{"id":"8a5a83f0-8993-4138-be3b-0d1b32a9b5fa","shortId":"tvh8VM","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API marketplace that exposes a broad set of endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text 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, payable in USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no upfront commitments.\n\nThe specific endpoint `/api/v1/messages/194` is listed as \"Premium API Access\" and returns a standard x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). Payments are settled on-chain to the specified wallet address. The endpoint accepts HTTP POST requests and returns application/json responses.\n\nNote that while the landing page advertises many endpoints across multiple categories, the crawled documentation is extremely thin — the /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no further detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The purpose of the `/messages/194` endpoint specifically is unclear; it may be a generic message or content retrieval endpoint, but this is not documented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-apis"],"categories":["llm","data","finance","geo"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","cheap api","402 payment api"],"warnings":["No OpenAPI or schema documentation available for any endpoint","The specific purpose and expected input/output of /api/v1/messages/194 is undocumented","All secondary pages (/api, /pricing, /README) returned only 'Connect wallet' with no content","No request or response examples are available anywhere in the crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/messages/194","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/messages/194","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, confirming pricing and payment details. However, there is no OpenAPI spec, no request/response schema, no usage examples, and the specific purpose of /api/v1/messages/194 is undocumented. The /api, /pricing, and /README pages are all blank 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":"2026-04-21T23:09:44.874Z","embedding":[-0.024398804,-0.02458191,0.05001831,0.020767212,0.0011606216,-0.028213501,-0.035217285,0.026565552,0.064819336,-0.06842041,0.011619568,-0.0501709,-0.039154053,-0.027282715,-0.0009775162,0.0140686035,-0.008865356,0.006378174,-0.034576416,0.03866577,0.03390503,-0.020065308,-0.032165527,0.016708374,-0.013999939,-0.037109375,-0.0009841919,-0.00003927946,-0.01689148,-0.03475952,0.056854248,-0.024658203,-0.0075569153,-0.00013315678,-0.016540527,-0.0000076293945,-0.004673004,0.023544312,0.029800415,-0.022445679,-0.012428284,-0.051330566,0.002035141,-0.010696411,-0.05355835,-0.005760193,0.016174316,-0.004737854,0.017074585,0.015144348,-0.041992188,-0.0054969788,0.0021095276,0.015899658,-0.007637024,-0.0013256073,-0.0036239624,-0.008888245,0.022399902,0.006843567,0.0037879944,-0.05557251,-0.02116394,-0.024658203,-0.009674072,0.053222656,-0.015594482,0.047424316,-0.0121154785,0.061798096,0.044036865,0.036010742,0.02658081,-0.00187397,0.00022375584,-0.011978149,-0.020889282,0.06530762,-0.023117065