{"id":"3dbce636-8534-410e-a703-a2db34db40b9","shortId":"aJUNXK","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 provides access to a card transactions resource at `/api/v1/cards/69/transactions` via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments on the Base network.\n\nThe specific endpoint is labeled \"Premium API Access\" and accepts HTTP POST requests. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base using the x402 \"exact\" scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. No API keys are needed; callers authenticate purely via the X-PAYMENT header containing a valid x402 payment proof. The platform advertises no rate limits and instant access.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/cards/69/transactions` endpoint actually returns or what input it expects beyond being a POST endpoint. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the lack of documentation makes it difficult to determine the actual functionality or expected request body format.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","http-post","card-transactions","micropayment-api","no-api-key"],"categories":["finance","payments"],"synonyms":["card transactions API","x402 micropayment endpoint","USDC pay-per-call API","Base network API","lowpaymentfee","card data endpoint","402 payment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided; the expected POST body and response format are unknown","The purpose of '/api/v1/cards/69/transactions' is unclear — 'Premium API Access' is a generic label","The platform lists many diverse API categories but provides no evidence of actual functionality behind any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/69/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/69/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live with a valid x402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint actually does or accepts. The docs pages all render only 'Connect wallet'. The listing is essentially a stub.","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":"2026-04-19T03:05:10.121Z","embedding":[-0.0513916,-0.030410767,0.042022705,0.004787445,0.022506714,-0.034973145,-0.03717041,0.033233643,0.07336426,-0.07055664,0.02760315,-0.034729004,-0.05908203,-0.015823364,-0.03274536,-0.005634308,-0.025497437,0.018325806,-0.025939941,0.034973145,0.04257202,-0.034088135,-0.0118637085,0.015792847,-0.0029296875,-0.0066184998,-0.0020885468,-0.006340027,-0.01411438,-0.05392456,0.043304443,-0.017700195,-0.013320923,0.002199173,-0.0072784424,0.004310608,0.0010328293,0.03878784,0.040985107,-0.030654907,0.008872986,-0.055419922,-0.0051727295,-0.005756378,-0.035980225,-0.0069084167,0.0076446533,-0.049438477,-0.0021781921,-0.004310608,-0.047668457,-0.017227173,-0.012908936,0.030212402,0.03491211,0.015327454,-0.0028514862,-0.031311035,0.015640259,0.016738892,-0.017242432,-0.05581665,-0.0046691895,-0.018371582,0.0008239746,0.03918457,-0.02973938,0.050048828,0.0024261475,0.07104492,0.033294678,0.030059814,0.022384644,0.02507019,0.020339966,0.0023059845,-0.015342712,0.059387207,-0.019729614,-0.024551392,-0.019805908,-0.008140564,-0.06896973,-0.013839722,-0.01499176,-0.069885254,0.0021038055,-0.0043792725,-0.013038635,0.029342651,-0.07678223,-0.012825012,-0.002588272,0.015510559,-0.019882202,-0.012649536,-0.03942871,-0.0037078857,-0.016433716,0.023376465,0.034606934,-0.030456543,0.047576904,0.011787415,0.05834961,0.013343811,0.00094890594,0.033172607,-0.0030574799,-0.014717102,-0.026138306,0.003250122,-0.0024547577,-0.0006337166,0.027801514,0.007713