{"id":"791e04a2-d5bb-479b-a4bc-62ac056e29ce","shortId":"bxSkWC","kind":"x402","title":"Pay-per-request API platform on Base via x402 — analytics, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API platform on Base via x402 — analytics, AI, finance, and utility endpoints at $0.02/call.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request 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 priced at $0.02 per request, paid in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/carts/43` is labeled \"Premium API Access\" and returns a standard x402 challenge requesting up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base. Payment is made via the x402 exact scheme with no API keys, no rate limits, and no upfront commitments required. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The actual functionality behind the `/api/v1/carts/43` path is unclear; the name \"Premium API Access\" and the cart-style URL suggest it may be a generic or demo endpoint rather than a specific service. Without documentation or example responses, it is difficult to determine what data this endpoint actually returns.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","analytics-api","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-api"],"categories":["api-platform","llm","finance","geo"],"synonyms":["pay per call API","x402 API","micropayment API","USDC API","Base network API","lowpaymentfee","no-auth API","crypto payment API"],"warnings":["Documentation pages (/docs, /pricing, /api, /README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema documentation available for any endpoint","The specific endpoint /api/v1/carts/43 has an unclear purpose — 'Premium API Access' is generic and the cart-style URL is unexplained","No example request or response payloads are documented anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/carts/43","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/carts/43","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but documentation is effectively nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The specific functionality of /api/v1/carts/43 is unclear. Pricing is clear ($0.02/request in USDC on Base).","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":"2026-04-18T23:23:21.247Z","embedding":[-0.03253174,-0.027786255,0.020111084,0.0084991455,0.03387451,-0.021713257,-0.04949951,0.045898438,0.066345215,-0.07788086,0.039978027,-0.04876709,-0.026031494,-0.03704834,-0.0071144104,0.015106201,0.007965088,-0.005882263,-0.038330078,0.051757812,0.037994385,-0.009437561,-0.02810669,0.014892578,-0.012573242,-0.027297974,0.0025920868,0.001077652,-0.0104904175,-0.045898438,0.02293396,-0.030578613,-0.005104065,0.011413574,-0.0184021,-0.010314941,-0.0055160522,0.036102295,0.035125732,-0.005973816,-0.0011978149,-0.048858643,0.010253906,-0.01625061,-0.04244995,-0.01802063,0.016067505,-0.02458191,-0.01512146,0.011993408,-0.04751587,0.004753113,-0.011894226,-0.0030784607,-0.0046195984,0.019088745,-0.026809692,-0.003917694,0.019500732,0.010261536,0.0009407997,-0.053741455,-0.02458191,-0.016235352,0.003780365,0.064208984,-0.018005371,0.03765869,0.016464233,0.06