open source · free for all
Oskis — Open Source Skilskis. Free for all.
Oskis are community-contributed AI skills, free to run via the skill.ski public MCP endpoint. 127 indexed across 6 upstream sources. Attribution required — no paywall, no lock-in.
install · 30 seconds
Get all 127 Oskis into your agent
01
Sign up free
Create a free skil.ski account. No card. Oskis ship with every account.
02
Copy your MCP token
Settings → MCP → Generate token. The free tier scope is the Oski catalog.
03
Add the server
Paste the URL + token into Claude Desktop, Cursor, ChatGPT Custom GPT, Codex, or any MCP client.
Free MCP endpoint
https://skil.ski/api/mcp/freeFree tier · scoped to the Oski catalog. Pro and Elite endpoints unlock the full skill registry.
example config
{
"mcpServers": {
"skil-ski-oskis": {
"url": "https://skil.ski/api/mcp/free",
"headers": {
"Authorization": "Bearer <token>"
}
}
}
}browse oskis
14 OpenAI Oskis
RAG Pattern (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer asks how to ground an LLM answer in their own corpus, build a basic Retrieval-Augmented Generation flow, embed a knowledge base, or stop hallucinations by retrieving relevant context before generation.
MITGet via MCP →
Function Calling Pattern (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer wants to let a chat model call external tools, define a JSON schema for a function the model should invoke, parse tool_calls back from the response, or build a tool-using agent loop.
MITGet via MCP →
Embeddings Classification (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer needs a cheap, no-finetune classifier for text labels (sentiment, intent, category), wants to use embeddings + a logistic regression / cosine-similarity head, or is comparing embedding models for a downstream classifier.
MITGet via MCP →
Summarize Long Documents (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer needs to summarize a document longer than the context window, wants a map-reduce or recursive summarization pattern, or is hitting token limits on a single-call summary.
MITGet via MCP →
Structured Outputs Pattern (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer wants the model to return JSON that conforms to a schema, needs guaranteed valid output for downstream parsing, or is replacing brittle regex-extraction with response_format json_schema.
MITGet via MCP →
Prompt Caching 101 (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer wants to cut API cost / latency on long-system-prompt apps, structure prompts so the static prefix is cacheable, or measure cache hit rate and savings.
MITGet via MCP →
Orchestrating Agents (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer wants to build a routine + handoff multi-agent system, hand off control between specialist agents, or implement a router agent that dispatches to sub-agents.
MITGet via MCP →
Batch API Pattern (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer has thousands of independent prompts to run, wants 50% off via Batch API, or needs to process a CSV / bulk dataset asynchronously instead of synchronous calls.
MITGet via MCP →
Rate Limit Handling (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer is hitting 429 errors, needs an exponential backoff with jitter retry wrapper, or wants to throttle parallel API calls to stay under TPM/RPM caps.
MITGet via MCP →
Moderation Pipeline (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer ships user-facing AI text/images and needs a pre-call (input) and post-call (output) moderation gate using the free omni-moderation endpoint.
MITGet via MCP →
Token Counting with tiktoken (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer needs to estimate token count before a call, budget a context window, choose a chunk size for embeddings, or accurately compute the cost of a prompt.
MITGet via MCP →
Hallucination Guardrails (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer needs an output validation gate that flags hallucinated facts, wants a self-consistency / faithfulness check, or is building a critic-pass on top of a generator.
MITGet via MCP →
Parse PDFs for RAG (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer needs to ingest PDFs into a RAG index, extract clean text + tables from a PDF, or chunk a multi-page document for embedding.
MITGet via MCP →
Vision Image Tagging (OpenAI Cookbook)
OpenAIengineering
Trigger when a developer wants to auto-tag, caption, or describe images using a vision-capable model, build an image search index, or extract structured attributes from product photos.
MITGet via MCP →
open contribution
Want to publish an Oski?
Oskis are open-source Skilskis — contribute yours via GitHub. Include a SKILL.md, a license, and a source attribution and we will list it here.
Submit a PR →