# Adstxt Parser, Demandbase Inc.

> Ads.txt parser operated by Demandbase, an account based marketing and advertising company. It reads publisher authorised seller files to validate programmatic inventory.

Source: https://docs.centinelanalytica.com/crawlers/adstxt-parser-demandbase-inc

## At a glance

- Operator: [Demandbase](https://www.demandbase.com)
- Type: Advertising

## How Centinel checks it

- **User agent**: The request calls itself this crawler. Anyone can send the same string.

Adstxt Parser, Demandbase Inc. publishes nothing Centinel can check a source against, so a match reports the name and leaves the source unconfirmed. The match tokens, verification domains, and address feeds are not published here.

## Allowing or blocking it

The [crawler object](https://docs.centinelanalytica.com/api/crawlers.md) in the `/validate` response sets `access_allowed` to `true` only for a verified source that your tenant allowlists. A [policy rule](https://docs.centinelanalytica.com/admin/policy.md) can allow or block this crawler by its category, `Advertising`.

[Back to the crawler catalog](https://docs.centinelanalytica.com/concepts/crawler-catalog.md)

[Crawlers with a source check](https://docs.centinelanalytica.com/crawlers.md)