{"id":"de038ab4-84d8-4177-8119-7827fadf9c38","shortId":"b2wq66","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/charges/284` is labeled \"Premium API Access\" and accepts POST requests. It returns a standard x402 challenge requiring an exact payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — access is gated purely by per-call micropayment.\n\nDocumentation is extremely sparse. The docs, API, 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 data this particular charge endpoint actually returns. The site's landing page lists many endpoint paths but provides no detail on input parameters or response formats. Without additional documentation it is unclear what payload to send or what response to expect from `/api/v1/charges/284` specifically.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-gateway","payments"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","low payment fee API","crypto API access"],"warnings":["No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific purpose of /api/v1/charges/284 ('Premium API Access') is undefined — it is unclear what data or service it provides","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/284","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/charges/284","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, documentation is essentially nonexistent — all doc/pricing/README pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint does beyond the generic label 'Premium API Access'. The listing is effectively a stub.","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":"2026-04-19T03:45:48.930Z","embedding":[-0.0178833,-0.04055786,0.0340271,0.01977539,0.007293701,-0.03286743,-0.027832031,0.031280518,0.06970215,-0.06689453,0.031341553,-0.034851074,-0.02017212,-0.03363037,-0.027770996,0.0054244995,-0.013366699,0.0035514832,-0.04043579,0.026809692,0.027862549,-0.025131226,-0.011703491,0.042999268,0.0047073364,-0.034698486,-0.013168335,-0.018417358,-0.018463135,-0.03543091,0.020339966,-0.024429321,-0.00592041,0.012374878,-0.015266418,-0.018493652,-0.016677856,0.02909851,0.036865234,-0.0064697266,-0.004753113,-0.06573486,0.0031604767,-0.0055999756,-0.051940918,-0.012825012,0.011726379,-0.005634308,-0.0028190613,0.00491333,-0.037200928,-0.0023880005,-0.013648987,0.004501343,0.007751465,0.01713562,-0.006286621,-0.005569458,0.006324768,0.01576233,-0.0045166016,-0.07330322,-0.005886078,-0.0071144104,-0.006450653,0.05529785,-0.010910034,0.052368164,0.010223389,0.055541992,0.048309326,0.051605225,0.035125732,0.015914917,0.0018939972,-0.0043258667,0.0032520294,0.055389404,-0.01776123,-0.000024855137,-0.026290894,0.00003385544,-0.047027588,-0.005519867,-0.020812988,-0.04171753,-0.017578125,0.018707275,-0.021316528,0.022003174,-0.07110596,-0.0015106201,-0.023086548,0.0060691833,0.0072135925,0.003692627,-0.013221741,0.033050537,-0.01108551,0.015640259,0.013122559,-0.040008545,0.006038666,0.012046814,0.049072266,0.046539307,0.024658203,0.035064697,0.00078105927,-0.020858765,-0.016815186,0.02130127,-0.022537231,-0.019638062,0.01235199,0.01612854,-0.009597778,0.02381897,-0.032958984,0.013435364,-0.056121826,0.035980225,0.03189087,-0.01411438,0.027008057,-0.04525757,-0.015296936,0.010749817,-0.031204224,-0.010269165,0.0262146,0.012863159,0.035736084,-0.02935791,-0.01979065,-0.0041007996,-0.022720337,-0.024749756,-0.047576904,-0.02670288,0.036102295,-0.021194458,0.033843994,0.035736084,-0.08758545,-0.009048462,-0.04937744,0.010040283,-0.03378296,-0.