921387,0.045410156,0.03378296,0.03555298,0.0035800934,0.015411377,-0.0087890625,-0.013717651,0.0748291,-0.020828247,-0.01449585,-0.010734558,0.005771637,-0.048675537,-0.018844604,-0.019744873,-0.07720947,-0.014022827,0.019256592,-0.02709961,0.01687622,-0.072387695,-0.015396118,-0.013336182,0.015823364,0.0064888,0.008804321,-0.014472961,0.016815186,-0.015594482,0.011650085,-0.0058250427,-0.03793335,0.02079773,0.00730896,0.056518555,0.04586792,0.014793396,0.021621704,0.004009247,-0.037231445,-0.052734375,0.013694763,-0.028076172,-0.003955841,0.011108398,0.018463135,-0.024246216,0.018341064,-0.022888184,0.0129852295,-0.05795288,0.048736572,0.035888672,-0.012184143,-0.009590149,-0.049835205,-0.02609253,-0.0057754517,-0.010551453,-0.016403198,0.02053833,0.0033798218,0.027175903,-0.034057617,-0.020492554,0.004119873,-0.014007568,-0.018051147,-0.046295166,-0.00843811,0.04147339,-0.037475586,0.029220581,0.034606934,-0.09686279,-0.02507019,-0.04171753,0.004383087,-0.033966064,-0.0013980865,-0.018966675,0.025466919,-0.022109985,-0.03475952,-0.014320374,-0.019699097,-0.0057792664,0.024169922,-0.024673462,0.041870117,-0.013534546,0.008872986,-0.011413574,0.008148193,0.014839172,0.017074585,-0.01184082,-0.07208252,-0.084350586,-0.025039673,-0.0113220215,-0.02619934,-0.032348633,-0.01411438,0.015823364,-0.060333252,-0.031402588,-0.024337769,0.014160156,-0.042938232,-0.0112838745,-0.024429321,0.0063095093,0.004142761,-0.054016113,-0.0070114136,-0.0155181885,0.061187744,0.022659302,0.0262146,0.020111084,-0.010551453,0.055480957,0.013023376,-0.021469116,-0.034332275,0.017440796,-0.012641907,0.03579712,0.008132935,-0.00040578842,-0.016586304,0.04711914,0.07141113,-0.0028266907,-0.0050582886,-0.00223732,-0.051971436,-0.048828125,-0.03024292,0.012275696,0.0049209595,-0.011566162,0.05496216,-0.04171753,-0.051513672,-0.00023186207,0.026657104,0.005290985,0.08062744,0.00598526,0.024337769,0.0067825317,0.007331848,-0.023132324,0.044403076,0.040527344,-0.0020999908,-0.014564514,-0.02684021,0.032989502,0.05545044,-0.026138306,0.012664795,-0.01890564,0.03829956,0.011550903,0.013198853,0.027313232,-0.024475098,-0.014350891,-0.031433105,-0.018066406,0.007911682,-0.0044822693,-0.025161743,-0.036865234,-0.09893799,0.046691895,0.025970459,0.047088623,0.0064811707,-0.008773804,-0.023880005,-0.009773254,-0.06695557,0.04522705,0.070129395,-0.0031108856,-0.004638672,0.015808105,0.0015144348,-0.032470703,-0.0073509216,0.012145996,-0.015487671,-0.021621704,-0.0016651154,-0.058654785,0.0016489029,0.017242432,0.032287598,0.06185913,-0.007575989,-0.05050659,-0.018417358,0.015411377,-0.0119018555,-0.020126343,-0.007797241,-0.019363403,0.0012216568,0.028182983,0.017120361,0.021377563,0.0034122467,0.030792236,0.009841919,-0.008728027,-0.022506714,-0.020614624,0.005844116,0.011795044,-0.08099365,0.013870239,-0.014076233,0.08117676,-0.039001465,0.034484863,-0.021697998,0.022659302,0.04071045,-0.006652832,-0.031921387,0.016662598,0.028701782,0.030593872,0.039733887,0.010017395,-0.008079529,-0.008682251,0.070739746,-0.01953125,0.0038051605,-0.003982544,0.013092041,0.03463745,-0.0234375,-0.02494812,-0.034118652,-0.020477295,-0.043151855,0.022613