/**
 * Shared per-provider REST endpoint config (url / auth headers / query param).
 *
 * Single source of truth consumed by both `fetchProviderModels` (models.ts) and
 * `validateApiKey` (validation.ts), which both hit each provider's models
 * endpoint. Model-list response `parse` logic stays in models.ts — it has no
 * bearing on key validation.
 */
/** REST endpoint descriptor for a provider's models listing. */
export interface ProviderEndpoint {
    /** Full models-list URL against the provider's own public API. */
    url: string;
    /**
     * Path appended to a caller- or env-supplied base URL. Present only for
     * providers that can legitimately be addressed through a gateway/proxy that
     * emulates their wire protocol.
     */
    path?: string;
    /**
     * Env var carrying a base-URL override for this provider, using the same
     * name the provider's own SDK reads. Consulted by
     * {@link resolveProviderModelsUrl} when no explicit base URL is passed.
     */
    baseUrlEnv?: string;
    headers: (key: string) => Record<string, string>;
    queryParam?: string;
}
export declare const PROVIDER_ENDPOINTS: Record<string, ProviderEndpoint>;
/**
 * Resolve the models-list URL for a provider, honouring a configured base URL.
 *
 * Behind a gateway (LiteLLM, a corporate proxy, an Anthropic-compatible
 * router) the credential in play is the *gateway's*, not the provider's. Firing
 * discovery at the provider's own public API therefore 401s and yields an empty
 * catalog — which a caller that reads "empty" as "unknown" then degrades into
 * "accept anything". Resolving against the same base URL the runtime already
 * routes completions through keeps discovery and dispatch pointed at one place.
 *
 * Precedence: explicit `baseUrl` argument → the endpoint's `baseUrlEnv` value
 * in `env` → the provider's own `url`. A provider with no `path` has no
 * gateway form and always returns `url`.
 *
 * The base URL is joined tolerantly: a trailing slash is stripped, and a base
 * that already ends in the path's leading version segment (`…/v1` for a
 * `/v1/models` path) is not doubled up. Both spellings are common in the wild.
 *
 * Pure: reads only the `env` record it is handed.
 *
 * @since 1.5.0
 */
export declare function resolveProviderModelsUrl(provider: string, options?: {
    baseUrl?: string;
    env?: Record<string, string | undefined>;
}): string | undefined;
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