{"id":"88603764-b49a-4897-9fab-6a12a36c3ccd","shortId":"kaE9Mv","kind":"x402","title":"Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base (USDC) 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 at `/api/v1/payments/232` is labeled \"Premium API Access\" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises multiple API categories including 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. Payments settle on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.\n\nDocumentation is extremely sparse — the docs, 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/payments/232` endpoint actually returns. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what data or functionality this specific route provides.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","low payment fee API","crypto-paid API"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content.","The purpose and response format of /api/v1/payments/232 is unknown; 'Premium API Access' is not described anywhere.","No OpenAPI or JSON schema provided for request or response bodies.","The platform lists many endpoint categories (AI, finance, analytics, etc.) but provides zero detail on any of them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/232","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/payments/232","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 request/response examples, and no documentation beyond a landing page listing endpoint names. The specific functionality of /api/v1/payments/232 ('Premium API Access') is entirely undocumented.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T06:50:28.312Z","embedding":[-0.026275635,-0.028152466,0.035583496,0.017532349,0.009529114,-0.03164673,-0.026153564,0.025741577,0.072143555,-0.061523438,0.01411438,-0.049926758,-0.038391113,-0.031951904,-0.029205322,0.008155823,-0.002035141,-0.00069475174,-0.03527832,0.032165527,0.01940918,-0.021270752,-0.021392822,0.03451538,-0.004180908,-0.01889038,-0.008903503,-0.009727478,-0.026290894,-0.04675293,0.052337646,-0.027297974,-0.014381409,0.004749298,-0.02192688,-0.017089844,-0.00026631355,0.02494812,0.028305054,-0.003622055,-0.008834839,-0.05633545,0.017608643,-0.012802124,-0.055145264,0.0049858093,0.0035305023,-0.01991272,0.00944519,0.0018596649,-0.03286743,-0.00881958,-0.009757996,0.00806427,0.0062294006,0.020645142,-0.009170532,-0.01158905,0.018692017,0.01335144,0.0011968613,-0.05303955,-0.016296387,-0.012321472,0.0013952255,0.05935669,-0.0110321045,0.041229248,0.0079193115,0.06536865,0.037628174,0.044921875,0.029769897,0.010986328,-0.002878189,-0.012962341,0.0073776245,0.05819702,-0.0135269165,-0.02017212,-0.0084991455,-0.007133484,-0.062042236,0.0006952286,-0.022003174,-0.0390625,-0.021972656,0.022720337,-0.015548706,0.035827637,-0.06964111,-0.00920105,-0.0154953,0.00022816658,0.010528564,-0.009971619,-0.01461792,0.03237915,-0.0017671585,0.012542725,-0.0039749146,-0.047332764,0.015510559,0.008544922,0.04336548,0.048706055,0.017822266,0.02279663,0.00774765,-0.0068740845,-0.038269043,0.019882202,-0.004699707,-0.014152527,0.018081665,0.017791748,-0.011726379,0.02923584,-0.025344849,0.013893127,-0.05102539,0.045166016,0.007827759,0.008628845,0.009231567,-0.043945312,-0.020126343,0.023712158,-0.023147583,-0.00969696,0.012825012,0.012817383,0.022521973,-0.010429382,-0.038482666,0.017745972,-0.022872925,-0.0131073,-0.041290283,-0.024917603,0.03994751,-0.02305603,0.017654419,0.032928467,-0.0947876,-0.0037384033,-0.045959473,0.011619568,-0.03439331,-0.01474762,-0.0007429123,0.023483276,-0.0087890625,-0.015823364,-0.031311035,-0.028793335,-0.0029888153,0.034118652,-0.009506226,0.04928589,-0.01876831,0.030960083,0.020584106,-0.0006995201,0.014877319,0.024261475,-0.0076560974,-0.07928467,-0.080322266,-0.01474762,0.00066137314,-0.024032593,-0.024337769,0.01146698,-0.018737793,-0.064575195,-0.014328003,-0.019592285,-0.0031433105,-0.03805542,0.001241684,-0.027908325,0.015510559,-0.0054244995,-0.062438965,-0.019897461,-0.02583313,0.058258057,0.025634766,0.027374268,0.020339966,-0.016326904,0.05343628,0.024276733,-0.021133423,-0.017318726,0.021377563,-0.022079468,0.021896362,-0.013374329,0.009063721,-0.034484863,0.041900635,0.06719971,0.010559082,-0.023498535,-0.013504028,-0.05609131,-0.046966553,-0.035491943,0.02017212,0.006828308,-0.0033912659,0.034179688,-0.037139893,-0.025360107,0.010124207,0.012336731,0.020523071,0.06274414,0.011100769,-0.010002136,0.027297974,0.021652222,-0.049713135,0.040100098,0.030685425,0.010643005,-0.022460938,-0.019165039,0.029464722,0.041931152,-0.028167725,0.024505615,-0.015007019,0.031097412,-0.008514404,-0.0033626556,0.010620117,-0.011657715,-0.023208618,-0.031799316,-0.02835083,0.024246216,0.010391235,-0.02949524,-0.03363037,-0.07678223,0.04864502,0.03062439,0.04598999,0.0008845329,0.0059127808,-0.0209198,-0.013206482,-0.07598877,0.06402588,0.0770874,0.0017318726,-0.010368347,0.018051147,-0.017440796,-0.02772522,0.0024147034,-0.017150879,-0.03945923,-0.026473999,0.012901306,-0.043060303,0.0053482056,0.028305054,0.023757935,0.05050659,0.0029125214,-0.050201416,-0.018051147,-0.004840851,-0.00970459,-0.035736084,-0.008796692,-0.009979248,0.014099121,0.017501831,0.00019097328,0.018478394,0.0013389587,-0.0044059753,-0.0062332153,0.0031795502,-0.0071411133,-0.029541016,0.02067566,0.0007829666,-0.054748535,0.001783371,0.0002696514,0.07897949,-0.051208496,0.036621094,-0.008132935,0.0070762634,0.0513916,-0.0010471344,-0.05053711,0.010147095,0.022842407,-0.0018386841,0.04534912,0.009841919,-0.028823853,-0.022628784,0.07965088,-0.01751709,-0.0031433105,0.013877869,0.022872925,0.028274536,0.00178051,-0.06640625,-0.0423584,0.006954193,-0.033721924,0.025650024,-0.022659302,0.02659607,-0.010467529,0.005214691,-0.029769897,-0.0016536713,-0.027374268,0.012542725,-0.01386261,0.0029125214,-0.017196655,-0.028045654,0.018249512,0.013786316,-0.0057296753,0.008544922,0.04550171,0.02406311,-0.0068626404,-0.028457642,-0.028503418,-0.014320374,-0.011558533,0.018722534,0.021911621,0.02822876,0.051879883,-0.04534912,0.00920105,0.02734375,0.011451721,0.029647827,0.00053215027,0.00068187714,-0.07635498,-0.05871582,-0.028503418,-0.035339355,0.030441284,0.0060920715,-0.014541626,0.06100464,0.014640808,-0.020645142,-0.03982544,0.01864624,-0.04522705,-0.0007324219,0.0446167,-0.020507812,-0.021026611,0.01386261,-0.014160156,0.0035381317,0.035186768,0.026428223,0.035217285,0.06530762,0.04107666,0.005004883,0.01737976,0.0073127747,0.028839111,0.009048462,-0.017929077,-0.026901245,-0.015289307,0.040802002,-0.019729614,-0.02243042,-0.05935669,0.06100464,0.051361084,0.084228516,0.021331787,0.0012626648,0.03656006,-0.014419556,0.015235901,-0.01689148,-0.018722534,-0.028686523,-0.053863525,0.03286743,-0.009727478,0.0024929047,-0.016921997,0.035736084,-0.0029201508,0.01675415,-0.026824951,0.041259766,-0.015007019,-0.012557983,0.014305115,0.020599365,0.057128906,0.057647705,-0.043640137,0.016220093,0.019088745,-0.029830933,0.0073776245,0