,-0.03778076,-0.013870239,-0.009857178,-0.068847656,0.0024375916,-0.013687134,-0.049224854,-0.011924744,0.030654907,-0.035827637,0.035949707,-0.072631836,-0.018325806,-0.014778137,-0.0066986084,0.012542725,-0.021759033,-0.003282547,0.011787415,-0.007335663,0.013183594,-0.0060806274,-0.056121826,0.0048103333,0.007835388,0.029525757,0.029937744,0.037475586,0.020736694,0.0035305023,-0.0129776,-0.062927246,0.016296387,-0.010498047,-0.011039734,0.0025177002,0.014846802,-0.011604309,0.015045166,-0.02722168,0.014381409,-0.055633545,0.048065186,0.0076789856,0.013389587,0.0021896362,-0.054626465,-0.0063209534,0.008110046,-0.029342651,-0.010650635,0.013122559,0.013870239,0.024398804,-0.025512695,-0.039398193,0.014190674,-0.0135650635,-0.022994995,-0.051818848,-0.027023315,0.037078857,-0.025482178,0.014877319,0.026657104,-0.0826416,-0.027160645,-0.048553467,-0.007457733,-0.022094727,-0.020858765,0.00333786,0.034088135,-0.020965576,-0.019699097,-0.012817383,-0.02166748,0.0055236816,0.022323608,-0.022506714,0.032470703,-0.0141067505,0.01852417,0.015571594,0.00655365,0.011817932,0.017227173,0.0206604,-0.09674072,-0.07714844,-0.028701782,-0.012580872,-0.036376953,-0.02204895,-0.0011558533,-0.0064697266,-0.05987549,-0.0064315796,-0.021942139,-0.0031757355,-0.035736084,0.017303467,-0.030197144,0.003627777,-0.02029419,-0.052001953,-0.025100708,-0.020217896,0.06695557,0.025817871,0.025466919,0.018692017,-0.013999939,0.07336426,0.02798462,-0.011222839,-0.016967773,0.019882202,-0.019226074,0.017303467,-0.007167816,0.008964539,-0.033569336,0.053009033,0.04953003,-0.007820129,-0.024658203,-0.011222839,-0.039215088,-0.045318604,-0.042999268,0.028305054,-0.00012218952,-0.00059604645,0.039489746,-0.036468506,-0.044891357,-0.019454956,0.015182495,-0.011161804,0.057037354,0.0076446533,0.01449585,0.027923584,-0.0025939941,-0.044555664,0.036743164,0.03616333,0.0072631836,-0.026870728,-0.018569946,0.046173096,0.025756836,-0.020004272,0.0031032562,-0.010223389,0.030395508,-0.0025596619,0.014434814,0.02218628,0.001991272,-0.018463135,-0.028244019,-0.0029277802,0.022476196,-0.003112793,-0.018127441,-0.029403687,-0.09094238,0.048706055,0.034454346,0.061920166,-0.020523071,0.0021686554,-0.021774292,-0.0069732666,-0.0647583,0.047546387,0.05895996,0.008003235,-0.011268616,0.019378662,0.0020809174,-0.034820557,0.008453369,-0.009346008,-0.045928955,-0.005420685,0.019348145,-0.06036377,-0.0118637085,0.016906738,0.009857178,0.054473877,0.010643005,-0.05407715,-0.019454956,-0.0064048767,-0.009346008,-0.009918213,0.0040512085,-0.007843018,0.014564514,0.022064209,-0.011886597,0.008506775,-0.000351429,0.019332886,-0.013710022,0.00083589554,-0.017578125,-0.032104492,-0.0068473816,0.0011672974,-0.072143555,0.015113831,0.0022850037,0.07446289,-0.037597656,0.020004272,-0.0070762634,0.007663727,0.04272461,0.008392334,-0.051757812,0.0076522827,0.03161621,0.028198242,0.038757324,0.026763916,-0.04550171,-0.004234314,0.072509766,-0.0093307495,-0.0053215027,-0.0099487305,-0.0030822754,0.041870117,-0.027282715,-0.051330566,-0.03842163,-0.0065193176,-0.027893066,0.030014038,-0.016479492,-0.007583618,-0.018707275,0.01348114,-0.015235901