{"id":"f5f1a072-da9f-4ad8-9c27-291623945038","shortId":"95MSMe","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 a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transactions/38` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or subscriptions are required — each request is paid individually via an X-PAYMENT header containing a signed payment.\n\nThe broader platform advertises multiple API categories including 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 listed at the same $0.02/request price point.\n\nHowever, the specific endpoint probed (`/api/v1/transactions/38`) does not clearly map to any of the advertised API categories on the landing page. Its description is simply \"Premium API Access\" with no further documentation on what data or functionality it returns. The docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or example responses, the actual behavior of this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","crypto"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","402 payment API"],"warnings":["No documentation available — docs, pricing, and API pages all return only 'Connect wallet' with no content","The endpoint path /api/v1/transactions/38 does not correspond to any of the advertised API categories on the landing page","No response schema or example output is available; actual endpoint behavior is unknown","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/38","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), but there is no documentation, no OpenAPI schema, no example responses, and the endpoint path '/api/v1/transactions/38' doesn't match any advertised API on the landing page. The docs/pricing/API pages are all 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":"2026-04-19T13:22:47.798Z","embedding":[-0.035888672,-0.03326416,0.039123535,0.017486572,0.019943237,-0.02897644,-0.025802612,0.028305054,0.076293945,-0.063964844,0.01675415,-0.03201294,-0.03805542,-0.032348633,-0.0256958,0.0039749146,-0.0011177063,0.00566864,-0.033203125,0.032226562,0.029907227,-0.023712158,-0.040893555,0.020187378,-0.001458168,-0.011459351,-0.005268097,-0.011787415,-0.019256592,-0.042053223,0.046539307,-0.024978638,-0.0020389557,0.0051345825,-0.02204895,-0.024429321,0.0016450882,0.030807495,0.029388428,-0.0042762756,0.004180908,-0.04776001,-0.0054359436,-0.016830444,-0.055145264,0.01008606,-0.0070114136,-0.02192688,0.010871887,-0.000954628,-0.04043579,-0.01727295,-0.015213013,0.004547119,0.009773254,0.0048828125,0.0027313232,-0.025680542,0.011421204,0.016647339,-0.014305115,-0.061523438,-0.017608643,-0.004611969,0.0010414124,0.06451416,-0.0047836304,0.03930664,0.006164551,0.062805176,0.039794922,0.044708252,0.027999878,0.021865845,0.003063202,0.0056266785,-0.004310608,0.053619385,-0.026565552,-0.020477295,-0.004135132,-0.003660202,-0.05105591,0.008872986,-0.018508911,-0.040618896,-0.016860962,0.0104522705,-0.017425537,0.020141602,-0.07678223,-0.002664566,-0.0011138916,-0.0031051636,0.0051193237,-0.012901306,-0.0049438477,0.020904541,-0.01612854,0.011955261,-0.0032749176,-0.04348755,0.028762817,0.018035889,0.037750244,0.03970337,0.020950317,0.02748108,0.0099487305,-0.0063438416,-0.021835327,0.020401001,-0.012046814,-0.004573822,0.009231567,0.011680603,-0.011871338,0.012649536,-0.026824951,0.019378662,-0.05496216,0.04309082,0.010063171,0.0005207062,0.0030403137,-0.039611816,-0.013412476,0.025543213,-0.031799316,-0.011634827,