318,-0.009063721,0.028182983,-0.014320374,0.031219482,-0.045196533,0.057739258,0.017654419,-0.02619934,0.020614624,-0.040161133,-0.0016336441,-0.00036406517,-0.043426514,-0.0054512024,0.031051636,0.01234436,0.03010559,-0.016830444,-0.016174316,0.026535034,-0.01939392,-0.008171082,-0.05407715,-0.02961731,0.022262573,-0.028442383,0.023651123,0.030029297,-0.107666016,-0.0019359589,-0.044799805,0.026733398,-0.038360596,0.00037622452,0.011436462,0.026870728,-0.015106201,-0.023498535,-0.010879517,-0.040985107,-0.012367249,0.043182373,-0.020401001,0.035461426,-0.0071754456,0.023620605,0.012245178,0.009506226,0.013366699,0.034820557,-0.017913818,-0.064819336,-0.08117676,-0.028396606,0.016418457,-0.034210205,-0.056854248,0.0021686554,-0.050567627,-0.07122803,-0.027954102,-0.018356323,-0.028778076,-0.03527832,-0.016067505,-0.042266846,0.0020446777,-0.009017944,-0.059631348,-0.02218628,-0.04888916,0.050964355,0.0074157715,-0.00022685528,0.014915466,0.01386261,0.0435791,0.02532959,0.013961792,-0.032318115,0.009262085,-0.009147644,0.03881836,-0.0030078888,0.008850098,-0.04144287,0.008491516,0.08544922,-0.0005903244,-0.02897644,0.00041270256,-0.03878784,-0.034179688,-0.0074272156,0.005302429,-0.003534317,-0.0236969,0.022094727,-0.015991211,-0.024902344,0.0069503784,0.026443481,0.02519226,0.05908203,0.0072288513,0.0030231476,0.023101807,0.010009766,-0.04043579,0.05255127,0.046966553,0.02659607,-0.034973145,-0.05596924,0.019485474,0.07232666,-0.018600464,-0.007484436,-0.007987976,0.023956299,-0.010169983,0.004638672,0.02607727,0.004688263,-0.025177002,-0.03729248,-0.0071258545,0.016433716,0.010269165,-0.03717041,-0.047454834,-0.078186035,0.06036377,0.05105591,0.039215088,-0.020736694,-0.0121154785,-0.018554688,-0.012901306,-0.049102783,0.032928467,0.06262207,-0.030181885,0.0046691895,0.05279541,-0.002023697,-0.026916504,-0.030456543,-0.027679443,-0.015304565,-0.04421997,0.003255844,-0.029388428,0.01638794,0.0079574585,0.03451538,0.0463562,0.005203247,-0.050750732,-0.03567505,-0.018051147,0.009880066,-0.01828003,-0.015151978,0.018676758,0.014984131,0.028915405,0.010246277,0.013305664,-0.0024356842,0.011352539,0.0014028549,0.024246216,-0.02217102,-0.04208374,0.025009155,-0.021392822,-0.063964844,0.008758545,-0.005268097,0.046447754,-0.03756714,0.037384033,-0.03274536,-0.0042152405,0.044708252,-0.025772095,-0.035888672,-0.0068206787,0.01637268,0.046295166,0.033081055,0.009277344,0.0060424805,-0.03488159,0.053588867,-0.001086235,-0.008049011,0.010597229,0.037841797,0.014915466,-0.0027046204,-0.05114746,-0.054016113,-0.014816284,-0.01423645,0.038391113,-0.02468872,0.03918457,-0.029067993,-0.025344849,-0.037963867,-0.012016296,-0.036315918,0.01449585,-0.02420044,-0.0046920776,-0.02142334,-0.02923584,0.023590088,0.0034751892,-0.007205963,-0.013458252,0.055999756,0.024291992,-0.004207611,-0.0115356445,0.0019302368,-0.029632568,0.0044937134,0.016204834,0.025772095,0.03643799,0.021850586,-0.033569336,0.01789856,0.007583618,0.006198883,0.026138306,0.0004479885,-0.010253906,-0.03427124,-0.031082153,-0.028549194,-0.0010995865,0.02268982,0.0006709099,0.009353638,0.060577393,0.017333984,-0.017196655,-0.0129852295,0.012084961,-0.06274414,-0.006690979,0.021240234,0.0051345825,-0.028152466,0.006504059,-0.017684937,-0.006023407,0.03933716,0.018463135,0.024627686,0.06604004,0.03564453,0.020858765,0.02998352,0.0012521744,0.03286743,-0.01399231,-0.01991272,-0.015579224,-0.01637268,0.007904053,0.000050842762,-0.041992188,-0.061553955,0.04724121,0.05279541,0.07128906,0.03302002,-0.0072746277,0.011650085,-0.0041122437,0.01638794,