{"id":"595bb2f8-34b0-4567-aba7-1d0db5bb788e","shortId":"WTMZUy","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to gate access to a variety of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Each call costs $0.02 in USDC on the Base network, settled directly on-chain with no API keys, rate limits, or subscription commitments required.\n\nThe specific endpoint at `/api/v1/charges/39` is listed as \"Premium API Access\" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per request. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.\n\nThe broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation utilities — all at the same $0.02/request price point. However, documentation beyond the landing page is extremely sparse: the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","json-response","http-post"],"categories":["api-gateway","infrastructure"],"synonyms":["pay-per-call API","x402 API","micropayment API","USDC API access","Base network API","low fee API","crypto-paid API"],"warnings":["No OpenAPI or schema documentation available; request body and response format are unknown.","The /docs, /pricing, /api, and /README pages contain no usable content beyond 'Connect wallet'.","The specific purpose of /api/v1/charges/39 ('Premium API Access') is not described anywhere — it may be a generic or placeholder endpoint.","Cannot verify what the endpoint actually returns upon successful payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/39","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/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The actual functionality behind 'Premium API Access' at /charges/39 is undefined — it is unclear what data or service it returns. 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":"2026-04-19T04:08:50.609Z","embedding":[-0.020599365,-0.03161621,0.04196167,0.021484375,0.019592285,-0.027618408,-0.0132751465,0.03463745,0.06378174,-0.066467285,0.021652222,-0.041107178,-0.036315918,-0.031463623,-0.021011353,0.008705139,-0.008514404,0.007610321,-0.056274414,0.05291748,0.020812988,-0.0057144165,-0.018508911,0.04421997,-0.002632141,-0.014984131,0.015670776,-0.016860962,-0.016540527,-0.031341553,0.020996094,-0.022903442,-0.009651184,0.013572693,0.0007009506,-0.0017156601,-0.015022278,0.045135498,0.028579712,0.001613617,-0.0012073517,-0.06549072,0.0044555664,-0.0040283203,-0.05291748,-0.01537323,0.020141602,-0.019348145,-0.017562866,0.011474609,-0.03338623,0.0037593842,-0.019088745,-0.0018014908,0.012863159,0.022903442,-0.017059326,-0.00058078766,0.011749268,0.009407043,0.0053520203,-0.06036377,-0.014549255,0.014549255,0.0058555603,0.055114746,-0.0036811829,0.038482666,0.006111145,0.06964111,0.039154053,0.048217773,0.056121826,0.0067977905,0.006290436,-0.007549286,-0.00674057,0.0574646,-0.018859863,0.0054626465,-0.010635376,-0.016723633,-0.048461914,-0.0043182373,-0.02558899,-0.061187744,-0.021255493,0.022735596,-0.020767212,0.026733398,-0.064453125,-0.005870819,-0.024719238,0.012321472,0.00060892105,0.0140686035,-0.015464783,0.019119263,-0.007472992,0.009895325,0.011703491,-0.045410156,0.019256592,0.024627686,0.058013916,0.040802002,0.016525269,0.026382446,-0.011184692,-0.014549255,-0.008010864,0.01777649,-0.022720337,-0.0181427,0.023620605,0.003929138,-0.016494751,0.024047852,-0.029052734,0.018356323,-0.057647705,0.041137695,0.027374268,-0.012588501,0.013427734,-0.041290283,-0.02355957,0.0031585693,-0.032348633,-0.013092041,0.01474762,0.014854431,0.03262329,-0.015792847,-0.013961792,-0.00076675415,-0.