Ariadne Nexus CUSIP, Bond Valuation & FINRA TRACE Finance

At a glance

Runs where

On their server. What you send to it goes to them.

What you need

Nothing: it answered without a login

Tools

6 tools

Its own safety labels

6 read-only

Memory it takes

About 3,900 tokens of your AI's memory, just for its tool descriptions

Largest answer

About 3.7 KB in our test

Speed

Average answer in our test: 88 ms

Tokens are an estimate: the characters in its tool names, descriptions and inputs, divided by 4. The exact number depends on your AI model. Safety labels are what the server says about itself. From our latest test, 11 Nov 2026.

Is Ariadne Nexus CUSIP, Bond Valuation & FINRA TRACE Finance MCP server safe?

• None of the hidden-instruction wordings we know were found in its 6 tool descriptions.
• Its error messages showed no secrets or internal details.
• All 6 of its tools are labeled read-only.
• Overall it scored 68/100 on 11 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What this test does not check

• Its source code and packages.
• What a tool quietly does behind the scenes, such as writing a file or calling another service.
• Instructions hidden inside live tool answers. We only look for those in tool descriptions.
• Hidden instructions worded in a way our list doesn't know yet.
• Tools that could change something. Those are read, never run.

What QAmcp can and can't see · How to tell if an MCP server is safe · Hidden instructions · Prompt injection

Known security advisories

Not looked up yet. QAmcp tests how a server behaves. It does not scan source code.

What it can do

6 tools, in the server's own words.

Test results

Safe mode: only tools labeled read-only were run. How the test works

• ✕
  Tools work with good inputs

  3 failed

  • ✕get_cusip_valuation: Its reply breaks the MCP rules, so AI apps can't read it: it promised a structured answer (outputSchema) but sent none
  • ✕get_debt_radar: Its reply breaks the MCP rules, so AI apps can't read it: it promised a structured answer (outputSchema) but sent none
  • ✕calculate_clearing_fee: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (must have required property 'clearingVolumeUsd'; must have required property 'bridgeFeeUsd'; and 1 more)
  • –run_portfolio_stress_test: Not run: labeled read-only, but its name starts with "run", which usually means it changes something. Skipped to be safe: if it only reads, a clearer name helps AI apps too, or test again with --owner
  • and 2 more
  fail
• ✕
  Bad inputs give a clean error

  2 failed, 1 warning

  • ✕get_cusip_valuation: Broke the MCP rules on wrong type for "ticker": it promised a structured answer (outputSchema) but sent none
  • ✕calculate_clearing_fee: Broke the MCP rules on wrong type for "tier": its structured answer doesn't match its own output schema (must have required property 'clearingVolumeUsd'; must have required property 'bridgeFeeUsd'; and 1 more)
  • !provision_agent_key: Accepted wrong type for "tier" without complaining
  • and 3 more
  fail
• !
  Ready for the newest MCP version

  1 warning

  • !Uses an older MCP version (2024-11-05). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
  note
• !
  Tools are labeled safe or dangerous

  1 warning

  • !run_portfolio_stress_test: Labeled read-only, but its name starts with "run" and its description says "Executes". Worth double-checking the label, since AI apps trust it.
  note
• !
  Resources and prompts work

  4 warnings (4 resources, 5 prompts)

  • !quant_bond_valuation: Doesn't complain when the required input cusip is missing.
  • !sanctions_compliance_audit: Doesn't complain when the required input entity_name is missing.
  • !rwa_clearing_syndication: Doesn't complain when the required input clearing_volume_usd is missing.
  • !apa_regulatory_comment: Doesn't complain when the required input agency_id is missing.
  • and 3 more
  note
• ✓
  ConnectsConnected in 267 ms
  pass
• ✓
  Lists its toolsFound 6 tools
  pass
• ✓
  Every tool is describedAll 6 tools and their inputs are described
  pass
• ✓
  No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 267 ms
  • ✓Listing tools took 90 ms
  • ✓Average tool answer: 88 ms
  • ✓provision_agent_key: Slowest tool: provision_agent_key (92 ms)
  pass
• ✓
  No secrets leakedChecked 10 error messages: no secrets or internal details
  pass
• ✓
  Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
  pass
• –
  Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
  not tested

Test it yourself

Free and open source. Same checks, same score.

Show this score on GitHub

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Score over time

• 11 Nov 202668

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Ariadne Nexus CUSIP, Bond Valuation & FINRA TRACE Finance, signed in with GitHub, one per person. Reviews never change the score.