{"id":"e655d30a-f108-411d-94f8-8835f834d3b0","shortId":"mtZgMk","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall on the Base network. The specific resource at `/api/v1/charges/29` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC (USD Coin) on Base with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments via the \"exact\" scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. The response MIME type is `application/json`. The timeout for payment is 300 seconds.\n\nHowever, the specific functionality behind `/api/v1/charges/29` is not documented beyond the label \"Premium API Access.\" The provider's landing page lists many other endpoints with descriptive names (sentiment analysis, geocoding, price feeds, etc.), but this particular path does not appear in those listings. No OpenAPI schema, request/response examples, or detailed documentation were found. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api","infrastructure"],"synonyms":["premium API","paid API access","x402 endpoint","USDC API","Base network API","micropayment API","lowpaymentfee"],"warnings":["The specific functionality of /api/v1/charges/29 ('Premium API Access') is not described anywhere in the crawled content.","No OpenAPI spec, request schema, or response schema available.","All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no useful content.","This endpoint path does not appear in the provider's listed API catalog on the landing page."],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/29","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/29","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 with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/charges/29 is undefined. The docs pages are empty beyond a wallet connect prompt.","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":"2026-04-19T03:46:44.293Z","embedding":[-0.019927979,-0.02696228,0.040161133,0.018203735,0.018234253,-0.03491211,-0.021438599,0.03665161,0.0703125,-0.0703125,0.025405884,-0.032836914,-0.037109375,-0.039642334,-0.02986145,0.011039734,-0.0067749023,0.013618469,-0.05734253,0.058441162,0.03491211,-0.014961243,-0.012626648,0.044952393,-0.0036296844,-0.023635864,-0.00315094,-0.023910522,-0.014442444,-0.02281189,0.021377563,-0.018218994,-0.00047588348,0.017578125,-0.006965637,-0.005191803,-0.015556335,0.05038452,0.026992798,-0.0059013367,0.0049705505,-0.062683105,0.0011177063,-0.0066452026,-0.045410156,-0.0067634583,0.0051460266,-0.023223877,-0.02909851,0.011817932,-0.027038574,0.006378174,-0.02796936,-0.003200531,0.009048462,0.0028820038,-0.011459351,-0.0010433197,0.005695343,0.0011453629,0.0022621155,-0.06604004,-0.025894165,0.008056641,0.0013313293,0.052490234,-0.007896423,0.046813965,0.0047302246,0.06744385,0.04498291,0.055725098,0.056640625,0.016677856,-0.0018930435,-0.002418518,0.002090454,0.051879883,-0.016220093,0.0061683655,-0.01953125,-0.0038337708,-0.045898438,-0.012451172,-0.020706177,-0.048675537,-0.025146484,0.026473999,-0.026428223,0.023742676,-0.062683105,-0.00083732605,-0.016616821,0.018997192,-0.0035266876,0.00084400177,-0.025848389,0.019958496,-0.0116119385,0.021148682,0.011497498,-0.043823242,0.009857178,0.020202637,0.057647705,0.0440979,0.029067993,0.02670288,-0.014076233,-0.031677246,-0.01499939,0.022033691,-0.021316528,-0.012870789,0.019226074,0.01776123,-0.024047852,0.027160645,-0.02381897,0.017288208,-0.05899048,0.04824829,0.025497437,-0.0289917,0.02218628,-0.036224365,-0.018951416,0.0005850792,-0.042663574,-