diff --git a/apps/sim/lib/credential-groups/__integration__/organization-account-outbound.integration.ts b/apps/sim/lib/credential-groups/__integration__/organization-account-outbound.integration.ts
new file mode 100644
index 00000000000..503a432e2ff
--- /dev/null
+++ b/apps/sim/lib/credential-groups/__integration__/organization-account-outbound.integration.ts
@@ -0,0 +1,275 @@
+import { createHash } from 'node:crypto'
+import { createServer } from 'node:http'
+import { db } from '@sim/db'
+import { credential, credentialGroupEnrollment, member, organization, user } from '@sim/db/schema'
+import { readTestRedisUrl } from '@sim/db/testing/test-infrastructure'
+import { createSessionPrincipal } from '@sim/testing/factories/principal.factory'
+import { generateId } from '@sim/utils/id'
+import { toRecord } from '@sim/utils/object'
+import { eq, inArray } from 'drizzle-orm'
+import { afterAll, beforeAll, describe, expect, it, vi } from 'vitest'
+import { env } from '@/lib/core/config/env'
+import {
+  resolveCurrentOutboundRoute,
+  runWithOutboundOrganization,
+} from '@/lib/core/network/context.server'
+import { startOrganizationAccountConnection } from '@/lib/credential-groups/application/organization-accounts'
+import { reconnectPersonalOrganizationAccount } from '@/lib/credential-groups/application/personal-organization-accounts'
+import { createManagedMcpConnector } from '@/lib/credential-groups/managed-mcp-service'
+import { consumeCredentialGroupMcpOAuthAttempt } from '@/lib/credential-groups/mcp-oauth-state'
+import { createViewerCredentialGroupEnrollment } from '@/lib/credential-groups/self-enrollment'
+import { ensureWorkspaceAccountsGroup } from '@/lib/credential-groups/service'
+import { encryptManagedMcpTokens } from '@/lib/credentials/managed-mcp'
+import * as oauth from '@/lib/mcp/oauth/auth'
+import { createSsrfGuardedMcpFetch } from '@/lib/mcp/pinned-fetch'
+
+const RESOURCE = 'https://mcp.lucid.app/mcp/readonly'
+const ISSUER = 'https://oauth.fixture.test'
+const owner = generateId()
+const blockedOwner = generateId()
+const outsider = generateId()
+const directOrg = generateId()
+const blockedOrg = generateId()
+const servers = new Map<string, string>()
+const grants = new Map<string, { credentialId: string; enrollmentId: string }>()
+const requests: string[] = []
+
+/** Real OAuth discovery and registration over a socket; only the remote destination is replaced. */
+const providerServer = createServer(async (request, response) => {
+  const path = request.url ?? '/'
+  requests.push(path)
+  response.setHeader('content-type', 'application/json')
+  if (path.includes('oauth-protected-resource')) {
+    response.end(JSON.stringify({ resource: RESOURCE, authorization_servers: [ISSUER] }))
+  } else if (path.includes('oauth-authorization-server') || path.includes('openid-configuration')) {
+    response.end(
+      JSON.stringify({
+        issuer: ISSUER,
+        authorization_endpoint: `${ISSUER}/authorize`,
+        token_endpoint: `${ISSUER}/token`,
+        registration_endpoint: `${ISSUER}/register`,
+        response_types_supported: ['code'],
+        code_challenge_methods_supported: ['S256'],
+        token_endpoint_auth_methods_supported: ['none'],
+      })
+    )
+  } else if (path === '/register' && request.method === 'POST') {
+    const chunks: Buffer[] = []
+    for await (const chunk of request) chunks.push(Buffer.from(chunk))
+    const metadata: unknown = JSON.parse(Buffer.concat(chunks).toString())
+    response.writeHead(201).end(
+      JSON.stringify({
+        ...toRecord(metadata),
+        client_id: 'fixture-dynamic-client',
+      })
+    )
+  } else {
+    response.writeHead(404).end(JSON.stringify({ error: 'unknown fixture endpoint' }))
+  }
+})
+
+beforeAll(async () => {
+  Object.assign(env, {
+    REDIS_URL: readTestRedisUrl(),
+    OUTBOUND_ROUTING_SOURCE: 'env',
+    OUTBOUND_ROUTING_CONFIG: JSON.stringify({
+      schemaVersion: 1,
+      revision: 'account-oauth-fixture',
+      organizations: { [directOrg]: { kind: 'direct' }, [blockedOrg]: { kind: 'blocked' } },
+    }),
+    OUTBOUND_GATEWAYS: JSON.stringify({
+      direct: {
+        organizationId: directOrg,
+        url: 'https://direct.fixture.test/',
+        credentialId: 'direct',
+      },
+      blocked: {
+        organizationId: blockedOrg,
+        url: 'https://blocked.fixture.test/',
+        credentialId: 'blocked',
+      },
+    }),
+    OUTBOUND_GATEWAY_CREDENTIALS: JSON.stringify({
+      direct: { token: 'd'.repeat(32) },
