How to Connect Semgrep Remote MCP to ChatGPT

Add Semgrep's remote MCP server to ChatGPT in about a minute.

๐Ÿ›ก๏ธ Officialโœ“ VerifiedHTTP + SSEPublic ยท No Authยทhttps://mcp.semgrep.ai/mcp

Step-by-step

  1. Open ChatGPT connector settings
    Settings โ†’ Connectors โ†’ enable Developer Mode โ†’ Add custom connector.
  2. Paste the endpoint
    URL: https://mcp.semgrep.ai/mcp. No authentication needed โ€” Semgrep MCP is public.
  3. Verify
    Verify in the browser: paste https://mcp.semgrep.ai/mcp into remotemcp.net/inspector and run initialize + tools/list.

Troubleshooting OAuth / 401

  • A 401 Unauthorized on first connect is normal โ€” the endpoint is OAuth-protected; let ChatGPT 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.
HTTP + SSEhttps://mcp.semgrep.ai/mcp
Legacy SSE endpoint
SSEhttps://mcp.semgrep.ai/sse
  1. Open Settings โ†’ Connectors (Integrations) โ†’ Add Custom Connector.
  2. Paste the endpoint URL: https://mcp.semgrep.ai/mcp
  3. No authentication needed โ€” tools are available immediately.
๐Ÿ”ฌ Test Live in Online Inspector๐Ÿ” Audit OAuth 2.1 Config

Tools exposed by Semgrep MCP (3)

ToolSafetyDescriptionParameters
semgrep_scan๐ŸŸข ReadScan a code snippet with Semgrep rules and return findings.code*: stringlanguage: string
security_check๐ŸŸข ReadRun a security-focused check over provided code files.codeFiles*: arrayconfig: string
get_abstract_syntax_tree๐ŸŸข ReadReturn the abstract syntax tree Semgrep builds for a code snippet.code*: stringlanguage: string

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