{"id":"75eed82a-f2fc-4c1c-8b1b-34aa477cefd8","shortId":"JDWQZa","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/151` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request.\n\nThe specific functionality behind `/api/v1/transactions/151` is not documented beyond the label \"Premium API Access.\" The docs, pricing, and API pages all resolve to a minimal \"Connect wallet\" prompt with no further technical documentation, OpenAPI schema, or example payloads. The endpoint accepts POST requests and returns `application/json`, but the request body schema and response structure are unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","finance"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","micropayment API","USDC pay-per-call","Base network API","premium API access"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The specific functionality of /api/v1/transactions/151 ('Premium API Access') is completely undocumented; it is unclear what data or service it provides.","No OpenAPI schema or example request/response payloads are available.","The broader platform lists many endpoints (AI, analytics, finance, utils) but none have documented schemas or usage examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/151","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty stubs ('Connect wallet' only). The actual functionality behind 'Premium API Access' at /api/v1/transactions/151 is undocumented, making this 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":"2026-04-19T12:15:29.179Z","embedding":[-0.029129028,-0.040893555,0.040740967,0.019989014,0.01626587,-0.025100708,-0.02999878,0.021942139,0.07159424,-0.06488037,0.018676758,-0.03793335,-0.04232788,-0.029953003,-0.023483276,0.0078125,0.0021800995,0.004131317,-0.038604736,0.028671265,0.027542114,-0.017211914,-0.034210205,0.025405884,0.0050964355,-0.0085372925,-0.0093307495,-0.013557434,-0.023101807,-0.04486084,0.04498291,-0.02494812,-0.002363205,0.007873535,-0.016082764,-0.009056091,-0.003768921,0.029052734,0.030899048,-0.0036735535,0.0027370453,-0.060913086,0.006526947,-0.021240234,-0.05456543,0.00095558167,0.0073509216,-0.026504517,0.00818634,0.0004954338,-0.03652954,-0.016296387,-0.009521484,0.012229919,0.012573242,0.0030727386,0.0044136047,-0.0104599,0.0143585205,0.021591187,-0.021835327,-0.0657959,-0.017730713,-0.0013418198,0.0015459061,0.05380249,-0.012542725,0.036590576,0.010032654,0.0692749,0.032043457,0.046875,0.030899048,0.015823364,0.0013885498,-0.004295349,0.00031900406,0.061157227,-0.011367798,-0.028457642,-0.0034503937,-0.008956909,-0.05380249,0.005558014,-0.015075684,-0.035491943,-0.016815186,0.019897461,-0.020721436,0.023498535,-0.08178711,0.0013637543,-0.0033416748,-0.0011558533,-0.0017871857,-0.0025463104,-0.010932922,0.024887085,-0.007904053,0.00774765,0.0033435822,-0.04446411,0.023666382,0.0069618225,0.027313232,0.04345703,0.02027893,0.024230957,0.011306763,0.0014638901,-0.0262146,0.021636963,-0.0013532639,-0.0077285767,0.018417358,-0.003145218,-0.011581421,0.010978699,-0.02368164,0.02909851,-0.050811768,0.052490234,0.005443573,-0.00083208084,-0.0015926361,-0.048431396,-0.009590149,0.026016235,-0.025817871,-0.0002156496,0.022445679,0.015899658,0.028182983,-0.015174866,-0.030563354,0.022125244,-0.020629883,-0.012237549,-0.048431396,-0.028289795,0.041229248,-0.03149414,0.017349243,0.04675293,-0.10076904,-0.0077285767,-0.0413208,0.008880615