# io.github.0xsims/rubric-mcp-server (pypi · rubric_mcp_server)

Attest agent decisions and verify records on a public ledger. Evidence, not just data.

- Trust score: 51/100 (low)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- pypi · `rubric_mcp_server`: 51/100 (this document), [markdown](https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server.md), [page](https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server)

## Channel facts

- Registry: `pypi`
- Package: `rubric_mcp_server`
- Version: `2.5.0`
- Transport: `stdio`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 50/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs setuptools.build_meta at install time, a recognised native-build step with no shell scripting around it.
  - 0 of 29 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 6/100
  - Repository check failed: the declared repository URL returned HTTP 404.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (Proprietary) isn't a recognized OSI-approved license.
  - Actively maintained (last published 11 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 1027 tokens (~73/item across 14 items; 14 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 57/100
  - Stability observed for 17 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 77/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 30% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "relay_pay" implies "pay" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 14 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.0xsims/rubric-mcp-server server?

io.github.0xsims/rubric-mcp-server runs locally as a PyPI package, launched with uvx rubric_mcp_server. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add 0xsims-rubric-mcp-server -- uvx rubric_mcp_server
```

### Cursor

```json
{
  "mcpServers": {
    "0xsims-rubric-mcp-server": {
      "command": "uvx",
      "args": [
        "rubric_mcp_server"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "0xsims-rubric-mcp-server": {
      "command": "uvx",
      "args": [
        "rubric_mcp_server"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add 0xsims-rubric-mcp-server -- uvx rubric_mcp_server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "0xsims-rubric-mcp-server": {
      "type": "local",
      "command": [
        "uvx",
        "rubric_mcp_server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add 0xsims-rubric-mcp-server --command uvx --arg rubric_mcp_server
```

### Hermes

```yaml
mcp_servers:
  0xsims-rubric-mcp-server:
    command: "uvx"
    args: ["rubric_mcp_server"]
```

### Netclaw

```json
{
  "McpServers": {
    "0xsims-rubric-mcp-server": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "rubric_mcp_server"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add 0xsims-rubric-mcp-server -t stdio -c uvx -a rubric_mcp_server
```

### Other

```json
{
  "mcpServers": {
    "0xsims-rubric-mcp-server": {
      "command": "uvx",
      "args": [
        "rubric_mcp_server"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 51, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 50, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 49, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 48, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 47, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 46, −1)

- [functional regression] Schema quality: 876 → 1027
- [functional improvement] Tool coverage: 22% → 30%
- [functional] Destructive annotations: pass → 0
- [functional] Package version: 2.4.0 → 2.5.0

### 2026-09-08 (score 47, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-06 (score 46, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (14)

### `attest` (~70 tokens)

Attest an AI decision. With RUBRIC_API_KEY: HCS-anchored on Hedera mainnet. Without: PQ-signed local Merkle leaf in ~/.rubric/local-bundles/.

Input parameters:

- `agent_id` (string)
- `metadata` (object)
- `payload` (string, required)

### `verify` (~38 tokens)

Verify an attestation. Checks local store first, then federation. Merkle inclusion + HCS anchoring.

Input parameters:

- `attestation_id` (string, required)

### `get_proof` (~42 tokens)

Generate ZK Merkle inclusion proof (Noir/Barretenberg) for an attestation. Requires API key.

Input parameters:

- `attestation_id` (string, required)

### `register_agent` (~46 tokens)

Register an agent and receive a free Rubric developer API key via email.

Input parameters:

- `agent_name` (string, required)
- `email` (string, required)
- `use_case` (string)

### `status` (~25 tokens)

Federation health across US/SG/JP/CA/EU nodes + ZK node.

### `framework_detect` (~61 tokens)

Auto-detect applicable regulatory frameworks (EU AI Act, SR 11-7, HIPAA, NIST AI RMF, etc.) from decision content. Works offline, no key required.

Input parameters:

- `metadata` (object)
- `payload` (string, required)

### `cost_estimate` (~32 tokens)

Estimate monthly Rubric cost from expected decision volume. No key required.

Input parameters:

- `decisions_per_day` (number, required)

### `bundle_query` (~50 tokens)

Query attestation bundles by leaf type, agent, or time range. Requires Standard+ tier.

Input parameters:

- `agentId` (string)
- `leafType` (string)
- `limit` (number)

### `check_counterparty` (~109 tokens)

Get an attested OFAC/sanctions + on-chain risk screening for a Base address before transacting with it. The verdict is Hedera-anchored and citable as proof of diligence. Paid x402 service ($0.01 USDC); returns the exact payment challenge so a wallet-capable agent can obtain the live signed result.

