curl_post

Make an HTTP POST request using curl

SERVERCurl MCP Server SOURCE247arjun/mcp-curl

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/247arjun-mcp-curl/curl-post.md

WHAT IT DOES

What curl_post does on Curl MCP Server

AI agents use curl_post to create or update resources in Curl MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Curl MCP Server environment.

RISK

Why curl_post is rated Medium

HTTP POST is the standard method for creating resources or submitting data. It can write data to arbitrary external services/APIs. The blast radius is high because an AI agent could POST sensitive data, trigger external workflows, or interact with any web endpoint reachable from the host. It is Write rather than Execute because POST itself is a data-submission operation, though misuse potential is significant.

From the tool's definition 'Make an HTTP POST request using curl' — POST requests create or submit data to external endpoints

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs curl_post safely

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

curl_post Rate-limited

curl_post stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "curl_post": {
      "limits": [
        {
          "counter": "curl_post_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about curl_post

What does the curl_post tool do? +

Make an HTTP POST request using curl. It is categorised as a Write tool in the Curl MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on curl_post? +

Register the Curl MCP Server MCP server in PolicyLayer and add a rule for curl_post: 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 Curl MCP Server. Nothing to install.

What risk level is curl_post? +

curl_post is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit curl_post? +

Yes. Add a rate_limit block to the curl_post 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 curl_post completely? +

Set action: deny in the PolicyLayer policy for curl_post. 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 curl_post? +

curl_post is provided by the Curl MCP Server MCP server (247arjun/mcp-curl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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