diff --git a/.changeset/shiny-points-melt.md b/.changeset/shiny-points-melt.md
new file mode 100644
index 0000000000..f1ddd2124b
--- /dev/null
+++ b/.changeset/shiny-points-melt.md
@@ -0,0 +1,5 @@
+---
+'@chainlink/nav-libre-adapter': major
+---
+
+Adds NAV adapter for LibreCapital
diff --git a/.pnp.cjs b/.pnp.cjs
index 22bc5752c6..4d9c76f507 100644
--- a/.pnp.cjs
+++ b/.pnp.cjs
@@ -714,6 +714,10 @@ const RAW_RUNTIME_STATE =
       "name": "@chainlink/nav-generic-adapter",\
       "reference": "workspace:packages/sources/nav-generic"\
     },\
+    {\
+      "name": "@chainlink/nav-libre-adapter",\
+      "reference": "workspace:packages/sources/nav-libre"\
+    },\
     {\
       "name": "@chainlink/ncfx-adapter",\
       "reference": "workspace:packages/sources/ncfx"\
@@ -1131,6 +1135,7 @@ const RAW_RUNTIME_STATE =
     ["@chainlink/mycryptoapi-adapter", ["workspace:packages/sources/mycryptoapi"]],\
     ["@chainlink/nav-consulting-adapter", ["workspace:packages/sources/nav-consulting"]],\
     ["@chainlink/nav-generic-adapter", ["workspace:packages/sources/nav-generic"]],\
+    ["@chainlink/nav-libre-adapter", ["workspace:packages/sources/nav-libre"]],\
     ["@chainlink/ncfx-adapter", ["workspace:packages/sources/ncfx"]],\
     ["@chainlink/nexus-kiln-adapter", ["workspace:packages/composites/nexus-kiln"]],\
     ["@chainlink/nft-blue-chip-adapter", ["workspace:packages/sources/nft-blue-chip"]],\
@@ -8060,6 +8065,25 @@ const RAW_RUNTIME_STATE =
         "linkType": "SOFT"\
       }]\
     ]],\
+    ["@chainlink/nav-libre-adapter", [\
+      ["workspace:packages/sources/nav-libre", {\
+        "packageLocation": "./packages/sources/nav-libre/",\
+        "packageDependencies": [\
+          ["@chainlink/nav-libre-adapter", "workspace:packages/sources/nav-libre"],\
+          ["@chainlink/external-adapter-framework", "npm:2.6.0"],\
+          ["@types/crypto-js", "npm:4.2.2"],\
+          ["@types/jest", "npm:29.5.14"],\
+          ["@types/node", "npm:22.14.1"],\
+          ["crypto-js", "npm:4.2.0"],\
+          ["date-fns", "npm:4.1.0"],\
+          ["nock", "npm:13.5.6"],\
+          ["tslib", "npm:2.4.1"],\
+          ["typescript", "patch:typescript@npm%3A5.8.3#optional!builtin<compat/typescript>::version=5.8.3&hash=5786d5"],\
+          ["uuid", "npm:11.1.0"]\
+        ],\
+        "linkType": "SOFT"\
+      }]\
+    ]],\
     ["@chainlink/ncfx-adapter", [\
       ["workspace:packages/sources/ncfx", {\
         "packageLocation": "./packages/sources/ncfx/",\
@@ -38378,6 +38402,13 @@ const RAW_RUNTIME_STATE =
       }]\
     ]],\
     ["uuid", [\
+      ["npm:11.1.0", {\
+        "packageLocation": "./.yarn/cache/uuid-npm-11.1.0-61d0d08928-d2da43b49b.zip/node_modules/uuid/",\
+        "packageDependencies": [\
+          ["uuid", "npm:11.1.0"]\
+        ],\
+        "linkType": "HARD"\
+      }],\
       ["npm:2.0.1", {\
         "packageLocation": "./.yarn/unplugged/uuid-npm-2.0.1-a78a0c30dd/node_modules/uuid/",\
         "packageDependencies": [\
diff --git a/.yarn/cache/uuid-npm-11.1.0-61d0d08928-d2da43b49b.zip b/.yarn/cache/uuid-npm-11.1.0-61d0d08928-d2da43b49b.zip
new file mode 100644
index 0000000000..6acc3b0429
Binary files /dev/null and b/.yarn/cache/uuid-npm-11.1.0-61d0d08928-d2da43b49b.zip differ
diff --git a/packages/sources/nav-libre/CHANGELOG.md b/packages/sources/nav-libre/CHANGELOG.md
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/sources/nav-libre/README.md b/packages/sources/nav-libre/README.md
new file mode 100644
index 0000000000..263497465a
--- /dev/null
+++ b/packages/sources/nav-libre/README.md
@@ -0,0 +1,3 @@
+# Chainlink External Adapter for nav-libre
+
+This README will be generated automatically when code is merged to `main`. If you would like to generate a preview of the README, please run `yarn generate:readme nav-libre`.
