How to Fix Figma Weave API Invalid Credentials Error

When connecting custom integrations, middleware, or external scripts to Figma Weave, authentication failures are among the most common roadblocks. These typically manifest as standard HTTP errors—most notably 401 Unauthorized or 403 Forbidden—or cause your API client to fail during the handshake phase.

If your logs show an authentication or credential error, follow this step-by-step troubleshooting guide to identify and fix the underlying issue.

1. Differentiate Between 401 and 403 Errors Understanding the exact HTTP status code returned by the Figma Weave gateway tells you exactly where the credentials are failing: * **401 Unauthorized:** The server does not recognize your credentials. This means your access token is missing, expired, malformed, or typed incorrectly. * **403 Forbidden:** The server recognizes your credentials, but the authenticated account does not have permission to access the requested Weave resource or endpoint. This is usually a scope or plan limitation issue.

2. Format the Authorization Header Correctly Most API authentication failures are caused by minor formatting errors in the HTTP request headers. Figma Weave requires standard Bearer token authentication.

Ensure your request includes the following header exactly: `http Authorization: Bearer YOUR_PERSONAL_ACCESS_TOKEN `

Common formatting mistakes to check: * Case sensitivity: Ensure "Bearer" has a capital "B". * Spacing: There must be exactly one space between "Bearer" and your token. * Quotes: Do not wrap your token in quotation marks (e.g., "token123") inside the header value. * Variable leaks: If you are using environment variables (such as process.env.FIGMA_WEAVE_TOKEN), verify that the variable is actually loading and not returning undefined or null.

3. Regenerate and Verify Your Access Token If your formatting is correct but you still receive a `401 Unauthorized` error, your access token may have expired, been revoked, or been copied incompletely.

1. Log in to your Figma account.
2. Navigate to your Account Settings.
3. Scroll down to the Personal access tokens section.
4. Revoke the existing token associated with your Weave integration to prevent security leaks.
5. Generate a new personal access token. Ensure you check all necessary permission scopes required for Weave activities.
6. Copy the token immediately. Store it securely in your environment configuration file (.env). Do not hardcode it directly into your source files.

4. Check API Scope and Team Permissions (403 Errors) If you are getting a `403 Forbidden` error, your token is valid, but the user account associated with the token lacks the access levels required by Weave.

1. Verify Organization Access: Figma Weave requires specific organizational tier permissions. Confirm that the account generating the token is currently active within the target enterprise or organization workspace.
2. Check File/Project-Level Permissions: Ensure the authenticated user has at least "Can View" (or "Can Edit" if writing data) on the specific Figma files Weave is trying to access.
3. OAuth App Scopes: If you are using an OAuth application instead of a Personal Access Token, verify that your application registration requests the appropriate scopes (e.g., file_variables:read, files:read) during the user consent flow.

5. Isolate the Issue with a Direct cURL Test To determine if the error is caused by your code/SDK integration or if it is a general credentials issue, run a direct query using terminal cURL. Replace `YOUR_TOKEN_HERE` with your raw token:

`bash curl -H "Authorization: Bearer YOUR_TOKEN_HERE" \ -I "https://api.figma.com/v1/weave/status" ` *(Note: Replace the URL above with the specific Figma Weave endpoint you are targeting).*

• If this command returns 200 OK: Your credentials are valid. The issue lies within your application code, SDK configuration, or environment variable loader.
• If this command returns 401 or 403: The credential itself is invalid, expired, or restricted.

6. Check for Proxy or Gateway Token Stripping If your local tests work but your deployed staging or production environments fail, your hosting provider, API gateway, or corporate proxy may be stripping the `Authorization` header from outgoing requests.

• Check your server configuration to ensure headers are preserved.
• If using custom reverse proxies (like Nginx), verify that proxy_pass_header Authorization; is properly set in your location blocks.

When to Escalate If you have verified that your token works via direct cURL requests, but your SDK still rejects your credentials, or if you continue to receive `403 Forbidden` errors despite having full organizational admin rights, escalate the issue to your Figma Enterprise administrator. They can check if your organization has security policies blocking third-party API integrations or if there is an active service outage on Figma's authentication servers.