NexArt

What is NexArt?

NexArt turns an AI execution into a Certified Execution Record: portable, cryptographically sealed, independently verifiable evidence of what ran, on which inputs, by which system.

What NexArt does

A lightweight SDK records selected inputs, parameters, outputs, and execution context at runtime and seals them into a tamper-evident Certified Execution Record. The attestation node checks and signs the record. A third party can verify integrity with the record, the signature, and the node public key. Confidential mode can replace raw inputs and outputs with cryptographic commitments, and the node does not see raw content in that mode. A verified record proves that specific inputs produced specific outputs at a specific time. It does not prove the output was correct, fair, lawful, appropriate, or complete. Completeness depends on the integration and the capture boundary.

Who NexArt is for

Engineers and auditors, and teams dealing with customer disputes, audit requests, incident investigation, regulated workflows, and compliance review.

How NexArt works

The AI system runs a model call, tool call, or automated decision. The SDK captures inputs, outputs, and execution context and seals them locally. The attestation node can certify the record with an Ed25519 receipt over the certificate hash, and an external timestamp where that timestamp is available. Anyone can verify the record at verify.nexart.io with no account, no login, and no API key. Project Bundles group multiple execution steps into one artifact. The SDK is not the node, and local sealing is not certification.

Key features

• Local sealing creates a tamper-evident record inside the system. Local sealing is not certification.
• Certification adds an Ed25519 attestation signature and, where available, an external timestamp. The node does not see raw content in confidential mode.
• Confidential execution can replace raw inputs and outputs with cryptographic commitments.
• verify.nexart.io checks a record with no account. It does not display analytics, logs, or system health.
• Quotas are enforced at the account level and shared across API keys. Additional API keys do not increase the monthly limit.
• SDK, CLI, local execution, local CER generation, and independent verification are not a charge. Paid plans add independent certification.
• Records can support evidence relevant to the EU AI Act, ISO/IEC 42001, SOC 2, and NIST AI RMF. NexArt does not itself make a system compliant.

Pricing

As listed on nexart.io, checked 13 October 2026. Prices can change; see the site for current terms.

• Free is $0, with 100 certified runs per month, up to 2 active API keys, full SDK and CLI access, a shared attestation node, and a hard cap with no surprise bills.
• Pro is $6,000/year, with 5,000 certified runs per month, up to 5 active API keys, commercial CodeMode, priority attestation access, and email support.
• Team is $18,000/year, with 50,000 certified runs per month, up to 10 active API keys, multiple environments, a priority queue, and team-level key management.
• Enterprise is from $50,000/year, with custom limits by contract, a private or dedicated attestation node, audit retention, independent key governance, and SLAs plus an architecture review.
• Annual includes a 2 month discount. Execution is always free. Paid plans add independent certification via the attestation node.

Facts from nexart.io, checked 13 October 2026

• NexArt was founded by Jeremy Bouedo. The legal entity is Artnames ltd, the jurisdiction is the United Kingdom, and it was founded in September 2025.
• When a buyer accepts terms on HAGGIN, the page says NexArt seals the acceptance as a public timestamped record that holds a fingerprint of the terms, never the terms themselves.
• Hosted verification uses verify.nexart.io with no account. Independent verification can use the CLI, the SDK, or standard cryptographic libraries, with no live NexArt service required.

Written from NexArt's own website (Homepage, Pricing, Features, About). The maker can claim this listing to edit it.