0.020767212,0.01966858,0.020324707,-0.018173218,-0.03149414,0.009780884,-0.019470215,-0.0031490326,-0.055511475,-0.0345459,0.03945923,-0.028762817,0.021331787,0.041259766,-0.11065674,-0.0062217712,-0.04119873,0.017837524,-0.036590576,-0.006298065,0.0017204285,0.025741577,-0.022140503,-0.018875122,-0.027893066,-0.027816772,0.011184692,0.032196045,-0.023147583,0.050048828,-0.027908325,0.01977539,0.025100708,0.020690918,0.0124053955,0.015640259,-0.005630493,-0.08453369,-0.08300781,-0.019012451,-0.006565094,-0.020629883,-0.032928467,0.015808105,-0.010795593,-0.07159424,-0.024368286,-0.020843506,0.008666992,-0.029830933,-0.005569458,-0.033233643,0.018112183,-0.015731812,-0.06021118,-0.027679443,-0.034606934,0.0635376,0.028945923,0.022018433,0.027633667,-0.019958496,0.062438965,0.030319214,-0.024276733,-0.014038086,0.007980347,-0.013404846,0.012672424,-0.009521484,0.008117676,-0.04562378,0.03112793,0.07788086,-0.00039291382,-0.015586853,-0.010368347,-0.06384277,-0.03829956,-0.039764404,0.024230957,0.007381439,-0.009185791,0.038513184,-0.037231445,-0.0345459,-0.0032863617,0.020080566,0.014694214,0.06451416,0.017196655,-0.00198555,0.02508545,0.02067566,-0.057647705,0.034576416,0.041046143,0.0048675537,-0.039489746,-0.041625977,0.022735596,0.055419922,-0.01928711,0.018692017,-0.0050811768,0.023269653,-0.015991211,0.0022125244,0.019989014,-0.014823914,-0.026901245,-0.025482178,-0.025375366,0.025726318,0.007167816,-0.03665161,-0.025909424,-0.08081055,0.050933838,0.043182373,0.038360596,0.0067443848,0.0019607544,-0.014633179,-0.0044136047,-0.06829834,0.053649902,0.07092285,-0.0026550293,-0.011299133,0.030654907,-0.0032672882,-0.028381348,0.0066604614,-0.021240234,-0.035247803,-0.016159058,0.013313293,-0.048919678,-0.001452446,0.017913818,0.03161621,0.048065186,-0.005859375,-0.04714966,-0.019561768,-0.00932312,-0.0016641617,-0.027526855,-0.006919861,-0.008888245,0.0075416565,0.014175415,0.0051498413,0.005744934,0.0025844574,-0.0025081635,-0.00012743473,-0.0057411194,-0.009185791,-0.034698486,0.007843018,0.0033473969,-0.042144775,-0.002040863,-0.000834465,0.07519531,-0.041259766,0.035705566,-0.0070114136,0.009437561,0.044403076,-0.004878998,-0.035003662,0.011306763,0.021499634,0.0158844,0.039154053,0.01525116,-0.035736084,-0.0184021,0.07720947,-0.0013809204,-0.007167816,0.005882263,0.013702393,0.040771484,-0.0104522705,-0.05960083,-0.030700684,-0.008705139,-0.044006348,0.016189575,-0.029312134,0.03152466,-0.009223938,-0.0014076233,-0.023284912,0.0015563965,-0.02696228,0.0149002075,-0.015266418,-0.0021133423,-0.027038574,-0.01676941,0.024261475,0.010009766,-0.007282257,0.005054474,0.05065918,0.023010254,-0.0007238388,-0.031463623,-0.025299072,0.0018386841,-0.0016336441,0.016433716,0.014419556,0.018875122,0.045898438,-0.0357666,-0.000002682209,0.022598267,0.015670776,0.032470703,0.0011997223,0.009895325,-0.06341553,-0.045715332,-0.022857666,-0.040130615,0.021102905,0.006134033,-0.011054993,0.046875,0.00655365,-0.025527954,-0.037872314,0.01600647,-0.046325684,0.0032997131,0.04537964,-0.0154800415,-0.023773193,0.0073394775,-0.0074768066,0.005004883,0.03781128,0.008705139,0.04071045,0.06866455,0.045318604,0.013519287,0.016616821,0.00033450127,0.030441284,0.0040283203,-0.033569336,-0.0317688,-0.016921997,0.026260376,-0.022613525,-0.020355225,-0.07080078,0.045410156,0.045410156,0.09057617,0.0231781,0.0093688965,0.028152466,-0.01638794,0.021377563,-0.023727417,-0.013298035,-0.028045654,-0.