chromium-sidecar (nextster/chromium-sidecar) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: there is no public source to read and no endpoint we can reach, so there is nothing for us to inspect. No publisher has claimed this listing.

Back to MCP Trust Indexm8ven
C
Emerging
74/100
7 days ago

chromium-sidecar

Enables local AI agents to operate the user's existing browser session via a Manifest V3 extension and native messaging, supporting tabs, DOM snapshots, clicks, form input, JavaScript, screenshots, cookies, network capture, and Arc Spaces.

→ nextster/chromium-sidecar· listed on glama

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.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every pushwhy connect →

Who stands behind it

nextster

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

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Install from

Glama

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// 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.
configARC_CODEX_ALLOWED_ORIGIN
configARC_CODEX_CAPTURES_DIR
configARC_CODEX_MAX_EVENTS
configARC_CODEX_NODE
configARC_CODEX_SOCKET
configARC_CODEX_STATE_DIR
configCHROMIUM_SIDECAR_ALLOWED_ORIGIN
configCHROMIUM_SIDECAR_ALLOWED_ORIGINS
configCHROMIUM_SIDECAR_CAPTURES_DIR
configCHROMIUM_SIDECAR_EXTENSION_IDS
configCHROMIUM_SIDECAR_LEGACY_SOCKET
configCHROMIUM_SIDECAR_MAX_CAPTURE_BYTES
configCHROMIUM_SIDECAR_MAX_EVENTS
configCHROMIUM_SIDECAR_MAX_EVENT_BYTES
configCHROMIUM_SIDECAR_MAX_EVENT_MEMORY_BYTES
configCHROMIUM_SIDECAR_NODE
configCHROMIUM_SIDECAR_SOCKET
configCHROMIUM_SIDECAR_STATE_DIR
// 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

28/28 tools missing one or more hints — status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); reload_extension (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); providers (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +25 more. 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.

Tool test coverage

18/28 tools referenced in tests (64%)

Write tests that reference each tool by name so every tool has at least one test.

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/nextster-chromium-sidecar-4e44nk)](https://m8ven.ai/mcp/nextster-chromium-sidecar-4e44nk)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: 285afc2319aa8bfbb22e7a271bba2fa43b0ccf77
code hash: 8add7f3b9b80e4de2817110c71f9ba843a215179cafdab42d7f53ccdbdbaafca
verified: 8/19/2026, 3:18:41 AM
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