Lob for AI agents
Send physical letters and postcards; verify addresses.
What your agent can do with Lob
Lob: send physical letters and postcards; verify addresses. Through AMXP your agent calls it like any other tool: no Lob account, no separate API key and no extra subscription. The call is priced up front and paid from your AMXP balance.
Lob is on the AMXP roadmap and not callable yet. Everything on this page describes how it will work once its connector ships.
How to call it
The same three calls work for every provider. Your agent does this on its own once AMXP is installed.
// Find the right Lob endpoint, check its price, then run it.
const [tool] = await amxp.discover({ provider: "lob" })
const spec = await amxp.inspect(tool.id) // parameters, price per call
const result = await amxp.execute(tool.id, { /* params from spec */ })What Lob charges
Developer: postcards from $0.905/piece, letters from $0.828/piece, checks from $1.190/piece; US address verification $0.05 each, international $0.07 each
- Model
- Subscription + usage
- Currency
- USD
- Free tier
- Yes
Developer plan: $0/month, up to 6,000 mailings, 1 user; pay per piece and per address verification
Prices as of 2026-11-02, source: https://lob.com/pricing.
Pricing through AMXP
0% markup, pay per call. Your agent sees Lob's own price from amxp.inspect() before it runs anything, the amount is reserved from your balance, and only the real cost is settled. No monthly fee, no Lob account. How pricing works
Alternatives in Print & Mail
Your agent can compare these by fit and price with amxp.discover() and pick per task.
