{"id":"38835fdd-4c9f-4baa-8eeb-4adc968f2632","shortId":"NXvSEb","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are paid per-request using the x402 protocol, settling in USDC on the Base network. The specific endpoint at `/api/v1/transactions/298` is labeled \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call.\n\nThe platform advertises no API keys, no rate limits, and instant access. Payments are made inline via the x402 `X-PAYMENT` header. The site lists four categories of APIs: 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 listed endpoints share the same $0.02 per-request pricing.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The specific functionality behind the `/api/v1/transactions/298` path is unclear; it may be a transaction lookup or a generic premium endpoint. Without documentation or example responses, the actual behavior of this endpoint cannot be confirmed.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-data","geocoding","utility-services"],"categories":["api-platform","ai","finance","data"],"synonyms":["pay-per-call API","x402 API","micropayment API","USDC API","Base network API","low fee API","crypto payment API"],"warnings":["No OpenAPI or schema documentation available — endpoint behavior must be discovered empirically","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' stub with no content","The specific purpose and expected input/output of /api/v1/transactions/298 is unclear from available materials","No request or response examples could be sourced"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/298","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/transactions/298","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The specific purpose of /api/v1/transactions/298 is ambiguous. The docs, pricing, and README pages are all empty stubs.","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":"2026-04-19T13:03:04.623Z","embedding":[-0.028884888,-0.03857422,0.0357666,0.018692017,0.0077667236,-0.022979736,-0.031433105,0.022659302,0.070617676,-0.06329346,0.024673462,-0.047576904,-0.031402588,-0.031707764,-0.008666992,0.005695343,-0.008613586,0.012191772,-0.037200928,0.03237915,0.02885437,-0.012367249,-0.03829956,0.013183594,-0.00944519,-0.015266418,-0.008506775,-0.0037994385,-0.01902771,-0.042633057,0.045928955,-0.029541016,0.002790451,0.0009417534,-0.009399414,-0.0158844,0.0045318604,0.034362793,0.024871826,-0.008277893,-0.0049591064,-0.0647583,-0.002506256,-0.021408081,-0.061340332,0.0021839142,0.010116577,-0.02130127,0.015991211,0.0027885437,-0.043029785,-0.011802673,-0.014549255,0.0067481995,0.00356102,0.006893158,-0.005344391,-0.009140015,0.014198303,0.009162903,-0.013504028,-0.060150146,-0.015357971,-0.019195557,0.0026855469,0.056854248,-0.006626129,0.042419434,0.0025501251,0.059417725,0.035369873,0.0473938,0.026504517,0.018005371,0.013710022,-0.0030975342,-0.01158905,0.054229736,-0.017868042,-0.033416748,-0.00491333,-0.0028305054,-0.059936523,-0.003686905,-0.015335083,-0.04916382,-0.017410278,0.019348145,-0.030029297,0.027954102,-0.07879639,0.00774765,-0.009231567,-0.0044441223,0.002752304,-0.01121521,-0.007511