{"id":"8d789383-df85-4cdb-9b56-df3df0ef62be","shortId":"84nywT","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 an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/policies/56` is listed as \"Premium API Access\" and returns `application/json` via POST. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which has 6 decimals), equating to $0.02 per call. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe platform's landing page advertises additional 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 price point. However, documentation pages (/docs, /pricing, /api, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual behavior, input schemas, and response formats of these endpoints are undocumented in the crawled material. The exact functionality behind the `/api/v1/policies/56` path is unclear — the name \"Premium API Access\" is generic and no input/output schema details are provided beyond the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-api","no-api-key","no-rate-limit"],"categories":["api-platform","finance","ai"],"synonyms":["x402 api","pay per call api","usdc api","base network api","micropayment api","lowpaymentfee","crypto api payment"],"warnings":["The exact functionality of /api/v1/policies/56 is unknown — 'Premium API Access' is a generic label with no further description.","No documentation is available: /docs, /pricing, /api, and /README all returned only a 'Connect wallet' prompt.","No input schema or response schema is documented; callers cannot know what to send or expect back.","The platform lists many endpoints on its landing page but none have documented behavior or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/56","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/policies/56","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no input/output examples, and the purpose of '/api/v1/policies/56' is entirely opaque. All doc pages 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":"2026-04-19T08:05:50.289Z","embedding":[-0.007835388,-0.042541504,0.049468994,0.016326904,0.006916046,-0.015838623,-0.028442383,0.027679443,0.08660889,-0.04647827,0.040039062,-0.0501709,-0.03466797,-0.046539307,-0.023239136,0.016647339,-0.010848999,0.011550903,-0.026901245,0.038726807,0.012748718,-0.002626419,-0.04034424,0.034240723,0.0067329407,-0.033203125,0.00793457,-0.0032806396,-0.009407043,-0.049743652,0.04171753,-0.02796936,-0.002937317,0.0042648315,-0.029525757,-0.0014219284,-0.010482788,0.036468506,0.022064209,-0.008850098,-0.015960693,-0.06939697,0.0071372986,-0.018249512,-0.056732178,0.0076789856,0.010543823,-0.015083313,0.0017166138,0.0024547577,-0.039978027,-0.010910034,-0.0038528442,-0.01260376,0.0028686523,0.00472641,0.0126571655,-0.010482788,0.018859863,0.010032654,0.0026836395,-0.07269287,-0.019607544,-0.0025730133,0.010726929,0.06585693,0.010147095,0.041229248,0.012535095,0.066833496,0.050994873,0.052703857,0.018325806,0.004261017,-0.020812988,-0.009857178,-0.0047836304,0.06213379,-0.016143799,-0.028060913,-0.012168884,-0.019104004,-0.037384033,0.0082092285,0.00029826164,-0.039855957,-0.025787354,0.007785797,-0.030853271