Semaphore

Semaphore is a cloud-based CI/CD platform designed for high-performance engineering teams, providing fast and reliable continuous integration and continuous delivery pipelines. The platform offers a comprehensive REST API that enables programmatic management of pipelines, workflows, jobs, secrets, projects, and deployment targets for software delivery automation. Semaphore supports OAS 3.0-compliant API definitions with Swagger documentation, covering resources such as artifacts, test results, self-hosted agents, and build insights. Teams can use the API to integrate with external tools, build custom interfaces, trigger promotions, and automate their entire software delivery lifecycle.

Semaphore publishes 11 API contracts indexed on the APIs.io network, including Dashboards API, DeploymentTargets API, Notifications API, and 8 more. Tagged areas include CI/CD, Continuous Integration, Continuous Delivery, Pipelines, and Workflows.

The Semaphore catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Semaphore’s developer surface includes authentication, documentation, engineering blog, pricing, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

41.4/100 developing ▬ flat Agent 33/100 agent ready Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

CI/CD Continuous Integration Continuous Delivery Pipelines Workflows DevOps Build Automation Software Delivery Deployment Artifacts Developer Tools

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Software Release & Deployment Management

BC-4210

DeploymentTargetsPipelinesProjectSecretsSecretsTasksWorkflows

GET /pipelines GET /pipelines/{pipeline_id} GET /pipelines/{pipeline_id}/describe_topology POST /pipelines/{pipeline_id}/partial_rebuild

Kin Score

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

Composite quality — 41.4/100 · developing

Contract Quality 11.9 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 3.8 / 15

Operational Transparency 3.5 / 10

Contract Governance 2.5 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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 Horizontal (data, software, accessibility, platform) 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship 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 →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →

7 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 23.8 — up to +15.2 composite points Ask about this →
Access Clarity scores 25.5 — up to +14.9 composite points Ask about this →
Contract Quality scores 63.5 — up to +9.1 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/semaphore/apis.yml: open an issue on github.com/api-evangelist/semaphore 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.

OpenAPI

measured — observed by APIs.io (published)

APIs 11

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

Semaphore Dashboards API

Dashboard management

Semaphore DeploymentTargets API

Deployment target management

Semaphore Notifications API

Notification management

Semaphore Pipelines API

Pipeline management

Semaphore Projects API

Project management

Semaphore ProjectSecrets API

Project-level secrets

Semaphore Secrets API

Organization-level secrets

Semaphore SelfHostedAgents API

Self-hosted agent management

Semaphore SelfHostedAgentTypes API

Self-hosted agent type management

Semaphore Tasks API

Task management

Semaphore Workflows API

Workflow management

Scroll for all 11

Open Collections 11

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

Semaphore Public Dashboards API

OPEN COLLECTION

Semaphore Public Dashboards DeploymentTargets API

OPEN COLLECTION

Semaphore Public Dashboards Notifications API

OPEN COLLECTION

Semaphore Public Dashboards Pipelines API

OPEN COLLECTION

Semaphore Public Dashboards Projects API

OPEN COLLECTION

Semaphore Public Dashboards ProjectSecrets API

OPEN COLLECTION

Semaphore Public Dashboards Secrets API

OPEN COLLECTION

Semaphore Public Dashboards SelfHostedAgents API

OPEN COLLECTION

Semaphore Public Dashboards SelfHostedAgentTypes API

OPEN COLLECTION

Semaphore Public Dashboards Tasks API

OPEN COLLECTION

Semaphore Public Dashboards Workflows API

OPEN COLLECTION

Scroll for all 11

Semaphore API pricing

Not yet checked against Semaphore's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free	Free
Startup	$9.0
Scaleup	$20.0
Enterprise	—

Plan details, limits and sources →

Rate limits

Pipeline Queue Limit: 30
Default Concurrent Jobs: 20
API Pagination Default: 30

Compiled by API Evangelist, not yet checked against Semaphore's documentation. All 6 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Semaphore Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Semaphore Rate Limits

6 limits

RATE LIMITS

Compliance 1

Attestations the provider states (SOC 2, ISO 27001 and others), quoted from its own trust page. APIs.io verifies none of them.

Semaphore

3 quoted statements, read from Semaphore's own page on 2026-11-10.

COMPLIANCE

FinOps 1

Cost, billing, and metering signals for API financial operations.

Semaphore Finops

FINOPS

Semantic Vocabularies 1

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

Semaphore Context

18 classes · 18 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Semaphore API Rules

72 rules · 64 error-severity 6 warn-severity 2 info-severity

SPECTRAL

Security Posture 4

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

Semaphore Authentication

http · 1 scheme

SECURITY

Semaphore Domain Security

TLSv1.3 · DMARC

SECURITY

Semaphore Vulnerability Disclosure

no policy recorded

SECURITY

Semaphore Trust Center

SOC 2, ISO 27001, PCI DSS

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Semaphore Agentic Access

59 operations · 35 acting · 3 human-in-the-loop

59 operations · 35 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Attestations

