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DeepSeek Harness model setup

August 14, 2026 · dshbase

DeepSeek Harness is model-agnostic — point it at any OpenAI-compatible API. Here are the three setups the community actually uses, from the official API to free tiers.

1. Official DeepSeek API

The default and simplest. Register at platform.deepseek.com, create an API key, and set it in dsh:

DEEPSEEK_API_KEY: sk-your-key-here
# base URL: https://api.deepseek.com

Store it in ~/.dsh/.credentials.yaml or under Settings → Models. No referral program — just direct registration and pay-as-you-go.

2. OpenCode Go — $5 for $60 of credits

OpenCode Go is a token plan: first month $5 gives you $60 of credits, billed per model. The most useful models on it are DeepSeek and MiMo. It pairs cleanly with dsh — hand dsh a task, let OpenCode's model credits do the work.

# add OpenCode Go as a custom provider in dsh
# base URL + your OpenCode Go key + model (deepseek / mimo)

Get it here (referral): opencode.ai/go?ref=S7Y0RD7RBS

3. Agnes — free, unlimited multimodal API

Agnes (by Sapiens AI) offers a permanently free multimodal API — the agnes-2.5-flash coding model is free with no rate limit, covering code, image, and more. A domestic China endpoint is also available.

# add Agnes as a custom OpenAI-compatible provider in dsh
# base URL (agnes endpoint) + your Agnes key + model: agnes-2.5-flash

Register at agnes-ai.com, then add it as a custom provider in dsh's Settings → Models (lowercase Provider ID + base URL + key + model).

How to add a custom provider in dsh

  1. Open Settings → Models in the web UI.
  2. Add a provider: lowercase ID, base URL, protocol, your key, and at least one model.
  3. Use Get available models to verify the endpoint.

Full model configuration is in the tutorial.

Which to pick?

  • Official DeepSeek — simplest, pay-as-you-go.
  • OpenCode Go — best bang for buck early on ($60 credits for $5).
  • Agnes — totally free, great for testing or light use.

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