{"id":"ebf2ec36-223a-49f9-a6de-422f4c3b3e6f","shortId":"9Jfbr5","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request 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 endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/payments/262` is labeled \"Premium API Access\" in the x402 challenge. Its exact functionality beyond that label is not documented — the crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" stub with no further detail. The x402 challenge confirms the endpoint is live, accepts POST requests, requires a maximum payment of 20,000 base units of USDC (i.e., $0.02), and returns `application/json`. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawl.\n\nBecause the endpoint's specific behavior is undocumented and the broader site's documentation pages are empty stubs, agents should treat this as a low-information listing. The payment mechanics are clear and functional, but what the endpoint actually returns for a given request body is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access"],"warnings":["No documentation available — all doc/pricing/API/README pages return only a 'Connect wallet' stub","No OpenAPI or request/response schema provided; the exact behavior of /api/v1/payments/262 is unknown","Endpoint label 'Premium API Access' is generic and does not describe what data or service is returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/262","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/payments/262","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality beyond 'Premium API Access' is completely undocumented. All doc pages returned empty stubs.","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":"2026-04-19T06:53:32.983Z","embedding":[-0.016174316,-0.035339355,0.040740967,0.013313293,0.013122559,-0.02923584,-0.026107788,0.03186035,0.07775879,-0.07080078,0.036468506,-0.054626465,-0.034454346,-0.045043945,-0.023117065,0.011329651,-0.009231567,-0.0008416176,-0.03744507,0.027008057,0.03326416,-0.024871826,-0.035247803,0.03213501,-0.0010023117,-0.025619507,-0.01625061,-0.008178711,-0.011123657,-0.030731201,0.03414917,-0.026657104,0.0034046173,0.002084732,-0.016967773,-0.01965332,-0.009498596,0.04046631,0.03756714,-0.015403748,-0.00043225288,-0.064819336,-0.010231018,0.0014677048,-0.05731201,-0.009757996,0.014823914,-0.025878906,0.00091838837,0.008590698,-0.036468506,-0.007457733,-0.0031032562,-0.0005273819,0.014205933,0.0034599304,-0.0052986145,-0.009895325,0.004310608,0.014968872,-0.003742218,-0.06500244,-0.021255493,-0.014076233,0.006790161,0.05831909,-0.014694214,0.057006836,0.012504578,0.046295166,0.047332764,0.06378174,0.02331543,0.015777588,0.009056091,-0.015510559,0.015151978,0.06112671,-0.017288208,-0.019210815,-0.022079468,-0.016571045,-0.048706055,0.0047950745,-0.023361206,-0.047546387,-0.01977539,0.014312744,-0.021408081,0.01776123,-0.07458496,0.003610611,-0.011108398,0.002948761,-0.0021305084,-0.0048065186,-0.02279663,0.01826477,-0.013931274,0.015823364,0.018173218,-0.043029785,0.01651001,0.0067710876,0.04421997,0.044067383,0.030303955,0.03161621,0.0006184578,-0.027053833,-0.028137207,0.020050049,-0.018753052,-0.00819397,0.010314941,0.010887146,-0.015991211,0.009063721,-0.02368164,0.015586853,-0.05142212,0.050323486,0.013221741,-0.015129089,0.017181396,-0.052246094,0.002243042,0.00724411,-0.027389526,-0.0050811768,0.009307861,0.00774765,0.022644043,-0.023880005,-0.03363037,0.0127334595,-0.021514893,-0.018554688,-0.04663