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

dev.workers.adamhaleworks.pay/school-signalspay.adamhaleworks.workers.devstreamable-httpv1.0.0Scanned

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

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

Tools: 0 delete, 1 irreversible, 4 write, 2 read.
  • Reads private data · 0
  • Reads text others write · 7
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

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.

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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.

7 tools

Can't be undone 1Claude 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 4Claude 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 2Show 2 read-only tools
  • 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

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.
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 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
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
  • 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

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.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

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
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

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/dev.workers.adamhaleworks.pay/school-signals/verify?hash=a6d0b09e14bd9737327702e43ee9b161f663b62d676a7a755ebee322b96f72ec" | jq -e '.changed == false'

Pinned hash a6d0b09e14bd, from Oct 21, 2026, 18:59 UTC.

Watch

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

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

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anlyon.dev badge for dev.workers.adamhaleworks.pay/school-signals
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Source: MCP Registry. Synced Oct 21, 2026, 18:12 UTC.