525,-0.016540527,0.036621094,-0.02331543,0.004219055,-0.015960693,0.0029144287,-0.036743164,-0.0016479492,-0.010818481,0.0128479,-0.007965088,-0.028701782,0.005874634,0.02822876,-0.027877808,0.013687134,0.031829834,0.037506104,-0.016098022,-0.040374756,-0.03527832,-0.008369446,0.017410278,0.019882202,0.034820557,0.024276733,0.04788208,-0.032043457,-0.010772705,0.030838013,0.013092041,0.024917603,0.009590149,-0.015419006,-0.053894043,-0.056915283,-0.0184021,-0.031585693,0.025527954,0.022445679,-0.004722595,0.054229736,0.017456055,-0.015312195,-0.056854248,0.014984131,-0.048095703,-0.0024223328,0.032470703,-0.018112183,-0.064819336,-0.00233078,0.010498047,-0.0012865067,0.03881836,0.0054397583,0.021270752,0.06500244,0.02999878,0.0024986267,0.03302002,0.037200928,0.023605347,0.026947021,-0.010765076,-0.016479492,-0.011398315,0.016677856,-0.043914795,-0.025238037,-0.08294678,0.051330566,0.026947021,0.07537842,0.0010948181,0.015899658,0.032104492,-0.008857727,0.018417358,-0.024307251,-0.008399963,-0.0259552,-0.028884888,0.0390625,-0.013153076,-0.011962891,-0.012687683,0.047698975,-0.024963379,0.029724121,-0.027008057,0.05831909,-0.003282547,0.006565094,0.01512146,-0.0000718236,0.04623413,0.049102783,-0.04574585,0.019500732,0.0082473755,-0.034332275,0.010345459,0.046905518,-0.021560669,-0.016159058,-0.054992676,-0.013748169,-0.013725281,0.004180908,-0.044403076,0.0024223328,-0.007587433,0.024673462,0.029190063,-0.034332275,-0.02027893,-0.0009212494,-0.018814087,-0.05166626,-0.0038414001,-0.032165527,-0.000647068,0.058532715,-0.026535034,-0.016235352,-0.01159668,-0.026168823,-0.0001320839,-0.009895325,0.027862549,-0.020248413,-0.026794434,0.03125,0.0019073486,0.004634857,0.02696228,0.04171753,0.03805542,0.010917664,0.058685303,0.022750854,-0.034362793,-0.06756592,0.01638794,-0.044708252,0.007911682,0.010940552,-0.013130188,-0.0047454834,-0.012825012,-0.015960693,-0.028915405,-0.0013971329,-0.008857727,-0.0026359558,0.022354126,-0.027709961,-0.029327393,-0.06719971,-0.03125,-0.0065956116,0.08660889,0.015541077,-0.02079773,-0.044433594,0.00025177002,0.014389038,0.0054512024,0.03149414,-0.015777588,-0.014595032,-0.009262085,-0.032104492,-0.010467529,-0.02659607,0.03111267,-0.0021705627,-0.021270752,0.03086853,0.01449585,0.019134521,-0.008598328,-0.0020484924,0.03677368,-0.024658203,-0.0112838745,-0.023956299,0.048095703,0.0132751465,-0.0040740967,-0.031463623,0.037841797,-0.0013141632,0.026947021,-0.03744507,-0.013847351,-0.017318726,0.0052986145,0.027709961,-0.011886597,-0.011039734,-0.00038194656,-0.052459717,-0.059661865,0.015991211,-0.019165039,0.015083313,0.012748718,0.018539429,0.020614624,-0.0057373047,0.014808655,0.0065994263,-0.009994507,-0.00970459,-0.025680542,-0.028182983,-0.023925781,-0.0044403076,-0.02053833,0.016174316,-0.002822876,0.00072813034,-0.010070801,-0.021896362,0.05697632,0.0007824898,-0.0158844,0.024612427,0.012870789,0.026535034,0.038238525,0.015655518,-0.04660034,0.016799927,0.00046491623,0.0047073364,-0.0015115738,0.05670166,0.039642334,-0.018371582,0.005542755,0.0024147034,-0.020858765,-0.014389038,-0.012016296,0.0070724487,0.040527344,-0.0023937225,-0.04324341,0.02166748,0.009