router-for-me/CLIProxyAPI · error

failed to marshal request body: %w

Error message

failed to marshal request body: %w

What it means

Error "failed to marshal request body: %w" thrown in router-for-me/CLIProxyAPI.

Source

Thrown at internal/auth/claude/anthropic_auth.go:395

	// order Claude Code 2.1.220 emits on the wire; a map would be re-sorted
	// alphabetically by encoding/json and change the serialized body bytes.
	reqBody := authorizationCodeExchangeRequest{
		GrantType:    "authorization_code",
		Code:         newCode,
		RedirectURI:  RedirectURI,
		ClientID:     ClientID,
		CodeVerifier: pkceCodes.CodeVerifier,
		State:        state,
	}

	// A state fragment appended to the callback code takes precedence.
	if newState != "" {
		reqBody.State = newState
	}

	jsonBody, err := json.Marshal(reqBody)
	if err != nil {
		return nil, fmt.Errorf("failed to marshal request body: %w", err)
	}

	// log.Debugf("Token exchange request: %s", string(jsonBody))

	req, err := http.NewRequestWithContext(ctx, "POST", TokenURL, strings.NewReader(string(jsonBody)))
	if err != nil {
		return nil, fmt.Errorf("failed to create token request: %w", err)
	}
	applyClaudeOAuthAxiosHeaders(req)

	resp, err := o.httpClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("token exchange request failed: %w", err)
	}
	defer func() {
		if errClose := resp.Body.Close(); errClose != nil {
			log.Errorf("failed to close response body: %v", errClose)
		}

View on GitHub (pinned to 78f0c4079e)

Solutions

1. Check the wrapped marshal error for unsupported values in the request body struct.
2. Verify the token request fields are populated with serializable values.

When it happens

Trigger: Thrown at internal/auth/claude/anthropic_auth.go:395 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of router-for-me/CLIProxyAPI@78f0c4079e (2026-08-15). Data as JSON: /api/errors/3780140746eb5ee7. Report an issue: GitHub.