{"id":"f2ccfb50-ad75-4656-8f12-9355ee3c2378","shortId":"GRSEB8","kind":"x402","title":"x402-gated product inventory endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated product inventory endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 80) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 given USDC's 6 decimals.\n\nThe hosting site lowpaymentfee.com advertises a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific endpoint listed here (/api/v1/products/80/inventory) is not among the APIs advertised on the landing page, and no documentation, request schema, or response schema is available for it. The docs, pricing, and README pages all resolve to a minimal \"Connect wallet\" stub with no further detail.\n\nBecause there is no OpenAPI spec, no request/response examples, and no documentation describing what \"product 80 inventory\" actually returns, the practical utility of this endpoint is unclear. The x402 challenge is live and well-formed, confirming the endpoint is operational, but callers have no way to know what payload to send or what data they will receive without experimentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","product-inventory"],"categories":["commerce","data"],"synonyms":["product inventory API","x402 API","USDC micropayment API","lowpaymentfee","pay-per-call API","Base network API","inventory lookup"],"warnings":["No documentation or OpenAPI spec available for this endpoint","No request body schema or response schema provided","The endpoint /api/v1/products/80/inventory is not listed among the provider's advertised APIs","All doc/pricing/README pages resolve to a minimal 'Connect wallet' stub with no content","Purpose and data returned by 'product 80 inventory' are unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/80/inventory","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/products/80/inventory","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no documentation, no request/response schema, no examples, and the specific endpoint is not listed on the provider's own landing page. 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":"2026-04-18T21:19:11.608Z","embedding":[-0.01828003,-0.011726379,0.010665894,0.020446777,0.005794525,-0.046203613,0.0026226044,0.024719238,0.052215576,-0.06677246,0.056640625,-0.054382324,-0.04727173,-0.04135132,-0.0075569153,0.004535675,-0.009857178,0.013641357,-0.08581543,0.016235352,0.019439697,-0.019119263,-0.023208618,0.023406982,-0.01889038,-0.011405945,-0.0014295578,0.0059814453,-0.009277344,-0.035980225,0.032592773,-0.029830933,-0.015167236,0.011291504,-0.003522873,0.01864624,0.022994995,0.042114258,0.055603027,-0.021148682,-0.018188477,-0.036224365,-0.006061554,-0.021072388,-0.03326416,0.0077209473,-0.0021972656,-0.0317688,-0.0068206787,-0.036468506,-0.004055023,-0.0025844574,-0.017974854,0.01637268,0.0060424805,0.023254395,-0.0013036728,0.012832642,0.002609253,0.033569336,0.015487671,-0.089416504,0.020721436,-0.011871338,0.00472641,0.0569458,-0.013626099,0.04626465,-0.008338928,0.06439209,-0.0018539429,0.047302246,0.007949829,0.0132751465,-0.018447876,0.007472992,-0.028030396,0.009651184,-0.021881104,-0.027633667,-0.019714355,0.007633209,-0.047607422,-0.01991272,-0.008857727,-0.06222534,-0.008323669,0.0082473755,-0.023620605,0.026428223,-0.091430664,0.0058937073,0.000010430813,0.009902954,-0.021621704,-0.03414917,0.008644104,0.0026054382,0.014152527,0.023361206,0.011260986,-0.0037021637,0.028717041,-0.00047826767,0.042144775,0.025344849,0.008354187,0.022079468,0.009