{"id":"a6bb77b2-f073-49d7-9e07-d3bf92c87611","shortId":"uV8yJm","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network 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. This specific endpoint (`/api/endpoint-12`) is listed as \"Premium API Access\" and accepts USDC payments on Base. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the site's uniform $0.02/request pricing across all endpoints.\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 endpoints are priced identically at $0.02 per call with no API keys, no rate limits, and no minimum commitments required.\n\nHowever, this particular endpoint (`/api/endpoint-12`) does not correspond to any of the named endpoints listed on the site's landing page, and no documentation, input/output schema, or usage examples are available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually does, its practical utility is unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","json-response"],"categories":["api-platform","crypto-payments"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","low payment fee API","402 payment endpoint"],"warnings":["Endpoint path /api/endpoint-12 does not match any of the named endpoints listed on the provider's landing page — its actual functionality is unknown.","No input schema, output schema, or usage examples are available.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content.","No OpenAPI spec, ai-plugin manifest, or agents.txt discovered."],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-12","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/endpoint-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no examples, and the endpoint path does not match any named service on the site. The docs pages are empty. It 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":"2026-04-18T23:48:29.766Z","embedding":[-0.029037476,-0.046051025,0.050445557,0.017227173,0.0061798096,-0.018539429,-0.022460938,0.022476196,0.076049805,-0.064697266,0.025985718,-0.04626465,-0.038085938,-0.037597656,-0.021469116,0.008903503,-0.003255844,-0.0017585754,-0.027542114,0.028182983,0.0287323,-0.018630981,-0.03845215,0.020980835,0.005393982,-0.006702423,-0.0004298687,-0.0019664764,-0.01171875,-0.041748047,0.038116455,-0.025222778,-0.00667572,0.008460999,-0.016357422,-0.008178711,-0.001613617,0.024230957,0.023345947,0.0051727295,-0.00056648254,-0.055480957,-0.0005440712,-0.022888184,-0.05532837,-0.013214111,0.0090408325,-0.021057129,0.00806427,0.002521515,-0.030288696,-0.0071640015,-0.012191772,-0.001083374,0.0012836456,-0.0011367798,0.0021648407,-0.0093307495,0.015716553,0.025039673,0.004299164,-0.064697266,-0.021575928,-0.002029419,0.0022296906,0.062347412,-0.0093307495,0.041290283,0.00299263,0.06939697,0.028060913,0.05456543,0.026138306,0.009979248,0.0011749268,-0.012420654,-0.007534027,0.04244995,-0.012298584,-0.022735596,-0.012321472,-0.0061569214,-0.050842285,0.0004594326,-0.022918701,-0.04748535,-0.020324707,0.0236969,-0.022232056,0.02180481,-0.07727051,-0.010093689,-0.008834839,-0.0033512115,-0.0013046265,-0.010627747,-0.0041389465,0.022994995,-0.0038890839,0.008514404,-0.0024433136,-0.052459717,0.01878357,0.009178162,0.027282715,0.04006958,0.032043457,0.022109985,0.013366699,-0.0033035278,-0.025360107,0.022094727,-0.018707275,-0.009857178,0.013442993,0.0021247864,-0.006877899,0.016952515,-0.033935547,0.023880005,-0.046081543,0.05041504,0.0076942444,0.0059776306,0.005092621,-0.045074463,-0.020843506,0.013511658,-0.020965