{"id":"ef8face1-9f46-44c2-97e0-39579ceca755","shortId":"K36ctx","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/payments/25` is labeled \"Premium API Access\" and requires a per-call payment of up to 0.02 USDC (20,000 base units of USDC with 6 decimals) settled on Base. No API keys, rate limits, or upfront commitments are needed — each request is individually paid for using an X-PAYMENT header carrying a signed USDC transaction.\n\nThe broader platform advertises endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. However, the specific endpoint being listed here (`/api/v1/payments/25`) does not clearly map to any of these named services — its description is simply \"Premium API Access\" with no further documentation on what data or functionality it returns.\n\nThe endpoint is live and responds with a valid x402 challenge (HTTP 402) when called without payment. Payment is settled in USDC (contract `0x8335...2913`) on Base to address `0x1A2B...85F3`. The docs, pricing, and README pages on the site returned only a \"Connect wallet\" prompt with no additional technical documentation, so the actual request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The endpoint '/api/v1/payments/25' is not listed among the named API services on the landing page — its actual functionality is unknown.","All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no technical content.","No request body schema or response schema is documented; callers cannot know what to send or what to expect back.","The platform lists many endpoint categories (AI, analytics, finance, infrastructure) but none are verified to actually return meaningful data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/25","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation on what the endpoint actually does or returns. The /docs, /pricing, and /README pages are empty beyond a wallet-connect prompt. The endpoint path '/api/v1/payments/25' doesn't match any of the named services on the landing page, making its purpose unclear. No request or response schema is available.","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":"2026-04-19T06:52:04.027Z","embedding":[-0.018997192,-0.033721924,0.049316406,0.017547607,0.008712769,-0.030426025,-0.025894165,0.04562378,0.06359863,-0.08306885,0.027420044,-0.047332764,-0.021224976,-0.049835205,-0.038238525,0.018692017,-0.010795593,0.0043754578,-0.042785645,0.028518677,0.024169922,-0.014503479,-0.027130127,0.041412354,-0.0020561218,-0.025756836,-0.009223938,-0.010528564,-0.009338379,-0.050354004,0.04135132,-0.02507019,-0.0070724487,0.004512787,-0.01675415,-0.026550293,-0.004573822,0.032348633,0.018554688,-0.011962891,-0.0036010742,-0.054779053,-0.003211975,-0.0054016113,-0.061828613,0.00016450882,-0.0004556179,-0.023040771,-0.009468079,0.0065193176,-0.02798462,-0.003255844,-0.013374329,-0.0019197464,0.013809204,0.007484436,-0.0110321045,-0.012741089,0.012435913,0.012207031,0.005859375,-0.057861328,-0.025299072,-0.017349243,0.00045251846,0.0602417,-0.014221191,0.047943115,0.022476196,0.045013428,0.05154419,0.067871094,0.023513794,0.021316528,-0.0059280396,-0.0015563965,0.01802063,0.066467285,-0.015213013,-0.020812988,-0.009437561,-0.0129852295,-0.043151855,0.004776001,-0.01876831,-0.041534424,-0.0152282715,0.016555786,-0.02003479,0.0284729,-0.07208252,0.000011086464,-0.014915466,-0.000039577484,0.011024475,-0.0131073,-0.019592285,0.02381897,-0.016296387,0.018478394,0.0067634583,-0.03781128,0.015029907,0.01108551,0.035339355,0.05581665,0.03466797,0.03942