PostAgent

Sending mail spends real money and isirreversibleonce submitted. The skill always quotes first and requires explicit user confirmation before paying.

Claude Code(global) — always pass-a claude-codeso it lands in~/.claude/skills/, the only place Claude Code reads skills from:

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

Thenrestart Claude Code— the skill list is read once at session start, so a newly installed skill won't appear until you relaunch.

Other agents (auto-detected — installs to each agent's own skills dir, e.g..agents/skills/for Codex/Cursor/Gemini):

npx skills add interpretai-tech/agent-tools --skill postagent-print-and-mail -y

Without-a claude-code, the CLI may install only to the generic.agents/skills/path, whichClaude Code does not read— the skill will appear "installed" but never load.

-yskips the interactive scope/confirmation prompt. Drop it if you prefer to confirm the scope and review before install.
- Uploada document (free) — finished letter or{{field}}mail-merge template.
- Quote(free) — verifies sender/recipient addresses and locks an inclusive USDC price for 15 minutes.
- Pay— the agent's x402 wallet pays the quote'spaymentUrl; PostAgent prints and mails the letter.
- Track(free) — poll job status and USPS tracking.

- A US sender and US recipient address (2-letter state code, 5-digit/ZIP+4).
- An x402-capable wallet with USDC on Base mainnet to pay per send.

A public MCP server that gives AI agents access to real UK carrier phone numbers for SMS verification. Agents can rent disposable or rental numbers, pay Lightning invoices, and read incoming SMS, all through standard MCP tool calls with no authentication required.

Gives AI agents access to real-world people who listed themselves to be hired by agents. 31 tools including search by skill/location/equipment, job offers, job board listings, in-job messaging, and streaming payments. Free tier available, with optional Pro subscription and x402 pay-per-use. Payments default to crypto (USDC) but are flexible.

Interact with Africa's Talking airtime service and store transaction data in a local SQLite database.

MCP server for end-to-end encrypted, on-chain agent-to-agent messaging on COTI, with native-token rewards and starter grants. Built on Garbled Circuits. 18 tools, open source.

Agent-native helpdesk — AI agents run support tickets over MCP and pay per action in USDC via x402.

Send SMS, SMS Flash, and voice calls in Brazil via LigueLead API. Brazilian CPaaS with BRL pricing and PIX payments.

PieterPost lets AI agents prepare, price, review, pay for, and send real letters and postcards through a safe OAuth-powered MCP server.

Agent-to-agent service exchange with atomic escrow, cryptographic verification, and per-function reputation. 27 MCP tools.

A Model Context Protocol server that lets AI agents operate the Txtcel Solana program: create channels, post and read messages, follow channels, and run every protocol operation. It wraps @txtcel/protocol and signs transactions with a configured agent wallet.