Who it is for
Operations and marketing teams that send physical mail programmatically.
Overview
What PostGrid does
PostGrid sends physical mail through an API and verifies postal addresses. The connector covers both: address validation with appended detail such as census information, and dispatch of letters, postcards, cheques, self-mailers, and snap packs, either as one-off transactional pieces like account statements and claims notices or as campaigns.
Mailing lists can be built from demographic and geographic filters, and mailings tracked and reported on afterwards. Six tools cover that scope. A PostGrid account is required, which matters more here than for a read-only service, because the actions on this surface put paper in the post and cost money each time they run.
Tool surface
Six tools stand behind a credential check, and the gate is doing real work in this case, since the actions described are physical and billable rather than reversible reads.
Availability
Where PostGrid is listed
PostGrid is listed in the Claude connectors directory only. PostGrid has no app under the same domain in the ChatGPT directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
The MCP server behind a Claude connector is usually the same server a ChatGPT app would need, so the absence is a distribution decision rather than a technical one.
Claude listing
In the Claude connectors directory
PostGrid publishes 6 tools to Claude. That is a mid-sized surface: 28.1% of the 1,253 Claude-listed connectors expose fewer.
The median Claude-listed connector filed under Developer Tools publishes 13, so this one sits 7 tools below its bucket's median, 64th of 95.
It falls in the 4-6 tools band, which holds 16.2% of the Claude directory.
PostGrid publishes a remote MCP endpoint. Claude connects to it over HTTP; there is nothing to install locally.
Every connector in the Claude directory is remote, all 1,253 of them, so transport is not a differentiator there.
- Publisher
- PostGrid
- Verification
- Community-listed (61.5% of the Claude directory)
- Filed under
- Developer Tools
- Endpoint
-
https://mcp.postgrid.com/mcp - Documentation
- Publisher setup docs
- Published tools
- 6 · 4-6 tools band
- Depth rank in Developer Tools
- 64 of 95
- Snapshot
- August 2026
PostGrid is community-listed in the Claude directory, the tier 770 of 1,253 connectors sit in (61.5%). It is the default for a self-published server, and says nothing either way about quality.
In the publisher's words
How PostGrid describes it
This connector provides the full power of the PostGrid platform to Claude: - Verify postal addresses, appending details such as census info and more - Design and launch direct mail campaigns including sending letters, postcards, checks, self-mailers, and snap packs - Send one-off or automated transactional mailings (account statements, insurance claims notices, etc) - Build targeted mailing lists from demographic and geographic filters to maximize direct mail ROI - Run analytics and provide insights into your PostGrid mailings, including tracking your mailings at scale
Quoted from the connector's own Claude directory listing as captured in August 2026. Node8 did not write it and does not vouch for it.
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This is an independent catalogue entry compiled by Node8 from PostGrid's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with PostGrid, and inclusion here is not an endorsement.
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