{"id":"5e409678-7400-4291-a34a-b256884e7c4b","shortId":"mMeJTV","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/transfers/136` 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 listed at the same $0.02/request price point.\n\nThis particular endpoint (`/api/v1/transfers/136`) is labeled \"Premium API Access\" but its actual functionality is not documented beyond that label. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive 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","http-post"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","low payment fee API","crypto API access"],"warnings":["The exact functionality of /api/v1/transfers/136 is undocumented — 'Premium API Access' is the only description available.","All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no substantive content.","No OpenAPI spec, no request/response schema, and no example payloads are available.","The platform appears to be a generic demo or early-stage project; endpoint reliability and data quality are unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/136","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/transfers/136","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 captured) 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 of this specific endpoint is undescribed. The docs/pricing/README pages all returned only 'Connect wallet' with no content.","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":"2026-04-19T14:03:50.061Z","embedding":[-0.02192688,-0.035247803,0.045684814,0.028793335,0.0066947937,-0.021011353,-0.023040771,0.034973145,0.06719971,-0.07562256,0.029708862,-0.029403687,-0.037384033,-0.030014038,-0.021011353,0.006816864,0.0017948151,0.002363205,-0.030227661,0.03475952,0.0287323,-0.018173218,-0.03363037,0.022537231,0.0043411255,-0.025619507,-0.008392334,-0.023040771,-0.015060425,-0.03390503,0.03149414,-0.029022217,-0.007255554,0.011245728,-0.010803223,-0.017196655,0.0031261444,0.038848877,0.019561768,0.00057554245,0.008636475,-0.057434082,-0.0046844482,-0.018005371,-0.06439209,-0.003004074,-0.009483337,-0.031143188,0.0007381439,0.0058517456,-0.023712158,-0.0073432922,-0.02178955,0.014549255,0.011245728,0.019744873,0.0067100525,-0.0030155182,0.0033092499,0.01525116,-0.01802063,-0.061279297,-0.01889038,-0.011306763,0.00969696,0.053894043,-0.018310547,0.045318604,0.010559082,0.06756592,0.030273438,0.05215454,0.028533936,0.014381409,0.0019102097,0.004272461,-0.013763428,0.04660034,-0.007408142,-0.021118164,-0.0074920654,-0.014266968,-0.04901123,0.010864258,-0.016342163,-0.036010742,-0.022521973,0.018066406,-0.004924774,0.019210815,-0.06921387,-0.005870819,-0.0028209686,-0.0013856888,-0.0041770935,-0.0071983337,-0.009429932,0.018569946,-0.008033752,0.015930176,-0.01007843,-0.040100098,0.018798828,0.008758545,0.034606934,0.03543091,0.016067505,0.02168274,0.0090408325,0.0065193176,-0.014198303,0.018035889,-0.0029754639,0.0024909973,0.017501831,-0.0044403076,-0.0049858093,0.012229919,-0.028808594,0.034240723,-0.05859375,0.03555298,0.018112183,-0.003047943,0.0013866425,-0.044311523,-0.00038218498,0.024169922,-0.021331787,-0.011566162,0.031051636,0.0065689087,0.029678345,-0.016952515,-0.028869629,0.017227173,-0.024169922,-0.012245178,-0.05532837,-0.040405273,0.039489746,-0.026031494,0.021362305,0.03857422,-0.095214844,-0.0082092285,-0.033599854,0.020599365,-0.02494