Okta Agent SSO for MCP Enterprise-Managed Authorization

Quick answer

Okta describes Cross App Access as the official Enterprise-Managed Authorization extension for MCP. For supported connections, XAA can register the agent, centralize policy, and replace a standing broadly shared credential with short-lived access bound to an agent, delegated identity, resource, and scopes.

This improves the identity layer. It does not validate model reasoning, make every MCP server trustworthy, or approve each tool call.

Control chain

user, machine, or upstream agent
  -> registered agent identity
  -> Okta delegation and resource connection
  -> XAA token exchange and policy
  -> scoped token for one MCP resource
  -> MCP server token validation
  -> allowed tool and arguments
  -> runtime confirmation and business rule
  -> action, audit, result review, and recovery

Preserve the identities and decision at every step. Do not collapse a valid token into unrestricted tool authority.

Identity policy versus tool policy

Layer	Controls	Common mistake
Okta agent identity	Which non-human principal is connecting	Reusing one agent identity across unrelated deployments
Delegation	Which user, app, or agent may authorize it	Losing the original user or service identity
Resource connection	Which MCP server or application is reachable	Treating one connection as access to every server
Token scope	Technical permission at the resource	Using one broad scope for read, write, delete, and admin tools
MCP server	Tool exposure, schema, and per-call enforcement	Checking token validity but ignoring tool and argument scope
Agent runtime	Prompt, model, confirmation, limits, destinations	Letting model intent substitute for authorization
Business system	Transaction rules, ownership, reversal	Assuming a permitted API call is an approved business event

Server acceptance checklist

The MCP server should validate issuer, signature, audience, expiry, scopes, delegated subject, and agent identity. It should reject tokens from another tenant, environment, resource, or flow.

Map scopes to tools and sensitive arguments. A read scope should not authorize update, delete, export, public share, payment, invitation, or permission changes. Where one tool has multiple effects, add business-policy checks and explicit confirmation.

Return bounded errors without leaking tokens, secrets, hidden resources, policy internals, or sensitive data. Preserve a request identifier so Okta, MCP server, agent runtime, and business logs can be reconciled.

Runtime boundary

An XAA-managed MCP connection can still be used by a compromised or poorly instructed agent. Bound the model, system instructions, prompt sources, tool list, maximum calls, concurrency, spend, data volume, destinations, and session duration.

Reauthorize when the user, task, resource, scope, tool set, data class, destination, or risk changes. A token minted for one task should not become silent standing authority for future autonomous sessions.

Revocation and recovery test

1. Disable the agent identity and verify new token exchange fails.
2. Remove the user’s delegation and resource connection independently.
3. Reduce a scope and confirm the server rejects the former write path.
4. Rotate agent authentication and invalidate the old credential.
5. Revoke during an active session and test cached-token expiry behavior.
6. Reverse one permitted business action and preserve the audit chain.
7. Treat any external side effect that cannot be reversed as a separate high-risk approval.

Use the Okta Agent SSO readiness check to capture the complete rollout evidence.

Frequently asked questions

What does XAA add to MCP authorization?

Okta describes XAA as MCP’s Enterprise-Managed Authorization extension, moving supported agent-to-server access decisions into an enterprise identity policy and short-lived token path.

Does MCP Enterprise-Managed Authorization decide which tool is safe to call?

No. Identity and token scope are one layer. The MCP server and agent runtime must still enforce tool schemas, data purpose, arguments, confirmations, rate and spend limits, and recovery.

Can an MCP server use a broad access token for every tool?

Avoid that design. Define resource audiences and scopes that match bounded operations, then enforce them at the server for each tool and sensitive argument.

Does centralized policy remove the need for user delegation?

No. Decide whether the agent acts for a user, a machine, or another agent, preserve that identity chain, and require consent or approval where the resource flow and business action require it.

Official sources

• Okta: Cross App Access extends MCP
• Okta: Agent SSO general availability
• Okta Developer: AI agent token exchange

Source check: August 27, 2026. Recheck MCP specification support, SDKs, XAA integration, token validation, identity claims, delegation, resource types, scopes, audit, and revocation.