{"id":"9d461777-4c67-4489-95e8-87963a111532","shortId":"zTdmeX","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/cards/25` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required.\n\nThe broader platform advertises four categories of APIs: 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 per request price point.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint, including this one. The actual functionality behind `/api/v1/cards/25` (\"Premium API Access\") is unclear; the name and path do not map obviously to any of the advertised API categories. Agents should treat this endpoint with caution until more documentation is available.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","json-response","post-method"],"categories":["api-marketplace","misc"],"synonyms":["x402 API","micropayment API","pay-per-request API","Base USDC API","lowpaymentfee","premium API access","402 payment endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema provided for request or response","The purpose and expected input/output of /api/v1/cards/25 ('Premium API Access') is undefined","The endpoint path '/api/v1/cards/25' does not correspond to any of the advertised API categories on the homepage"],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/25","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/cards/25","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 it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The specific purpose of /api/v1/cards/25 is unclear. This is 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":"2026-04-19T02:47:30.738Z","embedding":[-0.031951904,-0.026550293,0.030731201,0.016983032,0.018981934,-0.021987915,-0.046722412,0.02848816,0.07543945,-0.06304932,0.037261963,-0.07434082,-0.037872314,-0.026397705,-0.027816772,0.003932953,-0.01927185,-0.00047159195,-0.038970947,0.044555664,0.04159546,-0.01158905,-0.015594482,0.03387451,-0.0057258606,-0.010475159,0.011184692,0.006462097,-0.00035738945,-0.046844482,0.040863037,-0.024749756,-0.006088257,0.009002686,-0.011199951,-0.026290894,-0.00141716,0.034362793,0.035949707,-0.018081665,0.007545471,-0.04385376,0.01737976,-0.012512207,-0.04534912,-0.0006761551,0.016601562,-0.035858154,-0.022018433,0.0038280487,-0.034698486,-0.013008118,-0.021987915,0.019897461,0.014846802,0.008468628,-0.017440796,-0.034118652,0.020370483,0.010520935,-0.0073127747,-0.04736328,-0.01398468,0.011222839,0.0012273788,0.03552246,-0.024993896,0.04559326,0.012138367,0.066345215,0.043395996,0.03427124,0.025314331,0.009742737,0.007835388,-0.011581421,-0.027145386,0.057434082,-0.016464233,-0.014480591,-0.024017334,0.014167786,-0.057861328,-0.01235199,-0.027420044,-0.06945801,-0.0037498474,0.0066986084,-0.023651123,0.027191162,-0.08972168,-0.00983429,-0.027694702,-0.006580353,-0.013496399,0.00957489,-0.023376465,0.011482239,-0.0005373955,0.012176514,0.012397766,-0.04537964,0.021469116,0.01826477,0.044006348,0.01890564,0.00008440018,0.034851074,-0.010299683,-0.021957397,-0.032958984,0.0017004013,-0.03286743,0.0073127747,0.017318726,0.0234375,-0.012214661,0.021957397,-0.03652954,0.0076828003,-0.05758667,0.04748535,0.028381348,-0.01398468,0.009063721,-0.034332275,-0.0028972626,0.0037765503,-0.027404785,-0.01637268,0.028549194,0.005039215,0.035217285,-0.027374268,-0.02532959,-0.008087158,-0.018707275,-0.031982422,-0.056762695,-0.018096924,0.033172607,-0.027175903,0.028869629,0.018341064