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 context7 instead)

Workflow

DO NOT read script source code. Run scripts directly and use --help for usage.

1. 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

2. 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/gin

Output 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 ok

Status 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.