Atlassian(Rovo) MCP Server cannot auth properly for individual users

[happytreees]

What happened?

When attempting to use the Atlassian(Rovo) MCP server we are never able to authenticate, or store the oauth tokens.

After approving the oauth, and accepting via Atlassian I am redirected back to Libre and a message stating the authentication has failed.

Version Information

v0.8.3

Steps to Reproduce

Attempt to setup Atlassian MCP server in Libre

What browsers are you seeing the problem on?

No response

Relevant log output

2026-03-11 19:23:38 info: [MCP][User: 12345][atlassian] Establishing new connection
2026-03-11 19:23:38 info: [MCP][User: 12345][atlassian] Access token missing
2026-03-11 19:23:38 info: [MCP][User: 12345][atlassian] Access token missing and no refresh token available
2026-03-11 19:23:38 info: [MCP][User: 12345][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp
2026-03-11 19:23:38 warn: [MCP][User: 12345][atlassian] OAuth authentication error detected
2026-03-11 19:23:38 error: [MCP][User: 12345][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (401)
2026-03-11 19:23:38 warn: [MCP][User: 12345][atlassian] OAuth authentication required
2026-03-11 19:23:38 info: [MCP][atlassian][12345] oauthRequired event received
2026-03-11 19:23:39 warn: [MCPOAuth] Resource metadata missing 'resource' property for atlassian. This can cause issues with some Authorization Servers who expect a "resource" parameter.
2026-03-11 19:23:39 info: [MCP][atlassian][12345] OAuth flow started, issuing authorization URL
2026-03-11 19:23:39 info: [MCP Reinitialize] OAuth URL received for atlassian
2026-03-11 19:23:39 error: [MCP][User: 12345][atlassian] OAuth handling failed: OAuth flow initiated - return early
2026-03-11 19:23:39 error: [MCP][User: 12345][atlassian] Connection failed: SSE error: Non-200 status code (401)
2026-03-11 19:23:39 info: [MCP][atlassian][12345] OAuth required, stopping connection attempts
2026-03-11 19:23:39 error: [MCP][User: 12345][atlassian] Failed to establish connection SSE error: Non-200 status code (401)
2026-03-11 19:23:39 info: [MCP Reinitialize] getConnection threw error: SSE error: Non-200 status code (401)
2026-03-11 19:23:39 info: [MCP Reinitialize] OAuth state - oauthRequired: true, oauthUrl: present
2026-03-11 19:23:39 info: [MCP Reinitialize] OAuth required for atlassian, attempting tool discovery without auth
2026-03-11 19:23:41 info: [MCP][User: 12345][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp
2026-03-11 19:23:41 warn: [MCP][User: 12345][atlassian] OAuth authentication error detected
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (401)
2026-03-11 19:23:41 warn: [MCP][User: 12345][atlassian] OAuth authentication required
2026-03-11 19:23:41 info: [MCP][atlassian][12345] [Discovery] OAuth required; skipping URL generation in discovery mode
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] OAuth handling failed: OAuth required during tool discovery
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] Connection failed: SSE error: Non-200 status code (401)
2026-03-11 19:23:41 info: [MCP][User: 12345][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp
2026-03-11 19:23:41 warn: [MCP][User: 12345][atlassian] OAuth authentication error detected
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (401)
2026-03-11 19:23:41 warn: [MCP][User: 12345][atlassian] OAuth authentication required
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] OAuth handling failed: OAuth not supported in unauthenticated discovery
2026-03-11 19:23:41 error: [MCP][User: 12345][atlassian] Connection failed: SSE error: Non-200 status code (401)
2026-03-11 19:23:41 info: [MCP][User: 12345][atlassian] SSE transport closed

Screenshots

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[danny-avila]

Thanks for providing the info. Will be trying to reproduce.

[danny-avila]

---

Not having any issues when adding this MCP server from the UI.

Note, I did fix issues with MCP OAuth yesterday that may or may not be affecting. Please try on the latest image release:

https://github.com/users/danny-avila/packages/container/package/librechat-dev

[happytreees]

@danny-avila thank you for the response! I changed out the image to ghcr.io/danny-avila/librechat-dev:9a5d7eaa4ef1dbae21d06ea82e587c54e867b48b and am seeing the following:

[atlassian] Failed to store tokens Invalid key length
2026-03-11 22:44:30 error: [MCP OAuth] Failed to store OAuth tokens after callback Invalid key length
2026-03-11 22:44:30 error: [MCP OAuth] OAuth callback error Invalid key length
2026-03-11 22:44:30 error: Error in OAuth authentication: Unknown OAuth error

Can you share the configuration you are using? It's possible that I might be missing something.

[danny-avila]

The Invalid key length error means your CREDS_KEY environment variable is either missing, empty, or the wrong length. This isn't related to the OAuth flow itself, the Atlassian handshake actually succeeded, but token storage failed because it couldn't encrypt them.

CREDS_KEY must be a valid 32-character hex string (for AES-256, 64 hex characters). You can generate one with:

openssl rand -hex 16

Same for CREDS_IV:

openssl rand -hex 8

Please double-check both values in your .env / Docker environment config and restart.

