{"id":"de7107b8-6e21-4964-8882-1b77e7c8da4b","shortId":"pefqdb","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.","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/70` 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 — you simply attach an x402 payment header to each request.\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 listed at the same $0.02/request price point.\n\nHowever, documentation 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 schema, no request/response examples, and no description of what the `/api/v1/transactions/70` endpoint actually returns or what input it expects beyond a POST request. The endpoint is live and responding with a valid x402 challenge, but without documentation it is unclear what data or functionality it provides.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-platform","finance"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","402 payment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition for any endpoint","The purpose and expected input/output of /api/v1/transactions/70 is completely undocumented","Cannot verify what data or service is actually returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/70","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no documentation beyond a landing page listing, no request/response examples, and no explanation of what this specific endpoint actually does. The docs pages are empty. 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":"2026-04-19T13:33:42.431Z","embedding":[-0.032806396,-0.036834717,0.025131226,0.00705719,0.014404297,-0.035827637,-0.021560669,0.022476196,0.072753906,-0.055267334,0.023345947,-0.046081543,-0.04135132,-0.02659607,-0.02456665,0.012413025,-0.002029419,0.0075798035,-0.03665161,0.033599854,0.03768921,-0.013801575,-0.032592773,0.025436401,0.0011758804,-0.0035877228,-0.008369446,-0.006549835,-0.029693604,-0.04598999,0.050323486,-0.023117065,-0.016235352,0.007675171,-0.007713318,-0.0061798096,0.0104904175,0.032104492,0.035369873,-0.002494812,0.0095825195,-0.06585693,0.008132935,-0.021591187,-0.04888916,-0.004627228,0.0045547485,-0.028076172,0.013519287,-0.0067596436,-0.038604736,-0.0029716492,-0.0074920654,0.009986877,0.00025749207,-0.00014293194,-0.012519836,-0.01802063,0.009971619,0.020339966,-0.009521484,-0.062286377,-0.016494751,-0.0076560974,0.007610321,0.052642822,-0.009689331,0.033813477,0.0022659302,0.07092285,0.02911377,0.045074463,0.033172607,0.020690918,-0.0037956238,-0.0061454773,-0.010223389,0.04864502,-0.010681152,-0.029769897,-0.009407043,-0.011146545,-0.06854248,-0.007881165,-0.017364502,-0.045074463,-0.026824951,0.022964478,-0.020080566,0.019958496,-0.07324219,-0.0030765533,-0.0029621124,-0.00023639202,0.0021457672,-0.019561768,-0.013473511,0.029327393,-0.007194519,0.012145996,-0.010543823,-0.044128418,0.01763916,0.011886597,0.036346436,0.04724121,0.01689148,0.021881104,0.015037537,-0.009483337,-0.039733887,0.012756348,-0.0033054352,-0.022354126,0.013633728,0.0033817291,-0.010910034,0.009544373,-0.025680542,0.019851685,-0.05105591,0.055877686,0.0044937134,0.0049743652,0.0019187927,-0.051513672,-0.012199402,0.023483276,-0.030151367,-0.0024471283,0.025177002,0.019729614,0.024276733,-0.011962891,-0.04119873,0.02357483,-0.027236938,-0.0056762695,-0.050079346,-0.026123047,0.034088135,-0.030029297,0.013519287,0.03741455,-0.10412598,-0.008338928,-0.043945312,0.014297485,-0.030227661,-0.012207031,0.016