{"id":"e18316ec-22c7-43fc-b5f4-c4b7d30c7d5e","shortId":"nW3BYS","kind":"x402","title":"x402-gated card-transactions endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated card-transactions endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com exposes a card-transactions resource at `/api/v1/cards/87/transactions` behind an x402 payment challenge. It is part of a broader platform that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint listed here (`/api/v1/cards/87/transactions`) is described only as \"Premium API Access\" with no further documentation on request or response schemas. The x402 challenge confirms it accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02. Payment is made via the x402 exact scheme to the payTo address. No API keys or rate limits are advertised; access is gated purely by the per-request micropayment.\n\nDocumentation across the site is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no explanation of what data the `/cards/87/transactions` resource actually returns. The endpoint is live (returns a proper 402 challenge), but without documentation it is unclear what payload to POST or what the response structure looks like.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","card-transactions","pay-per-request","no-api-key"],"categories":["finance","payments"],"synonyms":["card transactions API","x402 micropayment API","USDC pay-per-call","lowpaymentfee","Base network API","402 payment endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No request or response schema provided; unclear what data this endpoint returns","The path '/api/v1/cards/87/transactions' contains a hardcoded ID (87) with no explanation","The generic title 'Premium API Access' does not describe the endpoint's actual function"],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/87/transactions","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/87/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the endpoint does, what request body it expects, or what it returns. The description 'Premium API Access' is generic and uninformative. No OpenAPI spec, no examples, and all doc pages are empty.","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":"2026-04-19T03:07:27.140Z","embedding":[-0.045562744,-0.035461426,0.037719727,-0.0016489029,0.0138549805,-0.037628174,-0.02583313,0.031951904,0.07354736,-0.06774902,0.037078857,-0.045135498,-0.054260254,-0.02758789,-0.03161621,0.0095825195,-0.024810791,0.009498596,-0.028839111,0.039215088,0.04598999,-0.02658081,-0.017288208,0.03579712,-0.007255554,-0.005722046,-0.012763977,-0.0005431175,-0.012840271,-0.04525757,0.04574585,-0.019744873,-0.015823364,-0.008361816,0.003627777,0.016296387,0.0020141602,0.03970337,0.04736328,-0.018844604,0.019088745,-0.06378174,-0.0041503906,-0.007080078,-0.029281616,-0.016616821,0.010681152,-0.048858643,-0.0008716583,-0.007247925,-0.04397583,0.0017204285,-0.0061950684,0.021057129,0.012748718,-0.0076828003,-0.019195557,-0.030792236,0.0013055801,0.022567749,-0.018173218,-0.057159424,-0.0064048767,-0.008178711,-0.00013828278,0.033721924,-0.025131226,0.061767578,0.0036697388,0.06774902,0.040008545,0.024978638,0.021606445,0.025024414,0.021514893,-0.011871338,-0.02279663,0.06384277,-0.008842468,-0.017303467,-0.015098572,-0.020950317,-0.05328369,-0.013763428,-0.024993896,-0.0625,-0.020523071,-0.0066986084,-0.02557373,0.020553589,-0.07501221,-0.0015459061,-0.004951477,0.005645752,-0.021514893,-0.013572693,-0.039855957,0.004508972,-0.006298065,0.019454956,0.025604248,-0.