# Saymon RU Data API – OpenAI GPT-5.6 Sol Chat (AnyModel)

> Saymon RU Data API – OpenAI GPT-5.6 Sol Chat (AnyModel) is a paid API for AI agents from payforapi.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Provides LLM chat completions via OpenAI GPT-5.6 Sol through a pay-per-call x402 API at $0.02/call, supporting up to 40K input tokens and 4K output tokens.

## Facts

- Endpoint: POST https://payforapi.com/v1/chat/gpt-5.6-sol
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saymon-ru-data-api-openai-gpt-5-6-sol-chat-anymodel-594a9879
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uAXy8otM4ldjautjS4n82

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 saymon-ru-data-api-openai-gpt-5-6-sol-chat-anymodel-594a9879 -d '<json body>'
```

Example prompt: Use the GPT-5.6 Sol chat endpoint to answer this question with up to 512 tokens: 'What are the top 3 recent breakthroughs in quantum computing?'

## When to prefer this

Choose this endpoint when you need a capable GPT-5.6 Sol LLM response without a monthly subscription, paying only $0.02 per call via x402 micropayment. Ideal for sporadic or agent-driven LLM calls in Russian-language or global workflows where per-call billing fits better than flat-rate pricing. Prefer over Claude Opus 5 sibling when cost matters more than maximum reasoning depth.

## Known failure modes

- Exceeds 40K input token limit — request rejected
- max_tokens set above 4096 — capped or rejected
- Missing required 'messages' field — validation error
- Payment not included or insufficient — x402 payment required error
- Model temporarily unavailable — upstream provider error
- Malformed message role (not system/user/assistant) — schema validation failure

## How this service works

PAYFORAPI.com — окно между ру-рынком и глобальным x402. Глобальный провайдер: твой эндпоинт платят агенты из СНГ. Ру-провайдер: твой сервис — на мировой витрине. Локализация, продвижение, платежи USDC — наша работа.

## Output

Returns an OpenAI-compatible JSON chat completion object containing the assistant's generated message, finish reason (e.g. 'stop'), model identifier ('cx/gpt-5.6-sol'), and token usage breakdown (prompt tokens, completion tokens, total tokens).

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-123",
  "model": "cx/gpt-5.6-sol",
  "usage": {
   "total_tokens": 3270,
   "prompt_tokens": 3150,
   "completion_tokens": 120
  },
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "1) Quantum computing advances...\n2) ...\n3) ..."
    },
    "finish_reason": "stop"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saymon-ru-data-api-openai-gpt-5-6-sol-chat-anymodel-594a9879/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payforapi.com](https://www.zero.xyz/host/payforapi.com/llms.txt)