palantir-core-workflow-b

name	palantir-core-workflow-b
description	Work with Palantir Foundry Ontology objects, actions, and queries via SDK. Use when querying objects, applying actions, linking objects, or building Ontology-driven applications. Trigger with phrases like "palantir ontology", "foundry objects", "palantir actions", "ontology query", "OSDK objects".
allowed-tools	Read, Write, Edit, Bash(pip:*), Bash(npm:*), Grep
version	1.5.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","palantir","foundry","ontology","osdk","actions"]
compatibility	Designed for Claude Code

Palantir Core Workflow B — Ontology Objects & Actions

Overview

Query, filter, and mutate Ontology objects using the Foundry Platform SDK and OSDK. Covers listing objects with property filters, following links between object types, applying actions, and aggregating object data. This is the primary workflow for Ontology-driven applications.

Prerequisites

• Completed palantir-install-auth setup
• An Ontology with configured object types, link types, and actions
• Familiarity with palantir-core-workflow-a (data pipelines feed the Ontology)

Instructions

Step 1: List and Filter Objects (REST API)

import os, foundry

client = foundry.FoundryClient(
    auth=foundry.UserTokenAuth(
        hostname=os.environ["FOUNDRY_HOSTNAME"],
        token=os.environ["FOUNDRY_TOKEN"],
    ),
    hostname=os.environ["FOUNDRY_HOSTNAME"],
)

ONTOLOGY = "my-company"

# List employees in Engineering, sorted by hire date
result = client.ontologies.OntologyObject.list(
    ontology=ONTOLOGY,
    object_type="Employee",
    page_size=20,
    order_by="hireDate:asc",
    properties={"department": "Engineering"},
)

for obj in result.data:
    p = obj.properties
    print(f"{p['fullName']} | {p['department']} | hired {p['hireDate']}")

Step 2: Search Objects with Filters

# Search with complex filters using the search endpoint
search_result = client.ontologies.OntologyObject.search(
    ontology=ONTOLOGY,
    object_type="Employee",
    where={
        "type": "and",
        "value": [
            {"type": , : , : },
            {: , : , : },
        ],
    },
    page_size=,
)
()