,0.029434204,-0.066589355,-0.008529663,-0.026763916,-0.0008716583,0.011444092,-0.015159607,-0.0093688965,0.020584106,-0.012458801,0.014213562,-0.004386902,-0.045654297,0.0016851425,0.018432617,0.04815674,0.04925537,0.034484863,0.019897461,0.020843506,-0.010925293,-0.03881836,0.004814148,-0.0135269165,-0.002204895,0.014434814,0.0041122437,-0.029907227,0.0390625,-0.02508545,0.018234253,-0.054626465,0.037200928,0.01928711,-0.012687683,0.010047913,-0.057159424,-0.020996094,0.020187378,-0.036193848,-0.00957489,0.012252808,0.011520386,0.035949707,-0.020568848,-0.041748047,0.016937256,-0.009819031,-0.015975952,-0.051605225,-0.041107178,0.036346436,-0.025756836,0.023727417,0.03579712,-0.109069824,-0.0048332214,-0.046295166,0.007335663,-0.026382446,-0.0049819946,0.0042877197,0.035583496,-0.010108948,-0.012367249,-0.026367188,-0.028182983,-0.002084732,0.04385376,-0.0061950684,0.0602417,-0.017318726,0.040100098,0.009841919,0.009353638,0.03466797,0.029830933,0.020492554,-0.07220459,-0.08996582,-0.028427124,-0.013671875,-0.019744873,-0.024414062,0.018844604,-0.013763428,-0.095703125,-0.02583313,-0.022079468,-0.00944519,-0.024124146,0.008071899,-0.033569336,-0.005054474,-0.026809692,-0.060638428,-0.025558472,-0.027526855,0.061279297,0.024887085,0.023376465,0.034973145,-0.02116394,0.054534912,0.028533936,-0.018737793,-0.028152466,0.022567749,-0.03250122,0.010856628,0.011871338,-0.0024166107,-0.030532837,0.041656494,0.06561279,-0.0024528503,-0.019363403,-0.014213562,-0.05532837,-0.04107666,-0.049316406,0.008872986,-0.0076065063,-0.0030174255,0.029632568,-0.042541504,-0.021484375,-0.008071899,0.014762878,0.009498596,0.08123779,0.005996704,0.0047798157,0.043548584,0.010063171,-0.057891846,0.041809082,0.014846802,0.016983032,-0.03250122,-0.019210815,0.018630981,0.0435791,-0.024810791,0.015083313,-0.017562866,0.028060913,-0.0054626465,0.017974854,0.012016296,-0.016555786,-0.024917603,-0.025802612,-0.0096206665,0.029373169,-0.0053749084,-0.020462036,-0.02166748,-0.075683594,0.036895752,0.035095215,0.028717041,0.0026664734,0.01398468,-0.02180481,-0.0110321045,-0.06427002,0.0569458,0.06866455,0.0002257824,-0.025970459,0.019500732,0.002313614,-0.01739502,-0.0066184998,-0.01675415,-0.0440979,-0.021377563,0.017486572,-0.029296875,-0.00014305115,0.012825012,0.026382446,0.04373169,-0.0064201355,-0.048461914,-0.020614624,0.0014638901,-0.0043640137,-0.03152466,0.0075798035,-0.0075149536,0.0018157959,0.0050697327,-0.0041389465,0.026641846,-0.010025024,-0.013008118,-0.011604309,0.005126953,-0.020706177,-0.029144287,0.030136108,0.0022125244,-0.056488037,0.0019102097,-0.008918762,0.07128906,-0.054351807,0.035308838,-0.0054740906,0.010353088,0.062408447,-0.008766174,-0.046203613,0.009384155,0.025604248,0.032562256,0.038330078,0.009880066,-0.031280518,-0.009750366,0.059265137,-0.009284973,-0.017684937,0.012924194,-0.0017976761,0.028152466,-0.012046814,-0.058166504,-0.01914978,0.00036597252,-0.039611816,0.020858765,-0.012825012,0.02255249,-0.008491516,0.015007019,-0.017242432,0.015670776,-0.017929077,0.017349243,-0.028717041,0.010223389,-0.017318726,0.002779007,0.0020961761,0.017532349,-0.008125305,0.01574