Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/inboxapi/cli/setup-inboxapinpx skills add inboxapi/cli --skill setup-inboxapigit clone --depth 1 https://github.com/inboxapi/cliWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00044 | $0.01033 |
| Opus 5 | $0.00022 | $0.00517 |
| Sonnet 5 | $0.00009 | $0.00207 |
| Haiku 4.5 | $0.00004 | $0.00103 |
Grade A, and why
setup-inboxapi scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Setup InboxAPI
Configure InboxAPI email tools for this project. Supports Claude Code, Codex CLI, Gemini CLI, and OpenCode.
Steps
-
Check current setup: Look for existing
.mcp.jsonand.claude/settings.jsonfiles -
Add MCP server (if not already configured):
- Check if
.mcp.jsonexists and contains aninboxapientry - If not, run:
claude mcp add inboxapi -- npx -y @inboxapi/cli - Or create/update
.mcp.jsonwith:{ "mcpServers": { "inboxapi": { "command": "npx", "args": ["-y", "@inboxapi/cli"] } } }
For other agents:
- Codex CLI:
codex mcp add inboxapi -- npx -y @inboxapi/cli - Gemini CLI: Add to
settings.jsonundermcpServers:{ "mcpServers": { "inboxapi": { "command": "npx", "args": ["-y", "@inboxapi/cli"] } } } - OpenCode: Add to
opencode.jsonundermcp:{ "mcp": { "inboxapi": { "command": "npx", "args": ["-y", "@inboxapi/cli"] } } }
- Check if
-
Install skills: Run
npx -y @inboxapi/cli setup-skillsto install skills for detected agents- Use
--allto install for all agents, or--claude,--codex,--gemini,--opencodefor specific ones
- Use
-
Verify credentials:
- Run:
npx -y @inboxapi/cli whoamito check if credentials are set up - If not authenticated, instruct the user: "Run
npx -y @inboxapi/cli loginin a terminal to authenticate"
- Run:
-
Show summary:
InboxAPI Setup Complete! MCP Server: configured in .mcp.json Email: <email> (or "not authenticated yet") Installed Skills: /check-inbox — View inbox summary /check-sent — View sent email history /compose — Write and send emails /download-attachment — Download email attachments /email-search — Search emails /email-reply — Reply with thread context /email-digest — Email activity digest /email-forward — Forward emails Installed Hooks (Claude Code only): PreToolUse — Email send guard (reviews before sending) PostToolUse — Activity logger (audit trail) SessionStart — Credential check (verifies auth on startup) Next steps: - Run /check-inbox to see your emails - Run /compose to send your first email
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 92 lines · 44 tokens per session scan A 9ceb024add30
setup-inboxapi is a skill published in the GitHub repository inboxapi/cli (12 stars, last pushed 2mo ago), licensed MIT. It adds 44 tokens to every session and 1,033 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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