{"id":"b5647091-37d3-4561-a926-19c67db04289","shortId":"VGYbZF","kind":"x402","title":"x402-gated card-transaction endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated card-transaction endpoint on Base, paying $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com exposes a card-transactions resource at `/api/v1/cards/52/transactions` behind the x402 payment protocol. When called without payment, it returns a 402 challenge requesting USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is settled on-chain to the specified wallet address using the \"exact\" scheme, with a maximum timeout of 300 seconds.\n\nThe provider's landing page advertises a broad suite of APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02/request price point with no API keys, no rate limits, and instant access via x402 on Base.\n\nHowever, the specific endpoint being listed here (`/api/v1/cards/52/transactions`) is labeled only as \"Premium API Access\" with no further documentation about its request schema, expected input fields, or response format. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or example payloads, the exact functionality of this card-transactions endpoint remains unclear — it could relate to financial card transaction data, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base","card-transactions","pay-per-request","no-api-key"],"categories":["finance","payments"],"synonyms":["card transactions API","x402 payment endpoint","USDC micropayment API","Base network API","low fee API","pay-per-call API","card data endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all return only 'Connect wallet' with no content.","The specific purpose of /api/v1/cards/52/transactions is undocumented; 'Premium API Access' is the only description provided.","No request or response schema is available; callers cannot know what fields to send or expect back.","The endpoint path references a hardcoded card ID (52), which may indicate a demo or placeholder resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/52/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/52/transactions","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and no explanation of what the card-transactions endpoint actually returns. The docs pages are empty. 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":"2026-04-19T02:49:57.514Z","embedding":[-0.044555664,-0.03955078,0.047943115,0.001042366,0.015625,-0.025909424,-0.02684021,0.049560547,0.076049805,-0.07385254,0.033569336,-0.031982422,-0.054382324,-0.03591919,-0.022369385,-0.0011787415,-0.02494812,0.017456055,-0.028182983,0.030456543,0.03060913,-0.01889038,-0.026992798,0.021530151,-0.0047683716,-0.010818481,-0.0020580292,-0.013214111,-0.0085372925,-0.052703857,0.050048828,-0.01763916,-0.00096845627,-0.00043725967,-0.0127334595,0.0050239563,0.008666992,0.043121338,0.038116455,-0.029891968,0.016784668,-0.05331421,-0.004676819,0.0045547485,-0.025665283,-0.005760193,-0.004173279,-0.05090332,0.004184723,-0.005153656,-0.04171753,-0.011604309,-0.016082764,0.023452759,0.023361206,-0.00680542,-0.01574707,-0.033813477,0.01272583,0.017990112,-0.01171875,-0.05114746,-0.01826477,-0.0059928894,-0.002521515,0.049987793,-0.018157959,0.05871582,-0.008178711,0.078063965,0.041015625,0.0234375,0.026611328,0.023223877,0.02154541,0.0017967224,-0.027786255,0.053527832,-0.025787354,-0.023269653,-0.0055160522,-0.0054969788,-0.05633545,0.003917694,-0.025558472,-0.059631348,-0.0035171509,-0.0018625259,-0.017318726,0.019943237,-0.08734131,-0.0061798096,-0.002281189,0.006580353,-0.011985779,0.0010910034,-0.032287598