Bullpen Capital
Bullpen Capital is a San Francisco-based venture capital firm founded in 2010 by Paul Martino, Duncan Davidson, and Richard Melmon that pioneered the "post-seed" investment category. The firm provides early-stage financing to companies that have found initial product-market fit but are overlooked by traditional investors "for no good reason" — deliberately backing unconventional founders and sectors that other firms dismiss. Bullpen typically writes checks in the range of roughly $1M-$5M, often stepping in between the seed and Series A rounds to help capital-efficient companies push toward a strong institutional raise. The firm invests across gaming, commerce, apps and services, health, consumer and lifestyle, fintech, and marketplaces, primarily in North America with select exposure in Latin America (notably Brazil and Mexico). With a portfolio of 90+ companies, Bullpen's notable investments include FanDuel, Namely, Classy, Braze, HomeLight, ipsy, SpotHero, Splitwise, and Wag.
Bullpen Capital has 92 portfolio companies tracked on the APIs.io network, of which 26 (28%) publish APIs indexed here. The remaining 66 are tracked as profiles without a published API on the network.
Its highest-rated API providers on the network are Braze, Improvado, Ocrolus, Fama, PackageX.
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 1 Complete, well-documented, and agent-ready
Strong 1 Solid coverage with minor gaps
Developing 7 Usable, with meaningful gaps to close
Thin 12 Limited public surface area
Emerging 5 Early or largely undocumented
Properties
Portfolio
Where the firm publishes its investments
Firm
The firm itself
Cohort brief
Auto-generatedThe 83 portfolio companies with APIs in the catalog, backed by Bullpen Capital, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Governance | 3.4 | 6.3 | -2.9 | 83 |
| Operational Transparency | 8.9 | 13.6 | -4.7 | 83 |
| Access Clarity | 21.6 | 26.4 | -4.8 | 83 |
| Discoverability | 53.2 | 58.2 | -5 | 83 |
| Contract Quality | 12.1 | 17.6 | -5.5 | 83 |
| Developer Ergonomics | 17 | 23.1 | -6.1 | 83 |
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) | 11% | 15% | -4 |
| MCP server (first-party) | 11% | 12% | -1 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 6% | 11% | -5 |
| Security | 100% | 98% | +2 |
| Arazzo workflows | 2% | 2% | 0 |
| Governance rules | 2% | 13% | -11 |
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 Braze 75.1
- 2 Improvado 65.4
- 3 Ocrolus 53.9
- 4 Windfall Data 49.4
- 5 PackageX 47.5
- 6 Beyond Pricing 46.5
- 7 Fama 45.2
- 8 Grin 45
- 9 Octane AI 43.8
- 10 LiveIntent 42.1
- 1 Braze 55.9
- 2 Improvado 53.2
- 3 Ocrolus 38.7
- 4 Beyond Pricing 38.3
- 5 SpotHero 35.9
- 6 Pinata 31.6
- 7 Windfall Data 31.5
- 8 Tank Utility 31.5
- 9 Swish Analytics 31.5
- 10 LiveIntent 30.8
Coverage caveat. 79 of 83 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 3 October 2026, across 28834 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.