# RyRank (pypi · ryrank-mcp)

Cohere-compatible pay-per-call reranker, no signup, x402/USDC

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- pypi · `ryrank-mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/trigeochiral-ryrank/ryrank-mcp.md), [page](https://verifymcp.io/servers/trigeochiral-ryrank/ryrank-mcp)

## Channel facts

- Registry: `pypi`
- Package: `ryrank-mcp`
- Version: `1.0.0`
- 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**: 100/100
  - No malware found by supply-chain analysis.
  - 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 9 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 16 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 80/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 202 tokens (~202/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 53/100
  - Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 1 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 RyRank MCP server?

RyRank runs locally as a PyPI package, launched with uvx ryrank-mcp. 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 trigeochiral-ryrank -- uvx ryrank-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "trigeochiral-ryrank": {
      "command": "uvx",
      "args": [
        "ryrank-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "trigeochiral-ryrank": {
      "command": "uvx",
      "args": [
        "ryrank-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add trigeochiral-ryrank -- uvx ryrank-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "trigeochiral-ryrank": {
      "type": "local",
      "command": [
        "uvx",
        "ryrank-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add trigeochiral-ryrank --command uvx --arg ryrank-mcp
```

### Hermes

```yaml
mcp_servers:
  trigeochiral-ryrank:
    command: "uvx"
    args: ["ryrank-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "trigeochiral-ryrank": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "ryrank-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add trigeochiral-ryrank -t stdio -c uvx -a ryrank-mcp
```

### Other

```json
{
  "mcpServers": {
    "trigeochiral-ryrank": {
      "command": "uvx",
      "args": [
        "ryrank-mcp"
      ]
    }
  }
}
```

## 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 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 78, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-18 (score 63, +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.

### 2026-09-17 (score 62, −15)

- [security regression] Malware scan: pass → unverified

### 2026-09-15 (score 77, +16)

- [security improvement] Malware scan: unverified → pass

### 2026-09-14 (score 61, −15)

- [security regression] Malware scan: pass → unverified

### 2026-09-13 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 75, +19)

- [security improvement] Malware scan: unverified → pass
- [functional improvement] Stability: unverified → 0.27

## MCP tools (1)

### `rerank` (~202 tokens)

RyRank — rerank documents by a query

Rerank a list of documents/passages by relevance to a query. Cohere-compatible response (`results: [{index, relevance_score}]`), so it drops into an existing rerank call. One pass, no GPU, no model download, NO ACCOUNT - $0.001 USDC per call over x402 (about half of Cohere Rerank) or a free tier. Documents are supplied per call and discarded - this is NOT a persistent index. Best when the candidates already share vocabulary with the query (typical RAG retrieval output); it is a lexical-semantic method, not a cross-encoder. Up to 1000 docs per call.

Input parameters:

- `documents` (array, required): 2-1000 documents (strings)
- `query` (string, required): the query to rank against
- `return_documents` (boolean): include the document text in each result
- `top_n` (integer): return only the top N (default: all)

Output parameters:

- `meta` (object)
- `results` (array)

## Diagnostics

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

## Score history

- 2026-09-20: 79
- 2026-09-19: 78
- 2026-09-18: 63
- 2026-09-17: 62
- 2026-09-16: 77
- 2026-09-15: 77
- 2026-09-14: 61
- 2026-09-13: 76
- 2026-09-12: 75
- 2026-09-11: 56
- 2026-09-10: 71
- 2026-09-09: 71
- 2026-09-08: 71
- 2026-09-07: 71
- 2026-09-06: 71
- 2026-09-05: 71
- 2026-09-04: 71

## Common questions

### What is the RyRank MCP server?

RyRank is an MCP server listed in the public MCP registry as io.github.trigeochiral/ryrank. Cohere-compatible pay-per-call reranker, no signup, x402/USDC. This page covers its PyPI package (ryrank-mcp).

### Is the RyRank MCP server safe to use?

RyRank scores 79 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 RyRank MCP server expose?

RyRank exposes 1 tool: rerank. Their descriptions and schemas cost roughly 202 tokens of context every time the server is loaded.

### Is the RyRank MCP server still maintained?

RyRank 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 RyRank MCP server under?

RyRank declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/ryrank-mcp/
- Socket report: https://socket.dev/pypi/package/ryrank-mcp
- Repository: https://github.com/trigeochiral/ryrank-mcp
- Website: https://trigeochiral.com/
- Changelog RSS feed: https://verifymcp.io/servers/trigeochiral-ryrank/ryrank-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/trigeochiral-ryrank/ryrank-mcp.json
- HTML version of this page: https://verifymcp.io/servers/trigeochiral-ryrank/ryrank-mcp