Compiler Explorer

Compiler Explorer (godbolt.org) is an interactive online compiler explorer that lets users write source code in many programming languages and view the generated assembly, intermediate representation, and other compiler outputs in real time. It supports a wide range of compilers, versions, and options, providing features such as side‑by‑side comparison, diff view, and integration with tools like Compiler Explorer plugins. The service is open‑source, community‑driven, and widely used for learning, debugging, and performance analysis across C++, Rust, Go, and many other languages.

Compiler Explorer is listed with 1 API on the APIs.io network. Tagged areas include Compilers, Explorer, Assembly, Open Source, and Education.

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4.5/100 minimal Agent 3/100 human only Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 API

Compilers Explorer Assembly Open Source Education Company

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 4.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.5 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Education & Research regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 0.0 — up to +20.0 composite points Ask about this →
Access Clarity scores 0.0 — up to +20.0 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/godbolt-org/apis.yml: open an issue on github.com/api-evangelist/godbolt-org to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Compiler Explorer API

API for Compiler Explorer providing compilation, language, and library listings via MCP.

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Compiler Explorer Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: godbolt-org
name: Compiler Explorer
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-13'
  method: derived
image: https://github.com/compiler-explorer/infra/blob/main/logo/favicon.png?raw=true
description: Compiler Explorer (godbolt.org) is an interactive online compiler explorer that lets users write source code
  in many programming languages and view the generated assembly, intermediate representation, and other compiler outputs in
  real time. It supports a wide range of compilers, versions, and options, providing features such as side‑by‑side comparison,
  diff view, and integration with tools like Compiler Explorer plugins. The service is open‑source, community‑driven, and
  widely used for learning, debugging, and performance analysis across C++, Rust, Go, and many other languages.
url: https://artifacts.apis.io/godbolt-org/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- Compilers
- Explorer
- Assembly
- Open Source
- Education
- Company
tags_raw:
- Compiler
- Explorer
- Assembly
- OpenSource
- Education
- Company
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/godbolt-org-hosts.yml
- type: Vendors
  url: vendors/godbolt-org-vendors.yml
- type: DomainSecurity
  url: security/godbolt-org-domain-security.yml
- type: Website
  url: https://godbolt.org/
- type: GitHubOrganization
  url: https://github.com/compiler-explorer
apis:
- name: Compiler Explorer API
  description: API for Compiler Explorer providing compilation, language, and library listings via MCP.
  humanURL: https://godbolt.org/mcp
  baseURL: https://api.godbolt.org
  aid: godbolt-org:compiler-explorer-api
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 7
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Compiler Explorer API — frequently asked questions

Does Compiler Explorer have an API?

Yes. APIs.io lists 1 API from Compiler Explorer, including Compiler Explorer API.

Is the Compiler Explorer API ready for AI agents?

Compiler Explorer has a Kin Score of 4.5 out of 100 (minimal) and an Agent Readiness score of 3.1 (human-only), scored by API Evangelist on 2026-11-13.

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apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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