Tool reference · Knowledge graph & temporal facts
kg_at
Returns the facts that were valid at a given moment, or the facts valid now when no timestamp is passed.
local stdio server read-only
When to use
- You want to know what the stack or configuration was on a past date.
- You want the current value of a fact, such as which database a service uses.
- You are reconstructing context for an old bug report.
Parameters
| Name | Type | Default | Description |
|---|---|---|---|
timestamp | string | — | ISO 8601 or omit for now |
subject | string | — | — |
predicate | string | — | — |
object | string | — | — |
project | string | — | — |
limit | integer | 100 | — |
Example
Arguments
{
"timestamp": "2026-03-01T00:00:00Z",
"subject": "my-api",
"project": "my-api"
}Result shape
{
"count": 1,
"assertions": [
{
"id": "1a2b3c4d5e6f47089a0b1c2d3e4f5a6b",
"subject": "my-api",
"predicate": "uses_queue",
"object": "redis",
"confidence": 1,
"project": "my-api",
"valid_from": "2025-11-02T09:00:00Z",
"valid_to": "2026-06-10T14:21:00Z",
"superseded_by": "5e0b7d2c9a1f4e3b8c6d0a2f4b6e8c1d"
}
]
}Values are illustrative; the keys follow the server's handler. MCP clients receive the result as JSON text content.
Server description
The description the server sends to your agent in tools/list, captured from the v14.7.0 source:
Point-in-time query: return fact assertions valid at `timestamp` (ISO 8601). Omit timestamp for currently-valid facts.