009254456,-0.004840851,0.026153564,-0.014282227,-0.013587952,-0.020431519,-0.021072388,-0.0050354004,0.030731201,-0.028411865,0.04284668,-0.01058197,0.033294678,0.009315491,0.0009851456,0.027908325,0.03741455,-0.007396698,-0.06756592,-0.08441162,-0.03201294,-0.011741638,-0.022964478,-0.03942871,-0.014984131,-0.0035381317,-0.06652832,-0.023345947,-0.018432617,-0.007396698,-0.035339355,-0.0112838745,-0.020980835,0.018722534,-0.008476257,-0.07409668,-0.018722534,-0.016433716,0.06921387,0.025543213,0.01272583,0.02180481,-0.015960693,0.060760498,0.01586914,-0.029647827,-0.026412964,0.028015137,-0.011741638,0.029724121,0.0051460266,-0.0022659302,-0.039367676,0.03479004,0.05822754,0.024215698,-0.031143188,-0.0035152435,-0.055755615,-0.03768921,-0.046051025,0.012062073,0.007484436,0.0021343231,0.035827637,-0.03878784,-0.04208374,-0.0038070679,0.010650635,0.012130737,0.04626465,0.018753052,-0.004497528,0.007156372,0.007980347,-0.036376953,0.040649414,0.027938843,0.0069236755,-0.013214111,-0.02104187,0.019729614,0.027359009,-0.034423828,0.0064430237,-0.0262146,0.023895264,0.011108398,0.022277832,0.032104492,-0.013122559,-0.016647339,-0.016525269,-0.0064582825,0.025405884,0.004272461,-0.031402588,-0.043151855,-0.07611084,0.05545044,0.030960083,0.049072266,0.0027332306,0.009315491,-0.023956299,-0.009147644,-0.066467285,0.058013916,0.07977295,-0.008544922,-0.01777649,0.0017738342,-0.013168335,-0.030700684,-0.0078048706,-0.006690979,-0.03363037,-0.02986145,0.013549805,-0.0413208,0.0030651093,0.016082764,0.019943237,0.0680542,-0.003194809,-0.04916382,-0.031402588,-0.0022392273,0.0037555695,-0.017593384,-0.0024414062,-0.02178955,0.021240234,0.014755249,-0.0039634705,0.023803711,0.0035476685,0.017852783,-0.0154953,-0.0059661865,-0.02180481,-0.026687622,0.0015935898,-0.020339966,-0.064208984,0.0017604828,0.0035934448,0.061920166,-0.045135498,0.04421997,-0.006778717,-0.0107803345,0.06488037,-0.009017944,-0.048858643,0.007396698,0.019989014,0.021087646,0.047546387,0.003698349,-0.03439331,-0.0070152283,0.08276367,-0.021224976,-0.0033626556,0.0121536255,0.015914917,0.020767212,0.0030612946,-0.058441162,-0.047424316,-0.011024475,-0.033569336,0.027679443,-0.029464722,0.030639648,-0.01776123,0.00712204,-0.017410278,-0.005214691,-0.027801514,0.016647339,-0.030593872,0.008026123,-0.022262573,-0.013824463,0.019226074,0.008323669,-0.02128601,0.010383606,0.04736328,0.03466797,-0.01322937,-0.037506104,-0.011238098,-0.008071899,-0.0028305054,0.022155762,0.028274536,0.028060913,0.045684814,-0.03845215,0.02772522,0.035583496,0.006969452,0.031921387,-0.01586914,0.0042152405,-0.06390381,-0.058288574,-0.02432251,-0.042785645,0.033447266,0.0146102905,-0.011711121,0.049316406,0.013931274,-0.016433716,-0.041900635,0.02281189,-0.051635742,-0.009757996,0.033325195,-0.008605957,-0.042388916,-0.016281128,0.0054244995,-0.0031280518,0.027618408,0.016860962,0.0014381409,0.059020996,0.036010742,-0.002708435,0.034088135,0.017044067,0.024765015,0.0016918182,-0.03488159,-0.028671265,-0.0067481995,0.022384644,-0.013877869,-0.02319336,-0.06414795,0.055145264,0.04333496,0.08630371,0.02180481,0.011367798,0.028930664,-0.0063591003,0.008651733,-0.021530151,-0.016113281,-0.028778076,-0.056610107,0.032104492,-0.012893677,-0.010475159,-0.015403748,0.04397583,-0.001074791,0.018341064,-0.039916992,0.05859375,-0.0056495667,-0.010322571,0.023712158,0.012649536,0.04260254,0.06347656,-0.041809082,0.02670288,0.03173828,-0.04006958,0.009628296,0.058776855,-0.010253906,-0.0003376007