,0.0020103455,-0.02166748,0.025802612,-0.016952515,0.026504517,0.0051574707,-0.029449463,0.011505127,0.002916336,-0.0043640137,0.0074920654,0.032684326,0.017730713,-0.009002686,-0.03540039,-0.02166748,-0.013595581,-0.025634766,0.0075912476,0.026428223,0.022109985,0.052520752,-0.02255249,-0.0008659363,0.036712646,0.016098022,0.043823242,-0.01436615,-0.0056762695,-0.047454834,-0.033935547,-0.028808594,-0.03717041,0.012107849,0.023376465,-0.009559631,0.056427002,0.0016670227,-0.035858154,-0.045959473,0.036224365,-0.04119873,-0.0065193176,0.026519775,-0.011604309,-0.03640747,-0.012252808,0.0015201569,-0.00012910366,0.030395508,0.007335663,0.034210205,0.06958008,0.030441284,-0.012504578,0.010505676,-0.0006942749,0.039978027,0.015090942,-0.020904541,-0.023101807,-0.0042304993,0.03643799,-0.014472961,-0.032470703,-0.06173706,0.057525635,0.039123535,0.049591064,0.0020561218,0.0134887695,0.039215088,0.0007534027,0.0009675026,-0.033447266,-0.011520386,-0.033935547,-0.02619934,0.032287598,-0.01159668,-0.0012807846,-0.027175903,0.045959473,-0.011405945,0.020141602,-0.02520752,0.026275635,-0.013214111,0.02128601,-0.0002501011,-0.00074768066,0.047088623,0.078430176,-0.054626465,0.013946533,0.02670288,-0.036712646,0.008407593,0.053894043,-0.025039673,-0.0063552856,-0.06317139,-0.027862549,-0.004142761,-0.002412796,-0.055725098,0.00730896,0.004383087,0.027313232,0.049987793,-0.02154541,-0.017562866,-0.0017366409,-0.007183075,-0.08099365,-0.0060043335,-0.04159546,0.005569458,0.033935547,-0.01171875,-0.006801605,-0.014671326,-0.013534546,-0.031143188,0.0077590942,0.022659302,-0.020935059,-0.047821045,0.05444336,0.015792847,0.024719238,0.01424408,0.033966064,0.021591187,0.023483276,0.04763794,0.004776001,-0.027053833,-0.057403564,0.008270264,-0.054016113,0.023895264,0.026657104,-0.019317627,0.00024187565,-0.0048103333,-0.03289795,-0.040405273,0.012786865,-0.029968262,0.004169464,0.01612854,-0.033172607,-0.034362793,-0.056488037,-0.018173218,-0.008049011,0.07659912,0.008987427,-0.02029419,-0.051605225,0.0036411285,0.01586914,0.0027542114,0.025863647,-0.015167236,-0.02279663,-0.017318726,-0.0413208,-0.004886627,-0.023208618,0.013534546,-0.007511139,-0.012741089,0.019348145,-0.0034809113,0.028137207,0.0004963875,0.002008438,0.024490356,-0.029830933,-0.006248474,-0.0037384033,0.03967285,0.011497498,-0.012588501,-0.029510498,0.028427124,0.019714355,0.036254883,-0.02407837,-0.00034689903,0.015357971,0.015541077,0.03289795,-0.023498535,-0.009666443,-0.01020813,-0.06072998,-0.05606079,0.028869629,-0.011398315,0.03250122,0.02279663,0.023864746,0.015594482,-0.01763916,0.012535095,-0.0030384064,-0.037994385,-0.0061187744,-0.024642944,-0.02909851,-0.025558472,-0.00047016144,-0.02848816,0.019012451,-0.009109497,-0.0016307831,0.023406982,-0.02204895,0.018112183,0.014709473,-0.007247925,0.028915405,-0.0010004044,0.031463623,0.0435791,-0.004299164,-0.050933838,0.03314209,-0.0044288635,0.017318726,-0.010185242,0.05090332,0.048797607,-0.012229919,-0.018981934,-0.0029582977,0.0021305084,-0.025405884,-0.0007891655,0.0069732666,0.008476257,-0.012664795,-0.033996582,0.007835388,0.004798889,-0.023239136,-0.025100708,