-0.006931305,-0.022491455,-0.026443481,-0.031097412,0.021957397,0.0036735535,-0.0104522705,-0.009742737,0.026992798,0.010688782,0.010269165,-0.026016235,0.04510498,-0.01374054,-0.023544312,0.028900146,0.011123657,0.014175415,0.051452637,-0.039093018,0.013336182,0.018569946,-0.034942627,-0.016952515,0.01928711,-0.0036296844,-0.02973938,-0.038024902,-0.04437256,0.008491516,0.008506775,-0.058044434,0.015701294,0.015541077,0.051849365,-0.005126953,-0.022399902,-0.030181885,0.0037384033,-0.014038086,-0.030975342,0.0005455017,-0.026245117,0.01826477,0.05178833,-0.029373169,0.034484863,0.0037574768,0.010253906,0.012908936,0.010299683,-0.013496399,-0.009384155,-0.03488159,0.025146484,0.0027313232,0.008956909,0.015083313,0.025817871,0.0061454773,0.010879517,0.031982422,0.0087509155,0.0038967133,-0.049743652,0.020004272,-0.029464722,-0.0068206787,0.013793945,-0.01374054,0.004535675,-0.0074539185,-0.016555786,-0.015945435,0.0019779205,-0.000113248825,-0.0021476746,0.05090332,-0.042816162,-0.034484863,-0.07751465,-0.014221191,0.042877197,0.0597229,0.013244629,-0.0052223206,-0.031829834,0.0015096664,0.029418945,-0.0015659332,0.0014238358,-0.012702942,-0.022369385,0.003276825,-0.027877808,-0.042266846,-0.002286911,0.04156494,0.004070282,-0.0029201508,0.023956299,0.0033493042,0.003168106,0.0029506683,-0.008666992,0.029174805,0.0013389587,0.0005683899,-0.010009766,0.043060303,-0.0012025833,-0.052001953,-0.04425049,0.03829956,-0.018753052,0.055419922,-0.043182373,-0.014907837,-0.010948181,0.017044067,0.016647339,-0.011245728,-0.010284424,0.002708435,-0.03439331,-0.056762695,0.031021118,0.0034732819,0.018875122,0.011413574,0.0063438416,0.032348633,-0.00078725815,0.0045204163,0.015342712,-0.037902832,-0.01940918,-0.05795288,-0.025604248,-0.021774292,-0.0043525696,-0.03353882,0.014907837,-0.0077400208,0.008300781,0.0062675476,-0.022750854,0.030288696,-0.0008673668,0.0044441223,0.012359619,0.016021729,0.010231018,0.018829346,0.012489319,-0.040985107,0.0023288727,0.006500244,-0.0008301735,-0.016220093,0.02671814,0.023376465,-0.030853271,0.012382507,-0.0037460327,-0.019897461,-0.02192688,-0.028198242,0.004558563,0.035308838,0.017944336,-0.019134521,0.02557373,0.01838684,-0.03286743,-0.032989502,0.013954163,0.03225708,-0.0435791,0.009292603,0.03048706,0.0569458,-0.036590576,0.0071372986,0.0113220215,0.04067993,0.021209717,-0.009635925,0.0016584396,0.031707764,-0.01448822,0.009361267,-0.00051546097,-0.0006046295,-0.0038909912,0.008590698,0.02607727,0.018676758,0.016601562,-0.022964478,-0.03793335,-0.00018823147,0.0035743713,-0.016296387,0.023223877,0.023254395,0.03250122,-0.0041618347,0.034484863,0.03717041,-0.013504028,-0.016159058,-0.0063171387,0.029022217,-0.016311646,-0.0062332153,0.01399231,0.007259369,0.036987305,-0.07598877,-0.01701355,0.0059318542,0.020584106,0.0010442734,-0.05987549,-0.03463745,-0.01486969,0.014511108,-0.0025424957,0.0020580292,0.02810669,0.001578331,-0.013023376,0.023757935,0.0026168823,-0.00052690506,-0.00010955334,-0.051483154,-0.032318115,0.00031232834,-0.00052928925,-0.0132369995,0.015403748,-0.0158844,-0.014091492,0.013084412,-0.046081543,0.009246826,-0.03717041,0.011482239,0.034606934,-0.015640259,0.016998291,-0.0143585205,-0.014915466,-0.002779007,0.0143585205,0.030029297,-0.034210205,0.030883789,-0.021865845,-0.0018815994,-0.0040245056,0.020477295,0.02911377,0.026473999,-0.012046814,0.0284729,-0.0368042,0.03262329,-0.036834717,0.0037288666,-0.001452446,-0.020477295,-0.0025253296,-0.022720337,-0.011138916,0.040893555,-0.008850098,-0.0047721863,-0.03994751,-0.019195557,-0.0057754517,-