AgentSkillsCN

github-image-hosting

将图片上传至img402.dev，以便嵌入GitHub PR、Issue与评论中。1MB以内的图片可免费上传（无需付费，无需认证），且保存7天。当代理需要在GitHub环境中分享图片——无论是截图、原型图、示意图，还是任何视觉素材时，均可使用此服务。触发方式包括：“截屏这个”、“附上一张图片”、“将截图添加到PR中”、“上传这个原型图”，或任何需要为GitHub生成图片的任务。

SKILL.md
--- frontmatter
name: github-image-hosting
description: >
  Upload images to img402.dev for embedding in GitHub PRs, issues, and comments.
  Images under 1MB are uploaded free (no payment, no auth) and persist for 7 days.
  Use when the agent needs to share an image in a GitHub context — screenshots, mockups,
  diagrams, or any visual. Triggers: "screenshot this", "attach an image", "add a screenshot
  to the PR", "upload this mockup", or any task producing an image for GitHub.
metadata:
  openclaw:
    requires:
      bins:
        - curl
        - gh

Image Upload for GitHub

Upload an image to img402.dev's free tier and embed the returned URL in GitHub markdown.

Quick reference

bash
# Upload (multipart)
curl -s -X POST https://img402.dev/api/free -F image=@/tmp/screenshot.png

# Response
# {"url":"https://i.img402.dev/aBcDeFgHiJ.png","id":"aBcDeFgHiJ","contentType":"image/png","sizeBytes":182400,"expiresAt":"2026-02-17T..."}

Workflow

  1. •Get image: Use an existing file, or capture a screenshot:
    bash
    screencapture -x /tmp/screenshot.png        # macOS — full screen
screencapture -xw /tmp/screenshot.png       # macOS — frontmost window
  2. •Verify size: Must be under 1MB. If larger, resize:
    bash
    sips -Z 1600 /tmp/screenshot.png  # macOS — scale longest edge to 1600px
  3. •Upload:
    bash
    curl -s -X POST https://img402.dev/api/free -F image=@/tmp/screenshot.png
  4. •Embed the returned url in GitHub markdown:
    markdown
    ![Screenshot description](https://i.img402.dev/aBcDeFgHiJ.png)

GitHub integration

Use gh CLI to embed images in PRs and issues:

bash
# Add to PR description
gh pr edit --body "$(gh pr view --json body -q .body)

![Screenshot](https://i.img402.dev/aBcDeFgHiJ.png)"

# Add as PR comment
gh pr comment --body "![Screenshot](https://i.img402.dev/aBcDeFgHiJ.png)"

# Add to issue
gh issue comment 123 --body "![Screenshot](https://i.img402.dev/aBcDeFgHiJ.png)"

Constraints

  • •Max size: 1MB
  • •Retention: 7 days — suitable for PR reviews, not permanent docs
  • •Formats: PNG, JPEG, GIF, WebP
  • •Rate limit: 1,000 free uploads/day (global)
  • •No auth required

Tips

  • •Prefer PNG for UI screenshots (sharp text). Use JPEG for photos.
  • •If a screenshot is too large, reduce dimensions with sips -Z 1600 before uploading.
  • •When adding to a PR body or comment, use gh pr comment or gh pr edit with the image markdown.

Paid tier

For permanent images (1 year, 5MB max), use the paid endpoint at $0.01 USDC via x402. See https://img402.dev/blog/paying-x402-apis for details.