,-0.009307861,-0.020019531,0.00737381,0.012886047,-0.037200928,0.03942871,0.0067977905,0.04953003,0.0021915436,0.0025405884,0.04031372,-0.015625,-0.016860962,-0.014976501,0.0104522705,-0.00920105,0.003835678,0.016448975,0.016525269,-0.02798462,0.02281189,-0.031982422,0.031097412,-0.056671143,0.05697632,0.012809753,-0.022720337,0.009231567,-0.03768921,-0.0044136047,0.0061302185,-0.037750244,-0.01612854,0.029434204,0.015670776,0.018478394,-0.01663208,-0.019561768,0.014411926,-0.017242432,0.002105713,-0.057128906,-0.03427124,0.022766113,-0.035064697,0.025741577,0.053833008,-0.10803223,0.004383087,-0.03414917,0.018051147,-0.04925537,-0.008651733,-0.00434494,0.024734497,-0.013427734,-0.02961731,-0.006378174,-0.04397583,-0.006286621,0.041656494,-0.014007568,0.029693604,-0.0062065125,0.0059127808,0.0026569366,0.01763916,0.013114929,0.025848389,-0.007865906,-0.070617676,-0.07849121,-0.028518677,0.009429932,-0.028259277,-0.062683105,0.0044937134,-0.04751587,-0.07952881,-0.028930664,-0.023483276,-0.017303467,-0.03048706,-0.007358551,-0.039489746,0.0030174255,-0.015899658,-0.051086426,-0.013153076,-0.04067993,0.06060791,0.025299072,0.011352539,0.011962891,0.019470215,0.05899048,0.022445679,0.001950264,-0.032470703,0.0126953125,-0.006248474,0.039031982,-0.0023078918,0.0105896,-0.048583984,0.021881104,0.09051514,-0.009353638,-0.020614624,0.008110046,-0.04711914,-0.029541016,0.00044631958,0.014602661,0.00022184849,-0.027191162,0.02619934,-0.03778076,-0.035888672,0.016098022,0.028930664,0.02204895,0.044769287,0.013534546,0.015571594,0.020339966,0.005432129,-0.034820557,0.040618896,0.030944824,0.018737793,-0.035217285,-0.050994873,0.016448975,0.07727051,-0.018722534,0.002521515,-0.0023536682,0.01574707,-0.015510559,0.00023400784,0.023712158,-0.007820129,-0.028961182,-0.03186035,-0.012466431,0.020065308,0.00024032593,-0.032104492,-0.050964355,-0.07775879,0.06921387,0.06149292,0.035705566,-0.011054993,-0.024017334,-0.014411926,-0.014404297,-0.059539795,0.037963867,0.07104492,-0.023773193,-0.001958847,0.043304443,-0.002439499,-0.031585693,-0.016921997,-0.02848816,-0.026473999,-0.026397705,0.0038490295,-0.036895752,0.012924194,0.011024475,0.028167725,0.032409668,-0.011672974,-0.043914795,-0.042053223,-0.008300781,0.009742737,-0.009468079,-0.0026683807,0.017700195,0.0076789856,0.021713257,-0.00037956238,0.009590149,0.008422852,0.020874023,0.004917145,0.0099487305,-0.03302002,-0.027069092,0.005744934,0.007785797,-0.06304932,0.006313324,-0.0034637451,0.059753418,-0.027114868,0.038024902,-0.017211914,0.005935669,0.03753662,-0.012901306,-0.02848816,0.010902405,0.013748169,0.04812622,0.031585693,0.011291504,0.00038456917,-0.027069092,0.046844482,-0.00674057,-0.0024299622,0.009315491,0.028884888,0.01977539,-0.0062408447,-0.044311523,-0.059326172,-0.007965088,-0.023880005,0.034698486,-0.030975342,0.050842285,-0.01625061,-0.012611389,-0.026382446,0.005645752,-0.03729248,0.007762909,-0.016830444,-0.0006046295,-0.035461426,-0.02444458,0.01776123,-0.009597778,-0.0024223328,-0.013313293,0.05984497,0.015037537,-0.0036067963,-0.03012085,-0.013587952,-0.01939392,0.009887695,0.033325195,0.029312134,0.017440796,0.029083252,-0.028549194,0.008018494,0.009246826,0.015098572,0.023880005,0.0075187683,0.0039711,-0.031555176,-0.03378296,-0.024002075,-0.011299133,0.015701294,0.005382538,0.015136719,0.06549072,0.023727417,-0.0206604,0.0012655258,0.022109985,-0.06036377,-0.0016117096,0.020568848,0.001200676,-0.04611206,0.00049448013,-0.022598267,-0.00982666,0.042388916,0.01876831,0.029663086,0.064208984,0.05038452,0.006652832,0.01423645,0.0138549805,0.021881104,-0.