diff --git a/packages/sources/nav-libre/package.json b/packages/sources/nav-libre/package.json
new file mode 100644
index 0000000000..4a373e56ac
--- /dev/null
+++ b/packages/sources/nav-libre/package.json
@@ -0,0 +1,44 @@
+{
+  "name": "@chainlink/nav-libre-adapter",
+  "version": "0.0.0",
+  "description": "Chainlink nav-libre adapter.",
+  "keywords": [
+    "Chainlink",
+    "LINK",
+    "blockchain",
+    "oracle",
+    "nav-libre"
+  ],
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "repository": {
+    "url": "https://github.com/smartcontractkit/external-adapters-js",
+    "type": "git"
+  },
+  "license": "MIT",
+  "scripts": {
+    "clean": "rm -rf dist && rm -f tsconfig.tsbuildinfo",
+    "prepack": "yarn build",
+    "build": "tsc -b",
+    "server": "node -e 'require(\"./index.js\").server()'",
+    "server:dist": "node -e 'require(\"./dist/index.js\").server()'",
+    "start": "yarn server:dist"
+  },
+  "devDependencies": {
+    "@types/crypto-js": "^4",
+    "@types/jest": "^29.5.14",
+    "@types/node": "22.14.1",
+    "nock": "13.5.6",
+    "typescript": "5.8.3"
+  },
+  "dependencies": {
+    "@chainlink/external-adapter-framework": "2.6.0",
+    "crypto-js": "^4.2.0",
+    "date-fns": "^4.1.0",
+    "tslib": "2.4.1",
+    "uuid": "^11.1.0"
+  }
+}
diff --git a/packages/sources/nav-libre/src/config/index.ts b/packages/sources/nav-libre/src/config/index.ts
new file mode 100644
index 0000000000..c96cd9bdcd
--- /dev/null
+++ b/packages/sources/nav-libre/src/config/index.ts
@@ -0,0 +1,35 @@
+import { AdapterConfig } from '@chainlink/external-adapter-framework/config'
+
+export const config = new AdapterConfig(
+  {
+    API_KEY: {
+      description: 'An API key for Data Provider',
+      type: 'string',
+      required: true,
+      sensitive: true,
+    },
+    SECRET_KEY: {
+      description: 'A key for Data Provider used in hashing the API key',
+      type: 'string',
+      required: true,
+      sensitive: true,
+    },
+    API_ENDPOINT: {
+      description: 'An API endpoint for Data Provider',
+      type: 'string',
+      default: 'https://api.navfundservices.com',
+    },
+    BACKGROUND_EXECUTE_MS: {
+      description:
+        'The amount of time the background execute should sleep before performing the next request',
+      type: 'number',
+      default: 120_000, // one call per two minute
+    },
+  },
+  {
+    envDefaultOverrides: {
+      CACHE_MAX_AGE: 900_000, // 15 minute cache
+      RETRY: 0, // Disables retry on Framework
+    },
+  },
+)
diff --git a/packages/sources/nav-libre/src/endpoint/index.ts b/packages/sources/nav-libre/src/endpoint/index.ts
new file mode 100644
index 0000000000..0b91aa2c62
--- /dev/null
+++ b/packages/sources/nav-libre/src/endpoint/index.ts
@@ -0,0 +1 @@
+export { endpoint as nav } from './nav'
diff --git a/packages/sources/nav-libre/src/endpoint/nav.ts b/packages/sources/nav-libre/src/endpoint/nav.ts
new file mode 100644
index 0000000000..5d0b519f9f
--- /dev/null
+++ b/packages/sources/nav-libre/src/endpoint/nav.ts
@@ -0,0 +1,37 @@
+import { AdapterEndpoint } from '@chainlink/external-adapter-framework/adapter'
+import { InputParameters } from '@chainlink/external-adapter-framework/validation'
+import { config } from '../config'
+import { navLibreTransport } from '../transport/nav'
+
+export const inputParameters = new InputParameters(
+  {
+    globalFundID: {
+      required: true,
+      type: 'number',
+      description: 'The global fund ID for the Libre fund',
+    },
+  },
+  [
+    {
+      globalFundID: 1234,
+    },
+  ],
+)
+export type BaseEndpointTypes = {
+  Parameters: typeof inputParameters.definition
+  Response: {
+    Result: number
+    Data: {
+      navPerShare: number
+      navDate: string
+      globalFundID: number
+    }
+  }
+  Settings: typeof config.settings
+}
+
+export const endpoint = new AdapterEndpoint({
+  name: 'nav',
+  transport: navLibreTransport,
+  inputParameters,
+})
diff --git a/packages/sources/nav-libre/src/index.ts b/packages/sources/nav-libre/src/index.ts
new file mode 100644
index 0000000000..57f2671d83
--- /dev/null
+++ b/packages/sources/nav-libre/src/index.ts
@@ -0,0 +1,13 @@
+import { expose, ServerInstance } from '@chainlink/external-adapter-framework'
+import { Adapter } from '@chainlink/external-adapter-framework/adapter'
+import { config } from './config'
+import { nav } from './endpoint'
+
+export const adapter = new Adapter({
+  defaultEndpoint: nav.name,
+  name: 'NAV_LIBRE',
+  config,
+  endpoints: [nav],
+})
+
+export const server = (): Promise<ServerInstance | undefined> => expose(adapter)
diff --git a/packages/sources/nav-libre/src/transport/authentication.ts b/packages/sources/nav-libre/src/transport/authentication.ts
new file mode 100644
index 0000000000..ee9c1f5f93
--- /dev/null
+++ b/packages/sources/nav-libre/src/transport/authentication.ts
@@ -0,0 +1,33 @@
+import CryptoJS from 'crypto-js'
+import { v4 as uuidv4 } from 'uuid'
+
+/**
+ * Generate the necessary headers for calling the NAV API with a 5-minute-valid signature.
+ */
+export const getRequestHeaders = ({
+  method,
+  path,
+  body,
+  apiKey,
+  secret,
+}: {
+  method: string
+  path: string
+  body: string
+  apiKey: string
+  secret: string
+}) => {
+  const utcNow = new Date().toUTCString()
+  const nonce = uuidv4()
+  const contentHash = CryptoJS.SHA256(body).toString(CryptoJS.enc.Base64)
+  const stringToSign = [apiKey, path, method, utcNow, nonce, contentHash].join(';')
+
+  // Compute the HMAC-SHA256 signature, Base64-encoded
+  const signature = CryptoJS.HmacSHA256(stringToSign, secret).toString(CryptoJS.enc.Base64)
+
+  return {
+    'x-date': utcNow,
+    'x-content-sha256': contentHash,
+    'x-hmac256-signature': `${apiKey};${nonce};${signature}`,
+  }
+}
diff --git a/packages/sources/nav-libre/src/transport/date-utils.ts b/packages/sources/nav-libre/src/transport/date-utils.ts
new file mode 100644
index 0000000000..74c1b046f7
--- /dev/null
+++ b/packages/sources/nav-libre/src/transport/date-utils.ts
@@ -0,0 +1,44 @@
+import { differenceInBusinessDays, format, isValid, parse, subBusinessDays } from 'date-fns'
+
+// Date format used by the NavLibre API
+export const DATE_FORMAT = 'MM-dd-yyyy'
+export const MAX_BUSINESS_DAYS = 7
+
+/**
+ * Parse a string in MM-DD-YYYY format.
+ * Throws if the string is missing or malformed.
+ */
+export function parseDateString(dateStr: string): Date {
+  const parsed = parse(dateStr, DATE_FORMAT, new Date())
+  if (!isValid(parsed)) {
+    throw new Error(`date must be in ${DATE_FORMAT} format: got "${dateStr}"`)
+  }
+  return new Date(Date.UTC(parsed.getFullYear(), parsed.getMonth(), parsed.getDate()))
+}
+
+/**
+ * Guarantee the (from -> to) span is <= `maxBusinessDays`.
+ *
+ * If the gap is larger, shift `from` forward so it sits exactly
+ * `maxBusinessDays` business days before `to` and returns the new `from`.
+ *
+ * Returns the original `from` if the gap is smaller or equal.
+ *
+ * Example: 7-day limit
+ *   from = 2025-06-25   (Wed)
+ *   to   = 2025-07-10   (Thu)
+ *   span = 11 business days  ->  newFrom = 2025-07-01
+ */
+export function clampStartByBusinessDays(
+  from: Date,
+  to: Date,
+  maxBusinessDays = MAX_BUSINESS_DAYS,
+): Date {
+  const span = differenceInBusinessDays(to, from)
+  return span > maxBusinessDays ? subBusinessDays(to, maxBusinessDays) : from
+}
+
+/** Convenience formatter so every outbound string is consistent. */
+export function toDateString(d: Date): string {
+  return format(d, DATE_FORMAT)
+}
diff --git a/packages/sources/nav-libre/src/transport/fund-dates.ts b/packages/sources/nav-libre/src/transport/fund-dates.ts
new file mode 100644
index 0000000000..fdb1b12963
--- /dev/null
+++ b/packages/sources/nav-libre/src/transport/fund-dates.ts
@@ -0,0 +1,51 @@
+import { Requester } from '@chainlink/external-adapter-framework/util/requester'
+import { AdapterError } from '@chainlink/external-adapter-framework/validation/error'
+import { getRequestHeaders } from './authentication'
+
+export interface FundDatesResponse {
+  LogID: number
+  FromDate: string
+  ToDate: string
+}
+
+export const getFundDates = async ({
+  globalFundID,
+  baseURL,
+  apiKey,
+  secret,
+  requester,
+}: {
+  globalFundID: number
+  baseURL: string
+  apiKey: string
+  secret: string
+  requester: Requester
+}): Promise<FundDatesResponse> => {
+  const method = 'GET'
+  const url = `/navapigateway/api/v1/ClientMasterData/GetAccountingDataDates?globalFundID=${globalFundID}`
+  const requestConfig = {
+    baseURL: baseURL,
+    url: url,
+    method: method,
+    headers: getRequestHeaders({
+      method: method,
+      path: url,
+      body: '',
+      apiKey: apiKey,
+      secret: secret,
+    }),
+  }
+
+  const sourceResponse = await requester.request<FundDatesResponse>(
+    JSON.stringify(requestConfig),
+    requestConfig,
+  )
+  if (!sourceResponse.response.data) {
+    throw new AdapterError({
+      statusCode: 400,
+      message: `No fund found`,
+    })
+  }
+
+  return sourceResponse.response.data
+}
diff --git a/packages/sources/nav-libre/src/transport/fund.ts b/packages/sources/nav-libre/src/transport/fund.ts
new file mode 100644
index 0000000000..00e98e65b5
--- /dev/null
+++ b/packages/sources/nav-libre/src/transport/fund.ts
@@ -0,0 +1,78 @@
+import { Requester } from '@chainlink/external-adapter-framework/util/requester'
+import { AdapterError } from '@chainlink/external-adapter-framework/validation/error'
+import { getRequestHeaders } from './authentication'
+
+interface FundResponse {
+  Data: {
+    'Trading Level Net ROR': {
+      DTD: number
+      MTD: number
+      QTD: number
+      YTD: number
+      ITD: number
+    }
+    'Net ROR': {
+      DTD: number
+      MTD: number
+      QTD: number
+      YTD: number
+      ITD: number
+    }
+    'NAV Per Share': number
+    'Next NAV Price': number
+    'Accounting Date': string
+    'Ending Balance': number
+  }[]
+}
+
+export const getFund = async ({
+  globalFundID,
+  fromDate,
+  toDate,
+  baseURL,
+  apiKey,
+  secret,
+  requester,
+}: {
+  globalFundID: number
+  fromDate: string
+  toDate: string
+  baseURL: string
+  apiKey: string
+  secret: string
+  requester: Requester
+}): Promise<FundResponse['Data']> => {
+  const method = 'GET'
+  const url = `/navapigateway/api/v1/FundAccountingData/GetOfficialNAVAndPerformanceReturnsForFund?globalFundID=${globalFundID}&fromDate=${fromDate}&toDate=${toDate}`
+
+  const requestConfig = {
+    baseURL: baseURL,
+    url: url,
+    method: method,
+    headers: getRequestHeaders({
+      method: method,
+      path: url,
+      body: '',
+      apiKey: apiKey,
+      secret: secret,
+    }),
+  }
+
+  const response = await requester.request<FundResponse>(
+    JSON.stringify(requestConfig),
+    requestConfig,
+  )
+
+  if (
+    !response.response.data ||
+    !Array.isArray(response.response.data.Data) ||
+    response.response.data.Data.length === 0
+  ) {
+    throw new AdapterError({
+      statusCode: 400,
+      message: `No fund found`,
+    })
+  }
+
+  return response.response.data.Data
+}
diff --git a/packages/sources/nav-libre/src/transport/nav.ts b/packages/sources/nav-libre/src/transport/nav.ts
new file mode 100644
index 0000000000..24a7bd2260
--- /dev/null
+++ b/packages/sources/nav-libre/src/transport/nav.ts
@@ -0,0 +1,125 @@
+import { BaseEndpointTypes, inputParameters } from '../endpoint/nav'
+import { getFund } from './fund'
+import { getFundDates } from './fund-dates'
+
+import { EndpointContext } from '@chainlink/external-adapter-framework/adapter'
+import { TransportDependencies } from '@chainlink/external-adapter-framework/transports'
+import { SubscriptionTransport } from '@chainlink/external-adapter-framework/transports/abstract/subscription'
+import { AdapterResponse, makeLogger, sleep } from '@chainlink/external-adapter-framework/util'
+import { Requester } from '@chainlink/external-adapter-framework/util/requester'
+import { AdapterInputError } from '@chainlink/external-adapter-framework/validation/error'
+import { clampStartByBusinessDays, parseDateString, toDateString } from './date-utils'
+const logger = makeLogger('NavLibreTransport')
+
+type RequestParams = typeof inputParameters.validated
+
+export class NavLibreTransport extends SubscriptionTransport<BaseEndpointTypes> {
+  config!: BaseEndpointTypes['Settings']
+  endpointName!: string
+  name!: string
+  requester!: Requester
+
+  async initialize(
+    dependencies: TransportDependencies<BaseEndpointTypes>,
+    adapterSettings: BaseEndpointTypes['Settings'],
+    endpointName: string,
+    transportName: string,
+  ): Promise<void> {
+    await super.initialize(dependencies, adapterSettings, endpointName, transportName)
+    this.endpointName = endpointName
+    this.requester = dependencies.requester
+    this.config = adapterSettings
+  }
+  async backgroundHandler(context: EndpointContext<BaseEndpointTypes>, entries: RequestParams[]) {
+    await Promise.all(entries.map(async (param) => this.handleRequest(context, param)))
+    await sleep(context.adapterSettings.BACKGROUND_EXECUTE_MS)
+  }
+
+  async handleRequest(_context: EndpointContext<BaseEndpointTypes>, param: RequestParams) {
+    let response: AdapterResponse<BaseEndpointTypes['Response']>
+    try {
+      response = await this._handleRequest(param)
+    } catch (e: unknown) {
+      const errorMessage = e instanceof Error ? e.message : 'Unknown error occurred'
+      logger.error(e, errorMessage)
+      response = {
+        statusCode: (e as AdapterInputError)?.statusCode || 502,
+        errorMessage,
+        timestamps: {
+          providerDataRequestedUnixMs: 0,
+          providerDataReceivedUnixMs: 0,
+          providerIndicatedTimeUnixMs: undefined,
+        },
+      }
+    }
+    await this.responseCache.write(this.name, [{ params: param, response }])
+  }
+
+  async _handleRequest(
+    param: RequestParams,
+  ): Promise<AdapterResponse<BaseEndpointTypes['Response']>> {
+    const providerDataRequestedUnixMs = Date.now()
+    logger.debug(`Handling request for globalFundID: ${param.globalFundID}`)
+    const { FromDate: earliestPossibleFromStr, ToDate: latestPossibleToStr } = await getFundDates({
+      globalFundID: param.globalFundID,
+      baseURL: this.config.API_ENDPOINT,
+      apiKey: this.config.API_KEY,
+      secret: this.config.SECRET_KEY,
+      requester: this.requester,
+    })
+
+    const earliestPossibleFrom = parseDateString(earliestPossibleFromStr)
+    const latestPossibleTo = parseDateString(latestPossibleToStr)
+
+    // Clamp to trailing-7-business-days window
+    const preferredFrom = clampStartByBusinessDays(
+      earliestPossibleFrom,
+      latestPossibleTo,
+      7, // 7 business days
+    )
+
+    logger.debug(
+      `Fetching NAV for globalFundID: ${param.globalFundID} from ${preferredFrom} to ${latestPossibleTo}`,
+    )
+    const fund = await getFund({
+      globalFundID: param.globalFundID,
+      fromDate: toDateString(preferredFrom),
+      toDate: toDateString(latestPossibleTo),
+      baseURL: this.config.API_ENDPOINT,
+      apiKey: this.config.API_KEY,
+      secret: this.config.SECRET_KEY,
+      requester: this.requester,
+    })
+
+    const ACCOUNTING_DATE_KEY = 'Accounting Date'
+    const NAV_PER_SHARE_KEY = 'NAV Per Share'
+    // Find the latest NAV entry by Accounting Date
+    const latest = fund.reduce((latestRow, row) =>
+      parseDateString(row[ACCOUNTING_DATE_KEY]) > parseDateString(latestRow[ACCOUNTING_DATE_KEY])
+        ? row
+        : latestRow,
+    )
+    // Assumes UTC
+    const providerIndicatedTimeUnixMs = parseDateString(latest[ACCOUNTING_DATE_KEY]).getTime()
+    return {
+      statusCode: 200,
+      result: latest[NAV_PER_SHARE_KEY],
+      data: {
+        globalFundID: param.globalFundID,
+        navPerShare: latest[NAV_PER_SHARE_KEY],
+        navDate: latest[ACCOUNTING_DATE_KEY],
+      },
+      timestamps: {
+        providerDataRequestedUnixMs,
+        providerDataReceivedUnixMs: Date.now(),
+        providerIndicatedTimeUnixMs,
+      },
+    }
+  }
+
+  getSubscriptionTtlFromConfig(adapterSettings: BaseEndpointTypes['Settings']): number {
+    return adapterSettings.WARMUP_SUBSCRIPTION_TTL
+  }
+}
+
+export const navLibreTransport = new NavLibreTransport()
diff --git a/packages/sources/nav-libre/test-payload.json b/packages/sources/nav-libre/test-payload.json
new file mode 100644
index 0000000000..6c48d1af28
--- /dev/null
+++ b/packages/sources/nav-libre/test-payload.json
@@ -0,0 +1,5 @@
+{
+ "requests": [{
+    "globalFundID": 1234,
+ }]
+}
diff --git a/packages/sources/nav-libre/test/integration/__snapshots__/adapter.test.ts.snap b/packages/sources/nav-libre/test/integration/__snapshots__/adapter.test.ts.snap
new file mode 100644
index 0000000000..584d8a0c1b
--- /dev/null
+++ b/packages/sources/nav-libre/test/integration/__snapshots__/adapter.test.ts.snap
@@ -0,0 +1,18 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`execute nav endpoint should return success 1`] = `
+{
+  "data": {
+    "globalFundID": 1234,
+    "navDate": "01-01-2024",
+    "navPerShare": 123.45,
+  },
+  "result": 123.45,
+  "statusCode": 200,
+  "timestamps": {
+    "providerDataReceivedUnixMs": 978307200000,
+    "providerDataRequestedUnixMs": 978307200000,
+    "providerIndicatedTimeUnixMs": 1704067200000,
+  },
+}
+`;
diff --git a/packages/sources/nav-libre/test/integration/adapter.test.ts b/packages/sources/nav-libre/test/integration/adapter.test.ts
new file mode 100644
index 0000000000..597858ecc7
--- /dev/null
+++ b/packages/sources/nav-libre/test/integration/adapter.test.ts
@@ -0,0 +1,49 @@
+import {
+  TestAdapter,
+  setEnvVariables,
+} from '@chainlink/external-adapter-framework/util/testing-utils'
+import * as nock from 'nock'
+import { mockResponseSuccess } from './fixtures'
+
+describe('execute', () => {
+  let spy: jest.SpyInstance
+  let testAdapter: TestAdapter
+  let oldEnv: NodeJS.ProcessEnv
+
+  beforeAll(async () => {
+    oldEnv = JSON.parse(JSON.stringify(process.env))
+    process.env.API_KEY = process.env.API_KEY ?? 'fake-api-key'
+    process.env.SECRET_KEY = 'SOME_SECRET_KEY'
+    process.env.BACKGROUND_EXECUTE_MS = process.env.BACKGROUND_EXECUTE_MS ?? '0'
+    const mockDate = new Date('2001-01-01T00:00:00.000Z')
+    spy = jest.spyOn(Date, 'now').mockReturnValue(mockDate.getTime())
+
+    const adapter = (await import('./../../src')).adapter
+    adapter.rateLimiting = undefined
+    testAdapter = await TestAdapter.startWithMockedCache(adapter, {
+      testAdapter: {} as TestAdapter<never>,
+    })
+  })
+
+  afterAll(async () => {
+    setEnvVariables(oldEnv)
+    await testAdapter.api.close()
+    nock.restore()
+    nock.cleanAll()
+    spy.mockRestore()
+  })
+
+  describe('nav endpoint', () => {
+    it('should return success', async () => {
+      const data = {
+        globalFundID: 1234,
+        endpoint: 'nav',
+        transport: 'rest',
+      }
+      mockResponseSuccess()
+      const response = await testAdapter.request(data)
+      expect(response.statusCode).toBe(200)
+      expect(response.json()).toMatchSnapshot()
+    })
+  })
+})
diff --git a/packages/sources/nav-libre/test/integration/fixtures.ts b/packages/sources/nav-libre/test/integration/fixtures.ts
new file mode 100644
index 0000000000..e06ba15f6e
--- /dev/null
+++ b/packages/sources/nav-libre/test/integration/fixtures.ts
@@ -0,0 +1,67 @@
+import nock from 'nock'
+
+export const mockResponseSuccess = (): nock.Scope =>
+  nock('https://api.navfundservices.com', {
+    encodedQueryParams: true,
+  })
+    .get('/navapigateway/api/v1/FundAccountingData/GetOfficialNAVAndPerformanceReturnsForFund')
+    .query(true)
+    .reply(
+      200,
+      {
+        Data: [
+          {
+            'Trading Level Net ROR': {
+              DTD: 0.1,
+              MTD: 0.2,
+              QTD: 0.3,
+              YTD: 0.4,
+              ITD: 0.5,
+            },
+            'Net ROR': {
+              DTD: 0.6,
+              MTD: 0.7,
+              QTD: 0.8,
+              YTD: 0.9,
+              ITD: 1.0,
+            },
+            'NAV Per Share': 123.45,
+            'Next NAV Price': 124.56,
+            'Accounting Date': '01-01-2024',
+            'Ending Balance': 1000000,
+          },
+        ],
+      },
+      [
+        'Content-Type',
+        'application/json',
+        'Connection',
+        'close',
+        'Vary',
+        'Accept-Encoding',
+        'Vary',
+        'Origin',
+      ],
+    )
+    .persist()
+    .get('/navapigateway/api/v1/ClientMasterData/GetAccountingDataDates')
+    .query(true)
+    .reply(
+      200,
+      {
+        LogID: 123456,
+        FromDate: '01-01-2024',
+        ToDate: '01-31-2024',
+      },
+      [
+        'Content-Type',
+        'application/json',
+        'Connection',
+        'close',
+        'Vary',
+        'Accept-Encoding',
+        'Vary',
+        'Origin',
+      ],
+    )
+    .persist()
diff --git a/packages/sources/nav-libre/test/unit/date-utils.test.ts b/packages/sources/nav-libre/test/unit/date-utils.test.ts
new file mode 100644
index 0000000000..e6fd0eb3f2
--- /dev/null
+++ b/packages/sources/nav-libre/test/unit/date-utils.test.ts
