MxToolbox API
mxtoolbox.com
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- From
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- Calls, 30 days
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- Ranked first
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Overview
Researched from the vendor's own pages; every fact links to its source and the day we checked it.
MxToolbox provides DNS, MX, SMTP and blacklist diagnostics and monitoring. Its REST API (api.mxtoolbox.com/api/v1) takes a UUID key in the Authorization header and is metered against daily usage limits.
Company
- Legal name
- Not confirmed
- Headquarters
- Not confirmed
- Founded
- Not confirmed
- Employees
- Not confirmed
- Ownership
- Not confirmed
- Kind
- Data provider
- Website
- Not confirmed
API
Verified- Access
- Self-serve API
- Style
- REST
- Auth
- API key (header)
- Base URL
https://api.mxtoolbox.com/api/v1- Features
- Bulk —Async —Webhooks —MCP —Sandbox —
- Rate limit
- Daily usage limits by plan; 429 when quota exceeded
- Docs
- Reference
Pricing
- Model
- subscription
- List prices
- Not published
- Free tier
- Not confirmed
- Checked
- Sep 29, 2026
Compliance
- SOC 2
- Not confirmed
- GDPR
- Not confirmed
- CCPA
- Not confirmed
- DPA
- Not confirmed
- Resale / storage
- Unknown until a written agreement says otherwise
Relationships
- Integrations
- Not confirmed
- Alternatives
- None named by the vendor
Sources (2)
- MxToolbox API productchecked Sep 29, 2026
- MxToolbox REST APIchecked Sep 29, 2026
Placement in the Grid
Where this vendor sits on the GridRouter Grid in each category it serves. No vendor pays for placement.
| Category | Placement | Execute | Coverage | Calls | Report |
|---|---|---|---|---|---|
| Email Sending & Deliverability | Not yet rated | – | – | 0 | View Grid |
API
The vendor's OpenAPI document as stored in the catalog, its operations, and the rate limits it publishes.
Rebuilt from the vendor's public docs, only what the pages show. Each operation links the page it came from; response shapes the docs don't spell out are left empty rather than guessed.
| Method | Path | Summary | Params | Source |
|---|---|---|---|---|
| GET | /lookup/blacklist/{domain} | Blacklist lookup | 1 | Docs |
| GET | /lookup/mx/{domain} | MX lookup | 1 | Docs |
Rate limits
Daily usage limits by plan; 429 when quota exceeded Without a published limit GridRouter paces conservatively (1 request per second).