diff --git a/src/commands/scan/finalize-tier1-scan.mts b/src/commands/scan/finalize-tier1-scan.mts
new file mode 100644
index 000000000..5cfbe5ef9
--- /dev/null
+++ b/src/commands/scan/finalize-tier1-scan.mts
@@ -0,0 +1,28 @@
+import { sendApiRequest } from '../../utils/api.mts'
+
+import type { CResult } from '../../types.mts'
+
+export type FinalizeTier1ScanOptions = {
+  tier1_reachability_scan_id: string
+  report_run_id: string
+}
+
+/**
+ * Finalize a tier1 reachability scan.
+ *  - Associates the tier1 reachability scan metadata with the full scan.
+ *  - Sets the tier1 reachability scan to "finalized" state.
+ */
+export async function finalizeTier1Scan(
+  tier1_reachability_scan_id: string,
+  report_run_id: string,
+): Promise<CResult<unknown>> {
+  // we do not use the SDK here because the tier1-reachability-scan/finalize is a hidden
+  // endpoint that is not part of the OpenAPI specification.
+  return await sendApiRequest('tier1-reachability-scan/finalize', {
+    method: 'POST',
+    body: {
+      tier1_reachability_scan_id,
+      report_run_id,
+    },
+  })
+}
diff --git a/src/commands/scan/handle-create-new-scan.mts b/src/commands/scan/handle-create-new-scan.mts
index 579b7fff4..e0ec7ef90 100644
--- a/src/commands/scan/handle-create-new-scan.mts
+++ b/src/commands/scan/handle-create-new-scan.mts
@@ -4,12 +4,16 @@ import { pluralize } from '@socketsecurity/registry/lib/words'
 
 import { fetchCreateOrgFullScan } from './fetch-create-org-full-scan.mts'
 import { fetchSupportedScanFileNames } from './fetch-supported-scan-file-names.mts'
+import { finalizeTier1Scan } from './finalize-tier1-scan.mts'
 import { handleScanReport } from './handle-scan-report.mts'
 import { outputCreateNewScan } from './output-create-new-scan.mts'
 import constants from '../../constants.mts'
 import { handleApiCall } from '../../utils/api.mts'
 import { checkCommandInput } from '../../utils/check-input.mts'
-import { spawnCoana } from '../../utils/coana.mts'
+import {
+  extractTier1ReachabilityScanId,
+  spawnCoana,
+} from '../../utils/coana.mts'
 import { getPackageFilesForScan } from '../../utils/path-resolve.mts'
 import { setupSdk } from '../../utils/sdk.mts'
 import { readOrDefaultSocketJson } from '../../utils/socketjson.mts'
@@ -112,6 +116,7 @@ export async function handleCreateNewScan({
   }
 
   let scanPaths: string[] = packagePaths
+  let tier1ReachabilityScanId: string | undefined
 
   // If reachability is enabled, perform reachability analysis
   if (reach) {
@@ -131,6 +136,7 @@ export async function handleCreateNewScan({
     }
 
     scanPaths = reachResult.data?.scanPaths || []
+    tier1ReachabilityScanId = reachResult.data?.tier1ReachabilityScanId
   }
 
   const fullScanCResult = await fetchCreateOrgFullScan(
@@ -152,6 +158,15 @@ export async function handleCreateNewScan({
     },
   )
 
+  if (
+    fullScanCResult.ok &&
+    reach &&
+    tier1ReachabilityScanId &&
+    fullScanCResult.data?.id
+  ) {
+    await finalizeTier1Scan(tier1ReachabilityScanId, fullScanCResult.data?.id)
+  }
+
   if (fullScanCResult.ok && report) {
     if (fullScanCResult.data?.id) {
       await handleScanReport({
@@ -195,7 +210,9 @@ async function performReachabilityAnalysis({
   branchName: string
   outputKind: OutputKind
   interactive: boolean
-}): Promise<CResult<{ scanPaths?: string[] }>> {
+}): Promise<
+  CResult<{ scanPaths?: string[]; tier1ReachabilityScanId: string | undefined }>
+> {
   logger.info('Starting reachability analysis...')
 
