# Cersei

> Use this tool when you need to build AI-powered coding agents in Rust that interact with the MCP ecosystem. Cersei solves the problem of connecting autonomous coding agents to external MCP servers, enabling them to consume MCP services through a JSON-RPC 2.0 interface. It takes MCP server connections as input and outputs a managed interface for agents to interact with the MCP ecosystem.

Canonical page: https://skillsregistry.net/skills/cersei-mcp  
JSON: https://api.skillsregistry.net/v1/skills/cersei-mcp

## Description

Cersei is a Rust SDK for building AI-powered coding agents. It includes a cersei-mcp crate that provides a JSON-RPC 2.0 MCP client with stdio transport, allowing agents to connect to and consume external MCP servers through a McpManager interface. Designed for developers building autonomous coding agents in Rust that need to interact with the MCP ecosystem.

## Trust

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

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-05-26

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/cersei-mcp)
- **Repository:** <https://github.com/pacifio/cersei>

## 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": "cersei-mcp"
    }
  }
}
```

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

---
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