139,0.015586853,-0.0058403015,0.009559631,-0.005092621,-0.044891357,0.02558899,0.01309967,0.040039062,0.047821045,0.018814087,0.015533447,0.013999939,-0.008056641,-0.023391724,0.010025024,-0.007358551,-0.012542725,0.0014228821,0.006034851,-0.0184021,0.016189575,-0.024993896,0.022827148,-0.052459717,0.056152344,0.017837524,0.01260376,0.0016021729,-0.051574707,-0.011299133,0.013641357,-0.030029297,-0.00995636,0.020095825,0.01777649,0.021591187,-0.021347046,-0.029205322,0.0034866333,-0.022216797,-0.0045776367,-0.056915283,-0.04272461,0.042663574,-0.022857666,0.023025513,0.0418396,-0.10021973,-0.012962341,-0.04031372,0.0028095245,-0.023803711,-0.0119018555,0.0069465637,0.022232056,-0.017623901,-0.022705078,-0.021987915,-0.027786255,-0.0009059906,0.044921875,-0.008811951,0.04257202,-0.027420044,0.024734497,0.008201599,0.008926392,0.008056641,0.022491455,-0.00051259995,-0.07873535,-0.08215332,-0.020614624,0.007686615,-0.025405884,-0.032928467,0.0058555603,-0.012123108,-0.082214355,-0.017578125,-0.022476196,-0.004131317,-0.039733887,-0.00762558,-0.029037476,0.015335083,-0.014549255,-0.050811768,-0.028778076,-0.031677246,0.06427002,0.02973938,0.03375244,0.028503418,-0.0032863617,0.05935669,0.031280518,-0.006210327,-0.013412476,0.008308411,-0.027648926,0.026931763,-0.009140015,0.01737976,-0.0357666,0.032989502,0.07928467,0.0053367615,-0.032073975,-0.009185791,-0.057281494,-0.04425049,-0.035003662,0.022323608,0.012161255,-0.009498596,0.03894043,-0.030960083,-0.035461426,-0.0010738373,0.016723633,0.010093689,0.06500244,0.019638062,-0.011230469,0.029281616,0.017288208,-0.04714966,0.046142578,0.038848877,0.007949829,-0.027008057,-0.039489746,0.030929565,0.04840088,-0.029922485,0.01424408,-0.0079956055,0.015731812,-0.01626587,-0.0001603365,0.02255249,-0.013015747,-0.024154663,-0.01727295,-0.018371582,0.03314209,0.011955261,-0.02633667,-0.032287598,-0.09320068,0.03677368,0.03491211,0.04348755,0.00029492378,0.0052986145,-0.01890564,-0.016403198,-0.07531738,0.052825928,0.074157715,-0.009140015,-0.007411957,0.033325195,-0.009536743,-0.034210205,0.009277344,-0.013320923,-0.028747559,-0.020858765,0.01852417,-0.047576904,-0.0068740845,0.02607727,0.023406982,0.049072266,-0.011123657,-0.049102783,-0.0259552,-0.008026123,0.0006170273,-0.026794434,0.0029945374,-0.004776001,0.019454956,0.021255493,0.0046539307,0.011116028,-0.0016374588,0.00920105,-0.00762558,0.003206253,-0.00983429,-0.033172607,0.01914978,0.006565094,-0.05935669,0.0068626404,-0.0039901733,0.080566406,-0.047058105,0.037872314,-0.013320923,0.023345947,0.045562744,-0.009712219,-0.04360962,0.010383606,0.029922485,0.014930725,0.041381836,0.016983032,-0.019607544,-0.01625061,0.06463623,-0.00818634,-0.0033512115,0.005317688,0.011886597,0.042663574,-0.017608643,-0.056152344,-0.039489746,-0.006919861,-0.03842163,0.029647827,-0.015129089,0.025024414,-0.017318726,0.00096416473,-0.02482605,-0.006565094,-0.03353882,0.014465332,-0.012565613,0.01109314,-0.01864624,-0.02722168,0.016296387,0.012817383,-0.0115737915,0.0024871826,0.0435791,0.015144348,-0.0158844,-0.0368042,-0.03564453,-0.0050201416,-0.0015172958,0.013839722,0.019943237,0.017654419,0.051757812