M Blacklist

Threat-intelligence API, free to read

Monitoring B2B REST API EN

What it does

A centralised threat feed for abusive IP addresses, IP ranges and e-mail domains. Reads are free and need no account, e-mail data exists only as SHA-256 digests, and a k-anonymity endpoint lets you test an address without ever sending it.

Features

Free reads, no key, no account
IP addresses, IP ranges, e-mail hashes and e-mail domains
k-anonymity lookup: test an address without disclosing it
Incremental feed for mirroring the list locally
Reporting and appeal endpoints, so entries can be challenged
OpenAPI 3.0.3 specification and full developer docs

The API

REST, JSON, conventional HTTP status codes and UTC timestamps. One request looks like this:

A single M Blacklist API request, end to end

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