VASTlint is an MCP server with 15 tools an agent can call, among them calibrate_content, create_content_standards, delete_content_standards. It answers at https://vastlint.org/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 21 October 2026, succeeded.
Validate VAST, VMAP, and DAAST ad tags against IAB specs. 232 rules, pure Rust core.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
calibrate_content | 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 check before launching a campaign. Requi Inputs: account, standards_id, artifact, idempotency_key, context |
create_content_standards | 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 standards_id that can be used with calibr Inputs: account, scope, policies, idempotency_key, context |
delete_content_standards | 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 first. Requires Bearer authentication. Inputs: account, standards_id, idempotency_key, context |
explain_rule | 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 understanding and fixing VAST issues flagged by val Inputs: rule_id |
fix_vast | 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 applied (rule ID + description + path), a Inputs: xml, wrapper_depth |
get_adcp_capabilities | 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 — it declares which VAST creative features Inputs: adcp_major_version, protocols, context |
get_content_standards | AdCP content-standards specialism. Retrieves the full details of a specific content standard, including all policies and their enforcement levels. Requires Bearer authentication. Inputs: account, standards_id, context |
inspect_vast | 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 (with MIME type, dimensions, bitrate, URL), Inputs: url, max_depth |
list_content_standards | 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 built-in catalog of VAST-relevant standards. Inputs: account, pagination, max_results, page_token, context |
list_creatives | 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 rather than stored. Requires Bearer auth Inputs: max_results, page_token, context |
list_rules | 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 from this list with explain_rule for fu |
update_content_standards | 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. Inputs: account, standards_id, policies, idempotency_key, context |
validate_content_delivery | 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 overall summary. Requires Bearer authenticat Inputs: account, standards_id, records, context |
validate_vast | 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 warning or info count. Use wrapper_depth Inputs: xml, wrapper_depth |
validate_vast_url | 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 VAST URLs rather than raw XML -- use thi Inputs: url, max_depth |
Every block below points at https://vastlint.org/mcp. Pick your client and copy.
claude mcp add --transport http vastlint https://vastlint.org/mcp
{
"mcpServers": {
"vastlint": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://vastlint.org/mcp"]
}
}
}{
"mcpServers": {
"vastlint": {
"url": "https://vastlint.org/mcp"
}
}
}{
"servers": {
"vastlint": {
"type": "http",
"url": "https://vastlint.org/mcp"
}
}
}{
"context_servers": {
"vastlint": {
"url": "https://vastlint.org/mcp"
}
}
}{
"mcpServers": {
"vastlint": {
"serverUrl": "https://vastlint.org/mcp"
}
}
}{
"mcpServers": {
"vastlint": {
"url": "https://vastlint.org/mcp"
}
}
}name: VASTlint
version: 0.0.1
schema: v1
mcpServers:
- name: VASTlint
type: streamable-http
url: https://vastlint.org/mcp{
"mcpServers": {
"vastlint": {
"httpUrl": "https://vastlint.org/mcp"
}
}
}{
"mcpServers": {
"vastlint": {
"type": "http",
"url": "https://vastlint.org/mcp"
}
}
}{
"mcpServers": {
"vastlint": {
"url": "https://vastlint.org/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fvastlint.org%2Fmcp&type=streamable_http&id=vastlint&name=VASTlint
It answered our last check on 21 October 2026 in 147 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
15, as returned by the server's own tools/list on 13 September 2026: calibrate_content, create_content_standards, delete_content_standards, explain_rule, fix_vast, get_adcp_capabilities, get_content_standards, inspect_vast, and 7 more.
It answered our last check on 21 October 2026 in 147 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://vastlint.org/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.aleksuix. Endpoint host: vastlint.org. ARD identifier: urn:air:io.github.aleksuix:mcp:vastlint.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.