047790527,0.023132324,-0.015350342,-0.0061035156,-0.021636963,0.03729248,-0.0014047623,0.021209717,-0.017333984,0.048461914,-0.017578125,-0.006816864,0.015640259,0.026168823,0.036468506,0.06652832,-0.040863037,0.035736084,0.038085938,-0.032684326,0.0058250427,0.040649414,-0.015014648,-0.0054779053,-0.047729492,-0.022140503,-0.010002136,-0.013000488,-0.059295654,0.017105103,0.011001587,0.020401001,0.014801025,-0.0022354126,-0.013298035,-0.0017576218,-0.011665344,-0.045013428,0.00024604797,-0.029571533,0.0020980835,0.043395996,-0.02456665,-0.0065841675,-0.0057792664,-0.010047913,0.0043907166,0.009552002,0.025985718,-0.0012588501,-0.04284668,0.027816772,0.012237549,0.015602112,0.008331299,0.029083252,0.018676758,0.034484863,0.055267334,0.01676941,-0.017303467,-0.06402588,0.01953125,-0.044525146,-0.004673004,0.022369385,-0.024032593,0.0029411316,-0.013832092,-0.02619934,-0.018035889,0.0087509155,-0.031097412,0.00009471178,0.014656067,-0.011512756,-0.024795532,-0.055145264,-0.029281616,0.00017809868,0.061676025,0.018005371,0.021957397,-0.07476807,0.004425049,0.02960205,0.010139465,0.0473938,-0.014129639,-0.005443573,-0.015571594,-0.035614014,-0.014717102,-0.019210815,0.022155762,-0.010513306,-0.007865906,0.032562256,0.0033988953,0.020523071,0.015945435,0.015014648,0.017684937,-0.027069092,-0.009338379,0.0014915466,0.04031372,0.006412506,-0.009925842,-0.04699707,0.040618896,0.006061554,0.0309906,-0.03793335,-0.010810852,-0.010536194,0.0018348694,0.01663208,-0.015327454,-0.01889038,-0.014007568,-0.04058838,-0.045074463,0.049194336,-0.025375366,0.032989502,0.02760315,0.006008148,0.01713562,-0.0017204285,-0.01235199,0.018295288,-0.031677246,-0.0061035156,-0.020980835,-0.027679443,-0.02015686,-0.015106201,-0.030944824,0.025497437,-0.027145386,0.02305603,0.009902954,-0.018112183,0.031219482,-0.005016327,0.0008187294,0.02394104,0.001958847,0.022003174,0.03302002,0.007282257,-0.04800415,0.018203735,-0.0068626404,0.011909485,-0.0101623535,0.037597656,0.027191162,-0.0030975342,-0.0023288727,-0.007736206,-0.023406982,-0.017181396,0.0014743805,0.004295349,0.007095337,-0.0045280457,-0.025802612,0.017425537,0.011764526,-0.03466797,-0.03552246,0.014678955,0.008583069,-0.028839111,0.022369385,0.037017822,0.04840088,-0.021362305,0.0043182373,0.007904053,0.025909424,0.0345459,0.009017944,-0.0074653625,0.016799927,-0.021194458,0.015548706,0.0035324097,-0.010009766,0.022857666,0.0053901672,0.02420044,0.03564453,0.011497498,-0.019592285,-0.044525146,0.0017442703,-0.013298035,-0.025283813,0.030349731,0.014823914,0.03286743,-0.024475098,0.021499634,0.014732361,-0.022613525,-0.014152527,-0.007801056,0.036224365,-0.0138168335,-0.016540527,0.015068054,0.018814087,0.03353882,-0.064331055,0.0008392334,-0.00095558167,0.020080566,-0.01902771,-0.037078857,-0.045532227,0.0137786865,0.042785645,0.010185242,0.025726318,0.035736084,-0.000156641,0.01259613,0.036712646,-0.01272583,-0.012466431,-0.015548706,-0.04840088,-0.033111572,-0.015045166,0.00016582012,-0.028793335,0.0113220215,-0.004135132,-0.026473999,0.0055732727,-0.012519836,-0.0028896332,-0.009140015,0.006958008,0.043426514,0.013412476,0.013710022,-0.008125305,-0.031951904,0.006816864,-0.00019276142,0.022033691,-0.044921875,0.02557373,-0.009475708,-0.0059661865,0.0022087097,0.010955811,0.018615723,0.028930664,0.014633179,0.043884277,-0.04660034,0.050445557,-0.03741455,0.015625,-0.0010910034,-0.037078857,-0.0134887695,-0.020828247,-0.01777649,0.040771