Recraft AI MCP Server

import { CallToolResult } from "@modelcontextprotocol/sdk/types.js" import { GenerateImageResponse, Image } from "./api" import { RecraftApi } from "./RecraftApi" import { existsSync, mkdirSync } from "fs" import { downloadImagesAndMakePreviews } from "./utils/response" export class RecraftServer { api: RecraftApi private imageStorageDirectory: string | undefined private initialized: boolean = false constructor(api: RecraftApi, imageStorageDirectory: string | undefined) { this.api = api this.imageStorageDirectory = imageStorageDirectory } get isLocalResultsStorage(): boolean { return !!this.imageStorageDirectory } initializeIfNeeded = () => { if (this.initialized) { return } this.initialized = true if (this.imageStorageDirectory && !existsSync(this.imageStorageDirectory)) { mkdirSync(this.imageStorageDirectory, { recursive: true }) } } transformGenerateImageResponseToCallToolResult = async (result: GenerateImageResponse): Promise<CallToolResult> => { const {downloadedImages: images, previews} = await downloadImagesAndMakePreviews(this.imageStorageDirectory, result.data) const pathOrUrlDesc = this.isLocalResultsStorage ? 'path' : 'URL' const ending = `${images.length === 1 ? '' : 's'}` const message = `Generated ${images.length} image${ending}.\n` + `Original image${ending} ${images.length === 1 ? 'is' : 'are'} saved to:\n${images.map(({pathOrUrl}) => `- ${pathOrUrl}`).join('\n')}` + `\nBelow you can see lower quality preview${ending} of generated image${ending}.` + `${previews.length < images.length ? `\nNote: last ${images.length - previews.length} images are not shown due to message limit, but you can still find them by given ${pathOrUrlDesc}s.` : ''}` const content = [] content.push({ type: 'text', text: message, }) content.push(...previews) return { content: content, isError: false } as CallToolResult } transformSingleImageOperationToCallToolResult = async (image: Image, message: string): Promise<CallToolResult> => { const {downloadedImages, previews} = await downloadImagesAndMakePreviews(this.imageStorageDirectory, [image]) const imageData = downloadedImages[0] const pathOrUrlDesc = this.isLocalResultsStorage ? 'local path' : 'URL' const totalMessage = message + '\n' + `Resulting image is saved to:\n- ${imageData.pathOrUrl}\n` + (previews.length == 0 ? `Note: preview image is not shown due to message limit, but you can find the resulting image by ${pathOrUrlDesc}.` : `Below you can see the lower quality preview image of the result.` ) const content = [] content.push({ type: 'text', text: totalMessage, }) content.push(...previews) return { content: content, isError: false } as CallToolResult } }