0.024917603,0.027435303,0.017684937,0.036254883,-0.025024414,-0.010795593,-0.003786087,-0.013198853,-0.034454346,-0.062683105,-0.021759033,0.029830933,-0.031921387,0.041534424,0.03857422,-0.08538818,-0.016311646,-0.04660034,0.0002965927,-0.04034424,-0.00894928,-0.0063095093,0.020050049,-0.020721436,-0.0034103394,-0.01663208,-0.016616821,-0.011695862,0.02911377,-0.019943237,0.034088135,-0.015571594,0.027923584,0.009727478,-0.0013990402,0.032958984,0.03463745,-0.0035266876,-0.08496094,-0.085876465,-0.032043457,-0.0043640137,-0.015625,-0.04623413,-0.009635925,0.0009832382,-0.08117676,-0.038604736,-0.0023880005,0.008163452,-0.032196045,-0.0084991455,-0.024291992,0.009994507,-0.009468079,-0.061767578,-0.015670776,-0.019561768,0.07354736,0.022369385,-0.00066947937,0.025604248,-0.025222778,0.062683105,0.012031555,-0.03463745,-0.04498291,0.033203125,-0.019042969,0.026107788,0.010307312,-0.007965088,-0.028503418,0.040802002,0.046539307,0.01184082,-0.0056610107,0.010902405,-0.044555664,-0.029541016,-0.04095459,0.011482239,0.005455017,-0.0010194778,0.01687622,-0.030685425,-0.041015625,-0.013946533,-0.003932953,0.018249512,0.047058105,0.0026550293,0.0065612793,-0.005264282,0.012306213,-0.01991272,0.04336548,0.029708862,0.017929077,-0.031066895,-0.012077332,0.023010254,0.031097412,-0.03387451,0.0019989014,-0.019683838,0.017822266,0.011398315,0.010635376,0.033813477,-0.017745972,-0.030960083,-0.027328491,0.0046310425,0.028396606,0.020690918,-0.032318115,-0.056793213,-0.076538086,0.039215088,0.05307007,0.019592285,0.007347107,0.004573822,-0.032562256,-0.010543823,-0.06616211,0.055633545,0.087524414,-0.013198853,-0.028030396,0.018615723,-0.022232056,-0.026794434,-0.018615723,0.009490967,-0.021560669,-0.0039596558,0.006149292,-0.04156494,-0.0020256042,0.0079422,0.030639648,0.0690918,-0.028076172,-0.050720215,-0.026824951,0.01398468,0.003786087,-0.027816772,-0.0028457642,0.0018978119,0.01663208,0.027191162,0.0011005402,0.022949219,0.008163452,0.027389526,-0.005924225,-0.019302368,-0.023529053,-0.014732361,0.003753662,-0.0087890625,-0.054107666,0.020355225,0.007980347,0.048339844,-0.034454346,0.052459717,0.009643555,0.009346008,0.058502197,-0.004776001,-0.04248047,0.009338379,0.032592773,0.04067993,0.043792725,0.018005371,-0.00983429,-0.006427765,0.0625,-0.009475708,0.0070724487,0.0054092407,0.019348145,0.032684326,0.0011062622,-0.067871094,-0.03555298,-0.012268066,-0.026916504,0.021865845,-0.02508545,0.033203125,-0.011924744,0.011985779,-0.017654419,0.0026569366,-0.047729492,0.0014638901,-0.031463623,0.007980347,-0.012428284,-0.029678345,0.022140503,0.010795593,-0.02015686,0.0038471222,0.042938232,0.020309448,-0.013961792,-0.031707764,-0.008300781,-0.022598267,0.0053863525,0.031341553,0.02810669,0.01737976,0.030044556,-0.04473877,0.021896362,0.01914978,0.0112838745,0.041168213,-0.015548706,0.011978149,-0.048980713,-0.049346924,-0.019989014,-0.042053223,0.039031982,0.010169983,0.008277893,0.046783447,0.007247925,-0.029418945,-0.03366089,0.032043457,-0.039520264,-0.0021591187,0.027267456,-0.009231567,-0.045562744,-0.007091522,0.0046424866,0.014877319,0.030426025,0.00995636,0.0019760132,0.06137085,0.039794922,0.0049858093,0.01727295,0.032714844,0.024230957,0.00065135956,-0.039123535,-0.02720642,0.0029697418,0.014625549,-0.022903442,-0.02720642,-0.07562256,0.03579712,0.035247803,0.079956055,0.018478394,0.009727478,0.03869629,-0.017044067,0.0045204163,-0.025009155,-0.018188477,-0.01890564,-0.030853271,0.02017212,-0.021865845,-0.00843811,-0.0368