Overview
AgentUse supports multiple AI providers. You need to authenticate with at least one provider to run agents.Supported Providers
Anthropic
Claude models (Opus, Sonnet, Haiku)
Supports OAuth and API keys
OpenAI
GPT models including GPT-5, GPT-4, GPT-4o
Supports OAuth and API keys
OpenRouter
Access to 100+ models via unified API
API key authentication
OpenCode Go
Low-cost open coding models curated by OpenCode
API key authentication
Amazon Bedrock
Claude, Llama, Mistral, Nova and more via AWS
AWS SigV4 or Bearer token
Custom / Local
Any OpenAI-compatible endpoint: Ollama, LM Studio, vLLM, llama.cpp, etc.
Authentication Methods
1. Interactive Login (Recommended)
The simplest way to authenticate:2. Environment Variables
Set API keys as environment variables:3. Configuration File
Create a.env file in your project:
Advanced Environment Variable Configuration
AgentUse supports flexible environment variable patterns for multiple API keys:OpenCode Go
OpenCode Go provides curated open coding models through a low-cost OpenCode subscription. AgentUse treats it as a built-in provider and automatically routes each model to the correct OpenCode Go API shape.OpenCode Go publishes its live model list at
https://opencode.ai/zen/go/v1/models, so opencode-go: model IDs are passed through rather than validated against AgentUse’s static model registry.Amazon Bedrock
Bedrock authenticates with standard AWS credentials rather thanagentuse provider login. Three modes are supported (in priority order):
1. Static IAM access keys (SigV4)
AWS_PROFILE, ~/.aws/credentials, SSO cache, EC2/ECS/EKS instance roles, etc.
Your IAM user/role needs
AmazonBedrockFullAccess (or an equivalent custom policy) and you must have requested access to the foundation model in the AWS console. The bedrock: prefix bypasses the static model registry, so any Bedrock model ID or inference-profile ARN is accepted.Custom Providers (Local LLMs)
Connect to any OpenAI-compatible endpoint, Ollama, LM Studio, vLLM, llama.cpp, and more.Adding a Custom Provider
Using Custom Providers
In your agent file:Custom providers support colons in model names,
ollama:qwen3.5:0.8b is parsed as provider ollama, model qwen3.5:0.8b.Environment Variable Overrides
Custom providers support env var overrides using the uppercased provider name:Managing Custom Providers
Managing Credentials
List Stored Credentials
Remove Credentials
Rotate API Keys
Getting API Keys
Get API keys from provider consoles:- Anthropic: console.anthropic.com → API Keys → Create Key (starts with
sk-ant-api03-) - OpenAI: platform.openai.com → API Keys → Create new secret key (starts with
sk-proj-) - OpenRouter: openrouter.ai → Keys → Create Key (starts with
sk-or-v1-) - OpenCode Go: opencode.ai/auth → Subscribe to Go → Copy API key
Authentication Priority Order
AgentUse checks authentication sources in this order:- OAuth tokens - Checked first and refreshed automatically
- Stored API keys (via
agentuse provider login) - Stored in~/.local/share/agentuse/auth.json - Environment variables -
ANTHROPIC_API_KEY,OPENAI_API_KEY,OPENROUTER_API_KEY,OPENCODE_GO_API_KEY - Custom environment variables - Using suffix patterns (e.g.,
ANTHROPIC_API_KEY_DEV) or full variable names
Runtime Model Override
Override the model at runtime using the--model flag:
CLI Commands - Model Override
See the complete reference for model override format, environment-specific keys, CI/CD examples, and sub-agent inheritance behavior.
Multi-Provider Setup
Use different providers for different agents:Provider Options
Configure provider-specific settings for fine-tuned model behavior:Reasoning Effort (recommended, provider-agnostic)
The simplest way to control how hard a model thinks is the top-levelreasoning. It works across providers, AgentUse maps one level to each
one’s native control (Anthropic thinking budget, OpenAI reasoning effort), so you
set a single value and it works whether the agent runs on Claude or GPT-5:
medium/high for genuine judgment (hard multi-constraint calls, planning,
debugging), low/minimal for lighter work, omit for the model default, and
none to force reasoning off. It is opt-in and bills reasoning tokens at
output rates.
Reach for reasoning first. The provider-specific openai.reasoningEffort
and anthropic.thinking.budgetTokens below are escape hatches for exact control,
honored only when the top-level reasoning is unset. Being top-level,
reasoning also avoids a subtle trap: a provider-specific key placed at
the wrong nesting level is silently dropped (the agent parses and runs with the
tuning never applied).
OpenAI Provider Options
For OpenAI models (especially GPT-5), you can control thinking effort and verbosity:reasoningEffort: Controls thinking effort for reasoning
none: Disable reasoning when the selected model supports itminimal: Use the lightest reasoning modelow: Faster responses with less thorough reasoningmedium: Balanced performance (default)high: More comprehensive reasoning, slower responsesxhigh: Maximum reasoning for models that support it
auto or detailed). On reasoning-capable models this defaults to auto, the reasoning tokens are billed whether or not you ask for the summary, so surfacing it is near-free. Non-reasoning models (e.g. gpt-4o) omit it automatically.textVerbosity: Controls response length and detaillow: Concise, minimal prosemedium: Balanced detail (default)high: Verbose, detailed explanations
promptCacheKey per agent so repeated runs with the same prompt prefix are easier for OpenAI to route to cache. You usually do not need to configure this. Set promptCacheRetention: 24h only when you want extended retention and the selected OpenAI model supports it.If you omit
reasoningEffort, textVerbosity, or promptCacheRetention, AgentUse leaves those fields unset and uses the OpenAI/AI SDK defaults. Reasoning effort is typically medium on reasoning models. none, xhigh, and 24h retention are model-specific OpenAI options; if a model does not support a selected option, OpenAI will reject the request. Whether a reasoning summary actually streams also depends on the effort level and task complexity.Anthropic Provider Options
For Claude models, you can enable extended thinking so the model’s reasoning streams into the session trace:- Speed vs Quality: Lower reasoning effort for faster responses
- Conciseness vs Detail: Lower verbosity for more direct answers
- Cost Optimization: Lower settings reduce token usage
- Reasoning visibility:
reasoningSummary(OpenAI) andthinking(Anthropic) surface the model’s “why” inline in the session view
Troubleshooting
Authentication failed
Authentication failed
- Verify API key is correct
- Check key hasn’t expired
- Ensure key has required permissions
- Try logging out and back in
Rate limiting
Rate limiting
- Check your API tier and limits
- Implement exponential backoff
- Consider upgrading your plan
- Use different keys for different projects
CI/CD Authentication
For automated environments:GitHub Actions
Docker
Next Steps
Quick Start
Start using your authenticated providers
Creating Agents
Build agents with your providers