AgentIndex icon
AgentIndex
vastlint logo
vastlint
★ 19
vs
xgrep logo
xgrep
★ 20

vastlint vs xgrep

vastlint: VASTlint is a high-performance VAST XML validator built on a pure-Rust core, designed to check ad tags against the IAB Tech Lab VAST specification. It ensures compliance across multiple VAST versions and various other internet standards, helping to prevent malformed tags that cause lost impressions and revenue discrepancies.; xgrep: xgrep is an ultra-fast indexed code search engine designed for repeated searches on large codebases by humans and AI agents. It pre-builds a trigram inverted index, enabling search operations in milliseconds, and includes an MCP server for AI coding tools.

01

TL;DR

vastlint logo
vastlintDev Tooling · ★ 19

In-process VAST validation within ad tech infrastructure such as SSPs, DSPs, and SSAI platforms to ensure real-time bid response quality.

Read vastlint full review →
xgrep logo
xgrepDev Tooling · ★ 20

Accelerating repeated searches on large codebases.

Read xgrep full review →
02

Side-by-Side Comparison

Field
vastlint logovastlint
xgrep logoxgrep
Category
Dev Tooling
Dev Tooling
Stars
★ 19
★ 20
License
Apache-2.0
MIT
Install Command
cargo install vastlint
cargo install xgrep-search
Updated
1d ago
3d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
VAST XML, Validator, Ad Tech
Indexed Search, Code Search, Developer Tools
03

Features

vastlint logovastlint
01High-performance VAST XML validation with sub-millisecond latency for real-time ad pipelines.
02Comprehensive rule set (232 rules) covering IAB VAST, W3C XML, URI syntax, MIME types, and more.
03Wide range of integrations including CLI, Docker, Rust library, Go, Java, Elixir, JavaScript/TypeScript (WASM), VS Code extension, Chrome extension, MCP server, and REST API.
04Auto-fix capabilities for common issues and enterprise readiness with zero runtime dependencies in the core.
05Verifiable build provenance (SLSA Build Level 2) and continuous fuzz-testing for security and reliability.
xgrep logoxgrep
01Indexed search for speed
02Built-in MCP server for AI tools
03LLM-optimized Markdown output
04Git-aware searching
05Fast file discovery
04

Use Cases

vastlint logovastlint
↳In-process VAST validation within ad tech infrastructure such as SSPs, DSPs, and SSAI platforms to ensure real-time bid response quality.
↳Integrating into CI/CD pipelines to automatically check VAST tags for compliance before deployment.
↳Enhancing AI agents (e.g., Claude, Cursor) with `validate_vast` and `fix_vast` tools via Model Context Protocol (MCP) for automated creative trafficking.
↳Developer tooling through CLI, VS Code extension, and Chrome extension for manual inspection, validation, and fixing of VAST XML.
↳Providing VAST validation as a service via a hosted web validator or RapidAPI endpoint for external applications and quick checks.
xgrep logoxgrep
↳Accelerating repeated searches on large codebases.
↳Integrating fast code search into AI coding tools.
↳Efficiently discovering files using glob patterns.
↳Analyzing code changes in Git repositories.
FAQ

FAQ

What is the difference between vastlint and xgrep?
Both vastlint and xgrep are in the Dev Tooling category. vastlint has 19 stars, while xgrep has 20 stars.
Which is better, vastlint or xgrep?
The best choice depends on your use case. Choose vastlint if In-process VAST validation within ad tech infrastructure such as SSPs, DSPs, and SSAI platforms to ensure real-time bid response quality., and xgrep if Accelerating repeated searches on large codebases..
Is vastlint free or open source?
Yes, vastlint is open source on GitHub (Apache-2.0).
Is xgrep free or open source?
Yes, xgrep is open source on GitHub (MIT).
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