{"id":"6efc8af8-6988-4898-9ca9-1438c387d2ab","shortId":"NBWMjG","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 platform that exposes a broad catalog of endpoints across four categories: Data & Analytics (metrics, reports, 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 at `/api/v1/messages/75` is described as \"Premium API Access\" and accepts POST requests. Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via an `X-PAYMENT` header, with a 300-second timeout window. The output schema indicates a standard HTTP POST interface.\n\nDocumentation beyond the landing page is sparse — the /api, /pricing, and /README routes all resolve to a wallet-connect prompt with no additional content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The exact functionality behind the `/api/v1/messages/75` path is unclear; it does not map to any of the named endpoints listed on the homepage. Agents should treat this as a live but under-documented endpoint.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","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":["The endpoint path /api/v1/messages/75 does not correspond to any named endpoint on the homepage catalog — its actual functionality is unknown.","No OpenAPI spec, request schema, or response schema is available.","Documentation pages (/api, /pricing, /README) return only a wallet-connect prompt with no useful content.","No examples of request or response payloads could be found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/messages/75","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/75","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no usage examples, and the specific /api/v1/messages/75 path is not documented on the homepage. The /api, /pricing, and /README pages are empty beyond a wallet-connect prompt. 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":"2026-04-21T23:16:52.296Z","embedding":[-0.027786255,-0.021514893,0.046081543,0.0146102905,-0.0008587837,-0.014663696,-0.03540039,0.030761719,0.07324219,-0.06707764,0.018676758,-0.0446167,-0.040252686,-0.032287598,-0.011306763,0.016143799,-0.0024814606,0.0003798008,-0.032196045,0.035217285,0.036712646,-0.016326904,-0.028320312,0.039642334,-0.004219055,-0.027404785,0.004058838,0.00006335974,-0.016784668,-0.04437256,0.049194336,-0.029251099,-0.0023670197,-0.007843018,-0.014053345,0.008171082,-0.012588501,0.029403687,0.03161621,-0.015625,-0.011138916,-0.046417236,0.013847351,-0.01524353,-0.056854248,-0.0021457672,0.016525269,-0.0029087067,0.008285522,0.0109939575,-0.04360962,-0.0063476562,-0.0015592575,0.021011353,-0.0044288635,-0.004131317,-0.005847931,-0.0067214966,0.020858765,0.008323669,-0.007167816,-0.045166016,-0.026184082,-0.018325806,-0.010063171,0.05670166,-0.014091492,0.043426514,-0.004119873,0.057891846,0.05621338,0.040496826,0.020263672,-0.00027751923,-0.0034427643,-0.01776123,-0.013145447,0.071899414,-0.02305603,-0.038391113,-0.009346008,-0.016052246,-0.05935669,-0.0074653625,-0.02330017,-0.049560547,-0.019805908,0.020965576,-0.033721924,0.034362793,-0.071899414,-0.011566162,-0.02116394,-0.009757996,0.006526947,-0.021774