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Ausca

Ausca is an MCP server that adds web browsing tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts. It has 40 GitHub stars, is released under the MIT license and runs locally with npx -y ausca.

github.com/auscahq/ausca (opens in a new tab)

Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error

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Install Ausca

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "ausca": {
      "command": "npx",
      "args": [
        "-y",
        "ausca"
      ],
      "env": {
        "AUSCA_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --env AUSCA_PRIVATE_KEY=your-value --transport stdio ausca -- npx -y ausca

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "ausca": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "ausca"
      ],
      "env": {
        "AUSCA_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "ausca_private_key",
      "description": "AUSCA_PRIVATE_KEY",
      "password": true
    }
  ],
  "servers": {
    "ausca": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "ausca"
      ],
      "env": {
        "AUSCA_PRIVATE_KEY": "${input:ausca_private_key}"
      }
    }
  }
}

Claude Code (remote)

claude mcp add --transport http ausca "https://ausca.com/mcp"

The same server is also hosted as a remote MCP endpoint, so nothing runs on your machine.

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

Environment variables

Variables the server reads at startup.

NameRequiredDescription
AUSCA_PRIVATE_KEYsecretNoOptional local wallet key for paid tools. Discovery and artifact commit remain keyless.
AUSCA_MAX_PAYMENT_USDNoRequired positive per-call USD cap whenever AUSCAPRIVATEKEY is configured.

About Ausca

Pay-per-call APIs and MCP services for AI agents: document OCR, document analysis, media transcription, remote browser sessions, and agent email inboxes. No account, no API keys; USDC on Base per call, a signed receipt for every completed invocation.

  • mcp
  • python
  • typescript
  • x402
  • ai-agents
  • base
  • browser-automation
  • document-analysis
  • email
  • mcp-server

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FAQ

Ausca FAQ

Still curious? Email info@appsgit.com.

How do I install the Ausca MCP server?

Add the command npx -y ausca to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Ausca free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is Ausca actively maintained?

The most recent commit was on Oct 25, 2026. appsgit only lists MCP servers with a commit in the last six months.