+      blocked: { token: 'b'.repeat(32) },
+    }),
+  })
+  await db.insert(user).values(
+    [owner, blockedOwner, outsider].map((id) => ({
+      id,
+      name: 'OAuth fixture',
+      email: `${id}@fixture.test`,
+      emailVerified: true,
+      createdAt: new Date(),
+      updatedAt: new Date(),
+    }))
+  )
+  for (const organizationId of [directOrg, blockedOrg]) {
+    const userId = organizationId === directOrg ? owner : blockedOwner
+    await db
+      .insert(organization)
+      .values({ id: organizationId, name: 'OAuth fixture', slug: organizationId })
+    await db.insert(member).values({ id: generateId(), organizationId, userId, role: 'owner' })
+    const group = await ensureWorkspaceAccountsGroup(
+      { kind: 'organization', organizationId },
+      userId
+    )
+    const { mcpServer } = await db.transaction((tx) =>
+      createManagedMcpConnector(
+        {
+          organizationId,
+          credentialGroupId: group.id,
+          userId,
+          validated: { input: { connectorId: 'lucid' }, url: RESOURCE },
+        },
+        tx
+      )
+    )
+    servers.set(organizationId, mcpServer.id)
+    const { enrollment } = await createViewerCredentialGroupEnrollment({
+      organizationId,
+      credentialGroupId: group.id,
+      userId,
+    })
+    const credentialId = `mcp-cg-${generateId()}`
+    await db.insert(credential).values({
+      id: credentialId,
+      organizationId,
+      type: 'managed_mcp',
+      displayName: 'OAuth fixture',
+      grantedAt: new Date(),
+      credentialGroupEnrollmentId: enrollment.id,
+      mcpServerId: mcpServer.id,
+      managedOauthStatus: 'active',
+      mcpTools: [],
+      encryptedOauthTokenSet: await encryptManagedMcpTokens({
+        access_token: 'fixture-access',
+        token_type: 'Bearer',
+      }),
+    })
+    grants.set(organizationId, { credentialId, enrollmentId: enrollment.id })
+  }
+  await new Promise<void>((resolve) => providerServer.listen(0, '127.0.0.1', resolve))
+  const address = providerServer.address()
+  if (!address || typeof address === 'string') throw new Error('OAuth fixture did not bind')
+  const origin = `http://127.0.0.1:${address.port}`
+  const guardedFetch = createSsrfGuardedMcpFetch({ serverUrl: origin })
+  const authenticate = oauth.mcpAuthGuarded
+  vi.spyOn(oauth, 'mcpAuthGuarded').mockImplementation((provider, options) =>
+    authenticate(provider, {
+      ...options,
+      fetchFn: (input, init) => {
+        const remote = new URL(input instanceof Request ? input.url : input)
+        if (![new URL(RESOURCE).origin, ISSUER].includes(remote.origin)) {
+          throw new Error('Unexpected OAuth fixture origin')
+        }
+        return guardedFetch(new URL(`${remote.pathname}${remote.search}`, origin), init)
+      },
+    })
+  )
+})
+
+afterAll(async () => {
+  if (providerServer.listening)
+    await new Promise<void>((resolve, reject) => {
+      providerServer.close((error) => (error ? reject(error) : resolve()))
+      providerServer.closeAllConnections()
+    })
+  await db.delete(organization).where(inArray(organization.id, [directOrg, blockedOrg]))
+  await db.delete(user).where(inArray(user.id, [owner, blockedOwner, outsider]))
+})
+
+function connect(
+  organizationId: string,
+  userId = owner,
+  mcpServerId = servers.get(organizationId)!
+) {
+  return startOrganizationAccountConnection.execute({
+    principal: createSessionPrincipal({ userId, sessionId: generateId() }),
+    input: {
+      organizationId,
+      mcpServerId,
+      oauthCompletionId: generateId(),
+      returnTo: 'integrations',
+    },
+  })
+}
+
+function reconnect(organizationId: string, userId = owner) {
+  return reconnectPersonalOrganizationAccount.execute({
+    principal: createSessionPrincipal({ userId, sessionId: generateId() }),
+    input: {
+      credentialId: grants.get(organizationId)!.credentialId,
+      oauthCompletionId: generateId(),
+    },
+  })
+}
+
+async function verifyAuthorization(start: typeof connect | typeof reconnect) {
+  const result = await start(directOrg)
+  if (!result.authorizationUrl) throw new Error('OAuth authorization URL is missing')
+  const authorization = new URL(result.authorizationUrl)
+  expect(`${authorization.origin}${authorization.pathname}`).toBe(`${ISSUER}/authorize`)
+  expect(authorization.searchParams.get('client_id')).toBe('fixture-dynamic-client')
+  expect(authorization.searchParams.get('code_challenge_method')).toBe('S256')
+  const state = authorization.searchParams.get('state')!
