Verify OpenAI-Compatible API with HTTP Request & Models

Instantly verify your OpenAI-compatible API endpoint and confirm model availability

This n8n workflow performs a manual preflight check to ensure your OpenAI-compatible base URL is reachable and that a specific model ID is available for your API key—by testing the public /health route and the authenticated /v1/models response.

What this workflow does

• Runs on manual trigger so you can quickly validate changes before deploying or switching providers.
• Sets the target configuration by specifying the base URL and the model ID you want to verify.
• Checks public health by calling the endpoint’s /health route without credentials to confirm the service responds.
• Checks authenticated models by calling /v1/models using HTTP Bearer Auth with your provider’s API key.
• Generates a verification report including:
  • healthStatus
  • the returned model IDs
  • modelAvailable (whether your requested model is present)
  • verificationMessage summarizing the outcome

Use cases

• Before updating a SaaS integration, confirm the OpenAI-compatible endpoint is live and serving models for your key.
• When onboarding a new provider (or switching base URLs), quickly validate that your required modelToCheck is available.
• Diagnose outages by distinguishing between endpoint unreachability (/health) and missing permissions/models (/v1/models).
• Extend the workflow to monitor model availability—e.g., schedule it or notify a team when a model disappears.

Technical details

• Nodes used: Manual Trigger, HTTP Request, Set, If, Code, Sticky Note.
• Authentication: HTTP Bearer Auth credential for the /v1/models call.
• Outputs: health status, returned model IDs, and a clear verification message.
• Default endpoint: The workflow mentions a default AIHub base URL (as provided in the source).

Requirements: An n8n instance and an API key for the OpenAI-compatible endpoint being checked. Update baseUrl and modelToCheck, attach your Bearer credential, run, and review healthStatus, modelAvailable, and verificationMessage.