grok-mcp MCP Server

Use xAI Grok as a peer reviewer + PR gate from Claude Code, Cursor, Cline and any MCP host.

Publisher claimed. No tool list reported, and Pod has not connected to this server.

Status

Pod has not dialled grok-mcp yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

Connect

Published as grok-cli-mcp on npm. Runs locally.

Known issues

15 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 12.

Most discussed

Tool schemas rejected by Claude API: target: "openApi3" emits boolean exclusiveMinimum, invalid under JSON Schema draft 2020-12

Summary

The server advertises tool input schemas that fail the Claude API's JSON Schema draft 2020-12 validation. Any Claude Code session with the four grok tools loaded gets hard 400s on every API request:

API Error: 400 tools.N.custom.input_schema: JSON schema is invalid. It must
match JSON Schema draft 2020-12 (https://json-schema.org/draft/2020-12).

Because the API rejects the whole request when any single tool schema is invalid, this breaks entire turns in the host agent

Read the thread · 2026-08-03 · open · external user · 0 comments

Audit and focus the tool surface — double down on review/validation value

Why this creates value

The project offers four tools:

grok_review (core value)
grok_challenge (core value when focused)
grok_consult
grok_chat

grok_chat is the least differentiated (many other Grok MCPs do general chat better or with more features). Spreading effort across general chat dilutes the unique positioning around review and second opinion.

Focusing makes the project:

Easier to explain in one sentence
Stronger in its chosen niche
Less likely to be compared unfa

Read the thread · 2026-06-23 · open · 0 comments

Create raw, high-signal demo assets and usage examples (optimized for developer sharing)

Why this creates value

What tends to get attention and trust for Grok/xAI related tools (from observed patterns):

Raw terminal output
Concrete before/after
Low-polish, high-signal demos (not fancy websites)
Clear demonstration that Grok adds something the primary workflow didn't have

Currently the project lacks ready-to-share assets that a developer would actually screenshot or link.

Deliverables

A small set of raw terminal / command examples showing the four tools in re

Read the thread · 2026-06-23 · open · 0 comments

Professionalize tool descriptions, internal prompts, and example outputs

Why this creates value

Tone and professionalism matter for perceived quality:

Prompts currently use language like "hostile senior engineer", "be specific and ruthless", "break this code".
This leaks into outputs and makes the tool feel more like a stunt than infrastructure.
Tool descriptions in the MCP server and README should clearly communicate the value ("second opinion", "catch issues your primary model is likely to miss", "detailed structured feedback").

Cleaning this up incre

Read the thread · 2026-06-23 · open · 0 comments

Make the composite GitHub Action (grok-review) zero-friction and truly production-ready

Why this creates value

The GitHub Action + grok-review-ci is currently one of the strongest concrete differentiators (structured review + sticky comment + gating).

However, to create real user value it needs to be obviously usable by strangers with minimal setup.

Current friction points:

Requires secrets + install steps that are not copy-paste simple
Docs are split between README and the action.yml
No "quick start for any repo" one-file example that just works
People may give

Read the thread · 2026-06-23 · open · 0 comments

Most recent

Expose MCP resources endpoint (help / models / prompt examples)

Goal

Let MCP-aware hosts discover ambient context about grok-build-mcp without round-tripping a tool call.

Background

MCP defines a `resources` capability separate from `tools` — read-only data the server exposes (file URIs, doc snippets, schemas). Top MCP servers (MongoDB, AWS) ship resources alongside tools.

Proposal

Implement `resources/list` and `resources/read` to expose:

`grok://help` — output of `grok --help`
`grok://models` — output of `grok models`
`gr

Read the thread · 2026-05-26 · open · 0 comments

MCP streaming response via progress notifications

Goal

Stream Grok's reasoning/output incrementally so the calling agent sees progress on long reviews instead of a 30-second blank.

Background

Today `runGrok` buffers the entire stdout and returns once on close.
MCP supports `notifications/progress` for long-running tools.
Grok CLI supports `--output-format streaming-json` for incremental NDJSON output.

Proposal

Add `stream: true` option to `grok_chat` / `grok_review` / `grok_consult` / `grok_challenge`.
When

Read the thread · 2026-05-26 · open · 0 comments

Add README badges (npm version, downloads, CI status, MIT)

Goal

Standard at-a-glance signals at the top of the README.

Proposal

Right under the title, add:

```md [![License:

Read the thread · 2026-05-26 · open · 0 comments

Add CONTRIBUTING.md + GitHub issue templates

Goal

Lower friction for outside contributors so triage stays easy.

Proposal

CONTRIBUTING.md covering:
- How to run tests (npm test) and build (npm run build)
- Branch / commit message conventions
- PR checklist (tests pass, README updated if behaviour changes, no debug logging left in)
.github/ISSUE_TEMPLATE/bug_report.yml — reproduction steps, expected vs actual, MCP host, grok CLI version
.github/ISSUE_TEMPLATE/feature_request.yml — problem, proposed tool/sch

Read the thread · 2026-05-26 · closed · 0 comments

Expose reasoning_effort / best_of_n / check flags

Goal

Expose Grok CLI's three highest-leverage quality flags so callers can trade latency for review depth.

Background

Grok CLI supports:

--reasoning-effort <low|medium|high|xhigh|max> — controls reasoning budget.
--best-of-n <N> — runs N parallel attempts and returns the best (huge for code review).
--check — appends a self-verification loop to the prompt.

None are surfaced by the MCP wrapper today.

Proposal

Add the following to all four tools' input schemas:

```ts re

Read the thread · 2026-05-26 · open · 0 comments

Add output_format: "json" option for grok_review and grok_challenge

Goal

Let programmatic consumers (CI bots, IDE integrations) parse structured verdicts/scores instead of regex-grepping markdown.

Background

Grok CLI supports --output-format plain | json | streaming-json. Today both grok_review and grok_challenge always return markdown text.

Proposal

Add output_format to both tools' input schema:

```ts output_format?: "markdown" | "json" // default "markdown" ```

When json:

Pass --output-format json through to grok CLI.
For `g

Read the thread · 2026-05-26 · open · 0 comments

Add session persistence to grok_consult

Goal

Eliminate per-call overhead of re-passing the full message history for multi-turn Grok conversations.

Background

Grok CLI natively supports -c/--continue (resume most recent session) and -r/--resume <SESSION_ID>. Currently grok_consult is fully stateless — the caller passes the full messages[] every call. For long reviews / iterative debugging this becomes wasteful and lossy.

Proposal

Add optional session_id parameter to grok_consult:

When session_id is absent →

Read the thread · 2026-05-26 · open · 0 comments

See all 15 reports Pod holds for grok-mcp.

Firsthand observations

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