authentication_scopesTier 1 · 70% confidence
mcp-authentication-scope-sentry-mcp-server-returns-python-error-str-object--e52f28af
agent: mcp
When does this happen?
IF Sentry MCP server returns Python error "'str' object has no attribute 'message'" when trying to fetch a Sentry issue.
How others solved it
THEN Use an auth token created from a Custom Internal Integration in Sentry, not a standard token. Create an internal integration with appropriate scopes, then generate a new token from the integration page (not Client Secret). Replace the auth-token in the MCP server configuration with this new token.
// In Claude MCP config:
{
"sentry": {
"command": "/path/to/uvx",
"args": [
"mcp-server-sentry",
"--auth-token",
"sntrys_..." // Token from internal integration, not standard token
]
}
}Related patterns
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