707,0.03439331,0.0059318542,-0.0124053955,-0.027130127,-0.03375244,-0.027389526,-0.0008511543,0.008773804,0.011917114,0.020248413,0.057647705,-0.03466797,0.000688076,0.019332886,0.019607544,0.03286743,0.0050621033,0.00034308434,-0.07006836,-0.070007324,-0.016464233,-0.027633667,0.020233154,0.02458191,-0.00048589706,0.0440979,-0.00078964233,-0.017623901,-0.033813477,0.019622803,-0.036315918,-0.0051498413,0.03768921,-0.025604248,-0.029190063,0.008132935,0.002040863,-0.0050621033,0.049224854,0.019058228,0.016860962,0.07434082,0.04812622,0.001616478,0.021377563,-0.0010795593,0.029769897,-0.00068712234,-0.01940918,-0.020950317,-0.010498047,0.033813477,-0.016983032,-0.01940918,-0.057006836,0.052490234,0.029296875,0.07324219,0.027389526,0.01675415,0.03704834,-0.015258789,0.0048294067,-0.024276733,-0.010932922,-0.042175293,-0.035888672,0.01878357,-0.012954712,-0.006340027,-0.034088135,0.042816162,-0.011581421,0.020004272,-0.032958984,0.037994385,-0.010932922,-0.002122879,0.018325806,0.00333786,0.048461914,0.06329346,-0.038238525,0.02319336,0.02520752,-0.023590088,-0.013961792,0.041809082,-0.0069389343,-0.013046265,-0.051086426,-0.02067566,-0.006122589,0.008773804,-0.05731201,-0.00623703,-0.0025482178,0.0063972473,0.037902832,-0.011138916,-0.008918762,-0.01727295,-0.013336182,-0.049835205,0.0062561035,-0.03894043,-0.005393982,0.051513672,-0.025390625,0.004798889,0.0025119781,-0.011695862,-0.005859375,0.009719849,0.035980225,0.0014648438,-0.049102783,0.05340576,0.015296936,0.010185242,0.02279663,0.037750244,0.021759033,0.029632568,0.03942871,0.016906738,-0.024780273,-0.06982422,0.027633667,-0.056274414,0.024246216,0.019805908,-0.028656006,-0.0036621094,-0.016326904,-0.033172607,-0.024871826,0.0069999695,-0.036254883,0.016616821,0.0055236816,-0.022445679,-0.025253296,-0.041809082,-0.011299133,-0.00749588,0.061645508,0.035888672,-0.00415802,-0.0657959,-0.011421204,0.021240234,0.01777649,0.02810669,-0.015007019,-0.0121154785,-0.029144287,-0.020767212,-0.019866943,-0.03100586,0.019805908,-0.018554688,-0.014724731,0.020431519,0.0022563934,0.019119263,0.011054993,0.0069274902,0.015838623,-0.032928467,-0.0019464493,-0.01864624,0.030303955,0.0057907104,-0.0027370453,-0.042999268,0.029876709,0.01939392,0.028076172,-0.029510498,0.005004883,-0.0070343018,0.008079529,0.01247406,0.0020523071,-0.0061149597,-0.0026779175,-0.045898438,-0.07885742,0.03945923,-0.027923584,0.04119873,0.015586853,0.010543823,0.02166748,0.0019378662,0.0027446747,0.022888184,-0.01890564,-0.0022716522,-0.012992859,-0.03253174,-0.036376953,-0.0178833,-0.027069092,0.030380249,-0.017959595,0.019836426,-0.0059165955,-0.013130188,0.0138549805,0.006324768,-0.010215759,0.00434494,0.0056381226,0.010215759,0.038513184,0.013069153,-0.046661377,0.020980835,0.023162842,0.0040664673,-0.017150879,0.034942627,0.023147583,-0.013305664,-0.005908966,-0.008079529,-0.002866745,-0.014923096,-0.000047028065,0.0009484291,0.010658264,-0.0110321045,-0.03189087,-0.0016412735,0.010154724,-0.03640747,-0.017730713,0.019119263,0.002374649,-0.038208008,0.0143966675,0.011634827,0.043762207,-0.030517578,0.00919342,0.0014925003,0.02760315,0.012229919,0.013