TLA Plus Foundation
The TLA+ Foundation is an independent nonprofit hosted by the Linux Foundation, dedicated to fostering the adoption of the TLA+ specification language in industry, academia, and education. Created by Leslie Lamport, TLA+ is a high-level formal specification language based on set theory and temporal logic for modeling concurrent and distributed systems. Inaugural members include Amazon Web Services (AWS) and Oracle. The Foundation funds research and development, maintains the TLC model checker, TLAPS proof system, and TLA+ Toolbox IDE, and coordinates community resources including the VS Code extension, CommunityModules, and formal verification examples. The current stable release is v1.7.4 (The Xenophanes release).
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles TLA Plus Foundation the way a machine reads it — 30 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — TLA Plus Foundation scores 24.0/100 (emerging), with a separate agent-readiness read of 7/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile TLA Plus Foundation
Each block below is one kind of artifact we hold for TLA Plus Foundation. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
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 cent...
TLAPS Proof System
The TLA+ Proof Manager (TLAPS) is a proof system for TLA+ specifications, enabling formal mathematical proofs of system properties. It integrates with back-end provers and suppo...
TLA+ Toolbox IDE
The TLA+ Toolbox is a full-featured IDE for writing TLA+ specifications, running TLC model checks, and managing proofs with TLAPS. Available as a standalone Eclipse-based applic...
TLA+ VS Code Extension
The official TLA+ extension for Visual Studio Code providing language support, syntax highlighting, TLC integration, and model checking from within the VS Code editor.
TLA+ Community Modules
A curated collection of TLA+ snippets, operators, and modules contributed by the TLA+ community, providing reusable formal specification components for common patterns in concur...
TLA+ Specification Examples
A collection of TLA+ specifications of varying complexity covering distributed algorithms, consensus protocols, concurrent data structures, and system models. Includes reference...
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Tla Plus Foundation Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Features 8
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
TLC Model Checker
Explicit-state model checker for TLA+ specifications supporting both exhaustive verification and simulation modes.
TLAPS Proof System
Interactive proof manager for formally verifying TLA+ specifications against mathematical proofs.
TLA+ Toolbox IDE
Eclipse-based IDE for writing, model-checking, and managing TLA+ specifications with TLAPS integration.
VS Code Extension
Official Visual Studio Code extension providing TLA+ language support and TLC integration.
Community Modules
Reusable TLA+ operator and module library contributed and maintained by the community.
Grant Program
Foundation grants funding research and industry initiatives to advance TLA+ specification and tool adoption.
Maven Package Distribution
TLA+ tools available as Maven Java dependency from central.sonatype.org for programmatic integration.
PlusPy Python Interpreter
Python interpreter for executing TLA+ specifications, enabling Python-based formal modeling workflows.
Scroll within the panel for all 8 ·
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Use Cases 6
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Distributed Algorithm Verification
Model-check distributed consensus, replication, and coordination protocols against safety and liveness properties.
Concurrent System Specification
Formally specify concurrent data structures, lock-free algorithms, and parallel systems using TLA+.
Protocol Design and Validation
Use TLA+ to design and validate network protocols, database transactions, and API contracts before implementation.
Tooling Integration via Java API
Embed TLC model checking in CI/CD pipelines or custom tools using the tla2tools Maven dependency.
Education and Training
Use the TLA+ Toolbox, VS Code extension, and Leslie Lamport's video course to learn formal methods.
Safety and Liveness Proof
Use TLAPS to produce machine-checked proofs of safety and liveness properties for critical systems.
Integrations 6
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
Amazon Web Services
Founding member; AWS uses TLA+ for distributed systems design including DynamoDB and S3 protocols.
Oracle
Founding member; uses TLA+ for database and distributed system specification.
Microsoft
Early TLA+ adopter for Azure and distributed systems formal verification.
Visual Studio Code
Official VS Code extension for TLA+ editing and model checking.
Maven Central
TLA+ tools distributed as Java Maven dependency for programmatic integration.
Linux Foundation
Parent organization hosting the TLA+ Foundation as an independent nonprofit project.
Resources
Every other property we hold for TLA Plus Foundation — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Company 1
The organization behind the API
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