Free
Providers using this tag (27)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 1 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Developing 3 Usable, with meaningful gaps to close
Thin 15 Limited public surface area
Emerging 4 Early or largely undocumented
APIs with this tag (10)
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 →
Exemplar 2 Complete, well-documented, and agent-ready
Strong 3 Solid coverage with minor gaps
Developing 1 Usable, with meaningful gaps to close
Thin 4 Limited public surface area
Score breakdown
Related tags
Where this tag comes from
Cohort brief
Auto-generatedThe 27 providers in the APIs.io catalog tagged Free, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 49.7 | 17.5 | +32.2 | 27 |
| Discoverability | 74.8 | 60.4 | +14.4 | 27 |
| Access Clarity | 34.9 | 22.3 | +12.6 | 27 |
| Operational Transparency | 23.3 | 11.3 | +12 | 27 |
| Developer Ergonomics | 25.5 | 17.9 | +7.6 | 27 |
| Contract Governance | 13.7 | 6.4 | +7.3 | 27 |
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) | 19% | 16% | +3 |
| MCP server (first-party) | 19% | 7% | +12 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 11% | 9% | +2 |
| Security | 100% | 88% | +12 |
| Arazzo workflows | 4% | 2% | +2 |
| Governance rules | 56% | 13% | +43 |
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 DeBounce 71.8
- 2 Avalara 63.6
- 3 Clearbit (HubSpot Breeze Intelligence) 60.6
- 4 Scryfall 57.2
- 5 Alpha Vantage 57.1
- 6 Codag 49.9
- 7 Open-Meteo 40.4
- 8 Free Currency API 40.2
- 9 Bored API 38.6
- 10 Sunrise Sunset 36.1
- 1 DeBounce 69
- 2 Alpha Vantage 55.9
- 3 Avalara 46.9
- 4 IBANforge 39.9
- 5 Bored API 32.5
- 6 Free Currency API 31.7
- 7 Codag 29
- 8 Cat Facts API 25.8
- 9 Corporate Bullshit Generator API 25.8
- 10 ISS Location API (Open Notify) 25.8
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.