# eXcalibur MCP

> eXcalibur MCP — lonniev-excalibur-mcp. Use this tool when you need to create and publish engaging tweets with images and optional monetization through Bitcoin Lightning micropayments. It solves the problem of securely and easily posting richly formatted content to Twitter, handling authentication and payment processing. The eXcalibur MCP tool takes in formatted tweet content and images as input and outputs a securely published tweet, utilizing OAuth2 PKCE and Nostr identity for authentication.

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

## Description

Enables AI agents to post richly formatted tweets to X (Twitter) with optional images, monetized via Bitcoin Lightning micropayments and secured with OAuth2 PKCE, Nostr identity, and encrypted credential vaulting.

## Trust

- **Trust score (0–1):** 0.68
- **Verification tier:** scanned
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** social-media
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/gmsl6cbv8q)
- **Repository:** <https://github.com/lonniev/excalibur-mcp>

## 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": "lonniev-excalibur-mcp"
    }
  }
}
```

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