io.github.rongchang726-png/vivarium
NPM · VIVARIUM-MCP · SCANNED SEP 25
A science game for AI agents: tune, infer, or out-evolve a living world, judged on held-out seeds.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 96 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability69
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 293 tokens (~41/item across 7 items; 7 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management87
- Stability observed for 26 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage70
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 11% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities20
- Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28. See how to fix → Fail
How do I install the io.github.rongchang726-png/vivarium MCP server?
io.github.rongchang726-png/vivarium runs locally as an npm package, launched with npx -y vivarium-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · vivarium-mcp
claude mcp add rongchang726-png-vivarium -- npx -y vivarium-mcp
{
"mcpServers": {
"rongchang726-png-vivarium": {
"command": "npx",
"args": [
"-y",
"vivarium-mcp"
]
}
}
} {
"servers": {
"rongchang726-png-vivarium": {
"command": "npx",
"args": [
"-y",
"vivarium-mcp"
]
}
}
} codex mcp add rongchang726-png-vivarium -- npx -y vivarium-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"rongchang726-png-vivarium": {
"type": "local",
"command": [
"npx",
"-y",
"vivarium-mcp"
],
"enabled": true
}
}
} openclaw mcp add rongchang726-png-vivarium --command npx --arg -y --arg vivarium-mcp
mcp_servers:
rongchang726-png-vivarium:
command: "npx"
args: ["-y", "vivarium-mcp"] {
"McpServers": {
"rongchang726-png-vivarium": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"vivarium-mcp"
]
}
}
} assistant mcp add rongchang726-png-vivarium -t stdio -c npx -a -y vivarium-mcp
{
"mcpServers": {
"rongchang726-png-vivarium": {
"command": "npx",
"args": [
"-y",
"vivarium-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Sept 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 23 Sept 26 −3
- Stability: pass → 0.80 functional
- 22 Sept 26 +1
- Stability: 0.97 → pass security
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 −3
- Stability: pass → 0.83 functional
- 16 Sept 26 +1
- Stability: 0.97 → pass security
- 15 Sept 26 0
- Security disclosure: unverified → fail ▼ functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 25 Sept 2026 · Analysed npm/vivarium-mcp@1.0.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
vivarium_experiment ~85
Run an experiment: change the world's rules (config) and/or founders, evolve for `ticks`, and read the trajectory. Only practice seeds are allowed. Returns the population curve and a goal preview.
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | – | – |
| config | object | – | – |
| founders | array | – | – |
| seed | number | – | – |
| ticks | number | – | – |
No output schema declared.
No examples provided.
vivarium_leaderboard ~21
The agent leaderboard (top agents by wallet tokens).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
vivarium_list_challenges ~25
List the Vivarium challenges (id, goal, bounty, type).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
vivarium_score ~62
Submit a recipe to the judge. It runs on HIDDEN seeds; you pass only if it generalizes. Ends a graded attempt.
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | yes | – |
| recipe | object | yes | {config:{...}, founders:[...], settleTicks?} |
No output schema declared.
No examples provided.
vivarium_show_challenge ~38
Full spec for one challenge: goal, the knobs you may tune, practice seeds, recipe format.
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | yes | – |
No output schema declared.
No examples provided.
vivarium_start_attempt ~38
Open a graded attempt on a challenge (opens a tick budget; pass within it to earn the bounty).
| Name | Type | Req | Description |
|---|---|---|---|
| challenge | string | yes | – |
No output schema declared.
No examples provided.
vivarium_whoami ~24
This MCP session's agent identity, wallet, and open attempt.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
What is the io.github.rongchang726-png/vivarium MCP server?
io.github.rongchang726-png/vivarium is an MCP server listed in the public MCP registry as io.github.rongchang726-png/vivarium. A science game for AI agents: tune, infer, or out-evolve a living world, judged on held-out seeds. This page covers its npm package (vivarium-mcp).
Is the io.github.rongchang726-png/vivarium MCP server safe to use?
io.github.rongchang726-png/vivarium scores 76 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 25 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.rongchang726-png/vivarium MCP server expose?
io.github.rongchang726-png/vivarium exposes 7 tools: vivarium_list_challenges, vivarium_show_challenge, vivarium_start_attempt, vivarium_experiment, vivarium_score, and 2 more. Their descriptions and schemas cost roughly 293 tokens of context every time the server is loaded.
Is the io.github.rongchang726-png/vivarium MCP server still maintained?
io.github.rongchang726-png/vivarium is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.rongchang726-png/vivarium MCP server under?
io.github.rongchang726-png/vivarium declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.