Skip to content
anlyon.devby Anlyon

Proof of Stock MCP server

xyz.proofofstock/proof-of-stockproofofstock.xyzstreamable-httpv0.5.1Scanned

Is this stock token the real one? Checks Base and Robinhood Chain tokens against the issuers' lists.

6 tools: 3 change things and 3 only read.

Tools: 0 delete, 0 irreversible, 3 write, 3 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

With Anlyon

3 tools here change things. Govern them.

  • Anlyon lists the tools and adopts none.
  • Each tool you adopt gets approvals and receipts.
  • Your agent never holds the key.
Govern this server →

A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.

Compare with similar serversMarkdownJSONReport this listing

What the Proof of Stock MCP server can do

The Proof of Stock MCP server is published by proofofstock.xyz, a domain the MCP Registry verified. It has 6 tools. It can create or change data (3 tools: stock_passport, verify_stock_tokens and recent_impostors), but cannot delete data. 3 tools only read.

None of its tools reads private data, brings in text other people write, or sends data out.

None of the fixed checks matched anything in its tool definitions. That is not a safety guarantee.

Its remote endpoint lists its tools without sign-in, and its tools changed once since anlyon.dev first saw them.

Last scanned Nov 12, 2026, version 0.5.1.

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

6 tools

Changes things 3Claude Code: ask
  • recent_impostorsTokens on a chain whose symbol or name copies an issuer-listed stock token while their contract is not in that registry, newest first (at most 50), optionally since an ISO time.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Tokens on a chain whose symbol or name copies an issuer-listed stock token while their contract is not in that registry, newest first (at most 50), optionally since an ISO time. Each names what it imitates and the listed address. A claim with evidence, not a verdict.

    Annotations the server declares

    • title: Recent impostors
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • stock_passportPassport of one token address: whether it is in the issuer registry (and, if not, which listed stock its name imitates); the issuer reference price and its age; the latest DEX pric…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Passport of one token address: whether it is in the issuer registry (and, if not, which listed stock its name imitates); the issuer reference price and its age; the latest DEX price and its premium over the reference; the premium series split by US market session; and every gap named. Readings are recorded every 15 minutes (latest.cadence_s), so "latest" is a recorded reading, not a live quote: see latest.age_s. premium compares the latest on-chain price with the issuer reference, whose own age is reference.age_s; when the two are far apart in time, latest.premium_at_reference_time gives the premium of one moment. sources names every source and the pool rule. Every answer opens with one plain sentence; quote it. In the JSON, premium and spread are FRACTIONS (0.01 = 1%; premium > 0 means the on-chain price is above the issuer's), *_age_s and age_s are seconds before generated_at, prices are USD per token. A token is worth `multiplier` shares, and the issuer's reference is already per token. reference.kind: nav_total_return = Coinbase's NAV, token_bid_ask_mid = the mid of Robinhood's token bid/ask. notes are codes for every gap (e.g. reading_stale = our last reading is over 30 min old, pools_capped = the pool count is a minimum). Two chains: base (Coinbase's tokens, symbols end in "c", e.g. NVDAc) and robinhood (Robinhood's, e.g. NVDA). When the user names no chain, call it for both. Facts with their time and source, not advice: https://proofofstock.xyz/docs/legal.md

    Annotations the server declares

    • title: Stock token passport
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • verify_stock_tokensBefore buying a token that claims to be a stock, check its contract address: is it on the issuer's own registry for this chain (Base: Coinbase; robinhood: Robinhood)?No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Before buying a token that claims to be a stock, check its contract address: is it on the issuer's own registry for this chain (Base: Coinbase; robinhood: Robinhood)? Up to 50 addresses per call. listed=true is decided by the exact address alone. listed=false means "not in this issuer's registry", not "fake" (it may be another issuer's token); impostor is set only when the token copies a listed symbol or the issuer's naming, and then listed_address is the real one. If the registry cannot be read the call fails rather than answering false. Facts, not advice.

    Annotations the server declares

    • title: Verify stock token addresses
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 3Show 3 read-only tools
  • compare_venuesFor shares listed on BOTH Base (Coinbase) and Robinhood Chain (Robinhood), matched by ISIN: per venue the on-chain price's premium over that venue's own issuer reference, the refer…No findings

    Why it is in this group

    • The name "compare_venues" says "compare": a word for reading.
    Description, as the server wrote it
    For shares listed on BOTH Base (Coinbase) and Robinhood Chain (Robinhood), matched by ISIN: per venue the on-chain price's premium over that venue's own issuer reference, the reference kind and age, the deepest pool's liquidity and the multiplier, and the gap (Robinhood premium minus Base premium) when both are current. Raw prices are never compared: multipliers and references differ (Coinbase NAV vs Robinhood bid/ask), so a gap is not a price difference or an arbitrage. Name a share by isin or by ticker (NVDA, or NVDAc); with neither, the 20 rows with the largest gap. A missing premium carries its reason; a reading older than 30 min is flagged stale and gets no gap. Facts, not advice.