069153,0.0043258667,0.023208618,-0.007987976,0.007331848,-0.004257202,-0.008224487,0.025100708,0.0060195923,0.024932861,0.020584106,0.0016613007,-0.029144287,-0.026901245,0.01675415,-0.02204895,-0.024368286,0.024810791,0.017318726,0.021652222,-0.026031494,0.015533447,0.014472961,-0.009521484,-0.016784668,-0.010757446,0.03213501,-0.008415222,-0.022354126,0.012786865,0.00699234,0.019378662,-0.0524292,0.0028972626,-0.010551453,0.0071258545,-0.02760315,-0.043670654,-0.03527832,0.022216797,0.045837402,0.017425537,0.01763916,0.027023315,0.0051956177,0.0036888123,0.028640747,-0.00082969666,-0.0082092285,-0.022842407,-0.043060303,-0.0055274963,-0.010322571,-0.0010232925,-0.047302246,0.016860962,-0.01802063,-0.035003662,0.008392334,-0.0027332306,-0.0066070557,-0.005378723,-0.008964539,0.022399902,-0.0026836395,0.01965332,-0.019882202,-0.04156494,-0.014411926,0.0057678223,0.024414062,-0.04788208,0.015625,-0.007686615,0.0007109642,0.015350342,0.017837524,0.02734375,0.029632568,0.011787415,0.027420044,-0.05307007,0.044952393,-0.031341553,0.021865845,0.0006341934,-0.030532837,-0.012832642,-0.012748718,-0.0065727234,0.03488159,-0.0184021,-0.019119263,-0.035736084,-0.040740967,-0.017425537,-0.05923462,0.01675415,0.042541504,0.034454346,-0.020599365,0.0019254684,0.0012989044,-0.0017900467,-0.012870789,0.0051956177,-0.0017747879,0.030319214,0.02470398,-0.0039634705,-0.030853271,-0.024917603,-0.01235199,0.00035452843,-0.041381836,-0.052642822,0.00013899803,0.004108429,-0.009468079,-0.016983032,-0.033203125,-0.035003662,-0.011352539,-0.034942627,0.006122589,0.0026474,0.0053901672,0.014274597,-0.037109375,0.0016031265,0.013267517,-0.019241333,0.031921387,-0.0015010834,-0.0009088516,-0.039886475,0.010818481,0.020599365,0.017364502,-0.009414673,-0.012962341,-0.016174316,-0.018432617,-0.060180664,0.00970459,-0.0028095245,-0.0053520203,0.0024757385,0.0019931793,-0.046295166,-0.004688263,-0.009689331,0.0025634766,0.010169983,0.016815186,0.010421753,0.005180359,0.017364502,0.0023555756,-0.0072250366,-0.032196045,0.027069092,0.011077881,0.0046920776,0.015029907,0.047821045,0.000028550625,-0.024993896,0.004337311,0.011421204,0.013473511,-0.023498535,0.0011205673,-0.018920898,-0.00049877167,-0.025802612,-0.013893127,-0.031219482,0.00034546852,0.08276367,0.00021457672,-0.004337311,-0.015777588,-0.020980835,0.020980835,0.040863037,-0.04284668,-0.008903503,-0.03286743,0.021957397,-0.012886047,0.0011081696,0.0037612915,0.010925293,-0.016784668,-0.050994873,-0.025817871,0.0041618347,-0.013122559,-0.0637207,-0.02406311,-0.07696533,0.010147095,-0.02067566,-0.035461426,0.0044670105,0.001996994,-0.017852783,-0.08074951,0.0072898865,0.052825928,0.012077332,0.018432617,-0.010635376,0.013587952,0.030822754,-0.05102539,-0.016921997,0.03555298,-0.03366089,-0.018615723,-0.020187378,0.016189575,-0.013427734,-0.01184082,-0.010665894,0.011375427,0.01637268,-0.0053863525,0.015914917,-0.008773804,0.030212402,-0.020492554,0.020248413,-0.0126571655,-0.006790161,0.045898438,-0.04650879,0.018981934,0.017074585,-0.001502037,-0.0032310486,0.031555176,0.03866577,-0.032928467,-0.018539429,0.012184143,0.02003479,0.049041748,-0