#Providers with the SDK

Every agent configuration names both the provider and model:

config: {
  provider: "codex/gpt-5.5",
}

The first / separates the provider from the model. Model IDs can contain additional slashes.

#Configure a session

const agent = await client.agents.create({
  config: {
    provider: "codex/gpt-5.5",
    modeId: "full-access",
    thinkingOptionId: "high",
    featureValues: {
      web_search: false,
    },
  },
  cwd: process.cwd(),
  prompt: "Implement the accepted plan and run focused tests.",
});

Field	Meaning
provider	Required provider/model selection.
modeId	Provider operating or permission mode.
thinkingOptionId	Provider reasoning level.
featureValues	Values for features returned by providers.listFeatures().
options	Provider-native settings such as sandbox and permission rules.
systemPrompt	Additional system or developer instructions.
mcpServers	Session-scoped MCP servers.
toolPolicy	Exact preapproval rules for MCP tools.

Provider options lists the accepted sandbox and permission settings.

#Discover installed providers and models

const snapshot = await client.providers.waitForReady({
  cwd: process.cwd(),
  timeoutMs: 60_000,
});

for (const entry of snapshot.entries) {
  if (entry.status !== "ready") continue;

  for (const model of entry.models ?? []) {
    console.log(`${entry.provider}/${model.id}`);
  }
}

An entry finishes as ready, unavailable, or error. snapshot() returns immediately and can include loading entries.

#Select a discovered model

const snapshot = await client.providers.waitForReady({ cwd: process.cwd() });
const entry = snapshot.entries.find((candidate) => candidate.status === "ready");
const model = entry?.models?.find((candidate) => candidate.isDefault) ?? entry?.models?.[0];

if (!entry || !model) throw new Error("No provider model is ready");

const agent = await client.agents.create({
  config: {
    provider: `${entry.provider}/${model.id}`,
  },
  cwd: process.cwd(),
  prompt: "Summarize this repository.",
});

#Discover modes, thinking levels, and features

const models = await client.providers.listModels("codex", { cwd: process.cwd() });
const modes = await client.providers.listModes("codex", { cwd: process.cwd() });

const selectedModel = models.models[0]?.id;
const selectedMode = modes.modes[0]?.id;
if (!selectedModel) throw new Error("No Codex model is available");

const features = await client.providers.listFeatures({
  provider: `codex/${selectedModel}`,
  cwd: process.cwd(),
  modeId: selectedMode,
});

Use IDs returned by the daemon. Provider installations and configured models differ between hosts.

#Diagnose an unavailable provider

const result = await client.providers.diagnostic("codex");
console.error(result.diagnostic);

Host-level profiles, binaries, credentials, and custom providers belong in Custom providers.