,-0.101989746,-0.006526947,-0.049346924,0.019073486,-0.04135132,-0.006755829,0.0066184998,0.021591187,-0.026489258,-0.029373169,-0.0110321045,-0.04937744,-0.014152527,0.02809143,-0.012435913,0.033050537,-0.014808655,0.015312195,0.014427185,-0.004928589,0.013046265,0.023147583,-0.012809753,-0.08343506,-0.08239746,-0.019943237,-0.010406494,-0.019088745,-0.04083252,-0.021499634,-0.02079773,-0.06561279,-0.03338623,-0.029769897,-0.006500244,-0.04067993,-0.017578125,-0.03161621,0.0029735565,-0.0115356445,-0.0519104,-0.0066375732,-0.03967285,0.039916992,0.02017212,0.014778137,0.022735596,0.0038070679,0.06713867,0.02293396,-0.011940002,-0.019515991,0.012107849,-0.023666382,0.038482666,0.014045715,0.008659363,-0.043121338,0.031051636,0.07147217,0.012191772,-0.030700684,0.0017566681,-0.038879395,-0.02659607,-0.01965332,0.0072517395,-0.0065994263,-0.023712158,0.028381348,-0.03137207,-0.037139893,0.0012493134,0.011878967,0.025527954,0.076171875,0.011787415,0.013023376,0.0025844574,0.010063171,-0.052124023,0.037475586,0.036987305,0.011665344,-0.025863647,-0.023529053,0.019317627,0.058746338,-0.02607727,-0.0048103333,-0.015365601,0.017105103,0.008888245,0.006843567,0.028656006,-0.0055351257,-0.025344849,-0.035583496,-0.016098022,0.020339966,-0.0023269653,-0.04034424,-0.04324341,-0.07525635,0.04321289,0.040008545,0.04949951,-0.004432678,-0.0076065063,-0.017242432,-0.0062446594,-0.06524658,0.032196045,0.079589844,-0.008842468,-0.01927185,0.03164673,0.0067825317,-0.029891968,-0.0118637085,0.0030498505,-0.02394104,-0.026306152,0.018753052,-0.040893555,0.009506226,0.02947998,0.03515625,0.032440186,-0.020233154,-0.038360596,-0.034454346,-0.015052795,-0.007259369,-0.024093628,0.01676941,0.0058135986,0.012825012,0.046569824,0.015701294,0.02658081,-0.009101868,0.025115967,-0.011581421,-0.0052948,-0.024459839,-0.03302002,0.016174316,0.010803223,-0.06738281,0.008171082,-0.012840271,0.070007324,-0.045532227,0.03756714,-0.020141602,0.029586792,0.03604126,-0.022644043,-0.03491211,0.002216339,0.024673462,0.042755127,0.03414917,-0.005783081,-0.02104187,-0.019134521,0.054351807,-0.011741638,0.0013275146,-0.0005965233,0.029510498,0.023773193,-0.010566711,-0.039794922,-0.036193848,-0.014083862,-0.03262329,0.031341553,-0.04095459,0.029418945,-0.015594482,0.00020503998,-0.023757935,-0.0082473755,-0.04559326,0.0181427,-0.024429321,0.011695862,-0.012557983,-0.035888672,0.005809784,0.00440979,-0.011169434,-0.012329102,0.034301758,0.023376465,-0.021011353,-0.03552246,-0.0031738281,-0.022644043,-0.00017440319,0.018417358,0.015213013,0.033599854,0.02418518,-0.048736572,0.0074653625,0.021408081,0.011680603,0.011779785,-0.0021953583,0.0038204193,-0.04534912,-0.054595947,-0.02355957,-0.019439697,0.01071167,0.0025978088,0.009269714,0.052001953,0.0074424744,-0.01146698,-0.04006958,0.011291504,-0.049102783,-0.00504303,0.028717041,-0.016311646,-0.046081543,0.008285522,-0.005504608,-0.0010938644,0.04547119,0.012687683,-0.0010128021,0.05911255,0.02961731,0.008277893,0.02444458,0.027160645,0.029556274,-0.0014266968,-0.013710022,-0.04248047,-0.0072402954,0.024047852,-0.029968262,-0.036621094,-0.07409668,0.038757324,0.038146973,0.079589844,0.021240234,0.0052452087,0.026672363,-0.016845703,0.018951416,-0.024139404,-0.016616821,-0.028381348,-0.026306152,0.045166016,-0.014328003,-0.013824463,-0.02961731,0.0390625,-0.0025901794,0.016159058,-0.014915466,0.046813965,-0.02482605,-0.01184082,-0.00