{"id":"1fe195e3-e21f-4d64-a546-d480ed0226c4","shortId":"LJLcsU","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/messages/61` appears to be one of many endpoints offered by the provider, which advertises a broad catalog spanning data & analytics, AI & machine learning (sentiment analysis, 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 with no API keys, no rate limits, and no minimum commitments.\n\nThe x402 challenge for this specific endpoint (`/api/v1/messages/61`) is live and returns a 402 with `maxAmountRequired` of 20000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The endpoint accepts HTTP POST requests.\n\nNote: The specific functionality of the `/api/v1/messages/61` path is not documented on the landing page — it does not appear in the listed catalog of endpoints. The description simply says \"Premium API Access\" with no further detail on what data or service this particular message endpoint returns. Without OpenAPI specs, request/response schemas, or documentation beyond the landing page, the actual behavior of this endpoint is unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","no-api-key","no-rate-limit"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee","messages API"],"warnings":["The /api/v1/messages/61 endpoint is not listed in the provider's published API catalog — its specific functionality is unknown.","No OpenAPI specification, request schema, or response schema is available.","The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content.","Without documentation, the actual data or service returned by this endpoint cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/messages/61","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/61","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/messages/61 is undocumented. No OpenAPI spec, no request/response schema, no examples, and no docs beyond a landing page listing other endpoints. This path doesn't even appear in the provider's own catalog.","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":"2026-04-21T23:18:32.538Z","embedding":[-0.015808105,-0.044311523,0.0619812,0.014091492,0.0041236877,-0.02368164,-0.021850586,0.045776367,0.06341553,-0.07757568,0.024749756,-0.046142578,-0.04095459,-0.030792236,-0.020187378,0.023803711,-0.004650116,-0.0047187805,-0.039611816,0.03692627,0.045166016,-0.034301758,-0.016296387,0.042175293,-0.011161804,-0.03060913,-0.014862061,-0.0062561035,0.004081726,-0.049102783,0.026611328,-0.029373169,-0.008338928,-0.0011816025,-0.037231445,-0.008354187,-0.0064048767,0.04525757,0.026535034,-0.029891968,0.0019016266,-0.059265137,0.006401062,-0.00065135956,-0.06100464,0.0055999756,0.010467529,-0.014930725,-0.004047394,0.0065612793,-0.024047852,-0.008895874,0.004501343,-0.0015306473,0.005630493,0.0015335083,-0.0032043457,-0.008552551,0.017028809,-0.0014066696,0.0028591156,-0.06359863,-0.021499634,-0.031143188,0.016860962,0.064208984,0.0018577576,0.045654297,0.008934021,0.07336426,0.03857422,0.055603027,0.023406982,0.007419586,-0.005256653,-0.015289307,0.00022542477,0.060913086,-0.015213013,-0.036010742,-0.021057129,-0.016067505,-0.052703857,0.0020923615,-0.017990112,-0.030685425,-0.012390137,0.030090332,-0.02949524,0.01461792,-0.0715332,-0.011810303,-0.015701294,-0.0023994446,0.008232117,-0.01600647,-0.035186768,0.022079468,-0.013793945,0.0015449524,0.020401001,-0.045806885,0.0121536255,0.016677856,0.024429321,0.05621338,0.035705566,0.03677368,-0.003917694,-0.015548706,-0.023254395,0.022750854,-0.0038032