MCP server for interacting with the Scryfall MTG API
Weapon Lab is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
What it does
Find and fix first-person weapon bugs behind a gate: your game's probe measures, the Gate judges
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user weapon-lab-mcp '--' uvx weaponlab-mcp
# 2 — ask your agent for something these tools do
# project_info, contract_check, spec_list and 27 more
Weapon Lab costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. This one runs on your machine: your client starts Weapon Lab as a process under your own user, with your files and your network, so the tool surface below is what it can do to your computer rather than to a server somewhere else. Its scan result is on the Security tab — read the surface before you approve it.
This is a public server: you run it yourself and this marketplace is not in the path. You need uv (docs.astral.sh/uv): uvx comes with it. Claude Code registers it in one command; --scope user makes it available in every project. The '--' is in quotes so that PowerShell passes it on.
claude mcp add --scope user weapon-lab-mcp '--' uvx weaponlab-mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Nothing is required, but it can take WEAPONLAB_PROJECT (The project folder holding weaponlab.json; the current folder if not set), WEAPONLAB_BLENDER (Blender's executable for Motion Lab, if it is not on the PATH or in the usual install folder) if you want to set them.
One config entry your client uses to start the process locally. A local server runs with your file system and your network, which is why it is priced without metering.
30 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
The project in use: its folder, data, specs and work folders, the probe command, Blender.
No parameter schema on file.
Checks a file a probe reads or writes against the probe contract.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| kind | string | yes | job, rows or parts |
| path | string | yes | — |
| job_path | string | no | for rows: the job they answer |
Every weapon spec: marks, actions, marks still proposed.
No parameter schema on file.
One weapon's spec, with the default limits filled in.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| weapon | string | yes | — |
Every problem with a spec, as sentences (empty: whole).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| spec | object | no | a spec to check; or name a saved one |
| weapon | string | no | — |
Saves a whole spec and returns what changed.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| spec | object | yes | — |
The cases (each a known bug as a metric, a weapon, an action and a pass rule).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| weapon | string | no | — |
| status | string | no | — |
Every metric: provider, unit, which way is better, tolerance.
No parameter schema on file.
The project's weapons.
No parameter schema on file.
Adds or replaces a case.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| case | object | yes | {id, weapon, action, metric, rule {op, value}, about, source} |
Measures the weapons with the providers (probe, rig, or the project's own) and stores the run.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| providers | array | yes | — |
| weapons | array | no | — |
| actions | array | no | — |
| staging | string | no | — |
Pass only if the target cases pass, nothing else got worse past its tolerance and the checks are trusted.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| run_id | string | yes | — |
| targets | array | no | — |
A run's rows become the baseline (merged over the old).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| run_id | string | yes | — |
A staged change measured and judged; the proposal waits for a person's approval.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| name | string | yes | — |
| targets | array | yes | — |
| providers | array | yes | — |
| staging | string | no | — |
| weapons | array | no | — |
| actions | array | no | — |
Marks a passed proposal approved. Only on a person's word.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| proposal | string | yes | — |
| approved_by | string | yes | who approved, in their words |
Every proposal: passed, approved.
No parameter schema on file.
Each provider's eval: faults caught, good cases passed, trusted.
No parameter schema on file.
The processes that must not run with the probe, running now.
No parameter schema on file.