009338379,-0.023971558,-0.027038574,-0.010543823,0.008171082,-0.016174316,-0.04953003,-0.059295654,0.026321411,0.04345703,0.07672119,0.025817871,0.006626129,0.016418457,0.0019216537,0.016143799,-0.016143799,-0.030349731,-0.033050537,-0.019241333,0.02456665,-0.0062332153,-0.012496948,-0.018661499,0.034088135,0.012962341,0.0098724365,-0.010665894,0.05154419,-0.018096924,-0.021347046,0.020019531,0.010421753,0.02558899,0.05807495,-0.032073975,0.017807007,0.020904541,-0.03475952,-0.0013628006,0.042755127,-0.004470825,-0.016830444,-0.044281006,-0.038726807,0.019561768,0.005584717,-0.060455322,0.03933716,0.002866745,0.043914795,0.009765625,-0.022232056,-0.033081055,0.0013818741,-0.01713562,-0.03918457,0.008804321,-0.028625488,0.025726318,0.05407715,-0.03253174,0.023406982,-0.020751953,-0.0039596558,0.022476196,0.0033416748,-0.0041999817,-0.011253357,-0.042419434,0.036346436,0.016021729,0.016021729,0.020568848,0.031204224,0.012634277,0.012031555,0.04550171,0.006767273,-0.0132369995,-0.040161133,0.018707275,-0.024002075,-0.01474762,0.01461792,-0.018463135,0.0036792755,-0.0039749146,-0.016235352,-0.01461792,0.0149002075,-0.0019512177,0.01084137,0.053985596,-0.017440796,-0.024765015,-0.07183838,-0.017364502,0.024215698,0.07147217,-0.0019664764,-0.0036830902,-0.04937744,0.0051078796,0.04321289,0.00043320656,0.018325806,-0.013519287,-0.005180359,0.016677856,-0.02961731,-0.037719727,-0.008369446,0.029663086,0.0022773743,-0.006008148,0.028320312,0.0031929016,0.0047721863,0.0004863739,-0.004924774,0.028961182,-0.01751709,-0.0046043396,-0.018234253,0.033477783,-0.0054092407,-0.033172607,-0.050720215,0.02645874,-0.013748169,0.047943115,-0.03265381,-0.016967773,-0.012756348,0.008995056,0.014297485,-0.017608643,-0.00969696,-0.0017776489,-0.029571533,-0.04827881,0.026779175,-0.012435913,0.023208618,0.014595032,0.004108429,0.036468506,0.0044555664,0.001124382,0.015655518,-0.026885986,-0.016845703,-0.04046631,-0.029418945,-0.010803223,-0.0099105835,-0.040405273,0.018753052,-0.00096321106,0.013084412,0.0012798309,-0.019012451,0.039855957,0.0047721863,-0.00390625,0.01574707,0.012611389,0.013877869,0.0211792,0.015991211,-0.05908203,0.00026869774,-0.005783081,-0.0037651062,-0.022384644,0.026351929,0.021331787,-0.0335083,0.0069084167,0.0010852814,-0.03060913,-0.014320374,-0.020187378,0.0010566711,0.022445679,0.019134521,-0.016983032,0.0181427,0.014198303,-0.024002075,-0.038757324,0.00932312,0.027038574,-0.03591919,0.013671875,0.023986816,0.047058105,-0.025390625,0.010559082,0.02041626,0.02557373,0.024673462,-0.017089844,-0.0018939972,0.03955078,-0.016357422,0.013587952,-0.00062799454,-0.0025405884,0.005519867,0.003955841,0.02142334,0.024032593,0.016525269,-0.017059326,-0.035858154,-0.004146576,-0.00026488304,-0.011116028,0.023223877,0.02696228,0.029953003,-0.012130737,0.028411865,0.030029297,-0.02079773,-0.013664246,-0.0066719055,0.03741455,-0.025909424,-0.011062622,0.011726379,0.00894165,0.03466797,-0.06439209,-0.0033931732,-0.006088257,0.01171875,0.016921997,-0.058380127,-0.03930664,0.00048422813,0.017730713,-0.0070228577,0.015823364,0.020736694,-0.000007987022,-0.003540039,0.030044556,-0.016220093,-0.015457153,0.005836487,-0.050354004,-0.04006958,-0.0063667297,-0.0012817383,-0.012794495,0.013702393,-0.021514893,-0.02734375,0.0087890625,-0.030899048,0.014656067,-0.01953125,0.015419006,0.043182373,-0.01071167,0.018936157,0.0038833618,-0.00605011,0.0010614395,0.0067329407,0.023208618,-0.02708435,0.031951904,-0.03363037,-0.0065689087,0.004032135,0.026473999,0.025543213,0.020431519,-0.0010442734,0.033599854,-0.038513184,0.03427124,-0.031677246,0.02