MCP with oauth doesn't work

Description

Configured MCP like this inside my project:

"mcp": {
  "jira": {
    "type": "remote",
    "url": "https://mcp.atlassian.com/v1/sse"
  }
},

opencode mcp auth jira shows:

opencode mcp auth jira

┌  MCP OAuth Authentication
│
▲  No OAuth-enabled MCP servers configured
│
●  Add OAuth config to a remote MCP server in opencode.json:
│
●
│    "mcp": {
│      "my-server": {
│        "type": "remote",
│        "url": "https://example.com/mcp",
│        "oauth": {
│          "scope": "tools:read"
│        }
│      }
│    }
│
└  Done

I thought it may also help to try to invoke the tools and then the Oauth process will start but the agent doesn't know the tools.

OpenCode version

1.0.150

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

macOS 26.1

Terminal

iTerm 2

This issue might be a duplicate of existing issues. Please check:

[FEATURE]: Allow to enable MCP on a per-agent basis #5373: [FEATURE]: Allow to enable MCP on a per-agent basis (related MCP configuration challenges)
[FEATURE]: Support MCP servers that require POST-based or non-standard SSE handshake #5371: [FEATURE]: Support MCP servers that require POST-based or non-standard SSE handshake (related MCP server compatibility)
Remote MCPs with auth header broke in latest update #5328: Remote MCPs with auth header broke in latest update (related to MCP authentication in recent versions)
{env:...} variable substitution inconsistently fails for specific MCP server URLs #5299: {env:...} variable substitution inconsistently fails for specific MCP server URLs (related to MCP configuration and environment variables)

Feel free to ignore if none of these address your specific case.

fix: MCP OAuth auth commands now recognize remote servers as OAuth-en…

I got the same issue (opencode mcp auth atlassian failed with the same message about No Oauth-enabled MCP servers configured), but when I set up opencode.json to use the local proxy instead, I was able to use Atlassian MCP. Not a solution, but hopefully a workaround that could help.

{
	"$schema": "https://opencode.ai/config.json",
	"mcp": {
		"atlassian": {
			"type": "local",
			"command": ["npx", "-y", "mcp-remote", "https://mcp.atlassian.com/v1/sse"]
		}
	}
}

I got a similar issue in trying to connect the linear remote mcp server.

I had to add this "oauth": {} to the config, and then when I ran opencode mcp auth linear it properly kicked off the auth flow.

{
    "$schema": "https://opencode.ai/config.json",
    "mcp": {
        "linear": {
            "type": "remote",
            "url": "https://mcp.linear.app/mcp",
            "enabled": true,
           "oauth": {}
        }
    }
}

thank you. adding "oauth": {} actually fixed it.

For me what worked was changing the http://127.0.0.1 url (on the page that failed) to http://localhost. :/

fyi. sometimes i have to explicitly logout and log back in to reauthenticate

opencode mcp logout atlassian
opencode mcp auth atlassian

For me what worked was changing the http://127.0.0.1 url (on the page that failed) to http://localhost. :/

This worked for me as well for linear ... I assumed it was a WSL'ism.

For me what worked was changing the http://127.0.0.1 url (on the page that failed) to http://localhost. :/

This doesn't work for me. Here's what I did on Firefox:

When the OAuth web page is stuck at "waiting for 127.0.0.1", open developer panel.
Go to network, find the GET request, double click.
It loads the request into URL bar. The URL looks something like http://127.0.0.1:19876/mcp/oauth/callback?code=xxx&state=xxx
Changing 127.0.0.1 to localhost, and hit enter

This didn't work.

solved my issue

For me what worked was changing the http://127.0.0.1 url (on the page that failed) to http://localhost. :/

This worked for me as well for linear ... I assumed it was a WSL'ism.

This worked for me in my WSL environment setup

this doesn't work for me.

Bug Report: Linear MCP Authentication Fails Despite Valid Credentials

Environment

OpenCode Version: 1.0.150 (matching GitHub issue MCP with oauth doesn't work #5444)
Platform: macOS (Darwin)
Date: 2026-05-29

Problem Summary

The linear MCP server shows as "connected" in opencode mcp list, but all tool invocations fail with invalid_token — even immediately after successful OAuth authentication.