864807,-0.053100586,-0.018615723,-0.019897461,-0.013473511,0.01902771,0.013000488,-0.014099121,-0.038970947,0.022705078,-0.005088806,0.050750732,-0.038604736,0.06274414,0.0048980713,-0.018539429,0.0077781677,-0.02822876,-0.038482666,-0.0038375854,-0.027496338,-0.020706177,0.053344727,-0.009887695,-0.0068511963,-0.052764893,-0.044708252,0.022659302,-0.015388489,-0.023239136,-0.05001831,0.013435364,0.028259277,-0.036743164,0.035217285,0.0038757324,-0.09454346,0.0025939941,-0.0038928986,0.0041770935,-0.030532837,0.0012693405,0.025115967,0.0034828186,-0.00116539,-0.04663086,0.008049011,-0.037109375,-0.019561768,0.05444336,0.0022621155,0.022659302,-0.0211792,0.014877319,0.046142578,0.0013017654,0.0038776398,0.043304443,-0.020431519,-0.07421875,-0.07141113,-0.015731812,-0.008468628,0.005756378,-0.012741089,-0.0062408447,-0.019836426,-0.032104492,-0.019729614,-0.0013551712,0.0013008118,-0.03652954,-0.012969971,-0.055145264,-0.0013971329,-0.048980713,-0.05206299,-0.01979065,-0.043060303,0.05267334,0.018478394,0.014022827,0.0030212402,0.014144897,0.05444336,0.031555176,0.018234253,-0.05319214,0.010391235,-0.021896362,0.07287598,-0.008293152,0.033477783,-0.025970459,0.057617188,0.059509277,-0.020874023,-0.019317627,-0.0056114197,-0.014320374,-0.02507019,-0.014877319,0.01474762,0.011940002,-0.020065308,0.031799316,-0.02128601,-0.026168823,0.01134491,0.055023193,-0.00044608116,0.08721924,-0.0007100105,0.008407593,0.008613586,0.01525116,-0.03201294,0.045654297,0.016082764,0.010345459,0.021118164,-0.06021118,0.015899658,0.025848389,-0.016540527,-0.039367676,-0.011169434,0.027694702,-0.026992798,-0.007987976,0.0041770935,-0.020904541,-0.02217102,-0.050201416,-0.010437012,-0.00027656555,0.004470825,-0.020874023,-0.04473877,-0.08203125,0.042510986,0.040130615,0.0031223297,0.0015878677,0.0006594658,-0.03010559,-0.0050468445,-0.064575195,0.018875122,0.042388916,-0.016845703,-0.013450623,0.023956299,-0.00920105,-0.028121948,-0.0020942688,-0.021713257,0.00007534027,0.0234375,0.016159058,-0.06060791,0.017990112,0.030639648,0.014862061,0.052856445,-0.026611328,-0.0546875,-0.009307861,-0.025848389,0.006286621,-0.028747559,0.0068893433,-0.03060913,0.01309967,0.01612854,0.008972168,0.027252197,0.02331543,0.001502037,0.028030396,-0.017471313,-0.0015954971,0.0063323975,0.039031982,0.007144928,-0.058044434,0.034179688,-0.012207031,0.057769775,-0.04638672,0.042175293,-0.02420044,0.029632568,0.06903076,-0.009483337,-0.05050659,-0.027923584,0.019699097,0.03970337,0.03555298,0.0056610107,0.012260437,-0.013809204,0.05038452,-0.015853882,-0.0022659302,-0.0009121895,0.026824951,0.023086548,-0.015975952,-0.046539307,-0.026000977,-0.0028457642,-0.056121826,0.031173706,-0.01826477,0.04360962,-0.031402588,-0.0022525787,-0.033111572,-0.0012960434,-0.03201294,-0.024353027,0.011657715,0.016921997,0.00004506111,-0.017929077,0.0052986145,0.044006348,-0.019943237,0.007972717,0.007030487,0.043823242,-0.011627197,-0.030136108,-0.035095215,0.009010315,-0.017242432,0.0008339882,0.03378296,0.020965576,0.008018494,-0.03201294,0.010803223,0.026229858,-0.0095825195,0.01701355,-0.010391235,-0.002790451,-0.05105591,-0.048706055,-0.018692017,-0.044708252,0.03086853,0.038726807,0.006088257,0.024917603,-0.029220581,0.020629883,-0.058929443,0.037261963,-0.04220581,0.043823242,0.043121338,-0.02053833,-0.06921387,-0.013549805,0.007850647,0.02128601,0.05709839,0.013648987,0.03945923,0.07159424,0.019714355,0.01499939,0.0135650635,0.035461426,0.023147583,-0.011543274,0.019332886,-0.04611206,-0.03189087,0.021652222,-0.03668213,-0.015182