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.
This record as markdown: /tools/crawlora-mcp/extract.md
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.
Why extract is rated Low
This tool performs data retrieval and transformation from public web sources. It reads and parses content without modifying, deleting, or executing operations that would affect external systems. The lack of side effects and read-only nature clearly places it in the Read category with low severity.
From the tool's definition Tool description states it 'Scrapes a public URL into clean Markdown, then returns data that strictly conforms to the supplied bounded JSON Schema.' The operations are retrieval-only: scraping public URLs and extracting data into structured format with no…
Attacks that exploit this kind of access
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 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 Crawlora, apply this rule, and every extract call is checked against it from then on.
Questions about 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. It is categorised as a Read tool in the Crawlora MCP Server, which means it retrieves data without modifying state.
extract accepts 1 parameter: extractOption. Required: extractOption. The full parameter table on this page comes from the server's own tool schema.
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.
extract 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 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.
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.
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.
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