292,-0.012039185,0.012611389,-0.010429382,0.013877869,0.0026340485,-0.05908203,-0.004951477,0.020858765,0.035064697,0.03656006,0.020248413,0.02746582,-0.002368927,-0.008911133,-0.06604004,0.024780273,-0.017822266,-0.0090789795,0.008728027,0.008552551,-0.009300232,0.019165039,-0.024246216,0.008460999,-0.052246094,0.042999268,0.008781433,0.006954193,-0.0009841919,-0.06921387,-0.016235352,0.00466156,-0.024856567,-0.0113220215,0.011451721,0.008262634,0.025543213,-0.01966858,-0.036865234,0.009521484,-0.01676941,-0.028320312,-0.048431396,-0.025054932,0.035858154,-0.025726318,0.008682251,0.029296875,-0.093933105,-0.018493652,-0.04937744,-0.007965088,-0.029846191,-0.018981934,0.008804321,0.026794434,-0.030822754,-0.020568848,-0.016937256,-0.018569946,-0.0019111633,0.016464233,-0.016967773,0.034057617,-0.017959595,0.015930176,0.011306763,-0.0022792816,0.0140686035,0.02609253,0.012466431,-0.09625244,-0.08026123,-0.02507019,-0.011688232,-0.034240723,-0.017929077,0.00029349327,-0.0066566467,-0.058044434,-0.018203735,-0.02658081,-0.014152527,-0.036712646,0.008506775,-0.023529053,0.0072517395,-0.011734009,-0.0541687,-0.025344849,-0.018692017,0.07312012,0.025161743,0.030899048,0.012992859,-0.019256592,0.07458496,0.026489258,-0.012046814,-0.016555786,0.02229309,-0.028381348,0.019119263,-0.008895874,0.010749817,-0.03552246,0.05859375,0.06213379,-0.005844116,-0.024124146,-0.0044898987,-0.03704834,-0.049224854,-0.03765869,0.027435303,0.0014448166,0.0015220642,0.032989502,-0.03817749,-0.043518066,-0.028076172,0.014511108,-0.0050315857,0.056610107,0.013183594,-0.0032367706,0.022750854,0.002046585,-0.044311523,0.040527344,0.036956787,0.012451172,-0.026809692,-0.024505615,0.050933838,0.0146484375,-0.01802063,0.005870819,-0.0057258606,0.042907715,0.00078201294,0.01777649,0.016647339,0.00039219856,-0.016784668,-0.028167725,-0.011940002,0.018737793,-0.0055389404,-0.01651001,-0.035308838,-0.08129883,0.04559326,0.029220581,0.057617188,-0.02166748,0.009094238,-0.025131226,-0.0026435852,-0.06451416,0.045959473,0.058380127,0.0036125183,-0.016616821,0.020874023,0.0033226013,-0.02456665,0.007698059,-0.0030784607,-0.034240723,-0.004360199,0.012687683,-0.054626465,-0.01637268,0.024398804,0.004787445,0.06573486,0.0013608932,-0.05697632,-0.01360321,-0.00756073,-0.0036792755,-0.017623901,0.0050201416,-0.010406494,0.009994507,0.025314331,-0.009407043,0.012580872,0.0034217834,0.027313232,-0.01309967,0.0015630722,-0.023101807,-0.035125732,0.00856781,-0.00016498566,-0.06097412,0.012481689,0.00060749054,0.07635498,-0.037506104,0.017654419,-0.014328003,0.013656616,0.03930664,0.006954193,-0.052734375,0.018569946,0.03564453,0.01725769,0.04574585,0.01701355,-0.052612305,0.0036735535,0.073791504,-0.00699234,-0.0038986206,0.00073719025,0.006198883,0.028701782,-0.014663696,-0.047607422,-0.0423584,-0.004131317,-0.032806396,0.033721924,-0.022979736,-0.0062065125,-0.014770508,0.016937256,-0.019973755,0.0061416626,-0.03286743,0.027252197,-0.018569946,0.018936157,0.009918213,-0.022781372,0.010314941,0.0020103455,-0.010665894,0.013092041,0.038330078,0.016799927,-0.01235199,-0.034484863,-0.024520874,-0.017944336,-0.026