{"id":"2a815458-1b36-43ad-a7f3-4d20c8362e3d","shortId":"JnUCRe","kind":"x402","title":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are settled on the Base network using USDC, with a uniform price of $0.02 per request. The x402 protocol means no API keys, no accounts, and no rate limits — callers simply attach an X-PAYMENT header with a signed USDC payment to each request.\n\nThe specific endpoint at `/api/v1/payments/93` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USDC, i.e., $0.02) on the Base network. The payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation 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","pay-per-request","usdc-settlement","base-network","json-api","no-api-key","post-method"],"categories":["infrastructure","api-marketplace"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto-paid API","402 payment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown.","Docs, API, pricing, and README pages all render only 'Connect wallet' with no technical content.","The specific purpose of /api/v1/payments/93 ('Premium API Access') is not documented; it is unclear what data or service it provides.","No request body schema or response examples are available from any crawled source."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/93","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/payments/93","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of this specific '/payments/93' endpoint is unclear beyond the generic 'Premium API Access' label. Effectively a stub listing.","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":"2026-04-19T07:20:00.882Z","embedding":[-0.028259277,-0.03994751,0.034851074,0.018829346,0.010879517,-0.039916992,-0.015274048,0.03543091,0.074523926,-0.06829834,0.017593384,-0.04800415,-0.03338623,-0.036193848,-0.023345947,0.015029907,0.0037231445,0.00065135956,-0.039276123,0.029052734,0.016189575,-0.01171875,-0.037231445,0.03289795,0.006690979,-0.013557434,-0.004234314,-0.0018997192,-0.01687622,-0.05404663,0.04309082,-0.026687622,-0.014465332,0.014183044,-0.019073486,-0.0112838745,-0.007980347,0.031173706,0.027557373,-0.014472961,-0.009742737,-0.064941406,0.012176514,-0.01348114,-0.05935669,0.00039052963,0.017700195,-0.022766113,-0.0013046265,0.0010166168,-0.03768921,-0.004611969,-0.0154800415,0.0068893433,0.002861023,0.014091492,-0.010932922,-0.0032424927,0.017669678,0.01939392,0.004512787,-0.058685303,-0.01701355,-0.0030899048,-0.0009765625,0.05340576,-0.007381439,0.029037476,0.0049209595,0.068237305,0.03390503,0.04736328,0.027709961,0.011131287,-0.00013113022,-0.007045746,0.0014314651,0.059906006,-0.007972717,-0.033813477,-0.0072631836,-0.017868042,-0.048706055,0.00308609,-0.020309448,-0.048980713,-0.015975952,0.025894165,-0.021499634,0.032287598,-0.07312012,-0.011436462,-0.017929077,-0.000097215176,0.008308411,-0.0077400208,-0.018325806,0.0158844,-0.012359619,0.0138168335,-0.004470825,-0.042510986,0.014450073,0.017074585,0.03744507,0.052520752,0.012939453,0.017593384,0.0121154785,-0.003326416,-0.038513184,0.019439697,-0.014259338,-0.01826477,0.017944336,0.0033187866,-0.015136719,0.0118637085,-0.032958984,0.011375427,-0.04727173,0.052215576,0.018005371,0.013511658,0.01586914,-0.047332764,-0.027359009,0.01914978,-0.020614624,-0.009757996,0.012832642,0.008651733,0.028381348,-0.0038375854,-0.03277588,0.017532349,-0.022201538,-0.0151901245,-0.05255127,-0.036834717,0.040863037,-0.034362793,0.012565613,0.034973145,-0.093566895,-0.012237549,-0.049