{"id":"4aac3b6d-4717-4424-978f-1a1bef450be7","shortId":"wMsw6D","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 79) 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 (USDC uses 6 decimals).\n\nThe hosting site lowpaymentfee.com advertises a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, this specific endpoint (/api/v1/products/79/inventory) is labeled only as \"Premium API Access\" and does not appear in the site's publicly listed API catalog. There is no OpenAPI spec, no detailed documentation, and no example request/response available from the crawled pages. The endpoint is confirmed live: it returns a valid x402 402 challenge.\n\nBecause the endpoint's actual functionality (what inventory data it returns, what POST body it expects) is not documented anywhere in the crawled material, agents should treat this as an opaque paid endpoint. The site's docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","product-inventory","pay-per-request","json-response"],"categories":["commerce","data"],"synonyms":["product inventory API","x402 inventory endpoint","USDC pay-per-call","lowpaymentfee API","Base network API","402 payment required","product data endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The endpoint /api/v1/products/79/inventory does not appear in the site's public API catalog","All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no content","Request body format and response structure are completely unknown","Actual functionality behind 'Premium API Access' label is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/79/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/79/inventory","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation, no OpenAPI spec, no example requests or responses, and the endpoint's actual functionality is undocumented. The site's doc 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":"2026-04-18T20:01:42.345Z","embedding":[-0.017547607,-0.012176514,0.016647339,0.015411377,0.019195557,-0.038116455,-0.014137268,0.03363037,0.04977417,-0.075683594,0.06561279,-0.05407715,-0.046905518,-0.032348633,-0.0154953,0.006462097,-0.009460449,0.0085372925,-0.089660645,0.020507812,0.012680054,-0.006252289,-0.024353027,0.013641357,-0.00843811,-0.0063972473,-0.00016081333,0.005279541,-0.0004246235,-0.032165527,0.030975342,-0.027999878,-0.009765625,0.0181427,-0.004299164,0.021057129,0.0178833,0.046569824,0.054870605,-0.025909424,-0.023147583,-0.046417236,-0.00623703,-0.011192322,-0.022994995,0.0014381409,-0.0022678375,-0.039733887,-0.014808655,-0.03201294,-0.011688232,-0.008796692,-0.015174866,0.020217896,0.0048561096,0.0124053955,-0.0008177757,0.013549805,0.0013780594,0.022994995,0.014465332,-0.087646484,0.007881165,-0.00064754486,0.007282257,0.051452637,-0.024932861,0.04724121,-0.012519836,0.0519104,0.0060310364,0.04525757,0.0104599,0.014778137,-0.017440796,0.0010375977,-0.020309448,0.026367188,-0.022369385,-0.029693604,-0.018432617,0.002029419,-0.056365967,-0.02482605,-0.0019989014,-0.05831909,-0.0060539246,0.019989014,-0.030059814,0.025787354,-0.08337402,0.0072288513,-0.008117676,0.01625061,-0.027862549,-0.03173828,-0.0002887249,0.002735138,0.00466156,0.027648926,0.013809204,-0.012176514,0.028839111,0.014625549,0.053100586,0.028305054,0.014167786,0.012214661,0.005077362,-0.039001465,-0.002746582,-0.0131073,-0.01146698,0.023101807,0.017044067,-0.018127441,-0.029663086,0.027908325,-0.00819397,0.044830322,-0.03643799,0.06402588,0.009559631,-0.022521973,0.012466431,-0.028244019