042,0.034454346,0.008560181,0.009811401,-0.0368042,0.07141113,0.008598328,-0.016708374,0.018920898,0.0053253174,0.03277588,0.051574707,-0.041229248,0.028030396,0.019073486,-0.038757324,-0.0055770874,0.049713135,-0.006752014,-0.007194519,-0.060424805,-0.02168274,0.0061073303,-0.0079193115,-0.070495605,-0.0018882751,0.011016846,0.014968872,0.008728027,-0.018875122,-0.040222168,-0.0046577454,-0.026947021,-0.0552063,-0.0015163422,-0.046203613,0.007133484,0.045684814,-0.028564453,0.00466156,0.007411957,0.0063819885,-0.0041046143,0.013160706,-0.0061187744,-0.017501831,-0.04006958,0.028671265,0.016342163,0.015655518,0.008369446,0.033050537,0.03289795,0.012771606,0.05557251,0.015426636,-0.022888184,-0.046417236,0.021484375,-0.030136108,-0.0020561218,-0.0060577393,-0.0099487305,-0.008560181,-0.015464783,-0.018859863,-0.031982422,0.0033493042,-0.014129639,0.022644043,0.022613525,-0.04977417,-0.024459839,-0.05822754,-0.015197754,-0.003320694,0.088256836,0.025115967,-0.015090942,-0.06439209,-0.017440796,0.024887085,0.004486084,-0.00018787384,-0.015357971,-0.019302368,-0.011329651,-0.029205322,-0.018707275,-0.017745972,0.029724121,-0.0013017654,-0.020187378,0.03466797,-0.007171631,0.0010318756,-0.004470825,0.007965088,0.0496521,-0.0362854,0.0008649826,-0.034942627,0.019836426,-0.00014317036,-0.0016059875,-0.046905518,0.045532227,0.011192322,0.030822754,-0.026275635,0.003030777,0.004306793,0.01537323,0.026687622,-0.016738892,-0.016342163,0.016967773,-0.039154053,-0.07623291,0.034423828,-0.019729614,0.023422241,0.002588272,0.00055885315,0.0368042,-0.0014476776,0.010406494,0.028396606,-0.02999878,-0.0065841675,-0.03338623,-0.03768921,-0.006362915,0.001502037,-0.015281677,0.018249512,-0.010971069,0.01096344,-0.008125305,-0.024642944,0.03604126,0.0029888153,-0.008224487,0.028045654,0.011734009,0.013717651,0.052337646,0.0006351471,-0.03338623,0.024536133,-0.0066604614,-0.006614685,-0.016845703,0.05227661,0.030426025,-0.018722534,-0.0079422,-0.0043792725,-0.011604309,-0.027496338,-0.017288208,0.017669678,0.039520264,0.006122589,-0.035369873,0.032226562,0.024002075,-0.035461426,-0.0014266968,0.017456055,0.023956299,-0.032562256,0.02911377,0.01991272,0.05822754,-0.021026611,-0.00070667267,0.013076782,0.01953125,0.021240234,0.014862061,-0.020828247,0.019485474,-0.017074585,0.013084412,-0.0031852722,-0.012321472,0.006263733,-0.010719299,0.007858276,0.018676758,0.024978638,-0.020446777,-0.018951416,0.0059051514,-0.0061073303,-0.01687622,0.01651001,0.014343262,0.01725769,-0.024719238,0.022506714,0.0124053955,-0.040252686,-0.019485474,-0.0019721985,0.052886963,-0.018585205,-0.008575439,0.021331787,0.0043640137,0.04345703,-0.045166016,-0.0032615662,0.01360321,0.0075187683,-0.022323608,-0.045074463,-0.029647827,0.0058059692,0.02722168,0.008796692,-0.0037593842,0.0317688,-0.00021898746,0.012145996,0.03100586,0.005844116,-0.016326904,-0.012794495,-0.051635742,-0.0035572052,-0.001411438,-0.0035572052,-0.019989014,0.011550903,-0.024459839,-0.024276733,0.0021686554,-0.0077590942,-0.012924194,0.0038604736,0.021987915,0.04083252,0.0035305023,0.0073394775,-0.015144348,-0.013053894,0.014442444,-0.0069274902,0.029541016,-0.037872314,0.023544312,-0.016418457,-0.001625061,-0.00932312,0.0020313263,0.016998291,0.01676941,0.0008749962,0.026657104,-0.035125732,0.033691406,-0.035827637,0.011199951,0.009681702,-0.046447754,0.0042686462,-0.031677246,-0.015197754,0.038482666,-0.003189087,-0.00035977364,-0.018569946,-0.021957397,-0.0003349781,-0.047698975,0.029830933,0