# CHAOSS Evolution API

**Canonical:** https://apis.io/apis/chaoss/chaoss-evolution-api/  
**Provider:** CHAOSS — https://apis.io/providers/chaoss/  
**Base URL:** https://collectoss.example.com/api/unstable  
**Documentation:** https://docs.collectoss.org/en/latest/

CHAOSS Evolution API is one of 12 APIs that [CHAOSS](https://apis.io/providers/chaoss/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Evolution. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, a GitHub repository, and authentication docs.

The evolution API from CHAOSS — 52 operation(s) for evolution.

## Operations (52)

| Method | Path | Summary |
|---|---|---|
| GET | `/repo-groups/:repo_group_id/code-changes` | Code changes (repo group) |
| GET | `/repos/:repo_id/code-changes` | Code changes (repo) |
| GET | `/repo-groups/:repo_group_id/code-changes-lines` | Code changes lines (repo group) |
| GET | `/repos/:repo_id/code-changes-lines` | Code changes lines (repo) |
| GET | `/repo-groups/:repo_group_id/contributors` | Contributors (repo group) |
| GET | `/repos/:repo_id/contributors` | Contributors (repo) |
| GET | `/repo-groups/:repo_group_id/contributors-new` | New contributors (repo group) |
| GET | `/repos/:repo_id/contributors-new` | New contributors (repo) |
| GET | `/repo-groups/:repo_group_id/issue-backlog` | Issue backlog (repo group) |
| GET | `/repos/:repo_id/issue-backlog` | Issue backlog (repo) |
| GET | `/repo-groups/:repo_group_id/issue-participants` | Issue participants (repo group) |
| GET | `/repos/:repo_id/issue-participants` | Issue participants (repo) |
| GET | `/repo-groups/:repo_group_id/issue-throughput` | Issue throughput (repo group) |
| GET | `/repos/:repo_id/issue-throughput` | Issue throughput (repo) |
| GET | `/repo-groups/:repo_group_id/issues-active` | Issues active (repo group) |
| GET | `/repos/:repo_id/issues-active` | Issues active (repo) |
| GET | `/repo-groups/:repo_group_id/issues-closed` | Issues closed (repo group) |
| GET | `/repos/:repo_id/issues-closed` | Issues closed (repo) |
| GET | `/repo-groups/:repo_group_id/issues-closed-resolution-duration` | Closed issue resolution duration (repo group) |
| GET | `/repos/:repo_id/issues-closed-resolution-duration` | Closed issue resolution duration (repo) |
| GET | `/repo-groups/:repo_group_id/issues-first-time-closed` | Closed issues new contributor (repo group) |
| GET | `/repos/:repo_id/issues-first-time-closed` | Closed issues new contributors (repo) |
| GET | `/repo-groups/:repo_group_id/issues-first-time-opened` | New contributors of issues (repo group) |
| GET | `/repos/:repo_id/issues-first-time-opened` | New contributors of issues (repo) |
| GET | `/repo-groups/:repo_group_id/issues-maintainer-response-duration` | Issue response time (repo group) |
| GET | `/repos/:repo_id/issues-maintainer-response-duration` | Issue response time (repo) |
| GET | `/repo-groups/:repo_group_id/issues-new` | Issues new (repo group) |
| GET | `/repos/:repo_id/issues-new` | Issues new (repo) |
| GET | `/repo-groups/:repo_group_id/issues-open-age` | Open issue age (repo group) |
| GET | `/repos/:repo_id/issues-open-age` | Open issue age (repo) |
| GET | `/repo-groups/:repo_group_id/pull-requests-merge-contributor-new` | New contributors of commits (repo group) |
| GET | `/repos/:repo_id/pull-requests-merge-contributor-new` | New contributors of commits (repo) |
| GET | `/repo-groups/:repo_group_id/review-duration` | Review duration (repo group) |
| GET | `/repos/:repo_id/review-duration` | Review duration (repo) |
| GET | `/repo-groups/:repo_group_id/reviews` | Reviews (repo group) |
| GET | `/repos/:repo_id/reviews` | Reviews (repo) |
| GET | `/repo-groups/:repo_group_id/reviews-accepted` | Reviews accepted (repo group) |
| GET | `/repos/:repo_id/reviews-accepted` | Reviews accepted (repo) |
| GET | `/repo-groups/:repo_group_id/reviews-declined` | Reviews declined (repo group) |
| GET | `/repos/:repo_id/reviews-declined` | Reviews declined (repo) |
| GET | `/repo-groups/:repo_group_id/sub-projects` | Sub projects (repo group) |
| GET | `/repos/:repo_id/sub-projects` | Sub projects (repo) |
| GET | `/repo-groups/:repo_group_id/closed-issues-count` | Closed issues count (repo group) |
| GET | `/repos/:repo_id/closed-issues-count` | Closed issues count (repo) |
| GET | `/repo-groups/:repo_group_id/issue-duration` | Issue duration (repo group) |
| GET | `/repo-groups/:repo_id/issue-duration` | Issue duration (repo) |
| GET | `/repos/:repo_group_id/releases` | Number of releases (repo) |
| GET | `/repos/:repo_id/releases` | Number of releases (repo) |
| GET | `/repo-groups/:repo_group_id/open-issues-count` | Open issues count (repo group) |
| GET | `/repo-groups/:repo_id/open-issues-count` | Open issues count (repo group) |
| GET | `/repo-groups/:repo_group_id/repo-messages` | Repository messages (repo group) |
| GET | `/repos/:repo_id/repo-messages` | Repo messages (repo) |

## Machine-readable artifacts (8)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/chaoss/refs/heads/main/openapi/chaoss-evolution-api-openapi.yml
- **Documentation** — https://docs.collectoss.org/en/latest/
- **APIReference** — https://docs.collectoss.org/en/latest/rest-api/api.html
- **GitHubRepository** — https://github.com/chaoss/CollectOSS
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/chaoss/refs/heads/main/authentication/chaoss-authentication.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/chaoss/refs/heads/main/errors/chaoss-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/chaoss/refs/heads/main/data-model/chaoss-data-model.yml
- **X-MCPServerCandidate** — https://raw.githubusercontent.com/api-evangelist/chaoss/refs/heads/main/mcp/chaoss-mcp.yml

## Other CHAOSS APIs (11)

- [CHAOSS Metrics Catalog](https://apis.io/apis/chaoss/metrics-catalog/)
- [CHAOSS GrimoireLab](https://apis.io/apis/chaoss/grimoirelab/)
- [CHAOSS 8Knot Dashboard](https://apis.io/apis/chaoss/8knot/)
- [CHAOSS Complexity API](https://apis.io/apis/chaoss/chaoss-complexity-api/)
- [CHAOSS DEI Badging API](https://apis.io/apis/chaoss/chaoss-dei-badging-api/)
- [CHAOSS Experimental API](https://apis.io/apis/chaoss/chaoss-experimental-api/)
- [CHAOSS Login API](https://apis.io/apis/chaoss/chaoss-login-api/)
- [CHAOSS Risk API](https://apis.io/apis/chaoss/chaoss-risk-api/)
- [CHAOSS Utility API](https://apis.io/apis/chaoss/chaoss-utility-api/)
- [CHAOSS Value API](https://apis.io/apis/chaoss/chaoss-value-api/)
- [CHAOSS Visualizations API](https://apis.io/apis/chaoss/chaoss-visualizations-api/)

## Tags

Evolution

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/chaoss/chaoss-evolution-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/chaoss/.