ko-mcp

get_form144_notices

Read-onlyIdempotent

Get SEC Form 144 filings — notices of proposed sale of restricted/controlled securities by insiders. Filed before selling, these signal upcoming insider sales. Complements Form 4 (post-trade) with pre-trade intent.

Input Schema

TableJSON Schema

Name	Required	Description
`limit`	No	Max notices to return
`ticker`	No	Filter by stock ticker (e.g. 'AAPL')
`insider_cik`	No	Filter by the CIK that FILED the notice (usually the selling insider, sometimes a filing agent such as the issuer itself) -- not the issuer whose stock is sold. Leading zeros ignored; combines with ticker.

Output Schema

TableJSON Schema

Name	Required	Description
`rows`	Yes
`paging`	Yes	Paging state reconciled from ko.io meta.total_count and meta.softwall
`filters`	Yes
`plan_limit`	Yes	The Free/keyless plan limits ko.io applied to this answer (null for paid callers)

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 13, 2026

changedInput schema / properties / insider_cik / description

Previous value: -"Filter by insider's CIK number"New value: +"Filter by the CIK that FILED the notice (usually the selling insider, sometimes a filing agent such as the issuer itself) -- not the issuer whose stock is sold. Leading zeros ignored; combines with ticker."

Changed1 schema field changedSep 26, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "filters": {
+      "additionalProperties": false,
+      "properties": {
+        "insider_cik": {
+          "$ref": "#/properties/filters/properties/ticker"
+        },
+        "ticker": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "ticker",
+        "insider_cik"
+      ],
+      "type": "object"
+    },
+    "paging": {
+      "additionalProperties": false,
+      "description": "Paging state reconciled from ko.io meta.total_count and meta.softwall",
+      "properties": {
+        "continuation": {
+          "description": "SIGNIN_REQUIRED = page>1 needs a (free) ko.io API key",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "has_more": {
+          "description": "null = a full page came back and more MAY exist",
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
+        "next_page": {
+          "anyOf": [
+            {
+              "$ref": "#/properties/paging/properties/total_count/anyOf/0"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Next page THIS caller can open; null when there is none (or sign-in is required)"
+        },
+        "page": {
+          "type": "integer"
+        },
+        "per_page": {
+          "type": "integer"
+        },
+        "plan_row_cap": {
+          "anyOf": [
+            {
+              "$ref": "#/properties/paging/properties/total_count/anyOf/0"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Row cap the caller's plan applied to this page, if any"
+        },
+        "returned": {
+          "type": "integer"
+        },
+        "total_count": {
+          "anyOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Total rows matching the request, when ko.io reported it"
+        },
+        "truncated_by_plan": {
+          "description": "True when the plan's row cap withheld rows from this page",
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "page",
+        "per_page",
+        "returned",
+        "total_count",
+        "has_more",
+        "next_page",
+        "continuation",
+        "plan_row_cap",
+        "truncated_by_plan"
+      ],
+      "type": "object"
+    },
+    "plan_limit": {
+      "anyOf": [
+        {
+          "additionalProperties": false,
+          "properties": {
+            "continuation": {
+              "$ref": "#/properties/filters/properties/ticker"
+            },
+            "date_basis": {
+              "$ref": "#/properties/filters/properties/ticker"
+            },
+            "effective_period": {
+              "$ref": "#/properties/filters/properties/ticker"
+            },
+            "policy_version": {
+              "$ref": "#/properties/filters/properties/ticker"
+            },
+            "row_cap": {
+              "anyOf": [
+                {
+                  "$ref": "#/properties/paging/properties/total_count/anyOf/0"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "truncated": {
+              "type": [
+                "boolean",
+                "null"
+              ]
+            },
+            "window_end": {
+              "$ref": "#/properties/filters/properties/ticker"
+            },
+            "window_start": {
+              "$ref": "#/properties/filters/properties/ticker"
+            }
+          },
+          "required": [
+            "policy_version",
+            "window_start",
+            "window_end",
+            "effective_period",
+            "date_basis",
+            "row_cap",
+            "truncated",
+            "continuation"
+          ],
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "The Free/keyless plan limits ko.io applied to this answer (null for paid callers)"
+    },
+    "rows": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "accession_no": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "aggregate_market_value": {
+            "anyOf": [
+              {
+                "$ref": "#/properties/rows/items/properties/units_to_sell/anyOf/0"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Exact decimal string as served by ko.io (not rounded); null = unknown"
+          },
+          "approx_sale_date": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "broker_name": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "filed_date": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "has_10b5_1_plan": {
+            "type": [
+              "boolean",
+              "null"
+            ]
+          },
+          "issuer_cik": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "issuer_name": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "issuer_ticker": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "relationship": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "securities_class": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "seller_name": {
+            "$ref": "#/properties/filters/properties/ticker"
+          },
+          "units_to_sell": {
+            "anyOf": [
+              {
+                "pattern": "^-?\\d+(\\.\\d+)?([eE][-+]?\\d+)?$",
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Units the filer NOTIFIED an intent to sell -- not a completed sale"
+          }
+        },
+        "required": [
+          "accession_no",
+          "filed_date",
+          "issuer_ticker",
+          "issuer_name",
+          "issuer_cik",
+          "seller_name",
+          "relationship",
+          "securities_class",
+          "units_to_sell",
+          "aggregate_market_value",
+          "approx_sale_date",
+          "broker_name",
+          "has_10b5_1_plan"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "filters",
+    "rows",
+    "paging",
+    "plan_limit"
+  ],
+  "type": "object"
+}

First observedJul 11, 2026

TDQS

A4/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is fully covered. The description adds domain meaning (pre-trade filing intent, insider scope) but says nothing operational — no ordering, pagination, or result-shape behavior — so it adds value without being rich.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three tight sentences with zero filler; the resource definition is front-loaded and the Form 4 comparison closes the thought. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need no explanation, and the schema fully documents the three filters. What remains is a good domain framing of Form 144 versus Form 4; nothing an agent needs to invoke it correctly is missing, though ordering/recency behavior of the returned notices is unstated.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%: limit, ticker, and insider_cik all carry their own descriptions, including the non-obvious caveat that insider_cik is the FILER, not the issuer. The description adds no parameter-level meaning beyond the schema, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource (get SEC Form 144 filings) and immediately defines the resource as 'notices of proposed sale of restricted/controlled securities by insiders.' It explicitly positions itself against the sibling concept of Form 4, so an agent can distinguish it from get_insider_trades without opening a schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Filed before selling, these signal upcoming insider sales' and 'Complements Form 4 (post-trade) with pre-trade intent' tell the agent the analytical context in which this tool applies. However, it never states a routing rule such as 'use get_insider_trades for completed transactions' or notes when this tool should be skipped, so no explicit exclusions are given.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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