[stenebenau]

I have the same issue;

2026-03-16T12:46:07.351630493Z stdout F 2026-03-16T12:46:07.351Z info: [MCP][atlassian][6806527c82a29958f4952066] Loaded OAuth tokens 2026-03-16T12:46:07.35285546Z stdout F 2026-03-16T12:46:07.352Z info: [MCP][User: 6806527c82a29958f4952066][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp 2026-03-16T12:46:07.506891073Z stdout F 2026-03-16T12:46:07.506Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (400) 2026-03-16T12:46:07.507408048Z stdout F 2026-03-16T12:46:07.507Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Connection failed: SSE error: Non-200 status code (400) 2026-03-16T12:46:09.509009404Z stdout F 2026-03-16T12:46:09.508Z info: [MCP][User: 6806527c82a29958f4952066][atlassian] SSE transport closed 2026-03-16T12:46:09.509866931Z stdout F 2026-03-16T12:46:09.509Z info: [MCP][User: 6806527c82a29958f4952066][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp 2026-03-16T12:46:09.631071147Z stdout F 2026-03-16T12:46:09.630Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (400) 2026-03-16T12:46:09.631256987Z stdout F 2026-03-16T12:46:09.631Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Connection failed: SSE error: Non-200 status code (400) 2026-03-16T12:46:13.631997675Z stdout F 2026-03-16T12:46:13.631Z info: [MCP][User: 6806527c82a29958f4952066][atlassian] SSE transport closed 2026-03-16T12:46:13.633182394Z stdout F 2026-03-16T12:46:13.633Z info: [MCP][User: 6806527c82a29958f4952066][atlassian] Creating SSE transport: https://mcp.atlassian.com/v1/mcp 2026-03-16T12:46:13.747380181Z stdout F 2026-03-16T12:46:13.747Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Transport error (may require manual intervention): SSE error: Non-200 status code (400) 2026-03-16T12:46:13.747578738Z stdout F 2026-03-16T12:46:13.747Z warn: [MCP][User: 6806527c82a29958f4952066][atlassian] Circuit breaker: too many failures, backing off for 30000ms 2026-03-16T12:46:13.747771458Z stdout F 2026-03-16T12:46:13.747Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Connection failed: SSE error: Non-200 status code (400) 2026-03-16T12:46:13.747977737Z stdout F 2026-03-16T12:46:13.747Z error: [MCP][atlassian][6806527c82a29958f4952066] Failed to connect after 3 attempts SSE error: Non-200 status code (400) 2026-03-16T12:46:13.748271232Z stdout F 2026-03-16T12:46:13.748Z error: [MCP][User: 6806527c82a29958f4952066][atlassian] Failed to establish connection SSE error: Non-200 status code (400) 2026-03-16T12:46:13.748465257Z stdout F 2026-03-16T12:46:13.748Z debug: [MCP][User: 6806527c82a29958f4952066][atlassian] Removed connection entry. 2026-03-16T12:46:13.748657231Z stdout F 2026-03-16T12:46:13.748Z info: [MCP Reinitialize] getConnection threw error: SSE error: Non-200 status code (400) 2026-03-16T12:46:13.748781356Z stdout F 2026-03-16T12:46:13.748Z info: [MCP Reinitialize] OAuth state - oauthRequired: false, oauthUrl: null 2026-03-16T12:46:13.748948059Z stdout F 2026-03-16T12:46:13.748Z error: [MCP Reinitialize] Error initializing MCP server atlassian for user: SSE error: Non-200 status code (400) 2026-03-16T12:46:13.749047631Z stdout F 2026-03-16T12:46:13.748Z debug: [MCP Reinitialize] Sending response for atlassian - oauthRequired: false, oauthUrl: null 2026-03-16T12:46:13.749370244Z stdout F 2026-03-16T12:46:13.749Z debug: [MCP Reinitialize] Response for atlassian: 2026-03-16T12:46:13.749377567Z stdout F { 2026-03-16T12:46:13.749380648Z stdout F success: false, 2026-03-16T12:46:13.749382834Z stdout F oauthRequired: false, 2026-03-16T12:46:13.749385501Z stdout F oauthUrl: null, 2026-03-16T12:46:13.749388128Z stdout F toolsCount: 0, 2026-03-16T12:46:13.749391074Z stdout F }

i'm running https://ghcr.io/danny-avila/librechat-dev:latest

[danny-avila]

No config shared, that would be helpful for troubleshooting.

atlassian is working for me with a simple config

mcpServers:
  atlassian:
    type: streamable-http
    initTimeout: 1000
    timeout: 60000
    url: "https://mcp.atlassian.com/v1/mcp"

Make sure you're on the latest version of librechat.

[stenebenau]

I have this;

atlassian: url: https://mcp.atlassian.com/v1/mcp timeout: 60000 # 1 minute timeout for this server, this is the default timeout for MCP servers. requiresOAuth: true serverInstructions: true # Use server-provided instructions

Will try yours.

[stenebenau]

Yours works. Thanks!