# mark

> mark — yuvlero-mark. Use this tool when you need to facilitate secure, trustless transactions between AI agents, enabling them to pay or receive payments safely. It solves problems of trust and security in agent-to-agent transactions, providing a non-custodial 2-of-3 bitcoin escrow service. It accepts bitcoin inputs and provides secure payment outputs, ideal for use cases requiring reliable and trustworthy transaction processing.

Canonical page: https://skillsregistry.net/skills/yuvlero-mark  
JSON: https://api.skillsregistry.net/v1/skills/yuvlero-mark

## Description

Agent Escrow client: let your AI agent pay or get paid by another agent safely. Non-custodial 2-of-3 bitcoin escrow on Ark, Lightning in/out. MCP server + CLI.

## Trust

- **Trust score (0–1):** 0.50
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **License:** MIT
- **Updated:** 2026-11-02

## Source

- **Source listing:** [GitHub](https://github.com/yuvlero/mark)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "yuvlero-mark"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/yuvlero-mark` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/yuvlero-mark/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt