{"id":"3a776b59-0199-4877-af8c-db3ee633671d","shortId":"bCU7eK","kind":"x402","title":"Pay-per-call market quote endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call market quote endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at `/api/v1/market/quote/C` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint appears to serve market quote data (likely crypto or financial asset quotes given the `/market/quote/C` path pattern and the site's Finance & Web3 category).\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per request is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). There are no API keys, no rate limits, and no minimum commitments — callers simply attach an X-PAYMENT header with a valid payment proof to receive the response.\n\nDocumentation beyond the landing page 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 example request/response bodies, and no description of what the `C` parameter represents or what fields the response contains. The endpoint is confirmed live (returns 402 challenge correctly), but the lack of documentation makes integration speculative.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","market-quote","pay-per-request","no-api-key","no-rate-limit"],"categories":["finance","crypto"],"synonyms":["market quote API","crypto price quote","token quote","financial quote endpoint","x402 market data","pay-per-call quote","USDC API payment"],"warnings":["No documentation available — docs/pricing/README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The meaning of the path parameter 'C' in /market/quote/C is undocumented","No example responses available to verify data quality or format"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/C","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/market/quote/C","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no explanation of what 'C' refers to, and all documentation pages are empty beyond a wallet-connect prompt. 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":"2026-04-18T20:07:13.424Z","embedding":[-0.017333984,-0.021057129,0.03881836,0.026504517,-0.016677856,-0.00674057,-0.0060920715,0.027435303,0.060150146,-0.07489014,0.031463623,-0.050628662,-0.023834229,-0.051605225,-0.005760193,0.014213562,-0.0043907166,0.005542755,-0.022323608,0.032165527,0.019058228,-0.028457642,-0.052215576,0.022079468,-0.022750854,-0.051849365,-0.01914978,-0.005252838,-0.021530151,-0.017913818,0.068237305,-0.024475098,-0.0118255615,-0.00018334389,-0.033569336,-0.01259613,0.015357971,0.021774292,0.03250122,-0.006072998,0.002527237,-0.059387207,0.013206482,-0.03274536,-0.030349731,-0.021102905,-0.011978149,-0.01525116,0.0035495758,-0.010757446,-0.04373169,-0.002204895,-0.012481689,0.009132385,0.00016450882,-0.0015106201,-0.00333786,0.0038051605,0.020553589,0.011672974,0.027450562,-0.048583984,-0.033599854,-0.020614624,-0.022384644,0.04714966,0.009208679,0.05899048,-0.0041007996,0.07208252,0.02406311,0.042663574,0.02494812,0.00014293194,0.002521515,-0.018218994,-0.0023326874,0.046966553,-0.0040245056,-0.016220093,-0.029449463,-0.024002075,-0.054718018,-0.02835083,0.0043144226,-0.046569824,-0.005344391,0.027328491,-0.02027893,0.059570312,-0.07989502,-0.011291504,0.011100769,-0.006668091,0.0022525787,-0.018676758,-0.007709503,0.037384033,0.0006418228,0.019622803,-0.007545471,-0.008049011,0.025878906,0.0063591003,0.03717041,0.05505371,0.02520752,-0.0014438629,0.0143585205,0.009246826,-0.048583984,0.026016235,0.015602112,-0.022750854,-0.01838684,0.016052246,-0.033233643,0.0014362335,-0.025360107,0.050323486,-0.048828125,0.047821045,0.01499176,0.00522995,0.008285522,-0.01927185,-0.026016235,0.025894165,-0.022903442,-0.012451172,-0.007232666,0.018661499,0.010536194,-0.0061035156,-0.030441284,0.012191772,-0.029205322,-0.00831604,-0.05407715,-0.04537964,0.02998352,-0.023117065,0.02217102,0.043914795,-0.08190918,-0.017150879,-0.029281616,0.01663208,-0.024795532,-0.024810791,0.0053253174,0.027893066,-0.005519867,-0.027191162,-0.0015010834,-0.032165527,-0.0016765594,0.02029419,-0.01550293,0.046020508,0.0016593933,0.05267334,0.00957489,-0.006061554,0.0093688965,0.026184082,-0.0041618347,-0.074157715,-0.06921387,-0.010795593,0.0074768066,-0.03656006,-0.032714844,-0.0042304993,-0.004219055,-0.060760498,-0.016799927,0.012496948,0.017303467,-0.019989014,0.015899658,-0.033966064,0.013374329,-0.0064849854,-0.03427124,-0.0071144104,-0.022598267,0.0715332,0.03225708,0.02067566,0.015174866,-0.015068054,0.04135132,0.021881104,-0.02079773,-0.017303467,0.0446167,-0.036315918,0.011062622,-0.005619049,0.013092041,0.0031642914,0.020523071,0.06970215,0.018325806,-0.023468018,-0.014457703,-0.062072754,-0.0541687,-0.017456055,0.018539429,0.0132751465,-0.007083893,0.020339966,-0.027893066,-0.011146545,0.0088272095,0.022247314,-0.013435364,0.05545044,0.022506714,0.036010742,0.024505615,0.035888672,-0.032440186,0.05899048,0.009132385,-0.0023117065,-0.005870819,-0.036987305,0.047790527,0.02557373,-0.012207031,0.011581421,-0.026138306,0.041931152,0.0011358261,0.003376007,-0.009750366,-0.020645142,-0.028625488,-0.037963867,-0.015655518,0.0115356445,0.004787445,-0.013786316,-0.034179688,-0.0993042,0.044525146,0.02961731,0.009109497,0.022628784,0.005306244,-0.01537323,-0.022735596,-0.07232666,0.054260254,0.047058105,-0.006137848,-0.053253174,0.022277832,-0.010353088,-0.043670654,-0.013763428,-0.0006132126,-0.02947998,-0.025924683,-0.015487671,-0.06573486,-0.010955811,0.028396606,0.025024414,0.024093628,0.0022201538,-0.04473877,-0.034820557,-0.035736084,0.0143966675,-0.016921997,-0.01737976,-0.013557434,0.014556885,0.029937744,0.0009050369,-0.0076179504,-0.020965576,-0.020217896,0.007659912,0.019439697,-0.0025577545,0.0012226105,0.0041656494,0.0077705383,-0.06124878,-0.013847351,0.0008420944,0.077941895,-0.05847168,0.04260254,-0.00869751,0.01777649,0.04714966,-0.011817932,-0.03930664,0.012039185,0.016677856,0.026138306,0.025268555,0.0016536713,-0.044311523,-0.031082153,0.06665039,-0.008605957,-0.025360107,0.00011211634,0.0042762756,0.029296875,-0.011222839,-0.050079346,-0.032226562,0.03302002,-0.023742676,0.03250122,0.003376007,0.009536743,-0.019378662,0.009796143,-0.038391113,-0.0005326271,-0.022155762,0.012336731,-0.022384644,0.019256592,-0.010353088,-0.007858276,0.036346436,-0.0021076202,0.0013189316,0.014907837,0.02935791,0.01864624,0.0039749146,-0.012321472,-0.0569458,-0.004020691,-0.01411438,0.003112793,0.015342712,0.037475586,0.04421997,-0.03491211,-0.0061950684,0.03250122,0.007713318,0.0446167,0.016403198,-0.012969971,-0.07122803,-0.044036865,-0.027236938,-0.003692627,0.024261475,0.013702393,-0.0116119385,0.04736328,0.010673523,-0.011108398,-0.057250977,0.021331787,-0.045135498,-0.015007019,0.044952393,-0.031204224,-0.035858154,0.0072288513,-0.015396118,0.01687622,0.030395508,0.012359619,0.03375244,0.076660156,0.020233154,-0.009422302,0.0056381226,0.019882202,0.014259338,0.0107803345,0.001042366,-0.020462036,-0.027893066,0.03125,-0.05593872,-0.0256958,-0.055358887,0.059326172,0.057434082,0.09698486,0.008140564,0.02015686,0.029571533,-0.0026474,-0.010