532,-0.015060425,0.020111084,0.0121536255,-0.019500732,0.021835327,-0.017150879,0.026947021,-0.055847168,0.03427124,0.007980347,-0.01360321,0.01008606,-0.046203613,0.0061073303,0.017196655,-0.026062012,0.0017004013,0.025909424,0.017150879,0.038909912,-0.020965576,-0.029785156,0.0033302307,-0.014427185,-0.025878906,-0.054473877,-0.032989502,0.033172607,-0.027435303,0.016830444,0.035125732,-0.08355713,-0.011177063,-0.041259766,0.00598526,-0.034210205,-0.016235352,-0.008644104,0.022125244,-0.015083313,-0.010902405,-0.036346436,-0.023712158,0.010047913,0.026519775,-0.015625,0.06109619,-0.0028495789,0.019851685,0.018707275,0.00056648254,0.025466919,0.022735596,0.018829346,-0.068237305,-0.0725708,-0.021987915,-0.01878357,-0.028442383,-0.022537231,0.011741638,0.0022583008,-0.06567383,-0.018463135,-0.02671814,-0.013580322,-0.037261963,0.006690979,-0.034118652,0.0031604767,-0.0030593872,-0.058624268,-0.025863647,-0.026794434,0.0736084,0.019897461,0.0043907166,0.03829956,-0.024993896,0.06945801,0.013305664,-0.034942627,-0.03149414,0.025924683,-0.032806396,0.019500732,-0.004787445,-0.00053834915,-0.024154663,0.044891357,0.059143066,0.010345459,-0.02758789,-0.013267517,-0.03262329,-0.036590576,-0.02746582,0.010757446,-0.00005340576,0.009735107,0.033599854,-0.033172607,-0.037231445,-0.0025691986,0.0035552979,-0.007091522,0.04333496,0.0046539307,-0.0102005005,0.024612427,0.014129639,-0.037261963,0.035491943,0.037963867,0.015853882,-0.0357666,-0.020309448,0.028900146,0.009590149,-0.024490356,0.0031719208,-0.0072250366,0.035827637,-0.0038776398,0.032989502,0.021408081,-0.01576233,-0.019119263,-0.041778564,0.010375977,0.033294678,0.0049934387,-0.032806396,-0.039520264,-0.077941895,0.036987305,0.048095703,0.056427002,-0.009590149,0.0010299683,-0.030960083,-0.009162903,-0.060638428,0.053344727,0.07147217,-0.01725769,-0.015022278,0.016220093,-0.022827148,-0.039733887,-0.00081157684,-0.002204895,-0.038330078,-0.0018854141,0.011749268,-0.0362854,0.0039711,0.008964539,0.020523071,0.054840088,0.00038409233,-0.055999756,-0.027618408,0.0058555603,0.0024929047,-0.021560669,-0.0019273758,0.010879517,0.018295288,0.024597168,-0.018295288,0.018234253,-0.005706787,0.040222168,-0.0033912659,-0.013656616,-0.026687622,-0.04107666,0.0061416626,-0.008972168,-0.07269287,0.002986908,0.0063095093,0.065979004,-0.047302246,0.034606934,0.003818512,0.0051879883,0.053741455,0.00548172,-0.060028076,0.01626587,0.030319214,0.035369873,0.047851562,0.00932312,-0.045013428,0.0022068024,0.07489014,-0.035064697,-0.0017938614,0.002653122,0.013809204,0.025466919,0.0029029846,-0.05807495,-0.03265381,-0.013221741,-0.02142334,0.017074585,-0.029037476,0.004245758,-0.0077285767,0.016235352,-0.02029419,0.005722046,-0.02331543,0.015548706,-0.013511658,0.016998291,-0.013267517,-0.018341064,0.03189087,-0.005428314,-0.012565613,0.013267517,0.040252686,0.025131226,-0.0020923615,-0.031402588,-0.03173828,-0.030303955,-0.014579773,0.019042969,0.01940918,0.014892578,0.04827881,-0.04840088,0.01461792,0.040496826,0.024536133,0.04736328,-0.0068473816,0.017318726,-0.056640625,-0.050354004,-0.032073975,-0.044403076,0.02848816,0.010353088,-0.0033340454,0.05935669,0.017303467,-0.02911377,-0.048797607,0.017593384,-0.04144287,-0.008743286,0.026794434,-0.0146484375,-0.03201294,0.00844574,0.010375977,-0.0069122314,0.01838684,0.01461792,0.013259888,0.06536865,0.04446411,-0.017593384,0.020874023,0.010658264,0.014083862,0.010627747,-0.029525757,-0.0064430237,-0.012779236,0.024520874,-0.005004883,-0.016403198,-0.054