The job's weapons the probe would get.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| weapons | array | no | — |
| actions | array | no | — |
One probe run: rows, and screenshots and parts dumps at the moments.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| weapons | array | yes | — |
| actions | array | no | — |
| at | object | no | {action: [seconds]} for screenshots and dumps |
| tune | object | no | {weapon: {field: value}}: a fix tried without writing it |
| staging | string | no | a folder whose stage.json overrides assets |
| shots | string | no | — |
| parts | string | no | — |
| slomo | number | no | — |
A parts dump's pieces (triangles, centre, bounds, extents) and twins (a piece drawn twice).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| obj | string | yes | — |
The weapon spec's facts (order, side, below, in) on a dump.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| weapon | string | yes | — |
| obj | string | yes | — |
A magazine's line into its well over a reload's moments: worst offset and tilt while in the well.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| seated_obj | string | yes | — |
| moment_objs | array | yes | — |
| bone | string | yes | — |
| well_depth_cm | number | no | — |
| axis | array | no | — |
A sliding part's path against its axis: line_cm and seat_cm.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| seated_obj | string | yes | — |
| moment_objs | array | yes | — |
| bone | string | yes | — |
| axis | array | yes | — |
A melee hilt against the fist's grip channel, and the turn and move that lay it in (try them with probe_run's tune; a palm-down fist can hold the hilt right and still point the blade sideways: look at the screenshot).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| obj | string | yes | — |
| side | string | no | — |
The hand's roll about its forearm through a clip (0 thumb up; past 80 degrees breaks the forearm's range).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| fbx | string | yes | — |
| side | string | no | — |
One clip's hand turned about its forearm, the twist bones sharing it.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| src_fbx | string | yes | — |
| out_fbx | string | yes | — |
| side | string | no | — |
| degrees | string | no | a number, or auto: the clip starts thumb up |
A set of clips rolled, each from its own start, saved under new names (<name>_<suffix>).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| fbx_files | array | yes | — |
| out_folder | string | yes | — |
| suffix | string | yes | — |
| side | string | no | — |
| degrees | string | no | — |
A sliding part's track rebuilt on its axis from its seat.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| src_fbx | string | yes | — |
| out_fbx | string | yes | — |
| bone | string | yes | — |
| root | string | yes | — |
| axis | array | no | — |
| seat | array | no | — |
Dev views of parts dumps (not the game's view).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| objs | array | yes | — |
| out_folder | string | yes | — |
- Every tool, no call limit
- No card, and mcprush charges nothing for it
- Source published under MIT
- Runs on your machine — nothing of it reaches our gateway
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Weapon Lab or to call it, at any volume.
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
| Term | Level | What it prices | Points |
|---|---|---|---|
| capability-exposure | high | capability blast radius (high) — client exposure if the model is manipulated | −6 |
| verification-discount | none | publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read | −2 |
| coverage-honesty | source | inspection depth (source) — how much of the target the scan could see | −0 |
What the scan could actually read
A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.
Tools were statically extracted from the published source (30 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Capability — what it could do if the model were manipulated
Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. high is the level these add up to.
| Tool | Capability tags | Why the tag was assigned |
|---|---|---|
| project_info | no tags | |
| contract_check | no tags | |
| spec_list | no tags | |
| spec_read | no tags | |
| spec_validate | no tags | |
| spec_write | no tags | |
| gate_cases | no tags | |
| gate_metrics | no tags | |
| gate_weapons | no tags | |
| gate_add_case | no tags | |
| gate_run | no tags | |
| gate_verdict | no tags | |
| gate_set_baseline | no tags | |
| gate_propose | no tags | |
| gate_approve | no tags | |
| gate_proposals | no tags | |
| gate_evals | no tags | |
| probe_status | no tags | |
| probe_plan | no tags | |
| probe_run | no tags | |
| rig_pieces | no tags | |
| rig_facts | sensitive-source | sensitive-source: keyword "dump" |
| rig_align | no tags | |
| rig_part_line | no tags | |
| rig_fist | no tags | |
| motion_roll_profile | no tags | |
| motion_roll | no tags | |
| motion_roll_set | no tags | |
| motion_track | no tags | |
| motion_render | no tags |
Toxic-flow graph
The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.
The public result for this release does not print the flow graph, so there is nothing to show here. That is not the same as "no paths were found": what the scan did read is above, under coverage.
Supply chain and provenance
This is the first scan of this surface here, so there is nothing yet to compare it against.
Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.
Release history
Always latest — the install command names no version, so it installs the newest release when it runs; the current release on file is 0.1.0. Pin a release below and the command asks for exactly that one.
No release note was published with this version.
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Any signed-in account that does not publish Weapon Lab can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.