,-0.03656006,-0.0041236877,0.01398468,0.019134521,0.0335083,-0.009613037,-0.0042648315,-0.06414795,-0.046020508,-0.024536133,-0.04675293,0.026046753,0.020507812,-0.00819397,0.05493164,0.0035495758,-0.020553589,-0.024276733,0.020568848,-0.042388916,0.0019607544,0.042785645,-0.009635925,-0.033111572,0.011764526,-0.00248909,0.004043579,0.037506104,0.010765076,0.031173706,0.06542969,0.040008545,0.008415222,0.021621704,0.003189087,0.028564453,0.0051612854,-0.022445679,-0.036132812,-0.017944336,0.022598267,-0.024002075,-0.017822266,-0.06665039,0.049743652,0.03744507,0.08959961,0.01876831,0.009376526,0.028030396,-0.010726929,0.012741089,-0.018005371,-0.025985718,-0.03125,-0.03427124,0.028778076,-0.015159607,-0.0031032562,-0.015975952,0.03427124,-0.0024471283,0.015213013,-0.026657104,0.045043945,-0.0158844,-0.008476257,0.017745972,0.013137817,0.05456543,0.068115234,-0.05166626,0.027038574,0.01991272,-0.041015625,0.0028629303,0.041931152,-0.013641357,-0.011398315,-0.050445557,-0.020141602,-0.0063323975,-0.0090408325,-0.044281006,0.006252289,0.0014314651,0.023483276,0.028823853,-0.007408142,-0.014656067,-0.0054855347,-0.018707275,-0.05267334,-0.004398346,-0.03564453,0.0036010742,0.04562378,-0.023849487,-0.000017881393,-0.009559631,0.0044059753,-0.0013656616,0.0026245117,0.028076172,-0.008735657,-0.048553467,0.039855957,0.0058631897,0.013046265,0.009986877,0.029251099,0.028930664,0.02935791,0.043426514,0.008651733,-0.023452759,-0.06793213,0.0076446533,-0.044677734,0.007850647,0.019744873,-0.03515625,-0.0028152466,-0.011894226,-0.036987305,-0.030181885,0.0055389404,-0.028884888,0.011047363,0.016921997,-0.021774292,-0.028961182,-0.0619812,-0.013824463,-0.0028133392,0.057495117,0.019744873,0.018692017,-0.06463623,-0.005558014,0.021347046,0.010818481,0.032196045,-0.015144348,-0.008010864,-0.019592285,-0.03668213,-0.006450653,-0.025177002,0.025848389,-0.0065307617,0.001657486,0.016860962,0.0012359619,0.021514893,0.014190674,-0.0018453598,0.024780273,-0.025619507,-0.012176514,-0.00504303,0.03744507,0.02079773,-0.014297485,-0.043273926,0.04095459,0.015197754,0.03845215,-0.04647827,-0.0064735413,-0.0049858093,0.0074806213,0.014503479,-0.011672974,-0.0045661926,-0.014228821,-0.047851562,-0.07147217,0.03225708,-0.02130127,0.023147583,0.02079773,0.0031261444,0.027145386,-0.010391235,-0.003414154,0.01739502,-0.023651123,-0.007499695,-0.019241333,-0.03237915,-0.015640259,-0.01713562,-0.021560669,0.025680542,-0.021209717,0.010147095,0.0017786026,-0.019424438,0.031433105,0.0045394897,-0.002073288,0.019134521,0.0017814636,0.021759033,0.03552246,0.012878418,-0.044311523,0.021865845,-0.0011291504,0.008842468,-0.015556335,0.047821045,0.023208618,-0.011260986,-0.015289307,-0.012107849,-0.021331787,-0.019134521,0.00504303,0.006793976,0.0030212402,-0.0024032593,-0.036132812,0.022979736,-0.0012044907,-0.029815674,-0.033691406,0.015808105,0.0052452087,-0.038238525,0.02456665,0.031097412,0.051361084,-0.015960693,0.010375977,0.0071258545,0.041229248,0.043029785,0.010810852,-0.008674622,0.022003174,-0.013084412,0.010177612,-0.0053253174,-0.016937256,0.015655518,-0.000667572,0.027496338,0.02659607,0.008682251,-0.026168823