.02519226,0.056427002,0.020492554,-0.02267456,0.024353027,-0.016525269,-0.011741638,-0.039520264,-0.02368164,0.023040771,-0.009803772,0.018081665,-0.027526855,0.0143585205,0.018920898,-0.0030288696,0.011512756,-0.015464783,-0.026504517,-0.02760315,0.0076522827,-0.002998352,-0.006916046,-0.006954193,0.026947021,0.017440796,0.038391113,0.010505676,-0.014862061,0.0028495789,0.019897461,-0.011856079,0.00623703,0.026885986,0.0061035156,0.008995056,0.020065308,0.0068206787,-0.055358887,-0.0026760101,-0.021392822,-0.02432251,0.012504578,-0.005470276,0.0071525574,-0.015625,0.004901886,-0.0061912537,-0.036712646,0.004676819,-0.021743774,-0.029876709,-0.0006957054,-0.021148682,0.016311646,-0.0002641678,0.015533447,0.0052452087,-0.0061836243,0.042144775,-0.009460449,-0.003522873,0.03201294,0.047851562,0.014976501,-0.025405884,-0.008094788,-0.012878418,0.0034866333,0.004547119,-0.033203125,0.0033454895,0.05026245,-0.022903442,0.014884949,0.00919342,0.03314209,-0.003522873,-0.0047035217,0.0034103394,0.017852783,-0.00774765,0.036193848,-0.043762207,0.0071372986,0.0064353943,-0.0010232925,-0.016830444,-0.014701843,-0.018356323,0.008720398,-0.0047454834,-0.009407043,0.050994873,0.012786865,0.025039673,-0.017608643,-0.027160645,0.00046110153,-0.027740479,-0.014251709,0.025726318,0.0003437996,0.00032830238,0.022262573,-0.009056091,0.042297363,-0.03842163,0.0020503998,0.018127441,-0.012435913,-0.011024475,-0.013313293,-0.017501831,-0.008583069,-0.0013856888,0.008132935,-0.006149292,0.043029785,0.0008420944,0.04373169,0.038360596,0.025772095,-0.00046634674,-0.043762207,-0.026763916,0.00085258484,-0.008277893,0.020004272,-0.012878418,0.04147339,0.032684326,-0.005092621,0.034362793,0.037139893,0.026687622,0.005634308,0.0090789795,-0.009963989,0.012298584,0.0074501038,0.021499634,-0.0004618168,0.044403076,-0.03604126,0.03314209,0.0134887695,0.016525269,-0.032287598,0.043426514,0.06689453,0.016815186,-0.0007658005,0.04397583,-0.00573349,-0.018997192,-0.0021133423,-0.014213562,0.039794922,-0.0062217712,0.0496521,0.04043579,0.016983032,-0.008338928,0.036254883,-0.027633667,-0.036895752,0.05996704,0.023910522,-0.026687622,-0.011421204,-0.008270264,0.0051498413,-0.036865234,-0.032318115,0.02154541,-0.010429382,-0.0021324158,-0.006061554,0.0024528503,-0.0070648193,0.013015747,0.014671326,0.0051231384,0.0014982224,0.027038574,0.034240723,0.00083875656,0.031433105,0.012504578,0.03274536,-0.016662598,-0.02696228,0.027313232,0.019927979,0.0017766953,-0.0029754639,0.018325806,0.015792847,0.045806885,0.039001465,-0.033203125,0.011711121,0.02760315,0.004550934,-0.005092621,0.044952393,0.03353882,0.0050621033,0.026489258,0.037628174,0.04095459,-0.03378296,0.008117676,-0.0030002594,0.00504303,-0.0028324127,-0.009170532,0.0060577393,-0.00667572,0.0135269165,-0.016662598,-0.008560181,0.021255493,0.024765015,0.0018424988,-0.010185242,-0.00819397,0.010726929,-0.014976501,0.0030460358,0.018112183,-0.020355225,0.029953003,0.025238037,0.021820068,-0.022018433,0.024215698,-0.001996994,-0.028289795,0.002620697,0.024520874,-0.045684814,-0.005302429,-0.010406494,0.005596161,-0.047607422,0.01184845,0.02305603,-0.008384705