{"id":"6368c2a9-f30b-4fa9-8501-86c413d7e67a","shortId":"M7ZH3G","kind":"x402","title":"x402-gated API key endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated API key endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is part of a broader platform that offers a variety of pay-per-call API endpoints spanning data & analytics, 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, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/apikeys/69` appears to be an API key provisioning or access endpoint. The x402 challenge confirms it is live, accepting POST requests, and requires a payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — the payment itself serves as the access credential.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what this particular endpoint returns. The platform's landing page lists many endpoints but provides no technical documentation for any of them.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","api-key-provisioning","no-rate-limits"],"categories":["infrastructure","api-access"],"synonyms":["premium API access","x402 API key","pay-per-call API","USDC API payment","Base network API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format","Unclear what /api/v1/apikeys/69 actually returns upon successful payment","Platform lists many endpoints but none have documented behavior or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/apikeys/69","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/apikeys/69","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 challenge, but there is zero documentation beyond the landing page listing. No OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually returns. The docs/pricing/README pages are all empty wallet-connect stubs.","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":"2026-04-19T15:18:31.711Z","embedding":[-0.013961792,-0.026824951,0.046173096,0.010063171,0.012748718,-0.04284668,-0.011070251,0.05718994,0.061157227,-0.081726074,0.018981934,-0.04067993,-0.046875,-0.045654297,-0.028335571,0.009536743,-0.036010742,0.014259338,-0.06124878,0.03201294,0.03503418,-0.02142334,-0.0031528473,0.06100464,0.0020484924,-0.012802124,-0.01789856,-0.024597168,-0.007270813,-0.04031372,0.030212402,-0.025238037,-0.017715454,0.028289795,-0.026397705,-0.0032596588,-0.0021476746,0.037597656,0.0289917,-0.008483887,-0.004447937,-0.06414795,0.0005645752,0.020202637,-0.032562256,-0.0093307495,-0.004016876,-0.03439331,-0.022735596,-0.0029296875,-0.038513184,-0.003074646,-0.021148682,-0.005844116,0.002658844,0.010871887,-0.016983032,-0.025482178,0.0014648438,0.018585205,0.028076172,-0.052947998,-0.0056037903,0.013725281,0.0026073456,0.048919678,0.0002770424,0.05734253,0.008644104,0.051239014,0.03933716,0.04827881,0.026748657,0.009895325,-0.013923645,-0.0014095306,-0.011642456,0.062286377,0.00017559528,-0.014663696,-0.016326904,-0.01525116,-0.04837036,-0.015838623,-0.017028809,-0.076171875,-0.029556274,0.0053253174,-0.016235352,0.029693604,-0.0725708,-0.020965576,-0.007156372,0.026626587,0.0155181885,0.008850098,-0.03994751,0.020431519,-0.004814148,0.020828247,0.011810303,-0.03894043,0.013031006,0.018081665,0.053100586,0.042633057,0.015838623,0.023880005,0.003200531,-0.028198242,-0.040649414,-0.00041532516,-0.013427734,-0.015991211,0.025283813,-0.011909485,-0.014816284,0.011146545,-0.027816772,0.017852783,-0.059051514,0.052520752,0.026000977,-0.022354126,0.00422287,-0.05770874,-0.0052871704,-0.0028896332,-0.041168