910034,0.0016746521,-0.0019836426,-0.012313843,-0.032104492,0.028839111,-0.006286621,-0.0050621033,-0.01890564,0.060302734,-0.009918213,0.021591187,-0.016921997,0.030914307,-0.033691406,-0.010719299,0.011604309,0.040985107,0.06628418,0.040130615,-0.040008545,0.0028762817,0.04348755,-0.031921387,0.0033168793,0.019851685,-0.0061912537,0.0039253235,-0.042785645,0.00069379807,-0.00497818,0.00065374374,-0.029525757,0.011108398,0.03326416,0.01322937,0.041015625,-0.027450562,0.0019836426,-0.02696228,-0.02519226,-0.066101074,0.004497528,-0.03567505,0.020584106,0.028869629,-0.03967285,-0.016937256,0.0102005005,-0.011390686,-0.0082473755,0.016967773,0.010314941,-0.019561768,-0.029281616,0.05291748,0.0004069805,0.0068511963,0.0077438354,0.04837036,0.039245605,0.04321289,0.054504395,0.012680054,-0.017944336,-0.060546875,0.036071777,-0.041381836,-0.003358841,0.017837524,-0.021774292,-0.0022392273,-0.011764526,-0.036376953,-0.03149414,0.028884888,-0.0345459,-0.0061531067,0.001791954,-0.010757446,-0.0135650635,-0.05343628,-0.00013434887,0.0058403015,0.04055786,0.01461792,-0.0073394775,-0.005924225,0.008666992,0.034088135,0.00081157684,0.038024902,-0.012046814,0.012458801,-0.037719727,-0.024337769,-0.00074100494,-0.04067993,0.028305054,-0.022598267,-0.011451721,0.029129028,0.028839111,0.007575989,0.023529053,0.00017988682,0.048950195,-0.017028809,0.002407074,-0.0063591003,0.052825928,-0.021972656,-0.010307312,-0.04119873,0.016616821,0.0018663406,0.04373169,-0.03768921,-0.0058898926,-0.00072336197,0.010643005,0.009307861,-0.008918762,0.002084732,-0.014907837,-0.04269409,-0.053588867,0.0340271,-0.021530151,0.024673462,0.031158447,-0.014526367,0.010406494,0.002286911,0.017791748,0.008834839,-0.014678955,-0.019195557,-0.034118652,-0.048187256,-0.041992188,-0.0076904297,-0.03753662,0.023666382,-0.008041382,0.03250122,0.009361267,-0.0064735413,0.020812988,0.00844574,0.0041618347,-0.009170532,0.008399963,0.027496338,0.034088135,-0.003944397,-0.040130615,0.03161621,-0.0045814514,0.019378662,0.0015001297,0.037750244,0.036224365,-0.005153656,0.00063562393,-0.0068893433,0.0025997162,-0.022354126,0.0009112358,-0.008277893,0.009300232,-0.013420105,-0.053253174,0.007827759,0.016220093,-0.012184143,-0.022384644,-0.0059432983,0.017715454,-0.036346436,0.013092041,0.02357483,0.04296875,-0.03930664,0.009391785,0.01637268,0.027816772,0.007850647,0.008865356,0.0027484894,0.00087690353,-0.026916504,0.024520874,-0.0017766953,-0.012207031,0.019439697,0.017654419,0.020706177,0.013824463,0.0035114288,-0.0051078796,-0.021728516,-0.0031757355,-0.0018815994,-0.015136719,0.027404785,0.014335632,0.026351929,-0.035949707,0.00598526,0.022766113,0.0016183853,-0.03062439,0.014541626,0.029953003,-0.008598328,-0.011413574,0.004310608,0.01423645,0.026885986,-0.042236328,-0.010276794,0.0030574799,0.002084732,-0.029296875,-0.023529053,-0.027893066,-0.0099487305,0.034179688,0.009155273,0.019424438,0.02859497,0.0011177063,-0.0126953125,0.036590576,0.015312195,-0.023513794,-0.014915466,-0.040161133,0.010604858,-0.0069618225,-0.022903442,-0.018112183,0.010261536,-0.027130127,-0.01574707,0.012031555,-0.011802673,-0.0013208389,0.0018558502,0.010414124,0.024429321,-0.0058517456,0.009513855,-0.023101807,-0.027694702,-0.004600525,0.022399902,0.029174805,-0.03692627,0.03062439,-0.012519836,-0.0057678223,-0.008033752,0.03704834,0.021957397,0.04324341,0.016677856,0.028625488,-0.05529785,0.040618896,-0.03375244,-0.006965637,0.0010871887,-0.03515625,0.0071792603,-0.02810669,-0.008300781,0.03439331,-0.04397583,0.002632141,-0.021