,-0.0340271,-0.0014228821,-0.009307861,-0.021881104,0.03805542,-0.0053367615,0.009437561,-0.051513672,-0.044677734,0.0236969,-0.0035991669,-0.0362854,-0.04925537,0.006767273,0.027526855,-0.037719727,0.028457642,0.0058174133,-0.09277344,-0.0009279251,-0.020721436,-0.00050878525,-0.029586792,-0.0074539185,0.011299133,0.010643005,-0.0063819885,-0.041900635,0.004058838,-0.03137207,-0.0024299622,0.04562378,0.0028743744,0.024917603,-0.022247314,0.015426636,0.04147339,0.0011329651,0.022155762,0.03845215,-0.025863647,-0.08721924,-0.07598877,-0.0126571655,-0.009056091,0.0124435425,-0.023269653,-0.0031585693,-0.007045746,-0.048187256,-0.022155762,-0.0031929016,0.0026073456,-0.034820557,-0.02130127,-0.05227661,-0.0030765533,-0.032684326,-0.053955078,-0.014343262,-0.04421997,0.051513672,0.01966858,0.008506775,0.012016296,0.008140564,0.053894043,0.028686523,0.00894165,-0.045684814,0.0051345825,-0.02949524,0.05895996,-0.007396698,0.033416748,-0.033477783,0.05545044,0.06976318,-0.015075684,-0.0062408447,-0.008338928,-0.022232056,-0.019485474,-0.0124435425,0.020050049,0.010719299,-0.010513306,0.043273926,-0.006767273,-0.023666382,0.011367798,0.040618896,-0.0003964901,0.08453369,-0.01991272,0.0044822693,-0.0001078248,0.009559631,-0.027832031,0.042236328,0.0259552,0.012931824,0.012107849,-0.053619385,0.011207581,0.02520752,-0.019989014,-0.025299072,-0.01083374,0.03527832,-0.028045654,-0.004470825,0.019714355,-0.022018433,-0.025375366,-0.053894043,-0.0138168335,0.006164551,0.013671875,-0.033477783,-0.039367676,-0.080322266,0.050048828,0.050476074,0.007671356,-0.004600525,0.01449585,-0.03201294,0.003929138,-0.0715332,0.017578125,0.04067993,-0.013885498,-0.009284973,0.015686035,-0.009963989,-0.02758789,-0.020645142,-0.012435913,-0.0026874542,0.016525269,0.011764526,-0.051818848,0.015396118,0.021987915,0.006290436,0.059173584,-0.025146484,-0.06854248,-0.00605011,-0.016830444,0.004272461,-0.033294678,0.00907135,-0.040222168,0.005378723,0.03262329,0.007045746,0.03656006,0.017242432,0.0104904175,0.021499634,-0.018218994,-0.0046310425,0.0002834797,0.029083252,-0.002773285,-0.074279785,0.033691406,-0.011878967,0.05609131,-0.045776367,0.03604126,-0.026000977,0.020187378,0.06842041,-0.008865356,-0.04788208,-0.023483276,0.027511597,0.038604736,0.03152466,0.0057678223,0.003452301,-0.019210815,0.0541687,-0.0096206665,-0.0082473755,0.0039520264,0.029388428,0.021331787,-0.012573242,-0.04812622,-0.031951904,0.008911133,-0.046539307,0.03387451,-0.013404846,0.029556274,-0.03994751,-0.007965088,-0.025619507,0.0021419525,-0.027740479,-0.026626587,0.006072998,0.010147095,-0.006942749,-0.0061531067,0.007129669,0.04650879,-0.026306152,0.0099105835,0.014060974,0.03994751,-0.021759033,-0.030548096,-0.02758789,0.0008006096,-0.013389587,-0.0031757355,0.039123535,0.023147583,0.016662598,-0.03479004,0.017089844,0.024642944,-0.002796173,0.020431519,-0.019958496,0.012329102,-0.052886963,-0.04269409,-0.01927185,-0.048736572,0.03869629,0.044067383,0.017211914,0.02998352,-0.028518677,0.012313843,-0.05545044,0.039733887,-0.041229248,0.038208008,0.039855957,-0.018875122,-0.061431885,-0.006664276,0.010002136,0.022125244,0.048095703,0.0129776,0.023010254,0.07684326,0.031829834,0.020370483,0.024551392,0.038330078,0.02130127,-0.013771057,0.005760193,-0.05178833,-0.02520752,0.02949524,-0.031311035,-0.017120361,-0.053833008,0.03262329,0.012374878,0.079956055,-0.0008921623,0.020263672,0.0357666,0.010559082,0.008712769,-0.024261475,-0.026321411,-0.019302368,-0.021850586,0.025344849,0.013336182