← Home

mcp-proxy

npm Repository Homepage

A TypeScript SSE proxy for MCP servers that use stdio transport.

7
Versions
MIT
License
No
Install Scripts
Verified
Provenance

Supply chain provenance

Status for the latest visible version.

SLSA provenance attestation npm registry signatures gitHead linked

Maintainers

punkpeye

Keywords

MCPSSEproxy

Accepted risks

Findings the reviewer chose to accept rather than block on.

SourceRuleReasonAccepted byWhen
source-diff net-exec-file:dist/stdio-DN-u_q7a.mjs AI (source-diff): Rolldown bundle for an SSE proxy; network + require patterns are expected library code, not malware. ai
source-diff net-exec-file:dist/stdio-DQCs94rj.js AI (source-diff): File is a rolldown-bundled output of the package's TypeScript source. Network usage is expected for an SSE proxy; dynamic patterns are standard CommonJS interop shims generated by the bundler, not malware. ai
semgrep semgrep:env-spread AI (semgrep): process.env spread occurs only in test files (proxyServer.test.ts) to pass env vars to child processes — standard test scaffolding, not production code. ai
semgrep semgrep:shady-links-raw-ip AI (semgrep): Raw IP 127.0.0.1 appears only in test files for localhost test server setup — normal and expected for integration tests. ai

Versions (showing 7 of 7)

Version Deps Published
6.5.1 1 / 23
6.5.0 1 / 23
6.4.6 1 / 23
6.4.5 1 / 23
5.11.2 0 / 23
5.11.0 0 / 23
5.10.0 0 / 23

v6.5.1

2 findings
HIGH New file with network + code execution: dist/stdio-DN-u_q7a.mjs source-diff

Newly added file contains both network calls and dynamic code execution. This is a hallmark of dropper/loader malware.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v6.5.0

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v6.4.6

2 findings
HIGH env-spread: src/proxyServer.test.ts:44 semgrep

Spreading entire process.env into an object — may capture all secrets Source: https://github.com/punkpeye/mcp-proxy/blob/efa9a891de66f609ff0e0f27f739994ac7362f1d/src/proxyServer.test.ts#L44 42 | command: "tsx", 43 | env: serverDelay > 44 | ? ({ ...process.env, RESPONSE_DELAY: serverDelay } as Record< 45 | string, 46 | string

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v6.4.5

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v5.11.2

2 findings
HIGH New file with network + code execution: dist/stdio-DQCs94rj.js source-diff

Newly added file contains both network calls and dynamic code execution. This is a hallmark of dropper/loader malware.

LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v5.11.0

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v5.10.0

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.