871,0.0075149536,-0.012680054,-0.026489258,0.022094727,0.003288269,-0.007858276,0.013824463,0.019424438,-0.02029419,0.008804321,-0.025360107,0.011245728,-0.04623413,0.051696777,0.024902344,-0.016067505,0.015853882,-0.04260254,-0.016616821,0.017959595,-0.018356323,-0.008583069,0.01184082,0.013557434,0.034942627,-0.019714355,-0.026275635,0.001707077,-0.014251709,-0.02128601,-0.04837036,-0.046661377,0.043395996,-0.029067993,0.026519775,0.04034424,-0.101501465,-0.013168335,-0.04864502,0.00434494,-0.037109375,-0.0077667236,-0.015930176,0.016296387,-0.028366089,-0.006008148,-0.026443481,-0.026489258,-0.0010900497,0.03125,-0.022857666,0.05392456,-0.011222839,0.02104187,0.021469116,0.009506226,0.04324341,0.036071777,-0.0018568039,-0.07183838,-0.083496094,-0.015716553,-0.0022563934,-0.009605408,-0.036315918,0.011253357,-0.007129669,-0.06384277,-0.022033691,-0.0074272156,-0.0066223145,-0.040496826,-0.004512787,-0.035858154,0.012229919,-0.011238098,-0.06665039,-0.01638794,-0.029708862,0.06616211,0.027267456,0.024276733,0.046020508,-0.016967773,0.056427002,0.030303955,-0.029708862,-0.024429321,0.020812988,-0.017059326,0.004081726,-0.0063285828,0.0060043335,-0.03878784,0.037261963,0.068847656,0.024658203,-0.018569946,-0.017166138,-0.05606079,-0.03744507,-0.03878784,0.015457153,0.0021591187,0.006198883,0.033111572,-0.034698486,-0.029632568,0.0054779053,0.0030117035,0.012748718,0.06341553,0.018127441,-0.006095886,0.018493652,0.018066406,-0.046539307,0.027572632,0.03366089,0.022216797,-0.03515625,-0.024749756,0.017166138,0.03137207,-0.025436401,0.023925781,-0.014785767,0.035095215,0.0036201477,0.019424438,0.026245117,-0.017196655,-0.021850586,-0.02444458,-0.025177002,0.036499023,0.008049011,-0.022079468,-0.03024292,-0.07574463,0.04159546,0.04800415,0.040496826,-0.013038635,0.011077881,-0.021987915,-0.020980835,-0.074401855,0.04574585,0.08081055,-0.018096924,-0.002811432,0.016677856,-0.00856781,-0.04269409,0.0024166107,-0.0053367615,-0.036743164,-0.016159058,0.0022583008,-0.04196167,0.0056877136,0.01902771,0.027648926,0.052490234,-0.008857727,-0.0501709,-0.03314209,-0.0059661865,-0.0058898926,-0.025222778,-0.0001693964,-0.015045166,0.010314941,0.032409668,-0.0036582947,0.028320312,-0.0011024475,0.005718231,-0.006084442,0.0010824203,-0.018371582,-0.028747559,0.01449585,-0.002866745,-0.06719971,0.008628845,-0.004295349,0.06774902,-0.043060303,0.03466797,-0.009880066,0.008743286,0.06512451,-0.009155273,-0.045318604,0.013839722,0.022323608,0.009361267,0.03933716,0.0038642883,-0.03540039,-0.009635925,0.06866455,-0.026489258,-0.014801025,0.0037002563,0.019104004,0.02973938,-0.004447937,-0.06286621,-0.02810669,-0.0058135986,-0.025802612,0.024978638,-0.01991272,0.033599854,-0.010307312,0.0029850006,-0.024932861,-0.0027484894,-0.02986145,0.006881714,-0.015304565,0.0056533813,-0.017547607,-0.008735657,0.02204895,0.018600464,-0.014419556,0.004016876,0.05380249,0.027389526,-0.0024280548,-0.026779175,-0.031066895,-0.014373779,0.0009522438,0.02494812,0.029159546,0.016952515,0.057861328,-0.04800415,0.01473999,0.03050232,0.020202637,0.03503418,-0.0011634827,0.02017212,-0.07446289,-0.06298828,-0.031066895,-0.040527344,0.026855469,0.013595581,0.002040863,0.05340576,0.015899658,-0.026779175,-0.0362854,0.018325806,-0.04107666,-0.015197754,0.035736084,-0.006866455,-0.021743774,0.0072135925,-0.011222839,0.010795593,0.035003662,0.016479492,0.021896362,0.06365967,0.052978516,0.0008058548,0.018432617,0.010345459,0.020828247,0.0024356842,-0.029037476,-0.029266357,-0.004711151,0.017059326,-0.017120361,-0.029