# Postage Stamp Price Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Postage Stamp Price

Look up current USPS stamp and postage prices and work out what a letter or card costs to send.

- Record: https://musedirectory.ai/connector/postage-stamp-price
- Category: Lifestyle
- Developer: theluckystrike
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 306ms, checked 2026-11-07T02:16:06Z
- Endpoint: https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-11-05T18:11:06Z)
- Source: Found in the official MCP Registry (io.github.theluckystrike/postage-stamp-price-mcp) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.theluckystrike%2Fpostage-stamp-price-mcp

Connects to USPS Notice 123 retail rates. Muse can check the current Forever stamp, postcard and international prices, calculate postage for a letter, flat or card by weight and destination, count how many stamps a piece needs, and list Priority Mail flat rate prices.

Example request: "How many Forever stamps do I need to send 40 holiday cards to Canada?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Postage Stamp Price to help me. It is a free service with an MCP server at https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- get_stamp_price: The current USPS Forever stamp price (First-Class Mail 1 oz stamped letter), the 2, 3 and 3.5 oz prices, metered letter prices, postcard, 1 oz large envelope, the nonmachinable surcharge and the 1 oz international letter (Global Forever) price, read at call time from USPS Notice 
- calculate_letter_postage: Retail postage for one letter, postcard or large envelope (flat) by weight, to the US, Canada, Mexico or any other country, with the nonmachinable surcharge for square or rigid cards, the total for a quantity, and the number of Forever stamps per piece. Letters up to 3.5 oz, US l
- get_flat_rate_prices: Current USPS retail prices for Priority Mail Flat Rate envelopes and Small, Medium, Large and APO/FPO/DPO Flat Rate Boxes, and Priority Mail Express Flat Rate envelopes, from Notice 123.

Screening checks:
- MCP handshake: pass (Answered in 402ms)
- Domain against threat feeds (Cloudflare security DNS): pass (postage-stamp-price-mcp.lipmichal.workers.dev not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (3 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)