01776123,-0.021652222,-0.051574707,-0.021240234,0.041168213,-0.03186035,0.02659607,0.03967285,-0.091918945,-0.0060653687,-0.052764893,0.013412476,-0.049926758,-0.0054397583,-0.004337311,0.029266357,-0.02368164,-0.021728516,-0.015060425,-0.018692017,-0.022338867,0.04046631,-0.0025138855,0.036621094,-0.014053345,0.03744507,0.009552002,-0.0033073425,0.02909851,0.035308838,-0.01335144,-0.08282471,-0.08215332,-0.0413208,-0.006454468,-0.015533447,-0.035308838,-0.011810303,0.012001038,-0.0914917,-0.041992188,-0.0077209473,-0.0029258728,-0.029678345,-0.009536743,-0.033843994,0.012283325,-0.018936157,-0.0569458,-0.024261475,-0.028137207,0.06402588,0.015792847,0.0131073,0.016418457,-0.009933472,0.058166504,0.027404785,-0.011146545,-0.037017822,0.025802612,-0.014915466,0.031829834,0.009391785,0.0056419373,-0.03289795,0.036346436,0.055541992,0.009025574,-0.016967773,0.0104522705,-0.05026245,-0.043670654,-0.029647827,0.009231567,0.016204834,-0.013122559,0.01927185,-0.040740967,-0.037475586,-0.0070266724,0.0028419495,0.017486572,0.05419922,0.008407593,-0.008987427,0.004463196,0.012466431,-0.0413208,0.045043945,0.026000977,0.015419006,-0.011558533,-0.02204895,0.020706177,0.030593872,-0.037078857,-0.00013530254,-0.025939941,0.0118637085,0.018173218,0.0068511963,0.030258179,-0.02319336,-0.042144775,-0.03390503,-0.00548172,0.033294678,0.016586304,-0.03579712,-0.051452637,-0.07745361,0.04638672,0.055999756,0.026855469,0.009147644,0.007041931,-0.024627686,-0.004650116,-0.07739258,0.0692749,0.0826416,-0.0066833496,-0.01638794,0.020492554,-0.015129089,-0.01928711,-0.021102905,0.002708435,-0.017349243,-0.024093628,0.024612427,-0.039764404,-0.0051002502,0.017227173,0.01777649,0.04510498,-0.022521973,-0.04812622,-0.030548096,0.008598328,0.0032634735,-0.028579712,-0.0021476746,-0.0027561188,0.027359009,0.030334473,-0.00051498413,0.023803711,-0.00071048737,0.019683838,-0.016525269,-0.007972717,-0.026184082,-0.016677856,0.017684937,-0.004940033,-0.06185913,0.022354126,0.0022354126,0.051696777,-0.04321289,0.033294678,-0.008804321,0.009597778,0.058013916,-0.015060425,-0.047180176,0.0053253174,0.021270752,0.033172607,0.03704834,0.015686035,-0.0127334595,-0.006706238,0.06762695,-0.014961243,0.0041236877,0.0050354004,0.022155762,0.027999878,0.010261536,-0.06573486,-0.044189453,-0.00023210049,-0.028915405,0.03527832,-0.0362854,0.038879395,-0.01096344,0.015777588,-0.02748108,0.010269165,-0.042175293,0.011001587,-0.0098724365,0.004009247,-0.022491455,-0.026748657,0.0075645447,0.014671326,-0.030380249,-0.006916046,0.03161621,0.02243042,-0.006526947,-0.04321289,-0.028762817,-0.014503479,-0.0024909973,0.026123047,0.032440186,0.019836426,0.043762207,-0.043548584,0.015609741,0.020019531,0.0046310425,0.04864502,-0.008110046,0.011199951,-0.055236816,-0.05102539,-0.014724731,-0.043029785,0.040100098,0.028457642,0.008110046,0.05621338,0.00856781,-0.018692017,-0.023544312,0.022354126,-0.041015625,0.0019569397,0.041656494,-0.019424438,-0.044158936,0.0054397583,0.0029640198,0.012916565,0.02772522,0.012649536,0.0022144318,0.06854248,0.034576416,0.009773254,0.026809692,0.023529053,0.022872925,0.004306793,-0.028915405,-0.022766113,-0.008758545,0.021224976,-0.025512695,-0.019485474,-0.061462402,0.051971436,0.033843994,0.084472656,0.019088745,0.009757996,0.03152466,-0.009803772,0.004989624,-0.02722168,-0.025161743,-0.03491211,-0.040496826,0.02748108,-0.010551453,-0.0069770813,-0.03466797,0.03253174,0.010154724,0.009429932,-0.03253174,0.05984497,-0.0050354004,-0.02355957,0.01826477,0.017623901,0.051086426,0