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Buildkite

Buildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with self-hosted or Buildkite-Hosted agents that run jobs on customer-controlled infrastructure. The platform spans three core products — Pipelines, Test Engine, and Package Registries — and exposes them through a v2 REST API, a Relay-compliant GraphQL API at graphql.buildkite.com/v1, an Agent API at agent.buildkite.com/v3 consumed by the open-source Go agent, webhooks, and an official MCP server that surfaces those APIs to AI coding agents. Customers route work to specific agent pools through clusters and queues, define pipelines as YAML with dynamic uploads, and integrate with the major source control, cloud, identity, secrets, and observability vendors.

agent native

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Buildkite the way a machine reads it — 97 machine-readable artifacts across 23 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 — Buildkite scores 71.9/100 (exemplar), with a separate agent-readiness read of 71/100 (agent native). 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 Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 71.9/100 · exemplar
Contract Quality 16.5 / 25
Developer Ergonomics 14.3 / 20
Commercial Clarity 15.8 / 20
Operational Transparency 6.2 / 13
Governance 10.4 / 12
Discoverability 8.8 / 10
Agent readiness — 71/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3

How we profile Buildkite

Each block below is one kind of artifact we hold for Buildkite. 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 23

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.

Buildkite GraphQL API

GraphQL endpoint that returns deeply nested data on organizations, pipelines, builds, jobs, agents, clusters, queues, teams, audit events, suites, test executions, and package r...

Buildkite Agent API

Backplane consumed by the Buildkite Agent (open source, Go) to register, deregister, accept and finish jobs, upload artifacts, stream job logs, and emit metrics for cluster auto...

Buildkite Webhooks

Outbound HTTP notifications fired in response to build, job, agent, ping, deployment, and package events across Pipelines, Test Engine, and Package Registries. Verified with the...

Buildkite MCP Server

Official Model Context Protocol server that exposes Buildkite REST API surfaces (pipelines, builds, jobs, agents, artifacts, annotations) as MCP tools and toolsets for AI coding...

Buildkite Access Token API

The Access Token API from Buildkite — 1 operation(s) for access token.

Buildkite Agent Tokens API

The Agent Tokens API from Buildkite — 1 operation(s) for agent tokens.

Buildkite Agents API

The Agents API from Buildkite — 3 operation(s) for agents.

Buildkite Annotations API

The Annotations API from Buildkite — 1 operation(s) for annotations.

Buildkite Artifacts API

The Artifacts API from Buildkite — 1 operation(s) for artifacts.

Buildkite Builds API

The Builds API from Buildkite — 4 operation(s) for builds.

Buildkite Clusters API

The Clusters API from Buildkite — 1 operation(s) for clusters.

Buildkite Emojis API

The Emojis API from Buildkite — 1 operation(s) for emojis.

Buildkite Jobs API

The Jobs API from Buildkite — 2 operation(s) for jobs.

Buildkite Meta API

The Meta API from Buildkite — 1 operation(s) for meta.

Buildkite Metrics API

The Metrics API from Buildkite — 1 operation(s) for metrics.

Buildkite Organizations API

The Organizations API from Buildkite — 2 operation(s) for organizations.

Buildkite Pipeline Templates API

The Pipeline Templates API from Buildkite — 1 operation(s) for pipeline templates.

Buildkite Pipelines API

The Pipelines API from Buildkite — 2 operation(s) for pipelines.

Buildkite Queues API

The Queues API from Buildkite — 1 operation(s) for queues.

Buildkite Rules API

The Rules API from Buildkite — 1 operation(s) for rules.

Buildkite Stacks API

The Stacks API from Buildkite — 1 operation(s) for stacks.

Buildkite Teams API

The Teams API from Buildkite — 1 operation(s) for teams.

Buildkite User API

The User API from Buildkite — 1 operation(s) for user.

Scroll within the panel for all 23 ·

Postman Collections 1

A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.

Ready-to-run Postman collections for exercising this provider's APIs.

Open Collections 2

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Buildkite Agent API

OPEN COLLECTION

Buildkite REST API

OPEN COLLECTION

Arazzo Workflows 9

Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.

Multi-step API workflows described with the Arazzo specification.

Buildkite Build Failure Triage

Inspect a finished build, then pull its annotations and artifacts for triage.

ARAZZO

Buildkite Cancel Running Build

Find the latest running build on a pipeline and cancel it.

ARAZZO

Buildkite Collect Build Artifacts

Look up a build, confirm it finished, then list its artifacts.

ARAZZO

Buildkite Fetch Job Log

Read a build, pick a finished job, and fetch its log output.

ARAZZO

Buildkite Provision Pipeline And First Build

Create a pipeline in an organization, then trigger its first build.

ARAZZO

Buildkite Rebuild Latest Build

Find the most recent build on a pipeline, rebuild it, then poll the new build.