Configuration Used

{
  "mcp": {
    "linear": {
      "type": "remote",
      "url": "https://mcp.linear.app/mcp",
      "enabled": true,
      "oauth": {}
    }
  }
}

Steps to Reproduce

Configure Linear MCP in ~/.config/opencode/opencode.json with "oauth": {}
Run opencode mcp auth linear and complete OAuth flow successfully
Restart OpenCode to pick up config changes
Verify connection: opencode mcp list shows ✓ linear connected
Attempt to invoke any Linear MCP tool (e.g., linear_get_issue)

Expected Behavior

MCP tool should execute successfully using the authenticated OAuth token.

Actual Behavior

Failed to connect to MCP server "linear".
URL: https://mcp.linear.app/mcp
Reason: Streamable HTTP error: Error POSTing to endpoint: 
{"error":"invalid_token","error_description":"Missing or invalid access token"}

Debug Output (`opencode mcp debug linear`)

●  Auth status: ✓ authenticated
●    Access token: 22dadc00-c1d4-4da0-b...
●    Expires: 2026-05-30T05:46:06.390Z 
●    Refresh token: present
●    Client ID: J9BKiZgklNri5DVI
◇  HTTP response: 401 Unauthorized
●  WWW-Authenticate: Bearer realm="OAuth", resource_metadata="https://mcp.linear.app/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"
▲  Server returned 401 Unauthorized

Key Observations

Token IS obtained: debug shows valid access token and refresh token present
Auth flow succeeds: opencode mcp auth linear confirms "already has valid credentials"
Connection check passes: mcp list shows ✓ linear connected
HTTP test fails: The debug HTTP probe gets 401 Unauthorized from Linear's server
Native tools work fine: linear_get_issue (non-MCP) successfully fetches issue ACENOTE-1443
Tool execution fails: Only the actual tool invocation hits the auth error

Root Cause Analysis

The OAuth token acquisition works correctly (token is present, not expired, refresh token available), but OpenCode's MCP client is not properly attaching the token to HTTP requests when invoking tools. The 401 Unauthorized + WWW-Authenticate: Bearer response from Linear's server indicates the Authorization header is either:

Missing entirely from tool invocation requests
Malformed (wrong prefix, encoding, or format)
Not being sent through the Streamable HTTP transport layer

Closing because the original report is fixed: remote MCP OAuth is now enabled by default unless oauth: false, so an explicit oauth: {} block is no longer required. This thread has since accumulated unrelated callback, WSL, and Linear token symptoms. Please open a focused current-version issue for any remaining provider-specific failure; note that mcp debug intentionally performs an unauthenticated probe, so its 401 alone does not show that tool requests omit the OAuth token.

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MCP with oauth doesn't work #5444

Description

OpenCode version

Steps to reproduce

Screenshot and/or share link

Operating System

Terminal

Bug Report: Linear MCP Authentication Fails Despite Valid Credentials

Environment

Problem Summary

Configuration Used

Steps to Reproduce

Expected Behavior

Actual Behavior

Debug Output (`opencode mcp debug linear`)

Key Observations

Root Cause Analysis

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MCP with oauth doesn't work #5444

Description

Description

OpenCode version

Steps to reproduce

Screenshot and/or share link

Operating System

Terminal

Activity

github-actions commented on Dec 12, 2025

jmhill commented on Dec 19, 2025

daraghscopey commented on Dec 19, 2025

klaudworks commented on Dec 19, 2025

tedmahsun commented on Feb 1, 2026

seannetlife commented on Feb 11, 2026

snarkipus commented on Mar 8, 2026

sghng commented on Mar 11, 2026

chendeshen commented on Mar 28, 2026

gurvancampion commented on Apr 23, 2026

windseason commented on May 29, 2026

Bug Report: Linear MCP Authentication Fails Despite Valid Credentials

Environment

Problem Summary

Configuration Used

Steps to Reproduce

Expected Behavior

Actual Behavior

Debug Output (opencode mcp debug linear)

Key Observations

Root Cause Analysis

rekram1-node commented on Jun 24, 2026

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Debug Output (`opencode mcp debug linear`)