243042,-0.011367798,-0.02571106,-0.019577026,-0.02619934,-0.01234436,0.05331421,0.001543045,-0.011039734,-0.028884888,-0.015510559,0.0003683567,-0.050598145,0.023208618,0.017669678,0.03262329,-0.020767212,0.016906738,0.008621216,0.004562378,0.0035076141,-0.011962891,-0.0079956055,0.019134521,0.032073975,0.006248474,-0.022872925,-0.0118255615,0.0045204163,0.0028495789,-0.05899048,-0.03652954,-0.022033691,0.04486084,0.00077962875,-0.0076141357,-0.029312134,-0.011184692,-0.00084400177,-0.035858154,0.025848389,0.0020427704,0.033111572,-0.0023269653,-0.012672424,-0.002374649,0.0062026978,-0.007259369,0.054534912,-0.0071792603,-0.0049934387,-0.03756714,0.017364502,0.011650085,0.033813477,-0.0015115738,-0.020050049,0.003522873,-0.034973145,-0.056884766,-0.01108551,-0.011459351,-0.004676819,-0.007007599,-0.02154541,-0.057556152,-0.016357422,-0.020690918,-0.0016965866,0.020858765,0.010276794,0.014160156,0.0015563965,0.012031555,-0.023620605,-0.029586792,-0.01864624,0.019744873,0.010101318,0.009399414,0.012916565,0.05709839,0.00010973215,-0.021347046,-0.0024204254,-0.00071048737,0.020370483,-0.017822266,0.019119263,-0.0044288635,0.030670166,-0.002483368,-0.018066406,-0.039764404,-0.0039520264,0.07159424,0.016677856,0.007774353,0.0010995865,-0.000813961,0.013900757,0.032073975,-0.020935059,0.016586304,-0.009773254,0.03717041,-0.0126953125,0.014923096,0.014503479,0.019500732,-0.029342651,-0.049194336,0.00014436245,0.0053634644,-0.006290436,-0.067993164,-0.03869629,-0.054229736,-0.011436462,-0.011581421,-0.017211914,-0.0034313202,0.008712769,-0.018707275,-0.08441162,-0.003063202,0.054016113,0.011894226,0.028549194,-0.02658081,0.032043457,0.043304443,-0.018127441,-0.027008057,0.03225708,-0.046691895,-0.015609741,-0.017578125,0.03643799,-0.019317627,-0.027801514,0.016342163,0.013534546,0.027267456,0.0041770935,0.011711121,-0.026275635,0.008766174,-0.0069122314,0.014015198,-0.010810852,-0.007972717,0.030639648,-0.038116455,0.035858154,0.0014677048,-0.013008118,0.006919861,0.030593872,0.035583496,-0.035827637,-0.00831604,0.018493652,-0.0052948,0.047088623,-0.019119263,0.05480957,0.023117065,0.007965088,0.0007791519,-0.0036354065,-0.011238098,-0.03878784,-0.0259552,0.032226562,0.0043029785,0.004924774,-0.020019531,-0.0049858093,0.008453369,-0.0018463135,0.022750854,-0.012336731,-0.009246826,-0.030456543,0.015525818,0.017913818,0.003004074,0.0028953552,0.013504028,0.009315491,0.04989624,0.0062179565,-0.017486572,0.01272583,0.032348633,-0.002691269,-0.0043563843,0.011444092,0.02079773,0.015296936,0.031143188,0.020523071,-0.040649414,-0.019943237,-0.025924683,-0.005088806,-0.005607605,0.0059280396,0.0003068447,-0.0024681091,0.0045433044,-0.0011291504,-0.034423828,-0.009361267,-0.024108887,-0.04522705,0.006526947,-0.013977051,0.012435913,0.015525818,0.014404297,0.03010559,-0.009986877,0.039245605,-0.0026988983,-0.002149582,0.031951904,0.028366089,0.0077819824,-0.030075073,-0.0022239685,-0.012290955,-0.014823914,0.019546509,-0.0011224747,0.012573242,0.0184021,-0.010398865,0.004711151,-0.0011749268,0.020553589,-0.0014657974,0.0060157776,-0.00957489,0.0033416748,-0.029006958,0.03503418,-0.0541687,0.023529053,0.0132751465,-0.00038814545,0.008781433,-0.0055236816,-0.022659302,0.014320374,0.0009469986,-0.0231781,0.047729492,0.0031223297,0.042388916,-0.01234436,-0.02381897,-0.0044288635,-0.026535034,-0.016647339,0.0079422,-0.014976501,-0.003753662,0.0042533875,-0.035827637,0.034423828,-0.027755737,0.010520935,-0.0090408325,0.022277832,-0.015975952,-0.017700195,-0.0076141357,-0.013725281,-0.026809692,-0.008216858,-0.010124207,0.050567627,0.023284912