362305,-0.047302246,-0.02407837,-0.041534424,0.01109314,0.04473877,0.031707764,-0.021484375,0.015068054,-0.007534027,0.015716553,-0.009147644,-0.01550293,-0.022781372,0.02268982,0.017044067,0.018981934,-0.022277832,-0.028930664,-0.024475098,-0.016921997,-0.041015625,-0.0385437,-0.01184082,0.005607605,-0.009353638,0.0021438599,-0.0368042,-0.024124146,-0.009597778,-0.043670654,-0.0044822693,-0.007068634,0.015655518,-0.013412476,0.00049972534,0.021820068,0.010276794,-0.025924683,0.03579712,-0.0036563873,-0.01725769,-0.036346436,0.014373779,0.019088745,0.012107849,-0.0052490234,-0.030441284,0.007411957,-0.01398468,-0.05505371,-0.0024795532,-0.006526947,0.000068843365,-0.026107788,0.011100769,-0.043701172,-0.0021743774,-0.008918762,0.014213562,-0.00083494186,0.019073486,0.022842407,0.010154724,0.0057754517,-0.008323669,-0.015312195,-0.01902771,0.03781128,0.008491516,0.007587433,0.043518066,0.05126953,0.0096206665,-0.019836426,-0.0030784607,0.005393982,0.010528564,-0.027374268,0.0068130493,-0.0184021,0.02507019,-0.01071167,-0.0132369995,-0.045135498,0.011436462,0.05895996,0.000875473,-0.014930725,-0.024246216,-0.024215698,0.024520874,0.031921387,-0.043914795,-0.0018177032,-0.0064811707,0.031677246,-0.011375427,0.027252197,0.017303467,0.023147583,-0.016860962,-0.04525757,-0.014823914,-0.019836426,-0.019805908,-0.062194824,-0.03213501,-0.052215576,0.005207062,-0.007637024,-0.010757446,0.005882263,0.015548706,-0.028915405,-0.0848999,-0.011161804,0.036895752,-0.014587402,0.015098572,-0.013702393,0.018127441,0.01737976,-0.014884949,-0.02796936,0.02406311,-0.01751709,-0.000477314,-0.011520386,0.01374054,0.0038909912,-0.020263672,-0.004245758,0.009841919,0.027816772,-0.009506226,-0.0036773682,-0.031402588,0.012138367,0.0049057007,0.001991272,-0.016326904,-0.0051345825,0.042236328,-0.0423584,0.02281189,0.00031375885,0.002986908,0.0335083,0.037719727,0.03390503,-0.033569336,-0.0047721863,-0.0042877197,0.031982422,0.05908203,-0.02003479,0.024307251,0.021621704,0.008232117,0.0077934265,-0.0011358261,-0.0012540817,-0.046051025,-0.033355713,0.035980225,-0.020324707,0.006454468,-0.033325195,0.020492554,0.0061836243,0.00012922287,0.0072631836,0.0029258728,-0.030075073,-0.024673462,0.015991211,0.009994507,-0.0010824203,-0.002450943,0.018585205,0.041656494,0.028305054,0.010322571,-0.007457733,-0.0012378693,0.049041748,0.006954193,-0.010421753,0.00844574,0.004142761,0.019088745,0.022766113,0.008956909,-0.06347656,-0.03161621,-0.02217102,-0.025390625,0.018417358,-0.025527954,-0.016799927,-0.022079468,0.015716553,-0.0016870499,-0.031311035,-0.015731812,-0.038848877,-0.037719727,-0.0069770813,0.0029201508,0.011924744,-0.006542206,0.008216858,0.010238647,-0.014823914,0.016921997,-0.020309448,-0.0019626617,0.024841309,0.037872314,0.015014648,-0.028793335,0.008293152,-0.0039978027,0.014297485,-0.0022792816,-0.052215576,0.027236938,0.01966858,-0.00011044741,0.015159607,-0.00007468462,0.025558472,-0.02368164,0.012763977,0.011940002,0.015670776,-0.0064849854,0.032165527,-0.047058105,0.018066406,0.021972656,0.005836487,-0.017303467,-0.0047569275,-0.01878357,0.0140686035,0.010002136,0.002483368,0.048095703,-0.016845703,0.021591187,-0.023345947,-0.021438599,-0.0043945312,-0.030349731,-0.020568848,0.025756836,-0.013801575,-0.0071792603,0.009681702,-0.026260376,0.020339966,-0.034088135,0.020248413,0.019073486,0.013175964,-0.0020561218,-0.050079346,0.009017944,0.002040863,-0.027435303,0.011306763,0.013969421,0.037078857,-0.0044670105,0.03250122,0.039398193,0.012245178,0.0035629272,-0.038146973,-0.033