@@ -0,0 +1,59 @@
+import { differenceInBusinessDays, parse } from 'date-fns'
+import {
+  clampStartByBusinessDays,
+  DATE_FORMAT,
+  MAX_BUSINESS_DAYS,
+  parseDateString,
+  toDateString,
+} from '../../src/transport/date-utils'
+
+describe('date-utils', () => {
+  // Force UTC so tests behave the same everywhere
+  beforeAll(() => {
+    process.env.TZ = 'UTC'
+  })
+
+  describe('parseDateString', () => {
+    it('parses a valid MM-dd-yyyy string', () => {
+      const input = '07-11-2025'
+      const parsed = parseDateString(input)
+      expect(parsed).toBeInstanceOf(Date)
+      expect(parsed.getUTCFullYear()).toBe(2025)
+      expect(parsed.getUTCMonth()).toBe(6) // July is 6 (zero‑based)
+      expect(parsed.getUTCDate()).toBe(11)
+    })
+
+    it('throws for malformed input', () => {
+      const badInput = '2025-07-11'
+      expect(() => parseDateString(badInput)).toThrow(
+        `date must be in ${DATE_FORMAT} format: got "${badInput}"`,
+      )
+    })
+  })
+
+  describe('clampStartByBusinessDays', () => {
+    const to = parse('07-15-2025', DATE_FORMAT, new Date())
+
+    it('returns the original from date when within the limit', () => {
+      const from = parse('07-07-2025', DATE_FORMAT, new Date()) // 6 business days before
+      const result = clampStartByBusinessDays(from, to, MAX_BUSINESS_DAYS)
+      expect(result).toEqual(from)
+    })
+
+    it('clamps when span exceeds the limit', () => {
+      const from = parse('07-01-2025', DATE_FORMAT, new Date()) // >7 business days
+      const result = clampStartByBusinessDays(from, to, MAX_BUSINESS_DAYS)
+      // Should be exactly MAX_BUSINESS_DAYS business days before `to`
+      const span = differenceInBusinessDays(to, result)
+      expect(span).toBe(MAX_BUSINESS_DAYS)
+    })
+  })
+
+  describe('toDateString', () => {
+    it('formats a Date back to MM-dd-yyyy', () => {
+      const date = new Date(Date.UTC(2025, 6, 11))
+      const formatted = toDateString(date)
+      expect(formatted).toBe('07-11-2025')
+    })
+  })
+})
diff --git a/packages/sources/nav-libre/test/unit/fund-dates.test.ts b/packages/sources/nav-libre/test/unit/fund-dates.test.ts
new file mode 100644
index 0000000000..2de5cc05b9
--- /dev/null
+++ b/packages/sources/nav-libre/test/unit/fund-dates.test.ts
@@ -0,0 +1,48 @@
+import { Requester } from '@chainlink/external-adapter-framework/util/requester'
+import { FundDatesResponse, getFundDates } from '../../src/transport/fund-dates'
+
+describe('getFundDates', () => {
+  const mockRequester = {
+    request: jest.fn(),
+  } as unknown as Requester
+
+  const mockResponse: FundDatesResponse = {
+    LogID: 1,
+    FromDate: '01-01-2023',
+    ToDate: '01-31-2023',
+  }
+
+  beforeEach(() => {
+    jest.clearAllMocks()
+  })
+
+  it('returns fund dates on success', async () => {
+    mockRequester.request = jest.fn().mockResolvedValue({
+      response: { data: mockResponse },
+    })
+    const result = await getFundDates({
+      globalFundID: 123,
+      baseURL: 'http://base',
+      apiKey: 'apiKey',
+      secret: 'secret',
+      requester: mockRequester,
+    })
+
+    expect(result).toEqual(mockResponse)
+  })
+
+  it('throws if no data returned', async () => {
+    mockRequester.request = jest.fn().mockResolvedValue({
+      response: { data: undefined },
+    })
+    await expect(
+      getFundDates({
+        globalFundID: 123,
+        baseURL: 'http://base',
+        apiKey: 'apiKey',
+        secret: 'secret',
+        requester: mockRequester,
+      }),
+    ).rejects.toThrow()
+  })
+})
diff --git a/packages/sources/nav-libre/test/unit/fund.test.ts b/packages/sources/nav-libre/test/unit/fund.test.ts
new file mode 100644
index 0000000000..b47741f394
--- /dev/null
+++ b/packages/sources/nav-libre/test/unit/fund.test.ts
@@ -0,0 +1,54 @@
+import { Requester } from '@chainlink/external-adapter-framework/util/requester'
+import { getFund } from '../../src/transport/fund'
+
+describe('getFund', () => {
+  const mockRequester = {
+    request: jest.fn(),
+  } as unknown as Requester
+
+  const mockResponse = [
+    {
+      'Accounting Date': '01-01-2023',
+      'NAV Per Share': 123.45,
+    },
+  ]
+
+  beforeEach(() => {
+    jest.clearAllMocks()
+  })
+
+  it('returns fund data on success', async () => {
+    mockRequester.request = jest.fn().mockResolvedValue({
+      response: {
+        data: { Data: mockResponse },
+      },
+    })
+    const result = await getFund({
+      globalFundID: 123,
+      fromDate: '01-01-2000',
+      toDate: '01-05-2000',
+      baseURL: 'http://base',
+      apiKey: 'apiKey',
+      secret: 'secret',
+      requester: mockRequester,
+    })
+    expect(result).toEqual(mockResponse)
+  })
+
+  it('throws if no data returned', async () => {
+    mockRequester.request = jest.fn().mockResolvedValue({
+      response: { data: undefined },
+    })
+    await expect(
+      getFund({
+        globalFundID: 123,
+        fromDate: '01-01-2000',