017952919,0.0039100647,0.038879395,0.05758667,-0.057861328,0.018676758,0.030517578,-0.017959595,-0.01222229,0.04763794,-0.014778137,-0.017410278,-0.062438965,-0.037750244,-0.0037841797,0.00068092346,-0.05807495,0.03189087,0.006702423,0.035125732,0.0062828064,-0.015434265,-0.0116119385,0.0024604797,-0.029510498,-0.044891357,-0.005252838,-0.043426514,0.0022907257,0.04437256,-0.029907227,0.0001783371,-0.012573242,-0.015487671,0.010070801,0.0019779205,0.011871338,0.0018234253,-0.050201416,0.039916992,0.013145447,0.0016937256,0.03286743,0.04159546,0.01663208,-0.00011175871,0.06732178,0.017852783,-0.017501831,-0.037719727,0.027694702,-0.03930664,-0.010597229,0.0016393661,-0.017608643,0.004924774,-0.018966675,-0.010444641,-0.027526855,0.010871887,-0.010002136,0.015296936,0.038391113,-0.03765869,-0.040008545,-0.07269287,-0.020309448,0.010688782,0.09942627,0.0034008026,-0.0042686462,-0.05203247,-0.0061035156,0.013763428,0.005531311,0.033843994,-0.016159058,-0.015327454,-0.0042266846,-0.032836914,-0.0138168335,-0.022857666,0.038116455,-0.000497818,-0.011520386,0.020599365,0.007408142,0.0052871704,-0.0058135986,-0.0061073303,0.020050049,-0.0149002075,-0.0042686462,-0.03756714,0.029449463,-0.000105559826,-0.0037498474,-0.045684814,0.05114746,0.0065727234,0.047454834,-0.044677734,-0.0056648254,-0.008468628,0.015472412,0.027374268,-0.008972168,-0.009399414,0.011779785,-0.04336548,-0.06707764,0.024475098,-0.021514893,0.01159668,0.0017633438,0.013809204,0.044281006,-0.008728027,0.012207031,0.022277832,-0.037322998,-0.015281677,-0.037963867,-0.02885437,-0.021362305,0.0077438354,-0.030899048,0.015625,-0.019058228,0.0038490295,-0.012451172,-0.021240234,0.040405273,0.018249512,-0.006958008,0.026153564,0.00894165,0.014793396,0.033172607,0.015335083,-0.044189453,0.012626648,-0.0005707741,0.00024604797,-0.007156372,0.038330078,0.033081055,-0.027160645,-0.006210327,-0.0038719177,-0.009841919,-0.010551453,-0.024230957,0.012428284,0.030044556,0.00217247,-0.020309448,0.020828247,0.014045715,-0.020004272,-0.020584106,0.018829346,0.032073975,-0.03552246,0.016830444,0.029556274,0.06097412,-0.035247803,0.016220093,0.010322571,0.030075073,0.0259552,-0.0067443848,-0.010559082,0.016967773,-0.034423828,0.0029258728,-0.0036735535,-0.007785797,0.020202637,0.0107421875,0.025543213,0.03540039,0.02368164,-0.040374756,-0.039123535,0.0055274963,-0.010261536,-0.018630981,0.023635864,0.03503418,0.019180298,-0.019485474,0.036865234,0.032287598,-0.03353882,-0.014862061,-0.01084137,0.04196167,-0.01802063,-0.011390686,0.023330688,-0.007511139,0.015686035,-0.055908203,-0.0016880035,0.0047416687,0.0051116943,-0.008041382,-0.044189453,-0.0473938,0.003194809,0.018707275,0.015396118,0.020980835,0.022537231,0.003036499,-0.0005893707,0.029312134,-0.0017404556,-0.00030732155,-0.0014677048,-0.05029297,-0.027328491,-0.0057525635,-0.0022735596,-0.009376526,0.016189575,-0.018920898,-0.03164673,0.0034122467,-0.016220093,-0.0013847351,-0.015472412,0.009643555,0.033691406,-0.008140564,0.022155762,-0.011138916,-0.025009155,0.0034008026,0.0034542084,0.03010559,-0.03225708,0.02456665,-0.015213013,-0.0016880035,0.00365448,0.023208618,0.0234375,0.028823853,-0.0034770966,0.026794434,-0.038604736,0.039215088,-0.049224854,0.015716553,0.012878418,-0.030410767,-0.0155181885,-0.020950317,-0.018661499,0.037017822,-0.025787354,-0.0008196831,-0.01852417,-0.021911621,-0.0095825195,-0.05029297,0.023773193,0.028030396