0.05279541,0.020431519,0.011650085,0.040283203,-0.02998352,0.018371582,-0.004558563,-0.0012702942,0.004096985,-0.0043640137,-0.014854431,0.0146102905,0.0138168335,0.012611389,-0.037506104,-0.015823364,-0.005607605,-0.002046585,-0.056549072,-0.034423828,-0.013679504,0.036132812,-0.007888794,-0.009963989,-0.03277588,-0.004611969,0.004508972,-0.039398193,0.02029419,-0.004261017,0.030883789,-0.005466461,-0.010375977,0.0023059845,0.014122009,-0.00983429,0.045928955,-0.0032653809,-0.012145996,-0.054870605,0.003955841,0.01524353,0.026412964,0.0009937286,-0.029037476,0.008705139,-0.033172607,-0.04989624,-0.008087158,-0.011749268,0.00039815903,-0.011566162,-0.02204895,-0.04852295,-0.00793457,-0.03640747,0.00032544136,0.016189575,0.011947632,0.018753052,-0.00036644936,0.0138168335,-0.026123047,-0.043945312,-0.02078247,0.011688232,0.008918762,0.00945282,0.009346008,0.06185913,0.0007200241,-0.025009155,-0.0062675476,-0.01889038,0.015007019,-0.025405884,0.019546509,0.005458832,0.014060974,-0.012649536,0.0006685257,-0.036895752,0.0060043335,0.066833496,0.016693115,0.0039367676,-0.005432129,-0.00023210049,0.018112183,0.029586792,-0.024291992,0.006916046,-0.021835327,0.040161133,-0.01966858,0.004470825,0.010765076,0.033721924,-0.01776123,-0.059326172,0.005306244,-0.0007610321,-0.0059890747,-0.06829834,-0.031173706,-0.061523438,-0.002008438,0.0007724762,-0.00945282,0.00819397,-0.0009908676,-0.010536194,-0.07739258,-0.0032653809,0.059783936,0.02178955,0.024627686,-0.026412964,0.03527832,0.04260254,-0.021347046,-0.027999878,0.020599365,-0.035064697,-0.01108551,-0.03488159,0.042816162,-0.023834229,-0.024490356,0.023498535,0.008483887,0.018951416,0.00944519,0.004016876,-0.01876831,-0.009407043,-0.0027332306,0.029571533,-0.00080156326,-0.016601562,0.041778564,-0.024307251,0.03744507,-0.0046463013,-0.014472961,0.0034980774,0.03363037,0.030334473,-0.0413208,0.0044059753,0.011421204,-0.00091552734,0.05114746,-0.014518738,0.04763794,0.023773193,0.013839722,-0.0014295578,-0.013496399,-0.011657715,-0.039611816,-0.023620605,0.023880005,0.009902954,0.009849548,-0.0043907166,-0.0049476624,0.00040078163,0.00705719,0.022201538,-0.0051574707,-0.009765625,-0.030227661,0.017669678,0.015716553,0.005809784,0.005432129,0.018341064,0.018798828,0.049682617,-0.006816864,-0.037109375,0.01309967,0.04168701,-0.0043907166,0.0067596436,0.015930176,0.016723633,0.018081665,0.029388428,0.016082764,-0.042999268,-0.030975342,-0.017730713,-0.005844116,-0.008544922,0.0048561096,-0.012672424,0.013916016,-0.0062179565,0.0051231384,-0.032989502,-0.0018262863,-0.021606445,-0.039123535,0.0050354004,-0.018310547,0.0118637085,0.021850586,0.00055503845,0.030960083,-0.007522583,0.03741455,0.002313614,0.0026988983,0.02545166,0.03390503,0.0061454773,-0.012611389,-0.012207031,-0.016220093,-0.014892578,0.015045166,0.0065689087,0.026641846,0.018829346,-0.023223877,0.0075149536,-0.0003373623,0.03491211,0.0014095306,0.011047363,-0.0076828003,0.008666992,-0.011138916,0.039367676,-0.055358887,0.019348145,0.020187378,0.01159668,0.014587402,-0.0077819824,-0.02420044,0.023651123,-0.0031547546,-0.0064735413,0.03375244,-0.005001068,0.032287598,-0.008422852,-0.025802612,0.0007982254,-0.03265381,-0.018035889,0.00057172775,-0.007045746,-0.014556885,0.00705719,-0.034210205,0.02079773,-0.017868042,0.010482788,-0.007789612,0.020507812,-0.02458191,-0.018676758,-0.0011205673,-0.031799316,-0.018432617,-0.0107040405,-0.014755249,0.04611206,0.035064697,-0.00043678284,0.017211914,0.004032135,0.009246826,-0.025268555,-0.031585693,0.012641907,-0.007293701,0.016403198,-0.02923584,0.