.04333496,-0.046325684,0.021942139,0.01084137,-0.034179688,-0.0074272156,0.04449463,0.0010099411,-0.017944336,-0.06097412,-0.03878784,-0.0077323914,-0.018829346,-0.058929443,-0.0072898865,0.000995636,0.023254395,0.026565552,-0.006439209,-0.026733398,-0.00097084045,-0.020935059,-0.055389404,-0.007865906,-0.04559326,0.0038547516,0.033477783,-0.030441284,-0.0061683655,-0.0067977905,0.0002539158,-0.013809204,0.01878357,0.008285522,-0.0019302368,-0.058776855,0.03555298,0.009979248,0.002506256,0.014434814,0.032989502,0.0513916,0.011207581,0.0491333,0.009025574,-0.02229309,-0.053466797,0.02406311,-0.034606934,0.005569458,0.0055351257,-0.001783371,-0.010070801,-0.025009155,-0.020309448,-0.02809143,0.0155181885,-0.023071289,0.0067749023,0.027450562,-0.041748047,-0.01651001,-0.055480957,-0.019104004,-0.011375427,0.07550049,0.03515625,-0.02458191,-0.06719971,-0.013557434,0.028320312,-0.0025997162,0.0158844,-0.014640808,-0.013000488,0.0009994507,-0.046875,-0.016098022,-0.019897461,0.029632568,-0.009384155,-0.00022411346,0.018936157,0.00026631355,0.004863739,-0.01361084,-0.005039215,0.03314209,-0.020462036,-0.009468079,-0.032073975,0.0061950684,0.0024108887,0.0049057007,-0.040924072,0.050079346,0.009063721,0.037261963,-0.037353516,0.004020691,0.0060539246,0.017608643,0.022705078,-0.014656067,-0.0101623535,0.008811951,-0.036193848,-0.07299805,0.039367676,-0.03253174,0.021331787,0.0068511963,0.0037059784,0.036254883,-0.017471313,0.0033931732,0.023422241,-0.027877808,-0.011260986,-0.022140503,-0.038757324,-0.007675171,0.007843018,-0.016677856,0.014503479,-0.014450073,0.0070877075,-0.017120361,-0.02558899,0.030807495,0.010902405,-0.01335907,0.030548096,0.0012998581,0.028137207,0.052093506,0.0062675476,-0.023986816,0.01826477,-0.0070877075,-0.0009551048,-0.01222229,0.04727173,0.014083862,-0.018966675,-0.013717651,-0.0060310364,-0.012054443,-0.027069092,-0.008865356,0.014778137,0.030776978,0.0084991455,-0.037017822,0.018432617,0.012023926,-0.022537231,-0.010604858,0.012199402,0.014694214,-0.031341553,0.03289795,0.02029419,0.0574646,-0.02104187,0.005962372,-0.0022945404,0.03427124,0.026733398,0.019363403,-0.020065308,0.01889038,-0.012786865,0.012466431,-0.006477356,-0.011306763,0.017166138,-0.007873535,0.0073623657,0.028640747,0.019683838,-0.02218628,-0.030670166,0.01423645,-0.009841919,-0.01776123,0.021270752,0.010528564,0.015945435,-0.023788452,0.028457642,0.017227173,-0.035247803,-0.017150879,-0.010574341,0.052947998,-0.011070251,-0.001613617,0.017654419,0.0025177002,0.029464722,-0.056365967,-0.001996994,0.010383606,0.015098572,-0.016723633,-0.04522705,-0.03475952,0.004383087,0.029830933,0.009292603,0.008415222,0.025604248,-0.002796173,0.00737381,0.02003479,-0.0049705505,-0.015113831,-0.012039185,-0.053222656,-0.010940552,-0.0065574646,-0.0025081635,-0.027618408,0.010902405,-0.020553589,-0.033355713,0.007209778,-0.012786865,-0.0064926147,-0.004432678,0.01676941,0.039733887,-0.001004219,0.006126404,-0.019317627,-0.01675415,0.006729126,-0.00051784515,0.022720337,-0.040496826,0.009750366,-0.020324707,0.0027122498,-0.008399963,0.008125305,0.013679504,0.017852783,0.0022354126,0.029373169,-0.039916992,0.040374756,-0.038604736,0.015808105,0.0018529892,-0.034820557,-0.010902405,-0.029205322,-0.015350342,0.046142578,-0.019561768,0.0012302399,-0.025009155,-0.030014038,-0.0065345764,-0.04660034,0.00541687,0.025817871,0.03756714,-0.03189087,-0.002105713,0.013000488,0.0025691986,-0.018035889,0.009719849,-0.016311646,0.026016235,0.019515991,0.002527237,-0.015090942,-0.018218994,-0.0067