google-labs-code/stitch::upload-to-stitch
plugins/stitch-design/skills/upload-to-stitch/SKILL.md
Upload local assets (images, mockups, extracted HTML) to a Stitch project. ALWAYS use this skill when you need to upload visual assets or full HTML pages to Stitch, particularly when direct MCP tool calls fail or truncate due to base64 token limits.
$ install --global
skillsauthnpx skillsauth add google-labs-code/stitch-skills stitch::upload-to-stitchInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
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Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
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TrivyContainer and dependency vulnerability scanner
95%
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SemgrepStatic code analysis for vulnerabilities
95%
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mcp-scan (Snyk)Model Context Protocol security validation
95%
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Snyk (dep)Open source security scanning
50%
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Socket.devSupply chain security analysis
50%
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VirusTotalMulti-engine malware detection
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CrowdStrikeAdvanced threat intelligence
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OWASP Dep-Check
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Last scanned: May 19, 2026, 5:14 AM112.8s2 files scanned
SKILL.md
- name:
- stitch::upload-to-stitch
- description:
- >-
- - "stitch*:
- *
Upload-to-Stitch
Upload local assets (images, mockups, HTML files) to a Stitch project using the provided upload script, which bypasses the MCP tool's base64 output token limits.
[!NOTE] The AI model cannot upload files via MCP tools directly because the base64 encoding of even a small file exceeds the model's output token limit (~16K tokens). This script reads the file and sends it directly over HTTP.
Steps
1. Identify Target Project
Use list_projects to find the correct projectId.
2. Get the API Key
Locate your active MCP server configuration file and extract the API key:
- Antigravity:
.gemini/antigravity/mcp_config.jsonor.gemini/jetski/mcp_config.json - Gemini CLI:
~/.gemini/settings.jsonor~/.gemini/extensions/Stitch/gemini-extension.json - Claude Code:
~/.claude.json
Extract:
- API Key: From the
X-Goog-Api-Keyheader or auth argument - MCP URL (optional): From the
httpUrlor endpoint argument (defaults tohttps://stitch.googleapis.com)
[!IMPORTANT] If you cannot find the API key in any of these locations, or if you cannot access these files, you MUST ask the user to provide the Stitch API key. Do not proceed without a valid API key.
3. Run Upload Script
[!WARNING] Checkpoint — User Confirmation Required. Before running the upload script, you MUST pause and present the file(s) to be uploaded (paths, sizes, and types) to the user and wait for explicit approval. Do NOT execute the upload script until the user confirms.
Use run_command to execute the Python script:
python3 <SKILL_DIR>/scripts/upload_to_stitch.py \
--project-id <PROJECT_ID> \
--file-path <PATH_TO_FILE> \
--api-key <API_KEY> \
[--api-url <STITCH_API_URL>] \
[--title <SCREEN_TITLE>]
[!TIP] macOS / SSL Certificate Troubleshooting: If the upload fails with
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] unable to get local issuer certificate, this means your Python installation does not have root certificate authorities configured. Fix it by prependingSSL_CERT_FILEusing thecertifibundle:SSL_CERT_FILE=$(python3 -c "import certifi; print(certifi.where())") python3 <SKILL_DIR>/scripts/upload_to_stitch.py \ --project-id <PROJECT_ID> \ --file-path <PATH_TO_FILE> \ --api-key <API_KEY>
Supported File Types
| Extension | MIME Type |
|:---|:---|
| .png | image/png |
| .jpg, .jpeg | image/jpeg |
| .webp | image/webp |
| .html, .htm | text/html |
The script auto-detects MIME type from the file extension.
Script Defaults
--api-urldefaults tohttps://stitch.googleapis.com--api-keyis required- Screen instances are automatically created for display
- For HTML files,
screenTypeis set toDOCUMENT; for images,IMAGE
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