WebMCP Registry site · v0.18.35
Use PostalForm with your agent.
PostalForm (postalform.com) registers 7 WebMCP tools. 1 of 7 tools declares readOnlyHint, so an agent can invoke it through tools.call. The registry runs the tool in a fresh headless page on postalform.com and returns untrusted site content.
This page mirrors the WebMCP Registry listing for postalform.com, last live-checked by the registry at 2026-09-23T03:44:31.070Z. Run ghostget webmcp sites.get --input '{"domain":"postalform.com"}' --json for the current schema; the listing can drift between checks.
Use PostalForm 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":"postalform.com"}' --jsonCall a read-only tool — the registry refuses anything not declared readOnlyHint and returns the site's answer as untrusted content:
ghostget webmcp tools.call --input '{"domain":"postalform.com","tool":"postalform.get_workflow_state","input":"{}"}' --jsonRegistered WebMCP tools
PostalForm publishes 7 tools on postalform.com; 1 declare readOnlyHint.
| Tool | What it does | Callable through Ghostget |
|---|---|---|
postalform.get_workflow_state | Return the current PostalForm home workflow state, including step, addresses, delivery settings, and submit readiness. | Callable read-only tool |
postalform.go_to_step | Jump to a specific workflow step by index (0-6) or step id (upload, recipient_address, recipient_name, sender_name, sender_address, review, submission). | Listed for discovery; the registry allows read-only calls only |
postalform.set_delivery_options | Update delivery and print options on review: color, double-sided, mail class, certified, and certified electronic return receipt. | Listed for discovery; the registry allows read-only calls only |
postalform.set_pdf_from_data_url | Set the workflow PDF using a data:application/pdf;base64 URL, then optionally advance to the recipient-address step. | Listed for discovery; the registry allows read-only calls only |
postalform.set_recipient_details | Update recipient name and/or recipient address in the home workflow. Can optionally advance to the next relevant step. | Listed for discovery; the registry allows read-only calls only |
postalform.set_sender_details | Update sender name and/or sender address in the home workflow. Can optionally advance to the next relevant step. | Listed for discovery; the registry allows read-only calls only |
postalform.submit_order | Submit the current order draft for checkout using the same validation and confirmation behavior as the review button. | 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 PostalForm changes its tools. - No account needed. These calls are credential-free registry reads. For tools that need a session on postalform.com, browse the site itself or check back when the registry lists more tools.