754639,-0.064453125,0.046722412,0.044128418,0.082458496,0.016662598,0.0045928955,0.04058838,-0.018295288,0.014930725,-0.020736694,-0.029678345,-0.025665283,-0.048309326,0.029632568,-0.028167725,-0.009140015,-0.012817383,0.031433105,-0.00027132034,0.024978638,-0.02217102,0.053863525,-0.0018386841,-0.010658264,0.021621704,0.00166893,0.040130615,0.056365967,-0.033721924,0.027954102,0.017105103,-0.043823242,-0.002210617,0.035217285,-0.016082764,0.0028877258,-0.05291748,-0.027572632,0.005001068,0.0071105957,-0.05355835,0.0017299652,0.006214142,0.011634827,0.028930664,-0.019180298,-0.00737381,-0.008743286,-0.013694763,-0.048706055,-0.012428284,-0.024963379,0.007221222,0.04675293,-0.028503418,-0.008674622,0.006465912,-0.0028591156,0.005355835,0.01586914,0.021469116,-0.0017051697,-0.03277588,0.02508545,0.017669678,0.01525116,0.007858276,0.025848389,0.009780884,0.030044556,0.055725098,0.011528015,-0.021621704,-0.06726074,0.015548706,-0.055664062,-0.009536743,0.020828247,-0.015533447,0.0010709763,-0.017028809,-0.018981934,-0.03564453,0.004627228,-0.023468018,0.0038070679,0.023345947,-0.026062012,-0.021865845,-0.055145264,-0.015266418,0.0015239716,0.062194824,0.02520752,-0.0024414062,-0.057495117,-0.0053253174,0.017318726,0.005428314,0.027648926,-0.014144897,-0.010284424,-0.008079529,-0.02859497,-0.0045051575,-0.01625061,0.017440796,-0.0034427643,-0.008720398,0.033996582,0.0053596497,0.017028809,0.0047950745,0.008926392,0.02619934,-0.03086853,-0.006099701,-0.0064582825,0.042510986,0.00440979,-0.008651733,-0.051452637,0.043273926,0.020645142,0.02911377,-0.038208008,0.0013608932,-0.0047340393,0.007637024,0.017150879,-0.012496948,-0.018554688,-0.012878418,-0.057403564,-0.055236816,0.047607422,-0.017807007,0.027236938,0.015586853,0.007785797,0.01209259,0.0058403015,0.0036449432,0.022613525,-0.019821167,-0.007106781,-0.024093628,-0.036132812,-0.01979065,-0.0019292831,-0.010009766,0.018356323,-0.024002075,0.016860962,0.0026664734,-0.018936157,0.026062012,-0.0040740967,-0.0024356842,0.01902771,0.004508972,0.021942139,0.040618896,0.0076522827,-0.037872314,0.021347046,0.0019407272,0.0009975433,-0.0059547424,0.04788208,0.02798462,-0.011306763,-0.0054244995,-0.006866455,-0.019104004,-0.017623901,0.0039024353,-0.0017662048,0.02041626,-0.003419876,-0.047210693,0.022140503,0.010902405,-0.021881104,-0.013389587,0.017227173,0.007865906,-0.037841797,0.022659302,0.034332275,0.061157227,-0.017120361,0.0050735474,0.011505127,0.024887085,0.03378296,0.01007843,-0.010231018,0.015609741,-0.0135269165,0.02696228,0.005470276,-0.00844574,0.011924744,0.004119873,0.02835083,0.02734375,0.014091492,-0.025405884,-0.029907227,-0.0042762756,-0.009490967,-0.02545166,0.015274048,0.025863647,0.018844604,-0.025283813,0.017318726,0.013801575,-0.017166138,-0.019927979,-0.0068740845,0.032470703,-0.01826477,-0.024017334,0.009246826,0.012084961,0.04284668,-0.048339844,-0.0055160522,0.0063705444,0.0079956055,-0.029006958,-0.028060913,-0.039154053,0.011856079,0.035736084,0.0131073,0.021148682,0.034454346,-0.00248909,-0.0029716492,0.032958984,0.0009460449,-0.017089844,-0.010910034,-0.04647827,-0.013465881,0.00055122375,-0.0008921623,-0.030426025,0.0115737915,-0.011436462,-0.026748657,0.0068092346,-0.0021629333,-0.009414673,-0.017120361,0.010292053,0.042266846,-0.0070152283,0.008033752,-0.016921997,-0.033050537,-0.0014925003,0.009918213,0.019058228,-0.053100586,0.023513794,-0.022155762,-0.004787445,0.002111435,0.013595581,0.02104187,0.025375366,0.010482788,0.024795532,-0.05166626,0.042419434,-0.033355713,0.016403198,0.010