getInstitutionalOwnership

Lists every institution holding a given stock in a quarter. Requires ticker or cusip. For one manager's entire portfolio use /institutionalholdings.

SERVERAPI Ninjas SOURCEhttps://mcp.api-ninjas.com/mcp

Low RISK CLASS

Category Read

Parameters 100 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-api-ninjas-mcp/getinstitutionalownership.md

WHAT IT DOES

What getInstitutionalOwnership does on API Ninjas

AI agents call getInstitutionalOwnership to retrieve information from API Ninjas 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
`sort`	string	—	Sort order: value (default), shares, or manager_name.
`cusip`	string	—	9-character CUSIP (alternative to ticker).
`limit`	integer	—	Maximum results to return. Default 50, max 1000.
`offset`	integer	—	Number of results to skip for pagination.
`period`	string	—	Quarter-end date (YYYY-MM-DD). Defaults to the latest; free tier is limited to the most recent quarter.
`ticker`	string	—	Ticker symbol (e.g. AAPL). Either ticker or cusip is required.
`summary`	boolean	—	true returns the ownership-concentration aggregate instead of the holder list. Business/Professional/annual plans only. Premium only.
`put_call`	string	—	put or call; long positions are returned by default.
`min_value`	integer	—	Minimum market value (USD).
`min_shares`	integer	—	Minimum shares held.

Parameters from the server's own tool schema.

RISK

Why getInstitutionalOwnership is rated Low

Even though getInstitutionalOwnership 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.

Risk signalsHigh parameter count (10 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs getInstitutionalOwnership safely

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

getInstitutionalOwnership Allowed

getInstitutionalOwnership 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": {
    "getInstitutionalOwnership": {}
  }
}

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

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

FAQ

Questions about getInstitutionalOwnership

What does the getInstitutionalOwnership tool do? +

Lists every institution holding a given stock in a quarter. Requires ticker or cusip. For one manager's entire portfolio use /institutionalholdings. It is categorised as a Read tool in the API Ninjas MCP Server, which means it retrieves data without modifying state.

What parameters does getInstitutionalOwnership accept? +

getInstitutionalOwnership accepts 10 parameters: sort, cusip, limit, offset, period, ticker, summary, put_call, min_value, min_shares. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on getInstitutionalOwnership? +

Register the API Ninjas MCP server in PolicyLayer and add a rule for getInstitutionalOwnership: 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 API Ninjas. Nothing to install.

What risk level is getInstitutionalOwnership? +

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

Can I rate-limit getInstitutionalOwnership? +

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

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

getInstitutionalOwnership is provided by the API Ninjas MCP server (https://mcp.api-ninjas.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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