,-0.031311035,0.0014705658,-0.014907837,-0.0262146,0.026123047,0.019989014,0.028564453,-0.024093628,0.01940918,0.008224487,-0.016799927,-0.02015686,-0.0044670105,0.036987305,-0.017349243,-0.009902954,0.014350891,0.006275177,0.022979736,-0.06359863,-0.010261536,0.005016327,0.010101318,-0.013046265,-0.04156494,-0.039978027,0.008293152,0.041168213,0.011795044,0.025039673,0.030136108,0.0027675629,0.010612488,0.025558472,-0.011680603,-0.013504028,-0.004096985,-0.05203247,-0.018112183,-0.0048332214,0.0050964355,-0.031341553,0.011955261,-0.008575439,-0.028747559,0.002527237,-0.015129089,-0.00028014183,-0.023284912,0.014160156,0.033233643,0.013442993,0.01977539,-0.01373291,-0.029327393,0.0032176971,0.0104904175,0.014175415,-0.05078125,0.023452759,-0.015129089,-0.005657196,-0.0013446808,0.017654419,0.02456665,0.02619934,0.01763916,0.044799805,-0.044281006,0.052612305,-0.023010254,0.020309448,0.0033855438,-0.036987305,-0.013069153,-0.021621704,-0.010665894,0.04559326,-0.028778076,-0.012458801,-0.030578613,-0.036224365,-0.016464233,-0.055511475,0.01751709,0.03881836,0.040008545,-0.024795532,0.0022411346,-0.0032348633,0.014602661,-0.013999939,0.0032367706,-0.017440796,0.024734497,0.020950317,-0.0049438477,-0.03353882,-0.027557373,-0.014175415,-0.006629944,-0.049926758,-0.05935669,-0.009429932,0.0068359375,-0.01133728,-0.014785767,-0.024658203,-0.033081055,-0.0047073364,-0.039276123,0.011955261,-0.00039553642,0.021835327,0.0041503906,-0.027633667,-0.0020179749,0.01373291,-0.013084412,0.033721924,0.00491333,-0.0017585754,-0.042297363,0.014411926,0.016204834,0.020889282,-0.00831604,-0.017929077,-0.00920105,-0.017501831,-0.05807495,-0.009391785,-0.001917839,-0.014923096,-0.009895325,-0.002149582,-0.05142212,-0.0051002502,-0.023727417,-0.0068740845,0.023010254,0.009483337,0.015930176,-0.0078048706,0.017974854,-0.0035495758,-0.011123657,-0.02986145,0.018798828,0.011276245,0.008918762,0.026306152,0.05050659,-0.0027885437,-0.022857666,0.0030059814,0.006175995,0.016693115,-0.018859863,0.015426636,-0.017654419,0.017608643,-0.0055351257,-0.006690979,-0.0390625,-0.00869751,0.07537842,0.0010004044,-0.014213562,-0.012077332,-0.013160706,0.014930725,0.033599854,-0.03213501,-0.0016727448,-0.01953125,0.022583008,-0.021820068,0.008644104,-0.0025100708,0.02633667,-0.02394104,-0.051849365,-0.015571594,-0.0107421875,-0.018310547,-0.07397461,-0.027648926,-0.072753906,0.00831604,-0.0099487305,-0.030563354,0.0022201538,0.008781433,-0.017242432,-0.080200195,-0.0009756088,0.052459717,0.0034065247,0.030181885,-0.013435364,0.025375366,0.036254883,-0.03274536,-0.007827759,0.025817871,-0.032592773,-0.015960693,-0.026672363,0.018737793,-0.012557983,-0.017242432,-0.0035972595,0.016296387,0.019424438,-0.0040283203,0.014801025,-0.013694763,0.018493652,-0.017593384,0.017623901,-0.015014648,-0.00856781,0.040924072,-0.046569824,0.030319214,0.007827759,-0.008735657,0.008102417,0.035949707,0.04434204,-0.035095215,-0.014404297,0.016204834,0.0143585205,0.038116455,-0.020339966,0.053985596,0.012664795,-0.014015198,0.013473511,-0.00957489,-0.007347107,-0.024551392,-0.026885986,0.018981934,0.0025348663,0.012428284,-0.02456665,-0.005332