576,-0.01033783,0.025756836,0.01939392,0.014755249,-0.018325806,-0.024307251,0.00920105,-0.028289795,-0.017333984,-0.043701172,-0.026016235,0.04034424,-0.025054932,0.02078247,0.041229248,-0.10211182,0.005382538,-0.049713135,0.008049011,-0.028366089,-0.008605957,0.0036334991,0.02330017,-0.013626099,-0.021484375,-0.029220581,-0.028701782,0.0030651093,0.023208618,-0.01966858,0.050201416,-0.01512146,0.020050049,0.02961731,0.019439697,0.022140503,0.030136108,-0.0018692017,-0.08276367,-0.08074951,-0.020523071,-0.009552002,-0.026916504,-0.020431519,0.005168915,-0.0020942688,-0.061767578,-0.02078247,-0.022445679,0.0066070557,-0.035949707,0.005596161,-0.04574585,0.010177612,0.005092621,-0.062347412,-0.021560669,-0.025222778,0.053619385,0.031219482,0.028808594,0.031021118,-0.01687622,0.063964844,0.028503418,-0.025924683,-0.017837524,0.02168274,-0.010276794,0.02267456,-0.003452301,0.008522034,-0.024658203,0.039154053,0.07147217,0.008773804,-0.014701843,-0.013679504,-0.068237305,-0.032562256,-0.034973145,0.02468872,0.025787354,-0.0021152496,0.039031982,-0.039642334,-0.036987305,-0.0006465912,0.015327454,-0.0012178421,0.0579834,0.01272583,0.0060653687,0.027908325,0.016952515,-0.0647583,0.029205322,0.033172607,0.007080078,-0.023483276,-0.026657104,0.024108887,0.036071777,-0.02017212,0.016983032,-0.021484375,0.019958496,-0.021713257,0.0029201508,0.008918762,-0.012428284,-0.026733398,-0.030212402,-0.022888184,0.025970459,-0.0030651093,-0.02658081,-0.034820557,-0.07525635,0.054138184,0.039245605,0.034240723,0.00022280216,0.017929077,-0.021575928,-0.0026245117,-0.068237305,0.06213379,0.06335449,-0.0062446594,-0.0154953,0.014251709,-0.009742737,-0.03817749,0.008010864,-0.018127441,-0.035369873,-0.024383545,0.021911621,-0.045135498,0.003540039,0.017852783,0.025527954,0.04284668,-0.0064430237,-0.060791016,-0.015426636,-0.011352539,0.010231018,-0.032684326,-0.0009756088,-0.0011930466,0.011390686,0.022598267,0.001499176,0.016555786,-0.0037155151,-0.00019967556,0.003786087,0.0079574585,-0.010215759,-0.026611328,0.009849548,-0.0051574707,-0.062683105,0.0032615662,0.0036754608,0.075927734,-0.061462402,0.038330078,-0.0077667236,0.0070991516,0.05807495,-0.0059394836,-0.05606079,0.0057678223,0.013214111,0.020736694,0.04788208,0.02130127,-0.027038574,-0.013259888,0.072753906,-0.010017395,-0.003791809,0.015029907,0.008178711,0.04486084,-0.0024471283,-0.051727295,-0.033203125,0.0053482056,-0.039001465,0.025787354,-0.024459839,0.03225708,-0.010093689,0.0022830963,-0.020050049,-0.009292603,-0.024734497,0.0030212402,-0.01637268,0.011047363,-0.013252258,-0.00667572,0.008285522,0.0054359436,-0.0059127808,0.0061416626,0.037597656,0.021011353,-0.0062561035,-0.017913818,-0.029037476,-0.005542755,-0.005722046,0.014015198,0.014129639,0.021560669,0.04940796,-0.04458618,0.006942749,0.025360107,0.014015198,0.031829834,-0.00005120039,0.0030784607,-0.0758667,-0.059814453,-0.025405884,-0.03970337,0.030212402,0.02128601,-0.011726379,0.04534912,0.014549255,-0.025161743,-0.041229248,0.013420105,-0.04046631,-0.0021858215,0.039520264,-0.026763916,-0.028884888,0.0030174255,0.0008611679,0.00038456917,0.039398193,0.016021729,0.025436401,0.06951904,0.041992188,0.0046653748,0.014183044,0.008842468,0.026367188,0.009407043,-0.024597168,-0.030960083,-0.016937256,0.03363037,-0.02218628,-0.018676758,-0.07287598,0.06188965,0.035888672,0.089782715,0.019317627,0.0059776306,0.03265381,-0.024291992,0.019882202,-0.036071777,-0.023849487,-0.01979065,-0.048217773,0.03237915,-0.0