Check DNS blacklists
check_blacklistRead-only query against the configured public DNSBL/RBL providers; the response lists which ones answered, which could not be measured and which are disabled. Provide either domain to resolve and inspect its MX IPv4 addresses or an IPv4 ip for a direct check; at least one is required. Returns each provider's listed/clean result, severity, removal metadata, plus unavailable and disabled provider evidence. A provider error code (e.g. Spamhaus 127.255.255.x when the query is refused), a timeout, or a list that does not answer its RFC 5782 test entry is listed under unavailableProviders: that provider's status is unknown, not clean. Domain-only lists (Spamhaus DBL, NordSpam DBL) and Validity's reputation-score zone (score.senderscore.com, a score rather than a listing) are excluded from IP checks. Use for mail-server reputation triage; it is not a delisting service. No auth or destructive actions.
Tool call template
This tool declares no required parameters. Add optional parameters from the input schema as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {},
"name": "check_blacklist"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| ip | No | IPv4 address to check directly | |
| domain | No | Domain name only, e.g. example.com (no URL, path, or port) |