# Book a Sponsor

> Find brands that already sponsor newsletters like yours, with sponsorship rates.

- name: com.bookasponsor/book-a-sponsor
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.bookasponsor%2Fbook-a-sponsor
- tools: https://api.protogrid.dev/v1/servers/com.bookasponsor%2Fbook-a-sponsor/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "book-a-sponsor": {
      "type": "http",
      "url": "https://bookasponsor.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-14d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 741 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 1 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 741 tokens to load them all
- tool set hash: cf73eeaab2fbfa376c98e0a9d435ff44
- tools last changed: 2026-10-07T22:09:01.769Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.bookasponsor/book-a-sponsor.svg)](https://protogrid.dev/servers/com.bookasponsor/book-a-sponsor)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-07 `list_brands_sponsoring_newsletters` changed (description)
  - before: Use this when someone asks which companies or brands sponsor newsletters, overall or in a topic such as AI, finance or marketing. Returns the brands seen in the most newsletters in the last 12 months, read from published issues.
  - after: Use this when someone asks which companies or brands sponsor newsletters, overall or in a topic such as AI, finance or marketing. Returns the brands seen in the most newsletters in the last 12 months, mostly read from published issues.

Full history: https://api.protogrid.dev/v1/servers/com.bookasponsor%2Fbook-a-sponsor/changes

## Remotes

- https://bookasponsor.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (4)

- `find_newsletter_sponsors`: Use this when someone who runs a newsletter asks which brands might sponsor it or how to find sponsors for it. Takes the newsletter's web address, finds similar newsletters, and returns the brands that sponsored them, with the newsletters and dates where each ad ran. Starts a scan of the public newsletter pages if none exists; a new scan takes about 15 to 60 seconds.
- `get_newsletter_sponsorship_rates`: Use this when someone asks how much to charge for a newsletter sponsorship or what newsletters charge for an ad. Returns the median price newsletters list for the main sponsor slot of one issue, by list size, read from their own advertise pages.
- `get_sponsor_scan`: Use this to read the result of a sponsor scan that find_newsletter_sponsors started, for example when it reported that the scan was still running. Takes the same newsletter web address.
- `list_brands_sponsoring_newsletters`: Use this when someone asks which companies or brands sponsor newsletters, overall or in a topic such as AI, finance or marketing. Returns the brands seen in the most newsletters in the last 12 months, mostly read from published issues.