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Merge pull request #14037 from NoWall57/feature/force-anthropic-custom-api-base-readme

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docs: add documentation for LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX envi…
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Krish Dholakia 2025-08-29 06:26:11 -07:00 • committed by GitHub
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21
docs/my-website/docs/providers/anthropic.md
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@ -55,8 +55,29 @@ import os
os.environ["ANTHROPIC_API_KEY"] = "your-api-key"
# os.environ["ANTHROPIC_API_BASE"] = "" # [OPTIONAL] or 'ANTHROPIC_BASE_URL'
# os.environ["LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX"] = "true" # [OPTIONAL] Disable automatic URL suffix appending
```
### Custom API Base
When using a custom API base for Anthropic (e.g., a proxy or custom endpoint), LiteLLM automatically appends the appropriate suffix (`/v1/messages` or `/v1/complete`) to your base URL.
If your custom endpoint already includes the full path or doesn't follow Anthropic's standard URL structure, you can disable this automatic suffix appending:
```python
import os
os.environ["ANTHROPIC_API_BASE"] = "https://my-custom-endpoint.com/custom/path"
os.environ["LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX"] = "true" # Prevents automatic suffix
```
Without `LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX`:
- Base URL `https://my-proxy.com` → `https://my-proxy.com/v1/messages`
- Base URL `https://my-proxy.com/api` → `https://my-proxy.com/api/v1/messages`
With `LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX=true`:
- Base URL `https://my-proxy.com/custom/path` → `https://my-proxy.com/custom/path` (unchanged)
## Usage
```python

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docs/my-website/docs/proxy/config_settings.md
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@ -558,6 +558,7 @@ router_settings:
| LITERAL_API_KEY | API key for Literal integration
| LITERAL_API_URL | API URL for Literal service
| LITERAL_BATCH_SIZE | Batch size for Literal operations
| LITELLM_ANTHROPIC_DISABLE_URL_SUFFIX | Disable automatic URL suffix appending for Anthropic API base URLs. When set to `true`, prevents LiteLLM from automatically adding `/v1/messages` or `/v1/complete` to custom Anthropic API endpoints
| LITELLM_DONT_SHOW_FEEDBACK_BOX | Flag to hide feedback box in LiteLLM UI
| LITELLM_DROP_PARAMS | Parameters to drop in LiteLLM requests
| LITELLM_MODIFY_PARAMS | Parameters to modify in LiteLLM requests