# Integration Surfaces

URL: https://docs.nexart.io/docs/integration-surfaces

Compare NexArt integration surfaces: the Node API, the CLI, the n8n nodes, and the LangChain integration, with guidance on when each surface is the right.

## Overview

NexArt can be accessed through several surfaces depending on your use case. This page lists them all in one place.

## Node API

The primary integration point for most builders. Two endpoints are available:

- POST /v1/cer/ai/certify creates a CER (`bundleType: "cer.ai.execution.v1"`), attests it, and returns a signed receipt with a verification URL. Recommended for most integrations.
- POST /v1/cer/ai/create creates a CER bundle without attestation. Useful if you want the bundle for your own records or plan to attest it separately.

Authentication uses an API key passed as a Bearer token (`NEXART_API_KEY`).

See the API reference

## Public Verifier

verify.nexart.io is the public verification portal. Verification is always keyed on the certificate hash (the cryptographic identity of the CER):

- Certificate hash: `https://verify.nexart.io/c/sha256%3A7f83...` (illustrative)
- Project hash: `https://verify.nexart.io/p/{projectHash}`

Execution ID is an application-level identifier used to locate or group records; it MUST NOT be treated as the cryptographic identity of a CER, and public verification URLs are not keyed on it.

The verifier uses a redacted, public-safe representation of the record. Sensitive input and output content is not exposed. Verification checks bundle integrity, node signature, and receipt consistency.

Learn about verification

## Attestation Node

The attestation node signs CERs and issues receipts. Its public surfaces are:

- node.nexart.io shows the node's identity and status.
- `node.nexart.io/.well-known/nexart-node.json` publishes Ed25519 signing keys (using `kid` and `activeKid` fields) for independent verification.

See the attestation node docs

## n8n Integration

The NexArt n8n community node allows you to certify AI execution results inside n8n workflows. The node calls `POST /v1/cer/ai/certify` and returns a `verificationUrl` that can be stored or shared.

See the n8n integration docs

## NexArt CLI

The command-line interface for creating, certifying, and verifying CERs, plus deterministic rendering. As of v0.7.0, `nexart ai verify` accepts both raw CER bundles and CER packages.

Install and run with:

`npx @nexart/cli --help`See the CLI docs

## SDKs

- AI Execution SDK for CER creation and attestation workflows.
- CodeMode SDK for deterministic generative execution.
- UI Renderer SDK for deterministic UI rendering.