Attestations

Source (apis.yml)

aid: semaphore
name: Semaphore
description: Semaphore is a cloud-based CI/CD platform designed for high-performance engineering teams, providing fast and
  reliable continuous integration and continuous delivery pipelines. The platform offers a comprehensive REST API that enables
  programmatic management of pipelines, workflows, jobs, secrets, projects, and deployment targets for software delivery automation.
  Semaphore supports OAS 3.0-compliant API definitions with Swagger documentation, covering resources such as artifacts, test
  results, self-hosted agents, and build insights. Teams can use the API to integrate with external tools, build custom interfaces,
  trigger promotions, and automate their entire software delivery lifecycle.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/semaphore.png
url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.23'
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- CI/CD
- Continuous Integration
- Continuous Delivery
- Pipelines
- Workflows
- DevOps
- Build Automation
- Software Delivery
- Deployment
- Artifacts
- Developer Tools
apis:
- aid: semaphore:semaphore-dashboards-api
  name: Semaphore Dashboards API
  description: Dashboard management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Dashboards
  properties:
  - type: OpenAPI
    url: openapi/semaphore-dashboards-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-deploymenttargets-api
  name: Semaphore DeploymentTargets API
  description: Deployment target management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - DeploymentTargets
  properties:
  - type: OpenAPI
    url: openapi/semaphore-deploymenttargets-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-notifications-api
  name: Semaphore Notifications API
  description: Notification management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Notification
  tags_raw:
  - Notifications
  properties:
  - type: OpenAPI
    url: openapi/semaphore-notifications-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-pipelines-api
  name: Semaphore Pipelines API
  description: Pipeline management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Pipelines
  properties:
  - type: OpenAPI
    url: openapi/semaphore-pipelines-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-projects-api
  name: Semaphore Projects API
  description: Project management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/semaphore-projects-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-projectsecrets-api
  name: Semaphore ProjectSecrets API
  description: Project-level secrets
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - ProjectSecrets
  properties:
  - type: OpenAPI
    url: openapi/semaphore-projectsecrets-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-secrets-api
  name: Semaphore Secrets API
  description: Organization-level secrets
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Secrets
  properties:
  - type: OpenAPI
    url: openapi/semaphore-secrets-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-selfhostedagents-api
  name: Semaphore SelfHostedAgents API
  description: Self-hosted agent management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - SelfHostedAgents
  properties:
  - type: OpenAPI
    url: openapi/semaphore-selfhostedagents-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-selfhostedagenttypes-api
  name: Semaphore SelfHostedAgentTypes API
  description: Self-hosted agent type management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - SelfHostedAgentTypes
  properties:
  - type: OpenAPI
    url: openapi/semaphore-selfhostedagenttypes-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-tasks-api
  name: Semaphore Tasks API
  description: Task management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/semaphore-tasks-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
- aid: semaphore:semaphore-workflows-api
  name: Semaphore Workflows API
  description: Workflow management
  humanURL: https://semaphore.io/product/api
  baseURL: https://{organization}.semaphoreci.com/api/v1alpha
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/semaphore-workflows-api-openapi.yml
  - type: Documentation
    url: https://docs.semaphore.io/reference/api
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/vocabulary/semaphore-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/semaphore/refs/heads/main/json-ld/semaphore-context.jsonld
common:
- type: CapabilityMap
  url: capabilities/semaphore-capability-edges.yml
  name: Semaphore Business Capability Map
- type: AgenticAccess
  url: agentic-access/semaphore-agentic-access.yml
- type: TrustCenter
  url: security/semaphore-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/semaphore-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/semaphore-domain-security.yml
- type: Authentication
  url: authentication/semaphore-authentication.yml
- type: Website
  url: https://semaphore.io
- type: Documentation
  url: https://docs.semaphore.io
- type: GitHubOrg
  url: https://github.com/semaphoreci
- type: LinkedIn
  url: https://www.linkedin.com/company/semaphore-software
- type: Blog
  url: https://semaphore.io/blog
- type: Pricing
  url: https://semaphore.io/pricing
- type: StatusPage
  url: https://status.semaphore.io
- type: X
  url: https://twitter.com/semaphoreci
- type: Plans
  url: plans/semaphore-plans-pricing.yml
- type: RateLimits
  url: rate-limits/semaphore-rate-limits.yml
- type: FinOps
  url: finops/semaphore-finops.yml
- type: Attestations
  url: compliance/semaphore-compliance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Semaphore API — frequently asked questions

Does Semaphore have an API?

Yes. APIs.io lists 11 APIs from Semaphore, including Semaphore Dashboards API, Semaphore DeploymentTargets API and Semaphore Notifications API, and 8 more.

Is there an OpenAPI specification for the Semaphore API?

Yes. APIs.io indexes 11 OpenAPI specifications for Semaphore, each linked for download from this page.

How do I authenticate with the Semaphore API?

Semaphore uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Semaphore Authentication.

How much does the Semaphore API cost?

APIs.io lists 4 pricing plans for Semaphore, with each plan's price, limits and inclusions under Pricing on this page.

Is the Semaphore API ready for AI agents?

Semaphore has a Kin Score of 41.4 out of 100 (developing) and an Agent Readiness score of 33.2 (agent-ready), scored by API Evangelist on 2026-11-13.

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