Agent C — App Store Screenshots

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

AI-designed App Store screenshot sets from your app's screens, uploaded to App Store Connect.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Agent C — App Store Screenshots": {
      "url": "https://api.theagentc.io/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (10)

• list_apps read-only

  The user's apps in Agent C, with how many screenshots each has uploaded.

  Hints: read-only yes · destructive no · idempotent not declared · open-world yes

• add_app

  Add 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'.

  Parameters:

  • name — string — Only for apps not on the App Store yet
  • app_store_url — string — e.g. https://apps.apple.com/us/app/…/id123456789

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• get_upload_link

  Best 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.

  Parameters:

  • app_id (required) — string — app_id from list_apps / add_app
  • replace — boolean — First upload clears the app's old screenshots. Use false to add iPad / iPhone Duo captures next to the iPhone ones.

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• upload_screenshots

  Upload 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 — pass replace=false when adding iPad or iPhone Duo captures next to the iPhone ones.

  Parameters:

  • app_id (required) — string — app_id from list_apps / add_app
  • images (required) — array
  • replace — boolean

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• design_set

  Claude 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.

  Parameters:

  • app_id (required) — string — app_id from list_apps / add_app
  • focus — string — Optional: what to emphasize (feature, audience, angle).
  • device — string — Screenshot size: iPhone 6.9" (1320x2868), 6.5" (1284x2778), iPad 13" (2064x2752), or the optional iPhone Duo inner (2007x2853) / outer (1398x2034) displays. iPad and Duo need the app's real iPad / Duo simulator screenshots uploaded first (replace=false); iPhone-only apps should skip iPad. Duo is export-only: App Store Connect's API doesn't accept Duo uploads yet, so send_to_app_store refuses Duo sets.
  • opener — string — Opening slide: hand holding the phone, big app icon, lifestyle photo, or a plain phone. auto lets Claude pick.
  • include — string — What to make: the screenshot set, screenshots + the App Store product page header (iOS 27), or only the header

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• get_set read-only

  Current slides, unlock status and fresh preview images for a set.

  Parameters:

  • set_id (required) — string — set_id returned by design_set

  Hints: read-only yes · destructive no · idempotent not declared · open-world yes

• edit_set

  Change 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.

  Parameters:

  • set_id (required) — string — set_id returned by design_set
  • slide — integer — 1-based slide number to change
  • device — string — Screenshot size: iPhone 6.9" (1320x2868), 6.5" (1284x2778), iPad 13" (2064x2752), or the optional iPhone Duo inner (2007x2853) / outer (1398x2034) displays. iPad and Duo need the app's real iPad / Duo simulator screenshots uploaded first (replace=false); iPhone-only apps should skip iPad. Duo is export-only: App Store Connect's API doesn't accept Duo uploads yet, so send_to_app_store refuses Duo sets.
  • layout — string
  • opener — string
  • remove — boolean
  • include — string — What to make: the screenshot set, screenshots + the App Store product page header (iOS 27), or only the header
  • move_to — integer
  • subline — string
  • headline — string — Wrap words in *stars* to color them
  • screenshot — integer — 1-based screenshot to show on this slide
  • header_layout — string — Header visual: lifestyle photo, three phones, big icon, or a hand holding the phone
  • header_subline — string
  • header_headline — string — App Store header headline (*stars* color words). No prices, URLs, platform names or #1 claims.

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• unlock_set

  Unlock 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.

  Parameters:

  • set_id (required) — string — set_id returned by design_set

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• export_set

  Render 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.

  Parameters:

  • set_id (required) — string — set_id returned by design_set

  Hints: read-only no · destructive no · idempotent not declared · open-world yes

• send_to_app_store destructive

  Upload the unlocked set into the app's editable version in App Store Connect, replacing that language's screenshots for this device size (not iPhone Duo — export_set those). 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.

  Parameters:

  • set_id (required) — string — set_id returned by design_set
  • locale — string
  • create_version — boolean

  Hints: read-only no · destructive yes · idempotent not declared · open-world yes

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