223938,-0.023910522,-0.014266968,0.0020008087,0.022155762,-0.042114258,0.02355957,0.021957397,0.05593872,-0.02822876,0.02079773,0.007858276,0.01928711,0.018676758,0.010604858,-0.021881104,0.017608643,-0.017501831,0.013801575,-0.012016296,0.014785767,0.015823364,0.0045814514,0.019744873,0.03375244,0.018463135,-0.04043579,-0.030197144,0.013168335,-0.03289795,-0.019012451,0.012939453,0.036071777,0.019226074,-0.0137786865,0.02758789,0.013320923,-0.01461792,-0.034576416,-0.014915466,0.040863037,-0.025894165,-0.012245178,0.011489868,0.00039243698,0.009048462,-0.050476074,-0.007896423,-0.0011758804,0.0026454926,-0.017562866,-0.032836914,-0.037109375,-0.0029277802,0.027618408,0.017913818,0.015823364,0.032806396,0.006542206,0.010505676,0.01725769,-0.011169434,-0.015029907,-0.009101868,-0.027450562,-0.0055160522,0.009338379,0.023010254,-0.031173706,0.013420105,-0.003358841,-0.023712158,0.011779785,-0.017990112,-0.0018491745,-0.0065727234,0.0009698868,0.02659607,-0.005203247,0.014663696,-0.017105103,-0.027252197,0.006996155,0.00038933754,0.022277832,-0.049041748,0.016418457,-0.007843018,-0.014472961,0.0006670952,0.030456543,0.009788513,0.025405884,0.0184021,0.025161743,-0.039489746,0.038085938,-0.03137207,0.023803711,0.0032863617,-0.032073975,-0.008506775,-0.01725769,-0.02418518,0.043426514,-0.014663696,-0.018173218,-0.018203735,-0.025466919,-0.0035152435,-0.046936035,0.032348633,0.04827881,0.046295166,-0.01374054,0.0041046143,0.007160187,0.0036964417,-0.005580902,-0.014564514,-0.0033893585,0.022140503,0.008674622,0.0076904297,-0.03793335,-0.014060974,-0.003982544,0.014945984,-0.053588867,-0.037475586,-0.009117126,0.007446289,-0.0118637085,-0.0085372925,-0.020843506,-0.046203613,-0.0042533875,-0.0418396,0.013969421,0.0056037903,0.013381958,0.009132385,-0.01763916,-0.00007104874,0.006385803,-0.01499939,0.029296875,-0.01838684,-0.02796936,-0.034240723,0.0016374588,0.026504517,0.021835327,0.0013198853,-0.013763428,0.00064992905,-0.031188965,-0.05090332,-0.0034828186,-0.018676758,-0.009742737,-0.0071258545,0.0070114136,-0.04837036,-0.0027599335,-0.035980225,-0.0045433044,0.03677368,0.017044067,0.0056266785,-0.011947632,-0.007888794,-0.020126343,-0.016098022,-0.040161133,0.031402588,0.012191772,-0.0003592968,0.023849487,0.047943115,-0.008361816,-0.0034332275,0.00046610832,0.010482788,0.024597168,-0.013473511,0.0019445419,-0.022537231,0.014793396,-0.023452759,-0.009712219,-0.024429321,-0.003194809,0.06317139,0.0076560974,0.0061683655,-0.007583618,-0.021148682,0.016021729,0.024673462,-0.039520264,-0.0017662048,-0.023513794,0.029586792,-0.015380859,0.02368164,0.0031394958,0.008758545,-0.03086853,-0.04562378,-0.0025291443,0.0024299622,-0.022369385,-0.07159424,-0.0206604,-0.06213379,-0.012809753,-0.01235199,-0.029785156,-0.016799927,0.016189575,-0.0067596436,-0.08630371,0.0077934265,0.05630493,-0.012664795,0.032562256,0.0037193298,0.019226074,0.026794434,-0.034240723,0.0009613037,0.020889282,-0.029052734,-0.025283813,-0.009918213,0.017990112,-0.009132385,-0.018508911,0.012199402,-0.0022029877,0.018081665,-0.0068740845,0.014755249,-0.012199402,0.032806396,-0.0065345764,0.029922485,-0.015686035,-0.0057792664,0.047332764