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x402engine GPT-6 Astra LLM API
x402
x402engine GPT-6 Astra LLM API is a paid API for AI agents from x402engine.app, paid per call via x402, $0.17296/call, status unknown (last checked 2026-10-27).
Calls OpenAI's GPT-6 Astra flagship model via pay-per-call micropayment for advanced reasoning, software engineering, deep research, and long-horizon document creation tasks.
Price / call$0.17296
Success—
StatusUnknown
How this service works
GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon
Output
Returns the GPT-6 Astra model's generated text response, which may include long-form prose, code, structured analysis, or reasoning chains depending on the prompt. The response follows standard LLM completion output format with the model's answer to the provided messages or prompt.
Example use cases
Deep scientific literature synthesis
“I need GPT-6 Astra to read through this set of research abstracts and synthesize a comprehensive review of the current state of CRISPR gene editing for sickle cell disease, highlighting gaps and open questions.”
End-to-end software engineering task
“Can you use GPT-6 Astra to design and write a full Python implementation of a rate-limited async job queue using Redis, including unit tests and a README?”
Long-horizon business strategy report
“Use the most capable OpenAI model to produce a 3,000-word market entry strategy for a B2B SaaS company expanding into Southeast Asia, covering regulatory, competitive, and go-to-market dimensions.”
Technical details
Endpoint
POSThttps://x402engine.app/api/llm/gpt-6-astra?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need OpenAI's most capable flagship model (GPT-6 Astra) for demanding tasks requiring long-horizon reasoning, complex software engineering, deep research synthesis, or large-scale document creation — and you want pay-per-call pricing via x402 micropayments without a subscription. Prefer this over lighter models when task complexity is high, output length is significant, or multi-step agentic reasoning is required.
Side effects
- Payment failure if USDC micropayment is not properly attached via x402 protocol, resulting in HTTP 402
- Prompt too long for context window resulting in truncation or error
- Model unavailable or rate-limited on the underlying OpenAI infrastructure
- Malformed request body causing 400-level error
- Timeout for extremely long generation tasks exceeding server limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "openai/gpt-6-astra",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Hello!"
},
"finish_reason": "stop"
}
],
"content": "Hello!"
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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