0.02229309,0.020355225,-0.029907227,0.026611328,0.021896362,0.050109863,-0.031341553,0.006832123,0.009796143,0.036071777,0.047576904,0.0024757385,-0.00762558,0.0035133362,-0.005168915,0.010231018,-0.0181427,-0.006248474,0.014724731,-0.0064735413,0.01940918,0.027389526,0.019561768,-0.02468872,-0.025543213,0.007381439,-0.0076179504,-0.018829346,0.0032577515,0.009338379,0.0236969,-0.025100708,0.018417358,0.011695862,-0.017745972,-0.018417358,-0.008003235,0.02079773,-0.014549255,-0.0135650635,0.036102295,0.010673523,0.01309967,-0.04763794,-0.0062332153,0.0007953644,0.014190674,-0.02168274,-0.051239014,-0.049987793,0.012611389,0.024490356,0.027175903,0.029510498,0.032714844,-0.014122009,-0.0006828308,0.013893127,0.006801605,-0.016357422,-0.009506226,-0.03829956,-0.024612427,0.0010051727,0.008140564,-0.03756714,0.016983032,-0.009674072,-0.032287598,-0.002632141,-0.009399414,-0.0020217896,-0.019073486,0.016448975,0.048217773,0.0051078796,0.020446777,-0.015609741,-0.029937744,-0.008735657,0.006629944,0.019454956,-0.060150146,0.028457642,-0.0039482117,0.0069732666,0.0040359497,0.014213562,0.009613037,0.023773193,0.012184143,0.027114868,-0.034240723,0.045806885,-0.026260376,0.021255493,0.005947113,-0.044006348,-0.01285553,-0.043884277,-0.0016183853,0.031585693,-0.027282715,-0.018112183,-0.03277588,-0.037109375,-0.008117676,-0.04953003,0.016357422,0.040252686,0.049041748,-0.02166748,0.0032691956,-0.0049972534,-0.0020008087,-0.012878418,0.016174316,0.0033245087,0.017364502,0.027893066,0.003376007,-0.0206604,-0.028030396,-0.029907227,-0.008743286,-0.05114746,-0.060943604,-0.012016296,0.0056762695,-0.0025844574,0.004459381,-0.020721436,-0.032104492,-0.0032463074,-0.038909912,0.020950317,0.0021896362,0.021377563,0.0023460388,-0.023544312,0.009681702,0.013977051,-0.01171875,0.029510498,-0.0033893585,-0.0049972534,-0.032470703,0.003862381,0.023666382,0.018371582,-0.0010757446,-0.00085020065,-0.008796692,-0.017318726,-0.043426514,-0.0034809113,-0.009635925,-0.0181427,-0.013877869,0.0029964447,-0.041046143,0.0037193298,-0.011009216,-0.009773254,0.036895752,-0.0063476562,-0.0016202927,-0.018508911,0.009284973,-0.011390686,-0.017700195,-0.024993896,0.01399231,0.011634827,0.0018110275,0.028320312,0.044128418,0.011016846,-0.013633728,0.02166748,0.009918213,0.018066406,-0.017059326,0.013786316,-0.030578613,0.018753052,-0.018341064,-0.0074157715,-0.031463623,-0.0011348724,0.0758667,-0.004005432,-0.010223389,-0.013687134,-0.012672424,0.007663727,0.030014038,-0.04699707,0.0005927086,-0.03201294,0.021972656,-0.02645874,0.024749756,0.009384155,0.023971558,-0.010231018,-0.04498291,-0.004890442,0.0014162064,-0.0060577393,-0.06524658,-0.025314331,-0.057769775,0.006755829,-0.0025997162,-0.025558472,-0.0010280609,0.011711121,-0.012420654,-0.08392334,0.0021972656,0.047058105,-0.0069465637,0.017822266,-0.0037250519,0.0073509216,0.017562866,-0.020324707,0.00032877922,0.0345459,-0.039764404,-0.015487671,-0.022277832,0.03201294,0.004863739,-0.015533447,-0.00070619583,0.0010585785,0.028915405,-0.0020713806,0.015533447,-0.017791748,0.03277588,-0.026397705,0.016113281,-0.0076522827,-0.00844574,0.050872803,-0.054870605,