05041504,0.049621582,0.009056091,0.049591064,0.018295288,0.0076408386,0.036834717,-0.015113831,-0.02330017,-0.020706177,0.011451721,-0.0005168915,-0.0030002594,0.029663086,0.0119018555,-0.018463135,0.023529053,-0.035736084,0.027374268,-0.046936035,0.046173096,0.006881714,-0.03086853,0.018615723,-0.04876709,0.006313324,0.0073242188,-0.04473877,-0.004436493,0.032409668,0.012161255,0.02532959,-0.024810791,-0.013458252,0.026947021,-0.028579712,-0.001253128,-0.040039062,-0.029205322,0.015327454,-0.02204895,0.019607544,0.043273926,-0.10266113,-0.010513306,-0.03515625,0.015930176,-0.03463745,-0.007865906,0.010398865,0.022735596,-0.006587982,-0.029785156,-0.0076408386,-0.045013428,-0.008804321,0.058746338,-0.017715454,0.022262573,-0.00051498413,0.0028190613,0.0000012516975,0.019500732,0.015098572,0.03125,-0.010055542,-0.0637207,-0.07269287,-0.030639648,0.01436615,-0.01687622,-0.059265137,0.0017881393,-0.04763794,-0.06951904,-0.03173828,-0.029251099,-0.028167725,-0.048217773,-0.011756897,-0.030975342,0.0019407272,-0.004676819,-0.06738281,-0.01360321,-0.033813477,0.034698486,0.021530151,0.003955841,0.014717102,0.01965332,0.059020996,0.017105103,0.0024681091,-0.03213501,0.025741577,-0.010322571,0.04751587,0.023834229,0.01499939,-0.03717041,0.01713562,0.08380127,-0.002008438,-0.041809082,0.005554199,-0.041229248,-0.037841797,-0.008911133,0.014060974,-0.0030555725,-0.016860962,0.02166748,-0.020370483,-0.029129028,0.015174866,0.02558899,0.03414917,0.046081543,0.011672974,0.012313843,0.020507812,0.00434494,-0.01574707,0.051696777,0.0395813,0.027359009,-0.021240234,-0.044921875,0.014328003,0.054901123,-0.034362793,-0.005256653,-0.0036811829,0.02784729,-0.005718231,0.0068588257,0.01889038,-0.001452446,-0.01802063,-0.027282715,-0.0095825195,0.009094238,0.011199951,-0.0335083,-0.046539307,-0.07183838,0.06524658,0.051361084,0.035125732,-0.009788513,-0.019622803,-0.010688782,-0.02407837,-0.056610107,0.03652954,0.070007324,-0.026763916,0.008056641,0.046539307,-0.0027618408,-0.035125732,-0.024002075,-0.04159546,-0.022705078,-0.026031494,0.007949829,-0.030563354,-0.003080368,0.020187378,0.030731201,0.039733887,-0.002960205,-0.04257202,-0.047302246,-0.00566864,0.014190674,-0.01285553,-0.0049591064,0.016494751,0.02407837,0.015960693,0.004722595,0.007972717,0.007537842,0.023910522,-0.005207062,0.020584106,-0.022857666,-0.03778076,0.016983032,-0.0039367676,-0.06591797,0.00009250641,-0.008575439,0.043060303,-0.038146973,0.034057617,-0.023254395,-0.0053863525,0.04046631,-0.024154663,-0.041931152,0.004043579,0.014793396,0.041931152,0.038482666,0.0010213852,0.0044174194,-0.028320312,0.06286621,-0.009391785,-0.004840851,0.024276733,0.029022217,0.019744873,0.0058403015,-0.037261963,-0.057891846,-0.0028743744,-0.016067505,0.039916992,-0.013122559,0.03982544,-0.03842163,-0.009857178,-0.021240234,0.007446289,-0.043914795,-0.014816284,-0.022720337,-0.006134033,-0.03829956,-0.035339355,0.0070877075,-0.013999939,0.0030937195,-0.012840271,0.060760498,0.011131287,-0.0018796921,-0.012275696,-0.015060425,-0.02822876,0.0076904297,0.025436401,0.021820068,0.02835083,0.030380249,-0.028579712,0.015670776,0.0068588257,0.016311646,0.017822266,0.00699234,-0.01927185,-0.035339355,-0.034729004,-0.021224976,-0.0074920654,0.02407837,-0.0077819824,0.00982666,0.068359375,0.032165527,-0.013420105,-0.018234253,0.015060425,-0.063964844,-0.011398315,0.011878967,0.0028533936,-0.045318604,0.0054092407,-0.019546509,-0.0042152405,0.035614014,0.03189087,0.018539429,0.056030273,0.04534912,0.008934021,0.03265381,0.006023407,0.03149