+  const attempt = await consumeCredentialGroupMcpOAuthAttempt(state)
+  expect(attempt).toMatchObject({
+    organizationId: directOrg,
+    userId: owner,
+    mcpServerId: servers.get(directOrg),
+    returnTo: 'integrations',
+  })
+  expect(authorization.searchParams.get('code_challenge')).toBe(
+    createHash('sha256').update(attempt!.codeVerifier).digest('base64url')
+  )
+  expect(await consumeCredentialGroupMcpOAuthAttempt(state)).toBeNull()
+}
+
+describe.each([
+  { name: 'Connect', start: connect },
+  { name: 'Reconnect', start: reconnect },
+])('$name account OAuth outbound ownership', ({ start }) => {
+  it('starts dynamic OAuth with a bound single-use attempt when no ambient scope exists', async () => {
+    await verifyAuthorization(start)
+    await expect(resolveCurrentOutboundRoute()).rejects.toMatchObject({ code: 'MISSING_SCOPE' })
+  })
+  it('uses authorized ownership instead of an ambient blocked organization and restores the outer scope', async () => {
+    await runWithOutboundOrganization(blockedOrg, async () => {
+      await verifyAuthorization(start)
+      await expect(resolveCurrentOutboundRoute()).rejects.toMatchObject({ code: 'ROUTE_BLOCKED' })
+    })
+  })
+  it('does not bypass an organization block through ambient platform scope', async () => {
+    const before = requests.length
+    await runWithOutboundOrganization(null, async () => {
+      await expect(start(blockedOrg, blockedOwner)).rejects.toMatchObject({
+        code: 'ROUTE_BLOCKED',
+      })
+      expect(await resolveCurrentOutboundRoute()).toEqual({ kind: 'direct' })
+    })
+    expect(requests.length).toBe(before)
+  })
+})
+
+describe('Account authorization before outbound OAuth', () => {
+  it('denies nonmembers and cross-organization providers before contacting OAuth', async () => {
+    const before = requests.length
+    await expect(connect(directOrg, outsider)).rejects.toMatchObject({ code: 'not_found' })
+    await expect(connect(directOrg, owner, servers.get(blockedOrg))).rejects.toMatchObject({
+      code: 'not_found',
+    })
+    expect(requests.length).toBe(before)
+  })
+  it('denies another contributor and a revoked enrollment during reconnect', async () => {
+    const before = requests.length
+    await expect(reconnect(directOrg, outsider)).rejects.toMatchObject({ code: 'not_found' })
+    const enrollmentId = grants.get(directOrg)!.enrollmentId
+    await db
+      .update(credentialGroupEnrollment)
+      .set({ status: 'revoked' })
+      .where(eq(credentialGroupEnrollment.id, enrollmentId))
+    await expect(reconnect(directOrg)).rejects.toMatchObject({ code: 'forbidden' })
+    expect(requests.length).toBe(before)
+  })
+})
diff --git a/apps/sim/lib/credential-groups/application/organization-accounts.ts b/apps/sim/lib/credential-groups/application/organization-accounts.ts
index a5dcfe6dec2..3cfe7c5e6e0 100644
--- a/apps/sim/lib/credential-groups/application/organization-accounts.ts
+++ b/apps/sim/lib/credential-groups/application/organization-accounts.ts
@@ -12,6 +12,7 @@ import {
   defineOrganizationOperation,
   type OrganizationOperation,
 } from '@/lib/core/application/organization-operation'
+import { runWithOutboundOrganization } from '@/lib/core/network/context.server'
 import { OrchestrationError } from '@/lib/core/orchestration/types'
 import { validateUpdateCredentialGroupInput } from '@/lib/credential-groups/application/validation'
 import { loadScopedAccountsCredentialListContext } from '@/lib/credential-groups/credentials'
@@ -119,41 +120,43 @@ export function defineOrganizationAccountsUseCase<
         if (group)
           await requireOrganizationAccountsSetup(context.organizationId, group.credentialGroupId)
       }
-      const result = await definition.execute({ input, context }).catch((error: unknown) => {
-        if (error instanceof ManagedMcpConnectorError)
-          throw new OrchestrationError(
-            error.code === 'bad_gateway' ? 'internal' : error.code,
-            error.message
-          )
-        if (error instanceof CredentialGroupEnrollmentError)
-          throw new OrchestrationError(
-            error.status === 404
-              ? 'not_found'
-              : error.status === 409
-                ? 'conflict'
-                : error.status === 400
-                  ? 'validation'
-                  : 'internal',
-            error.message
-          )
-        throw error
-      })
-      const audit = definition.projectAudit?.(result)
-      if (audit)
-        recordAudit({