0.026870728,0.016708374,-0.0044136047,0.0015354156,0.03543091,0.038269043,-0.035308838,-0.011932373,0.0037345886,0.0023117065,0.0340271,-0.019012451,0.039916992,0.011192322,-0.022918701,0.010620117,0.0033721924,-0.007987976,-0.036346436,-0.034118652,0.03237915,-0.000079751015,-0.000013113022,-0.022201538,0.005722046,0.025314331,-0.0060691833,0.0077705383,-0.007194519,-0.03463745,-0.033569336,-0.005016327,0.001991272,0.008811951,0.0039787292,0.0206604,0.0027885437,0.029556274,0.008155823,-0.009597778,-0.004436493,0.03845215,0.002111435,0.003107071,0.019302368,0.008026123,0.024642944,0.02407837,0.014930725,-0.042388916,-0.008018494,-0.023376465,-0.016647339,0.020858765,-0.014442444,-0.0013799667,0.0061569214,0.0062332153,-0.009757996,-0.02381897,0.0054969788,-0.016082764,-0.032714844,-0.0053520203,0.0011310577,0.024017334,0.007522583,0.01424408,0.016815186,-0.016448975,0.053955078,-0.006668091,-0.02470398,0.019882202,0.023880005,0.020996094,-0.04055786,-0.0038890839,0.0016365051,-0.011009216,0.005393982,-0.036712646,0.027679443,0.05038452,-0.016738892,0.013130188,0.010169983,0.03161621,-0.022399902,-0.0063285828,-0.0025539398,0.012306213,-0.009284973,0.03161621,-0.05697632,0.028213501,0.0024166107,0.0039482117,-0.0128479,-0.021347046,-0.033599854,0.021560669,-0.0057792664,-0.008613586,0.034576416,0.0063285828,0.019683838,-0.010238647,-0.007987976,-0.0017604828,-0.030090332,-0.02230835,0.024017334,0.0018806458,0.0101623535,0.010231018,-0.020828247,0.02520752,-0.03604126,-0.0037288666,0.0118255615,0.003118515,-0.0124435425,-0.01838684,-0.013015747,0.011222839,-0.030334473,-0.0044555664,-0.004863739,0.055908203,0.014526367,0.038635254,0.02217102,0.00075626373,-0.0010728836,-0.04019165,-0.027542114,-0.011833191,-0.019119263,0.032073975,-0.023544312,0.036010742,0.045715332,-0.015060425,0.027389526,0.038970947,0.039154053,0.003967285,0.02432251,-0.016601562,0.010795593,-0.025299072,0.026657104,0.011398315,0.032989502,-0.026290894,0.025878906,0.033843994,0.013160706,-0.015037537,0.031280518,0.061157227,0.023010254,0.011352539,0.032348633,0.0005259514,-0.01889038,0.009651184,-0.03866577,0.048614502,0.0046157837,0.06591797,0.04257202,-0.00014305115,0.004890442,0.017929077,-0.03100586,-0.024139404,0.05505371,0.023803711,-0.023406982,-0.008117676,-0.0068740845,-0.0007634163,-0.019348145,-0.034362793,0.024429321,-0.02078247,0.01158905,-0.024475098,-0.010147095,-0.005870819,0.003774643,0.022140503,0.012466431,-0.003118515,0.018859863,0.027114868,0.003004074,0.028884888,0.00630188,0.022842407,-0.02734375,-0.026626587,0.032073975,0.00674057,-0.0031337738,0.006385803,0.029403687,0.009490967,0.044006348,0.03540039,-0.03189087,-0.0009613037,0.037139893,0.004032135,0.009010315,0.05505371,0.03225708,0.012451172,0.033172607,0.037902832,0.036102295,-0.024841309,0.020523071,0.0005426407,-0.0003092289,-0.007896423,-0.00806427,0.015792847,0.008346558,0.010932922,-0.008094788,-0.023284912,0.021835327,0.014877319,-0.011352539,-0.011604309,-0.0043945312,0.0104599,-0.014595032,0.0021743774,0.017028809,-0.025787354,0.02760315,0.00062561035,0.023803711,-0.014579773,0.016616821,0.0049095154,-0.024124146,-0.0055