.032470703,0.033233643,-0.026351929,0.00033402443,0.012451172,0.0032253265,-0.0090408325,0.0076942444,-0.021438599,0.019607544,0.018554688,0.009407043,-0.01991272,-0.013763428,-0.012771606,0.006412506,-0.057281494,-0.035980225,-0.027236938,0.019134521,-0.00774765,-0.009880066,-0.02999878,-0.021148682,-0.0038204193,-0.04168701,0.016098022,0.0036296844,0.020690918,0.008384705,-0.014732361,-0.0064926147,0.006023407,-0.0138549805,0.030349731,-0.009338379,-0.011512756,-0.036102295,0.0012760162,0.045562744,0.021759033,0.009391785,-0.014122009,-0.003353119,-0.035125732,-0.053894043,0.0013513565,-0.015304565,-0.0004901886,0.0010690689,0.0044822693,-0.053833008,-0.012306213,-0.025146484,-0.0035934448,0.023117065,0.015792847,0.014984131,-0.0015459061,-0.008026123,-0.014854431,-0.024108887,-0.03414917,0.020050049,0.0113220215,-0.004852295,0.0010967255,0.036987305,0.012306213,-0.009986877,0.0018396378,0.0070266724,0.017608643,-0.035461426,0.012397766,-0.009796143,0.021392822,-0.0154418945,-0.008628845,-0.026306152,-0.005290985,0.082092285,-0.004524231,-0.0048713684,-0.00042366982,-0.0104522705,0.010902405,0.018096924,-0.060058594,-0.012046814,-0.028076172,0.024597168,-0.024642944,0.015342712,0.0077934265,0.0027160645,-0.024124146,-0.06021118,-0.0072250366,0.021331787,-0.009918213,-0.058624268,-0.0074310303,-0.05923462,-0.016036987,-0.003288269,-0.013168335,0.0021438599,0.0065307617,-0.015625,-0.08215332,0.013008118,0.04736328,0.0077209473,0.010368347,-0.0289917,0.018829346,0.027191162,-0.01826477,-0.011451721,0.03186035,-0.025024414,-0.02470398,-0.018920898,0.026641846,-0.011604309,-0.025894165,0.026168823,0.017364502,0.022094727,-0.0059776306,0.00573349,-0.016403198,0.0052871704,-0.00053071976,0.011924744,-0.00198555,-0.011550903,0.019058228,-0.045837402,0.0256958,0.023025513,0.010665894,-0.0065612793,0.013259888,0.020431519,-0.044677734,-0.02468872,0.040222168,-0.0003592968,0.036102295,-0.036132812,0.045166016,0.026397705,-0.014213562,0.0105896,-0.013175964,-0.039611816,-0.046020508,-0.04248047,0.010093689,0.011260986,0.015823364,-0.0013618469,0.010017395,0.014762878,-0.006340027,0.00869751,-0.015655518,-0.026763916,0.0024490356,0.012611389,-0.002040863,0.007457733,-0.0034866333,0.024093628,0.012794495,0.043121338,0.00038957596,0.00029182434,-0.0009274483,0.016983032,-0.016662598,0.006149292,0.008544922,0.01373291,0.015235901,0.021118164,0.015335083,-0.038269043,-0.023773193,-0.017807007,0.003616333,0.008964539,-0.0021839142,-0.014160156,-0.000172019,0.005168915,-0.0020713806,-0.038909912,0.017745972,-0.033233643,-0.02432251,-0.0019817352,-0.011604309,0.0070381165,0.0039405823,-0.00655365,0.02168274,-0.00012898445,0.06341553,-0.008171082,-0.008811951,0.023910522,0.040222168,0.012207031,-0.030685425,-0.009048462,-0.009407043,0.0062789917,0.0015172958,-0.015533447,0.028137207,0.04421997,-0.0017347336,0.023147583,-0.02583313,0.020431519,-0.000467062,0.028747559,-0.010345459,0.012451172,-0.018341064,0.038146973,-0.04663086,0.00655365,0.028137207,0.001958847,-0.011512756,-0.014587402,-0.020721436,0.015777588,0.017562866,-0.013496399,0.05441284,-0.025665283,0.028137207,-0.026626587,-0.019012451,0.0012273788,-0.026260376,-0.022277832,0.030639648,-0.0073928833,0.007881165,0.025741577,-0.028457642,0.028076172,-0.038482666,0.01159668,-0.0021686554,-0.008728027,-0.009307861,-0.017349243,-0.019302368,-0.0043144226,-0.026367188,0.011192322,0.0016260147,0.047088623,0.029327393,0.022445679,0.03994751,0.01499939,0.017166138,-0.039489746,-0.025741