Green Hills Software
Green Hills Software is a privately held embedded software company founded in 1982 by Dan O'Dowd and Carl Rosenberg and headquartered in Santa Barbara, California. It builds safety- and security-certified real-time operating systems (INTEGRITY, INTEGRITY-178 tuMP, u-velOSity), embedded hypervisors (INTEGRITY Multivisor, u-visor), optimizing C/C++/Ada/Fortran compilers, the MULTI and AdaMULTI integrated development environments, the TimeMachine back-in-time debug suite, the DoubleCheck static analyzer, the Green Hills Probe hardware debugger, and networking, file-system and USB middleware. Its customers ship these components inside aerospace, defense, automotive, medical, industrial, rail, telecommunications and consumer devices. Green Hills is a toolchain and operating-system vendor rather than an API provider: the programmable interfaces it ships are in-product C/C++, POSIX and MULTI-Python scripting APIs delivered with a licensed installation and documented in manuals distributed with the product, and its technical support portal at support.ghs.com requires an account. No public web API, developer portal, or machine-readable API description was found on any Green Hills host during enrichment.
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 Green Hills Software the way a machine reads it — 3 machine-readable artifacts, 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 — Green Hills Software scores 13.0/100 (emerging), with a separate agent-readiness read of 3/100 (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.
Why this profile is thin
Green Hills Software ships an embedded RTOS and compiler toolchain as licensed end-user products and runs no developer program at all - no API host, no developer portal, no SDK in any public registry, and its only technical documentation surface (support.ghs.com) 302s every FAQ, application-note and download path to an email-link login.
This is an honest zero, not a gap in our research. Green Hills Software does not appear to expose an API, so there is nothing here for us to index and nothing for them to fix.
What we probed
https://www.ghs.com/openapi.json→ HTTP 404https://www.ghs.com/.well-known/api-catalog→ HTTP 404https://support.ghs.com/faq/→ HTTP 302https://www.ghs.com/pricing.html→ HTTP 404
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 2026-08-24 · rubric v0.12.1
Put this on your own site. The badge is drawn live from Green Hills Software's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/green-hills-software/"
title="Green Hills Software on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/green-hills-software.svg"
alt="Green Hills Software Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/green-hills-software/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/green-hills-software/"
title="Green Hills Software on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/green-hills-software/card.svg"
alt="Green Hills Software Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Green Hills Software
Each block below is one kind of artifact we hold for Green Hills Software. 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.
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 things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
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.
Green Hills Software Rate Limits
RATE LIMITSSecurity 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.
Resources
Every other property we hold for Green Hills Software — 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.
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Access & Security 2
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 3
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 6
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/green-hills-software · machine-readable index on apis.io
This is an independent, third-party profile of Green Hills Software, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.