Call Ollama's OpenAI-compatible API at http://localhost:11434/v1 with any api key string
domain: ollama.com · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Install Ollama and pull a model: `ollama pull qwen3:8b`.
Ensure the server is running (`ollama serve`) listening on 127.0.0.1:11434.
Use base_url `http://localhost:11434/v1/` with any non-empty api_key (e.g. the string 'ollama') — required but ignored.
curl example: `curl http://localhost:11434/v1/chat/completions -H "Content-Type: application/json" -d '{"model":"qwen3:8b","messages":[{"role":"user","content":"Say this is a test"}]}'`.
Or SDK: `OpenAI(base_url='http://localhost:11434/v1/', api_key='ollama')`.
Known gotchas
Partial compatibility: supports /v1/chat/completions, /v1/completions, /v1/models, /v1/embeddings, and (v0.13.3+) /v1/responses.
Supported: tools, reasoning_effort, response_format(JSON mode), seed, stream. NOT supported and error: tool_choice, logit_bias, user, n.
Vision via chat completions takes base64 data URIs for image content; raw image URLs are not supported.
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