gamma – OpenClaw Skill

---

name: gamma description: Create presentations, documents, social posts, and websites using Gamma's AI API. Use when asked to create slides, presentations, decks, documents, or web content via Gamma.

Gamma API Skill

Create presentations and documents programmatically via Gamma's API.

Setup

1. Get API key from https://developers.gamma.app
2. Store in environment: export GAMMA_API_KEY=sk-gamma-xxx Or add to TOOLS.md: Gamma API Key: sk-gamma-xxx

Authentication

Base URL: https://public-api.gamma.app/v1.0
Header: X-API-KEY: <your-api-key>

Generate Content

curl -X POST https://public-api.gamma.app/v1.0/generations \
  -H "Content-Type: application/json" \
  -H "X-API-KEY: $GAMMA_API_KEY" \
  -d '{
    "inputText": "Your content here",
    "textMode": "generate|condense|preserve",
    "format": "presentation|document|social|webpage"
  }'

Response: {"generationId": "xxx"}

Check Status

curl https://public-api.gamma.app/v1.0/generations/<generationId> \
  -H "X-API-KEY: $GAMMA_API_KEY"

Response (completed): {"status": "completed", "gammaUrl": "https://gamma.app/docs/xxx", "credits": {...}}

Poll every 10-20s until status: "completed".

Key Parameters

Parameter	Values	Notes
textMode	generate, condense, preserve	generate=expand, condense=summarize, preserve=keep exact
format	presentation, document, social, webpage	Output type
numCards	1-60 (Pro), 1-75 (Ultra)	Number of slides/cards
cardSplit	auto, inputTextBreaks	Use \n---\n in inputText for manual breaks
exportAs	pdf, pptx	Optional export format

Optional Parameters

{
  "additionalInstructions": "Make titles catchy",
  "imageOptions": {
    "source": "aiGenerated|unsplash|giphy|webAllImages|noImages",
    "model": "imagen-4-pro|flux-1-pro",
    "style": "photorealistic, modern"
  },
  "textOptions": {
    "amount": "brief|medium|detailed|extensive",
    "tone": "professional, inspiring",
    "audience": "tech professionals",
    "language": "en"
  },
  "cardOptions": {
    "dimensions": "fluid|16x9|4x3|1x1|4x5|9x16"
  }
}

Note: textOptions.tone and textOptions.audience are ignored when textMode is preserve.

Other Endpoints

• GET /themes — List available themes (use themeId in generation)
• GET /folders — List folders (use folderIds in generation)

Workflow

1. Check for API key in environment ($GAMMA_API_KEY) or TOOLS.md
2. Build inputText with content (can include image URLs inline)
3. POST to /generations → get generationId
4. Poll /generations/{id} until status: "completed"
5. Return gammaUrl to user