086,-0.03237915,0.04034424,-0.03074646,0.021026611,0.041503906,-0.09692383,-0.0126953125,-0.043945312,0.0068473816,-0.034240723,-0.0031051636,-0.0018005371,0.023422241,-0.012084961,-0.009941101,-0.035827637,-0.022476196,0.00024986267,0.030075073,-0.020401001,0.049957275,-0.000893116,0.024902344,0.025161743,0.014907837,0.030075073,0.03253174,0.0011167526,-0.06726074,-0.08306885,-0.023544312,-0.003232956,-0.02003479,-0.036193848,0.0012960434,-0.0053253174,-0.06756592,-0.026824951,-0.013946533,-0.007335663,-0.04864502,0.0027427673,-0.028182983,0.016921997,0.0041275024,-0.06713867,-0.023147583,-0.029968262,0.07165527,0.036376953,0.0126571655,0.03656006,-0.024047852,0.062286377,0.012390137,-0.03213501,-0.03289795,0.022735596,-0.018859863,0.011474609,0.004535675,0.001958847,-0.039245605,0.030258179,0.07397461,0.02432251,-0.016235352,-0.0065078735,-0.05178833,-0.046875,-0.043426514,0.014732361,0.0022907257,0.006855011,0.038604736,-0.025680542,-0.034606934,0.0065994263,0.007896423,0.014732361,0.057250977,0.016494751,0.0017061234,0.012054443,0.016159058,-0.044189453,0.02760315,0.030075073,0.020599365,-0.026367188,-0.022598267,0.02229309,0.032836914,-0.028045654,0.012641907,-0.019515991,0.031097412,-0.004802704,0.022583008,0.022949219,-0.019485474,-0.017196655,-0.028503418,-0.014312744,0.02760315,0.008300781,-0.015319824,-0.032684326,-0.07727051,0.04977417,0.038970947,0.040374756,-0.0053596497,0.0010404587,-0.022644043,-0.023162842,-0.07159424,0.05355835,0.08465576,-0.016036987,-0.0049743652,0.009407043,-0.0019283295,-0.04232788,-0.010345459,-0.010093689,-0.03366089,-0.017700195,0.009460449,-0.033599854,-0.004650116,0.0067634583,0.03842163,0.057617188,-0.0046424866,-0.0619812,-0.027557373,-0.004432678,0.017562866,-0.027008057,0.004524231,-0.008964539,0.020492554,0.03265381,0.0014753342,0.027267456,0.004142761,0.004371643,-0.0068092346,0.001282692,-0.022201538,-0.03643799,0.020263672,-0.008293152,-0.06866455,-0.00009447336,-0.0020656586,0.068481445,-0.04989624,0.044006348,-0.009185791,0.0025253296,0.06427002,-0.003168106,-0.046447754,0.007801056,0.018981934,0.03338623,0.05065918,0.0009331703,-0.028778076,-0.01260376,0.08093262,-0.02519226,-0.010772705,0.021240234,0.009277344,0.033813477,-0.0007624626,-0.055419922,-0.029464722,-0.0064353943,-0.030227661,0.027313232,-0.017990112,0.026275635,-0.021347046,0.010383606,-0.027633667,0.0032596588,-0.03552246,0.0033493042,-0.0101623535,0.0036678314,-0.012954712,-0.007511139,0.016708374,0.01676941,-0.010025024,0.016113281,0.041015625,0.018218994,-0.006149292,-0.034454346,-0.02670288,-0.012069702,0.008506775,0.018997192,0.025772095,0.015701294,0.04776001,-0.042175293,0.014457703,0.03692627,0.024597168,0.022644043,-0.0063476562,0.012817383,-0.07232666,-0.056640625,-0.02760315,-0.049346924,0.028579712,0.010643005,-0.00075626373,0.057373047,0.013412476,-0.0138168335,-0.048339844,0.02279663,-0.03878784,-0.0066604614,0.044067383,-0.0075302124,-0.033599854,-0.00088882446,0.0033988953,0.0038604736,0.028808594,0.015853882,0.01725769,0.06323242,0.048583984,-0.0029125214,0.014717102,0.012702942,0.02720642,0.0073013306,-0.029830933,-0.024597168,-0.017440796,0.015945435,-0.017608643,-0.012718201,-0.07531738,0.05441284,0.036315918,0.08734131,0.016357422,0.01234436,0.03805542,-0.016784668,0.012390137,-0.03289795,-0.022735596,-0.023712158,-0.04525757,0.031951904,-0.021102905,-0.009605408,-0.008094788,0.023635864,-0.00020599365,0.026062012,-0.033416748,0.0546875,0.0079956055,-0.0022010