Current low prices. Pro $29 → $35 Sep 17 ET.View prices
DeepSeek V4
DeepSeek V4

Independent API gateway

One DeepSeek V4 API for apps and coding agents

Create one DeepSeek-V4.io key and use the protocol your client already understands. Upstream provider credentials and routing remain on our server.

Create API KeyRead API Docs
Current API usage-pack price ends Sep 16 ET. Get 20M DeepSeek-V4.io tokens for $29; the same pack becomes $35 on Sep 17 ET.Get 20M for $29

Paid API access only. DeepSeek-V4.io is independent and is not the official DeepSeek website.

Chat Completions

POST /api/v1/chat/completions

OpenAI SDKs, OpenCode, Pi, Cline, and OpenClaw

Responses

POST /api/v1/responses

Codex and agentic Responses tool loops

Anthropic Messages

POST /api/v1/messages

Claude Code and Anthropic-compatible clients

Make your first request

  1. Create a paid API key.
    Open the Developer Dashboard and save the key when it is shown.
  2. Use the public model id.
    Use deepseek-v4-flash; the gateway maps the upstream model internally.
  3. Stream or call tools.
    Structured messages, SSE, tool calls, and tool results are passed through the selected protocol.
curl https://deepseek-v4.io/api/v1/chat/completions \
  -H "Authorization: Bearer $DEEPSEEK_V4_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4-flash",
    "messages": [{"role": "user", "content": "Explain this function."}]
  }'

Billing and service boundary

Paid token packs fund DeepSeek-V4.io web chat and DeepSeek-V4.io API usage. The free signup balance does not allow API key creation.

DeepSeek Platform and OpenRouter accounts, keys, and balances are separate from this service. DeepSeek-V4.io may use third-party inference providers, but clients never receive the upstream credential.

Usage is settled after the provider reports input and output tokens. Review requests and token usage in the Developer Dashboard.

Browse one-tool setup guides

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API Pricing

Integration Guides

Pre-built Integrations

Model Overview