Ollama / Ollama

Cannot Connect to Ollama API — Connection Refused Error [Errno 111]

Fix Ollama API connection refused error (Errno 111) Includes evidence for Ollama troubleshooting demand.

Source-backed Last updated May 12, 2026 2 sources Needs local verification

Category: Ollama
Error signature: RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused
Quick fix: Confirm the local service is running on the expected host and port, then retry the smallest request.
Updated: May 12, 2026
Verification status: Source-backed
Evidence: 2 public source URLs

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Ollama, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused is a Ollama failure pattern reported for developers trying to fix ollama api connection refused error (errno 111). Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Sentry-reported production issue: ConnectError [Errno 111] Connection refused when connecting to Ollama API. Multiple instances traced to httpcore connection failure.

Common causes

Ollama is a widely used local LLM platform. Connection refused errors block all local AI inference, affecting developers running self-hosted models for cost savings or privacy.
Sentry-reported production issue: ConnectError [Errno 111] Connection refused when connecting to Ollama API. Multiple instances traced to httpcore connection failure.

Quick fixes

Confirm the exact error signature matches RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused.
Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
Confirm the local service is running on the expected host and port, then retry the smallest request.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused exactly before applying the quick fix.
Compare the failing environment with Ollama versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused mean in Ollama?

RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused indicates the workflow described by "Cannot Connect to Ollama API — Connection Refused Error [Errno 111]" failed in a Ollama context. Start by confirming the exact signature and the component that emitted it.

What should I check first for RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused?

Check whether this cause matches your environment: Ollama is a widely used local LLM platform. Connection refused errors block all local AI inference, affecting developers running self-hosted models for cost savings or privacy.

Is the RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused guidance source-backed?

The "Cannot Connect to Ollama API — Connection Refused Error [Errno 111]" page is labeled source-backed. It has 2 public source URLs from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused?

For "Cannot Connect to Ollama API — Connection Refused Error [Errno 111]", avoid applying "Confirm the local service is running on the expected host and port, then retry the smallest request." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging RuntimeError: Cannot connect to Ollama API — ConnectError: [Errno 111] Connection refused?

For "Cannot Connect to Ollama API — Connection Refused Error [Errno 111]", collect the failing Ollama command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.