,0.044036865,-0.033081055,0.013771057,0.024658203,0.01701355,-0.01436615,-0.00995636,0.0028324127,0.01663208,0.017089844,-0.00086164474,-0.029968262,-0.016616821,0.009132385,0.0126953125,-0.051818848,-0.0418396,-0.012290955,0.015731812,0.011817932,-0.020492554,-0.020492554,-0.023849487,-0.0028591156,-0.03062439,0.020751953,0.0069885254,0.031921387,0.010612488,-0.033050537,0.0056915283,0.035858154,-0.026504517,0.038482666,-0.017166138,-0.016220093,-0.04888916,0.008422852,0.015556335,0.016418457,0.0058288574,-0.030700684,0.005580902,-0.027130127,-0.05316162,0.0031776428,-0.014190674,0.008888245,0.0026397705,-0.01927185,-0.057037354,-0.007972717,-0.013519287,0.011444092,0.019378662,0.012634277,-0.00083351135,0.0002951622,-0.0010290146,-0.025054932,-0.024154663,-0.021911621,0.017181396,0.0121154785,0.01638794,0.01737976,0.031463623,-0.0030097961,-0.02331543,0.0043563843,-0.0015382767,0.021881104,-0.019607544,0.0053100586,-0.011184692,0.019561768,-0.00053691864,-0.01727295,-0.03427124,0.0056648254,0.06451416,0.004711151,0.013343811,-0.0039405823,-0.011421204,0.014221191,0.038513184,-0.041015625,0.0006055832,-0.027770996,0.030899048,-0.009010315,0.011009216,0.010070801,0.01889038,-0.027023315,-0.04916382,0.0011672974,0.018859863,-0.00504303,-0.061950684,-0.02078247,-0.06365967,-0.0025119781,-0.019012451,-0.025619507,0.000028669834,0.0018148422,-0.013572693,-0.07904053,0.004081726,0.05255127,0.00092220306,0.020736694,-0.008422852,0.027893066,0.03062439,-0.020858765,-0.017623901,0.020889282,-0.0289917,-0.018447876,-0.0262146,0.040740967,-0.012786865,-0.027923584,0.026931763,0.027954102,0.03741455,0.0030441284,0.0033340454,-0.013977051,0.014625549,-0.0070228577,0.01576233,0.0005950928,-0.010482788,0.037750244,-0.03643799,0.034118652,0.010154724,-0.014709473,0.004638672,0.021881104,0.042388916,-0.029830933,-0.014152527,0.02734375,0.009117126,0.03253174,-0.015686035,0.045013428,0.018051147,-0.011817932,0.006137848,0.0030651093,-0.017959595,-0.03677368,-0.0256958,0.028686523,0.0076065063,0.017410278,-0.014930725,-0.0082473755,0.008483887,-0.00894165,0.0149002075,-0.015335083,-0.0062942505,-0.021102905,0.013916016,0.016036987,-0.012779236,0.005558014,0.018692017,0.012107849,0.037261963,-0.00894165,-0.006652832,0.012962341,0.033355713,-0.005168915,0.0043411255,0.009048462,0.019317627,0.014625549,0.027511597,0.023712158,-0.04031372,-0.013832092,-0.029251099,-0.016983032,-0.017440796,-0.002752304,0.0012207031,-0.0021018982,0.007217407,-0.0062026978,-0.039215088,-0.005844116,-0.030075073,-0.04196167,-0.0003736019,-0.024978638,0.02406311,0.014190674,0.013847351,0.019073486,0.0020427704,0.05633545,-0.0029468536,0.013053894,0.032928467,0.024337769,0.018066406,-0.031082153,-0.009231567,-0.010871887,-0.0058250427,0.013702393,-0.016189575,0.006587982,0.038757324,-0.015731812,0.0057640076,0.006084442,0.025939941,0.005794525,0.007423401,-0.009719849,0.012123108,-0.018112183,0.030075073,-0.04421997,0.012039185,0.024261475,0.016983032,0.014083862,-0.019226074,-0.020339966,0.022354126,-0.0026950836,-0.021118164,0.047698975,-0.006439209,0.0357666,-0.026123047,-0.038360596,0.0016803741,-0.012512207,-0.024169922,0.025283813,-0.00015711784,-0.0016536713,-0.0011701584,-0.04248047,0.042144775,-0.033569336,0.009002686,0.0038013458,0.0059661865,-0.010231018,-0.01373291,0.0010900497,-0.005252838,-0.016357422,-0.008590698,-0.011009216,0.051513672,0.020462036,0.029510498,0.029