213,-0.023498535,0.009597778,0.0017547607,0.025222778,0.0002412796,-0.03768921,0.010231018,-0.014724731,-0.015014648,-0.051940918,-0.0052261353,0.019989014,-0.036102295,0.029953003,0.033203125,-0.10443115,-0.015777588,-0.051971436,0.017059326,-0.031402588,-0.018051147,0.02078247,0.008216858,-0.0008497238,-0.010658264,-0.0030117035,-0.013633728,-0.017333984,0.031280518,-0.007835388,0.044647217,-0.017333984,0.045928955,0.031173706,0.0158844,0.020812988,0.05130005,0.0041770935,-0.08416748,-0.07373047,-0.040405273,-0.010375977,-0.0112838745,-0.031173706,0.02229309,-0.020523071,-0.066589355,-0.032806396,-0.0016088486,-0.014808655,-0.036315918,-0.008407593,-0.019439697,0.006629944,-0.004299164,-0.05102539,-0.0073394775,-0.016723633,0.059051514,0.0127334595,-0.0046463013,0.029296875,-0.009162903,0.05255127,0.010002136,-0.011260986,-0.041229248,0.01008606,-0.022537231,0.036956787,0.010215759,-0.00073194504,-0.031799316,0.030807495,0.057617188,0.019134521,-0.020431519,0.012046814,-0.046936035,-0.034729004,-0.019058228,0.011833191,0.008346558,-0.000436306,0.01133728,-0.031219482,-0.02078247,-0.0048446655,0.011138916,0.021148682,0.05532837,-0.01423645,-0.00075769424,0.012069702,0.029800415,-0.03591919,0.051879883,0.030593872,0.024856567,-0.023727417,-0.0211792,0.025894165,0.03286743,-0.032440186,0.008140564,-0.025039673,0.014541626,-0.0009889603,0.0037593842,0.013557434,-0.016479492,-0.009643555,-0.0362854,-0.019927979,0.030960083,-0.0023002625,-0.0132369995,-0.0463562,-0.06347656,0.040222168,0.03933716,0.021224976,0.0028820038,0.008255005,-0.022735596,-0.009246826,-0.061706543,0.04864502,0.08203125,-0.012641907,-0.021835327,0.022598267,-0.016143799,-0.026184082,-0.0121154785,0.0014457703,-0.02935791,-0.020584106,0.02243042,-0.040008545,0.00047779083,0.0146865845,0.026229858,0.051757812,-0.025238037,-0.022567749,-0.02104187,0.0031871796,0.005794525,-0.04928589,-0.018600464,0.017028809,0.010513306,0.046661377,-0.009246826,0.024032593,-0.0035247803,0.021270752,-0.0115737915,-0.022262573,-0.02243042,-0.022354126,0.027679443,0.018676758,-0.05026245,0.038635254,-0.0013027191,0.043914795,-0.045837402,0.023880005,-0.015182495,0.02218628,0.044403076,-0.015792847,-0.055847168,-0.014297485,0.030670166,0.039978027,0.052825928,0.02633667,-0.000010251999,0.01574707,0.07116699,-0.014884949,-0.008056641,0.004688263,0.01637268,0.03717041,-0.0031795502,-0.0574646,-0.03942871,-0.01751709,-0.026779175,0.020462036,-0.019927979,0.02810669,-0.009864807,-0.0077285767,-0.013137817,0.015327454,-0.030517578,0.02104187,-0.034851074,0.009407043,-0.014274597,-0.030883789,-0.0030326843,0.034576416,-0.00969696,0.00674057,0.045654297,0.00093984604,-0.012916565,-0.023223877,-0.016921997,-0.015777588,0.002746582,0.044189453,0.019210815,0.015838623,0.039276123,-0.035064697,0.023529053,0.013923645,0.0046844482,0.038726807,-0.010391235,-0.0017175674,-0.04598999,-0.04989624,-0.013191223,-0.024856567,0.030212402,-0.0017156601,-0.0078125,0.0519104,-0.016693115,-0.009216309,-0.05480957,0.014335632,-0.03237915,-0.0018491745,0.025390625,-0.016906738,-0.041931152,0.006614685,0.0020275116,0.016967773,0.027145386,0.021987915,-0.00059747696,0.0791626,0.03543091,-0.00390625,0.0046806335,0.014411926,0.0025863647,-0.0077781677,-0.024002075,-0.026351929,0.015625,0.030075073,-0.024993896,-0.027923584,-0.0715332,0.078552246,0.035980225,0.066833496,0.012794495,0.0067253113,0.05328369,-0.020950317,0.004306793,-0.0101623535,-0.0065956116,-0.016159058,-0.053344727