Spotzee runs a set of tools that wrap the same checks the platform runs on every campaign. Each tool has two surfaces: a one-shot web version at spotzee.com/tools (paste a value, get an answer, no signup) and a programmatic version exposed through the Spotzee Extended API. The guides in this section are written for the API audience, where calls are billed against your Spotzee credit balance.Documentation Index
Fetch the complete documentation index at: https://docs.spotzee.com/llms.txt
Use this file to discover all available pages before exploring further.
Two ways to use the tools. The web versions at spotzee.com/tools are free for any visitor — no signup, no daily limit, no API key. The Extended API versions documented here run on credit-based pricing: every Spotzee account starts with $1 of free credit, then each call deducts a small per-call amount from that balance (figures vary by tool, see the Spotzee pricing page for live numbers). Pick the web version for one-off checks, the API for batch or automated workflows.
Use the tool when you need a single answer fast. Read the guide when you need to know what the answer means, what to do about it, and where it fits in the broader workflow.
Pick a tool by intent
| If you want to… | Start here |
|---|---|
| Filter junk addresses out of a list | Email syntax validator |
| Know which mailbox host a domain uses | Email provider check |
| Stop a blacklist listing from killing deliverability | Blacklist monitoring overview |
| Trace a delivery problem in your SMTP logs | Sendmux logs |
Email validation
Tools that check whether an address is real, who hosts it, and whether the domain is set up to receive mail.Email syntax validator
Check any address against RFC 5321 / 5322 format rules. Runs in-browser, no API call.
Email provider check
Identify the mailbox host (Gmail, Microsoft 365, iCloud, custom) for any domain.
Blacklist monitoring
Continuous monitoring for sending IPs and domains against real-time blacklists.Overview
What the tool watches, how it alerts, and how groups work.
Setup
Add IPs, add domains, pick a check cadence, configure alerts.
IPs
Manage monitored IPs, view per-IP history, run on-demand checks.
Domains
Manage monitored domains and inspect domain-blacklist results.
Groups
Group resources by client, brand, or product line for routed alerts.
Bulk import
Add many IPs or domains at once via CSV.
Alerts
Configure email and webhook notifications for new listings.
Troubleshoot
Common issues, false positives, and how to interpret historical patterns.
Sendmux integration
The companion tool for Spotzee customers running their own SMTP relay.Overview
What Sendmux does and how it integrates with the rest of Spotzee.
Logs
Inspect message-level delivery, bounce, and rejection logs.