,-0.028366089,-0.0036315918,-0.005393982,0.025009155,-0.017150879,-0.015609741,-0.021713257,-0.02999878,0.004421234,0.043945312,-0.02003479,0.04373169,-0.025558472,0.017105103,0.02168274,0.0059547424,0.021148682,0.02116394,0.00084257126,-0.06945801,-0.08526611,-0.011703491,-0.0029754639,-0.024719238,-0.035736084,0.013221741,-0.007461548,-0.08001709,-0.030334473,-0.023025513,-0.003452301,-0.041412354,-0.0041923523,-0.030380249,0.02079773,-0.007858276,-0.06738281,-0.026397705,-0.035736084,0.067993164,0.03463745,0.02494812,0.02168274,-0.019332886,0.052886963,0.025787354,-0.015396118,-0.019592285,0.022964478,-0.021011353,0.017227173,-0.006351471,0.0135650635,-0.03387451,0.031585693,0.08331299,-0.003982544,-0.027267456,-0.008026123,-0.061279297,-0.04421997,-0.031921387,0.01739502,0.016067505,-0.0028820038,0.033477783,-0.03363037,-0.03060913,0.007888794,0.010215759,0.018417358,0.06298828,0.007858276,-0.017532349,0.04296875,0.0129776,-0.050994873,0.03387451,0.039276123,0.008361816,-0.029327393,-0.042541504,0.02407837,0.04421997,-0.022567749,0.0129776,-0.01689148,0.03186035,-0.011253357,0.0043640137,0.020263672,-0.014541626,-0.025680542,-0.026428223,-0.0154953,0.02760315,0.015342712,-0.031219482,-0.03677368,-0.086364746,0.04360962,0.04232788,0.035980225,-0.004421234,-0.00077819824,-0.0154953,-0.00655365,-0.06640625,0.063964844,0.06719971,0.0048561096,0.0016498566,0.035369873,-0.0129776,-0.034973145,0.009635925,-0.021774292,-0.03262329,-0.021636963,0.011367798,-0.043914795,0.00006181002,0.017578125,0.022949219,0.050476074,-0.0056419373,-0.0519104,-0.018798828,-0.004432678,0.0016088486,-0.02658081,-0.0020751953,-0.00056123734,0.014434814,0.010414124,0.0021648407,0.01675415,0.0024318695,-0.00630188,-0.0023403168,0.008026123,-0.01751709,-0.037200928,0.02053833,-0.007511139,-0.056427002,0.0056991577,-0.0037250519,0.06427002,-0.05130005,0.04321289,-0.02218628,0.013122559,0.058166504,-0.0057411194,-0.054107666,0.012077332,0.024154663,0.015823364,0.044708252,0.018325806,-0.035339355,-0.013145447,0.071899414,-0.0003862381,-0.000834465,0.013763428,0.014091492,0.035095215,-0.009414673,-0.06628418,-0.033996582,-0.0053749084,-0.036254883,0.019622803,-0.027908325,0.03793335,-0.022125244,0.005748749,-0.023117065,-0.0032901764,-0.039276123,0.009414673,-0.0098724365,0.00762558,-0.03074646,-0.021026611,0.021240234,0.004787445,-0.023132324,0.0063438416,0.048919678,0.027908325,-0.0051612854,-0.031585693,-0.029891968,-0.0034618378,-0.0012302399,0.018234253,0.017242432,0.022994995,0.04751587,-0.0385437,0.002412796,0.020401001,0.017944336,0.03012085,-0.009208679,0.012168884,-0.07342529,-0.0513916,-0.02053833,-0.042633057,0.03253174,0.020507812,-0.0039901733,0.06097412,0.019897461,-0.017593384,-0.033233643,0.019104004,-0.04586792,-0.001540184,0.040496826,-0.018844604,-0.024154663,0.009086609,-0.003276825,0.0020446777,0.033081055,0.021499634,0.040100098,0.070495605,0.050109863,0.017288208,0.03086853,-0.0052719116,0.02973938,0.0065841675,-0.02230835,-0.031677246,-0.023803711,0.029953003,-0.024505615,-0.016220093,-0.068237305,0.05126953,0.042297363,0.09832764,0.025802612,0.00030112267,0.028823853,-0.010124207,0.020980835,-0.017868042,-0.028030396,-0.027389526,-0.044952393,0.01789856,-0.010345459,-0.005290985,-0.019226074,0.024902344,0.0021839142,0.018112183,-0.024276733,0.053863525,-0.008140564,-0.01876831,0.018844604,0.009521484,0.051086426,0.059936523,-0.03640747,0.032440186,0.02609253,-0.024780273,0.008399963,0.035369873,-0.009506226,-0.0053634644,-0.04058838,-0.021972656,-0.016433716,-0.0063095093,-0.043640137,0.0070266724,0.012397766,0.030685425,0.019958496,-0.003047943,-0.017364502,-0.0012807846,-0.018447876,-0.04147339,0.0029067993,-0.027389526,-0.005016327,0.046722412,-0.023239136,-0.008705139,0.00043010712,0.0024089813,0.008323669,0.0076904297,0.018173218,-0.0048942566,-0.040771484,0.0211792,0.0062675476,0.016571045,0.012687683,0.025466919,0.019515991,0.042663574,0.050201416,0.012756348,-0.00995636,-0.06512451,0.011528015,-0.048950195,-0.0023612976,0.028381348,-0.021697998,-0.002084732,-0.00819397,-0.024978638,-0.0234375,0.01576233,-0.027770996,0.004207611,0.02331543,-0.0099487305,-0.027313232,-0.059753418,-0.021896362,-0.004261017,0.060699463,0.026550293,0.020904541,-0.06304932,-0.0010414124,0.033050537,0.01373291,0.035614014,-0.013801575,-0.0040664673,-0.015960693,-0.03427124,-0.011871338,-0.019897461,0.023345947,0.0008430481,-0.0058631897,0.019119263,0.0103302,0.028030396,0.008285522,0.010063171,0.022964478,-0.0211792,-0.004295349,-0.006778717,0.03955078,0.01979065,-0.019256592,-0.0513916,0.042175293,0.0063476562,0.028564453,-0.047668457,-0.0124435425,-0.010787964,0.0069236755,0.009857178,-0.011962891,-0.0053520203,-0.013168335,-0.049743652,-0.0703125,0.050933838,-0.020950317,0.023086548,0.026504517,0.007724762,0.026748657,-0.00522995,-0.005584717,0.017608643,-0.023925781,-0.010231018,-0.018005371,-0.027999878,-0.020950317,-0.0141067505,-0.01966858,0.019836426,-0.024139404,0.015670776,0.0044288635,-0.022155762,0.031921387,-0.0115356445,0.00023257732,0.018173218,-0.0018939972,0.026550293,0.032287598,0.008354187,-0.037963867,0.015167236,0.0018815994,0.008399963,-0.004020691,0.04647827,0.024795532,-0.0036449432,-0.007019043,-0.0101623535,-0.020095825,-0.024383545,0.0013303757,0.009170532,0.0090408325,0.00010681152,-0.04309082,0.013198853,0.0062408447,-0.039642334,-0.02885437,0.018432617,0.012413025,-0.03778076,0.020858765,0.035949707,0.052642822,-0.017288208,0.00047278404,-0.0048332214,0.03125,0.033416748,0.015357971,-0.009094238,0.026062012,-0.004196167,0.017318726,-0.003753662,-0.013954163,0.012771606,0.0008416176,0.024215698,0.021484375,0.0058517456,-0.020324707,-0.035736084,0.002998352,-0.015357971,-0.025177002,0.026123047,0.017593384,0.03616333,-0.019119263,0.012054443,0.015609741,-0.017730713,-0.012779236,-0.015670776,0.03488159,-0.012687683,-0.010398865,0.018707275,0.010665894,0.030639648,-0.058502197,-0.003955841,0.001613617,0.00705719,-0.020324707,-0.048919678,-0.03717041,0.0082473755,0.035888672,0.009338379,0.021438599,0.03564453,0.007820129,0.0109939575,0.034210205,-0.0039634705,-0.008605957,-0.006893158,-0.051574707,-0.028305054,-0.018127441,0.0075683594,-0.03213501,0.018173218,-0.0011177063,-0.026428223,0.005153656,-0.017150879,0.004055023,-0.018035889,0.007724762,0.042175293,0.005443573,0.014152527,-0.011627197,-0.039031982,0.0058250427,0.01209259,0.013916016,-0.041229248,0.023773193,-0.011955261,-0.0071792603,0.0012464523,0.01651001,0.020019531,0.027160645,0.0113220215,0.034088135,-0.03567505,0.043182373,-0.034057617,0.01625061,-0.0012369156,-0.036499023,-0.013999939,-0.018371582,-0.016586304,0.04333496,-0.024719238,-0.004634857,-0.034179688,-0.028442383,-0.011726379,-0.055358887,0.009941101,0.037139893,0.037384033,-0.025314331,0.0057411194,-0.008102417,0.0112838745