926758,-0.0037155151,-0.038513184,-0.013015747,0.008605957,0.017578125,-0.022399902,-0.0067367554,-0.021469116,-0.024337769,-0.0065689087,0.04055786,-0.008918762,0.045959473,-0.01576233,0.039031982,0.02508545,0.002714157,0.01927185,0.031982422,-0.0066452026,-0.08251953,-0.080444336,-0.024124146,-0.0037193298,-0.026275635,-0.027557373,0.012283325,-0.004283905,-0.083496094,-0.022415161,-0.008712769,-0.015304565,-0.038848877,0.002336502,-0.035614014,0.011398315,-0.011581421,-0.051818848,-0.01965332,-0.031921387,0.060272217,0.027557373,0.022094727,0.026779175,-0.02456665,0.053741455,0.025543213,-0.007282257,-0.022491455,0.021621704,-0.019119263,0.010894775,-0.0027427673,0.01576233,-0.020095825,0.04220581,0.07434082,-0.00069379807,-0.021881104,-0.010826111,-0.05392456,-0.05102539,-0.02519226,0.022399902,0.006702423,-0.0009899139,0.030578613,-0.0340271,-0.026809692,0.0064086914,0.017410278,0.006298065,0.06744385,0.002626419,-0.008003235,0.035888672,0.024810791,-0.053619385,0.040527344,0.03866577,0.021270752,-0.02003479,-0.027709961,0.030792236,0.037628174,-0.028930664,0.01914978,-0.018661499,0.024734497,-0.0105896,0.004085541,0.014152527,-0.01676941,-0.02961731,-0.026306152,-0.029388428,0.027297974,0.0074043274,-0.027633667,-0.031677246,-0.084472656,0.047576904,0.030471802,0.030456543,-0.0006542206,0.0032463074,-0.02519226,-0.0036258698,-0.077697754,0.06439209,0.06933594,0.006023407,-0.011383057,0.02279663,-0.0087509155,-0.032684326,0.003042221,-0.0050811768,-0.03201294,-0.030166626,0.025131226,-0.04348755,-0.0034294128,0.028823853,0.021575928,0.046020508,-0.0073432922,-0.042022705,-0.022232056,-0.005958557,-0.008026123,-0.037139893,-0.003271103,-0.0077667236,0.018722534,0.030426025,0.0018692017,0.020233154,-0.006340027,-0.002450943,-0.0055236816,0.0035705566,-0.012557983,-0.028701782,0.02267456,0.0017642975,-0.05734253,0.016296387,-0.008666992,0.0713501,-0.042633057,0.03543091,-0.013404846,0.017532349,0.052764893,-0.014854431,-0.048706055,-0.0010070801,0.021896362,0.010131836,0.041870117,0.015365601,-0.03161621,-0.008522034,0.06970215,-0.015930176,-0.010635376,0.017669678,0.010673523,0.027618408,-0.0012950897,-0.05734253,-0.03970337,0.006767273,-0.027893066,0.03665161,-0.017303467,0.029571533,-0.010169983,0.0008716583,-0.029037476,0.005367279,-0.028533936,0.006652832,-0.018005371,0.0075149536,-0.012138367,-0.021057129,0.01084137,0.020019531,-0.02230835,0.0053482056,0.036315918,0.019226074,-0.004501343,-0.027816772,-0.039031982,-0.01374054,-0.01876831,0.017074585,0.027252197,0.029800415,0.05621338,-0.038391113,0.008773804,0.028305054,0.009094238,0.040283203,-0.0046424866,-0.0021247864,-0.07672119,-0.051361084,-0.02571106,-0.042907715,0.03201294,0.021011353,-0.004840851,0.057647705,0.00919342,-0.027374268,-0.039398193,0.01096344,-0.03869629,-0.004383087,0.039093018,-0.020996094,-0.024108887,0.011878967,-0.012313843,0.0071105957,0.043151855,0.018676758,0.024719238,0.0647583,0.037872314,0.009346008,0.019760132,0.006061554,0.030532837,0.015609741,-0.01776123,-0.017364502,-0.009407043,0.037963867,-0.017166138,-0.018814087,-0.051940918,0.06738281,0.038513184,0.08898926,0.021118164,0.0022411346,0.04171753,-0.023666382,0.011360168,-0.017333984,-0.020431519,-0.025146484,-0.044555664,0.03274536,-0.009391785,-0.003774643,-0.018234253,0.034851074,-0.00013411045,0.020950317,-0.033416748,0.045684814,-0.01234436,-0.015609741,0.019683838,0.01626587,0.05404663,0.057739258,-0.047729492,0.023651123,0.009643555,-0.037017822,0.00067806244,0.034