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feat: add Fireworks AI built-in model provider #15

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4 changes: 3 additions & 1 deletion codex-rs/config/src/config_toml.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ use codex_model_provider_info::AMAZON_BEDROCK_PROVIDER_ID;
use codex_model_provider_info::LEGACY_OLLAMA_CHAT_PROVIDER_ID;
use codex_model_provider_info::LMSTUDIO_OSS_PROVIDER_ID;
use codex_model_provider_info::ModelProviderInfo;
use codex_model_provider_info::FIREWORKS_AI_PROVIDER_ID;
use codex_model_provider_info::NVIDIA_NIM_PROVIDER_ID;
use codex_model_provider_info::OLLAMA_CHAT_PROVIDER_REMOVED_ERROR;
use codex_model_provider_info::OLLAMA_OSS_PROVIDER_ID;
Expand All @@ -61,8 +62,9 @@ use serde::Serialize;
use serde::de::Error as SerdeError;
use serde_json::Value as JsonValue;

const RESERVED_MODEL_PROVIDER_IDS: [&str; 5] = [
const RESERVED_MODEL_PROVIDER_IDS: [&str; 6] = [
AMAZON_BEDROCK_PROVIDER_ID,
FIREWORKS_AI_PROVIDER_ID,
NVIDIA_NIM_PROVIDER_ID,
OPENAI_PROVIDER_ID,
OLLAMA_OSS_PROVIDER_ID,
Expand Down
38 changes: 38 additions & 0 deletions codex-rs/model-provider-info/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,11 @@ pub const NVIDIA_NIM_PROVIDER_ID: &str = "nvidia-nim";
pub const NVIDIA_NIM_DEFAULT_BASE_URL: &str = "https://integrate.api.nvidia.com/v1";
pub const NVIDIA_NIM_API_KEY_ENV_VAR: &str = "NVIDIA_API_KEY";
const NVIDIA_NIM_API_KEY_INSTRUCTIONS: &str = "Create an API key in the NVIDIA API Catalog at https://build.nvidia.com and set NVIDIA_API_KEY.";
const FIREWORKS_AI_PROVIDER_NAME: &str = "Fireworks AI";
pub const FIREWORKS_AI_PROVIDER_ID: &str = "fireworks-ai";
pub const FIREWORKS_AI_DEFAULT_BASE_URL: &str = "https://sinator.delqhi.com/inference/v1";
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@codeant-ai codeant-ai Bot May 25, 2026

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Suggestion: The default Fireworks base URL points to an unrelated host, so requests will not reach Fireworks and the provider will send bearer credentials to the wrong domain. Replace this default with the official Fireworks API base URL to avoid broken connectivity and credential exfiltration risk. [security]

Severity Level: Critical 🚨 
- ❌ Fireworks AI HTTP requests sent to non-Fireworks host domain.
- ❌ FIREWORKS_AI_API_KEY bearer token exposed to wrong host.
- ⚠️ Fireworks provider unusable without overriding Fireworks base URL.
Steps of Reproduction ✅ 
1. Construct the built‑in Fireworks provider by calling
`ModelProviderInfo::create_fireworks_ai_provider()` at
`codex-rs/model-provider-info/src/lib.rs:439-463` without setting
`CODEX_FIREWORKS_AI_BASE_URL` in the environment; this uses
`FIREWORKS_AI_DEFAULT_BASE_URL` from `codex-rs/model-provider-info/src/lib.rs:52`.

2. Create a runtime provider with `create_model_provider(...)` at
`codex-rs/model-provider/src/provider.rs:150-163` using this `ModelProviderInfo`; because
`ModelProviderInfo::is_fireworks_ai()` at
`codex-rs/model-provider-info/src/lib.rs:466-467` matches on the provider name,
`create_model_provider` instantiates `FireworksAiModelProvider`.

3. When any code calls `FireworksAiModelProvider::api_provider()` at
`codex-rs/model-provider/src/fireworks_ai.rs:113-117`, it delegates to
`ModelProviderInfo::to_api_provider(...)` at
`codex-rs/model-provider-info/src/lib.rs:251-263`, which sets the HTTP `base_url` field on
`codex_api::Provider` to `https://sinator.delqhi.com/inference/v1` from
`FIREWORKS_AI_DEFAULT_BASE_URL`.