947,0.018997192,-0.005001068,0.01071167,-0.011749268,-0.018875122,-0.030181885,0.0085372925,0.0035877228,0.0077323914,0.0050582886,0.033081055,0.023071289,0.034423828,0.014625549,-0.015975952,0.015357971,0.030212402,-0.013038635,0.002653122,0.02532959,0.012451172,0.017044067,0.020202637,0.011062622,-0.045410156,-0.014816284,-0.028182983,-0.026565552,-0.0042266846,-0.01033783,-0.01071167,-0.012321472,0.0011634827,-0.009407043,-0.035705566,-0.001162529,-0.025100708,-0.026153564,-0.004547119,-0.012275696,0.023254395,0.0027065277,0.013801575,0.0026512146,-0.0017433167,0.041931152,-0.01424408,-0.017532349,0.032714844,0.027862549,0.026870728,-0.030822754,-0.005092621,-0.01424408,-0.00762558,0.0067329407,-0.030044556,0.006324768,0.044128418,-0.016601562,-0.0004911423,0.0030441284,0.02619934,-0.012939453,0.0061683655,-0.01133728,0.015449524,-0.008842468,0.030899048,-0.053619385,0.02722168,0.009559631,0.0020008087,-0.0064048767,-0.013618469,-0.028076172,0.01828003,-0.0015268326,-0.008377075,0.055145264,0.010528564,0.02746582,-0.019500732,-0.026382446,0.006164551,-0.026321411,-0.020248413,0.022598267,-0.0044937134,0.0013408661,0.017837524,-0.036987305,0.03289795,-0.037200928,0.018371582,0.00066661835,0.009063721,-0.009674072,-0.01852417,-0.0048561096,-0.010154724,-0.017150879,-0.0059013367,-0.0032138824,0.047576904,0.023910522,0.029006958,0.048431396,0.014892578,0.007865906,-0.043762207,-0.029541016,0.006549835,-0.011871338,0.018600464,-0.018600464,0.036956787,0.041015625,0.005710602,0.0473938,0.032440186,0.0317688,0.0008716583,0.007972717,-0.020584106,0.01625061,-0.0137786865,0.0289917,-0.0033855438,0.035705566,-0.028381348,0.023986816,0.022201538,0.020553589,-0.02166748,0.03970337,0.07397461,0.01625061,-0.00856781,0.034973145,-0.0062217712,-0.010986328,-0.00995636,-0.023010254,0.053222656,0.0032978058,0.04788208,0.052764893,0.006526947,-0.0036640167,0.025054932,-0.02835083,-0.018432617,0.059783936,0.027786255,-0.029067993,-0.011268616,-0.0077590942,0.0076446533,-0.045776367,-0.02432251,0.0236969,-0.00806427,0.0066452026,-0.0015306473,-0.005126953,-0.017028809,0.011421204,0.014877319,0.012763977,-0.017944336,0.019332886,0.033843994,0.0005054474,0.019165039,-0.005378723,0.022659302,-0.023834229,-0.022994995,0.027008057,0.025726318,-0.006122589,-0.009811401,0.025054932,0.0066452026,0.039154053,0.04220581,-0.027862549,0.0043525696,0.030258179,0.012298584,-0.004234314,0.051727295,0.033935547,0.011077881,0.03692627,0.034820557,0.03894043,-0.039154053,0.028701782,-0.00013065338,0.0015306473,-0.014892578,-0.004283905,-0.0041007996,-0.013244629,0.018997192,-0.0010585785,-0.013282776,0.024261475,0.022140503,-0.0049705505,-0.012504578,-0.010879517,0.017730713,-0.029418945,0.00012862682,0.016647339,-0.013046265,0.032989502,0.008743286,0.025131226,-0.022476196,0.024337769,-0.0010814667,-0.015090942,-0.000041246414,0.031677246,-0.035125732,0.0010576248,-0.008216858,0.00025224686,-0.056549072,0.008331299,0.020599365,-0.010902405,0.022613525,0.010932922,-0.004383087,-0.0072517395,0.02911377,0.010055542,0.0006098747,-0.014839172,-0.022506714,0.031555176,0.043792725,-0.0042648315,0.004058838,-0.02571106,-0