+        toDate: '01-05-2000',
+        baseURL: 'http://base',
+        apiKey: 'apiKey',
+        secret: 'secret',
+        requester: mockRequester,
+      }),
+    ).rejects.toThrow()
+  })
+})
diff --git a/packages/sources/nav-libre/test/unit/nav.test.ts b/packages/sources/nav-libre/test/unit/nav.test.ts
new file mode 100644
index 0000000000..0176647a86
--- /dev/null
+++ b/packages/sources/nav-libre/test/unit/nav.test.ts
@@ -0,0 +1,157 @@
+import { TransportDependencies } from '@chainlink/external-adapter-framework/transports'
+import { LoggerFactoryProvider } from '@chainlink/external-adapter-framework/util'
+import { makeStub } from '@chainlink/external-adapter-framework/util/testing-utils'
+import { AdapterError } from '@chainlink/external-adapter-framework/validation/error'
+
+import { BaseEndpointTypes, inputParameters as navInputParams } from '../../src/endpoint/nav'
+import { NavLibreTransport } from '../../src/transport/nav'
+
+LoggerFactoryProvider.set()
+
+const FUND_ID = 123
+const transportName = 'nav_transport'
+const endpointName = 'nav'
+
+let transport: NavLibreTransport
+
+// adapter settings stub
+const adapterSettings = makeStub('adapterSettings', {
+  API_ENDPOINT: 'https://api.navfund.com',
+  API_KEY: 'apiKey',
+  SECRET_KEY: 'secret',
+  BACKGROUND_EXECUTE_MS: 0,
+  WARMUP_SUBSCRIPTION_TTL: 10_000,
+} as unknown as BaseEndpointTypes['Settings'])
+
+// requester stub that we'll control per‑test
+const requester = makeStub('requester', { request: jest.fn() })
+const responseCache = makeStub('responseCache', { write: jest.fn() })
+const dependencies = makeStub('dependencies', {
+  requester,
+  responseCache,
+  subscriptionSetFactory: { buildSet: jest.fn() },
+} as unknown as TransportDependencies<any>)
+
+// helper to pull the cached response written in handleRequest
+const getCachedResponse = () => (responseCache.write.mock.calls[0][1] as any)[0].response
+
+const FUND_DATES_RES = makeStub('fundDatesRes', {
+  response: {
+    data: { LogID: 1, FromDate: '06-01-2025', ToDate: '07-01-2025' },
+  },
+})
+
+const FUND_ROWS = [
+  { 'NAV Per Share': 50, 'Accounting Date': '06-10-2025' },
+  { 'NAV Per Share': 150, 'Accounting Date': '06-25-2025' },
+]
+
+const FUND_RES = makeStub('fundRes', {
+  response: {
+    data: { Data: FUND_ROWS },
+  },
+})
+
+describe('NavLibreTransport – handleRequest', () => {
+  beforeEach(async () => {
+    transport = new NavLibreTransport() as unknown as InstanceType<typeof NavLibreTransport>
+    await transport.initialize(dependencies, adapterSettings, endpointName, transportName)
+    jest.resetAllMocks()
+  })
+
+  it('returns latest NAV and writes to cache', async () => {
+    requester.request.mockResolvedValueOnce(FUND_DATES_RES)
+    requester.request.mockResolvedValueOnce(FUND_RES)
+
+    const param = makeStub('param', { globalFundID: FUND_ID } as typeof navInputParams.validated)
+
+    await transport.handleRequest({ adapterSettings } as any, param)
+
+    expect(responseCache.write).toHaveBeenCalledTimes(1)
+
+    const cached = getCachedResponse()
+    expect(cached).toEqual({
+      statusCode: 200,
+      result: 150,
+      data: {
+        globalFundID: FUND_ID,
+        navPerShare: 150,
+        navDate: '06-25-2025',
+      },
+      timestamps: expect.objectContaining({
+        providerDataRequestedUnixMs: expect.any(Number),
+        providerDataReceivedUnixMs: expect.any(Number),
+        providerIndicatedTimeUnixMs: expect.any(Number),
+      }),
+    })
+    expect(requester.request).toHaveBeenNthCalledWith(
+      1,
+      expect.any(String),
+      expect.objectContaining({
+        url: expect.stringContaining('/GetAccountingDataDates'),
+      }),
+    )
+
+    expect(requester.request).toHaveBeenNthCalledWith(
+      2,
+      expect.any(String),
+      expect.objectContaining({
+        url: expect.stringContaining('/GetOfficialNAVAndPerformanceReturnsForFund'),
+      }),
+    )
+  })
+
+  it('maps downstream AdapterError to 502 response', async () => {
+    requester.request.mockResolvedValueOnce(FUND_DATES_RES) // first OK
+    requester.request.mockRejectedValueOnce(new AdapterError({ message: 'boom' }))
+
+    const param = makeStub('param', { globalFundID: FUND_ID } as typeof navInputParams.validated)
+
+    await transport.handleRequest({ adapterSettings } as any, param)
+
+    expect(responseCache.write).toHaveBeenCalledTimes(1)
+    const cached = getCachedResponse()
+    expect(cached.statusCode).toBe(500)
+    expect(cached.errorMessage).toContain('boom')
+  })
+
+  it('uses provider earliestFrom when span <= 7 business days', async () => {
+    const shortSpanDates = makeStub('dates', {
+      response: { data: { LogID: 1, FromDate: '06-28-2025', ToDate: '07-01-2025' } },
+    })
+    requester.request.mockResolvedValueOnce(shortSpanDates)
+
+    const fundRows = [
+      { 'NAV Per Share': 42, 'Accounting Date': '06-30-2025' },
+      { 'NAV Per Share': 43, 'Accounting Date': '07-01-2025' },
