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imgnAI Katana API – Claude Opus 4.8 Text Completion
x402
imgnAI Katana API – Claude Opus 4.8 Text Completion is a paid API for AI agents from kat.imgnai.com, paid per call via x402, $0.052/call, status unknown (last checked 2026-09-15).
Pay-per-call text completion endpoint using Anthropic's Claude Opus 4.8 model via the imgnAI Katana AI gateway, billed at $0.05425 USDC per call over x402.
Price / call$0.052
Success—
StatusUnknown
How this service works
Pay-per-call AI gateway: Frontier/SOTA LLM, Image, and Video models - and proprietary low-cost imgnAI models. Includes GPT 5.5, Opus 4.8, GPT Image 2, Nano Banana 2, Seedance 2.0, Happy Horse, and Google Omni. Fully compatible with OpenAPI, HermesOS, and OpenClaw.
Output
Returns an OpenAI-compatible response object with a 'choices' array containing the model's generated text, along with a 'usage' object detailing token counts for the request and response.
Example use cases
Example prompt
“Use the Katana gateway's Claude Opus 4.8 endpoint to answer this question with up to 1024 tokens and a temperature of 0.7: 'Explain the key differences between transformer and mamba architectures for sequence modeling.'”
Technical details
Endpoint
POSThttps://kat.imgnai.com/v1/text/claude-opus-48When to prefer
Choose this endpoint when you need Claude Opus-level reasoning quality on a per-call basis without committing to an Anthropic subscription, especially in agentic workflows that support x402 USDC micropayments and OpenAI-compatible API schemas.
Side effects
- Payment failure: x402 payment not processed or insufficient USDC balance
- Invalid messages array: missing required 'messages' field returns 400 error
- Model unavailable: upstream Anthropic service disruption causes 503
- Rate limiting: too many concurrent requests results in 429
- Malformed request body: incorrect JSON schema returns 400 validation error
- Context length exceeded: messages exceed Claude Opus 4.8 context window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| messagesrequired | array |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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