.0013780594,0.0026721954,-0.0075531006,-0.007007599,-0.015037537,-0.0154953,-0.014404297,0.024932861,0.03262329,0.020324707,0.057006836,-0.014770508,-0.01651001,0.0055732727,0.032592773,0.002752304,0.006340027,0.010116577,0.010040283,-0.018798828,0.04458618,0.041412354,0.012008667,0.032287598,-0.00036263466,-0.014625549,0.012496948,-0.012817383,0.02935791,-0.011398315,0.0069885254,-0.0036010742,0.03201294,-0.02003479,-0.03137207,0.010147095,-0.024429321,-0.025253296,-0.020431519,0.010574341,-0.0029201508,0.02619934,0.041137695,0.026031494,-0.0231781,0.062927246,-0.009765625,0.042816162,0.005256653,-0.013877869,0.04638672,0.026504517,0.03994751,0.013694763,0.013679504,-0.03933716,0.02178955,0.032989502,0.02368164,0.016860962,0.005947113,-0.010566711,0.03466797,-0.010864258,0.036010742,-0.007472992,0.002691269,0.022338867,-0.0040359497,-0.007896423,-0.008033752,-0.0026988983,0.009628296,0.046142578,-0.025924683,-0.009262085,-0.026931763,-0.012702942,0.026031494,-0.012542725,0.0026435852,-0.0046157837,-0.01876831,0.015388489,-0.02986145,-0.023895264,0.011192322,0.024520874,-0.051116943,-0.015289307,0.0047836304,0.022888184,-0.02180481,0.025314331,0.02281189,-0.006679535,0.00932312,0.044281006,-0.007247925,0.027893066,-0.0099487305,0.033050537,0.031799316,0.010177612,-0.024856567,-0.00907135,0.010444641,-0.007881165,0.013252258,0.038970947,-0.026794434,0.007888794,-0.010154724,-0.008834839,-0.0079422,0.0008716583,-0.0025901794,0.009727478,0.0015220642,-0.0068740845,0.00046253204,0.0027999878,-0.0034179688,0.007949829,0.009773254,-0.014907837,0.0141067505,0.035583496,0.0158844,-0.037017822,-0.00944519,0.009803772,0.00466156,-0.018341064,-0.007911682,-0.0138549805,-0.03201294,0.010810852,0.014015198,0.017791748,0.014350891,-0.024398804,-0.0015211105,0.018371582,0.0047836304,0.015991211,0.006111145,-0.0027809143,0.018829346,-0.009376526,-0.0063438416,-0.008041382,-0.005844116,0.010848999,0.01802063,-0.0034637451,-0.03024292,0.024002075,-0.005455017,0.012878418,0.00440979,-0.01184845,0.013961792,-0.01550293,0.00035429,-0.002752304,0.010025024,-0.01058197,-0.021697998,-0.0115737915,0.03756714,0.054718018,-0.012237549,-0.011619568,0.024032593,0.018692017,0.023239136,0.040039062,0.0030078888,0.039733887,0.032043457,-0.02078247,-0.01675415,0.023757935,-0.012756348,-0.02619934,0.013465881,-0.0035800934,-0.011787415,0.01878357,0.013824463,0.0050811768,-0.03125,-0.0070877075,-0.0154800415,-0.017211914,0.0119018555,-0.010543823,0.017562866,-0.023284912,-0.01071167,0.011451721,-0.032287598,-0.051818848,-0.019470215,-0.0038089752,-0.01109314,-0.055847168,0.003665924,-0.03149414,0.0063056946,-0.029922485,0.004333496,-0.008010864,0.013618469,-0.011413574,-0.0049438477,0.0017518997,0.020858765,0.018875122,0.008644104,0.014930725,-0.023529053,-0.016204834,-0.029541016,0.007785797,-0.014350891,0.021270752,0.0042762756,0.032806396,0.019058228,-0.010879517,-0.0041275024,-0.0040283203,-0.0019302368,-0.010665894,-0.021438599,-0.019454956,0.022918701,0.014518738,-0.0127334595,-0.010215759,0.045318604,-0.032562256,-0.012184143,0.031585693,0.041290283,0.007434845,0.0335083,-0.019256592,0.0011291504,-0.014892578,