,-0.01335144,0.010787964,-0.019210815,0.028030396,0.02078247,0.00623703,-0.032836914,-0.027999878,-0.024414062,-0.0065612793,-0.043823242,-0.049438477,-0.009849548,0.0015363693,-0.0079422,-0.011329651,-0.025482178,-0.029968262,-0.0037841797,-0.040405273,0.0087890625,0.004573822,0.019897461,-0.00025200844,-0.021331787,-0.002166748,0.011711121,-0.013336182,0.03741455,0.01171875,-0.00087690353,-0.047851562,0.012580872,0.016311646,0.025253296,-0.009132385,-0.023880005,-0.007926941,-0.019897461,-0.059692383,-0.006084442,-0.012794495,-0.021102905,-0.014152527,0.0008225441,-0.056762695,-0.0007815361,-0.023071289,0.009094238,0.027618408,0.0082473755,0.015090942,-0.0020656586,0.018569946,-0.007659912,-0.007686615,-0.034942627,0.016860962,0.010017395,0.0065193176,0.025497437,0.05407715,-0.0046958923,-0.029205322,0.008163452,0.0018959045,0.01676941,-0.024749756,0.008575439,-0.014587402,0.0050201416,-0.014625549,-0.012634277,-0.04058838,-0.006072998,0.08557129,-0.0010881424,-0.017074585,-0.0158844,-0.01966858,0.017532349,0.031097412,-0.035217285,-0.008644104,-0.023666382,0.015625,-0.025680542,0.012382507,0.00011485815,0.0234375,-0.015975952,-0.059631348,-0.021560669,-0.0076141357,-0.015563965,-0.053497314,-0.03540039,-0.06573486,0.008903503,-0.010032654,-0.021697998,0.006427765,0.009185791,-0.012413025,-0.07647705,-0.0024719238,0.053100586,0.008766174,0.030639648,-0.013252258,0.024887085,0.028060913,-0.03390503,-0.002439499,0.02633667,-0.033599854,-0.008125305,-0.021209717,0.013298035,-0.016738892,-0.01259613,0.016601562,0.005821228,0.015792847,-0.009361267,0.012107849,-0.010055542,0.022354126,-0.019714355,0.022888184,-0.017852783,-0.010734558,0.03729248,-0.03955078,0.024307251,0.008018494,-0.01386261,-0.0019369125,0.034362793,0.045715332,-0.036010742,-0.011413574,0.018737793,0.012786865,0.03353882,-0.02029419,0.04623413,0.015823364,-0.0143585205,0.01676941,-0.013404846,-0.018341064,-0.018295288,-0.026901245,0.01991272,-0.009521484,0.012542725,-0.019897461,0.00043964386,0.01486969,0.0066108704,0.008056641,-0.005241394,-0.02746582,-0.025604248,0.0009756088,0.0008225441,-0.0014677048,-0.0013198853,0.027267456,0.025054932,0.038146973,0.017547607,-0.022354126,0.01109314,0.030227661,-0.01121521,0.0028820038,0.026931763,-0.003036499,0.0151901245,0.023422241,0.02217102,-0.04748535,-0.018295288,-0.014564514,-0.01725769,0.0005841255,-0.0023498535,-0.019012451,-0.0061416626,0.0069618225,-0.011367798,-0.031341553,0.004055023,-0.020446777,-0.035095215,-0.0010232925,-0.018600464,0.024780273,0.008003235,0.00932312,0.004535675,-0.009750366,0.03704834,-0.0071983337,-0.019515991,0.035888672,0.024932861,0.016098022,-0.03414917,-0.0073509216,-0.015357971,-0.013961792,0.0013923645,-0.03729248,0.0073394775,0.043304443,-0.01878357,-0.0019035339,0.004890442,0.019714355,-0.002254486,0.00894928,-0.012626648,0.01687622,-0.0099487305,0.033569336,-0.042419434,0.024810791,0.007545471,0.004764557,-0.018341064,-0.014282227,-0.028900146,0.021652222,0.00724411,-0.008430481,0.05178833,0.011230469,0.028213501,-0.020385742,-0.024841309,0.0065727234,-0.028823853,-0.020980835,0.01966858,-0.006462097,-0.0005927086,0.015602112,-0.023757935,0.034118652,-0.031982422,0.016220093,-0.003479004,0.009124756,-0.0045776367,-0.018798828,-0.009674072,-0.007511139,-0.011962891,0.007843018,-0.0075263977,0.047180176,0.020217896,0.029968262,0.047821045,0.022354126,0.0013418198,-0.03842163,-0.028