803,0.018127441,0.0065612793,0.048095703,0.05783081,-0.044006348,0.036865234,0.023529053,-0.034973145,0.0178833,0.0357666,-0.02532959,-0.0032081604,-0.046051025,-0.018005371,-0.0022144318,-0.004081726,-0.056152344,0.011489868,0.0056152344,0.018920898,0.027313232,-0.019592285,-0.02760315,0.002937317,-0.018920898,-0.05645752,-0.016036987,-0.032073975,0.0032043457,0.050872803,-0.03074646,0.0007929802,0.004096985,-0.011558533,-0.00012636185,0.006149292,0.020339966,-0.0016584396,-0.03387451,0.026611328,0.0020122528,0.022476196,0.011741638,0.038604736,0.018951416,0.021270752,0.04324341,0.018829346,-0.017410278,-0.055725098,0.01940918,-0.049102783,0.010528564,0.014656067,-0.014328003,-0.0025959015,-0.01864624,-0.017807007,-0.03125,0.0028057098,-0.01576233,0.012557983,0.02482605,-0.0289917,-0.0335083,-0.054992676,-0.021377563,0.003774643,0.068603516,0.026901245,0.003145218,-0.051452637,-0.008178711,0.026367188,0.0066947937,0.008338928,-0.014770508,-0.008270264,-0.015670776,-0.029968262,-0.0072746277,-0.024459839,0.011650085,-0.007091522,-0.012786865,0.03366089,-0.00028300285,0.020751953,-0.002960205,0.012069702,0.03149414,-0.028396606,-0.000385046,-0.024505615,0.037078857,0.0061149597,-0.014953613,-0.051635742,0.038360596,0.015129089,0.032714844,-0.027633667,0.00036740303,-0.0012083054,0.016647339,0.012634277,-0.012809753,-0.013595581,-0.010673523,-0.055419922,-0.08514404,0.040252686,-0.016601562,0.022644043,0.024993896,0.014144897,0.019012451,0.0031738281,0.0020179749,0.026397705,-0.021240234,-0.0124053955,-0.027450562,-0.03970337,-0.0104599,-0.014549255,-0.008018494,0.020767212,-0.020568848,0.010505676,-0.0022258759,-0.018676758,0.030258179,0.0029010773,-0.0032634735,0.015838623,0.008888245,0.023651123,0.04046631,0.007019043,-0.044006348,0.015945435,0.006454468,0.0020141602,-0.008972168,0.04421997,0.03555298,-0.0074005127,-0.013000488,-0.0041770935,-0.022903442,-0.017822266,0.0009493828,0.0006289482,0.025665283,0.001584053,-0.043182373,0.02015686,0.006954193,-0.023880005,-0.019088745,0.015220642,0.013031006,-0.031021118,0.019714355,0.026428223,0.05999756,-0.022094727,0.005630493,0.015602112,0.019302368,0.030090332,0.013420105,-0.019958496,0.011352539,0.0033054352,0.015182495,-0.0025482178,-0.012367249,0.010856628,0.006389618,0.022521973,0.023117065,0.008346558,-0.026779175,-0.02558899,0.0042533875,-0.016418457,-0.01524353,0.017547607,0.028945923,0.026977539,-0.026382446,0.019073486,0.014717102,-0.022644043,-0.022979736,-0.015274048,0.031021118,-0.026000977,-0.019851685,0.01600647,0.004787445,0.03189087,-0.05593872,-0.004714966,0.0101623535,0.013267517,-0.030700684,-0.037384033,-0.04324341,0.012207031,0.036376953,0.016235352,0.019210815,0.030700684,-0.00089788437,0.006313324,0.023605347,-0.00046730042,-0.015007019,-0.016738892,-0.03125,-0.00667572,-0.0049057007,0.0039863586,-0.029754639,0.012924194,-0.0152282715,-0.026016235,0.00642395,-0.011375427,-0.0052223206,-0.011199951,0.013290405,0.030334473,-0.003288269,0.010864258,-0.02029419,-0.025924683,-0.0055351257,0.005924225,0.014671326,-0.052368164,0.014526367,-0.017700195,0.004173279,-0.0066223145,0.009674072,0.020126343,0.025863647,0.003408432,0.027297974,-0.042816162,0.032409668,-0.02609253,0.011505127,0.0135650635,-0.041168213,-0.0042915344,-0.0184021,-0.017532349,0.034362793,-0.01991272,-0.015464783,-0.021255493,-0.037841797,-0.014907837,-0.05340576,0.014709473,0.045013428,0.03552246,-0.025436401,0.0015182495,-0.004398346,-0.0029354095,-0.009170532,0.