577,-0.008712769,-0.039001465,0.013572693,-0.012184143,0.036499023,0.042419434,0.005519867,0.03869629,0.03829956,0.031799316,-0.006061554,0.01309967,-0.016983032,0.015052795,-0.009674072,0.027572632,0.011886597,0.040771484,-0.0209198,0.0132369995,0.006225586,0.021026611,-0.02180481,0.019744873,0.07696533,0.023361206,-0.011978149,0.04663086,-0.004749298,-0.014694214,-0.021957397,-0.014053345,0.052947998,0.01574707,0.047607422,0.036224365,0.014945984,-0.025527954,0.027862549,-0.027008057,-0.034820557,0.051635742,0.025787354,-0.031463623,-0.0051116943,-0.011947632,0.011878967,-0.052734375,-0.02508545,0.016296387,0.0060806274,0.01574707,-0.016281128,-0.00081443787,-0.012138367,0.024032593,0.01977539,0.019226074,-0.015609741,0.017059326,0.018859863,0.01499939,0.020141602,0.009895325,0.022964478,-0.032958984,-0.010719299,0.012016296,0.01725769,-0.010765076,-0.0011005402,0.032440186,0.012336731,0.047698975,0.024780273,-0.015335083,-0.0043144226,0.033203125,0.026168823,-0.0011520386,0.036010742,0.04046631,0.009017944,0.031341553,0.04977417,0.021697998,-0.027786255,0.0068855286,-0.009361267,0.02204895,0.0022411346,-0.012268066,0.016021729,-0.008293152,0.0140686035,0.0000049471855,-0.014411926,0.029281616,0.033569336,0.004497528,-0.0034427643,-0.0027427673,0.0026931763,0.0021018982,0.0008831024,0.013626099,-0.01576233,0.018005371,0.009223938,0.031097412,-0.033996582,0.02293396,-0.0064086914,-0.023620605,-0.005973816,0.016860962,-0.04638672,0.0020427704,0.0036964417,-0.008850098,-0.030181885,0.008201599,0.03010559,-0.0062789917,0.020141602,0.01777649,0.00077724457,0.010261536,0.018981934,0.019195557,-0.0025405884,-0.012252808,-0.019500732,0.031982422,0.05001831,-0.004863739,0.008155823,-0.020401001,0.0020999908,0.015609741,-0.010826111,-0.002922058,0.0059776306,-0.017364502,-0.036987305,0.014808655,0.033111572,0.02067566,0.026046753,0.00036382675,-0.023986816,-0.00025749207,0.02961731,0.0051879883,0.0035896301,-0.02003479,0.030471802,-0.0031356812,0.055908203,0.032836914,-0.0020446777,0.029067993,-0.019012451,-0.017578125,0.0077323914,-0.021392822,0.02720642,-0.024780273,-0.0011034012,-0.02255249,0.024627686,-0.015022278,-0.031341553,0.007843018,-0.0131073,-0.011207581,-0.018981934,-0.008781433,0.011039734,0.012123108,0.031829834,0.02079773,-0.024749756,0.06689453,-0.016571045,0.05621338,-0.015640259,-0.002790451,0.04550171,0.044036865,0.045196533,0.021484375,0.009880066,-0.026412964,0.0043144226,0.037597656,0.039031982,0.0107803345,0.0017204285,-0.010673523,0.026382446,-0.0064086914,0.024856567,-0.013824463,0.008239746,0.00472641,-0.005622864,-0.0029830933,0.007221222,-0.01222229,0.013328552,0.05441284,-0.025802612,-0.010795593,-0.0184021,-0.008834839,0.027740479,0.007446289,-0.00090265274,-0.0069274902,-0.013137817,0.018371582,-0.0335083,-0.010368347,0.011581421,0.031280518,-0.038726807,-0.023513794,0.0007519722,0.0070533752,-0.031097412,0.03164673,0.024597168,-0.005973816,0.014785767,0.04534912,-0.009780884,0.04425049,-0.0075645447,0.024765015,0.0317688,0.0052375793,-0.012336731,0.012664795,0.0041007996,-0.023544312,0.010429382,0.035827637,0.0053596497,0.0087890625,0.0016355515,-0.020767212,0.0030765533,0.004043579,-0.025482178,0.005821228,-0.011276245,0.0007786751,0.008682251,0.016281128,0.0085372925,0.004310608,-0.016082764,-0.006954193,0.0029029846,0.034942627,0.015960693,-0.049621582,0.0075263977,0.01108551,0.009262085,-0.021911621,-0.02571106,-0.013420105,-0.029144287,0.02027893,0.03250122,0.0013275146,0.011123657,-0.020080