Fusebit

aid: fusebit
name: Fusebit
description: 'Fusebit was a code-first, developer-facing embedded integration platform (embedded iPaaS) founded in Seattle
  in 2019, letting SaaS teams build, deploy and run third-party integrations inside their own products using serverless functions,
  managed OAuth connectors and an embeddable browser IDE. The company was acquired and the platform is retired: as of 2026-09-10
  the domain fusebit.io is still registered but publishes no DNS A record, so the API, the developer documentation, the management
  portal and the asset CDN all fail to resolve. What survives is substantial and first-party — two published OpenAPI 3.0 contracts
  covering 89 operations, four dated release-note streams served from Fusebit''s own GitHub Pages, 101 npm packages under
  the @fusebit and @fusebit-int scopes, and 35 public repositories across the fusebit and fivequarters GitHub organizations.
  This profile is a historical record of a retired API, not a callable surface.'
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Pricing not published — provider retired
  confidence: low
  source:
  - none
  generated: '2026-09-10'
  method: probed
  note: Previously recorded as `freemium` on the basis of an API Evangelist plans scaffold that asserted Free/Professional/Enterprise
    tiers Fusebit never published. That scaffold was removed on 2026-09-10; https://fusebit.io/pricing returns NXDOMAIN and
    no rate card survives anywhere.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fusebit.png
access: 3rd-Party
position: Producing
x-status: defunct
x-status-detail: 'Platform retired after acquisition. fusebit.io is still registered (NameCheap, expiry 2027-04-10) but its
  zone publishes no A record, so the apex, www, developer.fusebit.io, api.us-west-1.on.fusebit.io, manage.fusebit.io, cdn.fusebit.io,
  blog.fusebit.io and everyauth.fusebit.io all return NXDOMAIN (probed 2026-09-10). No Website pointer is registered, on purpose:
  the dead one was removed rather than left standing as a claim. The surviving first-party surface is GitHub (github.com/fusebit,
  github.com/fivequarters), npm and the release notes at fivequarters.github.io/q5/release-notes/, all of which are registered
  above.'
tags:
- Developer Tools
- Embedded iPaaS
- Integration
- Serverless
- Authentication
- Acquired
tags_raw:
- Developer Tools
- Embedded iPaaS
- Integration
- Serverless
- OAuth
- Acquired
url: https://raw.githubusercontent.com/api-evangelist/fusebit/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-09-15'
specificationVersion: '0.23'
apis:
- aid: fusebit:apis
  name: Fusebit HTTP API
  description: The Fusebit HTTP API managed and executed everything on the platform across two concurrent major versions on
    one host. v1 (Core, 49 operations) covered accounts, subscriptions, boundaries, serverless functions, users, machine clients,
    trusted JWT issuers, subscription storage and a private npm registry. v2 (Integrations, 40 operations) covered integrations,
    third-party credential connectors, per-customer installs and identities, configuration sessions and entity tags. Authentication
    was a bearer JWT minted against an issuer registered on the account, with authorization expressed as explicit {action,
    resource} grants rather than OAuth scopes. The API is retired — api.us-west-1.on.fusebit.io no longer resolves in DNS.
  humanURL: https://github.com/fusebit
  baseURL: https://api.us-west-1.on.fusebit.io
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fusebit.png
  tags:
  - Developer Tools
  - Embedded iPaaS
  - Integration
  - Serverless
  properties:
  - type: OpenAPI
    url: openapi/fusebit-http-api-core-openapi.yml
  - type: OpenAPI
    url: openapi/fusebit-http-api-integrations-openapi.yml
  - type: Overlay
    url: overlays/fusebit-core-overlay.yaml
  - type: Overlay
    url: overlays/fusebit-integrations-overlay.yaml
  - type: Authentication
    url: authentication/fusebit-authentication.yml
  - type: Conventions
    url: conventions/fusebit-conventions.yml
  - type: ErrorCatalog
    url: errors/fusebit-problem-types.yml
  - type: DataModel
    url: data-model/fusebit-data-model.yml
  - type: RateLimits
    url: rate-limits/fusebit-rate-limits.yml
  - type: SourceCode
    url: https://github.com/fivequarters/q5/tree/HEAD/api/function-api
common:
- type: GitHubOrganization
  url: https://github.com/fusebit
- type: LinkedIn
  url: https://www.linkedin.com/company/fusebit
- type: ChangeLog
  url: https://fivequarters.github.io/q5/release-notes/
- type: ChangeLog
  url: changelog/fusebit-changelog.yml
- type: SourceCode
  url: https://github.com/fivequarters/q5
- type: Authentication
  url: authentication/fusebit-authentication.yml
- type: Conventions
  url: conventions/fusebit-conventions.yml
- type: ErrorCatalog
  url: errors/fusebit-problem-types.yml
- type: DataModel
  url: data-model/fusebit-data-model.yml
- type: Lifecycle
  url: lifecycle/fusebit-lifecycle.yml
- type: Conformance
  url: conformance/fusebit-conformance.yml
- type: Packages
  url: packages/fusebit-packages.yml
- type: SDKs
  url: packages/fusebit-packages.yml
- type: CLI
  url: cli/fusebit-cli.yml
- type: Components
  url: components/fusebit-components.yml
- type: LLMsTxt
  url: llms/fusebit-llms.txt
- type: RateLimits
  url: rate-limits/fusebit-rate-limits.yml
- type: Plans
  url: plans/fusebit-plans-pricing.yml
- type: DomainSecurity
  url: security/fusebit-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-09-10'
  status: enriched
  artifacts_added: 19
  pass: local-v3