-          ...audit,
-          actorId: context.userId,
-          action: AuditAction.CREDENTIAL_GROUP_UPDATED,
-          resourceType: AuditResourceType.CREDENTIAL_GROUP,
-          metadata: {
-            organizationId: context.organizationId,
-            operation: definition.operation.id,
-            actor: resolvePrincipalAuditAttribution(principal).actor,
-          },
-          request,
+      return runWithOutboundOrganization(context.organizationId, async () => {
+        const result = await definition.execute({ input, context }).catch((error: unknown) => {
+          if (error instanceof ManagedMcpConnectorError)
+            throw new OrchestrationError(
+              error.code === 'bad_gateway' ? 'internal' : error.code,
+              error.message
+            )
+          if (error instanceof CredentialGroupEnrollmentError)
+            throw new OrchestrationError(
+              error.status === 404
+                ? 'not_found'
+                : error.status === 409
+                  ? 'conflict'
+                  : error.status === 400
+                    ? 'validation'
+                    : 'internal',
+              error.message
+            )
+          throw error
         })
-      await definition.afterSuccess?.({ result, context })
-      return result
+        const audit = definition.projectAudit?.(result)
+        if (audit)
+          recordAudit({
+            ...audit,
+            actorId: context.userId,
+            action: AuditAction.CREDENTIAL_GROUP_UPDATED,
+            resourceType: AuditResourceType.CREDENTIAL_GROUP,
+            metadata: {
+              organizationId: context.organizationId,
+              operation: definition.operation.id,
+              actor: resolvePrincipalAuditAttribution(principal).actor,
+            },
+            request,
+          })
+        await definition.afterSuccess?.({ result, context })
+        return result
+      })
     },
   }
 }
diff --git a/apps/sim/lib/credential-groups/application/personal-organization-accounts.ts b/apps/sim/lib/credential-groups/application/personal-organization-accounts.ts
index e600968903c..ade2baabfa7 100644
--- a/apps/sim/lib/credential-groups/application/personal-organization-accounts.ts
+++ b/apps/sim/lib/credential-groups/application/personal-organization-accounts.ts
@@ -12,6 +12,7 @@ import { sha256Hex } from '@sim/security/hash'
 import { generateId } from '@sim/utils/id'
 import { and, asc, eq, gt, inArray, isNotNull } from 'drizzle-orm'
 import { defineOperation } from '@/lib/core/application'
+import { runWithOutboundOrganization } from '@/lib/core/network/context.server'
 import { OrchestrationError } from '@/lib/core/orchestration/types'
 import { sameResourceScopeCondition } from '@/lib/core/resource-scope.server'
 import { createCredentialGroupOAuthStartUrl } from '@/lib/credential-groups/enrollment-links'
@@ -156,20 +157,22 @@ export const reconnectPersonalOrganizationAccount = defineAuthorizedCredentialUs
         completionId: input.oauthCompletionId,
         returnTo: 'integrations' as const,
       }
-      if (account.type === 'managed_oauth' && account.optionId) {
-        return startViewerCredentialGroupOAuth({
-          ...connection,
-          optionId: account.optionId,
-          connectionIntent: { kind: 'reconnect', credentialId: account.credentialId },
-        })
-      }
-      if (account.type === 'managed_mcp' && account.mcpServerId) {
-        return startViewerCredentialGroupMcpOAuth({
-          ...connection,
-          mcpServerId: account.mcpServerId,
-        })
-      }
-      throw new OrchestrationError('not_found', 'This account provider is no longer available')
+      return runWithOutboundOrganization(account.organizationId, () => {
+        if (account.type === 'managed_oauth' && account.optionId) {
+          return startViewerCredentialGroupOAuth({
+            ...connection,
+            optionId: account.optionId,
+            connectionIntent: { kind: 'reconnect', credentialId: account.credentialId },
+          })
+        }
+        if (account.type === 'managed_mcp' && account.mcpServerId) {
+          return startViewerCredentialGroupMcpOAuth({
+            ...connection,
+            mcpServerId: account.mcpServerId,
+          })
+        }
+        throw new OrchestrationError('not_found', 'This account provider is no longer available')
+      })
     }
     const { invitationLink } = await createViewerCredentialGroupEnrollment({
       organizationId: account.organizationId,