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<div align="center"> <picture> <source media="(prefers-color-scheme: dark)" srcset="assets/readme-logo-dark.png"> <source media="(prefers-color-scheme: light)" srcset="assets/light/readme-logo-light.png"> <img alt="LAP — Lean API Platform" src="assets/readme-logo-dark.png"> </picture> # Lean API Platform **Agent-Native API specs. Verified, compressed, ready to install.** <a href="https://pypi.org/project/lapsh/"><img src="https://img.shields.io/pypi/v/lapsh?style=for-the-badge&color=blue" alt="PyPI"></a> <a href="https://github.com/Lap-Platform/lap/actions/workflows/ci.yml"><img src="https://img.shields.io/github/actions/workflow/status/Lap-Platform/lap/ci.yml?branch=main&style=for-the-badge&label=tests" alt="Tests"></a> <a href="https://www.npmjs.com/package/@lap-platform/lapsh"><img src="https://img.shields.io/npm/v/@lap-platform/lapsh?style=for-the-badge&color=blue" alt="npm"></a> <a href="https://github.com/Lap-Platform/lap/tree/main/skills/lap"><img src="https://img.shields.io/badge/Claude%20Code-skill-orange?style=for-the-badge" alt="Claude Code Skill"></a> <a href="https://clawhub.ai/mickmicksh/lap"><img src="https://img.shields.io/badge/OpenClaw-skill-orange?style=for-the-badge" alt="OpenClaw Skill"></a> <a href="https://github.com/Lap-Platform/lap/tree/main/skills/cursor"><img src="https://img.shields.io/badge/Cursor-Rules-black?style=for-the-badge" alt="Cursor Rules"></a> <a href="https://github.com/Lap-Platform/lap/tree/main/skills/codex"><img src="https://img.shields.io/badge/Codex-skill-green?style=for-the-badge" alt="Codex Skill"></a> <a href="https://github.com/Lap-Platform/lap/pulls"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=for-the-badge" alt="PRs Welcome"></a> <a href="https://github.com/Lap-Platform/lap"><img src="https://img.shields.io/badge/%E2%AD%90_Star-this_repo-yellow?style=for-the-badge" alt="Star this repo"></a> <a href="https://lap.sh"><img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fregistry.lap.sh%2Fv1%2Fstats.json&query=%24.total_apis&label=Registry&suffix=%20APIs&color=blueviolet&style=for-the-badge" alt="APIs in Registry"></a> [Website](https://lap.sh) · [Registry](https://lap.sh) · [Benchmarks](https://github.com/Lap-Platform/Lap-benchmark-docs) · [Docs](docs/) [Request a Spec](https://github.com/Lap-Platform/lap/issues/new?template=spec-request.yml) · [Report a Bug](https://github.com/Lap-Platform/lap/issues/new?template=bug-report.yml) · [Request a Feature](https://github.com/Lap-Platform/lap/issues/new?template=feature-request.yml) </div> --- Without API documentation, LLM agents hallucinate endpoints, invent parameters, and guess auth flows -- scoring just **0.399 accuracy** in blind tests. LAP fixes this. One command gives your agent a verified, agent-native API spec -- jumping accuracy to **0.860**. And because LAP specs are up to 10x smaller than raw OpenAPI, you also save 35% on cost and run 29% faster. **Not minification** -- a purpose-built compiler with its own grammar. ### Proven in 500 blind runs across 50 APIs <picture> <source media="(prefers-color-scheme: dark)" srcset="assets/benchmark_savings.png"> <source media="(prefers-color-scheme: light)" srcset="assets/light/benchmark_savings.png"> <img alt="88% fewer tokens, 35% lower cost, same accuracy" src="assets/benchmark_savings.png" width="700"> </picture> LAP Lean scored **0.851** (vs 0.825 raw) while using **35% less cost** and **29% less time** -- same accuracy, far fewer tokens. > [Full benchmark report (500 runs, 50 specs, 5 formats)](https://lap-platform.github.io/Lap-benchmark-docs/results/LAP_Benchmark_v2_Full_Report.html) · [Benchmark methodology and data](https://github.com/Lap-Platform/Lap-benchmark-docs) ## Quick Start ```bash # Set up LAP in your IDE npx @lap-platform/lapsh init # Claude Code npx @lap-platform/lapsh init --target cursor # Cursor npx @lap-platform/lapsh init --target codex # Codex # Search the registry for an API npx @lap-platform/lapsh search payment # Download a spec npx @lap-platform/lapsh get stripe -o stripe.lap # Install an API skill npx @lap-platform/lapsh skill-install stripe # Or compile your own spec npx @lap-platform/lapsh compile api.yaml --lean ``` ### Use as an Agent Skill Install the LAP skill so your agent can search, compile, and manage APIs automatically: **Claude Code:** ```bash npx @lap-platform/lapsh init ``` **Cursor:** ```bash npx @lap-platform/lapsh init --target cursor ``` **Codex (CLI & VS Code extension):** ```bash npx @lap-platform/lapsh init --target codex ``` Codex agents use curl for registry operations (search, get, check) instead of npx -- instant in the sandbox. Skills install to `~/.codex/skills/`. Auto-update hooks are pre-configured for when Codex enables its hooks engine (`codex_hooks` feature flag is currently experimental). **OpenClaw:** install from [ClawHub](https://clawhub.ai/mickmicksh/lap) or copy manually: ```bash cp -r skills/lap ~/.openclaw/skills/lap ``` Once installed, agents auto-trigger the skill when working with APIs -- or invoke it directly with `/lap`. You can also install individual API skills for specific integrations: ```bash npx @lap-platform/lapsh skill-install stripe # Agent now knows the full Stripe API ``` > **Want to get listed?