ARAZZO

Buildkite Retry Failed Job

Find a failed job in a build, retry it, then poll the build to completion.

ARAZZO

Buildkite Stop Disconnected Agent

List agents, inspect one, and stop it when it is no longer connected.

ARAZZO

Buildkite Trigger And Poll Build

Create a build on a pipeline, then poll until it reaches a terminal state.

ARAZZO

Scroll within the panel for all 9 ·

MCP Servers 1

Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.

Model Context Protocol servers that expose these APIs to AI agents.

GraphQL 1

Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.

GraphQL schemas published by this provider.

Buildkite GraphQL API

GraphQL endpoint that returns deeply nested data on organizations, pipelines, builds, jobs, agents, clusters, queues, teams, audit events, suites, test executions, and package r...

GRAPHQL

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.

Buildkite Com Rate Limits

0 limits

RATE LIMITS

FinOps 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 23

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.

Hybrid CI/CD — self-hosted agents on customer infrastructure plus optional Buildkite Hosted Agents
Pipelines as YAML with dynamic pipeline upload from inside jobs
Open source agent (Go) running on Linux, macOS, Windows, FreeBSD
Clusters and Queues for routing jobs to specific agent pools
Pipeline Templates for standardizing pipelines across teams
Rules engine for organizational policies and automation
Annotations, artifacts, and job logs as first-class API resources
Buildkite Hosted Agents — Linux, Mac M4, with cache volumes and tunable vCPU sizes
Test Engine with flaky test management, real-time test analytics, and intelligent test splitting
Test Engine duration-threshold monitor for long-running test alerts
Package Registries for npm, PyPI, RubyGems, Maven, Container, Debian, RPM, Terraform, Helm
SLSA provenance, license checks, and threat scanning on Enterprise Package Registries
OIDC and OAuth Token Exchange (RFC 8693) for short-lived API tokens from identity providers
bktec build tooling with automatic OIDC token generation
Per-user API rate limits with org-wide caps
GraphQL Portals for scoped, schema-filtered API access
Batch retry API for failed jobs with optional state filtering
GitHub webhook trigger expansion (PR reviews, releases, issue comments, deployment status)
Build page redesign with searchable job list and state-based filters
SCIM, SAML, ADFS for Enterprise identity
Audit logs and build exports for compliance and FinOps
Official MCP server for AI coding agent integration
Buildkite Skills for Claude Code and Cursor

Scroll within the panel for all 23 ·

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Buildkite Com Context

34 classes · 5 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Buildkite API Rules

5 rules · 4 warnings

SPECTRAL

Buildkite API Rules

7 rules · 5 errors · 2 warnings

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Buildkite Agent

15 properties

JSON SCHEMA

Buildkite Build

20 properties

JSON SCHEMA

Buildkite Pipeline

20 properties

JSON SCHEMA

JSON Structure 1

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Buildkite Com Pipeline Structure

0 properties

JSON STRUCTURE

Examples 3

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Security Posture 3

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.

Buildkite Com Authentication

http/oauth2 · 3 schemes

SECURITY

Buildkite Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.

OAuth scopes governing access to this provider's APIs.

Buildkite Com Scopes

42 scopes

42 scopes

SCOPES

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Buildkite Com Agentic Access

32 operations · 9 acting · 2 human-in-the-loop

32 operations · 9 acting

AGENTIC

Integrations 19

Pre-built integrations with other platforms tell you where this provider already fits in a stack.

Pre-built integrations with other platforms and tools.

GitHub, GitLab, Bitbucket source control providers
GitHub App, Apps for GitLab and Bitbucket Cloud
AWS (Elastic CI Stack, EC2, ECS, EKS, Lambda autoscaler)
Google Cloud (GCE, GKE)
Microsoft Azure (AKS, Azure DevOps)
Kubernetes via agent-stack-k8s
Terraform provider community modules
Slack, Microsoft Teams, email notifications
PagerDuty, Opsgenie, Datadog observability
Honeycomb, OpenTelemetry tracing
1Password, HashiCorp Vault, AWS Secrets Manager secrets
Sentry, Rollbar error tracking
Snyk, Aikido, Semgrep security scanning
Docker, Docker Hub, ECR, GCR, GHCR container registries
Test Engine integrations for RSpec, Jest, pytest, JUnit, Go, Cypress, Playwright
Package Registries for npm, PyPI, RubyGems, Maven, Container, Debian, RPM, Terraform, Helm
OIDC integrations with AWS, GCP, Azure, HashiCorp Vault
OAuth Token Exchange (RFC 8693) for identity provider integrations
Buildkite MCP Server for Claude, Cursor, and other AI coding agents

Scroll within the panel for all 19 ·

Resources

Every other property we hold for Buildkite — 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.

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Company 1

The organization behind the API

Other 2

Properties that don't map to a standard resource type

← All providers · Data indexed from github.com/api-evangelist/buildkite-com · machine-readable index on apis.io