978699,-0.037384033,-0.0027198792,-0.015975952,-0.012336731,0.0435791,-0.019836426,-0.015914917,-0.025375366,-0.029785156,-0.013916016,-0.05227661,0.017059326,0.038238525,0.03125,-0.01953125,0.002407074,-0.0070610046,-0.004650116,-0.025726318,0.008239746,-0.008583069,0.009338379,0.016433716,0.006225586,-0.031173706,-0.031311035,-0.017211914,0.0018177032,-0.038726807,-0.045135498,-0.01828003,0.005859375,-0.0029888153,-0.014274597,-0.027648926,-0.029678345,-0.008239746,-0.051757812,0.01979065,0.009605408,0.017944336,0.01020813,-0.017547607,-0.000037133694,0.02178955,-0.0063972473,0.033294678,0.011756897,-0.0036392212,-0.034210205,0.015274048,0.027236938,0.024139404,-0.008201599,-0.009597778,-0.0036239624,-0.020751953,-0.05105591,-0.0077667236,-0.008468628,-0.013931274,-0.008796692,-0.0042381287,-0.04724121,-0.00036120415,-0.012893677,0.00036025047,0.025375366,0.018341064,0.011924744,0.00756073,0.006378174,-0.013633728,-0.017562866,-0.029647827,0.02720642,0.010017395,0.006465912,0.025939941,0.042785645,0.0076828003,-0.02619934,0.006526947,-0.0016441345,0.020187378,-0.018157959,0.00043010712,-0.022476196,0.008270264,-0.016571045,-0.022125244,-0.043182373,-0.0051651,0.09893799,-0.005756378,-0.022613525,-0.011543274,-0.013824463,0.026306152,0.03540039,-0.038208008,0.0015993118,-0.027526855,0.01828003,-0.020141602,0.019882202,0.012741089,0.019561768,-0.023498535,-0.055755615,-0.00970459,-0.00040388107,-0.025634766,-0.0579834,-0.02178955,-0.06298828,-0.0026416779,-0.009162903,-0.023544312,-0.00025892258,0.013694763,-0.012741089,-0.089904785,-0.0009937286,0.04586792,0.008140564,0.01525116,-0.013801575,0.01625061,0.020111084,-0.038024902,-0.015838623,0.03869629,-0.034423828,-0.007801056,-0.02545166,0.011810303,-0.016616821,-0.017990112,0.025558472,0.005016327,0.021392822,-0.018096924,-0.0030841827,-0.015159607,0.019302368,-0.012031555,0.018432617,-0.0010795593,-0.010910034,0.033203125,-0.03970337,0.026641846,0.020767212,-0.005405426,0.012779236,0.030548096,0.036132812,-0.037231445,-0.015945435,0.02420044,0.012428284,0.040985107,-0.0152282715,0.034576416,0.015686035,-0.018203735,0.024383545,-0.002286911,-0.02015686,-0.049713135,-0.0135650635,0.020370483,-0.0062179565,0.010719299,-0.022262573,0.014045715,0.010559082,-0.009178162,0.013206482,-0.011734009,-0.026290894,-0.017227173,0.0036010742,0.008735657,-0.000054836273,-0.0036296844,0.021835327,0.019332886,0.03692627,0.020751953,-0.008811951,0.00094366074,0.02720642,-0.013824463,0.007873535,0.021835327,-0.0044822693,0.011077881,0.020507812,0.011856079,-0.045166016,-0.0034046173,-0.029891968,-0.01939392,-0.0065345764,-0.0030326843,-0.017944336,-0.0082473755,0.0026817322,-0.009727478,-0.028427124,0.007663727,-0.02406311,-0.033416748,-0.009506226,-0.012481689,0.021560669,-0.00036549568,0.01020813,0.02407837,0.000007927418,0.05050659,0.007587433,-0.013885498,0.04083252,0.031433105,0.00592041,-0.020019531,-0.0076446533,-0.0079574585,-0.0018787384,0.0025978088,-0.035949707,0.0051460266,0.039031982,-0.0132751465,0.0060195923,-0.00042271614,0.030151367,-0.0011043549,0.0073623657,-0.006259918,0.018615723,-0.016067505,0.035491943,-0.036499023,0.011795044,0.011962891,0.0046463013,-0.01171875,-0.003276825,-0.037109375,0.012794495,-0.0011672974,-0.019195557,0.052612305,0.0006246567,0.027938843,-0.028961182,-0.01576233,0.008041382,-0.036224365,-0.018234253,0.028579712,-0.007549286,-0.0010604858,0.018997192,-0.030914307,0.037353516,-0.03137207,0.029449463,-0.013931274,-0.0017633438,-0.0075416565,-0.021957397,-0.016098022,-0.009315491,-0.012466