{"id":"0a6533bb-744b-47d4-96be-fc50404a5884","shortId":"sAFb58","kind":"x402","title":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/cards/55` is one of many API endpoints offered by the provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.\n\nThe endpoint accepts POST requests and returns JSON responses. Payment is settled in USDC (USD Coin) on Base at a cost of $0.02 per request (20,000 base units with 6 decimals). The x402 challenge confirms the endpoint is live and requires an X-PAYMENT header for access. No API keys or rate limits are advertised — access is purely pay-per-call.\n\nHowever, the specific functionality of `/api/v1/cards/55` is unclear. The provider's landing page lists various API categories but does not explicitly document a \"cards\" endpoint. The docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional documentation. Without further information, the exact data or service returned by this particular endpoint cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","paid API access","x402 endpoint","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific functionality of /api/v1/cards/55 is undocumented — the 'cards' path does not appear in the provider's listed API categories","All documentation pages (docs, pricing, README) render only 'Connect wallet' with no content","No OpenAPI spec or response schema available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/55","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/55","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/request in USDC on Base). However, there is no documentation of what `/api/v1/cards/55` actually returns, no OpenAPI schema, no example requests/responses, and the docs pages are empty. The specific purpose of this endpoint is unknown.","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":"2026-04-19T03:04:39.775Z","embedding":[-0.019470215,-0.046569824,0.052825928,0.021850586,0.016555786,-0.033050537,-0.028793335,0.046813965,0.081604004,-0.06866455,0.034179688,-0.06329346,-0.05731201,-0.03213501,-0.032958984,-0.008003235,-0.011795044,0.018981934,-0.025009155,0.045684814,0.038879395,-0.0016260147,-0.015548706,0.0345459,0.010559082,-0.0017518997,-0.0059013367,-0.008659363,0.013839722,-0.042816162,0.031341553,-0.019058228,0.0054130554,0.013259888,-0.025146484,-0.018051147,-0.010185242,0.05508423,0.037475586,-0.01676941,0.005290985,-0.06286621,-0.0057029724,0.0034675598,-0.044708252,0.0015335083,0.014701843,-0.03955078,-0.011039734,0.023406982,-0.031799316,0.0033397675,-0.019561768,0.020614624,0.00762558,-0.009010315,-0.001335144,-0.029724121,0.013366699,0.020217896,-0.003042221,-0.0625,-0.010543823,0.0068206787,0.006378174,0.03942871,-0.028686523,0.053100586,0.009483337,0.07678223,0.030670166,0.044799805,0.027862549,0.013572693,0.000059485435,-0.0001296997,-0.007801056,0.046081543,-0.0023956299,-0.018188477,-0.02142334,-0.0040779114,-0.041412354,-0.010261536,-0.028930664,-0.07104492,-0.0057144165,0.0037384033,-0.017089844,0.023590088,-0.08477783,-0.004760742,-0.023208618,-0.0065231323,-0.0129776,0.00045514107,-0.027236938,0.004386902,-0.006134033,0.018707275,0.021759033,-0.037322998,0.02607727,0.02619934,0.057250977,0.021972656,0.016937256,0.042175293,-0.009651184,-0.02041626,-0.021530151,0.008483887,-0.024291992,-0.011024475,0.013870239,0.01763916,-0.006462097,0.011779785,-0.024597168,0.01789856,-0.05630493,0.05126953,0.036712646,-0.032684326,0.018692017