FarOut DeepSeek V4 Pro Chat Completions (x402)

x402

FarOut DeepSeek V4 Pro Chat Completions (x402) is a paid API for AI agents from farouter.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Runs DeepSeek V4 Pro chat/reasoning inference via a pay-per-call API using USDC on Base — no API key or prepaid balance required.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Fixed-price chat completions for deepseek-v4-pro on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.037/1M input tokens, $0.111/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.

Output

Returns an OpenAI-compatible JSON response with a choices array containing the assistant's message content and finish_reason, plus a usage object with prompt_tokens and completion_tokens counts.

Example use cases

Agentic coding assistant on-demand

“Use DeepSeek V4 Pro to generate a complete TypeScript class for a rate-limited HTTP client with retry logic — limit the response to 1024 tokens and pay per call with USDC, no account setup.”

Autonomous reasoning task in a pipeline

“Send this multi-step logic problem to DeepSeek V4 Pro and get a reasoned answer: 'If A implies B, B implies C, and C is false, what can we conclude about A?' Keep it under 256 tokens.”

Anonymous LLM call from a script

“Without signing up for any service, call DeepSeek V4 Pro and ask it to summarize the following text in 3 bullet points — max 300 tokens — and charge the USDC micropayment automatically.”

Technical details

Endpoint

POSThttps://farouter.tech/v1/models/deepseek-v4-pro/chat/completions

When to prefer

Choose this endpoint when you need DeepSeek V4 Pro specifically for deep reasoning or coding tasks and want true pay-per-call billing in USDC with no API key, no account, and no prepaid credits — ideal for autonomous agents or scripts that must operate without pre-registered credentials.

Side effects

Insufficient USDC balance or failed x402 payment — returns 402 Payment Required
Invalid or unsupported model ID — returns 400 Bad Request
messages array is empty or malformed — returns 400 validation error
max_tokens or max_completion_tokens set too low for the requested output — truncated response with finish_reason=length
Network timeout on long reasoning outputs — connection dropped mid-stream when streaming is enabled

Input

Schema · Request body

Field	Type	Description
model	string	Model id from GET /v1/models, e.g. glm-5.3. No provider prefix.
stream	boolean	SSE streaming.
messages	array	Chat messages, [OI]-compatible {role, content}.
max_tokens	integer	Output token budget. Sets your spending cap; actual usage is what gets settled (true-up).
temperature	number	Sampling temperature.
max_completion_tokens	integer	Alias of max_tokens (gpt-5.x models).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "usage": {
      "prompt_tokens": 6,
      "completion_tokens": 8
    },
    "choices": [
      {
        "message": {
          "role": "assistant",
          "content": "Hello! How can I help?"
        },
        "finish_reason": "stop"
      }
    ]
  }
}

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How this service works

Output

Returns an OpenAI-compatible JSON response with a choices array containing the assistant's message content and finish_reason, plus a usage object with prompt_tokens and completion_tokens counts.

Example use cases

Agentic coding assistant on-demand

“Use DeepSeek V4 Pro to generate a complete TypeScript class for a rate-limited HTTP client with retry logic — limit the response to 1024 tokens and pay per call with USDC, no account setup.”

Autonomous reasoning task in a pipeline

“Send this multi-step logic problem to DeepSeek V4 Pro and get a reasoned answer: 'If A implies B, B implies C, and C is false, what can we conclude about A?' Keep it under 256 tokens.”

Anonymous LLM call from a script

“Without signing up for any service, call DeepSeek V4 Pro and ask it to summarize the following text in 3 bullet points — max 300 tokens — and charge the USDC micropayment automatically.”

Technical details

Endpoint

POSThttps://farouter.tech/v1/models/deepseek-v4-pro/chat/completions

When to prefer

Side effects

Insufficient USDC balance or failed x402 payment — returns 402 Payment Required
Invalid or unsupported model ID — returns 400 Bad Request
messages array is empty or malformed — returns 400 validation error
max_tokens or max_completion_tokens set too low for the requested output — truncated response with finish_reason=length
Network timeout on long reasoning outputs — connection dropped mid-stream when streaming is enabled

Input

Schema · Request body

Field	Type	Description
model	string	Model id from GET /v1/models, e.g. glm-5.3. No provider prefix.
stream	boolean	SSE streaming.
messages	array	Chat messages, [OI]-compatible {role, content}.
max_tokens	integer	Output token budget. Sets your spending cap; actual usage is what gets settled (true-up).
temperature	number	Sampling temperature.
max_completion_tokens	integer	Alias of max_tokens (gpt-5.x models).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "usage": {
      "prompt_tokens": 6,
      "completion_tokens": 8
    },
    "choices": [
      {
        "message": {
          "role": "assistant",
          "content": "Hello! How can I help?"
        },
        "finish_reason": "stop"
      }
    ]
  }
}