0115737915,-0.01638794,0.025283813,0.016601562,0.008934021,-0.036590576,-0.022003174,-0.021224976,0.004962921,-0.05014038,-0.045654297,-0.020339966,0.0066490173,-0.007194519,-0.011947632,-0.0317688,-0.023620605,-0.0002156496,-0.044158936,0.017929077,0.0138168335,0.023712158,0.013366699,-0.018600464,-0.0045928955,0.0037612915,-0.0013694763,0.037902832,0.014312744,-0.01852417,-0.04324341,-0.0011034012,0.028076172,0.027786255,-0.0055732727,-0.011474609,0.0019330978,-0.017059326,-0.059509277,-0.023452759,-0.0060577393,-0.009239197,-0.0055007935,0.015960693,-0.052368164,0.0010528564,-0.01727295,0.0010213852,0.023269653,0.021881104,0.00995636,0.0008406639,0.0070724487,-0.002450943,-0.017349243,-0.03527832,0.022460938,0.010887146,0.0038414001,0.018234253,0.050201416,0.0034637451,-0.014160156,0.005256653,0.0012731552,0.018112183,-0.018432617,0.006072998,-0.018554688,0.0068359375,-0.00907135,-0.016326904,-0.03250122,-0.009651184,0.09240723,-0.00089120865,-0.0119018555,-0.01979065,-0.020385742,0.019836426,0.02671814,-0.0362854,-0.0024642944,-0.030258179,0.020996094,-0.013504028,0.023620605,0.020019531,0.022354126,-0.017364502,-0.05999756,-0.012504578,0.0020866394,-0.01966858,-0.06036377,-0.021102905,-0.0670166,-0.011856079,-0.012481689,-0.023803711,0.004146576,0.021865845,-0.016937256,-0.0871582,0.0011987686,0.044921875,0.005016327,0.025161743,-0.01109314,0.023620605,0.020065308,-0.03189087,-0.01448822,0.03237915,-0.032470703,-0.0116119385,-0.027999878,0.016921997,-0.015670776,-0.023162842,0.0152282715,0.009391785,0.010192871,-0.012428284,0.0026454926,-0.010025024,0.014167786,-0.011558533,0.023254395,-0.0056877136,-0.0124435425,0.039154053,-0.04751587,0.018203735,0.026733398,-0.0020427704,0.0063323975,0.02583313,0.033325195,-0.042144775,-0.004749298,0.02468872,0.014442444,0.04309082,-0.021438599,0.041381836,0.01374054,-0.013465881,0.02130127,-0.010307312,-0.019760132,-0.040252686,-0.027160645,0.028366089,-0.0067634583,0.022705078,-0.016189575,0.0029029846,0.01676941,0.003458023,0.01687622,-0.0102005005,-0.02633667,-0.0134887695,0.010917664,0.006439209,0.0024051666,-0.009819031,0.026550293,0.014259338,0.039215088,0.01725769,-0.003791809,0.006290436,0.020065308,-0.016189575,0.013465881,0.02268982,-0.0010719299,0.015136719,0.024261475,0.0132369995,-0.037475586,-0.009918213,-0.025344849,-0.0035171509,0.004047394,-0.003036499,-0.020217896,-0.0040512085,0.00012421608,-0.0042495728,-0.035705566,0.0071105957,-0.03302002,-0.023529053,-0.012535095,-0.021377563,0.022567749,0.014457703,0.0074043274,0.01586914,-0.002817154,0.041046143,0.0068092346,-0.010437012,0.02357483,0.027664185,0.0121154785,-0.029251099,0.004917145,-0.00035762787,-0.0023078918,0.0057373047,-0.03062439,0.0053749084,0.042266846,-0.0141067505,0.009414673,0.0011825562,0.02734375,-0.008682251,0.011260986,-0.009590149,0.017608643,-0.013763428,0.030853271,-0.04763794,0.009689331,0.019943237,-0.0053215027,-0.006614685,-0.014350891,-0.024154663,0.024002075,0.0096206665,-0.011276245,0.041534424,0.0028362274,0.03643799,-0.031433105,-0.012077332,-0.0032253265,-0.026138306,-0.023040771,0.037353516,-0.0025520325,0.0004427433,0.017807007,-0.038238525,0.03894043,-0.036499023,0.028289795,-0.006275177,-0.0006980896,-0.002691269,-0.028396606,-0.02017212,-0.015556335,-0.013023376,0.004211426,-0.001045227,0.044769287,0.014930725,0.033691406,0.049560547,0.012161255,0.0035419464,-0.0395813,-0.0317688,-0.0009112358,-0.029464722,0.022872925,-0.0154800415,0.05014038,0.04510498