Postmark API
postmarkapp.com
- Capabilities
- 0
- From
- n/a
- Calls, 30 days
- 0
- Ranked first
- 0 of 0
Overview
Researched from the vendor's own pages; every fact links to its source and the day we checked it.
Postmark (ActiveCampaign) is a transactional email service. Its API at api.postmarkapp.com authenticates with X-Postmark-Server-Token (or Account token) headers and supports single and batch sends; 429 signals excessive request rates.
Company
- Legal name
- Not confirmed
- Headquarters
- Not confirmed
- Founded
- Not confirmed
- Employees
- Not confirmed
- Ownership
- Not confirmed
- Kind
- Infrastructure
- Website
- Not confirmed
API
Verified- Access
- Self-serve API
- Style
- REST
- Auth
- API key (header)
- Base URL
https://api.postmarkapp.com- Features
- Bulk —Async —Webhooks YesMCP —Sandbox —
- Rate limit
- Not confirmed
- Docs
- Reference
Pricing
- Model
- subscription
- List prices
- Free $0.00/mo, 100 emails/month
- Basic $15.00/mo, from 10,000 emails
- Pro $16.50/mo, from 10,000 emails
- Currency
- USD
- Free tier
- 100 emails/month
- Overage
- Extra emails @ $1.80 / 1,000 (Basic)
- Checked
- Sep 29, 2026
Compliance
- SOC 2
- Not confirmed
- GDPR
- Stated
- 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 (3)
- Postmark pricingchecked Sep 29, 2026
- Postmark API overviewchecked Sep 29, 2026
- Postmark Email 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 |
|---|---|---|---|---|
| POST | Send a single email | 0 | Docs | |
| POST | /email/batch | Send batch emails | 0 | Docs |
Rate limits
No published rate limits found. Without a published limit GridRouter paces conservatively (1 request per second).