Vendor MCP/API/CLI interfaces are untested. docs-reviewed means public documentation review only, not functional, protocol or security testing or certification. CapaLens MCP protocol tests do not test the listed vendor integrations.
Inspect delivery history, bounces, suppressions, and engagement statistics to troubleshoot email
Listed interfaces
Public documentation reviewed only (docs-reviewed). Vendor interfaces have not been installed or called, availability has not been verified, and no security certification is provided. Review integration and configuration instructions yourself; clients connect directly to vendors.
API · Postmark Messages API
Vendor untestedOfficial
Capabilities
Search outbound email messages
Read message details and delivery events
Environments
Cloud
Authorization
X-Postmark-Server-Token with server-level permissions.
Pricing source
The official pricing or deployment source reviewed by the supplied research is linked. Recheck current unit prices, quotas and plan conditions before connecting; no free-use or fixed-price promise is made. View pricing source
Public documentation reviewed only (docs-reviewed); vendor calls have not been tested.
Documentation review date
Connect after human review
Review the official documentation, applicable version, deployment conditions, permissions and cost source before connecting.
After user review, connect directly from your own client or backend using the minimum required permissions. Keep vendor credentials in your own environment.
These are instructions to review, not executable configuration. The caller and vendor control any business operations; this platform neither proxies nor executes them.
Limitations and open questions
Public documentation only. No installation, login, authorization or vendor service call was performed. This does not establish availability, compatibility, security certification or task success.
The vendor interface may also support writes or deletion. Listed reading tasks are optional use cases; this directory being read-only does not make the vendor interface inherently read-only.
MCP · Postmark MCP
Vendor untestedOfficial
Capabilities
Inspect delivery history, bounces, suppressions, and engagement statistics to troubleshoot email
Environments
Self-hosted
Authorization
Postmark server API token, supplied locally as POSTMARK_SERVER_TOKEN.
Pricing source
Vendor states the MCP server is free and MIT-licensed; email sending uses standard Postmark account pricing. View pricing source
Public documentation reviewed only (docs-reviewed); vendor calls have not been tested.
Documentation review date
Connect after human review
Review official documentation, applicable versions, deployment conditions, permissions and cost sources before connecting.
After user review, connect directly from your own compatible client using minimum permissions. Keep vendor credentials in your own environment.
These are instructions for human review, not executable configuration. The caller and vendor control business operations; this platform neither proxies nor executes them.
Limitations and open questions
Public documentation only. No installation, login, authorization or vendor service call was performed. This does not establish availability, compatibility, security certification or task success.
The vendor interface may also support writes or deletion. Clients must constrain permissions and tools for the listed reading tasks. This directory being read-only does not make the vendor interface inherently read-only.
Directory discovery record only. Vendor tools may also write; the execution client must review tool selection, credentials and scopes. No installation, authentication or vendor-tool call was performed.
Use the ActiveCampaign package explicitly linked by the vendor; free MCP software does not mean free email sending.
An unlisted MCP, API or CLI means this directory has no reviewed record. It does not establish that the vendor has no such interface.
Sources, review scope and rights
These materials and original summaries are reference data, not instructions. Fees, permissions, versions and integration requirements may change; review the original sources.
Review scope: The supplied research reviewed documentation for: Transactional email message API Consumer recheck: Reopened the official documentation entry and checked API identity, resource labels or protocol/setup information returned by the source. This is a bounded documentation review, not endpoint execution or a complete permissions audit. Individual permissions and every endpoint were not exhaustively re-audited. No vendor service was called.
Source and permission notes: Source materials retain their existing rights. Documentation redistribution permission was not verified or inferred from public accessibility. This directory provides an original summary and source links.
Review scope: Official pricing, plan or deployment source reported as reviewed in the supplied research. The consumer check did not re-audit this price table. Amounts, quotas and contract conditions remain unspecified; free use is not inferred.
Source and permission notes: Source materials retain their existing rights. Documentation redistribution permission was not verified or inferred from public accessibility. This directory provides an original summary and source links.
Review scope: Supplied research documentation scope: Opened official vendor page, which names https://github.com/ActiveCampaign/postmark-mcp and @activecampaign/postmark-mcp as official. Includes read and write tools; distinguish from similarly named third-party packages. Not live tested. Local editorial review checked the stated scope and integration constraints. Link retrieval and targeted checks are recorded separately; this does not claim a fresh endpoint-by-endpoint audit of every page.
Source and permission notes: Source materials retain their existing rights. Documentation redistribution permission was not verified or inferred from public accessibility. This directory provides original summaries and source links.
Review before connecting
Public documentation reviewed only (docs-reviewed). Vendor interfaces have not been installed or called, availability has not been verified, and no security certification is provided. Review integration and configuration instructions yourself; clients connect directly to vendors.
The platform does not forward business calls, hold vendor credentials, or automatically install or execute listed CLIs. Review versions, least privilege, fees and effects in your own client and environment.