PostAgent logo PostAgent

Send real mail with your agent.

PostAgent gives your agent the ability to draft, print and deliver physical mail in total autonomy.
Service currently available in the US only

Install via CLI npx skills add interpretai-tech/agent-tools --skill postagent-print-and-mail -g -a claude-code -y More options

From prompt to mailbox

Your agent handles the entire process from drafting to delivery.

01

Create

Your agent drafts a custom letter or fills a template. We automatically format it for physical printing.

02

Quote

We verify the addresses, provide a final visual preview, and lock in the exact delivery price.

03

Pay & send

Your agent approves the send. The letter is printed, stamped, and handed off to the postal service.

What can your agent send?

Give your AI the reach of the physical world.

Marketing & Outreach

Send highly personalized, AI-written letters or postcards to high-value leads and customers.

Operations

Mail physical return labels, employee onboarding packets, or operational notices without human intervention.

Invoices & Billing

Autonomously generate and mail physical invoices or past-due notices to clients who require paper records.

Legal & Compliance

Dispatch formal notices, compliance documents, or dispute letters with reliable physical delivery.

Install & connect

Choose your integration method and target agent.

Published on skills.sh. Walks your agent through the full flow.

global · claude code
npx skills add interpretai-tech/agent-tools \
  --skill postagent-print-and-mail -g -a claude-code -y

Restart your agent afterwards — skills load at startup. Use this per-agent command rather than the interactive picker so it installs to the right folder.

Remote MCP server — no install, no API key to start. Just point your client at the endpoint.

  1. Open ~/.cursor/mcp.json (create it if it doesn't exist).
  2. Add the PostAgent server below, then reload Cursor.
  3. Go to Settings → MCP and confirm PostAgent is connected.
~/.cursor/mcp.json
{
  "mcpServers": {
    "PostAgent": {
      "url": "https://api.postagent.sh/mcp"
    }
  }
}
  1. Open Settings → Developer → Edit Config to find claude_desktop_config.json.
  2. Add the PostAgent server, save, and fully restart Claude Desktop.
  3. The PostAgent tools appear in the tools menu of any chat.
claude_desktop_config.json
{
  "mcpServers": {
    "PostAgent": {
      "url": "https://api.postagent.sh/mcp"
    }
  }
}
  1. Most CLIs and runtimes accept a remote Streamable-HTTP MCP by URL.
  2. Add the entry to your client's mcp.json equivalent.
add via CLI
claude mcp add --transport http PostAgent \
  https://api.postagent.sh/mcp
  1. PostAgent speaks MCP over Streamable HTTP in stateless mode.
  2. Any compliant MCP client can connect with just the remote URL — no auth handshake to list tools.
transport: streamable-http
URL       https://api.postagent.sh/mcp
Transport streamable-http (stateless)
Auth      none to connect · x402 to send mail

Tool surface

Your agent gets the complete workflow: prepare the mail, check the details, send it, and follow delivery.

create_letterprepare

Give the agent a finished document and turn it into a print-ready letter.

create_templatepersonalize

Let the agent fill reusable templates for personalized mail at scale.

create_mail_quoteverify

Check sender and recipient addresses, preview the final piece, and get the exact send price.

prepare_mail_paymentauthorize

Prepare the payment step so the agent can act within your approval rules.

submit_paid_mail_jobsend

Submit the approved job for printing and USPS delivery.

get_mail_job_statustrack

Follow the job from processing through delivery with normalized status updates.

Read-only resources postagent://terms postagent://privacy postagent://formats postagent://pricing

Your agent has full autonomy

Your agent pays as you go for each piece of mail exactly when it needs to be sent, using its own wallet.

  • Flexible payments: The system accepts both USDC and credit cards. You only pay for what you send.
  • Zero risk: Verify first, settle last. A print failure never captures a charge.
  • Configurable autonomy: Your agent can ask for explicit confirmation before paying, or operate fully autonomously.
  • Reliable fulfillment: We partner with global leaders in logistics for dependable print and delivery.
FulfillmentPrint + USPS delivery
ServiceFirst-Class · 5-7 biz days
TrackingUSPS IMb · webhooks
CoverageUS → US documents
Protocolx402 · MPP
NetworkBase · eip155:8453
MethodsUSDC · Visa · Mastercard
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