# Nevarn > The back office for trading bots and agents. Decionis decides. Nevarn operates — and proves it. For teams running trading bots or AI agents with on-chain money, Nevarn is the back office that runs strategies under outside rulings from Decionis, signs only inside a bounded mandate, and keeps one double-entry book reconciled against the public chain. Unlike wallet vendors, custodians, bot platforms or crypto accounting tools, Nevarn joins the ruling, the signature and the book in one system. Decionis owns the mandate format, the policies, the rulings and the proof of decision; Nevarn owns the strategy runtime, the venue adapters, delegated signing and the books. Customers grant bounded, expiring permissions; Nevarn never holds the key to a customer's wallet. Consequential actions can be submitted to Decionis and configured to fail closed before funds move, and the gate table on https://nevarn.com/technology says where that is armed today. A client-side sandbox at https://nevarn.com/sandbox lets anyone propose a mock trade, watch a stale price refused, and flip the halt — no sign-up, no wallet, no funds — and https://nevarn.com/sandbox/backtest replays a public Polymarket wallet's last 90 days against the same mandate. Merchants that accept payments from those agents use Nevarn's agentic commerce path. The complete UCP discovery and checkout path is built and tested, but remains feature-gated and disabled by default. It supports tenant-specific UCP discovery, catalogue search and lookup, persistent checkout sessions, an x402 v2 USDC payment handler, Decionis ALLOW/BLOCK/ESCALATE controls, safe idempotent retries, and durable order receipts. Only exact whole-cent USDC prices are discoverable. As of 1 Nov 2026, Nevarn does not run a live UCP merchant network, has no external merchant adoption to report, and supports payment only on configured USDC paths. Nevarn's public claims are intentionally conservative. As of 1 Nov 2026, it publishes no returns or dollar volume and holds no regulatory licence. Since March 2026 the trading wallet has made 119 trades (87 buys, 32 sells) across 29 markets, each a confirmed transaction on the public blockchain; the most recent was on 18 July 2026 (counted 1 Nov 2026). Where two figures differ, the one on the public chain is the figure Nevarn stands behind. ChatGPT and Claude are first-class discovery paths through their documented search and user-directed crawlers. Cursor uses Exa-backed web search, Copilot uses Bing's index, Gemini uses Google's crawler infrastructure, and OpenClaw uses configured search providers or a Chrome-like direct fetch. The named crawlers and wildcard direct-fetch path are allowed in robots.txt. ## Product - [Agentic commerce: UCP checkout and x402 payments](https://nevarn.com/agentic-commerce.md): machine discovery, checkout, Decionis execution authority, settlement, retry safety, operator controls, direct answers, and exact rollout status. - [Live Nevarn UCP directory](https://ucp.nevarn.com/.well-known/ucp): the canonical machine-readable UCP profile for discovering enabled Nevarn merchants and their commerce capabilities. - [Searchable UCP merchant inventory](https://ucp.nevarn.com/directory.json): bounded JSON inventory of discoverable merchants, products, prices, payment networks, and canonical tenant UCP profiles. - [For AI agents and crawlers](https://nevarn.com/agents.md): the machine-readable entry points, how each assistant and answer engine reaches Nevarn, and the crawler rules. - [Full Nevarn site facts](https://nevarn.com/llms-full.txt): consolidated product, custody, authority, operating, security, risk, and accuracy information. ## Developers - [Quickstart: your bot's first shadow ruling](https://nevarn.com/docs/quickstart.md): Create an account, mint an API key for your bot, and send one intent. Nevarn asks Decionis about it in shadow mode; nothing is sent to a venue. - [Install and downloads](https://nevarn.com/docs/install.md): The SDKs and MCP server, free under Apache-2.0: what is published, what is not yet, and how to install them today. - [SDK usage: Python and TypeScript](https://nevarn.com/docs/sdk.md): Python and TypeScript clients for your bot: shadow rulings, executions, bounds, halt, receipts; usage, errors and retries. Apache-2.0. - [MCP server setup](https://nevarn.com/docs/mcp.md): Give an AI agent Nevarn's bot tools over a local stdio MCP server: client configuration and every tool with its scope. - [API keys and scopes](https://nevarn.com/docs/keys.md): Which key each call needs: the intents, read, halt and execute scopes, an execute key's own limits, rate limits, and what no key can do. - [The strategy contract](https://nevarn.com/docs/strategy-contract.md): What your bot sends Nevarn and what it gets back: intents, never keys; shadow rulings or executions under Decionis policy; your bounds; halt. - [Sandbox