851074,-0.019927979,-0.009651184,-0.04928589,-0.029953003,-0.0051994324,-0.004901886,-0.047424316,-0.0013217926,-0.00022780895,0.0184021,0.02923584,-0.014770508,-0.0075531006,-0.01966858,-0.013130188,-0.05758667,-0.006755829,-0.038116455,-0.0075798035,0.030349731,-0.025253296,-0.008384705,0.0002541542,-0.00381279,-0.01272583,0.025680542,0.03765869,0.0054779053,-0.039855957,0.033721924,0.007484436,0.009140015,0.013923645,0.04168701,0.021499634,0.030883789,0.042236328,0.012825012,-0.010375977,-0.068359375,0.023223877,-0.041290283,-0.0006599426,0.02230835,-0.017700195,-0.0024585724,-0.024536133,-0.03250122,-0.033355713,0.016784668,-0.02041626,-0.0010004044,0.024108887,-0.017959595,-0.022735596,-0.055480957,-0.022338867,-0.004737854,0.06304932,0.022277832,-0.0011806488,-0.066589355,-0.008110046,0.02168274,0.0067863464,0.03137207,-0.013961792,-0.006008148,-0.010070801,-0.03741455,-0.0060272217,-0.019088745,0.024230957,-0.010551453,0.00033044815,0.012512207,0.013389587,0.02684021,0.0024738312,0.010276794,0.01965332,-0.027709961,-0.0022583008,-0.0052337646,0.027999878,0.015174866,0.00019586086,-0.04006958,0.048797607,0.014053345,0.034851074,-0.042633057,-0.007320404,-0.0073165894,0.00957489,0.017745972,-0.006877899,-0.010154724,-0.008773804,-0.046020508,-0.0736084,0.044128418,-0.027893066,0.032073975,0.02670288,0.0042915344,0.021118164,-0.0064849854,0.0039749146,0.020065308,-0.027145386,-0.018493652,-0.022338867,-0.03479004,-0.025817871,-0.011482239,-0.023284912,0.024414062,-0.022521973,0.013305664,-0.0044937134,-0.023788452,0.018875122,-0.0014810562,-0.011512756,0.0211792,0.006000519,0.02658081,0.04067993,0.0082092285,-0.03189087,0.0236969,0.005130768,0.002790451,-0.006954193,0.048583984,0.037017822,-0.013664246,-0.00806427,-0.01033783,-0.017471313,-0.026763916,0.0073661804,0.0005097389,0.009246826,-0.0035648346,-0.041931152,0.008255005,0.007522583,-0.028076172,-0.028747559,0.0077819824,0.008796692,-0.03768921,0.023620605,0.020507812,0.04699707,-0.020812988,-0.0022716522,-0.004627228,0.035003662,0.030395508,0.013931274,-0.0115356445,0.018859863,-0.00881958,0.014770508,-0.0053520203,-0.012763977,0.018096924,0.0043563843,0.020568848,0.020004272,0.00674057,-0.026046753,-0.037017822,0.004333496,-0.015419006,-0.034362793,0.018585205,0.015731812,0.022644043,-0.024108887,0.01966858,0.014038086,-0.010421753,-0.017623901,-0.015022278,0.04055786,-0.008628845,-0.018798828,0.020065308,0.011383057,0.031341553,-0.053009033,-0.0047416687,-0.0020942688,0.012046814,-0.03173828,-0.04168701,-0.036071777,-0.0013599396,0.035827637,0.013381958,0.024978638,0.032043457,-0.0021781921,0.0047416687,0.02696228,0.0022411346,-0.015991211,-0.011627197,-0.05316162,-0.021484375,-0.01134491,0.0028972626,-0.02911377,0.01727295,0.00053310394,-0.025772095,0.013404846,-0.008216858,-0.0071792603,-0.010322571,0.0046463013,0.043945312,0.0042152405,0.021560669,-0.024414062,-0.03869629,-0.007511139,0.011779785,0.011505127,-0.046875,0.013389587,-0.012077332,-0.005130768,0.0038490295,0.008636475,0.01777649,0.030838013,0.014854431,0.029464722,-0.04034424,0.04864502,-0.044403076,0.020339966,-0.00073957443,-0.027954102,-0.004337311,-0.020935059,-0.0118637085,0.045928955,-0.029373169,0.0007867813,-0.029830933,-0.03942871,-0.0044898987,-0.053741455,0.008415222,0.037353516,0.040100098,-0.030761719,0.003332138,-0.00021147728,0.003145218,-0.0181427,0.01083374,-0.017501831,0.014801025,0.022155762,-0.001036644,-0.026626587,-0.030471802,-0.020751953,-0.005153656,-0.039642334,-0.