935547,-0.0014028549,-0.017593384,0.024536133,-0.010848999,0.06866455,0.032104492,0.0022735596,0.034729004,0.03717041,0.038391113,-0.0107421875,0.02659607,-0.020812988,-0.0037059784,-0.018249512,0.013847351,-0.006450653,0.030517578,-0.044830322,0.0345459,0.03074646,0.0345459,-0.03503418,0.019515991,0.045928955,0.012580872,-0.014152527,0.050872803,-0.0045051575,-0.023071289,-0.010238647,-0.022537231,0.026138306,0.0013284683,0.04156494,0.037078857,0.0020256042,-0.018676758,0.011024475,-0.03439331,-0.010231018,0.044769287,0.030059814,-0.03250122,-0.0129852295,-0.0010671616,0.008453369,-0.031036377,-0.030273438,0.041900635,-0.0057144165,-0.0059814453,-0.026016235,0.004776001,-0.016738892,0.008514404,0.006717682,-0.0007004738,-0.02658081,0.036315918,0.0256958,-0.0062675476,0.03250122,0.0054244995,0.0158844,-0.017578125,-0.04638672,0.019958496,0.009002686,0.004486084,-0.021011353,0.012840271,0.0049095154,0.029830933,0.017440796,-0.026382446,-0.0016946793,0.023925781,0.0044441223,-0.009971619,0.054992676,0.012580872,0.031585693,0.047790527,0.0143966675,0.038391113,-0.034210205,0.018508911,0.010383606,0.016555786,-0.022521973,0.009666443,-0.0005707741,0.0018787384,0.02406311,0.005558014,-0.01889038,0.016311646,0.010360718,-0.016799927,-0.020401001,-0.027908325,0.018356323,-0.02520752,-0.0005078316,0.020599365,-0.010139465,0.039489746,0.0074157715,0.041992188,-0.039001465,0.024124146,-0.0021247864,-0.020187378,-0.007537842,0.037750244,-0.028503418,0.00434494,0.018661499,0.0011024475,-0.050628662,0.007381439,0.036132812,-0.0019044876,0.0064735413,-0.0018587112,0.0043029785,-0.008934021,0.027359009,0.007987976,0.012702942,-0.0151901245,-0.005836487,0.040374756,0.040039062,-0.0027694702,0.013626099,-0.030471802,0.002105713,0.003774643,-0.008087158,-0.020187378,-0.0052948,-0.014762878,-0.024902344,0.02053833,0.017303467,0.046020508,0.044830322,-0.0045433044,0.00012636185,-0.0004775524,0.049713135,0.012641907,-0.00554657,-0.0013799667,0.001871109,-0.030563354,0.049987793,0.01878357,-0.0016517639,0.03866577,-0.005054474,-0.014770508,0.02154541,0.019821167,0.026428223,-0.0012989044,-0.0045928955,0.010063171,0.01902771,-0.0049819946,-0.046905518,0.018035889,-0.030563354,-0.024902344,-0.013725281,0.017532349,0.019439697,0.043548584,0.025390625,0.027313232,-0.024673462,0.055603027,-0.015007019,0.024963379,-0.008041382,0.005466461,0.038146973,0.0071144104,0.037628174,0.01398468,0.018569946,-0.045562744,0.010017395,0.020339966,0.028839111,0.010231018,-0.015838623,-0.015640259,0.031433105,-0.0099487305,0.01625061,0.0105896,-0.010261536,0.0067214966,0.0046195984,-0.007972717,-0.013267517,0.0032215118,0.008728027,0.03112793,-0.014823914,0.01625061,-0.010177612,-0.0018844604,0.023483276,0.010414124,-0.0019016266,-0.013969421,-0.026168823,0.006412506,-0.010169983,-0.02293396,0.02609253,-0.004486084,-0.070007324,-0.016738892,-0.017044067,0.009963989,0.0018577576,0.026428223,0.042175293,-0.014640808,-0.010894775,0.038391113,-0.014480591,0.045166016,-0.011047363,0.033447266,0.0395813,-0.0019607544,0.013031006,0.0074768066,0.015716553,-0.018692017,0.022476196,0.023635864,-0.0037784576,0.012145996,0.014419556,0.004497528,-0.0032253265,-0.0046539307,-0.013175964,0.010261536,-0.01776123,-0.018630981,0.01928711,0.0026245117,-0.006362915,-0.014709473,-0.00027561188,-0.029251099,0.0057296753,0.030517578,0.012031555,-0.05065918,-0.0055122375,0.018554688,0.011451721,-0.033691406,-0.024520874,-0.011077881,-0.029937744,-0.0030822754,0.011619568,0.025390625,0.011001587,-0.0014448166,0.0052452087,0.024