484,-0.029937744,-0.015975952,-0.029830933,-0.031585693,-0.011947632,-0.05734253,0.010017395,0.036315918,0.029830933,-0.026016235,0.0112838745,-0.004295349,0.009689331,-0.016143799,0.0018367767,-0.01663208,0.01727295,0.019836426,-0.0004556179,-0.02809143,-0.022064209,-0.024871826,0.0002822876,-0.0418396,-0.050720215,-0.0096206665,0.0056266785,-0.0053749084,-0.0138549805,-0.028015137,-0.029830933,-0.001739502,-0.035888672,0.012435913,0.005760193,0.019485474,-0.002313614,-0.024841309,0.0067710876,0.01737976,-0.0075149536,0.03756714,0.009185791,-0.002275467,-0.039367676,0.018035889,0.013160706,0.018341064,0.0025100708,-0.01626587,-0.015853882,-0.0154800415,-0.05871582,-0.012489319,-0.0038223267,-0.018554688,-0.010360718,0.008239746,-0.052459717,-0.0007457733,-0.013366699,0.007270813,0.028793335,0.009643555,0.021072388,-0.0028266907,0.018493652,-0.011123657,-0.0074691772,-0.031341553,0.022232056,0.010322571,-0.0016021729,0.02532959,0.05065918,-0.0003578663,-0.018234253,0.012336731,0.012565613,0.009773254,-0.01977539,0.01701355,-0.015182495,0.0113220215,-0.009346008,-0.015014648,-0.044281006,-0.00724411,0.08544922,-0.006450653,-0.016479492,-0.013465881,-0.012962341,0.016845703,0.036224365,-0.033325195,-0.0019416809,-0.025222778,0.02067566,-0.020065308,0.014846802,0.0065994263,0.01651001,-0.01902771,-0.052978516,-0.02154541,-0.0109939575,-0.019104004,-0.0635376,-0.02532959,-0.065979004,0.0007019043,-0.008071899,-0.026641846,-0.00217247,0.010131836,-0.013710022,-0.08288574,-0.0034542084,0.04385376,0.011360168,0.03036499,-0.004283905,0.025604248,0.036071777,-0.03387451,0.00068330765,0.037719727,-0.02859497,-0.01222229,-0.016326904,0.014373779,-0.012260437,-0.02470398,0.010246277,0.015914917,0.023803711,-0.0068359375,0.006385803,-0.01133728,0.017211914,-0.021148682,0.026885986,-0.019454956,-0.009567261,0.038909912,-0.039794922,0.019638062,0.010688782,-0.008720398,-0.0030460358,0.032318115,0.0423584,-0.03112793,-0.019317627,0.019012451,0.0075035095,0.039123535,-0.017822266,0.043884277,0.020950317,-0.019378662,0.016983032,-0.00724411,-0.013336182,-0.028900146,-0.02583313,0.02456665,-0.008049011,0.013710022,-0.023742676,0.01058197,0.016113281,0.003627777,0.01626587,-0.009017944,-0.0262146,-0.02607727,-0.00020492077,0.0046920776,0.0021762848,-0.0009794235,0.019897461,0.017913818,0.040374756,0.01763916,-0.014762878,0.006477356,0.025039673,-0.009094238,0.0034885406,0.027008057,-0.0029392242,0.016204834,0.01940918,0.02128601,-0.05114746,-0.017608643,-0.02128601,-0.022598267,-0.0074310303,-0.007972717,-0.012756348,-0.010307312,0.0057678223,-0.010032654,-0.031799316,-0.00034427643,-0.023910522,-0.035095215,-0.0027713776,-0.024673462,0.023635864,0.003835678,0.009811401,0.017700195,-0.0110321045,0.038970947,-0.005393982,-0.018615723,0.027374268,0.026138306,0.01763916,-0.0335083,-0.011161804,-0.018615723,-0.009056091,0.0037002563,-0.03086853,0.0076522827,0.046844482,-0.014450073,-0.0016479492,0.0018596649,0.022735596,-0.0071144104,0.013122559,-0.016677856,0.018203735,-0.009590149,0.03753662,-0.043792725,0.026733398,0.017196655,0.0045661926,-0.010345459,-0.00045323372,-0.030654907,0.015670776,0.0042762756,-0.02470398,0.060791016,0.013130188,0.031280518,-0.019638062,-0.012680054,0.007255554,-0.026351929,-0.025909424,0.025100708,-0.0035896301,0.009353638,0.013336182,-0.03164673,0.037322998,-0.03665161,0.012466431,-0.00059223175,0.008071899,-0.001830101,-0.029647827,-0.0071258545,-0.012161255