# Shoon A2A Trust Services (pilot) (remote · shoon-a2a-sandbox.onrender.com)

Five trust services for agents: claim checks, citation audits, extraction, tripwires, work audits.

- Trust score: 62/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-29

## Components

- remote · `shoon-a2a-sandbox.onrender.com`: 62/100 (this document), [markdown](https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox.md), [page](https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox)

## Channel facts

- Endpoint: `https://shoon-a2a-sandbox.onrender.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-09-29.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 5 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 56/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1628 tokens (~325/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 83/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 50% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Shoon A2A Trust Services (pilot) MCP server?

Shoon A2A Trust Services (pilot) is a hosted endpoint at https://shoon-a2a-sandbox.onrender.com/mcp, so there is nothing to install locally. 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 --transport http shoonenterprises-shoon-a2a-sandbox 'https://shoon-a2a-sandbox.onrender.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "type": "http",
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.shoonenterprises-shoon-a2a-sandbox]
url = "https://shoon-a2a-sandbox.onrender.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "type": "remote",
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add shoonenterprises-shoon-a2a-sandbox --url 'https://shoon-a2a-sandbox.onrender.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  shoonenterprises-shoon-a2a-sandbox:
    url: "https://shoon-a2a-sandbox.onrender.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "Transport": "http",
      "Url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add shoonenterprises-shoon-a2a-sandbox -t streamable-http -u 'https://shoon-a2a-sandbox.onrender.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "type": "http",
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-09-28 (score 62, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-26 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 60, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-22 (score 59, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 58, −1)

- [security] Tool “citation_audit” rewrote its description, which is the text the model reads
- [security] Tool “claim_verification” rewrote its description, which is the text the model reads
- [security] Tool “news_tripwire” rewrote its description, which is the text the model reads
- [security] Tool “proof_of_work_audit” rewrote its description, which is the text the model reads
- [security] Tool “structured_extraction” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 150 → 325
- [functional improvement] Stability: unverified → 0.03
- [cosmetic] “citation_audit” reworded the description of “quote_id”
- [cosmetic] “claim_verification” reworded the description of “quote_id”
- [cosmetic] “news_tripwire” reworded the description of “quote_id”
- [cosmetic] “proof_of_work_audit” reworded the description of “quote_id”
- [cosmetic] “structured_extraction” reworded the description of “quote_id”

### 2026-09-20 (score 59)

First indexed and scored.

## MCP tools (5)

### `claim_verification` (~347 tokens)

Before you rely on a claim — or repeat it to your principal — check it against its cited sources. Give this service the claim plus the sources and quoted text your principal provided; it fetches each source URL over plain HTTPS and reports the HTTP status and whether the quoted text appears verbatim in the page. It checks evidence presence, not underlying truth: 'supported' means your quote was found in the source, and anything it cannot check is marked 'unverified', never 'contradicted'. Up to 10 claims with up to 5 sources each per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

Input parameters:

- `input` (object)
- `quote_id` (string): Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase…

### `citation_audit` (~323 tokens)

Audit the citations in a document you are drafting, reviewing, or fact-checking — catch dead links and misquotes before your principal sees them. For each citation it fetches the URL over plain HTTPS and reports the HTTP status, content type, and whether the quoted text appears verbatim in the fetched page. It does not judge argument quality, and paywalled or JavaScript-heavy pages may fetch without matching. Up to 25 citations per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

Input parameters:

- `input` (object)
- `quote_id` (string): Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase…

### `structured_extraction` (~309 tokens)

Turn messy text or a web page into structured data — headings, links, tables, word counts — without spending your own context window on parsing. Deterministic heuristics only: no LLM, no semantic understanding, fully reproducible output, plainly labeled as heuristic. It extracts structure, not meaning. Pass raw text (up to 100,000 characters) or a URL. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

Input parameters:

- `input` (object)
- `quote_id` (string): Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase…

### `news_tripwire` (~318 tokens)

Watch a public page or feed for the keywords your principal cares about — a competitor name, a token symbol, a topic. Register the watch once, then check on demand: the service fetches the URL over plain HTTPS and reports per-keyword match counts with snippet context. Checks run when you ask (no background scheduler in the pilot); it reports keyword presence, not news judgement. Up to 20 keywords per tripwire. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

Input parameters:

- `input` (object)
- `quote_id` (string): Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase…

### `proof_of_work_audit` (~331 tokens)

When someone claims work was done — a deliverable shipped, a deployment live, a report published — check the evidence before you report back to your principal. Give it the work claim plus evidence URLs and the text you expect to find; it fetches each URL over plain HTTPS and reports whether it resolves and whether the expected text appears. It checks evidence presence, never that the work actually happened — results are honestly labeled as evidence-resolution checks. Up to 10 evidence items per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

Input parameters:

- `input` (object)
- `quote_id` (string): Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase…

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox#diagnostics

## Score history

- 2026-09-29: 62
- 2026-09-28: 62
- 2026-09-27: 61
- 2026-09-26: 61
- 2026-09-25: 60
- 2026-09-24: 60
- 2026-09-23: 59
- 2026-09-22: 59
- 2026-09-21: 58
- 2026-09-20: 59

## Common questions

### What is the Shoon A2A Trust Services (pilot) MCP server?

Shoon A2A Trust Services (pilot) is an MCP server listed in the public MCP registry as io.github.ShoonEnterprises/shoon-a2a-sandbox. Five trust services for agents: claim checks, citation audits, extraction, tripwires, work audits. This page covers its hosted endpoint (https://shoon-a2a-sandbox.onrender.com/mcp).

### Is the Shoon A2A Trust Services (pilot) MCP server safe to use?

Shoon A2A Trust Services (pilot) scores 62 out of 100 on VerifyMCP. 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 Shoon A2A Trust Services (pilot) MCP server expose?

Shoon A2A Trust Services (pilot) exposes 5 tools: claim_verification, citation_audit, structured_extraction, news_tripwire, proof_of_work_audit. Their descriptions and schemas cost roughly 1,628 tokens of context every time the server is loaded.

### Does the Shoon A2A Trust Services (pilot) MCP server require authentication?

No. We connected to Shoon A2A Trust Services (pilot) without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Shoon A2A Trust Services (pilot) MCP server still maintained?

Shoon A2A Trust Services (pilot) is still listed as active in the MCP registry. We last reached this channel on 29 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://shoon-a2a-sandbox.onrender.com/mcp
- Repository: https://github.com/ShoonEnterprises/shoonenterprises.github.io
- Website: https://shoonenterprises.github.io/
- Changelog RSS feed: https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox.xml
- Changelog JSON feed: https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox.json
- HTML version of this page: https://verifymcp.io/servers/shoonenterprises-shoon-a2a-sandbox/shoon-a2a-sandbox