749023,-0.0023231506,-0.052337646,-0.043518066,-0.031021118,0.010894775,-0.006198883,-0.007499695,-0.029006958,-0.02331543,0.0005469322,-0.03552246,0.015701294,0.0051956177,0.019622803,0.009307861,-0.022521973,-0.0022392273,0.024978638,-0.025909424,0.034240723,-0.007068634,-0.013961792,-0.051086426,-0.0022468567,0.03427124,0.02128601,-0.0093688965,-0.018585205,0.004760742,-0.023849487,-0.04776001,0.0031089783,-0.01612854,0.007457733,0.0082092285,0.0066452026,-0.053863525,-0.016799927,-0.025604248,0.0078048706,0.018875122,0.022232056,0.009437561,0.00008368492,0.009300232,-0.007972717,-0.007980347,-0.03515625,0.008277893,0.010696411,-0.0039863586,0.014640808,0.04244995,0.0059280396,-0.014930725,-0.002199173,0.0039787292,0.013061523,-0.032562256,0.0063056946,-0.028640747,0.014839172,-0.009857178,-0.01524353,-0.034698486,0.0011892319,0.07476807,0.002948761,-0.00687027,-0.008384705,-0.014633179,0.02027893,0.020507812,-0.058044434,-0.012374878,-0.035461426,0.025344849,-0.021408081,0.014839172,0.0015821457,0.015960693,-0.03463745,-0.06439209,-0.008926392,0.011779785,-0.007801056,-0.057678223,-0.016494751,-0.058929443,0.000259161,-0.011764526,-0.015144348,-0.006877899,0.0059547424,-0.02078247,-0.07495117,0.0074539185,0.055908203,0.0036945343,0.022979736,-0.019088745,0.013336182,0.032073975,-0.01902771,-0.002904892,0.022415161,-0.023620605,-0.021011353,-0.014198303,0.030181885,-0.011413574,-0.018951416,0.026184082,0.016784668,0.021057129,-0.0040512085,0.015129089,-0.01448822,0.012908936,0.0015554428,0.011886597,-0.004463196,0.0019397736,0.014526367,-0.039733887,0.029571533,0.01713562,-0.0019798279,-0.001537323,0.020401001,0.038909912,-0.040100098,-0.017547607,0.03656006,0.0054855347,0.038604736,-0.030044556,0.04815674,0.02142334,-0.017150879,0.017593384,-0.015899658,-0.03753662,-0.030914307,-0.03933716,0.019592285,0.026184082,0.013061523,-0.007701874,0.0033512115,0.0181427,0.00033259392,-0.00014436245,-0.020721436,-0.013336182,-0.01322937,0.01727295,-0.0023059845,0.009994507,0.00037622452,0.022262573,0.02607727,0.042877197,-0.006839752,-0.0016317368,0.0034122467,0.020233154,-0.015205383,0.0011358261,0.01461792,0.015235901,0.020736694,0.018875122,0.0234375,-0.03817749,-0.025405884,-0.016723633,-0.015151978,0.006439209,0.0034427643,-0.0037517548,-0.0023479462,0.00058460236,-0.0063209534,-0.03503418,0.015022278,-0.03955078,-0.031066895,0.0052261353,-0.008995056,0.012107849,0.0043678284,0.004360199,0.0006380081,0.0012226105,0.056640625,-0.0015192032,-0.0035591125,0.032806396,0.043884277,0.020690918,-0.033813477,-0.011672974,-0.009384155,-0.01423645,0.0014381409,-0.021240234,0.01020813,0.048553467,-0.014892578,0.014709473,-0.017684937,0.01626587,0.0045547485,0.009559631,-0.007713318,0.0042304993,-0.017974854,0.036071777,-0.053253174,0.009605408,0.022994995,0.0028629303,-0.014183044,-0.014228821,-0.028549194,0.016281128,0.012008667,-0.012870789,0.05429077,-0.0065574646,0.02003479,-0.0181427,-0.02432251,0.014724731,-0.027999878,-0.02659607,0.034332275,-0.02243042,-0.0071258545,0.018051147,-0.01448822,0.031982422,-0.03753662,0.0047187805,0.005996704,0.00084400177,-0.0036964417,-0.01651001,-0.010131836,-0.011810303,-0.01209259,0.0060310364,0.004371643,0.04119873,0.022415161,0.030853271,0.03982544,0.025299072,0.012878418,-0.046417236,-0.024261475,-0.0039711,-0.03463745,0.016738892,-0.010902405,0.043945312,0.033569336,0.006843567,0.034973145,0.040130615,0.033050537,-0.0005464554,0.012268066,-0.018173218,0.014839172,-0.019378662,0.032043457,-0.002506256,0.040527344,-0.035339