,-0.017166138,0.0061416626,0.0033950806,0.05303955,0.0158844,0.030166626,0.056518555,0.017471313,0.00712204,-0.032958984,-0.030288696,0.00844574,-0.0115737915,0.016586304,-0.01626587,0.05960083,0.04171753,0.0048675537,0.046447754,0.02935791,0.035308838,0.0010662079,0.0028305054,-0.026519775,0.014129639,0.0038089752,0.026748657,0.00233078,0.033081055,-0.02909851,0.02243042,0.010177612,0.029525757,-0.038269043,0.031036377,0.07080078,0.015777588,-0.01260376,0.038757324,-0.004337311,-0.009666443,-0.014640808,-0.019714355,0.056762695,-0.00068330765,0.05255127,0.056030273,0.019470215,0.01083374,0.023498535,-0.026809692,-0.012123108,0.062683105,0.019836426,-0.02293396,-0.012275696,-0.012954712,0.008644104,-0.041625977,-0.02861023,0.016662598,-0.010322571,0.0071487427,-0.0005054474,-0.005256653,-0.010414124,0.016586304,0.020935059,0.009719849,-0.009918213,0.02319336,0.035888672,-0.000053465366,0.023635864,-0.010223389,0.029266357,-0.02444458,-0.02015686,0.021331787,0.02217102,-0.010604858,-0.009155273,0.024658203,-0.00022315979,0.036102295,0.047698975,-0.029159546,0.008125305,0.03161621,0.008041382,-0.0032596588,0.053497314,0.041656494,0.015220642,0.04385376,0.033355713,0.036712646,-0.042053223,0.028945923,-0.0027866364,-0.0049552917,-0.012969971,-0.005428314,0.0024795532,-0.010406494,0.015777588,0.0009031296,-0.020812988,0.024917603,0.031311035,-0.003189087,0.00041103363,-0.008598328,0.008506775,-0.02949524,-0.000726223,0.0075035095,-0.015899658,0.042022705,0.020324707,0.027267456,-0.027893066,0.024307251,0.0013141632,-0.009498596,0.00070524216,0.027236938,-0.029876709,0.008003235,-0.006816864,0.005634308,-0.061309814,0.0043945312,0.024749756,-0.012138367,0.018447876,0.012336731,-0.008918762,-0.0029506683,0.022872925,0.014732361,-0.0021800995,-0.013031006,-0.02609253,0.036102295,0.04598999,0.0005893707,0.002796173,-0.024765015,-0.0060691833,0.006385803,-0.0027866364,-0.012054443,-0.00945282,-0.014419556,-0.020401001,0.016921997,0.03326416,0.021850586,0.060180664,-0.016708374,-0.009307861,0.00233078,0.034362793,0.01084137,0.00017118454,0.007549286,0.008583069,-0.014511108,0.04574585,0.028045654,0.014564514,0.03503418,-0.007205963,-0.015914917,0.0045776367,-0.01272583,0.015029907,-0.013702393,0.0027828217,-0.0060653687,0.026931763,-0.016952515,-0.037231445,0.012680054,-0.016860962,-0.02458191,-0.01725769,0.011405945,0.0049057007,0.03253174,0.04031372,0.028640747,-0.013084412,0.06011963,-0.020828247,0.046783447,0.00724411,-0.014839172,0.05319214,0.020355225,0.041809082,0.012031555,0.015975952,-0.040008545,0.020584106,0.03866577,0.024902344,0.013313293,0.0036640167,-0.017318726,0.036834717,-0.003501892,0.028686523,-0.017837524,0.0054740906,0.02255249,-0.0027484894,-0.006778717,-0.0069351196,-0.0016107559,0.00504303,0.047088623,-0.033081055,-0.009269714,-0.02861023,-0.016113281,0.0206604,-0.026809692,0.00919342,0.0033416748,-0.019546509,0.016708374,-0.026855469,-0.030441284,-0.0018930435,0.027069092,-0.049072266,-0.021636963,0.0014333725,0.017822266,-0.01828003,0.03137207,0.012306213,0.00030875206,0.007801056,0.04034424,-0.010986328,0.034240723,-0.013450623,0.020812988,0.023757935,0.0061836243,-0.019470215,-0.0023784637,0.0071144104,-0.009986877,0.015991211,0.043762207,-0.01940918,0.01108551,-0.0101623535,-0.004802704,0.0011882782,0.0039978027,-0.011627197,0.01890564,-0.0060195923,-0.009773254,-0.0035705566,0.0031833649,-0.008338928,0.0033111572,-0.006668091,-0.019943237,0.002527237