,-0.06298828,0.010932922,0.008628845,-0.014472961,0.0014352798,0.031951904,0.030944824,-0.03302002,-0.014076233,0.041870117,0.006652832,0.030212402,-0.019073486,0.03463745,-0.0049476624,-0.012687683,0.008346558,-0.010917664,-0.016952515,-0.041259766,-0.036193848,0.030944824,-0.0004415512,0.01687622,-0.011741638,-0.0059776306,0.009490967,-0.008522034,0.0056495667,-0.02798462,-0.017852783,-0.02494812,-0.0044288635,0.0074043274,-0.0039749146,0.0055236816,0.023452759,0.00018787384,0.036712646,0.01499939,0.007499695,0.011627197,0.038360596,-0.008628845,0.0074920654,0.011062622,0.015472412,0.009994507,0.015037537,0.01424408,-0.04147339,-0.0014181137,-0.033111572,-0.0069770813,0.00592041,-0.017990112,-0.010437012,0.0011768341,-0.0024738312,-0.019973755,-0.028503418,0.004310608,-0.029830933,-0.014549255,-0.019866943,-0.007194519,0.019882202,0.01663208,0.007297516,0.015396118,-0.0096206665,0.048614502,0.006000519,-0.0063667297,0.021987915,0.020126343,0.020477295,-0.03189087,-0.007751465,0.012626648,-0.0024299622,0.010116577,-0.035064697,0.008415222,0.020980835,-0.006996155,0.009925842,0.0005950928,0.04925537,-0.005458832,0.006008148,0.004798889,0.020736694,-0.029815674,0.039123535,-0.0513916,0.008544922,0.020980835,-0.001042366,-0.002943039,-0.011993408,-0.02923584,0.023468018,0.0004529953,-0.008514404,0.044830322,-0.0046424866,0.032226562,-0.022033691,-0.034210205,-0.0028839111,-0.019485474,-0.018615723,0.02810669,-0.0065460205,0.0069351196,0.015274048,-0.031555176,0.038238525,-0.032165527,0.013710022,-0.004638672,0.011787415,0.005393982,-0.0067481995,-0.015083313,0.0069351196,-0.025848389,-0.0027503967,-0.004753113,0.05441284,0.02609253,0.03503418,0.03363037,0.013877869,0.014129639,-0.041870117,-0.026123047,-0.013687134,-0.021331787,0.024551392,-0.0062828064,0.049682617,0.03857422,0.007183075,0.0362854,0.03878784,0.047698975,-0.00932312,0.012458801,-0.012145996,0.006263733,-0.015609741,0.0023918152,0.01071167,0.036895752,-0.02999878,0.024475098,0.010437012,0.018585205,-0.020706177,0.027679443,0.061523438,0.030975342,0.007549286,0.030029297,-0.0019817352,-0.029586792,-0.009635925,-0.018157959,0.058685303,0.016738892,0.0637207,0.037719727,0.008735657,-0.005508423,0.0231781,-0.019439697,-0.013175964,0.04727173,0.025878906,-0.007785797,-0.010810852,-0.0022907257,0.009254456,-0.047180176,-0.02243042,-0.007270813,0.01802063,-0.005859375,-0.008895874,-0.013504028,-0.012992859,-0.0007247925,0.010864258,0.010322571,-0.013801575,0.021102905,0.025466919,0.0055770874,0.023925781,-0.015991211,0.043182373,-0.022918701,-0.031433105,0.01725769,0.011245728,-0.007911682,0.0029354095,0.021255493,-0.0065612793,0.033233643,0.04244995,-0.019363403,-0.0034980774,0.00932312,0.014076233,0.0007867813,0.048828125,0.038330078,0.013626099,0.032806396,0.032409668,0.023834229,-0.034088135,0.011833191,0.0031661987,0.008422852,-0.014549255,-0.030593872,0.01461792,-0.0050468445,0.0031833649,0.0024547577,-0.030731201,0.015655518,0.020355225,0.002746582,-0.008354187,-0.008506775,0.019577026,-0.0088272095,-0.0073051453,-0.0021915436,0.006011963,0.033599854,0.008766174,0.02330017,-0.031799316,0.020614624,-0.0064086914,-0.016738892,0.0056152