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Annalist MCP Tool Change Monitor
x402
Annalist MCP Tool Change Monitor is a paid API for AI agents from api.annalist.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Returns a signed, chronological feed of tool additions, removals, and redefinitions across Official MCP Registry servers to detect rug-pull-style attacks
Price / call$0.01
Success—
StatusUnknown
How this service works
Tool changes across remote MCP servers in the Official MCP Registry, newest first: tools added, removed or redefined (description, input schema or annotations), from our daily fingerprints. A tool that changes after you approved it is how 'rug pull' attacks work, so check before trusting a server again. Last 1 to 30 days, or one server with name= or url=. Servers whose tools change by design are marked. Signed.
Output
A signed, chronologically ordered list of tool change events from the Official MCP Registry, including which server changed, what tool was affected, the type of change (added, removed, or redefined — covering description, input schema, or annotations), and timestamps. Servers whose tools change by design are flagged. The response is cryptographically signed for tamper-evidence.
Example use cases
Pre-approval security audit of MCP server
“Before I re-enable the io.github.acme/data-tools MCP server in my agent setup, check if any of its tools have changed in the last 30 days — I need to know if descriptions, input schemas, or annotations were silently modified.”
Weekly MCP registry change digest
“Give me a summary of all tool changes across the Official MCP Registry from the past 7 days — which servers added new tools, removed old ones, or redefined existing ones?”
Rug-pull detection for a specific server URL
“Has the MCP server at https://tools.example.com/mcp changed any of its tool definitions in the last 3 days? I approved it last week and want to make sure nothing was quietly altered.”
Technical details
Endpoint
GEThttps://api.annalist.dev/v1/mcp/changes?utm_source=zero.xyzWhen to prefer
Use this endpoint specifically when you need to audit or monitor MCP server tool definitions for unexpected changes — especially before re-approving a previously trusted server, detecting rug-pull-style supply chain attacks, or compiling a change digest across the Official MCP Registry. It is the only known signed, independent source for daily tool fingerprint diffs across the registry.
Side effects
- Invalid days parameter (outside 1–30 range) returns an error
- Unknown server name or URL returns empty results or a not-found error
- Both name and url provided simultaneously may produce ambiguous results
- Registry API downtime causes upstream failures
- Signed response verification failure may indicate tampered data in transit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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