,-0.0025634766,0.029067993,0.0368042,0.036102295,0.007019043,0.010368347,-0.015586853,0.005420685,-0.005710602,0.021072388,-0.0039138794,0.052368164,-0.0284729,0.031219482,0.010467529,0.029724121,-0.02368164,0.034118652,0.060394287,0.014656067,-0.017150879,0.042510986,-0.0033416748,-0.020019531,-0.01499939,-0.016952515,0.04864502,0.014625549,0.051818848,0.046783447,0.014144897,-0.01083374,0.022705078,-0.02458191,-0.030914307,0.066223145,0.024047852,-0.019958496,-0.014892578,-0.0006260872,0.0023288727,-0.05218506,-0.032806396,0.014328003,-0.0067710876,0.014678955,-0.0063972473,-0.0012245178,-0.011650085,0.013725281,0.02822876,0.017913818,-0.014144897,0.03463745,0.033203125,0.009208679,0.016799927,0.0007534027,0.028396606,-0.039855957,-0.016784668,0.020858765,0.021331787,-0.013450623,-0.0035972595,0.022720337,0.007881165,0.0552063,0.049224854,-0.011878967,0.010864258,0.038757324,0.011550903,-0.0032138824,0.05496216,0.030410767,0.013183594,0.04345703,0.031951904,0.024475098,-0.040039062,0.01977539,-0.004032135,0.016113281,-0.0052833557,-0.014160156,-0.0024433136,-0.010612488,0.019210815,-0.004676819,-0.018417358,0.01689148,0.022277832,-0.0027256012,-0.0053367615,-0.012290955,0.007972717,-0.019714355,-0.0028877258,0.013908386,-0.015113831,0.031921387,0.009101868,0.0284729,-0.023956299,0.024459839,-0.01374054,-0.017654419,-0.0034770966,0.019851685,-0.04321289,0.0095825195,-0.0018987656,0.007385254,-0.046203613,0.009277344,0.029251099,-0.014167786,0.024749756,0.0062675476,0.0015935898,0.006160736,0.026382446,0.012298584,0.0011138916,-0.01651001,-0.02619934,0.040985107,0.04827881,0.00023758411,0.01889038,-0.01789856,-0.004825592,0.0030975342,-0.0025157928,-0.014015198,-0.014968872,-0.02041626,-0.03842163,0.012390137,0.034210205,0.027236938,0.03265381,-0.011680603,-0.010925293,0.007446289,0.029464722,0.005065918,-0.008674622,-0.009101868,0.020141602,-0.013893127,0.055511475,0.035949707,0.0061149597,0.0357666,-0.015609741,-0.025253296,0.01159668,-0.0129470825,0.023376465,-0.014808655,0.0017776489,-0.009185791,0.022720337,-0.019180298,-0.037384033,0.010887146,-0.018554688,-0.008460999,-0.031433105,0.00016188622,0.011459351,0.0309906,0.033691406,0.011703491,-0.030456543,0.06488037,-0.013671875,0.043151855,-0.010414124,-0.00554657,0.047058105,0.03378296,0.035705566,0.026824951,0.016494751,-0.037139893,0.021560669,0.03704834,0.018310547,0.009147644,-0.0035552979,-0.022735596,0.039520264,0.008262634,0.027893066,-0.018661499,0.0012779236,0.015625,-0.0056495667,0.0070114136,-0.0033454895,-0.0014448166,-0.00027108192,0.038330078,-0.02558899,-0.006412506,-0.026519775,-0.013694763,0.032562256,-0.01033783,0.00033211708,0.007183075,-0.017990112,0.020202637,-0.026351929,-0.014732361,0.00095033646,0.030090332,-0.04220581,-0.016235352,0.003873825,0.00730896,-0.022918701,0.028656006,0.019302368,0.0036964417,0.010948181,0.04647827,-0.008560181,0.034576416,-0.020843506,0.019241333,0.026229858,-0.004917145,-0.019363403,0.0113220215,0.010116577,-0.019088745,0.013473511,0.035003662,-0.014533997,0.0048103333,-0.004055023,-0.01184082,0.010368347,-0.0008649826,-0.010124207,-0.006011963,-0.0154418945,-0.011436462,0.0032901764,0.007194519,-0.0021095276,0.008255005,-0.0043792725,-0.013465881,0.012489319,0.044067383,0.0138168335,-0.038879395,-0.0007266998,0.002910614,0.009506226,-0.03036499,-0.011360168,-0.0049209595,-0.024597168,0.013977051,0.0138549805,0.0054740906,0.012809753,-0.021591187,0.0020751953,0.030273438,0.015792847,0.024