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io.github.iancollins27/mailsnail

io.github.iancollins27/mailsnail·v0.6.0·Finance & Payments

Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

In-path gate · all MCP tools

Using io.github.iancollins27/mailsnail in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

curl -fsSL https://mcpindex.ai/install.sh | sh
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

Environment variables
MAIL_PROVIDER
required

Where to mail from: 'managed' (default, no signup, pay-per-piece via Stripe), 'click2mail' (BYO account), or 'lob' (BYO key).

MAIL_API_BASE_URL

Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.

CLICK2MAIL_USERNAME

Click2Mail account username. Required when MAIL_PROVIDER=click2mail.

CLICK2MAIL_PASSWORD
secret

Click2Mail account password. Required when MAIL_PROVIDER=click2mail.

LOB_API_KEY
secret

Lob API key. Required when MAIL_PROVIDER=lob. test_* is free; live_* actually mails.

MAIL_MCP_ALLOW_LIVE

Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.

MAIL_MCP_SPEND_CAP_USD

Per-session estimated spend cap. Server refuses sends past this.

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
15
installability
25
documentation
15
stability
5
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