,0.027404785,-0.015106201,-0.0031204224,-0.04257202,0.04562378,0.008781433,0.014595032,-0.05593872,0.055511475,0.0096588135,-0.00089788437,0.014846802,0.0072669983,0.04559326,0.046936035,-0.03970337,-0.011436462,0.014755249,-0.026794434,0.0061798096,0.040527344,0.0030517578,-0.010482788,-0.056884766,-0.02885437,-0.004535675,-0.019500732,-0.06512451,-0.0076904297,0.015457153,0.014221191,0.025634766,-0.035217285,-0.027786255,-0.0037403107,-0.030212402,-0.05444336,0.013572693,-0.056762695,0.021850586,0.041534424,-0.039245605,-0.010482788,0.0025177002,-0.008079529,-0.019241333,0.023117065,0.017654419,0.009025574,-0.047973633,0.03173828,0.013999939,-0.0010023117,0.016845703,0.018310547,0.034118652,0.010070801,0.03237915,0.0184021,-0.018554688,-0.05303955,0.034423828,-0.03945923,0.01209259,0.004196167,-0.030654907,-0.009399414,-0.014724731,-0.035888672,-0.02168274,0.014480591,-0.015144348,0.011207581,0.04156494,-0.048706055,-0.014984131,-0.059173584,-0.027404785,-0.0015115738,0.06738281,0.032104492,-0.007835388,-0.0546875,-0.009300232,0.0105896,0.0056915283,0.0064888,-0.014556885,-0.005065918,-0.0035686493,-0.009887695,-0.032958984,-0.014854431,0.040863037,-0.015029907,-0.00007081032,0.017227173,0.023025513,-0.0014381409,0.016906738,0.006214142,0.027923584,-0.03414917,-0.0024909973,-0.023529053,0.0034503937,-0.001991272,-0.006713867,-0.038360596,0.039978027,0.0075149536,0.046051025,-0.032714844,0.0030498505,0.005004883,0.017303467,0.01638794,0.0020980835,-0.005592346,0.0038318634,-0.043182373,-0.06750488,0.038085938,-0.0146865845,0.032562256,0.008804321,0.0042266846,0.029693604,-0.015327454,-0.001115799,0.031402588,-0.034454346,-0.015144348,-0.03137207,-0.028305054,-0.019180298,0.014183044,-0.027297974,0.0138549805,-0.008232117,0.0040359497,-0.013450623,-0.029037476,0.023239136,0.014389038,-0.00598526,0.009269714,-0.0012187958,0.018249512,0.04864502,0.0029010773,-0.023727417,0.033325195,0.0036201477,0.007774353,0.0036811829,0.03475952,0.027053833,-0.021774292,0.0043029785,0.007980347,-0.009155273,-0.0154953,-0.015274048,0.009597778,0.02470398,0.00029563904,-0.0390625,0.016433716,0.022125244,-0.021621704,-0.010681152,0.024673462,0.03125,-0.035736084,0.020309448,0.014663696,0.060302734,-0.008300781,-0.00856781,-0.0054473877,0.030731201,0.012863159,0.0040283203,-0.018585205,0.008079529,-0.021560669,0.007572174,-0.0077400208,0.0060691833,0.020889282,-0.013870239,-0.00059461594,0.01889038,0.0060424805,-0.008651733,-0.040863037,-0.0070495605,-0.01146698,-0.01612854,0.007843018,0.017700195,0.025848389,-0.029144287,0.022201538,0.020523071,-0.02078247,-0.015792847,-0.013038635,0.04714966,-0.004638672,0.002286911,0.0034809113,0.005218506,0.027709961,-0.04562378,-0.006389618,0.022491455,0.018203735,-0.021575928,-0.068603516,-0.03353882,-0.010147095,0.046447754,0.00504303,0.0052604675,0.019882202,0.0016860962,-0.007911682,0.017074585,0.008140564,-0.014678955,-0.012451172,-0.033081055,-0.016281128,0.0029335022,-0.001865387,-0.016860962,0.023956299,-0.022628784,-0.023757935,0.01348114,-0.0026302338,-0.012199402,-0.0029239655,0.0069618225,0.029876709,0.0035552979,0.015823364,-0.024108887,-0.031097412,0.0004813671,0.020614624,0.015052795,-0.037506104,0.029708862,-0.018432617,-0.017959595,-0.009544373,0.0011434555,0.0070724487,0.017303467,-0.0022239685,0.02999878,-0.056152344,0.03717041,-0.049194336,0.0045547485,-0.004798889,-0.02078247,-0.0030727386,-0.04260254,-0.02432251,0.03652954,-0.0113220215,0.0025405884,-0.026