519775,0.012145996,0.02935791,0.017990112,0.055877686,-0.03302002,0.0046081543,0.04348755,0.010070801,0.036956787,-0.014450073,-0.0059013367,-0.045440674,-0.0463562,-0.02532959,-0.03579712,0.014457703,0.015808105,0.00057172775,0.059906006,0.015151978,-0.035064697,-0.04525757,0.02998352,-0.04260254,0.0005569458,0.020248413,-0.018692017,-0.038635254,-0.008491516,-0.0074272156,-0.00374794,0.028808594,0.010253906,0.025482178,0.060760498,0.026138306,-0.009101868,0.0140686035,-0.0010385513,0.036010742,0.010658264,-0.020614624,-0.022979736,0.00082445145,0.040985107,-0.015327454,-0.035461426,-0.06222534,0.056915283,0.040130615,0.060394287,-0.0028686523,0.011024475,0.0446167,-0.003818512,-0.0069999695,-0.031036377,-0.0065689087,-0.036254883,-0.0340271,0.024871826,-0.014854431,-0.009979248,-0.025894165,0.03930664,-0.015960693,0.018676758,-0.016479492,0.033294678,-0.014137268,0.01499176,-0.0003144741,-0.0020809174,0.048187256,0.07232666,-0.05947876,0.021362305,0.024230957,-0.038085938,0.0070343018,0.053009033,-0.030136108,-0.007751465,-0.04916382,-0.030136108,-0.011772156,-0.011306763,-0.050109863,0.01550293,-0.0016107559,0.02406311,0.039215088,-0.018844604,-0.008468628,-0.009208679,-0.008338928,-0.071777344,-0.0075416565,-0.03579712,0.0036315918,0.047607422,-0.012435913,-0.010818481,-0.012954712,-0.020584106,-0.019119263,0.0008845329,0.032318115,-0.011642456,-0.049682617,0.04852295,0.01928711,0.020935059,0.018051147,0.03717041,0.023452759,0.022613525,0.052764893,-0.004673004,-0.028701782,-0.054779053,0.010009766,-0.05090332,0.031143188,0.020645142,-0.017852783,0.0071907043,-0.0140686035,-0.030349731,-0.036071777,0.006023407,-0.017959595,0.013557434,0.01928711,-0.035888672,-0.033966064,-0.051940918,-0.030059814,-0.01272583,0.07336426,0.020202637,-0.022720337,-0.04159546,0.00157547,0.017852783,-0.0027561188,0.03488159,-0.015594482,-0.021057129,-0.022033691,-0.046203613,0.0079574585,-0.01499939,0.012313843,-0.0064811707,-0.020553589,0.016738892,-0.002073288,0.03225708,0.002412796,-0.0059051514,0.018508911,-0.035064697,0.0000037550926,-0.007637024,0.034698486,0.011161804,-0.008560181,-0.02960205,0.030578613,0.017364502,0.042877197,-0.024353027,-0.0016765594,0.01701355,0.017593384,0.036895752,-0.01965332,-0.0096588135,-0.0143966675,-0.064453125,-0.05419922,0.03225708,-0.020736694,0.029647827,0.0317688,0.021850586,0.019454956,-0.013893127,0.008377075,-0.00374794,-0.038757324,-0.012054443,-0.032592773,-0.02772522,-0.02583313,-0.0007929802,-0.017868042,0.017562866,-0.013542175,0.0021800995,0.019714355,-0.024642944,0.017730713,0.016220093,-0.0068359375,0.032806396,-0.0009918213,0.03164673,0.037628174,-0.0004029274,-0.044281006,0.030975342,0.0070610046,0.012283325,-0.0061035156,0.04360962,0.041625977,-0.013725281,-0.01361084,-0.0010614395,-0.0085372925,-0.03186035,0.004234314,0.010345459,0.017562866,-0.01576233,-0.0340271,0.013916016,0.0038795471,-0.028030396,-0.025802612,0.01889038,0.013916016,-0.025665283,0.022705078,0.027832031,0.0418396,-0.0287323,0.0042686462,0.0029067993,0.04067993,0.052368164,0.011505127,-0.004760742,0.010345459,-0.002216339,0.0070610046,-0.016235352,-0.003