,-0.06124878,-0.012634277,-0.0000141859055,-0.015113831,-0.053833008,-0.007423401,0.004348755,0.01574707,0.025177002,-0.013000488,-0.0335083,-0.003129959,-0.027435303,-0.057037354,-0.00705719,-0.04046631,0.010803223,0.05041504,-0.031143188,-0.0015497208,0.0050964355,-0.014442444,-0.009628296,0.0019607544,0.022109985,-0.0032672882,-0.048858643,0.02583313,0.0059432983,0.006450653,0.002960205,0.046875,0.023803711,0.02798462,0.056243896,0.00630188,-0.027862549,-0.05706787,0.03289795,-0.050598145,0.017486572,0.01436615,-0.021865845,-0.017807007,-0.01751709,-0.018127441,-0.035339355,0.0025100708,-0.027648926,0.0004954338,0.01713562,-0.020751953,-0.031097412,-0.05441284,-0.017166138,-0.012809753,0.06915283,0.022476196,-0.008422852,-0.068359375,-0.008483887,0.020248413,0.010017395,0.008323669,-0.014793396,-0.010307312,0.000992775,-0.038757324,-0.0058898926,-0.0115737915,0.01838684,-0.005584717,-0.007331848,0.040100098,-0.00014925003,0.008880615,-0.0026474,0.015823364,0.04220581,-0.030776978,-0.010261536,-0.02809143,0.032104492,-0.0068511963,-0.011886597,-0.04550171,0.034210205,0.016815186,0.032806396,-0.026062012,-0.0011520386,-0.004108429,0.01789856,0.021087646,-0.006580353,-0.006713867,-0.00029540062,-0.049560547,-0.06323242,0.031173706,-0.029220581,0.026306152,0.015296936,0.0036697388,0.02746582,-0.0046691895,0.005203247,0.024963379,-0.029937744,-0.018859863,-0.02003479,-0.034210205,-0.008361816,-0.005218506,-0.023391724,0.02720642,-0.019454956,0.017089844,-0.0001322031,-0.014335632,0.020980835,-0.0005669594,0.00037431717,0.014205933,-0.0060272217,0.016815186,0.04397583,0.012161255,-0.040771484,0.029510498,0.002729416,0.008071899,-0.012145996,0.039916992,0.025024414,-0.0110321045,-0.0057678223,-0.010612488,-0.012748718,-0.016082764,-0.0068855286,0.0146484375,0.022247314,-0.004840851,-0.04296875,0.029464722,0.007713318,-0.030059814,-0.0069389343,0.02558899,0.020324707,-0.030166626,0.029769897,0.025466919,0.06677246,-0.013534546,0.0014162064,0.010498047,0.026535034,0.028823853,0.013420105,-0.013160706,0.018432617,-0.005619049,0.018325806,-0.0132369995,0.0016937256,0.015792847,0.0042304993,0.024490356,0.024993896,0.0063552856,-0.01940918,-0.028884888,0.018173218,-0.012680054,-0.018432617,0.020812988,0.028167725,0.021774292,-0.024337769,0.02381897,0.019104004,-0.029907227,-0.022766113,0.012321472,0.043029785,-0.020431519,-0.018875122,0.010246277,0.005393982,0.029510498,-0.055725098,0.0006837845,0.015701294,0.010612488,-0.024963379,-0.03842163,-0.03286743,0.018173218,0.03250122,0.0019435883,0.018981934,0.03125,0.0059661865,0.004798889,0.020492554,0.007648468,-0.013519287,-0.0096588135,-0.035369873,-0.0041885376,-0.012840271,-0.001200676,-0.020202637,0.01159668,-0.019180298,-0.035186768,0.009140015,-0.019683838,-0.0059165955,-0.0003142357,0.023895264,0.032684326,-0.0054473877,0.00687027,-0.018310547,-0.017242432,0.0012083054,-0.0076141357,0.017028809,-0.047790527,0.0046577454,-0.014663696,-0.0028934479,0.005168915,0.007205963,0.019714355,0.022125244,-0.0006661415,0.023284912,-0.032684326,0.04043579,-0.041870117,0.01966858,0.00217247,-0.03778076,-0.006904602,-0.0152282715,-0.016281128,0.030929565,-0.01701355,-0.010871887,-0.018371582,-0.036346436,-0.0031166077,-0.050079346,0.026229858,0.033050537,0.03933716,-0.017669678,0.0008482933,-0.004299164,-0.00598526,-0.018920898,0.007221222,-0.015655518,0.019638062,0.008361816,0.016586304,-0.02848816,-0.01209259,-0.021011353,0.0077590942,-0.045135498,-0.041534424,-0.019073486,0.005970