> ## Documentation Index
> Fetch the complete documentation index at: https://docs.neus.network/llms.txt
> Use this file to discover all available pages before exploring further.

# MCP journeys

> Real assistant workflows — verify before action, reuse receipts, portable context, trusted agents, vault, and agentic payments.

After `neus setup` and `neus check`, ask your assistant to use NEUS in plain language. It reports the result as **Passed**, **Action needed**, or **Blocked** instead of showing raw tool output.

When you are signed in, account-based tools use your current profile automatically.

## Verify before a sensitive action

The default workflow reuses a valid receipt when one fits and runs a new check only when needed.

**Try:** "Use NEUS Verify before taking sensitive actions."

```txt theme={"dark"}
NEUS Verify: Passed. Requirement satisfied. Receipt on file. Next: Continue.
```

If nothing on file covers the request:

```txt theme={"dark"}
NEUS Verify: Action needed. Missing: Sign-in. Next: Complete the secure step, then retry.
```

## Show your trust receipts

Pull the receipt URL, status, tags, or summary behind any prior check.

**Try:** "Show my trust receipts for identity checks."

## Reuse portable context

Tagged receipts carry prior instructions, rules, or session references — so your assistant picks up where you left off without re-asking. Optional linking patterns: [Receipt links and versioning](../learn/receipts-as-knowledge).

**Try:** "Use my NEUS context from prior receipts before asking me again."

## Trust an agent before it runs tools

Confirm an agent has both identity and approved authority before it acts.

**Try:** "Verify this agent is trusted before it runs tools."

```txt theme={"dark"}
NEUS Verify: Blocked. A required trust condition was not satisfied. Next: Do not continue until the check passes.
```

When setup is missing, the assistant guides identity + delegation, then re-checks until the agent is linked. See [Agent verification flow](../agents/agent-verification-flow).

## Pay per call within a cap

With a `payments:x402` delegation and a `maxSpend` cap, an agent can settle metered calls on its own — and is refused past the cap.

**Try:** "Pay for this API call with my x402 delegation, up to the cap."

Details: [x402 pay-per-call](../platform/x402).

## Store and use secrets safely

Keep tokens in encrypted Vault instead of pasting them into chat.

**Try:** "Use NEUS Vault before storing or using secrets."

Details: [Secrets](./secrets).

***

Tool reference: [MCP tools](./tools) · Install: [Install NEUS](../install)