** [Register as a verified publisher](https://registry.lap.sh) and share your specs and skills with the registry. ```bash # Install globally (npm or pip) npm install -g @lap-platform/lapsh pip install lapsh ``` ## What You Get - 📦 **Registry** — browse and install 1500+ pre-compiled specs at [lap.sh](https://registry.lap.sh) - 🗜️ **5.2× median compression** on OpenAPI, up to 39.6× on large specs — **35% cheaper, 29% faster** ([benchmarks](BENCHMARKS.md)) - 📐 **Typed contracts** — `enum(a|b|c)`, `str(uuid)`, `int=10` prevent agent hallucination - 🔌 **6 input formats** — OpenAPI, GraphQL, AsyncAPI, Protobuf, Postman, Smithy - 🎯 **Zero information loss** — every endpoint, param, and type constraint preserved - 🔁 **Round-trip** — convert back to OpenAPI with `lapsh convert` - 🤖 **Skill generation** — `lapsh skill` creates agent-ready skills from any spec - 🔗 **Integrations** — LangChain, Context Hub, Python/TypeScript SDKs ## How It Works <img src="assets/pipeline.png" alt="How LAP works — 5 compression stages" width="800"> Five compression stages, each targeting a different source of token waste: | Stage | What it does | Savings | |-------|-------------|--------:| | **Structural removal** | Strip YAML scaffolding — `paths:`, `requestBody:`, `schema:` wrappers vanish | ~30% | | **Directive grammar** | `@directives` replace nested structures with flat, single-line declarations | ~25% | | **Type compression** | `type: string, format: uuid` → `str(uuid)` | ~10% | | **Redundancy elimination** | Shared fields extracted once via `@common_fields` and `@type` | ~20% | | **Lean mode** | Strip descriptions — LLMs infer meaning from well-named parameters | ~15% | <img src="assets/demo.gif" alt="LAP CLI demo" width="700"> ## Benchmarks **1,500+ specs · 5,228 endpoints · 4.37M → 423K tokens** <picture> <source media="(prefers-color-scheme: dark)" srcset="assets/format_comparison.png"> <source media="(prefers-color-scheme: light)" srcset="assets/light/format_comparison.png"> <img alt="Compression by API format" src="assets/format_comparison.png" width="600"> </picture> | Format | Specs | Median | Best | |--------|------:|-------:|-----:| | **OpenAPI** | 30 | **5.2×** | 39.6× | | **Postman** | 36 | **4.1×** | 24.9× | | **Protobuf** | 35 | **1.5×** | 60.1× | | **AsyncAPI** | 31 | **1.4×** | 39.1× | | **GraphQL** | 30 | **1.3×** | 40.9× | Verbose formats compress most — they carry the most structural overhead. Already-concise formats like GraphQL still benefit from type deduplication. ## The Ecosystem LAP is more than a compiler: | Component | What | Command | |-----------|------|---------| | **Init** | Set up LAP in your IDE | `lapsh init --target claude` | | **Search** | Find APIs in the registry | `lapsh search payment` | | **Get** | Download a spec by name | `lapsh get stripe` | | **Skill Install** | Install an API skill | `lapsh skill-install stripe --target claude` | | **Skill Uninstall** | Remove an installed skill | `lapsh skill-uninstall stripe` | | **Uninstall** | Fully remove LAP from your IDE | `lapsh uninstall --target claude` | | **Check** | Check installed skills for updates | `lapsh check [--target claude\|cursor\|codex]` | | **Diff** | Compare installed skill vs registry | `lapsh diff stripe` | | **Pin / Unpin** | Skip or resume update checks | `lapsh pin stripe` | | **Compiler** | Any spec → `.lap` | `lapsh compile api.yaml` | | **Skill Generator** | Create agent-ready skills from any spec | `lapsh skill api.yaml --install` | | **API Differ** | Detect breaking API changes | `lapsh diff old.lap new.lap` | | **Round-trip** | Convert LAP back to OpenAPI | `lapsh convert api.lap -f openapi` | | **Publish** | Share specs to the registry | `lapsh publish api.yaml --provider acme` | > **Claude Code, Cursor & Codex:** The `lap` skill is included -- run `lapsh init` and your agent can search, install, and manage API skills directly. Claude Code and Cursor support auto-update checks via SessionStart hooks. Codex hooks are pre-configured and will activate when the `codex_hooks` feature becomes stable. ## Supported Formats ```bash lapsh compile api.yaml # OpenAPI 3.x / Swagger lapsh compile schema.graphql # GraphQL SDL lapsh compile events.yaml # AsyncAPI lapsh compile service.proto # Protobuf / gRPC lapsh compile collection.json # Postman v2.1 lapsh compile model.smithy # AWS Smithy ``` Format is auto-detected. Override with `-f openapi|graphql|asyncapi|protobuf|postman|smithy`. ## Top Compressions <picture> <source media="(prefers-color-scheme: dark)" srcset="assets/compression_bar_chart.png"> <source media="(prefers-color-scheme: light)" srcset="assets/light/compression_bar_chart.png"> <img alt="Top 15 OpenAPI APIs by compression ratio" src="assets/compression_bar_chart.png" width="650"> </picture> ## Integrations ```python # LangChain from lap.middleware import LAPDocLoader docs = LAPDocLoader("stripe.lap").load() ``` LangChain, Context Hub, and Python/TypeScript SDKs. See [integration docs](docs/guide-integrate.md). ## FAQ <details> <summary>Why do agents hallucinate API calls?</summary> Because they have no way to find the spec, and even if they could, it's a million tokens of YAML written for humans. Agents without specs score 0.399 accuracy -- wrong 60% of the time. They hallucinate endpoint paths, send invalid types, and miss auth. Give them a LAP spec and accuracy jumps to 0.860. The spec doesn't make the agent smarter. It makes guessing unnecessary. </details> <details> <summary>How is this different from OpenAPI?</summary> LAP doesn't replace OpenAPI — it compiles FROM it. Like TypeScript → JavaScript: you keep your OpenAPI specs, your existing tooling, everything. LAP adds a compilation step for the LLM runtime. </details> <details> <summary>How is this different from MCP?</summary> MCP defines how agents discover and invoke tools (the plumbing). LAP compresses the documentation those tools expose (the payload). They're complementary — LAP can compress MCP tool schemas. </details> <details> <summary>Why not just minify the JSON?</summary> Minification removes whitespace — that's ~10% savings. LAP performs semantic compression: flattening nested structures, deduplicating schemas, compressing type declarations, and stripping structural overhead. That's 5-40× savings. Different class of tool. </details> <details> <summary>What about prompt caching?</summary> Use both. Compress with LAP first, then cache the compressed version. LAP reduces the first-call cost and frees context window space. Caching reduces repeated-call cost. They stack. </details> <details> <summary>Will LLMs understand this format?</summary> Yes. LAP uses conventions LLMs already know — `@directive` syntax, `{name: type}` notation, HTTP methods and paths. In blind tests, agents produce identical correct output from LAP and raw OpenAPI. The typed contracts actually reduce hallucination. </details> <details> <summary>What if token costs keep dropping?</summary> Cost is the least important argument. The core value is typed contracts: `enum(succeeded|pending|failed)` prevents hallucinated values regardless of token price. Plus: formal grammar (parseable by code, not just LLMs), schema diffing, and faster inference from fewer input tokens. </details> ## Contributing See [CONTRIBUTING.md](CONTRIBUTING.md). CI runs on every push and PR -- Python 3.11/3.12 and Node 18/20. **Python** (18 test files, 1,083 tests): | Suite | What it covers | |-------|----------------| | **Compilers** | OpenAPI, GraphQL, AsyncAPI, Protobuf, Postman, Smithy | | **Round-trip** | Compile → parse → re-emit across 190+ specs | | **Skill & Tool** | Skill compiler, tool format, MCP manifest, skill updates | | **Agent** | Agent implementation verification (enum, nested, array handling) | | **Differ** | Breaking change detection, compatibility checking | | **CLI** | Auth, search, version, integration (subprocess) | | **Quality** | Regression tests for compiler bug fixes | **TypeScript SDK** (14 test files -- full compiler parity): | Suite | What it covers | |-------|----------------| | **Compilers** | OpenAPI, GraphQL, AsyncAPI, Protobuf, Postman, Smithy, AWS SDK | | **Parser & Serializer** | LAP text round-trip in TypeScript | | **Skills** | Skill compilation, LLM integration | | **CLI & Auth** | CLI commands, credential management | | **Search** | Registry search helpers | ```bash git clone https://github.com/Lap-Platform/lap.git cd lap # Python tests pip install -e ".[dev]" pytest # TypeScript SDK tests cd sdks/typescript npm ci && npm test ``` ## License [Apache 2.0](LICENSE) — See [NOTICE](NOTICE) for attribution. --- <div align="center"> **[lap.sh](https://lap.sh)** · Built by the LAP team </div>

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