Buzzer
Buzzer was a mobile live-sports streaming startup founded in 2020 by Bo Han, formerly director of live content at Twitter. Its consumer app, launched in 2021, sold micropayment access — as low as $0.99 to $1 — to short in-game moments of live sporting events, targeting Gen Z fans who would not buy a full cable or league subscription. Buzzer secured streaming rights covering the NBA, WNBA, NHL, PGA Tour and ATP Tour, and raised roughly $44 million in total, including a $20 million Series A in June 2021 co-led by Sapphire Sport and Canaan Partners alongside a large group of athlete and team-owner investors. On 19 May 2023 the company shut down the direct-to-consumer app and pivoted to a business-to-business model branded "Powered by Buzzer", announced as API licensing, custom development and consulting for leagues, teams and networks streaming direct to fans. That offering never reached public availability: Buzzer ceased all operations on 30 June 2023, citing "recent fundraising developments and market dynamics". No public developer portal, API documentation, specification, SDK or package was ever published. The buzzer.com domain no longer hosts the company and now redirects to an Atom.com domain-for-sale listing. Retained in the network as a historical record of a defunct company; not an active API provider.
Buzzer is profiled on the APIs.io network. Tagged areas include Company, Defunct, Sports, Streaming, and Media.
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
Kin Score
Kin Score
How this is scored →scored 2026-11-06 · rubric v0.27.0
<a href="https://apis.io/providers/buzzer/"><img src="https://apis.io/badge/buzzer/card.svg" alt="Buzzer on APIs.io — Kin Score by API Evangelist"></a>Other styles, a README pill and a shields.io endpoint are on the badge page.
- Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
- MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
- Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
- Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
- Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
- Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
- Contract Quality scores 0.0 — up to +25.0 composite points
- Developer Ergonomics scores 0.0 — up to +20.0 composite points
- Access Clarity scores 0.0 — up to +20.0 composite points
Source (apis.yml)
aid: buzzer
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: []
generated: '2026-11-06'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/buzzer.png
name: Buzzer
description: 'Buzzer was a mobile live-sports streaming startup founded in 2020 by Bo Han, formerly director of live content
at Twitter. Its consumer app, launched in 2021, sold micropayment access — as low as $0.99 to $1 — to short in-game moments
of live sporting events, targeting Gen Z fans who would not buy a full cable or league subscription. Buzzer secured streaming
rights covering the NBA, WNBA, NHL, PGA Tour and ATP Tour, and raised roughly $44 million in total, including a $20 million
Series A in June 2021 co-led by Sapphire Sport and Canaan Partners alongside a large group of athlete and team-owner investors.
On 19 May 2023 the company shut down the direct-to-consumer app and pivoted to a business-to-business model branded "Powered
by Buzzer", announced as API licensing, custom development and consulting for leagues, teams and networks streaming direct
to fans. That offering never reached public availability: Buzzer ceased all operations on 30 June 2023, citing "recent fundraising
developments and market dynamics". No public developer portal, API documentation, specification, SDK or package was ever
published. The buzzer.com domain no longer hosts the company and now redirects to an Atom.com domain-for-sale listing. Retained
in the network as a historical record of a defunct company; not an active API provider.'
url: https://raw.githubusercontent.com/api-evangelist/buzzer/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: defunct-no-api-surface
x-status: defunct
x-status-detail: Ceased all operations 30 June 2023; buzzer.com now parked for sale at Atom.com.
x-defunct-date: '2023-06-30'
x-founded: '2020'
x-references:
- title: Buzzer Secures $20 Million In Series A Financing Led By Sapphire Sport, Canaan Partners
url: https://www.prnewswire.com/news-releases/buzzer-secures-20-million-in-series-a-financing-led-by-sapphire-sport-canaan-partners-and-a-dynamic-collective-of-superstar-athletes-and-team-owners-301323154.html
- title: Buzzer to shutdown app and shift to becoming sports tech provider
url: https://www.sportspro.com/news/buzzer-app-shut-down-sports-tech-provider-licensing-mobile-streaming-bo-han/
- title: Buzzer, the Gen Z Sports App Backed by $44 Million, Shuts Down
url: https://frontofficesports.com/buzzer-the-gen-z-sports-app-backed-by-44-million-shuts-down/
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Defunct
- Sports
- Streaming
- Media
- Live Streaming
- Consumer App
- Sports Technology
tags_raw:
- Company
- Defunct
- Sports
- Streaming
- Media
- Live Video
- Consumer Apps
- Sports Technology
apis: []
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
x-enrichment:
date: '2026-07-20'
status: nochange
artifacts_added: 0
pass: local-v1
notes: Company defunct since 2023-06-30; no API surface was ever published. Probed buzzer.com (302 to atom.com domain sale),
api./developer./docs. subdomains (no DNS), /.well-known/security.txt (404), /llms.txt (404), npm and PyPI (only unrelated
third-party packages by other authors), and the Wayback Machine (no archived developer docs). No artifacts fabricated.
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