,0.02609253,0.00617218,0.00018084049,-0.015388489,0.02255249,0.009925842,-0.0013237,-0.0030708313,-0.016845703,0.028549194,0.03741455,-0.0005941391,0.010124207,-0.02255249,-0.004814148,0.019363403,0.005153656,0.0051498413,-0.020492554,-0.014030457,-0.031982422,0.00856781,0.032043457,0.029800415,0.047821045,-0.024429321,-0.0026988983,0.0042381287,0.031097412,0.0015048981,0.008522034,-0.014144897,0.022583008,-0.018920898,0.040924072,0.04333496,0.0048294067,0.036224365,-0.0074768066,-0.0262146,0.012207031,-0.002878189,0.020004272,-0.017501831,0.013763428,-0.012084961,0.01626587,-0.01335144,-0.029327393,0.004840851,-0.015533447,-0.026489258,-0.0154800415,0.007888794,-0.0033798218,0.028793335,0.026855469,0.024169922,-0.02444458,0.060424805,-0.014556885,0.03741455,0.00315094,-0.0011615753,0.045532227,0.025039673,0.026382446,0.01739502,0.015083313,-0.037475586,0.025878906,0.021896362,0.024902344,0.008033752,0.012825012,-0.0137786865,0.041381836,0.011192322,0.03213501,0.0015945435,-0.0012292862,0.018554688,-0.0039405823,-0.009628296,-0.0023918152,-0.017211914,0.009063721,0.028259277,-0.019363403,-0.011642456,-0.018051147,-0.0181427,0.03567505,-0.005256653,-0.0051994324,-0.0018014908,-0.022003174,0.010025024,-0.02142334,-0.021881104,0.0059661865,0.027236938,-0.043945312,-0.0066375732,0.0029239655,0.022521973,-0.012687683,0.02418518,0.035003662,0.010307312,-0.00831604,0.040130615,-0.003616333,0.028320312,-0.014450073,0.027130127,0.036254883,0.002462387,-0.021209717,0.0051498413,0.0143585205,-0.0154800415,0.0048828125,0.042938232,-0.0051727295,-0.00111866,0.0009198189,-0.009513855,0.0034313202,0.008575439,-0.0152282715,0.0056381226,-0.0056419373,-0.019866943,-0.0057373047,0.0010099411,0.0038166046,0.0026664734,-0.013519287,-0.013069153,0.018539429,0.03262329,0.015777588,-0.023452759,-0.00096416473,0.011978149,0.019760132,-0.028869629,-0.006500244,0.005290985,-0.04046631,0.01675415,0.020004272,0.0021076202,0.021072388,-0.01852417,-0.014129639,0.02720642,0.009178162,0.019973755,0.007331848,-0.010749817,0.019805908,-0.013656616,-0.010734558,-0.01486969,-0.0020198822,0.0044517517,0.026733398,-0.00048422813,-0.028076172,0.037322998,-0.0032596588,0.018692017,0.004875183,-0.02407837,0.015899658,-0.017593384,-0.0036525726,-0.004802704,0.010246277,-0.017074585,-0.015083313,-0.009719849,0.036468506,0.052368164,-0.0016202927,-0.0146484375,0.026550293,0.013671875,0.023849487,0.040039062,0.0013198853,0.030410767,0.020751953,-0.028503418,-0.021484375,0.016555786,-0.015945435,-0.027786255,0.017745972,-0.00944519,-0.003004074,0.022598267,0.004398346,0.0026340485,-0.035247803,-0.011062622,-0.0063476562,-0.008773804,0.016418457,-0.005584717,0.016189575,-0.016647339,-0.016601562,0.0032901764,-0.025024414,-0.0552063,-0.018920898,0.0005373955,-0.01689148,-0.052825928,0.010673523,-0.03338623,0.0181427,-0.02267456,0.0053138733,-0.022705078,0.026870728,-0.009521484,0.0024471283,0.008224487,0.01776123,0.020889282,0.009361267,0.016830444,-0.02645874,-0.038391113,-0.025405884,0.0037117004,-0.012710571,0.020004272,0.0023345947,0.021881104,0.018615723,0.0049972534,-0.00034165382,-0.0037117004,-0.010421753,-0.006