Every end-of-sale and end-of-service-life date on EOSL.ai is available as clean, source-linked JSON — no key, no login, CORS-open. Build it into your CMDB, a Slack bot, a dashboard, or an agent. Please cache and attribute EOSL.ai.
GET /api/v1/families.jsonIndex of every tracked product family — slug, vendor, series, category, status, EOSL, and detail URL.GET /api/v1/family/{slug}.jsonFull detail for one family: every SKU group with end-of-sale, EOSL, source bulletin URL, last-verified date, replacement and part numbers.GET /data/lookup.jsonCompact part-number → status map that powers the bulk checker.GET /badge/{slug}.svgLive status badge image for a family (see the badge builder)./api/v1/family/cisco-catalyst-3850.json{
"slug": "cisco-catalyst-3850",
"vendor": "Cisco",
"line": "Catalyst",
"series": "3850 Series",
"category": "Stackable access switch",
"generalAvailability": "2013-01",
"url": "https://eosl.ai/system/cisco-catalyst-3850/",
"badge": "https://eosl.ai/badge/cisco-catalyst-3850.svg",
"status": {
"key": "past",
"label": "Past end of service",
"monthsToEosl": -9
},
"skuCount": 58,
"skuGroups": [
{
"label": "Copper SKUs",
"endOfSale": "2020-10",
"endOfServiceLife": "2025-10",
"eoslComputed": false,
"active": false,
"lastFirmware": "IOS XE 16.12.x",
"sourceUrl": "https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/eos-eol-notice-c51-743072.html",
"policyUrl": null,
"lastVerified": "2026-06",
"replacement": "Cisco Catalyst 9300 Series",
"skus": [
{
"partNumber": "WS-C3850-24T-L",
"description": null,
"replacement": "C9300-24T-E"
},
{
"partNumber": "WS-C3850-24T-S",
"description": null,
"replacement": "C9300-24T-A"
},
{
"partNumber": "WS-C3850-24T-E",
"description": null,
"replacement": "C9300-24T-A"
},
{
"partNumber": "WS-C3850-48T-L",
"description": null,
"replacement": "C9300-48T-E"
},
{
"partNumber": "WS-C3850-48T-S",
"description": null,
"replacement": "C9300-48T-A"
},
{
"partNumber": "WS-C3850-48T-E",
"description": null,
"replacement": "C9300-48T-A"
},
{
"partNumber": "WS-C3850-24P-L",
"description": null,
"replacement": "C9300-24P-E"
},
{
"partNumber": "WS-C3850-24P-S",
"description": null,
"replacement": "C9300-24P-A"
},
{
"partNumber": "WS-C3850-24P-E",
"description": null,
"replacement": "C9300-24P-A"
},
{
"partNumber": "WS-C3850-48P-L",
"description": null,
"replacement": "C9300-48P-E"
},
{
"partNumber": "WS-C3850-48P-S",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "WS-C3850-48P-E",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "WS-C3850-48F-L",
"description": null,
"replacement": "C9300-48P-E"
},
{
"partNumber": "WS-C3850-48F-S",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "WS-C3850-48F-E",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "WS-C3850-24U-L",
"description": null,
"replacement": "C9300-24U-E"
},
{
"partNumber": "WS-C3850-24U-S",
"description": null,
"replacement": "C9300-24U-A"
},
{
"partNumber": "WS-C3850-24U-E",
"description": null,
"replacement": "C9300-24U-A"
},
{
"partNumber": "WS-C3850-48U-L",
"description": null,
"replacement": "C9300-48U-E"
},
{
"partNumber": "WS-C3850-48U-S",
"description": null,
"replacement": "C9300-48U-A"
},
{
"partNumber": "WS-C3850-48U-E",
"description": null,
"replacement": "C9300-48U-A"
},
{
"partNumber": "WS-C3850-12X48U-L",
"description": null,
"replacement": "C9300-48UXM-E"
},
{
"partNumber": "WS-C3850-12X48U-S",
"description": null,
"replacement": "C9300-48UXM-A"
},
{
"partNumber": "WS-C3850-12X48U-E",
"description": null,
"replacement": "C9300-48UXM-A"
},
{
"partNumber": "WS-C3850-24XU-L",
"description": null,
"replacement": "C9300-24U-E"
},
{
"partNumber": "WS-C3850-24XU-S",
"description": null,
"replacement": "C9300-24U-A"
},
{
"partNumber": "WS-C3850-24XU-E",
"description": null,
"replacement": "C9300-24U-A"
},
{
"partNumber": "C1-WS3850-24P/K9",
"description": null,
"replacement": "C9300-24P-A"
},
{
"partNumber": "C1-WS3850-24T/K9",
"description": null,
"replacement": "C9300-24T-A"
},
{
"partNumber": "C1-WS3850-24U/K9",
"description": null,
"replacement": "C9300-24U-A"
},
{
"partNumber": "C1-WS3850-48F/K9",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "C1-WS3850-48P/K9",
"description": null,
"replacement": "C9300-48P-A"
},
{
"partNumber": "C1-WS3850-48T/K9",
"description": null,
"replacement": "C9300-48T-A"
},
{
"partNumber": "C1-WS3850-48U/K9",
"description": null,
"replacement": "C9300-48U-A"
},
{
"partNumber": "C1-WSC3850-12X48UL",
"description": null,
"replacement": "C9300-48UXM-A"
},
{
"partNumber": "C1-WSC3850-24XUL",
"description": null,
"replacement": "C9300-24UX-A"
}
]
},
{
"label": "Fiber (SFP/SFP+) SKUs",
"endOfSale": "2022-04",
"endOfServiceLife": "2027-04",
"eoslComputed": false,
"active": false,
"lastFirmware": "IOS XE 16.12.x",
"sourceUrl": "https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/eos-eol-notice-c51-2438804.html",
"policyUrl": null,
"lastVerified": "2026-06",
"replacement": "Cisco Catalyst 9300/9300X and 9500",
"skus": [
{
"partNumber": "WS-C3850-12S-E",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "WS-C3850-12S-S",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "WS-C3850-12XS-E",
"description": null,
"replacement": "C9300X-12Y"
},
{
"partNumber": "WS-C3850-12XS-S",
"description": null,
"replacement": "C9300X-12Y"
},
{
"partNumber": "WS-C3850-16XS-E",
"description": null,
"replacement": "C9300X-12Y"
},
{
"partNumber": "WS-C3850-16XS-S",
"description": null,
"replacement": "C9300X-12Y"
},
{
"partNumber": "WS-C3850-24S-E",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "WS-C3850-24S-S",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "WS-C3850-24XS-E",
"description": null,
"replacement": "C9300X-24Y"
},
{
"partNumber": "WS-C3850-24XS-S",
"description": null,
"replacement": "C9300X-24Y"
},
{
"partNumber": "WS-C3850-32XS-E",
"description": null,
"replacement": "C9300X-24Y"
},
{
"partNumber": "WS-C3850-32XS-S",
"description": null,
"replacement": "C9300X-24Y"
},
{
"partNumber": "WS-C3850-48XS-E",
"description": null,
"replacement": "C9500-48Y4C"
},
{
"partNumber": "WS-C3850-48XS-F-E",
"description": null,
"replacement": "C9500-48Y4C"
},
{
"partNumber": "WS-C3850-48XS-F-S",
"description": null,
"replacement": "C9500-48Y4C"
},
{
"partNumber": "WS-C3850-48XS-S",
"description": null,
"replacement": "C9500-48Y4C"
},
{
"partNumber": "C1-WS3850-12S/K9",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "C1-WS3850-12XS-S",
"description": null,
"replacement": "C9300X-12Y"
},
{
"partNumber": "C1-WS3850-24S/K9",
"description": null,
"replacement": "C9300-24S"
},
{
"partNumber": "C1-WSC3850-24XS-S",
"description": null,
"replacement": "C9300X-24Y"
},
{
"partNumber": "C1-WSC3850-48XS-FS",
"description": null,
"replacement": "C9500-48Y4C"
},
{
"partNumber": "C1-WSC3850-48XS-S",
"description": null,
"replacement": "C9500-48Y4C"
}
]
}
]
}Every date carries the sourceUrl of the vendor bulletin it came from. Computed EOSL dates are flagged eoslComputed:true with a policyUrl.
All endpoints send Access-Control-Allow-Origin: * and are static — fetch them from the browser or a server. Please cache; the data changes at most weekly.
Family slugs match the site URLs (https://eosl.ai/system/{slug}/), so you can link users straight to the human page.
Free to use. If you surface these dates, credit EOSL.ai and link back so your users can reach the source bulletin.