,0.016983032,-0.020263672,0.01473999,0.011558533,0.025146484,-0.020080566,0.043701172,0.018569946,0.004043579,0.012298584,0.018508911,0.042114258,0.06359863,-0.046203613,0.030975342,0.029296875,-0.051757812,-0.006752014,0.021347046,-0.008117676,-0.02645874,-0.05508423,-0.013626099,0.010040283,-0.02180481,-0.052246094,-0.0037193298,-0.018493652,0.010520935,0.008560181,-0.017593384,-0.029663086,0.0039367676,0.0018177032,-0.058441162,-0.023529053,-0.037750244,-0.0041656494,0.028778076,-0.011940002,0.005836487,0.0007209778,-0.011581421,-0.025863647,0.010047913,-0.004714966,-0.016098022,0.007865906,0.0031833649,-0.010643005,0.015327454,0.028808594,0.019058228,0.04711914,0.029129028,0.046661377,0.025558472,-0.0004312992,-0.036010742,0.022598267,-0.01890564,0.012535095,-0.0039749146,-0.05645752,-0.0027313232,-0.035461426,-0.044189453,0.013198853,0.00070858,-0.015579224,-0.0030593872,0.029220581,-0.025161743,-0.029220581,-0.06286621,-0.019180298,-0.0004079342,0.093322754,0.015327454,0.015594482,-0.076049805,-0.015106201,0.024932861,0.00749588,0.011947632,-0.017654419,-0.017959595,-0.027664185,-0.02911377,-0.027801514,-0.012962341,0.042266846,0.00868988,-0.042266846,0.012969971,-0.03012085,-0.0043792725,0.010467529,0.00097322464,0.009613037,-0.014579773,0.0012750626,-0.01965332,0.04498291,-0.0076446533,-0.011604309,-0.0519104,0.03942871,-0.004962921,0.040405273,-0.034820557,0.008033752,-0.010902405,0.017440796,-0.013023376,-0.022979736,-0.017700195,0.009254456,-0.039886475,-0.08465576,0.018478394,-0.024551392,0.0362854,0.010627747,-0.0037784576,0.051239014,0.008041382,0.022384644,0.020065308,-0.02947998,-0.0047950745,-0.028381348,-0.023757935,-0.03125,-0.016494751,-0.013092041,0.015510559,-0.016525269,0.029296875,-0.018081665,-0.031463623,0.044311523,0.01701355,0.019989014,0.015213013,0.0036144257,0.019226074,0.04525757,0.0074043274,-0.059173584,0.031158447,0.0012931824,0.0031280518,-0.006378174,0.025238037,0.024734497,-0.013618469,-0.013191223,-0.0043563843,-0.008331299,-0.046569824,-0.0038070679,-0.015655518,0.043121338,0.009109497,-0.011520386,0.021957397,0.03741455,-0.009086609,-0.032592773,0.021194458,0.028915405,-0.03817749,0.010559082,0.017654419,0.04776001,-0.03555298,0.0056877136,0.00712204,0.026351929,0.02432251,0.0018072128,-0.016586304,0.0077552795,-0.008079529,0.008255005,0.009231567,-0.0067100525,0.0030403137,-0.005672455,0.010017395,0.015144348,0.011184692,-0.0062332153,-0.039764404,0.013061523,-0.008117676,-0.008575439,0.046783447,0.025909424,0.014122009,0.004776001,0.009971619,0.02507019,-0.015960693,-0.011688232,-0.025222778,0.035705566,-0.008705139,-0.0023269653,0.010467529,0.0069503784,0.04269409,-0.049621582,-0.0036811829,0.010383606,0.016738892,-0.010360718,-0.032562256,-0.037902832,-0.024398804,0.030227661,0.0070877075,-0.0005173683,0.03527832,0.008560181,0.0058403015,0.002462387,-0.00029492378,0.003545761,-0.033416748,-0.024765015,0.0023231506,0.009506226,-0.00013363361,-0.041107178,0.019973755,-0.025024414,-0.0098724365,0.009887695,-0.045684814,0.005809784,0.0026378632,-0.011764526,0.02067566,0.012992859,0.023712158,-0.005268097,-0.037750244,-0.017120361,0.008674622,0.038024902,-0.04168701,0.01689148,0.018310547,0.00086021423,-0.02015686,0.015411377,0.026855469,0.036071777,0.01701355,0.03378296,-0.025360107,0.023117065,-0.0104522705,-0.0041770935,-0.0031166077,-0.044067383,-0.0016918182,-0.022949219,-0.020263672,0.03164673,-0.0019407272,0.009056091,-0.012550354,-0.020828247,-0.013435364,-0.059570312,0.01838684,0.029