992676,0.048461914,0.06225586,0.06951904,0.021636963,0.015045166,0.042022705,-0.008033752,0.011383057,-0.02809143,-0.0064888,-0.036590576,-0.039093018,0.009880066,-0.010772705,-0.026687622,-0.01285553,0.023742676,0.004776001,0.023666382,-0.03086853,0.04901123,0.004753113,-0.00033020973,0.013168335,-0.0037231445,0.031555176,0.05822754,-0.044677734,0.027679443,0.026977539,-0.024932861,0.004009247,0.040039062,-0.012756348,-0.0017795563,-0.050079346,-0.024871826,-0.0119018555,-0.010421753,-0.049926758,-0.0019226074,-0.008728027,0.015113831,0.038482666,-0.016098022,-0.029937744,0.0031604767,-0.009407043,-0.06161499,-0.016540527,-0.031829834,0.023406982,0.048339844,-0.011016846,0.014091492,0.015045166,-0.007671356,-0.020187378,0.006259918,-0.0024757385,-0.0010585785,-0.042816162,0.027679443,0.020233154,0.015563965,0.010955811,0.016174316,0.006755829,0.034118652,0.03829956,0.004070282,-0.029708862,-0.05596924,0.008628845,-0.048614502,0.019012451,0.0152282715,-0.016098022,-0.0034008026,-0.026763916,0.00013399124,-0.029266357,0.007549286,-0.027572632,0.011695862,0.036895752,-0.036346436,-0.022781372,-0.053741455,-0.022964478,-0.019210815,0.06011963,0.041381836,-0.010757446,-0.055755615,-0.0027160645,0.0049552917,0.009864807,-0.0010700226,-0.0141067505,-0.015365601,-0.010124207,-0.020370483,-0.0033874512,-0.010047913,-0.0005145073,-0.014709473,-0.015174866,0.037078857,-0.003780365,0.034606934,-0.007522583,0.0027389526,0.04547119,-0.017913818,0.002544403,-0.023666382,0.0256958,0.005027771,-0.01927185,-0.04434204,0.03704834,0.010276794,0.03643799,-0.026107788,0.0006532669,0.008071899,0.020614624,0.013916016,-0.015533447,-0.0041275024,-0.007698059,-0.06628418,-0.084106445,0.042266846,-0.013916016,0.04345703,0.016479492,0.018463135,0.020050049,0.010383606,-0.011474609,0.016159058,-0.025665283,-0.013038635,-0.017059326,-0.029006958,-0.016967773,-0.0047798157,-0.0118637085,0.0129470825,-0.009887695,0.0032463074,0.016860962,-0.02571106,0.01751709,-0.004535675,0.0059547424,0.018188477,0.00422287,0.022277832,0.0362854,-0.011039734,-0.038482666,0.025115967,0.0076065063,0.0069618225,-0.007091522,0.04296875,0.038238525,-0.014183044,-0.016662598,-0.006259918,-0.001405716,-0.022872925,0.000007688999,0.013877869,0.021850586,-0.0099105835,-0.021911621,0.015029907,0.006969452,-0.034088135,-0.011146545,0.009056091,0.014656067,-0.023605347,0.015731812,0.033966064,0.046325684,-0.02911377,-0.008163452,0.0042877197,0.02758789,0.027313232,0.02355957,-0.02003479,0.009849548,0.00013101101,0.027694702,-0.0067710876,-0.01876831,0.0066604614,0.0013208389,0.02659607,0.01574707,0.019607544,-0.023391724,-0.023651123,0.006248474,-0.004562378,-0.014450073,0.0066719055,0.01763916,0.03439331,-0.019088745,0.014083862,0.010696411,-0.027572632,-0.028289795,-0.012420654,0.036102295,-0.010009766,-0.01600647,0.020614624,0.01751709,0.037200928,-0.049865723,0.0033950806,-0.0027446747,0.0063476562,-0.026275635,-0.039123535,-0.039886475,0.026229858,0.020370483,0.014411926,0.02027893,0.0287323,-0.007270813,-0.0018730164,0.024291992,0.0049972534,-0.015823364,-0.014503479,-0.032592773,0.006919861,-0.005104065,0.009124756,-0.032806396,0.005706787,-0.013427734,-0.02607727,0.005706787,-0.007762909,-0.0018320084,-0.015792847,0.020324707,0.03918457,0.0039367676,0.010757446,-0.014907837,-0.024505615,0.0010547638,0.016601562,0.011878967,-0.04864502,0.023254395,-0.015686035,0.007549286,0.0032176971,0.008758545,0.01838684,0.020385742,-0.004020691,0.026351929,-0.037994385,0.030471802,-0.01776123,0.