Delegated Integration

A connection where one system acts on behalf of a user or service through tokens, API keys, or OAuth grants. In AI environments, these integrations deserve lifecycle control because they can move data and privileges far beyond the original approval boundary.

Expanded Definition

Delegated integration is a permissioned connection where one application, service, or agent acts on behalf of another identity by using issued tokens, API keys, or OAuth grants. In practice, the delegation boundary is the critical point: the original user or service may approve a narrow action, but the integration can continue to exchange data, call downstream APIs, or trigger workflows until the credential is revoked or expires. In identity and AI-heavy environments, this makes delegated integration a governance issue as much as a technical one, because the delegated party may be an NIST Cybersecurity Framework 2.0 asset, a Non-Human Identity, or an agent with execution authority.

Definitions vary across vendors on whether delegated integration includes only user-consented access or also machine-to-machine service trust. NHI Management Group treats it as the broader pattern of authorized third-party action under inherited privileges, which is why lifecycle controls matter from issuance through revocation. The most common misapplication is treating delegated access as a one-time onboarding event, which occurs when teams fail to monitor what the integration can still do after the original approval changes.

Examples and Use Cases

Implementing delegated integration rigorously often introduces review and revocation overhead, requiring organisations to weigh workflow convenience against the risk of hidden privilege persistence.

• A finance app uses an OAuth grant to sync invoices from a cloud ERP on behalf of a user, but the grant later survives the user’s role change.
• An AI agent uses a delegated API key to pull customer records for summarisation, which is acceptable only if the key is scoped to read-only access and rotated on a schedule.
• A helpdesk platform connects to a ticketing system through a service token to update incidents automatically, creating an NHI that must be inventoried and monitored.
• A collaboration tool invokes a storage API on behalf of a tenant administrator, but the delegated path also permits bulk export unless scope constraints are enforced.
• A workflow automation platform chains multiple delegated calls across SaaS apps, so a single compromised grant can expand into a cross-system trust issue.

For identity-centred implementations, OWASP Non-Human Identity Top 10 is useful because it frames delegated service credentials as identities that need discovery, ownership, and lifecycle control.

Why It Matters for Security Teams

Delegated integration is a security boundary, not just an integration method. When teams do not track who approved it, what scopes were granted, and whether those scopes still match the business need, the result is over-permissioned automation that can exfiltrate data or change records without obvious user interaction. That is especially important for AI workflows, where delegated access may allow an agent to read, transform, and transmit information far beyond the original task. Security teams need clear ownership, time-bound grants, scope minimisation, and revocation paths that are tested rather than assumed.

Governance also matters because delegated connections frequently bypass ordinary access review processes once they are embedded in software. The NIST Cybersecurity Framework 2.0 places this type of control within broader identity, access, and risk management disciplines, while OWASP Non-Human Identity Top 10 helps teams treat the delegated connection itself as an identity with responsibilities and failure modes. Organisations typically encounter the true blast radius only after a compromised token, stale grant, or rogue automation has already been used, at which point delegated integration becomes operationally unavoidable to investigate and contain.

Related resources from NHI Mgmt Group

• How should security teams think about a compromised integration like Drift?
• When does an OAuth integration become too risky to keep?
• When does a third-party integration become a security liability?
• When should teams revoke a third-party SaaS integration?