Bucket

Bucket (rebranded to Reflag in 2026, reflag.com) is a TypeScript-first feature management platform built for B2B SaaS teams. It provides feature flags with self-cleaning lifecycle automation, AI/agent integration via a hosted MCP server, strongly typed SDKs for React, React Native, Vue, Next.js, Node.js and the browser, OpenFeature providers, local flag evaluation for zero-latency and downtime protection, feature entitlements, in-app feedback collection, and deep integrations with Linear, Slack, GitHub, Datadog, Vercel and analytics tools. The platform exposes two APIs — a Runtime API for evaluating flags for users and companies at request time, and a Management API for programmatically managing apps, environments, flags and targeting rules from CI/CD. Backed by 500 Global and Creandum.

Bucket publishes 1 API on the APIs.io network: Apps API. Tagged areas include Company, Feature Flags, Feature Management, Feature Flagging, and Developer Tools.

Bucket’s developer surface includes documentation, API reference, getting-started guide, engineering blog, changelog, pricing, signup flow, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

53.2/100 developing ▬ flat Agent 45/100 agent ready saas Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0

1 APIs

Company Feature Flags Feature ManagementFeature FlaggingDeveloper Tools Software-as-a-Service Entitlements Experimentation MCP Agent Ready

Kin Score

Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0

Composite quality — 53.2/100 · developing

Contract Quality 14.1 / 25

Developer Ergonomics 13.7 / 20

Access Clarity 10.8 / 20

Operational Transparency 4.8 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 45/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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 github.com/api-evangelist/bucket: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

WellKnown

AgenticAccess

AgentSkill

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

Lifecycle

Components

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 6

Authentication, authorization, and security posture

TrustCenter

Security

Compliance

Authentication

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: bucket
name: Bucket
description: Bucket (rebranded to Reflag in 2026, reflag.com) is a TypeScript-first feature management platform built for
  B2B SaaS teams. It provides feature flags with self-cleaning lifecycle automation, AI/agent integration via a hosted MCP
  server, strongly typed SDKs for React, React Native, Vue, Next.js, Node.js and the browser, OpenFeature providers, local
  flag evaluation for zero-latency and downtime protection, feature entitlements, in-app feedback collection, and deep integrations
  with Linear, Slack, GitHub, Datadog, Vercel and analytics tools. The platform exposes two APIs — a Runtime API for evaluating
  flags for users and companies at request time, and a Management API for programmatically managing apps, environments, flags
  and targeting rules from CI/CD. Backed by 500 Global and Creandum.
url: https://raw.githubusercontent.com/api-evangelist/bucket/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- creandum
x-tier: stub
x-tier-reason: portfolio-lead
x-rebrand: Bucket (bucket.co) rebranded to Reflag (reflag.com) in 2026; likebucket.com no longer resolves.
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
image: https://cdn.prod.website-files.com/68a872edf3df6064de547670/68b8414134c540f12c2928bc_reflag-dynamic-favicon.svg
tags:
- Company
- Feature Flags
- Feature Management
- Feature Flagging
- Developer Tools
- Software-as-a-Service
- Entitlements
- Experimentation
- MCP
- Agent Ready
tags_raw:
- Company
- Feature Flags
- Feature Management
- Feature Flagging
- Developer Tools
- SaaS
- Entitlements
- Experimentation
- MCP
- Agent Ready
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Reflag Runtime API
  description: JSON-over-HTTP API browsers and backends use at runtime to fetch evaluated and enabled flags, and to send users,
    companies and feature-usage events. Publishable-key (client) or secret-key (server) bearer auth; EU point of presence
    at front-eu.reflag.com.
  humanURL: https://docs.reflag.com/api/public-api
  baseURL: https://front.reflag.com
- aid: bucket:bucket-apps-api
  name: Bucket Apps API
  description: The Apps API from Bucket — 9 operation(s) for apps.
  humanURL: https://docs.reflag.com/api/reflag-rest-api
  baseURL: https://app.reflag.com/api
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/bucket-apps-api-openapi.yml
  - type: ErrorCatalog
    url: errors/bucket-error-codes.yml
  - type: DataModel
    url: data-model/bucket-data-model.yml
common:
- type: Overlay
  url: overlays/bucket-management-overlay.yaml
- type: TrustCenter
  url: security/bucket-trust-center.yml
- type: Website
  url: https://reflag.com
- type: DeveloperPortal
  url: https://docs.reflag.com
- type: Documentation
  url: https://docs.reflag.com
- type: APIReference
  url: https://docs.reflag.com/api/reflag-rest-api/reflag-api-reference
- type: GettingStarted
  url: https://docs.reflag.com/welcome/readme
- type: Blog
  url: https://reflag.com/blog
- type: ChangeLog
  url: https://reflag.com/changelog
- type: Pricing
  url: https://reflag.com/pricing
- type: SignUp
  url: https://app.reflag.com/signup
- type: Login
  url: https://app.reflag.com/login
- type: TermsOfService
  url: https://reflag.com/legal/terms
- type: PrivacyPolicy
  url: https://reflag.com/legal/privacy-policy
- type: GitHubOrganization
  url: https://github.com/reflagcom
- type: StatusPage
  url: https://status.reflag.com
- type: Security
  url: https://reflag.com/legal/security-policy
- type: Compliance
  url: https://reflag.com/security
- type: Packages
  url: packages/bucket-packages.yml
- type: SDKs
  url: packages/bucket-packages.yml
- type: CLI
  url: cli/bucket-cli.yml
- type: X-MCPServerCandidate
  url: mcp/bucket-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/bucket-llms.txt
- type: WellKnown
  url: well-known/bucket-well-known.yml
- type: Authentication
  url: authentication/bucket-authentication.yml
- type: Conventions
  url: conventions/bucket-conventions.yml
- type: Conformance
  url: conformance/bucket-conformance.yml
- type: Lifecycle
  url: lifecycle/bucket-lifecycle.yml
- type: Components
  url: components/bucket-components.yml
- type: DomainSecurity
  url: security/bucket-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/bucket-vulnerability-disclosure.yml
- type: AgenticAccess
  url: agentic-access/bucket-agentic-access.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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Bucket

Kin Score

APIs 2

Reflag Runtime API

Bucket Apps API

Open Collections 2

API Collection

Reflag Management Apps API

Security Posture 4

Bucket Authentication

Bucket Domain Security

Bucket Vulnerability Disclosure

Bucket Trust Center

Agentic Access 1

Bucket Agentic Access

Resources