docs/providers/sglang.md
SGLang serves open-weight models via an OpenAI-compatible HTTP API. OpenClaw connects to SGLang using the openai-completions provider family with auto-discovery of available models.
| Property | Value |
|---|---|
| Provider id | sglang |
| Plugin | bundled, enabledByDefault: true |
| Auth env var | SGLANG_API_KEY (any non-empty value if server has no auth) |
| Onboarding flag | --auth-choice sglang |
| API | OpenAI-compatible (openai-completions) |
| Default base URL | http://127.0.0.1:30000/v1 |
| Default model placeholder | sglang/Qwen/Qwen3-8B |
| Streaming usage | Yes (supportsStreamingUsage: true) |
| Pricing | Marked external-free (modelPricing.external: false) |
OpenClaw also auto-discovers available models from SGLang when you opt in with SGLANG_API_KEY. Use sglang/* in agents.defaults.models to keep discovery dynamic when you also configure a custom SGLang base URL. See Model discovery (implicit provider) below.
- `http://127.0.0.1:30000/v1`
```bash
export SGLANG_API_KEY="sglang-local"
```
Or configure the model manually:
```json5
{
agents: {
defaults: {
model: { primary: "sglang/your-model-id" },
},
},
}
```
When SGLANG_API_KEY is set (or an auth profile exists) and you do not
define models.providers.sglang, OpenClaw will query:
GET http://127.0.0.1:30000/v1/modelsand convert the returned IDs into model entries.
<Note> If you set `models.providers.sglang` explicitly, OpenClaw uses your declared models by default. Add `"sglang/*": {}` to `agents.defaults.models` when you want OpenClaw to query that configured provider's `/models` endpoint and include all advertised SGLang models. </Note>Use explicit config when:
contextWindow/maxTokens values.{
models: {
providers: {
sglang: {
baseUrl: "http://127.0.0.1:30000/v1",
apiKey: "${SGLANG_API_KEY}",
api: "openai-completions",
models: [
{
id: "your-model-id",
name: "Local SGLang Model",
reasoning: false,
input: ["text"],
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
contextWindow: 128000,
maxTokens: 8192,
},
],
},
},
},
}
| Behavior | SGLang |
|----------|--------|
| OpenAI-only request shaping | Not applied |
| `service_tier`, Responses `store`, prompt-cache hints | Not sent |
| Reasoning-compat payload shaping | Not applied |
| Hidden attribution headers (`originator`, `version`, `User-Agent`) | Not injected on custom SGLang base URLs |
Verify the server is running and responding:
```bash
curl http://127.0.0.1:30000/v1/models
```
**Auth errors**
If requests fail with auth errors, set a real `SGLANG_API_KEY` that matches
your server configuration, or configure the provider explicitly under
`models.providers.sglang`.
<Tip>
If you run SGLang without authentication, any non-empty value for
`SGLANG_API_KEY` is sufficient to opt in to model discovery.
</Tip>