753662,0.016616821,-0.012413025,0.02029419,0.023101807,0.019363403,-0.037139893,-0.037628174,0.016662598,-0.009315491,-0.02470398,0.0057525635,0.008583069,0.01965332,-0.02583313,0.02015686,0.010894775,-0.011444092,-0.022064209,-0.012207031,0.028564453,-0.020019531,-0.02243042,0.037628174,0.010673523,0.022323608,-0.038330078,-0.005748749,0.00737381,0.009048462,-0.021697998,-0.051879883,-0.04650879,0.00724411,0.019210815,0.023635864,0.024414062,0.026489258,-0.010154724,0.0071411133,0.016159058,0.007041931,-0.01663208,-0.018692017,-0.04067993,-0.02796936,0.0015230179,0.01335907,-0.040283203,0.022338867,-0.010246277,-0.029388428,-0.00015294552,-0.009269714,-0.005756378,-0.018478394,0.011734009,0.0440979,0.0062942505,0.022949219,-0.019546509,-0.034118652,-0.009780884,0.00982666,0.024215698,-0.05947876,0.023345947,-0.007621765,0.008369446,0.0050315857,0.014976501,0.0113220215,0.03086853,0.012191772,0.029434204,-0.030838013,0.04724121,-0.027648926,0.02760315,0.004272461,-0.041809082,-0.012130737,-0.039154053,-0.008270264,0.039978027,-0.033203125,-0.019973755,-0.031585693,-0.033081055,-0.007736206,-0.05227661,0.01398468,0.03201294,0.05105591,-0.028320312,0.008743286,0.0026988983,-0.0005283356,-0.012794495,0.015449524,-0.0024547577,0.017440796,0.027755737,0.010917664,-0.016616821,-0.025436401,-0.029190063,-0.0015077591,-0.050598145,-0.05593872,-0.013725281,-0.004333496,-0.013671875,-0.0005660057,-0.020202637,-0.041107178,-0.0010719299,-0.044281006,0.020111084,-0.001745224,0.020339966,0.0045547485,-0.026428223,-0.002035141,0.020462036,-0.013969421,0.034057617,-0.0070266724,-0.010826111,-0.033966064,0.0029964447,0.01499176,0.020095825,-0.0048103333,-0.0051841736,-0.0067710876,-0.01977539,-0.044799805,-0.0042686462,-0.0033016205,-0.015686035,-0.010765076,0.0030403137,-0.049835205,0.0020980835,-0.021469116,-0.0069007874,0.04248047,-0.004802704,0.00086927414,-0.019973755,0.008102417,-0.01096344,-0.011260986,-0.029678345,0.015174866,0.0118637085,0.010101318,0.023468018,0.039794922,0.0011253357,-0.016403198,0.015609741,0.008117676,0.018920898,-0.014030457,0.016448975,-0.028076172,0.011962891,-0.017837524,-0.0059890747,-0.028030396,0.00008571148,0.07714844,-0.003370285,-0.008323669,-0.0099105835,-0.0073165894,0.013427734,0.031707764,-0.045898438,0.0074882507,-0.02949524,0.020889282,-0.029891968,0.021850586,0.0087890625,0.013725281,-0.020233154,-0.04852295,-0.004447937,-0.0021018982,-0.010543823,-0.065979004,-0.024032593,-0.05718994,0.009559631,-0.0031929016,-0.031188965,-0.0034542084,0.015342712,-0.012199402,-0.08081055,0.006603241,0.0491333,0.0020198822,0.022720337,-0.0017328262,0.0074653625,0.018585205,-0.025543213,0.001745224,0.033477783,-0.02897644,-0.018478394,-0.01852417,0.025512695,-0.003162384,-0.020019531,0.0031318665,0.006248474,0.027130127,-0.0044021606,0.009902954,-0.026504517,0.028213501,-0.021697998,0.015205383,-0.008300781,-0.007835388,0.04940796,-0.056274414,0.024887085,0.01322937,-0.011444092,-0.0035572052,0.024215698,0.046203613,-0.03881836,-0.011390686,0.00051641464,0.0013160706,0.038085938,-0.016220093,0.03427124,0.012886047,-0.021194458,0.013130188,0.0029067