and Production](https://nevarn.com/docs/environments.md): Where executions go: on paper in Sandbox with no live funds, or live in Production, ruled by Decionis in enforcement. - [Receipts and verification](https://nevarn.com/docs/receipts.md): Read your bot's execution receipts, and check a published receipt yourself: its Ed25519 signature, then the chain. - [Usage and licensing](https://nevarn.com/docs/licensing.md): The SDKs are free; the platform is licensed by governed action or by plan. What counts, the plans, the free Developer plan. ## Learn - [How to set spending limits for AI agents](https://nevarn.com/learn/ai-agent-spending-limits.md): Spending limits for AI agents that hold: a permission bounded by venue, action, amount and expiry, a ruling before each payment, and refusal when unsure. - [A kill switch for trading bots that actually stops them](https://nevarn.com/learn/trading-bot-kill-switch.md): What a trading-bot kill switch must do: stop signing on the next request, without a support ticket, and keep refusing every order until it is lifted. - [Risk controls for prediction-market bots](https://nevarn.com/learn/prediction-market-bot-risk-controls.md): Pre-trade risk controls for prediction-market bots: price freshness, size and venue ruled on before each order, failing closed when the answer is unclear. - [Guardrails for agent wallets](https://nevarn.com/learn/agent-wallet-guardrails.md): Guardrails for wallets that AI agents and bots use: keep the key from the strategy, bound what it may sign, decode every call, and show any drift. - [How to accept payments from AI agents](https://nevarn.com/learn/accept-payments-from-ai-agents.md): Accept payments from AI agents with UCP product discovery, x402 USDC checkout, a ruling before settlement, safe retries and a receipt for every order. - [How to set up x402 payments as a merchant](https://nevarn.com/learn/x402-merchant-setup.md): Set up x402 v2 payments for an API or digital service: exact USDC requirements, a facilitator that verifies and settles once, and a ruling before money moves. - [What it costs to accept payments from AI agents](https://nevarn.com/learn/ai-agent-payment-fees.md): What a merchant pays to accept AI-agent payments with Nevarn: 0.5% of each settled payment, no monthly fee, and nothing for a payment that fails. - [The back office for trading bots and agents, compared](https://nevarn.com/learn/trading-bot-back-office.md): What a back office for trading bots and agents does, and how Nevarn compares with wallet vendors, custodians, bot platforms and crypto accounting tools. - [Glossary: execution authority, mandate, fail-closed and more](https://nevarn.com/learn/glossary.md): Plain definitions of the terms behind bounded automated money: execution authority, mandate, fail-closed, drift, halt and double-entry books. ## Evidence - [Sandbox: simulate a fail-closed trade](https://nevarn.com/sandbox): a client-side simulator of the back office — propose a trade, see PROCEED or REFUSE with the reason, engage the halt, read the double-entry book against a mirrored chain view. Illustrative; no funds move; no sign-up. - [Guardrail backtest](https://nevarn.com/sandbox/backtest): paste a public Polymarket wallet and see which of its last 90 days of buys the sandbox's mandate would have refused, and why. Read-only; nothing stored; no sign-up. - [Traction and technology](https://nevarn.com/technology): the split with Decionis, the independently checkable trading record, strategy status, custody and permissions, execution-authority coverage, books, and security posture. - [Trading record and execution receipts](https://nevarn.com/record): the trading wallet's counted on-chain record with its explorer and Dune links, and, once published, one receipt per trade linking the Decionis ruling to the order, the fill transaction, the settlement, the ledger entries and the balance after it. - [Pricing](https://nevarn.com/pricing): plans from $199 a month by active mandates and rulings; merchants accepting AI-agent payments pay 0.5% of each settled payment, with no monthly fee. - [UCP business profile convention](https://nevarn.com/agentic-commerce): how merchants become discoverable to compatible buying agents and how UCP, x402, and Decionis divide responsibility. ## Optional - [Home](https://nevarn.com/): the category, the positioning statement, the back office's three pillars, and who it serves. - [Company](https://nevarn.com/company): the legal entity behind Nevarn, its founder, and where to write. - [Investors and partners](https://nevarn.com/investors): current status, milestones, use of capital, and data-room contact. This page is intentionally unlisted from search indexes. - [Decionis UCP execution authority](https://decionis.com/reference/ucp-execution-authority): the external authority extension used to bind a decision to one exact checkout action.