School Signals and DfE AI Safety Evidence (USDC on Base)

by pay.adamhaleworks.workers.dev · remote · no sign-in to list tools · v1.0.0 · published by dev.workers.adamhaleworks.pay

English school edtech contract renewals and buyer briefs; DfE AI-safety toolkit. USDC on Base.

Final · 1Changes · 4

Compare Registry entry

7 tools: 1 do something that can't be undone, 4 change things and 2 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things4Claude 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 school-signals https://pay.adamhaleworks.workers.dev/mcp

Tools

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

7 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

check_transfer_orderFree.Reads text others writeNo findings
Why it is in this group
- The name "check_transfer_order" says "transfer": a word for a change that another call does not undo.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Free. With only order: status (and a fresh download link once paid). With tx_hash: verifies the Base transaction (canonical USDC, recipient, exact amount, success, time window, 10 confirmations, never used before) and returns the download link.
Annotations the server declares
- title: Check an order or submit its payment transaction (free)
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Changes things 4Creates or changes something that can be changed back.Claude Code: ask

buy_file_x402Paid 295 USDC (school-signals-england-snapshot) or 149 USDC (dfe-ai-safety-toolkit) via x402; returns a signed 48-hour download link, the file SHA-256 and an order URL.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Paid 295 USDC (school-signals-england-snapshot) or 149 USDC (dfe-ai-safety-toolkit) via x402; returns a signed 48-hour download link, the file SHA-256 and an order URL. Without payment returns the x402 terms. If your client caps automatic payments, use create_transfer_order instead.
Annotations the server declares
- title: Buy the England snapshot or the AI safety toolkit via x402
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
create_transfer_orderFree.Reads text others writeNo findings
Why it is in this group
- The name "create_transfer_order" says "create": a word for a change.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Free. Creates a 24-hour order with an order-specific exact USDC amount on Base. Send exactly that amount of canonical USDC to the recipient in one transfer, then call check_transfer_order with the transaction hash.
Annotations the server declares
- title: Start a plain USDC transfer order for a file (free)
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
school_buyer_briefPaid $0.20 USDC.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Paid $0.20 USDC. Hierarchy, published edtech contracts and incumbents, upcoming renewals with estimated windows, live tenders, recent trust changes and official links for one buyer. Unknown, ambiguous (candidates returned) or evidence-free buyers are refused before payment.
Annotations the server declares
- title: Buyer brief for one school, trust or council ($0.20)
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
school_renewalsPaid $0.03 USDC.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Paid $0.03 USDC. Up to 25 published edtech contracts at English schools, trusts and councils ending in a window, with incumbent, value, extensions, estimated re-procurement window and official notice links. Empty results and invalid filters are refused before payment.
Annotations the server declares
- title: Upcoming school edtech contract renewals ($0.03)
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

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

list_productsFree.Reads text others writeNo findings
Why it is in this group
- The name "list_products" says "list": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Free. Every product with its price in USDC, route, licence and how to pay (x402 or plain transfer on Base).
Annotations the server declares
- title: Products, prices and payment terms (free)
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
school_signals_searchFree.Reads text others writeNo findings
Why it is in this group
- The name "school_signals_search" says "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Free. Find buyer ids (school:<URN>, trust:<UID>, org:<slug>) with counts of published edtech contracts, renewals in the next 12 months, live tenders and trust changes. Use before school_buyer_brief.
Annotations the server declares
- title: Find an English school, trust or council (free)
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: 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 outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write7: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; buy_file_x402
check_transfer_order
create_transfer_order
list_products
school_buyer_brief
school_renewals
school_signals_search
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, 14:47 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: 5
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

HighThe whole server
The endpoint served tools/list without credentials, and the list has 5 tools that change things (1 irreversible, 4 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://pay.adamhaleworks.workers.dev/mcp: tools/list returned 7 tools to an anonymous client, including check_transfer_order (irreversible), school_renewals (write), school_buyer_brief (write), buy_file_x402 (write), create_transfer_order (write)
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 school-signals https://pay.adamhaleworks.workers.dev/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__school-signals__school_signals_search",
      "mcp__school-signals__list_products"
    ],
    "ask": [
      "mcp__school-signals__school_renewals",
      "mcp__school-signals__school_buyer_brief",
      "mcp__school-signals__buy_file_x402",
      "mcp__school-signals__create_transfer_order",
      "mcp__school-signals__check_transfer_order"
    ],
    "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 school-signals. Review it before you use it.

Capability tags behind 7 rules

mcp__school-signals__school_signals_search untrusted-input
mcp__school-signals__school_renewals untrusted-input
mcp__school-signals__school_buyer_brief untrusted-input
mcp__school-signals__list_products untrusted-input
mcp__school-signals__buy_file_x402 untrusted-input
mcp__school-signals__create_transfer_order untrusted-input
mcp__school-signals__check_transfer_order untrusted-input

Keep track

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

https://anlyon.dev/servers/dev.workers.adamhaleworks.pay/school-signals/changes.xml

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

Anlyon alternative

5 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, 18:12 UTC.

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