-0.0034637451,-0.01360321,0.010139465,0.0075263977,0.015174866,-0.0009994507,0.0090408325,0.019744873,-0.013053894,-0.0048942566,0.030151367,0.009513855,-0.0077781677,0.035583496,0.013053894,0.0010051727,-0.01499939,-0.003982544,0.027313232,0.049865723,0.010749817,0.009902954,-0.012359619,0.0017032623,-0.015197754,0.013504028,0.013305664,-0.02470398,-0.048461914,-0.014976501,-0.031433105,0.02519226,-0.0016050339,0.0073280334,-0.011947632,0.015068054,-0.018173218,-0.02796936,-0.021194458,0.032104492,0.01335907,-0.017974854,-0.005115509,0.008880615,0.018692017,-0.035858154,-0.0019550323,-0.04425049,-0.025848389,-0.015235901,-0.01852417,0.027450562,0.006164551,-0.008644104,-0.005531311,-0.008522034,-0.0014181137,-0.0023555756,0.022491455,-0.01096344,0.002922058,0.024108887,0.020568848,-0.023803711,0.028808594,-0.010681152,0.0076522827,0.008102417,-0.005176544,0.01159668,-0.026245117,0.030792236,-0.010688782,-0.006122589,0.032196045,-0.0018434525,0.01739502,-0.035247803,-0.0035037994,-0.0023822784,-0.007461548,0.041412354,-0.01902771,-0.013557434,0.017074585,-0.018630981,-0.027740479,0.0018663406,0.0184021,0.024642944,-0.0075912476,0.048461914,-0.0065460205,-0.009239197,0.014175415,0.010498047,-0.019134521,0.00081682205,0.031463623,0.0027828217,0.0041999817,-0.005821228,-0.017028809,-0.02670288,-0.0076942444,0.018173218,-0.0043182373,-0.015174866,0.023452759,0.020645142,0.046295166,-0.0064353943,0.02456665,0.016921997,0.0093307495,0.029006958,0.0010385513,0.053466797,-0.0020046234,-0.024276733,0.0032081604,-0.0008802414,-0.024032593,0.0033245087,-0.0040245056,-0.0021419525,-0.03677368,0.015655518,0.00548172,0.02671814,-0.0137786865,0.007713318,-0.022842407,-0.017028809,-0.035095215,-0.0070343018,-0.03543091,0.0075263977,0.041870117,0.0043144226,0.034851074,-0.0026111603,-0.020187378,0.022613525,0.050811768,0.0038032532,-0.023468018,-0.014816284,0.009002686,0.004016876,0.0051231384,0.0068473816,-0.015411377,-0.015792847,0.001991272,-0.013000488,0.014297485,-0.01033783,0.021362305,0.008102417,-0.002506256,-0.011741638,0.022369385,-0.005844116,-0.0021038055,0.012214661,0.0048332214,0.033447266,0.032989502,-0.012382507,0.021820068,0.018203735,-0.041809082,0.06222534,-0.0044670105,0.033294678,-0.016952515,0.012832642,-0.036193848,-0.025222778,-0.022766113,0.006629944],"createdAt":"2026-04-18T19:25:51.363Z","updatedAt":"2026-04-22T11:32:22.920Z","lastSeenAt":"2026-04-22T11:32:22.920Z","tsv":"'/api':186 '/api/v1/transactions/298':78,224 '/docs':185 '/pricing':187 '/readme':189 '/request':13,28 '0.02':12,27,98,175 '000':93 '20':92 '402':87 '6':103 'Base network API' 'USDC API' 'access':83,118 'actual':245 'advertis':109 'ai':144 'ai-inference' 'ai/ml':49 'analysi':148 'analyt':48,138 'api':5,20,37,82,111,136 'avail':215 'base':8,23,72,94 'base-network' 'behavior':246 'behind':222 'broad':42 'call':4,19,106 'cannot':250 'categori':134 'challeng':88 'classif':151 'classification' 'confirm':252 'connect':195 'content':201 'convers':167 'crawl':218 'crypto payment API' 'crypto-data' 'data':47,52,137,141 'data-analytics' 'decim':104 'document':180,210,240 'embed':152 'embeddings' 'enabl':36 