824951,-0.032165527,0.005584717,-0.057495117,0.030288696,0.029373169,0.031219482,-0.04107666,0.0031394958,0.0017061234,0.002281189,-0.0044937134,-0.007160187,0.001288414,0.025161743,0.032226562,-0.0051498413,-0.028671265,-0.016281128,-0.010467529,-0.005138397,-0.03817749,-0.053588867,-0.01209259,0.02734375,0.0005583763,0.006515503,-0.038604736,-0.026748657,0.003982544,-0.042266846,0.010650635,-0.006713867,-0.0005784035,0.0022563934,-0.014022827,0.004512787,0.03237915,-0.041046143,0.04711914,-0.0072288513,-0.0127334595,-0.03152466,0.0052375793,0.045196533,0.017105103,0.0033054352,-0.014022827,-0.009963989,-0.028808594,-0.043884277,-0.010665894,-0.013191223,0.009429932,0.01146698,0.0040664673,-0.0541687,-0.020950317,-0.03050232,-0.010482788,0.021087646,0.040802002,0.00969696,0.000019848347,0.009803772,-0.009971619,-0.013305664,-0.033203125,0.008026123,0.010444641,-0.0026550293,0.02947998,0.051208496,0.025283813,-0.007293701,0.0065078735,0.005203247,0.024673462,-0.020523071,0.013130188,-0.031707764,0.0064353943,0.00019419193,-0.017669678,-0.02633667,-0.0012264252,0.0814209,0.01335144,-0.0011987686,-0.0055274963,-0.017700195,0.016738892,0.032989502,-0.06402588,-0.00024008751,-0.022857666,0.017028809,-0.012969971,0.00995636,0.0016899109,-0.0058288574,-0.019424438,-0.052520752,0.002828598,0.007030487,0.0026187897,-0.06414795,-0.018997192,-0.04449463,-0.02079773,-0.018676758,-0.011772156,-0.00630188,0.0047569275,-0.021713257,-0.084472656,0.007381439,0.051483154,0.02279663,0.0067710876,-0.014778137,-0.008300781,0.019210815,-0.032989502,-0.017608643,0.0262146,-0.018493652,-0.022644043,-0.0236969,0.037384033,-0.023712158,-0.020080566,0.02015686,0.0014686584,0.041290283,-0.0028018951,0.01751709,-0.0069389343,0.010063171,-0.011314392,-0.0014791489,-0.0055999756,-0.011482239,0.024383545,-0.051330566,0.018096924,0.015037537,0.019760132,0.009857178,0.02267456,0.037139893,-0.04800415,-0.015930176,0.022232056,-0.013114929,0.02078247,-0.030700684,0.045440674,0.014038086,-0.006465912,0.010391235,-0.010192871,-0.029266357,-0.05328369,-0.032043457,0.023971558,0.01826477,0.014480591,-0.0068740845,-0.0008482933,0.029006958,0.0039405823,0.0069999695,-0.02760315,-0.018661499,-0.02468872,-0.008407593,0.01158905,0.0041618347,0.002790451,0.017944336,0.028305054,0.039733887,-0.008804321,-0.008026123,0.00667572,0.013725281,-0.007270813,-0.0042266846,0.017227173,0.017456055,0.006790161,0.026672363,0.016677856,-0.038635254,-0.013664246,-0.026855469,-0.01260376,0.014282227,-0.01335144,-0.012832642,-0.014015198,0.004383087,0.010955811,-0.03640747,0.016403198,-0.05218506,-0.020355225,0.0049743652,-0.006214142,0.013595581,0.012741089,0.011924744,0.008964539,0.012260437,0.06677246,0.008926392,-0.0033893585,0.031280518,0.05117798,0.01146698,-0.024383545,-0.0015602112,-0.008575439,0.005596161,0.004234314,-0.027053833,0.02418518,0.032287598,-0.027893066,0.020965576,0.010978699,0.01940918,-0.025497437,-0.002073288,0.00027561188,0.014183044,-0.027114868,0.03488159,-0.037506104,0.003982544,0.018981934,0.00605011,-0.0031700134,-0.030075073,-0.025344849,-0.0007548332,0.003944397,-0.027862549,0.037750244,-0.005622864,0.025238037,-0.01576233,-0.01965332,0.0015468597,-0.037231445,-0.026794434,0.025527954,-0.019958496,-0.01158905,0.017852783,-0.0234375,0.033111572,-0.028671265,-0.002576828,0.02468872,-0.010871887,-0.015335083,0.003873825,-0.019088745,-0.012359619,-0.0034828186,-0.012557983,-0.0020427704,0.04751587,0.04827881,0.018432617,0.04