Uncork Capital
Uncork Capital is a San Francisco-based seed-stage venture capital firm founded in 2004 by Jeff Clavier, who formalized his angel portfolio into one of Silicon Valley's earliest dedicated seed funds; it operated as SoftTech VC until rebranding to Uncork Capital in 2017. Led by managing partners Jeff Clavier and Andy McLoughlin, the firm invests at the seed stage with a "first to believe" conviction style, typically targeting 10-15% ownership and writing seed checks broadly in the $1.5M-$4M range across B2B applications and SaaS, developer tooling, infrastructure and security, consumer and marketplaces, frontier tech/hardware, and AI/ML. In May 2025 the firm closed $300M in fresh capital across Uncork VIII (a $225M seed fund) and Uncork Plus IV (a $75M growth fund), bringing it to roughly $1.2B in assets under management. Across 275+ investments and 100+ outcomes, its portfolio and exits include SendGrid, Fitbit, Poshmark, Postmates, Eventbrite, LaunchDarkly, Tailscale, Front, Shippo, ClassDojo, Groq, Human Interest, Carrot Fertility, and GPTZero.
Uncork Capital has 174 portfolio companies tracked on the APIs.io network, of which 68 (39%) publish APIs indexed here. The remaining 106 are tracked as profiles without a published API on the network.
Its highest-rated API providers on the network are SendGrid, LaunchDarkly, UserGems, Bitly, Vidyard.
Portfolio on the Network
Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.
Exemplar 7 Complete, well-documented, and agent-ready
Developing 24 Usable, with meaningful gaps to close
Thin 16 Limited public surface area
Emerging 12 Early or largely undocumented
Properties
Portfolio
Where the firm publishes its investments
Firm
The firm itself
Cohort brief
Auto-generatedThe 137 portfolio companies with APIs in the catalog, backed by Uncork Capital, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Access Clarity | 36.1 | 26.5 | +9.6 | 137 |
| Operational Transparency | 16.3 | 13.2 | +3.1 | 137 |
| Developer Ergonomics | 26.7 | 23.8 | +2.9 | 137 |
| Contract Quality | 18.4 | 17.7 | +0.7 | 137 |
| Discoverability | 58.5 | 58 | +0.5 | 137 |
| Contract Governance | 6.7 | 7 | -0.3 | 137 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 23% | 15% | +8 |
| MCP server (first-party) | 23% | 13% | +10 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 15% | 12% | +3 |
| Security | 97% | 98% | -1 |
| Arazzo workflows | 1% | 2% | -1 |
| Governance rules | 11% | 18% | -7 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
- 1 SendGrid
- 2 LaunchDarkly
- 3 UserGems
- 4 Bitly
- 5 Vidyard
- 6 Bem
- 7 LiveRamp
- 8 Crossbeam
- 9 LiquiDonate
- 10 Nuon
- 1 UserGems {"score" => 60.7, "band" => "agent-ready"}
- 2 LaunchDarkly {"score" => 60.6, "band" => "agent-ready"}
- 3 Bitly {"score" => 59.4, "band" => "agent-ready"}
- 4 MonetizeNow {"score" => 54.9, "band" => "agent-native"}
- 5 Chariot {"score" => 53.7, "band" => "agent-ready"}
- 6 Common Paper {"score" => 51.1, "band" => "agent-ready"}
- 7 DocSend {"score" => 47.1, "band" => "agent-ready"}
- 8 Crossbeam {"score" => 46.3, "band" => "agent-ready"}
- 9 Messari {"score" => 43.9, "band" => "agent-ready"}
- 10 Alchemy {"score" => 43.2, "band" => "agent-ready"}
Coverage caveat. 121 of 137 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 2 November 2026, across 37080 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.