,-0.033172607,-0.0038166046,-0.0104904175,-0.032196045,-0.012290955,0.00818634,0.008888245,0.04650879,-0.021957397,-0.035614014,0.0011587143,-0.013328552,-0.01838684,-0.05822754,-0.034423828,0.030380249,-0.02355957,0.035247803,0.026504517,-0.093566895,-0.018661499,-0.03970337,0.002336502,-0.048461914,-0.0025901794,-0.010261536,0.030899048,-0.011940002,-0.01134491,-0.016082764,-0.030899048,-0.0077667236,0.034362793,-0.016815186,0.05114746,0.010978699,0.016693115,0.010604858,0.009292603,0.023635864,0.030899048,-0.003572464,-0.06781006,-0.07299805,-0.029266357,-0.0113220215,-0.012489319,-0.048034668,0.0040893555,-0.014472961,-0.080322266,-0.03768921,-0.016326904,-0.011772156,-0.03552246,-0.008880615,-0.022766113,0.014663696,-0.01675415,-0.06689453,-0.00497818,-0.04586792,0.057159424,0.025741577,-0.0015230179,0.034088135,-0.013084412,0.051727295,0.012924194,-0.01966858,-0.03540039,0.025405884,-0.025756836,0.01626587,0.009025574,0.0023040771,-0.044891357,0.022445679,0.075805664,0.028259277,-0.028533936,0.004272461,-0.043884277,-0.021194458,-0.017364502,0.00032949448,0.0016450882,-0.019042969,0.024963379,-0.03543091,-0.043945312,0.0012569427,0.013267517,0.033233643,0.06585693,0.0029525757,0.008682251,0.0048828125,0.013023376,-0.03579712,0.044525146,0.03387451,0.03302002,-0.042022705,-0.02507019,0.018966675,0.06060791,-0.012298584,-0.0034770966,-0.02015686,0.0259552,-0.00749588,0.0039482117,0.035614014,-0.008621216,-0.028152466,-0.04360962,-0.01940918,0.016189575,0.002117157,-0.033935547,-0.057861328,-0.06640625,0.042419434,0.04537964,0.042144775,-0.030700684,0.0014286041,-0.021316528,-0.0056762695,-0.06112671,0.04385376,0.072753906,-0.023544312,-0.014907837,0.026046753,-0.009819031,-0.027130127,-0.037078857,-0.0158844,-0.026473999,-0.034118652,0.0067825317,-0.039886475,0.014015198,0.016281128,0.027252197,0.03665161,-0.007926941,-0.03756714,-0.032562256,-0.019683838,0.004764557,-0.016616821,-0.00415802,0.00982666,0.0016059875,0.037200928,-0.0035762787,0.020126343,-0.01651001,0.021987915,-0.0025558472,-0.005458832,-0.031677246,-0.024963379,0.012779236,-0.007045746,-0.07458496,0.012748718,-0.012901306,0.053100586,-0.030212402,0.04446411,-0.009033203,0.011726379,0.051605225,-0.032318115,-0.032348633,0.0020561218,0.013305664,0.062347412,0.039978027,0.004459381,-0.011749268,-0.023910522,0.040618896,-0.0013103485,-0.002576828,0.006729126,0.0345459,0.0071640015,-0.010231018,-0.05050659,-0.038635254,-0.020523071,0.002248764,0.022781372,-0.035583496,0.035308838,-0.018569946,0.0041885376,-0.032409668,-0.0043907166,-0.038116455,0.01914978,-0.0149383545,-0.00024044514,-0.01146698,-0.015716553,0.01914978,0.0073051453,-0.011871338,-0.030090332,0.027236938,0.032409668,-0.0095825195,-0.034301758,-0.005504608,-0.025146484,0.0055160522,0.030426025,0.019866943,0.024276733,0.01739502,-0.039642334,0.02418518,0.0149002075,0.0017642975,0.022628784,-0.009651184,0.012916565,-0.036010742,-0.043823242,-0.019622803,-0.024490356,0.026260376,-0.004547119,0.015052795,0.05166626,0.013679504,-0.031402588,-0.022781372,0.02709961,-0.05493164,-0.012359619,0.042877197,0.0011816025,-0.029724121,0.009437561,-0.015777588,0.0059318542,0.04714966,0.008651733,-0.006767273,0.06842041,0.041229248,0.01134491,0.014251709,0.022125244,0.03375244,-0.0010604858,-0.03074646,-0.029403687,-0.0024547577,0.005897522,-0.014167786,-0.03805542,-0.07965088,0.036895752,0.035186768,0.066467285,0.027282715,0.007080078,0.034698486,-0.020324707