Input parameters:

- `address` (string, required)
- `payment` (string): Signed x402 payment proof. Omit on the first call to receive the payment challenge.

### `screen_name` (~146 tokens)

Screen a person or entity name against six sanctions and export-control lists: OFAC SDN and Consolidated (with alternate spellings), UN Security Council, UK OFSI, EU, and BIS Denied Persons. Fuzzy matching with the full rule, list versions, and per-hit edit distance disclosed in every response. Matches are CANDIDATES requiring human adjudication, not determinations. Paid x402 service ($0.01 USDC); returns the payment challenge so a wallet-capable agent can obtain the attested result.

Input parameters:

- `name` (string, required)
- `payment` (string): Signed x402 payment proof. Omit on the first call to receive the payment challenge.

### `notarize` (~112 tokens)

Notarize any JSON record: prove it existed, unaltered, at a point in time. Returns a PROOF FILE the caller must keep - the chain stores a commitment, never the record. Paid x402 ($0.005 USDC) or with an API key. Proves existence and integrity, NOT that the record is true.

Input parameters:

- `label` (string)
- `payment` (string): Signed x402 payment proof. Omit to receive the payment challenge.
- `record` (object, required)

### `verify_record` (~92 tokens)

Verify a notarization. Two independent checks: does the record hash match the proof file (offline), and is the attestation anchored on Hedera consensus (online). Always free, no key, no payment - a proof only the issuer can check is not a proof.

Input parameters:

- `proof` (object, required): The proof file returned by notarize
- `record` (object): Optional. The record to check against the proof.

### `relay_pay` (~151 tokens)

Pay any x402 endpoint through Rubric and receive a signed, Hedera-anchored receipt of what was actually delivered: request hash, response hash, byte count, status, settlement reference. The provider is paid directly by you and Rubric never holds or submits your funds. Use this instead of calling an endpoint directly when you need provable evidence of what you received, not just the response. Free during preview, no key required.

Input parameters:

- `body` (object)
- `method` (string): HTTP method, default GET
- `payment` (string): Signed x402 payment. Omit to receive the target's challenge.
- `url` (string, required): Absolute URL of the x402 endpoint to pay

### `explain_rubric` (~53 tokens)

What Rubric is and why it matters: the difference between logs you control (testimony) and anchored records (evidence). Returns the trust model, how to verify independently, and pricing. No key required.

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server#diagnostics

## Score history

- 2026-09-20: 51
- 2026-09-19: 50
- 2026-09-18: 50
- 2026-09-17: 50
- 2026-09-16: 49
- 2026-09-15: 49
- 2026-09-14: 48
- 2026-09-13: 48
- 2026-09-12: 47
- 2026-09-11: 47
- 2026-09-10: 46
- 2026-09-09: 46
- 2026-09-08: 47
- 2026-09-07: 46
- 2026-09-06: 46
- 2026-09-05: 45
- 2026-09-04: 45
- 2026-09-03: 43

## Common questions

### What is the io.github.0xsims/rubric-mcp-server server?

io.github.0xsims/rubric-mcp-server is listed in the public MCP registry as io.github.0xsims/rubric-mcp-server. Attest agent decisions and verify records on a public ledger. Evidence, not just data. This page covers its PyPI package (rubric_mcp_server).

### Is the io.github.0xsims/rubric-mcp-server server safe to use?

io.github.0xsims/rubric-mcp-server scores 51 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. 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.0xsims/rubric-mcp-server server expose?

io.github.0xsims/rubric-mcp-server exposes 14 tools: attest, verify, get_proof, register_agent, status, and 9 more. Their descriptions and schemas cost roughly 1,027 tokens of context every time the server is loaded.

### Is the io.github.0xsims/rubric-mcp-server server still maintained?

io.github.0xsims/rubric-mcp-server is still listed as active in the MCP registry. We last reached this channel on 20 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.0xsims/rubric-mcp-server server under?

io.github.0xsims/rubric-mcp-server declares the Proprietary licence, which is not on the OSI-approved list. Read the terms before using it at work, and note this covers the source only, not the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/rubric_mcp_server/
- Socket report: https://socket.dev/pypi/package/rubric_mcp_server
- Changelog RSS feed: https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server.xml
- Changelog JSON feed: https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server.json
- HTML version of this page: https://verifymcp.io/servers/0xsims-rubric-mcp-server/rubric-mcp-server