812,0.005367279,-0.0033931732,0.025421143,-0.008773804,-0.017608643,-0.020904541,-0.020095825,0.00995636,0.029937744,-0.01940918,0.048187256,-0.02432251,0.01625061,0.017837524,0.0019464493,0.016494751,0.026550293,-0.007762909,-0.0748291,-0.09033203,-0.0034065247,-0.009986877,-0.018005371,-0.03186035,0.013870239,-0.004840851,-0.075683594,-0.019683838,-0.03314209,-0.0072402954,-0.04425049,0.00049877167,-0.03302002,0.025177002,-0.0016517639,-0.06726074,-0.02218628,-0.023849487,0.054656982,0.03555298,0.024307251,0.03390503,-0.013572693,0.055877686,0.0143966675,-0.02281189,-0.020843506,0.024261475,-0.013626099,0.0096588135,-0.015419006,0.018753052,-0.028015137,0.031982422,0.06567383,-0.001619339,-0.026321411,-0.0059814453,-0.061065674,-0.04385376,-0.026885986,0.015563965,0.018920898,-0.0031795502,0.040863037,-0.04815674,-0.031173706,0.01209259,0.019927979,0.020095825,0.06561279,0.008743286,-0.017562866,0.03112793,0.021743774,-0.05355835,0.03616333,0.03640747,0.01108551,-0.032104492,-0.027633667,0.03277588,0.036376953,-0.02217102,0.0061912537,-0.0065689087,0.026535034,-0.011657715,0.002199173,0.0068244934,-0.013458252,-0.024551392,-0.021896362,-0.02079773,0.02734375,0.004447937,-0.026153564,-0.030715942,-0.08868408,0.059020996,0.037139893,0.040008545,-0.0029964447,-0.0041236877,-0.02230835,-0.021026611,-0.060150146,0.06085205,0.08068848,0.0009121895,-0.01638794,0.024368286,-0.014839172,-0.04663086,0.01626587,-0.0071144104,-0.03152466,-0.015899658,0.016616821,-0.045166016,0.011856079,0.017578125,0.023834229,0.05340576,-0.0055274963,-0.056152344,-0.022506714,-0.0046424866,-0.0044403076,-0.026992798,0.0029392242,-0.008918762,0.018325806,0.0073051453,0.005420685,0.0077667236,-0.004398346,0.002380371,0.009346008,0.011116028,-0.020217896,-0.039031982,0.004436493,0.0043258667,-0.052490234,-0.0006752014,-0.003698349,0.06390381,-0.048828125,0.032592773,-0.011619568,0.0037841797,0.054656982,0.003206253,-0.046783447,0.012466431,0.020446777,0.012504578,0.051940918,0.01965332,-0.03390503,-0.014083862,0.080322266,-0.019470215,-0.0067596436,0.010238647,0.025222778,0.036010742,-0.0027770996,-0.05731201,-0.033416748,-0.0048980713,-0.043121338,0.02305603,-0.02861023,0.039611816,-0.010223389,0.006248474,-0.022903442,0.0013694763,-0.02508545,0.006919861,-0.0069007874,0.011375427,-0.018508911,-0.009552002,0.017944336,-0.0031280518,-0.015365601,0.0043258667,0.03918457,0.0284729,0.0030059814,-0.020721436,-0.027740479,-0.002653122,0.0023097992,0.023651123,0.02130127,0.025253296,0.059783936,-0.03793335,0.012329102,0.016220093,0.021606445,0.026504517,-0.011428833,0.0051727295,-0.07086182,-0.05130005,-0.020935059,-0.0435791,0.04067993,0.01348114,-0.0018949509,0.050933838,0.014038086,-0.031921387,-0.03540039,0.017044067,-0.049591064,-0.003736496,0.04852295,-0.02482605,-0.024917603,0.0072669983,-0.003250122,0.008033752,0.036621094,0.013442993,0.036254883,0.07763672,0.049865723,0.0055236816,0.028625488,-0.0067863464,0.027511597,0.004852295,-0.027145386,-0.030075073,-0.015533447,0.037384033,-0.021636963,-0.015045166,-0.06976318,0.039978027,0.04534912,0.09399414,0.02229309,0.0017910004,0.02583313,-0.011772156,0.021850586,-0.03475952,-0.023895264,-0.02519226,-0.044006348,0.020812988,-0.0060920715,-0.0033073425,-0.021362305,0.0413208,-0.0066566467,0.029678345,-0.031021118,0.05429077,-0.0077667236,-0.019134521,0.014480591,0.0053215027,0