Choosing API Keys Versus OAuth Clients
For most server-to-server integrations, an API key is the pragmatic choice. You generate one key per integration inside your OpenSilo workspace, send it in the Authorization header as a bearer token, and scope it narrowly to the datasets and operations that integration actually needs. Keys are easy to rotate, cheap to revoke, and produce clean audit logs, which matters when enterprises are exchanging knowledge across silos. The trade-off is that a key identifies the integration, not a person; if downstream compliance requires knowing which employee triggered a specific request, a key alone will not tell you.
Also worth reading: What are the OpenSilo pricing plans and subscription tiers for enterprise data un-siloing? · What is OpenSilo and how does it enable secure cross-silo data exchange? · How does a delta sharing token rotation policy work?
OAuth clients exist for exactly that case. If your application acts on behalf of logged-in users, register an OAuth client and use the authorization code flow with PKCE so each user's consent is captured and tokens carry their identity. Access tokens stay short-lived, refresh tokens rotate, and scope changes take effect without redeploying anything. Practical rule of thumb: service accounts and automated pipelines get API keys; user-facing features get OAuth.
Setting Scopes For Enterprise Data Access
Authenticate each OpenSilo API request with an OAuth 2.0 client-credentials token issued for the specific workspace, not a shared account password. The connector or service first proves its identity, then requests only the scopes it needs, such as reading one silo, publishing to a named exchange, or verifying a product identifier. Tokens must be short lived, sent as Bearer credentials, and checked against the tenant's allowed audience, issuer, expiry, and scope claims before any data path is opened.
For scanned unique identifiers, treat the code as a lookup handle rather than proof of authenticity. Resolve it to the product twin, require a signature or certificate from the issuing authority, and combine that evidence with the caller's token for enterprise access. Keep human API keys limited to low-risk administration, rotate secrets automatically, log denied scope decisions, and revoke by client, device, or workspace when a batch, partner, or product record changes.
Configuring Authentication Headers And Tokens
Every request to the OpenSilo API must carry an authorization header containing a bearer token issued through your enterprise workspace. Administrators generate these tokens from the integrations panel, where each token is scoped to specific datasets and exchange permissions. Once created, the token should be stored in a secrets manager rather than hard-coded into application code, since leaked credentials are the most common source of unauthorized data access. A typical request includes the header Authorization: Bearer <token> alongside your organization identifier, which routes the call to the correct tenant environment.
Tokens expire by default after a set lifetime, so plan for rotation before the renewal window closes to avoid interrupted data flows. If a request fails authentication, the API returns a 401 status with an error code indicating whether the token is missing, expired, or lacks the required scope. For service-to-service integrations, prefer machine tokens tied to a dedicated integration account instead of personal user tokens, keeping audit trails clean and access revocable without disrupting individual team members.
Handling Token Rotation And Credential Renewal
For OpenSilo API access, authenticate each request with an OAuth 2.0 bearer access token issued by the tenant’s authorization service using the client-credentials grant. Store the client identifier and secret only in your secret manager, and send the token in the Authorization header as Bearer plus the token value. Access tokens are short-lived, so cache them only until just before expiry and obtain a fresh token rather than retrying with a stale one. This keeps machine-to-machine calls auditable and scoped to the permissions granted to the API client.
To renew credentials safely, rotate the client secret in the OpenSilo administration console before its planned retirement. Create the replacement secret, update the calling service’s configuration, and verify that new tokens are issued successfully. During the overlap window, keep the old secret valid only long enough to complete deployment, then revoke it. If a secret is exposed, revoke it immediately, issue a replacement, and invalidate existing tokens by rotating the client or waiting for their short lifetimes to expire. This settles authentication and renewal without embedding long-lived secrets in requests.
Troubleshooting Authentication Errors And Audit Logs
For OpenSilo API calls, authenticate with a workspace-scoped bearer token generated in the administration console under API credentials. Send it on every request in the Authorization header as Bearer <token>; never put it in query strings or reuse it across workspaces. Tokens inherit scopes assigned at creation, and production and sandbox credentials are separate. A 401 usually means a malformed or expired header; verify spelling, expiry, and system clock. A 403 points to missing scopes or a workspace mismatch, so inspect the token’s permissions and target workspace. Rotate compromised credentials immediately.
OpenSilo’s audit log should record each API attempt with credential identifier, workspace, source IP, endpoint, timestamp, and response status. Use those fields to separate expired credentials from scope or workspace mismatches. Correlate the request timestamp with the audit entry and confirm the token ID matches the expected integration. If no entry appears, check whether the request reached the correct environment or was blocked before authentication. This trace also confirms successful rotation and helps resolve recurring authentication errors.
OpenSilo Auth Methods Compared
| Method | Description | Security Level | Use Case |
|---|---|---|---|
| API Key | Simple header token | Standard | Basic data retrieval |
| OAuth 2.0 | Token-based flow | High | Third-party integration |
| JWT | Signed JSON object | High | Stateless verification |
| Mutual TLS | Certificate exchange | Very High | Enterprise B2B links |