765015,0.0061569214,0.0010471344,0.024414062,-0.020004272,0.0025463104,-0.007610321,-0.003900528,0.008110046,0.020141602,-0.003917694,-0.027297974,0.026245117,-0.0014028549,0.008529663,-0.00006890297,-0.024032593,0.013282776,-0.012702942,-0.007419586,-0.003414154,0.008834839,-0.010322571,-0.016860962,-0.01876831,0.030090332,0.056274414,-0.020507812,-0.0013160706,0.02607727,0.012138367,0.01083374,0.033599854,0.009300232,0.04574585,0.02796936,-0.02331543,-0.022018433,0.025634766,-0.014328003,-0.029891968,0.015365601,-0.015319824,-0.01285553,0.008911133,0.021591187,-0.00026798248,-0.03515625,-0.021743774,-0.009437561,-0.019973755,0.019302368,-0.014419556,0.008804321,-0.029815674,-0.0138168335,0.0044441223,-0.01360321,-0.035980225,-0.025741577,-0.0046691895,-0.016693115,-0.038482666,0.012062073,-0.025039673,0.01524353,-0.018615723,-0.0071640015,-0.015258789,0.03302002,-0.014167786,-0.006881714,0.019943237,0.023086548,0.02571106,0.005672455,0.025863647,-0.031341553,-0.029830933,-0.021942139,-0.0051879883,-0.012084961,0.025253296,-0.0058288574,0.03894043,0.018997192,-0.0017290115,-0.005508423,-0.011756897,-0.0044288635,-0.009735107,-0.029541016,-0.01499939,0.024978638,0.01184082,-0.0119018555,-0.014968872,0.036895752,-0.02571106,-0.014053345,0.02482605,0.04660034,0.007083893,0.0284729,-0.015914917,-0.0010137558,-0.008422852,0.006801605,-0.013000488,0.009788513,0.0066490173,0.0079422,-0.015090942,-0.0009069443,0.029724121,-0.0074920654,-0.008583069,0.02003479,0.00015068054,-0.011367798,0.030670166,0.015419006,0.0047073364,-0.0026130676,-0.014076233,0.019332886,0.036376953,0.014656067,0.002462387,0.0024795532,0.012611389,-0.016571045,0.007247925,0.014053345,-0.008811951,-0.03579712,-0.0107803345,-0.029937744,0.026184082,0.002298355,0.00983429,-0.0078125,0.0131073,-0.020202637,-0.030410767,-0.020339966,0.020370483,0.006126404,-0.013618469,-0.009559631,0.00062942505,0.02355957,-0.03326416,0.003824234,-0.04623413,-0.042175293,-0.0061073303,-0.026977539,0.020019531,0.012466431,-0.015388489,0.0042381287,0.0043182373,0.003118515,0.0007610321,0.027572632,-0.022583008,-0.010353088,0.034118652,0.012870789,-0.028625488,0.0099105835,-0.01914978,-0.0059776306,0.01838684,-0.001086235,0.009559631,-0.017227173,0.038604736,-0.005329132,-0.010482788,0.02178955,0.0026607513,0.018981934,-0.031707764,0.010826111,-0.0012559891,-0.0014944077,0.030548096,-0.025024414,-0.020431519,0.007896423,-0.019546509,-0.030517578,0.003993988,0.016067505,0.032470703,-0.0082092285,0.0345459,-0.01637268,-0.015716553,0.015930176,0.00806427,-0.020935059,-0.008514404,0.036956787,0.004753113,-0.0041046143,-0.009124756,-0.01411438,-0.035705566,-0.004058838,0.016220093,-0.0022621155,-0.011207581,0.02331543,0.009918213,0.046020508,0.0006337166,0.022659302,0.013092041,0.0053253174,0.027496338,0.008415222,0.04623413,0.0037498474,-0.028335571,0.017410278,0.0037326813,-0.02357483,-0.0046844482,-0.012313843,0.0056266785,-0.041137695,0.014297485,-0.0011396408,0.030197144,-0.018081665,0.009246826,-0.024780273,0.0049972534,-0.038909912,-0.017868042,-0.02078247,0.010826111,0.030075073,0.00014424324,0.018966675,0.002779007,-0.026031494,0.0077667236,0.037261963,-0.009544373,-0.030014038,-0.012840271,0.009086609,0.0071907043,0.011024475,0.005382538,-0.01763916,-0.032165527,0.0019073486,-0.019012451,0.007858276,-0.0088272095,0.016708374,0.0025482178,-0.004512787,0.0030097961,0.02684021,-0.001329422,-0.0012521744,0.0069084167,0.009773254,0.028076172,0.034179688,-0.020050049,0.020507812,0.025344849,-0.035491943,0.050354004,-0.0035743713,0.027862549,-0.01789856,-0.005748749,-0.037231445,-0.02923584,-0.011695862,0.001704216],"createdAt":"2026-04-18T18:50:03.944Z","updatedAt":"2026-04-22T09:01:17.108Z","lastSeenAt":"2026-04-22T09:01:17.108Z","tsv":"'/api/v1/payments/262':103 '0.02':12,28,90,164 '000':158 '20':157 'Base network API' 'USDC micropayment API' 'accept':149 'access':7,23,40,108 'actual':223 'agent':202 'ai/ml':61 'analysi':64 'analyt':60 'api':6,22,39,57,107,126 'application/json':167 'avail':180 'base':9,25,98,159 'behavior':189 'beyond':116 'bodi':229 'broad':50 'broader':194 'call':4,20 'catalog':51 'challeng':112,143 'classif':66 'clear':216 'confirm':144 'connect':134 'convers':83 'crawl':123,183 'data':59 'detail':140,178 'doc':124 'document':121,179,197 'embed':67 'empti':200 'endpoint':34,86,102,146,186,222 'estim':77 'exact':114 'exampl':175 'exchang':72 'feed':71 'financ':68 'function':115,218 'gas':76 'generat':84 'geocod':81 'given':227 'host':48 'i.e':163 'infer':62 'inform':210 'infrastructur':79 'json-response' 'label':105,118 'list':211 'live':148 'low':209 'low-inform':208 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':154 'mechan':214 'network':99 'openapi':171 'page':129,198 'pay':2,18,54 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':53 'payment':44,155,213 'per':3,13,19,29,55,91 'post':150 'post-method' 'premium':5,21,38,106 'premium API access' 'price':70,88,125 'protocol':45 'provid':37 'quot':75 'rate':73 'readm':128 'request':14,30,56,92,151,228 'request/response':174 'requir':152 'return':131,166,224 'schema':172 'sentiment':63 'settl':93 'site':47,195 'span':58 'specif':101,188 'stub':136,201 'summar':65 'token':74 'treat':204 'undocu':191 'unit':160 'unknown':231 'usdc':16,32,95,162 'usdc-base' 'util':80 'valid':82 'via':10,26,41 'wallet':135 'web3':69 'x402':11,27,43,111,142 'x402 API' 'x402-payment'","prices":[{"id":"320de06d-a998-47c7-805d-53d3b0636823","listingId":"ebf2ec36-223a-49f9-a6de-422f4c3b3e6f","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/payments/262","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:03.944Z"}],"sources":[{"listingId":"ebf2ec36-223a-49f9-a6de-422f4c3b3e6f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/262","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:03.944Z","lastSeenAt":"2026-04-22T09:01:17.108Z"}],"details":{"listingId":"ebf2ec36-223a-49f9-a6de-422f4c3b3e6f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/262 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/262"},{"claim":"All APIs on the site 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":"The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/payments/262"}],"useCases":["Paying per request for API access without API keys or subscriptions","Agent-driven API consumption with automatic USDC micropayments on Base","Accessing premium data or services via x402 protocol"],"bestFor":["Developers or agents wanting keyless, pay-per-call API access","x402-compatible agents settling payments in USDC on Base","Low-commitment API usage with no rate limits or minimums"],"notFor":["Users who need detailed API documentation or request/response schemas before calling","Applications requiring non-crypto payment methods","High-volume use cases where per-request pricing may be costly at scale"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:08.115Z"},"updatedAt":"2026-04-22T09:01:17.108Z"}}