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Summer is the game engine built for AI. With the Summer API, your agent signs in once, sends one call and gets back a file your game can load: a GLB, a PNG or an audio file, saved to your Summer library.
No markup on assets. Every model at the provider’s list price. Each price is on the models page. A failed job costs nothing.
A stylized wooden treasure chest with gold trim, made by a Summer 3D model

From the prompt "a stylized treasure chest, game prop": a textured GLB

A frost golem character in armour with glowing blue crystals, made by a Summer 3D model

From a one-paragraph prompt: a frost golem hero as a textured GLB

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Set up with your agent

Paste this into Claude Code, Codex, Cursor, Hermes or any agent that can run commands. You sign in once and choose Allow with a spend limit, and the agent makes its first asset.
Prompt for your agent
In ChatGPT or Claude, add https://mcp.summerengine.com/mcp as a connector instead. See Agents.

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What you can make

3D models

Props, characters and buildings as textured GLB files, from text or a picture. Add a rig and animations on the same job.

Images

Concept art, sprites, textures, icons and key art, with an optional transparent background.

Video

Trailer shots, cutscenes and animated key art, from text or a picture.

Voice and dialogue

Character lines, narration and conversations between several characters.

Sound effects

Hits, footsteps, pickups, UI clicks and seamless loops.

Music

Level, menu and combat music from a description.
Browse every model with examples and prices: summerengine.com/models.

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How to make it

Step-by-step guides that chain the right models for one real job, with the exact CLI, API and MCP steps and what the whole chain costs. Hand one to your agent and it runs it.

A 3D character

Concept, model, rig and animations.

Cutscenes

Shots that keep your character on-model.

A game trailer

Real gameplay, a hook shot, music and store cuts.

Sound effects

A full pack in one batch.

Cutscene music

Cues timed to the scene.

Every guide

Voice lines, logos, textures, props, icons, title screens.

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One call

Images, voice and sound come back in the same call. A 3D model takes a few minutes: the call answers with a job id, and your agent follows it until the file is ready. With the CLI it is one command: summer api run 3d/default --input '...' --download. The quickstart makes a 3D model end to end.

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Why Summer

  • Curated and tested for games. A short list of the best model for each job, not hundreds. Each default id, such as 3d/default, runs the model Summer tests first and moves when a better one passes.
  • Game-ready output. 3D models come back as GLB files with textures, and with a rig and animations when you ask. Images can come back with a transparent background. Sound effects can loop.
  • Files you keep. Every result is saved to your Summer library, private to you, with a Summer URL and an asset id. In Summer Engine, your agent imports it by id.
  • The price before you spend. POST /v1/estimate gives the exact price of a request and a quote that holds it for 15 minutes. It is free and needs no sign-in.
  • Safe for agents. No API keys to leak. Each agent you connect has its own spend limit, and you can revoke it at any time. Retries with the same Idempotency-Key never charge twice.
  • One balance. Every model draws from your paid Summer credits: your plan’s credits or your top-ups. Top-ups alone are enough.

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Works with every agent

Quickstart

Sign in, check the price, make a 3D model and save the GLB. curl, TypeScript and Python.

Models and pricing

Every model with its price, typical time and output format.