   packagePaths = packagePaths.filter(
@@ -275,6 +292,9 @@ async function performReachabilityAnalysis({
     ok: true,
     data: {
       scanPaths: [constants.DOT_SOCKET_DOT_FACTS_JSON],
+      tier1ReachabilityScanId: extractTier1ReachabilityScanId(
+        constants.DOT_SOCKET_DOT_FACTS_JSON,
+      ),
     },
   }
 }
diff --git a/src/utils/api.mts b/src/utils/api.mts
index 9d77cbe3e..ba522a3bf 100644
--- a/src/utils/api.mts
+++ b/src/utils/api.mts
@@ -285,3 +285,103 @@ export async function queryApiSafeJson<T>(
     }
   }
 }
+
+export async function sendApiRequest<T>(
+  path: string,
+  options: {
+    method: 'POST' | 'PUT'
+    body?: unknown
+    fetchSpinnerDesc?: string
+  },
+): Promise<CResult<T>> {
+  const apiToken = getDefaultToken()
+  if (!apiToken) {
+    return {
+      ok: false,
+      message: 'Authentication Error',
+      cause:
+        'User must be authenticated to run this command. To log in, run the command `socket login` and enter your Socket API token.',
+    }
+  }
+
+  const baseUrl = getDefaultApiBaseUrl() || ''
+  if (!baseUrl) {
+    logger.warn(
+      'API endpoint is not set and default was empty. Request is likely to fail.',
+    )
+  }
+
+  // Lazily access constants.spinner.
+  const { spinner } = constants
+
+  if (options.fetchSpinnerDesc) {
+    spinner.start(`Requesting ${options.fetchSpinnerDesc} from API...`)
+  }
+
+  let result
+  try {
+    const fetchOptions = {
+      method: options.method,
+      headers: {
+        Authorization: `Basic ${btoa(`${apiToken}:`)}`,
+        'Content-Type': 'application/json',
+      },
+      ...(options.body ? { body: JSON.stringify(options.body) } : {}),
+    }
+
+    result = await fetch(
+      `${baseUrl}${baseUrl.endsWith('/') ? '' : '/'}${path}`,
+      fetchOptions,
+    )
+    if (options.fetchSpinnerDesc) {
+      spinner.successAndStop(
+        `Received Socket API response (after requesting ${options.fetchSpinnerDesc}).`,
+      )
+    }
+  } catch (e) {
+    if (options.fetchSpinnerDesc) {
+      spinner.failAndStop(
+        `An error was thrown while requesting ${options.fetchSpinnerDesc}.`,
+      )
+    }
+
+    const cause = (e as undefined | { message: string })?.message
+
+    debugFn('error', `caught: await fetch() ${options.method} error`)
+    debugDir('inspect', { error: e })
+
+    return {
+      ok: false,
+      message: 'API Request failed to complete',
+      ...(cause ? { cause } : {}),
+    }
+  }
+
+  if (!result.ok) {
+    const cause = await getErrorMessageForHttpStatusCode(result.status)
+    return {
+      ok: false,
+      message: 'Socket API returned an error',
+      cause: `${result.statusText}${cause ? ` (cause: ${cause})` : ''}`,
+      data: {
+        code: result.status,
+      },
+    }
+  }
+
+  try {
+    const data = await result.json()
+    return {
+      ok: true,
+      data: data as T,
+    }
+  } catch (e) {
+    debugFn('error', 'caught: await result.json() error')
+    debugDir('inspect', { error: e })
+    return {
+      ok: false,
+      message: 'API Request failed to complete',
+      cause: 'There was an unexpected error trying to parse the response JSON',
+    }
+  }
+}
diff --git a/src/utils/coana.mts b/src/utils/coana.mts
index 9fe83fbff..59528f32d 100644
--- a/src/utils/coana.mts
+++ b/src/utils/coana.mts
@@ -1,3 +1,5 @@
+import { readFileSync } from 'node:fs'
+
 import { spawn } from '@socketsecurity/registry/lib/spawn'
 
 import { getDefaultOrgSlug } from '../commands/ci/fetch-default-org-slug.mts'
@@ -14,7 +16,7 @@ export async function spawnCoana(
   args: string[] | readonly string[],
   options?: SpawnOptions | undefined,
   extra?: SpawnExtra | undefined,
-): Promise<CResult<unknown>> {
+): Promise<CResult<string>> {
   const { env: spawnEnv } = { __proto__: null, ...options } as SpawnOptions
   const mixinsEnv: Record<string, string> = {
     // Lazily access constants.ENV.INLINED_SOCKET_CLI_VERSION.
@@ -59,3 +61,15 @@ export async function spawnCoana(
     return { ok: false, data: e, message }
   }
 }
+
+export function extractTier1ReachabilityScanId(
+  socketFactsFile: string,
+): string | undefined {
+  try {
+    const content = readFileSync(socketFactsFile, 'utf8')
+    const json = JSON.parse(content)
+    return json.tier1ReachabilityScanId
+  } catch {
+    return undefined
+  }
+}