,0.033569336,0.0154953,-0.035095215,-0.0036315918,0.010932922,0.01525116,-0.015914917,-0.010940552,-0.008773804,-0.03652954,0.013137817,0.010604858,0.013069153,0.015029907,-0.019973755,-0.00409317,0.023254395,0.013122559,0.01727295,0.00069379807,-0.004299164,0.018249512,-0.008476257,-0.0047416687,-0.0029125214,-0.014305115,0.015457153,0.023010254,-0.00045275688,-0.024261475,0.021987915,-0.01638794,0.018234253,0.005935669,-0.016525269,0.009674072,-0.0129852295,-0.0054359436,0.007820129,0.007701874,-0.012939453,-0.008293152,-0.012519836,0.031677246,0.059539795,-0.011917114,-0.006462097,0.030548096,0.011688232,0.020721436,0.037200928,0.007019043,0.037872314,0.02998352,-0.015510559,-0.024291992,0.022506714,-0.0138549805,-0.019973755,0.016723633,-0.010391235,-0.025619507,0.019210815,0.015235901,0.0023021698,-0.027755737,-0.0058021545,-0.0030899048,-0.014930725,0.016204834,-0.015586853,0.012207031,-0.027114868,-0.009422302,0.0065689087,-0.032592773,-0.04727173,-0.025985718,-0.0024547577,-0.000626564,-0.048553467,0.0015172958,-0.031829834,0.013313293,-0.031311035,-0.0040016174,-0.010032654,0.009017944,-0.01776123,-0.009017944,0.0020217896,0.030029297,0.020477295,0.009239197,0.024230957,-0.028945923,-0.023803711,-0.026809692,0.010002136,-0.013366699,0.011650085,0.0028038025,0.03225708,0.026443481,-0.013214111,-0.009605408,-0.009307861,-0.008041382,-0.020950317,-0.01940918,-0.021972656,0.020401001,0.014839172,-0.0066566467,-0.022445679,0.044525146,-0.030761719,-0.014671326,0.035217285,0.043670654,0.008834839,0.031951904,-0.024505615,-0.003604889,-0.012268066,0.00013375282,-0.01576233,0.008056641,0.0029659271,0.015304565,-0.0065231323,0.00091934204,0.018966675,-0.008514404,-0.0027942657,0.026062012,0.006542206,-0.0038776398,0.03567505,0.0036373138,0.0020523071,-0.018157959,-0.004638672,0.024307251,0.043701172,0.012321472,0.0050811768,-0.012580872,0.0024528503,-0.016403198,0.012329102,0.00818634,-0.015640259,-0.046691895,-0.020568848,-0.029464722,0.01512146,0.0022144318,0.015586853,-0.0037384033,0.023422241,-0.01586914,-0.021408081,-0.031829834,0.0335083,0.0077590942,-0.016082764,-0.015571594,0.015472412,0.009780884,-0.040039062,0.005630493,-0.038116455,-0.030654907,0.004501343,-0.024719238,0.025741577,0.0031051636,-0.002243042,-0.002653122,-0.014373779,-0.0029411316,0.0065994263,0.030426025,-0.012207031,-0.009986877,0.030685425,0.023391724,-0.013031006,0.02357483,-0.0059814453,0.0049934387,0.019165039,-0.01638794,0.011695862,-0.020431519,0.029800415,-0.009529114,-0.0026760101,0.029052734,-0.005580902,0.006515503,-0.040618896,0.0039367676,0.0017089844,-0.0076904297,0.040252686,-0.03579712,-0.024383545,0.0132369995,-0.024139404,-0.027832031,0.00655365,0.014602661,0.026672363,-0.008346558,0.052215576,-0.009521484,-0.00969696,0.020889282,0.009391785,-0.022018433,0.000426054,0.027526855,-0.0012569427,0.000115692616,-0.0027236938,-0.014320374,-0.038757324,-0.009300232,0.015670776,-0.0064086914,-0.0073165894,0.02532959,0.021972656,0.048034668,-0.006881714,0.018966675,0.007270813,0.010391235,0.024963379,0.006210327,0.05795288,0.00012886524,-0.017944336,0.008094788,-0.00009137392,-0.02130127,0.00522995,0.0032749176,-0.0037517548,-0.035949707,0.0128479,0.002380371,0.02444458,-0.027832031,0.015838623,-0.02180481,-0.013557434,-0.0345459,-0.0076522827,-0.025939941,0.010246277,0.030212402,0.0018787384,0.02848816,0.0012645721,-0.02218628,0.017074585,0.04714966,-0.0104904175,-0.029876709,-0.