import type { BaseLanguageModelInterface } from "@langchain/core/language_models/base";
import { ChainValues } from "@langchain/core/utils/types";
import { CallbackManagerForChainRun } from "@langchain/core/callbacks/manager";
import { BasePromptTemplate } from "@langchain/core/prompts";
import { BaseChain, ChainInputs } from "../base.js";
import { SerializedAPIChain } from "../serde.js";
import { LLMChain } from "../llm_chain.js";
/**
 * Interface that extends ChainInputs and defines additional input
 * parameters specific to an APIChain.
 */
export interface APIChainInput extends Omit<ChainInputs, "memory"> {
    apiAnswerChain: LLMChain;
    apiRequestChain: LLMChain;
    apiDocs: string;
    inputKey?: string;
    headers?: Record<string, string>;
    /** Key to use for output, defaults to `output` */
    outputKey?: string;
}
/**
 * Type that defines optional configuration options for an APIChain.
 */
export type APIChainOptions = {
    headers?: Record<string, string>;
    apiUrlPrompt?: BasePromptTemplate;
    apiResponsePrompt?: BasePromptTemplate;
};
/**
 * Class that extends BaseChain and represents a chain specifically
 * designed for making API requests and processing API responses.
 */
export declare class APIChain extends BaseChain implements APIChainInput {
    apiAnswerChain: LLMChain;
    apiRequestChain: LLMChain;
    apiDocs: string;
    headers: {};
    inputKey: string;
    outputKey: string;
    get inputKeys(): string[];
    get outputKeys(): string[];
    constructor(fields: APIChainInput);
    /** @ignore */
    _call(values: ChainValues, runManager?: CallbackManagerForChainRun): Promise<ChainValues>;
    _chainType(): "api_chain";
    static deserialize(data: SerializedAPIChain): Promise<APIChain>;
    serialize(): SerializedAPIChain;
    /**
     * Static method to create a new APIChain from a BaseLanguageModel and API
     * documentation.
     * @param llm BaseLanguageModel instance.
     * @param apiDocs API documentation.
     * @param options Optional configuration options for the APIChain.
     * @returns New APIChain instance.
     */
    static fromLLMAndAPIDocs(llm: BaseLanguageModelInterface, apiDocs: string, options?: APIChainOptions & Omit<APIChainInput, "apiAnswerChain" | "apiRequestChain" | "apiDocs">): APIChain;
}