httpHeader

Fetch HTTP response headers for a URL

SERVERMcp SOURCE@geekflare/mcp

Low RISK CLASS

Category Read

Parameters 31 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-geekflare-mcp/httpheader.md

WHAT IT DOES

What httpHeader does on Mcp

AI agents call httpHeader to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`url`	string	Yes	Target URL
`proxyCountry`	string	—	Country code for proxy routing
`followRedirect`	boolean	—

Parameters from the server's own tool schema.

RISK

Why httpHeader is rated Low

Fetching HTTP headers is a read-only operation that queries information about a web resource without modifying, executing code, or deleting data. The risk is low because header inspection is non-destructive and commonly performed for diagnostics and security analysis.

From the tool's definition Tool name is 'httpHeader' and description states 'Fetch HTTP response headers for a URL' — this is a retrieval operation with no side effects.

Risk signalsAccepts URL/endpoint input (url)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs httpHeader safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For httpHeader, this is the rule to start with:

httpHeader Allowed

httpHeader is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "httpHeader": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every httpHeader call is checked against it from then on.

FAQ

Questions about httpHeader

What does the httpHeader tool do? +

Fetch HTTP response headers for a URL. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

What parameters does httpHeader accept? +

httpHeader accepts 3 parameters: url, proxyCountry, followRedirect. Required: url. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on httpHeader? +

Register the MCP server in PolicyLayer and add a rule for httpHeader: 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 Mcp. Nothing to install.

What risk level is httpHeader? +

httpHeader is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit httpHeader? +

Yes. Add a rate_limit block to the httpHeader 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.

How do I block httpHeader completely? +

Set action: deny in the PolicyLayer policy for httpHeader. 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.

What MCP server provides httpHeader? +

httpHeader is provided by the MCP server (@geekflare/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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