Y Combinator
Providers using this tag (250)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 12 Usable, with meaningful gaps to close
Thin 16 Limited public surface area
Emerging 61 Early or largely undocumented
Minimal 157 Almost no public developer surface
Unrated 4 Not yet scored
APIs with this tag (1)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Emerging 1 Early or largely undocumented
Companies reaching this through an API (1)
These companies publish an API, specification or operation carrying “Y Combinator” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Score breakdown
Related tags
Where this tag comes from
Cohort brief
Auto-generatedThe 213 providers in the APIs.io catalog tagged Y Combinator, 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 | 20.1 | 23.9 | -3.8 | 213 |
| Discoverability | 53.3 | 57.9 | -4.6 | 213 |
| Contract Governance | 1.8 | 6.5 | -4.7 | 213 |
| Operational Transparency | 3.9 | 13 | -9.1 | 213 |
| Developer Ergonomics | 12.6 | 23.2 | -10.6 | 213 |
| Contract Quality | 3.5 | 17.2 | -13.7 | 213 |
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) | 20% | 13% | +7 |
| MCP server (first-party) | 20% | 12% | +8 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 6% | 11% | -5 |
| Security | 97% | 98% | -1 |
| Arazzo workflows | 0% | 2% | -2 |
| Governance rules | 0% | 16% | -16 |
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 VOYGR 53.5
- 2 Insforge 53.4
- 3 The Hog 50.6
- 4 Codag 47.1
- 5 Qomplement 44.1
- 6 CharacterQuilt 43.4
- 7 Karumi 43.1
- 8 Amboras 42.7
- 9 ShortKit 42.6
- 10 Caretta 41.9
- 1 The Hog 65.6
- 2 Caretta 60.3
- 3 Karumi 60
- 4 Insforge 56.6
- 5 Litmus Hiring 41.9
- 6 VOYGR 36
- 7 CharacterQuilt 34.1
- 8 Keyframe Labs 33.2
- 9 Cerenovus 32.7
- 10 Tdaycom 32.3
Coverage caveat. 212 of 213 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 24 October 2026, across 31984 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.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.