Godbolt Compiler Explorer API

Name: Compiler Explorer API
Brand: Compiler Explorer API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentDeveloper ToolsTesting Qanone13 EndpointsREST

For Agents

Compile and analyse source code with real compilers, list available languages and compilers, format code, and look up assembly opcode documentation. Open and unauthenticated.

Install Jentic One Beta

Connect the Compiler Explorer API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Compiler Explorer API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fgodbolt.org%2Fgodbolt" | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fgodbolt.org%2Fgodbolt" | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Compiler Explorer API.

List supported programming languages and the compilers available for each

Compile a source file with a specific compiler version and inspect the generated assembly

Run a CMake build with a chosen compiler and capture the output

GET STARTED

Start building with Compiler Explorer API

Explore with Jentic One

View OpenAPI Document

Jentic publishes the only available OpenAPI specification for Compiler Explorer API, keeping it validated and agent-ready. The Compiler Explorer (godbolt.org) API exposes the same compilation and code-formatting service that powers the popular interactive site at godbolt.org. It lists supported languages, compilers, libraries, and tools; compiles and CMake-builds source code against any registered compiler; formats source through configurable formatters; resolves shortlink IDs; and looks up documentation for individual assembly opcodes. The API is unauthenticated and ideal for AI agents that need to validate or analyse code against real compilers.

Use Cases

Patterns agents use Compiler Explorer API for, with concrete tasks.

★ Code Review Assembly Inspection

Reviewers paste a hot-path function into the Compiler Explorer API and request the generated assembly to confirm whether a refactor preserved or improved code generation. POST /compiler/{compilerId}/compile takes the source plus compiler flags and returns assembly output, diagnostics, and timing.

Compile the provided C++ function with GCC 13 and -O2 and return the generated x86-64 assembly.

Cross-Compiler Compatibility Check

Library maintainers test a small reproduction across many compilers to confirm a fix works under GCC, Clang, and MSVC. The /compilers and /compilers/{languageId} endpoints enumerate every available compiler and version, so an agent can iterate the same source file across the matrix.

Compile the test snippet against the latest 5 GCC versions and the latest 5 Clang versions and report which fail.

Code Formatting at Scale

An agent normalises C, C++, or Rust source files to the team's house style by calling /format/{formatter}. The formatter is chosen from /formats and applied consistently across pull requests so reviewers focus on logic instead of whitespace.

Format every staged C++ file in the PR using clang-format with the LLVM style and write the results back.

AI Agent Code Verification

An AI coding agent uses Jentic to compile and check its generated code before returning it to the user. The agent searches for the compile operation, loads the schema, posts the candidate source, and only proposes fixes that compile cleanly under the requested compiler.

Search Jentic for 'compile c++ with godbolt', load the schema, compile the agent's draft snippet with GCC 13, and refine until diagnostics are empty.

Key Endpoints

13 endpoints — jentic publishes the only available openapi specification for compiler explorer api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/languages

List supported programming languages

GET

/compilers

List all available compilers

GET

/compilers/{languageId}

List compilers for a specific language

POST

/compiler/{compilerId}/compile

Compile source and return assembly

POST

/compiler/{compilerId}/cmake

Run a CMake build

GET

/formats

List available source formatters

POST

/format/{formatter}

Format a source body with a chosen formatter

GET

/asm/{instructionSet}/{opcode}

Look up an assembly opcode's documentation

GET

/languages

List supported programming languages

GET

/compilers

List all available compilers

GET

/compilers/{languageId}

List compilers for a specific language

POST

/compiler/{compilerId}/compile

Compile source and return assembly

POST

/compiler/{compilerId}/cmake

Run a CMake build

Why Jentic?

What agents get from Jentic-routed access to this vendor.

Setup

Wiring Compiler Explorer by hand means calling godbolt.org/api directly, discovering which compilers back each language, and formatting compile and cmake request bodies yourself. Through Jentic you install once, import Compiler Explorer from the API Directory, and your agent calls it with unified logging alongside your authenticated APIs.

Permission scoping

Compiler Explorer is unauthenticated and read or compute only, so scope the agent to the operations it needs, such as listing compilers or compiling a source snippet. You choose the operations it may call, so it can be limited to compilation and formatting without the assembly opcode lookup unless you add it.

Credential isolation

Compiler Explorer needs no credential, so your Jentic One instance stores none for it. Calls are proxied through Jentic for unified logging and rate-limit handling alongside your authenticated APIs.

Intent-based discovery

Agents search Jentic by intent such as 'compile c++ code' or 'list available compilers', and Jentic returns the matching Compiler Explorer operation with its input schema so the agent calls the right endpoint without reading the project's Markdown docs.

FAQs

Specific to using Compiler Explorer API through Jentic.

Why is there no official OpenAPI spec for Compiler Explorer API?

Compiler Explorer documents its endpoints in a Markdown file inside the GitHub repository but does not ship an OpenAPI specification. Jentic generates and maintains this spec so AI agents and developers can call Compiler Explorer API via structured tooling. It is validated against the live API and kept up to date. Get started with Jentic One, the self-hosted execution layer.

What authentication does the Compiler Explorer API use?

The API is unauthenticated. There is no API key or bearer token required for any endpoint. Jentic still proxies the call so usage analytics and rate-limit handling stay consistent across APIs.

Can I compile code with the Compiler Explorer API?

Yes. POST /compiler/{compilerId}/compile compiles a source body with the chosen compiler and flags and returns assembly output, diagnostics, and execution metadata. POST /compiler/{compilerId}/cmake performs a CMake build.

What are the rate limits for the Compiler Explorer API?

The OpenAPI spec does not declare numeric rate limits. The hosted godbolt.org service applies fair-use throttling; in practice, batch compile requests sequentially and back off on HTTP 429 responses.

How do I look up an assembly opcode through Jentic?

Run a Jentic search for 'godbolt opcode docs', load the schema for GET /asm/{instructionSet}/{opcode}, and execute it with the instruction set and opcode name. Install with pip install jentic and chain search, load, and execute.

Does the Compiler Explorer API support code formatting?

Yes. GET /formats lists available formatters and POST /format/{formatter} applies the chosen formatter to a source body, with style options for tools like clang-format and rustfmt.

Can I limit what my agent is allowed to do with the Compiler Explorer API?

Yes. Because you run Jentic One yourself, your own rules decide which Compiler Explorer operations the agent may call, and you can scope it down to just the ones it needs. For example, you can allow listing languages and compilers and compiling source through POST /compiler/{compilerId}/compile, while withholding the CMake build, the POST /format/{formatter} formatter, or the GET /asm/{instructionSet}/{opcode} opcode lookup. Since the API is unauthenticated and read or compute only, no credentials are involved, so scoping is purely about which endpoints you let the agent reach.

Godbolt Compiler Explorer API

Connect the Compiler Explorer API to your agent

Capabilities

Start building with Compiler Explorer API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs