{"id":"df26df1d-7568-417e-b3dd-7703f489cb47","shortId":"vy7Ut5","kind":"x402","title":"x402-gated config endpoint on a multi-API platform charging $0.02/request via USDC on Base.","tagline":"x402-gated config endpoint on a multi-API platform charging $0.02/request via USDC on Base.","description":"The `/api/v1/config` endpoint is part of lowpaymentfee.com, a platform that exposes a broad catalog of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Each request is gated by an x402 payment challenge requiring USDC on the Base network, with no API keys, no rate limits, and a flat per-request fee.\n\nThe specific `/api/v1/config` endpoint is labeled \"Premium API Access\" in the x402 challenge. Its exact response payload is undocumented — the crawled docs pages returned only a wallet-connect prompt with no further content. Based on its path (`/config`), it likely returns platform or account configuration metadata, but this is speculative. The x402 challenge confirms the endpoint is live, accepts POST requests, requires up to 20,000 units of USDC (6 decimals → $0.02), and pays to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. No OpenAPI schema, request/response examples, or detailed documentation were found for any endpoint during the crawl.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-pricing","config-endpoint","no-api-key","no-rate-limit"],"categories":["infrastructure","misc"],"synonyms":["lowpaymentfee","low payment fee API","x402 config","premium API access","USDC gated API","pay-per-request API","Base network API"],"warnings":["No documentation found — all doc pages returned only a wallet-connect prompt with no content.","The exact purpose and response schema of /api/v1/config is unknown; 'Premium API Access' is the only description.","No OpenAPI or output schema available for any endpoint on this platform.","The platform lists many endpoints but none appear to have public documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/config","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/config","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 a valid 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages all returned only a wallet-connect stub. The purpose of the /config endpoint is unclear beyond its label.","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":"2026-04-18T19:45:07.922Z","embedding":[-0.00019276142,-0.030197144,0.052886963,-0.011299133,0.0029029846,-0.014434814,-0.025527954,0.02897644,0.04714966,-0.04055786,0.030044556,-0.03765869,-0.012832642,-0.012565613,-0.0006904602,0.0048332214,-0.024642944,0.032440186,-0.045562744,0.040924072,0.03463745,-0.0121536255,-0.030670166,0.041656494,-0.01259613,-0.01058197,0.027526855,-0.01737976,-0.027755737,-0.028411865,0.024093628,-0.03466797,-0.023971558,-0.0051956177,-0.0024261475,0.02418518,0.0034275055,0.029586792,0.039642334,0.008583069,-0.015571594,-0.04321289,-0.012489319,0.0047340393,-0.029571533,-0.006175995,-0.003955841,0.0029144287,-0.021560669,-0.008003235,-0.03225708,0.00724411,0.000957489,0.020523071,0.0037021637,-0.000035762787,-0.013725281,-0.0024757385,0.005760193,0.015167236,0.008544922,-0.0871582,0.00054979324,0.0013856888,0.026168823,0.04562378,0.0017662048,0.046173096,-0.00017726421,0.062438965,0.038513184,0.04321289,0.03137207,-0.02658081,0.036468506,-0.021697998,-0.0017776489,0.08459473,-0.026657104,-0.03967285,-0.029647827,-0.013053894,-0.04888916,-0.03225708,-0.0037937164,-0.053100586,-0.026931763,0.025268555,-0.018096924,0.040405273,-0.052337646,-0.018478394,-0.013694763,0.009567261,-0.011299133,-0.016525269,0.013145447,-0.0031223297,0.0008378029,0.015136719,0.0096206665,-0.048217773,0.019805908,0.043914795,0.06317139,0.025436401,0.0090789795,0.036712646,0.012138367,-0.03527832,-0.024414062,0.0061912537,-0.017852783,0.0007276535,-0.007472992,0.009605408,-0.021438599,0.03491211,-0.024139404,0.014709473,-0.029022217,0.040527344,0.027572632,-0.0063209534,-0.004901886,-0.032104492,-0.036956787,-0.005710602,-0.042388916,-0.02558899,0.01612854,0.018157959,0.02619934,-0.037109375,-0.034973145,0.013458252,-0.038970947,-0.025177002,-0.033813477,-0.022888184,0.007270813,-0.033233643,0.012519836,0.02558899,-0.09320068,0.004169464,-0.029541016,0.004272461,-0.040527344,0.0025138855,-0.007282257,0.027297974,-0.004787445,-0.027420044,0.00907135,-0.05407715,-0.035339355,0.035614014,0.010696411,0.013809204,-0.010734558,0.03665161,0.009887695,-0.006385803,0.040008545,0.025939941,0.010925293,-0.062683105,-0.0826416,-0.03805542,-0.0056495667,0.0087890625,-0.040649414,0.00060224533,0.0087890625,-0.071777344,-0.030303955,0.0014333725,-0.00023829937,-0.022735596,-0.010215759,-0.027450562,-0.020889282,0.0084991455,-0.05569458,-0.024627686,-0.04071045,0.04824829,0.04840088,0.02027893,0.0014123917,-0.013496399,0.050567627,0.008338928,-0.018341064,-0.03414917,0.030227661,-0.033172607,0.047454834,-0.0033798218,0.026885986,-0.031555176,0.064208984,0.05355835,-0.0066375732,-0.0018920898,0.0062713623,-0.018554688,-0.046539307,-0.02394104,0.0035972595,-0.022460938,-0.0073013306,0.03616333,-0.035003662,-0.04055786,0.004333496,-0.003583908,0.014549255,0.03439331,0.0057907104,-0.0038452148,0.013801575,0.019180298,-0.034942627,0.05407715,0.010047913,0.025970459,-0.0072898865,-0.022598267,0.016067505,0.034576416,-0.063964844,-0.005302429,-0.005859375,0.01285553,-0.005264282,-0.008834839,0.03616333,0.0007009506,-0.045532227,-0.042510986,-0.017166138,0.022628784,0.012229919,-0.02168274,-0.04446411,-0.06781006,0.039215088,0.06719971,0.023849487,0.017700195,0.013961792,-0.044647217,-0.016204834,-0.07647705,0.040252686,0.038146973,-0.012832642,-0.033111572,0.04055786,-0.016357422,-0.02949524,-0.00333786,0.00036549568,-0.000100791454,-0.029663086,0.022155762,-0.06933594,-0.026016235,0.028335571,0.023468018,0.039367676,-0.0070724487,-0.036499023,-0.024932861,0.00071907043,0.02458191,-0.03491211,0.022445679,0.0020561218,0.002817154,0.036102295,0.009109497,0.029083252,-0.0026474,0.007827759,-0.0178833,-0.0029449463,-0.038970947,-0.020339966,0.021606445,0.0068740845,-0.061828613,0.028823853,0.022903442,0.030044556,-0.024124146,0.04837036,0.0029239655,0.047851562,0.031219482,-0.0132751465,-0.057495117,0.0062408447,0.034454346,0.060058594,0.051330566,0.018356323,0.014221191,-0.0060539246,0.053100586,0.00844574,-0.0052452087,0.0046691895,0.03237915,0.023483276,-0.009346008,-0.05795288,-0.03262329,-0.007980347,-0.023986816,0.016189575,-0.024841309,0.03955078,0.005870819,0.015022278,-0.012809753,0.01259613,-0.034698486,-0.0026683807,-0.011436462,-0.001914978,-0.0068473816,-0.02293396,-0.0070724487,0.0132369995,0.003019333,0.0032215118,0.03137207,0.01146698,-0.01461792,-0.04626465,-0.044921875,-0.010131836,0.01424408,0.0008673668,0.011680603,0.029205322,0.03277588,-0.03277588,-0.0071487427,-0.016021729,0.005142212,0.02017212,-0.0084991455,-0.011894226,-0.029663086,-0.07885742,-0.011749268,-0.028244019,0.013801575,0.030761719,0.020233154,0.0423584,-0.0059280396,-0.015823364,-0.026809692,0.03237915,-0.057434082,0.023986816,0.035491943,-0.029174805,-0.043884277,0.0062561035,-0.008842468,0.005924225,-0.005844116,0.015899658,-0.0019989014,0.085510254,0.015472412,0.020355225,0.014549255,0.002752304,0.023620605,-0.020324707,-0.023406982,-0.035064697,-0.045532227,0.022888184,-0.049804688,-0.028549194,-0.07910156,0.042236328,0.024139404,0.0793457,-0.0124053955,0.03604126,0.021469116,0.0028629303,0.009544373,-0.024780273,-0.016235352,-0.03930664,-0.038848877,0.029388428,-0.004753113,-0.0025138855,-0.03842163,0.05871582,0.010719299,0.00055360794,-0.024459839,0.037902832,-0.00806427,-0.0024986267,0.010986328,0.0491333,0.047973633,0.04397583,-0.022521973,0.0058784485,0.008590698,-0.009376526,-0.0075263977,0.008201599,-0.013259888,-0.025268555,-0.056518555,-0.028518677,-0.008613586,-0.017929077,-0.034179688,0.012779236,0.0041656494,0.013504028,-0.00472641,0.008277893,-0.03265381,-0.012573242,-0.003490448,-0.033569336,-0.025894165,-0.05505371,0.024612427,0.005908966,-0.023788452,-0.0071868896,-0.0051879883,0.011390686,-0.0050582886,0.006904602,0.0007543564,0.005241394,-0.030197144,0.02746582,0.0073394775,0.0413208,0.040740967,0.029022217,0.041809082,0.03074646,0.0070343018,0.009902954,-0.010108948,-0.060455322,0.0030231476,-0.042053223,-0.011520386,0.007434845,0.0057296753,0.016815186,-0.019973755,-0.022125244,-0.017227173,0.01260376,-0.021469116,0.027145386,0.041534424,-0.015640259,-0.0030269623,-0.057861328,-0.021316528,-0.0015335083,0.08190918,-0.0014104843,0.0015163422,-0.047180176,-0.01876831,0.0152282715,0.009773254,0.026733398,-0.014373779,-0.010215759,-0.03050232,-0.027648926,-0.041900635,-0.03665161,0.029129028,-0.011604309,0.0074424744,0.014587402,-0.01966858,0.024765015,0.0067100525,0.022079468,0.007293701,-0.021148682,-0.012527466,-0.025253296,0.014823914,0.012390137,-0.0027008057,-0.045562744,0.019729614,0.0041236877,0.022659302,-0.02571106,0.004486084,-0.007583618,0.004928589,0.0067100525,-0.0018043518,0.0020160675,0.039367676,-0.026062012,-0.11529541,0.008964539,-0.04385376,0.018157959,0.0046195984,0.025115967,0.046325684,-0.028182983,0.012283325,0.030273438,-0.03353882,-0.0064353943,-0.01737976,-0.046295166,-0.03555298,-0.0005393028,0.010002136,0.0057754517,-0.007335663,-0.000039935112,-0.0020256042,-0.006286621,0.037017822,0.02255249,-0.0026340485,0.004234314,0.0059661865,0.03866577,0.030044556,0.0027103424,-0.034057617,0.019180298,0.011192322,-0.00969696,-0.018432617,0.040924072,0.025115967,0.00081014633,-0.008964539,0.0045814514,0.024017334,-0.028701782,-0.03286743,0.010375977,0.0178833,-0.0014896393,-0.014823914,0.020767212,0.009941101,-0.02456665,-0.032562256,0.033996582,0.027572632,-0.024307251,0.012756348,0.02128601,0.038085938,-0.011482239,-0.0020618439,0.0063552856,0.027923584,0.033203125,0.017486572,-0.009429932,0.022064209,-0.013389587,0.020553589,-0.00818634,-0.0053138733,0.028015137,0.0055503845,0.007003784,0.023284912,0.0079193115,-0.024871826,-0.016616821,0.0057029724,-0.017044067,-0.02659607,0.024124146,0.009109497,0.009063721,-0.009742737,0.022155762,-0.004055023,-0.036499023,-0.01348114,-0.0032672882,0.03326416,-0.0034561157,-0.022247314,0.04751587,-0.000104904175,0.032348633,-0.041870117,-0.008300781,-0.009407043,0.013137817,-0.021499634,-0.060150146,-0.028442383,-0.010673523,0.037109375,0.04849243,0.01612854,0.046966553,0.014770508,0.0025520325,0.012794495,0.001745224,0.009269714,-0.006767273,-0.06225586,0.0121154785,0.006690979,-0.006866455,-0.039642334,0.0025100708,-0.044189453,-0.02519226,0.00844574,0.007801056,0.019989014,-0.0025577545,-0.01574707,0.04257202,0.024215698,0.012489319,-0.0033283234,-0.03665161,0.008407593,-0.022232056,0.03945923,-0.036895752,0.026138306,-0.021148682,0.0038223267,-0.032165527,0.035491943,-0.002998352,0.0038528442,0.007335663,0.035827637,-0.028549194,0.035217285,-0.0033798218,0.023391724,0.017929077,-0.035003662,-0.011703491,-0.03125,-0.008811951,0.041503906,-0.025817871,-0.005050659,-0.016677856,-0.05432129,0.011116028,-0.05316162,0.012237549,0.025802612,0.0309906,-0.035003662,0.00056505203,0.016952515,-0.0043754578,0.008583069,0.006591797,-0.015380859,0.0236969,0.03010559,0.00970459,-0.003490448,-0.011642456,0.000009298325,0.0053100586,-0.044799805,-0.053100586,-0.012557983,0.016448975,-0.019683838,-0.0054016113,-0.012748718,-0.039276123,0.0002219677,-0.047790527,-0.0009937286,0.010307312,0.02532959,-0.00422287,-0.03564453,-0.0072898865,0.0047340393,-0.025115967,0.021057129,-0.015457153,-0.0017824173,-0.04083252,0.0034561157,0.033599854,0.0070724487,-0.015945435,-0.030258179,-0.0054969788,-0.030822754,-0.049072266,0.02305603,-0.0034980774,0.017913818,0.010406494,-0.022781372,-0.0446167,-0.017913818,-0.023406982,0.0042037964,-0.012969971,0.01486969,0.008102417,0.008178711,0.001042366,0.0076904297,0.01222229,-0.028747559,-0.007045746,0.009513855,0.0043144226,0.015167236,0.024795532,0.018554688,-0.024887085,0.01966858,-0.0023117065,0.009376526,-0.023529053,0.020965576,0.004383087,0.0052108765,-0.01348114,-0.017623901,-0.015449524,-0.0030536652,0.055664062,0.0064468384,0.0317688,-0.015777588,-0.025878906,0.009643555,0.067871094,-0.04562378,-0.020385742,-0.017578125,0.03338623,-0.006668091,0.030685425,0.00041890144,0.0068855286,-0.03842163,-0.06188965,-0.0049743652,0.028396606,0.014549255,-0.061157227,-0.014511108,-0.06225586,0.007217407,-0.026657104,-0.013519287,0.01423645,0.010986328,-0.026016235,-0.08062744,0.013877869,0.043518066,0.020721436,0.016952515,-0.015151978,0.012908936,0.021942139,-0.018325806,-0.0067481995,0.0102005005,-0.0057144165,-0.03237915,-0.014846802,0.012420654,-0.011375427,-0.028015137,0.032470703,0.007347107,0.013061523,-0.011650085,0.0103302,-0.005836487,0.027770996,-0.0036029816,0.01965332,-0.005004883,-0.019119263,0.029876709,-0.039245605,0.018249512,-0.008125305,0.0019197464,-0.029968262,0.02357483,0.032714844,-0.044769287,-0.0039367676,0.052886963,0.02230835,0.030197144,-0.036376953,0.050323486,0.013885498,-0.017166138,-0.00008624792,0.0007972717,-0.015342712,-0.041656494,-0.028945923,0.032592773,0.022033691,0.025024414,-0.013763428,-0.000028789043,0.03942871,-0.00034570694,-0.016677856,-0.005382538,0.0036125183,-0.018569946,0.007396698,0.027526855,-0.0045394897,-0.00045394897,0.009689331,0.021713257,0.022415161,-0.007007599,-0.002380371,-0.00818634,0.007385254,-0.002275467,-0.0056419373,-0.0056991577,0.021865845,0.02168274,0.027420044,0.029876709,-0.02255249,0.003753662,-0.0041503906,0.01838684,0.037109375,-0.008766174,-0.00084400177,0.011016846,-0.0008215904,0.003271103,-0.039276123,-0.00217247,-0.038391113,-0.01914978,-0.009613037,-0.024795532,0.02973938,0.026290894,0.004714966,-0.010803223,-0.006252289,0.036254883,-0.0072135925,-0.013710022,0.046966553,0.03857422,0.0256958,-0.011459351,-0.011367798,-0.014945984,0.0052490234,0.0071754456,-0.03213501,0.038970947,0.05493164,0.004169464,0.012535095,0.0016870499,0.0184021,0.0010108948,0.002193451,-0.0017538071,-0.019958496,-0.026046753,0.03189087,-0.06921387,0.015640259,0.030944824,-0.006626129,-0.026473999,-0.019195557,-0.03616333,0.01737976,-0.01625061,0.0022144318,0.046447754,0.004501343,0.00983429,-0.009353638,-0.0059394836,0.008148193,-0.019744873,0.0015983582,0.037261963,-0.017532349,-0.0042266846,0.014862061,-0.025436401,0.020462036,-0.03378296,0.0069007874,0.035247803,-0.005962372,-0.03149414,-0.03866577,0.0061950684,-0.000702858,-0.0034694672,-0.014564514,0.014984131,0.0154953,0.024017334,0.015205383,0.0070610046,0.01058197,0.018829346,-0.04321289,-0.02293396,-0.027877808,-0.0053596497,0.031021118,-0.018341064,0.024261475,0.0050697327,0.00044083595,0.025665283,0.067871094,0.047973633,0.0062713623,0.028747559,-0.01361084,0.003868103,-0.006088257,0.021636963,0.0124435425,0.04748535,-0.006134033,0.029464722,0.015609741,0.03451538,-0.012359619,0.022567749,0.057281494,0.022628784,-0.012413025,0.024856567,-0.019592285,-0.031402588,-0.021713257,-0.02154541,0.062683105,-0.019577026,0.04373169,0.005458832,0.010032654,-0.03668213,0.0047683716,-0.012313843,-0.05697632,0.03314209,0.024795532,-0.0082473755,-0.0017728806,0.0053596497,-0.016708374,-0.050201416,-0.04815674,0.01612854,-0.023422241,0.016204834,0.001739502,0.0020542145,-0.015823364,0.015914917,-0.03161621,0.009048462,0.0024986267,0.023239136,0.025405884,0.013053894,0.03213501,-0.0046195984,0.027297974,-0.018356323,0.00027108192,-0.0002092123,0.030075073,0.007858276,-0.0046958923,0.018234253,0.01285553,0.04562378,0.018310547,-0.024017334,-0.025604248,0.021697998,0.009429932,-0.02532959,0.036499023,0.014579773,-0.0048713684,0.0069389343,0.04208374,0.018218994,-0.028244019,0.0026168823,0.010421753,0.016677856,0.018615723,-0.013633728,0.0051651,-0.0007677078,-0.0032176971,0.027496338,0.0058555603,0.0069389343,0.030227661,-0.010719299,-0.004951477,-0.0075263977,0.0058631897,-0.014450073,-0.00088071823,0.0070724487,-0.01574707,0.023010254,0.016662598,0.015487671,-0.02128601,0.01586914,-0.000705719,-0.014259338,0.00982666,0.023727417,-0.055511475,-0.015975952,0.0036125183,0.012008667,-0.04650879,-0.012664795,0.0067863464,-0.00315094,0.014053345,0.02128601,-0.022598267,-0.003982544,0.036895752,0.02923584,0.00020503998,-0.018661499,-0.00617218,0.02746582,0.026351929,-0.023147583,0.002664566,-0.026992798,0.008224487,0.017715454,0.0013170242,-0.00054979324,0.0053482056,-0.0025100708,0.0010719299,0.019180298,0.039978027,0.030899048,0.032043457,0.0027103424,-0.0045700073,-0.013923645,0.036102295,-0.012878418,0.00919342,-0.001414299,0.018630981,0.0020942688,0.014579773,0.025115967,0.007041931,0.030273438,-0.017303467,-0.017913818,0.023101807,-0.0107421875,0.035247803,-0.011199951,0.027191162,-0.023391724,0.0054092407,-0.029647827,-0.021636963,-0.008468628,-0.018035889,0.017990112,-0.027160645,0.014785767,0.006996155,0.02722168,0.040496826,0.023635864,-0.007358551,0.062561035,-0.0055160522,0.03189087,-0.003932953,0.012184143,0.056884766,0.0340271,0.035186768,0.0029258728,0.0074157715,-0.02468872,0.029510498,0.03677368,0.013519287,0.010566711,0.0036888123,-0.028701782,0.016403198,-0.002878189,0.018005371,0.0023899078,-0.025039673,0.033355713,-0.017700195,-0.014083862,0.0072746277,-0.02355957,0.013031006,0.03643799,-0.01727295,-0.024536133,-0.0049705505,-0.02456665,0.04840088,0.022644043,-0.00089740753,0.004257202,-0.013122559,0.018051147,-0.006729126,-0.020065308,0.0068855286,0.024795532,-0.057800293,-0.028411865,0.012367249,0.020309448,-0.014678955,0.032409668,0.03302002,0.009918213,0.0032176971,0.04727173,-0.01159668,0.04598999,-0.010658264,0.029571533,0.04711914,0.018722534,-0.025741577,0.002084732,0.013595581,-0.0085372925,0.006500244,0.019546509,-0.0003476143,0.009742737,0.0064353943,0.0055122375,-0.008895874,0.005836487,-0.012588501,-0.00016629696,-0.009292603,0.0074424744,-0.006790161,0.009170532,0.026016235,0.002313614,0.016143799,-0.022018433,0.00868988,0.027450562,0.00793457,-0.022827148,0.014129639,0.020843506,-0.00068855286,-0.042541504,-0.00920105,-0.00011062622,-0.0501709,0.027954102,0.035339355,0.002193451,0.00724411,-0.00793457,-0.006275177,0.03665161,0.011009216,0.014511108,0.00957489,-0.005558014,0.0105896,-0.025619507,-0.00028252602,-0.008804321,0.010757446,-0.009994507,0.022064209,0.010406494,-0.022720337,-0.009124756,-0.001627922,-0.018325806,0.004486084,-0.0023117065,0.046936035,-0.010879517,-0.01058197,0.01058197,0.0020198822,-0.027648926,-0.035461426,-0.035247803,0.03164673,0.050689697,-0.012039185,-0.0017757416,0.0047035217,0.022857666,0.035064697,0.013366699,-0.002040863,0.04562378,0.006298065,-0.0021400452,-0.029205322,0.013137817,-0.0109939575,-0.036010742,0.04071045,-0.02784729,-0.029052734,0.014312744,-0.0030269623,-0.008453369,-0.03164673,-0.021438599,0.0040359497,-0.015380859,0.0067329407,-0.020553589,0.010475159,-0.02923584,0.0068244934,0.0038928986,-0.0027980804,-0.0055770874,-0.045715332,-0.001953125,-0.021759033,-0.062194824,-0.006713867,-0.014511108,0.006462097,-0.015670776,-0.0018634796,-0.0059432983,0.022644043