149002075,-0.00038027763,-0.018585205,0.03878784,-0.0054779053,0.019958496,-0.024124146,0.044769287,-0.00843811,0.0043144226,0.01576233,0.012084961,0.046173096,0.06915283,-0.037353516,0.031433105,0.031036377,-0.024963379,0.00894165,0.03878784,-0.014167786,-0.0041885376,-0.06048584,-0.018997192,-0.011222839,-0.012687683,-0.048187256,0.0067749023,-0.00045752525,0.023162842,0.02709961,0.0025596619,-0.016815186,-0.0039520264,-0.013572693,-0.05130005,-0.0032291412,-0.042785645,0.008712769,0.049560547,-0.018066406,-0.013694763,-0.003665924,-0.019378662,-0.011352539,0.0087509155,0.026367188,-0.00415802,-0.038391113,0.03289795,0.007194519,0.014770508,0.018539429,0.04852295,0.020355225,0.03768921,0.046447754,0.021209717,-0.015365601,-0.054870605,0.025817871,-0.064819336,0.0062332153,0.025054932,-0.027618408,0.004802704,-0.016342163,-0.0357666,-0.019485474,0.014183044,-0.03125,-0.008926392,0.02192688,-0.010253906,-0.046569824,-0.043792725,-0.034606934,-0.0067214966,0.06518555,0.020599365,0.026473999,-0.06188965,-0.009773254,0.027069092,0.0070724487,0.033447266,-0.014274597,-0.012741089,-0.014770508,-0.03451538,-0.008102417,-0.017578125,0.025543213,-0.006084442,-0.010566711,0.018249512,0.018447876,0.03062439,0.0082473755,0.013809204,0.028686523,-0.024276733,-0.01259613,-0.013549805,0.042633057,0.01373291,-0.0056762695,-0.054504395,0.045928955,0.012763977,0.023025513,-0.035736084,-0.007282257,-0.010643005,0.01374054,0.008720398,-0.017196655,-0.010566711,-0.008399963,-0.049041748,-0.057525635,0.050567627,-0.021865845,0.032928467,0.019485474,0.0049057007,0.02468872,-0.0016479492,-0.0028591156,0.018005371,-0.028289795,-0.007850647,-0.01979065,-0.025146484,-0.01979065,-0.013366699,-0.029724121,0.026397705,-0.024261475,0.015029907,0.0027942657,-0.02658081,0.015975952,-0.008552551,0.003967285,0.015220642,-0.011436462,0.022125244,0.03967285,0.010597229,-0.053466797,0.031143188,-0.0018930435,0.013252258,0.0026683807,0.04611206,0.031707764,0.0002515316,-0.00995636,-0.015602112,-0.012489319,-0.024414062,-0.003314972,0.0035095215,0.008872986,-0.007411957,-0.031677246,0.014678955,0.008018494,-0.02609253,-0.03353882,0.018188477,0.010498047,-0.03050232,0.022415161,0.03375244,0.05871582,-0.022979736,-0.005809784,0.004009247,0.028518677,0.039642334,0.01234436,-0.01928711,0.018661499,-0.0057640076,0.012886047,0.0027923584,-0.011764526,0.026168823,0.0042877197,0.029327393,0.026992798,-0.00025200844,-0.019454956,-0.028945923,0.0047912598,-0.012161255,-0.026763916,0.034118652,0.02281189,0.037139893,-0.029205322,0.016433716,0.020263672,-0.018829346,-0.016677856,-0.004459381,0.03866577,-0.016418457,-0.022384644,0.018493652,0.020523071,0.028335571,-0.057739258,0.005393982,-0.009132385,0.016540527,-0.025314331,-0.04156494,-0.042785645,0.011978149,0.035217285,0.015670776,0.02722168,0.029556274,-0.006111145,0.0076446533,0.0256958,-0.0057029724,-0.008178711,-0.025054932,-0.048553467,-0.020019531,-0.01991272,-0.0022087097,-0.033599854,0.0070152283,-0.0020179749,-0.033935547,0.0029678345,-0.015129089,-0.000023245811,-0.0023708344,0.011184692,0.03289795,0.004310608,0.013847351,-0.014549255,-0.032714844,-0.0001963377,0.0066947937,0.018127441,-0.038269043,0.01499176,-0.010871887,-0.0051612854,0.011871338,0.018341064,0.025863647,0.023223877,0.01247406,0.029403687,-0.045196533,0.039764404,-0.033203125,0.01789856,0.002729416,-0.036743164,-0.018966675,-0.022232056,-0.01576233,0.038635254,-0.021087646,-0.007255554,-0.02444458,-0.03515625,-0.0124435425,-0.05114