006958,0.01159668,0.0022563934,-0.02067566,-0.01701355,0.00088882446,-0.024337769,0.01675415,-0.02671814,0.048431396,0.044555664,0.008560181,0.04168701,0.034942627,0.02267456,-0.008102417,0.008583069,-0.01927185,0.02494812,-0.026000977,0.003282547,0.0044403076,0.038116455,-0.029693604,0.018234253,-0.0048179626,0.011650085,-0.030975342,0.0287323,0.07159424,0.020889282,-0.0018100739,0.026245117,-0.013252258,-0.005783081,-0.008300781,-0.010871887,0.06604004,0.009857178,0.039093018,0.041015625,0.015350342,0.0019292831,0.013710022,-0.02607727,-0.020141602,0.055603027,0.027664185,-0.030899048,-0.0030097961,-0.015258789,0.0014228821,-0.046203613,-0.017868042,0.008224487,0.009788513,0.009689331,-0.013267517,-0.01826477,-0.017944336,0.011138916,0.0053977966,0.002002716,-0.003993988,0.012962341,0.024398804,0.0017633438,0.02545166,-0.0042762756,0.031402588,-0.029769897,-0.03265381,0.009651184,0.020721436,-0.00579834,0.014045715,0.03010559,0.011184692,0.034606934,0.031143188,-0.017669678,-0.0043678284,0.0284729,0.00844574,0.0016555786,0.041625977,0.030563354,0.0078048706,0.042755127,0.047912598,0.032043457,-0.025558472,0.0178833,-0.008232117,0.0101623535,-0.009216309,-0.017837524,0.00548172,0.0013856888,0.010429382,0.01876831,-0.018615723,0.016845703,0.018417358,-0.0028934479,0.0007786751,-0.00920105,0.019607544,-0.0105896,0.00868988,-0.005264282,-0.0056114197,0.03265381,0.016189575,0.02520752,-0.023468018,0.022277832,0.0053977966,-0.020858765,-0.005897522,0.010307312,-0.030593872,0.013626099,-0.015670776,-0.013191223,-0.051208496,0.0146865845,0.014572144,0.002275467,0.030273438,0.0025634766,-0.014945984,-0.0047683716,0.02619934,0.019073486,-0.016326904,-0.020462036,-0.023162842,0.04650879,0.044769287,0.010307312,0.00088119507,-0.012687683,0.0003736019,0.024139404,-0.003862381,0.015335083,0.0074043274,-0.001581192,-0.031982422,0.010696411,0.015213013,0.035949707,0.03994751,-0.017745972,-0.015434265,-0.0017299652,0.026245117,0.010902405,-1.7881393e-7,-0.004146576,0.022827148,-0.0050621033,0.04147339,0.029067993,-0.00092458725,0.009590149,-0.019180298,-0.0020141602,0.012306213,-0.012535095,0.018295288,-0.017166138,0.006793976,-0.014015198,0.026229858,-0.019058228,-0.04296875,0.0061836243,-0.008392334,-0.0127334595,-0.018753052,0.013755798,-0.0077323914,0.019180298,0.031982422,0.026748657,-0.02279663,0.068115234,-0.020187378,0.03994751,-0.013374329,-0.020507812,0.058898926,0.03857422,0.0345459,0.012390137,0.021972656,-0.023727417,0.019699097,0.05432129,0.013687134,-0.00062417984,0.004512787,-0.024337769,0.03869629,-0.0008716583,0.03543091,-0.0027999878,-0.0011873245,0.0036239624,-0.015640259,-0.0016641617,-0.006263733,0.00092983246,0.019989014,0.05090332,-0.019851685,-0.0076408386,-0.024215698,-0.017593384,0.022613525,-0.015670776,0.01083374,-0.0053634644,-0.02848816,0.0181427,-0.029693604,-0.01776123,0.0067253113,0.028869629,-0.050048828,-0.029907227,-0.0023880005,0.023132324,-0.04083252,0.024139404,0.018615723,-0.0054779053,0.020080566,0.032928467,-0.0033340454,0.036712646,-0.0030918121,0.030410767,0.04446411,-0.0060806274,-0.0033836365,0.0022563934,0.013206482,-0.012054443,0.007663727,0.030151367,-0.0068740845,0.010353088,-0.0017461777,-0.008735657,-0.007156372,0.013053894,-0.0070228577,-0.0033054352,0.0038414001,-0.0015306473,0.0068092346,0.006980896,-0.001042366,0.0021858215,0.0043678284,-0.016693115,-0.0014915466,0.03665161,0.016204834,-0.041809082