.031036377,-0.010551453,-0.010383606,-0.048583984,-0.029678345,-0.009773254,-0.006614685,-0.044555664,0.0022258759,0.004852295,0.015960693,0.02671814,-0.011749268,-0.012207031,-0.0062217712,-0.018554688,-0.05596924,0.0036373138,-0.044006348,-0.0030326843,0.03970337,-0.02670288,-0.0071144104,-0.0012102127,-0.0035209656,0.006111145,0.016860962,0.02909851,0.00086164474,-0.042022705,0.030212402,0.011878967,0.0051879883,0.0002039671,0.036956787,0.01398468,0.028823853,0.05319214,0.012886047,-0.016677856,-0.06427002,0.03201294,-0.05203247,-0.0055236816,0.023529053,-0.023239136,-0.0025081635,-0.023391724,-0.029769897,-0.03338623,0.009513855,-0.028198242,0.0031719208,0.02067566,-0.01361084,-0.022125244,-0.05432129,-0.026870728,-0.0012378693,0.060943604,0.0236969,0.007068634,-0.05819702,0.002943039,0.01612854,0.009376526,0.043548584,-0.014205933,-0.012580872,-0.021377563,-0.03326416,-0.012397766,-0.023986816,0.018554688,-0.007637024,-0.006893158,0.026931763,0.009216309,0.02281189,0.0021743774,0.014526367,0.024414062,-0.026535034,-0.011184692,-0.0034236908,0.032562256,0.0115356445,-0.0070381165,-0.04272461,0.04019165,0.012260437,0.029129028,-0.045837402,-0.006088257,-0.005947113,0.0009393692,0.01965332,-0.008796692,-0.005466461,-0.0052490234,-0.043823242,-0.06585693,0.03955078,-0.020050049,0.027114868,0.025390625,0.0068092346,0.02961731,-0.0037155151,-0.0020217896,0.010879517,-0.026107788,-0.007736206,-0.025299072,-0.03289795,-0.017227173,-0.010238647,-0.026107788,0.025894165,-0.02027893,0.025878906,0.0040245056,-0.020004272,0.024154663,0.0019435883,-0.005680084,0.013656616,0.0026893616,0.02861023,0.037628174,0.008720398,-0.04208374,0.02041626,-0.0003452301,0.0059165955,-0.003145218,0.041625977,0.03237915,-0.0059432983,-0.010002136,-0.011383057,-0.020751953,-0.021896362,0.003446579,0.0055999756,0.011558533,-0.0026454926,-0.049468994,0.0128479,0.005996704,-0.03643799,-0.02619934,0.0048599243,0.012611389,-0.037261963,0.014434814,0.026275635,0.05493164,-0.01953125,-0.001285553,0.0039711,0.027862549,0.03060913,0.009384155,-0.0060157776,0.016204834,-0.009536743,0.014373779,-0.0061187744,-0.011100769,0.019058228,0.002658844,0.017959595,0.02168274,0.0040626526,-0.021697998,-0.036102295,0.004928589,-0.020477295,-0.030685425,0.019699097,0.013450623,0.029129028,-0.02432251,0.018753052,0.021697998,-0.01651001,-0.015991211,-0.0076522827,0.038879395,-0.020004272,-0.012573242,0.01335907,0.014717102,0.03652954,-0.053741455,-0.003168106,-0.0009384155,0.01083374,-0.028015137,-0.038330078,-0.041107178,0.0044136047,0.033081055,0.012031555,0.021881104,0.0390625,0.008201599,0.0067710876,0.027236938,0.004966736,-0.01651001,-0.010437012,-0.050231934,-0.021957397,-0.010063171,0.0011014938,-0.03149414,0.00957489,-0.00082731247,-0.028198242,0.01499176,-0.0118255615,-0.0043945312,-0.006298065,0.009292603,0.047058105,-0.00047159195,0.021194458,-0.016693115,-0.039978027,-0.0007157326,0.0069465637,0.020080566,-0.045135498,0.021347046,-0.0118255615,-0.010559082,0.007873535,0.0030403137,0.026062012,0.034576416,0.009643555,0.0259552,-0.03881836,0.047668457,-0.044006348,0.0116119385,0.008071899,-0.035125732,-0.011878967,-0.0236969,-0.018722534,0.042144775,-0.032592773,-0.009147644,-0.03515625,-0.04510498,-0.016067505,-0.053497314,0.007850647,0.041137695,0.038604736,-0.03149414,0.0001320839,-0.002204895,0.008491516,-0.014877319,0.005130768,-0.01234436,0.026931763,0.017456055,0.0056495667,-0.03543091,-0.031982422,-0.029129028,-0.0006623268,-0.041259766,