344,0.025787354,-0.026550293,0.020370483,-0.0032997131,0.00085258484,-0.042388916,0.0014457703,0.01184082,-0.008621216,0.015808105,0.0045433044,-0.002729416,-0.0015182495,0.015586853,0.014770508,-0.016448975,-0.011192322,-0.029434204,0.032592773,0.02720642,0.004749298,0.010063171,-0.015449524,0.0014429092,0.00484848,-0.00982666,0.008041382,-0.00013184547,-0.021820068,-0.020706177,0.021896362,0.03149414,0.036315918,0.03475952,-0.014945984,-0.016906738,-0.01449585,0.033599854,0.017654419,-0.0016536713,-0.0032463074,0.009056091,-0.00705719,0.056365967,0.020523071,0.009460449,0.024124146,-0.023635864,-0.01348114,0.014183044,-0.026763916,0.017333984,-0.017852783,0.0009012222,-0.0073242188,0.017929077,-0.0074806213,-0.04397583,0.021652222,-0.010383606,-0.02330017,-0.01727295,0.025924683,-0.0031337738,0.02670288,0.022613525,0.016571045,-0.031585693,0.06390381,-0.019638062,0.05154419,-0.0014448166,-0.014282227,0.038269043,0.028503418,0.04864502,0.012451172,0.012168884,-0.033355713,0.0102005005,0.037750244,0.030456543,0.011779785,-0.0034370422,-0.019561768,0.027404785,0.008239746,0.02760315,-0.0021953583,0.00028014183,0.013938904,-0.00969696,0.0023956299,-0.0045776367,0.001206398,0.008476257,0.04171753,0.00029206276,-0.008178711,-0.019195557,-0.016647339,0.024520874,-0.0014953613,-0.0032634735,-0.0058288574,-0.021759033,0.015975952,-0.036346436,-0.010810852,0.014541626,0.020263672,-0.045166016,-0.024810791,0.01146698,0.023498535,-0.021224976,0.03616333,0.006416321,-0.009208679,0.026016235,0.032928467,-0.013847351,0.020858765,-0.0021381378,0.021224976,0.041534424,0.0037059784,-0.026229858,0.0023326874,0.019058228,-0.027008057,0.018692017,0.026245117,-0.004142761,-0.011772156,-0.005821228,-0.014541626,-0.0031909943,0.0035362244,0.0035133362,-0.00058603287,-0.010925293,-0.005344391,0.010353088,0.017486572,0.011253357,0.006587982,-0.02243042,-0.014228821,0.0044136047,0.04647827,0.0132369995,-0.03778076,0.010345459,-0.004142761,0.015609741,-0.014961243,-0.00299263,-0.016189575,-0.035125732,0.023849487,0.012840271,-0.0019006729,0.0065689087,-0.023590088,0.0024681091,0.026443481,0.00687027,0.015838623,0.009643555,-0.01146698,-0.000026226044,-0.015380859,-0.015205383,-0.007850647,-0.011192322,0.00041937828,0.011199951,0.004840851,-0.025222778,0.020431519,0.009757996,0.00299263,-0.006515503,-0.021392822,0.0134887695,-0.02267456,-0.01687622,0.0019741058,0.008514404,-0.007980347,-0.011833191,-0.024124146,0.037963867,0.055023193,-0.013420105,-0.012809753,0.019607544,0.022735596,0.020721436,0.04031372,0.009269714,0.050750732,0.030273438,-0.020217896,-0.021224976,0.014823914,-0.010192871,-0.02154541,0.017074585,0.0062713623,-0.019500732,0.024902344,0.0060539246,-0.007820129,-0.036376953,-0.025772095,-0.015037537,-0.017929077,0.007331848,0.008270264,0.0053253174,-0.015258789,-0.016830444,0.0032310486,-0.021591187,-0.04837036,-0.019866943,-0.007045746,-0.016311646,-0.06011963,-0.0013990402,-0.025161743,0.01499939,-0.016815186,-0.006690979,-0.012428284,0.04446411,-0.0141067505,-0.0041503906,0.010093689,0.018661499,0.019302368,0.0030384064,0.025405884,-0.029296875,-0.026977539,-0.022201538,-0.00033712387,-0.02116394,0.009788