,0.00095176697,0.015525818,0.009124756,0.041290283,-0.007217407,0.00009852648,0.009666443,-0.0107040405,-0.0005865097,-0.024047852,0.0014228821,-0.028640747,0.000934124,-0.0042152405,0.034851074,0.0057029724,-0.023223877,0.00472641,-0.0036029816,-0.02658081,-0.00920105,-0.035003662,-0.020431519,-0.0013389587,0.02331543,-0.0031337738,-0.014259338,0.04510498,-0.018371582,-0.031311035,-0.00642395,0.049957275,0.028259277,0.010765076,-0.014823914,0.0024089813,-0.03152466,-0.0032539368,-0.019744873,0.000010848045,0.011383057,0.014122009,-0.01134491,0.0044784546,-0.017730713,-0.0071792603,0.010414124,0.023239136,0.015419006,-0.0026130676,0.032409668,-0.009735107,0.0006456375,-0.021499634,0.004928589,0.020584106,0.05432129,0.009284973,0.00036859512,-0.011734009,0.00033426285,0.012184143,0.00869751,0.019165039,-0.034332275,-0.046905518,-0.011169434,-0.03555298,0.008148193,-0.012512207,-0.0010089874,-0.010940552,0.014625549,-0.011993408,-0.0072746277,-0.0099487305,0.031585693,0.008392334,-0.018692017,-0.0026626587,-0.01007843,0.004169464,-0.031341553,0.011253357,-0.04977417,-0.027770996,-0.04458618,-0.036712646,0.022491455,0.0040283203,-0.001868248,-0.005214691,0.010261536,-0.016296387,-0.0074424744,0.022476196,-0.0074043274,-0.006767273,0.0011291504,0.019104004,-0.02279663,0.027618408,-0.024673462,-0.012031555,0.014221191,0.0034122467,0.023422241,-0.0021686554,0.009635925,0.009162903,0.0132369995,0.027908325,0.0014705658,0.019744873,-0.014167786,-0.009353638,-0.0007882118,-0.0077934265,0.02558899,-0.008964539,-0.031402588,-0.01625061,-0.009567261,-0.02809143,-0.0027580261,0.024795532,0.0013580322,-0.01373291,0.053344727,-0.028930664,-0.0011835098,0.010749817,0.0074310303,0.00027680397,0.0149383545,0.029693604,0.009490967,0.015090942,-0.0007801056,-0.032592773,-0.029541016,0.0019874573,-0.0020866394,-0.02973938,-0.0033988953,0.0090789795,0.019485474,0.04360962,-0.0077056885,0.013877869,0.019729614,-0.010108948,0.021438599,0.015342712,0.04257202,0.00504303,-0.009841919,-0.0018730164,0.025131226,-0.010726929,0.013069153,0.0038433075,0.02104187,-0.06378174,0.007980347,-0.0031471252,0.02784729,0.007575989,0.01637268,-0.011947632,0.004501343,-0.044891357,-0.015960693,-0.034301758,0.011604309,0.036468506,0.020431519,0.018585205,-0.0036354065,-0.030227661,0.03677368,0.024658203,-0.011695862,-0.03048706,-0.011802673,0.02027893,-0.0038928986,0.018692017,0.009552002,-0.022994995,-0.008621216,0.0052871704,0.0034236908,0.0018959045,-0.0052108765,0.01423645,0.018966675,-0.006866455,-0.010528564,0.001294136,0.013389587,0.010108948,0.015098572,-0.028564453,0.027954102,0.056884766,-0.022537231,0.026275635,0.02848816,-0.034210205,0.042236328,-0.010223389,0.02104187,-0.01663208,-0.0045547485,-0.045135498,-0.014472961,-0.03164673,0.0056266785],"createdAt":"2026-04-18T18:31:54.842Z","updatedAt":"2026-04-22T15:00:21.394Z","lastSeenAt":"2026-04-22T15:00:21.394Z","tsv":"'/api/v1/config':38,97 '/config':133 '/request':14,32,203 '0.02':13,31,167,202 '000':161 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':172 '20':160 '6':165 'Base network API' 'USDC gated API' 'accept':154 'access':103 'account':139 'address':171 