013282776,0.00006568432,-0.047454834,-0.011703491,-0.032836914,-0.015289307,0.03173828,-0.018157959,-0.02520752,-0.018234253,-0.027175903,-0.004962921,-0.045135498,0.01260376,0.038482666,0.0340271,-0.032562256,0.009979248,-0.006755829,0.0019435883,-0.01209259,0.027267456,-0.010643005,0.01626587,0.022903442,0.0073547363,-0.045135498,-0.013137817,-0.0181427,-0.001581192,-0.035339355,-0.046417236,-0.024032593,0.0009531975,-0.011749268,0.0037784576,-0.02468872,-0.016723633,-0.010353088,-0.042388916,0.020019531,0.00969696,0.01386261,0.00040340424,-0.012557983,-0.0023899078,0.020187378,-0.0076828003,0.035186768,0.005470276,-0.013046265,-0.045806885,-0.0009484291,0.034606934,0.03225708,0.0016021729,0.006061554,0.00091314316,-0.003868103,-0.05419922,-0.009216309,-0.004306793,-0.013504028,-0.008728027,0.005142212,-0.040405273,0.002790451,-0.026016235,0.00019705296,0.023147583,-0.0046691895,0.012374878,0.0029830933,0.0060691833,-0.012802124,-0.020019531,-0.033843994,0.021087646,0.0101623535,0.0104522705,0.013206482,0.051879883,0.021026611,-0.006679535,0.007194519,0.0022945404,0.014816284,-0.012901306,0.0036811829,-0.017959595,0.007446289,-0.014709473,-0.006893158,-0.037628174,-0.01436615,0.094177246,-0.012931824,-0.010932922,-0.0046424866,-0.0109939575,0.0184021,0.033477783,-0.04586792,0.0022468567,-0.030197144,0.02255249,-0.026321411,0.023361206,0.020309448,0.01637268,-0.0211792,-0.053955078,-0.011886597,-0.0016670227,-0.021591187,-0.062561035,-0.022903442,-0.05126953,-0.006614685,-0.016326904,-0.011451721,-0.006187439,0.012229919,-0.006252289,-0.08441162,-0.0011463165,0.050720215,0.01171875,0.022323608,-0.014129639,0.00071048737,0.020507812,-0.035461426,-0.013084412,0.040374756,-0.029144287,-0.0107421875,-0.02659607,0.03540039,-0.009063721,-0.028411865,0.014259338,-0.0027751923,0.015792847,-0.0126953125,0.012390137,-0.029159546,0.016601562,-0.014274597,0.027420044,-0.01033783,-0.016479492,0.038848877,-0.058013916,0.015319824,0.028823853,-0.008155823,-0.0063819885,0.03363037,0.03149414,-0.037322998,-0.018310547,0.012969971,-0.00774765,0.045135498,-0.028335571,0.033599854,0.013679504,-0.016418457,0.016143799,-0.0060768127,-0.024749756,-0.034698486,-0.03817749,0.027618408,-0.000011026859,0.001742363,-0.014259338,0.013343811,0.009475708,0.00007581711,0.011039734,-0.00047016144,-0.047668457,-0.011711121,0.000032365322,0.01008606,0.006427765,0.0010728836,0.020065308,0.004764557,0.03463745,0.009613037,-0.008598328,-0.010681152,0.026184082,-0.010177612,0.007587433,0.023162842,-0.00491333,0.020324707,0.024536133,0.007858276,-0.038635254,-0.015197754,-0.024429321,-0.0020694733,0.008033752,-0.008125305,-0.017120361,-0.009689331,0.009475708,-0.001241684,-0.031677246,0.016845703,-0.025756836,-0.036499023,0.0030784607,-0.017181396,0.010055542,0.0051841736,0.014328003,0.025009155,-0.013412476,0.037902832,0.008560181,-0.020889282,0.013900757,0.025283813,-0.0002977848,-0.0390625,0.002904892,0.005622864,-0.012435913,0.0020370483,-0.023361206,0.01953125,0.04522705,-0.008277893,0.013435364,0.0022220612,0.024642944,-0.016723633,0.005092621,-0.0058403015,0.011161804,-0.01890564,0.027008057,-0.051696777,0.022155762,0.008171082,-0.008003235,-0.012916565,-0.014030457,-0.039520264,0.018234253,0.0068969727,-0.013008118,0.04083252,0.0041618347,0.02168274,-0.021499634,-0.0020580292,-0.010749817,-0.0340271,-0.019042969,0.031097412,0.011268616,0.006706238,0.022903442,-0.027023315,0.04727173,-0.03527832,0.015045166,0.006500244,-0.0015230179,-0.016693115,-0.023330688,-0.01209