,0.0082092285,-0.02293396,-0.029342651,-0.021881104,-0.026824951,0.030807495,-0.02709961,-0.01826477,-0.025772095,0.033325195,0.00063467026,0.015403748,-0.029006958,0.05557251,0.0036354065,-0.021194458,0.010108948,0.0053520203,0.03527832,0.06384277,-0.04626465,0.037231445,0.01210022,-0.024810791,-0.012466431,0.03414917,-0.0053596497,-0.023040771,-0.05947876,-0.035614014,0.015029907,0.017578125,-0.064086914,0.029220581,0.01953125,0.03074646,0.009094238,-0.026290894,-0.029922485,-0.0071258545,-0.017684937,-0.051208496,-0.010108948,-0.029296875,0.005657196,0.044952393,-0.019897461,0.0057296753,0.011329651,0.004951477,0.0047073364,0.013572693,0.007217407,-0.00868988,-0.048736572,0.02468872,0.02192688,0.013999939,0.02255249,0.031036377,0.019943237,0.011108398,0.041259766,0.011192322,-0.0007586479,-0.03152466,0.017852783,-0.029876709,-0.017730713,0.0017662048,-0.007007599,0.015808105,-0.014579773,-0.012397766,-0.03692627,0.010192871,-0.013763428,0.018234253,0.050933838,-0.04724121,-0.036712646,-0.07098389,-0.014144897,0.027175903,0.08972168,0.02243042,-0.0023860931,-0.059448242,-0.009262085,0.030273438,0.009719849,0.012214661,-0.015350342,-0.019561768,-0.0062408447,-0.01979065,-0.016860962,-0.0021858215,0.026687622,-0.0044441223,-0.009208679,0.022415161,0.0027866364,0.017196655,0.0018358231,0.005378723,0.033813477,-0.019119263,0.008850098,-0.024459839,0.03567505,-0.0028209686,-0.02444458,-0.062805176,0.047729492,0.004058838,0.039123535,-0.039093018,-0.00248909,-0.004009247,0.016021729,0.02947998,-0.015449524,-0.0051574707,0.0146484375,-0.05255127,-0.073913574,0.019577026,-0.013069153,0.019363403,-0.0022792816,0.0058135986,0.03945923,0.004184723,0.001493454,0.03010559,-0.030319214,-0.014091492,-0.043701172,-0.030563354,-0.026779175,0.00078964233,-0.021713257,0.01651001,-0.0060920715,0.000729084,0.0038471222,-0.019927979,0.028335571,0.0038890839,0.0014677048,0.019805908,0.00030517578,0.0154800415,0.036010742,-0.00030374527,-0.037506104,0.008666992,-0.00045657158,0.0027484894,-0.006412506,0.029525757,0.028030396,-0.025863647,0.012290955,0.0005259514,-0.017547607,-0.026000977,-0.024917603,-0.0017547607,0.033325195,0.0026569366,-0.024414062,0.026901245,0.029876709,-0.03643799,-0.0178833,0.020736694,0.03567505,-0.027923584,0.019470215,0.03074646,0.057434082,-0.030776978,-0.00012230873,0.00793457,0.023498535,0.034484863,-0.0019302368,-0.018234253,0.0287323,-0.027236938,0.012466431,-0.0020618439,-0.019500732,0.008033752,0.0030212402,0.021972656,0.017074585,0.021331787,-0.028442383,-0.020614624,-0.01209259,-0.0017414093,-0.020019531,0.02079773,0.027938843,0.01235199,-0.010810852,0.035491943,0.014541626,-0.022399902,-0.012763977,-0.010108948,0.038757324,-0.022094727,-0.022598267,0.019058228,0.0005273819,0.03741455,-0.060424805,-0.0011959076,0.009185791,0.017028809,-0.016586304,-0.049560547,-0.032348633,0.0051956177,0.020904541,0.014022827,0.015014648,0.0016431808,-0.0042381287,0.003955841,0.020019531,0.003145218,-0.004878998,-0.0013389587,-0.05050659,-0.011421204,0.0014619827,-0.006340027,-0.004463196,0.008918762,-0.010749817,-0.024673462,-0.0012922287,-0.007724762,0.009315491,-0.017227173,0.0071372986,0.030639648,-0.026260376,0.0088272095,-0.016967773,-0.012283325,0.015991211,0.014976501,0.030349731,-0.032684326,0.021774292,-0.0236969,0.00088500977,-0.0021972656,0.023147583,0.024154663,0.031799316,-0.01461792,0.023239136,-0.048828125,0.039855957,-0.04486084,0.008918762,0.010879517,-0.