.046081543,0.0690918,-0.042510986,0.020446777,0.027938843,-0.016159058,0.0035381317,0.0289917,-0.006214142,-0.0030975342,-0.053985596,-0.03060913,-0.015075684,-0.002248764,-0.04586792,0.01234436,0.017990112,0.028656006,0.032470703,-0.004600525,-0.011894226,-0.0060691833,-0.009552002,-0.056030273,0.001083374,-0.03488159,0.0031852722,0.04296875,-0.024124146,-0.010810852,0.00970459,-0.0055732727,-0.009002686,-0.0012626648,0.01977539,-0.0023231506,-0.050933838,0.021987915,0.00655365,0.013511658,0.01423645,0.028274536,0.015213013,0.039398193,0.035888672,0.023757935,-0.016906738,-0.06427002,0.01473999,-0.047027588,-0.0009613037,0.027420044,-0.020965576,-0.0012779236,-0.012039185,-0.030761719,-0.025939941,0.020492554,-0.028884888,0.0004940033,0.020462036,-0.013511658,-0.03137207,-0.053375244,-0.025161743,-0.0071640015,0.06008911,0.022613525,0.024276733,-0.07281494,-0.013557434,0.03253174,0.014076233,0.031585693,-0.01399231,-0.0010519028,-0.011955261,-0.024368286,-0.015319824,-0.023284912,0.024093628,-0.0057296753,-0.0022964478,0.014533997,0.011077881,0.024429321,-0.0037708282,0.016952515,0.032928467,-0.036071777,-0.009025574,-0.0021419525,0.029937744,0.010688782,-0.014678955,-0.056396484,0.039093018,0.013549805,0.038238525,-0.045837402,-0.0090789795,-0.012916565,0.017684937,0.009178162,-0.007183075,-0.0067481995,-0.010177612,-0.04562378,-0.057250977,0.060180664,-0.024902344,0.029937744,0.029144287,0.0040779114,0.01977539,-0.014816284,-0.018005371,0.013725281,-0.020812988,-0.010253906,-0.012565613,-0.02418518,-0.026168823,-0.012611389,-0.016830444,0.022888184,-0.022598267,0.020950317,0.0013999939,-0.028457642,0.017929077,-0.0054473877,-0.008613586,0.015403748,-0.0007042885,0.027297974,0.036102295,0.0119018555,-0.038360596,0.011962891,-0.010192871,0.011329651,-0.0022735596,0.04776001,0.02507019,-0.001537323,0.010116577,-0.011077881,-0.017868042,-0.016311646,-0.007858276,0.013458252,0.013793945,-0.007019043,-0.039642334,0.011657715,0.0063171387,-0.034088135,-0.027664185,0.013763428,0.012763977,-0.028152466,0.028121948,0.03451538,0.048217773,-0.014213562,-0.0049743652,-0.0032463074,0.02267456,0.028884888,0.01499939,-0.015640259,0.019073486,-0.017303467,0.022750854,-0.00819397,-0.008178711,0.027557373,0.006916046,0.024169922,0.025405884,0.0037498474,-0.027191162,-0.04019165,-0.0029907227,-0.0071525574,-0.02532959,0.025299072,0.016662598,0.030532837,-0.025375366,0.015655518,0.009513855,-0.027145386,-0.014678955,-0.021224976,0.04849243,-0.02078247,-0.010253906,0.011711121,0.022903442,0.03277588,-0.059631348,-0.0010604858,-0.0021457672,0.010940552,-0.021865845,-0.04547119,-0.034301758,0.005340576,0.030075073,-0.0001333952,0.02305603,0.036499023,-0.00008392334,0.011077881,0.027374268,-0.0040740967,-0.008987427,-0.024871826,-0.040039062,-0.016204834,-0.010810852,0.0016412735,-0.031097412,0.009994507,0.0016613007,-0.025909424,0.0031051636,-0.013557434,-0.00039553642,-0.012199402,0.0009150505,0.03869629,-0.0044555664,0.018630981,-0.01826477,-0.046325684,0.0077552795,0.0049095154,0.014099121,-0.041931152,0.014961243,-0.018325806,-0.007949829,0.005332947,0.015670776,0.02029419,0.0206604,0.0104522705,0.032562256,-0.042297363,0.039794922,-0.030197144,0.007080078,-0.0069351196,-0.038360596,-0.017486572,-0.019821167,-0.015899658,0.047088623,-0.02355957,-0.006755829,-0.024124146,-0.039245605,-0.0090789795,-0.050567627,0.007