fix(issuer): add token_type to authorization code flow token responses #318
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Add token_type: 'Bearer' to token endpoint responses for both authorization_code and refresh_token grant types to comply with RFC 6749 Section 5.1. - Add token_type to authorization_code grant response (line 883) - Add token_type to refresh_token grant response (line 951) - Update tests to verify token_type is present in refresh token responses Per RFC 6749 Section 5.1 (https://tools.ietf.org/html/rfc6749#section-5.1): "The authorization server MUST include the token_type parameter in the response."
swalker326
approved these changes
Dec 19, 2025
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Add
token_type: 'Bearer'to token endpoint responses for both authorization_code and refresh_token grant types to comply with RFC 6749 Section 5.1.Changes
token_type: "Bearer"to authorization_code grant response (line 883)token_type: "Bearer"to refresh_token grant response (line 951)token_typeis present in refresh token responsesRFC Compliance
Per RFC 6749 Section 5.1 (https://tools.ietf.org/html/rfc6749#section-5.1):
This ensures compatibility with OAuth 2.0 clients that require the
token_typeparameter, such as MCP clients using@mastra/mcp.Related: PR #304 fixes the same issue for the implicit flow (response_type="token"). This PR addresses the authorization code flow.