030807495,-0.002248764,-0.01928711,-0.008430481,0.032440186,-0.0042304993,0.0048675537,-0.030715942,-0.023468018,-0.0005669594,-0.050964355,0.021347046,0.021820068,0.035186768,-0.03982544,0.009643555,0.014671326,0.0037841797,-0.0044517517,-0.011184692,-0.0012245178,0.015808105,0.026046753,0.005847931,-0.03845215,-0.014511108,0.011405945,0.0014162064,-0.050811768,-0.03878784,-0.02961731,0.02331543,-0.00024020672,-0.018325806,-0.020599365,-0.013252258,-0.0051231384,-0.036834717,0.024108887,0.010856628,0.039093018,0.017456055,-0.019439697,0.0062789917,0.025253296,-0.018066406,0.05105591,-0.00730896,-0.002210617,-0.034576416,-0.001789093,0.027786255,0.02822876,0.004711151,-0.011184692,-0.0039405823,-0.032684326,-0.048065186,-0.014053345,-0.010513306,0.009811401,-0.0022716522,-0.025650024,-0.0647583,-0.008857727,-0.018035889,-0.00024354458,0.02508545,0.007911682,0.019927979,0.012329102,-0.0009918213,-0.021591187,-0.032318115,-0.027816772,0.021514893,0.01084137,0.017700195,0.005180359,0.039367676,0.012458801,-0.018127441,0.014465332,-0.005142212,0.009765625,-0.015533447,0.0065460205,-0.0034179688,0.017852783,-0.0038394928,-0.017547607,-0.029586792,0.002981186,0.07513428,0.0046653748,0.0051574707,-0.0063209534,-0.0010652542,0.009475708,0.027862549,-0.046569824,0.00541687,-0.017089844,0.022949219,-0.0042419434,0.012237549,0.017303467,0.020980835,-0.021469116,-0.053894043,0.0028572083,0.02154541,-0.01058197,-0.050598145,-0.019577026,-0.060546875,-0.0107040405,-0.015426636,-0.01864624,-0.00090551376,0.0036525726,-0.0034236908,-0.07336426,0.001572609,0.050964355,0.016906738,0.012138367,-0.028686523,0.01953125,0.032440186,-0.025421143,-0.034606934,0.03378296,-0.03515625,-0.018569946,-0.038604736,0.040405273,-0.016296387,-0.028686523,0.027053833,0.006980896,0.025283813,-0.0013055801,-0.0073509216,-0.013244629,0.007423401,-0.010528564,0.02519226,-0.00059986115,-0.02734375,0.02407837,-0.026779175,0.033325195,0.0048446655,-0.017562866,-0.0051231384,0.025772095,0.042938232,-0.03466797,-0.0129776,0.036956787,0.0040664673,0.039733887,-0.021957397,0.045074463,0.0103302,-0.009963989,0.00907135,-0.009849548,-0.028656006,-0.049194336,-0.024307251,0.025421143,-0.008918762,0.03277588,-0.0096206665,0.007381439,0.012878418,-0.0035495758,0.018310547,-0.008995056,-0.016815186,-0.0096206665,0.019927979,0.009979248,-0.0034675598,0.014762878,0.026550293,0.007461548,0.049102783,-0.0075416565,-0.013160706,0.023071289,0.02116394,-0.009414673,0.008811951,0.01777649,0.003955841,0.01209259,0.030929565,0.023086548,-0.03152466,-0.025405884,-0.022262573,-0.011016846,-0.006965637,0.0068740845,-0.011482239,0.001282692,0.0054855347,0.010154724,-0.044006348,-0.0042533875,-0.02947998,-0.03756714,0.014198303,-0.020584106,0.008003235,0.013801575,0.020935059,0.027252197,-0.001572609,0.05126953,-0.0013179779,0.0138549805,0.029418945,0.021911621,0.0029563904,-0.021621704,-0.0018882751,-0.005870819,-0.0027713776,0.015975952,-0.007911682,0.0018587112,0.041900635,-0.0138549805,0.01423645,-0.017547607,0.021118164,0.0053977966,0.011817932,0.0013046265,0.0023479462,-0.018875122,0.03173828,-0.038848877,-0.0010910034,0.0234375,0.01864624,0.006298065,-0.01713562,-0.028152466,0.02180481,0.00047302246,-0.0143585205,0.049713135,-0.013191223,0.029693604,-0.018569946,-0.02557373,0.0065994263,-0.027832031,-0.011169434,0.027648926,-0.0025520325,-0.0019836426,0.010856628,-0.026687622,0.043121338,-0.030136108,0.014160156,-0.0032787323,0.009