495,-0.041992188,0.013114929,0.007320404,0.07836914,-0.0072631836,0.021514893,0.029724121,0.008285522,-0.0041046143,-0.0385437,-0.018798828,-0.026992798,-0.020309448,0.02456665,0.007423401,0.022003174,-0.021026611,0.011222839,0.008239746,0.019332886,-0.028411865,0.055725098,0.009254456,-0.0007658005,0.016937256,0.023727417,0.051483154,0.0637207,-0.036834717,0.02520752,0.030700684,-0.04159546,0.008216858,0.022659302,-0.013801575,-0.029144287,-0.05795288,-0.0065574646,0.009017944,-0.013221741,-0.053588867,-0.005996704,-0.02709961,0.013648987,0.01902771,-0.0020542145,-0.025939941,0.007194519,0.009880066,-0.055358887,-0.014152527,-0.042877197,-0.001004219,0.02720642,-0.015541077,0.022399902,-0.0009899139,-0.008430481,-0.036071777,0.008857727,-0.002822876,-0.008041382,0.0072364807,0.0055618286,-0.011398315,0.018829346,0.02545166,0.016937256,0.059265137,0.019744873,0.035858154,0.025146484,0.0020160675,-0.021499634,0.02029419,-0.011581421,0.012420654,0.0010547638,-0.06317139,-0.00491333,-0.033355713,-0.045318604,0.011627197,0.007270813,-0.014099121,-0.0049476624,0.034942627,-0.013786316,-0.03439331,-0.056488037,-0.021835327,0.0022964478,0.099365234,0.00040221214,0.026473999,-0.07714844,-0.009239197,0.0132369995,0.006679535,0.010169983,-0.016860962,-0.013824463,-0.027267456,-0.022705078,-0.021377563,-0.013427734,0.045288086,0.003047943,-0.029251099,0.01940918,-0.0141067505,0.0015716553,0.01373291,0.007003784,0.009880066,-0.018585205,-0.00060272217,-0.013809204,0.042297363,-0.006877899,-0.013450623,-0.038879395,0.03869629,-0.010650635,0.036315918,-0.026916504,0.009506226,-0.013717651,0.02067566,-0.014930725,-0.01335144,-0.010856628,0.009887695,-0.04309082,-0.070251465,0.019439697,-0.021942139,0.032318115,0.020050049,-0.0007915497,0.058288574,0.000582695,0.01713562,0.008018494,-0.037475586,-0.004383087,-0.03289795,-0.014289856,-0.029220581,-0.014961243,-0.013137817,0.016830444,-0.012832642,0.03555298,-0.012397766,-0.029312134,0.04776001,0.023345947,0.028747559,0.007888794,-0.0017290115,0.019165039,0.03793335,0.006439209,-0.06402588,0.0317688,0.0009627342,0.00655365,-0.0014133453,0.016601562,0.031463623,-0.01184082,-0.017333984,-0.013053894,-0.0077705383,-0.041656494,-0.0071525574,-0.022598267,0.03326416,0.0055236816,-0.013221741,0.030410767,0.025848389,-0.008308411,-0.039916992,0.018997192,0.03881836,-0.037628174,-0.0074386597,0.014678955,0.04284668,-0.040924072,-0.0006389618,0.012283325,0.01701355,0.029464722,0.0007996559,-0.01474762,0.011871338,-0.008865356,0.0077781677,0.0085372925,-0.013084412,0.003566742,-0.0051574707,0.00844574,0.011497498,-0.0060157776,0.010482788,-0.025726318,0.015838623,-0.0054130554,-0.019577026,0.0473938,0.0262146,0.016708374,0.0045433044,0.005596161,0.031555176,-0.02229309,-0.0070152283,-0.028701782,0.032470703,-0.0058898926,0.0036392212,0.005886078,0.008926392,0.03036499,-0.052337646,0.0070266724,-0.0018978119,0.014320374,0.0031089783,-0.038757324,-0.033233643,-0.017318726,0.030197144,0.007827759,-0.0011453629,0.03375244,0.0023536682,0.00868988,0.0053100586,-0.00038528442,-0.0013666153,-0.03741455,-0.025238037,0.0014228821,0.014251709,0.0077285767,-0.031585693,0.018615723,-0.024871826,-0.023620605,0.01701355,-0.045074463,0.009674072,0.009460449,-0.017456055,0.018173218,0.016052246,0.0340271,0.0031223297,-0.041046143,-0.024169922,0.008171082,0.030578613,-0.03277588,0.010551453,0.018844604,-0.0063056946,-0.023239136,0.020446777,0.022323608,0.03363037,0.027679443,0.030807495,-0.026382446,0.024551392,-0.01939392,-0.0077171326,-0.010978699,-0.030776978,-0