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ollama/docs/api/authentication.mdx
2025-10-28 13:18:48 -07:00

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---
title: Authentication
---
No authentication is required when accessing Ollama's API locally via `http://localhost:11434`.
Authentication is required for the following:
* Running cloud models via ollama.com
* Publishing models
* Downloading private models
Ollama supports two authentication methods:
* **Signing in**: sign in from your local installation, and Ollama will automatically take care of authenticating requests to ollama.com when running commands
* **API keys**: API keys for programmatic access to ollama.com's API
## Signing in
To sign in to ollama.com from your local installation of Ollama, run:
```
ollama signin
```
Once signed in, Ollama will automatically authenticate commands as required:
```
ollama run gpt-oss:120b-cloud
```
Similarly, when accessing a local API endpoint that requires cloud access, Ollama will automatically authenticate the request:
```shell
curl http://localhost:11434/api/generate -d '{
"model": "gpt-oss:120b-cloud",
"prompt": "Why is the sky blue?"
}'
```
## API keys
For direct access to ollama.com's API served at `https://ollama.com/api`, authentication via API keys is required.
First, create an [API key](https://ollama.com/settings/keys), then set the `OLLAMA_API_KEY` environment variable:
```shell
export OLLAMA_API_KEY=your_api_key
```
Then use the API key in the Authorization header:
```shell
curl https://ollama.com/api/generate \
-H "Authorization: Bearer $OLLAMA_API_KEY" \
-d '{
"model": "gpt-oss:120b",
"prompt": "Why is the sky blue?",
"stream": false
}'
```
API keys don't currently expire, however you can revoke them at any time in your [API keys settings](https://ollama.com/settings/keys).