    Annotations the server declares

    • title: Compare one share across venues
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • find_stock_tokenFind issuer-listed tokenized stocks on a chain by ticker, company name or ISIN.No findings

    Why it is in this group

    • The name "find_stock_token" says "find": a word for reading.
    Description, as the server wrote it
    Find issuer-listed tokenized stocks on a chain by ticker, company name or ISIN. Returns the official contract addresses. An empty result says only that the issuer lists no such token, nothing about impostors. Two chains: base (Coinbase's tokens, symbols end in "c", e.g. NVDAc) and robinhood (Robinhood's, e.g. NVDA). When the user names no chain, call it for both. Facts with their time and source, not advice: https://proofofstock.xyz/docs/legal.md

    Annotations the server declares

    • title: Find a stock token
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_stock_tokensList every token in a chain's issuer registry: symbol, name, contract address, ISIN, multiplier, whether it is minted on the chain and whether the issuer publishes a reference pric…No findings

    Why it is in this group

    • The name "list_stock_tokens" says "list": a word for reading.
    Description, as the server wrote it
    List every token in a chain's issuer registry: symbol, name, contract address, ISIN, multiplier, whether it is minted on the chain and whether the issuer publishes a reference price. The answer opens with the exact count (also the `count` field); quote that number, do not estimate it from the list. On Base many listed tokens are not minted yet and do not trade (`minted`). Two chains: base (Coinbase's tokens, symbols end in "c", e.g. NVDAc) and robinhood (Robinhood's, e.g. NVDA). When the user names no chain, call it for both. Facts with their time and source, not advice: https://proofofstock.xyz/docs/legal.md

    Annotations the server declares

    • title: List an issuer registry
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 13, 2026, 11:20 UTC, unchanged since Nov 13, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
3
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
not observed
Authorization servers
not observed
Legacy HTTP+SSE transport
no
Dynamic client registration
not observed
Client ID metadata documents
not observed
  • WarnThe whole server

    The endpoint served tools/list without credentials, and the list has 3 tools that change things (3 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://proofofstock.xyz/mcp: tools/list returned 6 tools to an anonymous client, including stock_passport (write), verify_stock_tokens (write), recent_impostors (write)

    What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

  1. Tools6 changed.~6 changedView diff
All changes to this server

Install

Pinned to version 0.5.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http proof-of-stock https://proofofstock.xyz/mcp
claude mcp add --transport http proof-of-stock https://proofofstock.xyz/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__proof-of-stock__find_stock_token",
      "mcp__proof-of-stock__list_stock_tokens",
      "mcp__proof-of-stock__compare_venues"
    ],
    "ask": [
      "mcp__proof-of-stock__stock_passport",
      "mcp__proof-of-stock__verify_stock_tokens",
      "mcp__proof-of-stock__recent_impostors"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as proof-of-stock. Review it before you use it.

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/xyz.proofofstock/proof-of-stock/verify?hash=913438e69271ffb22d88473c831224d371c5b11b741609d1f327591765ff2a11" | jq -e '.changed == false'

Pinned hash 913438e69271, from Nov 12, 2026, 20:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/xyz.proofofstock/proof-of-stock/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for xyz.proofofstock/proof-of-stock
[![anlyon.dev](https://anlyon.dev/badge/xyz.proofofstock/proof-of-stock.svg)](https://anlyon.dev/servers/xyz.proofofstock/proof-of-stock)

Source: MCP Registry · repository. Synced Nov 12, 2026, 20:18 UTC.

Proof of Stock MCP server: questions and answers

Answered from the scan above, not from the publisher's description.

Is the Proof of Stock MCP server safe?

No scan can promise that. What its definitions show: 6 tools, 3 of which can change, send or delete something, and 0 findings from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the Proof of Stock MCP server delete data?

No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.

Can the Proof of Stock MCP server do things that cannot be undone?

No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.

What tools does the Proof of Stock MCP server have?

6 tools: 3 write, 3 read. stock_passport, verify_stock_tokens, recent_impostors, find_stock_token, list_stock_tokens and compare_venues.

Does the Proof of Stock MCP server need sign-in or OAuth?

Its remote endpoint listed its tools to an anonymous client, without sign-in.

Does the Proof of Stock MCP server send data to outside services?

None of its tools sends, posts or publishes, or takes a recipient, channel or URL.

Has the Proof of Stock MCP server changed its tools?

Yes, once since anlyon.dev started tracking it, most recently on Nov 12, 2026. Every change is on this page and in its Atom feed.