052490234,-0.01852417,-0.00082206726,-0.0067481995,-0.015914917,-0.029907227,-0.040496826,-0.0029296875,-0.03302002,0.010757446,0.0016183853,0.012886047,0.012794495,-0.027740479,-0.0005054474,0.011550903,-0.018432617,0.036102295,0.017959595,-0.009902954,-0.046447754,0.005012512,0.007701874,0.018692017,-0.011634827,-0.009529114,-0.0046195984,-0.025985718,-0.056671143,0.0057754517,-0.008384705,-0.0034809113,-0.011566162,0.007663727,-0.051483154,-0.0018568039,-0.020019531,0.0074653625,0.021453857,0.016815186,0.008216858,0.005344391,0.02468872,-0.005870819,-0.011657715,-0.035858154,0.013977051,0.010383606,0.007850647,0.034179688,0.038482666,0.00077438354,-0.035095215,0.011550903,0.013999939,0.015312195,-0.020828247,0.0018882751,-0.02859497,0.0151901245,-0.010383606,-0.013130188,-0.03652954,-0.0017032623,0.08239746,0.000854969,-0.013473511,-0.011810303,-0.019256592,0.022644043,0.035308838,-0.042236328,-0.006450653,-0.025360107,0.017105103,-0.02810669,-0.0010786057,-0.0010461807,0.025924683,-0.016693115,-0.05038452,-0.012207031,-0.011299133,-0.009056091,-0.059509277,-0.029159546,-0.0713501,0.0095825195,-0.012992859,-0.015853882,-0.004383087,0.010192871,-0.017333984,-0.074279785,0.0021247864,0.046691895,0.00381279,0.021697998,-0.0043754578,0.015533447,0.024963379,-0.038848877,0.0043563843,0.028900146,-0.025466919,-0.021743774,-0.024734497,0.017211914,-0.018493652,-0.010192871,0.009178162,0.0047302246,0.019195557,-0.009544373,0.0068244934,-0.011047363,0.026382446,-0.020004272,0.022369385,-0.00667572,-0.0074272156,0.03466797,-0.039520264,0.021102905,0.0054397583,-0.007774353,0.012283325,0.028823853,0.048431396,-0.039031982,-0.011886597,0.021850586,0.013084412,0.040374756,-0.018585205,0.043395996,0.009170532,-0.018920898,0.016281128,-0.006095886,-0.014099121,-0.028717041,-0.026687622,0.026626587,-0.0016059875,0.010757446,-0.012962341,0.013381958,0.014877319,0.004951477,0.013252258,-0.0016517639,-0.02444458,-0.028457642,-0.0007224083,0.002483368,0.0047454834,-0.0017242432,0.024673462,0.02658081,0.036224365,0.0112838745,-0.0128479,-0.002450943,0.030914307,-0.008583069,0.00055217743,0.031921387,0.0025920868,0.015434265,0.02418518,0.0065078735,-0.04525757,-0.01802063,-0.026290894,-0.017456055,-0.0064086914,-0.010108948,-0.014091492,-0.0057754517,0.004333496,-0.013870239,-0.029052734,0.008728027,-0.03567505,-0.025985718,-0.004169464,-0.011505127,0.025009155,0.0053482056,0.008590698,0.006412506,-0.006122589,0.04309082,0.0011940002,-0.017181396,0.047332764,0.0357666,0.018676758,-0.02418518,-0.0064582825,-0.008682251,-0.014183044,-0.00063848495,-0.044677734,0.0074005127,0.04925537,-0.02519226,0.0013961792,0.00013148785,0.0236969,-0.0015869141,0.00037050247,-0.0035190582,0.01889038,-0.009338379,0.036346436,-0.05142212,0.018417358,0.006465912,0.004047394,-0.016723633,-0.0061149597,-0.028289795,0.014221191,0.0015096664,-0.008071899,0.051208496,0.001698494,0.026473999,-0.018325806,-0.03152466,0.015274048,-0.0262146,-0.02470398,0.029708862,-0.011497498,-0.009254456,0.017929077,-0.014770508,0.031143188,-0.026992798,0.01348114,0.010253906,-0.004802704,-0.005836487,-0.02027893,-0.014472961,-0.006832123,-0.013893127,0.0015516281,-0.007381439,0.043060303,0.015602112,0.02748108,0.054656982,0.01776123,0.0041618347,-0.040649414,-0.03137207,-0.00094270706,-0.02293396,0.01398468,-0.009254456,0.055541992,0.03164673,0.008674622,0.03237915,0.026412964,0.034851074,0.00009936094,0.0048446655,-0.015136719,0.0151901245,-0.010360718,0.027954102,0.0001565218,