355,0.0087509155,0.0021324158,0.020004272,-0.024978638,0.025619507,0.064208984,0.024353027,-0.014411926,0.05328369,-0.007205963,-0.0119018555,-0.016296387,-0.008964539,0.059570312,0.020217896,0.039611816,0.043884277,0.01033783,-0.01159668,0.020477295,-0.027145386,-0.039916992,0.05517578,0.029830933,-0.026916504,-0.0099487305,-0.0052986145,0.014633179,-0.051757812,-0.019058228,0.018753052,0.0037956238,0.006996155,-0.011428833,-0.010368347,-0.019866943,0.025741577,0.019210815,0.014511108,-0.019439697,0.009422302,0.017684937,0.0073432922,0.033477783,0.005279541,0.017471313,-0.023757935,-0.016708374,0.0129776,0.022842407,-0.012908936,-0.0016918182,0.024398804,0.018493652,0.036102295,0.028823853,-0.020843506,-0.005645752,0.018737793,0.02949524,0.0044670105,0.047668457,0.038513184,0.012794495,0.034210205,0.045715332,0.026428223,-0.03375244,0.00894928,-0.0059280396,0.014251709,0.0000320673,-0.011260986,0.014289856,-0.0002477169,0.014251709,0.002286911,-0.009597778,0.028060913,0.025894165,0.0066604614,-0.005252838,-0.014411926,0.0057411194,-0.016418457,0.0048179626,0.016220093,-0.020812988,0.020141602,0.014328003,0.030227661,-0.031555176,0.017791748,-0.003704071,-0.021133423,-0.008720398,0.010948181,-0.043548584,-0.0020771027,-0.007881165,-0.0071144104,-0.031036377,0.007106781,0.035888672,-0.013961792,0.029052734,0.0118637085,0.0034942627,-0.009277344,0.02305603,0.016403198,0.00029206276,-0.019302368,-0.018356323,0.031341553,0.049682617,-0.0031642914,-0.00070381165,-0.02696228,-0.00092077255,0.010810852,-0.013549805,0.0045776367,-0.002752304,-0.0154418945,-0.02508545,0.016540527,0.043395996,0.017425537,0.029937744,-0.011260986,-0.026550293,0.007648468,0.030227661,0.004550934,0.0035629272,-0.011688232,0.030380249,-0.009437561,0.04547119,0.03616333,0.0040397644,0.031311035,-0.014694214,-0.010246277,0.01399231,-0.020202637,0.027404785,-0.01486969,0.002872467,-0.018707275,0.028533936,-0.010063171,-0.026748657,-0.0041122437,-0.016403198,-0.01713562,-0.024841309,0.009300232,0.006275177,0.019973755,0.03677368,0.026046753,-0.02960205,0.06488037,-0.013954163,0.04937744,-0.015365601,-0.0017108917,0.0647583,0.036712646,0.039794922,0.02420044,0.011116028,-0.023345947,0.007904053,0.03262329,0.033111572,0.004486084,0.011703491,-0.003917694,0.037078857,-0.004852295,0.022369385,-0.010108948,-0.0070724487,0.0015916824,-0.0050354004,-0.013809204,0.005218506,-0.002544403,0.012207031,0.05392456,-0.022460938,-0.0057029724,-0.024978638,-0.015686035,0.029937744,-0.00019955635,-0.0028152466,-0.011940002,-0.025558472,0.00617218,-0.027114868,-0.019439697,0.015075684,0.028915405,-0.043884277,-0.019607544,0.006576538,0.023666382,-0.030883789,0.030563354,0.027450562,-0.0008893013,0.0118255615,0.047790527,-0.012519836,0.041381836,0.0021839142,0.02923584,0.027954102,0.010986328,-0.020645142,0.0007305145,0.0063056946,-0.004650116,0.0087509155,0.034454346,-0.00819397,0.00024914742,0.00065660477,-0.01108551,0.0039405823,0.012481689,-0.019332886,0.01084137,-0.0028476715,-0.013702393,0.011947632,0.0042037964,0.0068244934,0.00774765,-0.015403748,-0.0072517395,0.0051002502,0.027175903,0.01826477,-0.04345703,0.0012626648,0.010261536,0.017822266,-0.021881104,-0.029708862,-0.008102417,-0.036132812,0.018569946,0.0234375,0.0013856888,0.0045394897,-0.02079773,0.0029525757,0.032928467,0.0030651093,0.008430481,0.002779007,-0.0079574585,0.007621765,-0.013832092,-0.006175995,-0.0051841736,-0.0068855286,0.0066566467,0.0129852295,-0.010177612,-0.028533936,0.021774292,0.0012598038,0.009857178,0.0024299622,-0.006