-0.04663086,-0.00831604,0.00015962124,-0.010757446,-0.019348145,-0.030319214,-0.0362854,-0.0041542053,-0.047302246,0.004486084,0.004333496,0.014640808,-0.0008826256,-0.019485474,-0.0004439354,0.015670776,-0.018814087,0.039123535,0.0037117004,-0.0049552917,-0.04623413,0.011886597,0.011184692,0.014846802,-0.003786087,-0.018096924,-0.0035572052,-0.017318726,-0.053649902,0.0023651123,-0.0074386597,-0.008621216,-0.014122009,-0.0017538071,-0.050354004,-0.002943039,-0.02217102,0.013137817,0.019989014,0.01864624,0.012062073,0.0010595322,0.012176514,0.0023460388,-0.009094238,-0.031951904,0.020431519,0.010299683,-0.0007300377,0.035491943,0.044433594,0.011077881,-0.028167725,0.008659363,0.0070114136,0.024368286,-0.018829346,0.0115737915,-0.02104187,0.008811951,-0.006198883,-0.017608643,-0.031066895,-0.001083374,0.090270996,0.0035953522,-0.016555786,-0.006225586,-0.02331543,0.023223877,0.034576416,-0.04171753,-0.0032672882,-0.031982422,0.017120361,-0.029312134,0.0069389343,0.009613037,0.020767212,-0.01838684,-0.04989624,-0.010986328,-0.010604858,-0.012863159,-0.061401367,-0.026641846,-0.066223145,0.0013465881,-0.0063934326,-0.01411438,-0.005214691,0.0065689087,-0.015174866,-0.08013916,-0.0027923584,0.047607422,0.014625549,0.022842407,-0.004108429,0.024963379,0.020126343,-0.031555176,-0.0023155212,0.02331543,-0.027679443,-0.020004272,-0.020935059,0.016906738,-0.020248413,-0.00630188,0.005722046,0.0073547363,0.018661499,-0.017028809,0.009140015,-0.012435913,0.010299683,-0.02204895,0.0137786865,-0.0070762634,-0.0076942444,0.0473938,-0.053131104,0.02444458,0.01713562,-0.011276245,0.005142212,0.027755737,0.045410156,-0.035125732,-0.01348114,0.017028809,0.020126343,0.037261963,-0.018844604,0.04260254,0.011795044,-0.0110321045,0.014846802,-0.0053749084,-0.015563965,-0.0340271,-0.02293396,0.02217102,0.006401062,0.0035896301,-0.021270752,0.008132935,0.013160706,-0.0005259514,0.016998291,-0.0022449493,-0.025283813,-0.024780273,-0.00050497055,-0.0032215118,0.004470825,-0.0058517456,0.024810791,0.025100708,0.039489746,0.0107421875,-0.0149002075,-0.002658844,0.035705566,-0.0075912476,0.002620697,0.02609253,0.0064888,0.020645142,0.01838684,0.011688232,-0.043670654,-0.01637268,-0.026901245,-0.022827148,-0.0017023087,-0.0075912476,-0.016357422,-0.00674057,0.0038700104,-0.0074882507,-0.01979065,0.0077400208,-0.026779175,-0.031311035,-0.008712769,-0.010848999,0.03060913,-0.00022614002,0.012298584,0.013320923,-0.0063819885,0.042266846,-0.0023937225,-0.01902771,0.033996582,0.033355713,0.014373779,-0.027816772,-0.009376526,-0.011810303,-0.008232117,0.0022354126,-0.04119873,0.017196655,0.0435791,-0.0231781,0.00573349,0.0021591187,0.03201294,-0.0052375793,0.0040779114,-0.01083374,0.018417358,-0.009361267,0.04510498,-0.050842285,0.029006958,0.010757446,0.00617218,-0.016860962,0.0009860992,-0.029129028,0.016021729,0.0082473755,-0.013183594,0.056640625,-0.0023841858,0.02848816,-0.022476196,-0.024032593,0.008514404,-0.034606934,-0.026748657,0.022232056,-0.008346558,-0.0024032593,0.015090942,-0.023284912,0.036254883,-0.030273438,0.015808105,0.0036640167,0.0022239685,-0.00064611435,-0.018539429,-0.0037517548,-0.018753052,-0.02041626,0.0044670105,-0.004512787,0.051757812,0.012672424,0.02822876,0.060028076,0.019042969,-0.004360199,-0.03466797,-0.031707764,-0.00010198355,-0.010307312,0.013748169,-0.010375977,0.06665039,0.035583496,0.007293701,0.037231445,0.026153564,0.036193848,0.007144928,0.010269165,-0.013137817,0.014976501,-0.0035705566,0.032684326