001,-0.019241333,-0.00983429,-0.034362793,-0.021438599,0.0012521744,-0.04827881,0.015640259,0.0038528442,0.023971558,0.0010242462,-0.008529663,-0.010795593,0.016906738,-0.012580872,0.034729004,0.0012512207,-0.01033783,-0.02961731,-0.009407043,0.03652954,0.026626587,0.0034427643,-0.015548706,-0.0061798096,-0.009284973,-0.04736328,-0.0037326813,-0.012062073,-0.0004553795,-0.0010404587,0.0068969727,-0.04699707,-0.00217247,-0.018844604,0.0042533875,0.029571533,0.011314392,0.01789856,-0.0026836395,0.0023536682,-0.004386902,-0.021957397,-0.030166626,0.021865845,0.010887146,-0.00030183792,0.008422852,0.04147339,0.004798889,-0.0055885315,0.0030441284,-0.0035915375,0.016906738,-0.030044556,0.006641388,-0.019638062,0.009399414,-0.022140503,-0.0020313263,-0.02645874,-0.008323669,0.09008789,-0.0010681152,-0.0129852295,-0.010559082,-0.03289795,0.016525269,0.0146102905,-0.054656982,-0.0040245056,-0.04006958,0.013084412,-0.024810791,0.018447876,0.00043654442,0.018722534,-0.03567505,-0.067993164,-0.014411926,0.0072669983,-0.01828003,-0.0657959,-0.012031555,-0.06524658,-0.0070152283,-0.0015707016,-0.013183594,0.004131317,0.007965088,-0.016464233,-0.089416504,0.007259369,0.044433594,0.014221191,0.021209717,-0.01398468,0.01876831,0.019714355,-0.020874023,-0.0068855286,0.02670288,-0.014587402,-0.014297485,-0.019058228,0.017074585,-0.018569946,-0.01424408,0.027328491,0.007701874,0.020019531,-0.004016876,0.01234436,-0.015205383,0.01586914,-0.008575439,0.015258789,-0.011505127,-0.0028076172,0.044830322,-0.049926758,0.029586792,0.036010742,0.004020691,0.00052404404,0.02520752,0.03277588,-0.034973145,-0.018356323,0.023117065,0.0041618347,0.044403076,-0.033813477,0.043151855,0.022338867,-0.014533997,0.015609741,-0.0037384033,-0.022354126,-0.034423828,-0.032104492,0.025100708,0.013389587,0.018325806,-0.011276245,0.0063095093,0.005657196,-0.019042969,0.017974854,-0.0085372925,-0.017242432,-0.012863159,0.0010738373,0.0005059242,0.008354187,-0.014785767,0.027297974,0.012992859,0.036468506,-0.0025501251,-0.006465912,0.0004184246,0.020935059,-0.02166748,0.015823364,0.013847351,0.00705719,0.024520874,0.008758545,0.004650116,-0.036987305,-0.015808105,-0.021133423,0.0020103455,0.0034828186,-0.0062675476,-0.006778717,0.0024299622,0.0049209595,-0.0059051514,-0.03024292,0.0072517395,-0.030303955,-0.023590088,-0.006893158,-0.015312195,0.018051147,0.0048561096,0.003967285,0.016525269,0.003030777,0.059387207,-0.005405426,-0.0028038025,0.023529053,0.036956787,0.022018433,-0.030349731,-0.014785767,-0.008285522,0.006919861,-0.0022697449,-0.022735596,0.01625061,0.041534424,-0.010498047,0.01612854,-0.0025901794,0.027862549,-0.009895325,0.013168335,-0.01210022,0.020706177,-0.0031032562,0.029571533,-0.0440979,0.01928711,0.020965576,-0.00440979,-0.007850647,-0.02331543,-0.020736694,0.01386261,0.014785767,-0.014297485,0.047607422,-0.0023994446,0.024932861,-0.023406982,-0.021102905,0.01171875,-0.034606934,-0.0154800415,0.039001465,-0.005290985,-0.00472641,0.017242432,-0.03604126,0.031402588,-0.034606934,0.021224976,-0.00579834,0.0023078918,-0.0079193115,-0.018447876,-0.024093628,-0.019973755,-0.013771057,0.010818481,-0.0025310516,0.043121338,0.013389587,0.040618896,0.049957275,0.014785767,0.0040779114,-0.032104492,-0.021972656,-0.006500244,-0.030929565,0.011016846,-0.0010080338,0.047912598,0.03604126,-0.0041160583,0.03024292,0.037597656,0.032318115,0.0010604858,0.008850098,-0.013343811,-0.0010471344,-0.005180359,0.02558899,0.0044174194,0.035339355,-0.023162842,0.019