xpzouying/xiaohongshu-mcp · error

feed %s not found in noteDetailMap

Error message

feed %s not found in noteDetailMap

What it means

The unmarshaled noteDetailMap does not contain an entry for the requested feedID, so extractFeedDetail throws 'feed %s not found in noteDetailMap'. The page loaded but its initial state has no data for this note.

Source

Thrown at xiaohongshu/feed_detail.go:994

		return nil, fmt.Errorf("提取Feed详情失败: %w", err)
	}

	if result == "" {
		return nil, errors.ErrNoFeedDetail
	}

	var noteDetailMap map[string]struct {
		Note     FeedDetail  `json:"note"`
		Comments CommentList `json:"comments"`
	}

	if err := json.Unmarshal([]byte(result), &noteDetailMap); err != nil {
		return nil, fmt.Errorf("failed to unmarshal noteDetailMap: %w", err)
	}

	noteDetail, exists := noteDetailMap[feedID]
	if !exists {
		return nil, fmt.Errorf("feed %s not found in noteDetailMap", feedID)
	}

	return &FeedDetailResponse{
		Note:     noteDetail.Note,
		Comments: noteDetail.Comments,
	}, nil
}

func makeFeedDetailURL(feedID, xsecToken string) string {
	return fmt.Sprintf("https://www.xiaohongshu.com/explore/%s?xsec_token=%s&xsec_source=pc_feed", feedID, xsecToken)
}

View on GitHub (pinned to 332d196854)

Solutions

1. Verify the feedID matches exactly how it appears in the page's noteDetailMap keys (log available keys)
2. Refresh the feed ID from a current feeds list
3. Check whether the note is deleted/blocked in a browser

Example fix

// before
return nil, fmt.Errorf("feed %s not found in noteDetailMap", feedID)
// after — debug aid
keys := make([]string, 0, len(noteDetailMap)); for k := range noteDetailMap { keys = append(keys, k) }
return nil, fmt.Errorf("feed %s not found in noteDetailMap (keys: %v)", feedID, keys)

// pre-validate the ID format before calling
if feedID == "" || len(feedID) < 16 {
    return fmt.Errorf("invalid feedID %q", feedID)
}

detail, err := client.GetFeedDetailWithConfig(ctx, feedID, cfg)
if err != nil && strings.Contains(err.Error(), "not found in noteDetailMap") {
    log.Warnf("stale/missing feed %s", feedID)
    return nil // skip
}

When it happens

Trigger: Requesting a note ID that was deleted/blocked (state present but empty), a typo'd or stale feed ID, or key mismatch because the map is keyed by a different ID form.

Common situations: Using cached feed IDs from an old crawl; note removed between listing and detail fetch; xiaohongshu keying the map under a differently-formatted ID (e.g. with xsec_token).

Related errors

• ErrNoFeeds
• ErrNoFeedDetail
• 笔记不可访问: %s
• 无法获取初始状态数据
• 提取Feed详情失败: %w

AI-assisted analysis of xpzouying/xiaohongshu-mcp@332d196854 (2026-09-05). Data as JSON: /api/errors/4be227ca774c0810. Report an issue: GitHub.