706238,-0.01927185,-0.019363403,0.0149002075,0.011581421,-0.012817383,-0.01852417,0.048858643,-0.021560669,-0.01448822,0.027023315,0.050720215,0.0154418945,0.03668213,-0.020095825,0.0011777878,-0.016067505,0.008377075,-0.022460938,0.00065898895,0.0135650635,0.013031006,-0.0033912659,0.0015325546,0.023712158,-0.0031528473,-0.006767273,0.027679443,0.01033783,-0.0074691772,0.028930664,0.004386902,0.001578331,-0.013946533,-0.010887146,0.023803711,0.047851562,0.021102905,0.012123108,-0.014305115,0.008171082,-0.01625061,0.010536194,0.017196655,-0.03161621,-0.035095215,-0.019210815,-0.032196045,0.022537231,-0.0056266785,0.009246826,-0.0017700195,0.031951904,-0.015609741,-0.019805908,-0.0146102905,0.012504578,0.014762878,-0.010696411,-0.0065956116,0.0076789856,0.020584106,-0.0309906,-0.008094788,-0.029510498,-0.030899048,-0.008430481,-0.029724121,0.020370483,0.0143966675,-0.008613586,-0.0017585754,-0.00774765,0.0025081635,-0.00015854836,0.02168274,-0.013175964,-0.0062713623,0.024520874,0.019927979,-0.01789856,0.020736694,-0.006450653,-0.003124237,0.008956909,-0.013214111,0.0069084167,-0.014122009,0.03781128,-0.008720398,0.0075798035,0.04107666,-0.008544922,0.014221191,-0.030014038,0.004901886,-0.0041999817,-0.0146865845,0.039398193,-0.024856567,-0.026550293,0.0069007874,-0.015319824,-0.040985107,0.00034165382,0.019561768,0.0262146,-0.017364502,0.05911255,-0.00730896,-0.012374878,0.01939392,0.013061523,-0.003944397,0.013877869,0.025604248,0.007858276,-0.0012397766,-0.011924744,-0.0023212433,-0.026885986,-0.0032024384,0.01789856,-0.006038666,-0.0058174133,0.033966064,0.001329422,0.046966553,-0.011787415,0.017349243,0.012840271,-0.0036754608,0.024505615,0.018936157,0.06488037,-0.019714355,-0.029556274,0.00844574,0.0011663437,-0.032714844,-0.0073165894,-0.0127334595,0.0013589859,-0.03543091,0.017120361,-0.004951477,0.006801605,-0.027450562,0.0060310364,-0.023864746,0.0032615662,-0.047668457,-0.016174316,-0.030090332,0.011199951,0.0335083,0.0018720627,0.034210205,0.0069618225,-0.019378662,0.016937256,0.04824829,0.008110046,-0.034973145,-0.015792847,0.017059326,0.0060806274,0.007007599,0.009475708,-0.029693604,-0.027053833,0.0033359528,-0.0032958984,0.018417358,-0.004272461,0.027740479,0.017181396,0.00048708916,-0.0021381378,0.015586853,-0.0061531067,-0.000016391277,0.016708374,0.004776001,0.043304443,0.029159546,-0.016677856,0.01739502,0.012229919,-0.032958984,0.054016113,0.0013237,0.023345947,-0.024230957,0.010391235,-0.033966064,-0.022888184,-0.0077934265,0.008453369],"createdAt":"2026-04-18T18:52:08.057Z","updatedAt":"2026-04-22T15:01:45.091Z","lastSeenAt":"2026-04-22T15:01:45.091Z","tsv":"'/api':182 '/api/v1/policies/56':94,218 '/docs':180 '/pricing':181 '/readme':183 '/request':13,28 '0.02':12,27,62,127,174 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':136 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':120 '20':113 '300':139 '6':123 'access':100,226 'account':74 'across':45 'actual':197 'addit':148 'address':135 'advertis':109,147 'ai/ml':48 'analysi':152 'analyt':47 'api':5,20,37,72,99,225 'application/json':103 'asset':119 'attach':82 'base':8,23,69,115 'base