How to Connect Semgrep Remote MCP to Claude
Add Semgrep's remote MCP server to Claude in about a minute.
Step-by-step
- Open connector settingsClaude.ai โ Settings โ Connectors (Integrations) โ Add Custom Connector (paid plans).
- Paste the endpointURL:
https://mcp.semgrep.ai/mcp. No authentication needed โ Semgrep MCP is public. - Claude Desktop alternativeStdio clients can bridge via
npx -y mcp-remotehttps://mcp.semgrep.ai/mcp`inclaude_desktop_config.json`.
Troubleshooting OAuth / 401
- A
401 Unauthorizedon first connect is normal โ the endpoint is OAuth-protected; let Claude finish the browser consent flow. - If the consent window never opens, remove and re-add the server, then retry.
- Check the exact challenge at our OAuth debugger.
- Run the live endpoint through the online inspector to see the raw JSON-RPC exchange.
Legacy SSE endpoint
Or add to ~/.cursor/mcp.json:
{
"mcpServers": {
"semgrep": {
"url": "https://mcp.semgrep.ai/mcp"
}
}
}claude mcp add --transport http semgrep https://mcp.semgrep.ai/mcp
Or add to .vscode/mcp.json:
{
"servers": {
"semgrep": {
"type": "http",
"url": "https://mcp.semgrep.ai/mcp"
}
}
}- Open Settings โ Connectors (Integrations) โ Add Custom Connector.
- Paste the endpoint URL:
https://mcp.semgrep.ai/mcp - No authentication needed โ tools are available immediately.
Bridge the remote endpoint into stdio with mcp-remote in claude_desktop_config.json:
{
"mcpServers": {
"semgrep": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://mcp.semgrep.ai/mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json:
{
"mcpServers": {
"semgrep": {
"serverUrl": "https://mcp.semgrep.ai/mcp"
}
}
}Tools exposed by Semgrep MCP (3)
| Tool | Safety | Description | Parameters |
|---|---|---|---|
| semgrep_scan | ๐ข Read | Scan a code snippet with Semgrep rules and return findings. | code*: stringlanguage: string |
| security_check | ๐ข Read | Run a security-focused check over provided code files. | codeFiles*: arrayconfig: string |
| get_abstract_syntax_tree | ๐ข Read | Return the abstract syntax tree Semgrep builds for a code snippet. | code*: stringlanguage: string |
Connect Semgrep MCP to another client
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