093628,0.018508911,0.0064315796,0.014953613,0.015396118,0.00033330917,-0.010269165,-0.01360321,0.008720398,-0.006668091,0.011405945,0.029159546,-0.0004043579,-0.029449463,0.02760315,-0.027938843,0.02017212,0.0013189316,-0.0032215118,0.0025424957,-0.006000519,-0.010826111,-0.012283325,0.019729614,-0.03463745,0.009597778,0.011428833,0.027252197,0.054473877,-0.02418518,-0.011039734,0.025527954,0.011672974,0.02684021,0.023773193,0.0011281967,0.03253174,0.02947998,-0.0077934265,0.0031604767,0.030151367,0.002401352,-0.042266846,0.00042366982,-0.007209778,-0.013290405,0.024383545,0.0025787354,0.0066337585,-0.031677246,-0.015380859,-0.011138916,-0.0102005005,0.012046814,0.010391235,0.007587433,-0.014625549,-0.010322571,0.008415222,-0.029037476,-0.027114868,-0.032226562,-0.00017297268,-0.015335083,-0.06695557,0.003452301,-0.024856567,0.0059127808,-0.016723633,0.0007762909,-0.010810852,0.004058838,0.002204895,0.0099105835,0.0006637573,0.018066406,0.025039673,-0.0049934387,0.018203735,-0.022018433,-0.029937744,-0.027252197,0.02218628,-0.01838684,0.013084412,0.0099487305,0.026504517,0.007270813,-0.010749817,0.0009713173,0.0006556511,-0.0044021606,-0.0018386841,-0.013702393,-0.020599365,0.032196045,0.0054893494,-0.012580872,-0.010848999,0.029891968,-0.03262329,-0.017684937,0.021347046,0.03967285,-0.0011806488,0.021484375,-0.003206253,-0.00006604195,-0.011024475,0.00023961067,-0.024810791,0.013687134,0.0042533875,0.008399963,0.00076818466,0.030639648,0.015274048,-0.005542755,-0.0028533936,0.025436401,0.008178711,0.007610321,0.030471802,0.01878357,0.0069618225,-0.009033203,-0.026428223,0.009101868,0.03768921,0.0049858093,0.005897522,-0.010116577,0.008148193,-0.030838013,-0.011703491,0.03100586,-0.0029182434,-0.037109375,0.00033640862,-0.043701172,0.0024719238,0.012336731,0.015419006,-0.015342712,0.019622803,-0.0008330345,-0.035064697,-0.010986328,0.027038574,0.010650635,0.0053634644,-0.019470215,0.0013113022,0.009460449,-0.03552246,-0.009719849,-0.05718994,-0.032043457,0.0016469955,-0.006038666,0.017440796,0.017700195,-0.012420654,0.008041382,-0.016784668,0.010818481,-0.01763916,0.008934021,-0.0033168793,-0.0021438599,0.026138306,0.04864502,-0.0061531067,0.010139465,-0.002483368,0.009666443,0.02545166,-0.009719849,0.024673462,-0.0178833,0.027694702,0.00022947788,0.0068740845,0.030639648,0.008979797,0.015197754,-0.04852295,-0.009918213,-0.0211792,0.007129669,0.028839111,-0.025115967,-0.029907227,0.009887695,0.0047340393,-0.030136108,-0.01134491,0.0048179626,0.0413208,-0.02053833,0.047210693,-0.027770996,-0.026779175,0.011192322,-0.003578186,-0.009086609,0.014907837,0.0009126663,0.01096344,-0.008171082,-0.00016450882,-0.0038394928,-0.01878357,-0.013214111,0.02432251,-0.024719238,-0.010398865,0.016647339,0.014862061,0.043029785,-0.019012451,0.014602661,0.002462387,0.011833191,0.03161621,-0.010673523,0.047698975,-0.0069618225,-0.044891357,-0.005744934,-0.00687027,-0.020339966,-0.004383087,-0.012878418,-0.0020713806,-0.032958984,0.02027893,0.014541626,0.041900635,0.0069503784,-0.0043182373,-0.012680054,0.010559082,-0.034729004,-0.009384155,-0.025558472,0.005241394,0.044158936,-0.012886047,0.028671265,0.006046295,-0.01348114,0.023117065,0.043823242,-0.009178162,-0.014518738,-0.026351929,0.01537323,-0.008270264,0.020065308,0.030319214,-0.017684937,-0.0053977966,0.014968872,-0.036712646,-0.0051002502,-0.011070251,0.022384644,0.007820129,-0.0034008026,0.0029563904,0.040527344,-0.011512756,-0.011405945,0.004184723,0.0049362183,0.0647583,0.023468018,-0.003124237,0.0020637512,0.01083374,-0.03805542,0.05065918,0.0021839142,0.01852417,-0.0040664673,-0.01083374,-0.050079346,-0.013542175,-0.024429321,-0.014289856],"createdAt":"2026-04-18T18:32:38.757Z","updatedAt":"2026-04-24T20:01:56.834Z","lastSeenAt":"2026-04-24T20:01:56.834Z","tsv":"'/api/v1/market/quote/c':38 '/market/quote/c':81 '/request':17,34 '0.02':16,33,121 '000':114 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':105 '20':113 '402':212 '6':124 'USDC API payment' 'addit':179 'ai/ml':58 'amount':108 'analyt':57 'api':54,129,165 'appear':67 'asset':77 'attach':140 'base':9,26,100,115 'base-network' 'beyond':156 'bodi':190 'c':197 'call':4,21 'caller':138 'categori':90 'challeng':213 'commit':137 'confirm':209 'connect':174 'contain':205 'contract':104 'correct':214 'crypto':74 'crypto price quote' 'data':56,72 'decim':125 'descript':193 'detail':181 'doc':164 'document':155,219 'endpoint':7,24,36,66,207 'equal':120 'exampl':188 'extrem':161 'field':202 'financ':88 'finance/web3':60 'financi':76 'financial quote endpoint' 'given':79 'handl':93 'header':145 'infer':59 'infrastructur':62 'integr':221 'key':130 'lack':217 'land':158 'like':73 'limit':133 'live':210 'lowpaymentfee.com':43 'make':220 'market':5,22,70 'market quote API' 'market-quote' 'maximum':107 'minimum':136 'network':101 'no-api-key' 'no-rate-limit' 'offer':46 'openapi':185 'page':159,169 'paramet':198 'part':40 'path':82 'pattern':83 'pay':2,19,51 'pay-per-cal':1,18 'pay-per-call quote' 'pay-per-request':50 'payment':91,144,149 'per':3,20,52,110 'platform':44 'price':166 'prompt':176 'proof':150 'protocol':97 'quot':6,23,71,78 'rate':132 'readm':168 'receiv':152 'render':171 'repres':199 'request':53,111 'request/response':189 'requir':109 'respons':154,204 'return':211 'schema':186 'serv':69 'settl':12,29 'simpli':139 'site':86 'span':55 'spars':162 'specif':65 'specul':222 'suit':48 'technic':180 'token quote' 'unit':116 'usdc':14,31,103,118,122 'usdc-settlement' 'use':102,123 'util':63 'valid':148 'via':10,27,94 'wallet':175 'web3':89 'x':143 'x-payment':142 'x402':11,28,96 'x402 market data' 'x402-payment'","prices":[{"id":"931404b3-f70c-42b3-a063-b0b75f1d9869","listingId":"3a776b59-0199-4877-af8c-db3ee633671d","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/market/quote/C","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:38.757Z"}],"sources":[{"listingId":"3a776b59-0199-4877-af8c-db3ee633671d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/C","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:38.757Z","lastSeenAt":"2026-04-24T20:01:56.834Z"}],"details":{"listingId":"3a776b59-0199-4877-af8c-db3ee633671d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/C \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/C"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/C"}],"useCases":["Fetching real-time market quotes for a specific asset without subscription commitments","Integrating pay-per-call financial data into autonomous agent workflows","Accessing market pricing data with crypto-native payment rails"],"bestFor":["Agents or bots needing on-demand market quotes without API key management","Developers wanting to pay per request with USDC on Base","Low-volume or bursty access patterns where subscriptions are wasteful"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk pricing","Users who need comprehensive documentation and guaranteed SLAs","Non-crypto-native users who cannot settle payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.07Z"},"updatedAt":"2026-04-24T20:01:56.834Z"}}