993,-0.010948181,-0.04034424,-0.034057617,0.03062439,-0.0046424866,0.002796173,-0.012809753,0.004676819,0.02003479,-0.011581421,0.0048179626,-0.009132385,-0.031036377,-0.02670288,-0.005203247,0.00920105,0.0072288513,-0.00043797493,0.021606445,0.004173279,0.03213501,0.00028419495,-0.009101868,-0.007843018,0.04248047,0.0011615753,-0.0011177063,0.028656006,0.003622055,0.02142334,0.022140503,0.008857727,-0.039794922,-0.0026397705,-0.027496338,-0.020080566,0.015357971,-0.0121154785,-0.0023956299,0.0008740425,0.0060043335,-0.0119018555,-0.028030396,0.006839752,-0.025497437,-0.028137207,-0.0066337585,-0.001080513,0.023910522,0.0038852692,0.011497498,0.015045166,-0.014053345,0.053894043,-0.008644104,-0.023590088,0.013824463,0.024353027,0.016204834,-0.03543091,-0.0071640015,0.0014972687,-0.007980347,0.0063934326,-0.032592773,0.017303467,0.043792725,-0.012298584,0.010307312,0.021011353,0.030654907,-0.020492554,-0.002407074,-0.0017318726,0.016021729,-0.008811951,0.026992798,-0.05026245,0.026931763,0.0010919571,0.010063171,-0.01234436,-0.021865845,-0.0335083,0.025634766,-0.0026931763,-0.0048828125,0.03125,-0.000538826,0.022155762,-0.020904541,-0.012130737,-0.0003964901,-0.028411865,-0.021697998,0.017547607,-0.00111866,0.006336212,0.007587433,-0.024108887,0.031951904,-0.035064697,0.005329132,0.008277893,-0.004306793,-0.006023407,-0.015151978,-0.009475708,0.013259888,-0.02746582,-0.013839722,-0.0047416687,0.05291748,0.016937256,0.04348755,0.026748657,0.0028057098,-0.00008302927,-0.046691895,-0.03552246,-0.008972168,-0.023254395,0.030197144,-0.021835327,0.04434204,0.03866577,-0.008834839,0.03765869,0.033843994,0.02897644,0.0007214546,0.015930176,-0.016601562,0.008811951,-0.019500732,0.017196655,0.0052719116,0.034484863,-0.030715942,0.025146484,0.029815674,0.017745972,-0.01928711,0.025894165,0.056488037,0.016647339,0.014297485,0.030029297,0.0030612946,-0.015899658,0.014228821,-0.035949707,0.047210693,0.002155304,0.059906006,0.039245605,-0.0009613037,0.005870819,0.030090332,-0.025634766,-0.024780273,0.054626465,0.024734497,-0.018447876,-0.012275696,-0.011726379,0.0022010803,-0.028213501,-0.034973145,0.01902771,-0.010055542,0.022537231,-0.029815674,-0.0098724365,-0.0057029724,0.0028629303,0.02330017,0.019195557,-0.007587433,0.010826111,0.021408081,-0.00008380413,0.036254883,-0.0003402233,0.029678345,-0.026367188,-0.025878906,0.027267456,0.009437561,-0.010307312,0.0044555664,0.027816772,0.0077056885,0.045562744,0.041015625,-0.026901245,-0.004180908,0.034729004,0.010940552,0.0035266876,0.053771973,0.034454346,0.004962921,0.03604126,0.04611206,0.034820557,-0.028213501,0.01852417,0.004310608,0.0059318542,0.00036907196,-0.014541626,0.0131073,-0.003604889,0.005722046,-0.0028972626,-0.020980835,0.021011353,0.013343811,-0.014228821,-0.007709503,-0.0032348633,0.014160156,-0.015419006,-0.00037837029,0.015449524,-0.025909424,0.027297974,0.007434845,0.023620605,-0.015655518,0.015464783,0.0030822754,-0.026351929,-0.005973816,0.018814087,-0.040985107,0.017105103,0.005596161,-0.005329132,-0.05505371,0.026367188,0.027832031,-0.017913818,0.03616333,0.00969696,-0.015174866,0.006713867,0.0072250366