How do I install the Gamma skill?

Run npx skillmds@latest add modbender/gamma-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Gamma safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Gamma?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Gamma free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Gamma by modbender — Agent Skill

Name: Gamma
Rating: 4.2 (5 reviews)
Author: modbender

File contents

Gamma API Skill

Create presentations and documents programmatically via Gamma's API.

Setup

Get API key from https://developers.gamma.app
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

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

---name: gamma-2description: 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 SkillCreate presentations and documents programmatically via Gamma's API.## Setup1. Get API key from https://developers.gamma.app2. 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/v1.0Header: X-API-KEY: <your-api-key>```## Generate Content```bashcurl -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```bashcurl https://public-api.gamma.app/v1.0/generations/<generationId> \ -H "X-API-KEY: $GAMMA_API_KEY"```**Response (completed):** `{"status": "completed", "gammaUrl": "https://gamma.app/docs/xxx", "credits": {...}}`Poll every 10-20s until `status: "completed"`.## Key Parameters| Parameter | Values | Notes ||-----------|--------|-------|| `textMode` | `generate`, `condense`, `preserve` | generate=expand, condense=summarize, preserve=keep exact || `format` | `presentation`, `document`, `social`, `webpage` | Output type || `numCards` | 1-60 (Pro), 1-75 (Ultra) | Number of slides/cards || `cardSplit` | `auto`, `inputTextBreaks` | Use `\n---\n` in inputText for manual breaks || `exportAs` | `pdf`, `pptx` | Optional export format |## Optional Parameters```json{ "additionalInstructions": "Make titles catchy", "imageOptions": { "source": "aiGenerated|unsplash|giphy|webAllImages|noImages", "model": "imagen-4-pro|flux-1-pro", "style": "photorealistic, modern" }, "textOptions": { "amount": "brief|medium|detailed|extensive", "tone": "professional, inspiring", "audience": "tech professionals", "language": "en" }, "cardOptions": { "dimensions": "fluid|16x9|4x3|1x1|4x5|9x16" }}```Note: `textOptions.tone` and `textOptions.audience` are ignored when `textMode` is `preserve`.## Other Endpoints- `GET /themes` — List available themes (use `themeId` in generation)- `GET /folders` — List folders (use `folderIds` in generation)## Workflow1. Check for API key in environment (`$GAMMA_API_KEY`) or TOOLS.md2. 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

Frequently asked questions

Gamma