API Tools

mcp.build

mcp.build is a platform that hosts open-source MCP servers to let AI agents send emails and call APIs instantly without deployment or configuration.

2 endpoints1 known toolsFirst detected September 2, 2026Last detected September 2, 2026

ENDPOINT 1

https://next.hal9.ai/mcp/mcpbuild/send-email

Auth required

Known tools 0

No tool metadata was available in the registry cache.

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.mcp-build]
url = "https://next.hal9.ai/mcp/mcpbuild/send-email"
enabled = true
bearer_token_env_var = "MCP_BEARER_TOKEN"

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Code

.mcp.json

{
  "mcpServers": {
    "mcp-build": {
      "type": "http",
      "url": "https://next.hal9.ai/mcp/mcpbuild/send-email",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Desktop

Settings → Connectors → Add custom connector

Name: mcp-build
Remote MCP URL: https://next.hal9.ai/mcp/mcpbuild/send-email

Add the URL as a custom connector, then complete its supported authorization flow. Claude Desktop remote connectors are configured in the UI.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-build": {
      "url": "https://next.hal9.ai/mcp/mcpbuild/send-email",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Visual Studio Code

.vscode/mcp.json

{
  "servers": {
    "mcp-build": {
      "type": "http",
      "url": "https://next.hal9.ai/mcp/mcpbuild/send-email",
      "headers": {
        "Authorization": "Bearer ${input:mcp-token}"
      }
    }
  },
  "inputs": [
    {
      "type": "promptString",
      "id": "mcp-token",
      "description": "mcp-build bearer token",
      "password": true
    }
  ]
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Generic MCP

Client-specific MCP configuration

{
  "name": "mcp-build",
  "transport": "streamable-http",
  "url": "https://next.hal9.ai/mcp/mcpbuild/send-email",
  "headers": {
    "Authorization": "Bearer YOUR_BEARER_TOKEN"
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

ENDPOINT 2

https://next.hal9.ai/mcp/mcpbuild/run-python

No auth detected

MCP server metadata

Name: hal9/mcpbuild/run-python
Version: 1

Capabilities

tools

Server instructions

Run Python code from natural language prompts, with optional PyPI package install

Known tools 1

chat

Run Python code from natural language prompts, with optional PyPI package install

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.hal9-mcpbuild-run-python]
url = "https://next.hal9.ai/mcp/mcpbuild/run-python"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "hal9-mcpbuild-run-python": {
      "type": "http",
      "url": "https://next.hal9.ai/mcp/mcpbuild/run-python"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: hal9-mcpbuild-run-python
Remote MCP URL: https://next.hal9.ai/mcp/mcpbuild/run-python

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "hal9-mcpbuild-run-python": {
      "url": "https://next.hal9.ai/mcp/mcpbuild/run-python"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "hal9-mcpbuild-run-python": {
      "type": "http",
      "url": "https://next.hal9.ai/mcp/mcpbuild/run-python"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "hal9-mcpbuild-run-python",
  "transport": "streamable-http",
  "url": "https://next.hal9.ai/mcp/mcpbuild/run-python"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.