746,0.013496399,0.04296875,0.03515625,-0.021499634,0.0027484894,-0.0015792847,0.008125305,-0.006088257,0.005756378,-0.013626099,0.024490356,0.025634766,0.006500244,-0.031204224,-0.019180298,-0.017913818,-0.0042648315,-0.033447266,-0.04776001,-0.020767212,-0.000032365322,-0.0032730103,-0.0053520203,-0.028884888,-0.029800415,-0.0018997192,-0.043273926,0.0075531006,0.008544922,0.014755249,0.008621216,-0.023910522,-0.000664711,0.0072364807,-0.024307251,0.040740967,0.01184845,-0.0076065063,-0.039398193,0.007637024,0.024719238,0.018096924,0.0038871765,-0.02154541,-0.01272583,-0.025222778,-0.059387207,0.002544403,-0.0039749146,-0.011352539,-0.004169464,0.006000519,-0.053771973,0.003129959,-0.017486572,0.0071907043,0.021240234,0.0031337738,0.010955811,0.0011672974,0.011482239,-0.012664795,-0.008171082,-0.03488159,0.022979736,0.0104904175,0.0035095215,0.033447266,0.049438477,-0.0014839172,-0.014511108,0.0104904175,0.017318726,0.016616821,-0.029067993,0.012931824,-0.014663696,0.008926392,-0.0046806335,-0.014640808,-0.036010742,0.00085401535,0.080566406,-0.0023441315,-0.0030117035,-0.012207031,-0.02722168,0.019714355,0.029296875,-0.040893555,-0.0063209534,-0.031677246,0.013381958,-0.023803711,0.015899658,0.002002716,0.028060913,-0.010955811,-0.04309082,-0.022369385,0.0014648438,-0.0053901672,-0.06512451,-0.035827637,-0.07067871,0.00020158291,-0.012680054,-0.026229858,-0.0010824203,0.005203247,-0.023132324,-0.07763672,0.0017681122,0.04071045,0.0044937134,0.028442383,0.0013980865,0.023483276,0.02935791,-0.033935547,-0.004005432,0.033599854,-0.028625488,-0.0076179504,-0.019760132,0.019577026,-0.012573242,-0.01852417,0.015083313,0.010055542,0.005935669,-0.006729126,0.017318726,-0.007091522,0.021972656,-0.018875122,0.023162842,-0.014404297,-0.0078048706,0.040100098,-0.043701172,0.019180298,0.0154418945,-0.007045746,-0.001033783,0.029953003,0.044433594,-0.038757324,-0.011703491,0.021057129,0.00969696,0.03933716,-0.02658081,0.035858154,0.013648987,-0.023834229,0.008087158,-0.00762558,-0.016433716,-0.029281616,-0.03363037,0.022476196,-0.013496399,0.012588501,-0.02557373,0.0009293556,0.017730713,0.017440796,0.013183594,-0.010719299,-0.023910522,-0.02507019,-0.0038795471,-0.0049438477,0.0043144226,-0.0057525635,0.01576233,0.024780273,0.036499023,0.009552002,-0.013343811,0.006477356,0.029907227,-0.018188477,0.002412796,0.024642944,0.005718231,0.01676941,0.020324707,0.0149383545,-0.042633057,-0.01776123,-0.019165039,-0.016586304,0.0004930496,-0.013191223,-0.011108398,-0.00667572,0.010795593,-0.011405945,-0.02696228,0.001200676,-0.023895264,-0.036346436,-0.0028629303,-0.01838684,0.031097412,0.015838623,0.006111145,0.007209778,-0.007980347,0.032226562,-0.0016183853,-0.019927979,0.035369873,0.028701782,0.020965576,-0.03250122,-0.0038032532,-0.014717102,-0.009017944,0.0022697449,-0.03463745,0.005794525,0.04537964,-0.016662598,0.0051727295,0.0057907104,0.02180481,-0.007091522,0.012161255,-0.0058135986,0.016998291,-0.011962891,0.03640747,-0.04953003,0.019317627,0.011436462,0.010482788,-0.015426636,-0.016189575,-0.027282715,0.018951416,0.012458801,-0.013420105,0.051635742,0.0065612793,0.028762817,-0.024368286,-0.0104599,0.009284973,-0.025039673,-0.016845703,0.035217285,-0.005470276,0.000082850456,0.010002136,-0.031036377,0.034057617,-0.035858154,0.01423645,0.0040740967,0.015426636,-0.004135132,-0.026290894,-0.010169983,-0.015068054,-0.013824463,0.0087890625,0.003917694,0.043762207,0.0104904175,0.030288696,0.047821045,0.023910522,0.00472641,