618286,0.026382446,-0.034576416,0.015853882,0.0030269623,-0.0025691986,-0.055786133,0.022659302,0.023880005,-0.016647339,0.030471802,0.015945435,-0.016586304,0.008026123,0.011726379,0.0005249977,0.0010213852,0.00289917,-0.019012451,0.029266357,0.035003662,0.0054092407,0.014846802,-0.016448975,-0.0234375,0.0056648254,-0.0019607544,-0.0060691833,-0.0103302,-0.018722534,-0.009033203,0.022888184,0.02633667,0.035003662,0.033477783,-0.019378662,-0.014831543,0.014205933,0.029937744,0.004009247,-0.0024337769,0.002292633,0.013343811,-0.028198242,0.045684814,0.052215576,0.024871826,0.049316406,0.0053634644,0.0024375916,0.006011963,-0.0064888,0.020217896,-0.026870728,0.006729126,-0.004211426,0.026535034,-0.019515991,-0.049346924,0.02444458,-0.01687622,-0.028305054,-0.017211914,0.020553589,-0.0073013306,0.042999268,0.039123535,0.016708374,-0.03225708,0.0602417,-0.0090789795,0.042419434,-0.0023727417,-0.029418945,0.037200928,0.022628784,0.031219482,0.011001587,0.019042969,-0.045562744,0.008163452,0.04324341,0.01852417,0.013442993,-0.011947632,-0.01247406,0.038024902,-0.004863739,0.019897461,-0.011054993,0.0121536255,0.014350891,-0.0059394836,-0.019592285,-0.01210022,0.0011558533,-0.00003439188,0.0491333,-0.0056991577,-0.0077667236,-0.024429321,-0.010482788,0.02104187,-0.0035114288,-0.0012989044,-0.0051498413,-0.03152466,0.00819397,-0.039154053,-0.021881104,0.013000488,0.010910034,-0.04269409,-0.015289307,0.02166748,0.012046814,-0.03137207,0.023452759,0.016616821,0.0078048706,-0.0010404587,0.044647217,-0.02281189,0.02331543,-0.018829346,0.023773193,0.04147339,0.008636475,-0.025848389,0.001001358,0.012214661,-0.0058021545,0.018722534,0.036895752,-0.004962921,0.01096344,-0.0014305115,-0.0077400208,0.0062179565,-0.0050239563,-0.0134887695,0.0051879883,-0.0042419434,-0.00440979,0.010719299,0.007698059,-0.0036640167,0.016677856,-0.004501343,-0.021499634,0.016525269,0.042144775,0.024353027,-0.0345459,-0.0014476776,0.009681702,-0.010261536,-0.028625488,-0.018112183,0.0053215027,-0.025268555,0.0018606186,0.024368286,0.011146545,0.030426025,-0.020431519,-0.0020809174,0.017364502,-0.0016946793,0.015686035,0.006954193,-0.013137817,0.0066986084,-0.020874023,-0.004875183,-0.018096924,-0.008239746,0.012580872,0.026321411,-0.012771606,-0.024993896,0.023208618,-0.0033950806,0.0178833,-0.009277344,-0.0075035095,0.017425537,-0.0036907196,-0.018295288,-0.00053071976,0.029373169,-0.008758545,-0.011734009,-0.010902405,0.031921387,0.043914795,-0.01979065,-0.006755829,0.027374268,0.023529053,0.028915405,0.0501709,0.014846802,0.04147339,0.023635864,-0.017547607,-0.013259888,0.017669678,0.0004968643,-0.01361084,0.017349243,-0.0062294006,-0.0146865845,0.016159058,-0.00021159649,0.0018291473,-0.03125,-0.017044067,-0.018356323,-0.035247803,0.013549805,0.0036411285,0.017562866,-0.021118164,-0.0038089752,0.0036373138,-0.041015625,-0.057617188,-0.008392334,-0.008033752,-0.0051651,-0.060455322,0.0007548332,-0.02998352,0.017547607,-0.011657715,-0.00036978722,-0.02407837,0.021102905,-0.014320374,-0.0054359436,-0.0058403015,0.02255249,0.035247803,0.010520935,0.014846802,-0.026367188,-0.016647339,-0.021957397,0.025527954,-0.