513,-0.0007519722,0.049072266,0.014389038,-0.0016880035,-0.0068588257,-0.018341064,0.013549805,-0.009635925,-0.03527832,-0.006008148,0.028152466,0.020751953,0.0116119385,-0.0013256073,0.021240234,-0.0345459,0.008338928,0.02458191,0.038116455,0.016494751,0.022567749,-0.010856628,-0.009384155,-0.021713257,0.00089263916,-0.0070266724,0.009216309,0.008377075,-0.0012359619,0.0016880035,0.022750854,0.011268616,-0.01033783,-0.016845703,0.023635864,0.0020446777,-0.008255005,0.03010559,0.030685425,0.00060653687,-0.017456055,-0.009674072,0.032470703,0.04638672,0.002817154,0.018692017,-0.0050315857,-0.003627777,-0.008666992,0.0041770935,0.011108398,-0.014007568,-0.03717041,-0.03062439,-0.026428223,0.037719727,-0.008079529,-0.000623703,0.004371643,0.013175964,-0.016601562,-0.035705566,-0.019104004,0.016189575,-0.0059509277,-0.012763977,-0.007621765,-0.008544922,0.02897644,-0.02420044,-0.0026550293,-0.046966553,-0.026931763,-0.007858276,-0.01802063,0.022857666,0.016220093,-0.013656616,0.0029449463,0.010116577,-0.0066337585,0.002922058,0.02178955,-0.015449524,0.0009870529,0.008377075,0.011207581,-0.03161621,0.016738892,-0.007499695,-0.0008907318,0.017333984,-0.010368347,0.011474609,-0.018478394,0.026443481,-0.003917694,-0.01134491,0.04043579,0.009254456,0.010063171,-0.019989014,0.00868988,-0.005432129,0.00050115585,0.048187256,-0.020751953,-0.018920898,0.01398468,-0.014770508,-0.02394104,0.0069351196,0.01776123,0.030975342,-0.005264282,0.043029785,-0.012626648,-0.0064697266,0.008148193,0.008857727,-0.026184082,0.004989624,0.036010742,0.0061683655,0.003452301,-0.0058059692,-0.012870789,-0.020233154,-0.0045051575,0.015106201,-0.0012779236,-0.02394104,0.014472961,0.016815186,0.040985107,0.0088272095,0.005504608,0.029342651,-0.011138916,0.03817749,0.010566711,0.034362793,-0.0058174133,-0.034240723,0.0015192032,-0.011695862,-0.025009155,0.0056610107,-0.010429382,-0.010856628,-0.033691406,0.014671326,0.01222229,0.028564453,-0.01826477,0.011405945,-0.027633667,-0.008323669,-0.0335083,-0.011276245,-0.029159546,0.013916016,0.03994751,0.01398468,0.014564514,-0.000620842,-0.013893127,0.02696228,0.053588867,-0.007648468,-0.033325195,0.005634308,-0.0016593933,-0.016143799,0.01197052,0.006504059,-0.020355225,-0.026382446,0.002111435,-0.021835327,0.0046577454,-0.010147095,0.015731812,-0.0004811287,0.005859375,0.006351471,0.014808655,-0.0151901245,0.005821228,0.0068206787,0.0006785393,0.025726318,0.027252197,-0.027496338,0.028640747,0.021209717,-0.04650879,0.04046631,-0.0064353943,0.03189087,-0.020492554,0.014854431,-0.037963867,-0.024337769,-0.009307861,0.004055023],"createdAt":"2026-04-18T18:37:50.001Z","updatedAt":"2026-04-23T14:00:42.162Z","lastSeenAt":"2026-04-23T14:00:42.162Z","tsv":"'/api':179 '/api/v1/carts/43':113,213 '/call':19,38 '/docs':177 '/pricing':178 '/readme':181 '0.02':18,37,99,134 '000':129 '20':128 '6':139 'Base network API' 'USDC API' 'accept':165 'access':118,221 'across':58 'actual':209,256 'addit':192 'ai':12,31,68 'ai-inference' 'analysi':72 'analyt':11,30,62 'analytics-api' 'api':5,24,45,117,153,220 'application/json':170 'avail':207 'base':8,27,107,130,142 'behind':211 'broad':50 'cart':225 