Summer API quickstart for Claude Code

Claude Code makes your game’s assets through the Summer API: 3D models, images, video, voice, sound effects and music, saved straight into your project.

Connect

npx -y summer-engine@latest setup claude-code --yes

This adds Summer’s MCP server to Claude Code (~/.claude.json) and installs Summer’s skills in ~/.claude/skills, including summer-api, which teaches Claude Code the whole flow. Restart Claude Code after it runs.

npx -y summer-engine@latest login

The browser opens the Summer sign-in page. Sign in with your Summer account, pick a spend limit for this agent and choose Allow. The sign-in renews itself, so you do this once per computer. There are no API keys to copy.

Ask for assets

Ask in plain words, in your project folder:

Prompt

Use the Summer API to make a low-poly wooden barrel, a red health potion icon with a transparent background, and a short sword-swing sound for my game. Estimate first, tell me the total, then save the files in assets/.

The agent uses the summer-api skill: it picks a model for each asset, prices the jobs with summer api estimate, asks you, then runs them with summer api run --download assets (or --batch for many). Every file is also saved to your Summer library.

Claude Code can also use the hosted Summer MCP, with no local install: claude mcp add --transport http summer-cloud https://mcp.summerengine.com/mcp, then /mcp to sign in.

What it costs

Every model has one public price: per model, image or clip, per second, or per 1,000 characters. It is the provider’s list price. No markup on assets. A failed job costs nothing. The defaults:

I need	Model id	Runs	Price
Textured GLB models from a prompt or a picture	`3d/default`	Hunyuan 3D Pro	$0.525 per model
Concept art, sprites, textures, icons and key art	`image/default`	Nano Banana 2 Lite	$0.042 per image
Trailer shots, cutscenes and animated key art, from a prompt or a picture	`video/default`	Kling 3.0 Standard	$0.14 per second
Character lines and narration from text	`voice/default`	Expressive v3	$0.08 per 1,000 characters
Several characters talking, in one file	`dialogue/default`	Expressive v3	$0.08 per 1,000 characters
Hits, footsteps, pickups, UI clicks and loops from a description	`sound/default`	Sound Effects v2	$0.002 per second
Level, menu and combat music from a description	`music/default`	Music v2	$0.0025 per second
Animations for a rigged character: a move from words, or clips from a curated library	`motion/default`	Meshy animation library	$0.12 per animation

Every other model and its price: models and pricing. Prices checked up to 2026-10-24.

Priced before it spends. The agent reads prices from summer api models and prices each job for free with summer api estimate (POST /v1/estimate). Ask it for the total before a big batch.
Paid from your Summer credits. Jobs use your paid credits: your plan’s credits and your top-ups. No plan is needed to start.
A limit per agent. You pick a spend limit when you choose Allow. Change it or revoke the agent any time in Settings > Connected apps. See sign-in and limits.

Models and pricing: every model with examples and its price.
Jobs: queued, running and done, batches and webhooks.
Errors: no_credits, over_limit and what to show the person.

Start here

How to make

Models and pricing

Use the API

API reference

Summer API quickstart for Claude Code

What it costs

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​What it costs

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What it costs

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