864807,-0.014076233,-0.014198303,-0.006450653,-0.0073051453,-0.01838684,-0.002658844,-0.0036907196,0.049957275,0.034423828,0.0093688965,0.01953125,0.004764557,0.00944519,-0.027359009,-0.020523071,0.00242424,-0.024337769,0.01676941,-0.03439331,0.04837036,0.04663086,0.008018494,0.041625977,0.030380249,0.025131226,0.0043029785,0.010803223,-0.026947021,0.01651001,-0.014038086,0.014266968,0.011566162,0.041656494,-0.019561768,0.018829346,-0.0017518997,0.021209717,-0.0418396,0.03265381,0.06732178,0.024124146,-0.0002655983,0.03894043,-0.014053345,-0.009010315,-0.01637268,-0.0035953522,0.059265137,0.0135650635,0.04147339,0.042236328,0.01725769,-0.013015747,0.017654419,-0.027542114,-0.024047852,0.059173584,0.03869629,-0.030014038,-0.0036945343,-0.009475708,0.013931274,-0.052124023,-0.02243042,0.018676758,0.00349617,0.018554688,-0.002450943,-0.011054993,-0.008636475,0.024795532,0.0181427,0.010772705,-0.016174316,0.037750244,0.028717041,0.0036087036,0.017288208,0.00018453598,0.028137207,-0.026428223,-0.015960693,0.004512787,0.025894165,-0.013168335,0.008041382,0.024871826,0.008255005,0.043884277,0.03845215,-0.011199951,0.0057754517,0.03994751,-0.0041999817,-0.0155181885,0.021392822,0.022094727,0.015640259,0.04156494,0.0446167,0.023727417,-0.03074646,0.010025024,-0.013412476,0.005493164,-0.0072784424,-0.015266418,0.012680054,-0.0039482117,0.01878357,0.018737793,-0.031219482,0.028930664,0.026321411,0.004837036,0.0022239685,-0.0020961761,0.012435913,-0.008224487,0.011940002,-0.00034856796,-0.011192322,0.038391113,0.013442993,0.0259552,-0.0135269165,0.021408081,-0.002658844,-0.023345947,-0.015731812,0.0054473877,-0.04220581,0.012878418,-0.011238098,-0.0036849976,-0.052459717,0.018112183,0.016815186,0.001332283,0.026870728,-0.00021135807,-0.0061683655,0.0068092346,0.038909912,0.012794495,-0.012680054,-0.02027893,-0.024627686,0.04949951,0.04083252,0.009567261,0.019927979,-0.007648468,0.0065689087,0.01828003,0.0005059242,0.014793396,-0.012771606,-0.005592346,-0.05822754,0.010223389,0.024765015,0.028427124,0.035003662,0.0030288696,-0.016738892,-0.0048942566,0.028579712,0.0057678223,-0.000374794,-0.027648926,0.020751953,-0.010169983,0.057678223,0.047668457,-0.0046577454,0.022003174,-0.021606445,-0.02017212,0.0022411346,-0.011398315,0.006275177,-0.023239136,0.008285522,-0.027389526,0.023910522,-0.021499634,-0.03918457,-0.00014936924,-0.01020813,-0.0060043335,-0.03010559,0.005493164,0.0046310425,0.023086548,0.035308838,0.0030727386,-0.0236969,0.068603516,-0.02243042,0.03353882,-0.0178833,-0.012413025,0.04800415,0.036499023,0.03024292,0.015174866,0.030166626,-0.020431519,0.00969696,0.046875,0.006465912,0.007549286,-0.003955841,-0.022338867,0.03274536,-0.0012626648,0.023086548,-0.0154800415,-0.012718201,0.015670776,0.002357483,-0.0023994446,0.0016050339,0.0043411255,0.026138306,0.034698486,-0.032562256,-0.014778137,-0.022125244,-0.024276733,0.031951904,-0.00022757053,0.0051231384,-0.0064811707,-0.024383545,0.024963379,-0.0256958,-0.0206604,-0.0032138824,0.029556274,-0.039245605,-0.015975952,-0.009269714,0.016464233,-0.0309906,0.025390625,0.023406982,0.0006184578,0.015945435,0.042633057,-0.0024414062,0.04144287,0.0008568764,0.03050232,0.032958984,-0.013824463,-0.019821167,0.010681152,0.013023376,-0.021499634,0.004245758,0.036102295,-0.01235199,0.009468079,-0.0063705444,-0.013908386,0.0015830994,0.018356323,-0.011695862,-0.0072898865,-0.008903503,-0.012145996,0.005088806,-0.0006017685,0.0021686554,