.024139404,-0.020965576,-0.018051147,0.027832031,0.0054855347,0.008644104,-0.005382538,-0.030029297,-0.019714355,-0.056671143,0.024932861,0.030197144,0.034332275,-0.021484375,-0.00655365,0.0047416687,0.0008530617,-0.0178833,-0.027954102,-0.026657104,0.028182983,0.0028934479,0.0050239563,-0.015335083,-0.02809143,-0.015625,0.02305603,-0.049072266,-0.045074463,0.002527237,0.017410278,-0.018707275,0.0077285767,-0.0038223267,-0.012672424,0.00655365,-0.023254395,0.012214661,-0.001627922,0.00756073,0.03390503,-0.02218628,-0.011054993,0.01777649,-0.031829834,0.040893555,-0.00018107891,0.012916565,-0.049591064,-0.0016613007,0.02999878,0.021621704,0.00037050247,-0.03704834,0.011108398,-0.029464722,-0.062347412,-0.016036987,0.0047340393,-0.00015938282,-0.019012451,0.00061893463,-0.038391113,-0.003660202,-0.03970337,0.019744873,-0.0077209473,0.03086853,0.0077171326,-0.00932312,0.004081726,0.010246277,-0.01411438,-0.04046631,0.0000035762787,0.012619019,-0.018234253,0.022918701,0.049621582,-0.019348145,0.01272583,-0.0010681152,-0.00038266182,0.019165039,-0.037902832,0.0038814545,-0.0059127808,0.016326904,-0.0047073364,-0.020019531,-0.027252197,0.0068359375,0.06011963,0.017150879,0.030548096,-0.012802124,-0.013809204,0.0034942627,0.013191223,-0.044158936,-0.0026855469,-0.032989502,0.023208618,-0.025283813,0.015571594,0.007221222,0.022323608,0.013916016,-0.014076233,-0.023040771,0.014503479,0.0357666,-0.06347656,-0.026397705,-0.058654785,0.010231018,-0.014213562,-0.03186035,-0.009681702,0.0032100677,-0.008712769,-0.078430176,0.0054893494,0.044799805,0.005432129,0.015167236,-0.0021476746,0.034606934,0.03778076,-0.009132385,-0.013961792,0.0124053955,-0.027801514,-0.023468018,-0.03366089,0.03274536,0.009094238,-0.0236969,0.0090789795,-0.012359619,0.02029419,-0.00605011,0.016738892,-0.004840851,-0.009155273,-0.017471313,-0.009262085,-0.011909485,-0.021316528,0.05783081,-0.04626465,0.016342163,0.028747559,-0.002407074,0.007446289,0.013420105,0.029251099,-0.031707764,0.012817383,0.031402588,0.017120361,0.03543091,-0.020111084,0.025115967,0.0063209534,-0.008529663,-0.00016129017,-0.03918457,-0.0028324127,-0.034332275,-0.015823364,0.020812988,-0.0011882782,0.013916016,-0.026733398,-0.0126571655,0.031585693,0.014419556,0.012374878,-0.019577026,-0.019851685,-0.04019165,0.015068054,-0.008636475,-0.011749268,-0.008102417,0.0065689087,0.038085938,0.025543213,-0.010948181,0.018630981,0.014160156,0.041656494,0.0037956238,0.011680603,0.0030651093,0.016021729,0.035461426,0.009407043,0.03111267,-0.02420044,-0.007904053,-0.013458252,-0.0021800995,0.0033016205,-0.012840271,0.022964478,0.01134491,0.009895325,0.004184723,-0.030303955,0.020889282,-0.014793396,-0.016601562,-0.0037879944,-0.011253357,0.036376953,0.01222229,-0.025756836,-0.005886078,-0.014808655,0.027359009,0.01864624,-0.008338928,-0.002729416,0.030136108,0.025772095,-0.011428833,-0.010688782,0.006893158,-0.0034809113,0.015304565,-0.009719849,0.019241333,0.03137207,-0.0040893555,0.0135269165,0.012397766,0.017562866,-0.0063972473,0.010719299,0.018356323,0.020187378,-0.019226074,0.034240723,-0.046325684,0.018844604,0.026306152,0.022537231,-0.00027251244,-0.025360107,-0.039154053,0.035736084,0.025466919,-0.007133484,0.033599854,-0.0028076172,0.039520264,-0.01687622,-0.04031372,-0.007972717,-0.011947632,-0.019256592,-0.016326904,-0.013130188,-0.0052833557,0.037597656,-0.028045654,0.025756836,-0.056884766,0.0030975342,0.0049057007,-0.0090408325,-0.0146102905,-0.032928467,-0.009918213,0.03100586,-0.031280518,-0.017868042,0.01109314,0.03829956,0.00061941147,0.012496948,0.024337769,0.022537231,0.015625,-0.042877197,-0.018203735,-0.006427765,-0.0047569275,0.024002075,-0.041625977,0.06573486,0.044677734,0.019454956,0.053009033,0.011795044,0.043792725,0.001707077,0.03665161,0.005973816,0.008094788,-0.020477295,0.011528015,0.004447937,0.04321289,-0.027954102,0.020767212,-0.002046585,0.054626465,-0.023406982,0.0013389587,0.06640625,0.025482178,0.0035800934,0.026794434,0.0137786865,-0.04119873,-0.014442444,0.0005402565,0.06591797,0.007484436,0.030776978,0.021621704,-0.009773254,-0.006072998,-0.0003361702,-0.034576416,-0.027618408,0.046081543,0.048309326,0.019378662,-0.008148193,0.0099105835,0.015853882,-0.02633667,-0.023132324,0.031921387,0.012870789,0.013023376,-0.025894165,-0.009269714,-0.012687683,0.0045280457,0.0016260147,0.0007328987,0.0009851456,0.032073975,0.014846802,0.0034599304,0.031707764,0.00497818,0.03845215,-0.034851074,0.0018415451,-0.0015563965,0.025283813,0.0023212433,-0.027404785,0.019729614,0.016677856,0.047424316,0.044158936,-0.006504059,-0.015541077,0.012580872,-0.007221222,-0.0071754456,0.03439331,0.01991272,0.007118225,0.047912598,0.029159546,0.018493652,-0.03286743,0.020095825,0.00031542778,0.017913818,-0.016616821,-0.026184082,-0.0067977905,-0.019165039,0.010482788,-0.004108429,0.01890564,0.030441284,0.035491943,0.00970459,0.0023765564,-0.004371643,0.013145447,-0.006801605,-0.015289307,0.005607605,-0.015975952,0.009399414,0.014724731,0.023498535,-0.00057792664,0.029586792,-0.0036315918,-0.040130615,-0.0022850037,-0.006088257,-0.03074646,0.012123108,0.0035591125,0.012130737,-0.035217285,0.024291992,0.005683899,0.015274048,0.010719299,0.007865906,-0.01878357,0.00034976006,0.02255249,0.02331543,-0.009963989,0.010398865,-0.005088806,0.004875183,0.03604126,-0.022659302,-0.008071899,-0.013534546,-0.01914978,0.005783081,-0.015655518,-0.014038086,0.025665283,0.028320312,-0.014793396,0.020751953,0.020965576,0.011932373,0.053985596,0.002243042,0.00415802,-0.0018434525,0.04257202,0.022460938,-0.014984131,0.0002837181,-0.004043579,-0.021835327,0.04638672,0.02507019,0.005531311,0.026107788,-0.00995636,0.0041542053,0.008506775,-0.010124207,-0.004322052,-0.026062012,-0.005428314,-0.005596161,0.031143188,-0.03213501,-0.03286743,0.0035209656,-0.02809143,-0.007499695,-0.020889282,0.006439209,0.014816284,-0.0020999908,0.033935547,0.02305603,-0.0154418945,0.05810547,-0.022491455,0.034484863,-0.022232056,0.0029354095,0.044433594,0.038970947,0.02999878,0.004005432,-0.010871887,-0.019226074,-0.0030670166,0.020645142,0.023788452,0.0051231384,-0.00945282,-0.026870728,0.028030396,-0.023727417,0.024887085,0.015068054,-0.0035552979,0.012191772,-0.02116394,-0.018463135,-0.019851685,0.0027980804,0.0005378723,0.03955078,-0.0056610107,0.024230957,-0.023391724,-0.0044937134,0.018218994,0.0026626587,0.014915466,-0.0046806335,-0.018188477,0.019256592,-0.012931824,-0.003955841,0.0038089752,0.012229919,-0.038116455,0.01966858,0.011131287,0.04269409,-0.007598877,0.04159546,0.017868042,-0.0058135986,0.0063056946,0.043518066,-0.020568848,0.028060913,-0.019500732,0.050201416,0.056396484,-0.021011353,-0.00050878525,0.0079422,-0.0026950836,-0.01638794,0.006362915,0.03125,0.0054740906,0.015701294,0.0055274963,0.013687134,0.0035552979,0.027038574,-0.002122879,0.005355835,-0.023895264,-0.008529663,0.023361206,0.011512756,0.0037670135,-0.0048179626,0.013748169,-0.0059547424,-0.0065841675,0.035583496,0.013999939,-0.03842163,0.0011329651,0.005657196,0.02583313,-0.028640747,-0.013626099,-0.0033111572,-0.039978027,-0.009803772,0.013771057,0.0077171326