blen-labs/fedreg-mcp-server (blen-labs/fedreg-mcp-server) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 3 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100
2 days ago

blen-labs/fedreg-mcp-server

Code-mode MCP server for the U.S. Federal Register, Electronic Code of Federal Regulations, and regulations.gov APIs.

→ blen-labs/fedreg-mcp-server· npm: @blen/fedreg-mcp-server· listed on npm

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

blen-labs

Source: npm

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// key findings
🚨
Known vulnerabilities in dependencies: 1 critical
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 1 credential: FEDREG_REGS_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies1 critical

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

criticalvitest@2.1.9GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configFEDREG_ALLOWED_HOSTS
configFEDREG_ALLOWED_ORIGINS
configFEDREG_AUTH_AUDIENCE
configFEDREG_AUTH_ISSUER
configFEDREG_AUTH_JWKS_URL
configFEDREG_AUTH_PROVIDERnone / embedded / generic-oidc / clerk / workos / auth0
configFEDREG_AUTH_RESOURCE
configFEDREG_AUTH_SCOPES
configFEDREG_CACHE_MAX_ITEMS
configFEDREG_CACHE_TTL_MS
configFEDREG_ECFR_BASE_URL
configFEDREG_FR_BASE_URL
configFEDREG_IP_BURST
configFEDREG_IP_RPS
configFEDREG_LOG_LEVEL
configFEDREG_PUBLIC_ORIGINPublic origin clients reach (used in OAuth metadata).
🔐 secretFEDREG_REGS_API_KEYregulations.gov requires a free API key from [api.data.gov / open.gsa.gov](https://open.gsa.gov/api/regulationsgov/). Set it via . The key is held host-side and never reaches the sandbox.
configFEDREG_REGS_BASE_URLregulations.gov v4 API base URL.
configFEDREG_REGS_MAX_CALLS_PER_EXECUTECaps regulations.gov upstream calls per execute() run (rate-limit guardrail).
configFEDREG_REGS_RATE_PER_HOURProcess-wide cap on regs upstream calls/hour (protects the shared key). In-memory; with N replicas, divide by N. Must be ≥ 1.
configFEDREG_REGS_SUBJECT_RATE_PER_HOURPer-subject regs calls/hour (HTTP mode only; skipped on stdio; one shared anonymous bucket under --insecure). Must be ≥ 1.
configFEDREG_SANDBOXauto / isolate / deno
configFEDREG_SUBJECT_DAILY_QUOTARequests per authenticated subject per UTC day.
configFEDREG_UPSTREAM_RETRIES
configFEDREG_UPSTREAM_TIMEOUT_MS
configFEDREG_USER_AGENTIdentify yourself, per FR/eCFR etiquette.
configHOST
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployPORT
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

3/3 tools missing one or more hints — search_api (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); describe_schema (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); execute (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint). OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Dev dependencies

1 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/blen-labs/fedreg-mcp-server)](https://m8ven.ai/mcp/blen-labs/fedreg-mcp-server)
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commit: c40772d255fa86a13c4560ce36a7c0f58c514a01
code hash: ad67adc795e95701409b7a9e18f5b11e1522216c66debe33c08f5fe0ef9f11ac
verified: 9/8/2026, 11:19:12 AM
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