510498,0.0047569275,-0.000647068,-0.04989624,-0.021148682,-0.0035133362,-0.021392822,0.017440796,-0.003578186,0.050323486,0.029327393,0.0119018555,0.031402588,0.030410767,0.018569946,-0.010803223,0.017700195,-0.0095825195,0.023712158,-0.008323669,0.025924683,-0.007663727,0.040374756,-0.049224854,0.0020980835,0.0062561035,0.016159058,-0.026641846,0.0368042,0.06921387,0.034301758,-0.011207581,0.040924072,-0.0061531067,-0.00541687,-0.029174805,-0.014312744,0.053649902,0.00894165,0.039093018,0.041229248,0.0047035217,0.0034275055,0.020523071,-0.027496338,-0.027450562,0.064575195,0.025253296,-0.026794434,-0.0055503845,-0.009460449,0.01361084,-0.05065918,-0.029800415,0.010902405,-0.004966736,-0.0021762848,-0.022018433,-0.006652832,-0.022888184,0.005847931,0.023132324,0.018310547,-0.01739502,0.031097412,0.013397217,0.0026760101,0.031219482,0.005760193,0.034088135,-0.027679443,-0.019104004,0.011413574,0.02859497,0.006790161,-0.012290955,0.01889038,0.020614624,0.06451416,0.03729248,-0.016906738,0.0010023117,0.027786255,0.02166748,0.004245758,0.051818848,0.02758789,0.0054855347,0.031585693,0.032470703,0.020523071,-0.035858154,-0.0024795532,0.004512787,0.008613586,-0.01991272,-0.029968262,0.010650635,-0.021224976,0.016326904,-0.0067634583,-0.013908386,0.033996582,0.026824951,0.0037021637,0.0060920715,-0.0017566681,0.009231567,-0.008102417,-0.0006275177,0.009643555,-0.01260376,0.029953003,0.014503479,0.017501831,-0.033447266,0.022781372,0.0043945312,-0.017074585,-0.012481689,0.006679535,-0.05126953,0.00023376942,0.0014505386,-0.0028858185,-0.027999878,0.014846802,0.026824951,0.0041885376,0.034210205,0.016937256,0.0020618439,0.002922058,0.009513855,0.017913818,-0.011581421,-0.006385803,-0.024230957,0.0053253174,0.027679443,-0.0046081543,0.017807007,-0.025604248,0.0134887695,0.009819031,-0.02961731,0.0082092285,0.0044136047,-0.021057129,-0.03250122,0.008705139,0.05114746,0.017852783,0.029769897,-0.012016296,-0.0146484375,0.0059280396,0.02330017,0.010879517,0.02067566,-0.022384644,0.026779175,-0.0023345947,0.04598999,0.02961731,0.011672974,0.023529053,-0.0206604,-0.016983032,0.009307861,-0.009674072,0.0104599,-0.024902344,0.01083374,-0.0040245056,0.032043457,-0.018508911,-0.027404785,0.005710602,-0.019165039,-0.008232117,-0.025772095,0.012702942,0.008895874,0.020965576,0.0496521,0.028640747,-0.018096924,0.064819336,-0.0063171387,0.05911255,-0.022842407,-0.013877869,0.04724121,0.031463623,0.024490356,0.00920105,0.0018148422,-0.013580322,0.007583618,0.041503906,0.03781128,-0.0048103333,0.0015525818,-0.017303467,0.023391724,-0.0011024475,0.026641846,0.0005683899,-0.015930176,-0.00034546852,-0.0024738312,-0.03274536,0.0016908646,-0.010025024,0.00021672249,0.042022705,-0.044769287,-0.025375366,-0.021026611,-0.02609253,0.026473999,-0.008270264,0.014221191,-0.011627197,-0.027008057,0.0043296814,-0.018753052,-0.0052986145,-0.0053520203,0.034423828,-0.04916382,-0.012054443,-0.005897522,0.02848816,-0.015930176,0.021255493,0.035125732,-0.013412476,0.0013542175,0.042297363,-0.0037784576,0.039886475,-0.013931274,0.02911377,0.047424316,0.010055542,-0.0044822693,0.014465332,0.007167816,-0.020401001,0.008453369,0.035369873,-0.004043579,0.008758545,0.007030487,-0.015388489,0.0124435425,0.0062789917,-0.0047798157,0.0037460327,-0.010147095,-0.0016965866,-0.0016021729,0.025405884,0.005970001,-0.0059547424,-0.009292603,-0.016311646,0.020736694,0.034454346,0.004753113,-0.033813477,-0.0054359436,0.019851685,0.016464233,-0.013374329,