052246,0.02268982,-0.012176514,-0.016738892,-0.021377563,-0.032318115,0.0019760132,0.043395996,-0.015899658,0.042999268,-0.017608643,0.025436401,0.018600464,0.011940002,0.0074424744,0.022491455,0.005393982,-0.078125,-0.07635498,-0.020355225,0.008720398,-0.028747559,-0.028121948,0.01878357,-0.019927979,-0.07098389,-0.019683838,-0.016021729,0.0012950897,-0.046722412,-0.0007100105,-0.026535034,0.023361206,-0.0030574799,-0.05895996,-0.03439331,-0.025878906,0.052886963,0.020645142,0.022750854,0.014518738,-0.006454468,0.06021118,0.026855469,-0.007408142,-0.022247314,0.013397217,-0.016159058,0.027313232,-0.004432678,0.014717102,-0.029785156,0.032928467,0.06567383,-0.0011510849,-0.03189087,-0.003528595,-0.056549072,-0.042785645,-0.032348633,0.022857666,0.018463135,0.0007839203,0.03845215,-0.024337769,-0.036499023,0.0045394897,0.021743774,0.017089844,0.059387207,0.0012083054,-0.003982544,0.03567505,0.017425537,-0.04345703,0.049102783,0.036987305,0.00409317,-0.025650024,-0.042907715,0.030944824,0.04928589,-0.034698486,0.0033340454,-0.015350342,0.028549194,-0.0084991455,-0.0068092346,0.016830444,-0.010009766,-0.018951416,-0.026504517,-0.024612427,0.025497437,0.005279541,-0.030654907,-0.032409668,-0.07696533,0.055480957,0.033111572,0.04144287,0.0021400452,0.0044136047,-0.017944336,-0.008857727,-0.06744385,0.061035156,0.06640625,-0.005657196,-0.0056762695,0.02809143,-0.008506775,-0.0390625,0.01739502,-0.028335571,-0.023544312,-0.029953003,0.012702942,-0.044311523,-0.002401352,0.028274536,0.029815674,0.0513916,-0.009208679,-0.050628662,-0.024459839,-0.0010309219,0.0033435822,-0.024368286,0.0013551712,0.005065918,0.014724731,0.013290405,0.006088257,0.01689148,0.002735138,-0.00041103363,-0.0024318695,0.01637268,-0.008110046,-0.02671814,0.024780273,0.0023078918,-0.05117798,-0.0016288757,-0.0056915283,0.074645996,-0.04663086,0.040405273,-0.019927979,0.00881958,0.049621582,-0.009719849,-0.04849243,0.0013141632,0.020217896,0.015838623,0.042663574,0.019302368,-0.020202637,-0.017227173,0.07196045,-0.0057029724,0.0044937134,0.018676758,0.02003479,0.04373169,-0.006187439,-0.0579834,-0.041809082,-0.0013456345,-0.036132812,0.02748108,-0.018600464,0.030517578,-0.021270752,-0.0041122437,-0.02809143,0.009963989,-0.031402588,0.010597229,-0.02305603,0.011428833,-0.028564453,-0.022216797,0.008460999,0.006011963,-0.006752014,0.011077881,0.04284668,0.023605347,0.0029354095,-0.027755737,-0.025100708,-0.012702942,-0.011688232,0.019378662,0.015640259,0.018356323,0.043273926,-0.036071777,0.004261017,0.024490356,0.013908386,0.037078857,-0.0061073303,-0.0110321045,-0.061767578,-0.04660034,-0.02558899,-0.04071045,0.027740479,0.007610321,-0.01576233,0.053253174,0.016540527,-0.0075263977,-0.040496826,0.012199402,-0.04837036,-0.002412796,0.035095215,-0.020568848,-0.029815674,0.004425049,-0.008766174,0.004425049,0.033599854,0.027313232,0.037750244,0.062561035,0.03640747,0.013542175,0.026519775,-0.0036334991,0.02268982,0.012573242,-0.023376465,-0.033447266,-0.02330017,0.035888672,-0.014427185,-0.016296387,-0.064819336,0.054626465,0.040863037,0.08081055,0.020004272,0.0066871643,0.032440186,-0.0146102905,0.022018433,-0.022644043,-0.014091492,-0.016479492,-0.047454834,0.024536133,-0.002872467,-0.012145996,-0.026138306,0.040863037,-0.0036125183,0.012672424,-0.027893066,0.043060303,-0.021087646,-0.02720642,0.022949219,0.008613586,0.058746338,0.05807495,-0.045410156,0.019104004,0.02619934,-0.0259552,0.011474