-0.010223389,0.016784668,-0.007888794,0.008056641,0.04055786,0.016464233,-0.051605225,0.0002708435,0.011444092,0.01940918,-0.011886597,-0.023147583,-0.016540527,-0.032287598,0.009063721,0.009963989,0.009666443,0.004550934,-0.023269653,0.0058059692,0.024414062,0.016540527,0.02911377,0.006919861,-0.013069153,0.013298035,-0.01499176,0.010986328,-0.006416321,-0.0034866333,0.020492554,0.0262146,-0.010757446,-0.034698486,0.02947998,-0.0014095306,0.0044288635,0.011444092,-0.0045318604,0.026657104,-0.026184082,-0.026123047,0.0028934479,0.015426636,-0.009063721,-0.02458191,-0.030883789,0.022338867,0.054718018,-0.02229309,-0.0052337646,0.01512146,0.012527466,0.03945923,0.030532837,0.026550293,0.031173706,0.014022827,-0.01309967,-0.015014648,0.02709961,-0.016616821,-0.033416748,0.015899658,-0.017654419,-0.03378296,0.0317688,0.009468079,-0.006828308,-0.018447876,-0.025650024,-0.009010315,-0.022506714,0.0143966675,-0.009063721,0.0038433075,-0.024780273,-0.019119263,0.009841919,-0.001996994,-0.025360107,-0.031982422,-0.012359619,-0.014434814,-0.060394287,0.014305115,-0.022537231,0.012512207,-0.007369995,0.012886047,0.0073776245,0.039276123,-0.004749298,0.002565384,-0.009963989,0.03491211,0.005748749,0.026824951,0.0105896,-0.0129776,-0.042419434,-0.011985779,-0.008598328,-0.0045394897,0.017959595,-0.020599365,0.03656006,0.026473999,-0.011177063,-0.007785797,-0.013381958,-0.0022830963,0.008003235,-0.046173096,-0.011146545,0.00548172,0.018630981,-0.008659363,-0.0011320114,0.046417236,-0.01864624,-0.030319214,0.029510498,0.04763794,-0.002117157,0.043670654,-0.013450623,-0.018569946,-0.005142212,-0.006839752,-0.00630188,0.003873825,0.014541626,0.014671326,0.004432678,0.010116577,0.026428223,-0.015213013,0.0053634644,0.014328003,0.016494751,-0.01461792,0.026901245,0.009864807,-0.011756897,-0.009712219,-0.022399902,0.033233643,0.03765869,0.017501831,-0.0029354095,-0.0031814575,0.011795044,-0.012329102,0.0031738281,0.029022217,-0.021209717,-0.03161621,-0.006752014,-0.016433716,0.020233154,0.0015192032,0.0140686035,0.004589081,0.0069274902,-0.013076782,-0.02998352,-0.009742737,0.019866943,0.00699234,-0.010108948,-0.008934021,0.005558014,0.026107788,-0.030822754,0.012077332,-0.05557251,-0.022033691,-0.016113281,-0.0154953,0.011459351,0.0030708313,0.0029640198,-0.0022659302,-0.0033683777,0.006565094,0.0060653687,0.01737976,-0.024749756,-0.002248764,0.014884949,0.011627197,-0.008354187,0.011146545,-0.003900528,-0.011512756,0.016021729,-0.009925842,0.004760742,-0.012863159,0.042144775,0.005443573,-0.015945435,0.028869629,0.0008239746,0.0033302307,0.0058135986,-0.0022563934,0.012413025,0.0066871643,0.026489258,-0.016983032,-0.015151978,0.01524353,-0.013038635,-0.042053223,0.011642456,0.031555176,0.03451538,-0.018325806,0.046661377,-0.008277893,-0.0132369995,0.023483276,0.0069847107,-0.012580872,-0.008773804,0.030899048,0.009513855,-0.014015198,-0.0002053976,-0.020568848,-0.037384033,-0.014160156,0.01146698,-0.008140564,-0.009765625,0.024887085,0.010475159,0.04168701,0.0020751953,0.019515991,0.0317688,0.0004606247,0.026245117,0.008010864,0.05303955,0.0054397583,-0.021865845,0.00818634,-0.0013523102,-0.011642456,-0.0018558502,-0.0151901245,-0.0048065186,-0.031951904,0.0058288574,0.012786865,0.0284729,-0.012710571,0.0033454895,-0.021713257,-0.008407593,-0.012557983,-0.010665894,-0.01134491,0.0084991455,0.034057617,0.022399902,0.005130768,-0.015205383,-0.017547607,0.02218628,0.03866577,-0.013946533,-0.027