Latest Package Version Lookup
Query the deps.dev API to get the latest stable version of open-source packages. This is faster and more reliable than searching the web or guessing version numbers, and it catches deprecated packages before you install them.
Supported Ecosystems
| Ecosystem | System ID | Example Package |
|---|---|---|
| npm | npm | express, @types/node |
| PyPI | pypi | requests, django |
| Go | go | github.com/gin-gonic/gin |
| Cargo | cargo | serde, tokio |
| Maven | maven | org.springframework:spring-core |
| NuGet | nuget | Newtonsoft.Json |
When to Use
- Adding a new dependency and need the current version
- Updating
package.json,requirements.txt,Cargo.toml, etc. to latest - Checking whether a package has been deprecated
- Comparing versions across multiple packages at once
When NOT to Use
- Private or internal packages (deps.dev only indexes public registries)
- Looking up documentation or usage examples (use
context7instead)
Workflow
DO NOT read script source code. Run scripts directly and use --help for usage.
- Identify the ecosystem from project files:
- package.json or node_modules → npm - requirements.txt, pyproject.toml, setup.py → pypi - go.mod, go.sum → go - Cargo.toml → cargo - pom.xml, build.gradle → maven - *.csproj, packages.config → nuget
- Run the script:
python3 scripts/get-versions.py <system> <pkg1> [pkg2] ...Run python3 scripts/get-versions.py --help if unsure about usage.
Examples
python3 scripts/get-versions.py npm express lodash @types/node
python3 scripts/get-versions.py pypi requests django flask
python3 scripts/get-versions.py go github.com/gin-gonic/ginOutput Format
TSV with header. One line per package:
package version published status
express 5.0.0 2024-09-10 ok
lodash 4.17.21 2021-02-20 okStatus values: ok, deprecated, not found, error: <detail>.
Rules
- Use the script instead of manual curl — it handles URL encoding (especially for scoped npm packages like
@types/node) and fetches multiple packages in parallel, so it's both easier and faster. - Flag deprecated packages — if the status column says
deprecated, tell the user and suggest an alternative if you know one. - Batch lookups when possible — the script accepts multiple package names in one call, which is faster than running it once per package.