171631,0.039978027,0.0357666,-0.024520874,-0.003080368,0.0032997131,0.0029792786,-0.01751709,0.008758545,-0.023910522,0.01928711,0.028167725,-0.0011482239,-0.04067993,-0.030151367,-0.025222778,-0.017730713,-0.044799805,-0.052124023,-0.023147583,-0.00003749132,-0.014678955,-0.006843567,-0.022064209,-0.028381348,0.003129959,-0.043182373,0.0023841858,0.016586304,0.023422241,0.0076026917,-0.029754639,0.0029850006,0.016799927,-0.018417358,0.03857422,0.014045715,-0.005508423,-0.03842163,0.0029144287,0.016342163,0.025894165,-0.0030345917,-0.021148682,-0.0059394836,-0.015487671,-0.06506348,-0.006793976,-0.004360199,-0.014198303,-0.0051879883,-0.0013494492,-0.051116943,-0.0021419525,-0.012992859,0.0018949509,0.02468872,0.006046295,0.01423645,0.0019006729,0.01725769,-0.0047454834,-0.010375977,-0.028793335,0.014404297,0.01008606,-0.0000885129,0.02508545,0.059020996,0.010055542,-0.026382446,-0.00045490265,0.0039520264,0.013549805,-0.029449463,0.0037193298,-0.014076233,0.010169983,-0.0112838745,-0.014839172,-0.035949707,-0.004776001,0.07897949,-0.0068893433,-0.017364502,-0.012512207,-0.020935059,0.017608643,0.02947998,-0.038208008,-0.011314392,-0.01928711,0.01687622,-0.023651123,0.016281128,0.013000488,0.021514893,-0.009094238,-0.05404663,-0.02027893,-0.009101868,-0.011627197,-0.05886841,-0.026290894,-0.066223145,0.004322052,-0.009124756,-0.021820068,0.0022220612,0.015625,-0.021270752,-0.07977295,0.0058403015,0.05807495,0.014457703,0.02709961,-0.013389587,0.020355225,0.028533936,-0.039093018,-0.008476257,0.023254395,-0.02709961,-0.022323608,-0.02645874,0.026321411,-0.013572693,-0.015823364,0.016098022,0.011665344,0.014717102,-0.016830444,0.0028705597,-0.015403748,0.020767212,-0.020385742,0.022521973,-0.010795593,-0.012809753,0.034851074,-0.041809082,0.021820068,0.020889282,-0.009178162,-0.004081726,0.0340271,0.038635254,-0.040802002,-0.013160706,0.015151978,0.015098572,0.028656006,-0.026885986,0.04244995,0.0129852295,-0.017654419,0.020767212,-0.013145447,-0.020523071,-0.011955261,-0.027664185,0.027145386,-0.008651733,0.020217896,-0.02279663,0.0032310486,0.012336731,0.018066406,0.00869751,-0.013069153,-0.010269165,-0.013496399,-0.011329651,0.0048599243,0.006340027,-0.0051841736,0.026992798,0.027526855,0.037200928,0.012931824,-0.027023315,0.004470825,0.03677368,-0.010856628,-0.000049173832,0.0184021,0.004043579,0.020706177,0.017028809,0.015159607,-0.0491333,-0.021331787,-0.0067100525,-0.022827148,0.004760742,-0.0055351257,-0.011276245,-0.014274597,0.010292053,-0.0020599365,-0.025436401,0.005970001,-0.023620605,-0.027816772,-0.005218506,-0.021530151,0.018630981,0.0004146099,0.014572144,0.0034770966,-0.003112793,0.034973145,-0.00415802,-0.015975952,0.02078247,0.029708862,0.018127441,-0.038146973,0.00023567677,-0.016616821,-0.023208618,-0.009864807,-0.03439331,0.00333786,0.04107666,-0.019210815,-0.005680084,0.0032901764,0.024551392,-0.002199173,0.004711151,-0.007881165,0.016906738,-0.006626129,0.036865234,-0.035308838,0.024368286,0.008270264,0.0032577515,-0.012512207,-0.010986328,-0.029373169,0.02218628,0.011703491,-0.017349243,0.050323486,0.012664795,0.02355957,-0.018310547,-0.017288208,0.011016846,-0.024978638,-0.014312744,0.025146484,-0.008071899,-0.002670288,0.0014944077,-0.024871826,0.04333496,-0.03414917,0.015083313,0.005077362,0.007827759,-0.011642456,-0.024383545,-0.007873535,-0.0090408325,-0.018173218,0.