023422241,0.02671814,0.0051231384,0.028884888,0.017044067,-0.0079193115,0.0026817322,-0.017959595,-0.0061569214,-0.011924744,-0.008918762,-0.024734497,0.019073486,0.0076446533,-0.0138168335,-0.0029010773,0.025131226,-0.024368286,-0.007843018,0.026062012,0.040863037,0.0030593872,0.025650024,-0.020492554,0.0056114197,-0.01802063,-0.0064697266,-0.011268616,0.0056495667,0.012458801,0.009140015,-0.005580902,0.0096588135,0.01953125,-0.0067710876,-0.008964539,0.015640259,0.014595032,-0.00315094,0.030395508,0.028137207,0.0055503845,-0.017150879,-0.024230957,0.028198242,0.043060303,0.007297516,0.014320374,-0.0069007874,0.017181396,-0.015975952,-0.00063943863,0.014472961,-0.023117065,-0.031829834,-0.019454956,-0.02859497,0.02859497,-0.010314941,0.0059165955,-0.005748749,0.0040016174,-0.013908386,-0.03265381,-0.013710022,0.014297485,0.0071029663,-0.008682251,-0.0033035278,0.0082473755,0.016616821,-0.023422241,-0.008262634,-0.036895752,-0.038513184,0.0010099411,-0.010940552,0.016189575,0.0082473755,-0.000705719,-0.010818481,-0.0036716461,0.0033493042,-0.019470215,0.022918701,-0.004890442,-0.0055351257,0.025848389,0.022262573,-0.02331543,0.016525269,-0.012825012,-0.0051994324,0.015357971,-0.011062622,0.02166748,-0.0129776,0.04397583,0.0026550293,-0.010513306,0.04107666,0.011062622,0.02670288,-0.028640747,0.0006117821,0.009895325,-0.011886597,0.044555664,-0.019317627,-0.013618469,0.0014162064,-0.014175415,-0.02809143,0.009567261,0.018234253,0.028167725,-0.0039520264,0.055267334,-0.007068634,-0.009056091,0.002916336,0.0107803345,-0.0124435425,0.0012960434,0.028213501,0.016693115,-0.0036354065,-0.012771606,-0.00299263,-0.04446411,-0.002292633,0.013618469,-0.00013411045,-0.00806427,0.023971558,0.010215759,0.03817749,-0.006385803,0.014045715,0.003025055,0.0057258606,0.032196045,0.004058838,0.045288086,-0.011398315,-0.03552246,-0.0031108856,0.0032424927,-0.016342163,0.0065345764,-0.018005371,-0.00894928,-0.040618896,0.01436615,0.0010938644,0.021453857,-0.008895874,0.017913818,-0.026977539,-0.019561768,-0.042388916,-0.015022278,-0.04586792,0.0060577393,0.027359009,-0.003446579,0.03161621,0.00655365,-0.019226074,0.026733398,0.049346924,-0.0012149811,-0.02909851,-0.0104599,0.009819031,-0.006664276,0.010223389,0.017562866,-0.016235352,-0.023406982,-0.0058288574,-0.018005371,0.017242432,-0.014015198,0.016647339,0.022659302,-0.0037994385,-0.003358841,0.03942871,-0.014755249,0.009986877,0.020065308,0.0010147095,0.028671265,0.027755737,-0.014526367,0.023284912,0.014778137,-0.056610107,0.06549072,-0.011787415,0.040649414,-0.016738892,0.021194458,-0.04107666,-0.020477295,-0.010650635,0.006664276],"createdAt":"2026-04-21T18:32:26.823Z","updatedAt":"2026-04-22T02:32:07.833Z","lastSeenAt":"2026-04-22T02:32:07.833Z","tsv":"'/api':192 '/api/v1/messages/194':122 '/messages/194':226 '/pricing':193 '/readme':195 '/request':19,38 '0.02':18,37,95,145 '000':140 '20':139 '402 payment api' '6':150 'accept':165 'access':128 'across':54,182 'address':162 'advertis':179 'ai':12,31,64 'ai-inference' 'analysi':68 'analyt':58 'api':5,24,45,110,127 'application/json':171 'avail':221 'base':8,27,103,141 'base network api' 