Kuberwastaken/claurst · error · anyhow::Error

refresh: request failed

Error message

refresh: request failed: {}

What it means

The HTTP POST for the refresh_token grant failed at the transport level — connection error, DNS failure, TLS problem, or timeout while contacting the token endpoint. No HTTP response was received; the network request itself failed.

Solutions

1. Check connectivity to the token endpoint host
2. Inspect proxy/TLS settings for the authorization server
3. Retry once the network issue is resolved

When it happens

Trigger: Thrown at src-rust/crates/mcp/src/oauth.rs:539 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Kuberwastaken/claurst@b0637c97ec (2026-09-10). Data as JSON: /api/errors/f027d3e2209244e7. Report an issue: GitHub.

Appendix: source

Thrown at src-rust/crates/mcp/src/oauth.rs:539

/// Refresh an existing MCP token using the stored refresh token.
pub async fn refresh_mcp_token(server_name: &str, token_endpoint: &str) -> anyhow::Result<McpToken> {
    let existing = get_mcp_token(server_name)
        .ok_or_else(|| anyhow::anyhow!("No stored token for {}", server_name))?;
    let refresh = existing
        .refresh_token
        .as_deref()
        .ok_or_else(|| anyhow::anyhow!("Token for {} has no refresh token", server_name))?
        .to_string();

    let client = reqwest::Client::new();
    let params = [("grant_type", "refresh_token"), ("refresh_token", refresh.as_str())];

    let resp = client
        .post(token_endpoint)
        .form(&params)
        .send()
        .await
        .map_err(|e| anyhow::anyhow!("refresh: request failed: {}", e))?;

    if !resp.status().is_success() {
        let status = resp.status();
        let body = resp.text().await.unwrap_or_default();
        anyhow::bail!("refresh: HTTP {} — {}", status, body);
    }

    #[derive(serde::Deserialize)]
    struct TokenResponse {
        access_token: String,
        refresh_token: Option<String>,
        expires_in: Option<u64>,
    }

    let tr: TokenResponse = resp.json().await?;
    let expires_at = tr.expires_in.map(|s| {
        std::time::SystemTime::now()
            .duration_since(std::time::UNIX_EPOCH)

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