-0.042663574,-0.03265381,0.0035743713,-0.019851685,0.019485474,-0.014907837,0.058563232,0.03050232,0.009674072,0.040374756,0.028335571,0.037994385,0.012138367,0.0064353943,-0.014457703,0.0056266785,-0.0007209778,0.0135650635,0.0013637543,0.046905518,-0.034240723,0.031463623,0.009498596,0.033111572,-0.031463623,0.037322998,0.066101074,0.01171875,-0.018295288,0.041992188,-0.0016679764,-0.011909485,-0.010498047,-0.014793396,0.051940918,0.006416321,0.055541992,0.046936035,0.0107040405,-0.0031585693,0.009933472,-0.034088135,-0.024932861,0.059814453,0.031585693,-0.026397705,-0.0068473816,-0.0026245117,0.0064201355,-0.045928955,-0.033081055,0.024124146,-0.009010315,0.0037670135,-0.0063056946,-0.004875183,-0.012535095,0.019943237,0.020233154,0.00907135,-0.013137817,0.03125,0.031799316,-0.009292603,0.02947998,-0.004917145,0.030426025,-0.026687622,-0.020248413,0.014251709,0.022384644,-0.0051956177,-0.008850098,0.019577026,0.005756378,0.036346436,0.04156494,-0.018341064,0.013168335,0.028518677,0.010047913,-0.007171631,0.05517578,0.03375244,0.013771057,0.040771484,0.024841309,0.03894043,-0.031341553,0.021392822,-0.0031490326,0.0010051727,-0.008804321,-0.0033836365,0.012435913,-0.011459351,0.0077934265,0.0015802383,-0.015792847,0.02420044,0.034088135,-0.011802673,-0.0012950897,-0.010414124,0.0017175674,-0.024169922,-0.005836487,0.012825012,-0.018371582,0.047302246,0.017364502,0.037841797,-0.020187378,0.029144287,-0.00064754486,-0.015274048,-0.0013217926,0.027923584,-0.030471802,0.014053345,-0.0021095276,-0.0021533966,-0.055847168,0.020767212,0.030288696,-0.018585205,0.025024414,0.0014781952,-0.005634308,0.0009255409,0.024932861,0.012878418,-0.0054130554,-0.0029907227,-0.026107788,0.036468506,0.05026245,0.0009918213,-0.0011730194,-0.026443481,-0.002910614,0.007709503,0.006225586,-0.010864258,-0.0090408325,-0.017227173,-0.03274536,0.02178955,0.03753662,0.027389526,0.05203247,-0.019577026,-0.007965088,0.0020332336,0.040985107,0.00019490719,-0.01020813,-0.0079193115,0.013908386,-0.019714355,0.041229248,0.027297974,0.010131836,0.038024902,0.0011463165,-0.023742676,0.0073776245,-0.012046814,0.022521973,-0.018081665,0.0038089752,-0.0079574585,0.0259552,-0.018981934,-0.03869629,0.010353088,-0.017059326,-0.031982422,-0.019317627,0.01335144,0.011009216,0.02973938,0.038909912,0.028396606,-0.020446777,0.060272217,-0.012321472,0.040893555,-0.0007696152,-0.0068473816,0.053100586,0.013549805,0.038208008,0.016860962,0.014976501,-0.041381836,0.018447876,0.03567505,0.01828003,0.00920105,0.004501343,-0.014213562,0.04135132,-0.0054092407,0.030059814,-0.011054993,0.0023918152,0.015037537,-0.0062026978,-0.0029830933,-0.0033912659,-0.011894226,0.012382507,0.0519104,-0.024353027,-0.0017652512,-0.015274048,-0.012481689,0.030181885,-0.01600647,0.011993408,0.0016031265,-0.023132324,0.012191772,-0.029129028,-0.026473999,0.0010519028,0.027542114,-0.053375244,-0.018127441,0.011291504,0.024353027,-0.018341064,0.037597656,0.023132324,0.004714966,0.0047302246,0.045532227,-0.010391235,0.02947998,-0.02645874,0.01361084,0.037750244,0.0066108704,-0.020370483,0.002620697,0.0098724365,-0.012969971,0.02178955,0.043304443,-0.0066833496,0.009635925,-0.0062179565,-0.010696411,0.003189087,0.00009423494,-0.015701294,0.008422852,-0.017578125,-0.015235901,0.0019226074,0.0030574799,-0.0027217865,-0.0050086975,-0.02468872,-0.01689148,0.008110046,0.032104492,0.018493652,-0.0317688,-0.0019445419,0.008010864,0.019073486,-0.0234375,-0.008331299,0.0045166016,-0.037078857,0.007423