625488,0.01448822,-0.01084137,0.021240234,-0.016830444,0.062805176,0.03805542,0.0020389557,0.041534424,0.028701782,0.039093018,0.008460999,0.0040397644,-0.020858765,0.020446777,0.0007839203,0.030822754,-0.004108429,0.03250122,-0.02909851,0.02696228,0.008369446,0.023986816,-0.028442383,0.037139893,0.066833496,0.020050049,-0.015289307,0.042144775,-0.0036411285,-0.008781433,-0.009407043,-0.020935059,0.050231934,0.004878998,0.04727173,0.050628662,0.020874023,0.0025177002,0.029006958,-0.021026611,-0.026260376,0.06341553,0.03314209,-0.025634766,-0.009521484,-0.0071792603,0.01109314,-0.0473938,-0.028152466,0.016235352,-0.014190674,0.015670776,-0.0017442703,-0.0018424988,-0.005973816,0.011817932,0.0209198,0.01285553,-0.00844574,0.026733398,0.03677368,-0.0021247864,0.024093628,-0.0030460358,0.020309448,-0.01826477,-0.01600647,0.019195557,0.027160645,-0.010757446,-0.010803223,0.027282715,0.0006098747,0.035461426,0.050109863,-0.021362305,0.009529114,0.03253174,0.012397766,-0.0026893616,0.055755615,0.03869629,0.014205933,0.039520264,0.028137207,0.035614014,-0.033691406,0.022079468,-0.003862381,0.0020561218,-0.011856079,-0.005104065,0.0071983337,-0.017501831,0.017410278,0.0048103333,-0.019454956,0.022064209,0.023376465,-0.0006585121,-0.004878998,-0.0047340393,0.013504028,-0.020248413,-0.0015630722,0.010635376,-0.015525818,0.040893555,0.010421753,0.025497437,-0.02420044,0.022064209,0.00015127659,-0.012794495,-0.0046463013,0.024932861,-0.03778076,0.0069999695,-0.003698349,0.0072517395,-0.058929443,0.00274086,0.028182983,-0.017807007,0.0234375,0.016342163,-0.0047683716,-0.006504059,0.030227661,0.0075187683,0.0014505386,-0.014091492,-0.022491455,0.037353516,0.041809082,0.0017375946,0.0012083054,-0.024765015,-0.0027046204,0.0057678223,-0.0019340515,-0.007217407,-0.006389618,-0.012428284,-0.02583313,0.019088745,0.03387451,0.021865845,0.056762695,-0.021118164,-0.010261536,0.0069236755,0.040527344,0.0038032532,-0.0028762817,0.0036125183,0.018432617,-0.01424408,0.048583984,0.03918457,0.0074882507,0.038757324,0.0014772415,-0.016998291,0.0068473816,-0.010726929,0.023727417,-0.010597229,0.0046920776,-0.0048713684,0.031097412,-0.01184082,-0.040985107,0.006816864,-0.01939392,-0.02067566,-0.012199402,0.009635925,0.006839752,0.02420044,0.03765869,0.019485474,-0.0143966675,0.057861328,-0.011070251,0.039978027,0.0067329407,-0.009246826,0.05505371,0.015823364,0.036193848,0.016113281,0.019973755,-0.032440186,0.021072388,0.028060913,0.020584106,0.01802063,0.009391785,-0.00762558,0.03262329,-0.0012693405,0.03353882,-0.011772156,-0.0010566711,0.019577026,-0.0046195984,-0.002702713,-0.009674072,-0.00844574,0.011802673,0.052093506,-0.029769897,-0.0076065063,-0.027923584,-0.00869751,0.022109985,-0.011367798,-0.0015830994,-0.004219055,-0.016830444,0.021316528,-0.017669678,-0.025344849,0.012229919,0.023025513,-0.05441284,-0.011634827,0.0030841827,0.01763916,-0.018096924,0.02961731,0.016601562,0.0043754578,0.01108551,0.0418396,-0.008377075,0.03338623,-0.0064048767,0.029022217,0.02798462,0.0044136047,-0.024047852,-0.0009069443,0.004764557,-0.013839722,0.016601562,0.039123535,-0.018585205,0.0033435822,-0.011985779,-0.00004285574,-0.0017185211,0.012939453,-0.013938904,0.012298584,-0.013618469,-0.016220093,0.00094366074,0.0065994263,-0.0036182404,0.00048041344,0.0023937225,-0.016662598,0.007965088,0.03390503,0.016830444,-0.03152466,-0.005016327,0.0070152283,0.0096206665,-0.016