VASTlint
aleksander/vastlintValidate VAST, VMAP and DAAST ad tags against IAB specifications, including SIMID and OMID checks. The public tools validate_vast, validate_vast_url, inspect_vast, list_rules, explain_rule and fix_vast require no login. Connect directly to https://vastlint.org/mcp. AdCP content-standards tools require Bearer authentication. Hosted submissions may be stored with identifiers stripped to improve validation rules; see https://vastlint.org/privacy/. Local vastlint-mcp over stdio keeps tags on your machine. Built on the open-source Rust validation core. Apache-2.0 licensed.
Score: 100/100
Handshake verified by our own probe.
Tools · 15
Validate a VAST XML tag against the IAB VAST 2.0-4.3 specification. Returns all issues found with severity, rule ID, location, and spec reference. A document is valid when errors == 0, regardless of w…
Fetch a VAST tag from a URL and validate it. Handles redirects. Use max_depth to control how deep wrapper chains are followed (default 5, per IAB VAST 4.x recommendation). AI agents typically receive …
Follow a VAST wrapper chain from a URL, fetching and validating every hop. Returns each hop as a structured object: AdSystem, AdTitle, Duration, impression count, tracking event count, media files (wi…
List the full catalog of VAST validation rules available in vastlint. Returns rule IDs, default severities, and descriptions. Call this once and cache the result -- the catalog is static. Use rule IDs…
Get full details for a specific VAST validation rule: description, spec reference, severity, what triggers it, and how to fix it. Use rule IDs from list_rules. This is the primary tool for understandi…
Auto-fix a VAST XML tag. Applies all deterministic, safe fixes: HTTP → HTTPS upgrades in all URL-bearing elements, and removal of deprecated attributes. Returns the repaired XML, a list of every fix a…
AdCP protocol discovery. Returns the AdCP version, supported protocols, and governance capabilities of this vastlint agent. Call this first when integrating vastlint into an AdCP creative pipeline — i…
AdCP content-standards specialism. Lists content governance standards. When called with an 'account' object, returns buyer-defined standards stored for that brand. Without an account, returns the buil…
AdCP content-standards specialism. Creates a new set of content quality policies for a brand. Policies include brand safety rules, imagery quality requirements, and compliance constraints. Returns a s…
AdCP content-standards specialism. Retrieves the full details of a specific content standard, including all policies and their enforcement levels. Requires Bearer authentication.
AdCP content-standards specialism. Updates the policies on an existing content standard set. The supplied policies array replaces the existing policy set. Requires Bearer authentication.
AdCP content-standards specialism. Permanently removes a content standard set. Callers relying on the standards_id for calibrate_content or validate_content_delivery should retire those integrations f…
AdCP content-standards specialism. Evaluates a creative artifact against a content standard set before delivery. Returns a per-policy verdict and an overall pass/fail result. Use this as a pre-flight …
AdCP content-standards specialism. Validates that delivered creatives met the content standards. Accepts delivery records with creative references and returns per-record compliance status plus an over…
AdCP creative governance. Lists creatives known to this agent. For a validation-only agent like vastlint, this always returns an empty collection — creatives are validated on demand via validate_vast …
How to use
Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://vastlint.org/mcp
Cursor or Cline: add to your MCP config:
{
"mcpServers": {
"vastlint": {
"url": "https://vastlint.org/mcp",
"transport": "http"
}
}
}