@dav3/mcp-dynamics365-server/dist/auth.js

Generic MCP server for Dynamics 365 CRM operations (AI-generated side project with limited maintenance)

import axios from "axios";
export class D365AuthService {
    config;
    currentToken = null;
    constructor(config) {
        this.config = config;
    }
    async getAccessToken() {
        // Check if current token is still valid (with 5 minute buffer)
        if (this.currentToken &&
            this.currentToken.expires_at > Date.now() + 300000) {
            return this.currentToken.access_token;
        }
        // Get new token
        await this.authenticate();
        return this.currentToken.access_token;
    }
    async authenticate() {
        const tokenUrl = `https://login.microsoftonline.com/${this.config.tenantId}/oauth2/token`;
        const data = new URLSearchParams({
            grant_type: "client_credentials",
            client_id: this.config.clientId,
            client_secret: this.config.clientSecret,
            resource: this.config.resource,
        });
        try {
            const response = await axios.post(tokenUrl, data, {
                headers: {
                    "Content-Type": "application/x-www-form-urlencoded",
                },
            });
            this.currentToken = {
                ...response.data,
                expires_at: Date.now() + response.data.expires_in * 1000,
            };
            console.log("Successfully authenticated with Dynamics 365");
        }
        catch (error) {
            console.error("Authentication failed:", error.response?.data || error.message);
            throw new Error(`Authentication failed: ${error.response?.data?.error_description || error.message}`);
        }
    }
    async getAuthHeaders() {
        const token = await this.getAccessToken();
        return {
            Authorization: `Bearer ${token}`,
            "Content-Type": "application/json",
            "OData-MaxVersion": "4.0",
            "OData-Version": "4.0",
            Accept: "application/json",
        };
    }
}