281128,-0.0070381165,-0.006298065,-0.037719727,0.012634277,0.0032081604,0.013015747,0.0135650635,-0.02772522,0.000046253204,0.026397705,0.004558563,0.015014648,0.006351471,0.0018911362,0.023040771,-0.003627777,-0.007873535,-0.0014457703,-0.006412506,0.0149383545,0.017745972,-0.010765076,-0.027877808,0.022735596,-0.009124756,0.02027893,0.00057554245,-0.013168335,0.012893677,-0.006580353,0.00075149536,0.0031375885,0.011688232,-0.007232666,-0.00957489,-0.015014648,0.035217285,0.056365967,-0.013038635,-0.005580902,0.023986816,0.015281677,0.01638794,0.036865234,0.00818634,0.03869629,0.031585693,-0.017959595,-0.019332886,0.028305054,-0.015014648,-0.028518677,0.010810852,-0.018661499,-0.02029419,0.02029419,0.019042969,0.0049438477,-0.032684326,-0.0050735474,-0.011207581,-0.012039185,0.009757996,-0.018325806,0.0107803345,-0.024032593,-0.021713257,0.010498047,-0.02696228,-0.043395996,-0.020904541,-0.0066947937,-0.011054993,-0.05038452,0.0041770935,-0.022125244,0.00705719,-0.03286743,-0.00617218,-0.0074043274,0.016082764,-0.01524353,-0.016311646,0.0026664734,0.027496338,0.025314331,0.008407593,0.026626587,-0.024887085,-0.022491455,-0.030822754,0.012565613,-0.0065345764,0.023590088,0.0016784668,0.03540039,0.03237915,-0.011566162,-0.0046424866,-0.010375977,-0.0048179626,-0.021896362,-0.015411377,-0.017852783,0.020568848,0.013542175,-0.009895325,-0.009521484,0.047302246,-0.028152466,-0.018844604,0.033081055,0.04248047,0.009094238,0.027008057,-0.020095825,-0.004322052,-0.014297485,-0.0027809143,-0.0063285828,0.0008878708,0.0076789856,0.00868988,-0.007865906,0.003665924,0.023010254,-0.0141067505,0.0046310425,0.033447266,0.0023117065,-0.004917145,0.037475586,0.005039215,0.0018281937,-0.017120361,-0.008331299,0.020492554,0.047973633,0.015838623,-0.00008392334,-0.014564514,-0.00094795227,-0.015090942,0.016601562,0.018173218,-0.019729614,-0.04534912,-0.020629883,-0.036071777,0.021713257,-0.0021648407,0.010383606,-0.010154724,0.016052246,-0.020996094,-0.02192688,-0.02909851,0.033233643,0.009017944,-0.019638062,-0.008125305,0.010070801,0.016021729,-0.04171753,-0.004989624,-0.045776367,-0.029922485,-0.0017852783,-0.02218628,0.028869629,0.011146545,0.0036354065,-0.013221741,-0.0030593872,-0.0007882118,0.0035991669,0.027359009,-0.016052246,-0.00491333,0.035095215,0.018585205,-0.01852417,0.028442383,-0.015052795,-0.00096845627,0.0073509216,-0.015304565,0.017669678,-0.0209198,0.027648926,-0.010772705,-0.005634308,0.029586792,-0.008293152,0.012619019,-0.037261963,0.011268616,0.0034179688,-0.0071487427,0.046173096,-0.028625488,-0.021331787,0.008880615,-0.025436401,-0.026855469,0.0061950684,0.014259338,0.028518677,-0.008460999,0.04244995,-0.016784668,-0.0056877136,0.024795532,0.017974854,-0.017700195,-0.0013866425,0.028182983,-0.0021324158,0.004585266,-0.002439499,-0.018798828,-0.026107788,-0.007987976,0.015586853,-0.00793457,-0.0085372925,0.029647827,0.015945435,0.040527344,-0.008399963,0.025314331,0.011650085,0.0030536652,0.025787354,0.0037441254,0.05340576,-0.004699707,-0.024139404,0.00982666,0.006629944,-0.025283813,0.010917664,-0.0058898926,0.0069007874,-0.041290283,0.01247406,0.0039100647,0.020614624,-0.022384644,0.01448822,-0.024246216,-0.010665894,-0.03491211,-0.008049011,-0.0309906,0.008560181,0.033477783,0.005340576,0.03451538,0.0014696121,-0.033294678,0.00907135,0.04296875,-0.010025024,-0.030197144,-0.023361206,0.011398315,0.008872986,0.017959595