609,0.04208374,-0.016342163,-0.011810303,-0.04925537,-0.027496338,-0.011100769,-0.01637268,-0.03842163,0.007396698,0.0154953,0.021255493,0.024002075,-0.0013866425,-0.022613525,0.0021247864,-0.0236969,-0.0546875,0.013374329,-0.041107178,0.00598526,0.04598999,-0.020202637,-0.005558014,-0.008117676,-0.006538391,-0.004207611,0.01651001,0.018981934,0.0073165894,-0.048095703,0.030181885,0.0063705444,0.0071144104,0.017562866,0.023132324,0.018844604,0.023742676,0.0552063,0.015510559,-0.01676941,-0.07281494,0.0137786865,-0.040100098,-0.0010070801,0.020858765,-0.030944824,-0.0034770966,-0.021148682,-0.03414917,-0.019592285,0.01625061,-0.025619507,-0.004962921,0.025665283,-0.020904541,-0.027389526,-0.05886841,-0.023117065,-0.0009675026,0.06762695,0.01928711,0.0115356445,-0.07159424,-0.0013875961,0.020111084,0.0074691772,0.0345459,-0.014533997,-0.0042495728,-0.018447876,-0.030441284,-0.01890564,-0.019378662,0.028015137,-0.010253906,-0.0032196045,0.017868042,0.012962341,0.030075073,0.01374054,0.010688782,0.020889282,-0.012809753,-0.010406494,-0.010131836,0.030883789,0.01864624,-0.014137268,-0.053344727,0.04244995,0.008804321,0.038604736,-0.04498291,-0.010406494,-0.018844604,0.011642456,0.0078048706,-0.009422302,-0.0033683777,-0.0051460266,-0.043945312,-0.06903076,0.043762207,-0.025390625,0.027496338,0.03152466,0.0056114197,0.031585693,-0.013557434,0.0024471283,0.009315491,-0.029220581,-0.010437012,-0.021850586,-0.033081055,-0.020019531,-0.017089844,-0.0340271,0.023330688,-0.023132324,0.016433716,0.0044136047,-0.018005371,0.032226562,0.000385046,-0.0003168583,0.013031006,0.0007042885,0.02482605,0.029159546,0.0064697266,-0.054595947,0.02619934,0.0015068054,0.006587982,0.0037765503,0.046081543,0.026565552,-0.005744934,-0.005783081,-0.011138916,-0.022842407,-0.026931763,-0.00447464,0.01134491,0.009780884,0.009399414,-0.038238525,0.018325806,-0.0018119812,-0.034698486,-0.034332275,0.0107040405,0.015930176,-0.03250122,0.014167786,0.026977539,0.055633545,-0.018005371,-0.0008649826,-0.0012626648,0.037719727,0.038360596,0.0129470825,-0.010765076,0.02357483,-0.0043640137,0.014259338,-0.007511139,-0.013916016,0.0135269165,-0.005970001,0.021575928,0.018417358,0.004512787,-0.017547607,-0.039489746,-0.006549835,-0.01625061,-0.028823853,0.021972656,0.016326904,0.037353516,-0.020828247,0.020812988,0.022659302,-0.017700195,-0.016235352,-0.011894226,0.045928955,-0.014892578,-0.0024032593,0.0129852295,0.015853882,0.030670166,-0.052978516,-0.010635376,0.0033359528,0.009986877,-0.01473999,-0.045562744,-0.041412354,-0.0014705658,0.044311523,0.006958008,0.018310547,0.036865234,0.006336212,0.01184082,0.034484863,-0.001115799,-0.016098022,-0.01651001,-0.047668457,-0.025222778,-0.011062622,-0.0024471283,-0.029251099,0.012275696,-0.005748749,-0.02911377,0.009925842,-0.02180481,0.0006093979,-0.014633179,0.01335907,0.040985107,0.004245758,0.021072388,-0.008659363,-0.04421997,-0.00061941147,0.009216309,0.023406982,-0.036590576,0.018371582,-0.010719299,-0.013725281,0.00051403046,0.014167786,0.02027893,0.025299072,0.008094788,0.040283203,-0.04647827,0.044952393,-0.036621094,0.009819031,0.00049495697,-0.03616333,-0.016845703,-0.025100708,-0.019683838,0.040283203,-0.025726318,-0.006515503,-0.035308838,-0.03439331,-0.011253357,-0.054229736,0.019897461,0.042114258,0.036254883,-0.024810791,-0.0035419464,-0.00020575523,0.0076026917,-0.0056266785,0.0059776306,-0.014297485,0.032226562,0.029266357,0.0053596497,-0