259,-0.0061912537,-0.017044067,-0.002506256,0.00031614304,0.045318604,0.026748657,0.03503418,0.038909912,0.012138367,0.0071640015,-0.049743652,-0.034088135,0.00028252602,-0.025436401,0.029403687,-0.02053833,0.060455322,0.034118652,-0.011795044,0.031219482,0.0340271,0.028518677,0.0029449463,0.02015686,-0.011329651,0.004753113,-0.0135269165,0.0368042,0.012039185,0.040618896,-0.03024292,0.028289795,0.030349731,0.017211914,-0.026046753,0.030273438,0.06100464,0.02607727,-0.007408142,0.041137695,0.009887695,-0.013656616,-0.00076055527,-0.028808594,0.04714966,0.0055122375,0.054534912,0.033813477,0.013847351,-0.0077819824,0.028823853,-0.031951904,-0.027908325,0.04824829,0.038116455,-0.024597168,-0.009155273,-0.008895874,-0.0042266846,-0.0501709,-0.03466797,0.012130737,-0.01159668,0.016342163,-0.003921509,-0.0071487427,-0.0056419373,0.016326904,0.03778076,0.022857666,-0.006790161,0.022155762,0.027496338,0.00051784515,0.022659302,0.0038318634,0.0140686035,-0.035491943,-0.013977051,0.03189087,0.01966858,-0.019042969,-0.002401352,0.019821167,0.016464233,0.056121826,0.04550171,-0.028289795,0.004322052,0.041137695,0.0093688965,-0.0068588257,0.05380249,0.037231445,0.009765625,0.029296875,0.04147339,0.020706177,-0.040618896,0.01751709,0.0024318695,0.0069503784,-0.0075683594,-0.004348755,0.015899658,-0.0023021698,0.006690979,0.0029468536,-0.018981934,0.022460938,0.015235901,0.0011386871,-0.0041122437,-0.007873535,0.026794434,-0.013793945,0.0024204254,0.010093689,-0.019317627,0.04119873,-0.006477356,0.036346436,-0.01939392,0.014083862,0.002023697,-0.026443481,-0.0025730133,0.027832031,-0.03793335,0.008163452,0.00819397,-0.0019245148,-0.053894043,0.01727295,0.028396606,-0.020095825,0.028182983,0.010795593,-0.002521515,0.011871338,0.01838684,0.0008735657,0.002588272,-0.009346008,-0.025146484,0.027679443,0.04067993,0.0129776,0.018493652,-0.013961792,-0.016113281,0.010124207,-0.008583069,-0.0019721985,-0.0036754608,-0.013961792,-0.022232056,0.01449585,0.02784729,0.026611328,0.025939941,-0.007411957,-0.01399231,0.0040245056,0.02947998,0.0146865845,-0.001745224,-0.019195557,0.0154953,-0.015472412,0.04638672,0.040405273,0.022064209,0.048431396,-0.004764557,-0.010665894,0.00007170439,-0.007873535,0.021896362,-0.028366089,0.0019893646,-0.0068969727,0.030807495,-0.01751709,-0.036621094,0.015060425,-0.014595032,-0.0178833,-0.01777649,0.0027923584,0.0031814575,0.025939941,0.038726807,0.011489868,-0.024383545,0.0635376,-0.01637268,0.042877197,-0.0051574707,-0.0056114197,0.038116455,0.016082764,0.03527832,0.017959595,0.018722534,-0.041870117,0.012397766,0.040740967,0.021911621,0.012245178,0.0030231476,-0.025970459,0.038085938,0.0072021484,0.022567749,-0.020767212,0.0012512207,0.01461792,-0.009223938,-0.013641357,-0.003227234,-0.014183044,0.013435364,0.05218506,-0.021072388,-0.0082473755,-0.015029907,-0.017227173,0.022766113,-0.008720398,-0.0028476715,0.014198303,-0.032073975,0.013671875,-0.043701172,-0.020187378,0.010620117,0.01979065,-0.035339355,-0.023223877,0.005004883,0.011833191,-0.03250122,0.025543213,0.015419006,0.0056114197,0.004737854,0.048431396,-0.019485474,0.025665283,-0.02355957,0.022201538,0.041992188,-0.007511139,-0.020523071,0.010368347,0.006088257,-0.013671875,0.0035171509,0.029891968,-0.011146545,0.015792847,0.0014982224,-0.020858765,0.017745972,0.002155304,-0.011741638,-0.00053310394,-0.014854431,-0.018005371,-0.000041663647,0.0067825317,-0.001950264,0.0134887695,-0.0103302,-0.011886597,0.010467529,0.051879883,0.012573242,-0.04071045,0.0067825317