839752,0.03778076,-0.009399414,-0.009933472,0.013046265,0.014709473,-0.0143966675,-0.012939453,-0.02571106,0.029785156,0.053009033,-0.007133484,-0.0062789917,0.010437012,0.02243042,0.021835327,0.038116455,0.014961243,0.036193848,0.020050049,-0.016921997,-0.014694214,0.017730713,-0.016220093,-0.035339355,0.021072388,-0.011009216,-0.008613586,0.020202637,0.009780884,-0.0074539185,-0.03213501,-0.012191772,-0.012329102,-0.011398315,0.022918701,-0.015060425,0.023239136,-0.024261475,-0.004512787,0.011131287,-0.027328491,-0.04034424,-0.021240234,-0.0023880005,-0.016525269,-0.048065186,0.001745224,-0.029052734,0.005531311,-0.012916565,-0.0041923523,-0.012557983,0.033050537,-0.010658264,0.002904892,0.0050811768,0.031066895,0.008148193,0.0077209473,0.017959595,-0.02545166,-0.022109985,-0.021316528,0.001616478,-0.015945435,0.015312195,0.0035114288,0.040740967,0.0023708344,-0.020965576,-0.00017440319,-0.009857178,-0.0079193115,-0.011077881,-0.034088135,-0.028656006,0.01361084,0.029006958,-0.0074653625,-0.016235352,0.042541504,-0.025848389,-0.0044784546,0.019058228,0.04232788,0.01612854,0.027374268,-0.011482239,-0.008346558,-0.02357483,-0.00065279007,-0.009170532,-0.006702423,0.022613525,-0.0056381226,-0.0016317368,0.0026226044,0.018203735,-0.017150879,-0.004562378,0.027435303,0.009780884,-0.022537231,0.04220581,0.010848999,0.00029492378,-0.010284424,-0.008934021,0.023345947,0.04611206,0.010574341,0.012245178,-0.00111866,0.0038967133,0.0021514893,0.020599365,0.032318115,-0.02658081,-0.04345703,-0.031555176,-0.039398193,0.014122009,0.008300781,0.015182495,0.00038075447,0.013046265,-0.028503418,-0.022415161,-0.01739502,0.026062012,-0.000207901,-0.016220093,-0.0063285828,0.0047416687,0.014434814,-0.041137695,0.0024051666,-0.041015625,-0.021469116,-0.017120361,-0.019470215,0.020889282,0.0077590942,-0.005970001,0.003326416,-0.0039634705,-0.009590149,-0.0028381348,0.033813477,-0.012619019,-0.008529663,0.018188477,0.017608643,-0.028656006,0.0048332214,-0.00730896,-0.012916565,0.012176514,-0.0121154785,0.020507812,-0.016143799,0.023971558,0.0044059753,0.0002629757,0.038024902,-0.007575989,0.01737976,-0.016647339,-0.006454468,0.0026836395,-0.0066947937,0.031921387,-0.011741638,-0.030807495,0.01071167,-0.020889282,-0.03274536,0.009651184,0.02458191,0.035247803,-0.004966736,0.040130615,-0.014854431,-0.022705078,0.015151978,0.0076560974,-0.020141602,0.0072631836,0.03387451,0.004535675,-0.004787445,0.0059890747,-0.0031700134,-0.033233643,-0.011421204,0.014778137,-0.010475159,-0.014694214,0.021881104,0.01448822,0.045715332,-0.011138916,0.015388489,0.026184082,0.0026130676,0.031463623,-0.0025615692,0.051452637,-0.00075626373,-0.03189087,0.0025615692,0.0036354065,-0.02230835,-0.0010356903,-0.0023155212,0.009391785,-0.03982544,0.01071167,-0.009628296,0.039489746,-0.0284729,0.003522873,-0.024139404,-0.0061798096,-0.032440186,-0.0048828125,-0.03543091,0.018447876,0.036376953,0.015098572,0.01486969,0.005001068,-0.031311035,0.031204224,0.047424316,0.0002963543,-0.03869629,-0.013137817,0.018875122,0.00031757355,-0.00029349327,0.012306213,-0.01637268,-0.010948181,-0.005619049,-0.01965332,-0.0017156601,-0.009231567,0.02444458,0.010139465,-0.0062217712,-0.0030765533,0.023529053,0.009666443,-0.0027179718,-0.00081682205,0.002538681,0.036010742,0.039154053,-0.020767212,0.01777649,0.026321411,-0.03930664,0.059295654,-0.013648987,0.02180481,-0.010505676,0.014961243,-0.033172607,-0.016021729,-0.014381409,0.008216858],"createdAt":"2026-04-18T18:45:27.797Z","updatedAt":"2026-04-23T23:32:10.514Z","lastSeenAt":"2026-04-23T23:32:10.514Z","tsv":"'/api':194 '/api/v1/charges/39':98 '/docs':193 '/pricing':195 '/readme':197 '/request':180 '0.02':10,28,72,125,179 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':134 '0x8335':119 '20':113 '2913':120 '300':137 '6':123 'Base network API' 'USDC API access' 'accept':142 'access':6,24,53,104 'addit':152 'address':133 'advertis':151 'ai/ml':62 'analysi':156 'analyt':61 'api':5,17,23,35,44,86,103 'application/json':147 'avail':224 'base':8,26,77,115,122 'beyond':185 'broader':149 'call':70 'chain':83 'challeng':109 'classif':159 'commit':92 'connect':203 'convers':171 'cost':71 'crawl':227 'crypto-paid API' 'data':60,65 'decim':124 'detail':210 'direct':80 'document':184,219 'embed':160 'endpoint':58,96,141,153 'estim':168 'exampl':223 'exchang':163 'extrem':190 'feed':162 'finance/web3':64 'gas':167 'gate':3,21,52 'generat':173 'geocod':169 'howev':183 'http':143 'http-post' 'includ':154 'infer':63 'json-response' 'key':18,36,87 'land':187 'limit':89 'list':100 'low fee API' 'lowpaymentfee.com':37 'materi':228 'micropayment API' 'network':78 'no-api-key' 'on-chain':81 'openapi':214 'page':188,198 'pay':9,27,41 'pay-per-call API' 'pay-per-request':40 'payment':129 'per':11,29,42,126 'per-request-billing' 'platform':45,150 'point':182 'post':144 'premium':4,22,102 'price':161,181 'prompt':205 'protocol':50 'quot':166 'rate':88,164 'render':200 'request':12,30,43,110,127 'request/response':217 'requir':93 'return':106,146 'schema':218 'second':138 'sent':131 'sentiment':155 'servic':68 'settl':79 'span':59 'spars':191 'spec':215 'specif':95 'subscript':91 'summar':158 'technic':209 'text':157 'timeout':139 'token':165 'unit':116 'usag':222 'usdc':14,32,74,118 'usdc-base' 'use':47 'util':67,174 'valid':170 'varieti':56 'wallet':204 'x402':2,20,49,108 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"61666e74-576b-4caf-a32a-ebcc1ea810a2","listingId":"595bb2f8-34b0-4567-aba7-1d0db5bb788e","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/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:27.797Z"}],"sources":[{"listingId":"595bb2f8-34b0-4567-aba7-1d0db5bb788e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/39","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:27.797Z","lastSeenAt":"2026-04-23T23:32:10.514Z"}],"details":{"listingId":"595bb2f8-34b0-4567-aba7-1d0db5bb788e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/39 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns an x402 challenge requesting up to 20,000 base units of USDC on Base ($0.02) per request","source_url":"https://lowpaymentfee.com/api/v1/charges/39"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/39"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents that need on-demand API access without managing API keys or subscriptions","Paying for individual API calls with USDC on Base for data, AI, or utility endpoints","Prototyping integrations where per-request crypto billing simplifies access control"],"bestFor":["Developers or agents wanting zero-setup, keyless API access","Use cases where per-call micropayments in USDC are preferred over subscriptions","Quick experimentation with pay-as-you-go pricing on Base"],"notFor":["High-volume production workloads where per-request on-chain payment adds latency and cost overhead","Users who need detailed API documentation, request schemas, or response guarantees before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:21.457Z"},"updatedAt":"2026-04-23T23:32:10.514Z"}}