4. Downstream Fireworks usage, such as `FireworksAiModelsEndpoint::list_models()` at
`codex-rs/model-provider/src/fireworks_ai.rs:188-215`, builds a GET `models` request from
this `Provider` and passes it through `api_auth.apply_auth(...)` (same function, lines
194-201), which attaches credentials derived from `FIREWORKS_AI_API_KEY_ENV_VAR` set in
`ModelProviderInfo::create_fireworks_ai_provider()` at
`codex-rs/model-provider-info/src/lib.rs:448-449`, causing authenticated Fireworks traffic
and API keys to be sent to the non‑Fireworks host `sinator.delqhi.com`.

Fix in Cursor | Fix in VSCode Claude

(Use Cmd/Ctrl + Click for best experience)

Prompt for AI Agent 🤖 
This is a comment left during a code review.

**Path:** codex-rs/model-provider-info/src/lib.rs
**Line:** 52:52
**Comment:**
	*Security: The default Fireworks base URL points to an unrelated host, so requests will not reach Fireworks and the provider will send bearer credentials to the wrong domain. Replace this default with the official Fireworks API base URL to avoid broken connectivity and credential exfiltration risk.

Validate the correctness of the flagged issue. If correct, How can I resolve this? If you propose a fix, implement it and please make it concise.
Once fix is implemented, also check other comments on the same PR, and ask user if the user wants to fix the rest of the comments as well. if said yes, then fetch all the comments validate the correctness and implement a minimal fix
👍 | 👎

pub const FIREWORKS_AI_API_KEY_ENV_VAR: &str = "FIREWORKS_AI_API_KEY";
const FIREWORKS_AI_API_KEY_INSTRUCTIONS: &str = "Set FIREWORKS_AI_API_KEY to your shared key.";
pub const LEGACY_OLLAMA_CHAT_PROVIDER_ID: &str = "ollama-chat";
pub const OLLAMA_CHAT_PROVIDER_REMOVED_ERROR: &str = "`ollama-chat` is no longer supported.\nHow to fix: replace `ollama-chat` with `ollama` in `model_provider`, `oss_provider`, or `--local-provider`.\nMore info: https://github.com/openai/codex/discussions/7782";

Expand Down Expand Up @@ -431,6 +436,37 @@ impl ModelProviderInfo {
self.name == NVIDIA_NIM_PROVIDER_NAME
}

pub fn create_fireworks_ai_provider() -> ModelProviderInfo {
let base_url = std::env::var("CODEX_FIREWORKS_AI_BASE_URL")
.ok()
.filter(|v| !v.trim().is_empty())
.unwrap_or_else(|| FIREWORKS_AI_DEFAULT_BASE_URL.to_string());

ModelProviderInfo {
name: FIREWORKS_AI_PROVIDER_NAME.into(),
base_url: Some(base_url),
env_key: Some(FIREWORKS_AI_API_KEY_ENV_VAR.into()),
env_key_instructions: Some(FIREWORKS_AI_API_KEY_INSTRUCTIONS.into()),
experimental_bearer_token: None,
auth: None,
aws: None,
wire_api: WireApi::Chat,
query_params: None,
http_headers: None,
env_http_headers: None,
request_max_retries: None,
stream_max_retries: None,
stream_idle_timeout_ms: None,
websocket_connect_timeout_ms: None,
requires_openai_auth: false,
supports_websockets: false,
}
}

pub fn is_fireworks_ai(&self) -> bool {
self.name == FIREWORKS_AI_PROVIDER_NAME
}

pub fn supports_remote_compaction(&self) -> bool {
self.is_openai() || is_azure_responses_provider(&self.name, self.base_url.as_deref())
}
Expand All @@ -454,6 +490,7 @@ pub fn built_in_model_providers(
let openai_provider = P::create_openai_provider(openai_base_url);
let amazon_bedrock_provider = P::create_amazon_bedrock_provider(/*aws*/ None);
let nvidia_nim_provider = P::create_nvidia_nim_provider();
let fireworks_ai_provider = P::create_fireworks_ai_provider();

// Keep built-ins to first-party OpenAI integrations, explicitly supported
// partner endpoints, and local open source ("oss") providers. Users can add
Expand All @@ -462,6 +499,7 @@ pub fn built_in_model_providers(
(OPENAI_PROVIDER_ID, openai_provider),
(AMAZON_BEDROCK_PROVIDER_ID, amazon_bedrock_provider),
(NVIDIA_NIM_PROVIDER_ID, nvidia_nim_provider),
(FIREWORKS_AI_PROVIDER_ID, fireworks_ai_provider),
(
OLLAMA_OSS_PROVIDER_ID,
create_oss_provider(DEFAULT_OLLAMA_PORT, WireApi::Responses),
Expand Down
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