01524353,0.0018310547,0.04788208,0.022994995,0.03060913,0.048461914,0.017349243,-0.006965637,-0.035186768,-0.022949219,0.017349243,-0.023025513,0.020629883,-0.014831543,0.05709839,0.035949707,0.00881958,0.03842163,0.026123047,0.031799316,0.014152527,0.009002686,-0.021194458,0.013420105,0.0028648376,0.031555176,-0.005168915,0.03479004,-0.027862549,0.02394104,0.0067863464,0.023483276,-0.04257202,0.037628174,0.072021484,0.016464233,-0.012428284,0.043884277,-0.011016846,-0.0065689087,-0.010536194,-0.025619507,0.051239014,0.005924225,0.04949951,0.046569824,0.014190674,-0.0007414818,0.028244019,-0.02418518,-0.024215698,0.062347412,0.027755737,-0.017822266,-0.013511658,-0.0019664764,0.0178833,-0.043945312,-0.031341553,0.01928711,-0.012992859,0.014968872,-0.004043579,-0.016464233,-0.009803772,0.018081665,0.023757935,0.013389587,-0.016464233,0.029922485,0.03491211,-0.00016140938,0.022872925,-0.0056877136,0.023132324,-0.02822876,-0.026626587,0.02116394,0.024917603,-0.013587952,-0.015113831,0.030456543,0.0043563843,0.041137695,0.050201416,-0.029022217,0.008300781,0.037475586,0.008934021,-0.0064315796,0.052947998,0.044769287,0.0184021,0.0385437,0.020401001,0.02709961,-0.03765869,0.021072388,-0.0012331009,0.0027370453,-0.004421234,-0.0074157715,0.0054130554,-0.017196655,0.013046265,0.009506226,-0.009346008,0.033203125,0.02999878,-0.0028572083,-0.0036392212,-0.0068511963,0.014587402,-0.019515991,0.0013532639,0.0034160614,-0.019836426,0.043121338,0.0034484863,0.03277588,-0.011528015,0.015136719,0.0030956268,-0.018875122,0.0012407303,0.027252197,-0.02909851,0.0046424866,-0.001121521,0.008987427,-0.05368042,0.013702393,0.028503418,-0.024047852,0.032318115,0.0008587837,-0.0046463013,-0.008079529,0.031097412,0.012237549,-0.006664276,-0.015319824,-0.023498535,0.03439331,0.049072266,-0.00015699863,0.0057907104,-0.02658081,-0.002319336,0.010047913,-0.0050239563,-0.00283432,-0.012504578,-0.021835327,-0.031173706,0.025665283,0.042266846,0.02519226,0.055419922,-0.030807495,-0.008628845,-0.0029411316,0.043304443,0.0020484924,-0.010948181,-0.004142761,0.016967773,-0.019195557,0.047912598,0.029220581,0.012786865,0.032196045,-0.0062446594,-0.020019531,0.008155823,-0.00831604,0.017211914,-0.01737976,0.0050735474,-0.0026721954,0.026885986,-0.013877869,-0.03616333,0.01675415,-0.011787415,-0.019088745,-0.010505676,0.0154418945,0.013633728,0.025222778,0.031311035,0.020507812,-0.014480591,0.061950684,-0.010612488,0.04647827,0.0073509216,-0.018341064,0.048614502,0.01109314,0.025787354,0.019851685,0.019302368,-0.03338623,0.026016235,0.0335083,0.016952515,0.01423645,0.011398315,-0.009544373,0.032562256,0.00086832047,0.027526855,-0.009002686,0.00040459633,0.015396118,-0.002653122,-0.0068359375,-0.0077819824,-0.014923096,0.005630493,0.055877686,-0.031982422,-0.012184143,-0.022415161,-0.009132385,0.01852417,-0.023345947,0.008972168,-0.0055770874,-0.018814087,0.017074585,-0.01625061,-0.03149414,0.0031700134,0.022644043,-0.040374756,-0.020980835,-0.002210617,0.022994995,-0.025878906,0.023620605,0.02355957,0.0029087067,0.0013093948,0.040496826,-0.0025138855,0.02722168,-0.012367249,0.03540039,0.03265381,0.000039815903,-0.025970459,-0.0020389557,0.006729126,-0.021270752,0.009269714,0.041625977,-0.015365601,0.002281189,-0.01071167,-0.0021018982,-0.007621765,0.0046539307,-0.013473511,0.0093307495,-0.02192688,-0.00762558,-0.0036087036,0.012260437