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Replit integrates with Mural by using Mural’s REST API through normal HTTP requests. You don’t connect Replit and Mural through any built-in magic link — you authenticate using a Mural Developer App and an OAuth 2.0 token or personal access token, then call Mural’s API endpoints from your Replit project. You can use Replit’s Secrets feature to store Mural credentials safely, run a small Express.js or Flask service inside a Repl to expose webhook endpoints or automate board updates, and make API calls to handle data like murals, widgets, or templates. This integration is explicit and works like any external API integration from Replit.
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MURAL_CLIENT_IDMURAL_CLIENT_SECRETMURAL\_TOKEN (after you complete OAuth flow, or use a manually created token)https://your-repl-name.username.repl.co/oauth/callback).fetch or axios) to talk to the API from server-side code in your Repl.
import express from "express"
import fetch from "node-fetch"
const app = express()
const port = 3000
app.get("/", async (req, res) => {
try {
const response = await fetch("https://app.mural.co/api/public/v1/murals", {
headers: {
"Authorization": `Bearer ${process.env.MURAL_TOKEN}`,
"Content-Type": "application/json"
}
})
const data = await response.json()
res.json(data) // Send mural data to browser
} catch (err) {
console.error(err)
res.status(500).send("Error fetching murals")
}
})
app.listen(port, "0.0.0.0", () => {
console.log(`Server running on port ${port}`)
})
// Run this Repl and open the webview to call Mural API.
If you want Mural to notify your app when something changes (like a new mural or update), you can register a webhook via the Mural API and have it call your Replit endpoint. Make sure your Repl is running and accessible publicly when you register the URL.
/webhook.
app.post("/webhook", express.json(), (req, res) => {
console.log("Mural webhook event:", req.body)
res.sendStatus(200) // Acknowledge receipt
})
At its core, integrating Replit with Mural means hosting your integration logic in a Repl (Express/FastAPI) and explicitly handling credentials, network calls, and webhook callbacks yourself. It’s simple once you have the token — just call Mural’s API endpoints directly and respond to events just like with any standard REST service.
1
Connect Mural’s REST API to a Replit-hosted web service that reads board data (widgets, comments, reactions) and displays real-time feedback in a dashboard. This is practical when teams use Mural for brainstorming, and you want to visualize engagement statistics automatically. You run the Replit server with Flask or FastAPI, storing your MURAL_API_TOKEN in Replit Secrets. Each time a Mural board changes, you fetch updated data via Mural’s public API and update your Replit-hosted chart using polling or a webhook handler. The Repl runs continuously through Replit Deployments or background Workers.
# main.py
import os, requests
from flask import Flask, jsonify
app = Flask(__name__)
MURAL_TOKEN = os.environ['MURAL_API_TOKEN']
@app.route("/stats")
def board_stats():
board_id = "YOUR_BOARD_ID"
res = requests.get(
f"https://app.mural.co/api/public/v1/boards/{board_id}",
headers={"Authorization": f"Bearer {MURAL_TOKEN}"}
)
data = res.json()
return jsonify({"widget_count": len(data["data"]["widgets"])} )
app.run(host="0.0.0.0", port=8080)
2
Set up a Replit endpoint that listens for Mural webhooks (for example: new sticky note created, comment added). When triggered, your Replit backend processes that event — maybe logs it to a database, posts a notification to Slack, or triggers another API. This is useful in team retrospectives or idea validation where visual work on Mural should automatically update other systems. Webhooks are configured inside Mural’s developer settings, pointing to your Replit URL (https://your-repl-name.username.repl.co/webhook).
# webhook.py
from flask import Flask, request
app = Flask(__name__)
@app.route("/webhook", methods=["POST"])
def mural_webhook():
payload = request.get_json()
event = payload.get("eventType")
if event == "widgetCreated":
print("New sticky note added:", payload["data"]["text"])
return "", 200
app.run(host="0.0.0.0", port=8080)
3
Integrate Mural’s OAuth 2.0 authorization into a Replit app to let users log in with their Mural account and generate new boards automatically. This helps when building custom internal tools for workshops or classes: the Replit app allows participants to authenticate via Mural, select templates, and clone boards programmatically. Store client credentials (CLIENT_ID, CLIENT_SECRET) in Replit Secrets and handle the OAuth redirect URI using a Replit-hosted callback route. Use Mural’s POST /api/v1/boards endpoint to create new boards for authenticated users.
# oauth_flow.py
import os, requests
from flask import Flask, request, redirect
app = Flask(__name__)
CLIENT_ID = os.environ['MURAL_CLIENT_ID']
CLIENT_SECRET = os.environ['MURAL_CLIENT_SECRET']
@app.route("/login")
def login():
return redirect(f"https://app.mural.co/api/public/v1/authorization/oauth2?client_id={CLIENT_ID}&response_type=code&redirect_uri=https://your-repl-name.username.repl.co/callback")
@app.route("/callback")
def callback():
code = request.args.get("code")
res = requests.post("https://app.mural.co/api/public/v1/authorization/oauth2/token", data={
"grant_type": "authorization_code",
"code": code,
"redirect_uri": "https://your-repl-name.username.repl.co/callback",
"client_id": CLIENT_ID,
"client_secret": CLIENT_SECRET
})
token = res.json().get("access_token")
return f"Mural token: {token}"
app.run(host="0.0.0.0", port=8080)
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1
A common reason the Mural API fails to connect inside a Replit project is that outbound HTTPS requests are being blocked by invalid authentication or misconfigured environment variables. The Mural API requires a valid access token obtained via OAuth, which must be passed in the Authorization header. If your token isn’t loaded correctly from Replit Secrets (or if the redirect URI you registered doesn’t match your running Repl URL), the API will reject requests.