,-0.005596161,0.03237915,-0.03955078,0.026123047,0.018234253,0.028320312,-0.03125,0.0317688,0.06726074,0.009918213,-0.017532349,0.046539307,-0.004966736,-0.0077552795,-0.017028809,-0.018218994,0.056396484,0.008544922,0.04849243,0.058044434,0.013542175,0.0061569214,0.013137817,-0.024429321,-0.026519775,0.063964844,0.017868042,-0.020004272,-0.017852783,-0.0055389404,0.004219055,-0.044067383,-0.021697998,0.025115967,-0.015838623,0.0012712479,-0.01084137,-0.0062332153,-0.016830444,-0.0013151169,0.01940918,0.012123108,-0.021011353,0.0262146,0.03918457,-0.0013980865,0.030914307,-0.0025463104,0.023895264,-0.021194458,-0.03692627,0.015640259,0.023651123,-0.011878967,-0.013916016,0.023513794,0.004589081,0.035369873,0.039489746,-0.017822266,0.0055770874,0.031341553,0.010559082,-0.0073547363,0.06402588,0.03970337,0.01424408,0.04296875,0.027114868,0.03845215,-0.039794922,0.018829346,0.0051078796,0.0034446716,-0.01361084,-0.008987427,0.0052986145,-0.014030457,0.017166138,-0.0032100677,-0.015083313,0.021148682,0.022125244,-0.006511688,-0.011024475,-0.005683899,0.015090942,-0.020599365,-0.0035076141,0.012649536,-0.014625549,0.036376953,0.0118255615,0.02507019,-0.024139404,0.027191162,-0.0005555153,-0.012268066,-0.008743286,0.022964478,-0.029312134,0.0074691772,-0.005935669,0.0045928955,-0.050201416,0.01727295,0.030654907,-0.014877319,0.028717041,0.0126571655,-0.0010223389,-0.0073394775,0.019195557,0.00623703,0.00015819073,-0.009811401,-0.02355957,0.026153564,0.048919678,-0.0018205643,-0.00028133392,-0.024414062,-0.011016846,0.005847931,-0.008308411,-0.0058517456,-0.0051651,-0.02432251,-0.02406311,0.015609741,0.032348633,0.017364502,0.059173584,-0.025939941,-0.014755249,0.01386261,0.032562256,0.003917694,0.0019369125,-0.00655365,0.020980835,-0.019363403,0.048706055,0.035614014,0.016326904,0.034179688,-0.0073547363,-0.019958496,0.008956909,-0.005821228,0.02432251,-0.015182495,0.0022258759,0.0042686462,0.03375244,-0.0112838745,-0.039764404,0.012641907,-0.013175964,-0.024612427,-0.020126343,0.012664795,-0.0009698868,0.034576416,0.041992188,0.02619934,-0.02633667,0.06365967,-0.014152527,0.05102539,0.0010871887,-0.00969696,0.04751587,0.014122009,0.03173828,0.018814087,0.015083313,-0.033843994,0.016860962,0.03302002,0.032958984,0.011550903,0.0042152405,-0.012825012,0.04031372,0.0065078735,0.028839111,-0.0090408325,-0.0014219284,0.0077819824,-0.0035057068,-0.013839722,-0.0015201569,-0.010643005,0.007095337,0.04196167,-0.03173828,-0.016677856,-0.02998352,-0.003917694,0.025299072,-0.019577026,0.008682251,-0.00024068356,-0.02583313,0.011077881,-0.023162842,-0.029647827,0.0054359436,0.023788452,-0.04486084,-0.009414673,-0.002948761,0.015899658,-0.022979736,0.036132812,0.029418945,0.0038547516,0.013427734,0.05114746,-0.014083862,0.031341553,-0.01058197,0.034210205,0.03338623,0.010124207,-0.015274048,-0.0025463104,0.016143799,-0.0096206665,0.013725281,0.035095215,-0.009605408,0.0005712509,0.0015983582,-0.002155304,-0.0009741783,0.0043144226,-0.0057373047,0.00522995,-0.00724411,-0.006855011,0.0013132095,0.0016956329,0.00008112192,0.005542755,-0.006137848,-0.01058197,0.008110046,0.034088135,0.023376465,-0.041229248,-0.0059776306,0.006816864,0.008483887,-0.016921997,-0.014823914,0.005443573,-0.038116455,0.015197754,0.015823364,0.0135269165,0.013824463,-0.031555176,0.0035381317,0.01876831,0.0149383545,0.016860962,0.0063476562,-0.005962372,0.009941101,-0.008087158,-0.0009899139,-0.0032539368,-0.010475159,0.012512207,0.024993896,-0.002275467