.039642334,-0.023330688,-0.018753052,-0.00242424,-0.0362854,-0.052459717,-0.011062622,0.009628296,-0.010444641,-0.008049011,-0.029144287,-0.034240723,0.0042800903,-0.03527832,0.0055007935,0.0045280457,0.01398468,0.0013904572,-0.0206604,-0.0037212372,0.0134887695,-0.018478394,0.038238525,0.006248474,-0.007499695,-0.050048828,0.011077881,0.02041626,0.021621704,-0.006565094,-0.01789856,-0.0059890747,-0.01878357,-0.0541687,0.0020561218,-0.005645752,-0.01727295,-0.01210022,0.005783081,-0.057128906,-0.0060920715,-0.026443481,0.0007715225,0.023468018,0.012306213,0.01725769,-0.0060653687,0.011878967,-0.00018453598,-0.0054359436,-0.031036377,0.0076942444,0.010505676,0.0054893494,0.031173706,0.053375244,-0.002084732,-0.024230957,0.0082473755,0.0034599304,0.019744873,-0.022079468,0.011177063,-0.015670776,0.0050086975,-0.011245728,-0.009185791,-0.032989502,0.0017299652,0.08929443,-0.0016679764,-0.0056381226,-0.005870819,-0.01651001,0.011245728,0.026824951,-0.035247803,-0.002614975,-0.02418518,0.027999878,-0.027648926,0.002544403,0.0022563934,0.017318726,-0.018722534,-0.051696777,-0.019180298,-0.012939453,-0.0020923615,-0.061187744,-0.031921387,-0.072021484,-0.001578331,-0.0039634705,-0.020263672,-0.00003427267,0.0031261444,-0.021972656,-0.081848145,-0.00039887428,0.0579834,0.0071411133,0.025360107,-0.0048675537,0.021118164,0.027038574,-0.038604736,0.0026435852,0.024536133,-0.030441284,-0.01777649,-0.022598267,0.024993896,-0.019821167,-0.011039734,0.00014567375,0.0021209717,0.010772705,-0.008415222,0.013725281,-0.0069465637,0.019699097,-0.02406311,0.011497498,-0.0135269165,-0.013748169,0.03390503,-0.049041748,0.030807495,0.0071487427,-0.012748718,0.0036525726,0.028823853,0.04220581,-0.03488159,-0.020202637,0.017684937,0.011108398,0.03137207,-0.021377563,0.05065918,0.010551453,-0.012710571,0.014427185,-0.00894165,-0.010620117,-0.022628784,-0.030044556,0.021392822,0.002254486,0.0059661865,-0.02166748,-0.0061798096,0.017425537,0.011245728,0.0121536255,-0.00642395,-0.021347046,-0.030700684,-0.004547119,0.0078125,0.0003490448,-0.0021362305,0.019241333,0.03274536,0.04019165,0.005970001,-0.020553589,0.008033752,0.035064697,-0.012359619,0.002866745,0.026046753,0.006385803,0.022460938,0.012809753,0.016067505,-0.04663086,-0.026748657,-0.025848389,-0.012878418,-0.003753662,-0.008178711,-0.009864807,-0.008926392,0.005191803,-0.01159668,-0.028884888,-0.0024700165,-0.028198242,-0.034423828,-0.010635376,-0.01638794,0.022827148,0.004425049,0.00894165,0.007083893,-0.008850098,0.03829956,-0.001455307,-0.017181396,0.035614014,0.033813477,0.01914978,-0.03466797,0.002401352,-0.015113831,-0.009742737,0.011810303,-0.038482666,0.015312195,0.0423584,-0.019439697,-0.0016059875,0.010612488,0.01727295,-0.008590698,-0.00043535233,-0.0058021545,0.01979065,-0.0124053955,0.0423584,-0.05331421,0.02848816,0.015670776,0.0062179565,-0.015960693,-0.013397217,-0.02468872,0.018981934,0.0128479,-0.016021729,0.049102783,0.001367569,0.030960083,-0.011604309,-0.027450562,0.008666992,-0.03111267,-0.02545166,0.018585205,-0.01638794,0.0016794205,0.016143799,-0.02357483,0.04196167,-0.03579712,0.015159607,0.011558533,0.011444092,-0.0041542053,-0.013618469,0.0017223358,-0.013267517,-0.017349243,0.0033721924,-0.012191772,0.053894043,0.01687622,0.024124146,0.052520752,0.019302368,0.0026245117,-0.041229248,-0.02331543,0.0030002594,-0.01109314,0.024475098,-0.019134521,0.055511475,0.034210205,0.0002527237,0.04019165,0.025253