,0.0026664734,-0.000105917454,-0.009521484,-0.017791748,0.034423828,0.03527832,0.008552551,0.012290955,-0.0113220215,-0.017105103,0.007835388,-0.003370285,-0.0011224747,-0.0077667236,-0.023452759,-0.0027389526,0.01448822,0.016067505,0.030166626,0.03756714,-0.02027893,-0.018585205,0.018493652,0.035003662,0.005264282,0.001039505,-0.0011835098,0.025344849,-0.028137207,0.043029785,0.04699707,0.021972656,0.047058105,0.0042533875,0.0035171509,0.012527466,-0.007637024,0.017608643,-0.033447266,0.0057907104,-0.004383087,0.01979065,-0.014923096,-0.04626465,0.029083252,-0.020080566,-0.025650024,-0.021240234,0.01133728,-0.0032958984,0.041168213,0.036743164,0.016738892,-0.029678345,0.06317139,-0.010482788,0.04611206,-0.0017700195,-0.02583313,0.04812622,0.026641846,0.034606934,0.009399414,0.020599365,-0.043395996,0.0110321045,0.042663574,0.01725769,0.014335632,-0.0008773804,-0.014892578,0.038085938,-0.0005221367,0.026916504,-0.011451721,0.0102005005,0.013252258,-0.008872986,-0.022094727,-0.005218506,-0.0041542053,-0.0026283264,0.046295166,-0.0087509155,-0.01184082,-0.019577026,-0.010772705,0.021148682,-0.0057144165,0.001461029,-0.00894928,-0.027435303,0.004852295,-0.036743164,-0.021148682,0.0158844,0.009025574,-0.04147339,-0.018432617,0.019760132,0.010299683,-0.029464722,0.026504517,0.016738892,0.011230469,0.0037174225,0.040985107,-0.017608643,0.021270752,-0.018081665,0.022888184,0.03881836,0.005290985,-0.024551392,0.0017518997,0.018081665,-0.011749268,0.01965332,0.024124146,-0.0010852814,0.0135269165,-0.0031604767,-0.0011329651,0.0006284714,-0.010665894,-0.009307861,0.008033752,-0.006881714,-0.010368347,0.004547119,-0.0019626617,-0.0037269592,0.021865845,-0.011123657,-0.017684937,0.015434265,0.037597656,0.023910522,-0.036499023,0.00047302246,0.008895874,-0.007286072,-0.027832031,-0.017532349,0.007621765,-0.034057617,0.006614685,0.02267456,0.011405945,0.028182983,-0.024459839,0.0029830933,0.0181427,-0.0026721954,0.017791748,0.002149582,-0.01260376,0.0031986237,-0.018325806,-0.008049011,-0.020874023,-0.0129470825,0.016159058,0.024902344,-0.009185791,-0.02128601,0.02935791,-0.0036010742,0.015533447,-0.007286072,-0.0071411133,0.018371582,0.00046110153,-0.007785797,-0.006755829,0.024383545,-0.010627747,-0.018829346,-0.019973755,0.033050537,0.046447754,-0.016952515,-0.01159668,0.023254395,0.018508911,0.023971558,0.04434204,0.014892578,0.045806885,0.017501831,-0.016159058,-0.016174316,0.017227173,0.0025310516,-0.01676941,0.025100708,-0.006893158,-0.020996094,0.015068054,-0.0041046143,-0.00024819374,-0.035125732,-0.019714355,-0.023025513,-0.032470703,0.018325806,0.005153656,0.010070801,-0.017150879,-0.005279541,0.0029582977,-0.02859497,-0.057128906,-0.0052223206,-0.0034446716,-0.012786865,-0.062347412,-0.0030727386,-0.027313232,0.014328003,-0.010063171,0.0008120537,-0.019348145,0.024902344,-0.010917664,-0.010032654,0.00024008751,0.019500732,0.03692627,0.010314941,0.016845703,-0.024932861,-0.010795593,-0.02609253,0.015640259,-0.01927185,0.023635864,0.0001937151,0.033599854,0.017166138,-0.0064964294,0.0040130615,-0.02154541,-0.0072898865,-0.014030457,-0.013801575,-0.019332886,0.021743