RFC 8693
The OAuth 2.0 standard specification for token exchange, allowing one party to obtain, through an authorization server, a new token with an explicitly constrained subject, scope, and validity period for verifiable delegated authorization.
Core Facts
Timeline (last 90 days)
OAuth's Token Exchange specification (RFC 8693) allows tokens to change audience and permissions as they are passed along, but it does not yet support verification of delegation chains of arbitrary depth.
Practical lessons for building multi-agent systems include: cross-agent action triggers should be bound to explicit authorization credentials rather than relying on confirmation words in dialogue; authorization credentials need to contain the three elements of subject, scope and validity, and support independent verification by the recipient; delegation chains should be traceable; and a token exchange process similar to RFC 8693 can be introduced at the protocol level.
Under the RFC 8693 framework, if Agent B wants to perform operations on behalf of Agent A, it needs to request a token exchange from the authorization server and obtain a new token explicitly marked as representing A, with a permission scope of X and a validity period of Y, and the receiving Agent C can inspect this token to confirm that the delegation chain is complete and the permissions do not exceed bounds.
RFC 8693 Token Exchange is an OAuth 2.0 extension defined by the IETF for exchanging tokens between trusted identity providers, allowing one principal to call downstream services as another principal (or a downgraded role) without exposing the original credentials.
OAuth 2.0 provides mechanisms such as authorization code, PKCE, and Token Exchange (RFC 8693) to express that user A authorizes application B to access resource C on their behalf.
RFC 8693 Token Exchange provides some token exchange capabilities, but is not yet sufficient to natively express complex multi-level delegation semantics.
The Token Exchange specification in the OAuth 2.0 framework (RFC 8693) allows an authenticated principal to delegate a portion of its permissions to another entity while retaining authorization chain provenance information.
There are two mainstream patterns for propagating original authorization information in multi-hop call chains: token passthrough and exchanging for a new token via OAuth 2.0 Token Exchange (RFC 8693).
ID-JAG is typically built on top of OAuth 2.0 Token Exchange (RFC 8693).
OAuth 2.0 Token Exchange, defined by RFC 8693, allows platform services to exchange a user token for a new token with a more restricted scope targeting specific downstream resources.
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All Facts (11)
OAuth 2.0 Token Exchange (RFC 8693) defines a token exchange mechanism that allows a service to exchange a token it already holds for a new token applicable to downstream services.
75%UnverifiedOAuth's Token Exchange specification (RFC 8693) allows tokens to change audience and permissions as they are passed along, but it does not yet support verification of delegation chains of arbitrary depth.
50%UnverifiedUnder the RFC 8693 framework, if Agent B wants to perform operations on behalf of Agent A, it needs to request a token exchange from the authorization server and obtain a new token explicitly marked as representing A, with a permission scope of X and a validity period of Y, and the receiving Agent C can inspect this token to confirm that the delegation chain is complete and the permissions do not exceed bounds.
50%UnverifiedPractical lessons for building multi-agent systems include: cross-agent action triggers should be bound to explicit authorization credentials rather than relying on confirmation words in dialogue; authorization credentials need to contain the three elements of subject, scope and validity, and support independent verification by the recipient; delegation chains should be traceable; and a token exchange process similar to RFC 8693 can be introduced at the protocol level.
50%UnverifiedRFC 8693 Token Exchange is an OAuth 2.0 extension defined by the IETF for exchanging tokens between trusted identity providers, allowing one principal to call downstream services as another principal (or a downgraded role) without exposing the original credentials.
50%UnverifiedOAuth 2.0 provides mechanisms such as authorization code, PKCE, and Token Exchange (RFC 8693) to express that user A authorizes application B to access resource C on their behalf.
50%UnverifiedRFC 8693 Token Exchange provides some token exchange capabilities, but is not yet sufficient to natively express complex multi-level delegation semantics.
50%UnverifiedThe Token Exchange specification in the OAuth 2.0 framework (RFC 8693) allows an authenticated principal to delegate a portion of its permissions to another entity while retaining authorization chain provenance information.
50%UnverifiedThere are two mainstream patterns for propagating original authorization information in multi-hop call chains: token passthrough and exchanging for a new token via OAuth 2.0 Token Exchange (RFC 8693).
50%UnverifiedID-JAG is typically built on top of OAuth 2.0 Token Exchange (RFC 8693).
50%UnverifiedOAuth 2.0 Token Exchange, defined by RFC 8693, allows platform services to exchange a user token for a new token with a more restricted scope targeting specific downstream resources.
50%