,0.015472412,-0.037322998,-0.0013103485,0.042510986,0.015556335,0.008422852,0.012748718,0.0021972656,0.010169983,-0.030578613,0.017852783,-0.02609253,0.001572609,0.026473999,0.018173218,0.0035972595,-0.00655365,0.0045928955,0.017333984,0.016586304,0.0184021,-0.014846802,0.040374756,-0.028015137,0.008575439,0.001914978,0.009399414,-0.03955078,-0.006286621,-0.012794495,0.04034424,0.041015625,-0.017715454,-0.010826111,0.012825012,0.038360596,0.005317688,0.021270752,0.013206482,0.06298828,0.00920105,-0.024215698,-0.026153564,0.021697998,-0.01927185,-0.025299072,0.00015079975,-0.027450562,-0.009689331,0.00083494186,0.025604248,-0.004421234,-0.005756378,-0.017425537,-0.0011692047,-0.0023345947,0.02760315,-0.003774643,-0.0087509155,-0.008544922,0.008132935,0.025650024,-0.01977539,-0.021697998,-0.018661499,-0.016647339,-0.01423645,-0.04800415,0.0027198792,-0.0008249283,0.013549805,-0.021881104,0.008781433,-0.027145386,0.0102005005,-0.00737381,-0.013092041,0.027252197,0.034454346,0.012641907,-0.0050201416,0.013122559,-0.011787415,-0.029693604,-0.017593384,-0.016815186,-0.007762909,0.022735596,-0.01953125,0.027801514,0.0256958,-0.004234314,0.0021839142,0.00548172,-0.018508911,0.0010061264,-0.0014076233,-0.026367188,0.011512756,0.016723633,-0.0039978027,-0.014404297,0.014289856,-0.013824463,-0.0047035217,0.025405884,0.04135132,0.008224487,0.010429382,0.017562866,-0.006164551,-0.036590576,-0.008293152,0.0016489029,0.0070381165,0.009063721,0.007068634,-0.010009766,0.04598999,0.007194519,-0.01121521,-0.0059928894,0.04269409,0.012550354,0.009048462,0.041168213,0.020462036,0.014274597,-0.021224976,-0.020462036,0.008934021,0.031082153,0.0045433044,0.034942627,0.0016622543,0.0011014938,-0.012168884,0.009742737,-0.0010023117,-0.026153564,-0.035705566,-0.00919342,-0.027770996,0.028076172,-0.0019626617,0.0068511963,-0.006931305,0.016662598,-0.00021445751,-0.02822876,-0.04119873,0.018173218,0.030548096,-0.01600647,-0.028305054,0.007160187,0.011306763,-0.016525269,-0.0011606216,-0.046661377,-0.018600464,-0.004234314,-0.011405945,0.008560181,0.009529114,-0.03475952,0.0032215118,-0.017242432,-0.012077332,-0.0041389465,0.02330017,-0.010406494,0.012825012,0.032165527,0.0020008087,0.014579773,0.014961243,-0.022705078,0.0040016174,0.01878357,0.001329422,0.01525116,-0.010749817,0.036834717,0.016159058,-0.014511108,0.012825012,0.013389587,0.028549194,-0.006877899,0.008514404,-0.018310547,0.0013837814,0.019104004,-0.01625061,-0.026382446,-0.0025348663,-0.013031006,-0.023086548,0.008094788,0.018356323,0.010643005,-0.026046753,0.027282715,-0.013465881,-0.03591919,0.0025959015,0.026046753,-0.012062073,-0.0022602081,0.029022217,-0.0016002655,-0.002960205,0.019836426,-0.0015573502,-0.010940552,-0.010467529,0.0019569397,-0.03591919,0.004787445,-0.002620697,0.00233078,0.066345215,0.01272583,0.031799316,0.014877319,-0.00932312,0.026062012,0.015472412,0.034362793,0.004497528,0.0058898926,0.0065307617,0.021438599,-0.002325058,0.00982666,-0.022094727,-0.015655518,-0.02607727,0.0050849915,-0.0034103394,0.0050849915,-0.011207581,0.00491333,-0.0020980835,0.02079773,-0.025909424,0.027618408,-0.018341064,-0.00005310774,0.049835205,0.020828247,0.021728516,-0.0075149536,-0.026351929,0.010681152,0.045776367,-0.03387451,-0.03894043,0.007610321,0.011428833,0.006187439,-0.0040664673,0.009384155,-0.042022705,-0.020095825,0.0009598732,-0.0011577606,-0.0054397583,0.019699097,0.02746582,0.0023212433,0.0076789856,-0.016830444,0.01838684,-0.019805908,0.0054244995,0.025299072,0.0061950684,0.008392334,0.0029678345,-0.031829834,0.016418457,0.0033493042,-0.040802002,0.048339844,-0.015701294,-0.0073547363,-0.012748718,0.019866943,-0.03692627,-0.00012814999,-0.0036735535,-0.0032997131],"createdAt":"2026-04-18T18:34:30.534Z","updatedAt":"2026-04-22T19:30:33.824Z","lastSeenAt":"2026-04-22T19:30:33.824Z","tsv":"'/api/v1/products/80/inventory':138 '0.02':87,118 '000':80 '0x8335':65 '20':79 '2913':66 '6':91 '80':42,194 'Base network API' 'USDC micropayment API' 'accept':49 'access':34 'actual':196 'advertis':97,144 'ai/ml':109 'among':141 'amount':74 'analyt':108 'api':105,123,143 'avail':158 'base':8,22,60,81 'base-network' 'behind':43 'broad':99 'call':77 'caller':221 'catalog':100 'challeng':208 'commit':131 'confirm':215 'connect':172 'contract':64 'data':107,233 'decim':92 'describ':191 'detail':178 'doc':162 'document':151,190 'endpoint':6,20,30,48,135,203,217 'equal':86 'exact':70 'exampl':187 'experiment':238 'finance/web3':111 'form':214 'gate':3,17,104 'given':88 'host':94 'howev':132 'id':41 'infer':110 'infrastructur':113 'inventori':5,19,38,195 'inventory lookup' 'json':54 'json-response' 'key':124 'know':226 'land':147 'limit':127 'list':136 'live':210 'lowpaymentfee' 'lowpaymentfee.com':32,96 'maximum':73 'minim':171 'minimum':130 'network':61 'openapi':183 'oper':219 'page':148,166 'pay':10,24 'pay-per-call API' 'pay-per-request':9,23 'payload':228 'payment':55 'paywal':46 'per':11,25,76,119 'post':50 'practic':199 'price':116,163 'product':4,18,37,40,193 'product inventory API' 'product-inventory' 'provid':33 'rate':126 'readm':165 'receiv':236 'request':12,26,51,120,152 'request/response':186 'requir':75 'resolv':168 'resourc':39 'respons':155 'return':53,197 'schema':153,156 'scheme':71 'send':230 'settl':57 'site':95 'span':106 'spec':184 'specif':134 'stub':174 'unclear':205 'unit':82 'usdc':14,28,63,84,89 'usdc-settlement' 'use':62 'util':114,200 'via':67 'wallet':173 'way':224 'well':213 'well-form':212 'without':237 'x402':2,16,45,69,103,207 'x402 API' 'x402-gated':1,15,102 'x402-payment'","prices":[{"id":"b6fffe6c-b9b0-4bf7-a733-837fa11e8737","listingId":"f2ccfb50-ad75-4656-8f12-9355ee3c2378","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/products/80/inventory","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:30.534Z"}],"sources":[{"listingId":"f2ccfb50-ad75-4656-8f12-9355ee3c2378","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/80/inventory","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:30.534Z","lastSeenAt":"2026-04-22T19:30:33.824Z"}],"details":{"listingId":"f2ccfb50-ad75-4656-8f12-9355ee3c2378","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/80/inventory \\\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 on Base network","source_url":"https://lowpaymentfee.com/api/v1/products/80/inventory"},{"claim":"The site advertises all APIs at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/products/80/inventory"}],"useCases":["Querying inventory data for product ID 80 via a single paid POST request","Demonstrating x402 payment-gated API consumption on Base","Integrating pay-per-call inventory checks into agent workflows"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that can handle x402 challenges and USDC payments","Low-volume, on-demand inventory queries without API key management"],"notFor":["Users who need documented request/response schemas before integrating","High-volume inventory systems requiring bulk or batch queries","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:22:43.885Z"},"updatedAt":"2026-04-22T19:30:33.824Z"}}