,0.01007843,0.0055618286,-0.029312134,-0.00881958,0.012130737,-0.026672363,0.007446289,0.014518738,0.0070343018,0.018859863,-0.021392822,-0.0047912598,0.03503418,0.022018433,0.020431519,-0.00024724007,0.0053634644,0.024139404,-0.018341064,-0.004798889,-0.010665894,-0.005706787,0.011581421,0.019302368,-0.02029419,-0.024093628,0.032073975,-0.0074653625,0.019241333,-0.009300232,-0.02116394,0.017242432,-0.0003042221,-0.014709473,0.0018806458,0.021026611,-0.016021729,-0.018417358,-0.026748657,0.034118652,0.050567627,-0.009147644,-0.008987427,0.030654907,0.021728516,0.02545166,0.035003662,0.006866455,0.04751587,0.024230957,-0.028213501,-0.015823364,0.021484375,-0.008720398,-0.016540527,0.014160156,-0.014839172,-0.015945435,0.006958008,0.017578125,-0.009140015,-0.030349731,-0.019195557,-0.020126343,-0.033447266,0.016464233,-0.017105103,0.0011043549,-0.023513794,-0.0058631897,0.0040664673,-0.026184082,-0.042510986,-0.014709473,0.003835678,-0.007843018,-0.05090332,0.01322937,-0.030014038,0.020828247,-0.0035552979,-0.011650085,-0.020324707,0.025161743,-0.01612854,-0.011779785,0.015731812,0.023788452,0.020874023,0.015960693,0.0284729,-0.026535034,-0.02720642,-0.02885437,0.0059776306,-0.020874023,0.029678345,-0.006996155,0.027175903,0.018310547,0.015701294,-0.0016002655,-0.009498596,-0.00630188,-0.014953613,-0.023330688,-0.016098022,0.016799927,0.011550903,-0.012809753,-0.010948181,0.046691895,-0.0234375,-0.0135650635,0.023971558,0.0423584,0.010139465,0.039733887,-0.015403748,-0.005455017,-0.023162842,0.0024433136,-0.027511597,0.009819031,-0.0018100739,0.0016107559,-0.018051147,-0.009346008,0.01953125,-0.004055023,-0.005706787,0.016937256,-0.010787964,-0.0093688965,0.0231781,0.016571045,0.0020923615,-0.018096924,-0.020095825,0.028900146,0.033050537,0.013336182,-0.0015678406,-0.013900757,0.0151901245,-0.013160706,0.008735657,0.02645874,-0.017120361,-0.031921387,-0.018295288,-0.039276123,0.029418945,0.0075302124,0.022628784,-0.009063721,0.010147095,-0.02142334,-0.026641846,-0.010231018,0.010894775,0.008293152,0.003917694,0.006137848,0.010787964,0.007083893,-0.026184082,-0.004585266,-0.034729004,-0.02911377,-0.0015277863,-0.020523071,0.0256958,0.008491516,-0.00945282,-0.011062622,-0.003042221,-0.005908966,-0.004638672,0.03050232,-0.017242432,-0.014053345,0.022140503,0.02381897,-0.031311035,0.013031006,-0.018966675,-0.00466156,0.03186035,-0.004989624,0.019989014,-0.019821167,0.041931152,0.0013580322,-0.009109497,0.031799316,0.013618469,0.016403198,-0.027648926,0.00440979,0.0043640137,-0.00894165,0.019226074,-0.024398804,-0.011367798,0.0013952255,-0.029190063,-0.037902832,0.010383606,0.027832031,0.039764404,-0.0044898987,0.03353882,-0.020080566,-0.026290894,0.010276794,0.00016629696,-0.031204224,-0.0068740845,0.04534912,0.009216309,-0.0043029785,-0.009780884,-0.010681152,-0.044433594,-0.0034427643,0.015274048,0.011405945,-0.014198303,0.03302002,0.010574341,0.0390625,-0.010848999,0.012802124,0.0043754578,0.0016374588,0.028060913,0.0075798035,0.05529785,-0.010139465,-0.024307251,0.0036067963,-0.0048103333,-0.030792236,-0.006816864,-0.015266418,-0.0061798096,-0.047210693,0.020950317,0.005554199,0.032806396,-0.024291992,0.015991211,-0.030059814,-0.008644104,-0.04699707,-0.02468872,-0.03552246,0.010223389,0.035827637,0.0024166107,0.021011353,0.013015747,-0.020050049,0.015151978,0.050567627,-0.013694763,-0.03186035,-0.0048294067,0.017684937,0.0003824234,0.00818634,0.02204895,-0.0058784485,-0.02720642,-0.00075006485,-0.016036987,0.0073547363,-0.0017700195,0.01033783,0.013694763,-0.0140686035,-0.0016889572,0.031173706,-0.008003235,0.009422302,0.01084137,0.0037193298,0.03253174,0.046966553,-0.0075302124,0.028656006,0.028396606,-0.0496521,0.057922363,0.0010309219,0.026382446,-0.021102905,0.008590698,-0.04159546,-0.019012451,-0.020767212,0.009712219],"createdAt":"2026-04-21T18:32:27.167Z","updatedAt":"2026-04-22T02:32:08.228Z","lastSeenAt":"2026-04-22T02:32:08.228Z","tsv":"'/api/v1/messages/61':47,125,173 '/request':13,28 '0.02':12,27,97,145 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':160 '0x8335':140 '20000':135 '402':131 '6':149 'Base network API' 'USDC micropayment API' 'accept':163 'access':7,22,38,198 'actual':225 'address':159 'advertis':60 'ai':67 'analysi':71 'analyt':66 'api':6,21,37,109,197 'appear':48,185 'base':9,24,105,136,142 'behavior':226 'beyond':220 'broad':62 'call':4,19 'catalog':63,189 'challeng':120 'classif':73 'commit':117 'convers':90 'data':65,205 'decim':150 'descript':193 'detail':202 'document':177,219 'embed':74 'endpoint':32,54,93,124,162,191,211,229 'equal':144 'estim':84 'exact':156 'exchang':79 'feed':78 'financ':75 'function':170 'gas':83 'generat':91 'geocod':88 'given':146 'http':164 'http-post' 'infrastructur':86 'key':110 'land':180,222 'learn':69 'limit':113 'list':188 'live':127 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'made':153 'mani':53 'maxamountrequir':133 'messag':210 'messages API' 'minimum':116 'network':106 'no-api-key' 'no-rate-limit' 'note':167 'offer':55 'one':51 'openapi':214 'page':181,223 'particular':209 'path':46,174 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':100 'payment':42,151 'per':3,18,98 'post':165 'premium':5,20,36,196 'premium API' 'price':77,95 'protocol':43 'provid':35,58 'quot':82 'rate':80,112 'request':99,166 'request/response':216 'return':129,212 'say':195 'schema':217 'scheme':157 'sentiment':70 'servic':207 'simpli':194 'span':64 'spec':215 'specif':45,123,169 'summar':72 'token':81 'unclear':231 'unit':137 'usdc':15,30,102,139,147 'usdc-base' 'util':87 'valid':89 'via':10,25,39,154 'web3':76 'without':213 'x402':11,26,41,119 'x402 endpoint' 'x402-payment'","prices":[{"id":"5007b2b7-8a6b-40c3-946d-19a710197f52","listingId":"1fe195e3-e21f-4d64-a546-d480ed0226c4","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/61","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:27.167Z"}],"sources":[{"listingId":"1fe195e3-e21f-4d64-a546-d480ed0226c4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/messages/61","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.167Z","lastSeenAt":"2026-04-22T02:32:08.228Z"}],"details":{"listingId":"1fe195e3-e21f-4d64-a546-d480ed0226c4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/messages/61 \\\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 provider lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure, all priced at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, instant access, on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/messages/61"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Making micropayments in USDC on Base for on-demand API access","Integrating agent-purchasable endpoints into automated workflows"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto-native micropayments over traditional API billing"],"notFor":["Users needing detailed documentation or OpenAPI schemas before integration","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:59.937Z"},"updatedAt":"2026-04-22T02:32:08.228Z"}}