+    ]
+    const fundRes = makeStub('fundRes', { response: { data: { Data: fundRows } } })
+    requester.request.mockResolvedValueOnce(fundRes)
+
+    const param = makeStub('param', { globalFundID: FUND_ID } as typeof navInputParams.validated)
+
+    await transport.handleRequest({ adapterSettings } as any, param)
+
+    expect(requester.request).toHaveBeenNthCalledWith(
+      2,
+      expect.any(String),
+      expect.objectContaining({
+        url: expect.stringContaining('fromDate=06-28-2025'),
+      }),
+    )
+  })
+
+  it('caches 400 when Fund rows are empty', async () => {
+    requester.request.mockResolvedValueOnce(FUND_DATES_RES)
+    requester.request.mockResolvedValueOnce(
+      makeStub('emptyFund', { response: { data: { Data: [] } } }),
+    )
+    const param = makeStub('param', { globalFundID: FUND_ID } as typeof navInputParams.validated)
+
+    await transport.handleRequest({ adapterSettings } as any, param)
+
+    const cached = getCachedResponse()
+    expect(cached.statusCode).toBe(400)
+    expect(cached.errorMessage).toMatch(/No fund found/i)
+  })
+})
diff --git a/packages/sources/nav-libre/tsconfig.json b/packages/sources/nav-libre/tsconfig.json
new file mode 100644
index 0000000000..f59363fd76
--- /dev/null
+++ b/packages/sources/nav-libre/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*", "src/**/*.json"],
+  "exclude": ["dist", "**/*.spec.ts", "**/*.test.ts"]
+}
diff --git a/packages/sources/nav-libre/tsconfig.test.json b/packages/sources/nav-libre/tsconfig.test.json
new file mode 100755
index 0000000000..e3de28cb5c
--- /dev/null
+++ b/packages/sources/nav-libre/tsconfig.test.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "include": ["src/**/*", "**/test", "src/**/*.json"],
+  "compilerOptions": {
+    "noEmit": true
+  }
+}
diff --git a/packages/tsconfig.json b/packages/tsconfig.json
index d7187ebd5f..4e731587e6 100644
--- a/packages/tsconfig.json
+++ b/packages/tsconfig.json
@@ -515,6 +515,9 @@
     {
       "path": "./sources/nav-generic"
     },
+    {
+      "path": "./sources/nav-libre"
+    },
     {
       "path": "./sources/ncfx"
     },
diff --git a/packages/tsconfig.test.json b/packages/tsconfig.test.json
index ea592c2aef..5caa99f56f 100644
--- a/packages/tsconfig.test.json
+++ b/packages/tsconfig.test.json
@@ -515,6 +515,9 @@
     {
       "path": "./sources/nav-generic/tsconfig.test.json"
     },
+    {
+      "path": "./sources/nav-libre/tsconfig.test.json"
+    },
     {
       "path": "./sources/ncfx/tsconfig.test.json"
     },
diff --git a/yarn.lock b/yarn.lock
index 2b9231ff64..4865778f68 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5008,6 +5008,23 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@chainlink/nav-libre-adapter@workspace:packages/sources/nav-libre":
+  version: 0.0.0-use.local
+  resolution: "@chainlink/nav-libre-adapter@workspace:packages/sources/nav-libre"
+  dependencies:
+    "@chainlink/external-adapter-framework": "npm:2.6.0"
+    "@types/crypto-js": "npm:^4"
+    "@types/jest": "npm:^29.5.14"
+    "@types/node": "npm:22.14.1"
+    crypto-js: "npm:^4.2.0"
+    date-fns: "npm:^4.1.0"
+    nock: "npm:13.5.6"
+    tslib: "npm:2.4.1"
+    typescript: "npm:5.8.3"
+    uuid: "npm:^11.1.0"
+  languageName: unknown
+  linkType: soft
+
 "@chainlink/ncfx-adapter@workspace:*, @chainlink/ncfx-adapter@workspace:packages/sources/ncfx":
   version: 0.0.0-use.local
   resolution: "@chainlink/ncfx-adapter@workspace:packages/sources/ncfx"
@@ -12505,7 +12522,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/crypto-js@npm:4.2.2":
+"@types/crypto-js@npm:4.2.2, @types/crypto-js@npm:^4":
   version: 4.2.2
   resolution: "@types/crypto-js@npm:4.2.2"
   checksum: 10/a40fc5a9219fd33f54ba3e094c5e5ab2904d3106681a76f1029bb038976591e9c8959099963bf4474fde21c2d8d00c1f896445206a3a58f85588f9cb1bd96a9a
@@ -16420,7 +16437,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"crypto-js@npm:4.2.0":
+"crypto-js@npm:4.2.0, crypto-js@npm:^4.2.0":
   version: 4.2.0
   resolution: "crypto-js@npm:4.2.0"
   checksum: 10/c7bcc56a6e01c3c397e95aa4a74e4241321f04677f9a618a8f48a63b5781617248afb9adb0629824792e7ec20ca0d4241a49b6b2938ae6f973ec4efc5c53c924
@@ -16614,7 +16631,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"date-fns@npm:4.1.0":
+"date-fns@npm:4.1.0, date-fns@npm:^4.1.0":
   version: 4.1.0
   resolution: "date-fns@npm:4.1.0"
   checksum: 10/d5f6e9de5bbc52310f786099e18609289ed5e30af60a71e0646784c8185ddd1d0eebcf7c96b7faaaefc4a8366f3a3a4244d099b6d0866ee2bec80d1361e64342
@@ -32133,6 +32150,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"uuid@npm:^11.1.0":
+  version: 11.1.0
+  resolution: "uuid@npm:11.1.0"
+  bin:
+    uuid: dist/esm/bin/uuid
+  checksum: 10/d2da43b49b154d154574891ced66d0c83fc70caaad87e043400cf644423b067542d6f3eb641b7c819224a7cd3b4c2f21906acbedd6ec9c6a05887aa9115a9cf5
+  languageName: node
+  linkType: hard
+
 "uuid@npm:^3.3.2":
   version: 3.4.0
   resolution: "uuid@npm:3.4.0"