Postgrid MCP server

Connect Postgrid to Claude, ChatGPT, Cursor, Claude Code, Codex, Gemini, GitHub Copilot and any other MCP client, for your whole team. Metorial adds security, governance, and tracing, and gives everyone one Magic MCP URL to connect.

What you can do with the Postgrid MCP server

Ask your agent in plain language. Each of these maps to a real tool on the server.

  • Use the list contacts tool in Postgrid
  • Use the cancel mail order tool in Postgrid
  • Use the verify international address tool in Postgrid
  • Use the autocomplete address tool in Postgrid
  • Use the send self mailer tool in Postgrid
  • Use the verify address tool in Postgrid

Supported Tools

list_contacts

List Contacts

List and search contacts in PostGrid. Supports pagination and text search to find specific contacts.

cancel_order

Cancel Mail Order

Cancel a PostGrid mail order that has not yet been printed. Only orders with status "ready" can be cancelled. Supports letters, postcards, cheques, and self-mailers.

verify_international_address

Verify International Address

Verify and standardize an international postal address across 245+ countries using PostGrid. Accepts either a freeform address string or structured address fields.

autocomplete_address

Autocomplete Address

Get type-ahead address suggestions for US and Canadian addresses. Provide a partial street address and receive matching completions. No lookup is consumed for preview suggestions.

send_self_mailer

Send Self-Mailer

Send a physical self-mailer (folded mail without an envelope) through PostGrid. Provide content as template IDs, HTML, or a PDF URL.

verify_address

Verify Address

Verify and standardize a US or Canadian postal address using PostGrid's CASS/SERP-certified database. Accepts either a freeform address string or structured address fields. Returns the standardized address and verification status.

autocomplete_international_address

Autocomplete International Address

Get type-ahead address suggestions for international addresses across 245+ countries. Provide a partial street address and optionally filter by country.

get_order

Get Mail Order

Retrieve the details and current status of a PostGrid mail order. Supports letters, postcards, cheques, and self-mailers. Provide the order ID and the tool will automatically detect the order type from the ID prefix.

send_letter

Send Letter

Send a physical letter through PostGrid. Specify the recipient and sender as contact IDs or inline addresses. Provide content as a template ID, raw HTML, or a PDF URL. Supports options like color printing, double-sided, mailing class, and scheduled send dates.

create_contact

Create Contact

Create a new contact in PostGrid for use as a sender or recipient in mail orders. Contacts store name, company, address, and contact information that can be reused across multiple mailings.

list_templates

List Templates

List and search PostGrid templates. Returns template IDs and descriptions for use in mail orders.

send_postcard

Send Postcard

Send a physical postcard through PostGrid. Provide front and back content as template IDs, HTML, or a 2-page PDF URL. Supports sizes 6x4, 9x6, and 11x6.

send_cheque

Send Cheque

Send a physical cheque (check) through PostGrid. Requires a bank account ID, amount in cents, and recipient. Optionally attach an invoice letter using a template, HTML, or PDF.

create_template

Create Template

Create a reusable HTML template in PostGrid for letters, postcards, or self-mailers. Templates support merge variables using `{{variableName}}` syntax for dynamic personalization.

Connect Postgrid to your AI client

Every client uses the same Magic MCP URL, and so does any other MCP client. Add it once and sign in with SSO.

  1. Enable Postgrid in Metorial. In your Metorial portal, enable the Postgrid MCP server and sign in with the account that owns the data. Access stays governed by your team policies.
  2. Add a custom connector. Open Customize, then Connectors. Select Add, then Custom, then Web.
  3. Paste your Metorial MCP URL. Name it Metorial, paste your Magic MCP URL (<your-magic-mcp-url>) and continue.
  4. Sign in. Select Add and sign in to load Postgrid tools.

Run Postgrid through the Metorial gateway

One governed layer for every app your agents reach, not a separate connector per tool.

  • Give Postgrid and every other app to your whole team through one MCP gateway, behind your SSO.
  • Scope which teams and agents can use Postgrid tools with role-based access control, and trace every call.
  • Prefer to run it yourself? Metorial is open source and self-hostable.

More integrations teams use with Postgrid

Notion

Create, read, update, and archive pages and databases in a Notion workspace. Manage blocks (paragraphs, lists, headings, embeds, etc.) within pages. Query databases with filters and sorts across rich property types including text, numbers, dates, selects, relations, and formulas. Search across pages and databases by title. Add and read comments on pages and blocks. Upload files to pages. Manage workspace users and retrieve user profiles.

Google Sheets

Create, read, and update spreadsheets and their cell data. Read and write values to individual cells, ranges, or multiple ranges using A1 notation or named ranges. Apply cell formatting including text styles, backgrounds, borders, number formats, and conditional formatting. Manage sheets (tabs) within a spreadsheet—add, delete, copy, rename, and reorder them. Create and manage embedded charts, pivot tables, filter views, data validation rules, protected ranges, named ranges, and merged cells. Perform batch operations to apply multiple updates atomically.

Slack

Slack: connect with bot OAuth or user OAuth to work with messages, conversations, search, files, Canvases, Lists, profiles, reactions, reminders, and workspace productivity settings.

Salesforce

Manage CRM data including Accounts, Contacts, Leads, Opportunities, Cases, and custom objects. Create, read, update, and delete records. Query data using SOQL and search across objects using SOSL. Perform bulk data operations for large-scale imports, exports, and migrations. Execute composite requests to batch multiple operations in a single API call. Access analytics, reports, and dashboards. Manage files and attachments associated with records. Interact with Chatter feeds, posts, and groups for social collaboration. Manage org metadata including custom objects, fields, layouts, and workflows. Query data using GraphQL for precise data retrieval across related objects.

Apolloio

Search and prospect B2B contacts and companies from a database of over 275 million people and 70 million organizations. Enrich people and company data with emails, phone numbers, and firmographic details. Create and manage contacts, accounts, deals, and tasks. Add contacts to email sequences and manage sequence statuses. Log and search call records. Perform bulk operations for contact creation, account creation, task creation, and data enrichment.

Sharepoint

Manage SharePoint sites, document libraries, lists, and files. Create, read, update, and delete lists and list items with custom columns. Resolve site users to numeric Person/Group LookupId values. Upload, download, move, copy, and version files in document libraries. Search across sites, files, folders, lists, and list items using Microsoft Search. Manage permissions at site, list, and item levels with granular access control. Define and manage content types and site columns. Retrieve site properties and search for sites across Microsoft 365.

Technical notes for Postgrid

Send physical letters, postcards, cheques, and self-mailers through PostGrid. Create and retrieve contacts, create and update reusable HTML templates, and list, track, or cancel mail orders. Verify and autocomplete domestic and international postal addresses. Download available PDF previews.

Frequently asked questions

Common questions about connecting Postgrid to AI agents with Metorial.

  1. How many tools does the Postgrid MCP server have?
    The Postgrid MCP server exposes 14 tools, including List Contacts, Cancel Mail Order, Verify International Address. Each one is governed and traced through Metorial.
  2. Postgrid exposes tools your agents call on demand; it does not publish event triggers yet. Everything still runs through one governed MCP URL.
  3. Any MCP client, including VS Code, Windsurf, Zed, OpenCode and Grok. Each one reaches the Postgrid MCP server through the same Metorial URL.
  4. Use role-based access control to decide which teams, users, and agents can use Postgrid and which of its tools they can call.
  5. Yes. Metorial is open source, so you can run the Postgrid MCP server yourself or use the hosted gateway.

Connect Postgrid to production AI agents

See how Metorial gives your team governed access to Postgrid, with tracing and security controls built in.