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Shoon A2A Trust Services (pilot)

REMOTE · SHOON-A2A-SANDBOX.ONRENDER.COM · SCANNED SEP 29

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

+3 this week 62 Trust /100
Trust breakdown (7 categories)

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. How we score → Why this is hard to score →

Endpoint Security57
Transport & Reachability100
Schema Quality & AI Usability56
  • AI-judged instruction clarity (good).Pass
  • 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. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management30
  • Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage83
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 50% 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 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
  • Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.

remote · shoon-a2a-sandbox.onrender.com

# add to Claude Code
claude mcp add --transport http shoonenterprises-shoon-a2a-sandbox 'https://shoon-a2a-sandbox.onrender.com/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "type": "http",
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
# ~/.codex/config.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
    }
  }
}
# add to OpenClaw
openclaw mcp add shoonenterprises-shoon-a2a-sandbox --url 'https://shoon-a2a-sandbox.onrender.com/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  shoonenterprises-shoon-a2a-sandbox:
    url: "https://shoon-a2a-sandbox.onrender.com/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "shoonenterprises-shoon-a2a-sandbox": {
      "Transport": "http",
      "Url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}
# add to Vellum
assistant mcp add shoonenterprises-shoon-a2a-sandbox -t streamable-http -u 'https://shoon-a2a-sandbox.onrender.com/mcp'
// mcp.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 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.

  • 28 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
  • 26 Sept 26 +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.

  • 25 Sept 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 24 Sept 26 +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.

  • 22 Sept 26 +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.

  • 21 Sept 26 −1
    • 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 security
    • Schema quality: 150 → 325 ▼ functional
    • Stability: unverified → 0.03 ▲ functional
    • “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” cosmetic
  • 20 Sept 26 59

    First indexed and scored.

Diagnostics

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 29 Sept 2026 · Probed https://shoon-a2a-sandbox.onrender.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=onrender.com CN=WE1,O=Google Trust Services,C=US 21 Sept 2026 20 Dec 2026 ECDSA 256 ECDSA-SHA256 6eb1e3fe7d0631ea1337bfa4a321c137
SANs: onrender.com, *.onrender.com
CN=WE1,O=Google Trust Services,C=US (CA) CN=GTS Root R4,O=Google Trust Services LLC,C=US 13 Dec 2023 20 Feb 2029 ECDSA 256 ECDSA-SHA384 7ff31977972c224a76155d13b6d685e3
CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE 15 Nov 2023 28 Jan 2028 ECDSA 384 SHA256-RSA 7fe530bf331343bedd821610493d8a1b

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of shoon-a2a-sandbox.onrender.com. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
onrender.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://shoon-a2a-sandbox.onrender.com/mcp Verified 200
http (plaintext) http://shoon-a2a-sandbox.onrender.com/mcp HTTPS enforced 301 https://shoon-a2a-sandbox.onrender.com/mcp
MCP tools · 5 exposed · ~1,628 tokens

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 →

Tool Tokens
citation_audit ~323

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.

NameTypeReqDescription
inputobject––
quote_idstring–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…

No output schema declared.

No examples provided.

claim_verification ~347

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.

NameTypeReqDescription
inputobject––
quote_idstring–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…

No output schema declared.

No examples provided.

news_tripwire ~318

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.

NameTypeReqDescription
inputobject––
quote_idstring–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…

No output schema declared.

No examples provided.

proof_of_work_audit ~331

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.

NameTypeReqDescription
inputobject––
quote_idstring–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…

No output schema declared.

No examples provided.

structured_extraction ~309

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.

NameTypeReqDescription
inputobject––
quote_idstring–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…

No output schema declared.

No examples provided.

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.