414,-0.009216309,-0.022201538,-0.0262146,-0.030838013,0.019348145,-0.0031147003,-0.041778564,-0.0602417,0.042053223,0.039031982,0.07312012,0.022628784,0.0025844574,0.02822876,0.008346558,0.008995056,-0.021377563,-0.03753662,-0.02645874,-0.03488159,0.033111572,-0.0027637482,-0.016479492,-0.013191223,0.024734497,0.008712769,0.012802124,-0.021514893,0.044158936,-0.020843506,-0.027175903,0.03463745,0.004886627,0.043121338,0.05630493,-0.040649414,0.015686035,0.023742676,-0.030532837,0.003643036,0.044189453,-0.0075302124,-0.014282227,-0.0345459,-0.034820557,0.020568848,0.011260986,-0.058807373,0.029022217,0.006401062,0.04309082,0.008018494,-0.02381897,-0.045410156,0.010047913,-0.01701355,-0.03930664,0.016418457,-0.026062012,0.027145386,0.060150146,-0.03164673,0.013839722,-0.009002686,0.003194809,0.016799927,0.0023880005,-0.002664566,-0.00065755844,-0.039978027,0.034423828,0.0090408325,0.017150879,0.013687134,0.03152466,0.008132935,0.013725281,0.038238525,0.012390137,-0.011558533,-0.051849365,0.02305603,-0.027709961,-0.0059013367,0.022720337,-0.022537231,0.0051345825,-0.0031909943,-0.0206604,-0.024459839,0.014457703,-0.0031604767,-0.004524231,0.049957275,-0.025283813,-0.027938843,-0.068603516,-0.01914978,0.025360107,0.062194824,0.0076408386,-0.006576538,-0.053222656,0.0051460266,0.03466797,0.00674057,0.00843811,-0.0138549805,-0.008674622,0.008270264,-0.03277588,-0.043060303,-0.01084137,0.043640137,0.0007786751,-0.0018167496,0.020828247,0.005569458,-0.0073013306,0.0017957687,-0.008636475,0.031341553,0.003730774,-0.0061416626,-0.018920898,0.03466797,0.0019779205,-0.042755127,-0.052764893,0.025482178,-0.011871338,0.053833008,-0.029144287,-0.013114929,-0.013305664,0.003255844,0.015571594,-0.005634308,0.0017366409,-0.0052833557,-0.028945923,-0.06329346,0.031921387,0.000077307224,0.02230835,0.016494751,0.015304565,0.032592773,-0.010726929,0.0023097992,0.017471313,-0.025665283,-0.02381897,-0.04989624,-0.025680542,-0.018188477,-0.013061523,-0.033416748,0.018951416,0.0011901855,0.013923645,0.000048696995,-0.019744873,0.026031494,-0.0024471283,0.00274086,0.0072402954,0.008575439,0.008216858,0.019241333,0.016784668,-0.0592041,0.015266418,0.006965637,-0.0053863525,-0.01260376,0.03918457,0.023223877,-0.030166626,0.0019197464,-0.0050315857,-0.032806396,-0.016159058,-0.020568848,0.008857727,0.037078857,0.009719849,-0.029296875,0.028564453,-0.0036239624,-0.031021118,-0.040039062,0.0146102905,0.04269409,-0.043426514,0.008407593,0.01914978,0.06173706,-0.021835327,0.020187378,0.010398865,0.036102295,0.026611328,-0.012123108,0.00039291382,0.038604736,-0.0069847107,0.02243042,-0.010917664,-0.0009198189,0.008491516,0.0076141357,0.02229309,0.011962891,0.012756348,-0.027816772,-0.034576416,-0.0022583008,-0.004070282,-0.0074005127,0.010513306,0.023666382,0.03640747,-0.01096344,0.030975342,0.036468506,-0.019866943,-0.01777649,-0.006450653,0.030227661,-0.019622803,0.0008049011,0.009643555,0.009017944,0.03164673,-0.07043457,-0.010192871,0.013931274,0.008255005,0.012908936,-0.072265625,-0.030578613,0.0045166016,0.023239136,-0.0013532639,0.009315491,0.015434265,0.0021648407,0.0042304993,0.023803711,-0.0057411194,-0.01574707,0.0007543564,-0.048980713,-0.027862549,-0.00011616945,0.00592041,0.00061941147,0.023376465,-0.025009155,-0.012565613,0.01473999,-0.04824829,0.011871338,-0.017837524,0.025756836,0.0317688,-0.022583008,0.010543823,-0.008010864,-0.0158844,-0.002483368,0.009567261,0.021438599,-0.028320312,0.029891968,-0.036315918,-0.0050735474,-0.003982544,0.011047363,0.026168823,0.016860962,-0.009