[MCP] Add support for MCP Oauth credentials #4517
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requested review from
bolinfest,
pkomlev,
easong-openai and
dylan-hurd-oai
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| .context("failed to load configuration")?; | ||
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| if !config.use_experimental_use_rmcp_client { | ||
| bail!( |
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What does the user seem when bail!() is used? Is it an ugly scary message with something like a stacktrace or fairly human-readable?
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Nope! It's a normal stdout/err line
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| impl PartialEq for WrappedOAuthTokenResponse { | ||
| fn eq(&self, other: &Self) -> bool { | ||
| match (serde_json::to_string(self), serde_json::to_string(other)) { |
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No because we don't control the original type and it's in another crate. Let me know if there is a way to do that though but I'm not aware of one.
This PR adds oauth login support to streamable http servers when
experimental_use_rmcp_clientis enabled.This PR is large but represents the minimal amount of work required for this to work. To keep this PR smaller, login can only be done with
codex mcp loginandcodex mcp logoutbut it doesn't appear in/mcporcodex mcp listyet. Fingers crossed that this is the last large MCP PR and that subsequent PRs can be smaller.Under the hood, credentials are stored using platform credential managers using the keyring crate. When the keyring isn't available, it falls back to storing credentials in
CODEX_HOME/.credentials.jsonwhich is consistent with how other coding agents handle authentication.I tested this on macOS, Windows, WSL (ubuntu), and Linux. I wasn't able to test the dbus store on linux but did verify that the fallback works.
One quirk is that if you have credentials, during development, every build will have its own ad-hoc binary so the keyring won't recognize the reader as being the same as the write so it may ask for the user's password. I may add an override to disable this or allow users/enterprises to opt-out of the keyring storage if it causes issues.