'broad':50 'call':4,23 'categori':56,184 'chain':157 'challeng':134 'cheap api' 'classif':71 'classification' 'commit':118 'connect':201 'content':238 'convers':88 'crawl':186 'data':11,30,57,61 'data-analytics' 'decim':151 'detail':207 'document':187,216,245 'embed':72 'embeddings' 'enabl':44 'endpoint':16,35,53,91,121,164,181,227,240 'estim':82 'exampl':220 'exchang':77 'export':62 'expos':48 'extrem':189 'feed':76 'financ':13,32,73 'finance-data' 'four':55 'gas':81 'generat':89 'generic':235 'geocod':86 'geocoding' 'http':166 'infrastructur':84 'insight':63 'key':111 'land':177 'learn':66 'limit':114 'list':124 'low payment fee' 'lowpaymentfee.com':39 'machin':65 'mani':180 'marketplac':46 'maxamountrequir':137 'may':232 'messag':236 'metric':59 'micropayment api' 'multipl':183 'network':104 'note':173 'offer':10,29 'on-chain':155 'openapi':211 'page':178,196 'pay':2,21 'pay per call api' 'pay-per-cal':1,20 'pay-per-call' 'payabl':98 'payment':152 'per':3,22,96 'platform':6,25 'post':167 'premium':126 'price':75,93 'prompt':203 'protocol':108 'purpos':223 'quot':80 'rate':78,113 'report':60 'request':97,168 'request/response':214 'respons':172 'retriev':239 'return':130,170,198 'schema':215 'sentiment':67 'sentiment-analysis' 'set':51 'settl':154 'sinc':147 'spec':212 'specif':120,228 'specifi':160 'standard':132 'summar':70 'text':69 'text-summarization' 'thin':190 'token':79 'unclear':230 'unit':142 'upfront':117 'usag':219 'usd':146 'usdc':9,28,100,144,148 'usdc api' 'usdc-base' 'use':149 'util':15,34,85 'utility-apis' 'valid':87 'via':105 'wallet':161,202 'web3':74 'x402':43,107,133 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"13188b93-76e7-4f5f-aa70-d47b07df0846","listingId":"8a5a83f0-8993-4138-be3b-0d1b32a9b5fa","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/messages/194","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:26.823Z"}],"sources":[{"listingId":"8a5a83f0-8993-4138-be3b-0d1b32a9b5fa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/messages/194","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:26.823Z","lastSeenAt":"2026-04-22T02:32:07.833Z"}],"details":{"listingId":"8a5a83f0-8993-4138-be3b-0d1b32a9b5fa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/messages/194 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge for /api/v1/messages/194 specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/messages/194"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key registration","Retrieving real-time financial data such as token quotes, gas estimates, and exchange rates on a per-call basis","Running utility operations like geocoding, validation, and data conversion with micropayments"],"bestFor":["Agents or developers who want instant, keyless API access via crypto micropayments","Low-volume or sporadic API consumers who prefer pay-per-use over subscriptions","Web3-native applications that can settle USDC payments on Base"],"notFor":["High-volume production workloads that need guaranteed SLAs and detailed documentation","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:00.413Z"},"updatedAt":"2026-04-22T02:32:07.833Z"}}