0105896,0.0058021545,0.0010566711,0.013832092,0.010116577,-0.016540527,-0.011779785,0.012481689,-0.02053833,0.006919861,-0.0022697449,0.016967773,-0.0041160583,-0.004184723,-0.013442993,0.026748657,-0.008018494,-0.0078125,0.009269714,0.0033035278,0.032684326,0.027145386,-0.008308411,0.019104004,0.021484375,-0.038024902,0.06109619,0.0012359619,0.022918701,-0.022247314,0.0013141632,-0.03967285,-0.024291992,-0.012207031,0.008895874],"createdAt":"2026-04-18T19:26:29.468Z","updatedAt":"2026-04-23T09:31:44.693Z","lastSeenAt":"2026-04-23T09:31:44.693Z","tsv":"'/api/v1/transactions/38':56,158 '/request':13,28,150 '0.02':12,27,65,149 '000':69 '20':68 '402 payment API' '6':75 'Base network API' 'USDC API' 'accept':46 'access':62,180 'actual':215 'advertis':104,167 'ai':116 'analysi':120 'analyt':110 'api':5,20,38,61,78,106,168,179,196 'base':8,23,51,70 'behavior':216 'broader':102 'call':4,19,67 'categori':107,169 'classif':123 'clear':161 'connect':202 'contain':97 'content':208 'convers':140 'cost':64 'data':109,113,187 'decim':76 'descript':175 'doc':193 'document':184,210 'embed':124 'endpoint':55,143,156,219 'estim':134 'exampl':212 'exchang':129 'export':114 'feed':128 'financ':125 'function':189 'gas':133 'generat':141 'geocod':138 'header':96 'howev':153 'includ':108 'individu':90 'infrastructur':136 'insight':115 'json-response' 'key':79 'land':172 'learn':118 'limit':81 'list':58,145 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':117 'map':162 'metric':111 'micropayment API' 'multipl':105 'network':9,24,52 'no-api-key' 'page':173,197 'paid':89 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,95,100 'per':3,18,36,66 'platform':6,21,39,103 'point':152 'post-method' 'premium':60,178 'price':127,151,194 'probe':157 'prompt':204 'protocol':44 'quot':132 'rate':80,130 'report':112 'request':37,87 'requir':85 'respons':213 'return':191,199 'sentiment':119 'sign':99 'simpli':177 'specif':54,155 'subscript':83 'substant':207 'summar':122 'text':121 'token':131 'unit':71 'unknown':221 'usdc':15,30,47,73 'usdc-base-network' 'use':41 'util':137 'valid':139 'via':10,25,91 'wallet':203 'web3':126 'without':209 'x':94 'x-payment':93 'x402':11,26,43 'x402 API' 'x402-payment'","prices":[{"id":"d82d6ce8-87ff-433a-8cc3-0a2db62df533","listingId":"f5f1a072-da9f-4ad8-9c27-291623945038","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:29.468Z"}],"sources":[{"listingId":"f5f1a072-da9f-4ad8-9c27-291623945038","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/38","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:29.468Z","lastSeenAt":"2026-04-23T09:31:44.693Z"}],"details":{"listingId":"f5f1a072-da9f-4ad8-9c27-291623945038","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/38 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/38"},{"claim":"All listed APIs are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a pay-per-request API without needing API keys or subscriptions","Agent-driven workflows that settle per-call costs in USDC on Base","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers exploring x402 payment protocol integrations","Agents that need keyless, pay-as-you-go API access","Low-cost per-request API consumption settled on-chain"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet","Production workloads requiring well-documented response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.76Z"},"updatedAt":"2026-04-23T09:31:44.693Z"}}