-0.020431519,-0.010772705,-0.048065186,0.012825012,0.031219482,0.010757446,-0.004878998,-0.031707764,0.0014381409,0.020965576,0.013320923,0.0059432983,0.00422287,-0.003047943,-0.0035152435,-0.009963989,-0.0128479,-0.014533997,-0.007423401,0.012771606,0.044128418,-0.000108122826,-0.018615723,0.018539429,0.0033035278,0.009971619,-0.0058631897,-0.010391235,0.030212402,-0.0084991455,-0.018447876,0.0011587143,0.014678955,-0.027374268,-0.01499939,-0.01739502,0.02432251,0.03604126,-0.014457703,-0.019515991,0.010169983,0.011390686,0.018051147,0.031341553,0.003791809,0.0541687,0.026641846,-0.0024337769,-0.020431519,0.0042152405,-0.010856628,-0.024414062,0.012161255,-0.012863159,-0.021591187,0.035003662,0.0024642944,-0.005519867,-0.032470703,-0.016983032,-0.0014181137,-0.011993408,0.029403687,-0.009689331,0.011741638,-0.0317688,-0.0053367615,-0.0002617836,0.0064201355,-0.035705566,-0.02017212,-0.004306793,-0.0127334595,-0.0546875,-0.00020182133,-0.03149414,0.010437012,-0.008026123,-0.002046585,0.0012664795,0.03149414,-0.0014858246,0.0038013458,0.013259888,0.019973755,0.011894226,0.008056641,0.02947998,-0.021438599,-0.019729614,-0.019363403,0.017669678,-0.02217102,0.022918701,-0.0060806274,0.040527344,0.004837036,-0.012481689,0.0013542175,-0.0014925003,-0.015777588,-0.0035057068,-0.010261536,-0.011016846,0.021850586,0.023406982,-0.0023727417,-0.0073394775,0.040527344,-0.02319336,-0.0030288696,0.023101807,0.051116943,0.0037899017,0.045013428,0.0041885376,-0.0093307495,-0.02418518,0.0016355515,-0.027679443,0.008415222,0.018417358,0.0038414001,0.000834465,-0.00066518784,0.0044021606,-0.010391235,0.008888245,0.021652222,0.010810852,-0.008796692,0.030914307,0.0053749084,0.010040283,-0.02670288,-0.015289307,0.008728027,0.027114868,0.011276245,0.0038337708,0.00019061565,0.017105103,-0.0118255615,0.0011720657,0.012290955,-0.02507019,-0.030136108,-0.021133423,-0.04296875,0.008583069,0.020019531,0.016342163,-0.0014123917,0.01676941,-0.011383057,-0.038970947,-0.0084991455,0.022583008,0.009178162,-0.013725281,-0.010002136,0.0104904175,0.0058135986,-0.023880005,0.007030487,-0.03552246,-0.03125,-0.0073776245,-0.023468018,0.012420654,0.0044670105,-0.0146484375,0.011512756,-0.007423401,0.002336502,0.0135269165,0.02532959,0.0045051575,-0.0013275146,0.00340271,0.01737976,-0.009155273,0.006351471,-0.017440796,-0.0046958923,0.028366089,-0.0022335052,0.017349243,-0.0021743774,0.018920898,-0.00920105,-0.012214661,0.025024414,0.0005726814,0.009376526,-0.026535034,0.0022640228,0.00070762634,-0.010307312,0.023895264,-0.020996094,-0.032226562,-0.0021896362,-0.02078247,-0.029953003,-0.00013113022,0.026397705,0.035308838,-0.004600525,0.031204224,-0.021270752,-0.0022010803,0.015182495,-0.003944397,-0.012016296,-0.0008740425,0.054656982,0.00712204,-0.006011963,-0.008079529,0.011520386,-0.025161743,-0.013160706,0.011619568,-0.00021910667,-0.01234436,0.012084961,0.008255005,0.03527832,-0.0055503845,-0.004398346,0.014762878,0.0050468445,0.028335571,0.004234314,0.053955078,-0.011238098,-0.030227661,0.0024356842,0.036834717,-0.02078247,0.00086688995,-0.0055885315,0.004470825,-0.044708252,0.019104004,-0.01361084,0.0284729,-0.027191162,0.007408142,-0.0209198,-0.021942139,-0.02810669,-0.0072784424,-0.0357666,-0.0012111664,0.040893555,0.015274048,0.01361084,-0.00459671,-0.030136108,0.042175293,0.04550171,-0.003610611,-0.029449463,-0.013259888,0.008857727,-0.008041382,0.003873825,0.008323669,-0.030670166,-0.017227173,-0.002254486,-0.017654419,-0.0013551712,-0.009407043,0.0061149597,0.015068054,-0.00944519,0.007499695,0.031402588,0.003522873,-0.0032405853,0.005622864,-0.0030288696,0.049072266,0.032409668,-0.017440796,0.027557373,0.007904053,-0.033813477,0.06304932,-0.012008667,0.019378662,-0.015975952,0.0039405823,-0.037872314,-0.0126571655,-0.007896423,0.001791954],"createdAt":"2026-04-18T19:29:43.357Z","updatedAt":"2026-04-23T04:02:11.973Z","lastSeenAt":"2026-04-23T04:02:11.973Z","tsv":"'/api/v1/apikeys/69':107 '0.02':10,24,94,145 '000':134 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':156 '0x8335':139 '20':133 '2913':140 '300':159 '6':149 'Base network API' 'USDC API payment' 'accept':125 'access':36,116,176 'address':155 'advertis':169 'ai':63 'analysi':67 'analyt':62 'api':4,18,35,58,112,163,184 'api-key-provisioning' 'appear':108 'base':8,22,102,135,142 'broader':47 'call':57 'challeng':120 'classif':70 'confirm':121 'connect':193 'content':199 'convers':87 'credenti':177 'data':61 'decim':150 'descript':211 'detail':210 'doc':183 'document':178,230 'embed':71 'endpoint':6,20,30,59,90,106,117,216,225 'equal':144 'estim':81 'exampl':207 'exchang':76 'extrem':180 'feed':75 'financ':72 'gas':80 'gate':3,17 'generat':88 'geocod':85 'given':146 'infrastructur':83 'key':5,19,113,164 'land':221 'learn':65 'limit':167 'list':223 'live':124 'lowpaymentfee.com':32 'machin':64 'made':153 'mani':224 'micropayment API' 'network':103 'no-rate-limits' 'offer':50 'openapi':203 'page':188,222 'part':44 'particular':215 'pay':9,23,55 'pay-per-cal':54 'pay-per-call API' 'pay-per-request' 'payment':40,131,151,171 'per':13,27,56,95 'platform':48,219 'post':126 'premium':34 'premium API access' 'price':74,92,185 'prompt':195 'protocol':41 'provid':33,227 'provis':114 'quot':79 'rate':77,166 'readm':187 'render':190 'request':14,28,96,127 'request/response':206 'requir':129 'return':217 'schema':204 'second':160 'sentiment':66 'serv':173 'settl':97 'span':60 'spars':181 'specif':105 'substant':198 'summar':69 'technic':229 'text':68 'timeout':161 'token':78 'unit':136 'usdc':12,26,99,138,147 'usdc-base' 'util':84 'valid':86 'varieti':52 'via':37 'wallet':194 'web3':73 'x402':2,16,39,119 'x402 API key' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"49a7a828-664d-4657-8830-17229fdbb9d4","listingId":"6368c2a9-f30b-4fa9-8501-86c413d7e67a","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/apikeys/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:43.357Z"}],"sources":[{"listingId":"6368c2a9-f30b-4fa9-8501-86c413d7e67a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/apikeys/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:43.357Z","lastSeenAt":"2026-04-23T04:02:11.973Z"}],"details":{"listingId":"6368c2a9-f30b-4fa9-8501-86c413d7e67a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/apikeys/69 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/apikeys/69"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/apikeys/69"}],"useCases":["Acquiring API access credentials via a single micropayment","Programmatic pay-per-use API consumption without subscription","Agent-driven API key provisioning on Base network"],"bestFor":["Developers wanting no-signup, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over traditional API key management"],"notFor":["Users needing detailed API documentation or OpenAPI specs before purchasing","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.44Z"},"updatedAt":"2026-04-23T04:02:11.973Z"}}