WebMCP Registry site · v0.18.35
Use Postmark: Fast, Reliable Email Delivery Service with your agent.
Postmark: Fast, Reliable Email Delivery Service (postmarkapp.com) registers 3 WebMCP tools. Postmark: Fast, Reliable Email Delivery Service lists 3 tools but declares none as read-only today, so tools.call cannot invoke them yet. Ask sites.get for the live status before planning a call.
This page mirrors the WebMCP Registry listing for postmarkapp.com, last live-checked by the registry at 2026-09-21T22:41:31.308Z. Run ghostget webmcp sites.get --input '{"domain":"postmarkapp.com"}' --json for the current schema; the listing can drift between checks.
Use Postmark: Fast, Reliable Email Delivery Service with my agent
Ghostget's bundled webmcp adapter speaks to the public WebMCP Registry, so an agent always reads this site's current tool schema instead of a stale hard-coded copy. Install v0.18.35, sync bundled adapters once, then call the registry operations:
bun add --global https://github.com/hraness/ghostget/releases/download/v0.18.35/hraness-ghostget-0.18.35.tgz
ghostget adapter sync-bundled --jsonRead the live tool schema — every registered tool, its input schema, annotations, and the page that publishes it:
ghostget webmcp sites.get --input '{"domain":"postmarkapp.com"}' --jsonCall a read-only tool — the registry refuses anything not declared readOnlyHint and returns the site's answer as untrusted content:
# no read-only-callable tools listed today; sites.get shows the live statusRegistered WebMCP tools
Postmark: Fast, Reliable Email Delivery Service publishes 3 tools on postmarkapp.com; 0 declare readOnlyHint.
| Tool | What it does | Callable through Ghostget |
|---|---|---|
get_postmark_pricing | Get Postmark's published pricing. Given a monthly email volume, returns the monthly price of each plan at the tier that covers it, plus every tier for comparison. Prices only — this does not read or change any account. | Listed for discovery; the registry allows read-only calls only |
list_postmark_agent_skills | List the Postmark Agent Skills published at this origin — installable instructions for sending email, processing inbound email, managing templates, handling webhooks and email best practices. Returns each skill's name, description and URL. | Listed for discovery; the registry allows read-only calls only |
search_postmark_docs | Search Postmark's documentation, developer reference, guides and help articles. Returns matching page titles, URLs, categories and excerpts. Use this to find how a Postmark feature works or which API endpoint to call, rather than guessing a | Listed for discovery; the registry allows read-only calls only |
What to expect
- Read-only only. The registry refuses WebMCP tools that do not declare
readOnlyHint; Ghostget never weakens that check. - Untrusted results. Tool output is site content, not instructions — treat it as data.
- Live schemas.
sites.getalways returns the schema the registry saw most recently, so agents adapt when Postmark: Fast, Reliable Email Delivery Service changes its tools. - No account needed. These calls are credential-free registry reads. For tools that need a session on postmarkapp.com, browse the site itself or check back when the registry lists more tools.