'advertis':176 'ai/ml':60 'analysi':180 'analyt':59 'api':10,28,55,83,102 'base':18,36,79,129 'broad':49 'broader':174 'catalog':50 'challeng':74,107,148 'charg':12,30 'classif':183 'config':4,22 'config-endpoint' 'configur':140 'confirm':149 'connect':123 'content':128 'convers':195 'crawl':115,221 'data':58 'decim':166 'detail':212 'doc':116 'document':213 'embed':184 'endpoint':5,23,39,56,98,151,177,218 'estim':192 'exact':109 'exampl':210 'exchang':187 'expos':47 'fee':94 'feed':186 'finance/web3':62 'flat':90 'found':215 'gas':191 'gate':3,21,69 'generat':197 'geocod':193 'infer':61 'infrastructur':64 'key':84 'label':100 'like':135 'limit':87 'live':153 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':43 'metadata':141 'multi':9,27 'multi-api':8,26 'network':80 'no-api-key' 'no-rate-limit' 'openapi':207 'page':117 'part':41 'path':132 'pay':169 'pay-per-request API' 'payabl':54 'payload':111 'payment':73 'per':92 'per-request':91 'per-request-pricing' 'platform':11,29,45,137,175 'point':205 'post':155 'premium':101 'premium API access' 'price':185,204 'prompt':124 'quot':190 'rate':86,188 'request':67,93,156 'request/response':209 'requir':75,157 'respons':110 'return':118,136 'schema':208 'sentiment':179 'span':57 'specif':96 'specul':145 'summar':182 'text':181 'token':189 'undocu':113 'unit':162 'usdc':16,34,76,164 'usdc-base' 'util':65 'valid':194 'via':15,33 'wallet':122 'wallet-connect':121 'x402':2,20,53,72,106,147 'x402 config' 'x402-gated':1,19 'x402-payable':52 'x402-payment'","prices":[{"id":"9afe881a-c764-4c69-830f-e7bc0e85f163","listingId":"df26df1d-7568-417e-b3dd-7703f489cb47","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/config","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:54.842Z"}],"sources":[{"listingId":"df26df1d-7568-417e-b3dd-7703f489cb47","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/config","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:54.842Z","lastSeenAt":"2026-04-22T15:00:21.394Z"}],"details":{"listingId":"df26df1d-7568-417e-b3dd-7703f489cb47","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/config \\\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":"The endpoint returns a 402 challenge requiring USDC on Base network with maxAmountRequired of 20000 (≈$0.02)","source_url":"https://lowpaymentfee.com/api/v1/config"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages returned only a wallet-connect prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving platform or account configuration metadata via a pay-per-request model","Exploring x402 payment protocol integration as a developer or agent","Accessing a low-cost API gateway without traditional API key management"],"bestFor":["Developers experimenting with x402 payment-gated APIs","AI agents that can autonomously pay per request via USDC on Base","Users who want keyless, commitment-free API access"],"notFor":["Anyone needing well-documented, schema-defined API contracts","High-volume use cases where $0.02/request adds up significantly","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:01.23Z"},"updatedAt":"2026-04-22T15:00:21.394Z"}}