extract

Extract schema-conforming JSON from a URL. Scrapes a public URL into clean Markdown, then returns data that strictly conforms to the supplied bounded JSON Schema.

SERVERCrawlora SOURCEcrawlora-mcp

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/crawlora-mcp/extract.md

WHAT IT DOES

What extract does on Crawlora

AI agents call extract to retrieve information from Crawlora 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
`extractOption`	object	Yes	Extraction options

Parameters from the server's own tool schema.

RISK

Why extract is rated Low

Even though extract 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

RECOMMENDED RULE

The rule that runs extract safely

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

extract Allowed

extract 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": {
    "extract": {}
  }
}

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

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

FAQ

Questions about extract

What does the extract tool do? +

Extract schema-conforming JSON from a URL. Scrapes a public URL into clean Markdown, then returns data that strictly conforms to the supplied bounded JSON Schema. It is categorised as a Read tool in the Crawlora MCP Server, which means it retrieves data without modifying state.

What parameters does extract accept? +

extract accepts 1 parameter: extractOption. Required: extractOption. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on extract? +

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

What risk level is extract? +

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

Can I rate-limit extract? +

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

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

extract is provided by the Crawlora MCP server (crawlora-mcp). 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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