577026,0.0064430237,0.033813477,-0.033050537,0.02355957,0.07696533,0.013122559,-0.015571594,0.042938232,-0.00003582239,-0.027755737,-0.016418457,-0.009643555,0.058441162,0.025466919,0.050354004,0.06311035,0.008056641,-0.013252258,0.015899658,-0.03152466,-0.033599854,0.076293945,0.026535034,-0.021316528,-0.020629883,-0.007419586,0.006401062,-0.04296875,-0.032287598,0.011459351,-0.014755249,0.00983429,-0.012641907,-0.006931305,-0.018997192,0.019989014,0.026870728,0.0152282715,-0.017486572,0.016525269,0.033599854,0.0035247803,0.023635864,-0.00027179718,0.013557434,-0.025497437,-0.019424438,0.014572144,0.022369385,-0.0181427,-0.017105103,0.021102905,0.0079956055,0.05026245,0.037750244,-0.00541687,0.0024261475,0.024841309,0.021743774,-0.006866455,0.05026245,0.040405273,0.014518738,0.036071777,0.03427124,0.032592773,-0.031143188,0.019012451,0.006462097,0.01576233,0.00340271,-0.008583069,0.008102417,-0.0149002075,0.012680054,-0.0065193176,-0.019729614,0.02368164,0.027938843,-0.008270264,-0.008773804,-0.01499176,0.007835388,-0.016921997,-0.002937317,0.011917114,-0.017715454,0.03274536,0.0077056885,0.025680542,-0.03793335,0.021560669,-0.010009766,-0.019958496,-0.0071868896,0.01701355,-0.04800415,0.006084442,0.00038981438,-0.0030174255,-0.03225708,0.013572693,0.026885986,-0.008285522,0.027542114,0.010597229,0.0039405823,0.006706238,0.0129776,0.009765625,-0.0022220612,-0.012779236,-0.021362305,0.040374756,0.03967285,0.00023937225,0.012374878,-0.020095825,-0.006275177,-0.0022449493,0.002073288,-0.002746582,-0.0022029877,-0.028884888,-0.03286743,0.015899658,0.040161133,0.026489258,0.032958984,-0.011123657,-0.030410767,0.0090408325,0.02671814,0.004005432,0.0018777847,-0.005332947,0.01663208,-0.011169434,0.050201416,0.02330017,0.0037059784,0.030822754,-0.012969971,-0.021835327,0.01751709,-0.015098572,0.0395813,-0.01197052,0.0085372925,-0.01473999,0.02130127,-0.01399231,-0.025009155,0.012588501,-0.015945435,-0.016052246,-0.024276733,-0.0068969727,0.008125305,0.020950317,0.032196045,0.015388489,-0.028381348,0.06774902,-0.010772705,0.0597229,-0.009689331,-0.0048980713,0.05090332,0.036132812,0.041503906,0.015625,0.0075683594,-0.03048706,0.019882202,0.0390625,0.029251099,0.005142212,0.0007367134,-0.008277893,0.03640747,0.0062217712,0.028167725,-0.009757996,-0.004585266,0.00497818,-0.011070251,-0.013519287,0.004825592,-0.013549805,0.0103302,0.043182373,-0.023727417,-0.009376526,-0.02848816,-0.013450623,0.02748108,-0.007369995,0.0011577606,0.00024461746,-0.018127441,0.015609741,-0.025466919,-0.01890564,0.010810852,0.025863647,-0.043304443,-0.025024414,0.0052261353,0.010902405,-0.015533447,0.039764404,0.03390503,-0.0015859604,-0.00009584427,0.03768921,-0.00944519,0.028305054,-0.005622864,0.02017212,0.028533936,0.010360718,-0.012550354,0.0047340393,0.003255844,-0.012054443,0.013877869,0.0435791,-0.007183075,0.0046310425,0.0013828278,-0.027832031,0.0037841797,-0.0075302124,-0.017044067,0.0032749176,-0.0052948,-0.017807007,0.006454468,0.0066070557,0.0018186569,0.0063095093,-0.028533936,-0.009361267,0.0051612854,0.032287598,0.023010254,-0.0423584,-0.0066986084,0.003583908,0.0054359436,-0.025054932,-0.023010254,-0.006008148,-0.03262329,0.013641357,0.017608643,0.007358551,0.012931824,-0.014007568,-0.0020179749,0.032287598,0.008987427,0.023910522,0.005130768,-0.0050468445,0.012336731,-0.015083313,-0.005012512,-0.004432678,-0.017105103,0.006275177,0.0124053955,0.0005531311,-0.028060913,0.026489258,0.0027389526,0.01663208,0.0016946793,-0.01512