05029297,0.05718994,0.011161804,0.051086426,0.032836914,0.039642334,-0.0049438477,0.0012874603,-0.03552246,0.02822876,-0.028625488,0.0020580292,0.0067214966,0.030578613,-0.01876831,0.021850586,0.003540039,0.030532837,-0.04095459,0.030929565,0.068237305,0.027755737,0.0044670105,0.026641846,-0.016235352,0.0034809113,-0.011604309,0.0079956055,0.06774902,-0.0018568039,0.035003662,0.035827637,0.018951416,0.012298584,0.018112183,-0.021453857,-0.012084961,0.05734253,0.021392822,-0.017181396,0.007835388,-0.017730713,0.00022339821,-0.04458618,-0.020599365,-0.0046043396,-0.003850937,0.025497437,0.010726929,-0.01725769,-0.00007802248,0.019485474,0.0001398325,0.013404846,-0.008049011,0.015312195,0.03414917,-0.00084638596,0.019515991,-0.008460999,0.022399902,-0.012023926,-0.018844604,0.013137817,0.026489258,-0.001739502,0.0048217773,0.026870728,0.014175415,0.03918457,0.04977417,-0.014434814,0.006916046,0.033416748,0.0002951622,-0.00617218,0.027664185,0.031021118,0.017303467,0.042907715,0.048461914,0.035369873,-0.027008057,0.015052795,-0.011154175,-0.013938904,-0.016662598,-0.009490967,0.018295288,-0.010002136,0.03112793,0.015602112,-0.029266357,0.02760315,0.024780273,0.008544922,-0.0069007874,-0.0021953583,0.011787415,-0.02229309,0.013702393,0.0099105835,-0.013923645,0.028549194,-0.004547119,0.023345947,-0.02810669,0.031829834,0.00036001205,-0.010620117,-0.012435913,0.0042495728,-0.05215454,0.023330688,-0.012191772,0.0002503395,-0.05609131,0.00029921532,0.00052022934,-0.008621216,0.009490967,0.00434494,-0.0088272095,-0.0024967194,0.042907715,0.013008118,-0.0132369995,-0.015144348,-0.014289856,0.031433105,0.026412964,0.015586853,0.0032176971,-0.0052986145,0.013442993,0.013404846,-0.0030822754,0.008605957,0.005420685,-0.005874634,-0.032684326,0.022491455,0.037261963,0.0158844,0.042297363,-0.018661499,-0.016799927,-0.0054130554,0.029907227,0.00945282,-0.026168823,-0.011787415,0.018478394,-0.019927979,0.06311035,0.049713135,-0.013893127,0.017791748,-0.016036987,-0.015716553,-0.0021381378,-0.010505676,0.001534462,-0.01637268,0.008453369,0.0009031296,0.030853271,-0.025604248,-0.039489746,-0.0043411255,-0.016723633,-0.018035889,-0.020996094,0.015823364,-0.003540039,0.012519836,0.03652954,0.0049209595,-0.01260376,0.060760498,-0.029037476,0.03378296,-0.004650116,-0.005432129,0.058441162,0.027114868,0.03768921,0.005619049,0.0129470825,-0.0143966675,0.017837524,0.032409668,0.006652832,0.004047394,0.0032901764,-0.019332886,0.030883789,0.00036096573,0.033569336,0.002456665,-0.019683838,0.004802704,-0.010147095,-0.017486572,-0.015029907,0.001080513,0.02229309,0.04269409,-0.028442383,-0.017333984,-0.02368164,-0.022827148,0.023834229,-0.012245178,-0.0019283295,-0.007873535,-0.02267456,0.020111084,-0.025802612,-0.007881165,0.010543823,0.037902832,-0.047973633,-0.012229919,-0.00027227402,0.0345459,-0.028747559,0.019439697,0.031158447,0.0026569366,0.012825012,0.035614014,-0.0062026978,0.04324341,-0.00041890144,0.044769287,0.01461792,-0.0059432983,-0.015579224,0.0039138794,0.019805908,-0.03112793,0.00233078,0.04437256,-0.019882202,0.012840271,-0.012062073,-0.01033783,0.0025577545,0.01158905,-0.0030612946,-0.00018882751,0.0014619827,-0.01777649,0.014656067,0.0030097961,-0.007423401,-0.009475708,0.020568848,-0.015426636,0.005756378,0.04244995,0.023620605,-0.053527832,0.0016031265,0.012306213,-0.0041770935,-0.009063721,-0.027633667,-0.0101623535,-0.042388916,0.014060974,0.007293701,0.021240234,0.0030784607,-0.031311035,-0.0056762695,0.010169983,0.013160706,0.03778076,0.008552551,-0.011817932,0.0046577454,-0.00409317,0.0042877197