network api' 'base-network' 'behavior':198 'behind':216 'beyond':236 'call':4,19,129 'caller':80 'challeng':108,239 'classif':155 'connect':188 'content':194 'convers':167 'crawl':211 'crypto api payment' 'data':46 'decim':124 'detail':233 'document':178 'embed':156 'enabl':36 'endpoint':44,55,92,149,206 'equat':125 'estim':164 'exact':214 'exchang':159 'feed':158 'finance/web3':50 'format':203 'function':215 'gas':163 'generat':169 'generic':228 'geocod':165 'header':86 'howev':177 'infer':49 'infrastructur':52 'input':199 'input/output':231 'json-api' 'key':73 'land':145 'limit':77 'list':96 'lowpaymentfee' 'lowpaymentfee.com':31 'materi':212 'maxamountrequir':111 'metadata':240 'micropayment api' 'name':223 'network':9,24,70 'no-api-key' 'no-rate-limit' 'offer':40 'page':146,179 'path':219 'pay':2,17,58 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':57 'payment':85,131 'per':3,18,59,128 'platform':6,21,38,143 'point':176 'post':105 'premium':98,224 'price':157,175 'prompt':190 'provid':235 'quot':162 'rate':76,160 'request':60,89 'requir':79 'respons':202 'return':102,185 'schema':200,232 'second':140 'sent':133 'sentiment':151 'settl':64 'simpli':81 'specif':91 'substant':193 'summar':154 'text':153 'timeout':141 'token':161 'unclear':221 'undocu':208 'unit':116 'usdc':15,30,66,118 'usdc api' 'usdc-settlement' 'util':53 'valid':166 'varieti':42 'via':10,25,104 'wallet':189 'x402':11,26,35,84,107,238 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"58996fd3-13f7-421f-a097-90c33bfad2bc","listingId":"8d789383-df85-4cdb-9b56-df3df0ef62be","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/policies/56","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:08.057Z"}],"sources":[{"listingId":"8d789383-df85-4cdb-9b56-df3df0ef62be","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/56","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:08.057Z","lastSeenAt":"2026-04-22T15:01:45.091Z"}],"details":{"listingId":"8d789383-df85-4cdb-9b56-df3df0ef62be","quickStartSnippet":"# The endpoint requires an x402 payment header with USDC on Base.\n# First, probe for the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/policies/56\n# Then attach a valid X-PAYMENT header per x402 spec:\ncurl -X POST https://lowpaymentfee.com/api/v1/policies/56 \\\n  -H \"X-PAYMENT: <signed-x402-payment-payload>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equating to $0.02","source_url":"https://lowpaymentfee.com/api/v1/policies/56"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","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 protocol","Paying for API access in USDC on Base L2 with no subscription commitment"],"bestFor":["Agents or developers who want frictionless pay-per-call API access","x402-compatible clients that can attach payment headers automatically","Users who prefer crypto micropayments over traditional API billing"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who want bulk pricing or subscription discounts","Developers who cannot transact in USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.1Z"},"updatedAt":"2026-04-22T15:01:45.091Z"}}