146,0.019485474,-0.01651001,-0.013084412,0.011398315,0.020004272,-0.013336182,-0.014122009,-0.014808655,0.0209198,0.05682373,-0.0002644062,-0.003850937,0.027877808,0.01751709,0.010795593,0.042877197,0.016342163,0.047546387,0.020721436,-0.013442993,-0.00843811,0.019622803,-0.010055542,-0.034973145,0.021102905,-0.005382538,-0.01374054,0.017105103,0.0155181885,-0.00472641,-0.022354126,-0.021865845,-0.01209259,-0.019332886,0.026168823,-0.013175964,0.0126571655,-0.025314331,-0.0044288635,0.00054597855,-0.022918701,-0.05517578,-0.021194458,-0.0038871765,-0.016723633,-0.046813965,0.0042266846,-0.03363037,0.012481689,-0.021102905,-0.016021729,-0.018615723,0.033050537,-0.01739502,-0.0032024384,0.0062713623,0.02684021,0.02520752,0.012451172,0.020645142,-0.039855957,-0.037231445,-0.023834229,-0.003917694,-0.01638794,0.020904541,0.009735107,0.038208008,0.014030457,-0.013534546,-0.00021183491,-0.0052452087,-0.001004219,-0.0064735413,-0.026062012,-0.019515991,0.01902771,0.020629883,-0.015167236,-0.019973755,0.03616333,-0.029724121,-0.0032253265,0.029678345,0.04119873,0.010223389,0.021713257,-0.014099121,-0.010932922,-0.008934021,0.0047569275,-0.02178955,0.0057754517,0.006603241,-0.0021400452,-0.0045433044,0.0023403168,0.0181427,-0.008880615,-0.018432617,0.025650024,0.00021100044,-0.023986816,0.030273438,0.01689148,0.010406494,-0.00073719025,-0.0072746277,0.017913818,0.037628174,0.015022278,0.005378723,0.0069847107,0.016555786,-0.010093689,0.010513306,0.022247314,-0.021026611,-0.046875,-0.031707764,-0.023712158,0.013557434,0.012771606,0.020126343,-0.008003235,0.02658081,-0.03262329,-0.036499023,-0.017623901,0.023742676,0.0020446777,-0.0124435425,-0.018875122,-0.0054016113,0.024536133,-0.0340271,0.0017528534,-0.03173828,-0.033813477,-0.0059165955,-0.023788452,0.025344849,0.011268616,-0.009361267,-0.0054855347,-0.008773804,-0.0014886856,0.0039634705,0.036346436,-0.019088745,-0.004016876,0.025314331,0.012710571,-0.02659607,0.012916565,-0.011138916,-0.009216309,0.017410278,-0.019729614,0.014266968,-0.016113281,0.031799316,0.0025196075,0.009513855,0.03527832,-0.0029067993,0.012512207,-0.024047852,-0.0003387928,0.0035476685,-0.011131287,0.034362793,-0.017913818,-0.017196655,0.008132935,-0.021392822,-0.031677246,0.00085163116,0.024917603,0.041503906,-0.0060043335,0.03591919,-0.024765015,-0.018005371,0.011558533,0.0040245056,-0.017288208,-0.004005432,0.033966064,0.01134491,-0.009025574,-0.0037879944,-0.01259613,-0.027328491,0.000114262104,0.022018433,0.00034308434,-0.0121154785,0.014457703,0.007843018,0.052947998,0.010643005,0.025100708,0.014717102,0.00007516146,0.02911377,0.0007638931,0.060699463,-0.0028419495,-0.04260254,0.0070114136,0.0023078918,-0.025848389,-0.011169434,-0.010726929,0.0010614395,-0.038970947,0.016113281,-0.01260376,0.03970337,-0.020828247,0.013877869,-0.029327393,-0.0033836365,-0.033721924,-0.018493652,-0.024658203,0.011253357,0.038269043,-0.0028266907,0.020828247,0.005050659,-0.025604248,0.017959595,0.043762207,-0.003566742,-0.022644043,-0.006969452,0.020706177,-0.0003848076,0.0067329407,0.012580872,-0.014770508,-0.0209198,-0.00009095669,-0.02798462,0.007484436,-0.009284973,0.018005371,-0.00039243698,0.005657196,0.0053863525,0.031677246,0.006427765,-0.0051116943,0.009895325,0.013549805,0.040008545,0.03778076,-0.016433716,0.026489258,0.020141602,-0.03765869,0.053222656,-0.004924774,0.02696228,-0.023986816,0.003206253,-0.033447266,-0.033569336,-0.005344391,0.0022220612],"createdAt":"2026-04-18T18:44:53.875Z","updatedAt":"2026-04-24T01:32:05.666Z","lastSeenAt":"2026-04-24T01:32:05.666Z","tsv":"'/api/v1/charges/284':103,247 '0.02':12,28,90,136 '000':125 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '0x8335':130 '20':124 '2913':131 '300':150 '6':140 'Base network API' 'USDC pay-per-call' 'accept':110 'access':7,23,40,108,161 'actual':210 'addit':232 'address':146 'advertis':160 'ai/ml':61 'analysi':64 'analyt':60 'api':6,22,39,57,107,154,176 'base':9,25,98,126,133 'base-network' 'broad':50 'call':4,20,168 'catalog':51 'challeng':118 'charg':208 'classif':66 'connect':185 'content':191 'convers':83 'crypto API access' 'data':59,205 'decim':141 'descript':202 'detail':224 'doc':175 'document':170,233 'embed':67 'endpoint':34,86,102,209,219 'equal':135 'estim':77 'exact':121 'exampl':199 'exchang':72 'expect':245 'extrem':172 'feed':71 'financ':68 'format':230 'gas':76 'gate':163 'generat':84 'geocod':81 'given':137 'host':48 'infer':62 'infrastructur':79 'input':226 'key':155 'label':105 'land':215 'limit':158 'list':217 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':36 'mani':218 'micropay':169 'micropayment API' 'network':99 'no-api-key' 'openapi':195 'page':180,216 'paramet':227 'particular':207 'path':220 'pay':2,18,54 'pay-per-cal':1,17 'pay-per-request':53 'payload':238 'payment':44,122,142 'per':3,13,19,29,55,91,167 'per-cal':166 'post':111 'post-endpoint' 'premium':5,21,38,106 'price':70,88,177 'prompt':187 'protocol':45 'provid':37,222 'pure':164 'quot':75 'rate':73,157 'readm':179 'render':182 'request':14,30,56,92,112 'request/response':198 'requir':119 'respons':229,243 'return':114,211 'schema':196 'second':151 'send':240 'sent':144 'sentiment':63 'settl':93 'site':47,213 'span':58 'spars':173 'specif':101,248 'standard':116 'summar':65 'timeout':152 'token':74 'unclear':236 'unit':127 'usdc':16,32,95,129,138 'usdc-micropayment' 'util':80 'valid':82 'via':10,26,41 'wallet':186 'web3':69 'without':231 'x402':11,27,43,117 'x402 API' 'x402-payment'","prices":[{"id":"db03aefa-fe87-4896-8e46-e361e307533d","listingId":"de038ab4-84d8-4177-8119-7827fadf9c38","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/charges/284","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:53.875Z"}],"sources":[{"listingId":"de038ab4-84d8-4177-8119-7827fadf9c38","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/284","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:53.875Z","lastSeenAt":"2026-04-24T01:32:05.666Z"}],"details":{"listingId":"de038ab4-84d8-4177-8119-7827fadf9c38","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/284 \\\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":"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 (USD Coin) on Base with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/charges/284"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/284"},{"claim":"Site lists APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium data or services with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Integrating pay-as-you-go endpoints into automated workflows on Base"],"bestFor":["Developers wanting keyless, pay-per-request API access","AI agents that can settle x402 micropayments in USDC on Base","Projects needing low-friction API consumption without subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Applications requiring fiat-only payment rails with no crypto wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:23.079Z"},"updatedAt":"2026-04-24T01:32:05.666Z"}}