,-0.033691406,0.020004272,0.0029125214,0.011657715,-0.0006542206,-0.007843018,0.025009155,-0.00541687,-0.0026760101,0.0025539398,0.01398468,-0.00818634,-0.01637268,-0.012748718,0.03503418,0.057678223,-0.0041656494,-0.00932312,0.020904541,0.02041626,0.015312195,0.037750244,-0.00027656555,0.04321289,0.026443481,-0.018081665,-0.01525116,0.020095825,-0.008430481,-0.029251099,0.012588501,-0.018447876,-0.013763428,0.016784668,0.006439209,0.0013084412,-0.032562256,-0.0103302,-0.009315491,-0.012901306,0.021270752,-0.0105896,0.010261536,-0.022964478,-0.010025024,0.0028839111,-0.022018433,-0.046081543,-0.019332886,-0.0044059753,-0.00944519,-0.05795288,0.008300781,-0.030059814,0.013427734,-0.02520752,-0.0050811768,-0.01184845,0.017028809,-0.013969421,-0.0077819824,0.0030708313,0.028839111,0.028503418,0.007835388,0.029342651,-0.03527832,-0.018127441,-0.02861023,0.0065231323,-0.011314392,0.02583313,0.0023593903,0.034210205,0.021270752,-0.019348145,-0.0005106926,-0.011741638,-0.011169434,-0.018157959,-0.014450073,-0.029022217,0.027130127,0.009109497,-0.011672974,-0.008987427,0.04269409,-0.031799316,-0.014862061,0.033477783,0.041412354,0.016403198,0.027755737,-0.018981934,-0.012329102,-0.018554688,0.0034828186,-0.019973755,0.011444092,0.0077590942,0.00730896,-0.0048713684,0.010932922,0.02230835,-0.003692627,-0.0059127808,0.03643799,0.0066184998,-0.0056991577,0.043762207,0.01020813,0.009544373,-0.006855011,-0.0074043274,0.019821167,0.04711914,0.008682251,0.011688232,-0.0021858215,-0.00029039383,-0.013694763,0.010444641,0.018112183,-0.01979065,-0.051239014,-0.018981934,-0.033996582,0.018341064,-0.0011339188,0.006965637,-0.010551453,0.016693115,-0.015136719,-0.034484863,-0.013282776,0.030761719,0.010429382,-0.007820129,-0.014671326,0.009788513,0.014373779,-0.035125732,0.00088596344,-0.046295166,-0.03378296,0.0026302338,-0.026535034,0.02571106,0.0126571655,-0.010467529,-0.00071525574,-0.0115737915,-0.002445221,-0.007106781,0.024276733,-0.002029419,-0.005382538,0.029724121,0.021011353,-0.013023376,0.015068054,-0.005168915,-0.0014915466,0.018981934,-0.010101318,0.014968872,-0.019058228,0.032806396,-0.00982666,0.002658844,0.031021118,-0.0119018555,0.011932373,-0.035186768,0.011436462,-0.00071048737,-0.009788513,0.030471802,-0.03540039,-0.018188477,0.0052833557,-0.022369385,-0.03024292,0.0060920715,0.016830444,0.03982544,-0.007457733,0.04663086,-0.013053894,-0.009529114,0.019104004,0.008293152,-0.015235901,0.0052757263,0.025421143,-0.00064849854,-0.010658264,-0.0062065125,-0.005706787,-0.030014038,-0.012802124,0.01626587,-0.0041122437,-0.009468079,0.02670288,0.008125305,0.04034424,0.00022435188,0.013313293,0.012924194,0.015136719,0.026168823,0.004169464,0.05630493,-0.009170532,-0.035064697,0.0022678375,0.0069465637,-0.020385742,-0.0009975433,-0.009628296,-0.00034189224,-0.039489746,0.017715454,-0.007419586,0.025238037,-0.02357483,0.011138916,-0.022323608,-0.0016126633,-0.045654297,-0.013893127,-0.02456665,0.011329651,0.02909851,-0.0010890961,0.026275635,0.0053253174,-0.024414062,0.021850586,0.046020508,-0.0082092285,-0.025115967,-0.018859863,0.008079529,-0.0069389343,0.0096588135,0.0058937073,-0.028503418,-0.011070251,0.008056641,-0.025772095,0.0041618347,-0.0045166016,0.02017212,0.0038414001,0.0003902912,-0.012748718,0.024642944,-0.0068626404,-0.0154418945,0.011154175,0.008560181,0.03778076,0.030883789,-0.018798828,0.014289856,0.020339966,-0.042236328,0.05834961,0.0024318695,0.026275635,-0.016677856,-0.00020897388,-0.039154053,-0.02406311,-0.021743774,-0.0038547516],"createdAt":"2026-04-18T18:50:07.590Z","updatedAt":"2026-04-24T02:02:30.176Z","lastSeenAt":"2026-04-24T02:02:30.176Z","tsv":"'/api/v1/payments/232':61,202 '/request':13,30,151 '0.02':12,29,71,150 '000':75 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':161 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':164 '20':74 '402':213 '6':81 'Base network API' 'USDC micropayment API' 'accept':50 'access':66 'account':86 'actual':204 'address':160 'advertis':91,105 'ai':117 'analysi':121 'analyt':111 'api':5,15,22,32,42,65,84,107 'attach':94 'base':8,25,55,76,166 'broader':103 'call':4,21,73 'caller':92 'categori':108 'chain':158 'challeng':214 'charg':68 'classif':124 'connect':181 'content':187 'convers':141 'crypto-paid API' 'data':110,114,222 'decim':82 'descript':198 'doc':172 'document':167,217 'embed':125 'endpoint':59,144,203,207 'estim':135 'exampl':195 'exchang':130 'export':115 'extrem':169 'feed':129 'financ':126 'function':224 'gas':134 'generat':142 'geocod':139 'header':98 'includ':109 'infrastructur':137 'insight':116 'json-response' 'key':16,33,85 'label':63 'learn':119 'limit':89 'list':146 'live':209 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':118 'metric':112 'multipl':106 'network':56 'no-api-key' 'on-chain':156 'openapi':191 'page':176 'pay':2,19,39 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':38 'payment':52,97,154 'per':3,20,40,72 'platform':6,23,43,104 'point':153 'post-method' 'premium':64 'price':128,152,173 'prompt':183 'protocol':48 'provid':228 'quot':133 'rate':88,131 'readm':175 'render':178 'report':113 'request':41,101 'request/response':194 'requir':17,34 'return':205,210 'rout':227 'schema':192 'sentiment':120 'settl':155 'simpli':93 'spars':170 'specif':58,226 'summar':123 'text':122 'token':132 'unclear':220 'unit':77 'usdc':9,26,51,79,163 'usdc-base' 'use':45,162 'util':138 'valid':140,212 'via':10,27 'wallet':182 'web3':127 'without':216 'x402':11,28,47,96 'x402 API' 'x402-payment'","prices":[{"id":"bf11b962-aab4-4c5f-8d2d-f7db20957759","listingId":"88603764-b49a-4897-9fab-6a12a36c3ccd","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/payments/232","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:07.590Z"}],"sources":[{"listingId":"88603764-b49a-4897-9fab-6a12a36c3ccd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/232","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:07.590Z","lastSeenAt":"2026-04-24T02:02:30.176Z"}],"details":{"listingId":"88603764-b49a-4897-9fab-6a12a36c3ccd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/232 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 USDC base units on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/232"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/232"},{"claim":"Platform advertises categories: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without creating an account or managing API keys","Making one-off paid API calls from autonomous agents using x402 on Base","Integrating pay-per-use endpoints into workflows that settle in USDC"],"bestFor":["Agents or developers who want zero-signup, pay-as-you-go API access","x402-compatible clients on the Base network","Low-volume or sporadic API usage where subscriptions are overkill"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Developers who cannot transact in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:07.967Z"},"updatedAt":"2026-04-24T02:02:30.176Z"}}