566,-0.004863739,0.039916992,0.005142212,0.017730713,0.0075912476,-0.0041503906,0.012191772,-0.016021729,0.0009498596,-0.008628845,-0.008277893,0.012252808,-0.0020503998,-0.007751465,-0.027053833,0.023162842,-0.008453369,0.015449524,0.004711151,-0.008872986,0.025604248,-0.007686615,-0.0181427,0.008735657,0.019897461,-0.017318726,-0.011817932,-0.038909912,0.020065308,0.04675293,-0.005897522,-0.009101868,0.012840271,0.02482605,0.03074646,0.04144287,0.016601562,0.045837402,0.026748657,-0.016616821,-0.0015697479,0.014144897,-0.013389587,-0.031799316,0.018692017,-0.0020103455,-0.00076532364,0.02658081,0.01777649,-0.01638794,-0.023483276,-0.024154663,-0.008293152,-0.023956299,0.01940918,-0.01838684,0.011627197,-0.027923584,-0.011413574,0.0063667297,-0.012138367,-0.04058838,-0.031555176,-0.0061836243,-0.020950317,-0.048339844,0.009048462,-0.028793335,0.014862061,-0.015319824,0.0027751923,-0.0046806335,0.028076172,-0.008102417,-0.0050964355,0.0066986084,0.03010559,0.010169983,0.009567261,0.012878418,-0.015571594,-0.030456543,-0.015602112,-0.0006093979,-0.022384644,0.013008118,-0.011383057,0.0423584,0.008720398,0.0029621124,-0.0037765503,-0.010025024,0.0012044907,-0.007537842,-0.046081543,-0.022399902,0.018676758,0.027740479,-0.006000519,-0.01928711,0.043121338,-0.0181427,-0.006214142,0.02319336,0.045166016,0.008201599,0.03555298,-0.012916565,-0.012756348,-0.020553589,-0.003490448,-0.021072388,-0.002248764,0.0056915283,0.0058250427,-0.0030612946,-0.0030937195,0.019821167,-0.0076446533,-0.0019350052,0.029174805,-0.0027599335,-0.019500732,0.031799316,0.014160156,0.0043029785,-0.006778717,-0.013763428,0.022384644,0.040618896,0.0077590942,-0.0011482239,-0.0044059753,0.011749268,-0.0090789795,0.012428284,0.018112183,-0.017364502,-0.03277588,-0.016616821,-0.030075073,0.01902771,0.009490967,0.016815186,0.007843018,0.008666992,-0.017150879,-0.030426025,-0.025436401,0.021453857,-0.0046691895,-0.016937256,-0.011795044,-0.00028967857,0.018371582,-0.03439331,0.009048462,-0.03543091,-0.01676941,-0.013694763,-0.024124146,0.022033691,0.005306244,-0.0058403015,0.0016698837,-0.0013837814,-0.0071868896,0.0019607544,0.033203125,-0.010467529,-0.0073280334,0.019317627,0.015159607,-0.022277832,0.0007853508,-0.011978149,-0.014694214,0.020385742,-0.017028809,0.0134887695,-0.018493652,0.034484863,0.01689148,-0.00844574,0.027648926,0.00006508827,0.013626099,-0.019546509,-0.0044441223,-0.000010609627,-0.002380371,0.030426025,-0.010307312,-0.019241333,0.007881165,-0.025238037,-0.038238525,0.0158844,0.032287598,0.033233643,-0.015159607,0.034423828,-0.022354126,-0.023757935,0.0015716553,0.004436493,-0.020706177,-0.0023860931,0.028152466,0.0118255615,-0.0076789856,0.0028514862,-0.012451172,-0.047851562,-0.0074310303,0.020614624,-0.0055732727,-0.0037155151,0.013168335,0.009895325,0.04788208,0.0014104843,0.015022278,0.02482605,0.0013551712,0.030426025,0.0025463104,0.047180176,-0.0070648193,-0.0357666,-0.00042963028,0.0069007874,-0.02192688,-0.008377075,-0.0029201508,0.010574341,-0.041778564,0.01991272,-0.0025253296,0.040893555,-0.022842407,0.0032176971,-0.025909424,-0.0041275024,-0.025375366,-0.0010623932,-0.0385437,0.019241333,0.030822754,0.014144897,0.0029506683,0.0046691895,-0.016418457,0.02810669,0.048583984,-0.010047913,-0.038116455,-0.004837036,0.01574707,0.011116028,0.0052757263,0.013504028,-0.011405945,-0.013824463,0.00031876564,-0.026351929,0.005420685,-0.01373291,0.012382507,0.0051956177,-0.005718231,-0.0037555695,0.025527954,0.008163452,-0.0024585724,0.0070381165,0.0009174347,0.03665161,0.041625977,-0.016830444,0.024002075,0.02470398,-0.03955078,0.050476074,-0.012939453,0.028503418,-0.024291992,0.0032958984,-0.037841797,-0.0184021,-0.007118225,0.00009161234],"createdAt":"2026-04-18T18:44:58.696Z","updatedAt":"2026-04-22T11:31:33.712Z","lastSeenAt":"2026-04-22T11:31:33.712Z","tsv":"'/api/v1/charges/29':49,152 '0.02':10,24,78,133 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':117 '20':123 '300':145 '6':129 'Base network API' 'USDC API' 'accept':105 'access':6,20,36,161 'address':116 'ai':65 'amount':120 'analysi':175 'analyt':64 'api':5,19,35,90,160,203 'appear':186 'application/json':139 'base':8,22,43,87,125 'behind':37,151 'beyond':156 'categori':61 'challeng':99 'coin':85 'commit':95 'confirm':100 'connect':211 'content':217 'data':63 'decim':130 'descript':172 'detail':196 'doc':201 'document':155,197 'endpoint':30,54,74,102,170 'equal':132 'etc':179 'exact':113 'exampl':194 'feed':178 'financ':68 'found':199 'function':150 'gate':3,17 'geocod':176 'howev':147 'includ':62 'infrastructur':71 'json-response' 'key':91 'label':158 'land':165 'learn':67 'limit':93 'list':167,189 'live':104 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':66 'mani':53,168 'max':119 'micropayment API' 'mime':136 'name':173 'network':44 'no-api-key' 'no-rate-limit' 'offer':55 'one':51 'openapi':191 'page':166,206 'paid API access' 'particular':182 'path':183 'pay':9,23 'pay-per-request' 'payabl':81 'payment':110,143 'paywal':40 'per':11,25,79 'post':106 'premium':4,18,34,159 'premium API' 'price':76,177,202 'prompt':213 'provid':33,58,163 'rate':92 'readm':205 'request':12,26,80,107 'request/response':193 'requir':96,121 'resourc':47 'respons':135 'return':208 'schema':192 'scheme':114 'second':146 'sentiment':174 'settl':109 'span':60 'specif':46,149 'substant':216 'timeout':141 'type':137 'unit':126 'usd':84 'usdc':14,28,83,128 'usdc-base' 'util':72 'via':111 'wallet':212 'web3':69 'x402':2,16,39,98 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"dab6780b-8440-4b94-8125-3ea662666a0d","listingId":"e655d30a-f108-411d-94f8-8835f834d3b0","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/29","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:58.696Z"}],"sources":[{"listingId":"e655d30a-f108-411d-94f8-8835f834d3b0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/29","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:58.696Z","lastSeenAt":"2026-04-22T11:31:33.712Z"}],"details":{"listingId":"e655d30a-f108-411d-94f8-8835f834d3b0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/29 \\\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, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/charges/29"},{"claim":"Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/charges/29"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/29"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Programmatic agent-driven API consumption with on-chain USDC micropayments","Testing x402 payment flows on Base network"],"bestFor":["Developers or agents wanting frictionless pay-per-request API access","x402-compatible clients on the Base network","Use cases where avoiding API key management is valuable"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-network USDC wallet or x402-compatible client","High-volume use cases where per-request pricing at $0.02 may be costly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:22.849Z"},"updatedAt":"2026-04-22T11:31:33.712Z"}}