Excession Labs: site, models and security test requests

Excession Labs MCP servers

Three hosted, remote MCP servers (Streamable HTTP) run by Excession Labs, a security lab. They are listed in the official MCP Registry. This repository documents them: endpoints, tools, input schemas and examples. The servers are hosted; you connect to the URLs below and install nothing.

Server (registry name)	URL	Tools
com.penetrationtestservices/site	https://penetrationtestservices.com/mcp	check_security_headers, request_pentest, search_site, get_page, how_to_contact
com.pentestcompare/site	https://pentestcompare.com/mcp	list_providers, get_provider, search_site, get_page, how_to_contact
com.airedteamingservices/site	https://airedteamingservices.com/mcp	request_pentest (AI application assessments), search_site, get_page, how_to_contact

Full tool definitions: servers/<site>.tools.json. Server cards: servers/<site>.server-card.json. Registry entries: servers/<site>.server.json.

Auth and limits

Reading needs no credential: 120 requests a minute per IP. An optional anonymous agent key from POST https://<site>/agent/auth raises that to 600 a minute (details in https://<site>/auth.md).

request_pentest needs the key. It sends a test request to Excession Labs for a person who asked for one. person_consent and authorized must be true. Excession Labs replies to the person by email, and testing starts only after a written scope and written authorization. Limits: 5 requests a day per key and 3 a day per email address. Never send passwords, keys or customer data.

Every other tool is read-only.

Connect

Claude Code:

claude mcp add --transport http pentestcompare https://pentestcompare.com/mcp
claude mcp add --transport http penetrationtestservices https://penetrationtestservices.com/mcp

Or install the plugin that bundles these servers with security review skills: https://github.com/Excession-Labs/claude-plugins

Any MCP client that supports Streamable HTTP can use the URLs above.

Example

curl -s https://penetrationtestservices.com/mcp -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_security_headers","arguments":{"url":"https://example.com"}}}'

Data and sources

Provider facts come from each provider's own public pages, with the date checked: https://github.com/Excession-Labs/pentest-provider-dataset. Excession Labs publishes PentestCompare and also sells security testing; its own row is marked publisher_owned.

Licence: MIT.