Assay Systems procurement register

by assay-systems.com · remote · no sign-in to list tools · v1.0.0 · published by com.assay-systems

Public procurement register, 50+ countries: suppliers, buyers, contracts, single-bid awards

Changes · 8

Compare Registry entry

10 tools: 8 change things and 2 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things8Claude Code: ask: see these tools
Only reads2Claude Code: allow: see these tools

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http register https://assay-systems.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

10 tools

Changes things 8Creates or changes something that can be changed back.Claude Code: ask

assay_contractOne contract or award record from the register.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
One contract or award record from the register. Needs an Enterprise Data key: X-API-Key header on the MCP request (https://assay-systems.com/api-key/#data).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_countriesCountries covered by the Assay Systems procurement register, with the number of suppliers indexed in each.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
Countries covered by the Assay Systems procurement register, with the number of suppliers indexed in each. Needs an Enterprise Data key: X-API-Key header on the MCP request (https://assay-systems.com/api-key/#data).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_endingContracts of one line that are still running, soonest end first: the next tenders to come.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
Contracts of one line that are still running, soonest end first: the next tenders to come. Paid: USD 0.01 per call in USDC on Base via x402 (or an X-API-Key Commercial key on the MCP request).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_lineA line of business (what is bought) in one country: buyers, suppliers and totals.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
A line of business (what is bought) in one country: buyers, suppliers and totals. Needs an Enterprise Data key: X-API-Key header on the MCP request (https://assay-systems.com/api-key/#data).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_line_contractsAll contract rows of one line of business with the buying office's contact, end dates and amounts.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
All contract rows of one line of business with the buying office's contact, end dates and amounts. Paid: USD 0.01 per call in USDC on Base via x402 (or an X-API-Key Commercial key on the MCP request).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_soloBuyer × supplier pairs where the supplier won without a rival, locks and buyer shares; without country — the list of countries.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
Buyer × supplier pairs where the supplier won without a rival, locks and buyer shares; without country — the list of countries. Paid: USD 0.01 per call in USDC on Base via x402 (or an X-API-Key Commercial key on the MCP request).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_supplierOne supplier's record: contracts won, buyers, totals, exclusions and grants, with the source and licence.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
One supplier's record: contracts won, buyers, totals, exclusions and grants, with the source and licence. Needs an Enterprise Data key: X-API-Key header on the MCP request (https://assay-systems.com/api-key/#data).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_supplier_contractsAll contract rows of one supplier with the buying office's contact, end dates and amounts.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
All contract rows of one supplier with the buying office's contact, end dates and amounts. Paid: USD 0.01 per call in USDC on Base via x402 (or an X-API-Key Commercial key on the MCP request).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true

Only reads 2Looks things up and changes nothing.Claude Code: allow

assay_searchSearch the register for a supplier (firm) by name or line of business.No findings
Why it is in this group
- The name "assay_search" says "search": a word for reading.
Description, as the server wrote it
Search the register for a supplier (firm) by name or line of business. Returns names, countries, ids and endpoints. Needs an Enterprise Data key: X-API-Key header on the MCP request (https://assay-systems.com/api-key/#data).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true
assay_statusWhen each source of the register was last read and built.No findings
Why it is in this group
- The name "assay_status" says "status": a word for reading.
Description, as the server wrote it
When each source of the register was last read and built.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
- idempotentHint: true

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.

Looked at Oct 22, 2026, 14:27 UTC, unchanged since Oct 22, 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: 8
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: none
RFC 9728 protected resource metadata: none
Authorization servers: none
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 8 tools that change things (8 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://assay-systems.com/mcp: tools/list returned 10 tools to an anonymous client, including assay_countries (write), assay_supplier (write), assay_line (write), assay_contract (write), assay_supplier_contracts (write) and 3 more
What this check looks for

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http register https://assay-systems.com/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__register__assay_search",
      "mcp__register__assay_status"
    ],
    "ask": [
      "mcp__register__assay_countries",
      "mcp__register__assay_supplier",
      "mcp__register__assay_line",
      "mcp__register__assay_contract",
      "mcp__register__assay_supplier_contracts",
      "mcp__register__assay_line_contracts",
      "mcp__register__assay_ending",
      "mcp__register__assay_solo"
    ],
    "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 register. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.assay-systems/register/changes.xml

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

Anlyon alternative

8 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 17:51 UTC.

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