TLA Plus Foundation

TLC Model Checker

TLC is the primary model checker for specifications written in TLA+. It can be run from the command line using tla2tools.jar or consumed as a Java dependency via Maven from central.sonatype.org. Requires Java 11+. The current stable release is v1.7.4 (The Xenophanes release) with pre-release v1.8.0 (The Clarke release) available.

GitHub

Documentation

📖
Documentation
https://tla.msr-inria.inria.fr/tlatoolbox/doc/model/executing-tlc.html

SDKs

📦
GitHubRepository
https://github.com/tlaplus/tlaplus

Other Resources

🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/tla-plus-foundation/refs/heads/main/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/tlc-model-checker"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: tla-plus-foundation:tlc-model-checker
name: TLC Model Checker
description: TLC is the primary model checker for specifications written in TLA+. It can be run from the
  command line using tla2tools.jar or consumed as a Java dependency via Maven from central.sonatype.org.
  Requires Java 11+. The current stable release is v1.7.4 (The Xenophanes release) with pre-release v1.8.0
  (The Clarke release) available.
humanURL: https://github.com/tlaplus/tlaplus
tags:
- Model Checking
- Formal Verification
- Java
properties:
- type: Documentation
  url: https://tla.msr-inria.inria.fr/tlatoolbox/doc/model/executing-tlc.html
- type: GitHubRepository
  url: https://github.com/tlaplus/tlaplus