774,0.010559082,-0.010063171,-0.0026340485,0.02960205,-0.022018433,-0.005432129,0.023651123,0.040985107,0.0017137527,0.023498535,-0.016159058,0.0022830963,-0.018478394,-0.007663727,-0.016052246,0.0058174133,0.008049011,0.010810852,-0.0016336441,0.0014686584,0.01878357,-0.011360168,-0.005996704,0.015670776,0.01625061,-0.005443573,0.03451538,0.025848389,0.00522995,-0.02027893,-0.0129470825,0.027008057,0.04019165,0.01222229,0.016494751,-0.008079529,0.01638794,-0.012466431,0.008384705,0.012664795,-0.016479492,-0.027923584,-0.021362305,-0.03265381,0.028457642,-0.0055236816,0.010948181,-0.009460449,0.00831604,-0.0128479,-0.034484863,-0.010009766,0.006259918,0.01424408,-0.015808105,-0.0021533966,0.010910034,0.010002136,-0.023071289,-0.007499695,-0.03527832,-0.041290283,-0.008125305,-0.021072388,0.021240234,0.008514404,-0.0061302185,-0.007904053,0.003156662,-0.0016088486,-0.014625549,0.02558899,-0.0059394836,-0.009414673,0.021575928,0.021362305,-0.029846191,0.022415161,-0.02154541,-0.005958557,0.011047363,-0.012687683,0.02017212,-0.015808105,0.04046631,0.0014505386,-0.009681702,0.033416748,0.00082826614,0.01878357,-0.022415161,-0.0004553795,0.011016846,-0.015594482,0.040008545,-0.016052246,-0.01133728,0.0015592575,-0.012557983,-0.02267456,0.009407043,0.019485474,0.033477783,0.00068950653,0.045318604,-0.009902954,-0.004009247,0.0065231323,0.012481689,-0.013244629,-0.0026607513,0.029464722,0.016098022,0.0013360977,-0.009239197,-0.004611969,-0.036071777,-0.0034217834,0.013664246,-0.0014038086,-0.003955841,0.029708862,0.011772156,0.043426514,-0.009414673,0.012466431,0.014945984,0.0003607273,0.040039062,0.0037193298,0.049560547,-0.011993408,-0.03213501,-0.0020656586,0.0009598732,-0.020080566,0.0044555664,-0.015098572,-0.008415222,-0.04458618,0.012458801,-0.0026187897,0.027236938,-0.019302368,0.021621704,-0.028213501,-0.019638062,-0.04724121,-0.019165039,-0.04031372,0.008300781,0.022659302,0.0016555786,0.030838013,0.008407593,-0.021118164,0.030517578,0.053771973,-0.0037879944,-0.037139893,-0.008918762,0.008453369,-0.0039901733,0.0146484375,0.012649536,-0.015380859,-0.022659302,-0.0051841736,-0.020523071,0.01940918,-0.018508911,0.021331787,0.015113831,-0.004764557,-0.005672455,0.035247803,-0.010826111,0.0042037964,0.021377563,-0.0024795532,0.035125732,0.024810791,-0.022872925,0.026123047,0.015975952,-0.058380127,0.062683105,-0.0007033348,0.039245605,-0.009902954,0.017044067,-0.04055786,-0.021987915,-0.009780884,0.004760742],"createdAt":"2026-04-21T18:32:27.090Z","updatedAt":"2026-04-22T02:32:08.155Z","lastSeenAt":"2026-04-22T02:32:08.155Z","tsv":"'/api':191 '/api/v1/messages/75':122,230 '/pricing':192 '/readme':194 '/request':19,38 '0.02':18,37,94,153 '000':142 '0x8335':147 '20':141 '2913':148 '300':170 '402 payment api' '6':157 'accept':130 'access':128 'across':54 'addit':206 'advertis':136 'agent':248 'ai':12,31,63 'ai-inference' 'analysi':67 'analyt':58 'api':5,24,45,109,127 'avail':221 'base':8,27,102,143,150 'base network api' 'behind':228 'beyond':184 'broad':50 'call':4,23 'catalog':51 'categori':56 'challeng':135 'cheap api' 'classif':70 'classification' 'commit':117 