388428,0.037353516,-0.023605347,-0.0010051727,0.003452301,-0.0026359558,-0.01701355,-0.020980835,-0.024917603,0.025344849,0.0047836304,-0.0008187294,-0.022720337,-0.021087646,-0.01625061,0.02053833,-0.04147339,-0.04248047,-0.012809753,0.011177063,-0.013549805,0.011100769,-0.002243042,-0.016021729,0.0096588135,-0.025466919,0.008590698,-0.00067424774,0.002784729,0.03338623,-0.021011353,0.000037312508,0.017944336,-0.017700195,0.036102295,0.0058135986,0.009849548,-0.051574707,0.005508423,0.029251099,0.025436401,-0.00035500526,-0.037872314,0.009033203,-0.034088135,-0.061431885,-0.014022827,0.008171082,-0.0076141357,-0.0109939575,-0.0023231506,-0.036010742,-0.008079529,-0.040863037,0.017059326,0.0025177002,0.031982422,0.010749817,-0.005130768,0.00548172,0.00737381,-0.010444641,-0.04208374,-0.0007004738,0.012954712,-0.014595032,0.0234375,0.05355835,-0.015930176,0.0070266724,-0.0054855347,-0.00945282,0.026565552,-0.02696228,0.0036201477,-0.0036315918,0.020492554,-0.005970001,-0.02772522,-0.03189087,0.009529114,0.06188965,0.016036987,0.019332886,-0.015129089,-0.009895325,0.0079574585,0.023376465,-0.04559326,-0.002243042,-0.03164673,0.031280518,-0.024475098,0.026275635,0.008811951,0.023605347,0.007423401,-0.020477295,-0.0079193115,0.020751953,0.022521973,-0.068359375,-0.020095825,-0.051483154,0.0038928986,-0.0104904175,-0.0345459,-0.0037517548,0.004257202,-0.010818481,-0.081970215,0.007881165,0.048919678,-0.0005354881,0.027191162,-0.014923096,0.03363037,0.036193848,-0.00573349,-0.016647339,0.01776123,-0.026626587,-0.023880005,-0.036956787,0.029846191,0.0070495605,-0.023742676,0.014930725,-0.008163452,0.014625549,0.004070282,0.015289307,-0.00623703,-0.0009598732,-0.011558533,0.0046195984,-0.015853882,-0.011001587,0.046936035,-0.043518066,0.017654419,0.021102905,-0.0030384064,0.0058670044,0.021209717,0.026824951,-0.044677734,0.013183594,0.043060303,0.023010254,0.039520264,-0.019470215,0.032470703,0.010276794,-0.01574707,0.018005371,-0.0362854,-0.01651001,-0.039123535,-0.017059326,0.017486572,-0.012527466,0.025390625,-0.037109375,-0.0064430237,0.030822754,0.009498596,0.007820129,-0.020874023,-0.022827148,-0.04220581,0.019439697,-0.0118255615,-0.015991211,0.00076913834,0.011802673,0.027267456,0.038513184,-0.006877899,0.008369446,0.014793396,0.03366089,-0.004470825,0.012229919,0.0012989044,0.012809753,0.03616333,0.012840271,0.03567505,-0.030883789,-0.0047683716,-0.010269165,-0.0059661865,-0.002407074,-0.0035705566,0.010658264,0.015029907,0.007381439,0.00010281801,-0.029693604,0.015579224,-0.02911377,-0.026153564,0.00048732758,-0.004219055,0.029129028,0.019470215,-0.019256592,-0.0075302124,-0.0054969788,0.031799316,0.01802063,-0.007736206,0.0028915405,0.034698486,0.019927979,-0.010345459,-0.01399231,0.0069351196,-0.0037269592,0.015396118,-0.010749817,0.011116028,0.031433105,-0.00013446808,0.012001038,0.002166748,0.016738892,-0.0016756058,0.010406494,0.012878418,0.0079422,-0.02192688,0.032165527,-0.037384033,0.004196167,0.02432251,0.021331787,-0.0006055832,-0.029785156,-0.05355835,0.037139893,0.019485474,-0.003610611,0.042388916,-0.01109314,0.04333496,-0.020233154,-0.033569336,-0.0042915344,-0.010017395,-0.015113831,-0.0023441315,-0.010314941,-0.01348114,0.03213501,-0.030593872,0.021865845,-0.060180664,0.0095825195,0.002357483,-0.01473999,-0.014808655,-0.031143188,-0.012123108,0.03213501,-0.032104492,-0.0058555603,-0.0002206564,0.036987305,0.012260437,0.013534546,0.0340271,0.02520752,0.02381897,-0.05218506,-0.017333984,-0.009056091,-0.017211914,0.028