url.open
Maps to GET /v1/open for URL checks (page_risk, whois, page). Score 0–100, lower is better. HTTP 402 when unpaid — prefer X-54ch10-Stack or Bearer 54k_ via BRIEF_API_KEY. For type=url calls /v1/open?q=; for address|token keeps GET /v1/brief?type=&q=. Call first for wrap-before-click; then domain....
This record as markdown: /tools/54ch10-mcp/url.open.md
What url.open does on 54ch10
AI agents call url.open to retrieve information from 54ch10 without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why url.open is rated Low
Even though url.open only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs url.open safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 54ch10, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For url.open, this is the rule to start with:
url.open is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 54ch10, apply this rule, and every url.open call is checked against it from then on.
Questions about url.open
Maps to GET /v1/open for URL checks (page_risk, whois, page). Score 0–100, lower is better. HTTP 402 when unpaid — prefer X-54ch10-Stack or Bearer 54k_ via BRIEF_API_KEY. For type=url calls /v1/open?q=; for address|token keeps GET /v1/brief?type=&q=. Call first for wrap-before-click; then domain.whois / domain.dns / domain.tls. Analytics-only. It is categorised as a Read tool in the 54ch10 MCP Server, which means it retrieves data without modifying state.
Register the 54ch10 MCP server in PolicyLayer and add a rule for url.open: 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 54ch10. Nothing to install.
url.open 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 url.open 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 url.open. 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.
url.open is provided by the 54ch10 MCP server (sachio222/54ch10-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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