Deploy and Host Email Domain Rollup on Railway

Count domains from supplied email-like strings.

About Hosting Email Domain Rollup

This is a stateless JSON tool. Deploy it, copy TOOL_TOKEN from service variables and send it as an Authorization: Bearer header on POST /run. The /health endpoint is public and returns readiness only. Inputs are limited to 64 KiB. The application does not store requests or call a model.

Why Deploy Email Domain Rollup

Call a deterministic operation from an agent, workflow or application without an LLM API key.

Common Use Cases

Count domains from supplied email-like strings.
Insert a deterministic check or transformation in a workflow.
Repeat the documented example in a regression check.

Dependencies for Email Domain Rollup

Python 3.13 container and a Railway project.
An HTTP client with your generated bearer token.

Example input for POST /run

{"emails": ["a@EXAMPLE.COM", "b@example.com"]}

Expected response

{"result": {"example.com": 2}}

The single process is intended for small internal workloads. Set concurrency and load limits upstream before serving high volume traffic.