,-0.00983429,0.018051147,0.008171082,-0.019744873,-0.019866943,-0.02331543,-0.034576416,0.006919861,0.021377563,0.016235352,0.005706787,-0.027420044,-0.0012226105,0.023986816,0.017028809,0.027999878,0.004146576,-0.020523071,0.0047569275,-0.020462036,0.0043907166,-0.009819031,-0.0059547424,0.021057129,0.024734497,-0.0022640228,-0.033294678,0.027038574,0.0008225441,0.0013771057,-0.00018179417,-0.00983429,0.014793396,-0.01550293,-0.022491455,0.00223732,0.009895325,-0.0026359558,-0.028274536,-0.034210205,0.029281616,0.054656982,-0.009292603,-0.0003721714,0.013137817,0.0071792603,0.034118652,0.03189087,0.012458801,0.038208008,0.021102905,-0.003479004,-0.0234375,0.027633667,-0.012390137,-0.03265381,0.014434814,-0.0020103455,-0.027908325,0.024917603,-0.0016651154,-0.00017166138,-0.020690918,-0.026123047,-0.010604858,-0.01802063,0.02659607,-0.0025081635,0.0016031265,-0.03189087,-0.011726379,0.017807007,-0.010627747,-0.037261963,-0.029006958,-0.009849548,-0.0158844,-0.062805176,0.009513855,-0.020996094,0.006439209,-0.015296936,0.0034503937,0.0134887695,0.042785645,0.00011086464,0.014671326,-0.0029506683,0.035888672,0.015068054,0.021316528,0.014518738,-0.015701294,-0.022277832,-0.010612488,-0.007785797,-0.0070152283,0.01637268,-0.020553589,0.046569824,0.02986145,-0.020629883,-0.0071983337,-0.0121536255,0.0005788803,-0.003162384,-0.037475586,-0.018753052,0.012023926,0.02444458,-0.016555786,-0.006587982,0.038269043,-0.017318726,-0.017028809,0.024093628,0.03302002,0.0067825317,0.03604126,-0.018875122,-0.018630981,-0.015174866,0.0040512085,-0.0035133362,0.010894775,0.009155273,0.009857178,0.0129470825,0.00894165,0.028030396,-0.007408142,0.0038986206,0.019210815,0.021118164,-0.016571045,0.035247803,0.019042969,-0.0065574646,-0.017623901,-0.017684937,0.036254883,0.055847168,0.009963989,0.0050201416,-0.002576828,0.0047187805,-0.011711121,0.0055160522,0.013717651,-0.011383057,-0.041107178,-0.02319336,-0.014343262,0.027328491,-0.0099487305,0.0025100708,0.00031542778,0.012107849,-0.008262634,-0.031463623,-0.01184845,0.026672363,-0.0051345825,-0.020111084,-0.005393982,0.010307312,0.026107788,-0.034454346,0.010063171,-0.055541992,-0.027313232,-0.028198242,-0.019882202,0.025497437,0.0043258667,0.0059928894,0.0041503906,-0.0006380081,-0.0010623932,-0.0011529922,0.014930725,-0.010734558,-0.001991272,0.0087509155,0.011398315,-0.011497498,0.017333984,0.0024433136,-0.005657196,0.006011963,-0.013946533,0.0096588135,-0.025436401,0.036132812,0.015174866,-0.006111145,0.034698486,0.009094238,0.018722534,-0.005619049,-0.0071640015,-0.0024166107,-0.0025177002,0.04067993,-0.01979065,-0.019561768,0.014602661,-0.015213013,-0.039916992,0.009346008,0.028717041,0.021072388,-0.016952515,0.048675537,-0.000048577785,-0.0021381378,0.018859863,0.012641907,-0.012374878,-0.004211426,0.020339966,-0.0022659302,0.0037498474,-0.0050849915,-0.015571594,-0.03048706,-0.016021729,0.013076782,-0.008979797,-0.017562866,0.027069092,0.017807007,0.04360962,-0.008903503,0.028305054,0.03265381,-0.0013847351,0.039276123,0.0051651,0.041503906,0.0011825562,-0.040008545,0.00040888786,-0.00024223328,-0.011947632,-0.0006632805,-0.0040016174,0.0038490295,-0.031555176,0.009552002,0.022537231,0.026672363,-0.026794434,0.014953613,-0.02128601,-0.0073013306,-0.02319336,-0.0017795563,-0.025756836,0.009025574,0.039978027,0.020462036,0.008605957,-0.015960693,-0.0211792,0.028686523,0.051208496,0.005870819,-0.029586