What's the difference between Pipelock and Docker MCP Gateway?

Docker MCP Gateway runs each MCP server in its own Docker container with resource limits and network isolation. Pipelock is a network proxy that scans the content of HTTP requests, MCP tool calls, and WebSocket frames. Docker controls the container. Pipelock scans the traffic. Container isolation and content scanning solve different problems.

Does Docker MCP Gateway scan for credential leaks or prompt injection?

Docker MCP Gateway includes a --block-secrets flag for secret pattern matching and security features like --verify-signatures and localhost auth tokens. Pipelock's DLP covers 48 credential patterns with base64/hex/URL decoding and scans responses for injection through 6 normalization passes. They focus on different aspects of security.

Can I use Pipelock and Docker MCP Gateway together?

Yes. Docker MCP Gateway handles container isolation, the MCP server catalog, and OAuth. Pipelock handles content scanning for credential leaks, injection, and tool poisoning. They operate at different layers and can complement each other.

Pipelock vs Docker MCP Gateway

The short version

Pipelock is a network proxy that scans HTTP, MCP, and WebSocket traffic for credential leaks, prompt injection, SSRF, and tool poisoning. Single binary, no dependencies.

Docker MCP Gateway runs MCP servers in isolated Docker containers with resource limits, network restrictions, and security controls. Part of Docker’s MCP ecosystem (Catalog + Profiles + Gateway).

Docker gives you container isolation and server management. Pipelock gives you content-level scanning. Container isolation protects the host from a compromised MCP server. Content scanning looks for credential leaks and injection in the traffic flowing through allowed connections.

Feature comparison

Feature	Pipelock	Docker MCP Gateway
Architecture	Network proxy (single binary)	Container-isolated MCP gateway
Dependencies	None (static binary)	Docker runtime
DLP (credential scanning)	48 built-in patterns, encoding-aware, env leak, entropy	`--block-secrets` (pattern matching)
Prompt injection detection	25 patterns, 6-pass normalization	Not documented
Tool poisoning detection	Fingerprint + rug-pull drift detection	Not documented
SSRF protection	DNS rebinding, private IP, metadata blocking	`--block-network`, localhost auth tokens
HTTP forward proxy	Yes (fetch + forward + CONNECT + WebSocket)	No (MCP transport)
WebSocket scanning	Yes (bidirectional frame scanning)	Not documented
Container isolation	No (process-level sandbox)	Yes (per-server, capped resources)
MCP catalog	No	Yes (Docker Desktop integrated)
MCP profiles	No	Yes (shareable OCI artifacts)
OAuth handling	No	Yes (automatic)
Image verification	Binary integrity (Ed25519)	`--verify-signatures`, Docker Content Trust
Kill switch	Yes (4 independent sources)	Not documented
Rate limiting	Yes (per-domain sliding window)	Not documented
Data budgets	Yes (per-domain byte limits)	Not documented
Tamper-evident logging	Yes (hash-chained flight recorder)	Call tracing and logging
Process sandbox	Yes (Landlock + seccomp + netns)	N/A (containers)
Pricing	Free (Apache 2.0)	Included with Docker

Where Docker MCP Gateway is better

Container isolation. Each MCP server runs in its own Docker container with capped resources and restricted host access. If a malicious MCP server tries to escape, it’s contained by Docker’s isolation. Pipelock’s sandbox uses Landlock, seccomp, and network namespaces at the process level, which is lighter but not container-grade isolation.

MCP Catalog. Docker Desktop includes a built-in catalog of containerized MCP servers. Browse, click, run. This makes discovering and deploying MCP servers straightforward for developers who already have Docker.

MCP Profiles. Named collections of MCP servers (e.g., “web-dev” = GitHub + Playwright + DB servers) that can be shared as OCI artifacts through container registries. Team-wide MCP configurations.

Automatic OAuth. Docker MCP Gateway handles OAuth flows for MCP servers that need authentication. No manual token configuration.

Image verification. --verify-signatures validates MCP server images before running them. Combined with Docker Content Trust, this provides supply chain verification for the server images themselves.

Distribution. Docker MCP Gateway ships with Docker and is integrated into Docker Desktop. That’s a significant distribution advantage. Pipelock requires separate installation.

Where Pipelock is better

Content scanning depth. Docker documents --block-secrets for secret detection. Pipelock’s DLP adds automatic base64, hex, and URL decoding on top of pattern matching, plus environment variable leak detection and entropy analysis.

Injection detection. Pipelock scans responses and MCP tool outputs for prompt injection through 6 normalization passes (NFKC, leetspeak decoding, vowel folding, optional-whitespace, base64/hex decode). In Docker’s public documentation reviewed in April 2026, I found container-level security controls but did not find content-level injection scanning documentation.

Tool poisoning and rug-pulls. Pipelock fingerprints MCP tool descriptions at session start and detects mid-session changes (rug-pulls). If a server changes its tool description to inject exfiltration instructions after the agent connects, Pipelock catches the drift.

HTTP and WebSocket coverage. Pipelock scans agent network traffic beyond MCP: HTTP forward proxy, HTTPS via CONNECT, WebSocket frames. If the agent fetches a URL or connects to a WebSocket endpoint, Pipelock scans that traffic too.

No Docker dependency. Pipelock is a single static binary that runs anywhere. No container runtime, no daemon. This matters for CI environments, production servers, and setups where Docker isn’t available.

The container-vs-content distinction

Container isolation answers: can this MCP server escape its sandbox?

Content scanning answers: is this MCP server leaking credentials or injecting instructions in the traffic it sends?

Both are valid security concerns. They cover different failure modes:

A malicious server tries to read host files? Container isolation blocks it.
A server’s response contains encoded credentials being exfiltrated? Content scanning can catch this. Container isolation alone may not address these content-layer scenarios.
A server changes its tool description to inject instructions? Content scanning detects the rug-pull. Container isolation alone may not flag this because it’s valid MCP traffic at the transport layer.

Neither alone covers everything. Together, they’re defense in depth.

When to use each

Start here if you need both containment and content scanning. It combines local containment with content scanning across MCP, HTTP, and WebSocket, without needing Docker.

Use Docker MCP Gateway if: You already run MCP servers in Docker and specifically want per-server container isolation, Catalog, Profiles, OAuth handling, or image-signature verification. It’s primarily a container and runtime boundary. For content-level traffic inspection, see Pipelock’s scanning pipeline.

Use both if: Docker is your MCP runtime and you want Pipelock to add content scanning, tool-description drift detection, and broader HTTP/WebSocket coverage.

Third-party feature descriptions are based on public materials reviewed in April 2026. Features and capabilities may change. Check each project’s current documentation for the latest.