060913,-0.041107178,0.05029297,0.047821045,0.014328003,0.035888672,0.021362305,0.041168213,0.005531311,0.03515625,-0.0013656616,0.0015211105,-0.020843506,0.012420654,0.001789093,0.048797607,-0.020553589,0.01713562,0.0013065338,0.052612305,-0.021255493,0.0056037903,0.06732178,0.025390625,0.00466156,0.03817749,0.011161804,-0.03289795,-0.015777588,-0.004032135,0.058654785,0.003824234,0.035186768,0.019104004,0.0025806427,-0.005722046,0.012245178,-0.029754639,-0.043426514,0.052642822,0.04510498,0.014465332,-0.008422852,0.0006570816,0.008323669,-0.025772095,-0.019882202,0.028762817,0.01939392,0.0076065063,-0.02078247,-0.008796692,-0.007637024,0.013900757,0.0104904175,0.001121521,-0.00022780895,0.036193848,0.027297974,0.01033783,0.03616333,0.005744934,0.03994751,-0.031082153,-0.00023639202,0.0009784698,0.025100708,-0.00037550926,-0.016113281,0.019134521,0.010192871,0.04751587,0.04940796,-0.00087308884,-0.017562866,0.015426636,-0.009056091,-0.011260986,0.0362854,0.025253296,0.008857727,0.045654297,0.03567505,0.017166138,-0.033050537,0.007648468,-0.008255005,0.022247314,-0.012672424,-0.02949524,-0.0064888,-0.02204895,0.010620117,-0.0018177032,0.009223938,0.032562256,0.04269409,0.009986877,0.009880066,-0.0016098022,0.00868988,-0.0030345917,-0.019378662,0.011238098,-0.016448975,0.002796173,0.015327454,0.02557373,-0.0072898865,0.03125,-0.004207611,-0.039855957,-0.0070266724,-0.009506226,-0.030593872,0.015609741,-0.0029411316,0.014846802,-0.032165527,0.019042969,0.017654419,0.01727295,0.02142334,0.005554199,-0.014297485,0.002029419,0.02319336,0.022323608,-0.011817932,-0.0019779205,-0.0034389496,0.011398315,0.03881836,-0.009178162,0.0015659332,-0.0034179688,-0.017211914,0.0065841675,-0.017044067,-0.0058174133,0.018310547,0.022659302,-0.0137786865,0.012428284,0.030456543,0.012756348,0.05041504,0.0014867783,0.0038852692,-0.0019340515,0.03857422,0.015991211,-0.01737976,0.0014600754,0.0046310425,-0.015960693,0.04220581,0.023727417,0.0027179718,0.02935791,-0.010940552,0.0043640137,0.011550903,-0.01399231,0.0063476562,-0.024520874,-0.007019043,-0.0066719055,0.024246216,-0.03289795,-0.032958984,0.003572464,-0.029586792,-0.005554199,-0.018692017,0.008514404,0.0069084167,-0.00015509129,0.042053223,0.021850586,-0.018554688,0.06530762,-0.017730713,0.028808594,-0.026107788,-0.0021076202,0.048187256,0.038146973,0.034240723,0.008163452,-0.010345459,-0.013793945,-0.003522873,0.025283813,0.028366089,0.013595581,-0.0099487305,-0.022033691,0.022918701,-0.023345947,0.026138306,0.0138549805,0.0012378693,0.008956909,-0.01474762,-0.0037193298,-0.017028809,0.009819031,0.0016860962,0.041046143,-0.012008667,0.027801514,-0.024810791,-0.004131317,0.029663086,-0.002029419,0.012649536,0.0001975298,-0.021911621,0.018920898,-0.008628845,-0.00082302094,0.00579834,0.012207031,-0.046325684,0.012359619,0.015274048,0.029388428,-0.017791748,0.039794922,0.009719849,-0.002779007,0.011054993,0.044921875,-0.018844604,0.03338623,-0.011070251,0.04119873,0.04852295,-0.024551392,-0.010864258,0.005683899,0.0014095306,-0.013244629,0.007850647,0.029296875,-0.000854969,0.021209717,0.0008049011,0.008163452,-0.0015869141,0.025787354,-0.0041160583,0.004333496,-0.022735596,-0.008338928,0.022399902,0.010002136,0.0069847107,-0.006038666,0.019805908,-0.010482788,-0.001742363,0.038269043,0.0158844,-0.04147339,0.0048332214,0.0027599335,0.023498535,-0.027999878,-0.022705078,-0.0067367554,-0.04107666,0.00166893,0.013465881,0.0066184998,0.015144348,-0.03933716,0.0034160614,0.03640747,0.012229919,0.0047035