First, verify your Mural access token is set as an environment variable in the Replit Secrets panel. Use process.env.MURAL\_TOKEN to access it inside your code. Then, ensure your fetch/axios call points to the correct Mural endpoint (e.g. https://app.mural.co/api/public/v1). Replit’s outgoing internet access works fine—authentication is usually the real problem.
// Example fetch to Mural API with a valid token
import fetch from "node-fetch";
const token = process.env.MURAL_TOKEN;
fetch("https://app.mural.co/api/public/v1/users/me", {
headers: { Authorization: `Bearer ${token}` }
})
.then(res => res.json())
.then(data => console.log(data))
.catch(err => console.error("Mural API error:", err));
If this still fails, re-authorize your app, ensure Secrets are saved, and rerun the Repl so the environment reloads properly.
2
CORS errors happen because browsers block requests from one origin (your Replit web app) to another (Mural’s API) unless the destination allows it. Since Mural’s API doesn’t set permissive CORS headers, you can’t call it directly from frontend JavaScript. The valid fix: move the Mural request to your Replit backend (Node/Express server), and have your frontend talk only to that backend.
// index.js - Node backend on Replit
import express from "express"
import fetch from "node-fetch"
const app = express()
app.get("/mural", async (req, res) => {
const muralRes = await fetch("https://app.mural.co/api/public/v1/workspaces", {
headers: { "Authorization": `Bearer ${process.env.MURAL_TOKEN}` }
})
const data = await muralRes.json()
res.json(data) // Send safe JSON to your frontend
})
app.listen(3000, "0.0.0.0")
This works because browser CORS doesn’t apply to server-to-server calls. Now your frontend can fetch /mural from the same origin without CORS errors.
3
The Mural API key environment variable is not loading in Replit Secrets because the variable name or spelling doesn’t match exactly in your code, or your Repl was restarted without syncing environment variables from Replit’s Secrets manager into the active runtime. Secrets in Replit must be explicitly defined and referenced as process.env.MURAL_API_KEY; otherwise, your runtime sees it as undefined. Also, make sure you didn’t create it in a Deployment separate from the Repl, because Deployment secrets don’t auto-sync with the Workspace secrets.
// Test secret access
console.log("Mural key:", process.env.MURAL_API_KEY)
Developers often skip verifying the webhook signature when Mural sends events to your Replit app. This leads to accepting spoofed requests. Mural includes an X-Mural-Signature header that should be verified using your Client Secret stored in Replit Secrets. Always match this signature before processing any payload. Without this, attackers could trigger fake updates.
import crypto from "crypto";
import express from "express";
const app = express();
app.use(express.json());
app.post("/webhook", (req, res) => {
const signature = req.headers["x-mural-signature"];
const expected = crypto
.createHmac("sha256", process.env.CLIENT_SECRET)
.update(JSON.stringify(req.body))
.digest("hex");
if (signature !== expected) return res.status(401).send("Invalid signature");
res.send("OK");
});
In Replit, binding your server to localhost or 127.0.0.1 means it’s not exposed outside the Repl. Mural can’t reach your webhook this way. Always bind to 0.0.0.0 so that it’s accessible via the public URL that Replit assigns. Only explicitly mapped ports (usually 3000 or chosen in your config) will be reachable.
// Wrong: app.listen(3000, "localhost")
// Correct:
app.listen(3000, "0.0.0.0", () => {
console.log("Server exposed for Mural webhook");
});
Mural’s REST API uses OAuth 2.0. After authentication, you get access_token and refresh_token. The access token expires, often within an hour. Many developers forget to refresh it, causing “401 Unauthorized” errors after initial success. You must securely store and periodically exchange the refresh token for a new access token using Mural’s token endpoint.
async function refreshToken() {
const res = await fetch("https://app.mural.co/api/public/v1/authorization/token", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
grant_type: "refresh_token",
refresh_token: process.env.MURAL_REFRESH_TOKEN,
client_id: process.env.MURAL_CLIENT_ID,
client_secret: process.env.MURAL_CLIENT_SECRET,
}),
});
return res.json();
}
When testing integrations in Replit, it’s easy to accidentally log sensitive values. Replit consoles are public by design if your Repl is public. Any logged Mural client secret or token becomes visible to others. Always rely on Replit Secrets (environment variables) and never interpolate them into browser-visible code or JSON responses.
// Bad: console.log(process.env.MURAL_CLIENT_SECRET)
// Correct: use secret only in backend auth calls
const MURAL_API_KEY = process.env.MURAL_CLIENT_SECRET;
This prompt helps an AI assistant understand your setup and guide you through the fix step by step, without assuming technical knowledge.
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