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Saymon RU Data API — Claude Opus 5 LLM Chat
x402
Saymon RU Data API — Claude Opus 5 LLM Chat is a paid API for AI agents from payforapi.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Provides pay-per-call access to Anthropic Claude Opus 5 via an OpenAI-compatible chat endpoint, accepting up to 40K input tokens and returning up to 4K output tokens for $0.05 per call.
Price / call$0.05
Success—
StatusUnknown
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 response containing the assistant's generated text message, token usage breakdown (prompt, completion, total tokens), a finish reason (e.g. 'stop'), message ID, and the model identifier. The content field holds the raw text output from Claude Opus 5.
Example use cases
Complex reasoning for agent pipeline
“I need Claude Opus 5 to reason through this multi-step legal contract clause and tell me what the liability implications are — send it the full clause as the user message and return its analysis.”
Multilingual content drafting
“Ask Claude Opus 5 to write a professional Russian-language email declining a business proposal politely but firmly, around 200 words.”
Code explanation and review
“Send this Python async function to Claude Opus 5 and ask it to explain what it does, identify any bugs, and suggest improvements — keep the output concise.”
Technical details
Endpoint
POSThttps://payforapi.com/v1/chat/claude-opus-5When to prefer
Choose this endpoint when you need access to Anthropic's Claude Opus 5 — one of the highest-capability LLMs available — on a pay-per-call basis without a subscription, particularly for agent pipelines that require top-tier reasoning, complex instruction-following, or nuanced text generation. Prefer it over cheaper tiers when task quality matters most, and over self-hosted alternatives when you want zero infrastructure overhead. The x402 micropayment model makes it ideal for sporadic or low-volume agent calls.
Side effects
- Input exceeds ~40K token limit — request rejected or truncated
- max_tokens set above 4096 — validation error
- Malformed messages array (missing role or content fields) — schema validation error
- Payment failure or insufficient USDC balance — 402 Payment Required
- Model temporarily unavailable — upstream provider error
- Temperature out of valid range — parameter error
Output
Schema · Response
{
"type": "json",
"example": {
"id": "msg_abc",
"model": "cc/claude-opus-5",
"usage": {
"total_tokens": 9095,
"prompt_tokens": 9050,
"completion_tokens": 45
},
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "EIP-3009 lets a user authorize a transfer of USDC with a signed message..."
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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