,0.018707275,0.025741577,0.018066406,0.0045776367,-0.028244019,-0.032287598,0.009429932,-0.020126343,0.016357422,-0.029388428,0.03945923,0.04977417,0.009933472,0.05529785,0.038848877,0.04095459,-0.015342712,0.015625,-0.03152466,0.020812988,-0.018173218,0.009254456,0.0049057007,0.031799316,-0.016815186,0.019180298,0.0066070557,0.023864746,-0.04888916,0.022155762,0.076538086,0.018051147,0.00084733963,0.022384644,-0.007194519,-0.008728027,-0.016235352,-0.005722046,0.05947876,0.011009216,0.035064697,0.04940796,0.021072388,0.01259613,0.0013475418,-0.026107788,-0.012237549,0.05407715,0.020080566,-0.027114868,0.0059013367,-0.028442383,0.008300781,-0.040039062,-0.017486572,0.0047340393,0.010276794,0.013687134,0.005771637,-0.028015137,-0.0005431175,0.030227661,-0.006919861,0.008338928,-0.012702942,0.022903442,0.030349731,0.0016593933,0.010513306,-0.010429382,0.01600647,-0.023147583,-0.02760315,0.010154724,0.03515625,-0.0044441223,0.0067100525,0.026763916,0.0048103333,0.023529053,0.03491211,-0.01007843,0.0003736019,0.030914307,-0.00034928322,-0.005306244,0.03552246,0.032592773,0.013587952,0.038330078,0.048919678,0.040039062,-0.02507019,0.021026611,-0.008605957,-0.007801056,-0.015258789,-0.0036773682,0.017410278,-0.0013809204,0.021743774,0.008026123,-0.038085938,0.021057129,0.027908325,0.012527466,-0.015670776,-0.0026111603,0.022216797,-0.019943237,0.02293396,-0.005138397,-0.0073165894,0.033050537,0.012550354,0.014976501,-0.026321411,0.02848816,-0.00030446053,-0.016494751,-0.013839722,0.01701355,-0.0463562,0.031341553,-0.014564514,0.0012435913,-0.05307007,-0.0027542114,-0.0037155151,-0.0019006729,0.0057868958,0.013214111,-0.015419006,-0.008468628,0.034210205,0.02949524,-0.011161804,-0.019500732,-0.021270752,0.038635254,0.04232788,0.011360168,0.0022945404,-0.0042877197,0.0151901245,0.015975952,-0.00831604,0.0046958923,0.0003437996,-0.008300781,-0.024429321,0.0211792,0.026733398,0.020614624,0.049560547,-0.016677856,-0.012336731,-0.0043640137,0.03289795,0.007911682,-0.027938843,-0.0028686523,0.013664246,-0.0041999817,0.060394287,0.048065186,-0.0005235672,0.029800415,-0.016067505,-0.011505127,0.0053901672,-0.022018433,0.009735107,-0.013031006,0.010177612,-0.00554657,0.02368164,-0.021652222,-0.025787354,0.0062294006,-0.021514893,-0.01737976,-0.020095825,0.009391785,-0.013267517,0.01852417,0.03933716,0.017028809,-0.013557434,0.061523438,-0.03225708,0.038208008,0.0029735565,-0.004524231,0.04953003,0.029266357,0.038604736,0.0073013306,0.015686035,-0.021453857,0.021347046,0.03881836,0.009521484,-0.00068616867,0.010719299,-0.017837524,0.031555176,-0.002067566,0.03817749,-0.008621216,-0.009376526,-0.0026874542,-0.014717102,-0.017562866,-0.008728027,0.0007200241,0.025543213,0.04434204,-0.030914307,-0.014945984,-0.022903442,-0.020507812,0.026657104,-0.025253296,-0.001086235,-0.015258789,-0.019241333,0.019134521,-0.028549194,-0.0127334595,0.011672974,0.032958984,-0.046936035,-0.014160156,-0.00029826164,0.02557373,-0.022445679,0.02293396,0.020690918,-0.003648758,0.008728027,0.032043457,-0.010360718,0.047058105,-0.005493164,0.04095459,0.017028809,-0.0005502701,-0.022216797,0.00023078918,0.01626587,-0.02607727,0.0052604675,0.04437256,-0.012550354,-0.0010738373,-0.013710022,-0.011352539,-0.0035419464,0.012321472,-0.0053901672,0.004600525,0.0024147034,-0.012794495,0.018203735,0.018661499,-0.0057754517,-0.009986877,0.010688782,-0.022567749,0.0049057007,0.028015137,0.01713562,-0.047912598,-0.002313614,0.01890564,0.010040283,-0.0102005005,-0.027252197,-0.017227173,-0.037628174,0.01374054,0.014823914,0.02406311,-0.003501892,-0.024291992,-0.0011348724,0