792,-0.0025424957,0.008232117,-0.0067634583,-0.0010766983,0.001543045,-0.03010559,-0.02923584,-0.006538391,-0.0135269165,0.00061941147,-0.0051612854,0.033081055,0.0038280487,-0.019317627,0.0021438599,0.014549255,-0.013969421,0.004600525,0.0151901245,-0.008293152,0.032287598,0.03579712,-0.019561768,0.024017334,0.024368286,-0.03543091,0.05014038,-0.0010700226,0.013420105,-0.012565613,0.012901306,-0.040039062,-0.0053520203,-0.0038852692,0.008857727],"createdAt":"2026-04-18T18:43:26.204Z","updatedAt":"2026-04-22T10:31:28.291Z","lastSeenAt":"2026-04-22T10:31:28.291Z","tsv":"'/api/v1/cards/25':65,201 '/request':17,34 '0.02':16,33,74,152 '000':78 '20':77 '402 payment endpoint' '6':84 'Base USDC API' 'access':71,204 'actual':198 'advertis':107,219 'agent':222 'ai':10,27,119 'analysi':123 'analyt':113 'api':4,21,41,70,95,111,163,203,220 'avail':233 'base':7,24,59,79 'behind':49,200 'broader':105 'call':76 'categori':109,221 'caution':228 'classif':126 'connect':172 'content':178 'convers':143 'cost':73 'data':9,26,112,116 'decim':85 'detail':189 'doc':162 'document':157,190,231 'embed':127 'endpoint':14,31,48,63,146,193,226 'estim':137 'exact':92 'exampl':186 'exchang':132 'export':117 'extrem':159 'feed':131 'financ':11,28,128 'four':108 'function':199 'gas':136 'gate':3,20,44 'generat':144 'geocod':141 'handl':88 'includ':194 'infrastructur':139 'insight':118 'json-response' 'key':96 'learn':121 'limit':99 'list':67,148 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':120 'map':213 'marketplac':42 'metric':114 'micropay':53 'micropayment API' 'name':208 'network':60 'obvious':214 'offer':8,25 'one':196 'openapi':182 'page':167 'path':210 'pay-per-request API' 'payment':86 'per':51,75,153 'per-request':50 'per-request-micropayment' 'platform':5,22,106 'point':156 'post-method' 'premium':69,202 'premium API access' 'price':130,155,164 'prompt':174 'protocol':40 'quot':135 'rate':98,133 'readm':166 'render':169 'report':115 'request':52,154 'request/response':185 'requir':103 'schema':183 'scheme':93 'sentiment':122 'settl':54 'spars':160 'specif':62 'subscript':102 'summar':125 'text':124 'token':134 'treat':224 'unclear':206 'unit':80 'usdc':56,82 'usdc-base' 'util':13,30,140 'valid':142 'varieti':46 'via':89 'wallet':173 'web3':129 'x402':2,19,39,91 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"9cca0c97-53fd-4d20-a55b-2d5a90ab298d","listingId":"9d461777-4c67-4489-95e8-87963a111532","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/cards/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:26.204Z"}],"sources":[{"listingId":"9d461777-4c67-4489-95e8-87963a111532","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:26.204Z","lastSeenAt":"2026-04-22T10:31:28.291Z"}],"details":{"listingId":"9d461777-4c67-4489-95e8-87963a111532","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/25 \\\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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/cards/25"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing gated API resources with per-call USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic pay-as-you-go access to miscellaneous data or utility endpoints"],"bestFor":["Developers wanting zero-commitment, pay-per-call API access","AI agents with x402 payment capability on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:27.343Z"},"updatedAt":"2026-04-22T10:31:28.291Z"}}