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Xona Prova Verified Inference (TEE-Attested Chat Completions)
x402
Xona Prova Verified Inference (TEE-Attested Chat Completions) is a paid API for AI agents from api.xona-agent.com, paid per call via x402, $0.0014/call, status unknown (last checked 2026-09-29).
Runs LLM chat completions inside a Trusted Execution Environment (TEE) with hardware attestation and anchors each response as an on-chain proof on Solana, returning a Solscan link.
Price / call$0.0014
Success—
StatusUnknown
How this service works
Verified inference (Prova). OpenAI-compatible chat completions run inside a TEE (NVIDIA + Intel), hardware-attested, and anchored on Solana — every response returns an on-chain proof + Solscan link. Select a model via the body `model` field; price varies by tier (standard/premium/flagship).
Output
An OpenAI-compatible chat completion response plus a hardware attestation proof and a Solscan link confirming the response was anchored on Solana, providing cryptographic verifiability of the inference.
Example use cases
Example prompt
“Using the Prova verified inference endpoint, run deepseek-v4-pro with a temperature of 0.7 and max 512 tokens to answer: 'Summarize the key risks of smart contract auditing' — I need the Solana on-chain proof link alongside the response.”
Technical details
Endpoint
POSThttps://api.xona-agent.com/llm/prova?utm_source=zero.xyzWhen to prefer
Choose this endpoint when verifiability, auditability, or tamper-proof proof of AI inference matters — e.g. compliance workflows, AI-generated legal or financial content, or any use case where you need to prove the exact model and output via a Solana on-chain record. Not needed for standard LLM calls where attestation is irrelevant.
Side effects
- Invalid or unsupported model ID returns 400 with list of valid models
- Payment failure or insufficient USDC returns 402 Payment Required
- TEE attestation failure returns 500 with attestation error detail
- Prompt or messages missing returns 422 validation error
- Token limit exceeded returns 400 with max_tokens constraint
- Model tier unavailable returns 503 with retry guidance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Model id (price varies by tier). One of: deepseek-v4-flash, gpt-oss-20b, qwen-2.5-7b, qwen3.5-27b, qwen3.6-27b, qwen3-vl-30b, gpt-oss-120b, gemma-4-31b, qwen3.5-122b, kimi-k2.6, glm-5.2, deepseek-v4-pro |
| prompt | string | The user prompt (or use messages) |
| messages | array | Optional OpenAI-style messages array (overrides prompt/system_prompt) |
| max_tokens | number | Optional cap on output tokens |
| temperature | number | Optional sampling temperature |
| system_prompt | string | Optional system prompt |
Tags
x402
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