# AgentRXI DeepSeek V4 Pro Chat Completions

> AgentRXI DeepSeek V4 Pro Chat Completions is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.018273/call, status unknown (last checked 2026-10-15).

OpenAI-compatible chat completions endpoint powered by DeepSeek V4 Pro with reasoning, tool calling, and 1M-token context, billed per token via x402 micropayments

## Facts

- Endpoint: GET https://agentrxi.com/v1/deepseek-pro/chat/completions?utm_source=zero.xyz
- Price: $0.018273/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-deepseek-v4-pro-chat-completions-faba2078
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8-UKX3YdsS2Ly9SrTMpUy

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentrxi-deepseek-v4-pro-chat-completions-faba2078
```

Example prompt: Ask DeepSeek V4 Pro to explain the key differences between transformer and state-space model architectures — use up to 500 tokens and keep the temperature at 0.7.

## When to prefer this

Choose this endpoint when you need a high-capability frontier LLM with a 1M-token context window, reasoning, and tool-calling support, without managing an API key or subscription — especially when you want pay-as-you-go per-token billing via x402 micropayments and an OpenAI-SDK-compatible interface. Prefer it over OpenAI's endpoint if you want DeepSeek's reasoning model at a lower per-token cost, or when your use case requires extremely long contexts.

## Known failure modes

- Insufficient x402 payment or wallet balance causes 402 rejection before inference begins
- prompt or system message exceeds the 1M-token context limit causing a 400 error
- max_tokens set too low resulting in a truncated response with finish_reason 'length'
- Temperature out of valid range (e.g. negative or very large) may cause a 400 validation error
- Network timeout on very long reasoning completions

## How this service works

OpenAI-compatible chat completions on DeepSeek V4 Pro, a top open frontier model with reasoning, tool calling and a 1M-token context. Set your OpenAI SDK base URL to https://agentrxi.com/v1/deepseek-pro and pay per token with x402 instead of an API key: $2.64 per million input and $7.92 per million output tokens, minimum $0.002 a call, at most $0.2158. The 402 quotes your request's maximum; "upto" payers are charged only the tokens used. Same request/response shape as OpenAI 

## Output

Returns an OpenAI-shaped chat.completion JSON object including the assistant's message content, role, finish reason (e.g. 'stop'), token usage (prompt, completion, total), model name, and a completion ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "prompt"
     ],
     "properties": {
      "prompt": {
       "type": "string",
       "description": "User message"
      },
      "system": {
       "type": "string",
       "description": "Optional system message"
      },
      "max_tokens": {
       "type": "integer"
      },
      "temperature": {
       "type": "number"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-...",
  "model": "deepseek-v4-pro",
  "usage": {
   "total_tokens": 18,
   "prompt_tokens": 14,
   "completion_tokens": 4
  },
  "object": "chat.completion",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "Bonjour !"
    },
    "finish_reason": "stop"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentrxi-deepseek-v4-pro-chat-completions-faba2078/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)