Where is MCP config stored in agent-canvas? My slack MCP randomly lost auth

Uh oh! There was an unexpected error starting the job :(

@nutritious-balloon-65098 dyk? 🫠

I'm on it! can track my progress here.

Hah, I forgot to select a repo, so the session “expired” waiting for me. 🤔

I answered the question by cloning and inspecting `openhands/agent-canvas`; I did not make code changes. Final answer restated: MCP config/auth in

agent-canvas

is stored in user settings under:

agent_settings.mcp_config

For Slack, the relevant saved shape is under something like:

agent_settings.mcp_config.mcpServers.slack.env.SLACK_BOT_TOKEN
agent_settings.mcp_config.mcpServers.slack.env.SLACK_TEAM_ID

Persistence paths found: • Local agent-server:

GET /api/settings

and

PATCH /api/settings

• Cloud:

GET /api/v1/settings

and

POST /api/v1/settings

• UI reads from

settings.agent_settings.mcp_config

• MCP add/update/delete writes via

agent_settings_diff: { mcp_config: ... }

Likely cause of “randomly lost auth”: • MCP saves use a two-step replace: first clear

mcp_config

to

null

, then write the new config. If the second write fails after the clear, the config/auth can be left empty. • Another possible issue is redacted secrets: if the UI receives

SLACK_BOT_TOKEN

as

"**********"

and then round-trips that through an MCP edit/add/delete flow, it may overwrite the real token with the redacted placeholder. No files were modified or committed.

Ahh! Robert, didn’t you have a PR to solve this at some point…?

I'm on it! can continue tracking my progress here.