296,0.034210205,0.0012083054,0.007160187,-0.015930176,0.01625061,0.0009188652,0.024597168,-0.0044898987,0.03125,-0.035888672,0.028305054,0.0134887695,0.02508545,-0.03274536,0.031173706,0.06359863,0.02494812,-0.010047913,0.041809082,-0.010353088,-0.008743286,-0.011634827,-0.017959595,0.054229736,0.007637024,0.04788208,0.052093506,0.012168884,0.0033187866,0.022506714,-0.022949219,-0.018447876,0.06524658,0.02557373,-0.01586914,-0.009353638,-0.00086402893,0.012542725,-0.04095459,-0.020889282,0.023605347,-0.015403748,0.009399414,-0.004737854,-0.007091522,-0.012748718,0.007785797,0.010986328,0.008987427,-0.00843811,0.027893066,0.032836914,-0.0025749207,0.023757935,-0.0036258698,0.018447876,-0.021881104,-0.022857666,0.024246216,0.027786255,-0.003042221,-0.010154724,0.027053833,0.013397217,0.031066895,0.0435791,-0.023208618,0.006465912,0.027648926,0.012138367,0.00082683563,0.04928589,0.031036377,0.008995056,0.03643799,0.029586792,0.038391113,-0.0440979,0.020462036,-0.0020275116,0.0041885376,-0.018203735,-0.013267517,0.0074920654,-0.020523071,0.014755249,0.00069999695,-0.013877869,0.026412964,0.021118164,-0.008049011,-0.0051994324,-0.006122589,0.0077590942,-0.02519226,-0.0077667236,0.004787445,-0.011779785,0.037597656,0.009376526,0.026519775,-0.032196045,0.024353027,0.006290436,-0.007369995,0.000644207,0.020553589,-0.041992188,0.0033283234,-0.003610611,0.004676819,-0.054107666,0.0068893433,0.02305603,-0.003929138,0.01852417,0.018508911,-0.002632141,-0.005722046,0.029373169,0.013160706,-0.0072784424,-0.002954483,-0.02230835,0.018463135,0.040283203,-0.0025691986,-0.0072135925,-0.028717041,-0.0072784424,0.0051193237,-0.012367249,-0.0022907257,-0.00818634,-0.020462036,-0.013916016,0.02357483,0.040405273,0.01763916,0.058807373,-0.025009155,-0.011779785,0.01184845,0.03543091,0.002571106,-0.007286072,-0.003528595,0.014717102,-0.016204834,0.049957275,0.032196045,0.014541626,0.03125,0.0030555725,-0.017440796,0.006011963,-0.01626587,0.02218628,-0.007820129,0.00090026855,0.00095033646,0.03503418,-0.012916565,-0.034301758,0.002840042,-0.0184021,-0.027862549,-0.013839722,0.017730713,0.0022640228,0.021392822,0.04397583,0.024642944,-0.01574707,0.058166504,-0.019622803,0.050354004,0.0020580292,-0.0121536255,0.051574707,0.016021729,0.03503418,0.009918213,0.018218994,-0.037322998,0.012176514,0.023971558,0.027496338,0.015716553,0.0013618469,-0.017562866,0.039520264,-0.0022029877,0.033355713,0.0039405823,0.0022029877,0.019332886,-0.0023174286,-0.0154800415,-0.0039711,-0.011108398,0.009239197,0.045013428,-0.030029297,-0.008934021,-0.030548096,-0.01058197,0.017074585,-0.021820068,0.0016260147,-0.0028686523,-0.017654419,0.010803223,-0.025497437,-0.023956299,0.007675171,0.023971558,-0.05407715,-0.008399963,0.0041236877,0.030593872,-0.015655518,0.02911377,0.023132324,-0.0044059753,0.00687027,0.050109863,-0.005958557,0.030838013,-0.00868988,0.033477783,0.032836914,0.009231567,-0.022399902,0.003900528,0.0055732727,-0.015731812,0.014183044,0.038238525,-0.014190674,0.0018177032,-0.004562378,-0.0053100586,0.0010347366,0.009895325,-0.0064926147,0.011505127,-0.012840271,-0.014404297,0.0036716461,0.008636475,0.0005302429,0.0008945465,0.0019721985,-0.014099121,0.0063056946,0.032714844,0.016189575,-0.031280518,-0.0017557144,0.006526947,0.0026168823,-0.013946533,-0.015853882,-0.0042877197,-0.041290283,0.009155273,0.014137268,0.011100769,0.013137817,-0.022659302,0.0027751923,0.023666382,0.0121536255,0.012