.013504028,0.014518738,0.031677246,0.013893127,-0.01285553,0.0008802414,-0.0037269592,0.0068130493,-0.009757996,-0.0074806213,0.01977539,0.025985718,-0.004425049,-0.019805908,0.015960693,-0.009170532,0.0023536682,0.025634766,0.0070228577,0.012481689,-0.027786255,-0.025924683,0.0042037964,0.013252258,-0.009651184,-0.019592285,-0.020050049,0.017349243,0.04699707,-0.009864807,-0.0077285767,0.014045715,0.021896362,0.025665283,0.034606934,0.031951904,0.048736572,0.019989014,-0.0034885406,-0.011276245,0.018692017,-0.0178833,-0.033935547,0.016799927,-0.016830444,-0.020828247,0.039245605,0.017929077,0.005569458,-0.016983032,-0.011985779,-0.010955811,-0.0107803345,0.013031006,-0.007904053,0.015899658,-0.037872314,-0.021408081,0.0077171326,-0.0206604,-0.012245178,-0.012954712,-0.010513306,-0.008125305,-0.05795288,0.002796173,-0.025238037,0.00093746185,-0.007785797,0.012168884,0.02305603,0.03225708,-0.0033550262,-0.0017185211,-0.0034160614,0.04421997,0.009857178,0.03439331,0.016952515,-0.024658203,-0.026351929,-0.019363403,-0.0002696514,-0.01625061,0.02545166,-0.011390686,0.027038574,0.020553589,-0.037231445,-0.005241394,-0.0010356903,-0.0034637451,-0.009613037,-0.035888672,-0.016738892,0.0018911362,0.028320312,-0.0023994446,-0.009506226,0.039642334,-0.025848389,-0.016906738,0.03286743,0.031219482,-0.0012760162,0.04159546,-0.027404785,-0.009086609,-0.018325806,-0.0015592575,-0.007987976,0.007762909,0.005393982,0.034484863,0.023757935,0.0052375793,0.016204834,-0.0077552795,0.012611389,0.029922485,0.018432617,-0.005420685,0.022949219,0.0013217926,-0.007873535,-0.016571045,-0.007820129,0.04083252,0.028411865,0.016738892,0.003396988,-0.0129776,0.004096985,-0.014656067,0.014160156,0.032714844,-0.011604309,-0.033996582,-0.00969696,-0.025253296,0.015129089,-0.0058898926,-0.0003874302,0.007335663,0.006752014,-0.005443573,-0.024215698,-0.017684937,0.017242432,0.0037631989,-0.018081665,-0.012565613,-0.008453369,0.036071777,-0.030899048,0.013008118,-0.057281494,-0.021575928,-0.011909485,-0.016403198,0.0317688,-0.006290436,0.009750366,-0.0019683838,-0.011421204,-0.008544922,0.016845703,0.01272583,-0.023010254,-0.013343811,0.0020599365,0.037078857,0.00084352493,0.017211914,-0.0028858185,0.004470825,0.0013074875,-0.0032215118,0.00995636,-0.015510559,0.03225708,0.0057640076,-0.0047569275,0.03012085,0.008903503,0.015342712,-0.009162903,-0.014122009,0.009140015,-0.007385254,0.04611206,-0.010116577,-0.025375366,0.019943237,-0.016571045,-0.052459717,0.010124207,0.01637268,0.01953125,-0.019119263,0.051361084,0.001531601,-0.031402588,0.019058228,0.0014257431,-0.025558472,-0.002325058,0.019729614,-0.012908936,0.012466431,-0.009544373,-0.013900757,-0.03012085,-0.02255249,0.0072631836,-0.013442993,-0.011016846,0.012084961,0.031311035,0.03677368,-0.00043678284,0.024978638,0.027908325,0.007987976,0.039886475,0.009063721,0.05770874,-0.004611969,-0.026062012,-0.0011634827,-0.0058670044,-0.011993408,0.016357422,0.0032482147,-0.00032663345,-0.026123047,-0.0050201416,0.019088745,0.031341553,-0.009849548,0.017837524,-0.02545166,-0.01109314,-0.020080566,0.00085926056,-0.027786255,0.00623703,0.028961182,0.027191162,0.008026123,-0.022888184,-0.02468872,0.014274597,0.038330078,-0.009353638,-0.037841797,-0.0033416748,0.009269714,0.0011997223,0.012573242,0.0066566467,-0.01739502,-0.025787354,0.0037593842,0.0075263977,0.0026226044,-0.018844604,0.014595032,-0.0044403076,-0.029205322,-0.0043640137,0.008255005,-0.00774765,-0.0073165894,-0.0026512146,0.000063598156,0.031341553,0.029129028,-0.024673462,0.007335663,0.022949219,-0.038482666,0.057128906,-0.013931274,0.016189575,-0.017242432,0.004032135,-0.035980225,-0.0036697388,-0.002532959,0.0058250427],"createdAt":"2026-04-18T18:43:39.423Z","updatedAt":"2026-04-24T18:32:22.706Z","lastSeenAt":"2026-04-24T18:32:22.706Z","tsv":"'/api/v1/cards/52/transactions':42,167 '/request':143 '0.02':11,26,68,142 '000':70 '20':69 '300':98 '402':55 '6':76 'Base network API' 'USDC micropayment API' 'access':155,174 'address':88 'advertis':105 'ai/ml':114 'analysi':117 'analyt':113 'api':110,148,173,192 'base':9,24,61,71,159 'behind':43 'broad':107 'call':49 'card':5,20,38,218,228 'card data endpoint' 'card transactions API' 'card-transact':4,19,37,217 'card-transactions' 'chain':83 'challeng':56 'classif':119 'connect':200 'content':206 'convers':136 'could':224 'data':112,230 'decim':77 'doc':190 'document':178,208 'embed':120 'endpoint':7,22,32,163,220 'estim':130 'exact':91,213 'exampl':210 'exchang':125 'expect':183 'expos':35 'feed':124 'field':185 'financ':121 'financi':227 'format':188 'function':214 'gas':129 'gate':3,18 'generat':137 'geocod':134 'howev':160 'infer':115 'infrastructur':132 'input':184 'instant':154 'key':149 'label':169 'land':103 'limit':152 'list':165 'low fee API' 'lowpaymentfee.com':34 'maximum':95 'network':62 'no-api-key' 'on-chain':81 'page':104,195 'pay':10,25 'pay-per-call API' 'pay-per-request' 'payload':211 'payment':46,51,78 'per':12,27,65 'point':145 'premium':172 'price':64,123,144,191 'prompt':202 'protocol':47 'provid':101 'quot':128 'rate':126,151 'readm':194 'relat':225 'remain':221 'request':13,28,57,66,181 'resourc':40 'respons':187 'return':53,197 'schema':182 'scheme':92 'second':99 'sentiment':116 'settl':80 'span':111 'specif':162 'specifi':86 'specul':234 'substant':205 'suit':108 'summar':118 'timeout':96 'token':127 'transact':6,21,39,219,229 'unclear':222 'unit':72 'usdc':15,30,58,74 'usdc-base' 'use':89 'util':133 'valid':135 'via':156 'wallet':87,201 'web3':122 'without':50,207 'x402':2,17,45,157 'x402 payment endpoint' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"83d9ea9e-1f26-4b86-a38c-a2050b2fae64","listingId":"b5647091-37d3-4561-a926-19c67db04289","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/52/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":"2026-04-18T18:43:39.423Z"}],"sources":[{"listingId":"b5647091-37d3-4561-a926-19c67db04289","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/52/transactions","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:39.423Z","lastSeenAt":"2026-04-24T18:32:22.706Z"}],"details":{"listingId":"b5647091-37d3-4561-a926-19c67db04289","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/52/transactions \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base network with the exact scheme","source_url":"https://lowpaymentfee.com/api/v1/cards/52/transactions"},{"claim":"The provider advertises $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/52/transactions"},{"claim":"Docs, pricing, API, and README pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving transaction data for a specific card via a pay-per-request model","Integrating on-chain micropayments into agent workflows that need card transaction info","Accessing financial data without traditional API key provisioning"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Use cases requiring keyless, pay-per-call access to card transaction data","Developers exploring x402 protocol integrations"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-request fees add up quickly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:26.638Z"},"updatedAt":"2026-04-24T18:32:22.706Z"}}