A side-by-side look at the Agent C — App Store Screenshots and Chatpack MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Agent C — App Store Screenshots for developer tools work; choose Chatpack MCP for developer tools as a local process. You can also run both side by side in one mcpServers block.
AGENTC_KEY, AGENTC_AUTH.list_apps, add_app, get_upload_link.search_docs, get_document, get_integration_guide.Rows where the two servers differ are marked.
| Spec | A Agent C — App Store Screenshots | C Chatpack MCP |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 53/100 · Good | 83/100 · Excellent |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Local subprocess (stdio) |
| Auth | API key required | No auth required |
| Pricing | Freemium | Free |
| Required env vars | AGENTC_KEYAGENTC_AUTH | None listed |
| Verified owner | Community listing | Verified |
| GitHub stars | 0 | 224 |
| Directory activity | 0 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 10 | 5 |
| Full listing | View Agent C — App Store Screenshots | View Chatpack MCP |
list_appsThe user's apps in Agent C, with how many screenshots each has uploaded.add_appAdd an app by its App Store link (imports name, icon, description), or by name if it isn't released yet. Importing a live app takes ~10-30s; poll list_apps until status is 'ready'.get_upload_linkBest way to upload screenshots from files on disk: returns a one-time URL (valid 30 min) to POST the image files to with curl (multipart field 'files', up to 10 per request). Use this instead of upload_screenshots when you have a shell, so large images don't pass through the conversation.upload_screenshotsUpload 1-10 raw screenshots of the app (plain captures of the real UI, ideally 4-10, in the order you'd like them considered). Each item is base64 image data (PNG/JPEG) or a public https URL. By default replaces the app's screenshot library.design_setClaude art-directs a full App Store screenshot set from the uploaded screenshots: opening shot, headline per slide, close-ups, palette. Returns watermarked preview images, the slide list and a link to open it in the Agent C studio. Takes ~40-60 seconds.get_setCurrent slides, unlock status and fresh preview images for a set.edit_setChange one slide (headline, subline, screenshot, layout, position, or remove it), the opening shot, the device size, or the App Store header (header_*). Re-renders previews. Free.unlock_setUnlock clean, full-resolution files for a set. Uses a free unlock if the user has one; otherwise returns a $9.99 Stripe checkout link the USER must open and pay. Studio subscribers are already unlocked. Ask the user before calling.export_setRender the unlocked set at exact App Store pixels without watermark and return download links (valid 7 days). Includes the product page header (3840x1646) and search-results image (3840x2560) when the set has a header.send_to_app_storeUpload the unlocked set into the app's editable version in App Store Connect, replacing that language's screenshots for this device size. Never submits for review. Requires the user to have connected App Store Connect in Agent C. If the app has no editable version, ask the user, then call with create_version=true.search_docsSearch bundled Chatpack documentation and the authoritative llms reference. Returns document ids, links and matching excerpts with package versions.get_documentRead a complete bundled Chatpack document by id. Use llms for the authoritative integration contract or concepts/errors for troubleshooting.get_integration_guideRetrieve the repository's framework setup guide with authentication guidance and the authoritative llms reference. Examples match the bundled package versions.list_ui_blocksList public runtime exports of @chatpack/ui, including components, providers and utilities. Returns names accepted by get_ui_block.get_ui_blockRetrieve a public @chatpack/ui export's source module and usage guide. Optionally include supporting UI modules and stylesheet. Files are reference source, not a standalone copy-and-paste component.Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
No confirmed install command for Agent C — App Store Screenshots yet — follow the setup steps linked from its listing page rather than a guessed package name.
{
"mcpServers": {
"chatpack-mcp": {
"command": "npx",
"args": [
"-y",
"@chatpack/mcp"
]
}
}
}