755737,0.0008673668,0.0129776,-0.00006741285,0.003616333,0.00013041496,-0.03479004,-0.012123108,-0.0062789917,-0.00051259995,0.0072517395,-0.0073432922,0.018859863,-0.005756378,-0.025222778,0.0059318542,0.026535034,-0.0041770935,0.0054893494,0.016174316,0.0036888123,0.03225708,0.029876709,-0.013198853,0.03781128,0.028366089,-0.035949707,0.05441284,-0.006576538,0.012939453,-0.01007843,0.0063323975,-0.042785645,-0.012008667,0.0038700104,0.00484848],"createdAt":"2026-04-18T18:43:50.970Z","updatedAt":"2026-04-22T15:01:12.067Z","lastSeenAt":"2026-04-22T15:01:12.067Z","tsv":"'/api/v1/cards/55':51,145 '0.02':11,26,98 '000':102 '20':101 '6':106 'Base network API' 'USDC API' 'accept':78 'access':6,21,38,124,133 'addit':180 'advertis':132 'ai':68 'analyt':67 'api':5,20,37,56,126,155 'base':8,23,46,93,103 'base-network' 'call':139 'cannot':195 'card':163 'categori':64,156 'challeng':110 'coin':91 'confirm':111,197 'connect':175 'cost':96 'data':66,187 'decim':107 'doc':166 'document':161,181 'endpoint':32,50,57,77,113,164,194 'exact':186 'explicit':160 'financ':71 'function':143 'gate':3,18 'header':122 'howev':140 'includ':65 'inform':184 'infrastructur':74 'json':83 'json-response' 'key':127 'land':151 'learn':70 'limit':130 'list':153 'live':115 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':69 'mani':55 'micropayment API' 'network':9,24,47 'offer':58 'one':53 'page':152,170 'paid API access' 'particular':193 'pay':10,25,137 'pay-per-cal':136 'pay-per-request' 'payment':42,85,121 'per':12,27,99,138 'post':79 'post-method' 'premium':4,19,36 'premium API' 'price':167 'prompt':177 'protocol':43 'provid':35,61,149 'pure':135 'rate':129 'readm':169 'render':172 'request':13,28,80,100 'requir':117 'respons':84 'return':82,190 'servic':189 'settl':87 'span':63 'specif':49,142 'unclear':147 'unit':104 'usd':90 'usdc':15,30,89 'usdc-settlement' 'util':75 'various':154 'via':39 'wallet':176 'web3':72 'without':182 'x':120 'x-payment':119 'x402':2,17,41,109 'x402 endpoint' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"81bee746-1c5b-4072-8a0e-2b2ef804c850","listingId":"0a6533bb-744b-47d4-96be-fc50404a5884","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/55","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:50.970Z"}],"sources":[{"listingId":"0a6533bb-744b-47d4-96be-fc50404a5884","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/55","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:50.970Z","lastSeenAt":"2026-04-22T15:01:12.067Z"}],"details":{"listingId":"0a6533bb-744b-47d4-96be-fc50404a5884","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/55 \\\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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/cards/55"},{"claim":"Provider advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/cards/55"}],"useCases":["Accessing premium data or services with per-request USDC micropayments","Agent-driven API consumption without API key management","Pay-as-you-go access to infrastructure endpoints on Base"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents with x402 payment capability on Base","Users who prefer crypto micropayments over subscriptions"],"notFor":["Users needing detailed API documentation before purchasing","High-volume consumers who need bulk pricing or rate guarantees","Anyone without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:26.139Z"},"updatedAt":"2026-04-22T15:01:12.067Z"}}