,0.0027942657,-0.005279541,-0.0077552795,-0.015991211,0.009605408,0.030349731,0.011741638,-0.034729004,-0.013931274,0.007041931,0.01524353,-0.023147583,-0.0116119385,-0.0034694672,-0.03591919,0.013633728,0.0017318726,0.019851685,0.01687622,-0.025665283,0.006046295,0.029144287,0.020111084,0.0262146,0.0048103333,0.0058403015,0.021118164,-0.0014181137,-0.009742737,0.0011405945,-0.009925842,0.014076233,0.028320312,-0.008956909,-0.024002075,0.025970459,-0.004463196,0.016235352,-0.000121593475,-0.019805908,0.013404846,-0.009101868,0.005458832,0.0017337799,0.011741638,-0.0107421875,-0.009590149,-0.0119018555,0.032470703,0.053710938,-0.020095825,-0.0006260872,0.022781372,0.01965332,0.017837524,0.04067993,0.0066947937,0.044799805,0.023742676,-0.019866943,-0.02571106,0.034179688,-0.0154953,-0.02796936,0.015602112,-0.005252838,-0.016921997,0.021224976,0.015731812,-0.002281189,-0.026351929,-0.019104004,-0.015266418,-0.007965088,0.013587952,-0.024642944,0.008743286,-0.020217896,-0.012840271,0.01361084,-0.030838013,-0.04660034,-0.012062073,-0.0010137558,-0.011627197,-0.053619385,0.01210022,-0.030380249,0.0035476685,-0.03665161,-0.0041046143,-0.008338928,0.02243042,-0.0211792,-0.0045700073,0.010734558,0.026687622,0.015098572,0.008354187,0.024230957,-0.028793335,-0.033477783,-0.023757935,0.009796143,-0.0090789795,0.015205383,0.012916565,0.026855469,0.024337769,-0.009086609,-0.008956909,-0.006412506,-0.009567261,-0.012504578,-0.014793396,-0.02508545,0.027633667,0.02130127,-0.016952515,-0.009162903,0.048034668,-0.01776123,-0.017059326,0.036346436,0.04586792,0.0066452026,0.03564453,-0.017501831,-0.0057296753,-0.015419006,-0.004875183,-0.013290405,0.0052757263,0.004108429,0.0023155212,-0.017471313,-0.0020141602,0.019592285,-0.019454956,-0.005458832,0.027679443,0.000095546246,-0.01361084,0.035736084,0.014945984,0.0033779144,-0.019927979,-0.01171875,0.03086853,0.046447754,0.017593384,0.007549286,-0.0031871796,0.0016918182,-0.014381409,0.006877899,0.016693115,-0.026687622,-0.04147339,-0.026168823,-0.024520874,0.01777649,-0.0042266846,0.013175964,-0.009727478,0.021942139,-0.012992859,-0.014663696,-0.027786255,0.030044556,0.0064926147,-0.009483337,-0.0063285828,0.008148193,0.010643005,-0.033325195,0.00009012222,-0.04751587,-0.031402588,-0.007896423,-0.02180481,0.031829834,0.0132751465,0.001036644,-0.0128479,-0.0076446533,-0.0055885315,0.0044059753,0.030975342,-0.020736694,-0.007209778,0.034362793,0.012031555,-0.021865845,0.024490356,-0.01966858,-0.0037555695,0.010650635,-0.00033283234,0.010025024,-0.025039673,0.034179688,-0.01335144,-0.003917694,0.027191162,-0.010246277,0.0062713623,-0.034240723,0.014274597,0.0009083748,0.0010490417,0.034851074,-0.023040771,-0.022247314,-0.0002515316,-0.017044067,-0.027557373,0.0025024414,0.016586304,0.03375244,-0.0075798035,0.046691895,-0.019210815,-0.006401062,0.022506714,0.008132935,-0.017837524,0.007320404,0.033050537,0.00207901,0.004749298,-0.007850647,-0.015472412,-0.030303955,-0.0012254715,0.008888245,-0.0036201477,-0.012748718,0.026397705,0.01789856,0.039916992,-0.0002875328,0.02798462,0.0076065063,0.01210022,0.025665283,0.011177063,0.06097412,0.0011701584,-0.010932922,0.003074646,0.0053253174,-0.02381897,0.0021514893,-0.007701874,0.005935669,-0.036743164,0.016067505,-0.007827759,0.021713257,-0.022033691,0.01322937,-0.027297974,-0.01612854,-0.03781128,-0.015037537,-0.02911377,0.