'endpoint':45,57,76,171,238,249 'estim':162 'exampl':214,242 'exchang':157 'export':142 'extrem':182 'feed':156 'financ':153 'finance-data' 'finance/web3':51 'four':133 'function':221 'gas':161 'generat':168 'generic':236 'geocod':165 'geocoding' 'header':129 'infer':50 'infrastructure/utilities':164 'inlin':122 'insight':143 'instant':117 'key':112 'label':80 'learn':146 'limit':115 'list':132,170 'lookup':233 'low fee API' 'lowpaymentfee.com':31 'machin':145 'made':121 'may':229 'metric':139 'micropayment API' 'network':9,24,73 'offer':40 'openapi':205 'page':190 'paid':59 'path':225 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'payment':119,128 'per':3,18,61,105,177 'per-request':60,176 'per-request-billing' 'platform':6,21,38,108 'premium':81,237 'price':155,179 'prompt':197 'protocol':66 'quot':160 'rate':114,158 'render':192 'report':140 'request':62,89,178 'request/response':208 'respons':243 'return':85 'schema':209 'sentiment':147 'sentiment-analysis' 'servic':55 'set':43 'settl':67 'share':172 'sinc':100 'site':131 'span':46 'spars':183 'spec':206 'specif':75,220 'summar':150 'text':149 'text-summarization' 'token':159 'transact':232 'unclear':227 'unit':95 'usag':213 'usd':99 'usdc':15,30,69,97,101 'usdc-settlement' 'use':63,102 'util':54 'utility-services' 'valid':166 'via':10,25,123 'wallet':196 'web3':154 'without':239 'x':127 'x-payment':126 'x402':11,26,35,65,125 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"498c1014-3de2-4218-a804-9b958939f2ac","listingId":"38835fdd-4c9f-4baa-8eeb-4adc968f2632","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/transactions/298","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:25:51.363Z"}],"sources":[{"listingId":"38835fdd-4c9f-4baa-8eeb-4adc968f2632","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/298","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:51.363Z","lastSeenAt":"2026-04-22T11:32:22.920Z"}],"details":{"listingId":"38835fdd-4c9f-4baa-8eeb-4adc968f2632","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/298 \\\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 a 402 challenge requesting up to 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/298"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents that need on-demand AI inference (sentiment, summarization, classification) without API key management","Fetching real-time crypto gas estimates or token quotes with per-call payment","Running data analytics or export jobs paid per request in USDC","Geocoding or data validation as a utility microservice"],"bestFor":["AI agents with Base-network USDC wallets needing frictionless API access","Developers who want pay-as-you-go pricing without subscriptions or API keys","Low-volume or bursty workloads where per-request billing is cost-effective"],"notFor":["Users without a Base-network USDC wallet or x402-compatible client","High-volume production workloads needing SLAs, rate-limit guarantees, or detailed documentation","Use cases requiring well-documented request/response schemas before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.615Z"},"updatedAt":"2026-04-22T11:32:22.920Z"}}