933472,0.021499634,-0.040771484,0.031021118,-0.023391724,0.012191772,-0.005016327,-0.013328552,-0.011009216,-0.02067566,-0.023361206,0.043182373,-0.002204895,-0.012641907,-0.031341553,-0.04144287,-0.004173279,-0.06188965,0.025131226,0.023834229,0.04107666,-0.019210815,0.009284973,0.003643036,-0.0004401207,0.0022068024,-0.00007939339,-0.008995056,0.026153564,0.03173828,0.016143799,-0.04269409,-0.011421204,-0.010108948,-0.0010328293,-0.052459717,-0.03756714,-0.009033203,0.045806885,0.001332283,-0.0047035217,-0.030715942,-0.012031555,-0.005050659,-0.044799805,0.02166748,-0.0032463074,0.01838684,-0.0040664673,-0.017196655,-0.0031814575,0.010391235,-0.01158905,0.046569824,-0.0044288635,-0.020019531,-0.042663574,0.006690979,0.012039185,0.038085938,-0.012863159,-0.02960205,0.008476257,-0.033355713,-0.0446167,-0.008148193,-0.011070251,0.0063209534,0.007396698,-0.014854431,-0.058044434,-0.0021858215,-0.029632568,-0.007949829,0.020111084,-0.0036792755,0.016952515,0.004802704,-0.00013422966,-0.013648987,-0.02166748,-0.024139404,0.010673523,0.010032654,0.02204895,0.0069732666,0.051849365,0.0018663406,-0.023345947,0.0034065247,-0.0178833,0.010955811,-0.018554688,0.021224976,-0.007286072,0.01209259,-0.0101623535,0.0020866394,-0.020065308,0.014152527,0.08282471,0.020095825,0.01864624,-0.009208679,-0.011627197,0.014572144,0.025131226,-0.026885986,0.019424438,-0.025558472,0.038330078,-0.013908386,-0.00018298626,0.0206604,0.024230957,-0.037231445,-0.053588867,0.009529114,0.0090789795,-0.0049552917,-0.07055664,-0.034057617,-0.05557251,-0.013244629,-0.011238098,-0.01360321,0.002986908,-0.0049934387,-0.014793396,-0.09552002,0.0047721863,0.05441284,0.024475098,0.022079468,-0.023605347,0.02470398,0.03250122,-0.026428223,-0.024368286,0.02368164,-0.041900635,-0.023498535,-0.021026611,0.042541504,-0.020950317,-0.014434814,0.010620117,0.004096985,0.0138549805,0.00592041,0.0013780594,-0.02166748,0.010238647,-0.001572609,0.013191223,-0.01184845,-0.019927979,0.04095459,-0.050750732,0.037841797,0.003162384,-0.008232117,0.0074424744,0.03515625,0.023361206,-0.038360596,-0.011756897,0.011604309,-0.006801605,0.041748047,-0.02420044,0.056030273,0.020233154,0.005493164,-0.003873825,-0.010406494,-0.00894165,-0.035705566,-0.029251099,0.02645874,0.017822266,-0.00020563602,-0.016708374,-0.014442444,0.0008764267,0.009117126,0.021011353,-0.011657715,-0.0001540184,-0.025619507,0.008560181,0.022598267,0.009361267,0.0025043488,0.022109985,0.019180298,0.043670654,-0.00831604,-0.020233154,0.011726379,0.03982544,-0.0067214966,-0.00019145012,0.011619568,0.015060425,0.01727295,0.022476196,0.016159058,-0.036621094,-0.016555786,-0.018066406,-0.0058898926,-0.000039875507,0.0025463104,0.0012378693,0.004863739,-0.0010519028,0.003080368,-0.028945923,-0.013923645,-0.02722168,-0.048706055,0.004825592,-0.014984131,0.012207031,0.02671814,0.010818481,0.024383545,-0.0010948181,0.030334473,-0.0017766953,0.00006747246,0.04321289,0.027938843,0.014930725,-0.018951416,0.0025482178,-0.013534546,-0.011993408,0.017471313,-0.00014805794,0.015960693,0.020370483,-0.017791748,0.0047798157,-0.0022907257,0.027297974,-0.0035533905,0.0039520264,-0.006515503,-0.0009083748,-0.012710571,0.04144287,-0.058044434,0.029205322,0.018234253,-0.0025196075,0.007621765,-0.014831543,-0.012329102,0.013534546,0.0040512085,-0.0034637451,0.031280518,-0.004032135,0.035369873,-0.006942749,-0.027023315,-0.003030777,-0.042144775,-0.019866943,0.0079193115,-0.016540527,-0.008087158,0.005844116,-0.03668213,0.02848816,-0.023925781,0.006298065,0.0015954971,0.0050201