466431,0.0055389404,0.0016260147,0.011955261,-0.010826111,-0.005317688,-0.0021190643,-0.008010864,0.016082764,0.017974854,-0.0004439354,-0.03237915,0.021881104,-0.00015974045,0.017715454,-0.0030956268,-0.008148193,0.017562866,-0.005874634,-0.0011415482,0.004924774,0.012832642,-0.011581421,-0.01727295,-0.012580872,0.041229248,0.05709839,-0.011520386,-0.0063667297,0.018554688,0.018814087,0.013313293,0.03564453,0.0021648407,0.045837402,0.026412964,-0.007507324,-0.024002075,0.029220581,-0.01360321,-0.031021118,0.018463135,-0.012184143,-0.018417358,0.023742676,0.011711121,0.005405426,-0.035705566,-0.008102417,-0.011009216,-0.012794495,0.021438599,-0.0121536255,0.013084412,-0.029708862,-0.016464233,0.016281128,-0.021469116,-0.0435791,-0.02192688,-0.0060539246,-0.011520386,-0.054016113,0.0066986084,-0.02458191,0.010269165,-0.028671265,-0.0009675026,-0.0074882507,0.014427185,-0.0135269165,-0.012756348,0.004562378,0.028900146,0.032104492,0.009544373,0.023727417,-0.034301758,-0.012954712,-0.03173828,0.009178162,-0.008773804,0.025009155,-0.001739502,0.03302002,0.026977539,-0.01360321,-0.0072898865,-0.0074424744,-0.008995056,-0.020309448,-0.01486969,-0.020385742,0.027374268,0.015090942,-0.011779785,-0.013046265,0.04525757,-0.026687622,-0.01966858,0.033233643,0.03945923,0.013114929,0.032836914,-0.01826477,-0.0003042221,-0.02507019,-0.002105713,-0.020004272,0.0060424805,0.0069389343,-0.0019226074,0.0013303757,0.00472641,0.019332886,-0.0043258667,0.00068187714,0.04647827,0.0057144165,-0.00053310394,0.035491943,0.0103302,0.0079956055,-0.01966858,-0.005470276,0.021499634,0.042053223,0.0058250427,0.00957489,-0.007911682,0.003545761,-0.011764526,0.009941101,0.017364502,-0.021194458,-0.04574585,-0.017974854,-0.03439331,0.028305054,-0.0055999756,0.007965088,-0.0154800415,0.016830444,-0.009178162,-0.03717041,-0.023483276,0.028564453,0.017547607,-0.015350342,-0.010894775,0.016860962,0.008522034,-0.039093018,0.0007920265,-0.05142212,-0.03189087,-0.0030651093,-0.026138306,0.029663086,0.009605408,-0.011734009,-0.0043144226,-0.006336212,-0.0053215027,0.0074272156,0.02557373,-0.008338928,-0.009628296,0.024642944,0.034332275,-0.008911133,0.016311646,-0.0049438477,0.0016012192,0.007583618,-0.020065308,0.019760132,-0.018249512,0.02760315,-0.015960693,-0.010467529,0.026412964,-0.008728027,0.014846802,-0.032409668,0.0070114136,-0.0025939941,-0.0085372925,0.036987305,-0.032989502,-0.01889038,0.0056114197,-0.014503479,-0.025222778,0.0022201538,0.016983032,0.029190063,-0.002538681,0.05343628,-0.018295288,-0.010810852,0.019210815,0.0135650635,-0.017074585,0.005722046,0.03741455,-0.006614685,-0.0053482056,0.00054597855,-0.018707275,-0.027313232,-0.008728027,0.017471313,-0.0088272095,-0.0047073364,0.03326416,0.018371582,0.040771484,-0.004611969,0.01687622,0.008842468,0.004886627,0.03265381,0.005050659,0.06072998,-0.0003271103,-0.028640747,0.0061798096,0.0051116943,-0.026641846,0.016235352,-0.0019388199,0.003446579,-0.042053223,0.019546509,-0.00040483475,0.019927979,-0.022766113,0.015312195,-0.021255493,-0.013343811,-0.03616333,0.0034828186,-0.03555298,0.0043144226,0.035064697,0.006111145,0.028015137,-0.0034313202,-0.018508911,0.022949219,0.047943115,-0.00466156,-0.028640747,-0.014945984,0.014373779,-0.00004041195,0.0184021,-0.0013856888,-0.02748108,-0.017715454,0.0033569336,-0.016540527,0.0050582886,-0.0056991577,0.014595032,0.011650085,-0.0006504059,-0.01247406,0.022277832,-0.0064315796,-0.0045280457,0.009857178,-0.004047394,0.02822876,0.026412964,-0.017181396,0.017059326,0.010406494,-0.046295166,0.064331055,0.005558014,0.02748108,-0.022338867,-0.00063943863,-0.0345459,-0.020202637,-0.025314331,0.005680084],"createdAt":"2026-04-18T19:26:55.655Z","updatedAt":"2026-04-23T08:31:55.907Z","lastSeenAt":"2026-04-23T08:31:55.907Z","tsv":"'/api/v1/transactions/70':60,196 '/request':13,30,156 '0.02':12,29,82,155 '000':76 '20':75 '402':70 '402 payment API' 'Base network API' 'USDC API' 'accept':50 'access':66,96 'across':112 'actual':198 'advertis':87 'ai':122 'analysi':126 'analyt':116 'api':5,15,22,32,42,65,89,166 'attach':99 'base':8,25,55,77 'beyond':205 'broader':108 'call':4,21,84 'categori':114 'challeng':71,219 'classif':129 'connect':175 'content':181 'convers':146 'data':115,119,227 'descript':192 'doc':165 'document':160,222 'embed':130 'endpoint':59,111,149,197,210 'estim':140 'exampl':189 'exchang':135 'expect':204 'export':120 'extrem':162 'feed':134 'financ':131 'four':113 'function':229 'gas':139 'generat':147 'geocod':144 'header':103 'howev':159 'i.e':81 'infrastructur':142 'input':202 'insight':121 'instant':95 'json-response' 'key':16,33,90 'learn':124 'limit':93 'list':62,151 'live':212 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':123 'metric':117 'micropayment API' 'network':9,26,56 'no-api-key' 'offer':110 'openapi':185 'page':170 'pay':2,19,39 'pay per call API' 'pay-per-cal':1,18 'pay-per-request':38 'payment':52,102 'per':3,20,40,83 'platform':6,23,43,86,109 'point':158 'post':207 'post-endpoint' 'premium':64 'price':133,157,167 'prompt':177 'protocol':48 'provid':231 'quot':138 'rate':92,136 'readm':169 'render':172 'report':118 'request':41,72,106,208 'request/response':188 'requir':17,34 'respond':214 'return':68,199 'schema':186 'sentiment':125 'simpli':98 'spars':163 'specif':58 'summar':128 'text':127 'token':137 'unclear':225 'unit':78 'usdc':51,80 'usdc-base-network' 'use':45 'util':143 'valid':145,217 'via':10,27 'wallet':176 'web3':132 'without':221 'x402':11,28,47,101,218 'x402 API' 'x402-payment'","prices":[{"id":"8da1c9bd-eda5-4be1-a481-713eeac9e7ca","listingId":"de7107b8-6e21-4964-8882-1b77e7c8da4b","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:55.655Z"}],"sources":[{"listingId":"de7107b8-6e21-4964-8882-1b77e7c8da4b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:55.655Z","lastSeenAt":"2026-04-23T08:31:55.907Z"}],"details":{"listingId":"de7107b8-6e21-4964-8882-1b77e7c8da4b","quickStartSnippet":"# The endpoint requires an x402 payment header with USDC on Base.\n# Using curl with the x402 protocol:\ncurl -X POST https://lowpaymentfee.com/api/v1/transactions/70 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <your-x402-payment-token>\"","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/70"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises no API keys, no rate limits, instant access, and Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/70"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless API access with crypto micropayments","Low-volume, on-demand API consumption without subscriptions"],"notFor":["Production workloads requiring well-documented, stable APIs with SLAs","Users without a Base network USDC wallet","High-volume use cases where $0.02/request adds up significantly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:36.528Z"},"updatedAt":"2026-04-23T08:31:55.907Z"}}