Opennan

3D characters

Live

Send a picture or describe a character. Get a rigged 3D model in GLB and FBX, with walk and run clips. A picture that is not in a T-pose is redrawn in one first.

from $0.91Auto T-pose · 3D model · Auto rig + clips

3D characters

from $0.91

Input

  • knight-tpose-7beb62e2.png
Quality
Engine
Walk and run clipsAnimation clips made for the rigged model.No extra charge

For the best character: one figure, front view, closed neutral mouth, plain background, nothing held in the hands.

Standard 3D

Output

Example
Example output
3D characters resultLoading animation…
  1. 1. T-pose checkNot in this result.
  2. 2. 3D modelTextured model made.
  3. 3. RigRigged, with 2 clips.
GLBThumbnailFBXRigged FBXWalking (FBX) clipRunning (FBX) clip

Each step on its own

The pipeline above chains these tools. Call any one alone: each has its own endpoint, price and page.

How the 3D pipeline works

The same steps we use to make characters for our own games.

  1. 01T-pose checkA quick look at your picture. If it is not a strict front T-pose with a closed, neutral mouth on a plain background, it is redrawn that way, keeping the same character. Arms held out keep the hands clean.
  2. 023D modelA textured, game-ready mesh made from the T-pose picture, with PBR materials and the lighting taken out. Characters and props get their own triangle budgets.
  3. 03RigA skeleton fitted to the character so it can move, with walk and run clips when you ask. You get FBX for game engines and GLB for the web.

Call 3D characters from your code

Each 3D tool is its own endpoint. Every call returns a task: poll it until it finishes. A failed run is not charged.

POSThttps://api.opennan.com/v1/3d/characters
  • POST/v1/3d/tposeAny character picture to a front T-pose.
  • POST/v1/3d/modelsPicture or prompt to a textured model.
  • POST/v1/3d/rigHumanoid model to a rigged FBX and GLB.
  • GET/v1/tasks/{id}Progress and output files.
  • GET/v1/models?category=3d3D engines and quality tiers, with prices

  1. Get an API key

    Create a key in the console. It uses the same balance as the playground.

    Create a key

  2. Send your first request

    The same request the playground sends. Set OPENNAN_KEY to your key.

    curl https://api.opennan.com/v1/3d/characters \
  -H "Authorization: Bearer $OPENNAN_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"a knight in silver armour with a blue cape","quality":"standard","animations":true,"engine":"opennan-3d-studio"}'

# Then poll until "status" is "succeeded" or "failed":
curl https://api.opennan.com/v1/tasks/<task id> -H "Authorization: Bearer $OPENNAN_KEY"

  3. Poll the task

    The call answers right away with a task id. Ask for the task until it finishes:

    GEThttps://api.opennan.com/v1/tasks/{id}
    queued
    Waiting for a worker
    running
    Being made
    succeeded
    Done: outputs[].url holds the files
    failed
    Failed: you are not charged

Errors and how to fix them

  • 401Missing or wrong key

    Send the header Authorization: Bearer with a key from the console.

  • 402Balance too low

    Add credit in Billing, then send the same call again.

  • 400A value is not accepted

    Read error.message: it names the field. Use a value from the parameter table.

  • 429Too many requests

    Wait a few seconds and try again, waiting longer after each 429.

Add Opennan to your AI app

One install gives your AI every Opennan tool: video, images, chat, voice, music, sound effects, 3D, captions and dubbing. Pick your app and follow the steps.

MCP serverhttps://api.opennan.com/v1/mcp

Works in the Codex CLI, the Codex app and the Codex IDE extension: they share ~/.codex/config.toml. If the app or IDE does not see OPENNAN_KEY, use the config.toml option with your key in it. Codex asks before each tool call: approve it to go on.

  1. Get an API key

    Create a key in the console. It starts with sk- and uses the same balance as the website.

    Create a key

  2. Save your key as OPENNAN_KEY

    # macOS / Linux (zsh shown; bash: ~/.bashrc)
echo 'export OPENNAN_KEY="sk-..."' >> ~/.zshrc
source ~/.zshrc

# Windows (PowerShell), then open a new terminal
setx OPENNAN_KEY "sk-..."

  3. Install the Opennan plugin: the server plus a skill that teaches your AI to pick models, confirm prices and wait for results

    codex plugin marketplace add Opennan/opennan-ai-plugin
codex plugin add opennan@opennan

  4. Or add only the server

    codex mcp add opennan --url https://api.opennan.com/v1/mcp --bearer-token-env-var OPENNAN_KEY

  5. Or add this to ~/.codex/config.toml

    [mcp_servers.opennan]
url = "https://api.opennan.com/v1/mcp"
http_headers = { Authorization = "Bearer sk-..." }

  6. Check that opennan is listed

    codex mcp list

  7. Restart Codex, then ask for anything

    “Make a 5 second video of rain on a neon street, a song to go with it and a poster image.”

Replace sk-... with your own key and keep it private: anyone who has it can spend your balance. Your app can list the tools before you add a key; making anything needs one.

This tool from your AI

Once Opennan is added, your AI calls this tool with arguments like these.

Tool
generate_3d_character
Example arguments
{
  "prompt": "a knight in silver armour with a blue cape",
  "quality": "standard",
  "animations": true,
  "engine": "opennan-3d-studio"
}

3D characters: questions

How much does 3D characters cost?

You pay per run, at the price shown before you start.

How do I call it from my code?

Send POST https://api.opennan.com/v1/3d/characters with your API key. It answers with a task id: ask https://api.opennan.com/v1/tasks/{id} until the task succeeds or fails.

Can my AI agent use it?

Yes. Add the MCP server https://api.opennan.com/v1/mcp and call the generate_3d_character tool, or point your agent at https://api.opennan.com/llms.txt.

What happens if a run fails?

A failed run is not charged. You pay only for results.

Why does the picture need a T-pose?

Arms held straight out keep the hands apart from the body, so the model gets clean hands and the rig bends at the right joints. Arms down or an A-pose often fuse the hands into the clothes, and a smile gets painted into the texture. That is why a picture that is not a T-pose is redrawn first, keeping the character the same.

Which files do I get?

GLB for the web, game engines and 3D apps, FBX for Roblox Studio, Unity, Unreal and Blender, and a thumbnail. Rigged runs add walk and run clips.

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