00983429,0.027038574,-0.004337311,0.027145386,0.007156372,-0.030715942,0.014518738,0.045440674,-0.0079193115,-0.033416748,-0.0047340393,0.022827148,0.005264282,0.009529114,0.009124756,-0.021697998,-0.014907837,0.0041007996,-0.013191223,0.00009602308,0.00009572506,0.0146484375,0.011184692,-0.0038967133,-0.008758545,0.032714844,-0.007850647,-0.006626129,0.013534546,0.009132385,0.040618896,0.034820557,-0.010719299,0.016586304,0.024047852,-0.036895752,0.0657959,0.0064430237,0.024520874,-0.023361206,0.007396698,-0.034057617,-0.02268982,-0.010177612,0.017913818],"createdAt":"2026-04-18T19:27:34.366Z","updatedAt":"2026-04-23T02:01:53.035Z","lastSeenAt":"2026-04-23T02:01:53.035Z","tsv":"'/api/v1/transfers/136':56,162 '/request':13,28,156 '0.02':12,27,78,155 '000':72 '20':71 '402':66 'Base network API' 'USDC pay-per-call' 'accept':46 'access':62,92,167 'across':112 'actual':170 'advertis':83 'ai':122 'analysi':126 'analyt':116 'api':5,20,38,61,85,166 'attach':95 'base':8,23,51,73 'beyond':175 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67 'classif':129 'connect':188 'content':194 'convers':146 'crypto API access' 'data':115,119,203 'doc':179 'document':174,197 'embed':130 'endpoint':55,111,149,161,207 'estim':140 'exact':202 'exampl':199 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':171 'gas':139 'generat':147 'geocod':144 'header':100 'http-post' 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'key':86 'label':164,177 'learn':124 'limit':89 'list':58,151 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'metric':117 'micropayment API' 'network':9,24,52 'no-api-key' 'offer':110 'page':183 'particular':160 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,99,105 'per':3,18,36,79 'platform':6,21,39,82,109 'point':158 'premium':60,165 'price':133,157,180 'prompt':190 'proof':106 'protocol':44 'quot':138 'rate':88,136 'readm':182 'remain':208 'report':118 'request':37,68 'respons':200 'return':64,185,204 'sentiment':125 'simpli':94 'specif':54 'substant':193 'summar':128 'text':127 'token':137 'unclear':209 'unit':74 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':189 'web3':132 'without':195 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 API' 'x402-payment'","prices":[{"id":"b69aae66-2cc9-4661-a70a-b27e0a8622ba","listingId":"5e409678-7400-4291-a34a-b256884e7c4b","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/transfers/136","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:34.366Z"}],"sources":[{"listingId":"5e409678-7400-4291-a34a-b256884e7c4b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/136","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:34.366Z","lastSeenAt":"2026-04-23T02:01:53.035Z"}],"details":{"listingId":"5e409678-7400-4291-a34a-b256884e7c4b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transfers/136 \\\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/transfers/136"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transfers/136"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium API data with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access","Testing x402 protocol integrations on Base network"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet","High-volume consumers who would benefit from bulk pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:34.753Z"},"updatedAt":"2026-04-23T02:01:53.035Z"}}