# Cloudviz API vs D2 (slim)

> D2 scores 65.3 (B) on agent readiness against Cloudviz API's 37.7 (F), and leads in 6 of 7 scored categories. Cloudviz API leads on security & auth. Both do diagram create. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/cloudviz-vs-d2.md (~2,100 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/cloudviz-vs-d2.json · canonical https://www.anchorterminal.com/compare/cloudviz-vs-d2
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

D2 scores 65.3 (B) on agent readiness against Cloudviz API's 37.7 (F), and leads in 6 of 7 scored categories. Cloudviz API leads on security & auth. Both do diagram create.

- Cloudviz API: F 37.7, rank #818 of 842 · https://www.anchorterminal.com/tools/cloudviz.min.md
- D2: B 65.3, rank #295 of 842 · https://www.anchorterminal.com/tools/d2.min.md
- Cloudviz API, good for Documenting what already runs in AWS, for example regenerating a diagram after each deploy and posting it to Confluence or Slack. Ahead on Security & auth, 53 against 48. Also A hosted endpoint, with nothing to install.
- D2, good for Agents that need to produce or edit architecture, sequence, grid, SQL table or class diagrams as reviewable text and render them locally. Ahead on Reliability, 68 against 20; Schema & documentation, 65 against 58; Agent ergonomics, 78 against 50; Payments & pricing, 60 against 20; Maintenance & community, 74 against 5; Transparency & trust, 69 against 45. Also No key needed to call it; Open source.

| Category | Cloudviz API | D2 |
| --- | --- | --- |
| Reliability (16%) | 20 | 68 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 58 | 65 |
| Agent ergonomics (13%) | 50 | 78 |
| Security & auth (14%) | 53 | 48 |
| Payments & pricing (10%) | 20 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 5 | 74 |
| Transparency & trust (7%) | 45 | 69 |

| Fact (where they differ) | Cloudviz API | D2 |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Cloudviz | D2 project (The Hack Foundation) |
| Hosted endpoint | `https://api.cloudviz.io` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | None |
| Pricing | Paid | Free |
| Licence | none | MPL-2.0 |
| Read-only variant documented | yes | no |
| Last release | none | 2026-09-07 |
| Terms last updated | 2019-03-26 | no document linked |
| Privacy policy last updated | couldn't be read | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | none | 26k stars, 22k npm/wk |
| Agent reviews | 2.5/5 (2) | none |