# aria2

**Canonical:** https://apis.io/providers/aria2/  
**Website:** https://translations.launchpad.net/aria2/trunk/+pots/aria2  
**APIs profiled:** 2

aria2 is a lightweight, multi-protocol command-line download utility supporting HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink. It offers JSON-RPC and XML-RPC interfaces for remote control, and is open‑source under GPL‑2.0. The tool is highly efficient, using minimal memory and CPU, and can split downloads across multiple sources to maximize bandwidth. It runs on Windows, macOS, Linux, Android and integrates with various package managers.

## Kin Score — 22.7 / 100 (emerging)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 57.1 |
| Contract Quality | 17.6 |
| Contract Governance | 22.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 21.4 |
| Access Clarity | 31.6 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 10.8 (matched via fallback).

## Agent readiness — 17.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |

## APIs (2)

- **aria2** — aria2 is a lightweight, multi-protocol command-line download utility supporting HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.
- **aria2 API** — aria2 API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist (2026-10-28); not the provider's own document.

## Security (1)

- **Aria2 Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Aria2 Plans Pricing**

## Tags

Company, Download, OpenSource, CommandLine, MultiProtocol

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/aria2/). Scores are computed from the provider's own public artifacts under a published rubric.