Count how many times a URL has been captured by the Internet Archive Wayback Machine, and find when a URL was first and last archived. Returns the total number of captures plus the earliest and latest capture timestamps (YYYYMMDDhhmmss).
Risk signalsAccepts URL/endpoint input (url)
Part of the Wayback server.
Free to start. No card required.
AI agents call get_capture_count to retrieve information from Wayback without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_capture_count only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_capture_count": {}
}
}See the full Wayback policy for all 23 tools.
These attack patterns abuse exactly the kind of access get_capture_count gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Count how many times a URL has been captured by the Internet Archive Wayback Machine, and find when a URL was first and last archived. Returns the total number of captures plus the earliest and latest capture timestamps (YYYYMMDDhhmmss).. It is categorised as a Read tool in the Wayback MCP Server, which means it retrieves data without modifying state.
Register the Wayback MCP server in PolicyLayer and add a rule for get_capture_count: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Wayback. Nothing to install.
get_capture_count is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_capture_count rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_capture_count. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_capture_count is provided by the Wayback MCP server (https://gateway.pipeworx.io/wayback/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 23 Wayback tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.