431,0.0074653625,-0.0006933212,0.0463562,0.018539429,0.028366089,0.051849365,0.0115737915,-0.0009212494,-0.033599854,-0.032348633,0.012298584,-0.023071289,0.020248413,-0.0132751465,0.05050659,0.04547119,0.0020809174,0.034301758,0.03149414,0.0284729,0.00028181076,0.0031719208,-0.011306763,0.0073242188,-0.011756897,0.027236938,-0.001285553,0.04345703,-0.026306152,0.027496338,0.019760132,0.02470398,-0.030151367,0.03540039,0.067871094,0.0129852295,-0.013519287,0.03427124,-0.0022029877,-0.013168335,-0.009994507,-0.018371582,0.053741455,0.014595032,0.050476074,0.05029297,0.015075684,-0.006164551,0.025161743,-0.034362793,-0.033325195,0.06829834,0.02494812,-0.023330688,-0.011329651,-0.010772705,0.0033473969,-0.049804688,-0.03527832,0.023727417,0.00087213516,0.018630981,-0.006515503,-0.003025055,-0.0118255615,0.016830444,0.037628174,0.017562866,-0.018066406,0.027389526,0.03050232,0.0016355515,0.018875122,-0.0007147789,0.032470703,-0.035736084,-0.02507019,0.011199951,0.02204895,-0.01600647,-0.007858276,0.016067505,0.002702713,0.050933838,0.045196533,-0.016174316,0.014083862,0.0440979,0.011909485,-0.0046653748,0.05029297,0.035583496,0.012420654,0.04559326,0.036071777,0.03012085,-0.03945923,0.017578125,0.0025539398,0.00459671,-0.0048675537,-0.012756348,-0.00374794,-0.019592285,0.01713562,-0.0016260147,-0.01574707,0.014701843,0.024108887,0.005466461,-0.004016876,-0.0015697479,0.012084961,-0.018218994,0.0012254715,0.015914917,-0.010360718,0.032409668,0.008407593,0.027572632,-0.025726318,0.030273438,-0.0048828125,-0.014595032,-0.0051727295,0.028015137,-0.033843994,0.005256653,-0.0012378693,0.0065956116,-0.04537964,0.014457703,0.03567505,-0.011817932,0.037719727,0.0065231323,0.0008158684,0.001914978,0.020019531,0.0064926147,0.000085651875,-0.014709473,-0.030426025,0.03652954,0.045135498,0.0075950623,0.020401001,-0.014007568,-0.0031490326,0.010650635,-0.0010824203,-0.006164551,-0.011299133,-0.025665283,-0.030319214,0.0032978058,0.026290894,0.020874023,0.046173096,0.00076675415,-0.021911621,0.020767212,0.031341553,0.00756073,-0.002878189,-0.009994507,0.029754639,-0.010620117,0.053100586,0.029525757,0.0062828064,0.03225708,-0.018127441,-0.026062012,0.010650635,-0.003080368,0.022750854,-0.012466431,0.007091522,-0.0032978058,0.022567749,-0.021484375,-0.04147339,0.009811401,-0.01121521,-0.013465881,-0.02432251,0.0057792664,0.0071372986,0.030761719,0.04067993,0.014419556,-0.03375244,0.061920166,-0.018432617,0.0496521,-0.0037288666,-0.015151978,0.048339844,0.037139893,0.044677734,0.024398804,0.024902344,-0.03604126,0.02330017,0.043151855,0.020248413,0.00983429,0.006362915,-0.026260376,0.034088135,0.008224487,0.024749756,-0.014289856,0.005592346,0.0053710938,-0.0012893677,0.0020923615,0.000052452087,-0.008636475,0.0054893494,0.039398193,-0.03439331,-0.015823364,-0.021087646,-0.009338379,0.02911377,-0.01008606,0.00058698654,-0.00043010712,-0.030395508,0.015945435,-0.024673462,-0.02519226,0.0002439022,0.025390625,-0.031143188,-0.018356323,0.00043678284,0.012786865,-0.017791748,0.028839111,0.020614624,0.00051498413,0.009101868,0.04522705,-0.0140686035,0.028137207,-0.016098022,0.021072388,0.027938843,0.0009036064,-0.014175415,0.0052108765,0.013504028,-0.0135650635,0.009315491,0.036132812,-0.010719299,0.0039138794,0.0013227463,-0.0181427,0.007904053,0.00020122528,-0.006378174,0.0021858215,-0.013160706,-0.010269165,-0.0059814453,0.0058898926,0.0035629272,0.011421204,-0.0070228577,-0.008323669,0.009140015,0.037750244,0.021759033,-0.04196167,-0.003616333,0.004714966,0.010749817,-0.031799316,-0.0102