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Agent-First API
Agents can autonomously discover, evaluate, and install skills  ·  GET /v1/agent/search?capability=web_search
/llms.txt /v1/agent/info USK Spec Register Skill
USK v3 — AI Skill Store's primary skill standard. Write once, auto-convert for 7 platforms. Anthropic SKILL.md v2 also accepted as compatibility input.
📖 USK Guide USK Spec

🔥 Popular Skills — Top 5 by downloads

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Most Wanted · 3 unmet searches
e.g. 2026 searched 298×
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📦 All Skills 263

approved Data Processing

Open a SQLite .db file and run schema inspection, safe SELECT execution, EXPLAIN QUERY PLAN analysis, and index/stats queries. Zero external dependencies (Python stdlib sqlite3 only).

approved Data Processing

Convert JSON Schema / DDL / CSV headers to PySpark StructType code, and reverse-convert PySpark schemas to Avro or JSON Schema. No Spark runtime required.

approved Development

Validates HTTP request objects (method, URL, headers, body) against RFC standards and OpenAPI specs, returning structured error lists. Prevents request-generation bugs before execution in agent API automation loops.

official Utilities

Send emails securely without exposing SMTP passwords, powered by MGC Blackbox.

approved Development

Parse unified git diff text into structured per-file data: change type, line counts, hunk positions, language detection. Zero external dependencies.

approved Knowledge

Extract entities and relations from text and return node-edge graph data. Zero external dependencies.

memory-bank v1.0.0
approved AI/ML

Persistent key-value memory store with tags and FTS5 full-text search for agents across sessions. SQLite + trigram tokenizer. Zero external dependencies.

approved AI/ML

Deterministic JSON state machine for multi-step agent workflow tracking — checkpoint, restore, and failure recovery without LLM hallucination

approved Security

Given a vulnerability type (SQL Injection, XSS, SSRF, etc.), returns OWASP/CWE-based fix patterns, safe code alternatives, and a validation checklist — no external dependencies.

approved Development

Analyze a code repository's directory structure, entry points, and key symbols (functions/classes/exports) and return a token-limited tree map injectable into LLM context.

docx-toolkit v1.0.0
approved Text Processing

Extract text, tables, images, and metadata from DOCX files, and generate new DOCX from templates.

approved AI/ML

Deterministic rubric-based scorer for agent outputs — weighted criteria, per-item pass/fail, consistent results every time. No LLM needed.

approved AI/ML

Deterministic JSON Schema validator for LLM outputs. Returns full violation list with JSON Pointer paths ($.actions[0].priority), fix hints per keyword, and summary — self-correction loop anchor.

approved Utilities

Stitch multiple images vertically, horizontally, or in a grid layout with resize, padding, and background color options. Pillow-only, no external APIs.

approved Web

Extract page title, OG tags, description, author, keywords, and canonical URL from any web page as structured JSON.

approved Text Processing

Extract action items, assignees, deadlines, and decisions from meeting transcripts — USK v3 native, Korean/English, zero dependencies

approved AI/ML

Runtime context window management for AI agents — token budget estimation, message pruning, relevance reranking, and context splitting (zero dependencies)

approved Development

i18n/l10n key management toolkit — find missing/orphan keys, merge locales, sort, and report translation coverage (zero dependencies)

approved Data Processing

CSV/TSV data validation toolkit — schema inference, type checking, null detection, duplicate detection, and quality reports (stdlib only)

approved AI/ML

Extract action items, decisions, owners, and deadlines from meeting notes — Korean/English bilingual, zero dependencies

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