416,-0.022064209,-0.008155823,0.004470825,-0.026657104,-0.021453857,-0.005580902,-0.018127441,0.050231934,0.030715942,0.011199951,0.025543213,0.006111145,-0.0040245056,-0.023956299,-0.02229309,0.003540039,-0.015823364,0.01902771,-0.034576416,0.04940796,0.043029785,0.003206253,0.0496521,0.038848877,0.03955078,-0.010513306,0.018173218,-0.020370483,0.018081665,-0.010871887,0.011177063,-0.003829956,0.031829834,-0.020263672,0.017120361,0.008155823,0.020950317,-0.03363037,0.030075073,0.07751465,0.010925293,0.000579834,0.031799316,-0.0048599243,-0.011062622,-0.014572144,-0.0019779205,0.05496216,-0.0016050339,0.03012085,0.047424316,0.013961792,0.00088119507,0.011077881,-0.012619019,-0.01574707,0.057434082,0.026107788,-0.018249512,0.009315491,-0.015457153,0.00012409687,-0.034973145,-0.015975952,0.009376526,-0.0028800964,0.024673462,0.005470276,-0.021652222,-0.0049476624,0.017562866,0.0013046265,0.0151901245,-0.006084442,0.017669678,0.02758789,0.0032444,0.009162903,-0.00026726723,0.0035820007,-0.027404785,-0.021102905,0.016433716,0.031066895,-0.015281677,0.0028381348,0.021499634,0.029663086,0.04006958,0.03579712,-0.010261536,0.00025486946,0.026351929,0.0022411346,-0.0061187744,0.032806396,0.02470398,0.0065689087,0.035583496,0.050231934,0.035980225,-0.032165527,0.007030487,-0.0034809113,0.0019893646,-0.018005371,-0.011390686,0.02166748,-0.009468079,0.01676941,0.0061187744,-0.02130127,0.017990112,0.019439697,0.00579834,-0.020187378,-0.013679504,0.014701843,-0.017288208,0.011192322,-0.0014419556,-0.00598526,0.02960205,-0.0015506744,0.006427765,-0.025787354,0.031677246,-0.0075416565,-0.017669678,-0.008255005,0.011474609,-0.06298828,0.025497437,-0.008590698,0.003129959,-0.04916382,0.0012798309,-0.0000150203705,0.0059013367,0.009437561,0.015289307,-0.010917664,-0.0073623657,0.044555664,0.03125,-0.008659363,-0.015853882,-0.020477295,0.01751709,0.027786255,0.007041931,-0.009132385,-0.0036563873,0.01360321,0.011169434,-0.004840851,0.010406494,0.0018663406,-0.012763977,-0.028427124,0.021774292,0.029251099,0.017349243,0.039886475,-0.030151367,-0.014755249,-0.0018758774,0.022613525,-0.0015573502,-0.023605347,-0.0027427673,0.02267456,-0.01486969,0.0690918,0.047332764,-0.0057373047,0.030944824,-0.016143799,-0.025772095,0.0033035278,-0.01852417,0.012229919,-0.020706177,0.005832672,0.0020713806,0.028411865,-0.026000977,-0.030303955,-0.0027694702,-0.029144287,-0.014945984,-0.02861023,0.014282227,-0.010528564,0.008605957,0.03756714,0.014884949,-0.012207031,0.067871094,-0.028839111,0.049224854,-0.0011873245,-0.0036888123,0.049865723,0.025497437,0.0340271,0.008850098,0.0057029724,-0.021118164,0.024246216,0.021591187,0.01184845,-0.0033931732,0.009391785,-0.013442993,0.034240723,0.0017929077,0.038024902,-0.00039720535,-0.01725769,0.0049362183,-0.021026611,-0.023025513,-0.009857178,-0.003036499,0.022369385,0.037994385,-0.026794434,-0.018249512,-0.029510498,-0.020584106,0.025863647,-0.01663208,-0.001625061,-0.0076026917,-0.007408142,0.021438599,-0.015586853,-0.0034828186,0.01663208,0.039733887,-0.05569458,-0.015991211,0.0037231445,0.01687622,-0.029586792,0.022567749,0.02166748,-0.011558533,0.0047302246,0.032348633,-0.004219055,0.041900635,-0.0046653748,0.047088623,0.014533997,-0.0039749146,-0.022064209,0.0039253235,0.010009766,-0.017868042,0.009674072,0.034118652,-0.01398468,-0.0055236816,-0.014526367,-0.01826477,-0.008766174,0.0018262863,-0.0118255615,0.0022697449,0.0031356812,-0.02166748,0.015174866,0.016540527,-0.0061187744,-0.0102005005,0.010971069,-0.015777588,0.008773804,0.040252686,0.009590