081543,-0.0023612976,0.04714966,-0.014663696,-0.00020098686,-0.013717651,0.002122879,-0.020996094,0.0035991669,-0.0016460419,0.00995636,-0.0036468506,0.008651733,0.030914307,-0.004535675,0.0013475418,0.030532837,-0.000030577183,-0.00121212,0.025314331,0.01524353,0.007255554,-0.014923096,-0.014450073,0.018630981,0.02583313,0.010803223,-0.0032081604,-0.016235352,0.008476257,-0.011238098,0.017089844,0.02293396,-0.010055542,-0.045837402,-0.016403198,-0.040618896,0.01777649,0.008071899,0.007106781,-0.00995636,0.016540527,-0.018585205,-0.025100708,-0.024795532,0.023864746,0.0061149597,-0.005004883,-0.01689148,0.007160187,0.027023315,-0.028915405,-0.000027179718,-0.04776001,-0.028869629,-0.008377075,-0.017532349,0.023422241,0.014419556,-0.011161804,-0.0046844482,-0.012298584,-0.0013189316,0.005203247,0.027618408,-0.01626587,-0.015213013,0.024734497,0.013755798,-0.02154541,0.01939392,-0.008895874,-0.0018424988,0.010063171,-0.0064086914,0.011940002,-0.017059326,0.038116455,-0.0054969788,0.0019874573,0.025665283,-0.009628296,0.011192322,-0.04083252,0.010536194,0.0028762817,0.0031871796,0.034820557,-0.021530151,-0.01626587,0.013153076,-0.022262573,-0.030654907,0.0009379387,0.019638062,0.028274536,-0.0030384064,0.041992188,-0.012031555,-0.019119263,0.03274536,0.014152527,-0.019943237,-0.008865356,0.02494812,0.005405426,-0.005203247,-0.0031547546,-0.016433716,-0.034088135,-0.010032654,0.019134521,-0.0054473877,-0.008583069,0.023757935,0.012901306,0.04397583,-0.006023407,0.026046753,0.020980835,0.011878967,0.024414062,0.0064582825,0.04562378,-0.0035419464,-0.029388428,0.011138916,-0.00248909,-0.02861023,-0.0010614395,-0.0012130737,0.0057792664,-0.04559326,0.006752014,0.011505127,0.03717041,-0.018203735,0.013412476,-0.025665283,-0.0039634705,-0.037017822,-0.0013856888,-0.028182983,0.011154175,0.04147339,0.007659912,0.031402588,0.002506256,-0.012207031,0.0103302,0.0473938,-0.01171875,-0.02708435,-0.015930176,0.014968872,0.005970001,0.008720398,0.005142212,-0.008522034,-0.026931763,0.00010675192,-0.016311646,0.01209259,-0.0070877075,0.008270264,0.00089883804,-0.002796173,-0.0039978027,0.024627686,-0.0023708344,-0.0065574646,0.005821228,0.0015668869,0.032348633,0.03262329,-0.0113220215,0.027618408,0.021408081,-0.03817749,0.061798096,-0.0032615662,0.027999878,-0.0127334595,-0.00598526,-0.033935547,-0.030715942,-0.011955261,0.0019321442],"createdAt":"2026-04-18T18:59:43.461Z","updatedAt":"2026-04-22T07:01:35.488Z","lastSeenAt":"2026-04-22T07:01:35.488Z","tsv":"'/api/v1/transactions/270':47,175 '/request':13,28 '0.02':12,27,76,123 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':112 '20000':118 '300':139 '6':126 'Base network API' 'USDC micropayment endpoint' 'accept':103 'access':7,22,38 'addit':167 'ai':63 'analyt':62 'api':6,21,37,88,153 'base':9,24,84,114,119 'base-network' 'beyond':144 'call':4,19 'categori':59 'challeng':97 'commit':93 'confirm':98 'connect':162 'contract':111 'correspond':121 'crypto-paid API' 'data':61 'decim':127 'detail':169 'doc':152 'document':143,196 'endpoint':32,52,72,100,176 'exampl':193 'extrem':149 'financ':66 'function':172 'header':136 'includ':60 'infrastructur':69 'key':89 'land':146 'learn':65 'limit':91 'live':102 'lookup':185 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'made':130 'mani':51 'maxamountrequir':116 'may':180 'network':85 'no-api-key' 'offer':53 'one':49 'page':147,157 'paid':79 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,108,128,135 'per':3,18,77 'platform':56 'post':104 'post-method' 'premium':5,20,36 'price':74,154 'process':187 'prompt':164 'protocol':43 'provid':35 'rate':90 'readm':156 'relat':181 'render':159 'request':78,105 'requir':94 'resourc':46 'respons':194 'schema':191 'second':140 'servic':188 'settl':107 'span':58 'spars':150 'specif':45,171 'technic':168 'timeout':141 'transact':184 'unclear':178 'unit':120 'usdc':15,30,81,110,124 'usdc-settlement' 'use':125 'util':70 'via':10,25,39,131 'wallet':163 'web3':67 'window':142 'x':134 'x-payment':133 'x402':11,26,41,96 'x402 API' 'x402-payment'","prices":[{"id":"78732401-467f-4a0a-a4c9-42b02d1538a2","listingId":"584fdd9f-1d69-4462-83f4-51e32fa74daf","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/270","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:59:43.461Z"}],"sources":[{"listingId":"584fdd9f-1d69-4462-83f4-51e32fa74daf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/270","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:43.461Z","lastSeenAt":"2026-04-22T07:01:35.488Z"}],"details":{"listingId":"584fdd9f-1d69-4462-83f4-51e32fa74daf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/270 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge accepting USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/270"},{"claim":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/270"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services without traditional API key registration","Making one-off paid API calls settled instantly in USDC on Base","Integrating pay-per-use endpoints into agent workflows without subscriptions"],"bestFor":["Developers wanting frictionless pay-per-call access without signup","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.436Z"},"updatedAt":"2026-04-22T07:01:35.488Z"}}