Semgrep MCP alternatives
Semgrep's official server scans code for security vulnerabilities from your editor: semgrep_scan and semgrep_scan_with_custom_rule run static analysis, semgrep_scan_supply_chain checks dependencies, and semgrep_findings pulls results from the AppSec Platform. It is static analysis on source, run before code ships.
The alternatives here split into two groups. Snyk is the true peer, scanning code and dependencies for the same class of issue. The rest, infra and observability servers, are what teams reach for when the question shifts from "is this code safe" to "what is this running system doing," so they are honestly adjacent rather than drop-in replacements.
The 8 best alternatives
Snyk is the direct peer: built into the Snyk CLI, it scans open-source dependencies, code, containers, and IaC for vulnerabilities right where you write code, with snyk_code_scan and snyk_sca_scan covering Semgrep's core ground.
Set up Snyk →AWS Labs' server runs any AWS CLI command with validation and a read-only mode, so an agent can inspect cloud configuration and posture. It checks the deployed environment, a different layer from Semgrep's source scanning.
Set up AWS (AWS Labs) →Cloudflare's remote servers build and manage Workers, KV, R2, D1, and Hyperdrive. They touch the edge and WAF surface rather than your source, so reach for it for runtime configuration, not code analysis.
Set up Cloudflare →For watching a running system instead of scanning code, Grafana queries dashboards, Prometheus, Loki, incidents, and alerts. It answers what is happening in production, which Semgrep never sees.
Set up Grafana →Sentry pulls issues, stack traces, and events and runs Seer root-cause analysis. It catches faults after deploy where Semgrep catches risky patterns before, so the two cover opposite ends of the same pipeline.
Set up Sentry →Prometheus runs PromQL instant and range queries, discovers metrics, and inspects scrape targets. It is purely runtime metrics, useful alongside a scanner but not a substitute for static analysis.
Set up Prometheus →SigNoz gives full access to traces, logs, metrics, dashboards, and alerts in an OpenTelemetry-native stack. Like the other observability picks, it monitors behaviour rather than inspecting source for vulnerabilities.
Set up SigNoz →PagerDuty exposes incidents, services, schedules, and orchestrations across 64 tools, read-only by default. It manages response when something breaks, the operational counterpart to catching issues in code.
Set up PagerDuty →
How to choose
If you want what Semgrep does, scan source and dependencies for vulnerabilities, Snyk is the one real alternative and it adds container and IaC scanning. Everything else here, AWS, Cloudflare, Grafana, Sentry, Prometheus, SigNoz, and PagerDuty, watches or runs the deployed system rather than analyzing code, so they complement a scanner rather than replace it. Pick by which half of the lifecycle you are securing.
FAQ
- What is the closest alternative to the Semgrep MCP server?
- Snyk. It scans code and open-source dependencies for vulnerabilities from where you write code, the same job as Semgrep, and adds container, IaC, and SBOM scanning. The other servers here monitor running systems rather than analyzing source, so Snyk is the only true peer in this list.
- Can any of these scan infrastructure as code or containers?
- Snyk does, through snyk_iac_scan and snyk_container_scan, alongside its dependency and code scanning. Semgrep itself focuses on source and supply-chain analysis. The observability servers do not scan artifacts at all; they query a system that is already running.