'connect':202 'content':207 'convers':87 'cost':139 'crawl':224 'data':11,30,57 'data-analytics' 'decim':158 'describ':124 'document':183,216,258 'embed':71 'embeddings' 'enabl':44 'endpoint':16,35,53,90,120,243,259 'equal':152 'estim':81 'exact':226 'exampl':220 'exchang':76 'export':61 'expos':48 'feed':75 'financ':13,32,72 'finance-data' 'four':55 'function':227 'gas':80 'generat':88 'geocod':85 'geocoding' 'given':154 'header':167 'homepag':247 'http':180 'indic':177 'infrastructur':83 'insight':62 'interfac':182 'key':110 'land':186 'learn':65 'limit':113 'list':244 'live':254 'low payment fee' 'lowpaymentfee.com':39 'machin':64 'made':161 'map':237 'maximum':138 'metric':59 'micropayment api' 'name':242 'network':103 'offer':10,29 'openapi':211 'output':175 'page':187 'path':231 'pay':2,21 'pay per call api' 'pay-per-cal':1,20 'pay-per-request' 'payabl':97 'payment':159,166 'per':3,22,95 'platform':6,25,46 'post':131,181 'premium':126 'price':74,92 'prompt':203 'protocol':107 'quot':79 'rate':77,112 'report':60 'request':96,132 'request/response':214 'resolv':197 'rout':195 'schema':176,215 'second':171 'sentiment':66 'sentiment-analysis' 'spars':189 'spec':212 'specif':119 'standard':179 'summar':69 'text':68 'text-summarization' 'timeout':172 'token':78 'treat':250 'unclear':233 'under-docu':256 'unit':144 'upfront':116 'usag':219 'usdc':9,28,99,146,155 'usdc api' 'usdc-base' 'util':15,34,84 'utility-apis' 'valid':86 'via':104,162 'wallet':201 'wallet-connect':200 'web3':73 'window':173 'x':165 'x-payment':164 'x402':43,106,134 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"65432427-3901-4dc0-bcad-07a9666fdc59","listingId":"6efc8af8-6988-4898-9ca9-1438c387d2ab","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:27.090Z"}],"sources":[{"listingId":"6efc8af8-6988-4898-9ca9-1438c387d2ab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/messages/75","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.090Z","lastSeenAt":"2026-04-22T02:32:08.155Z"}],"details":{"listingId":"6efc8af8-6988-4898-9ca9-1438c387d2ab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/messages/75 \\\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/75 advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/v1/messages/75"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference (sentiment, summarization, classification, embeddings) on a per-call basis without API keys","Fetching real-time financial data such as token quotes, gas estimates, and exchange rates","Running data analytics queries (metrics, reports, insights) with micro-payments","Geocoding and data validation via utility endpoints"],"bestFor":["Agents or developers who want instant, keyless API access with crypto micropayments","Low-volume or bursty workloads where per-request pricing avoids subscription overhead","Web3-native applications already operating on the Base network with USDC"],"notFor":["High-volume production workloads that need SLA guarantees and detailed documentation","Users without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:59.943Z"},"updatedAt":"2026-04-22T02:32:08.155Z"}}