,0.00869751,-0.020980835,-0.013404846,0.006664276,-0.015457153,0.0071792603,-0.0000949502,0.011856079,0.0061569214,-0.004573822,-0.011260986,0.028823853,-0.0058288574,-0.010246277,0.008659363,0.0033512115,0.034942627,0.03164673,-0.01058197,0.02078247,0.020446777,-0.044128418,0.056671143,0.0057373047,0.026260376,-0.013198853,0.0012493134,-0.037750244,-0.023376465,-0.016845703,0.0046806335],"createdAt":"2026-04-18T18:58:43.071Z","updatedAt":"2026-04-23T21:32:38.136Z","lastSeenAt":"2026-04-23T21:32:38.136Z","tsv":"'/api/v1/transactions/151':56,160 '/request':13,28 '0.02':12,27,78,153 '000':72 '20':71 '402':66 'Base network API' 'USDC pay-per-call' 'accept':46,196 'access':62,92,169 'across':112 'advertis':83 'ai':122 'analysi':126 'analyt':116 'api':5,20,38,61,85,168,174 'application/json':201 'attach':95 'base':8,23,51,73 'behind':159 'beyond':164 'bodi':205 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67 'classif':129 'connect':181 'convers':146 'data':115,119 'doc':171 'document':163,188 'embed':130 'endpoint':55,111,149,195 'estim':140 'exampl':192 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':158 'gas':139 'generat':147 'geocod':144 'header':100 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'json-response' 'key':86 'label':166 'learn':124 'limit':89 'list':58,151 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'metric':117 'micropayment API' 'minim':180 'network':9,24,52 'no-api-key' 'offer':110 'openapi':189 'page':175 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payload':193 'payment':48,99,105 'per':3,18,36,79,154 'platform':6,21,39,82,109 'post':197 'post-method' 'premium':60,167 'premium API access' 'price':133,172 'prompt':183 'proof':106 'protocol':44 'quot':138 'rate':88,136 'report':118 'request':37,68,155,198,204 'resolv':177 'respons':208 'return':64,200 'schema':190,206 'sentiment':125 'simpli':94 'specif':54,157 'structur':209 'summar':128 'technic':187 'text':127 'token':137 'unit':74 'unknown':211 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':182 'web3':132 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 API' 'x402-payment'","prices":[{"id":"f0a1a22b-22be-41eb-baa6-4bb7da58347f","listingId":"75eed82a-f2fc-4c1c-8b1b-34aa477cefd8","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:43.071Z"}],"sources":[{"listingId":"75eed82a-f2fc-4c1c-8b1b-34aa477cefd8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/151","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:43.071Z","lastSeenAt":"2026-04-23T21:32:38.136Z"}],"details":{"listingId":"75eed82a-f2fc-4c1c-8b1b-34aa477cefd8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/151 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/151"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/151"},{"claim":"Platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-call for API access without managing API keys or subscriptions","Programmatic agents purchasing data or compute on-demand via x402","Testing x402 payment flows against a live endpoint on Base"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-as-you-go API access","Low-volume callers who want no subscription commitment"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume production workloads where per-request costs add up without bulk discounts","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.29Z"},"updatedAt":"2026-04-23T21:32:38.136Z"}}