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Full detail: Where this data comes from
Blacksmith runs your GitHub Actions up to 2x faster at half the cost on a fleet of modern gaming-CPU bare metal, booting ephemeral Firecracker microVMs in under three seconds. It is a drop-in replacement integrated as a GitHub App and selected via runs-on runner tags, with a co-located CI cache, 40x faster Docker layer caching, sticky disks, an observability dashboard, and a Testbox CLI. Blacksmith does not publish a general-purpose public REST API - integration is GitHub-App, YAML runner-tag, and GitHub Actions based.
APIs.json: https://raw.githubusercontent.com/api-evangelist/blacksmith-sh/refs/heads/main/apis.yml
- CI/CD
- GitHub Actions
- Runners
- Caching
- Docker
- Created: 2026-06-20
- Modified: 2026-06-20
Drop-in faster GitHub-hosted runner replacement selected by changing the runs-on tag (e.g. blacksmith-2vcpu-ubuntu-2404). Linux/Windows jobs run in ephemeral Firecracker microVMs; x64, ARM64, and macOS (Apple Silicon M4) families are offered in 2-32 vCPU sizes. Configured via the GitHub App and YAML workflow, not a programmatic REST API.
- Human URL: https://docs.blacksmith.sh/blacksmith-runners/overview
- Base URL:
https://app.blacksmith.sh
- GitHub Actions
- Runners
- CI/CD
- Firecracker
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Accelerated Docker image builds via Blacksmith's BuildKit and the useblacksmith/build-push-action and useblacksmith/setup-docker-builder GitHub Actions, reusing cached layers on sticky disks to rebuild only what changed - up to 40x faster. Used as GitHub Actions in a workflow, not via a public REST API.
- Human URL: https://docs.blacksmith.sh/blacksmith-caching/docker-builds
- Base URL:
https://app.blacksmith.sh
- Docker
- BuildKit
- Layer Caching
- Builds
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Co-located CI cache that transparently backs official GitHub and popular third-party cache actions (e.g. actions/cache, useblacksmith/cache) at roughly 400MB/s, plus Sticky Disks, container init pre-hydration, and Git checkout caching. Activated by running cache GitHub Actions on Blacksmith runners, not via a public REST API.
- Human URL: https://docs.blacksmith.sh/blacksmith-caching/dependencies-actions
- Base URL:
https://app.blacksmith.sh
- Cache
- Sticky Disks
- Dependencies
- Artifacts
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Command-line interface (beta) that lets coding agents run CI against local changes instantly - blacksmith testbox warmup/run/status dispatch a workflow to a warm microVM, rsync local changes, and execute commands over SSH. The CLI is the programmatic surface; there is no documented public REST API.
- Human URL: https://docs.blacksmith.sh/blacksmith-testbox/cli
- Base URL:
https://app.blacksmith.sh
- CLI
- Testbox
- Coding Agents
- Beta
- Documentation
- API Reference
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Web dashboard at app.blacksmith.sh for organization setup, runner and cache management, and observability - CI analytics, run history, logs, machine metrics, monitors, SSH access, and test analytics. A management console, not a documented public REST API.
- Human URL: https://docs.blacksmith.sh/blacksmith-observability/dashboard
- Base URL:
https://app.blacksmith.sh
- Dashboard
- Observability
- Analytics
- Management
- Documentation
- Console
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
FN: Kin Lane Email: kin@apievangelist.com