Fanbridge

FanBridge was an email and SMS marketing platform for musicians, artists, bands, and creators, letting them grow and message their fan mailing lists, run newsletters, and capture subscribers from shows and social channels. It was surfaced as a portfolio company of 500 Global and added to the API Evangelist network as a stub. Enrichment (2026-07-19) confirmed FanBridge is defunct - it was acquired by Kit (formerly ConvertKit) and ceased operations on April 11, 2022, with active accounts migrated to the Kit platform. The domain fanbridge.com now 302-redirects to kit.com/fanbridge. There is no standalone FanBridge developer API, documentation, SDK, or event surface; the developer docs linked from the destination site belong to Kit, not FanBridge.

Fanbridge is profiled on the APIs.io network. Tagged areas include Company, Email Marketing, SMS Marketing, Music, and Musicians.

🌐 Visit website 📡 Source on GitHub

5.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Email Marketing SMS Marketing MusicMusiciansFan Engagement Marketing Newsletters Defunct

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 5.0/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/fanbridge: 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 →

Resources

Company 2

The organization behind the API

Website

Website

SuccessorWebsite

SuccessorWebsite

Source (apis.yml)

aid: fanbridge
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: Unknown
  confidence: low
  source:
  - url: https://fanbridge.com
    status: 302
    note: declared website redirects to https://kit.com/fanbridge — a different registrable domain (fanbridge.com -> kit.com),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fanbridge.png
name: Fanbridge
description: FanBridge was an email and SMS marketing platform for musicians, artists, bands, and creators, letting them grow
  and message their fan mailing lists, run newsletters, and capture subscribers from shows and social channels. It was surfaced
  as a portfolio company of 500 Global and added to the API Evangelist network as a stub. Enrichment (2026-07-19) confirmed
  FanBridge is defunct - it was acquired by Kit (formerly ConvertKit) and ceased operations on April 11, 2022, with active
  accounts migrated to the Kit platform. The domain fanbridge.com now 302-redirects to kit.com/fanbridge. There is no standalone
  FanBridge developer API, documentation, SDK, or event surface; the developer docs linked from the destination site belong
  to Kit, not FanBridge.
url: https://raw.githubusercontent.com/api-evangelist/fanbridge/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-status-detail: Acquired by Kit (formerly ConvertKit); ceased operations 2022-04-11; accounts migrated to Kit; fanbridge.com
  redirects to kit.com/fanbridge.
x-acquired-by: kit
x-shutdown-date: '2022-04-11'
x-redirects-to: https://kit.com/fanbridge
x-enrichment-note: No API/OpenAPI/docs/SDK/MCP/event surface exists - provider is defunct. Enrichment verified via live redirect
  probe (fanbridge.com -> 302 -> kit.com/fanbridge) and page fetch on 2026-07-19.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Email Marketing
- SMS Marketing
- Music
- Musicians
- Fan Engagement
- Marketing
- Newsletters
- Defunct
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://fanbridge.com
- type: SuccessorWebsite
  name: Kit (formerly ConvertKit) - FanBridge successor
  url: https://kit.com/fanbridge
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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