005005,0.0045700073,-0.028701782,0.017181396,0.014625549,0.0056266785,0.016082764,-0.020263672,0.0022029877,0.024169922,0.018798828,0.02243042,0.001739502,0.0018806458,0.02015686,-0.020980835,-0.0031757355,-0.0055389404,-0.0036582947,0.0131073,0.020736694,-0.007911682,-0.031707764,0.027755737,-0.005771637,0.01525116,0.009712219,-0.01876831,0.014427185,-0.013557434,-0.008041382,0.00030183792,0.018569946,-0.01322937,-0.0129470825,-0.017532349,0.024139404,0.052612305,-0.009757996,-0.011962891,0.022155762,0.0070228577,0.023727417,0.029418945,0.008239746,0.036224365,0.02229309,-0.020462036,-0.021636963,0.01184082,-0.009300232,-0.03363037,0.017944336,-0.015174866,-0.014533997,0.017623901,0.009674072,-0.007156372,-0.02671814,-0.020874023,-0.011772156,-0.023635864,0.017578125,-0.015914917,0.010429382,-0.019210815,-0.00856781,0.005115509,-0.020401001,-0.045135498,-0.030807495,-0.0021419525,-0.013069153,-0.05319214,0.007194519,-0.030471802,0.014404297,-0.019699097,0.00078487396,-0.012748718,0.029556274,-0.015670776,-0.008979797,0.0107421875,0.022354126,0.018371582,0.013031006,0.027832031,-0.022460938,-0.023361206,-0.02760315,0.00044679642,-0.01574707,0.01927185,0.004131317,0.035308838,0.023651123,-0.0034313202,-0.00095415115,-0.015235901,-0.00409317,-0.008926392,-0.031097412,-0.018493652,0.023605347,0.010917664,-0.013191223,-0.013183594,0.043762207,-0.027648926,-0.024215698,0.024230957,0.04562378,-0.00020337105,0.035003662,-0.012664795,-0.016189575,-0.0063285828,0.0029392242,-0.0134887695,0.015083313,0.00617218,0.0025806427,-0.002035141,-0.0026950836,0.024169922,-0.012619019,-0.006866455,0.021148682,-0.00032639503,-0.014404297,0.03527832,0.011978149,0.01134491,-0.00995636,-0.011428833,0.010719299,0.03652954,0.011077881,0.004421234,-0.004386902,0.007785797,-0.020965576,0.0115356445,0.020217896,-0.00957489,-0.039642334,-0.015159607,-0.036743164,0.019042969,0.0044670105,0.011169434,-0.000113904476,0.0103302,-0.026641846,-0.025039673,-0.01876831,0.031280518,0.0134887695,-0.0046424866,-0.012580872,0.0105896,0.022323608,-0.03366089,-0.0014619827,-0.04083252,-0.035369873,-0.0066947937,-0.028015137,0.024276733,0.015808105,-0.003004074,0.004699707,-0.0021038055,-0.001616478,-0.0061035156,0.029266357,-0.015457153,-0.0062294006,0.026901245,0.00497818,-0.024337769,0.01474762,-0.010292053,-0.0026130676,0.018630981,-0.003917694,0.0041503906,-0.021591187,0.037506104,-0.008132935,-0.0046958923,0.029708862,0.0034694672,0.011436462,-0.03857422,0.009498596,0.003736496,-0.003967285,0.037384033,-0.029968262,-0.022994995,0.0072402954,-0.029296875,-0.03427124,0.000790596,0.02015686,0.0340271,-0.010475159,0.03475952,-0.012237549,-0.01638794,0.023757935,0.009269714,-0.026062012,-0.010299683,0.029556274,0.010063171,-0.005634308,-0.0053482056,-0.011116028,-0.029754639,-0.007659912,0.018692017,-0.008094788,-0.013671875,0.02230835,0.010368347,0.043823242,-0.008117676,0.017822266,0.021255493,0.015098572,0.025100708,-0.009742737,0.048583984,-0.008979797,-0.03805542,0.010520935,-0.0046691895,-0.03186035,-0.010269165,-0.0077934265,-0.0047302246,-0.04244995,0.013824463,0.0063095093,0.03274536,-0.026260376,0.010192871,-0.025405884,-0.009559631,-0.0446167,-0.0154418945,-0.02268982,0.015609741,0.039642334,0.00667572,0.0158844,0.0020866394,-0.024414062,0.015975952,0.044830322,-0.010360718,-0.027908325,-0.019470215,0.008346558,0.0041503906,0.013084412,0.012367249,-0.008773804,-0.022155762,-0.00090169907,-0.015113831,0.009841919,-0.0046310425,0.0082473755,-0.002538681,-0.008277893,-0.008666992,0.024551392,-0.0046958923,-0.008506775,0.0066604614,0.012397766,0.043518066,0.03189087,-0.007297516,0.016281128,0.030059814,-0.033447266,0.05105591,-0.0072135925,0.021820068,-0.01626587,-0.0009531975,-0.04034424,-0.025772095,-0.009216309,-0.00749588],"createdAt":"2026-04-18T18:49:59.046Z","updatedAt":"2026-04-23T14:01:23.929Z","lastSeenAt":"2026-04-23T14:01:23.929Z","tsv":"'/api/v1/payments/25':56,170 '/request':13,28,161 '0.02':12,27,72,160 '000':75 '0x1a2b':228 '0x8335':222 '20':74 '2913':223 '402':211 '6':81 '85f3':229 'Base network API' 'USDC micropayment API' 'access':7,22,42,61,187 'across':118 'actual':252 'addit':247 'address':227 'advertis':116 'ai':128 'analysi':132 'analyt':122 'api':6,21,40,60,87,186 'base':9,24,50,76,85,225 'base-network' 'broader':114 'call':4,19,67,213 'carri':108 'categori':120 'challeng':209 'classif':135 'clear':173 'collect':34 'commit':93 'connect':242 'contract':221 'convers':152 'crypto-paid endpoint' 'data':121,125,194 'decim':82 'descript':182 'doc':231 'document':191,249 'embed':136 'endpoint':41,54,117,156,166,200,257 'estim':146 'exchang':141 'export':126 'feed':140 'financ':137 'four':119 'function':196 'gas':145 'generat':153 'geocod':150 'header':107 'host':32 'howev':163 'http':210 'individu':99 'infrastructur':148 'insight':127 'key':88 'label':58 'learn':130 'limit':90 'list':155,168 'live':202 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':129 'map':174 'metric':123 'name':179 'need':95 'network':51 'no-api-key' 'page':235 'paid':100 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':46,68,106,215,216 'per':3,18,38,66 'per-cal':65 'platform':115 'post-method' 'premium':5,20,59,185 'premium API access' 'price':139,162,232 'prompt':244 'protocol':47 'quot':144 'rate':89,142 'readm':234 'report':124 'request':39,97 'request/response':253 'requir':63 'respond':204 'return':198,239 'schema':254 'sentiment':131 'servic':180 'settl':83,218 'share':157 'sign':110 'simpli':184 'site':238 'specif':53,165 'summar':134 'technic':248 'text':133 'token':143 'transact':112 'unit':77 'unknown':259 'upfront':92 'usdc':15,30,73,79,111,220 'usdc-settlement' 'use':102 'util':149 'valid':151,207 'via':10,25,43 'wallet':243 'web3':138 'without':214 'x':105 'x-payment':104 'x402':11,26,45,208 'x402 API' 'x402-payment'","prices":[{"id":"96ff427c-dacd-414f-bd10-b803203e2f1d","listingId":"ef8face1-9f46-44c2-97e0-39579ceca755","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:49:59.046Z"}],"sources":[{"listingId":"ef8face1-9f46-44c2-97e0-39579ceca755","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:49:59.046Z","lastSeenAt":"2026-04-23T14:01:23.929Z"}],"details":{"listingId":"ef8face1-9f46-44c2-97e0-39579ceca755","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/25 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/25"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/25"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Listed API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per request for API access without needing API keys or subscriptions","Agent-driven workflows that settle API costs in USDC on Base","Accessing premium data or services with instant crypto micropayments"],"bestFor":["Developers who want keyless, pay-as-you-go API access","AI agents with x402-compatible wallets on Base","Users who prefer per-call billing over subscription plans"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk/discounted pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:08.408Z"},"updatedAt":"2026-04-23T14:01:23.929Z"}}