,-0.011459351,-0.008369446,0.016937256,0.019088745,-0.009490967,-0.016418457,0.02494812,0.0031528473,0.007255554,0.012710571,0.0046424866,0.01550293,-0.020217896,-0.028717041,0.0070762634,0.020935059,0.0010547638,-0.023376465,-0.017242432,0.01965332,0.054473877,-0.009162903,-0.00705719,0.0115737915,0.012771606,0.021316528,0.02406311,0.028182983,0.044158936,0.02381897,0.003894806,-0.011764526,0.018188477,-0.020751953,-0.029663086,0.023010254,-0.019195557,-0.03253174,0.033599854,0.014175415,0.008743286,-0.02041626,-0.013305664,-0.01411438,-0.014854431,0.013244629,-0.005760193,0.0105896,-0.0446167,-0.018829346,0.014472961,-0.0015211105,-0.0154418945,-0.013084412,-0.02192688,-0.018753052,-0.05038452,0.017196655,-0.02053833,0.0036392212,-0.0074157715,0.00856781,0.024551392,0.0418396,0.00039887428,-0.009208679,-0.014846802,0.03778076,0.014312744,0.029373169,0.021499634,-0.0236969,-0.032043457,-0.012771606,-0.005340576,-0.00023949146,0.030380249,-0.023834229,0.031463623,0.017440796,-0.037261963,-0.00012266636,0.0077552795,-0.004890442,-0.007293701,-0.027069092,-0.0057678223,-0.003250122,0.022201538,-0.0036525726,0.012084961,0.029220581,-0.02420044,-0.025253296,0.03741455,0.023071289,-0.0035247803,0.04925537,-0.015144348,-0.009605408,-0.011367798,-0.000026881695,-0.0058250427,0.014518738,-0.0004682541,0.02180481,0.014671326,0.014350891,0.019561768,-0.009017944,0.012641907,0.0345459,0.02810669,0.00046920776,0.028579712,-0.0035743713,-0.0019893646,-0.01991272,-0.015991211,0.02986145,0.021377563,0.016357422,-0.0016756058,-0.014595032,0.010307312,-0.013793945,0.010231018,0.037872314,-0.013755798,-0.03326416,-0.009063721,-0.026809692,0.008277893,-0.015342712,0.0026836395,-0.0073051453,0.0076141357,-0.0052490234,-0.023666382,-0.01826477,0.022567749,0.014572144,-0.010444641,-0.02607727,-0.003982544,0.024169922,-0.021377563,0.016906738,-0.054626465,-0.016448975,-0.010398865,-0.011451721,0.013305664,-0.007507324,0.0115356445,-0.0006790161,-0.011154175,-0.012519836,0.02130127,0.010635376,-0.017471313,-0.006248474,0.00092077255,0.028945923,-0.0029468536,0.02017212,0.0050239563,0.008056641,0.0016832352,-0.006591797,0.01751709,-0.011062622,0.040924072,0.017028809,-0.002986908,0.019805908,-0.0022411346,0.0184021,-0.007129669,-0.0041542053,0.011291504,-0.008514404,0.034301758,-0.009307861,-0.024230957,0.009971619,-0.0138168335,-0.044281006,0.012710571,0.011161804,0.031433105,-0.020507812,0.051208496,0.0033245087,-0.01626587,0.014572144,0.00982666,-0.023666382,-0.0012731552,0.016571045,-0.009971619,-0.0056533813,-0.009681702,-0.020050049,-0.030090332,-0.026763916,-0.00040650368,-0.008178711,-0.0072364807,0.0058898926,0.033813477,0.022201538,0.011062622,0.03100586,0.03289795,0.012397766,0.0317688,0.009216309,0.04486084,0.0038967133,-0.03062439,0.0008325577,-0.0055351257,-0.010826111,0.01991272,-0.015151978,-0.0032463074,-0.022537231,-0.00894928,0.023345947,0.036590576,-0.00894928,0.015182495,-0.017425537,-0.016052246,-0.025878906,0.0055122375,-0.024169922,0.0025997162,0.03010559,0.0211792,0.009788513,-0.007751465,-0.024124146,0.0138549805,0.03326416,-0.0072288513,-0.029663086,-0.0033912659,0.016036987,-0.00017261505,-0.00009894371,-0.00043821335,-0.028121948,-0.022659302,-0.002254486,0.006137848,0.005695343,-0.01979065,0.011024475,0.0077705383,-0.020401001,-0.00137043,0.022201538,-0.0048942566,-0.010871887,0.002811432,0.0006971359,0.02508545,0.036193848,-0.020080566,0.01701355,0.020736694,-0.041534424,0.059936523,-0.021621704,0.008094788,-0.016616821,0.0019102097,-0.028244019,-0.0026931763,-0.008163452,-0.006980896],"createdAt":"2026-04-18T18:43:43.072Z","updatedAt":"2026-04-24T18:32:23.709Z","lastSeenAt":"2026-04-24T18:32:23.709Z","tsv":"'/api/v1/cards/69/transactions':41 '/cards/69/transactions':196 '0.02':10,24,127 '000':118 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':104 '20':117 '402':216 '402 payment API' '6':123 'Base network API' 'USDC pay-per-call API' 'accept':94 'access':34,92,158 'actual':198,233 'addit':179 'advertis':152 'ai':68 'amount':114 'analyt':67 'api':63,91,131,165 'authent':136 'base':8,22,83,106,119 'base-network' 'behind':78 'beyond':205 'bodi':238 'caller':135 'card':4,18,37 'card data endpoint' 'card transactions API' 'card-transactions' 'categori':64 'challeng':221 'confirm':213 'connect':174 'contain':144 'contract':103 'data':66 'decim':124 'descript':192 'detail':181 'determin':231 'difficult':229 'doc':164 'document':159,226 'endpoint':6,20,30,52,87,197,209,211 'equal':126 'exact':110 'exampl':189 'expect':204,236 'extrem':161 'financ':71 'format':239 'function':234 'gate':3,17,77 'header':143 'host':59 'http':95 'http-post' 'includ':65 'infrastructur':74 'input':202 'instant':157 'key':132 'label':89 'lack':224 'learn':70 'limit':155 'live':214 'lowpaymentfee' 'lowpaymentfee.com':32,56 'machin':69 'make':227 'mani':51 'maximum':113 'micropay':80 'micropayment-api' 'need':134 'network':84 'no-api-key' 'offer':53 'one':49 'openapi':185 'page':169 'pay':9,23 'payment':45,98,142,148 'per':11,25,128 'platform':57,151 'post':96,208 'premium':90 'price':166 'prompt':176 'proof':149 'protocol':46 'provid':33 'pure':137 'rate':154 'readm':168 'render':171 'request':12,26,97,129,237 'request/response':188 'requir':115 'resourc':39 'return':199,215 'schema':186 'scheme':111 'settl':100 'spars':162 'specif':86 'technic':180 'transact':5,19,38 'unit':120 'usdc':14,28,102,122 'usdc-settlement' 'use':107 'util':75 'valid':146,219 'varieti':61 'via':42,138 'wallet':175 'web3':72 'x':141 'x-payment':140 'x402':2,16,44,79,109,147,220 'x402 micropayment endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"6ca7457c-ce51-49b6-8a9f-8d672a191cd8","listingId":"3dbce636-8534-410e-a703-a2db34db40b9","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/69/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":"2026-04-18T18:43:43.072Z"}],"sources":[{"listingId":"3dbce636-8534-410e-a703-a2db34db40b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/69/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:43.072Z","lastSeenAt":"2026-04-24T18:32:23.709Z"}],"details":{"listingId":"3dbce636-8534-410e-a703-a2db34db40b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/69/transactions \\\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 with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDC","source_url":"https://lowpaymentfee.com/api/v1/cards/69/transactions"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/cards/69/transactions"},{"claim":"Platform advertises $0.02/request pricing, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving card transaction data via pay-per-request micropayments","Integrating x402-gated financial data into agent workflows","Accessing card transaction records without traditional API key management"],"bestFor":["Developers experimenting with x402 payment protocol integrations","Agents that need on-demand card transaction data with no subscription commitment","Low-volume consumers who prefer per-call USDC micropayments over monthly plans"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:26.503Z"},"updatedAt":"2026-04-24T18:32:23.709Z"}}