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x402engine Grok 4.7 LLM API
x402
x402engine Grok 4.7 LLM API is a paid API for AI agents from x402engine.app, paid per call via x402, $0.028874/call, status unknown (last checked 2026-10-30).
Calls xAI's Grok 4.7 language model via pay-per-call HTTP 402 micropayment for coding, agentic tasks, and knowledge work
Price / call$0.028874
Success—
StatusUnknown
How this service works
x402engine — Grok 4.7 is SpaceXAI's flagship model for coding, agentic tasks, and knowledge work, succeeding Grok 4.6. It is particularly strong at long-running software engineering tasks, verifying its own work, and...
Output
Returns an OpenAI-compatible JSON response with the assistant's generated message content, finish reason, model identifier ('x-ai/grok-4.7'), and optionally tool calls, logprobs, or streamed SSE chunks depending on request flags.
Example use cases
Automated code review and fix
“I have a buggy JavaScript function — send it to Grok 4.7 and ask it to identify the bug, explain what's wrong, and return a corrected version with comments.”
Agentic research with tool calls
“Use Grok 4.7 with my web-search tool definition to research the top 5 open-source vector databases and produce a comparison table — have it call the tool and summarize the results.”
Streaming knowledge Q&A
“Ask Grok 4.7 to explain how transformer attention mechanisms work at a graduate level, and stream the answer back to me as it's generated.”
Technical details
Endpoint
POSThttps://x402engine.app/api/llm/grok-4.7?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need xAI's Grok 4.7 specifically — particularly for long-running software engineering tasks, agentic workflows with tool use, or tasks requiring the model to verify its own output. Prefer it over generic OpenAI-compatible endpoints when Grok's reasoning style or xAI's training data recency is important, and when pay-per-call micropayment (no subscription) is the desired billing model.
Side effects
- Payment not settled — HTTP 402 if USDC micropayment fails
- Invalid messages array — missing required 'role' or both 'content' and 'tool_calls'
- Model timeout on very long agentic tasks
- Unsupported tool call format returns error
- Stream connection drop mid-response
- Rate limiting if too many concurrent requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "x-ai/grok-4.7",
"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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