217,0.008132935,-0.0038814545,0.012161255,-0.030319214,0.018066406,-0.026657104,0.013175964,0.028884888,0.007965088,-0.0029239655,-0.011505127,0.012001038,0.0158844,0.010131836,0.010307312,-0.011398315,0.040405273,-0.02305603,-0.00052022934,-0.0060806274,0.012321472,-0.029388428,-0.0034313202,-0.015655518,0.035736084,0.04232788,-0.022750854,-0.007194519,0.0146102905,0.032409668,0.0022296906,0.030349731,0.014823914,0.05419922,0.02015686,-0.03378296,-0.024642944,0.030456543,-0.021408081,-0.031280518,0.0029640198,-0.020568848,-0.009628296,0.0058174133,0.021743774,-0.0070762634,-0.011123657,-0.017410278,-0.0025920868,-0.0043678284,0.028152466,-0.015144348,-0.0050086975,-0.013320923,-0.001991272,0.027328491,-0.022262573,-0.022445679,-0.01828003,-0.013061523,-0.015487671,-0.04699707,-0.004081726,-0.007911682,0.0069389343,-0.023208618,0.0063323975,-0.021194458,0.021087646,-0.005268097,-0.011238098,0.02331543,0.032928467,0.013648987,0.0059051514,0.013183594,-0.011222839,-0.029388428,-0.017913818,-0.015045166,-0.011474609,0.020843506,-0.017181396,0.029815674,0.028198242,-0.00025892258,0.00579834,-0.004169464,-0.0152282715,-0.0043182373,-0.018585205,-0.02696228,0.017150879,0.016433716,-0.00034451485,-0.0154418945,0.030792236,-0.013847351,-0.016784668,0.020385742,0.04550171,0.014945984,0.018325806,0.012107849,-0.0026168823,-0.029129028,-0.007472992,0.0038394928,0.00039315224,0.010261536,0.00831604,-0.0043792725,0.027252197,0.009475708,-0.019470215,0.001540184,0.04724121,0.014053345,-0.007282257,0.049713135,0.014511108,0.005695343,-0.019744873,-0.021987915,0.00995636,0.03463745,0.003917694,0.029388428,0.0057792664,-0.005622864,-0.0077552795,0.019851685,0.006290436,-0.024993896,-0.031921387,-0.013542175,-0.018875122,0.027359009,0.00085258484,0.008094788,-0.009628296,0.013290405,-0.0012149811,-0.029754639,-0.03765869,0.022079468,0.020126343,-0.013786316,-0.0231781,0.0031719208,0.009559631,-0.016464233,-0.0012130737,-0.04449463,-0.009422302,-0.013496399,-0.012451172,0.001964569,0.009483337,-0.022766113,-0.003156662,-0.010505676,-0.009811401,-0.013069153,0.020080566,-0.018859863,0.014419556,0.03564453,-0.005886078,0.0051956177,0.017501831,-0.021224976,-0.0031013489,0.021392822,-0.0008430481,0.010261536,-0.010917664,0.039093018,0.016098022,-0.016998291,0.015609741,0.005870819,0.02822876,-0.0013895035,0.0050811768,-0.022735596,0.0027713776,0.031311035,-0.011512756,-0.035705566,0.004749298,-0.007041931,-0.022949219,0.004360199,0.016967773,0.016067505,-0.026306152,0.02128601,-0.011451721,-0.035461426,0.0021381378,0.030090332,-0.00969696,0.00042033195,0.03265381,0.001405716,-0.004245758,0.023864746,0.0018634796,-0.016448975,-0.011405945,-0.00046539307,-0.031082153,-0.0037193298,0.011138916,0.0034294128,0.06695557,0.014694214,0.024963379,0.022415161,-0.0045661926,0.033477783,0.012107849,0.025924683,0.0038433075,-0.0022258759,0.008232117,0.016311646,-0.010696411,0.003194809,-0.016799927,-0.007522583,-0.027130127,0.0039749146,0.0024337769,0.0023078918,-0.016815186,0.0023593903,-0.0016555786,0.008430481,-0.024856567,0.02468872,-0.024780273,0.0045280457,0.045562744,0.02708435,0.012046814,-0.0015869141,-0.020263672,0.013206482,0.047821045,-0.033355713,-0.033081055,-0.003288269,0.005176544,0.011703491,-0.01084137,0.014175415,-0.033996582,-0.013633728,0.0021247864,-0.00082063675,-0.008712769,0.014930725,0.028717041,0.005580902,0.008415222,-0.009918213,0.027633667,-0.017990112,0.0030822754,0.015655518,0.0053710938,0.010887146,0.0070495605,-0.030853271,0.01361084,0.013633728,-0.037261963,0.052093506,-0.016601562,-0.004722595,-0.00819397,0.022781372,-0.043121338,-0.0006260872,-0.0020885468,-0.004962921],"createdAt":"2026-04-18T18:32:26.766Z","updatedAt":"2026-04-22T21:30:18.313Z","lastSeenAt":"2026-04-22T21:30:18.313Z","tsv":"'/api/v1/products/79/inventory':135 '0.02':87,118 '000':80 '0x8335':65 '20':79 '2913':66 '402':182 '402 payment required' '6':90 '79':42 'Base network API' 'USDC pay-per-call' 'accept':49 'access':34,142 'actual':188 'advertis':96 'agent':208 'ai/ml':108 'amount':74 'analyt':107 'anywher':203 'api':104,123,141,153,222 'appear':146 'avail':167 'base':8,22,60,81 'base-network' 'behind':43 'bodi':197 'broad':98 'call':77 'catalog':99,154 'challeng':183 'commit':130 'confirm':175 'connect':230 'content':236 'contract':64 'crawl':170,206 'data':106,111,192 'decim':91 'detail':161 'doc':220 'document':162,202 'endpoint':6,20,30,48,134,173,186,216 'equal':86 'exact':70 'exampl':165 'expect':199 'finance/web3':110 'function':189 'gate':3,17,103 'host':93 'howev':131 'id':41 'infer':109 'infrastructur':113 'inventori':5,19,38,191 'json':54 'json-response' 'key':124 'label':137 'limit':127 'list':152 'live':176 'lowpaymentfee API' 'lowpaymentfee.com':32,95 'materi':207 'maximum':73 'network':61 'opaqu':214 'openapi':158 'page':171,225 'paid':215 'pay':10,24 'pay-per-request':9,23 'payment':55 'paywal':46 'per':11,25,76,119 'post':50,196 'premium':140 'price':116,221 'product':4,18,37,40 'product data endpoint' 'product inventory API' 'product-inventory' 'prompt':232 'provid':33 'public':151 'rate':126 'readm':224 'render':227 'request':12,26,51,120 'request/response':166 'requir':75 'resourc':39 'return':53,178,194 'scheme':71 'settl':57 'site':94,149,218 'span':105 'spec':159 'specif':133 'substant':235 'treat':210 'unit':82 'usdc':14,28,63,84,88 'usdc-settlement' 'use':62,89 'util':114 'valid':180 'via':67 'wallet':231 'x402':2,16,45,69,102,181 'x402 inventory endpoint' 'x402-gated':1,15,101 'x402-payment'","prices":[{"id":"b08dcb9a-6777-4c63-9ac8-359293ffc12c","listingId":"4aac3b6d-4717-4424-978f-1a1bef450be7","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/79/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":"2026-04-18T18:32:26.766Z"}],"sources":[{"listingId":"4aac3b6d-4717-4424-978f-1a1bef450be7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/79/inventory","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:26.766Z","lastSeenAt":"2026-04-22T21:30:18.313Z"}],"details":{"listingId":"4aac3b6d-4717-4424-978f-1a1bef450be7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/79/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 endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/products/79/inventory"},{"claim":"The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/products/79/inventory"}],"useCases":["Querying inventory status for product ID 79 via a micropayment-gated API","Integrating pay-per-request product data into an agent workflow without API keys","Demonstrating x402 protocol payment flows on Base with USDC"],"bestFor":["Agents that can handle x402 payment challenges on Base","Use cases requiring keyless, pay-as-you-go API access","Developers experimenting with x402 protocol integrations"],"notFor":["Users who need detailed API documentation or schemas before calling","High-volume inventory queries where per-request pricing adds up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:21:28.466Z"},"updatedAt":"2026-04-22T21:30:18.313Z"}}