149,-0.05026245,-0.005027771,0.012138367,-0.012870789,-0.016036987,-0.029403687,-0.005279541,-0.042907715,0.010543823,0.011917114,0.021972656,-0.00047135353,-0.0231781,-0.0053749084,0.009338379,0.011116028,0.04437256,0.0076141357,0.001039505,0.0067863464,-0.0051612854,0.004650116,-0.009918213,-0.0066223145,0.01007843,0.01966858,0.000070512295,-0.02015686,0.020217896,0.0034389496,0.0015392303,0.017868042,0.0028381348,0.024154663,-0.02999878,-0.022628784,0.0054740906,0.014572144,-0.011207581,-0.022613525,-0.013458252,0.025039673,0.052001953,-0.008224487,-0.0028362274,0.012756348,0.026428223,0.017105103,0.031982422,0.028305054,0.042022705,0.021118164,-0.002439499,-0.010360718,0.01739502,-0.021362305,-0.02796936,0.021316528,-0.022598267,-0.022613525,0.0345459,0.017501831,0.009613037,-0.023605347,-0.015655518,-0.013839722,-0.018188477,0.014755249,-0.0032978058,0.015838623,-0.04446411,-0.023834229,0.02192688,-0.011817932,-0.01966858,-0.014762878,-0.020065308,-0.021530151,-0.049438477,0.00472641,-0.009796143,-0.0047569275,-0.005180359,0.012321472,0.018585205,0.039398193,0.0031394958,-0.012809753,-0.0052490234,0.042999268,0.021270752,0.02468872,0.026000977,-0.031173706,-0.026870728,-0.020706177,-0.0028705597,-0.0126571655,0.0289917,-0.016952515,0.028808594,0.017120361,-0.029769897,0.005958557,0.0026302338,-0.003036499,-0.010887146,-0.033996582,-0.012886047,0.006389618,0.03289795,-0.006717682,-0.0062713623,0.04421997,-0.021072388,-0.015563965,0.035003662,0.022125244,0.0039787292,0.04147339,-0.019424438,-0.011528015,-0.020233154,0.00491333,-0.0118255615,0.0076828003,0.0020484924,0.029144287,0.0211792,0.012680054,0.016220093,-0.012939453,0.0058631897,0.042938232,0.019012451,-0.0035705566,0.027816772,-0.0005569458,-0.00018596649,-0.016067505,0.004119873,0.02494812,0.027893066,0.015670776,0.007408142,-0.0069274902,0.009231567,-0.010543823,0.0064811707,0.034210205,-0.017471313,-0.03869629,-0.010513306,-0.021774292,0.012336731,-0.012794495,0.00036168098,-0.009651184,0.008216858,-0.0017595291,-0.036621094,-0.011634827,0.016616821,0.0007624626,-0.011917114,-0.010559082,-0.0063819885,0.034057617,-0.029846191,0.011474609,-0.062683105,-0.027526855,-0.02658081,-0.017425537,0.024963379,-0.013160706,-0.005592346,0.00047659874,-0.004558563,-0.010757446,0.02079773,0.0065689087,-0.015586853,-0.01676941,0.0071792603,0.034606934,-0.0029125214,0.014442444,-0.0053596497,0.0047950745,-0.00041294098,-0.0046043396,0.0101623535,-0.01374054,0.034576416,0.005592346,-0.0049552917,0.019760132,-0.006072998,0.020492554,-0.010070801,-0.0152282715,0.001953125,-0.014472961,0.033691406,-0.0054512024,-0.01979065,0.011154175,-0.011306763,-0.04901123,0.008239746,0.014587402,0.023269653,-0.010513306,0.047698975,-0.011146545,-0.020904541,0.027664185,0.010116577,-0.026763916,0.0050582886,0.0231781,-0.008636475,0.001996994,-0.017684937,-0.014602661,-0.023269653,-0.012199402,0.010406494,-0.00831604,-0.015899658,0.0105896,0.025558472,0.030792236,0.004776001,0.02204895,0.030151367,0.0019435883,0.038208008,0.0048980713,0.056640625,-0.00079774857,-0.044403076,0.0057258606,-0.005794525,-0.026275635,0.019424438,-0.0057640076,0.0062828064,-0.024627686,-0.0072288513,0.013641357,0.026245117,-0.0008955002,0.017105103,-0.023452759,-0.006641388,-0.020080566,0.009590149,-0.024139404,0.004207611,0.032165527,0.028320312,0.007709503,-0.021316528,-0.03173828,0.0107421875,0.030349731,-0.01096344,-0.03189087,-0.0020923615,0.019195557,0.0016899109,0.018875122,-0.0049552917,-0.0335083,-0.024520874,-0.013404846,0.006439209,0.001247406,-0.025146484,0.011924744,0.011886597,-0.019866943,0.00026392937,0.017822266,0.003955841,-0.00022614002,0.0039978027,-0.002319336,0.024871826,0.03225708,-0.027359009,0.013832092,0.01361084,-0.04623413,0.06137085,-0.013587952,0.026382446,-0.016525269,0.00024354458,-0.025100708,-0.013160706,-0.012077332,-0.0010662079],"createdAt":"2026-04-18T18:44:00.089Z","updatedAt":"2026-04-24T16:02:33.954Z","lastSeenAt":"2026-04-24T16:02:33.954Z","tsv":"'/api/v1/cards/87/transactions':42,92 '/cards/87/transactions':206 '0.02':11,26,77,135 '000':122 '0x8335':127 '20':121 '2913':128 '402':217 '402 payment endpoint' '6':131 'Base network API' 'USDC pay-per-call' 'accept':114 'access':99,156 'across':167 'actual':208 'address':147 'advertis':155 'ai/ml':67 'analyt':66 'api':63,98,149,175 'base':9,24,85,123,130 'base-network' 'behind':43 'broader':53 'call':62 'card':5,20,38 'card transactions API' 'card-transact':4,19,37 'card-transactions' 'challeng':47,111,218 'charg':118 'confirm':112 'connect':184 'content':190 'data':65,70,204 'decim':132 'describ':94 'doc':174 'document':103,166,221 'dozen':57 'endpoint':7,22,32,89,211 'equal':134 'exact':142 'explan':201 'expos':35 'extrem':171 'finance/web3':69 'gate':3,18,158 'infer':68 'infrastructur':72 'key':150 'like':235 'limit':153 'list':90 'live':213 'look':234 'lowpaymentfee' 'lowpaymentfee.com':34 'made':138 'micropay':165 'network':86 'no-api-key' 'offer':56 'openapi':194 'page':179 'part':50 'pay':10,25,60 'pay-per-cal':59 'pay-per-request' 'payload':226 'payment':46,136 'payto':146 'per':12,27,61,78,163 'per-request':162 'platform':54 'post':115,228 'premium':97 'price':75,176 'prompt':186 'proper':216 'pure':159 'rate':152 'readm':178 'render':181 'request':13,28,79,105,116,164 'request/response':197 'resourc':40,207 'respons':107,232 'return':209,214 'schema':108,198 'scheme':143 'settl':80 'site':169 'span':64 'spec':195 'specif':88 'structur':233 'substant':189 'thin':172 'transact':6,21,39 'unclear':224 'unit':124 'usdc':15,30,82,126 'usdc-micropayment' 'util':73 'via':139 'wallet':185 'without':220 'x402':2,17,45,110,141 'x402 micropayment API' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"69cece0a-6906-4f89-8113-637135593405","listingId":"e18316ec-22c7-43fc-b5f4-c4b7d30c7d5e","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/87/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:00.089Z"}],"sources":[{"listingId":"e18316ec-22c7-43fc-b5f4-c4b7d30c7d5e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/87/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:00.089Z","lastSeenAt":"2026-04-24T16:02:33.954Z"}],"details":{"listingId":"e18316ec-22c7-43fc-b5f4-c4b7d30c7d5e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/87/transactions \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/cards/87/transactions"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/cards/87/transactions"}],"useCases":["Retrieving card transaction data via a single micropayment","Integrating pay-per-call transaction lookups into agent workflows","Accessing financial card data without API key registration"],"bestFor":["Agents that can settle x402 USDC payments on Base","Developers wanting keyless, pay-per-use card transaction data","Prototyping micropayment-gated API integrations"],"notFor":["Production use requiring documented request/response schemas","High-volume batch processing where per-call pricing is inefficient","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:25.63Z"},"updatedAt":"2026-04-24T16:02:33.954Z"}}