'cart-styl':224 'catalog':51 'categori':60 'challeng':124 'classif':75 'classification' 'commit':161 'connect':187 'content':193 'convers':92 'crypto payment API' 'data':61,65,253 'decim':140 'demo':235 'determin':251 'difficult':249 'document':172,202,243 'embed':76 'embeddings' 'enabl':44 'endpoint':16,35,57,95,111,164,236,255 'estim':86 'exact':149 'exampl':206,245 'exchang':81 'export':66 'extrem':174 'feed':80 'financ':13,32,77 'finance-data' 'four':59 'function':210 'gas':85 'generat':93 'generic':233 'geocod':90 'geocoding' 'infrastructur':88 'insight':67 'key':154 'label':115 'learn':70 'limit':157 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':69 'made':145 'may':230 'metric':63 'micropayment API' 'name':218 'network':108 'no-auth API' 'offer':48 'openapi':197 'page':182 'paid':102 'path':214 'pay':2,21,54 'pay per call API' 'pay-per-request':1,20,53 'payment':143 'per':3,22,55,100 'platform':6,25,46 'post':166 'premium':116,219 'price':79,97 'prompt':189 'quot':84 'rate':82,156 'rather':237 'render':184 'report':64 'request':4,23,56,101,125,167 'request/response':200 'requir':162 'respons':171,246 'return':120,169,257 'schema':201 'scheme':150 'sentiment':71 'sentiment-analysis' 'servic':241 'sinc':136 'spars':175 'spec':198 'specif':110,240 'standard':122 'style':226 'suggest':228 'summar':74 'text':73 'text-summarization' 'token':83 'unclear':216 'unit':131 'upfront':160 'url':227 'usag':205 'usd':135 'usdc':104,133,137 'usdc-base' 'use':138 'util':15,34,89 'utility-api' 'valid':91 'via':9,28,146 'wallet':188 'web3':78 'without':242 'x402':10,29,43,123,148 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"9e5160eb-0afb-4293-9e1a-c5bd6dc429b8","listingId":"791e04a2-d5bb-479b-a4bc-62ac056e29ce","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/carts/43","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:50.001Z"}],"sources":[{"listingId":"791e04a2-d5bb-479b-a4bc-62ac056e29ce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/carts/43","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:50.001Z","lastSeenAt":"2026-04-23T14:00:42.162Z"}],"details":{"listingId":"791e04a2-d5bb-479b-a4bc-62ac056e29ce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/carts/43 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no minimums, no commitments, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/carts/43"},{"claim":"Payment settles on Base network using exact scheme","source_url":"https://lowpaymentfee.com/api/v1/carts/43"}],"useCases":["Accessing analytics metrics and reports without API key management","Running AI inference (sentiment, summarization, classification, embeddings) on a per-request payment basis","Fetching real-time crypto prices, gas estimates, and exchange rates","Geocoding and data conversion utilities with instant pay-per-use access"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-cost micro-transactions for API calls"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume use cases where per-request pricing may add up compared to subscription plans","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.804Z"},"updatedAt":"2026-04-23T14:00:42.162Z"}}