0.04324341,-0.04638672,0.024520874,0.017807007,0.020401001,-0.025970459,0.034332275,0.05758667,0.01838684,-0.010131836,0.045196533,-0.0068626404,-0.006095886,-0.014541626,-0.019577026,0.04623413,0.012779236,0.04425049,0.049804688,0.008331299,-0.0036907196,0.026763916,-0.030532837,-0.02822876,0.060699463,0.030212402,-0.024475098,-0.013664246,0.0024795532,0.0056381226,-0.04864502,-0.025543213,0.031402588,-0.008033752,-0.00031471252,-0.0073165894,-0.01776123,-0.011138916,0.006046295,0.024765015,0.021224976,-0.0178833,0.030212402,0.028930664,-0.003921509,0.036254883,-0.006214142,0.031555176,-0.021347046,-0.034423828,0.017181396,0.02067566,-0.009124756,-0.0154418945,0.027862549,0.006389618,0.041107178,0.044036865,-0.023452759,0.0078048706,0.026626587,0.010612488,0.0024375916,0.062561035,0.03918457,0.019378662,0.04321289,0.027252197,0.035858154,-0.047302246,0.01727295,0.0060424805,0.0027999878,-0.007675171,-0.012077332,0.006477356,-0.020126343,0.028366089,-0.004386902,-0.00868988,0.025482178,0.02923584,-0.0076560974,-0.005256653,-0.006038666,0.0046691895,-0.02670288,-0.0041160583,0.015144348,-0.018005371,0.037017822,0.01247406,0.026611328,-0.029953003,0.021865845,-0.00071668625,-0.017211914,-0.0039367676,0.020599365,-0.0345459,0.009048462,-0.009147644,0.004459381,-0.047027588,0.015808105,0.032562256,-0.012207031,0.026290894,0.008331299,-0.00071430206,-0.008216858,0.02394104,0.00093221664,0.0044136047,-0.0063285828,-0.025299072,0.024597168,0.04498291,0.0021362305,0.008216858,-0.02432251,-0.0030136108,0.005001068,-0.011405945,0.0009675026,-0.011100769,-0.019073486,-0.012176514,0.011672974,0.035369873,0.02130127,0.049041748,-0.021118164,-0.013648987,0.014373779,0.037109375,0.0022735596,-0.00045609474,-0.01008606,0.031463623,-0.01902771,0.04486084,0.040863037,0.010147095,0.034698486,-0.006034851,-0.015686035,0.010032654,-0.005935669,0.0236969,-0.020355225,0.0034446716,-0.0014619827,0.03552246,-0.009841919,-0.03503418,0.005420685,-0.0127334595,-0.021728516,-0.018173218,0.020095825,0.0030117035,0.030136108,0.04626465,0.020614624,-0.029373169,0.06121826,-0.015380859,0.046173096,-0.00095939636,-0.011199951,0.05307007,0.021270752,0.0340271,0.014640808,0.01864624,-0.03488159,0.010681152,0.033172607,0.02784729,0.009063721,0.009864807,-0.011878967,0.042877197,-0.003364563,0.027786255,-0.0060577393,-0.0007510185,0.0069236755,0.0014591217,-0.0060539246,-0.0037555695,-0.0074005127,0.007572174,0.044067383,-0.02658081,-0.009170532,-0.021591187,-0.014015198,0.028045654,-0.012321472,0.0035037994,-0.006778717,-0.028625488,0.007232666,-0.02911377,-0.0234375,0.010635376,0.023803711,-0.046661377,-0.004283905,0.0054473877,0.022445679,-0.026168823,0.027328491,0.032226562,0.0023899078,0.0071144104,0.04953003,-0.009536743,0.03050232,-0.016326904,0.029708862,0.032104492,0.0132369995,-0.009391785,-0.0029850006,0.005970001,-0.010185242,0.01625061,0.03375244,-0.015670776,0.00026082993,-0.00034499168,-0.0011606216,0.0030231476,0.010925293,-0.0044898987,0.011962891,-0.014434814,-0.014015198,0.0040664673,0.0034313202,0.00409317,0.0017528534,-0.004863739,-0.009963989,0.011947632,0.035003662,0.022262573,-0.03768921,-0.0031909943,0.0026817322,0.012054443,-0.016616821,-0.012512207,0.00504303,-0.04135132,0.018554688,0.01676941,0.009170532,0.011924744,-0.029937744,-0.0004415512,0.022766113,0.011009216,0.012420654,0.005886078,-0.0053215027,0.014556885,-0.0073928833,-0.008422852,-0.00248909,-0.0064811707,0.011528015,0.029312134,-0.009628296,-0.030792236,0.030090332