401,0.005405426,0.008575439,0.01234436,-0.020812988,0.0033454895,0.030288696,0.019500732,0.028778076,0.0010719299,0.0001257658,0.017593384,-0.008659363,-0.002216339,0.00065898895,-0.015235901,0.013519287,0.023742676,0.006259918,-0.024658203,0.025466919,-0.012199402,0.022125244,-0.0045700073,-0.022140503,0.018920898,-0.011634827,-0.007461548,0.0024642944,0.016296387,-0.010009766,-0.013175964,-0.012031555,0.036590576,0.05819702,-0.02130127,-0.011734009,0.02557373,0.026626587,0.0124053955,0.0357666,0.009048462,0.044891357,0.023162842,-0.020629883,-0.027404785,0.027923584,-0.011299133,-0.024871826,0.012557983,-0.016693115,-0.016815186,0.016403198,0.011909485,-0.0072746277,-0.028656006,-0.0077934265,-0.0181427,-0.0181427,0.015571594,-0.016326904,0.0149383545,-0.032836914,-0.0093688965,0.0011615753,-0.034332275,-0.0446167,-0.022262573,0.0012216568,-0.007080078,-0.05050659,0.0047836304,-0.028366089,0.013954163,-0.035614014,-0.00617218,-0.019943237,0.015289307,-0.013313293,-0.0057144165,0.004196167,0.022872925,0.0262146,0.006454468,0.025527954,-0.032440186,-0.022613525,-0.018707275,0.0061569214,-0.0070266724,0.018920898,0.0005674362,0.033721924,0.026519775,-0.008514404,-0.0016965866,-0.006526947,-0.014350891,-0.010955811,-0.01838684,-0.020263672,0.021194458,0.010482788,-0.011398315,-0.019134521,0.03591919,-0.019515991,-0.015960693,0.03427124,0.04385376,0.012451172,0.025970459,-0.00995636,-0.011451721,-0.014091492,0.0067481995,-0.020462036,0.0135650635,0.0045661926,0.0006337166,-0.004421234,0.0070152283,0.023712158,-0.0010623932,-0.0055236816,0.025161743,0.0037822723,-0.004173279,0.03149414,0.010017395,-0.00012898445,-0.018157959,-0.007598877,0.023773193,0.05493164,0.010101318,0.0060577393,-0.0032234192,0.0029010773,-0.016067505,0.009315491,0.01727295,-0.018707275,-0.04135132,-0.015808105,-0.030136108,0.022613525,-0.00043058395,0.014122009,-0.009490967,0.022201538,-0.02130127,-0.02935791,-0.022949219,0.028961182,0.018875122,-0.008766174,-0.0015773773,0.004589081,0.0041542053,-0.03982544,0.000259161,-0.04510498,-0.03692627,-0.0049858093,-0.025909424,0.018585205,0.012512207,-0.007083893,-0.007091522,-0.010986328,-0.0033283234,-0.00038170815,0.020706177,-0.016586304,-0.00756073,0.030761719,0.019104004,-0.012214661,0.022583008,-0.018447876,0.0011558533,0.024261475,-0.013793945,0.015602112,-0.018615723,0.03439331,-0.010612488,0.0038833618,0.018859863,-0.008575439,0.0062713623,-0.03829956,0.0037250519,-0.0059127808,-0.0043754578,0.033081055,-0.030517578,-0.027954102,0.0061454773,-0.0126953125,-0.03024292,0.0014686584,0.015342712,0.03302002,-0.010215759,0.052947998,-0.017593384,-0.01374054,0.017700195,0.004825592,-0.024780273,0.011459351,0.028244019,-0.0017499924,-0.001288414,-0.0017261505,-0.0039596558,-0.03149414,-0.004047394,0.008453369,-0.003873825,-0.008476257,0.029724121,0.018356323,0.04776001,-0.004722595,0.024383545,0.0030288696,0.0014076233,0.026885986,0.0076179504,0.05480957,-0.00056791306,-0.019577026,0.0037441254,0.0042495728,-0.023590088,0.0041007996,-0.00060272217,-0.0023593903,-0.03894043,0.021606445,-0.01146698,0.017318726,-0.018875122,0.022003174,-0.021820068,-0.0079193115,-0.037994385,-0.0028915405,-0.02494812,0.013328552,0.020935059,-0.0005302429,0.027908325,0.004802704,-0.028442383,0.014343262,0.04309082,-0.0019550323,-0.038848877,-0.01713562,0.012428284,0.002773285,0.014404297,0.0011615753,-0.017837524,-0.017211914,0.0031108856,-0.016906738,0.0017986298,-0.004524231,0.020217896,0.0056266785,-0.009681702,-0.00025773048,0.030319214,-0.008049011,0.00025868416,0.008575439,0.009002686,0.034118652,0.031341553,-0.012481689,0.015144348,0.014404297,-0.0317688,0.05859375,0.0018005371,0.022872925,-0.017288208,0.003396988,-0.039215088,-0.023498535,-0.020507812,0.011726379],"createdAt":"2026-04-18T18:38:38.743Z","updatedAt":"2026-04-22T05:30:44.370Z","lastSeenAt":"2026-04-22T05:30:44.370Z","tsv":"'/api/endpoint-12':55,167 '/request':13,28,96 '0.02':12,27,86,95,148 '000':77 '20':76 '402 payment endpoint' '6':82 'Base network API' 'USDC pay-per-call' 'accept':63 'access':42,61 'across':98,106 'actual':217 'advertis':104 'ai':116 'analysi':120 'analyt':110 'api':5,20,40,60,153,196 'avail':193 'base':8,23,50,67,78 'broader':102 'call':4,19,150 'categori':108 'challeng':70 'classif':123 'collect':34 'commit':161 'connect':205 'consist':89 'content':211 'convers':140 'correspond':170 'cost':74 'data':109,113 'decim':83 'doc':195 'document':186 'embed':124 'endpoint':41,54,100,105,143,166,176,216 'equal':85 'estim':134 'exampl':191 'exchang':129 'export':114 'feed':128 'financ':125 'four':107 'gas':133 'generat':141 'geocod':138 'host':32 'howev':163 'http-post' 'ident':146 'indic':71 'infrastructur':136 'input/output':187 'insight':115 'json-response' 'key':154 'know':213 'land':182 'learn':118 'limit':157 'list':57,177 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':117 'maximum':73 'metric':111 'micropayment API' 'minimum':160 'name':175 'network':9,24,51 'page':183,200 'particular':165 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-request':36 'payment':46,65 'per':3,18,38,87,149 'platform':6,21,103 'practic':220 'premium':59 'price':97,127,145,197 'prompt':207 'protocol':47 'quot':132 'rate':130,156 'readm':199 'report':112 'request':39,88 'requir':162 'return':202 'schema':188 'sentiment':119 'site':92,180 'specif':53 'substant':210 'summar':122 'text':121 'token':131 'unclear':223 'uniform':94 'unit':79 'usag':190 'usdc':15,30,64,81 'usdc-base' 'util':137,221 'valid':139 'via':10,25,43 'wallet':206 'web3':126 'without':212 'x402':11,26,45,69 'x402 API' 'x402-payment'","prices":[{"id":"583a85e3-b2ec-43ae-8bdf-3206eff00e93","listingId":"a6bb77b2-f073-49d7-9e07-d3bf92c87611","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/endpoint-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:38.743Z"}],"sources":[{"listingId":"a6bb77b2-f073-49d7-9e07-d3bf92c87611","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:38.743Z","lastSeenAt":"2026-04-22T05:30:44.370Z"}],"details":{"listingId":"a6bb77b2-f073-49d7-9e07-d3bf92c87611","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-12 \\\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":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x8335…) on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/endpoint-12"},{"claim":"The site advertises uniform $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a pay-per-call API without API key registration","Agent-driven workflows that settle per-request payments in USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-as-you-go API access on Base","Low-cost per-request API consumption without subscriptions"],"notFor":["Users who need documented input/output schemas before calling an endpoint","Production workloads requiring SLA guarantees or detailed error handling documentation","Anyone needing free or non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:41.221Z"},"updatedAt":"2026-04-22T05:30:44.370Z"}}