,0.004180908,0.009559631,0.00032019615,-0.008331299,0.026367188,-0.007671356,-0.00021326542,0.0014219284,0.017532349,-0.008155823,-0.010665894,-0.01663208,0.03491211,0.055999756,-0.007843018,-0.008087158,0.020004272,0.016494751,0.019012451,0.037322998,-0.0034294128,0.041748047,0.02267456,-0.01737976,-0.021621704,0.019683838,-0.010597229,-0.02520752,0.017791748,-0.014526367,-0.013755798,0.017593384,0.0077819824,-0.001452446,-0.03768921,-0.010276794,-0.009132385,-0.013931274,0.018554688,-0.015312195,0.013435364,-0.0256958,-0.009727478,0.002866745,-0.027404785,-0.0446167,-0.016204834,0.0048179626,-0.010810852,-0.055786133,0.009208679,-0.031341553,0.006980896,-0.020095825,-0.005317688,-0.014320374,0.017501831,-0.017120361,-0.014518738,0.00064468384,0.025054932,0.02796936,-0.0013523102,0.028900146,-0.026535034,-0.014427185,-0.029785156,0.012321472,-0.013343811,0.021148682,0.00032234192,0.03353882,0.023864746,-0.017349243,-0.00058078766,-0.011116028,-0.012237549,-0.01826477,-0.013153076,-0.027114868,0.023910522,0.015289307,-0.01209259,-0.00623703,0.039855957,-0.027374268,-0.014228821,0.027770996,0.047821045,0.011627197,0.029937744,-0.012458801,-0.007160187,-0.015403748,0.00025463104,-0.018798828,0.0072784424,0.018753052,0.0021820068,0.000004053116,0.011070251,0.02810669,-0.011413574,-0.00049972534,0.03704834,0.014129639,-0.0068130493,0.040893555,0.015533447,0.0029678345,-0.010169983,-0.013893127,0.021331787,0.042816162,0.009109497,0.014389038,-0.0042037964,-0.0018825531,-0.009483337,0.012313843,0.024108887,-0.023391724,-0.04663086,-0.015548706,-0.04220581,0.02330017,-0.0033359528,0.01209259,-0.007095337,0.010612488,-0.026550293,-0.032348633,-0.0099487305,0.029464722,0.020401001,-0.00699234,-0.014320374,0.014732361,0.010482788,-0.03277588,-0.007335663,-0.044433594,-0.04147339,-0.005180359,-0.014633179,0.022567749,0.01876831,-0.006214142,0.0019512177,-0.0017385483,0.0022830963,0.0015220642,0.025421143,-0.008277893,-0.0057029724,0.026275635,0.017150879,-0.012252808,0.013893127,-0.010467529,0.000729084,0.0121154785,-0.010391235,0.01828003,-0.01802063,0.03945923,-0.011459351,0.00011128187,0.029006958,-0.0105896,0.005001068,-0.028305054,0.0011320114,0.007904053,-0.0037975311,0.035858154,-0.032684326,-0.028533936,0.007774353,-0.017089844,-0.024841309,-0.00055122375,0.017211914,0.037231445,-0.010673523,0.046722412,-0.01574707,-0.008384705,0.014694214,0.013092041,-0.010910034,0.0033092499,0.026916504,0.0034446716,0.00008481741,-0.0069732666,0.0005078316,-0.031402588,-0.013999939,0.013160706,0.00070905685,-0.020690918,0.029281616,0.011016846,0.04937744,-0.010421753,0.016311646,0.011184692,0.00756073,0.03149414,0.0055999756,0.05065918,-0.0084991455,-0.030059814,0.0036392212,0.0063934326,-0.026367188,0.0057373047,-0.003780365,-0.0017156601,-0.041137695,0.0110321045,-0.009338379,0.021957397,-0.027709961,0.0082473755,-0.024536133,-0.011634827,-0.0463562,-0.009170532,-0.027359009,0.010444641,0.028259277,0.00063562393,0.030960083,-0.00014591217,-0.025283813,0.021774292,0.04626465,0.0015010834,-0.031585693,-0.028076172,0.012207031,0.0022735596,0.0035324097,0.0033931732,-0.025970459,-0.012298584,-0.0041122437,-0.013679504,0.0060272217,-0.0034770966,0.016860962,0.011558533,-0.0051231384,-0.0071754456,0.02507019,-0.0056381226,-0.015472412,0.009796143,0.006778717,0.03378296,0.038238525,-0.021575928,0.020050049,0.01625061,-0.045013428,0.057403564,-0.002166748,0.023361206,-0.014411926,0.004585266,-0.036865234,-0.026397705,-0.016555786,0.0031814575],"createdAt":"2026-04-18T18:50:48.339Z","updatedAt":"2026-04-22T21:31:10.467Z","lastSeenAt":"2026-04-22T21:31:10.467Z","tsv":"'/api/v1/payments/93':112 '/request':12,28 '0.02':11,27,76,133,136,191 '000':128 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '20':127 '300':150 '402':122 '402 payment API' 'Base network API' 'USDC micropayment API' 'accept':155 'access':118 'account':87 'across':52 'address':146 'advertis':164 'ai/ml':55 'analysi':168 'analyt':54 'api':5,14,21,30,39,84,117,201 'application/json':160 'attach':94 'avail':231 'base':8,24,67,129,139 'base-network' 'broad':44 'broader':162 'call':4,20 'caller':92 'catalog':45 'challeng':123 'classif':171 'connect':210 'convers':183 'crawl':234 'crypto-paid API' 'data':53,185 'detail':217 'doc':200 'document':195,226 'embed':172 'enabl':38 'endpoint':51,62,110,154,165 'estim':180 'exampl':230 'exchang':175 'extrem':197 'feed':174 'finance/web3':57 'gas':179 'generat':186 'geocod':181 'header':99 'howev':194 'i.e':135 'infer':56 'json-api' 'key':15,31,85 'limit':91 'list':114 'lowpaymentfee' 'lowpaymentfee.com':33 'made':144 'materi':235 'mean':82 'network':68,140 'no-api-key' 'offer':42 'openapi':221 'page':205 'pay':2,18,48 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':47 'payment':98,104,142 'per':3,19,49,77 'platform':6,22,40,163 'point':193 'post':156 'post-method' 'premium':116 'price':74,173,192,202 'prompt':212 'protocol':81 'quot':178 'rate':90,176 'readm':204 'render':207 'request':50,78,107,124,157 'request/response':224 'requir':16,32 'return':120,159 'schema':225 'second':151 'sentiment':167 'servic':60 'settl':64 'sign':102 'simpli':93 'spars':198 'spec':222 'specif':109 'summar':170 'technic':216 'text':169 'timeout':152 'token':177 'uniform':73 'unit':130 'usag':229 'usdc':70,103,132,134 'usdc-settlement' 'use':69 'util':59 'valid':182 'via':9,25 'wallet':211 'x':97 'x-payment':96 'x402':10,26,37,80 'x402 API' 'x402-enabled':36 'x402-payment'","prices":[{"id":"db6aa10e-f115-41c7-b6b2-b82bfa7a0ef2","listingId":"2a815458-1b36-43ad-a7f3-4d20c8362e3d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/payments/93","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:48.339Z"}],"sources":[{"listingId":"2a815458-1b36-43ad-a7f3-4d20c8362e3d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/93","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:48.339Z","lastSeenAt":"2026-04-22T21:31:10.467Z"}],"details":{"listingId":"2a815458-1b36-43ad-a7f3-4d20c8362e3d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/93 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform pricing of $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0.02 USDC) on Base network with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/payments/93"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/93"}],"useCases":["Accessing premium API endpoints without creating accounts or managing API keys","Making one-off API calls with per-request USDC micropayments on Base","Agent-driven workflows that need frictionless, programmatic API access with crypto settlement"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents that need to autonomously purchase API calls via x402","Users already holding USDC on the Base network"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","High-volume consumers who prefer subscription or bulk pricing over per-call payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:05.929Z"},"updatedAt":"2026-04-22T21:31:10.467Z"}}